7601 lines
274 KiB
C++
7601 lines
274 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
// vim:cindent:ts=2:et:sw=2:
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* rendering object for CSS display:block, inline-block, and list-item
|
|
* boxes, also used for various anonymous boxes
|
|
*/
|
|
|
|
#include "nsBlockFrame.h"
|
|
|
|
#include "mozilla/DebugOnly.h"
|
|
#include "mozilla/Maybe.h"
|
|
#include "mozilla/UniquePtr.h"
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsAbsoluteContainingBlock.h"
|
|
#include "nsBlockReflowContext.h"
|
|
#include "BlockReflowInput.h"
|
|
#include "nsBulletFrame.h"
|
|
#include "nsFontMetrics.h"
|
|
#include "nsLineBox.h"
|
|
#include "nsLineLayout.h"
|
|
#include "nsPlaceholderFrame.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsFrameManager.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsIPresShell.h"
|
|
#include "nsStyleContext.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsGkAtoms.h"
|
|
#include "nsGenericHTMLElement.h"
|
|
#include "nsAttrValueInlines.h"
|
|
#include "mozilla/Sprintf.h"
|
|
#include "nsFloatManager.h"
|
|
#include "prenv.h"
|
|
#include "plstr.h"
|
|
#include "nsError.h"
|
|
#include "nsIScrollableFrame.h"
|
|
#include <algorithm>
|
|
#ifdef ACCESSIBILITY
|
|
#include "nsIDOMHTMLDocument.h"
|
|
#endif
|
|
#include "nsLayoutUtils.h"
|
|
#include "nsDisplayList.h"
|
|
#include "nsCSSAnonBoxes.h"
|
|
#include "nsCSSFrameConstructor.h"
|
|
#include "nsRenderingContext.h"
|
|
#include "TextOverflow.h"
|
|
#include "nsIFrameInlines.h"
|
|
#include "CounterStyleManager.h"
|
|
#include "nsISelection.h"
|
|
#include "mozilla/dom/HTMLDetailsElement.h"
|
|
#include "mozilla/dom/HTMLSummaryElement.h"
|
|
#include "mozilla/StyleSetHandle.h"
|
|
#include "mozilla/StyleSetHandleInlines.h"
|
|
|
|
#include "nsBidiPresUtils.h"
|
|
|
|
#include <inttypes.h>
|
|
|
|
static const int MIN_LINES_NEEDING_CURSOR = 20;
|
|
|
|
static const char16_t kDiscCharacter = 0x2022;
|
|
|
|
using namespace mozilla;
|
|
using namespace mozilla::css;
|
|
using namespace mozilla::dom;
|
|
using namespace mozilla::layout;
|
|
typedef nsAbsoluteContainingBlock::AbsPosReflowFlags AbsPosReflowFlags;
|
|
|
|
static void MarkAllDescendantLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsLineList::iterator line = aBlock->LinesBegin();
|
|
nsLineList::iterator endLine = aBlock->LinesEnd();
|
|
while (line != endLine) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame* f = line->mFirstChild;
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(f);
|
|
if (bf) {
|
|
MarkAllDescendantLinesDirty(bf);
|
|
}
|
|
}
|
|
line->MarkDirty();
|
|
++line;
|
|
}
|
|
}
|
|
|
|
static void MarkSameFloatManagerLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsBlockFrame* blockWithFloatMgr = aBlock;
|
|
while (!(blockWithFloatMgr->GetStateBits() & NS_BLOCK_FLOAT_MGR)) {
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(blockWithFloatMgr->GetParent());
|
|
if (!bf) {
|
|
break;
|
|
}
|
|
blockWithFloatMgr = bf;
|
|
}
|
|
|
|
// Mark every line at and below the line where the float was
|
|
// dirty, and mark their lines dirty too. We could probably do
|
|
// something more efficient --- e.g., just dirty the lines that intersect
|
|
// the float vertically.
|
|
MarkAllDescendantLinesDirty(blockWithFloatMgr);
|
|
}
|
|
|
|
/**
|
|
* Returns true if aFrame is a block that has one or more float children.
|
|
*/
|
|
static bool BlockHasAnyFloats(nsIFrame* aFrame)
|
|
{
|
|
nsBlockFrame* block = nsLayoutUtils::GetAsBlock(aFrame);
|
|
if (!block)
|
|
return false;
|
|
if (block->GetChildList(nsIFrame::kFloatList).FirstChild())
|
|
return true;
|
|
|
|
nsLineList::iterator line = block->LinesBegin();
|
|
nsLineList::iterator endLine = block->LinesEnd();
|
|
while (line != endLine) {
|
|
if (line->IsBlock() && BlockHasAnyFloats(line->mFirstChild))
|
|
return true;
|
|
++line;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
#include "nsBlockDebugFlags.h"
|
|
|
|
bool nsBlockFrame::gLamePaintMetrics;
|
|
bool nsBlockFrame::gLameReflowMetrics;
|
|
bool nsBlockFrame::gNoisy;
|
|
bool nsBlockFrame::gNoisyDamageRepair;
|
|
bool nsBlockFrame::gNoisyIntrinsic;
|
|
bool nsBlockFrame::gNoisyReflow;
|
|
bool nsBlockFrame::gReallyNoisyReflow;
|
|
bool nsBlockFrame::gNoisyFloatManager;
|
|
bool nsBlockFrame::gVerifyLines;
|
|
bool nsBlockFrame::gDisableResizeOpt;
|
|
|
|
int32_t nsBlockFrame::gNoiseIndent;
|
|
|
|
struct BlockDebugFlags {
|
|
const char* name;
|
|
bool* on;
|
|
};
|
|
|
|
static const BlockDebugFlags gFlags[] = {
|
|
{ "reflow", &nsBlockFrame::gNoisyReflow },
|
|
{ "really-noisy-reflow", &nsBlockFrame::gReallyNoisyReflow },
|
|
{ "intrinsic", &nsBlockFrame::gNoisyIntrinsic },
|
|
{ "float-manager", &nsBlockFrame::gNoisyFloatManager },
|
|
{ "verify-lines", &nsBlockFrame::gVerifyLines },
|
|
{ "damage-repair", &nsBlockFrame::gNoisyDamageRepair },
|
|
{ "lame-paint-metrics", &nsBlockFrame::gLamePaintMetrics },
|
|
{ "lame-reflow-metrics", &nsBlockFrame::gLameReflowMetrics },
|
|
{ "disable-resize-opt", &nsBlockFrame::gDisableResizeOpt },
|
|
};
|
|
#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
|
|
|
|
static void
|
|
ShowDebugFlags()
|
|
{
|
|
printf("Here are the available GECKO_BLOCK_DEBUG_FLAGS:\n");
|
|
const BlockDebugFlags* bdf = gFlags;
|
|
const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
|
|
for (; bdf < end; bdf++) {
|
|
printf(" %s\n", bdf->name);
|
|
}
|
|
printf("Note: GECKO_BLOCK_DEBUG_FLAGS is a comma separated list of flag\n");
|
|
printf("names (no whitespace)\n");
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::InitDebugFlags()
|
|
{
|
|
static bool firstTime = true;
|
|
if (firstTime) {
|
|
firstTime = false;
|
|
char* flags = PR_GetEnv("GECKO_BLOCK_DEBUG_FLAGS");
|
|
if (flags) {
|
|
bool error = false;
|
|
for (;;) {
|
|
char* cm = PL_strchr(flags, ',');
|
|
if (cm) *cm = '\0';
|
|
|
|
bool found = false;
|
|
const BlockDebugFlags* bdf = gFlags;
|
|
const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
|
|
for (; bdf < end; bdf++) {
|
|
if (PL_strcasecmp(bdf->name, flags) == 0) {
|
|
*(bdf->on) = true;
|
|
printf("nsBlockFrame: setting %s debug flag on\n", bdf->name);
|
|
gNoisy = true;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
error = true;
|
|
}
|
|
|
|
if (!cm) break;
|
|
*cm = ',';
|
|
flags = cm + 1;
|
|
}
|
|
if (error) {
|
|
ShowDebugFlags();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
// Debugging support code
|
|
|
|
#ifdef DEBUG
|
|
const char* nsBlockFrame::kReflowCommandType[] = {
|
|
"ContentChanged",
|
|
"StyleChanged",
|
|
"ReflowDirty",
|
|
"Timeout",
|
|
"UserDefined",
|
|
};
|
|
|
|
const char*
|
|
nsBlockFrame::LineReflowStatusToString(LineReflowStatus aLineReflowStatus) const
|
|
{
|
|
switch (aLineReflowStatus) {
|
|
case LineReflowStatus::OK: return "LINE_REFLOW_OK";
|
|
case LineReflowStatus::Stop: return "LINE_REFLOW_STOP";
|
|
case LineReflowStatus::RedoNoPull: return "LINE_REFLOW_REDO_NO_PULL";
|
|
case LineReflowStatus::RedoMoreFloats: return "LINE_REFLOW_REDO_MORE_FLOATS";
|
|
case LineReflowStatus::RedoNextBand: return "LINE_REFLOW_REDO_NEXT_BAND";
|
|
case LineReflowStatus::Truncated: return "LINE_REFLOW_TRUNCATED";
|
|
}
|
|
return "unknown";
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef REFLOW_STATUS_COVERAGE
|
|
static void
|
|
RecordReflowStatus(bool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
|
|
{
|
|
static uint32_t record[2];
|
|
|
|
// 0: child-is-block
|
|
// 1: child-is-inline
|
|
int index = 0;
|
|
if (!aChildIsBlock) index |= 1;
|
|
|
|
// Compute new status
|
|
uint32_t newS = record[index];
|
|
if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
|
|
if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
|
|
newS |= 1;
|
|
}
|
|
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
|
|
newS |= 2;
|
|
}
|
|
else {
|
|
newS |= 4;
|
|
}
|
|
}
|
|
else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
|
|
newS |= 8;
|
|
}
|
|
else {
|
|
newS |= 16;
|
|
}
|
|
|
|
// Log updates to the status that yield different values
|
|
if (record[index] != newS) {
|
|
record[index] = newS;
|
|
printf("record(%d): %02x %02x\n", index, record[0], record[1]);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
NS_DECLARE_FRAME_PROPERTY_WITH_DTOR_NEVER_CALLED(OverflowLinesProperty,
|
|
nsBlockFrame::FrameLines)
|
|
NS_DECLARE_FRAME_PROPERTY_FRAMELIST(OverflowOutOfFlowsProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_FRAMELIST(PushedFloatProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_FRAMELIST(OutsideBulletProperty)
|
|
NS_DECLARE_FRAME_PROPERTY_WITHOUT_DTOR(InsideBulletProperty, nsBulletFrame)
|
|
NS_DECLARE_FRAME_PROPERTY_SMALL_VALUE(BlockEndEdgeOfChildrenProperty, nscoord)
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsBlockFrame*
|
|
NS_NewBlockFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
|
|
{
|
|
return new (aPresShell) nsBlockFrame(aContext);
|
|
}
|
|
|
|
nsBlockFrame*
|
|
NS_NewBlockFormattingContext(nsIPresShell* aPresShell,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
nsBlockFrame* blockFrame = NS_NewBlockFrame(aPresShell, aStyleContext);
|
|
blockFrame->AddStateBits(NS_BLOCK_FORMATTING_CONTEXT_STATE_BITS);
|
|
return blockFrame;
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsBlockFrame)
|
|
|
|
nsBlockFrame::~nsBlockFrame()
|
|
{
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DestroyFrom(nsIFrame* aDestructRoot)
|
|
{
|
|
ClearLineCursor();
|
|
DestroyAbsoluteFrames(aDestructRoot);
|
|
mFloats.DestroyFramesFrom(aDestructRoot);
|
|
nsPresContext* presContext = PresContext();
|
|
nsIPresShell* shell = presContext->PresShell();
|
|
nsLineBox::DeleteLineList(presContext, mLines, aDestructRoot,
|
|
&mFrames);
|
|
|
|
if (HasPushedFloats()) {
|
|
SafelyDestroyFrameListProp(aDestructRoot, shell,
|
|
PushedFloatProperty());
|
|
RemoveStateBits(NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
}
|
|
|
|
// destroy overflow lines now
|
|
FrameLines* overflowLines = RemoveOverflowLines();
|
|
if (overflowLines) {
|
|
nsLineBox::DeleteLineList(presContext, overflowLines->mLines,
|
|
aDestructRoot, &overflowLines->mFrames);
|
|
delete overflowLines;
|
|
}
|
|
|
|
if (GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS) {
|
|
SafelyDestroyFrameListProp(aDestructRoot, shell,
|
|
OverflowOutOfFlowsProperty());
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
|
|
if (HasOutsideBullet()) {
|
|
SafelyDestroyFrameListProp(aDestructRoot, shell,
|
|
OutsideBulletProperty());
|
|
RemoveStateBits(NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
|
|
}
|
|
|
|
nsContainerFrame::DestroyFrom(aDestructRoot);
|
|
}
|
|
|
|
/* virtual */ nsILineIterator*
|
|
nsBlockFrame::GetLineIterator()
|
|
{
|
|
nsLineIterator* it = new nsLineIterator;
|
|
if (!it)
|
|
return nullptr;
|
|
|
|
const nsStyleVisibility* visibility = StyleVisibility();
|
|
nsresult rv = it->Init(mLines, visibility->mDirection == NS_STYLE_DIRECTION_RTL);
|
|
if (NS_FAILED(rv)) {
|
|
delete it;
|
|
return nullptr;
|
|
}
|
|
return it;
|
|
}
|
|
|
|
NS_QUERYFRAME_HEAD(nsBlockFrame)
|
|
NS_QUERYFRAME_ENTRY(nsBlockFrame)
|
|
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
|
|
|
|
nsSplittableType
|
|
nsBlockFrame::GetSplittableType() const
|
|
{
|
|
return NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
void
|
|
nsBlockFrame::List(FILE* out, const char* aPrefix, uint32_t aFlags) const
|
|
{
|
|
nsCString str;
|
|
ListGeneric(str, aPrefix, aFlags);
|
|
|
|
fprintf_stderr(out, "%s<\n", str.get());
|
|
|
|
nsCString pfx(aPrefix);
|
|
pfx += " ";
|
|
|
|
// Output the lines
|
|
if (!mLines.empty()) {
|
|
ConstLineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
for ( ; line != line_end; ++line) {
|
|
line->List(out, pfx.get(), aFlags);
|
|
}
|
|
}
|
|
|
|
// Output the overflow lines.
|
|
const FrameLines* overflowLines = GetOverflowLines();
|
|
if (overflowLines && !overflowLines->mLines.empty()) {
|
|
fprintf_stderr(out, "%sOverflow-lines %p/%p <\n", pfx.get(), overflowLines, &overflowLines->mFrames);
|
|
nsCString nestedPfx(pfx);
|
|
nestedPfx += " ";
|
|
ConstLineIterator line = overflowLines->mLines.begin(),
|
|
line_end = overflowLines->mLines.end();
|
|
for ( ; line != line_end; ++line) {
|
|
line->List(out, nestedPfx.get(), aFlags);
|
|
}
|
|
fprintf_stderr(out, "%s>\n", pfx.get());
|
|
}
|
|
|
|
// skip the principal list - we printed the lines above
|
|
// skip the overflow list - we printed the overflow lines above
|
|
ChildListIterator lists(this);
|
|
ChildListIDs skip(kPrincipalList | kOverflowList);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
if (skip.Contains(lists.CurrentID())) {
|
|
continue;
|
|
}
|
|
fprintf_stderr(out, "%s%s %p <\n", pfx.get(),
|
|
mozilla::layout::ChildListName(lists.CurrentID()),
|
|
&GetChildList(lists.CurrentID()));
|
|
nsCString nestedPfx(pfx);
|
|
nestedPfx += " ";
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* kid = childFrames.get();
|
|
kid->List(out, nestedPfx.get(), aFlags);
|
|
}
|
|
fprintf_stderr(out, "%s>\n", pfx.get());
|
|
}
|
|
|
|
fprintf_stderr(out, "%s>\n", aPrefix);
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Block"), aResult);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
nsFrameState
|
|
nsBlockFrame::GetDebugStateBits() const
|
|
{
|
|
// We don't want to include our cursor flag in the bits the
|
|
// regression tester looks at
|
|
return nsContainerFrame::GetDebugStateBits() & ~NS_BLOCK_HAS_LINE_CURSOR;
|
|
}
|
|
#endif
|
|
|
|
nsIAtom*
|
|
nsBlockFrame::GetType() const
|
|
{
|
|
return nsGkAtoms::blockFrame;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::InvalidateFrame(uint32_t aDisplayItemKey)
|
|
{
|
|
if (IsSVGText()) {
|
|
NS_ASSERTION(GetParent()->GetType() == nsGkAtoms::svgTextFrame,
|
|
"unexpected block frame in SVG text");
|
|
GetParent()->InvalidateFrame();
|
|
return;
|
|
}
|
|
nsContainerFrame::InvalidateFrame(aDisplayItemKey);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey)
|
|
{
|
|
if (IsSVGText()) {
|
|
NS_ASSERTION(GetParent()->GetType() == nsGkAtoms::svgTextFrame,
|
|
"unexpected block frame in SVG text");
|
|
GetParent()->InvalidateFrame();
|
|
return;
|
|
}
|
|
nsContainerFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey);
|
|
}
|
|
|
|
nscoord
|
|
nsBlockFrame::GetLogicalBaseline(WritingMode aWM) const
|
|
{
|
|
auto lastBaseline =
|
|
BaselineBOffset(aWM, BaselineSharingGroup::eLast, AlignmentContext::eInline);
|
|
return BSize(aWM) - lastBaseline;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::GetNaturalBaselineBOffset(mozilla::WritingMode aWM,
|
|
BaselineSharingGroup aBaselineGroup,
|
|
nscoord* aBaseline) const
|
|
{
|
|
if (aBaselineGroup == BaselineSharingGroup::eFirst) {
|
|
return nsLayoutUtils::GetFirstLineBaseline(aWM, this, aBaseline);
|
|
}
|
|
|
|
for (ConstReverseLineIterator line = LinesRBegin(), line_end = LinesREnd();
|
|
line != line_end; ++line) {
|
|
if (line->IsBlock()) {
|
|
nscoord offset;
|
|
nsIFrame* kid = line->mFirstChild;
|
|
if (kid->GetVerticalAlignBaseline(aWM, &offset)) {
|
|
// Ignore relative positioning for baseline calculations.
|
|
const nsSize& sz = line->mContainerSize;
|
|
offset += kid->GetLogicalNormalPosition(aWM, sz).B(aWM);
|
|
*aBaseline = BSize(aWM) - offset;
|
|
return true;
|
|
}
|
|
} else {
|
|
// XXX Is this the right test? We have some bogus empty lines
|
|
// floating around, but IsEmpty is perhaps too weak.
|
|
if (line->BSize() != 0 || !line->IsEmpty()) {
|
|
*aBaseline = BSize(aWM) - (line->BStart() + line->GetLogicalAscent());
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
nscoord
|
|
nsBlockFrame::GetCaretBaseline() const
|
|
{
|
|
nsRect contentRect = GetContentRect();
|
|
nsMargin bp = GetUsedBorderAndPadding();
|
|
|
|
if (!mLines.empty()) {
|
|
ConstLineIterator line = LinesBegin();
|
|
const nsLineBox* firstLine = line;
|
|
if (firstLine->GetChildCount()) {
|
|
return bp.top + firstLine->mFirstChild->GetCaretBaseline();
|
|
}
|
|
}
|
|
float inflation = nsLayoutUtils::FontSizeInflationFor(this);
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, inflation);
|
|
nscoord lineHeight =
|
|
ReflowInput::CalcLineHeight(GetContent(), StyleContext(),
|
|
contentRect.height, inflation);
|
|
const WritingMode wm = GetWritingMode();
|
|
return nsLayoutUtils::GetCenteredFontBaseline(fm, lineHeight,
|
|
wm.IsLineInverted()) + bp.top;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Child frame enumeration
|
|
|
|
const nsFrameList&
|
|
nsBlockFrame::GetChildList(ChildListID aListID) const
|
|
{
|
|
switch (aListID) {
|
|
case kPrincipalList:
|
|
return mFrames;
|
|
case kOverflowList: {
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
return overflowLines ? overflowLines->mFrames : nsFrameList::EmptyList();
|
|
}
|
|
case kFloatList:
|
|
return mFloats;
|
|
case kOverflowOutOfFlowList: {
|
|
const nsFrameList* list = GetOverflowOutOfFlows();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
case kPushedFloatsList: {
|
|
const nsFrameList* list = GetPushedFloats();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
case kBulletList: {
|
|
const nsFrameList* list = GetOutsideBulletList();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
default:
|
|
return nsContainerFrame::GetChildList(aListID);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::GetChildLists(nsTArray<ChildList>* aLists) const
|
|
{
|
|
nsContainerFrame::GetChildLists(aLists);
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
overflowLines->mFrames.AppendIfNonempty(aLists, kOverflowList);
|
|
}
|
|
const nsFrameList* list = GetOverflowOutOfFlows();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kOverflowOutOfFlowList);
|
|
}
|
|
mFloats.AppendIfNonempty(aLists, kFloatList);
|
|
list = GetOutsideBulletList();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kBulletList);
|
|
}
|
|
list = GetPushedFloats();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kPushedFloatsList);
|
|
}
|
|
}
|
|
|
|
/* virtual */ bool
|
|
nsBlockFrame::IsFloatContainingBlock() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
ReparentFrame(nsIFrame* aFrame, nsContainerFrame* aOldParent,
|
|
nsContainerFrame* aNewParent)
|
|
{
|
|
NS_ASSERTION(aOldParent == aFrame->GetParent(),
|
|
"Parent not consistent with expectations");
|
|
|
|
aFrame->SetParent(aNewParent);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
nsContainerFrame::ReparentFrameView(aFrame, aOldParent, aNewParent);
|
|
}
|
|
|
|
static void
|
|
ReparentFrames(nsFrameList& aFrameList, nsContainerFrame* aOldParent,
|
|
nsContainerFrame* aNewParent)
|
|
{
|
|
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
|
|
ReparentFrame(e.get(), aOldParent, aNewParent);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the first line from aFromLines and adjust the associated frame list
|
|
* aFromFrames accordingly. The removed line is assigned to *aOutLine and
|
|
* a frame list with its frames is assigned to *aOutFrames, i.e. the frames
|
|
* that were extracted from the head of aFromFrames.
|
|
* aFromLines must contain at least one line, the line may be empty.
|
|
* @return true if aFromLines becomes empty
|
|
*/
|
|
static bool
|
|
RemoveFirstLine(nsLineList& aFromLines, nsFrameList& aFromFrames,
|
|
nsLineBox** aOutLine, nsFrameList* aOutFrames)
|
|
{
|
|
nsLineList_iterator removedLine = aFromLines.begin();
|
|
*aOutLine = removedLine;
|
|
nsLineList_iterator next = aFromLines.erase(removedLine);
|
|
bool isLastLine = next == aFromLines.end();
|
|
nsIFrame* lastFrame = isLastLine ? aFromFrames.LastChild()
|
|
: next->mFirstChild->GetPrevSibling();
|
|
nsFrameList::FrameLinkEnumerator linkToBreak(aFromFrames, lastFrame);
|
|
*aOutFrames = aFromFrames.ExtractHead(linkToBreak);
|
|
return isLastLine;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Reflow methods
|
|
|
|
/* virtual */ void
|
|
nsBlockFrame::MarkIntrinsicISizesDirty()
|
|
{
|
|
nsBlockFrame* dirtyBlock = static_cast<nsBlockFrame*>(FirstContinuation());
|
|
dirtyBlock->mMinWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
dirtyBlock->mPrefWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
if (!(GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)) {
|
|
for (nsIFrame* frame = dirtyBlock; frame;
|
|
frame = frame->GetNextContinuation()) {
|
|
frame->AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
|
|
}
|
|
}
|
|
|
|
nsContainerFrame::MarkIntrinsicISizesDirty();
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CheckIntrinsicCacheAgainstShrinkWrapState()
|
|
{
|
|
nsPresContext *presContext = PresContext();
|
|
if (!nsLayoutUtils::FontSizeInflationEnabled(presContext)) {
|
|
return;
|
|
}
|
|
bool inflationEnabled =
|
|
!presContext->mInflationDisabledForShrinkWrap;
|
|
if (inflationEnabled !=
|
|
!!(GetStateBits() & NS_BLOCK_FRAME_INTRINSICS_INFLATED)) {
|
|
mMinWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
mPrefWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
if (inflationEnabled) {
|
|
AddStateBits(NS_BLOCK_FRAME_INTRINSICS_INFLATED);
|
|
} else {
|
|
RemoveStateBits(NS_BLOCK_FRAME_INTRINSICS_INFLATED);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsBlockFrame::GetMinISize(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nsIFrame* firstInFlow = FirstContinuation();
|
|
if (firstInFlow != this)
|
|
return firstInFlow->GetMinISize(aRenderingContext);
|
|
|
|
DISPLAY_MIN_WIDTH(this, mMinWidth);
|
|
|
|
CheckIntrinsicCacheAgainstShrinkWrapState();
|
|
|
|
if (mMinWidth != NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
return mMinWidth;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": GetMinISize\n");
|
|
}
|
|
AutoNoisyIndenter indenter(gNoisyIntrinsic);
|
|
#endif
|
|
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
curFrame->LazyMarkLinesDirty();
|
|
}
|
|
|
|
if (RenumberList()) {
|
|
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
ResolveBidi();
|
|
InlineMinISizeData data;
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
for (LineIterator line = curFrame->LinesBegin(), line_end = curFrame->LinesEnd();
|
|
line != line_end; ++line)
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line (%s%s)\n",
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->IsEmpty() ? ", empty" : "");
|
|
}
|
|
AutoNoisyIndenter lineindent(gNoisyIntrinsic);
|
|
#endif
|
|
if (line->IsBlock()) {
|
|
data.ForceBreak();
|
|
data.mCurrentLine = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
|
|
line->mFirstChild, nsLayoutUtils::MIN_ISIZE);
|
|
data.ForceBreak();
|
|
} else {
|
|
if (!curFrame->GetPrevContinuation() &&
|
|
line == curFrame->LinesBegin()) {
|
|
// Only add text-indent if it has no percentages; using a
|
|
// percentage basis of 0 unconditionally would give strange
|
|
// behavior for calc(10%-3px).
|
|
const nsStyleCoord &indent = StyleText()->mTextIndent;
|
|
if (indent.ConvertsToLength())
|
|
data.mCurrentLine += nsRuleNode::ComputeCoordPercentCalc(indent, 0);
|
|
}
|
|
// XXX Bug NNNNNN Should probably handle percentage text-indent.
|
|
|
|
data.mLine = &line;
|
|
data.SetLineContainer(curFrame);
|
|
nsIFrame *kid = line->mFirstChild;
|
|
for (int32_t i = 0, i_end = line->GetChildCount(); i != i_end;
|
|
++i, kid = kid->GetNextSibling()) {
|
|
kid->AddInlineMinISize(aRenderingContext, &data);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("min: [prevLines=%d currentLine=%d]\n",
|
|
data.mPrevLines, data.mCurrentLine);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
data.ForceBreak();
|
|
|
|
mMinWidth = data.mPrevLines;
|
|
return mMinWidth;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsBlockFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nsIFrame* firstInFlow = FirstContinuation();
|
|
if (firstInFlow != this)
|
|
return firstInFlow->GetPrefISize(aRenderingContext);
|
|
|
|
DISPLAY_PREF_WIDTH(this, mPrefWidth);
|
|
|
|
CheckIntrinsicCacheAgainstShrinkWrapState();
|
|
|
|
if (mPrefWidth != NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
return mPrefWidth;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": GetPrefISize\n");
|
|
}
|
|
AutoNoisyIndenter indenter(gNoisyIntrinsic);
|
|
#endif
|
|
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
curFrame->LazyMarkLinesDirty();
|
|
}
|
|
|
|
if (RenumberList()) {
|
|
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
ResolveBidi();
|
|
InlinePrefISizeData data;
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
for (LineIterator line = curFrame->LinesBegin(), line_end = curFrame->LinesEnd();
|
|
line != line_end; ++line)
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line (%s%s)\n",
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->IsEmpty() ? ", empty" : "");
|
|
}
|
|
AutoNoisyIndenter lineindent(gNoisyIntrinsic);
|
|
#endif
|
|
if (line->IsBlock()) {
|
|
data.ForceBreak();
|
|
data.mCurrentLine = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
|
|
line->mFirstChild, nsLayoutUtils::PREF_ISIZE);
|
|
data.ForceBreak();
|
|
} else {
|
|
if (!curFrame->GetPrevContinuation() &&
|
|
line == curFrame->LinesBegin()) {
|
|
// Only add text-indent if it has no percentages; using a
|
|
// percentage basis of 0 unconditionally would give strange
|
|
// behavior for calc(10%-3px).
|
|
const nsStyleCoord &indent = StyleText()->mTextIndent;
|
|
if (indent.ConvertsToLength())
|
|
data.mCurrentLine += nsRuleNode::ComputeCoordPercentCalc(indent, 0);
|
|
}
|
|
// XXX Bug NNNNNN Should probably handle percentage text-indent.
|
|
|
|
data.mLine = &line;
|
|
data.SetLineContainer(curFrame);
|
|
nsIFrame *kid = line->mFirstChild;
|
|
for (int32_t i = 0, i_end = line->GetChildCount(); i != i_end;
|
|
++i, kid = kid->GetNextSibling()) {
|
|
kid->AddInlinePrefISize(aRenderingContext, &data);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("pref: [prevLines=%d currentLine=%d]\n",
|
|
data.mPrevLines, data.mCurrentLine);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
data.ForceBreak();
|
|
|
|
mPrefWidth = data.mPrevLines;
|
|
return mPrefWidth;
|
|
}
|
|
|
|
nsRect
|
|
nsBlockFrame::ComputeTightBounds(DrawTarget* aDrawTarget) const
|
|
{
|
|
// be conservative
|
|
if (StyleContext()->HasTextDecorationLines()) {
|
|
return GetVisualOverflowRect();
|
|
}
|
|
return ComputeSimpleTightBounds(aDrawTarget);
|
|
}
|
|
|
|
/* virtual */ nsresult
|
|
nsBlockFrame::GetPrefWidthTightBounds(nsRenderingContext* aRenderingContext,
|
|
nscoord* aX,
|
|
nscoord* aXMost)
|
|
{
|
|
nsIFrame* firstInFlow = FirstContinuation();
|
|
if (firstInFlow != this) {
|
|
return firstInFlow->GetPrefWidthTightBounds(aRenderingContext, aX, aXMost);
|
|
}
|
|
|
|
*aX = 0;
|
|
*aXMost = 0;
|
|
|
|
nsresult rv;
|
|
InlinePrefISizeData data;
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
for (LineIterator line = curFrame->LinesBegin(), line_end = curFrame->LinesEnd();
|
|
line != line_end; ++line)
|
|
{
|
|
nscoord childX, childXMost;
|
|
if (line->IsBlock()) {
|
|
data.ForceBreak();
|
|
rv = line->mFirstChild->GetPrefWidthTightBounds(aRenderingContext,
|
|
&childX, &childXMost);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
*aX = std::min(*aX, childX);
|
|
*aXMost = std::max(*aXMost, childXMost);
|
|
} else {
|
|
if (!curFrame->GetPrevContinuation() &&
|
|
line == curFrame->LinesBegin()) {
|
|
// Only add text-indent if it has no percentages; using a
|
|
// percentage basis of 0 unconditionally would give strange
|
|
// behavior for calc(10%-3px).
|
|
const nsStyleCoord &indent = StyleText()->mTextIndent;
|
|
if (indent.ConvertsToLength()) {
|
|
data.mCurrentLine += nsRuleNode::ComputeCoordPercentCalc(indent, 0);
|
|
}
|
|
}
|
|
// XXX Bug NNNNNN Should probably handle percentage text-indent.
|
|
|
|
data.mLine = &line;
|
|
data.SetLineContainer(curFrame);
|
|
nsIFrame *kid = line->mFirstChild;
|
|
for (int32_t i = 0, i_end = line->GetChildCount(); i != i_end;
|
|
++i, kid = kid->GetNextSibling()) {
|
|
rv = kid->GetPrefWidthTightBounds(aRenderingContext, &childX,
|
|
&childXMost);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
*aX = std::min(*aX, data.mCurrentLine + childX);
|
|
*aXMost = std::max(*aXMost, data.mCurrentLine + childXMost);
|
|
kid->AddInlinePrefISize(aRenderingContext, &data);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
data.ForceBreak();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Return whether aNewAvailableSpace is smaller *on either side*
|
|
* (inline-start or inline-end) than aOldAvailableSpace, so that we know
|
|
* if we need to redo layout on an line, replaced block, or block
|
|
* formatting context, because its height (which we used to compute
|
|
* aNewAvailableSpace) caused it to intersect additional floats.
|
|
*/
|
|
static bool
|
|
AvailableSpaceShrunk(WritingMode aWM,
|
|
const LogicalRect& aOldAvailableSpace,
|
|
const LogicalRect& aNewAvailableSpace,
|
|
bool aCanGrow /* debug-only */)
|
|
{
|
|
if (aNewAvailableSpace.ISize(aWM) == 0) {
|
|
// Positions are not significant if the inline size is zero.
|
|
return aOldAvailableSpace.ISize(aWM) != 0;
|
|
}
|
|
if (aCanGrow) {
|
|
NS_ASSERTION(aNewAvailableSpace.IStart(aWM) <=
|
|
aOldAvailableSpace.IStart(aWM) ||
|
|
aNewAvailableSpace.IEnd(aWM) <= aOldAvailableSpace.IEnd(aWM),
|
|
"available space should not shrink on the start side and "
|
|
"grow on the end side");
|
|
NS_ASSERTION(aNewAvailableSpace.IStart(aWM) >=
|
|
aOldAvailableSpace.IStart(aWM) ||
|
|
aNewAvailableSpace.IEnd(aWM) >= aOldAvailableSpace.IEnd(aWM),
|
|
"available space should not grow on the start side and "
|
|
"shrink on the end side");
|
|
} else {
|
|
NS_ASSERTION(aOldAvailableSpace.IStart(aWM) <=
|
|
aNewAvailableSpace.IStart(aWM) &&
|
|
aOldAvailableSpace.IEnd(aWM) >=
|
|
aNewAvailableSpace.IEnd(aWM),
|
|
"available space should never grow");
|
|
}
|
|
// Have we shrunk on either side?
|
|
return aNewAvailableSpace.IStart(aWM) > aOldAvailableSpace.IStart(aWM) ||
|
|
aNewAvailableSpace.IEnd(aWM) < aOldAvailableSpace.IEnd(aWM);
|
|
}
|
|
|
|
static LogicalSize
|
|
CalculateContainingBlockSizeForAbsolutes(WritingMode aWM,
|
|
const ReflowInput& aReflowInput,
|
|
LogicalSize aFrameSize)
|
|
{
|
|
// The issue here is that for a 'height' of 'auto' the reflow state
|
|
// code won't know how to calculate the containing block height
|
|
// because it's calculated bottom up. So we use our own computed
|
|
// size as the dimensions.
|
|
nsIFrame* frame = aReflowInput.mFrame;
|
|
|
|
LogicalSize cbSize(aFrameSize);
|
|
// Containing block is relative to the padding edge
|
|
const LogicalMargin& border =
|
|
LogicalMargin(aWM, aReflowInput.ComputedPhysicalBorderPadding() -
|
|
aReflowInput.ComputedPhysicalPadding());
|
|
cbSize.ISize(aWM) -= border.IStartEnd(aWM);
|
|
cbSize.BSize(aWM) -= border.BStartEnd(aWM);
|
|
|
|
if (frame->GetParent()->GetContent() == frame->GetContent() &&
|
|
frame->GetParent()->GetType() != nsGkAtoms::canvasFrame) {
|
|
// We are a wrapped frame for the content (and the wrapper is not the
|
|
// canvas frame, whose size is not meaningful here).
|
|
// Use the container's dimensions, if they have been precomputed.
|
|
// XXX This is a hack! We really should be waiting until the outermost
|
|
// frame is fully reflowed and using the resulting dimensions, even
|
|
// if they're intrinsic.
|
|
// In fact we should be attaching absolute children to the outermost
|
|
// frame and not always sticking them in block frames.
|
|
|
|
// First, find the reflow state for the outermost frame for this
|
|
// content, except for fieldsets where the inner anonymous frame has
|
|
// the correct padding area with the legend taken into account.
|
|
const ReflowInput* aLastRI = &aReflowInput;
|
|
const ReflowInput* lastButOneRI = &aReflowInput;
|
|
while (aLastRI->mParentReflowInput &&
|
|
aLastRI->mParentReflowInput->mFrame->GetContent() == frame->GetContent() &&
|
|
aLastRI->mParentReflowInput->mFrame->GetType() != nsGkAtoms::fieldSetFrame) {
|
|
lastButOneRI = aLastRI;
|
|
aLastRI = aLastRI->mParentReflowInput;
|
|
}
|
|
if (aLastRI != &aReflowInput) {
|
|
// Scrollbars need to be specifically excluded, if present, because they are outside the
|
|
// padding-edge. We need better APIs for getting the various boxes from a frame.
|
|
nsIScrollableFrame* scrollFrame = do_QueryFrame(aLastRI->mFrame);
|
|
nsMargin scrollbars(0,0,0,0);
|
|
if (scrollFrame) {
|
|
scrollbars =
|
|
scrollFrame->GetDesiredScrollbarSizes(aLastRI->mFrame->PresContext(),
|
|
aLastRI->mRenderingContext);
|
|
if (!lastButOneRI->mFlags.mAssumingHScrollbar) {
|
|
scrollbars.top = scrollbars.bottom = 0;
|
|
}
|
|
if (!lastButOneRI->mFlags.mAssumingVScrollbar) {
|
|
scrollbars.left = scrollbars.right = 0;
|
|
}
|
|
}
|
|
// We found a reflow state for the outermost wrapping frame, so use
|
|
// its computed metrics if available, converted to our writing mode
|
|
WritingMode lastWM = aLastRI->GetWritingMode();
|
|
LogicalSize lastRISize =
|
|
LogicalSize(lastWM,
|
|
aLastRI->ComputedISize(),
|
|
aLastRI->ComputedBSize()).ConvertTo(aWM, lastWM);
|
|
LogicalMargin lastRIPadding =
|
|
aLastRI->ComputedLogicalPadding().ConvertTo(aWM, lastWM);
|
|
LogicalMargin logicalScrollbars(aWM, scrollbars);
|
|
if (lastRISize.ISize(aWM) != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.ISize(aWM) = std::max(0, lastRISize.ISize(aWM) +
|
|
lastRIPadding.IStartEnd(aWM) -
|
|
logicalScrollbars.IStartEnd(aWM));
|
|
}
|
|
if (lastRISize.BSize(aWM) != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.BSize(aWM) = std::max(0, lastRISize.BSize(aWM) +
|
|
lastRIPadding.BStartEnd(aWM) -
|
|
logicalScrollbars.BStartEnd(aWM));
|
|
}
|
|
}
|
|
}
|
|
|
|
return cbSize;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::Reflow(nsPresContext* aPresContext,
|
|
ReflowOutput& aMetrics,
|
|
const ReflowInput& aReflowInput,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
MarkInReflow();
|
|
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": begin reflow availSize=%d,%d computedSize=%d,%d\n",
|
|
aReflowInput.AvailableISize(), aReflowInput.AvailableBSize(),
|
|
aReflowInput.ComputedISize(), aReflowInput.ComputedBSize());
|
|
}
|
|
AutoNoisyIndenter indent(gNoisy);
|
|
PRTime start = 0; // Initialize these variablies to silence the compiler.
|
|
int32_t ctc = 0; // We only use these if they are set (gLameReflowMetrics).
|
|
if (gLameReflowMetrics) {
|
|
start = PR_Now();
|
|
ctc = nsLineBox::GetCtorCount();
|
|
}
|
|
#endif
|
|
|
|
const ReflowInput *reflowInput = &aReflowInput;
|
|
WritingMode wm = aReflowInput.GetWritingMode();
|
|
nscoord consumedBSize = GetConsumedBSize();
|
|
nscoord effectiveComputedBSize = GetEffectiveComputedBSize(aReflowInput,
|
|
consumedBSize);
|
|
Maybe<ReflowInput> mutableReflowInput;
|
|
// If we have non-auto block size, we're clipping our kids and we fit,
|
|
// make sure our kids fit too.
|
|
if (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
|
|
aReflowInput.ComputedBSize() != NS_AUTOHEIGHT &&
|
|
ShouldApplyOverflowClipping(this, aReflowInput.mStyleDisplay)) {
|
|
LogicalMargin blockDirExtras = aReflowInput.ComputedLogicalBorderPadding();
|
|
if (GetLogicalSkipSides().BStart()) {
|
|
blockDirExtras.BStart(wm) = 0;
|
|
} else {
|
|
// Block-end margin never causes us to create continuations, so we
|
|
// don't need to worry about whether it fits in its entirety.
|
|
blockDirExtras.BStart(wm) +=
|
|
aReflowInput.ComputedLogicalMargin().BStart(wm);
|
|
}
|
|
|
|
if (effectiveComputedBSize + blockDirExtras.BStartEnd(wm) <=
|
|
aReflowInput.AvailableBSize()) {
|
|
mutableReflowInput.emplace(aReflowInput);
|
|
mutableReflowInput->AvailableBSize() = NS_UNCONSTRAINEDSIZE;
|
|
reflowInput = mutableReflowInput.ptr();
|
|
}
|
|
}
|
|
|
|
// See comment below about oldSize. Use *only* for the
|
|
// abs-pos-containing-block-size-change optimization!
|
|
nsSize oldSize = GetSize();
|
|
|
|
// Should we create a float manager?
|
|
nsAutoFloatManager autoFloatManager(const_cast<ReflowInput&>(*reflowInput));
|
|
|
|
// XXXldb If we start storing the float manager in the frame rather
|
|
// than keeping it around only during reflow then we should create it
|
|
// only when there are actually floats to manage. Otherwise things
|
|
// like tables will gain significant bloat.
|
|
bool needFloatManager = nsBlockFrame::BlockNeedsFloatManager(this);
|
|
if (needFloatManager)
|
|
autoFloatManager.CreateFloatManager(aPresContext);
|
|
|
|
// OK, some lines may be reflowed. Blow away any saved line cursor
|
|
// because we may invalidate the nondecreasing
|
|
// overflowArea.VisualOverflow().y/yMost invariant, and we may even
|
|
// delete the line with the line cursor.
|
|
ClearLineCursor();
|
|
|
|
if (IsFrameTreeTooDeep(*reflowInput, aMetrics, aStatus)) {
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Between when we drain pushed floats and when we complete reflow,
|
|
// we're allowed to have multiple continuations of the same float on
|
|
// our floats list, since a first-in-flow might get pushed to a later
|
|
// continuation of its containing block. But it's not permitted
|
|
// outside that time.
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(this, mFloats);
|
|
#endif
|
|
|
|
// ALWAYS drain overflow. We never want to leave the previnflow's
|
|
// overflow lines hanging around; block reflow depends on the
|
|
// overflow line lists being cleared out between reflow passes.
|
|
DrainOverflowLines();
|
|
|
|
bool blockStartMarginRoot, blockEndMarginRoot;
|
|
IsMarginRoot(&blockStartMarginRoot, &blockEndMarginRoot);
|
|
|
|
// Cache the consumed height in the block reflow state so that we don't have
|
|
// to continually recompute it.
|
|
BlockReflowInput state(*reflowInput, aPresContext, this,
|
|
blockStartMarginRoot, blockEndMarginRoot,
|
|
needFloatManager, consumedBSize);
|
|
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
static_cast<nsBlockFrame*>(FirstContinuation())->ResolveBidi();
|
|
|
|
if (RenumberList()) {
|
|
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
|
|
// Handle paginated overflow (see nsContainerFrame.h)
|
|
nsOverflowAreas ocBounds;
|
|
nsReflowStatus ocStatus = NS_FRAME_COMPLETE;
|
|
if (GetPrevInFlow()) {
|
|
ReflowOverflowContainerChildren(aPresContext, *reflowInput, ocBounds, 0,
|
|
ocStatus);
|
|
}
|
|
|
|
// Now that we're done cleaning up our overflow container lists, we can
|
|
// give |state| its nsOverflowContinuationTracker.
|
|
nsOverflowContinuationTracker tracker(this, false);
|
|
state.mOverflowTracker = &tracker;
|
|
|
|
// Drain & handle pushed floats
|
|
DrainPushedFloats();
|
|
nsOverflowAreas fcBounds;
|
|
nsReflowStatus fcStatus = NS_FRAME_COMPLETE;
|
|
ReflowPushedFloats(state, fcBounds, fcStatus);
|
|
|
|
// If we're not dirty (which means we'll mark everything dirty later)
|
|
// and our inline-size has changed, mark the lines dirty that we need to
|
|
// mark dirty for a resize reflow.
|
|
if (!(GetStateBits() & NS_FRAME_IS_DIRTY) && reflowInput->IsIResize()) {
|
|
PrepareResizeReflow(state);
|
|
}
|
|
|
|
// The same for percentage text-indent, except conditioned on the
|
|
// parent resizing.
|
|
if (!(GetStateBits() & NS_FRAME_IS_DIRTY) &&
|
|
reflowInput->mCBReflowInput &&
|
|
reflowInput->mCBReflowInput->IsIResize() &&
|
|
reflowInput->mStyleText->mTextIndent.HasPercent() &&
|
|
!mLines.empty()) {
|
|
mLines.front()->MarkDirty();
|
|
}
|
|
|
|
LazyMarkLinesDirty();
|
|
|
|
mState &= ~NS_FRAME_FIRST_REFLOW;
|
|
|
|
// Now reflow...
|
|
ReflowDirtyLines(state);
|
|
|
|
// If we have a next-in-flow, and that next-in-flow has pushed floats from
|
|
// this frame from a previous iteration of reflow, then we should not return
|
|
// a status of NS_FRAME_IS_FULLY_COMPLETE, since we actually have overflow,
|
|
// it's just already been handled.
|
|
|
|
// NOTE: This really shouldn't happen, since we _should_ pull back our floats
|
|
// and reflow them, but just in case it does, this is a safety precaution so
|
|
// we don't end up with a placeholder pointing to frames that have already
|
|
// been deleted as part of removing our next-in-flow.
|
|
// XXXmats maybe this code isn't needed anymore?
|
|
// XXXmats (layout/generic/crashtests/600100.xhtml doesn't crash without it)
|
|
if (NS_FRAME_IS_FULLY_COMPLETE(state.mReflowStatus)) {
|
|
nsBlockFrame* nif = static_cast<nsBlockFrame*>(GetNextInFlow());
|
|
while (nif) {
|
|
if (nif->HasPushedFloatsFromPrevContinuation()) {
|
|
bool oc = nif->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER;
|
|
NS_MergeReflowStatusInto(&state.mReflowStatus,
|
|
oc ? NS_FRAME_OVERFLOW_INCOMPLETE : NS_FRAME_NOT_COMPLETE);
|
|
break;
|
|
}
|
|
|
|
nif = static_cast<nsBlockFrame*>(nif->GetNextInFlow());
|
|
}
|
|
}
|
|
|
|
NS_MergeReflowStatusInto(&state.mReflowStatus, ocStatus);
|
|
NS_MergeReflowStatusInto(&state.mReflowStatus, fcStatus);
|
|
|
|
// If we end in a BR with clear and affected floats continue,
|
|
// we need to continue, too.
|
|
if (NS_UNCONSTRAINEDSIZE != reflowInput->AvailableBSize() &&
|
|
NS_FRAME_IS_COMPLETE(state.mReflowStatus) &&
|
|
state.mFloatManager->ClearContinues(FindTrailingClear())) {
|
|
NS_FRAME_SET_INCOMPLETE(state.mReflowStatus);
|
|
}
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(state.mReflowStatus)) {
|
|
if (HasOverflowLines() || HasPushedFloats()) {
|
|
state.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
#ifdef DEBUG_kipp
|
|
ListTag(stdout); printf(": block is not fully complete\n");
|
|
#endif
|
|
}
|
|
|
|
// Place the "marker" (bullet) frame if it is placed next to a block
|
|
// child.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. It's only placed on the second line in a
|
|
// rare case: an empty first line followed by a second line that
|
|
// contains a block (example: <LI>\n<P>... ). This is where
|
|
// the second case can happen.
|
|
if (HasOutsideBullet() && !mLines.empty() &&
|
|
(mLines.front()->IsBlock() ||
|
|
(0 == mLines.front()->BSize() &&
|
|
mLines.front() != mLines.back() &&
|
|
mLines.begin().next()->IsBlock()))) {
|
|
// Reflow the bullet
|
|
ReflowOutput reflowOutput(aReflowInput);
|
|
// XXX Use the entire line when we fix bug 25888.
|
|
nsLayoutUtils::LinePosition position;
|
|
WritingMode wm = aReflowInput.GetWritingMode();
|
|
bool havePosition = nsLayoutUtils::GetFirstLinePosition(wm, this,
|
|
&position);
|
|
nscoord lineBStart = havePosition ?
|
|
position.mBStart :
|
|
reflowInput->ComputedLogicalBorderPadding().BStart(wm);
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
ReflowBullet(bullet, state, reflowOutput, lineBStart);
|
|
NS_ASSERTION(!BulletIsEmpty() || reflowOutput.BSize(wm) == 0,
|
|
"empty bullet took up space");
|
|
|
|
if (havePosition && !BulletIsEmpty()) {
|
|
// We have some lines to align the bullet with.
|
|
|
|
// Doing the alignment using the baseline will also cater for
|
|
// bullets that are placed next to a child block (bug 92896)
|
|
|
|
// Tall bullets won't look particularly nice here...
|
|
LogicalRect bbox = bullet->GetLogicalRect(wm, reflowOutput.PhysicalSize());
|
|
bbox.BStart(wm) = position.mBaseline - reflowOutput.BlockStartAscent();
|
|
bullet->SetRect(wm, bbox, reflowOutput.PhysicalSize());
|
|
}
|
|
// Otherwise just leave the bullet where it is, up against our
|
|
// block-start padding.
|
|
}
|
|
|
|
CheckFloats(state);
|
|
|
|
// Compute our final size
|
|
nscoord blockEndEdgeOfChildren;
|
|
ComputeFinalSize(*reflowInput, state, aMetrics, &blockEndEdgeOfChildren);
|
|
|
|
// If the block direction is right-to-left, we need to update the bounds of
|
|
// lines that were placed relative to mContainerSize during reflow, as
|
|
// we typically do not know the true container size until we've reflowed all
|
|
// its children. So we use a dummy mContainerSize during reflow (see
|
|
// BlockReflowInput's constructor) and then fix up the positions of the
|
|
// lines here, once the final block size is known.
|
|
//
|
|
// Note that writing-mode:vertical-rl is the only case where the block
|
|
// logical direction progresses in a negative physical direction, and
|
|
// therefore block-dir coordinate conversion depends on knowing the width
|
|
// of the coordinate space in order to translate between the logical and
|
|
// physical origins.
|
|
if (wm.IsVerticalRL()) {
|
|
nsSize containerSize = aMetrics.PhysicalSize();
|
|
nscoord deltaX = containerSize.width - state.ContainerSize().width;
|
|
if (deltaX != 0) {
|
|
for (LineIterator line = LinesBegin(), end = LinesEnd();
|
|
line != end; line++) {
|
|
UpdateLineContainerSize(line, containerSize);
|
|
}
|
|
for (nsIFrame* f : mFloats) {
|
|
nsPoint physicalDelta(deltaX, 0);
|
|
f->MovePositionBy(physicalDelta);
|
|
}
|
|
nsFrameList* bulletList = GetOutsideBulletList();
|
|
if (bulletList) {
|
|
nsPoint physicalDelta(deltaX, 0);
|
|
for (nsIFrame* f : *bulletList) {
|
|
f->MovePositionBy(physicalDelta);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsRect areaBounds = nsRect(0, 0, aMetrics.Width(), aMetrics.Height());
|
|
ComputeOverflowAreas(areaBounds, reflowInput->mStyleDisplay,
|
|
blockEndEdgeOfChildren, aMetrics.mOverflowAreas);
|
|
// Factor overflow container child bounds into the overflow area
|
|
aMetrics.mOverflowAreas.UnionWith(ocBounds);
|
|
// Factor pushed float child bounds into the overflow area
|
|
aMetrics.mOverflowAreas.UnionWith(fcBounds);
|
|
|
|
// Let the absolutely positioned container reflow any absolutely positioned
|
|
// child frames that need to be reflowed, e.g., elements with a percentage
|
|
// based width/height
|
|
// We want to do this under either of two conditions:
|
|
// 1. If we didn't do the incremental reflow above.
|
|
// 2. If our size changed.
|
|
// Even though it's the padding edge that's the containing block, we
|
|
// can use our rect (the border edge) since if the border style
|
|
// changed, the reflow would have been targeted at us so we'd satisfy
|
|
// condition 1.
|
|
// XXX checking oldSize is bogus, there are various reasons we might have
|
|
// reflowed but our size might not have been changed to what we
|
|
// asked for (e.g., we ended up being pushed to a new page)
|
|
// When WillReflowAgainForClearance is true, we will reflow again without
|
|
// resetting the size. Because of this, we must not reflow our abs-pos children
|
|
// in that situation --- what we think is our "new size"
|
|
// will not be our real new size. This also happens to be more efficient.
|
|
WritingMode parentWM = aMetrics.GetWritingMode();
|
|
if (HasAbsolutelyPositionedChildren()) {
|
|
nsAbsoluteContainingBlock* absoluteContainer = GetAbsoluteContainingBlock();
|
|
bool haveInterrupt = aPresContext->HasPendingInterrupt();
|
|
if (reflowInput->WillReflowAgainForClearance() ||
|
|
haveInterrupt) {
|
|
// Make sure that when we reflow again we'll actually reflow all the abs
|
|
// pos frames that might conceivably depend on our size (or all of them,
|
|
// if we're dirty right now and interrupted; in that case we also need
|
|
// to mark them all with NS_FRAME_IS_DIRTY). Sadly, we can't do much
|
|
// better than that, because we don't really know what our size will be,
|
|
// and it might in fact not change on the followup reflow!
|
|
if (haveInterrupt && (GetStateBits() & NS_FRAME_IS_DIRTY)) {
|
|
absoluteContainer->MarkAllFramesDirty();
|
|
} else {
|
|
absoluteContainer->MarkSizeDependentFramesDirty();
|
|
}
|
|
} else {
|
|
LogicalSize containingBlockSize =
|
|
CalculateContainingBlockSizeForAbsolutes(parentWM, *reflowInput,
|
|
aMetrics.Size(parentWM));
|
|
|
|
// Mark frames that depend on changes we just made to this frame as dirty:
|
|
// Now we can assume that the padding edge hasn't moved.
|
|
// We need to reflow the absolutes if one of them depends on
|
|
// its placeholder position, or the containing block size in a
|
|
// direction in which the containing block size might have
|
|
// changed.
|
|
|
|
// XXX "width" and "height" in this block will become ISize and BSize
|
|
// when nsAbsoluteContainingBlock is logicalized
|
|
bool cbWidthChanged = aMetrics.Width() != oldSize.width;
|
|
bool isRoot = !GetContent()->GetParent();
|
|
// If isRoot and we have auto height, then we are the initial
|
|
// containing block and the containing block height is the
|
|
// viewport height, which can't change during incremental
|
|
// reflow.
|
|
bool cbHeightChanged =
|
|
!(isRoot && NS_UNCONSTRAINEDSIZE == reflowInput->ComputedHeight()) &&
|
|
aMetrics.Height() != oldSize.height;
|
|
|
|
nsRect containingBlock(nsPoint(0, 0),
|
|
containingBlockSize.GetPhysicalSize(parentWM));
|
|
AbsPosReflowFlags flags = AbsPosReflowFlags::eConstrainHeight;
|
|
if (cbWidthChanged) {
|
|
flags |= AbsPosReflowFlags::eCBWidthChanged;
|
|
}
|
|
if (cbHeightChanged) {
|
|
flags |= AbsPosReflowFlags::eCBHeightChanged;
|
|
}
|
|
// Setup the line cursor here to optimize line searching for
|
|
// calculating hypothetical position of absolutely-positioned
|
|
// frames. The line cursor is immediately cleared afterward to
|
|
// avoid affecting the display list generation.
|
|
AutoLineCursorSetup autoLineCursor(this);
|
|
absoluteContainer->Reflow(this, aPresContext, *reflowInput,
|
|
state.mReflowStatus,
|
|
containingBlock, flags,
|
|
&aMetrics.mOverflowAreas);
|
|
}
|
|
}
|
|
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
// Clear the float manager pointer in the block reflow state so we
|
|
// don't waste time translating the coordinate system back on a dead
|
|
// float manager.
|
|
if (needFloatManager)
|
|
state.mFloatManager = nullptr;
|
|
|
|
aStatus = state.mReflowStatus;
|
|
|
|
#ifdef DEBUG
|
|
// Between when we drain pushed floats and when we complete reflow,
|
|
// we're allowed to have multiple continuations of the same float on
|
|
// our floats list, since a first-in-flow might get pushed to a later
|
|
// continuation of its containing block. But it's not permitted
|
|
// outside that time.
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(this, mFloats);
|
|
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
|
|
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
|
|
aMetrics.ISize(parentWM), aMetrics.BSize(parentWM),
|
|
aMetrics.mCarriedOutBEndMargin.get());
|
|
if (HasOverflowAreas()) {
|
|
printf(" overflow-vis={%d,%d,%d,%d}",
|
|
aMetrics.VisualOverflow().x,
|
|
aMetrics.VisualOverflow().y,
|
|
aMetrics.VisualOverflow().width,
|
|
aMetrics.VisualOverflow().height);
|
|
printf(" overflow-scr={%d,%d,%d,%d}",
|
|
aMetrics.ScrollableOverflow().x,
|
|
aMetrics.ScrollableOverflow().y,
|
|
aMetrics.ScrollableOverflow().width,
|
|
aMetrics.ScrollableOverflow().height);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
if (gLameReflowMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
int32_t ectc = nsLineBox::GetCtorCount();
|
|
int32_t numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime delta, perLineDelta, lines;
|
|
lines = int64_t(numLines);
|
|
delta = end - start;
|
|
perLineDelta = delta / lines;
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
SprintfLiteral(buf,
|
|
": %" PRId64 " elapsed (%" PRId64 " per line) (%d lines; %d new lines)",
|
|
delta, perLineDelta, numLines, ectc - ctc);
|
|
printf("%s\n", buf);
|
|
}
|
|
#endif
|
|
|
|
NS_FRAME_SET_TRUNCATION(aStatus, (*reflowInput), aMetrics);
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::CheckForCollapsedBEndMarginFromClearanceLine()
|
|
{
|
|
LineIterator begin = LinesBegin();
|
|
LineIterator line = LinesEnd();
|
|
|
|
while (true) {
|
|
if (begin == line) {
|
|
return false;
|
|
}
|
|
--line;
|
|
if (line->BSize() != 0 || !line->CachedIsEmpty()) {
|
|
return false;
|
|
}
|
|
if (line->HasClearance()) {
|
|
return true;
|
|
}
|
|
}
|
|
// not reached
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeFinalSize(const ReflowInput& aReflowInput,
|
|
BlockReflowInput& aState,
|
|
ReflowOutput& aMetrics,
|
|
nscoord* aBEndEdgeOfChildren)
|
|
{
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
const LogicalMargin& borderPadding = aState.BorderPadding();
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": mBCoord=%d mIsBEndMarginRoot=%s mPrevBEndMargin=%d bp=%d,%d\n",
|
|
aState.mBCoord, aState.mFlags.mIsBEndMarginRoot ? "yes" : "no",
|
|
aState.mPrevBEndMargin.get(),
|
|
borderPadding.BStart(wm), borderPadding.BEnd(wm));
|
|
#endif
|
|
|
|
// Compute final inline size
|
|
LogicalSize finalSize(wm);
|
|
finalSize.ISize(wm) =
|
|
NSCoordSaturatingAdd(NSCoordSaturatingAdd(borderPadding.IStart(wm),
|
|
aReflowInput.ComputedISize()),
|
|
borderPadding.IEnd(wm));
|
|
|
|
// Return block-end margin information
|
|
// rbs says he hit this assertion occasionally (see bug 86947), so
|
|
// just set the margin to zero and we'll figure out why later
|
|
//NS_ASSERTION(aMetrics.mCarriedOutBEndMargin.IsZero(),
|
|
// "someone else set the margin");
|
|
nscoord nonCarriedOutBDirMargin = 0;
|
|
if (!aState.mFlags.mIsBEndMarginRoot) {
|
|
// Apply rule from CSS 2.1 section 8.3.1. If we have some empty
|
|
// line with clearance and a non-zero block-start margin and all
|
|
// subsequent lines are empty, then we do not allow our children's
|
|
// carried out block-end margin to be carried out of us and collapse
|
|
// with our own block-end margin.
|
|
if (CheckForCollapsedBEndMarginFromClearanceLine()) {
|
|
// Convert the children's carried out margin to something that
|
|
// we will include in our height
|
|
nonCarriedOutBDirMargin = aState.mPrevBEndMargin.get();
|
|
aState.mPrevBEndMargin.Zero();
|
|
}
|
|
aMetrics.mCarriedOutBEndMargin = aState.mPrevBEndMargin;
|
|
} else {
|
|
aMetrics.mCarriedOutBEndMargin.Zero();
|
|
}
|
|
|
|
nscoord blockEndEdgeOfChildren = aState.mBCoord + nonCarriedOutBDirMargin;
|
|
// Shrink wrap our height around our contents.
|
|
if (aState.mFlags.mIsBEndMarginRoot ||
|
|
NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedBSize()) {
|
|
// When we are a block-end-margin root make sure that our last
|
|
// childs block-end margin is fully applied. We also do this when
|
|
// we have a computed height, since in that case the carried out
|
|
// margin is not going to be applied anywhere, so we should note it
|
|
// here to be included in the overflow area.
|
|
// Apply the margin only if there's space for it.
|
|
if (blockEndEdgeOfChildren < aState.mReflowInput.AvailableBSize())
|
|
{
|
|
// Truncate block-end margin if it doesn't fit to our available BSize.
|
|
blockEndEdgeOfChildren =
|
|
std::min(blockEndEdgeOfChildren + aState.mPrevBEndMargin.get(),
|
|
aState.mReflowInput.AvailableBSize());
|
|
}
|
|
}
|
|
if (aState.mFlags.mBlockNeedsFloatManager) {
|
|
// Include the float manager's state to properly account for the
|
|
// block-end margin of any floated elements; e.g., inside a table cell.
|
|
nscoord floatHeight =
|
|
aState.ClearFloats(blockEndEdgeOfChildren, StyleClear::Both,
|
|
nullptr, nsFloatManager::DONT_CLEAR_PUSHED_FLOATS);
|
|
blockEndEdgeOfChildren = std::max(blockEndEdgeOfChildren, floatHeight);
|
|
}
|
|
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedBSize()
|
|
&& (GetParent()->GetType() != nsGkAtoms::columnSetFrame ||
|
|
aReflowInput.mParentReflowInput->AvailableBSize() == NS_UNCONSTRAINEDSIZE)) {
|
|
ComputeFinalBSize(aReflowInput, &aState.mReflowStatus,
|
|
aState.mBCoord + nonCarriedOutBDirMargin,
|
|
borderPadding, finalSize, aState.mConsumedBSize);
|
|
if (!NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
// Use the current height; continuations will take up the rest.
|
|
// Do extend the height to at least consume the available
|
|
// height, otherwise our left/right borders (for example) won't
|
|
// extend all the way to the break.
|
|
finalSize.BSize(wm) = std::max(aReflowInput.AvailableBSize(),
|
|
aState.mBCoord + nonCarriedOutBDirMargin);
|
|
// ... but don't take up more block size than is available
|
|
nscoord effectiveComputedBSize =
|
|
GetEffectiveComputedBSize(aReflowInput, aState.GetConsumedBSize());
|
|
finalSize.BSize(wm) =
|
|
std::min(finalSize.BSize(wm),
|
|
borderPadding.BStart(wm) + effectiveComputedBSize);
|
|
// XXX It's pretty wrong that our bottom border still gets drawn on
|
|
// on its own on the last-in-flow, even if we ran out of height
|
|
// here. We need GetSkipSides to check whether we ran out of content
|
|
// height in the current frame, not whether it's last-in-flow.
|
|
}
|
|
|
|
// Don't carry out a block-end margin when our BSize is fixed.
|
|
aMetrics.mCarriedOutBEndMargin.Zero();
|
|
}
|
|
else if (NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
nscoord contentBSize = blockEndEdgeOfChildren - borderPadding.BStart(wm);
|
|
nscoord autoBSize = aReflowInput.ApplyMinMaxBSize(contentBSize);
|
|
if (autoBSize != contentBSize) {
|
|
// Our min- or max-bsize value made our bsize change. Don't carry out
|
|
// our kids' block-end margins.
|
|
aMetrics.mCarriedOutBEndMargin.Zero();
|
|
}
|
|
autoBSize += borderPadding.BStart(wm) + borderPadding.BEnd(wm);
|
|
finalSize.BSize(wm) = autoBSize;
|
|
}
|
|
else {
|
|
NS_ASSERTION(aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE,
|
|
"Shouldn't be incomplete if availableBSize is UNCONSTRAINED.");
|
|
finalSize.BSize(wm) = std::max(aState.mBCoord,
|
|
aReflowInput.AvailableBSize());
|
|
if (aReflowInput.AvailableBSize() == NS_UNCONSTRAINEDSIZE) {
|
|
// This should never happen, but it does. See bug 414255
|
|
finalSize.BSize(wm) = aState.mBCoord;
|
|
}
|
|
}
|
|
|
|
if (IS_TRUE_OVERFLOW_CONTAINER(this)) {
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)) {
|
|
// Overflow containers can only be overflow complete.
|
|
// Note that auto height overflow containers have no normal children
|
|
NS_ASSERTION(finalSize.BSize(wm) == 0,
|
|
"overflow containers must be zero-block-size");
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
} else if (aReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
|
|
!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus) &&
|
|
NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
// Currently only used for grid items, but could be used in other contexts.
|
|
// The FragStretchBSizeProperty is our expected non-fragmented block-size
|
|
// we should stretch to (for align-self:stretch etc). In some fragmentation
|
|
// cases though, the last fragment (this frame since we're complete), needs
|
|
// to have extra size applied because earlier fragments consumed too much of
|
|
// our computed size due to overflowing their containing block. (E.g. this
|
|
// ensures we fill the last row when a multi-row grid item is fragmented).
|
|
bool found;
|
|
nscoord bSize = GetProperty(FragStretchBSizeProperty(), &found);
|
|
if (found) {
|
|
finalSize.BSize(wm) = std::max(bSize, finalSize.BSize(wm));
|
|
}
|
|
}
|
|
|
|
// Clamp the content size to fit within the margin-box clamp size, if any.
|
|
if (MOZ_UNLIKELY(aReflowInput.mFlags.mBClampMarginBoxMinSize) &&
|
|
NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
bool found;
|
|
nscoord cbSize = GetProperty(BClampMarginBoxMinSizeProperty(), &found);
|
|
if (found) {
|
|
auto marginBoxBSize = finalSize.BSize(wm) +
|
|
aReflowInput.ComputedLogicalMargin().BStartEnd(wm);
|
|
auto overflow = marginBoxBSize - cbSize;
|
|
if (overflow > 0) {
|
|
auto contentBSize = finalSize.BSize(wm) - borderPadding.BStartEnd(wm);
|
|
auto newContentBSize = std::max(nscoord(0), contentBSize - overflow);
|
|
// XXXmats deal with percentages better somehow?
|
|
finalSize.BSize(wm) -= contentBSize - newContentBSize;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Screen out negative block sizes --- can happen due to integer overflows :-(
|
|
finalSize.BSize(wm) = std::max(0, finalSize.BSize(wm));
|
|
*aBEndEdgeOfChildren = blockEndEdgeOfChildren;
|
|
|
|
if (blockEndEdgeOfChildren != finalSize.BSize(wm) - borderPadding.BEnd(wm)) {
|
|
SetProperty(BlockEndEdgeOfChildrenProperty(), blockEndEdgeOfChildren);
|
|
} else {
|
|
DeleteProperty(BlockEndEdgeOfChildrenProperty());
|
|
}
|
|
|
|
aMetrics.SetSize(wm, finalSize);
|
|
|
|
#ifdef DEBUG_blocks
|
|
if ((CRAZY_SIZE(aMetrics.Width()) || CRAZY_SIZE(aMetrics.Height())) &&
|
|
!GetParent()->IsCrazySizeAssertSuppressed()) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: desired:%d,%d\n", aMetrics.Width(), aMetrics.Height());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
ConsiderBlockEndEdgeOfChildren(const WritingMode aWritingMode,
|
|
nscoord aBEndEdgeOfChildren,
|
|
nsOverflowAreas& aOverflowAreas)
|
|
{
|
|
// Factor in the block-end edge of the children. Child frames will be added
|
|
// to the overflow area as we iterate through the lines, but their margins
|
|
// won't, so we need to account for block-end margins here.
|
|
// REVIEW: For now, we do this for both visual and scrollable area,
|
|
// although when we make scrollable overflow area not be a subset of
|
|
// visual, we can change this.
|
|
// XXX Currently, overflow areas are stored as physical rects, so we have
|
|
// to handle writing modes explicitly here. If we change overflow rects
|
|
// to be stored logically, this can be simplified again.
|
|
if (aWritingMode.IsVertical()) {
|
|
if (aWritingMode.IsVerticalLR()) {
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect& o = aOverflowAreas.Overflow(otype);
|
|
o.width = std::max(o.XMost(), aBEndEdgeOfChildren) - o.x;
|
|
}
|
|
} else {
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect& o = aOverflowAreas.Overflow(otype);
|
|
nscoord xmost = o.XMost();
|
|
o.x = std::min(o.x, xmost - aBEndEdgeOfChildren);
|
|
o.width = xmost - o.x;
|
|
}
|
|
}
|
|
} else {
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect& o = aOverflowAreas.Overflow(otype);
|
|
o.height = std::max(o.YMost(), aBEndEdgeOfChildren) - o.y;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeOverflowAreas(const nsRect& aBounds,
|
|
const nsStyleDisplay* aDisplay,
|
|
nscoord aBEndEdgeOfChildren,
|
|
nsOverflowAreas& aOverflowAreas)
|
|
{
|
|
// Compute the overflow areas of our children
|
|
// XXX_perf: This can be done incrementally. It is currently one of
|
|
// the things that makes incremental reflow O(N^2).
|
|
nsOverflowAreas areas(aBounds, aBounds);
|
|
if (!ShouldApplyOverflowClipping(this, aDisplay)) {
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line) {
|
|
areas.UnionWith(line->GetOverflowAreas());
|
|
}
|
|
|
|
// Factor an outside bullet in; normally the bullet will be factored into
|
|
// the line-box's overflow areas. However, if the line is a block
|
|
// line then it won't; if there are no lines, it won't. So just
|
|
// factor it in anyway (it can't hurt if it was already done).
|
|
// XXXldb Can we just fix GetOverflowArea instead?
|
|
nsIFrame* outsideBullet = GetOutsideBullet();
|
|
if (outsideBullet) {
|
|
areas.UnionAllWith(outsideBullet->GetRect());
|
|
}
|
|
|
|
ConsiderBlockEndEdgeOfChildren(GetWritingMode(),
|
|
aBEndEdgeOfChildren, areas);
|
|
}
|
|
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
const nsRect& vis = areas.VisualOverflow();
|
|
printf(": VisualOverflowArea CA=%d,%d,%d,%d\n", vis.x, vis.y, vis.width, vis.height);
|
|
const nsRect& scr = areas.ScrollableOverflow();
|
|
printf(": ScrollableOverflowArea CA=%d,%d,%d,%d\n", scr.x, scr.y, scr.width, scr.height);
|
|
#endif
|
|
|
|
aOverflowAreas = areas;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::UnionChildOverflow(nsOverflowAreas& aOverflowAreas)
|
|
{
|
|
// We need to update the overflow areas of lines manually, as they
|
|
// get cached and re-used otherwise. Lines aren't exposed as normal
|
|
// frame children, so calling UnionChildOverflow alone will end up
|
|
// using the old cached values.
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line) {
|
|
nsRect bounds = line->GetPhysicalBounds();
|
|
nsOverflowAreas lineAreas(bounds, bounds);
|
|
|
|
int32_t n = line->GetChildCount();
|
|
for (nsIFrame* lineFrame = line->mFirstChild;
|
|
n > 0; lineFrame = lineFrame->GetNextSibling(), --n) {
|
|
ConsiderChildOverflow(lineAreas, lineFrame);
|
|
}
|
|
|
|
// Consider the overflow areas of the floats attached to the line as well
|
|
if (line->HasFloats()) {
|
|
for (nsFloatCache* fc = line->GetFirstFloat(); fc; fc = fc->Next()) {
|
|
ConsiderChildOverflow(lineAreas, fc->mFloat);
|
|
}
|
|
}
|
|
|
|
line->SetOverflowAreas(lineAreas);
|
|
aOverflowAreas.UnionWith(lineAreas);
|
|
}
|
|
|
|
// Union with child frames, skipping the principal and float lists
|
|
// since we already handled those using the line boxes.
|
|
nsLayoutUtils::UnionChildOverflow(this, aOverflowAreas,
|
|
kPrincipalList | kFloatList);
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas)
|
|
{
|
|
bool found;
|
|
nscoord blockEndEdgeOfChildren =
|
|
GetProperty(BlockEndEdgeOfChildrenProperty(), &found);
|
|
if (found) {
|
|
ConsiderBlockEndEdgeOfChildren(GetWritingMode(),
|
|
blockEndEdgeOfChildren, aOverflowAreas);
|
|
}
|
|
|
|
// Line cursor invariants depend on the overflow areas of the lines, so
|
|
// we must clear the line cursor since those areas may have changed.
|
|
ClearLineCursor();
|
|
return nsContainerFrame::ComputeCustomOverflow(aOverflowAreas);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::LazyMarkLinesDirty()
|
|
{
|
|
if (GetStateBits() & NS_BLOCK_LOOK_FOR_DIRTY_FRAMES) {
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end; ++line) {
|
|
int32_t n = line->GetChildCount();
|
|
for (nsIFrame* lineFrame = line->mFirstChild;
|
|
n > 0; lineFrame = lineFrame->GetNextSibling(), --n) {
|
|
if (NS_SUBTREE_DIRTY(lineFrame)) {
|
|
// NOTE: MarkLineDirty does more than just marking the line dirty.
|
|
MarkLineDirty(line, &mLines);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
RemoveStateBits(NS_BLOCK_LOOK_FOR_DIRTY_FRAMES);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MarkLineDirty(LineIterator aLine, const nsLineList* aLineList)
|
|
{
|
|
// Mark aLine dirty
|
|
aLine->MarkDirty();
|
|
aLine->SetInvalidateTextRuns(true);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark line %p dirty\n", static_cast<void*>(aLine.get()));
|
|
}
|
|
#endif
|
|
|
|
// Mark previous line dirty if it's an inline line so that it can
|
|
// maybe pullup something from the line just affected.
|
|
// XXX We don't need to do this if aPrevLine ends in a break-after...
|
|
if (aLine != aLineList->front() && aLine->IsInline() &&
|
|
aLine.prev()->IsInline()) {
|
|
aLine.prev()->MarkDirty();
|
|
aLine.prev()->SetInvalidateTextRuns(true);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark prev-line %p dirty\n",
|
|
static_cast<void*>(aLine.prev().get()));
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Test whether lines are certain to be aligned left so that we can make
|
|
* resizing optimizations
|
|
*/
|
|
static inline bool
|
|
IsAlignedLeft(uint8_t aAlignment,
|
|
uint8_t aDirection,
|
|
uint8_t aUnicodeBidi,
|
|
nsIFrame* aFrame)
|
|
{
|
|
return aFrame->IsSVGText() ||
|
|
NS_STYLE_TEXT_ALIGN_LEFT == aAlignment ||
|
|
(((NS_STYLE_TEXT_ALIGN_START == aAlignment &&
|
|
NS_STYLE_DIRECTION_LTR == aDirection) ||
|
|
(NS_STYLE_TEXT_ALIGN_END == aAlignment &&
|
|
NS_STYLE_DIRECTION_RTL == aDirection)) &&
|
|
!(NS_STYLE_UNICODE_BIDI_PLAINTEXT & aUnicodeBidi));
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PrepareResizeReflow(BlockReflowInput& aState)
|
|
{
|
|
// See if we can try and avoid marking all the lines as dirty
|
|
bool tryAndSkipLines =
|
|
// The left content-edge must be a constant distance from the left
|
|
// border-edge.
|
|
!StylePadding()->mPadding.GetLeft().HasPercent();
|
|
|
|
#ifdef DEBUG
|
|
if (gDisableResizeOpt) {
|
|
tryAndSkipLines = false;
|
|
}
|
|
if (gNoisyReflow) {
|
|
if (!tryAndSkipLines) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": marking all lines dirty: availISize=%d\n",
|
|
aState.mReflowInput.AvailableISize());
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (tryAndSkipLines) {
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
nscoord newAvailISize =
|
|
aState.mReflowInput.ComputedLogicalBorderPadding().IStart(wm) +
|
|
aState.mReflowInput.ComputedISize();
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowInput.ComputedLogicalBorderPadding().IStart(wm) &&
|
|
NS_UNCONSTRAINEDSIZE != aState.mReflowInput.ComputedISize(),
|
|
"math on NS_UNCONSTRAINEDSIZE");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": trying to avoid marking all lines dirty\n");
|
|
}
|
|
#endif
|
|
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
// We let child blocks make their own decisions the same
|
|
// way we are here.
|
|
bool isLastLine = line == mLines.back() && !GetNextInFlow();
|
|
if (line->IsBlock() ||
|
|
line->HasFloats() ||
|
|
(!isLastLine && !line->HasBreakAfter()) ||
|
|
((isLastLine || !line->IsLineWrapped())) ||
|
|
line->ResizeReflowOptimizationDisabled() ||
|
|
line->IsImpactedByFloat() ||
|
|
(line->IEnd() > newAvailISize)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
if (!line->IsBlock()) {
|
|
printf("PrepareResizeReflow thinks line %p is %simpacted by floats\n",
|
|
line.get(), line->IsImpactedByFloat() ? "" : "not ");
|
|
}
|
|
#endif
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow && !line->IsDirty()) {
|
|
IndentBy(stdout, gNoiseIndent + 1);
|
|
printf("skipped: line=%p next=%p %s %s%s%s breakTypeBefore/After=%s/%s xmost=%d\n",
|
|
static_cast<void*>(line.get()),
|
|
static_cast<void*>((line.next() != LinesEnd() ? line.next().get() : nullptr)),
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->HasBreakAfter() ? "has-break-after " : "",
|
|
line->HasFloats() ? "has-floats " : "",
|
|
line->IsImpactedByFloat() ? "impacted " : "",
|
|
line->BreakTypeToString(line->GetBreakTypeBefore()),
|
|
line->BreakTypeToString(line->GetBreakTypeAfter()),
|
|
line->IEnd());
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
else {
|
|
// Mark everything dirty
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
/**
|
|
* Propagate reflow "damage" from from earlier lines to the current
|
|
* line. The reflow damage comes from the following sources:
|
|
* 1. The regions of float damage remembered during reflow.
|
|
* 2. The combination of nonzero |aDeltaBCoord| and any impact by a
|
|
* float, either the previous reflow or now.
|
|
*
|
|
* When entering this function, |aLine| is still at its old position and
|
|
* |aDeltaBCoord| indicates how much it will later be slid (assuming it
|
|
* doesn't get marked dirty and reflowed entirely).
|
|
*/
|
|
void
|
|
nsBlockFrame::PropagateFloatDamage(BlockReflowInput& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaBCoord)
|
|
{
|
|
nsFloatManager *floatManager = aState.mReflowInput.mFloatManager;
|
|
NS_ASSERTION((aState.mReflowInput.mParentReflowInput &&
|
|
aState.mReflowInput.mParentReflowInput->mFloatManager == floatManager) ||
|
|
aState.mReflowInput.mBlockDelta == 0, "Bad block delta passed in");
|
|
|
|
// Check to see if there are any floats; if there aren't, there can't
|
|
// be any float damage
|
|
if (!floatManager->HasAnyFloats())
|
|
return;
|
|
|
|
// Check the damage region recorded in the float damage.
|
|
if (floatManager->HasFloatDamage()) {
|
|
// Need to check mBounds *and* mCombinedArea to find intersections
|
|
// with aLine's floats
|
|
nscoord lineBCoordBefore = aLine->BStart() + aDeltaBCoord;
|
|
nscoord lineBCoordAfter = lineBCoordBefore + aLine->BSize();
|
|
// Scrollable overflow should be sufficient for things that affect
|
|
// layout.
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
nsSize containerSize = aState.ContainerSize();
|
|
LogicalRect overflow = aLine->GetOverflowArea(eScrollableOverflow, wm,
|
|
containerSize);
|
|
nscoord lineBCoordCombinedBefore = overflow.BStart(wm) + aDeltaBCoord;
|
|
nscoord lineBCoordCombinedAfter = lineBCoordCombinedBefore +
|
|
overflow.BSize(wm);
|
|
|
|
bool isDirty = floatManager->IntersectsDamage(lineBCoordBefore,
|
|
lineBCoordAfter) ||
|
|
floatManager->IntersectsDamage(lineBCoordCombinedBefore,
|
|
lineBCoordCombinedAfter);
|
|
if (isDirty) {
|
|
aLine->MarkDirty();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Check if the line is moving relative to the float manager
|
|
if (aDeltaBCoord + aState.mReflowInput.mBlockDelta != 0) {
|
|
if (aLine->IsBlock()) {
|
|
// Unconditionally reflow sliding blocks; we only really need to reflow
|
|
// if there's a float impacting this block, but the current float manager
|
|
// makes it difficult to check that. Therefore, we let the child block
|
|
// decide what it needs to reflow.
|
|
aLine->MarkDirty();
|
|
} else {
|
|
bool wasImpactedByFloat = aLine->IsImpactedByFloat();
|
|
nsFlowAreaRect floatAvailableSpace =
|
|
aState.GetFloatAvailableSpaceForBSize(aLine->BStart() + aDeltaBCoord,
|
|
aLine->BSize(),
|
|
nullptr);
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::PropagateFloatDamage %p was = %d, is=%d\n",
|
|
this, wasImpactedByFloat, floatAvailableSpace.mHasFloats);
|
|
#endif
|
|
|
|
// Mark the line dirty if it was or is affected by a float
|
|
// We actually only really need to reflow if the amount of impact
|
|
// changes, but that's not straightforward to check
|
|
if (wasImpactedByFloat || floatAvailableSpace.mHasFloats) {
|
|
aLine->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static bool LineHasClear(nsLineBox* aLine) {
|
|
return aLine->IsBlock()
|
|
? (aLine->GetBreakTypeBefore() != StyleClear::None ||
|
|
(aLine->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN) ||
|
|
!nsBlockFrame::BlockCanIntersectFloats(aLine->mFirstChild))
|
|
: aLine->HasFloatBreakAfter();
|
|
}
|
|
|
|
|
|
/**
|
|
* Reparent a whole list of floats from aOldParent to this block. The
|
|
* floats might be taken from aOldParent's overflow list. They will be
|
|
* removed from the list. They end up appended to our mFloats list.
|
|
*/
|
|
void
|
|
nsBlockFrame::ReparentFloats(nsIFrame* aFirstFrame, nsBlockFrame* aOldParent,
|
|
bool aReparentSiblings) {
|
|
nsFrameList list;
|
|
aOldParent->CollectFloats(aFirstFrame, list, aReparentSiblings);
|
|
if (list.NotEmpty()) {
|
|
for (nsIFrame* f : list) {
|
|
MOZ_ASSERT(!(f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"CollectFloats should've removed that bit");
|
|
ReparentFrame(f, aOldParent, this);
|
|
}
|
|
mFloats.AppendFrames(nullptr, list);
|
|
}
|
|
}
|
|
|
|
static void DumpLine(const BlockReflowInput& aState, nsLineBox* aLine,
|
|
nscoord aDeltaBCoord, int32_t aDeltaIndent) {
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyReflow) {
|
|
nsRect ovis(aLine->GetVisualOverflowArea());
|
|
nsRect oscr(aLine->GetScrollableOverflowArea());
|
|
nsBlockFrame::IndentBy(stdout, nsBlockFrame::gNoiseIndent + aDeltaIndent);
|
|
printf("line=%p mBCoord=%d dirty=%s oldBounds={%d,%d,%d,%d} oldoverflow-vis={%d,%d,%d,%d} oldoverflow-scr={%d,%d,%d,%d} deltaBCoord=%d mPrevBEndMargin=%d childCount=%d\n",
|
|
static_cast<void*>(aLine), aState.mBCoord,
|
|
aLine->IsDirty() ? "yes" : "no",
|
|
aLine->IStart(), aLine->BStart(),
|
|
aLine->ISize(), aLine->BSize(),
|
|
ovis.x, ovis.y, ovis.width, ovis.height,
|
|
oscr.x, oscr.y, oscr.width, oscr.height,
|
|
aDeltaBCoord, aState.mPrevBEndMargin.get(), aLine->GetChildCount());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowDirtyLines(BlockReflowInput& aState)
|
|
{
|
|
bool keepGoing = true;
|
|
bool repositionViews = false; // should we really need this?
|
|
bool foundAnyClears = aState.mFloatBreakType != StyleClear::None;
|
|
bool willReflowAgain = false;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": reflowing dirty lines");
|
|
printf(" computedISize=%d\n", aState.mReflowInput.ComputedISize());
|
|
}
|
|
AutoNoisyIndenter indent(gNoisyReflow);
|
|
#endif
|
|
|
|
bool selfDirty = (GetStateBits() & NS_FRAME_IS_DIRTY) ||
|
|
(aState.mReflowInput.IsBResize() &&
|
|
(GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_BSIZE));
|
|
|
|
// Reflow our last line if our availableBSize has increased
|
|
// so that we (and our last child) pull up content as necessary
|
|
if (aState.mReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE
|
|
&& GetNextInFlow() && aState.mReflowInput.AvailableBSize() >
|
|
GetLogicalSize().BSize(aState.mReflowInput.GetWritingMode())) {
|
|
LineIterator lastLine = LinesEnd();
|
|
if (lastLine != LinesBegin()) {
|
|
--lastLine;
|
|
lastLine->MarkDirty();
|
|
}
|
|
}
|
|
// the amount by which we will slide the current line if it is not
|
|
// dirty
|
|
nscoord deltaBCoord = 0;
|
|
|
|
// whether we did NOT reflow the previous line and thus we need to
|
|
// recompute the carried out margin before the line if we want to
|
|
// reflow it or if its previous margin is dirty
|
|
bool needToRecoverState = false;
|
|
// Float continuations were reflowed in ReflowPushedFloats
|
|
bool reflowedFloat = mFloats.NotEmpty() &&
|
|
(mFloats.FirstChild()->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT);
|
|
bool lastLineMovedUp = false;
|
|
// We save up information about BR-clearance here
|
|
StyleClear inlineFloatBreakType = aState.mFloatBreakType;
|
|
|
|
LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
|
|
// Reflow the lines that are already ours
|
|
for ( ; line != line_end; ++line, aState.AdvanceToNextLine()) {
|
|
DumpLine(aState, line, deltaBCoord, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
if (selfDirty)
|
|
line->MarkDirty();
|
|
|
|
// This really sucks, but we have to look inside any blocks that have clear
|
|
// elements inside them.
|
|
// XXX what can we do smarter here?
|
|
if (!line->IsDirty() && line->IsBlock() &&
|
|
(line->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
nsIFrame *replacedBlock = nullptr;
|
|
if (line->IsBlock() &&
|
|
!nsBlockFrame::BlockCanIntersectFloats(line->mFirstChild)) {
|
|
replacedBlock = line->mFirstChild;
|
|
}
|
|
|
|
// We have to reflow the line if it's a block whose clearance
|
|
// might have changed, so detect that.
|
|
if (!line->IsDirty() &&
|
|
(line->GetBreakTypeBefore() != StyleClear::None ||
|
|
replacedBlock)) {
|
|
nscoord curBCoord = aState.mBCoord;
|
|
// See where we would be after applying any clearance due to
|
|
// BRs.
|
|
if (inlineFloatBreakType != StyleClear::None) {
|
|
curBCoord = aState.ClearFloats(curBCoord, inlineFloatBreakType);
|
|
}
|
|
|
|
nscoord newBCoord =
|
|
aState.ClearFloats(curBCoord, line->GetBreakTypeBefore(), replacedBlock);
|
|
|
|
if (line->HasClearance()) {
|
|
// Reflow the line if it might not have clearance anymore.
|
|
if (newBCoord == curBCoord
|
|
// aState.mBCoord is the clearance point which should be the
|
|
// block-start border-edge of the block frame. If sliding the
|
|
// block by deltaBCoord isn't going to put it in the predicted
|
|
// position, then we'd better reflow the line.
|
|
|| newBCoord != line->BStart() + deltaBCoord) {
|
|
line->MarkDirty();
|
|
}
|
|
} else {
|
|
// Reflow the line if the line might have clearance now.
|
|
if (curBCoord != newBCoord) {
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
// We might have to reflow a line that is after a clearing BR.
|
|
if (inlineFloatBreakType != StyleClear::None) {
|
|
aState.mBCoord = aState.ClearFloats(aState.mBCoord, inlineFloatBreakType);
|
|
if (aState.mBCoord != line->BStart() + deltaBCoord) {
|
|
// SlideLine is not going to put the line where the clearance
|
|
// put it. Reflow the line to be sure.
|
|
line->MarkDirty();
|
|
}
|
|
inlineFloatBreakType = StyleClear::None;
|
|
}
|
|
|
|
bool previousMarginWasDirty = line->IsPreviousMarginDirty();
|
|
if (previousMarginWasDirty) {
|
|
// If the previous margin is dirty, reflow the current line
|
|
line->MarkDirty();
|
|
line->ClearPreviousMarginDirty();
|
|
} else if (line->BEnd() + deltaBCoord > aState.mBEndEdge) {
|
|
// Lines that aren't dirty but get slid past our height constraint must
|
|
// be reflowed.
|
|
line->MarkDirty();
|
|
}
|
|
|
|
// If we have a constrained height (i.e., breaking columns/pages),
|
|
// and the distance to the bottom might have changed, then we need
|
|
// to reflow any line that might have floats in it, both because the
|
|
// breakpoints within those floats may have changed and because we
|
|
// might have to push/pull the floats in their entirety.
|
|
// FIXME: What about a deltaBCoord or block-size change that forces us to
|
|
// push lines? Why does that work?
|
|
if (!line->IsDirty() &&
|
|
aState.mReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE &&
|
|
(deltaBCoord != 0 || aState.mReflowInput.IsBResize() ||
|
|
aState.mReflowInput.mFlags.mMustReflowPlaceholders) &&
|
|
(line->IsBlock() || line->HasFloats() || line->HadFloatPushed())) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
if (!line->IsDirty()) {
|
|
// See if there's any reflow damage that requires that we mark the
|
|
// line dirty.
|
|
PropagateFloatDamage(aState, line, deltaBCoord);
|
|
}
|
|
|
|
// If the container size has changed, reset mContainerSize. If the
|
|
// line's writing mode is not ltr, or if the line is not left-aligned, also
|
|
// mark the line dirty.
|
|
if (aState.ContainerSize() != line->mContainerSize) {
|
|
line->mContainerSize = aState.ContainerSize();
|
|
|
|
bool isLastLine = line == mLines.back() &&
|
|
!GetNextInFlow() &&
|
|
NS_STYLE_TEXT_ALIGN_AUTO == StyleText()->mTextAlignLast;
|
|
uint8_t align = isLastLine ?
|
|
StyleText()->mTextAlign : StyleText()->mTextAlignLast;
|
|
|
|
if (line->mWritingMode.IsVertical() ||
|
|
!line->mWritingMode.IsBidiLTR() ||
|
|
!IsAlignedLeft(align,
|
|
aState.mReflowInput.mStyleVisibility->mDirection,
|
|
StyleTextReset()->mUnicodeBidi, this)) {
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
|
|
if (needToRecoverState && line->IsDirty()) {
|
|
// We need to reconstruct the block-end margin only if we didn't
|
|
// reflow the previous line and we do need to reflow (or repair
|
|
// the block-start position of) the next line.
|
|
aState.ReconstructMarginBefore(line);
|
|
}
|
|
|
|
bool reflowedPrevLine = !needToRecoverState;
|
|
if (needToRecoverState) {
|
|
needToRecoverState = false;
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// this line.
|
|
if (line->IsDirty()) {
|
|
NS_ASSERTION(line->mFirstChild->GetPrevSibling() ==
|
|
line.prev()->LastChild(), "unexpected line frames");
|
|
aState.mPrevChild = line->mFirstChild->GetPrevSibling();
|
|
}
|
|
}
|
|
|
|
// Now repair the line and update |aState.mBCoord| by calling
|
|
// |ReflowLine| or |SlideLine|.
|
|
// If we're going to reflow everything again, then no need to reflow
|
|
// the dirty line ... unless the line has floats, in which case we'd
|
|
// better reflow it now to refresh its float cache, which may contain
|
|
// dangling frame pointers! Ugh! This reflow of the line may be
|
|
// incorrect because we skipped reflowing previous lines (e.g., floats
|
|
// may be placed incorrectly), but that's OK because we'll mark the
|
|
// line dirty below under "if (aState.mReflowInput.mDiscoveredClearance..."
|
|
if (line->IsDirty() && (line->HasFloats() || !willReflowAgain)) {
|
|
lastLineMovedUp = true;
|
|
|
|
bool maybeReflowingForFirstTime =
|
|
line->IStart() == 0 && line->BStart() == 0 &&
|
|
line->ISize() == 0 && line->BSize() == 0;
|
|
|
|
// Compute the dirty lines "before" BEnd, after factoring in
|
|
// the running deltaBCoord value - the running value is implicit in
|
|
// aState.mBCoord.
|
|
nscoord oldB = line->BStart();
|
|
nscoord oldBMost = line->BEnd();
|
|
|
|
NS_ASSERTION(!willReflowAgain || !line->IsBlock(),
|
|
"Don't reflow blocks while willReflowAgain is true, reflow of block abs-pos children depends on this");
|
|
|
|
// Reflow the dirty line. If it's an incremental reflow, then force
|
|
// it to invalidate the dirty area if necessary
|
|
ReflowLine(aState, line, &keepGoing);
|
|
|
|
if (aState.mReflowInput.WillReflowAgainForClearance()) {
|
|
line->MarkDirty();
|
|
willReflowAgain = true;
|
|
// Note that once we've entered this state, every line that gets here
|
|
// (e.g. because it has floats) gets marked dirty and reflowed again.
|
|
// in the next pass. This is important, see above.
|
|
}
|
|
|
|
if (line->HasFloats()) {
|
|
reflowedFloat = true;
|
|
}
|
|
|
|
if (!keepGoing) {
|
|
DumpLine(aState, line, deltaBCoord, -1);
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Test to see whether the margin that should be carried out
|
|
// to the next line (NL) might have changed. In ReflowBlockFrame
|
|
// we call nextLine->MarkPreviousMarginDirty if the block's
|
|
// actual carried-out block-end margin changed. So here we only
|
|
// need to worry about the following effects:
|
|
// 1) the line was just created, and it might now be blocking
|
|
// a carried-out block-end margin from previous lines that
|
|
// used to reach NL from reaching NL
|
|
// 2) the line used to be empty, and is now not empty,
|
|
// thus blocking a carried-out block-end margin from previous lines
|
|
// that used to reach NL from reaching NL
|
|
// 3) the line wasn't empty, but now is, so a carried-out
|
|
// block-end margin from previous lines that didn't used to reach NL
|
|
// now does
|
|
// 4) the line might have changed in a way that affects NL's
|
|
// ShouldApplyBStartMargin decision. The three things that matter
|
|
// are the line's emptiness, its adjacency to the block-start edge of the
|
|
// block, and whether it has clearance (the latter only matters if the
|
|
// block was and is adjacent to the block-start and empty).
|
|
//
|
|
// If the line is empty now, we can't reliably tell if the line was empty
|
|
// before, so we just assume it was and do nextLine->MarkPreviousMarginDirty.
|
|
// This means the checks in 4) are redundant; if the line is empty now
|
|
// we don't need to check 4), but if the line is not empty now and we're sure
|
|
// it wasn't empty before, any adjacency and clearance changes are irrelevant
|
|
// to the result of nextLine->ShouldApplyBStartMargin.
|
|
if (line.next() != LinesEnd()) {
|
|
bool maybeWasEmpty = oldB == line.next()->BStart();
|
|
bool isEmpty = line->CachedIsEmpty();
|
|
if (maybeReflowingForFirstTime /*1*/ ||
|
|
(isEmpty || maybeWasEmpty) /*2/3/4*/) {
|
|
line.next()->MarkPreviousMarginDirty();
|
|
// since it's marked dirty, nobody will care about |deltaBCoord|
|
|
}
|
|
}
|
|
|
|
// If the line was just reflowed for the first time, then its
|
|
// old mBounds cannot be trusted so this deltaBCoord computation is
|
|
// bogus. But that's OK because we just did
|
|
// MarkPreviousMarginDirty on the next line which will force it
|
|
// to be reflowed, so this computation of deltaBCoord will not be
|
|
// used.
|
|
deltaBCoord = line->BEnd() - oldBMost;
|
|
|
|
// Now do an interrupt check. We want to do this only in the case when we
|
|
// actually reflow the line, so that if we get back in here we'll get
|
|
// further on the reflow before interrupting.
|
|
aState.mPresContext->CheckForInterrupt(this);
|
|
} else {
|
|
aState.mOverflowTracker->Skip(line->mFirstChild, aState.mReflowStatus);
|
|
// Nop except for blocks (we don't create overflow container
|
|
// continuations for any inlines atm), so only checking mFirstChild
|
|
// is enough
|
|
|
|
lastLineMovedUp = deltaBCoord < 0;
|
|
|
|
if (deltaBCoord != 0)
|
|
SlideLine(aState, line, deltaBCoord);
|
|
else
|
|
repositionViews = true;
|
|
|
|
NS_ASSERTION(!line->IsDirty() || !line->HasFloats(),
|
|
"Possibly stale float cache here!");
|
|
if (willReflowAgain && line->IsBlock()) {
|
|
// If we're going to reflow everything again, and this line is a block,
|
|
// then there is no need to recover float state. The line may contain
|
|
// other lines with floats, but in that case RecoverStateFrom would only
|
|
// add floats to the float manager. We don't need to do that because
|
|
// everything's going to get reflowed again "for real". Calling
|
|
// RecoverStateFrom in this situation could be lethal because the
|
|
// block's descendant lines may have float caches containing dangling
|
|
// frame pointers. Ugh!
|
|
// If this line is inline, then we need to recover its state now
|
|
// to make sure that we don't forget to move its floats by deltaBCoord.
|
|
} else {
|
|
// XXX EVIL O(N^2) EVIL
|
|
aState.RecoverStateFrom(line, deltaBCoord);
|
|
}
|
|
|
|
// Keep mBCoord up to date in case we're propagating reflow damage
|
|
// and also because our final height may depend on it. If the
|
|
// line is inlines, then only update mBCoord if the line is not
|
|
// empty, because that's what PlaceLine does. (Empty blocks may
|
|
// want to update mBCoord, e.g. if they have clearance.)
|
|
if (line->IsBlock() || !line->CachedIsEmpty()) {
|
|
aState.mBCoord = line->BEnd();
|
|
}
|
|
|
|
needToRecoverState = true;
|
|
|
|
if (reflowedPrevLine && !line->IsBlock() &&
|
|
aState.mPresContext->HasPendingInterrupt()) {
|
|
// Need to make sure to pull overflows from any prev-in-flows
|
|
for (nsIFrame* inlineKid = line->mFirstChild; inlineKid;
|
|
inlineKid = inlineKid->PrincipalChildList().FirstChild()) {
|
|
inlineKid->PullOverflowsFromPrevInFlow();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Record if we need to clear floats before reflowing the next
|
|
// line. Note that inlineFloatBreakType will be handled and
|
|
// cleared before the next line is processed, so there is no
|
|
// need to combine break types here.
|
|
if (line->HasFloatBreakAfter()) {
|
|
inlineFloatBreakType = line->GetBreakTypeAfter();
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = true;
|
|
}
|
|
|
|
DumpLine(aState, line, deltaBCoord, -1);
|
|
|
|
if (aState.mPresContext->HasPendingInterrupt()) {
|
|
willReflowAgain = true;
|
|
// Another option here might be to leave |line| clean if
|
|
// !HasPendingInterrupt() before the CheckForInterrupt() call, since in
|
|
// that case the line really did reflow as it should have. Not sure
|
|
// whether that would be safe, so doing this for now instead. Also not
|
|
// sure whether we really want to mark all lines dirty after an
|
|
// interrupt, but until we get better at propagating float damage we
|
|
// really do need to do it this way; see comments inside MarkLineDirty.
|
|
MarkLineDirtyForInterrupt(line);
|
|
}
|
|
}
|
|
|
|
// Handle BR-clearance from the last line of the block
|
|
if (inlineFloatBreakType != StyleClear::None) {
|
|
aState.mBCoord = aState.ClearFloats(aState.mBCoord, inlineFloatBreakType);
|
|
}
|
|
|
|
if (needToRecoverState) {
|
|
// Is this expensive?
|
|
aState.ReconstructMarginBefore(line);
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// the last line.
|
|
NS_ASSERTION(line == line_end || line->mFirstChild->GetPrevSibling() ==
|
|
line.prev()->LastChild(), "unexpected line frames");
|
|
aState.mPrevChild =
|
|
line == line_end ? mFrames.LastChild() : line->mFirstChild->GetPrevSibling();
|
|
}
|
|
|
|
// Should we really have to do this?
|
|
if (repositionViews)
|
|
nsContainerFrame::PlaceFrameView(this);
|
|
|
|
// We can skip trying to pull up the next line if our height is constrained
|
|
// (so we can report being incomplete) and there is no next in flow or we
|
|
// were told not to or we know it will be futile, i.e.,
|
|
// -- the next in flow is not changing
|
|
// -- and we cannot have added more space for its first line to be
|
|
// pulled up into,
|
|
// -- it's an incremental reflow of a descendant
|
|
// -- and we didn't reflow any floats (so the available space
|
|
// didn't change)
|
|
// -- my chain of next-in-flows either has no first line, or its first
|
|
// line isn't dirty.
|
|
bool heightConstrained =
|
|
aState.mReflowInput.AvailableBSize() != NS_UNCONSTRAINEDSIZE;
|
|
bool skipPull = willReflowAgain && heightConstrained;
|
|
if (!skipPull && heightConstrained && aState.mNextInFlow &&
|
|
(aState.mReflowInput.mFlags.mNextInFlowUntouched &&
|
|
!lastLineMovedUp &&
|
|
!(GetStateBits() & NS_FRAME_IS_DIRTY) &&
|
|
!reflowedFloat)) {
|
|
// We'll place lineIter at the last line of this block, so that
|
|
// nsBlockInFlowLineIterator::Next() will take us to the first
|
|
// line of my next-in-flow-chain. (But first, check that I
|
|
// have any lines -- if I don't, just bail out of this
|
|
// optimization.)
|
|
LineIterator lineIter = this->LinesEnd();
|
|
if (lineIter != this->LinesBegin()) {
|
|
lineIter--; // I have lines; step back from dummy iterator to last line.
|
|
nsBlockInFlowLineIterator bifLineIter(this, lineIter);
|
|
|
|
// Check for next-in-flow-chain's first line.
|
|
// (First, see if there is such a line, and second, see if it's clean)
|
|
if (!bifLineIter.Next() ||
|
|
!bifLineIter.GetLine()->IsDirty()) {
|
|
skipPull=true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (skipPull && aState.mNextInFlow) {
|
|
NS_ASSERTION(heightConstrained, "Height should be constrained here\n");
|
|
if (IS_TRUE_OVERFLOW_CONTAINER(aState.mNextInFlow))
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
else
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
if (!skipPull && aState.mNextInFlow) {
|
|
// Pull data from a next-in-flow if there's still room for more
|
|
// content here.
|
|
while (keepGoing && aState.mNextInFlow) {
|
|
// Grab first line from our next-in-flow
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
nsLineBox* pulledLine;
|
|
nsFrameList pulledFrames;
|
|
if (!nextInFlow->mLines.empty()) {
|
|
RemoveFirstLine(nextInFlow->mLines, nextInFlow->mFrames,
|
|
&pulledLine, &pulledFrames);
|
|
} else {
|
|
// Grab an overflow line if there are any
|
|
FrameLines* overflowLines = nextInFlow->GetOverflowLines();
|
|
if (!overflowLines) {
|
|
aState.mNextInFlow =
|
|
static_cast<nsBlockFrame*>(nextInFlow->GetNextInFlow());
|
|
continue;
|
|
}
|
|
bool last =
|
|
RemoveFirstLine(overflowLines->mLines, overflowLines->mFrames,
|
|
&pulledLine, &pulledFrames);
|
|
if (last) {
|
|
nextInFlow->DestroyOverflowLines();
|
|
}
|
|
}
|
|
|
|
if (pulledFrames.IsEmpty()) {
|
|
// The line is empty. Try the next one.
|
|
NS_ASSERTION(pulledLine->GetChildCount() == 0 &&
|
|
!pulledLine->mFirstChild, "bad empty line");
|
|
nextInFlow->FreeLineBox(pulledLine);
|
|
continue;
|
|
}
|
|
|
|
if (pulledLine == nextInFlow->GetLineCursor()) {
|
|
nextInFlow->ClearLineCursor();
|
|
}
|
|
ReparentFrames(pulledFrames, nextInFlow, this);
|
|
|
|
NS_ASSERTION(pulledFrames.LastChild() == pulledLine->LastChild(),
|
|
"Unexpected last frame");
|
|
NS_ASSERTION(aState.mPrevChild || mLines.empty(), "should have a prevchild here");
|
|
NS_ASSERTION(aState.mPrevChild == mFrames.LastChild(),
|
|
"Incorrect aState.mPrevChild before inserting line at end");
|
|
|
|
// Shift pulledLine's frames into our mFrames list.
|
|
mFrames.AppendFrames(nullptr, pulledFrames);
|
|
|
|
// Add line to our line list, and set its last child as our new prev-child
|
|
line = mLines.before_insert(LinesEnd(), pulledLine);
|
|
aState.mPrevChild = mFrames.LastChild();
|
|
|
|
// Reparent floats whose placeholders are in the line.
|
|
ReparentFloats(pulledLine->mFirstChild, nextInFlow, true);
|
|
|
|
DumpLine(aState, pulledLine, deltaBCoord, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
if (aState.mPresContext->HasPendingInterrupt()) {
|
|
MarkLineDirtyForInterrupt(line);
|
|
} else {
|
|
// Now reflow it and any lines that it makes during it's reflow
|
|
// (we have to loop here because reflowing the line may cause a new
|
|
// line to be created; see SplitLine's callers for examples of
|
|
// when this happens).
|
|
while (line != LinesEnd()) {
|
|
ReflowLine(aState, line, &keepGoing);
|
|
|
|
if (aState.mReflowInput.WillReflowAgainForClearance()) {
|
|
line->MarkDirty();
|
|
keepGoing = false;
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
break;
|
|
}
|
|
|
|
DumpLine(aState, line, deltaBCoord, -1);
|
|
if (!keepGoing) {
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = true;
|
|
}
|
|
|
|
if (aState.mPresContext->CheckForInterrupt(this)) {
|
|
MarkLineDirtyForInterrupt(line);
|
|
break;
|
|
}
|
|
|
|
// If this is an inline frame then its time to stop
|
|
++line;
|
|
aState.AdvanceToNextLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
} //XXXfr shouldn't set this flag when nextinflow has no lines
|
|
}
|
|
|
|
// Handle an odd-ball case: a list-item with no lines
|
|
if (HasOutsideBullet() && mLines.empty()) {
|
|
ReflowOutput metrics(aState.mReflowInput);
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
ReflowBullet(bullet, aState, metrics,
|
|
aState.mReflowInput.ComputedPhysicalBorderPadding().top);
|
|
NS_ASSERTION(!BulletIsEmpty() || metrics.BSize(wm) == 0,
|
|
"empty bullet took up space");
|
|
|
|
if (!BulletIsEmpty()) {
|
|
// There are no lines so we have to fake up some y motion so that
|
|
// we end up with *some* height.
|
|
|
|
if (metrics.BlockStartAscent() == ReflowOutput::ASK_FOR_BASELINE) {
|
|
nscoord ascent;
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
if (nsLayoutUtils::GetFirstLineBaseline(wm, bullet, &ascent)) {
|
|
metrics.SetBlockStartAscent(ascent);
|
|
} else {
|
|
metrics.SetBlockStartAscent(metrics.BSize(wm));
|
|
}
|
|
}
|
|
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
|
|
|
|
nscoord minAscent =
|
|
nsLayoutUtils::GetCenteredFontBaseline(fm, aState.mMinLineHeight,
|
|
wm.IsLineInverted());
|
|
nscoord minDescent = aState.mMinLineHeight - minAscent;
|
|
|
|
aState.mBCoord += std::max(minAscent, metrics.BlockStartAscent()) +
|
|
std::max(minDescent, metrics.BSize(wm) -
|
|
metrics.BlockStartAscent());
|
|
|
|
nscoord offset = minAscent - metrics.BlockStartAscent();
|
|
if (offset > 0) {
|
|
bullet->SetRect(bullet->GetRect() + nsPoint(0, offset));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (foundAnyClears) {
|
|
AddStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
} else {
|
|
RemoveStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent - 1);
|
|
ListTag(stdout);
|
|
printf(": done reflowing dirty lines (status=%x)\n",
|
|
aState.mReflowStatus);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MarkLineDirtyForInterrupt(nsLineBox* aLine)
|
|
{
|
|
aLine->MarkDirty();
|
|
|
|
// Just checking NS_FRAME_IS_DIRTY is ok, because we've already
|
|
// marked the lines that need to be marked dirty based on our
|
|
// vertical resize stuff. So we'll definitely reflow all those kids;
|
|
// the only question is how they should behave.
|
|
if (GetStateBits() & NS_FRAME_IS_DIRTY) {
|
|
// Mark all our child frames dirty so we make sure to reflow them
|
|
// later.
|
|
int32_t n = aLine->GetChildCount();
|
|
for (nsIFrame* f = aLine->mFirstChild; n > 0;
|
|
f = f->GetNextSibling(), --n) {
|
|
f->AddStateBits(NS_FRAME_IS_DIRTY);
|
|
}
|
|
// And mark all the floats whose reflows we might be skipping dirty too.
|
|
if (aLine->HasFloats()) {
|
|
for (nsFloatCache* fc = aLine->GetFirstFloat(); fc; fc = fc->Next()) {
|
|
fc->mFloat->AddStateBits(NS_FRAME_IS_DIRTY);
|
|
}
|
|
}
|
|
} else {
|
|
// Dirty all the descendant lines of block kids to handle float damage,
|
|
// since our nsFloatManager will go away by the next time we're reflowing.
|
|
// XXXbz Can we do something more like what PropagateFloatDamage does?
|
|
// Would need to sort out the exact business with mBlockDelta for that....
|
|
// This marks way too much dirty. If we ever make this better, revisit
|
|
// which lines we mark dirty in the interrupt case in ReflowDirtyLines.
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(aLine->mFirstChild);
|
|
if (bf) {
|
|
MarkAllDescendantLinesDirty(bf);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteLine(BlockReflowInput& aState,
|
|
nsLineList::iterator aLine,
|
|
nsLineList::iterator aLineEnd)
|
|
{
|
|
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
|
|
if (0 == aLine->GetChildCount()) {
|
|
NS_ASSERTION(aState.mCurrentLine == aLine,
|
|
"using function more generally than designed, "
|
|
"but perhaps OK now");
|
|
nsLineBox* line = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
FreeLineBox(line);
|
|
// Mark the previous margin of the next line dirty since we need to
|
|
// recompute its top position.
|
|
if (aLine != aLineEnd)
|
|
aLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reflow a line. The line will either contain a single block frame
|
|
* or contain 1 or more inline frames. aKeepReflowGoing indicates
|
|
* whether or not the caller should continue to reflow more lines.
|
|
*/
|
|
void
|
|
nsBlockFrame::ReflowLine(BlockReflowInput& aState,
|
|
LineIterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
MOZ_ASSERT(aLine->GetChildCount(), "reflowing empty line");
|
|
|
|
// Setup the line-layout for the new line
|
|
aState.mCurrentLine = aLine;
|
|
aLine->ClearDirty();
|
|
aLine->InvalidateCachedIsEmpty();
|
|
aLine->ClearHadFloatPushed();
|
|
|
|
// Now that we know what kind of line we have, reflow it
|
|
if (aLine->IsBlock()) {
|
|
ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
|
|
} else {
|
|
aLine->SetLineWrapped(false);
|
|
ReflowInlineFrames(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::PullFrame(BlockReflowInput& aState,
|
|
LineIterator aLine)
|
|
{
|
|
// First check our remaining lines.
|
|
if (LinesEnd() != aLine.next()) {
|
|
return PullFrameFrom(aLine, this, aLine.next());
|
|
}
|
|
|
|
NS_ASSERTION(!GetOverflowLines(),
|
|
"Our overflow lines should have been removed at the start of reflow");
|
|
|
|
// Try each next-in-flow.
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
while (nextInFlow) {
|
|
if (nextInFlow->mLines.empty()) {
|
|
nextInFlow->DrainSelfOverflowList();
|
|
}
|
|
if (!nextInFlow->mLines.empty()) {
|
|
return PullFrameFrom(aLine, nextInFlow, nextInFlow->mLines.begin());
|
|
}
|
|
nextInFlow = static_cast<nsBlockFrame*>(nextInFlow->GetNextInFlow());
|
|
aState.mNextInFlow = nextInFlow;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::PullFrameFrom(nsLineBox* aLine,
|
|
nsBlockFrame* aFromContainer,
|
|
nsLineList::iterator aFromLine)
|
|
{
|
|
nsLineBox* fromLine = aFromLine;
|
|
MOZ_ASSERT(fromLine, "bad line to pull from");
|
|
MOZ_ASSERT(fromLine->GetChildCount(), "empty line");
|
|
MOZ_ASSERT(aLine->GetChildCount(), "empty line");
|
|
|
|
NS_ASSERTION(fromLine->IsBlock() == fromLine->mFirstChild->IsBlockOutside(),
|
|
"Disagreement about whether it's a block or not");
|
|
|
|
if (fromLine->IsBlock()) {
|
|
// If our line is not empty and the child in aFromLine is a block
|
|
// then we cannot pull up the frame into this line. In this case
|
|
// we stop pulling.
|
|
return nullptr;
|
|
}
|
|
// Take frame from fromLine
|
|
nsIFrame* frame = fromLine->mFirstChild;
|
|
nsIFrame* newFirstChild = frame->GetNextSibling();
|
|
|
|
if (aFromContainer != this) {
|
|
// The frame is being pulled from a next-in-flow; therefore we
|
|
// need to add it to our sibling list.
|
|
MOZ_ASSERT(aLine == mLines.back());
|
|
MOZ_ASSERT(aFromLine == aFromContainer->mLines.begin(),
|
|
"should only pull from first line");
|
|
aFromContainer->mFrames.RemoveFrame(frame);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented.
|
|
ReparentFrame(frame, aFromContainer, this);
|
|
mFrames.AppendFrame(nullptr, frame);
|
|
|
|
// The frame might have (or contain) floats that need to be brought
|
|
// over too. (pass 'false' since there are no siblings to check)
|
|
ReparentFloats(frame, aFromContainer, false);
|
|
} else {
|
|
MOZ_ASSERT(aLine == aFromLine.prev());
|
|
}
|
|
|
|
aLine->NoteFrameAdded(frame);
|
|
fromLine->NoteFrameRemoved(frame);
|
|
|
|
if (fromLine->GetChildCount() > 0) {
|
|
// Mark line dirty now that we pulled a child
|
|
fromLine->MarkDirty();
|
|
fromLine->mFirstChild = newFirstChild;
|
|
} else {
|
|
// Free up the fromLine now that it's empty.
|
|
// Its bounds might need to be redrawn, though.
|
|
if (aFromLine.next() != aFromContainer->mLines.end()) {
|
|
aFromLine.next()->MarkPreviousMarginDirty();
|
|
}
|
|
aFromContainer->mLines.erase(aFromLine);
|
|
// aFromLine is now invalid
|
|
aFromContainer->FreeLineBox(fromLine);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
return frame;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SlideLine(BlockReflowInput& aState,
|
|
nsLineBox* aLine, nscoord aDeltaBCoord)
|
|
{
|
|
NS_PRECONDITION(aDeltaBCoord != 0, "why slide a line nowhere?");
|
|
|
|
// Adjust line state
|
|
aLine->SlideBy(aDeltaBCoord, aState.ContainerSize());
|
|
|
|
// Adjust the frames in the line
|
|
MoveChildFramesOfLine(aLine, aDeltaBCoord);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::UpdateLineContainerSize(nsLineBox* aLine,
|
|
const nsSize& aNewContainerSize)
|
|
{
|
|
if (aNewContainerSize == aLine->mContainerSize) {
|
|
return;
|
|
}
|
|
|
|
// Adjust line state
|
|
nsSize sizeDelta = aLine->UpdateContainerSize(aNewContainerSize);
|
|
|
|
// Changing container width only matters if writing mode is vertical-rl
|
|
if (GetWritingMode().IsVerticalRL()) {
|
|
MoveChildFramesOfLine(aLine, sizeDelta.width);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MoveChildFramesOfLine(nsLineBox* aLine, nscoord aDeltaBCoord)
|
|
{
|
|
// Adjust the frames in the line
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
if (!kid) {
|
|
return;
|
|
}
|
|
|
|
WritingMode wm = GetWritingMode();
|
|
LogicalPoint translation(wm, 0, aDeltaBCoord);
|
|
|
|
if (aLine->IsBlock()) {
|
|
if (aDeltaBCoord) {
|
|
kid->MovePositionBy(wm, translation);
|
|
}
|
|
|
|
// Make sure the frame's view and any child views are updated
|
|
nsContainerFrame::PlaceFrameView(kid);
|
|
}
|
|
else {
|
|
// Adjust the block-dir coordinate of the frames in the line.
|
|
// Note: we need to re-position views even if aDeltaBCoord is 0, because
|
|
// one of our parent frames may have moved and so the view's position
|
|
// relative to its parent may have changed.
|
|
int32_t n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (aDeltaBCoord) {
|
|
kid->MovePositionBy(wm, translation);
|
|
}
|
|
// Make sure the frame's view and any child views are updated
|
|
nsContainerFrame::PlaceFrameView(kid);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
nsresult rv = nsContainerFrame::AttributeChanged(aNameSpaceID,
|
|
aAttribute, aModType);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsGkAtoms::value == aAttribute) {
|
|
const nsStyleDisplay* styleDisplay = StyleDisplay();
|
|
if (mozilla::StyleDisplay::ListItem == styleDisplay->mDisplay) {
|
|
// Search for the closest ancestor that's a block frame. We
|
|
// make the assumption that all related list items share a
|
|
// common block/grid/flex ancestor.
|
|
// XXXldb I think that's a bad assumption.
|
|
nsContainerFrame* ancestor = GetParent();
|
|
for (; ancestor; ancestor = ancestor->GetParent()) {
|
|
auto frameType = ancestor->GetType();
|
|
if (frameType == nsGkAtoms::blockFrame ||
|
|
frameType == nsGkAtoms::flexContainerFrame ||
|
|
frameType == nsGkAtoms::gridContainerFrame) {
|
|
break;
|
|
}
|
|
}
|
|
// Tell the ancestor to renumber list items within itself.
|
|
if (ancestor) {
|
|
// XXX Not sure if this is necessary anymore
|
|
if (ancestor->RenumberList()) {
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(ancestor, nsIPresShell::eStyleChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static inline bool
|
|
IsNonAutoNonZeroBSize(const nsStyleCoord& aCoord)
|
|
{
|
|
nsStyleUnit unit = aCoord.GetUnit();
|
|
if (unit == eStyleUnit_Auto ||
|
|
// The enumerated values were originally aimed at inline-size
|
|
// (or width, as it was before logicalization). For now, let them
|
|
// return false here, so we treat them like 'auto' pending a
|
|
// real implementation. (See bug 1126420.)
|
|
//
|
|
// FIXME (bug 567039, bug 527285)
|
|
// This isn't correct for the 'fill' value, which should more
|
|
// likely (but not necessarily, depending on the available space)
|
|
// be returning true.
|
|
unit == eStyleUnit_Enumerated) {
|
|
return false;
|
|
}
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
// If we evaluate the length/percent/calc at a percentage basis of
|
|
// both nscoord_MAX and 0, and it's zero both ways, then it's a zero
|
|
// length, percent, or combination thereof. Test > 0 so we clamp
|
|
// negative calc() results to 0.
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, nscoord_MAX) > 0 ||
|
|
nsRuleNode::ComputeCoordPercentCalc(aCoord, 0) > 0;
|
|
}
|
|
MOZ_ASSERT(false, "unexpected unit for height or min-height");
|
|
return true;
|
|
}
|
|
|
|
/* virtual */ bool
|
|
nsBlockFrame::IsSelfEmpty()
|
|
{
|
|
// Blocks which are margin-roots (including inline-blocks) cannot be treated
|
|
// as empty for margin-collapsing and other purposes. They're more like
|
|
// replaced elements.
|
|
if (GetStateBits() & NS_BLOCK_MARGIN_ROOT) {
|
|
return false;
|
|
}
|
|
|
|
WritingMode wm = GetWritingMode();
|
|
const nsStylePosition* position = StylePosition();
|
|
|
|
if (IsNonAutoNonZeroBSize(position->MinBSize(wm)) ||
|
|
IsNonAutoNonZeroBSize(position->BSize(wm))) {
|
|
return false;
|
|
}
|
|
|
|
const nsStyleBorder* border = StyleBorder();
|
|
const nsStylePadding* padding = StylePadding();
|
|
|
|
if (border->GetComputedBorderWidth(wm.PhysicalSide(eLogicalSideBStart)) != 0 ||
|
|
border->GetComputedBorderWidth(wm.PhysicalSide(eLogicalSideBEnd)) != 0 ||
|
|
!nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBStart(wm)) ||
|
|
!nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBEnd(wm))) {
|
|
return false;
|
|
}
|
|
|
|
if (HasOutsideBullet() && !BulletIsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::CachedIsEmpty()
|
|
{
|
|
if (!IsSelfEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (!line->CachedIsEmpty())
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::IsEmpty()
|
|
{
|
|
if (!IsSelfEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (!line->IsEmpty())
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::ShouldApplyBStartMargin(BlockReflowInput& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aChildFrame)
|
|
{
|
|
if (aState.mFlags.mShouldApplyBStartMargin) {
|
|
// Apply short-circuit check to avoid searching the line list
|
|
return true;
|
|
}
|
|
|
|
if (!aState.IsAdjacentWithTop() ||
|
|
aChildFrame->StyleBorder()->mBoxDecorationBreak ==
|
|
StyleBoxDecorationBreak::Clone) {
|
|
// If we aren't at the start block-coordinate then something of non-zero
|
|
// height must have been placed. Therefore the childs block-start margin
|
|
// applies.
|
|
aState.mFlags.mShouldApplyBStartMargin = true;
|
|
return true;
|
|
}
|
|
|
|
// Determine if this line is "essentially" the first line
|
|
LineIterator line = LinesBegin();
|
|
if (aState.mFlags.mHasLineAdjacentToTop) {
|
|
line = aState.mLineAdjacentToTop;
|
|
}
|
|
while (line != aLine) {
|
|
if (!line->CachedIsEmpty() || line->HasClearance()) {
|
|
// A line which precedes aLine is non-empty, or has clearance,
|
|
// so therefore the block-start margin applies.
|
|
aState.mFlags.mShouldApplyBStartMargin = true;
|
|
return true;
|
|
}
|
|
// No need to apply the block-start margin if the line has floats. We
|
|
// should collapse anyway (bug 44419)
|
|
++line;
|
|
aState.mFlags.mHasLineAdjacentToTop = true;
|
|
aState.mLineAdjacentToTop = line;
|
|
}
|
|
|
|
// The line being reflowed is "essentially" the first line in the
|
|
// block. Therefore its block-start margin will be collapsed by the
|
|
// generational collapsing logic with its parent (us).
|
|
return false;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowBlockFrame(BlockReflowInput& aState,
|
|
LineIterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
|
|
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
if (!frame) {
|
|
NS_ASSERTION(false, "program error - unexpected empty line");
|
|
return;
|
|
}
|
|
|
|
// Prepare the block reflow engine
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowInput);
|
|
|
|
StyleClear breakType = frame->StyleDisplay()->
|
|
PhysicalBreakType(aState.mReflowInput.GetWritingMode());
|
|
if (StyleClear::None != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = StyleClear::None;
|
|
}
|
|
|
|
// Clear past floats before the block if the clear style is not none
|
|
aLine->SetBreakTypeBefore(breakType);
|
|
|
|
// See if we should apply the block-start margin. If the block frame being
|
|
// reflowed is a continuation (non-null prev-in-flow) then we don't
|
|
// apply its block-start margin because it's not significant unless it has
|
|
// 'box-decoration-break:clone'. Otherwise, dig deeper.
|
|
bool applyBStartMargin = (frame->StyleBorder()->mBoxDecorationBreak ==
|
|
StyleBoxDecorationBreak::Clone ||
|
|
!frame->GetPrevInFlow()) &&
|
|
ShouldApplyBStartMargin(aState, aLine, frame);
|
|
if (applyBStartMargin) {
|
|
// The HasClearance setting is only valid if ShouldApplyBStartMargin
|
|
// returned false (in which case the block-start margin-root set our
|
|
// clearance flag). Otherwise clear it now. We'll set it later on
|
|
// ourselves if necessary.
|
|
aLine->ClearHasClearance();
|
|
}
|
|
bool treatWithClearance = aLine->HasClearance();
|
|
|
|
bool mightClearFloats = breakType != StyleClear::None;
|
|
nsIFrame *replacedBlock = nullptr;
|
|
if (!nsBlockFrame::BlockCanIntersectFloats(frame)) {
|
|
mightClearFloats = true;
|
|
replacedBlock = frame;
|
|
}
|
|
|
|
// If our block-start margin was counted as part of some parent's block-start
|
|
// margin collapse, and we are being speculatively reflowed assuming this
|
|
// frame DID NOT need clearance, then we need to check that
|
|
// assumption.
|
|
if (!treatWithClearance && !applyBStartMargin && mightClearFloats &&
|
|
aState.mReflowInput.mDiscoveredClearance) {
|
|
nscoord curBCoord = aState.mBCoord + aState.mPrevBEndMargin.get();
|
|
nscoord clearBCoord = aState.ClearFloats(curBCoord, breakType, replacedBlock);
|
|
if (clearBCoord != curBCoord) {
|
|
// Only record the first frame that requires clearance
|
|
if (!*aState.mReflowInput.mDiscoveredClearance) {
|
|
*aState.mReflowInput.mDiscoveredClearance = frame;
|
|
}
|
|
aState.mPrevChild = frame;
|
|
// Exactly what we do now is flexible since we'll definitely be
|
|
// reflowed.
|
|
return;
|
|
}
|
|
}
|
|
if (treatWithClearance) {
|
|
applyBStartMargin = true;
|
|
}
|
|
|
|
nsIFrame* clearanceFrame = nullptr;
|
|
nscoord startingBCoord = aState.mBCoord;
|
|
nsCollapsingMargin incomingMargin = aState.mPrevBEndMargin;
|
|
nscoord clearance;
|
|
// Save the original position of the frame so that we can reposition
|
|
// its view as needed.
|
|
nsPoint originalPosition = frame->GetPosition();
|
|
while (true) {
|
|
clearance = 0;
|
|
nscoord bStartMargin = 0;
|
|
bool mayNeedRetry = false;
|
|
bool clearedFloats = false;
|
|
if (applyBStartMargin) {
|
|
// Precompute the blocks block-start margin value so that we can get the
|
|
// correct available space (there might be a float that's
|
|
// already been placed below the aState.mPrevBEndMargin
|
|
|
|
// Setup a reflowInput to get the style computed block-start margin
|
|
// value. We'll use a reason of `resize' so that we don't fudge
|
|
// any incremental reflow state.
|
|
|
|
// The availSpace here is irrelevant to our needs - all we want
|
|
// out if this setup is the block-start margin value which doesn't depend
|
|
// on the childs available space.
|
|
// XXX building a complete ReflowInput just to get the block-start
|
|
// margin seems like a waste. And we do this for almost every block!
|
|
WritingMode wm = frame->GetWritingMode();
|
|
LogicalSize availSpace = aState.ContentSize(wm);
|
|
ReflowInput reflowInput(aState.mPresContext, aState.mReflowInput,
|
|
frame, availSpace);
|
|
|
|
if (treatWithClearance) {
|
|
aState.mBCoord += aState.mPrevBEndMargin.get();
|
|
aState.mPrevBEndMargin.Zero();
|
|
}
|
|
|
|
// Now compute the collapsed margin-block-start value into
|
|
// aState.mPrevBEndMargin, assuming that all child margins
|
|
// collapse down to clearanceFrame.
|
|
brc.ComputeCollapsedBStartMargin(reflowInput,
|
|
&aState.mPrevBEndMargin,
|
|
clearanceFrame,
|
|
&mayNeedRetry);
|
|
|
|
// XXX optimization; we could check the collapsing children to see if they are sure
|
|
// to require clearance, and so avoid retrying them
|
|
|
|
if (clearanceFrame) {
|
|
// Don't allow retries on the second pass. The clearance decisions for the
|
|
// blocks whose block-start margins collapse with ours are now fixed.
|
|
mayNeedRetry = false;
|
|
}
|
|
|
|
if (!treatWithClearance && !clearanceFrame && mightClearFloats) {
|
|
// We don't know if we need clearance and this is the first,
|
|
// optimistic pass. So determine whether *this block* needs
|
|
// clearance. Note that we do not allow the decision for whether
|
|
// this block has clearance to change on the second pass; that
|
|
// decision is only allowed to be made under the optimistic
|
|
// first pass.
|
|
nscoord curBCoord = aState.mBCoord + aState.mPrevBEndMargin.get();
|
|
nscoord clearBCoord = aState.ClearFloats(curBCoord, breakType, replacedBlock);
|
|
if (clearBCoord != curBCoord) {
|
|
// Looks like we need clearance and we didn't know about it already. So
|
|
// recompute collapsed margin
|
|
treatWithClearance = true;
|
|
// Remember this decision, needed for incremental reflow
|
|
aLine->SetHasClearance();
|
|
|
|
// Apply incoming margins
|
|
aState.mBCoord += aState.mPrevBEndMargin.get();
|
|
aState.mPrevBEndMargin.Zero();
|
|
|
|
// Compute the collapsed margin again, ignoring the incoming margin this time
|
|
mayNeedRetry = false;
|
|
brc.ComputeCollapsedBStartMargin(reflowInput,
|
|
&aState.mPrevBEndMargin,
|
|
clearanceFrame,
|
|
&mayNeedRetry);
|
|
}
|
|
}
|
|
|
|
// Temporarily advance the running Y value so that the
|
|
// GetAvailableSpace method will return the right available
|
|
// space. This undone as soon as the horizontal margins are
|
|
// computed.
|
|
bStartMargin = aState.mPrevBEndMargin.get();
|
|
|
|
if (treatWithClearance) {
|
|
nscoord currentBCoord = aState.mBCoord;
|
|
// advance mBCoord to the clear position.
|
|
aState.mBCoord = aState.ClearFloats(aState.mBCoord, breakType,
|
|
replacedBlock);
|
|
|
|
clearedFloats = aState.mBCoord != currentBCoord;
|
|
|
|
// Compute clearance. It's the amount we need to add to the block-start
|
|
// border-edge of the frame, after applying collapsed margins
|
|
// from the frame and its children, to get it to line up with
|
|
// the block-end of the floats. The former is
|
|
// currentBCoord + bStartMargin, the latter is the current
|
|
// aState.mBCoord.
|
|
// Note that negative clearance is possible
|
|
clearance = aState.mBCoord - (currentBCoord + bStartMargin);
|
|
|
|
// Add clearance to our block-start margin while we compute available
|
|
// space for the frame
|
|
bStartMargin += clearance;
|
|
|
|
// Note that aState.mBCoord should stay where it is: at the block-start
|
|
// border-edge of the frame
|
|
} else {
|
|
// Advance aState.mBCoord to the block-start border-edge of the frame.
|
|
aState.mBCoord += bStartMargin;
|
|
}
|
|
}
|
|
|
|
aLine->SetLineIsImpactedByFloat(false);
|
|
|
|
// Here aState.mBCoord is the block-start border-edge of the block.
|
|
// Compute the available space for the block
|
|
nsFlowAreaRect floatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
LogicalRect availSpace(wm);
|
|
aState.ComputeBlockAvailSpace(frame, floatAvailableSpace,
|
|
replacedBlock != nullptr, availSpace);
|
|
|
|
// The check for
|
|
// (!aState.mReflowInput.mFlags.mIsTopOfPage || clearedFloats)
|
|
// is to some degree out of paranoia: if we reliably eat up block-start
|
|
// margins at the top of the page as we ought to, it wouldn't be
|
|
// needed.
|
|
if ((!aState.mReflowInput.mFlags.mIsTopOfPage || clearedFloats) &&
|
|
availSpace.BSize(wm) < 0) {
|
|
// We know already that this child block won't fit on this
|
|
// page/column due to the block-start margin or the clearance. So we
|
|
// need to get out of here now. (If we don't, most blocks will handle
|
|
// things fine, and report break-before, but zero-height blocks
|
|
// won't, and will thus make their parent overly-large and force
|
|
// *it* to be pushed in its entirety.)
|
|
// Doing this means that we also don't need to worry about the
|
|
// |availSpace.BSize(wm) += bStartMargin| below interacting with
|
|
// pushed floats (which force nscoord_MAX clearance) to cause a
|
|
// constrained block size to turn into an unconstrained one.
|
|
aState.mBCoord = startingBCoord;
|
|
aState.mPrevBEndMargin = incomingMargin;
|
|
*aKeepReflowGoing = false;
|
|
if (ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else {
|
|
PushLines(aState, aLine.prev());
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Now put the block-dir coordinate back to the start of the
|
|
// block-start-margin + clearance.
|
|
aState.mBCoord -= bStartMargin;
|
|
availSpace.BStart(wm) -= bStartMargin;
|
|
if (NS_UNCONSTRAINEDSIZE != availSpace.BSize(wm)) {
|
|
availSpace.BSize(wm) += bStartMargin;
|
|
}
|
|
|
|
// construct the html reflow state for the block. ReflowBlock
|
|
// will initialize it.
|
|
Maybe<ReflowInput> blockHtmlRI;
|
|
blockHtmlRI.emplace(
|
|
aState.mPresContext, aState.mReflowInput, frame,
|
|
availSpace.Size(wm).ConvertTo(frame->GetWritingMode(), wm));
|
|
|
|
nsFloatManager::SavedState floatManagerState;
|
|
nsReflowStatus frameReflowStatus;
|
|
do {
|
|
if (floatAvailableSpace.mHasFloats) {
|
|
// Set if floatAvailableSpace.mHasFloats is true for any
|
|
// iteration of the loop.
|
|
aLine->SetLineIsImpactedByFloat(true);
|
|
}
|
|
|
|
// We might need to store into mDiscoveredClearance later if it's
|
|
// currently null; we want to overwrite any writes that
|
|
// brc.ReflowBlock() below does, so we need to remember now
|
|
// whether it's empty.
|
|
const bool shouldStoreClearance =
|
|
aState.mReflowInput.mDiscoveredClearance &&
|
|
!*aState.mReflowInput.mDiscoveredClearance;
|
|
|
|
// Reflow the block into the available space
|
|
if (mayNeedRetry || replacedBlock) {
|
|
aState.mFloatManager->PushState(&floatManagerState);
|
|
}
|
|
|
|
if (mayNeedRetry) {
|
|
blockHtmlRI->mDiscoveredClearance = &clearanceFrame;
|
|
} else if (!applyBStartMargin) {
|
|
blockHtmlRI->mDiscoveredClearance =
|
|
aState.mReflowInput.mDiscoveredClearance;
|
|
}
|
|
|
|
frameReflowStatus = NS_FRAME_COMPLETE;
|
|
brc.ReflowBlock(availSpace, applyBStartMargin, aState.mPrevBEndMargin,
|
|
clearance, aState.IsAdjacentWithTop(),
|
|
aLine.get(), *blockHtmlRI, frameReflowStatus, aState);
|
|
|
|
// Now the block has a height. Using that height, get the
|
|
// available space again and call ComputeBlockAvailSpace again.
|
|
// If ComputeBlockAvailSpace gives a different result, we need to
|
|
// reflow again.
|
|
if (!replacedBlock) {
|
|
break;
|
|
}
|
|
|
|
LogicalRect oldFloatAvailableSpaceRect(floatAvailableSpace.mRect);
|
|
floatAvailableSpace = aState.GetFloatAvailableSpaceForBSize(
|
|
aState.mBCoord + bStartMargin,
|
|
brc.GetMetrics().BSize(wm),
|
|
&floatManagerState);
|
|
NS_ASSERTION(floatAvailableSpace.mRect.BStart(wm) ==
|
|
oldFloatAvailableSpaceRect.BStart(wm),
|
|
"yikes");
|
|
// Restore the height to the position of the next band.
|
|
floatAvailableSpace.mRect.BSize(wm) =
|
|
oldFloatAvailableSpaceRect.BSize(wm);
|
|
// Determine whether the available space shrunk on either side,
|
|
// because (the first time round) we now know the block's height,
|
|
// and it may intersect additional floats, or (on later
|
|
// iterations) because narrowing the width relative to the
|
|
// previous time may cause the block to become taller. Note that
|
|
// since we're reflowing the block, narrowing the width might also
|
|
// make it shorter, so we must pass aCanGrow as true.
|
|
if (!AvailableSpaceShrunk(wm, oldFloatAvailableSpaceRect,
|
|
floatAvailableSpace.mRect, true)) {
|
|
// The size and position we chose before are fine (i.e., they
|
|
// don't cause intersecting with floats that requires a change
|
|
// in size or position), so we're done.
|
|
break;
|
|
}
|
|
|
|
bool advanced = false;
|
|
if (!aState.ReplacedBlockFitsInAvailSpace(replacedBlock,
|
|
floatAvailableSpace)) {
|
|
// Advance to the next band.
|
|
nscoord newBCoord = aState.mBCoord;
|
|
if (aState.AdvanceToNextBand(floatAvailableSpace.mRect, &newBCoord)) {
|
|
advanced = true;
|
|
}
|
|
// ClearFloats might be able to advance us further once we're there.
|
|
aState.mBCoord =
|
|
aState.ClearFloats(newBCoord, StyleClear::None, replacedBlock);
|
|
// Start over with a new available space rect at the new height.
|
|
floatAvailableSpace =
|
|
aState.GetFloatAvailableSpaceWithState(aState.mBCoord,
|
|
&floatManagerState);
|
|
}
|
|
|
|
LogicalRect oldAvailSpace(availSpace);
|
|
aState.ComputeBlockAvailSpace(frame, floatAvailableSpace,
|
|
replacedBlock != nullptr, availSpace);
|
|
|
|
if (!advanced && availSpace.IsEqualEdges(oldAvailSpace)) {
|
|
break;
|
|
}
|
|
|
|
// We need another reflow.
|
|
aState.mFloatManager->PopState(&floatManagerState);
|
|
|
|
if (!treatWithClearance && !applyBStartMargin &&
|
|
aState.mReflowInput.mDiscoveredClearance) {
|
|
// We set shouldStoreClearance above to record only the first
|
|
// frame that requires clearance.
|
|
if (shouldStoreClearance) {
|
|
*aState.mReflowInput.mDiscoveredClearance = frame;
|
|
}
|
|
aState.mPrevChild = frame;
|
|
// Exactly what we do now is flexible since we'll definitely be
|
|
// reflowed.
|
|
return;
|
|
}
|
|
|
|
if (advanced) {
|
|
// We're pushing down the border-box, so we don't apply margin anymore.
|
|
// This should never cause us to move up since the call to
|
|
// GetFloatAvailableSpaceForBSize above included the margin.
|
|
applyBStartMargin = false;
|
|
bStartMargin = 0;
|
|
treatWithClearance = true; // avoid hitting test above
|
|
clearance = 0;
|
|
}
|
|
|
|
blockHtmlRI.reset();
|
|
blockHtmlRI.emplace(
|
|
aState.mPresContext, aState.mReflowInput, frame,
|
|
availSpace.Size(wm).ConvertTo(frame->GetWritingMode(), wm));
|
|
} while (true);
|
|
|
|
if (mayNeedRetry && clearanceFrame) {
|
|
aState.mFloatManager->PopState(&floatManagerState);
|
|
aState.mBCoord = startingBCoord;
|
|
aState.mPrevBEndMargin = incomingMargin;
|
|
continue;
|
|
}
|
|
|
|
aState.mPrevChild = frame;
|
|
|
|
if (blockHtmlRI->WillReflowAgainForClearance()) {
|
|
// If an ancestor of ours is going to reflow for clearance, we
|
|
// need to avoid calling PlaceBlock, because it unsets dirty bits
|
|
// on the child block (both itself, and through its call to
|
|
// nsFrame::DidReflow), and those dirty bits imply dirtiness for
|
|
// all of the child block, including the lines it didn't reflow.
|
|
NS_ASSERTION(originalPosition == frame->GetPosition(),
|
|
"we need to call PositionChildViews");
|
|
return;
|
|
}
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(true, frameReflowStatus);
|
|
#endif
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// None of the child block fits.
|
|
*aKeepReflowGoing = false;
|
|
if (ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else {
|
|
PushLines(aState, aLine.prev());
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
}
|
|
else {
|
|
// Note: line-break-after a block is a nop
|
|
|
|
// Try to place the child block.
|
|
// Don't force the block to fit if we have positive clearance, because
|
|
// pushing it to the next page would give it more room.
|
|
// Don't force the block to fit if it's impacted by a float. If it is,
|
|
// then pushing it to the next page would give it more room. Note that
|
|
// isImpacted doesn't include impact from the block's own floats.
|
|
bool forceFit = aState.IsAdjacentWithTop() && clearance <= 0 &&
|
|
!floatAvailableSpace.mHasFloats;
|
|
nsCollapsingMargin collapsedBEndMargin;
|
|
nsOverflowAreas overflowAreas;
|
|
*aKeepReflowGoing = brc.PlaceBlock(*blockHtmlRI, forceFit, aLine.get(),
|
|
collapsedBEndMargin,
|
|
overflowAreas,
|
|
frameReflowStatus);
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(frameReflowStatus) &&
|
|
ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
*aKeepReflowGoing = false;
|
|
}
|
|
|
|
if (aLine->SetCarriedOutBEndMargin(collapsedBEndMargin)) {
|
|
LineIterator nextLine = aLine;
|
|
++nextLine;
|
|
if (nextLine != LinesEnd()) {
|
|
nextLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
aLine->SetOverflowAreas(overflowAreas);
|
|
if (*aKeepReflowGoing) {
|
|
// Some of the child block fit
|
|
|
|
// Advance to new Y position
|
|
nscoord newBCoord = aLine->BEnd();
|
|
aState.mBCoord = newBCoord;
|
|
|
|
|
|
// Continue the block frame now if it didn't completely fit in
|
|
// the available space.
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(frameReflowStatus)) {
|
|
bool madeContinuation =
|
|
CreateContinuationFor(aState, nullptr, frame);
|
|
|
|
nsIFrame* nextFrame = frame->GetNextInFlow();
|
|
NS_ASSERTION(nextFrame, "We're supposed to have a next-in-flow by now");
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// If nextFrame used to be an overflow container, make it a normal block
|
|
if (!madeContinuation &&
|
|
(NS_FRAME_IS_OVERFLOW_CONTAINER & nextFrame->GetStateBits())) {
|
|
nsOverflowContinuationTracker::AutoFinish fini(aState.mOverflowTracker, frame);
|
|
nsContainerFrame* parent = nextFrame->GetParent();
|
|
nsresult rv = parent->StealFrame(nextFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
if (parent != this)
|
|
ReparentFrame(nextFrame, parent, this);
|
|
mFrames.InsertFrame(nullptr, frame, nextFrame);
|
|
madeContinuation = true; // needs to be added to mLines
|
|
nextFrame->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
frameReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
// Push continuation to a new line, but only if we actually made one.
|
|
if (madeContinuation) {
|
|
nsLineBox* line = NewLineBox(nextFrame, true);
|
|
mLines.after_insert(aLine, line);
|
|
}
|
|
|
|
PushLines(aState, aLine);
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
|
|
// If we need to reflow the continuation of the block child,
|
|
// then we'd better reflow our continuation
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
// We also need to make that continuation's line dirty so
|
|
// it gets reflowed when we reflow our next in flow. The
|
|
// nif's line must always be either a line of the nif's
|
|
// parent block (only if we didn't make a continuation) or
|
|
// else one of our own overflow lines. In the latter case
|
|
// the line is already marked dirty, so just handle the
|
|
// first case.
|
|
if (!madeContinuation) {
|
|
nsBlockFrame* nifBlock =
|
|
nsLayoutUtils::GetAsBlock(nextFrame->GetParent());
|
|
NS_ASSERTION(nifBlock,
|
|
"A block's child's next in flow's parent must be a block!");
|
|
for (LineIterator line = nifBlock->LinesBegin(),
|
|
line_end = nifBlock->LinesEnd(); line != line_end; ++line) {
|
|
if (line->Contains(nextFrame)) {
|
|
line->MarkDirty();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*aKeepReflowGoing = false;
|
|
|
|
// The block-end margin for a block is only applied on the last
|
|
// flow block. Since we just continued the child block frame,
|
|
// we know that line->mFirstChild is not the last flow block
|
|
// therefore zero out the running margin value.
|
|
#ifdef NOISY_BLOCK_DIR_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow incomplete, frame=");
|
|
nsFrame::ListTag(stdout, mFrame);
|
|
printf(" prevBEndMargin=%d, setting to zero\n",
|
|
aState.mPrevBEndMargin.get());
|
|
#endif
|
|
aState.mPrevBEndMargin.Zero();
|
|
}
|
|
else { // frame is complete but its overflow is not complete
|
|
// Disconnect the next-in-flow and put it in our overflow tracker
|
|
if (!madeContinuation &&
|
|
!(NS_FRAME_IS_OVERFLOW_CONTAINER & nextFrame->GetStateBits())) {
|
|
// It already exists, but as a normal next-in-flow, so we need
|
|
// to dig it out of the child lists.
|
|
nsresult rv = nextFrame->GetParent()->StealFrame(nextFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
}
|
|
else if (madeContinuation) {
|
|
mFrames.RemoveFrame(nextFrame);
|
|
}
|
|
|
|
// Put it in our overflow list
|
|
aState.mOverflowTracker->Insert(nextFrame, frameReflowStatus);
|
|
NS_MergeReflowStatusInto(&aState.mReflowStatus, frameReflowStatus);
|
|
|
|
#ifdef NOISY_BLOCK_DIR_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow complete but overflow incomplete for ");
|
|
nsFrame::ListTag(stdout, mFrame);
|
|
printf(" prevBEndMargin=%d collapsedBEndMargin=%d\n",
|
|
aState.mPrevBEndMargin.get(), collapsedBEndMargin.get());
|
|
#endif
|
|
aState.mPrevBEndMargin = collapsedBEndMargin;
|
|
}
|
|
}
|
|
else { // frame is fully complete
|
|
#ifdef NOISY_BLOCK_DIR_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow complete for ");
|
|
nsFrame::ListTag(stdout, mFrame);
|
|
printf(" prevBEndMargin=%d collapsedBEndMargin=%d\n",
|
|
aState.mPrevBEndMargin.get(), collapsedBEndMargin.get());
|
|
#endif
|
|
aState.mPrevBEndMargin = collapsedBEndMargin;
|
|
}
|
|
#ifdef NOISY_BLOCK_DIR_MARGINS
|
|
ListTag(stdout);
|
|
printf(": frame=");
|
|
nsFrame::ListTag(stdout, mFrame);
|
|
printf(" carriedOutBEndMargin=%d collapsedBEndMargin=%d => %d\n",
|
|
brc.GetCarriedOutBEndMargin().get(), collapsedBEndMargin.get(),
|
|
aState.mPrevBEndMargin.get());
|
|
#endif
|
|
} else {
|
|
if ((aLine == mLines.front() && !GetPrevInFlow()) ||
|
|
ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
// If it's our very first line *or* we're not at the top of the page
|
|
// and we have page-break-inside:avoid, then we need to be pushed to
|
|
// our parent's next-in-flow.
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else {
|
|
// Push the line that didn't fit and any lines that follow it
|
|
// to our next-in-flow.
|
|
PushLines(aState, aLine.prev());
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
}
|
|
}
|
|
break; // out of the reflow retry loop
|
|
}
|
|
|
|
// Now that we've got its final position all figured out, position any child
|
|
// views it may have. Note that the case when frame has a view got handled
|
|
// by FinishReflowChild, but that function didn't have the coordinates needed
|
|
// to correctly decide whether to reposition child views.
|
|
if (originalPosition != frame->GetPosition() && !frame->HasView()) {
|
|
nsContainerFrame::PositionChildViews(frame);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowInlineFrames(BlockReflowInput& aState,
|
|
LineIterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
*aKeepReflowGoing = true;
|
|
|
|
aLine->SetLineIsImpactedByFloat(false);
|
|
|
|
// Setup initial coordinate system for reflowing the inline frames
|
|
// into. Apply a previous block frame's block-end margin first.
|
|
if (ShouldApplyBStartMargin(aState, aLine, aLine->mFirstChild)) {
|
|
aState.mBCoord += aState.mPrevBEndMargin.get();
|
|
}
|
|
nsFlowAreaRect floatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
|
|
LineReflowStatus lineReflowStatus;
|
|
do {
|
|
nscoord availableSpaceBSize = 0;
|
|
aState.mLineBSize.reset();
|
|
do {
|
|
bool allowPullUp = true;
|
|
nsIFrame* forceBreakInFrame = nullptr;
|
|
int32_t forceBreakOffset = -1;
|
|
gfxBreakPriority forceBreakPriority = gfxBreakPriority::eNoBreak;
|
|
do {
|
|
nsFloatManager::SavedState floatManagerState;
|
|
aState.mReflowInput.mFloatManager->PushState(&floatManagerState);
|
|
|
|
// Once upon a time we allocated the first 30 nsLineLayout objects
|
|
// on the stack, and then we switched to the heap. At that time
|
|
// these objects were large (1100 bytes on a 32 bit system).
|
|
// Then the nsLineLayout object was shrunk to 156 bytes by
|
|
// removing some internal buffers. Given that it is so much
|
|
// smaller, the complexity of 2 different ways of allocating
|
|
// no longer makes sense. Now we always allocate on the stack.
|
|
nsLineLayout lineLayout(aState.mPresContext,
|
|
aState.mReflowInput.mFloatManager,
|
|
&aState.mReflowInput, &aLine, nullptr);
|
|
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
|
|
if (forceBreakInFrame) {
|
|
lineLayout.ForceBreakAtPosition(forceBreakInFrame, forceBreakOffset);
|
|
}
|
|
DoReflowInlineFrames(aState, lineLayout, aLine,
|
|
floatAvailableSpace, availableSpaceBSize,
|
|
&floatManagerState, aKeepReflowGoing,
|
|
&lineReflowStatus, allowPullUp);
|
|
lineLayout.EndLineReflow();
|
|
|
|
if (LineReflowStatus::RedoNoPull == lineReflowStatus ||
|
|
LineReflowStatus::RedoMoreFloats == lineReflowStatus ||
|
|
LineReflowStatus::RedoNextBand == lineReflowStatus) {
|
|
if (lineLayout.NeedsBackup()) {
|
|
NS_ASSERTION(!forceBreakInFrame, "Backing up twice; this should never be necessary");
|
|
// If there is no saved break position, then this will set
|
|
// set forceBreakInFrame to null and we won't back up, which is
|
|
// correct.
|
|
forceBreakInFrame =
|
|
lineLayout.GetLastOptionalBreakPosition(&forceBreakOffset, &forceBreakPriority);
|
|
} else {
|
|
forceBreakInFrame = nullptr;
|
|
}
|
|
// restore the float manager state
|
|
aState.mReflowInput.mFloatManager->PopState(&floatManagerState);
|
|
// Clear out float lists
|
|
aState.mCurrentLineFloats.DeleteAll();
|
|
aState.mBelowCurrentLineFloats.DeleteAll();
|
|
}
|
|
|
|
// Don't allow pullup on a subsequent LineReflowStatus::RedoNoPull pass
|
|
allowPullUp = false;
|
|
} while (LineReflowStatus::RedoNoPull == lineReflowStatus);
|
|
} while (LineReflowStatus::RedoMoreFloats == lineReflowStatus);
|
|
} while (LineReflowStatus::RedoNextBand == lineReflowStatus);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushTruncatedLine(BlockReflowInput& aState,
|
|
LineIterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
PushLines(aState, aLine.prev());
|
|
*aKeepReflowGoing = false;
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DoReflowInlineFrames(BlockReflowInput& aState,
|
|
nsLineLayout& aLineLayout,
|
|
LineIterator aLine,
|
|
nsFlowAreaRect& aFloatAvailableSpace,
|
|
nscoord& aAvailableSpaceBSize,
|
|
nsFloatManager::SavedState*
|
|
aFloatStateBeforeLine,
|
|
bool* aKeepReflowGoing,
|
|
LineReflowStatus* aLineReflowStatus,
|
|
bool aAllowPullUp)
|
|
{
|
|
// Forget all of the floats on the line
|
|
aLine->FreeFloats(aState.mFloatCacheFreeList);
|
|
aState.mFloatOverflowAreas.Clear();
|
|
|
|
// We need to set this flag on the line if any of our reflow passes
|
|
// are impacted by floats.
|
|
if (aFloatAvailableSpace.mHasFloats)
|
|
aLine->SetLineIsImpactedByFloat(true);
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
|
|
this, aFloatAvailableSpace.mHasFloats);
|
|
#endif
|
|
|
|
WritingMode outerWM = aState.mReflowInput.GetWritingMode();
|
|
WritingMode lineWM = GetWritingMode(aLine->mFirstChild);
|
|
LogicalRect lineRect =
|
|
aFloatAvailableSpace.mRect.ConvertTo(lineWM, outerWM,
|
|
aState.ContainerSize());
|
|
|
|
nscoord iStart = lineRect.IStart(lineWM);
|
|
nscoord availISize = lineRect.ISize(lineWM);
|
|
nscoord availBSize;
|
|
if (aState.mFlags.mHasUnconstrainedBSize) {
|
|
availBSize = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
/* XXX get the height right! */
|
|
availBSize = lineRect.BSize(lineWM);
|
|
}
|
|
|
|
// Make sure to enable resize optimization before we call BeginLineReflow
|
|
// because it might get disabled there
|
|
aLine->EnableResizeReflowOptimization();
|
|
|
|
aLineLayout.BeginLineReflow(iStart, aState.mBCoord,
|
|
availISize, availBSize,
|
|
aFloatAvailableSpace.mHasFloats,
|
|
false, /*XXX isTopOfPage*/
|
|
lineWM, aState.mContainerSize);
|
|
|
|
aState.mFlags.mIsLineLayoutEmpty = false;
|
|
|
|
// XXX Unfortunately we need to know this before reflowing the first
|
|
// inline frame in the line. FIX ME.
|
|
if ((0 == aLineLayout.GetLineNumber()) &&
|
|
(NS_BLOCK_HAS_FIRST_LETTER_CHILD & mState) &&
|
|
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
|
|
aLineLayout.SetFirstLetterStyleOK(true);
|
|
}
|
|
NS_ASSERTION(!((NS_BLOCK_HAS_FIRST_LETTER_CHILD & mState) &&
|
|
GetPrevContinuation()),
|
|
"first letter child bit should only be on first continuation");
|
|
|
|
// Reflow the frames that are already on the line first
|
|
LineReflowStatus lineReflowStatus = LineReflowStatus::OK;
|
|
int32_t i;
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
|
|
if (aFloatAvailableSpace.mHasFloats) {
|
|
// There is a soft break opportunity at the start of the line, because
|
|
// we can always move this line down below float(s).
|
|
if (aLineLayout.NotifyOptionalBreakPosition(
|
|
frame, 0, true, gfxBreakPriority::eNormalBreak)) {
|
|
lineReflowStatus = LineReflowStatus::RedoNextBand;
|
|
}
|
|
}
|
|
|
|
// need to repeatedly call GetChildCount here, because the child
|
|
// count can change during the loop!
|
|
for (i = 0; LineReflowStatus::OK == lineReflowStatus && i < aLine->GetChildCount();
|
|
i++, frame = frame->GetNextSibling()) {
|
|
ReflowInlineFrame(aState, aLineLayout, aLine, frame, &lineReflowStatus);
|
|
if (LineReflowStatus::OK != lineReflowStatus) {
|
|
// It is possible that one or more of next lines are empty
|
|
// (because of DeleteNextInFlowChild). If so, delete them now
|
|
// in case we are finished.
|
|
++aLine;
|
|
while ((aLine != LinesEnd()) && (0 == aLine->GetChildCount())) {
|
|
// XXX Is this still necessary now that DeleteNextInFlowChild
|
|
// uses DoRemoveFrame?
|
|
nsLineBox *toremove = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
NS_ASSERTION(nullptr == toremove->mFirstChild, "bad empty line");
|
|
FreeLineBox(toremove);
|
|
}
|
|
--aLine;
|
|
|
|
NS_ASSERTION(lineReflowStatus != LineReflowStatus::Truncated,
|
|
"ReflowInlineFrame should never determine that a line "
|
|
"needs to go to the next page/column");
|
|
}
|
|
}
|
|
|
|
// Don't pull up new frames into lines with continuation placeholders
|
|
if (aAllowPullUp) {
|
|
// Pull frames and reflow them until we can't
|
|
while (LineReflowStatus::OK == lineReflowStatus) {
|
|
frame = PullFrame(aState, aLine);
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
|
|
while (LineReflowStatus::OK == lineReflowStatus) {
|
|
int32_t oldCount = aLine->GetChildCount();
|
|
ReflowInlineFrame(aState, aLineLayout, aLine, frame, &lineReflowStatus);
|
|
if (aLine->GetChildCount() != oldCount) {
|
|
// We just created a continuation for aFrame AND its going
|
|
// to end up on this line (e.g. :first-letter
|
|
// situation). Therefore we have to loop here before trying
|
|
// to pull another frame.
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
aState.mFlags.mIsLineLayoutEmpty = aLineLayout.LineIsEmpty();
|
|
|
|
// We only need to backup if the line isn't going to be reflowed again anyway
|
|
bool needsBackup = aLineLayout.NeedsBackup() &&
|
|
(lineReflowStatus == LineReflowStatus::Stop ||
|
|
lineReflowStatus == LineReflowStatus::OK);
|
|
if (needsBackup && aLineLayout.HaveForcedBreakPosition()) {
|
|
NS_WARNING("We shouldn't be backing up more than once! "
|
|
"Someone must have set a break opportunity beyond the available width, "
|
|
"even though there were better break opportunities before it");
|
|
needsBackup = false;
|
|
}
|
|
if (needsBackup) {
|
|
// We need to try backing up to before a text run
|
|
// XXX It's possible, in fact not unusual, for the break opportunity to already
|
|
// be the end of the line. We should detect that and optimize to not
|
|
// re-do the line.
|
|
if (aLineLayout.HasOptionalBreakPosition()) {
|
|
// We can back up!
|
|
lineReflowStatus = LineReflowStatus::RedoNoPull;
|
|
}
|
|
} else {
|
|
// In case we reflow this line again, remember that we don't
|
|
// need to force any breaking
|
|
aLineLayout.ClearOptionalBreakPosition();
|
|
}
|
|
|
|
if (LineReflowStatus::RedoNextBand == lineReflowStatus) {
|
|
// This happens only when we have a line that is impacted by
|
|
// floats and the first element in the line doesn't fit with
|
|
// the floats.
|
|
//
|
|
// What we do is to advance past the first float we find and
|
|
// then reflow the line all over again.
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE !=
|
|
aFloatAvailableSpace.mRect.BSize(outerWM),
|
|
"unconstrained block size on totally empty line");
|
|
|
|
// See the analogous code for blocks in BlockReflowInput::ClearFloats.
|
|
if (aFloatAvailableSpace.mRect.BSize(outerWM) > 0) {
|
|
NS_ASSERTION(aFloatAvailableSpace.mHasFloats,
|
|
"redo line on totally empty line with non-empty band...");
|
|
// We should never hit this case if we've placed floats on the
|
|
// line; if we have, then the GetFloatAvailableSpace call is wrong
|
|
// and needs to happen after the caller pops the space manager
|
|
// state.
|
|
aState.mFloatManager->AssertStateMatches(aFloatStateBeforeLine);
|
|
aState.mBCoord += aFloatAvailableSpace.mRect.BSize(outerWM);
|
|
aFloatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
} else {
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowInput.AvailableBSize(),
|
|
"We shouldn't be running out of height here");
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowInput.AvailableBSize()) {
|
|
// just move it down a bit to try to get out of this mess
|
|
aState.mBCoord += 1;
|
|
// We should never hit this case if we've placed floats on the
|
|
// line; if we have, then the GetFloatAvailableSpace call is wrong
|
|
// and needs to happen after the caller pops the space manager
|
|
// state.
|
|
aState.mFloatManager->AssertStateMatches(aFloatStateBeforeLine);
|
|
aFloatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
} else {
|
|
// There's nowhere to retry placing the line, so we want to push
|
|
// it to the next page/column where its contents can fit not
|
|
// next to a float.
|
|
lineReflowStatus = LineReflowStatus::Truncated;
|
|
PushTruncatedLine(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
}
|
|
|
|
// XXX: a small optimization can be done here when paginating:
|
|
// if the new Y coordinate is past the end of the block then
|
|
// push the line and return now instead of later on after we are
|
|
// past the float.
|
|
}
|
|
else if (LineReflowStatus::Truncated != lineReflowStatus &&
|
|
LineReflowStatus::RedoNoPull != lineReflowStatus) {
|
|
// If we are propagating out a break-before status then there is
|
|
// no point in placing the line.
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
|
|
if (!PlaceLine(aState, aLineLayout, aLine, aFloatStateBeforeLine,
|
|
aFloatAvailableSpace.mRect, aAvailableSpaceBSize,
|
|
aKeepReflowGoing)) {
|
|
lineReflowStatus = LineReflowStatus::RedoMoreFloats;
|
|
// PlaceLine already called GetAvailableSpaceForBSize for us.
|
|
}
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
printf("Line reflow status = %s\n", LineReflowStatusToString(lineReflowStatus));
|
|
}
|
|
#endif
|
|
|
|
if (aLineLayout.GetDirtyNextLine()) {
|
|
// aLine may have been pushed to the overflow lines.
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
// We can't just compare iterators front() to aLine here, since they may be in
|
|
// different lists.
|
|
bool pushedToOverflowLines = overflowLines &&
|
|
overflowLines->mLines.front() == aLine.get();
|
|
if (pushedToOverflowLines) {
|
|
// aLine is stale, it's associated with the main line list but it should
|
|
// be associated with the overflow line list now
|
|
aLine = overflowLines->mLines.begin();
|
|
}
|
|
nsBlockInFlowLineIterator iter(this, aLine, pushedToOverflowLines);
|
|
if (iter.Next() && iter.GetLine()->IsInline()) {
|
|
iter.GetLine()->MarkDirty();
|
|
if (iter.GetContainer() != this) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
}
|
|
|
|
*aLineReflowStatus = lineReflowStatus;
|
|
}
|
|
|
|
/**
|
|
* Reflow an inline frame. The reflow status is mapped from the frames
|
|
* reflow status to the lines reflow status (not to our reflow status).
|
|
* The line reflow status is simple: true means keep placing frames
|
|
* on the line; false means don't (the line is done). If the line
|
|
* has some sort of breaking affect then aLine's break-type will be set
|
|
* to something other than StyleClear::None.
|
|
*/
|
|
void
|
|
nsBlockFrame::ReflowInlineFrame(BlockReflowInput& aState,
|
|
nsLineLayout& aLineLayout,
|
|
LineIterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus)
|
|
{
|
|
if (!aFrame) { // XXX change to MOZ_ASSERT(aFrame)
|
|
NS_ERROR("why call me?");
|
|
return;
|
|
}
|
|
|
|
*aLineReflowStatus = LineReflowStatus::OK;
|
|
|
|
#ifdef NOISY_FIRST_LETTER
|
|
ListTag(stdout);
|
|
printf(": reflowing ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" reflowingFirstLetter=%s\n",
|
|
aLineLayout.GetFirstLetterStyleOK() ? "on" : "off");
|
|
#endif
|
|
|
|
// Reflow the inline frame
|
|
nsReflowStatus frameReflowStatus;
|
|
bool pushedFrame;
|
|
aLineLayout.ReflowFrame(aFrame, frameReflowStatus, nullptr, pushedFrame);
|
|
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aLineLayout.SetDirtyNextLine();
|
|
}
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": status=%x\n", frameReflowStatus);
|
|
#endif
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(false, frameReflowStatus);
|
|
#endif
|
|
|
|
// Send post-reflow notification
|
|
aState.mPrevChild = aFrame;
|
|
|
|
/* XXX
|
|
This is where we need to add logic to handle some odd behavior.
|
|
For one thing, we should usually place at least one thing next
|
|
to a left float, even when that float takes up all the width on a line.
|
|
see bug 22496
|
|
*/
|
|
|
|
// Process the child frames reflow status. There are 5 cases:
|
|
// complete, not-complete, break-before, break-after-complete,
|
|
// break-after-not-complete. There are two situations: we are a
|
|
// block or we are an inline. This makes a total of 10 cases
|
|
// (fortunately, there is some overlap).
|
|
aLine->SetBreakTypeAfter(StyleClear::None);
|
|
if (NS_INLINE_IS_BREAK(frameReflowStatus) ||
|
|
StyleClear::None != aState.mFloatBreakType) {
|
|
// Always abort the line reflow (because a line break is the
|
|
// minimal amount of break we do).
|
|
*aLineReflowStatus = LineReflowStatus::Stop;
|
|
|
|
// XXX what should aLine's break-type be set to in all these cases?
|
|
StyleClear breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
|
|
MOZ_ASSERT(StyleClear::None != breakType ||
|
|
StyleClear::None != aState.mFloatBreakType, "bad break type");
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// Break-before cases.
|
|
if (aFrame == aLine->mFirstChild) {
|
|
// If we break before the first frame on the line then we must
|
|
// be trying to place content where there's no room (e.g. on a
|
|
// line with wide floats). Inform the caller to reflow the
|
|
// line after skipping past a float.
|
|
*aLineReflowStatus = LineReflowStatus::RedoNextBand;
|
|
}
|
|
else {
|
|
// It's not the first child on this line so go ahead and split
|
|
// the line. We will see the frame again on the next-line.
|
|
SplitLine(aState, aLineLayout, aLine, aFrame, aLineReflowStatus);
|
|
|
|
// If we're splitting the line because the frame didn't fit and it
|
|
// was pushed, then mark the line as having word wrapped. We need to
|
|
// know that if we're shrink wrapping our width
|
|
if (pushedFrame) {
|
|
aLine->SetLineWrapped(true);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// If a float split and its prev-in-flow was followed by a <BR>, then combine
|
|
// the <BR>'s break type with the inline's break type (the inline will be the very
|
|
// next frame after the split float).
|
|
if (StyleClear::None != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = StyleClear::None;
|
|
}
|
|
// Break-after cases
|
|
if (breakType == StyleClear::Line) {
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
breakType = StyleClear::None;
|
|
}
|
|
}
|
|
aLine->SetBreakTypeAfter(breakType);
|
|
if (NS_FRAME_IS_COMPLETE(frameReflowStatus)) {
|
|
// Split line, but after the frame just reflowed
|
|
SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling(), aLineReflowStatus);
|
|
|
|
if (NS_INLINE_IS_BREAK_AFTER(frameReflowStatus) &&
|
|
!aLineLayout.GetLineEndsInBR()) {
|
|
aLineLayout.SetDirtyNextLine();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(frameReflowStatus)) {
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
CreateContinuationFor(aState, aLine, aFrame);
|
|
|
|
// Remember that the line has wrapped
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
aLine->SetLineWrapped(true);
|
|
}
|
|
|
|
// If we just ended a first-letter frame or reflowed a placeholder then
|
|
// don't split the line and don't stop the line reflow...
|
|
// But if we are going to stop anyways we'd better split the line.
|
|
if ((!(frameReflowStatus & NS_INLINE_BREAK_FIRST_LETTER_COMPLETE) &&
|
|
nsGkAtoms::placeholderFrame != aFrame->GetType()) ||
|
|
*aLineReflowStatus == LineReflowStatus::Stop) {
|
|
// Split line after the current frame
|
|
*aLineReflowStatus = LineReflowStatus::Stop;
|
|
SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling(), aLineReflowStatus);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::CreateContinuationFor(BlockReflowInput& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* newFrame = nullptr;
|
|
|
|
if (!aFrame->GetNextInFlow()) {
|
|
newFrame = aState.mPresContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(aState.mPresContext, aFrame, this);
|
|
|
|
mFrames.InsertFrame(nullptr, aFrame, newFrame);
|
|
|
|
if (aLine) {
|
|
aLine->NoteFrameAdded(newFrame);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyLines(false);
|
|
#endif
|
|
return !!newFrame;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitFloat(BlockReflowInput& aState,
|
|
nsIFrame* aFloat,
|
|
nsReflowStatus aFloatStatus)
|
|
{
|
|
MOZ_ASSERT(!NS_FRAME_IS_FULLY_COMPLETE(aFloatStatus),
|
|
"why split the frame if it's fully complete?");
|
|
MOZ_ASSERT(aState.mBlock == this);
|
|
|
|
nsIFrame* nextInFlow = aFloat->GetNextInFlow();
|
|
if (nextInFlow) {
|
|
nsContainerFrame *oldParent = nextInFlow->GetParent();
|
|
DebugOnly<nsresult> rv = oldParent->StealFrame(nextInFlow);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "StealFrame failed");
|
|
if (oldParent != this) {
|
|
ReparentFrame(nextInFlow, oldParent, this);
|
|
}
|
|
if (!NS_FRAME_OVERFLOW_IS_INCOMPLETE(aFloatStatus)) {
|
|
nextInFlow->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
}
|
|
} else {
|
|
nextInFlow = aState.mPresContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(aState.mPresContext, aFloat, this);
|
|
}
|
|
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aFloatStatus)) {
|
|
nextInFlow->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
}
|
|
|
|
StyleFloat floatStyle =
|
|
aFloat->StyleDisplay()->PhysicalFloats(aState.mReflowInput.GetWritingMode());
|
|
if (floatStyle == StyleFloat::Left) {
|
|
aState.mFloatManager->SetSplitLeftFloatAcrossBreak();
|
|
} else {
|
|
MOZ_ASSERT(floatStyle == StyleFloat::Right, "Unexpected float side!");
|
|
aState.mFloatManager->SetSplitRightFloatAcrossBreak();
|
|
}
|
|
|
|
aState.AppendPushedFloatChain(nextInFlow);
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsFloatCache*
|
|
GetLastFloat(nsLineBox* aLine)
|
|
{
|
|
nsFloatCache* fc = aLine->GetFirstFloat();
|
|
while (fc && fc->Next()) {
|
|
fc = fc->Next();
|
|
}
|
|
return fc;
|
|
}
|
|
|
|
static bool
|
|
CheckPlaceholderInLine(nsIFrame* aBlock, nsLineBox* aLine, nsFloatCache* aFC)
|
|
{
|
|
if (!aFC)
|
|
return true;
|
|
NS_ASSERTION(!aFC->mFloat->GetPrevContinuation(),
|
|
"float in a line should never be a continuation");
|
|
NS_ASSERTION(!(aFC->mFloat->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"float in a line should never be a pushed float");
|
|
nsIFrame* ph = aFC->mFloat->FirstInFlow()->GetPlaceholderFrame();
|
|
for (nsIFrame* f = ph; f; f = f->GetParent()) {
|
|
if (f->GetParent() == aBlock)
|
|
return aLine->Contains(f);
|
|
}
|
|
NS_ASSERTION(false, "aBlock is not an ancestor of aFrame!");
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SplitLine(BlockReflowInput& aState,
|
|
nsLineLayout& aLineLayout,
|
|
LineIterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus)
|
|
{
|
|
MOZ_ASSERT(aLine->IsInline(), "illegal SplitLine on block line");
|
|
|
|
int32_t pushCount = aLine->GetChildCount() - aLineLayout.GetCurrentSpanCount();
|
|
MOZ_ASSERT(pushCount >= 0, "bad push count");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("split line: from line=%p pushCount=%d aFrame=",
|
|
static_cast<void*>(aLine.get()), pushCount);
|
|
if (aFrame) {
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
}
|
|
else {
|
|
printf("(null)");
|
|
}
|
|
printf("\n");
|
|
if (gReallyNoisyReflow) {
|
|
aLine->List(stdout, gNoiseIndent+1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (0 != pushCount) {
|
|
MOZ_ASSERT(aLine->GetChildCount() > pushCount, "bad push");
|
|
MOZ_ASSERT(nullptr != aFrame, "whoops");
|
|
#ifdef DEBUG
|
|
{
|
|
nsIFrame *f = aFrame;
|
|
int32_t count = pushCount;
|
|
while (f && count > 0) {
|
|
f = f->GetNextSibling();
|
|
--count;
|
|
}
|
|
NS_ASSERTION(count == 0, "Not enough frames to push");
|
|
}
|
|
#endif
|
|
|
|
// Put frames being split out into their own line
|
|
nsLineBox* newLine = NewLineBox(aLine, aFrame, pushCount);
|
|
mLines.after_insert(aLine, newLine);
|
|
#ifdef DEBUG
|
|
if (gReallyNoisyReflow) {
|
|
newLine->List(stdout, gNoiseIndent+1);
|
|
}
|
|
#endif
|
|
|
|
// Let line layout know that some frames are no longer part of its
|
|
// state.
|
|
aLineLayout.SplitLineTo(aLine->GetChildCount());
|
|
|
|
// If floats have been placed whose placeholders have been pushed to the new
|
|
// line, we need to reflow the old line again. We don't want to look at the
|
|
// frames in the new line, because as a large paragraph is laid out the
|
|
// we'd get O(N^2) performance. So instead we just check that the last
|
|
// float and the last below-current-line float are still in aLine.
|
|
if (!CheckPlaceholderInLine(this, aLine, GetLastFloat(aLine)) ||
|
|
!CheckPlaceholderInLine(this, aLine, aState.mBelowCurrentLineFloats.Tail())) {
|
|
*aLineReflowStatus = LineReflowStatus::RedoNoPull;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::IsLastLine(BlockReflowInput& aState,
|
|
LineIterator aLine)
|
|
{
|
|
while (++aLine != LinesEnd()) {
|
|
// There is another line
|
|
if (0 != aLine->GetChildCount()) {
|
|
// If the next line is a block line then this line is the last in a
|
|
// group of inline lines.
|
|
return aLine->IsBlock();
|
|
}
|
|
// The next line is empty, try the next one
|
|
}
|
|
|
|
// XXX Not sure about this part
|
|
// Try our next-in-flows lines to answer the question
|
|
nsBlockFrame* nextInFlow = (nsBlockFrame*) GetNextInFlow();
|
|
while (nullptr != nextInFlow) {
|
|
for (LineIterator line = nextInFlow->LinesBegin(),
|
|
line_end = nextInFlow->LinesEnd();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (0 != line->GetChildCount())
|
|
return line->IsBlock();
|
|
}
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->GetNextInFlow();
|
|
}
|
|
|
|
// This is the last line - so don't allow justification
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::PlaceLine(BlockReflowInput& aState,
|
|
nsLineLayout& aLineLayout,
|
|
LineIterator aLine,
|
|
nsFloatManager::SavedState *aFloatStateBeforeLine,
|
|
LogicalRect& aFloatAvailableSpace,
|
|
nscoord& aAvailableSpaceBSize,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
// Trim extra white-space from the line before placing the frames
|
|
aLineLayout.TrimTrailingWhiteSpace();
|
|
|
|
// Vertically align the frames on this line.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. It's only placed on the second line in a
|
|
// rare case: when the first line is empty.
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
bool addedBullet = false;
|
|
if (HasOutsideBullet() &&
|
|
((aLine == mLines.front() &&
|
|
(!aLineLayout.IsZeroBSize() || (aLine == mLines.back()))) ||
|
|
(mLines.front() != mLines.back() &&
|
|
0 == mLines.front()->BSize() &&
|
|
aLine == mLines.begin().next()))) {
|
|
ReflowOutput metrics(aState.mReflowInput);
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
ReflowBullet(bullet, aState, metrics, aState.mBCoord);
|
|
NS_ASSERTION(!BulletIsEmpty() || metrics.BSize(wm) == 0,
|
|
"empty bullet took up space");
|
|
aLineLayout.AddBulletFrame(bullet, metrics);
|
|
addedBullet = true;
|
|
}
|
|
aLineLayout.VerticalAlignLine();
|
|
|
|
// We want to consider the floats in the current line when determining
|
|
// whether the float available space is shrunk. If mLineBSize doesn't
|
|
// exist, we are in the first pass trying to place the line. Calling
|
|
// GetFloatAvailableSpace() like we did in BlockReflowInput::AddFloat()
|
|
// for UpdateBand().
|
|
|
|
// floatAvailableSpaceWithOldLineBSize is the float available space with
|
|
// the old BSize, but including the floats that were added in this line.
|
|
LogicalRect floatAvailableSpaceWithOldLineBSize =
|
|
aState.mLineBSize.isNothing()
|
|
? aState.GetFloatAvailableSpace(aLine->BStart()).mRect
|
|
: aState.GetFloatAvailableSpaceForBSize(aLine->BStart(),
|
|
aState.mLineBSize.value(),
|
|
nullptr).mRect;
|
|
|
|
// As we redo for floats, we can't reduce the amount of BSize we're
|
|
// checking.
|
|
aAvailableSpaceBSize = std::max(aAvailableSpaceBSize, aLine->BSize());
|
|
LogicalRect floatAvailableSpaceWithLineBSize =
|
|
aState.GetFloatAvailableSpaceForBSize(aLine->BStart(),
|
|
aAvailableSpaceBSize,
|
|
nullptr).mRect;
|
|
|
|
// If the available space between the floats is smaller now that we
|
|
// know the BSize, return false (and cause another pass with
|
|
// LineReflowStatus::RedoMoreFloats). We ensure aAvailableSpaceBSize
|
|
// never decreases, which means that we can't reduce the set of floats
|
|
// we intersect, which means that the available space cannot grow.
|
|
if (AvailableSpaceShrunk(wm, floatAvailableSpaceWithOldLineBSize,
|
|
floatAvailableSpaceWithLineBSize, false)) {
|
|
// Prepare data for redoing the line.
|
|
aState.mLineBSize = Some(aLine->BSize());
|
|
|
|
// Since we want to redo the line, we update aFloatAvailableSpace by
|
|
// using the aFloatStateBeforeLine, which is the float manager's state
|
|
// before the line is placed.
|
|
LogicalRect oldFloatAvailableSpace(aFloatAvailableSpace);
|
|
aFloatAvailableSpace =
|
|
aState.GetFloatAvailableSpaceForBSize(aLine->BStart(),
|
|
aAvailableSpaceBSize,
|
|
aFloatStateBeforeLine).mRect;
|
|
NS_ASSERTION(aFloatAvailableSpace.BStart(wm) ==
|
|
oldFloatAvailableSpace.BStart(wm), "yikes");
|
|
// Restore the BSize to the position of the next band.
|
|
aFloatAvailableSpace.BSize(wm) = oldFloatAvailableSpace.BSize(wm);
|
|
|
|
// Enforce both IStart() and IEnd() never move outwards to prevent
|
|
// infinite grow-shrink loops.
|
|
const nscoord iStartDiff =
|
|
aFloatAvailableSpace.IStart(wm) - oldFloatAvailableSpace.IStart(wm);
|
|
const nscoord iEndDiff =
|
|
aFloatAvailableSpace.IEnd(wm) - oldFloatAvailableSpace.IEnd(wm);
|
|
if (iStartDiff < 0) {
|
|
aFloatAvailableSpace.IStart(wm) -= iStartDiff;
|
|
aFloatAvailableSpace.ISize(wm) += iStartDiff;
|
|
}
|
|
if (iEndDiff > 0) {
|
|
aFloatAvailableSpace.ISize(wm) -= iEndDiff;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (!GetParent()->IsCrazySizeAssertSuppressed()) {
|
|
static nscoord lastHeight = 0;
|
|
if (CRAZY_SIZE(aLine->BStart())) {
|
|
lastHeight = aLine->BStart();
|
|
if (abs(aLine->BStart() - lastHeight) > CRAZY_COORD/10) {
|
|
nsFrame::ListTag(stdout);
|
|
printf(": line=%p y=%d line.bounds.height=%d\n",
|
|
static_cast<void*>(aLine.get()),
|
|
aLine->BStart(), aLine->BSize());
|
|
}
|
|
}
|
|
else {
|
|
lastHeight = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Only block frames horizontally align their children because
|
|
// inline frames "shrink-wrap" around their children (therefore
|
|
// there is no extra horizontal space).
|
|
const nsStyleText* styleText = StyleText();
|
|
|
|
/**
|
|
* text-align-last defaults to the same value as text-align when
|
|
* text-align-last is set to auto (except when text-align is set to justify),
|
|
* so in that case we don't need to set isLastLine.
|
|
*
|
|
* In other words, isLastLine really means isLastLineAndWeCare.
|
|
*/
|
|
bool isLastLine =
|
|
!IsSVGText() &&
|
|
((NS_STYLE_TEXT_ALIGN_AUTO != styleText->mTextAlignLast ||
|
|
NS_STYLE_TEXT_ALIGN_JUSTIFY == styleText->mTextAlign) &&
|
|
(aLineLayout.GetLineEndsInBR() ||
|
|
IsLastLine(aState, aLine)));
|
|
|
|
aLineLayout.TextAlignLine(aLine, isLastLine);
|
|
|
|
// From here on, pfd->mBounds rectangles are incorrect because bidi
|
|
// might have moved frames around!
|
|
nsOverflowAreas overflowAreas;
|
|
aLineLayout.RelativePositionFrames(overflowAreas);
|
|
aLine->SetOverflowAreas(overflowAreas);
|
|
if (addedBullet) {
|
|
aLineLayout.RemoveBulletFrame(GetOutsideBullet());
|
|
}
|
|
|
|
// Inline lines do not have margins themselves; however they are
|
|
// impacted by prior block margins. If this line ends up having some
|
|
// height then we zero out the previous block-end margin value that was
|
|
// already applied to the line's starting Y coordinate. Otherwise we
|
|
// leave it be so that the previous blocks block-end margin can be
|
|
// collapsed with a block that follows.
|
|
nscoord newBCoord;
|
|
|
|
if (!aLine->CachedIsEmpty()) {
|
|
// This line has some height. Therefore the application of the
|
|
// previous-bottom-margin should stick.
|
|
aState.mPrevBEndMargin.Zero();
|
|
newBCoord = aLine->BEnd();
|
|
}
|
|
else {
|
|
// Don't let the previous-bottom-margin value affect the newBCoord
|
|
// coordinate (it was applied in ReflowInlineFrames speculatively)
|
|
// since the line is empty.
|
|
// We already called |ShouldApplyBStartMargin|, and if we applied it
|
|
// then mShouldApplyBStartMargin is set.
|
|
nscoord dy = aState.mFlags.mShouldApplyBStartMargin
|
|
? -aState.mPrevBEndMargin.get() : 0;
|
|
newBCoord = aState.mBCoord + dy;
|
|
}
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(aState.mReflowStatus) &&
|
|
ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
aLine->AppendFloats(aState.mCurrentLineFloats);
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
return true;
|
|
}
|
|
|
|
// See if the line fit (our first line always does).
|
|
if (mLines.front() != aLine &&
|
|
newBCoord > aState.mBEndEdge &&
|
|
aState.mBEndEdge != NS_UNCONSTRAINEDSIZE) {
|
|
NS_ASSERTION(aState.mCurrentLine == aLine, "oops");
|
|
if (ShouldAvoidBreakInside(aState.mReflowInput)) {
|
|
// All our content doesn't fit, start on the next page.
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else {
|
|
// Push aLine and all of its children and anything else that
|
|
// follows to our next-in-flow.
|
|
PushTruncatedLine(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
aState.mBCoord = newBCoord;
|
|
|
|
// Add the already placed current-line floats to the line
|
|
aLine->AppendFloats(aState.mCurrentLineFloats);
|
|
|
|
// Any below current line floats to place?
|
|
if (aState.mBelowCurrentLineFloats.NotEmpty()) {
|
|
// Reflow the below-current-line floats, which places on the line's
|
|
// float list.
|
|
aState.PlaceBelowCurrentLineFloats(aState.mBelowCurrentLineFloats, aLine);
|
|
aLine->AppendFloats(aState.mBelowCurrentLineFloats);
|
|
}
|
|
|
|
// When a line has floats, factor them into the combined-area
|
|
// computations.
|
|
if (aLine->HasFloats()) {
|
|
// Combine the float combined area (stored in aState) and the
|
|
// value computed by the line layout code.
|
|
nsOverflowAreas lineOverflowAreas;
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect &o = lineOverflowAreas.Overflow(otype);
|
|
o = aLine->GetOverflowArea(otype);
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
printf(": overflow %d lineCA=%d,%d,%d,%d floatCA=%d,%d,%d,%d\n",
|
|
otype,
|
|
o.x, o.y, o.width, o.height,
|
|
aState.mFloatOverflowAreas.Overflow(otype).x,
|
|
aState.mFloatOverflowAreas.Overflow(otype).y,
|
|
aState.mFloatOverflowAreas.Overflow(otype).width,
|
|
aState.mFloatOverflowAreas.Overflow(otype).height);
|
|
#endif
|
|
o.UnionRect(aState.mFloatOverflowAreas.Overflow(otype), o);
|
|
|
|
#ifdef NOISY_COMBINED_AREA
|
|
printf(" ==> final lineCA=%d,%d,%d,%d\n",
|
|
o.x, o.y, o.width, o.height);
|
|
#endif
|
|
}
|
|
aLine->SetOverflowAreas(lineOverflowAreas);
|
|
}
|
|
|
|
// Apply break-after clearing if necessary
|
|
// This must stay in sync with |ReflowDirtyLines|.
|
|
if (aLine->HasFloatBreakAfter()) {
|
|
aState.mBCoord = aState.ClearFloats(aState.mBCoord, aLine->GetBreakTypeAfter());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushLines(BlockReflowInput& aState,
|
|
nsLineList::iterator aLineBefore)
|
|
{
|
|
// NOTE: aLineBefore is always a normal line, not an overflow line.
|
|
// The following expression will assert otherwise.
|
|
DebugOnly<bool> check = aLineBefore == mLines.begin();
|
|
|
|
nsLineList::iterator overBegin(aLineBefore.next());
|
|
|
|
// PushTruncatedPlaceholderLine sometimes pushes the first line. Ugh.
|
|
bool firstLine = overBegin == LinesBegin();
|
|
|
|
if (overBegin != LinesEnd()) {
|
|
// Remove floats in the lines from mFloats
|
|
nsFrameList floats;
|
|
CollectFloats(overBegin->mFirstChild, floats, true);
|
|
|
|
if (floats.NotEmpty()) {
|
|
#ifdef DEBUG
|
|
for (nsIFrame* f : floats) {
|
|
MOZ_ASSERT(!(f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"CollectFloats should've removed that bit");
|
|
}
|
|
#endif
|
|
// Push the floats onto the front of the overflow out-of-flows list
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.InsertFrames(nullptr, nullptr, floats);
|
|
}
|
|
|
|
// overflow lines can already exist in some cases, in particular,
|
|
// when shrinkwrapping and we discover that the shrinkwap causes
|
|
// the height of some child block to grow which creates additional
|
|
// overflowing content. In such cases we must prepend the new
|
|
// overflow to the existing overflow.
|
|
FrameLines* overflowLines = RemoveOverflowLines();
|
|
if (!overflowLines) {
|
|
// XXXldb use presshell arena!
|
|
overflowLines = new FrameLines();
|
|
}
|
|
if (overflowLines) {
|
|
nsIFrame* lineBeforeLastFrame;
|
|
if (firstLine) {
|
|
lineBeforeLastFrame = nullptr; // removes all frames
|
|
} else {
|
|
nsIFrame* f = overBegin->mFirstChild;
|
|
lineBeforeLastFrame = f ? f->GetPrevSibling() : mFrames.LastChild();
|
|
NS_ASSERTION(!f || lineBeforeLastFrame == aLineBefore->LastChild(),
|
|
"unexpected line frames");
|
|
}
|
|
nsFrameList pushedFrames = mFrames.RemoveFramesAfter(lineBeforeLastFrame);
|
|
overflowLines->mFrames.InsertFrames(nullptr, nullptr, pushedFrames);
|
|
|
|
overflowLines->mLines.splice(overflowLines->mLines.begin(), mLines,
|
|
overBegin, LinesEnd());
|
|
NS_ASSERTION(!overflowLines->mLines.empty(), "should not be empty");
|
|
// this takes ownership but it won't delete it immediately so we
|
|
// can keep using it.
|
|
SetOverflowLines(overflowLines);
|
|
|
|
// Mark all the overflow lines dirty so that they get reflowed when
|
|
// they are pulled up by our next-in-flow.
|
|
|
|
// XXXldb Can this get called O(N) times making the whole thing O(N^2)?
|
|
for (LineIterator line = overflowLines->mLines.begin(),
|
|
line_end = overflowLines->mLines.end();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
line->MarkPreviousMarginDirty();
|
|
line->SetBoundsEmpty();
|
|
if (line->HasFloats()) {
|
|
line->FreeFloats(aState.mFloatCacheFreeList);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
}
|
|
|
|
// The overflowLines property is stored as a pointer to a line list,
|
|
// which must be deleted. However, the following functions all maintain
|
|
// the invariant that the property is never set if the list is empty.
|
|
|
|
bool
|
|
nsBlockFrame::DrainOverflowLines()
|
|
{
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
// Steal the prev-in-flow's overflow lines and prepend them.
|
|
bool didFindOverflow = false;
|
|
nsBlockFrame* prevBlock = static_cast<nsBlockFrame*>(GetPrevInFlow());
|
|
if (prevBlock) {
|
|
prevBlock->ClearLineCursor();
|
|
FrameLines* overflowLines = prevBlock->RemoveOverflowLines();
|
|
if (overflowLines) {
|
|
// Make all the frames on the overflow line list mine.
|
|
ReparentFrames(overflowLines->mFrames, prevBlock, this);
|
|
|
|
// Make the overflow out-of-flow frames mine too.
|
|
nsAutoOOFFrameList oofs(prevBlock);
|
|
if (oofs.mList.NotEmpty()) {
|
|
// In case we own a next-in-flow of any of the drained frames, then
|
|
// those are now not PUSHED_FLOATs anymore.
|
|
for (nsFrameList::Enumerator e(oofs.mList); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* nif = e.get()->GetNextInFlow();
|
|
for (; nif && nif->GetParent() == this; nif = nif->GetNextInFlow()) {
|
|
MOZ_ASSERT(mFloats.ContainsFrame(nif));
|
|
nif->RemoveStateBits(NS_FRAME_IS_PUSHED_FLOAT);
|
|
}
|
|
}
|
|
ReparentFrames(oofs.mList, prevBlock, this);
|
|
mFloats.InsertFrames(nullptr, nullptr, oofs.mList);
|
|
}
|
|
|
|
if (!mLines.empty()) {
|
|
// Remember to recompute the margins on the first line. This will
|
|
// also recompute the correct deltaBCoord if necessary.
|
|
mLines.front()->MarkPreviousMarginDirty();
|
|
}
|
|
// The overflow lines have already been marked dirty and their previous
|
|
// margins marked dirty also.
|
|
|
|
// Prepend the overflow frames/lines to our principal list.
|
|
mFrames.InsertFrames(nullptr, nullptr, overflowLines->mFrames);
|
|
mLines.splice(mLines.begin(), overflowLines->mLines);
|
|
NS_ASSERTION(overflowLines->mLines.empty(), "splice should empty list");
|
|
delete overflowLines;
|
|
didFindOverflow = true;
|
|
}
|
|
}
|
|
|
|
// Now append our own overflow lines.
|
|
return DrainSelfOverflowList() || didFindOverflow;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::DrainSelfOverflowList()
|
|
{
|
|
UniquePtr<FrameLines> ourOverflowLines(RemoveOverflowLines());
|
|
if (!ourOverflowLines) {
|
|
return false;
|
|
}
|
|
|
|
// No need to reparent frames in our own overflow lines/oofs, because they're
|
|
// already ours. But we should put overflow floats back in mFloats.
|
|
// (explicit scope to remove the OOF list before VerifyOverflowSituation)
|
|
{
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.NotEmpty()) {
|
|
#ifdef DEBUG
|
|
for (nsIFrame* f : oofs.mList) {
|
|
MOZ_ASSERT(!(f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"CollectFloats should've removed that bit");
|
|
}
|
|
#endif
|
|
// The overflow floats go after our regular floats.
|
|
mFloats.AppendFrames(nullptr, oofs.mList);
|
|
}
|
|
}
|
|
if (!ourOverflowLines->mLines.empty()) {
|
|
mFrames.AppendFrames(nullptr, ourOverflowLines->mFrames);
|
|
mLines.splice(mLines.end(), ourOverflowLines->mLines);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Pushed floats are floats whose placeholders are in a previous
|
|
* continuation. They might themselves be next-continuations of a float
|
|
* that partially fit in an earlier continuation, or they might be the
|
|
* first continuation of a float that couldn't be placed at all.
|
|
*
|
|
* Pushed floats live permanently at the beginning of a block's float
|
|
* list, where they must live *before* any floats whose placeholders are
|
|
* in that block.
|
|
*
|
|
* Temporarily, during reflow, they also live on the pushed floats list,
|
|
* which only holds them between (a) when one continuation pushes them to
|
|
* its pushed floats list because they don't fit and (b) when the next
|
|
* continuation pulls them onto the beginning of its float list.
|
|
*
|
|
* DrainPushedFloats sets up pushed floats the way we need them at the
|
|
* start of reflow; they are then reflowed by ReflowPushedFloats (which
|
|
* might push some of them on). Floats with placeholders in this block
|
|
* are reflowed by (BlockReflowInput/nsLineLayout)::AddFloat, which
|
|
* also maintains these invariants.
|
|
*
|
|
* DrainSelfPushedFloats moves any pushed floats from this block's own
|
|
* PushedFloats list back into mFloats. DrainPushedFloats additionally
|
|
* moves frames from its prev-in-flow's PushedFloats list into mFloats.
|
|
*/
|
|
void
|
|
nsBlockFrame::DrainSelfPushedFloats()
|
|
{
|
|
// If we're getting reflowed multiple times without our
|
|
// next-continuation being reflowed, we might need to pull back floats
|
|
// that we just put in the list to be pushed to our next-in-flow.
|
|
// We don't want to pull back any next-in-flows of floats on our own
|
|
// float list, and we only need to pull back first-in-flows whose
|
|
// placeholders were in earlier blocks (since first-in-flows whose
|
|
// placeholders are in this block will get pulled appropriately by
|
|
// AddFloat, and will then be more likely to be in the correct order).
|
|
// FIXME: What if there's a continuation in our pushed floats list
|
|
// whose prev-in-flow is in a previous continuation of this block
|
|
// rather than this block? Might we need to pull it back so we don't
|
|
// report ourselves complete?
|
|
// FIXME: Maybe we should just pull all of them back?
|
|
nsPresContext* presContext = PresContext();
|
|
nsFrameList* ourPushedFloats = GetPushedFloats();
|
|
if (ourPushedFloats) {
|
|
// When we pull back floats, we want to put them with the pushed
|
|
// floats, which must live at the start of our float list, but we
|
|
// want them at the end of those pushed floats.
|
|
// FIXME: This isn't quite right! What if they're all pushed floats?
|
|
nsIFrame *insertionPrevSibling = nullptr; /* beginning of list */
|
|
for (nsIFrame* f = mFloats.FirstChild();
|
|
f && (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT);
|
|
f = f->GetNextSibling()) {
|
|
insertionPrevSibling = f;
|
|
}
|
|
|
|
for (nsIFrame *f = ourPushedFloats->LastChild(), *next; f; f = next) {
|
|
next = f->GetPrevSibling();
|
|
|
|
if (f->GetPrevContinuation()) {
|
|
// FIXME
|
|
} else {
|
|
nsPlaceholderFrame* placeholder = f->GetPlaceholderFrame();
|
|
nsIFrame* floatOriginalParent = presContext->PresShell()->
|
|
FrameConstructor()->GetFloatContainingBlock(placeholder);
|
|
if (floatOriginalParent != this) {
|
|
// This is a first continuation that was pushed from one of our
|
|
// previous continuations. Take it out of the pushed floats
|
|
// list and put it in our floats list, before any of our
|
|
// floats, but after other pushed floats.
|
|
ourPushedFloats->RemoveFrame(f);
|
|
mFloats.InsertFrame(nullptr, insertionPrevSibling, f);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ourPushedFloats->IsEmpty()) {
|
|
RemovePushedFloats()->Delete(presContext->PresShell());
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DrainPushedFloats()
|
|
{
|
|
DrainSelfPushedFloats();
|
|
|
|
// After our prev-in-flow has completed reflow, it may have a pushed
|
|
// floats list, containing floats that we need to own. Take these.
|
|
nsBlockFrame* prevBlock = static_cast<nsBlockFrame*>(GetPrevInFlow());
|
|
if (prevBlock) {
|
|
AutoFrameListPtr list(PresContext(), prevBlock->RemovePushedFloats());
|
|
if (list && list->NotEmpty()) {
|
|
mFloats.InsertFrames(this, nullptr, *list);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsBlockFrame::FrameLines*
|
|
nsBlockFrame::GetOverflowLines() const
|
|
{
|
|
if (!HasOverflowLines()) {
|
|
return nullptr;
|
|
}
|
|
FrameLines* prop = GetProperty(OverflowLinesProperty());
|
|
NS_ASSERTION(prop && !prop->mLines.empty() &&
|
|
prop->mLines.front()->GetChildCount() == 0 ? prop->mFrames.IsEmpty() :
|
|
prop->mLines.front()->mFirstChild == prop->mFrames.FirstChild(),
|
|
"value should always be stored and non-empty when state set");
|
|
return prop;
|
|
}
|
|
|
|
nsBlockFrame::FrameLines*
|
|
nsBlockFrame::RemoveOverflowLines()
|
|
{
|
|
if (!HasOverflowLines()) {
|
|
return nullptr;
|
|
}
|
|
FrameLines* prop = RemoveProperty(OverflowLinesProperty());
|
|
NS_ASSERTION(prop && !prop->mLines.empty() &&
|
|
prop->mLines.front()->GetChildCount() == 0 ? prop->mFrames.IsEmpty() :
|
|
prop->mLines.front()->mFirstChild == prop->mFrames.FirstChild(),
|
|
"value should always be stored and non-empty when state set");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
return prop;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DestroyOverflowLines()
|
|
{
|
|
NS_ASSERTION(HasOverflowLines(), "huh?");
|
|
FrameLines* prop = RemoveProperty(OverflowLinesProperty());
|
|
NS_ASSERTION(prop && prop->mLines.empty(),
|
|
"value should always be stored but empty when destroying");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
delete prop;
|
|
}
|
|
|
|
// This takes ownership of aOverflowLines.
|
|
// XXX We should allocate overflowLines from presShell arena!
|
|
void
|
|
nsBlockFrame::SetOverflowLines(FrameLines* aOverflowLines)
|
|
{
|
|
NS_ASSERTION(aOverflowLines, "null lines");
|
|
NS_ASSERTION(!aOverflowLines->mLines.empty(), "empty lines");
|
|
NS_ASSERTION(aOverflowLines->mLines.front()->mFirstChild ==
|
|
aOverflowLines->mFrames.FirstChild(),
|
|
"invalid overflow lines / frames");
|
|
NS_ASSERTION(!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES),
|
|
"Overwriting existing overflow lines");
|
|
|
|
// Verify that we won't overwrite an existing overflow list
|
|
NS_ASSERTION(!GetProperty(OverflowLinesProperty()), "existing overflow list");
|
|
SetProperty(OverflowLinesProperty(), aOverflowLines);
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetOverflowOutOfFlows() const
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList* result =
|
|
GetPropTableFrames(OverflowOutOfFlowsProperty());
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
// This takes ownership of the frames
|
|
void
|
|
nsBlockFrame::SetOverflowOutOfFlows(const nsFrameList& aList,
|
|
nsFrameList* aPropValue)
|
|
{
|
|
NS_PRECONDITION(!!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS) ==
|
|
!!aPropValue, "state does not match value");
|
|
|
|
if (aList.IsEmpty()) {
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return;
|
|
}
|
|
nsFrameList* list = RemovePropTableFrames(OverflowOutOfFlowsProperty());
|
|
NS_ASSERTION(aPropValue == list, "prop value mismatch");
|
|
list->Clear();
|
|
list->Delete(PresContext()->PresShell());
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
else if (GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS) {
|
|
NS_ASSERTION(aPropValue == GetPropTableFrames(OverflowOutOfFlowsProperty()),
|
|
"prop value mismatch");
|
|
*aPropValue = aList;
|
|
}
|
|
else {
|
|
SetPropTableFrames(new (PresContext()->PresShell()) nsFrameList(aList),
|
|
OverflowOutOfFlowsProperty());
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
}
|
|
|
|
nsBulletFrame*
|
|
nsBlockFrame::GetInsideBullet() const
|
|
{
|
|
if (!HasInsideBullet()) {
|
|
return nullptr;
|
|
}
|
|
NS_ASSERTION(!HasOutsideBullet(), "invalid bullet state");
|
|
nsBulletFrame* frame = GetProperty(InsideBulletProperty());
|
|
NS_ASSERTION(frame && frame->GetType() == nsGkAtoms::bulletFrame,
|
|
"bogus inside bullet frame");
|
|
return frame;
|
|
}
|
|
|
|
nsBulletFrame*
|
|
nsBlockFrame::GetOutsideBullet() const
|
|
{
|
|
nsFrameList* list = GetOutsideBulletList();
|
|
return list ? static_cast<nsBulletFrame*>(list->FirstChild())
|
|
: nullptr;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetOutsideBulletList() const
|
|
{
|
|
if (!HasOutsideBullet()) {
|
|
return nullptr;
|
|
}
|
|
NS_ASSERTION(!HasInsideBullet(), "invalid bullet state");
|
|
nsFrameList* list = GetProperty(OutsideBulletProperty());
|
|
NS_ASSERTION(list && list->GetLength() == 1 &&
|
|
list->FirstChild()->GetType() == nsGkAtoms::bulletFrame,
|
|
"bogus outside bullet list");
|
|
return list;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetPushedFloats() const
|
|
{
|
|
if (!HasPushedFloats()) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList* result = GetProperty(PushedFloatProperty());
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::EnsurePushedFloats()
|
|
{
|
|
nsFrameList *result = GetPushedFloats();
|
|
if (result)
|
|
return result;
|
|
|
|
result = new (PresContext()->PresShell()) nsFrameList;
|
|
SetProperty(PushedFloatProperty(), result);
|
|
AddStateBits(NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
|
|
return result;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::RemovePushedFloats()
|
|
{
|
|
if (!HasPushedFloats()) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList *result = RemoveProperty(PushedFloatProperty());
|
|
RemoveStateBits(NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame list manipulation routines
|
|
|
|
void
|
|
nsBlockFrame::AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList)
|
|
{
|
|
if (aFrameList.IsEmpty()) {
|
|
return;
|
|
}
|
|
if (aListID != kPrincipalList) {
|
|
if (kFloatList == aListID) {
|
|
DrainSelfPushedFloats(); // ensure the last frame is in mFloats
|
|
mFloats.AppendFrames(nullptr, aFrameList);
|
|
return;
|
|
}
|
|
MOZ_ASSERT(kNoReflowPrincipalList == aListID, "unexpected child list");
|
|
}
|
|
|
|
// Find the proper last-child for where the append should go
|
|
nsIFrame* lastKid = mFrames.LastChild();
|
|
NS_ASSERTION((mLines.empty() ? nullptr : mLines.back()->LastChild()) ==
|
|
lastKid, "out-of-sync mLines / mFrames");
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": append ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (lastKid) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, lastKid);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
|
|
AddFrames(aFrameList, lastKid);
|
|
if (aListID != kNoReflowPrincipalList) {
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList)
|
|
{
|
|
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
|
|
"inserting after sibling frame with different parent");
|
|
|
|
if (aListID != kPrincipalList) {
|
|
if (kFloatList == aListID) {
|
|
DrainSelfPushedFloats(); // ensure aPrevFrame is in mFloats
|
|
mFloats.InsertFrames(this, aPrevFrame, aFrameList);
|
|
return;
|
|
}
|
|
MOZ_ASSERT(kNoReflowPrincipalList == aListID, "unexpected child list");
|
|
}
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": insert ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (aPrevFrame) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, aPrevFrame);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
|
|
AddFrames(aFrameList, aPrevFrame);
|
|
if (aListID != kNoReflowPrincipalList) {
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": remove ");
|
|
nsFrame::ListTag(stdout, aOldFrame);
|
|
printf("\n");
|
|
#endif
|
|
|
|
if (aListID == kPrincipalList) {
|
|
bool hasFloats = BlockHasAnyFloats(aOldFrame);
|
|
DoRemoveFrame(aOldFrame, REMOVE_FIXED_CONTINUATIONS);
|
|
if (hasFloats) {
|
|
MarkSameFloatManagerLinesDirty(this);
|
|
}
|
|
}
|
|
else if (kFloatList == aListID) {
|
|
// Make sure to mark affected lines dirty for the float frame
|
|
// we are removing; this way is a bit messy, but so is the rest of the code.
|
|
// See bug 390762.
|
|
NS_ASSERTION(!aOldFrame->GetPrevContinuation(),
|
|
"RemoveFrame should not be called on pushed floats.");
|
|
for (nsIFrame* f = aOldFrame;
|
|
f && !(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
f = f->GetNextContinuation()) {
|
|
MarkSameFloatManagerLinesDirty(static_cast<nsBlockFrame*>(f->GetParent()));
|
|
}
|
|
DoRemoveOutOfFlowFrame(aOldFrame);
|
|
}
|
|
else if (kNoReflowPrincipalList == aListID) {
|
|
// Skip the call to |FrameNeedsReflow| below by returning now.
|
|
DoRemoveFrame(aOldFrame, REMOVE_FIXED_CONTINUATIONS);
|
|
return;
|
|
}
|
|
else {
|
|
MOZ_CRASH("unexpected child list");
|
|
}
|
|
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
}
|
|
|
|
static bool
|
|
ShouldPutNextSiblingOnNewLine(nsIFrame* aLastFrame)
|
|
{
|
|
nsIAtom* type = aLastFrame->GetType();
|
|
if (type == nsGkAtoms::brFrame) {
|
|
return true;
|
|
}
|
|
// XXX the TEXT_OFFSETS_NEED_FIXING check is a wallpaper for bug 822910.
|
|
if (type == nsGkAtoms::textFrame &&
|
|
!(aLastFrame->GetStateBits() & TEXT_OFFSETS_NEED_FIXING)) {
|
|
return aLastFrame->HasSignificantTerminalNewline();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::AddFrames(nsFrameList& aFrameList, nsIFrame* aPrevSibling)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
if (aFrameList.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// If we're inserting at the beginning of our list and we have an
|
|
// inside bullet, insert after that bullet.
|
|
if (!aPrevSibling && HasInsideBullet()) {
|
|
aPrevSibling = GetInsideBullet();
|
|
}
|
|
|
|
// Attempt to find the line that contains the previous sibling
|
|
nsLineList* lineList = &mLines;
|
|
nsFrameList* frames = &mFrames;
|
|
nsLineList::iterator prevSibLine = lineList->end();
|
|
int32_t prevSiblingIndex = -1;
|
|
if (aPrevSibling) {
|
|
// XXX_perf This is technically O(N^2) in some cases, but by using
|
|
// RFind instead of Find, we make it O(N) in the most common case,
|
|
// which is appending content.
|
|
|
|
// Find the line that contains the previous sibling
|
|
if (!nsLineBox::RFindLineContaining(aPrevSibling, lineList->begin(),
|
|
prevSibLine, mFrames.LastChild(),
|
|
&prevSiblingIndex)) {
|
|
// Not in mLines - try overflow lines.
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
bool found = false;
|
|
if (overflowLines) {
|
|
prevSibLine = overflowLines->mLines.end();
|
|
prevSiblingIndex = -1;
|
|
found = nsLineBox::RFindLineContaining(aPrevSibling,
|
|
overflowLines->mLines.begin(),
|
|
prevSibLine,
|
|
overflowLines->mFrames.LastChild(),
|
|
&prevSiblingIndex);
|
|
}
|
|
if (MOZ_LIKELY(found)) {
|
|
lineList = &overflowLines->mLines;
|
|
frames = &overflowLines->mFrames;
|
|
} else {
|
|
// Note: defensive code! RFindLineContaining must not return
|
|
// false in this case, so if it does...
|
|
MOZ_ASSERT_UNREACHABLE("prev sibling not in line list");
|
|
aPrevSibling = nullptr;
|
|
prevSibLine = lineList->end();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Find the frame following aPrevSibling so that we can join up the
|
|
// two lists of frames.
|
|
if (aPrevSibling) {
|
|
// Split line containing aPrevSibling in two if the insertion
|
|
// point is somewhere in the middle of the line.
|
|
int32_t rem = prevSibLine->GetChildCount() - prevSiblingIndex - 1;
|
|
if (rem) {
|
|
// Split the line in two where the frame(s) are being inserted.
|
|
nsLineBox* line = NewLineBox(prevSibLine, aPrevSibling->GetNextSibling(), rem);
|
|
lineList->after_insert(prevSibLine, line);
|
|
// Mark prevSibLine dirty and as needing textrun invalidation, since
|
|
// we may be breaking up text in the line. Its previous line may also
|
|
// need to be invalidated because it may be able to pull some text up.
|
|
MarkLineDirty(prevSibLine, lineList);
|
|
// The new line will also need its textruns recomputed because of the
|
|
// frame changes.
|
|
line->MarkDirty();
|
|
line->SetInvalidateTextRuns(true);
|
|
}
|
|
}
|
|
else if (! lineList->empty()) {
|
|
lineList->front()->MarkDirty();
|
|
lineList->front()->SetInvalidateTextRuns(true);
|
|
}
|
|
const nsFrameList::Slice& newFrames =
|
|
frames->InsertFrames(nullptr, aPrevSibling, aFrameList);
|
|
|
|
// Walk through the new frames being added and update the line data
|
|
// structures to fit.
|
|
for (nsFrameList::Enumerator e(newFrames); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* newFrame = e.get();
|
|
NS_ASSERTION(!aPrevSibling || aPrevSibling->GetNextSibling() == newFrame,
|
|
"Unexpected aPrevSibling");
|
|
NS_ASSERTION(newFrame->GetType() != nsGkAtoms::placeholderFrame ||
|
|
(!newFrame->IsAbsolutelyPositioned() &&
|
|
!newFrame->IsFloating()),
|
|
"Placeholders should not float or be positioned");
|
|
|
|
bool isBlock = newFrame->IsBlockOutside();
|
|
|
|
// If the frame is a block frame, or if there is no previous line or if the
|
|
// previous line is a block line we need to make a new line. We also make
|
|
// a new line, as an optimization, in the two cases we know we'll need it:
|
|
// if the previous line ended with a <br>, or if it has significant whitespace
|
|
// and ended in a newline.
|
|
if (isBlock || prevSibLine == lineList->end() || prevSibLine->IsBlock() ||
|
|
(aPrevSibling && ShouldPutNextSiblingOnNewLine(aPrevSibling))) {
|
|
// Create a new line for the frame and add its line to the line
|
|
// list.
|
|
nsLineBox* line = NewLineBox(newFrame, isBlock);
|
|
if (prevSibLine != lineList->end()) {
|
|
// Append new line after prevSibLine
|
|
lineList->after_insert(prevSibLine, line);
|
|
++prevSibLine;
|
|
}
|
|
else {
|
|
// New line is going before the other lines
|
|
lineList->push_front(line);
|
|
prevSibLine = lineList->begin();
|
|
}
|
|
}
|
|
else {
|
|
prevSibLine->NoteFrameAdded(newFrame);
|
|
// We're adding inline content to prevSibLine, so we need to mark it
|
|
// dirty, ensure its textruns are recomputed, and possibly do the same
|
|
// to its previous line since that line may be able to pull content up.
|
|
MarkLineDirty(prevSibLine, lineList);
|
|
}
|
|
|
|
aPrevSibling = newFrame;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
MOZ_ASSERT(aFrameList.IsEmpty());
|
|
VerifyLines(true);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RemoveFloatFromFloatCache(nsIFrame* aFloat)
|
|
{
|
|
// Find which line contains the float, so we can update
|
|
// the float cache.
|
|
LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
for ( ; line != line_end; ++line) {
|
|
if (line->IsInline() && line->RemoveFloat(aFloat)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RemoveFloat(nsIFrame* aFloat)
|
|
{
|
|
#ifdef DEBUG
|
|
// Floats live in mFloats, or in the PushedFloat or OverflowOutOfFlows
|
|
// frame list properties.
|
|
if (!mFloats.ContainsFrame(aFloat)) {
|
|
MOZ_ASSERT((GetOverflowOutOfFlows() &&
|
|
GetOverflowOutOfFlows()->ContainsFrame(aFloat)) ||
|
|
(GetPushedFloats() &&
|
|
GetPushedFloats()->ContainsFrame(aFloat)),
|
|
"aFloat is not our child or on an unexpected frame list");
|
|
}
|
|
#endif
|
|
|
|
if (mFloats.StartRemoveFrame(aFloat)) {
|
|
return;
|
|
}
|
|
|
|
nsFrameList* list = GetPushedFloats();
|
|
if (list && list->ContinueRemoveFrame(aFloat)) {
|
|
#if 0
|
|
// XXXmats not yet - need to investigate BlockReflowInput::mPushedFloats
|
|
// first so we don't leave it pointing to a deleted list.
|
|
if (list->IsEmpty()) {
|
|
delete RemovePushedFloats();
|
|
}
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
{
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.ContinueRemoveFrame(aFloat)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DoRemoveOutOfFlowFrame(nsIFrame* aFrame)
|
|
{
|
|
// The containing block is always the parent of aFrame.
|
|
nsBlockFrame* block = (nsBlockFrame*)aFrame->GetParent();
|
|
|
|
// Remove aFrame from the appropriate list.
|
|
if (aFrame->IsAbsolutelyPositioned()) {
|
|
// This also deletes the next-in-flows
|
|
block->GetAbsoluteContainingBlock()->RemoveFrame(block,
|
|
kAbsoluteList,
|
|
aFrame);
|
|
}
|
|
else {
|
|
// First remove aFrame's next-in-flows.
|
|
nsIFrame* nif = aFrame->GetNextInFlow();
|
|
if (nif) {
|
|
nif->GetParent()->DeleteNextInFlowChild(nif, false);
|
|
}
|
|
// Now remove aFrame from its child list and Destroy it.
|
|
block->RemoveFloatFromFloatCache(aFrame);
|
|
block->RemoveFloat(aFrame);
|
|
aFrame->Destroy();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This helps us iterate over the list of all normal + overflow lines
|
|
*/
|
|
void
|
|
nsBlockFrame::TryAllLines(nsLineList::iterator* aIterator,
|
|
nsLineList::iterator* aStartIterator,
|
|
nsLineList::iterator* aEndIterator,
|
|
bool* aInOverflowLines,
|
|
FrameLines** aOverflowLines)
|
|
{
|
|
if (*aIterator == *aEndIterator) {
|
|
if (!*aInOverflowLines) {
|
|
// Try the overflow lines
|
|
*aInOverflowLines = true;
|
|
FrameLines* lines = GetOverflowLines();
|
|
if (lines) {
|
|
*aStartIterator = lines->mLines.begin();
|
|
*aIterator = *aStartIterator;
|
|
*aEndIterator = lines->mLines.end();
|
|
*aOverflowLines = lines;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
LineIterator aLine)
|
|
: mFrame(aFrame), mLine(aLine), mLineList(&aFrame->mLines)
|
|
{
|
|
// This will assert if aLine isn't in mLines of aFrame:
|
|
DebugOnly<bool> check = aLine == mFrame->LinesBegin();
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
LineIterator aLine, bool aInOverflow)
|
|
: mFrame(aFrame), mLine(aLine),
|
|
mLineList(aInOverflow ? &aFrame->GetOverflowLines()->mLines
|
|
: &aFrame->mLines)
|
|
{
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
bool* aFoundValidLine)
|
|
: mFrame(aFrame), mLineList(&aFrame->mLines)
|
|
{
|
|
mLine = aFrame->LinesBegin();
|
|
*aFoundValidLine = FindValidLine();
|
|
}
|
|
|
|
static nsIFrame*
|
|
FindChildContaining(nsBlockFrame* aFrame, nsIFrame* aFindFrame)
|
|
{
|
|
NS_ASSERTION(aFrame, "must have frame");
|
|
nsIFrame* child;
|
|
while (true) {
|
|
nsIFrame* block = aFrame;
|
|
do {
|
|
child = nsLayoutUtils::FindChildContainingDescendant(block, aFindFrame);
|
|
if (child)
|
|
break;
|
|
block = block->GetNextContinuation();
|
|
} while (block);
|
|
if (!child)
|
|
return nullptr;
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW))
|
|
break;
|
|
aFindFrame = child->GetPlaceholderFrame();
|
|
}
|
|
|
|
return child;
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
nsIFrame* aFindFrame, bool* aFoundValidLine)
|
|
: mFrame(aFrame), mLineList(&aFrame->mLines)
|
|
{
|
|
*aFoundValidLine = false;
|
|
|
|
nsIFrame* child = FindChildContaining(aFrame, aFindFrame);
|
|
if (!child)
|
|
return;
|
|
|
|
LineIterator line_end = aFrame->LinesEnd();
|
|
// Try to use the cursor if it exists, otherwise fall back to the first line
|
|
if (nsLineBox* const cursor = aFrame->GetLineCursor()) {
|
|
mLine = line_end;
|
|
// Perform a simultaneous forward and reverse search starting from the
|
|
// line cursor.
|
|
nsBlockFrame::LineIterator line = aFrame->LinesBeginFrom(cursor);
|
|
nsBlockFrame::ReverseLineIterator rline = aFrame->LinesRBeginFrom(cursor);
|
|
nsBlockFrame::ReverseLineIterator rline_end = aFrame->LinesREnd();
|
|
// rline is positioned on the line containing 'cursor', so it's not
|
|
// rline_end. So we can safely increment it (i.e. move it to one line
|
|
// earlier) to start searching there.
|
|
++rline;
|
|
while (line != line_end || rline != rline_end) {
|
|
if (line != line_end) {
|
|
if (line->Contains(child)) {
|
|
mLine = line;
|
|
break;
|
|
}
|
|
++line;
|
|
}
|
|
if (rline != rline_end) {
|
|
if (rline->Contains(child)) {
|
|
mLine = rline;
|
|
break;
|
|
}
|
|
++rline;
|
|
}
|
|
}
|
|
if (mLine != line_end) {
|
|
*aFoundValidLine = true;
|
|
if (mLine != cursor) {
|
|
aFrame->SetProperty(nsBlockFrame::LineCursorProperty(), mLine);
|
|
}
|
|
return;
|
|
}
|
|
} else {
|
|
for (mLine = aFrame->LinesBegin(); mLine != line_end; ++mLine) {
|
|
if (mLine->Contains(child)) {
|
|
*aFoundValidLine = true;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
// Didn't find the line
|
|
MOZ_ASSERT(mLine == line_end, "mLine should be line_end at this point");
|
|
|
|
// If we reach here, it means that we have not been able to find the
|
|
// desired frame in our in-flow lines. So we should start looking at
|
|
// our overflow lines. In order to do that, we set mLine to the end
|
|
// iterator so that FindValidLine starts to look at overflow lines,
|
|
// if any.
|
|
|
|
if (!FindValidLine())
|
|
return;
|
|
|
|
do {
|
|
if (mLine->Contains(child)) {
|
|
*aFoundValidLine = true;
|
|
return;
|
|
}
|
|
} while (Next());
|
|
}
|
|
|
|
nsBlockFrame::LineIterator
|
|
nsBlockInFlowLineIterator::End()
|
|
{
|
|
return mLineList->end();
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::IsLastLineInList()
|
|
{
|
|
LineIterator end = End();
|
|
return mLine != end && mLine.next() == end;
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::Next()
|
|
{
|
|
++mLine;
|
|
return FindValidLine();
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::Prev()
|
|
{
|
|
LineIterator begin = mLineList->begin();
|
|
if (mLine != begin) {
|
|
--mLine;
|
|
return true;
|
|
}
|
|
bool currentlyInOverflowLines = GetInOverflow();
|
|
while (true) {
|
|
if (currentlyInOverflowLines) {
|
|
mLineList = &mFrame->mLines;
|
|
mLine = mLineList->end();
|
|
if (mLine != mLineList->begin()) {
|
|
--mLine;
|
|
return true;
|
|
}
|
|
} else {
|
|
mFrame = static_cast<nsBlockFrame*>(mFrame->GetPrevInFlow());
|
|
if (!mFrame)
|
|
return false;
|
|
nsBlockFrame::FrameLines* overflowLines = mFrame->GetOverflowLines();
|
|
if (overflowLines) {
|
|
mLineList = &overflowLines->mLines;
|
|
mLine = mLineList->end();
|
|
NS_ASSERTION(mLine != mLineList->begin(), "empty overflow line list?");
|
|
--mLine;
|
|
return true;
|
|
}
|
|
}
|
|
currentlyInOverflowLines = !currentlyInOverflowLines;
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::FindValidLine()
|
|
{
|
|
LineIterator end = mLineList->end();
|
|
if (mLine != end)
|
|
return true;
|
|
bool currentlyInOverflowLines = GetInOverflow();
|
|
while (true) {
|
|
if (currentlyInOverflowLines) {
|
|
mFrame = static_cast<nsBlockFrame*>(mFrame->GetNextInFlow());
|
|
if (!mFrame)
|
|
return false;
|
|
mLineList = &mFrame->mLines;
|
|
mLine = mLineList->begin();
|
|
if (mLine != mLineList->end())
|
|
return true;
|
|
} else {
|
|
nsBlockFrame::FrameLines* overflowLines = mFrame->GetOverflowLines();
|
|
if (overflowLines) {
|
|
mLineList = &overflowLines->mLines;
|
|
mLine = mLineList->begin();
|
|
NS_ASSERTION(mLine != mLineList->end(), "empty overflow line list?");
|
|
return true;
|
|
}
|
|
}
|
|
currentlyInOverflowLines = !currentlyInOverflowLines;
|
|
}
|
|
}
|
|
|
|
static void RemoveBlockChild(nsIFrame* aFrame,
|
|
bool aRemoveOnlyFluidContinuations)
|
|
{
|
|
if (!aFrame) {
|
|
return;
|
|
}
|
|
nsBlockFrame* nextBlock = nsLayoutUtils::GetAsBlock(aFrame->GetParent());
|
|
NS_ASSERTION(nextBlock,
|
|
"Our child's continuation's parent is not a block?");
|
|
nextBlock->DoRemoveFrame(aFrame,
|
|
(aRemoveOnlyFluidContinuations ? 0 : nsBlockFrame::REMOVE_FIXED_CONTINUATIONS));
|
|
}
|
|
|
|
// This function removes aDeletedFrame and all its continuations. It
|
|
// is optimized for deleting a whole series of frames. The easy
|
|
// implementation would invoke itself recursively on
|
|
// aDeletedFrame->GetNextContinuation, then locate the line containing
|
|
// aDeletedFrame and remove aDeletedFrame from that line. But here we
|
|
// start by locating aDeletedFrame and then scanning from that point
|
|
// on looking for continuations.
|
|
void
|
|
nsBlockFrame::DoRemoveFrame(nsIFrame* aDeletedFrame, uint32_t aFlags)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
if (aDeletedFrame->GetStateBits() &
|
|
(NS_FRAME_OUT_OF_FLOW | NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
if (!aDeletedFrame->GetPrevInFlow()) {
|
|
NS_ASSERTION(aDeletedFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"Expected out-of-flow frame");
|
|
DoRemoveOutOfFlowFrame(aDeletedFrame);
|
|
}
|
|
else {
|
|
nsContainerFrame::DeleteNextInFlowChild(aDeletedFrame,
|
|
(aFlags & FRAMES_ARE_EMPTY) != 0);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Find the line that contains deletedFrame
|
|
nsLineList::iterator line_start = mLines.begin(),
|
|
line_end = mLines.end();
|
|
nsLineList::iterator line = line_start;
|
|
FrameLines* overflowLines = nullptr;
|
|
bool searchingOverflowList = false;
|
|
// Make sure we look in the overflow lines even if the normal line
|
|
// list is empty
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
while (line != line_end) {
|
|
if (line->Contains(aDeletedFrame)) {
|
|
break;
|
|
}
|
|
++line;
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
}
|
|
|
|
if (line == line_end) {
|
|
NS_ERROR("can't find deleted frame in lines");
|
|
return;
|
|
}
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY)) {
|
|
if (line != line_start) {
|
|
line.prev()->MarkDirty();
|
|
line.prev()->SetInvalidateTextRuns(true);
|
|
}
|
|
else if (searchingOverflowList && !mLines.empty()) {
|
|
mLines.back()->MarkDirty();
|
|
mLines.back()->SetInvalidateTextRuns(true);
|
|
}
|
|
}
|
|
|
|
while (line != line_end && aDeletedFrame) {
|
|
NS_ASSERTION(this == aDeletedFrame->GetParent(), "messed up delete code");
|
|
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY)) {
|
|
line->MarkDirty();
|
|
line->SetInvalidateTextRuns(true);
|
|
}
|
|
|
|
// If the frame being deleted is the last one on the line then
|
|
// optimize away the line->Contains(next-in-flow) call below.
|
|
bool isLastFrameOnLine = 1 == line->GetChildCount();
|
|
if (!isLastFrameOnLine) {
|
|
LineIterator next = line.next();
|
|
nsIFrame* lastFrame = next != line_end ?
|
|
next->mFirstChild->GetPrevSibling() :
|
|
(searchingOverflowList ? overflowLines->mFrames.LastChild() :
|
|
mFrames.LastChild());
|
|
NS_ASSERTION(next == line_end || lastFrame == line->LastChild(),
|
|
"unexpected line frames");
|
|
isLastFrameOnLine = lastFrame == aDeletedFrame;
|
|
}
|
|
|
|
// Remove aDeletedFrame from the line
|
|
if (line->mFirstChild == aDeletedFrame) {
|
|
// We should be setting this to null if aDeletedFrame
|
|
// is the only frame on the line. HOWEVER in that case
|
|
// we will be removing the line anyway, see below.
|
|
line->mFirstChild = aDeletedFrame->GetNextSibling();
|
|
}
|
|
|
|
// Hmm, this won't do anything if we're removing a frame in the first
|
|
// overflow line... Hopefully doesn't matter
|
|
--line;
|
|
if (line != line_end && !line->IsBlock()) {
|
|
// Since we just removed a frame that follows some inline
|
|
// frames, we need to reflow the previous line.
|
|
line->MarkDirty();
|
|
}
|
|
++line;
|
|
|
|
// Take aDeletedFrame out of the sibling list. Note that
|
|
// prevSibling will only be nullptr when we are deleting the very
|
|
// first frame in the main or overflow list.
|
|
if (searchingOverflowList) {
|
|
overflowLines->mFrames.RemoveFrame(aDeletedFrame);
|
|
} else {
|
|
mFrames.RemoveFrame(aDeletedFrame);
|
|
}
|
|
|
|
// Update the child count of the line to be accurate
|
|
line->NoteFrameRemoved(aDeletedFrame);
|
|
|
|
// Destroy frame; capture its next continuation first in case we need
|
|
// to destroy that too.
|
|
nsIFrame* deletedNextContinuation = (aFlags & REMOVE_FIXED_CONTINUATIONS) ?
|
|
aDeletedFrame->GetNextContinuation() : aDeletedFrame->GetNextInFlow();
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p frame=",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
nsFrame::ListTag(stdout, aDeletedFrame);
|
|
printf(" prevSibling=%p deletedNextContinuation=%p\n",
|
|
aDeletedFrame->GetPrevSibling(), deletedNextContinuation);
|
|
#endif
|
|
|
|
// If next-in-flow is an overflow container, must remove it first.
|
|
if (deletedNextContinuation &&
|
|
deletedNextContinuation->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
|
|
deletedNextContinuation->GetParent()->
|
|
DeleteNextInFlowChild(deletedNextContinuation, false);
|
|
deletedNextContinuation = nullptr;
|
|
}
|
|
|
|
aDeletedFrame->Destroy();
|
|
aDeletedFrame = deletedNextContinuation;
|
|
|
|
bool haveAdvancedToNextLine = false;
|
|
// If line is empty, remove it now.
|
|
if (0 == line->GetChildCount()) {
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p became empty so it will be removed\n",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
#endif
|
|
nsLineBox *cur = line;
|
|
if (!searchingOverflowList) {
|
|
line = mLines.erase(line);
|
|
// Invalidate the space taken up by the line.
|
|
// XXX We need to do this if we're removing a frame as a result of
|
|
// a call to RemoveFrame(), but we may not need to do this in all
|
|
// cases...
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
nsRect visOverflow(cur->GetVisualOverflowArea());
|
|
printf("%p invalidate 10 (%d, %d, %d, %d)\n",
|
|
this, visOverflow.x, visOverflow.y,
|
|
visOverflow.width, visOverflow.height);
|
|
#endif
|
|
} else {
|
|
line = overflowLines->mLines.erase(line);
|
|
if (overflowLines->mLines.empty()) {
|
|
DestroyOverflowLines();
|
|
overflowLines = nullptr;
|
|
// We just invalidated our iterators. Since we were in
|
|
// the overflow lines list, which is now empty, set them
|
|
// so we're at the end of the regular line list.
|
|
line_start = mLines.begin();
|
|
line_end = mLines.end();
|
|
line = line_end;
|
|
}
|
|
}
|
|
FreeLineBox(cur);
|
|
|
|
// If we're removing a line, ReflowDirtyLines isn't going to
|
|
// know that it needs to slide lines unless something is marked
|
|
// dirty. So mark the previous margin of the next line dirty if
|
|
// there is one.
|
|
if (line != line_end) {
|
|
line->MarkPreviousMarginDirty();
|
|
}
|
|
haveAdvancedToNextLine = true;
|
|
} else {
|
|
// Make the line that just lost a frame dirty, and advance to
|
|
// the next line.
|
|
if (!deletedNextContinuation || isLastFrameOnLine ||
|
|
!line->Contains(deletedNextContinuation)) {
|
|
line->MarkDirty();
|
|
++line;
|
|
haveAdvancedToNextLine = true;
|
|
}
|
|
}
|
|
|
|
if (deletedNextContinuation) {
|
|
// See if we should keep looking in the current flow's line list.
|
|
if (deletedNextContinuation->GetParent() != this) {
|
|
// The deceased frames continuation is not a child of the
|
|
// current block. So break out of the loop so that we advance
|
|
// to the next parent.
|
|
//
|
|
// If we have a continuation in a different block then all bets are
|
|
// off regarding whether we are deleting frames without actual content,
|
|
// so don't propagate FRAMES_ARE_EMPTY any further.
|
|
aFlags &= ~FRAMES_ARE_EMPTY;
|
|
break;
|
|
}
|
|
|
|
// If we advanced to the next line then check if we should switch to the
|
|
// overflow line list.
|
|
if (haveAdvancedToNextLine) {
|
|
if (line != line_end && !searchingOverflowList &&
|
|
!line->Contains(deletedNextContinuation)) {
|
|
// We have advanced to the next *normal* line but the next-in-flow
|
|
// is not there - force a switch to the overflow line list.
|
|
line = line_end;
|
|
}
|
|
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: now on %s line=%p\n",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY) && line.next() != line_end) {
|
|
line.next()->MarkDirty();
|
|
line.next()->SetInvalidateTextRuns(true);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
// Advance to next flow block if the frame has more continuations
|
|
RemoveBlockChild(aDeletedFrame, !(aFlags & REMOVE_FIXED_CONTINUATIONS));
|
|
}
|
|
|
|
static bool
|
|
FindBlockLineFor(nsIFrame* aChild,
|
|
nsLineList::iterator aBegin,
|
|
nsLineList::iterator aEnd,
|
|
nsLineList::iterator* aResult)
|
|
{
|
|
MOZ_ASSERT(aChild->IsBlockOutside());
|
|
for (nsLineList::iterator line = aBegin; line != aEnd; ++line) {
|
|
MOZ_ASSERT(line->GetChildCount() > 0);
|
|
if (line->IsBlock() && line->mFirstChild == aChild) {
|
|
MOZ_ASSERT(line->GetChildCount() == 1);
|
|
*aResult = line;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
FindInlineLineFor(nsIFrame* aChild,
|
|
const nsFrameList& aFrameList,
|
|
nsLineList::iterator aBegin,
|
|
nsLineList::iterator aEnd,
|
|
nsLineList::iterator* aResult)
|
|
{
|
|
MOZ_ASSERT(!aChild->IsBlockOutside());
|
|
for (nsLineList::iterator line = aBegin; line != aEnd; ++line) {
|
|
MOZ_ASSERT(line->GetChildCount() > 0);
|
|
if (!line->IsBlock()) {
|
|
// Optimize by comparing the line's last child first.
|
|
nsLineList::iterator next = line.next();
|
|
if (aChild == (next == aEnd ? aFrameList.LastChild()
|
|
: next->mFirstChild->GetPrevSibling()) ||
|
|
line->Contains(aChild)) {
|
|
*aResult = line;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
FindLineFor(nsIFrame* aChild,
|
|
const nsFrameList& aFrameList,
|
|
nsLineList::iterator aBegin,
|
|
nsLineList::iterator aEnd,
|
|
nsLineList::iterator* aResult)
|
|
{
|
|
return aChild->IsBlockOutside() ?
|
|
FindBlockLineFor(aChild, aBegin, aEnd, aResult) :
|
|
FindInlineLineFor(aChild, aFrameList, aBegin, aEnd, aResult);
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::StealFrame(nsIFrame* aChild)
|
|
{
|
|
MOZ_ASSERT(aChild->GetParent() == this);
|
|
|
|
if ((aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
|
|
aChild->IsFloating()) {
|
|
RemoveFloat(aChild);
|
|
return NS_OK;
|
|
}
|
|
|
|
if (MaybeStealOverflowContainerFrame(aChild)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
MOZ_ASSERT(!(aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW));
|
|
|
|
nsLineList::iterator line;
|
|
if (FindLineFor(aChild, mFrames, mLines.begin(), mLines.end(), &line)) {
|
|
RemoveFrameFromLine(aChild, line, mFrames, mLines);
|
|
} else {
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
DebugOnly<bool> found;
|
|
found = FindLineFor(aChild, overflowLines->mFrames,
|
|
overflowLines->mLines.begin(),
|
|
overflowLines->mLines.end(), &line);
|
|
MOZ_ASSERT(found);
|
|
RemoveFrameFromLine(aChild, line, overflowLines->mFrames,
|
|
overflowLines->mLines);
|
|
if (overflowLines->mLines.empty()) {
|
|
DestroyOverflowLines();
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RemoveFrameFromLine(nsIFrame* aChild, nsLineList::iterator aLine,
|
|
nsFrameList& aFrameList, nsLineList& aLineList)
|
|
{
|
|
aFrameList.RemoveFrame(aChild);
|
|
if (aChild == aLine->mFirstChild) {
|
|
aLine->mFirstChild = aChild->GetNextSibling();
|
|
}
|
|
aLine->NoteFrameRemoved(aChild);
|
|
if (aLine->GetChildCount() > 0) {
|
|
aLine->MarkDirty();
|
|
} else {
|
|
// The line became empty - destroy it.
|
|
nsLineBox* lineBox = aLine;
|
|
aLine = aLineList.erase(aLine);
|
|
if (aLine != aLineList.end()) {
|
|
aLine->MarkPreviousMarginDirty();
|
|
}
|
|
FreeLineBox(lineBox);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteNextInFlowChild(nsIFrame* aNextInFlow,
|
|
bool aDeletingEmptyFrames)
|
|
{
|
|
NS_PRECONDITION(aNextInFlow->GetPrevInFlow(), "bad next-in-flow");
|
|
|
|
if (aNextInFlow->GetStateBits() &
|
|
(NS_FRAME_OUT_OF_FLOW | NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
nsContainerFrame::DeleteNextInFlowChild(aNextInFlow, aDeletingEmptyFrames);
|
|
}
|
|
else {
|
|
#ifdef DEBUG
|
|
if (aDeletingEmptyFrames) {
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(aNextInFlow);
|
|
}
|
|
#endif
|
|
DoRemoveFrame(aNextInFlow,
|
|
aDeletingEmptyFrames ? FRAMES_ARE_EMPTY : 0);
|
|
}
|
|
}
|
|
|
|
const nsStyleText*
|
|
nsBlockFrame::StyleTextForLineLayout()
|
|
{
|
|
// Return the pointer to an unmodified style text
|
|
return StyleText();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// Float support
|
|
|
|
LogicalRect
|
|
nsBlockFrame::AdjustFloatAvailableSpace(BlockReflowInput& aState,
|
|
const LogicalRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloatFrame)
|
|
{
|
|
// Compute the available inline size. By default, assume the inline
|
|
// size of the containing block.
|
|
nscoord availISize;
|
|
const nsStyleDisplay* floatDisplay = aFloatFrame->StyleDisplay();
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
|
|
if (mozilla::StyleDisplay::Table != floatDisplay->mDisplay ||
|
|
eCompatibility_NavQuirks != aState.mPresContext->CompatibilityMode() ) {
|
|
availISize = aState.ContentISize();
|
|
}
|
|
else {
|
|
// This quirk matches the one in BlockReflowInput::FlowAndPlaceFloat
|
|
// give tables only the available space
|
|
// if they can shrink we may not be constrained to place
|
|
// them in the next line
|
|
availISize = aFloatAvailableSpace.ISize(wm);
|
|
}
|
|
|
|
nscoord availBSize = NS_UNCONSTRAINEDSIZE == aState.ContentBSize()
|
|
? NS_UNCONSTRAINEDSIZE
|
|
: std::max(0, aState.ContentBEnd() - aState.mBCoord);
|
|
|
|
if (availBSize != NS_UNCONSTRAINEDSIZE &&
|
|
!aState.mFlags.mFloatFragmentsInsideColumnEnabled &&
|
|
nsLayoutUtils::GetClosestFrameOfType(this, nsGkAtoms::columnSetFrame)) {
|
|
// Tell the float it has unrestricted block-size, so it won't break.
|
|
// If the float doesn't actually fit in the column it will fail to be
|
|
// placed, and either move to the block-start of the next column or just
|
|
// overflow.
|
|
availBSize = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
|
|
return LogicalRect(wm, aState.ContentIStart(), aState.ContentBStart(),
|
|
availISize, availBSize);
|
|
}
|
|
|
|
nscoord
|
|
nsBlockFrame::ComputeFloatISize(BlockReflowInput& aState,
|
|
const LogicalRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloat)
|
|
{
|
|
NS_PRECONDITION(aFloat->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"aFloat must be an out-of-flow frame");
|
|
// Reflow the float.
|
|
LogicalRect availSpace = AdjustFloatAvailableSpace(aState,
|
|
aFloatAvailableSpace,
|
|
aFloat);
|
|
|
|
WritingMode blockWM = aState.mReflowInput.GetWritingMode();
|
|
WritingMode floatWM = aFloat->GetWritingMode();
|
|
ReflowInput
|
|
floatRS(aState.mPresContext, aState.mReflowInput, aFloat,
|
|
availSpace.Size(blockWM).ConvertTo(floatWM, blockWM));
|
|
|
|
return floatRS.ComputedSizeWithMarginBorderPadding(blockWM).ISize(blockWM);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowFloat(BlockReflowInput& aState,
|
|
const LogicalRect& aAdjustedAvailableSpace,
|
|
nsIFrame* aFloat,
|
|
LogicalMargin& aFloatMargin,
|
|
LogicalMargin& aFloatOffsets,
|
|
bool aFloatPushedDown,
|
|
nsReflowStatus& aReflowStatus)
|
|
{
|
|
NS_PRECONDITION(aFloat->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"aFloat must be an out-of-flow frame");
|
|
// Reflow the float.
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
#ifdef NOISY_FLOAT
|
|
printf("Reflow Float %p in parent %p, availSpace(%d,%d,%d,%d)\n",
|
|
aFloat, this,
|
|
aAdjustedAvailableSpace.IStart(wm), aAdjustedAvailableSpace.BStart(wm),
|
|
aAdjustedAvailableSpace.ISize(wm), aAdjustedAvailableSpace.BSize(wm)
|
|
);
|
|
#endif
|
|
|
|
ReflowInput
|
|
floatRS(aState.mPresContext, aState.mReflowInput, aFloat,
|
|
aAdjustedAvailableSpace.Size(wm).ConvertTo(aFloat->GetWritingMode(),
|
|
wm));
|
|
|
|
// Normally the mIsTopOfPage state is copied from the parent reflow
|
|
// state. However, when reflowing a float, if we've placed other
|
|
// floats that force this float *down* or *narrower*, we should unset
|
|
// the mIsTopOfPage state.
|
|
// FIXME: This is somewhat redundant with the |isAdjacentWithTop|
|
|
// variable below, which has the exact same effect. Perhaps it should
|
|
// be merged into that, except that the test for narrowing here is not
|
|
// about adjacency with the top, so it seems misleading.
|
|
if (floatRS.mFlags.mIsTopOfPage &&
|
|
(aFloatPushedDown ||
|
|
aAdjustedAvailableSpace.ISize(wm) != aState.ContentISize())) {
|
|
floatRS.mFlags.mIsTopOfPage = false;
|
|
}
|
|
|
|
// Setup a block reflow context to reflow the float.
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowInput);
|
|
|
|
// Reflow the float
|
|
bool isAdjacentWithTop = aState.IsAdjacentWithTop();
|
|
|
|
nsIFrame* clearanceFrame = nullptr;
|
|
do {
|
|
nsCollapsingMargin margin;
|
|
bool mayNeedRetry = false;
|
|
floatRS.mDiscoveredClearance = nullptr;
|
|
// Only first in flow gets a block-start margin.
|
|
if (!aFloat->GetPrevInFlow()) {
|
|
brc.ComputeCollapsedBStartMargin(floatRS, &margin,
|
|
clearanceFrame,
|
|
&mayNeedRetry);
|
|
|
|
if (mayNeedRetry && !clearanceFrame) {
|
|
floatRS.mDiscoveredClearance = &clearanceFrame;
|
|
// We don't need to push the float manager state because the the block has its own
|
|
// float manager that will be destroyed and recreated
|
|
}
|
|
}
|
|
|
|
brc.ReflowBlock(aAdjustedAvailableSpace, true, margin,
|
|
0, isAdjacentWithTop,
|
|
nullptr, floatRS,
|
|
aReflowStatus, aState);
|
|
} while (clearanceFrame);
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(aReflowStatus) &&
|
|
ShouldAvoidBreakInside(floatRS)) {
|
|
aReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
} else if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus) &&
|
|
(NS_UNCONSTRAINEDSIZE == aAdjustedAvailableSpace.BSize(wm))) {
|
|
// An incomplete reflow status means we should split the float
|
|
// if the height is constrained (bug 145305).
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
|
|
if (aReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
if (aFloat->GetType() == nsGkAtoms::letterFrame) {
|
|
// We never split floating first letters; an incomplete state for
|
|
// such frames simply means that there is more content to be
|
|
// reflowed on the line.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
|
|
// Capture the margin and offsets information for the caller
|
|
aFloatMargin =
|
|
// float margins don't collapse
|
|
floatRS.ComputedLogicalMargin().ConvertTo(wm, floatRS.GetWritingMode());
|
|
aFloatOffsets =
|
|
floatRS.ComputedLogicalOffsets().ConvertTo(wm, floatRS.GetWritingMode());
|
|
|
|
const ReflowOutput& metrics = brc.GetMetrics();
|
|
|
|
// Set the rect, make sure the view is properly sized and positioned,
|
|
// and tell the frame we're done reflowing it
|
|
// XXXldb This seems like the wrong place to be doing this -- shouldn't
|
|
// we be doing this in BlockReflowInput::FlowAndPlaceFloat after
|
|
// we've positioned the float, and shouldn't we be doing the equivalent
|
|
// of |PlaceFrameView| here?
|
|
WritingMode metricsWM = metrics.GetWritingMode();
|
|
aFloat->SetSize(metricsWM, metrics.Size(metricsWM));
|
|
if (aFloat->HasView()) {
|
|
nsContainerFrame::SyncFrameViewAfterReflow(aState.mPresContext, aFloat,
|
|
aFloat->GetView(),
|
|
metrics.VisualOverflow(),
|
|
NS_FRAME_NO_MOVE_VIEW);
|
|
}
|
|
// Pass floatRS so the frame hierarchy can be used (redoFloatRS has the same hierarchy)
|
|
aFloat->DidReflow(aState.mPresContext, &floatRS,
|
|
nsDidReflowStatus::FINISHED);
|
|
|
|
#ifdef NOISY_FLOAT
|
|
printf("end ReflowFloat %p, sized to %d,%d\n",
|
|
aFloat, metrics.Width(), metrics.Height());
|
|
#endif
|
|
}
|
|
|
|
StyleClear
|
|
nsBlockFrame::FindTrailingClear()
|
|
{
|
|
// find the break type of the last line
|
|
for (nsIFrame* b = this; b; b = b->GetPrevInFlow()) {
|
|
nsBlockFrame* block = static_cast<nsBlockFrame*>(b);
|
|
LineIterator endLine = block->LinesEnd();
|
|
if (endLine != block->LinesBegin()) {
|
|
--endLine;
|
|
return endLine->GetBreakTypeAfter();
|
|
}
|
|
}
|
|
return StyleClear::None;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowPushedFloats(BlockReflowInput& aState,
|
|
nsOverflowAreas& aOverflowAreas,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
// Pushed floats live at the start of our float list; see comment
|
|
// above nsBlockFrame::DrainPushedFloats.
|
|
nsIFrame* f = mFloats.FirstChild();
|
|
nsIFrame* prev = nullptr;
|
|
while (f && (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT)) {
|
|
MOZ_ASSERT(prev == f->GetPrevSibling());
|
|
// When we push a first-continuation float in a non-initial reflow,
|
|
// it's possible that we end up with two continuations with the same
|
|
// parent. This happens if, on the previous reflow of the block or
|
|
// a previous reflow of the line containing the block, the float was
|
|
// split between continuations A and B of the parent, but on the
|
|
// current reflow, none of the float can fit in A.
|
|
//
|
|
// When this happens, we might even have the two continuations
|
|
// out-of-order due to the management of the pushed floats. In
|
|
// particular, if the float's placeholder was in a pushed line that
|
|
// we reflowed before it was pushed, and we split the float during
|
|
// that reflow, we might have the continuation of the float before
|
|
// the float itself. (In the general case, however, it's correct
|
|
// for floats in the pushed floats list to come before floats
|
|
// anchored in pushed lines; however, in this case it's wrong. We
|
|
// should probably find a way to fix it somehow, since it leads to
|
|
// incorrect layout in some cases.)
|
|
//
|
|
// When we have these out-of-order continuations, we might hit the
|
|
// next-continuation before the previous-continuation. When that
|
|
// happens, just push it. When we reflow the next continuation,
|
|
// we'll either pull all of its content back and destroy it (by
|
|
// calling DeleteNextInFlowChild), or nsBlockFrame::SplitFloat will
|
|
// pull it out of its current position and push it again (and
|
|
// potentially repeat this cycle for the next continuation, although
|
|
// hopefully then they'll be in the right order).
|
|
//
|
|
// We should also need this code for the in-order case if the first
|
|
// continuation of a float gets moved across more than one
|
|
// continuation of the containing block. In this case we'd manage
|
|
// to push the second continuation without this check, but not the
|
|
// third and later.
|
|
nsIFrame *prevContinuation = f->GetPrevContinuation();
|
|
if (prevContinuation && prevContinuation->GetParent() == f->GetParent()) {
|
|
mFloats.RemoveFrame(f);
|
|
aState.AppendPushedFloatChain(f);
|
|
f = !prev ? mFloats.FirstChild() : prev->GetNextSibling();
|
|
continue;
|
|
}
|
|
|
|
// Always call FlowAndPlaceFloat; we might need to place this float
|
|
// if didn't belong to this block the last time it was reflowed.
|
|
aState.FlowAndPlaceFloat(f);
|
|
ConsiderChildOverflow(aOverflowAreas, f);
|
|
|
|
nsIFrame* next = !prev ? mFloats.FirstChild() : prev->GetNextSibling();
|
|
if (next == f) {
|
|
// We didn't push |f| so its next-sibling is next.
|
|
next = f->GetNextSibling();
|
|
prev = f;
|
|
} // else: we did push |f| so |prev|'s new next-sibling is next.
|
|
f = next;
|
|
}
|
|
|
|
// If there are continued floats, then we may need to continue BR clearance
|
|
if (0 != aState.ClearFloats(0, StyleClear::Both)) {
|
|
nsBlockFrame* prevBlock = static_cast<nsBlockFrame*>(GetPrevInFlow());
|
|
if (prevBlock) {
|
|
aState.mFloatBreakType = prevBlock->FindTrailingClear();
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RecoverFloats(nsFloatManager& aFloatManager, WritingMode aWM,
|
|
const nsSize& aContainerSize)
|
|
{
|
|
// Recover our own floats
|
|
nsIFrame* stop = nullptr; // Stop before we reach pushed floats that
|
|
// belong to our next-in-flow
|
|
for (nsIFrame* f = mFloats.FirstChild(); f && f != stop; f = f->GetNextSibling()) {
|
|
LogicalRect region = nsFloatManager::GetRegionFor(aWM, f, aContainerSize);
|
|
aFloatManager.AddFloat(f, region, aWM, aContainerSize);
|
|
if (!stop && f->GetNextInFlow())
|
|
stop = f->GetNextInFlow();
|
|
}
|
|
|
|
// Recurse into our overflow container children
|
|
for (nsIFrame* oc = GetChildList(kOverflowContainersList).FirstChild();
|
|
oc; oc = oc->GetNextSibling()) {
|
|
RecoverFloatsFor(oc, aFloatManager, aWM, aContainerSize);
|
|
}
|
|
|
|
// Recurse into our normal children
|
|
for (nsBlockFrame::LineIterator line = LinesBegin(); line != LinesEnd(); ++line) {
|
|
if (line->IsBlock()) {
|
|
RecoverFloatsFor(line->mFirstChild, aFloatManager, aWM, aContainerSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RecoverFloatsFor(nsIFrame* aFrame,
|
|
nsFloatManager& aFloatManager,
|
|
WritingMode aWM,
|
|
const nsSize& aContainerSize)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null frame");
|
|
// Only blocks have floats
|
|
nsBlockFrame* block = nsLayoutUtils::GetAsBlock(aFrame);
|
|
// Don't recover any state inside a block that has its own space manager
|
|
// (we don't currently have any blocks like this, though, thanks to our
|
|
// use of extra frames for 'overflow')
|
|
if (block && !nsBlockFrame::BlockNeedsFloatManager(block)) {
|
|
// If the element is relatively positioned, then adjust x and y
|
|
// accordingly so that we consider relatively positioned frames
|
|
// at their original position.
|
|
|
|
LogicalRect rect(aWM, block->GetNormalRect(), aContainerSize);
|
|
nscoord lineLeft = rect.LineLeft(aWM, aContainerSize);
|
|
nscoord blockStart = rect.BStart(aWM);
|
|
aFloatManager.Translate(lineLeft, blockStart);
|
|
block->RecoverFloats(aFloatManager, aWM, aContainerSize);
|
|
aFloatManager.Translate(-lineLeft, -blockStart);
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Painting, event handling
|
|
|
|
#ifdef DEBUG
|
|
static void ComputeVisualOverflowArea(nsLineList& aLines,
|
|
nscoord aWidth, nscoord aHeight,
|
|
nsRect& aResult)
|
|
{
|
|
nscoord xa = 0, ya = 0, xb = aWidth, yb = aHeight;
|
|
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
|
|
line != line_end;
|
|
++line) {
|
|
// Compute min and max x/y values for the reflowed frame's
|
|
// combined areas
|
|
nsRect visOverflow(line->GetVisualOverflowArea());
|
|
nscoord x = visOverflow.x;
|
|
nscoord y = visOverflow.y;
|
|
nscoord xmost = x + visOverflow.width;
|
|
nscoord ymost = y + visOverflow.height;
|
|
if (x < xa) {
|
|
xa = x;
|
|
}
|
|
if (xmost > xb) {
|
|
xb = xmost;
|
|
}
|
|
if (y < ya) {
|
|
ya = y;
|
|
}
|
|
if (ymost > yb) {
|
|
yb = ymost;
|
|
}
|
|
}
|
|
|
|
aResult.x = xa;
|
|
aResult.y = ya;
|
|
aResult.width = xb - xa;
|
|
aResult.height = yb - ya;
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
nsBlockFrame::IsVisibleInSelection(nsISelection* aSelection)
|
|
{
|
|
if (mContent->IsAnyOfHTMLElements(nsGkAtoms::html, nsGkAtoms::body))
|
|
return true;
|
|
|
|
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
|
|
bool visible;
|
|
nsresult rv = aSelection->ContainsNode(node, true, &visible);
|
|
return NS_SUCCEEDED(rv) && visible;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void DebugOutputDrawLine(int32_t aDepth, nsLineBox* aLine, bool aDrawn) {
|
|
if (nsBlockFrame::gNoisyDamageRepair) {
|
|
nsFrame::IndentBy(stdout, aDepth+1);
|
|
nsRect lineArea = aLine->GetVisualOverflowArea();
|
|
printf("%s line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
aDrawn ? "draw" : "skip",
|
|
static_cast<void*>(aLine),
|
|
aLine->IStart(), aLine->BStart(),
|
|
aLine->ISize(), aLine->BSize(),
|
|
lineArea.x, lineArea.y,
|
|
lineArea.width, lineArea.height);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
DisplayLine(nsDisplayListBuilder* aBuilder, const nsRect& aLineArea,
|
|
nsBlockFrame::LineIterator& aLine,
|
|
int32_t aDepth, int32_t& aDrawnLines, const nsDisplayListSet& aLists,
|
|
nsBlockFrame* aFrame, TextOverflow* aTextOverflow) {
|
|
// If the line's combined area (which includes child frames that
|
|
// stick outside of the line's bounding box or our bounding box)
|
|
// intersects the dirty rect then paint the line.
|
|
bool intersect = aLineArea.Intersects(aBuilder->GetDirtyRect());
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gLamePaintMetrics) {
|
|
aDrawnLines++;
|
|
}
|
|
DebugOutputDrawLine(aDepth, aLine.get(), intersect);
|
|
#endif
|
|
// The line might contain a placeholder for a visible out-of-flow, in which
|
|
// case we need to descend into it. If there is such a placeholder, we will
|
|
// have NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO set.
|
|
// In particular, we really want to check ShouldDescendIntoFrame()
|
|
// on all the frames on the line, but that might be expensive. So
|
|
// we approximate it by checking it on aFrame; if it's true for any
|
|
// frame in the line, it's also true for aFrame.
|
|
bool lineInline = aLine->IsInline();
|
|
bool lineMayHaveTextOverflow = aTextOverflow && lineInline;
|
|
if (!intersect && !aBuilder->ShouldDescendIntoFrame(aFrame) &&
|
|
!lineMayHaveTextOverflow)
|
|
return;
|
|
|
|
// Collect our line's display items in a temporary nsDisplayListCollection,
|
|
// so that we can apply any "text-overflow" clipping to the entire collection
|
|
// without affecting previous lines.
|
|
nsDisplayListCollection collection(aBuilder);
|
|
|
|
// Block-level child backgrounds go on the blockBorderBackgrounds list ...
|
|
// Inline-level child backgrounds go on the regular child content list.
|
|
nsDisplayListSet childLists(collection,
|
|
lineInline ? collection.Content() : collection.BlockBorderBackgrounds());
|
|
|
|
uint32_t flags = lineInline ? nsIFrame::DISPLAY_CHILD_INLINE : 0;
|
|
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
int32_t n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
aFrame->BuildDisplayListForChild(aBuilder, kid, childLists, flags);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
|
|
if (lineMayHaveTextOverflow) {
|
|
aTextOverflow->ProcessLine(collection, aLine.get());
|
|
}
|
|
|
|
collection.MoveTo(aLists);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsDisplayListSet& aLists)
|
|
{
|
|
int32_t drawnLines; // Will only be used if set (gLamePaintMetrics).
|
|
int32_t depth = 0;
|
|
#ifdef DEBUG
|
|
if (gNoisyDamageRepair) {
|
|
nsRect dirty = aBuilder->GetDirtyRect();
|
|
depth = GetDepth();
|
|
nsRect ca;
|
|
::ComputeVisualOverflowArea(mLines, mRect.width, mRect.height, ca);
|
|
nsFrame::IndentBy(stdout, depth);
|
|
ListTag(stdout);
|
|
printf(": bounds=%d,%d,%d,%d dirty(absolute)=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
mRect.x, mRect.y, mRect.width, mRect.height,
|
|
dirty.x, dirty.y, dirty.width, dirty.height,
|
|
ca.x, ca.y, ca.width, ca.height);
|
|
}
|
|
PRTime start = 0; // Initialize these variables to silence the compiler.
|
|
if (gLamePaintMetrics) {
|
|
start = PR_Now();
|
|
drawnLines = 0;
|
|
}
|
|
#endif
|
|
|
|
DisplayBorderBackgroundOutline(aBuilder, aLists);
|
|
|
|
if (GetPrevInFlow()) {
|
|
DisplayOverflowContainers(aBuilder, aLists);
|
|
for (nsIFrame* f : mFloats) {
|
|
if (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT)
|
|
BuildDisplayListForChild(aBuilder, f, aLists);
|
|
}
|
|
}
|
|
|
|
aBuilder->MarkFramesForDisplayList(this, mFloats);
|
|
|
|
// Prepare for text-overflow processing.
|
|
UniquePtr<TextOverflow> textOverflow(
|
|
TextOverflow::WillProcessLines(aBuilder, this));
|
|
|
|
// We'll collect our lines' display items here, & then append this to aLists.
|
|
nsDisplayListCollection linesDisplayListCollection(aBuilder);
|
|
|
|
// Don't use the line cursor if we might have a descendant placeholder ...
|
|
// it might skip lines that contain placeholders but don't themselves
|
|
// intersect with the dirty area.
|
|
// In particular, we really want to check ShouldDescendIntoFrame()
|
|
// on all our child frames, but that might be expensive. So we
|
|
// approximate it by checking it on |this|; if it's true for any
|
|
// frame in our child list, it's also true for |this|.
|
|
nsLineBox* cursor = aBuilder->ShouldDescendIntoFrame(this) ?
|
|
nullptr : GetFirstLineContaining(aBuilder->GetDirtyRect().y);
|
|
LineIterator line_end = LinesEnd();
|
|
|
|
if (cursor) {
|
|
for (LineIterator line = mLines.begin(cursor);
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetVisualOverflowArea();
|
|
if (!lineArea.IsEmpty()) {
|
|
// Because we have a cursor, the combinedArea.ys are non-decreasing.
|
|
// Once we've passed aDirtyRect.YMost(), we can never see it again.
|
|
if (lineArea.y >= aBuilder->GetDirtyRect().YMost()) {
|
|
break;
|
|
}
|
|
DisplayLine(aBuilder, lineArea, line, depth, drawnLines,
|
|
linesDisplayListCollection, this, textOverflow.get());
|
|
}
|
|
}
|
|
} else {
|
|
bool nonDecreasingYs = true;
|
|
int32_t lineCount = 0;
|
|
nscoord lastY = INT32_MIN;
|
|
nscoord lastYMost = INT32_MIN;
|
|
for (LineIterator line = LinesBegin();
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetVisualOverflowArea();
|
|
DisplayLine(aBuilder, lineArea, line, depth, drawnLines,
|
|
linesDisplayListCollection, this, textOverflow.get());
|
|
if (!lineArea.IsEmpty()) {
|
|
if (lineArea.y < lastY
|
|
|| lineArea.YMost() < lastYMost) {
|
|
nonDecreasingYs = false;
|
|
}
|
|
lastY = lineArea.y;
|
|
lastYMost = lineArea.YMost();
|
|
}
|
|
lineCount++;
|
|
}
|
|
|
|
if (nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
|
|
SetupLineCursor();
|
|
}
|
|
}
|
|
|
|
// Pick up the resulting text-overflow markers. We append them to
|
|
// PositionedDescendants just before we append the lines' display items,
|
|
// so that our text-overflow markers will appear on top of this block's
|
|
// normal content but below any of its its' positioned children.
|
|
if (textOverflow) {
|
|
aLists.PositionedDescendants()->AppendToTop(&textOverflow->GetMarkers());
|
|
}
|
|
linesDisplayListCollection.MoveTo(aLists);
|
|
|
|
if (HasOutsideBullet()) {
|
|
// Display outside bullets manually
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
BuildDisplayListForChild(aBuilder, bullet, aLists);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gLamePaintMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
int32_t numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime lines, deltaPerLine, delta;
|
|
lines = int64_t(numLines);
|
|
delta = end - start;
|
|
deltaPerLine = delta / lines;
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
SprintfLiteral(buf,
|
|
": %" PRId64 " elapsed (%" PRId64 " per line) lines=%d drawn=%d skip=%d",
|
|
delta, deltaPerLine,
|
|
numLines, drawnLines, numLines - drawnLines);
|
|
printf("%s\n", buf);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
a11y::AccType
|
|
nsBlockFrame::AccessibleType()
|
|
{
|
|
if (IsTableCaption()) {
|
|
return GetRect().IsEmpty() ? a11y::eNoType : a11y::eHTMLCaptionType;
|
|
}
|
|
|
|
// block frame may be for <hr>
|
|
if (mContent->IsHTMLElement(nsGkAtoms::hr)) {
|
|
return a11y::eHTMLHRType;
|
|
}
|
|
|
|
if (!HasBullet() || !PresContext()) {
|
|
//XXXsmaug What if we're in the shadow dom?
|
|
if (!mContent->GetParent()) {
|
|
// Don't create accessible objects for the root content node, they are redundant with
|
|
// the nsDocAccessible object created with the document node
|
|
return a11y::eNoType;
|
|
}
|
|
|
|
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc =
|
|
do_QueryInterface(mContent->GetComposedDoc());
|
|
if (htmlDoc) {
|
|
nsCOMPtr<nsIDOMHTMLElement> body;
|
|
htmlDoc->GetBody(getter_AddRefs(body));
|
|
if (SameCOMIdentity(body, mContent)) {
|
|
// Don't create accessible objects for the body, they are redundant with
|
|
// the nsDocAccessible object created with the document node
|
|
return a11y::eNoType;
|
|
}
|
|
}
|
|
|
|
// Not a bullet, treat as normal HTML container
|
|
return a11y::eHyperTextType;
|
|
}
|
|
|
|
// Create special list bullet accessible
|
|
return a11y::eHTMLLiType;
|
|
}
|
|
#endif
|
|
|
|
void nsBlockFrame::ClearLineCursor()
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return;
|
|
}
|
|
|
|
DeleteProperty(LineCursorProperty());
|
|
RemoveStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
void nsBlockFrame::SetupLineCursor()
|
|
{
|
|
if (GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR
|
|
|| mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
SetProperty(LineCursorProperty(), mLines.front());
|
|
AddStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
nsLineBox* nsBlockFrame::GetFirstLineContaining(nscoord y)
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsLineBox* property = GetProperty(LineCursorProperty());
|
|
LineIterator cursor = mLines.begin(property);
|
|
nsRect cursorArea = cursor->GetVisualOverflowArea();
|
|
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() > y)
|
|
&& cursor != mLines.front()) {
|
|
cursor = cursor.prev();
|
|
cursorArea = cursor->GetVisualOverflowArea();
|
|
}
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() <= y)
|
|
&& cursor != mLines.back()) {
|
|
cursor = cursor.next();
|
|
cursorArea = cursor->GetVisualOverflowArea();
|
|
}
|
|
|
|
if (cursor.get() != property) {
|
|
SetProperty(LineCursorProperty(), cursor.get());
|
|
}
|
|
|
|
return cursor.get();
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsBlockFrame::ChildIsDirty(nsIFrame* aChild)
|
|
{
|
|
// See if the child is absolutely positioned
|
|
if (aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW &&
|
|
aChild->IsAbsolutelyPositioned()) {
|
|
// do nothing
|
|
} else if (aChild == GetOutsideBullet()) {
|
|
// The bullet lives in the first line, unless the first line has
|
|
// height 0 and there is a second line, in which case it lives
|
|
// in the second line.
|
|
LineIterator bulletLine = LinesBegin();
|
|
if (bulletLine != LinesEnd() && bulletLine->BSize() == 0 &&
|
|
bulletLine != mLines.back()) {
|
|
bulletLine = bulletLine.next();
|
|
}
|
|
|
|
if (bulletLine != LinesEnd()) {
|
|
MarkLineDirty(bulletLine, &mLines);
|
|
}
|
|
// otherwise we have an empty line list, and ReflowDirtyLines
|
|
// will handle reflowing the bullet.
|
|
} else {
|
|
// Note that we should go through our children to mark lines dirty
|
|
// before the next reflow. Doing it now could make things O(N^2)
|
|
// since finding the right line is O(N).
|
|
// We don't need to worry about marking lines on the overflow list
|
|
// as dirty; we're guaranteed to reflow them if we take them off the
|
|
// overflow list.
|
|
// However, we might have gotten a float, in which case we need to
|
|
// reflow the line containing its placeholder. So find the
|
|
// ancestor-or-self of the placeholder that's a child of the block,
|
|
// and mark it as NS_FRAME_HAS_DIRTY_CHILDREN too, so that we mark
|
|
// its line dirty when we handle NS_BLOCK_LOOK_FOR_DIRTY_FRAMES.
|
|
// We need to take some care to handle the case where a float is in
|
|
// a different continuation than its placeholder, including marking
|
|
// an extra block with NS_BLOCK_LOOK_FOR_DIRTY_FRAMES.
|
|
if (!(aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
AddStateBits(NS_BLOCK_LOOK_FOR_DIRTY_FRAMES);
|
|
} else {
|
|
NS_ASSERTION(aChild->IsFloating(), "should be a float");
|
|
nsIFrame* thisFC = FirstContinuation();
|
|
nsIFrame* placeholderPath = aChild->GetPlaceholderFrame();
|
|
// SVG code sometimes sends FrameNeedsReflow notifications during
|
|
// frame destruction, leading to null placeholders, but we're safe
|
|
// ignoring those.
|
|
if (placeholderPath) {
|
|
for (;;) {
|
|
nsIFrame *parent = placeholderPath->GetParent();
|
|
if (parent->GetContent() == mContent &&
|
|
parent->FirstContinuation() == thisFC) {
|
|
parent->AddStateBits(NS_BLOCK_LOOK_FOR_DIRTY_FRAMES);
|
|
break;
|
|
}
|
|
placeholderPath = parent;
|
|
}
|
|
placeholderPath->AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsContainerFrame::ChildIsDirty(aChild);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
if (aPrevInFlow) {
|
|
// Copy over the inherited block frame bits from the prev-in-flow.
|
|
RemoveStateBits(NS_BLOCK_FLAGS_MASK);
|
|
AddStateBits(aPrevInFlow->GetStateBits() &
|
|
(NS_BLOCK_FLAGS_MASK & ~NS_BLOCK_FLAGS_NON_INHERITED_MASK));
|
|
}
|
|
|
|
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
|
|
|
|
if (!aPrevInFlow ||
|
|
aPrevInFlow->GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION) {
|
|
AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
|
|
}
|
|
|
|
// If a box has a different block flow direction than its containing block:
|
|
// ...
|
|
// If the box is a block container, then it establishes a new block
|
|
// formatting context.
|
|
// (http://dev.w3.org/csswg/css-writing-modes/#block-flow)
|
|
// If the box has contain: paint (or contain: strict), then it should also
|
|
// establish a formatting context.
|
|
if (StyleDisplay()->mDisplay == mozilla::StyleDisplay::FlowRoot ||
|
|
(GetParent() && StyleVisibility()->mWritingMode !=
|
|
GetParent()->StyleVisibility()->mWritingMode) ||
|
|
StyleDisplay()->IsContainPaint()) {
|
|
AddStateBits(NS_BLOCK_FORMATTING_CONTEXT_STATE_BITS);
|
|
}
|
|
|
|
if ((GetStateBits() &
|
|
(NS_FRAME_FONT_INFLATION_CONTAINER | NS_BLOCK_FLOAT_MGR)) ==
|
|
(NS_FRAME_FONT_INFLATION_CONTAINER | NS_BLOCK_FLOAT_MGR)) {
|
|
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList)
|
|
{
|
|
if (kFloatList == aListID) {
|
|
mFloats.SetFrames(aChildList);
|
|
} else if (kPrincipalList == aListID) {
|
|
NS_ASSERTION((GetStateBits() & (NS_BLOCK_FRAME_HAS_INSIDE_BULLET |
|
|
NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET)) == 0,
|
|
"how can we have a bullet already?");
|
|
|
|
#ifdef DEBUG
|
|
// The only times a block that is an anonymous box is allowed to have a
|
|
// first-letter frame are when it's the block inside a non-anonymous cell,
|
|
// the block inside a fieldset, button or column set, or a scrolled content
|
|
// block, except for <select>. Note that this means that blocks which are
|
|
// the anonymous block in {ib} splits do NOT get first-letter frames.
|
|
// Note that NS_BLOCK_HAS_FIRST_LETTER_STYLE gets set on all continuations
|
|
// of the block.
|
|
nsIAtom *pseudo = StyleContext()->GetPseudo();
|
|
bool haveFirstLetterStyle =
|
|
(!pseudo ||
|
|
(pseudo == nsCSSAnonBoxes::cellContent &&
|
|
GetParent()->StyleContext()->GetPseudo() == nullptr) ||
|
|
pseudo == nsCSSAnonBoxes::fieldsetContent ||
|
|
pseudo == nsCSSAnonBoxes::buttonContent ||
|
|
pseudo == nsCSSAnonBoxes::columnContent ||
|
|
(pseudo == nsCSSAnonBoxes::scrolledContent &&
|
|
GetParent()->GetType() != nsGkAtoms::listControlFrame) ||
|
|
pseudo == nsCSSAnonBoxes::mozSVGText) &&
|
|
GetType() != nsGkAtoms::comboboxControlFrame &&
|
|
!IsFrameOfType(eMathML) &&
|
|
RefPtr<nsStyleContext>(GetFirstLetterStyle(PresContext())) != nullptr;
|
|
NS_ASSERTION(haveFirstLetterStyle ==
|
|
((mState & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0),
|
|
"NS_BLOCK_HAS_FIRST_LETTER_STYLE state out of sync");
|
|
#endif
|
|
|
|
AddFrames(aChildList, nullptr);
|
|
|
|
// Create a list bullet if this is a list-item. Note that this is
|
|
// done here so that RenumberLists will work (it needs the bullets
|
|
// to store the bullet numbers). Also note that due to various
|
|
// wrapper frames (scrollframes, columns) we want to use the
|
|
// outermost (primary, ideally, but it's not set yet when we get
|
|
// here) frame of our content for the display check. On the other
|
|
// hand, we look at ourselves for the GetPrevInFlow() check, since
|
|
// for a columnset we don't want a bullet per column. Note that
|
|
// the outermost frame for the content is the primary frame in
|
|
// most cases; the ones when it's not (like tables) can't be
|
|
// StyleDisplay::ListItem).
|
|
nsIFrame* possibleListItem = this;
|
|
while (1) {
|
|
nsIFrame* parent = possibleListItem->GetParent();
|
|
if (parent->GetContent() != GetContent()) {
|
|
break;
|
|
}
|
|
possibleListItem = parent;
|
|
}
|
|
if (mozilla::StyleDisplay::ListItem ==
|
|
possibleListItem->StyleDisplay()->mDisplay &&
|
|
!GetPrevInFlow()) {
|
|
// Resolve style for the bullet frame
|
|
const nsStyleList* styleList = StyleList();
|
|
CounterStyle* style = styleList->GetCounterStyle();
|
|
|
|
CreateBulletFrameForListItem(
|
|
style->IsBullet(),
|
|
styleList->mListStylePosition == NS_STYLE_LIST_STYLE_POSITION_INSIDE);
|
|
}
|
|
} else {
|
|
nsContainerFrame::SetInitialChildList(aListID, aChildList);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CreateBulletFrameForListItem(bool aCreateBulletList,
|
|
bool aListStylePositionInside)
|
|
{
|
|
nsIPresShell* shell = PresContext()->PresShell();
|
|
|
|
CSSPseudoElementType pseudoType = aCreateBulletList ?
|
|
CSSPseudoElementType::mozListBullet :
|
|
CSSPseudoElementType::mozListNumber;
|
|
|
|
nsStyleContext* parentStyle =
|
|
CorrectStyleParentFrame(this,
|
|
nsCSSPseudoElements::GetPseudoAtom(pseudoType))->
|
|
StyleContext();
|
|
|
|
RefPtr<nsStyleContext> kidSC = shell->StyleSet()->
|
|
ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
|
|
parentStyle, nullptr);
|
|
|
|
// Create bullet frame
|
|
nsBulletFrame* bullet = new (shell) nsBulletFrame(kidSC);
|
|
bullet->Init(mContent, this, nullptr);
|
|
|
|
// If the list bullet frame should be positioned inside then add
|
|
// it to the flow now.
|
|
if (aListStylePositionInside) {
|
|
nsFrameList bulletList(bullet, bullet);
|
|
AddFrames(bulletList, nullptr);
|
|
SetProperty(InsideBulletProperty(), bullet);
|
|
AddStateBits(NS_BLOCK_FRAME_HAS_INSIDE_BULLET);
|
|
} else {
|
|
nsFrameList* bulletList = new (shell) nsFrameList(bullet, bullet);
|
|
SetProperty(OutsideBulletProperty(), bulletList);
|
|
AddStateBits(NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::BulletIsEmpty() const
|
|
{
|
|
NS_ASSERTION(mContent->GetPrimaryFrame()->StyleDisplay()->mDisplay ==
|
|
mozilla::StyleDisplay::ListItem && HasOutsideBullet(),
|
|
"should only care when we have an outside bullet");
|
|
const nsStyleList* list = StyleList();
|
|
return list->GetCounterStyle()->IsNone() &&
|
|
!list->GetListStyleImage();
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::GetSpokenBulletText(nsAString& aText) const
|
|
{
|
|
const nsStyleList* myList = StyleList();
|
|
if (myList->GetListStyleImage()) {
|
|
aText.Assign(kDiscCharacter);
|
|
aText.Append(' ');
|
|
} else {
|
|
nsBulletFrame* bullet = GetBullet();
|
|
if (bullet) {
|
|
bullet->GetSpokenText(aText);
|
|
} else {
|
|
aText.Truncate();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::RenumberChildFrames(int32_t* aOrdinal,
|
|
int32_t aDepth,
|
|
int32_t aIncrement,
|
|
bool aForCounting)
|
|
{
|
|
// Examine each line in the block
|
|
bool foundValidLine;
|
|
nsBlockInFlowLineIterator bifLineIter(this, &foundValidLine);
|
|
if (!foundValidLine) {
|
|
return false;
|
|
}
|
|
|
|
bool renumberedABullet = false;
|
|
do {
|
|
nsLineList::iterator line = bifLineIter.GetLine();
|
|
nsIFrame* kid = line->mFirstChild;
|
|
int32_t n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
bool kidRenumberedABullet =
|
|
kid->RenumberFrameAndDescendants(aOrdinal, aDepth, aIncrement, aForCounting);
|
|
if (!aForCounting && kidRenumberedABullet) {
|
|
line->MarkDirty();
|
|
renumberedABullet = true;
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
} while (bifLineIter.Next());
|
|
|
|
// We need to set NS_FRAME_HAS_DIRTY_CHILDREN bits up the tree between
|
|
// the bullet and the caller of RenumberLists. But the caller itself
|
|
// has to be responsible for setting the bit itself, since that caller
|
|
// might be making a FrameNeedsReflow call, which requires that the
|
|
// bit not be set yet.
|
|
if (renumberedABullet && aDepth != 0) {
|
|
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
|
|
return renumberedABullet;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowBullet(nsIFrame* aBulletFrame,
|
|
BlockReflowInput& aState,
|
|
ReflowOutput& aMetrics,
|
|
nscoord aLineTop)
|
|
{
|
|
const ReflowInput &rs = aState.mReflowInput;
|
|
|
|
// Reflow the bullet now
|
|
WritingMode bulletWM = aBulletFrame->GetWritingMode();
|
|
LogicalSize availSize(bulletWM);
|
|
// Make up an inline-size since it doesn't really matter (XXX).
|
|
availSize.ISize(bulletWM) = aState.ContentISize();
|
|
availSize.BSize(bulletWM) = NS_UNCONSTRAINEDSIZE;
|
|
|
|
// Get the reason right.
|
|
// XXXwaterson Should this look just like the logic in
|
|
// nsBlockReflowContext::ReflowBlock and nsLineLayout::ReflowFrame?
|
|
ReflowInput reflowInput(aState.mPresContext, rs,
|
|
aBulletFrame, availSize);
|
|
nsReflowStatus status;
|
|
aBulletFrame->Reflow(aState.mPresContext, aMetrics, reflowInput, status);
|
|
|
|
// Get the float available space using our saved state from before we
|
|
// started reflowing the block, so that we ignore any floats inside
|
|
// the block.
|
|
// FIXME: aLineTop isn't actually set correctly by some callers, since
|
|
// they reposition the line.
|
|
LogicalRect floatAvailSpace =
|
|
aState.GetFloatAvailableSpaceWithState(aLineTop,
|
|
&aState.mFloatManagerStateBefore)
|
|
.mRect;
|
|
// FIXME (bug 25888): need to check the entire region that the first
|
|
// line overlaps, not just the top pixel.
|
|
|
|
// Place the bullet now. We want to place the bullet relative to the
|
|
// border-box of the associated block (using the right/left margin of
|
|
// the bullet frame as separation). However, if a line box would be
|
|
// displaced by floats that are *outside* the associated block, we
|
|
// want to displace it by the same amount. That is, we act as though
|
|
// the edge of the floats is the content-edge of the block, and place
|
|
// the bullet at a position offset from there by the block's padding,
|
|
// the block's border, and the bullet frame's margin.
|
|
|
|
// IStart from floatAvailSpace gives us the content/float start edge
|
|
// in the current writing mode. Then we subtract out the start
|
|
// border/padding and the bullet's width and margin to offset the position.
|
|
WritingMode wm = rs.GetWritingMode();
|
|
// Get the bullet's margin, converted to our writing mode so that we can
|
|
// combine it with other logical values here.
|
|
LogicalMargin bulletMargin =
|
|
reflowInput.ComputedLogicalMargin().ConvertTo(wm, bulletWM);
|
|
nscoord iStart = floatAvailSpace.IStart(wm) -
|
|
rs.ComputedLogicalBorderPadding().IStart(wm) -
|
|
bulletMargin.IEnd(wm) -
|
|
aMetrics.ISize(wm);
|
|
|
|
// Approximate the bullets position; vertical alignment will provide
|
|
// the final vertical location. We pass our writing-mode here, because
|
|
// it may be different from the bullet frame's mode.
|
|
nscoord bStart = floatAvailSpace.BStart(wm);
|
|
aBulletFrame->SetRect(wm, LogicalRect(wm, iStart, bStart,
|
|
aMetrics.ISize(wm),
|
|
aMetrics.BSize(wm)),
|
|
aState.ContainerSize());
|
|
aBulletFrame->DidReflow(aState.mPresContext, &aState.mReflowInput,
|
|
nsDidReflowStatus::FINISHED);
|
|
}
|
|
|
|
// This is used to scan frames for any float placeholders, add their
|
|
// floats to the list represented by aList, and remove the
|
|
// floats from whatever list they might be in. We don't search descendants
|
|
// that are float containing blocks. Floats that or not children of 'this'
|
|
// are ignored (they are not added to aList).
|
|
void
|
|
nsBlockFrame::DoCollectFloats(nsIFrame* aFrame, nsFrameList& aList,
|
|
bool aCollectSiblings)
|
|
{
|
|
while (aFrame) {
|
|
// Don't descend into float containing blocks.
|
|
if (!aFrame->IsFloatContainingBlock()) {
|
|
nsIFrame *outOfFlowFrame =
|
|
aFrame->GetType() == nsGkAtoms::placeholderFrame ?
|
|
nsLayoutUtils::GetFloatFromPlaceholder(aFrame) : nullptr;
|
|
while (outOfFlowFrame && outOfFlowFrame->GetParent() == this) {
|
|
RemoveFloat(outOfFlowFrame);
|
|
// Remove the IS_PUSHED_FLOAT bit, in case |outOfFlowFrame| came from
|
|
// the PushedFloats list.
|
|
outOfFlowFrame->RemoveStateBits(NS_FRAME_IS_PUSHED_FLOAT);
|
|
aList.AppendFrame(nullptr, outOfFlowFrame);
|
|
outOfFlowFrame = outOfFlowFrame->GetNextInFlow();
|
|
// FIXME: By not pulling floats whose parent is one of our
|
|
// later siblings, are we risking the pushed floats getting
|
|
// out-of-order?
|
|
// XXXmats nsInlineFrame's lazy reparenting depends on NOT doing that.
|
|
}
|
|
|
|
DoCollectFloats(aFrame->PrincipalChildList().FirstChild(), aList, true);
|
|
DoCollectFloats(aFrame->GetChildList(kOverflowList).FirstChild(), aList, true);
|
|
}
|
|
if (!aCollectSiblings)
|
|
break;
|
|
aFrame = aFrame->GetNextSibling();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CheckFloats(BlockReflowInput& aState)
|
|
{
|
|
#ifdef DEBUG
|
|
// If any line is still dirty, that must mean we're going to reflow this
|
|
// block again soon (e.g. because we bailed out after noticing that
|
|
// clearance was imposed), so don't worry if the floats are out of sync.
|
|
bool anyLineDirty = false;
|
|
|
|
// Check that the float list is what we would have built
|
|
AutoTArray<nsIFrame*, 8> lineFloats;
|
|
for (LineIterator line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end; ++line) {
|
|
if (line->HasFloats()) {
|
|
nsFloatCache* fc = line->GetFirstFloat();
|
|
while (fc) {
|
|
lineFloats.AppendElement(fc->mFloat);
|
|
fc = fc->Next();
|
|
}
|
|
}
|
|
if (line->IsDirty()) {
|
|
anyLineDirty = true;
|
|
}
|
|
}
|
|
|
|
AutoTArray<nsIFrame*, 8> storedFloats;
|
|
bool equal = true;
|
|
uint32_t i = 0;
|
|
for (nsIFrame* f : mFloats) {
|
|
if (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT)
|
|
continue;
|
|
storedFloats.AppendElement(f);
|
|
if (i < lineFloats.Length() && lineFloats.ElementAt(i) != f) {
|
|
equal = false;
|
|
}
|
|
++i;
|
|
}
|
|
|
|
if ((!equal || lineFloats.Length() != storedFloats.Length()) && !anyLineDirty) {
|
|
NS_WARNING("nsBlockFrame::CheckFloats: Explicit float list is out of sync with float cache");
|
|
#if defined(DEBUG_roc)
|
|
nsFrame::RootFrameList(PresContext(), stdout, 0);
|
|
for (i = 0; i < lineFloats.Length(); ++i) {
|
|
printf("Line float: %p\n", lineFloats.ElementAt(i));
|
|
}
|
|
for (i = 0; i < storedFloats.Length(); ++i) {
|
|
printf("Stored float: %p\n", storedFloats.ElementAt(i));
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
const nsFrameList* oofs = GetOverflowOutOfFlows();
|
|
if (oofs && oofs->NotEmpty()) {
|
|
// Floats that were pushed should be removed from our float
|
|
// manager. Otherwise the float manager's YMost or XMost might
|
|
// be larger than necessary, causing this block to get an
|
|
// incorrect desired height (or width). Some of these floats
|
|
// may not actually have been added to the float manager because
|
|
// they weren't reflowed before being pushed; that's OK,
|
|
// RemoveRegions will ignore them. It is safe to do this here
|
|
// because we know from here on the float manager will only be
|
|
// used for its XMost and YMost, not to place new floats and
|
|
// lines.
|
|
aState.mFloatManager->RemoveTrailingRegions(oofs->FirstChild());
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::IsMarginRoot(bool* aBStartMarginRoot, bool* aBEndMarginRoot)
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_MARGIN_ROOT)) {
|
|
nsIFrame* parent = GetParent();
|
|
if (!parent || parent->IsFloatContainingBlock()) {
|
|
*aBStartMarginRoot = false;
|
|
*aBEndMarginRoot = false;
|
|
return;
|
|
}
|
|
if (parent->GetType() == nsGkAtoms::columnSetFrame) {
|
|
*aBStartMarginRoot = GetPrevInFlow() == nullptr;
|
|
*aBEndMarginRoot = GetNextInFlow() == nullptr;
|
|
return;
|
|
}
|
|
}
|
|
|
|
*aBStartMarginRoot = true;
|
|
*aBEndMarginRoot = true;
|
|
}
|
|
|
|
/* static */
|
|
bool
|
|
nsBlockFrame::BlockNeedsFloatManager(nsIFrame* aBlock)
|
|
{
|
|
NS_PRECONDITION(aBlock, "Must have a frame");
|
|
NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlock), "aBlock must be a block");
|
|
|
|
nsIFrame* parent = aBlock->GetParent();
|
|
return (aBlock->GetStateBits() & NS_BLOCK_FLOAT_MGR) ||
|
|
(parent && !parent->IsFloatContainingBlock());
|
|
}
|
|
|
|
/* static */
|
|
bool
|
|
nsBlockFrame::BlockCanIntersectFloats(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->IsFrameOfType(nsIFrame::eBlockFrame) &&
|
|
!aFrame->IsFrameOfType(nsIFrame::eReplaced) &&
|
|
!(aFrame->GetStateBits() & NS_BLOCK_FLOAT_MGR);
|
|
}
|
|
|
|
// Note that this width can vary based on the vertical position.
|
|
// However, the cases where it varies are the cases where the width fits
|
|
// in the available space given, which means that variation shouldn't
|
|
// matter.
|
|
/* static */
|
|
nsBlockFrame::ReplacedElementISizeToClear
|
|
nsBlockFrame::ISizeToClearPastFloats(const BlockReflowInput& aState,
|
|
const LogicalRect& aFloatAvailableSpace,
|
|
nsIFrame* aFrame)
|
|
{
|
|
nscoord inlineStartOffset, inlineEndOffset;
|
|
WritingMode wm = aState.mReflowInput.GetWritingMode();
|
|
SizeComputationInput offsetState(aFrame, aState.mReflowInput.mRenderingContext,
|
|
wm, aState.mContentArea.ISize(wm));
|
|
|
|
ReplacedElementISizeToClear result;
|
|
aState.ComputeReplacedBlockOffsetsForFloats(aFrame, aFloatAvailableSpace,
|
|
inlineStartOffset,
|
|
inlineEndOffset);
|
|
nscoord availISize = aState.mContentArea.ISize(wm) -
|
|
inlineStartOffset - inlineEndOffset;
|
|
|
|
// We actually don't want the min width here; see bug 427782; we only
|
|
// want to displace if the width won't compute to a value small enough
|
|
// to fit.
|
|
// All we really need here is the result of ComputeSize, and we
|
|
// could *almost* get that from an SizeComputationInput, except for the
|
|
// last argument.
|
|
WritingMode frWM = aFrame->GetWritingMode();
|
|
LogicalSize availSpace = LogicalSize(wm, availISize, NS_UNCONSTRAINEDSIZE).
|
|
ConvertTo(frWM, wm);
|
|
ReflowInput reflowInput(aState.mPresContext, aState.mReflowInput,
|
|
aFrame, availSpace);
|
|
result.borderBoxISize =
|
|
reflowInput.ComputedSizeWithBorderPadding().ConvertTo(wm, frWM).ISize(wm);
|
|
// Use the margins from offsetState rather than reflowInput so that
|
|
// they aren't reduced by ignoring margins in overconstrained cases.
|
|
LogicalMargin computedMargin =
|
|
offsetState.ComputedLogicalMargin().ConvertTo(wm, frWM);
|
|
result.marginIStart = computedMargin.IStart(wm);
|
|
return result;
|
|
}
|
|
|
|
/* static */
|
|
nsBlockFrame*
|
|
nsBlockFrame::GetNearestAncestorBlock(nsIFrame* aCandidate)
|
|
{
|
|
nsBlockFrame* block = nullptr;
|
|
while(aCandidate) {
|
|
block = nsLayoutUtils::GetAsBlock(aCandidate);
|
|
if (block) {
|
|
// yay, candidate is a block!
|
|
return block;
|
|
}
|
|
// Not a block. Check its parent next.
|
|
aCandidate = aCandidate->GetParent();
|
|
}
|
|
NS_NOTREACHED("Fell off frame tree looking for ancestor block!");
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeFinalBSize(const ReflowInput& aReflowInput,
|
|
nsReflowStatus* aStatus,
|
|
nscoord aContentBSize,
|
|
const LogicalMargin& aBorderPadding,
|
|
LogicalSize& aFinalSize,
|
|
nscoord aConsumed)
|
|
{
|
|
WritingMode wm = aReflowInput.GetWritingMode();
|
|
// Figure out how much of the computed height should be
|
|
// applied to this frame.
|
|
nscoord computedBSizeLeftOver = GetEffectiveComputedBSize(aReflowInput,
|
|
aConsumed);
|
|
NS_ASSERTION(!( IS_TRUE_OVERFLOW_CONTAINER(this)
|
|
&& computedBSizeLeftOver ),
|
|
"overflow container must not have computedBSizeLeftOver");
|
|
|
|
aFinalSize.BSize(wm) =
|
|
NSCoordSaturatingAdd(NSCoordSaturatingAdd(aBorderPadding.BStart(wm),
|
|
computedBSizeLeftOver),
|
|
aBorderPadding.BEnd(wm));
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(*aStatus) &&
|
|
aFinalSize.BSize(wm) < aReflowInput.AvailableBSize()) {
|
|
// We fit in the available space - change status to OVERFLOW_INCOMPLETE.
|
|
// XXXmats why didn't Reflow report OVERFLOW_INCOMPLETE in the first place?
|
|
// XXXmats and why exclude the case when our size == AvailableBSize?
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(*aStatus);
|
|
}
|
|
|
|
if (NS_FRAME_IS_COMPLETE(*aStatus)) {
|
|
if (computedBSizeLeftOver > 0 &&
|
|
NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableBSize() &&
|
|
aFinalSize.BSize(wm) > aReflowInput.AvailableBSize()) {
|
|
if (ShouldAvoidBreakInside(aReflowInput)) {
|
|
*aStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
return;
|
|
}
|
|
// We don't fit and we consumed some of the computed height,
|
|
// so we should consume all the available height and then
|
|
// break. If our bottom border/padding straddles the break
|
|
// point, then this will increase our height and push the
|
|
// border/padding to the next page/column.
|
|
aFinalSize.BSize(wm) = std::max(aReflowInput.AvailableBSize(),
|
|
aContentBSize);
|
|
NS_FRAME_SET_INCOMPLETE(*aStatus);
|
|
if (!GetNextInFlow())
|
|
*aStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ResolveBidi()
|
|
{
|
|
NS_ASSERTION(!GetPrevInFlow(),
|
|
"ResolveBidi called on non-first continuation");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
if (!presContext->BidiEnabled()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
return nsBidiPresUtils::Resolve(this);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsBlockFrame::VerifyLines(bool aFinalCheckOK)
|
|
{
|
|
if (!gVerifyLines) {
|
|
return;
|
|
}
|
|
if (mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
nsLineBox* cursor = GetLineCursor();
|
|
|
|
// Add up the counts on each line. Also validate that IsFirstLine is
|
|
// set properly.
|
|
int32_t count = 0;
|
|
LineIterator line, line_end;
|
|
for (line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
++line) {
|
|
if (line == cursor) {
|
|
cursor = nullptr;
|
|
}
|
|
if (aFinalCheckOK) {
|
|
MOZ_ASSERT(line->GetChildCount(), "empty line");
|
|
if (line->IsBlock()) {
|
|
NS_ASSERTION(1 == line->GetChildCount(), "bad first line");
|
|
}
|
|
}
|
|
count += line->GetChildCount();
|
|
}
|
|
|
|
// Then count the frames
|
|
int32_t frameCount = 0;
|
|
nsIFrame* frame = mLines.front()->mFirstChild;
|
|
while (frame) {
|
|
frameCount++;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
NS_ASSERTION(count == frameCount, "bad line list");
|
|
|
|
// Next: test that each line has right number of frames on it
|
|
for (line = LinesBegin(), line_end = LinesEnd();
|
|
line != line_end;
|
|
) {
|
|
count = line->GetChildCount();
|
|
frame = line->mFirstChild;
|
|
while (--count >= 0) {
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
++line;
|
|
if ((line != line_end) && (0 != line->GetChildCount())) {
|
|
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
|
|
}
|
|
}
|
|
|
|
if (cursor) {
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
LineIterator line = overflowLines->mLines.begin();
|
|
LineIterator line_end = overflowLines->mLines.end();
|
|
for (; line != line_end; ++line) {
|
|
if (line == cursor) {
|
|
cursor = nullptr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
NS_ASSERTION(!cursor, "stale LineCursorProperty");
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::VerifyOverflowSituation()
|
|
{
|
|
// Overflow out-of-flows must not have a next-in-flow in mFloats or mFrames.
|
|
nsFrameList* oofs = GetOverflowOutOfFlows() ;
|
|
if (oofs) {
|
|
for (nsFrameList::Enumerator e(*oofs); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* nif = e.get()->GetNextInFlow();
|
|
MOZ_ASSERT(!nif || (!mFloats.ContainsFrame(nif) && !mFrames.ContainsFrame(nif)));
|
|
}
|
|
}
|
|
|
|
// Pushed floats must not have a next-in-flow in mFloats or mFrames.
|
|
oofs = GetPushedFloats();
|
|
if (oofs) {
|
|
for (nsFrameList::Enumerator e(*oofs); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* nif = e.get()->GetNextInFlow();
|
|
MOZ_ASSERT(!nif || (!mFloats.ContainsFrame(nif) && !mFrames.ContainsFrame(nif)));
|
|
}
|
|
}
|
|
|
|
// A child float next-in-flow's parent must be |this| or a next-in-flow of |this|.
|
|
// Later next-in-flows must have the same or later parents.
|
|
nsIFrame::ChildListID childLists[] = { nsIFrame::kFloatList,
|
|
nsIFrame::kPushedFloatsList };
|
|
for (size_t i = 0; i < ArrayLength(childLists); ++i) {
|
|
nsFrameList children(GetChildList(childLists[i]));
|
|
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* parent = this;
|
|
nsIFrame* nif = e.get()->GetNextInFlow();
|
|
for (; nif; nif = nif->GetNextInFlow()) {
|
|
bool found = false;
|
|
for (nsIFrame* p = parent; p; p = p->GetNextInFlow()) {
|
|
if (nif->GetParent() == p) {
|
|
parent = p;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
MOZ_ASSERT(found, "next-in-flow is a child of parent earlier in the frame tree?");
|
|
}
|
|
}
|
|
}
|
|
|
|
nsBlockFrame* flow = static_cast<nsBlockFrame*>(FirstInFlow());
|
|
while (flow) {
|
|
FrameLines* overflowLines = flow->GetOverflowLines();
|
|
if (overflowLines) {
|
|
NS_ASSERTION(!overflowLines->mLines.empty(),
|
|
"should not be empty if present");
|
|
NS_ASSERTION(overflowLines->mLines.front()->mFirstChild,
|
|
"bad overflow lines");
|
|
NS_ASSERTION(overflowLines->mLines.front()->mFirstChild ==
|
|
overflowLines->mFrames.FirstChild(),
|
|
"bad overflow frames / lines");
|
|
}
|
|
nsLineBox* cursor = flow->GetLineCursor();
|
|
if (cursor) {
|
|
LineIterator line = flow->LinesBegin();
|
|
LineIterator line_end = flow->LinesEnd();
|
|
for (; line != line_end && line != cursor; ++line)
|
|
;
|
|
if (line == line_end && overflowLines) {
|
|
line = overflowLines->mLines.begin();
|
|
line_end = overflowLines->mLines.end();
|
|
for (; line != line_end && line != cursor; ++line)
|
|
;
|
|
}
|
|
MOZ_ASSERT(line != line_end, "stale LineCursorProperty");
|
|
}
|
|
flow = static_cast<nsBlockFrame*>(flow->GetNextInFlow());
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
nsBlockFrame::GetDepth() const
|
|
{
|
|
int32_t depth = 0;
|
|
nsIFrame* parent = GetParent();
|
|
while (parent) {
|
|
parent = parent->GetParent();
|
|
depth++;
|
|
}
|
|
return depth;
|
|
}
|
|
|
|
already_AddRefed<nsStyleContext>
|
|
nsBlockFrame::GetFirstLetterStyle(nsPresContext* aPresContext)
|
|
{
|
|
return aPresContext->StyleSet()->
|
|
ProbePseudoElementStyle(mContent->AsElement(),
|
|
CSSPseudoElementType::firstLetter,
|
|
mStyleContext);
|
|
}
|
|
#endif
|