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Mypal/layout/generic/nsSubDocumentFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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 replaced elements that contain a document, such
* as <frame>, <iframe>, and some <object>s
*/
#include "nsSubDocumentFrame.h"
#include "gfxPrefs.h"
#include "mozilla/layout/RenderFrameParent.h"
#include "nsCOMPtr.h"
#include "nsGenericHTMLElement.h"
#include "nsGenericHTMLFrameElement.h"
#include "nsAttrValueInlines.h"
#include "nsIDocShell.h"
#include "nsIContentViewer.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsIDocument.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsGkAtoms.h"
#include "nsStyleConsts.h"
#include "nsFrameSetFrame.h"
#include "nsIDOMHTMLFrameElement.h"
#include "nsIScrollable.h"
#include "nsNameSpaceManager.h"
#include "nsDisplayList.h"
#include "nsIScrollableFrame.h"
#include "nsIObjectLoadingContent.h"
#include "nsLayoutUtils.h"
#include "FrameLayerBuilder.h"
#include "nsPluginFrame.h"
#include "nsContentUtils.h"
#include "nsIPermissionManager.h"
#include "nsServiceManagerUtils.h"
#include "nsIDOMMutationEvent.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using mozilla::layout::RenderFrameParent;
static bool sShowPreviousPage = true;
static nsIDocument*
GetDocumentFromView(nsView* aView)
{
NS_PRECONDITION(aView, "");
nsViewManager* vm = aView->GetViewManager();
nsIPresShell* ps = vm ? vm->GetPresShell() : nullptr;
return ps ? ps->GetDocument() : nullptr;
}
nsSubDocumentFrame::nsSubDocumentFrame(nsStyleContext* aContext)
: nsAtomicContainerFrame(aContext)
, mIsInline(false)
, mPostedReflowCallback(false)
, mDidCreateDoc(false)
, mCallingShow(false)
{
}
#ifdef ACCESSIBILITY
a11y::AccType
nsSubDocumentFrame::AccessibleType()
{
return a11y::eOuterDocType;
}
#endif
NS_QUERYFRAME_HEAD(nsSubDocumentFrame)
NS_QUERYFRAME_ENTRY(nsSubDocumentFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsAtomicContainerFrame)
class AsyncFrameInit : public Runnable
{
public:
explicit AsyncFrameInit(nsIFrame* aFrame) : mFrame(aFrame) {}
NS_IMETHOD Run() override
{
PROFILER_LABEL("mozilla", "AsyncFrameInit::Run", js::ProfileEntry::Category::OTHER);
if (mFrame.IsAlive()) {
static_cast<nsSubDocumentFrame*>(mFrame.GetFrame())->ShowViewer();
}
return NS_OK;
}
private:
nsWeakFrame mFrame;
};
static void
InsertViewsInReverseOrder(nsView* aSibling, nsView* aParent);
static void
EndSwapDocShellsForViews(nsView* aView);
void
nsSubDocumentFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
// determine if we are a <frame> or <iframe>
nsCOMPtr<nsIDOMHTMLFrameElement> frameElem = do_QueryInterface(aContent);
mIsInline = frameElem ? false : true;
static bool addedShowPreviousPage = false;
if (!addedShowPreviousPage) {
Preferences::AddBoolVarCache(&sShowPreviousPage, "layout.show_previous_page", true);
addedShowPreviousPage = true;
}
nsAtomicContainerFrame::Init(aContent, aParent, aPrevInFlow);
// We are going to create an inner view. If we need a view for the
// OuterFrame but we wait for the normal view creation path in
// nsCSSFrameConstructor, then we will lose because the inner view's
// parent will already have been set to some outer view (e.g., the
// canvas) when it really needs to have this frame's view as its
// parent. So, create this frame's view right away, whether we
// really need it or not, and the inner view will get it as the
// parent.
if (!HasView()) {
nsContainerFrame::CreateViewForFrame(this, true);
}
EnsureInnerView();
// Set the primary frame now so that nsDocumentViewer::FindContainerView
// called from within EndSwapDocShellsForViews below can find it if needed.
aContent->SetPrimaryFrame(this);
// If we have a detached subdoc's root view on our frame loader, re-insert
// it into the view tree. This happens when we've been reframed, and
// ensures the presentation persists across reframes. If the frame element
// has changed documents however, we blow away the presentation.
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsCOMPtr<nsIDocument> oldContainerDoc;
nsIFrame* detachedFrame =
frameloader->GetDetachedSubdocFrame(getter_AddRefs(oldContainerDoc));
frameloader->SetDetachedSubdocFrame(nullptr, nullptr);
MOZ_ASSERT(oldContainerDoc || !detachedFrame);
if (oldContainerDoc) {
nsView* detachedView =
detachedFrame ? detachedFrame->GetView() : nullptr;
if (detachedView && oldContainerDoc == aContent->OwnerDoc()) {
// Restore stashed presentation.
::InsertViewsInReverseOrder(detachedView, mInnerView);
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
} else {
// Presentation is for a different document, don't restore it.
frameloader->Hide();
}
}
}
nsContentUtils::AddScriptRunner(new AsyncFrameInit(this));
}
void
nsSubDocumentFrame::ShowViewer()
{
if (mCallingShow) {
return;
}
if (!PresContext()->IsDynamic()) {
// We let the printing code take care of loading the document; just
// create the inner view for it to use.
(void) EnsureInnerView();
} else {
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
CSSIntSize margin = GetMarginAttributes();
nsWeakFrame weakThis(this);
mCallingShow = true;
const nsAttrValue* attrValue =
GetContent()->AsElement()->GetParsedAttr(nsGkAtoms::scrolling);
int32_t scrolling =
nsGenericHTMLFrameElement::MapScrollingAttribute(attrValue);
bool didCreateDoc =
frameloader->Show(margin.width, margin.height,
scrolling, scrolling, this);
if (!weakThis.IsAlive()) {
return;
}
mCallingShow = false;
mDidCreateDoc = didCreateDoc;
}
}
}
nsIFrame*
nsSubDocumentFrame::GetSubdocumentRootFrame()
{
if (!mInnerView)
return nullptr;
nsView* subdocView = mInnerView->GetFirstChild();
return subdocView ? subdocView->GetFrame() : nullptr;
}
nsIPresShell*
nsSubDocumentFrame::GetSubdocumentPresShellForPainting(uint32_t aFlags)
{
if (!mInnerView)
return nullptr;
nsView* subdocView = mInnerView->GetFirstChild();
if (!subdocView)
return nullptr;
nsIPresShell* presShell = nullptr;
nsIFrame* subdocRootFrame = subdocView->GetFrame();
if (subdocRootFrame) {
presShell = subdocRootFrame->PresContext()->PresShell();
}
// If painting is suppressed in the presshell, we try to look for a better
// presshell to use.
if (!presShell || (presShell->IsPaintingSuppressed() &&
!(aFlags & IGNORE_PAINT_SUPPRESSION))) {
// During page transition mInnerView will sometimes have two children, the
// first being the new page that may not have any frame, and the second
// being the old page that will probably have a frame.
nsView* nextView = subdocView->GetNextSibling();
nsIFrame* frame = nullptr;
if (nextView) {
frame = nextView->GetFrame();
}
if (frame) {
nsIPresShell* ps = frame->PresContext()->PresShell();
if (!presShell || (ps && !ps->IsPaintingSuppressed() && sShowPreviousPage)) {
subdocView = nextView;
subdocRootFrame = frame;
presShell = ps;
}
}
if (!presShell) {
// If we don't have a frame we use this roundabout way to get the pres shell.
if (!mFrameLoader)
return nullptr;
nsCOMPtr<nsIDocShell> docShell;
mFrameLoader->GetDocShell(getter_AddRefs(docShell));
if (!docShell)
return nullptr;
presShell = docShell->GetPresShell();
}
}
return presShell;
}
ScreenIntSize
nsSubDocumentFrame::GetSubdocumentSize()
{
if (GetStateBits() & NS_FRAME_FIRST_REFLOW) {
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsCOMPtr<nsIDocument> oldContainerDoc;
nsIFrame* detachedFrame =
frameloader->GetDetachedSubdocFrame(getter_AddRefs(oldContainerDoc));
nsView* view = detachedFrame ? detachedFrame->GetView() : nullptr;
if (view) {
nsSize size = view->GetBounds().Size();
nsPresContext* presContext = detachedFrame->PresContext();
return ScreenIntSize(presContext->AppUnitsToDevPixels(size.width),
presContext->AppUnitsToDevPixels(size.height));
}
}
// Pick some default size for now. Using 10x10 because that's what the
// code used to do.
return ScreenIntSize(10, 10);
} else {
nsSize docSizeAppUnits;
nsPresContext* presContext = PresContext();
nsCOMPtr<nsIDOMHTMLFrameElement> frameElem =
do_QueryInterface(GetContent());
if (frameElem) {
docSizeAppUnits = GetSize();
} else {
docSizeAppUnits = GetContentRect().Size();
}
// Adjust subdocument size, according to 'object-fit' and the
// subdocument's intrinsic size and ratio.
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
nsRect destRect =
nsLayoutUtils::ComputeObjectDestRect(nsRect(nsPoint(), docSizeAppUnits),
subDocRoot->GetIntrinsicSize(),
subDocRoot->GetIntrinsicRatio(),
StylePosition());
docSizeAppUnits = destRect.Size();
}
return ScreenIntSize(presContext->AppUnitsToDevPixels(docSizeAppUnits.width),
presContext->AppUnitsToDevPixels(docSizeAppUnits.height));
}
}
static void
WrapBackgroundColorInOwnLayer(nsDisplayListBuilder* aBuilder,
nsIFrame* aFrame,
nsDisplayList* aList)
{
nsDisplayList tempItems;
nsDisplayItem* item;
while ((item = aList->RemoveBottom()) != nullptr) {
if (item->GetType() == nsDisplayItem::TYPE_BACKGROUND_COLOR) {
nsDisplayList tmpList;
tmpList.AppendToTop(item);
item = new (aBuilder) nsDisplayOwnLayer(aBuilder, aFrame, &tmpList);
}
tempItems.AppendToTop(item);
}
aList->AppendToTop(&tempItems);
}
void
nsSubDocumentFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return;
nsFrameLoader* frameLoader = FrameLoader();
RenderFrameParent* rfp = nullptr;
if (frameLoader) {
rfp = frameLoader->GetCurrentRenderFrame();
}
// If we are pointer-events:none then we don't need to HitTest background
bool pointerEventsNone =
StyleUserInterface()->mPointerEvents == NS_STYLE_POINTER_EVENTS_NONE;
if (!aBuilder->IsForEventDelivery() || !pointerEventsNone) {
nsDisplayListCollection decorations(aBuilder);
DisplayBorderBackgroundOutline(aBuilder, decorations);
if (rfp) {
// Wrap background colors of <iframe>s with remote subdocuments in their
// own layer so we generate a ColorLayer. This is helpful for optimizing
// compositing; we can skip compositing the ColorLayer when the
// remote content is opaque.
WrapBackgroundColorInOwnLayer(aBuilder, this, decorations.BorderBackground());
}
decorations.MoveTo(aLists);
}
if (aBuilder->IsForEventDelivery() && pointerEventsNone) {
return;
}
// If we're passing pointer events to children then we have to descend into
// subdocuments no matter what, to determine which parts are transparent for
// hit-testing or event regions.
bool needToDescend = aBuilder->GetDescendIntoSubdocuments();
if (!mInnerView || !needToDescend) {
return;
}
if (rfp) {
rfp->BuildDisplayList(aBuilder, this, aLists);
return;
}
nsCOMPtr<nsIPresShell> presShell =
GetSubdocumentPresShellForPainting(
aBuilder->IsIgnoringPaintSuppression() ? IGNORE_PAINT_SUPPRESSION : 0);
if (!presShell) {
return;
}
nsIFrame* subdocRootFrame = presShell->GetRootFrame();
nsPresContext* presContext = presShell->GetPresContext();
int32_t parentAPD = PresContext()->AppUnitsPerDevPixel();
int32_t subdocAPD = presContext->AppUnitsPerDevPixel();
nsRect dirty;
bool haveDisplayPort = false;
bool ignoreViewportScrolling = false;
nsIFrame* savedIgnoreScrollFrame = nullptr;
if (subdocRootFrame) {
// get the dirty rect relative to the root frame of the subdoc
dirty = aBuilder->GetDirtyRect() + GetOffsetToCrossDoc(subdocRootFrame);
// and convert into the appunits of the subdoc
dirty = dirty.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) {
nsIScrollableFrame* rootScrollableFrame = presShell->GetRootScrollFrameAsScrollable();
MOZ_ASSERT(rootScrollableFrame);
// Use a copy, so the rects don't get modified.
nsRect copyOfDirty = dirty;
haveDisplayPort = rootScrollableFrame->DecideScrollableLayer(aBuilder,
&copyOfDirty,
/* aAllowCreateDisplayPort = */ true);
if (!gfxPrefs::LayoutUseContainersForRootFrames()) {
haveDisplayPort = false;
}
ignoreViewportScrolling = presShell->IgnoringViewportScrolling();
if (ignoreViewportScrolling) {
savedIgnoreScrollFrame = aBuilder->GetIgnoreScrollFrame();
aBuilder->SetIgnoreScrollFrame(rootScrollFrame);
}
}
aBuilder->EnterPresShell(subdocRootFrame, pointerEventsNone);
} else {
dirty = aBuilder->GetDirtyRect();
}
DisplayListClipState::AutoSaveRestore clipState(aBuilder);
if (ShouldClipSubdocument()) {
clipState.ClipContainingBlockDescendantsToContentBox(aBuilder, this);
}
nsIScrollableFrame *sf = presShell->GetRootScrollFrameAsScrollable();
bool constructResolutionItem = subdocRootFrame &&
(presShell->GetResolution() != 1.0);
bool constructZoomItem = subdocRootFrame && parentAPD != subdocAPD;
bool needsOwnLayer = false;
if (constructResolutionItem ||
constructZoomItem ||
haveDisplayPort ||
presContext->IsRootContentDocument() ||
(sf && sf->IsScrollingActive(aBuilder)))
{
needsOwnLayer = true;
}
if (!needsOwnLayer && aBuilder->IsBuildingLayerEventRegions() &&
nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(presShell))
{
needsOwnLayer = true;
}
nsDisplayList childItems;
{
DisplayListClipState::AutoSaveRestore nestedClipState(aBuilder);
if (needsOwnLayer) {
// Clear current clip. There's no point in propagating it down, since
// the layer we will construct will be clipped by the current clip.
// In fact for nsDisplayZoom propagating it down would be incorrect since
// nsDisplayZoom changes the meaning of appunits.
nestedClipState.EnterStackingContextContents(true);
}
// Invoke AutoBuildingDisplayList to ensure that the correct dirty rect
// is used to compute the visible rect if AddCanvasBackgroundColorItem
// creates a display item.
nsIFrame* frame = subdocRootFrame ? subdocRootFrame : this;
nsDisplayListBuilder::AutoBuildingDisplayList
building(aBuilder, frame, dirty, true);
if (subdocRootFrame) {
nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
nsDisplayListBuilder::AutoCurrentScrollParentIdSetter idSetter(
aBuilder,
ignoreViewportScrolling && rootScrollFrame && rootScrollFrame->GetContent()
? nsLayoutUtils::FindOrCreateIDFor(rootScrollFrame->GetContent())
: aBuilder->GetCurrentScrollParentId());
aBuilder->SetAncestorHasApzAwareEventHandler(false);
subdocRootFrame->
BuildDisplayListForStackingContext(aBuilder, &childItems);
}
if (!aBuilder->IsForEventDelivery()) {
// If we are going to use a displayzoom below then any items we put under
// it need to have underlying frames from the subdocument. So we need to
// calculate the bounds based on which frame will be the underlying frame
// for the canvas background color item.
nsRect bounds = GetContentRectRelativeToSelf() +
aBuilder->ToReferenceFrame(this);
if (subdocRootFrame) {
bounds = bounds.ScaleToOtherAppUnitsRoundOut(parentAPD, subdocAPD);
}
// If we are in print preview/page layout we want to paint the grey
// background behind the page, not the canvas color. The canvas color gets
// painted on the page itself.
if (nsLayoutUtils::NeedsPrintPreviewBackground(presContext)) {
presShell->AddPrintPreviewBackgroundItem(
*aBuilder, childItems, frame, bounds);
} else {
// Add the canvas background color to the bottom of the list. This
// happens after we've built the list so that AddCanvasBackgroundColorItem
// can monkey with the contents if necessary.
uint32_t flags = nsIPresShell::FORCE_DRAW;
presShell->AddCanvasBackgroundColorItem(
*aBuilder, childItems, frame, bounds, NS_RGBA(0,0,0,0), flags);
}
}
}
if (subdocRootFrame) {
aBuilder->LeavePresShell(subdocRootFrame, &childItems);
if (ignoreViewportScrolling) {
aBuilder->SetIgnoreScrollFrame(savedIgnoreScrollFrame);
}
}
// Generate a resolution and/or zoom item if needed. If one or both of those is
// created, we don't need to create a separate nsDisplaySubDocument.
uint32_t flags = nsDisplayOwnLayer::GENERATE_SUBDOC_INVALIDATIONS;
// If ignoreViewportScrolling is true then the top most layer we create here
// is going to become the scrollable layer for the root scroll frame, so we
// want to add nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER to whatever layer
// becomes the topmost. We do this below.
if (constructZoomItem) {
uint32_t zoomFlags = flags;
if (ignoreViewportScrolling && !constructResolutionItem) {
zoomFlags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
nsDisplayZoom* zoomItem =
new (aBuilder) nsDisplayZoom(aBuilder, subdocRootFrame, &childItems,
subdocAPD, parentAPD, zoomFlags);
childItems.AppendToTop(zoomItem);
needsOwnLayer = false;
}
// Wrap the zoom item in the resolution item if we have both because we want the
// resolution scale applied on top of the app units per dev pixel conversion.
if (ignoreViewportScrolling) {
flags |= nsDisplayOwnLayer::GENERATE_SCROLLABLE_LAYER;
}
if (constructResolutionItem) {
nsDisplayResolution* resolutionItem =
new (aBuilder) nsDisplayResolution(aBuilder, subdocRootFrame, &childItems,
flags);
childItems.AppendToTop(resolutionItem);
needsOwnLayer = false;
}
if (needsOwnLayer) {
// We always want top level content documents to be in their own layer.
nsDisplaySubDocument* layerItem = new (aBuilder) nsDisplaySubDocument(
aBuilder, subdocRootFrame ? subdocRootFrame : this,
&childItems, flags);
childItems.AppendToTop(layerItem);
}
if (aBuilder->IsForFrameVisibility()) {
// We don't add the childItems to the return list as we're dealing with them here.
presShell->RebuildApproximateFrameVisibilityDisplayList(childItems);
childItems.DeleteAll();
} else {
aLists.Content()->AppendToTop(&childItems);
}
}
nscoord
nsSubDocumentFrame::GetIntrinsicISize()
{
if (!IsInline()) {
return 0; // HTML <frame> has no useful intrinsic isize
}
if (mContent->IsXULElement()) {
return 0; // XUL <iframe> and <browser> have no useful intrinsic isize
}
NS_ASSERTION(ObtainIntrinsicSizeFrame() == nullptr,
"Intrinsic isize should come from the embedded document.");
// We must be an HTML <iframe>. Default to size of 300px x 150px, for IE
// compat (and per CSS2.1 draft).
WritingMode wm = GetWritingMode();
return nsPresContext::CSSPixelsToAppUnits(wm.IsVertical() ? 150 : 300);
}
nscoord
nsSubDocumentFrame::GetIntrinsicBSize()
{
// <frame> processing does not use this routine, only <iframe>
NS_ASSERTION(IsInline(), "Shouldn't have been called");
if (mContent->IsXULElement()) {
return 0;
}
NS_ASSERTION(ObtainIntrinsicSizeFrame() == nullptr,
"Intrinsic bsize should come from the embedded document.");
// Use size of 300px x 150px, for compatibility with IE, and per CSS2.1 draft.
WritingMode wm = GetWritingMode();
return nsPresContext::CSSPixelsToAppUnits(wm.IsVertical() ? 300 : 150);
}
#ifdef DEBUG_FRAME_DUMP
void
nsSubDocumentFrame::List(FILE* out, const char* aPrefix, uint32_t aFlags) const
{
nsCString str;
ListGeneric(str, aPrefix, aFlags);
fprintf_stderr(out, "%s\n", str.get());
if (aFlags & TRAVERSE_SUBDOCUMENT_FRAMES) {
nsSubDocumentFrame* f = const_cast<nsSubDocumentFrame*>(this);
nsIFrame* subdocRootFrame = f->GetSubdocumentRootFrame();
if (subdocRootFrame) {
nsCString pfx(aPrefix);
pfx += " ";
subdocRootFrame->List(out, pfx.get(), aFlags);
}
}
}
nsresult nsSubDocumentFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("FrameOuter"), aResult);
}
#endif
nsIAtom*
nsSubDocumentFrame::GetType() const
{
return nsGkAtoms::subDocumentFrame;
}
/* virtual */ nscoord
nsSubDocumentFrame::GetMinISize(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_MIN_WIDTH(this, result);
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
result = subDocRoot->GetMinISize(aRenderingContext);
} else {
result = GetIntrinsicISize();
}
return result;
}
/* virtual */ nscoord
nsSubDocumentFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
{
nscoord result;
DISPLAY_PREF_WIDTH(this, result);
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
result = subDocRoot->GetPrefISize(aRenderingContext);
} else {
result = GetIntrinsicISize();
}
return result;
}
/* virtual */ IntrinsicSize
nsSubDocumentFrame::GetIntrinsicSize()
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return subDocRoot->GetIntrinsicSize();
}
return nsAtomicContainerFrame::GetIntrinsicSize();
}
/* virtual */ AspectRatio
nsSubDocumentFrame::GetIntrinsicRatio()
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return subDocRoot->GetIntrinsicRatio();
}
return nsAtomicContainerFrame::GetIntrinsicRatio();
}
/* virtual */
LogicalSize
nsSubDocumentFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
WritingMode aWM,
const LogicalSize& aCBSize,
nscoord aAvailableISize,
const LogicalSize& aMargin,
const LogicalSize& aBorder,
const LogicalSize& aPadding,
ComputeSizeFlags aFlags)
{
if (!IsInline()) {
return nsFrame::ComputeAutoSize(aRenderingContext, aWM, aCBSize,
aAvailableISize, aMargin, aBorder,
aPadding, aFlags);
}
const WritingMode wm = GetWritingMode();
LogicalSize result(wm, GetIntrinsicISize(), GetIntrinsicBSize());
return result.ConvertTo(aWM, wm);
}
/* virtual */
LogicalSize
nsSubDocumentFrame::ComputeSize(nsRenderingContext* aRenderingContext,
WritingMode aWM,
const LogicalSize& aCBSize,
nscoord aAvailableISize,
const LogicalSize& aMargin,
const LogicalSize& aBorder,
const LogicalSize& aPadding,
ComputeSizeFlags aFlags)
{
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
if (subDocRoot) {
return ComputeSizeWithIntrinsicDimensions(aRenderingContext, aWM,
subDocRoot->GetIntrinsicSize(),
subDocRoot->GetIntrinsicRatio(),
aCBSize, aMargin, aBorder,
aPadding, aFlags);
}
return nsAtomicContainerFrame::ComputeSize(aRenderingContext, aWM,
aCBSize, aAvailableISize,
aMargin, aBorder, aPadding,
aFlags);
}
void
nsSubDocumentFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus)
{
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsSubDocumentFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("enter nsSubDocumentFrame::Reflow: maxSize=%d,%d",
aReflowInput.AvailableWidth(), aReflowInput.AvailableHeight()));
NS_ASSERTION(aReflowInput.ComputedWidth() != NS_UNCONSTRAINEDSIZE,
"Shouldn't have unconstrained stuff here "
"thanks to the rules of reflow");
NS_ASSERTION(NS_INTRINSICSIZE != aReflowInput.ComputedHeight(),
"Shouldn't have unconstrained stuff here "
"thanks to ComputeAutoSize");
aStatus = NS_FRAME_COMPLETE;
NS_ASSERTION(mContent->GetPrimaryFrame() == this,
"Shouldn't happen");
// XUL <iframe> or <browser>, or HTML <iframe>, <object> or <embed>
aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
aReflowInput.ComputedSizeWithBorderPadding());
// "offset" is the offset of our content area from our frame's
// top-left corner.
nsPoint offset = nsPoint(aReflowInput.ComputedPhysicalBorderPadding().left,
aReflowInput.ComputedPhysicalBorderPadding().top);
if (mInnerView) {
const nsMargin& bp = aReflowInput.ComputedPhysicalBorderPadding();
nsSize innerSize(aDesiredSize.Width() - bp.LeftRight(),
aDesiredSize.Height() - bp.TopBottom());
// Size & position the view according to 'object-fit' & 'object-position'.
nsIFrame* subDocRoot = ObtainIntrinsicSizeFrame();
IntrinsicSize intrinsSize;
AspectRatio intrinsRatio;
if (subDocRoot) {
intrinsSize = subDocRoot->GetIntrinsicSize();
intrinsRatio = subDocRoot->GetIntrinsicRatio();
}
nsRect destRect =
nsLayoutUtils::ComputeObjectDestRect(nsRect(offset, innerSize),
intrinsSize, intrinsRatio,
StylePosition());
nsViewManager* vm = mInnerView->GetViewManager();
vm->MoveViewTo(mInnerView, destRect.x, destRect.y);
vm->ResizeView(mInnerView, nsRect(nsPoint(0, 0), destRect.Size()), true);
}
aDesiredSize.SetOverflowAreasToDesiredBounds();
if (!ShouldClipSubdocument()) {
nsIFrame* subdocRootFrame = GetSubdocumentRootFrame();
if (subdocRootFrame) {
aDesiredSize.mOverflowAreas.UnionWith(subdocRootFrame->GetOverflowAreas() + offset);
}
}
FinishAndStoreOverflow(&aDesiredSize);
if (!aPresContext->IsPaginated() && !mPostedReflowCallback) {
PresContext()->PresShell()->PostReflowCallback(this);
mPostedReflowCallback = true;
}
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS,
("exit nsSubDocumentFrame::Reflow: size=%d,%d status=%x",
aDesiredSize.Width(), aDesiredSize.Height(), aStatus));
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
bool
nsSubDocumentFrame::ReflowFinished()
{
if (mFrameLoader) {
nsWeakFrame weakFrame(this);
mFrameLoader->UpdatePositionAndSize(this);
if (weakFrame.IsAlive()) {
// Make sure that we can post a reflow callback in the future.
mPostedReflowCallback = false;
}
} else {
mPostedReflowCallback = false;
}
return false;
}
void
nsSubDocumentFrame::ReflowCallbackCanceled()
{
mPostedReflowCallback = false;
}
nsresult
nsSubDocumentFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID != kNameSpaceID_None) {
return NS_OK;
}
// If the noResize attribute changes, dis/allow frame to be resized
if (aAttribute == nsGkAtoms::noresize) {
// Note that we're not doing content type checks, but that's ok -- if
// they'd fail we will just end up with a null framesetFrame.
if (mContent->GetParent()->IsHTMLElement(nsGkAtoms::frameset)) {
nsIFrame* parentFrame = GetParent();
if (parentFrame) {
// There is no interface for nsHTMLFramesetFrame so QI'ing to
// concrete class, yay!
nsHTMLFramesetFrame* framesetFrame = do_QueryFrame(parentFrame);
if (framesetFrame) {
framesetFrame->RecalculateBorderResize();
}
}
}
}
else if (aAttribute == nsGkAtoms::showresizer) {
nsIFrame* rootFrame = GetSubdocumentRootFrame();
if (rootFrame) {
rootFrame->PresContext()->PresShell()->
FrameNeedsReflow(rootFrame, nsIPresShell::eResize, NS_FRAME_IS_DIRTY);
}
}
else if (aAttribute == nsGkAtoms::marginwidth ||
aAttribute == nsGkAtoms::marginheight) {
// Retrieve the attributes
CSSIntSize margins = GetMarginAttributes();
// Notify the frameloader
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader)
frameloader->MarginsChanged(margins.width, margins.height);
}
return NS_OK;
}
nsIFrame*
NS_NewSubDocumentFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsSubDocumentFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsSubDocumentFrame)
class nsHideViewer : public Runnable {
public:
nsHideViewer(nsIContent* aFrameElement,
nsFrameLoader* aFrameLoader,
nsIPresShell* aPresShell,
bool aHideViewerIfFrameless)
: mFrameElement(aFrameElement),
mFrameLoader(aFrameLoader),
mPresShell(aPresShell),
mHideViewerIfFrameless(aHideViewerIfFrameless)
{
NS_ASSERTION(mFrameElement, "Must have a frame element");
NS_ASSERTION(mFrameLoader, "Must have a frame loader");
NS_ASSERTION(mPresShell, "Must have a presshell");
}
NS_IMETHOD Run() override
{
// Flush frames, to ensure any pending display:none changes are made.
// Note it can be unsafe to flush if we've destroyed the presentation
// for some other reason, like if we're shutting down.
if (!mPresShell->IsDestroying()) {
mPresShell->FlushPendingNotifications(Flush_Frames);
}
// Either the frame has been constructed by now, or it never will be,
// either way we want to clear the stashed views.
mFrameLoader->SetDetachedSubdocFrame(nullptr, nullptr);
nsSubDocumentFrame* frame = do_QueryFrame(mFrameElement->GetPrimaryFrame());
if ((!frame && mHideViewerIfFrameless) ||
mPresShell->IsDestroying()) {
// Either the frame element has no nsIFrame or the presshell is being
// destroyed. Hide the nsFrameLoader, which destroys the presentation.
mFrameLoader->Hide();
}
return NS_OK;
}
private:
nsCOMPtr<nsIContent> mFrameElement;
RefPtr<nsFrameLoader> mFrameLoader;
nsCOMPtr<nsIPresShell> mPresShell;
bool mHideViewerIfFrameless;
};
static nsView*
BeginSwapDocShellsForViews(nsView* aSibling);
void
nsSubDocumentFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
if (mPostedReflowCallback) {
PresContext()->PresShell()->CancelReflowCallback(this);
mPostedReflowCallback = false;
}
// Detach the subdocument's views and stash them in the frame loader.
// We can then reattach them if we're being reframed (for example if
// the frame has been made position:fixed).
RefPtr<nsFrameLoader> frameloader = FrameLoader();
if (frameloader) {
nsView* detachedViews = ::BeginSwapDocShellsForViews(mInnerView->GetFirstChild());
if (detachedViews && detachedViews->GetFrame()) {
MOZ_ASSERT(mContent->OwnerDoc());
frameloader->SetDetachedSubdocFrame(
detachedViews->GetFrame(), mContent->OwnerDoc());
// We call nsFrameLoader::HideViewer() in a script runner so that we can
// safely determine whether the frame is being reframed or destroyed.
nsContentUtils::AddScriptRunner(
new nsHideViewer(mContent,
frameloader,
PresContext()->PresShell(),
(mDidCreateDoc || mCallingShow)));
} else {
frameloader->SetDetachedSubdocFrame(nullptr, nullptr);
if (mDidCreateDoc || mCallingShow) {
frameloader->Hide();
}
}
}
nsAtomicContainerFrame::DestroyFrom(aDestructRoot);
}
CSSIntSize
nsSubDocumentFrame::GetMarginAttributes()
{
CSSIntSize result(-1, -1);
nsGenericHTMLElement *content = nsGenericHTMLElement::FromContent(mContent);
if (content) {
const nsAttrValue* attr = content->GetParsedAttr(nsGkAtoms::marginwidth);
if (attr && attr->Type() == nsAttrValue::eInteger)
result.width = attr->GetIntegerValue();
attr = content->GetParsedAttr(nsGkAtoms::marginheight);
if (attr && attr->Type() == nsAttrValue::eInteger)
result.height = attr->GetIntegerValue();
}
return result;
}
nsFrameLoader*
nsSubDocumentFrame::FrameLoader()
{
nsIContent* content = GetContent();
if (!content)
return nullptr;
if (!mFrameLoader) {
nsCOMPtr<nsIFrameLoaderOwner> loaderOwner = do_QueryInterface(content);
if (loaderOwner) {
mFrameLoader = loaderOwner->GetFrameLoader();
}
}
return mFrameLoader;
}
// XXX this should be called ObtainDocShell or something like that,
// to indicate that it could have side effects
nsresult
nsSubDocumentFrame::GetDocShell(nsIDocShell **aDocShell)
{
*aDocShell = nullptr;
NS_ENSURE_STATE(FrameLoader());
return mFrameLoader->GetDocShell(aDocShell);
}
static void
DestroyDisplayItemDataForFrames(nsIFrame* aFrame)
{
FrameLayerBuilder::DestroyDisplayItemDataFor(aFrame);
nsIFrame::ChildListIterator lists(aFrame);
for (; !lists.IsDone(); lists.Next()) {
nsFrameList::Enumerator childFrames(lists.CurrentList());
for (; !childFrames.AtEnd(); childFrames.Next()) {
DestroyDisplayItemDataForFrames(childFrames.get());
}
}
}
static bool
BeginSwapDocShellsForDocument(nsIDocument* aDocument, void*)
{
NS_PRECONDITION(aDocument, "");
nsIPresShell* shell = aDocument->GetShell();
if (shell) {
// Disable painting while the views are detached, see bug 946929.
shell->SetNeverPainting(true);
nsIFrame* rootFrame = shell->GetRootFrame();
if (rootFrame) {
::DestroyDisplayItemDataForFrames(rootFrame);
}
}
aDocument->EnumerateActivityObservers(
nsPluginFrame::BeginSwapDocShells, nullptr);
aDocument->EnumerateSubDocuments(BeginSwapDocShellsForDocument, nullptr);
return true;
}
static nsView*
BeginSwapDocShellsForViews(nsView* aSibling)
{
// Collect the removed sibling views in reverse order in 'removedViews'.
nsView* removedViews = nullptr;
while (aSibling) {
nsIDocument* doc = ::GetDocumentFromView(aSibling);
if (doc) {
::BeginSwapDocShellsForDocument(doc, nullptr);
}
nsView* next = aSibling->GetNextSibling();
aSibling->GetViewManager()->RemoveChild(aSibling);
aSibling->SetNextSibling(removedViews);
removedViews = aSibling;
aSibling = next;
}
return removedViews;
}
static void
InsertViewsInReverseOrder(nsView* aSibling, nsView* aParent)
{
NS_PRECONDITION(aParent, "");
NS_PRECONDITION(!aParent->GetFirstChild(), "inserting into non-empty list");
nsViewManager* vm = aParent->GetViewManager();
while (aSibling) {
nsView* next = aSibling->GetNextSibling();
aSibling->SetNextSibling(nullptr);
// true means 'after' in document order which is 'before' in view order,
// so this call prepends the child, thus reversing the siblings as we go.
vm->InsertChild(aParent, aSibling, nullptr, true);
aSibling = next;
}
}
nsresult
nsSubDocumentFrame::BeginSwapDocShells(nsIFrame* aOther)
{
if (!aOther || aOther->GetType() != nsGkAtoms::subDocumentFrame) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
if (!mFrameLoader || !mDidCreateDoc || mCallingShow ||
!other->mFrameLoader || !other->mDidCreateDoc) {
return NS_ERROR_NOT_IMPLEMENTED;
}
if (mInnerView && other->mInnerView) {
nsView* ourSubdocViews = mInnerView->GetFirstChild();
nsView* ourRemovedViews = ::BeginSwapDocShellsForViews(ourSubdocViews);
nsView* otherSubdocViews = other->mInnerView->GetFirstChild();
nsView* otherRemovedViews = ::BeginSwapDocShellsForViews(otherSubdocViews);
::InsertViewsInReverseOrder(ourRemovedViews, other->mInnerView);
::InsertViewsInReverseOrder(otherRemovedViews, mInnerView);
}
mFrameLoader.swap(other->mFrameLoader);
return NS_OK;
}
static bool
EndSwapDocShellsForDocument(nsIDocument* aDocument, void*)
{
NS_PRECONDITION(aDocument, "");
// Our docshell and view trees have been updated for the new hierarchy.
// Now also update all nsDeviceContext::mWidget to that of the
// container view in the new hierarchy.
nsCOMPtr<nsIDocShell> ds = aDocument->GetDocShell();
if (ds) {
nsCOMPtr<nsIContentViewer> cv;
ds->GetContentViewer(getter_AddRefs(cv));
while (cv) {
RefPtr<nsPresContext> pc;
cv->GetPresContext(getter_AddRefs(pc));
if (pc && pc->GetPresShell()) {
pc->GetPresShell()->SetNeverPainting(ds->IsInvisible());
}
nsDeviceContext* dc = pc ? pc->DeviceContext() : nullptr;
if (dc) {
nsView* v = cv->FindContainerView();
dc->Init(v ? v->GetNearestWidget(nullptr) : nullptr);
}
nsCOMPtr<nsIContentViewer> prev;
cv->GetPreviousViewer(getter_AddRefs(prev));
cv = prev;
}
}
aDocument->EnumerateActivityObservers(
nsPluginFrame::EndSwapDocShells, nullptr);
aDocument->EnumerateSubDocuments(EndSwapDocShellsForDocument, nullptr);
return true;
}
static void
EndSwapDocShellsForViews(nsView* aSibling)
{
for ( ; aSibling; aSibling = aSibling->GetNextSibling()) {
nsIDocument* doc = ::GetDocumentFromView(aSibling);
if (doc) {
::EndSwapDocShellsForDocument(doc, nullptr);
}
nsIFrame *frame = aSibling->GetFrame();
if (frame) {
nsIFrame* parent = nsLayoutUtils::GetCrossDocParentFrame(frame);
if (parent->HasAnyStateBits(NS_FRAME_IN_POPUP)) {
nsIFrame::AddInPopupStateBitToDescendants(frame);
} else {
nsIFrame::RemoveInPopupStateBitFromDescendants(frame);
}
if (frame->HasInvalidFrameInSubtree()) {
while (parent && !parent->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT | NS_FRAME_IS_NONDISPLAY)) {
parent->AddStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT);
parent = nsLayoutUtils::GetCrossDocParentFrame(parent);
}
}
}
}
}
void
nsSubDocumentFrame::EndSwapDocShells(nsIFrame* aOther)
{
nsSubDocumentFrame* other = static_cast<nsSubDocumentFrame*>(aOther);
nsWeakFrame weakThis(this);
nsWeakFrame weakOther(aOther);
if (mInnerView) {
::EndSwapDocShellsForViews(mInnerView->GetFirstChild());
}
if (other->mInnerView) {
::EndSwapDocShellsForViews(other->mInnerView->GetFirstChild());
}
// Now make sure we reflow both frames, in case their contents
// determine their size.
// And repaint them, for good measure, in case there's nothing
// interesting that happens during reflow.
if (weakThis.IsAlive()) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
InvalidateFrameSubtree();
}
if (weakOther.IsAlive()) {
other->PresContext()->PresShell()->
FrameNeedsReflow(other, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
other->InvalidateFrameSubtree();
}
}
nsView*
nsSubDocumentFrame::EnsureInnerView()
{
if (mInnerView) {
return mInnerView;
}
// create, init, set the parent of the view
nsView* outerView = GetView();
NS_ASSERTION(outerView, "Must have an outer view already");
nsRect viewBounds(0, 0, 0, 0); // size will be fixed during reflow
nsViewManager* viewMan = outerView->GetViewManager();
nsView* innerView = viewMan->CreateView(viewBounds, outerView);
if (!innerView) {
NS_ERROR("Could not create inner view");
return nullptr;
}
mInnerView = innerView;
viewMan->InsertChild(outerView, innerView, nullptr, true);
return mInnerView;
}
nsIFrame*
nsSubDocumentFrame::ObtainIntrinsicSizeFrame()
{
nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(GetContent());
if (olc) {
// We are an HTML <object>, <embed> or <applet> (a replaced element).
// Try to get an nsIFrame for our sub-document's document element
nsIFrame* subDocRoot = nullptr;
nsCOMPtr<nsIDocShell> docShell;
GetDocShell(getter_AddRefs(docShell));
if (docShell) {
nsCOMPtr<nsIPresShell> presShell = docShell->GetPresShell();
if (presShell) {
nsIScrollableFrame* scrollable = presShell->GetRootScrollFrameAsScrollable();
if (scrollable) {
nsIFrame* scrolled = scrollable->GetScrolledFrame();
if (scrolled) {
subDocRoot = scrolled->PrincipalChildList().FirstChild();
}
}
}
}
if (subDocRoot && subDocRoot->GetContent() &&
subDocRoot->GetContent()->NodeInfo()->Equals(nsGkAtoms::svg, kNameSpaceID_SVG)) {
return subDocRoot; // SVG documents have an intrinsic size
}
}
return nullptr;
}
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