1470 lines
59 KiB
C++
1470 lines
59 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/RestyleManagerBase.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/StyleSetHandle.h"
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#include "mozilla/StyleSetHandleInlines.h" // for Ptr::HasStateDependentStyle
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#include "ActiveLayerTracker.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsCSSRendering.h"
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#include "nsIFrame.h"
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#include "nsIFrameInlines.h" // for IsAbsPosContainingBlock
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#include "nsPlaceholderFrame.h"
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#include "nsStyleChangeList.h"
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#include "nsStyleStructInlines.h" // for HasTransform
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#include "nsSVGEffects.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGUtils.h"
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#include "nsViewportFrame.h"
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#include "StickyScrollContainer.h"
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#include "SVGTextFrame.h"
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using namespace mozilla;
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using namespace mozilla::layers;
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namespace mozilla {
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RestyleManagerBase::RestyleManagerBase(nsPresContext* aPresContext)
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: mPresContext(aPresContext)
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, mRestyleGeneration(1)
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, mHoverGeneration(0)
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, mObservingRefreshDriver(false)
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, mInStyleRefresh(false)
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{
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MOZ_ASSERT(mPresContext);
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}
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/**
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* Calculates the change hint and the restyle hint for a given content state
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* change.
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*
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* This is called from both Restyle managers.
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*/
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void
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RestyleManagerBase::ContentStateChangedInternal(Element* aElement,
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EventStates aStateMask,
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nsChangeHint* aOutChangeHint,
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nsRestyleHint* aOutRestyleHint)
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{
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MOZ_ASSERT(aOutChangeHint);
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MOZ_ASSERT(aOutRestyleHint);
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StyleSetHandle styleSet = PresContext()->StyleSet();
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NS_ASSERTION(styleSet, "couldn't get style set");
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*aOutChangeHint = nsChangeHint(0);
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// Any change to a content state that affects which frames we construct
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// must lead to a frame reconstruct here if we already have a frame.
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// Note that we never decide through non-CSS means to not create frames
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// based on content states, so if we already don't have a frame we don't
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// need to force a reframe -- if it's needed, the HasStateDependentStyle
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// call will handle things.
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nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
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CSSPseudoElementType pseudoType = CSSPseudoElementType::NotPseudo;
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if (primaryFrame) {
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// If it's generated content, ignore LOADING/etc state changes on it.
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if (!primaryFrame->IsGeneratedContentFrame() &&
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aStateMask.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN |
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NS_EVENT_STATE_USERDISABLED |
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NS_EVENT_STATE_SUPPRESSED |
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NS_EVENT_STATE_LOADING)) {
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*aOutChangeHint = nsChangeHint_ReconstructFrame;
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} else {
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uint8_t app = primaryFrame->StyleDisplay()->mAppearance;
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if (app) {
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nsITheme* theme = PresContext()->GetTheme();
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if (theme &&
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theme->ThemeSupportsWidget(PresContext(), primaryFrame, app)) {
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bool repaint = false;
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theme->WidgetStateChanged(primaryFrame, app, nullptr, &repaint,
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nullptr);
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if (repaint) {
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*aOutChangeHint |= nsChangeHint_RepaintFrame;
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}
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}
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}
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}
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pseudoType = primaryFrame->StyleContext()->GetPseudoType();
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primaryFrame->ContentStatesChanged(aStateMask);
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}
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if (pseudoType >= CSSPseudoElementType::Count) {
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*aOutRestyleHint = styleSet->HasStateDependentStyle(aElement, aStateMask);
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} else if (nsCSSPseudoElements::PseudoElementSupportsUserActionState(
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pseudoType)) {
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// If aElement is a pseudo-element, we want to check to see whether there
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// are any state-dependent rules applying to that pseudo.
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Element* ancestor =
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ElementForStyleContext(nullptr, primaryFrame, pseudoType);
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*aOutRestyleHint = styleSet->HasStateDependentStyle(ancestor, pseudoType,
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aElement, aStateMask);
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} else {
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*aOutRestyleHint = nsRestyleHint(0);
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}
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if (aStateMask.HasState(NS_EVENT_STATE_HOVER) && *aOutRestyleHint != 0) {
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IncrementHoverGeneration();
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}
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if (aStateMask.HasState(NS_EVENT_STATE_VISITED)) {
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// Exposing information to the page about whether the link is
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// visited or not isn't really something we can worry about here.
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// FIXME: We could probably do this a bit better.
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*aOutChangeHint |= nsChangeHint_RepaintFrame;
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}
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}
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/* static */ nsCString
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RestyleManagerBase::RestyleHintToString(nsRestyleHint aHint)
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{
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nsCString result;
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bool any = false;
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const char* names[] = {
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"Self", "SomeDescendants", "Subtree", "LaterSiblings", "CSSTransitions",
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"CSSAnimations", "SVGAttrAnimations", "StyleAttribute",
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"StyleAttribute_Animations", "Force", "ForceDescendants"
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};
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uint32_t hint = aHint & ((1 << ArrayLength(names)) - 1);
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uint32_t rest = aHint & ~((1 << ArrayLength(names)) - 1);
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for (uint32_t i = 0; i < ArrayLength(names); i++) {
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if (hint & (1 << i)) {
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if (any) {
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result.AppendLiteral(" | ");
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}
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result.AppendPrintf("eRestyle_%s", names[i]);
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any = true;
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}
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}
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if (rest) {
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if (any) {
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result.AppendLiteral(" | ");
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}
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result.AppendPrintf("0x%0x", rest);
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} else {
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if (!any) {
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result.AppendLiteral("0");
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}
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}
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return result;
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}
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#ifdef DEBUG
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/* static */ nsCString
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RestyleManagerBase::ChangeHintToString(nsChangeHint aHint)
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{
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nsCString result;
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bool any = false;
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const char* names[] = {
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"RepaintFrame", "NeedReflow", "ClearAncestorIntrinsics",
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"ClearDescendantIntrinsics", "NeedDirtyReflow", "SyncFrameView",
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"UpdateCursor", "UpdateEffects", "UpdateOpacityLayer",
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"UpdateTransformLayer", "ReconstructFrame", "UpdateOverflow",
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"UpdateSubtreeOverflow", "UpdatePostTransformOverflow",
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"UpdateParentOverflow",
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"ChildrenOnlyTransform", "RecomputePosition", "AddOrRemoveTransform",
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"BorderStyleNoneChange", "UpdateTextPath", "SchedulePaint",
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"NeutralChange", "InvalidateRenderingObservers",
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"ReflowChangesSizeOrPosition", "UpdateComputedBSize",
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"UpdateUsesOpacity", "UpdateBackgroundPosition",
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"AddOrRemoveTransform", "ScrollbarChange",
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};
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static_assert(nsChangeHint_AllHints == (1 << ArrayLength(names)) - 1,
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"Name list doesn't match change hints.");
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uint32_t hint = aHint & ((1 << ArrayLength(names)) - 1);
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uint32_t rest = aHint & ~((1 << ArrayLength(names)) - 1);
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if (hint == nsChangeHint_Hints_NotHandledForDescendants) {
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result.AppendLiteral("nsChangeHint_Hints_NotHandledForDescendants");
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hint = 0;
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any = true;
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} else {
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if ((hint & NS_STYLE_HINT_REFLOW) == NS_STYLE_HINT_REFLOW) {
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result.AppendLiteral("NS_STYLE_HINT_REFLOW");
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hint = hint & ~NS_STYLE_HINT_REFLOW;
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any = true;
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} else if ((hint & nsChangeHint_AllReflowHints) == nsChangeHint_AllReflowHints) {
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result.AppendLiteral("nsChangeHint_AllReflowHints");
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hint = hint & ~nsChangeHint_AllReflowHints;
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any = true;
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} else if ((hint & NS_STYLE_HINT_VISUAL) == NS_STYLE_HINT_VISUAL) {
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result.AppendLiteral("NS_STYLE_HINT_VISUAL");
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hint = hint & ~NS_STYLE_HINT_VISUAL;
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any = true;
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}
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}
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for (uint32_t i = 0; i < ArrayLength(names); i++) {
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if (hint & (1 << i)) {
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if (any) {
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result.AppendLiteral(" | ");
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}
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result.AppendPrintf("nsChangeHint_%s", names[i]);
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any = true;
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}
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}
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if (rest) {
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if (any) {
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result.AppendLiteral(" | ");
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}
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result.AppendPrintf("0x%0x", rest);
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} else {
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if (!any) {
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result.AppendLiteral("nsChangeHint(0)");
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}
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}
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return result;
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}
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#endif
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void
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RestyleManagerBase::PostRestyleEventInternal(bool aForLazyConstruction)
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{
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// Make sure we're not in a style refresh; if we are, we still have
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// a call to ProcessPendingRestyles coming and there's no need to
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// add ourselves as a refresh observer until then.
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bool inRefresh = !aForLazyConstruction && mInStyleRefresh;
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nsIPresShell* presShell = PresContext()->PresShell();
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if (!ObservingRefreshDriver() && !inRefresh) {
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SetObservingRefreshDriver(PresContext()->RefreshDriver()->
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AddStyleFlushObserver(presShell));
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}
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// Unconditionally flag our document as needing a flush. The other
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// option here would be a dedicated boolean to track whether we need
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// to do so (set here and unset in ProcessPendingRestyles).
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presShell->GetDocument()->SetNeedStyleFlush();
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}
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/**
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* Frame construction helpers follow.
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*/
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#ifdef DEBUG
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static bool gInApplyRenderingChangeToTree = false;
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#endif
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#ifdef DEBUG
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static void
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DumpContext(nsIFrame* aFrame, nsStyleContext* aContext)
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{
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if (aFrame) {
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fputs("frame: ", stdout);
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nsAutoString name;
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aFrame->GetFrameName(name);
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fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
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fprintf(stdout, " (%p)", static_cast<void*>(aFrame));
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}
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if (aContext) {
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fprintf(stdout, " style: %p ", static_cast<void*>(aContext));
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nsIAtom* pseudoTag = aContext->GetPseudo();
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if (pseudoTag) {
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nsAutoString buffer;
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pseudoTag->ToString(buffer);
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fputs(NS_LossyConvertUTF16toASCII(buffer).get(), stdout);
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fputs(" ", stdout);
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}
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fputs("{}\n", stdout);
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}
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}
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static void
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VerifySameTree(nsStyleContext* aContext1, nsStyleContext* aContext2)
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{
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nsStyleContext* top1 = aContext1;
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nsStyleContext* top2 = aContext2;
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nsStyleContext* parent;
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for (;;) {
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parent = top1->GetParent();
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if (!parent)
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break;
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top1 = parent;
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}
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for (;;) {
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parent = top2->GetParent();
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if (!parent)
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break;
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top2 = parent;
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}
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NS_ASSERTION(top1 == top2,
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"Style contexts are not in the same style context tree");
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}
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static void
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VerifyContextParent(nsIFrame* aFrame, nsStyleContext* aContext,
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nsStyleContext* aParentContext)
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{
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// get the contexts not provided
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if (!aContext) {
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aContext = aFrame->StyleContext();
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}
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if (!aParentContext) {
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nsIFrame* providerFrame;
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aParentContext = aFrame->GetParentStyleContext(&providerFrame);
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// aParentContext could still be null
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}
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NS_ASSERTION(aContext, "Failure to get required contexts");
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nsStyleContext* actualParentContext = aContext->GetParent();
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if (aParentContext) {
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if (aParentContext != actualParentContext) {
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DumpContext(aFrame, aContext);
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if (aContext == aParentContext) {
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NS_ERROR("Using parent's style context");
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} else {
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NS_ERROR("Wrong parent style context");
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fputs("Wrong parent style context: ", stdout);
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DumpContext(nullptr, actualParentContext);
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fputs("should be using: ", stdout);
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DumpContext(nullptr, aParentContext);
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VerifySameTree(actualParentContext, aParentContext);
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fputs("\n", stdout);
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}
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}
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} else {
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if (actualParentContext) {
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NS_ERROR("Have parent context and shouldn't");
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DumpContext(aFrame, aContext);
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fputs("Has parent context: ", stdout);
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DumpContext(nullptr, actualParentContext);
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fputs("Should be null\n\n", stdout);
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}
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}
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nsStyleContext* childStyleIfVisited = aContext->GetStyleIfVisited();
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// Either childStyleIfVisited has aContext->GetParent()->GetStyleIfVisited()
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// as the parent or it has a different rulenode from aContext _and_ has
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// aContext->GetParent() as the parent.
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if (childStyleIfVisited &&
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!((childStyleIfVisited->RuleNode() != aContext->RuleNode() &&
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childStyleIfVisited->GetParent() == aContext->GetParent()) ||
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childStyleIfVisited->GetParent() ==
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aContext->GetParent()->GetStyleIfVisited())) {
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NS_ERROR("Visited style has wrong parent");
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DumpContext(aFrame, aContext);
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fputs("\n", stdout);
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}
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}
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static void
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VerifyStyleTree(nsIFrame* aFrame)
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{
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nsStyleContext* context = aFrame->StyleContext();
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VerifyContextParent(aFrame, context, nullptr);
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nsIFrame::ChildListIterator lists(aFrame);
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for (; !lists.IsDone(); lists.Next()) {
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for (nsIFrame* child : lists.CurrentList()) {
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if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
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// only do frames that are in flow
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if (nsGkAtoms::placeholderFrame == child->GetType()) {
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// placeholder: first recurse and verify the out of flow frame,
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// then verify the placeholder's context
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nsIFrame* outOfFlowFrame =
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nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
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// recurse to out of flow frame, letting the parent context get resolved
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do {
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VerifyStyleTree(outOfFlowFrame);
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} while ((outOfFlowFrame = outOfFlowFrame->GetNextContinuation()));
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// verify placeholder using the parent frame's context as
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// parent context
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VerifyContextParent(child, nullptr, nullptr);
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} else { // regular frame
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VerifyStyleTree(child);
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}
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}
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}
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}
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// do additional contexts
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int32_t contextIndex = 0;
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for (nsStyleContext* extraContext;
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(extraContext = aFrame->GetAdditionalStyleContext(contextIndex));
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++contextIndex) {
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VerifyContextParent(aFrame, extraContext, context);
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}
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}
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void
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RestyleManagerBase::DebugVerifyStyleTree(nsIFrame* aFrame)
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{
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if (aFrame) {
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VerifyStyleTree(aFrame);
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}
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}
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#endif // DEBUG
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/**
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* Sync views on aFrame and all of aFrame's descendants (following placeholders),
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* if aChange has nsChangeHint_SyncFrameView.
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* Calls DoApplyRenderingChangeToTree on all aFrame's out-of-flow descendants
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* (following placeholders), if aChange has nsChangeHint_RepaintFrame.
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* aFrame should be some combination of nsChangeHint_SyncFrameView,
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* nsChangeHint_RepaintFrame, nsChangeHint_UpdateOpacityLayer and
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* nsChangeHint_SchedulePaint, nothing else.
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*/
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static void SyncViewsAndInvalidateDescendants(nsIFrame* aFrame,
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nsChangeHint aChange);
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static void StyleChangeReflow(nsIFrame* aFrame, nsChangeHint aHint);
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/**
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* To handle nsChangeHint_ChildrenOnlyTransform we must iterate over the child
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* frames of the SVG frame concerned. This helper function is used to find that
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* SVG frame when we encounter nsChangeHint_ChildrenOnlyTransform to ensure
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* that we iterate over the intended children, since sometimes we end up
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* handling that hint while processing hints for one of the SVG frame's
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* ancestor frames.
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*
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* The reason that we sometimes end up trying to process the hint for an
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* ancestor of the SVG frame that the hint is intended for is due to the way we
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* process restyle events. ApplyRenderingChangeToTree adjusts the frame from
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* the restyled element's principle frame to one of its ancestor frames based
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* on what nsCSSRendering::FindBackground returns, since the background style
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* may have been propagated up to an ancestor frame. Processing hints using an
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* ancestor frame is fine in general, but nsChangeHint_ChildrenOnlyTransform is
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* a special case since it is intended to update the children of a specific
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* frame.
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*/
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static nsIFrame*
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GetFrameForChildrenOnlyTransformHint(nsIFrame* aFrame)
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{
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if (aFrame->GetType() == nsGkAtoms::viewportFrame) {
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// This happens if the root-<svg> is fixed positioned, in which case we
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// can't use aFrame->GetContent() to find the primary frame, since
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// GetContent() returns nullptr for ViewportFrame.
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aFrame = aFrame->PrincipalChildList().FirstChild();
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}
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// For an nsHTMLScrollFrame, this will get the SVG frame that has the
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// children-only transforms:
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aFrame = aFrame->GetContent()->GetPrimaryFrame();
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if (aFrame->GetType() == nsGkAtoms::svgOuterSVGFrame) {
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aFrame = aFrame->PrincipalChildList().FirstChild();
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MOZ_ASSERT(aFrame->GetType() == nsGkAtoms::svgOuterSVGAnonChildFrame,
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"Where is the nsSVGOuterSVGFrame's anon child??");
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}
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MOZ_ASSERT(aFrame->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer),
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"Children-only transforms only expected on SVG frames");
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return aFrame;
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}
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// Returns true if this function managed to successfully move a frame, and
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// false if it could not process the position change, and a reflow should
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// be performed instead.
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bool
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RecomputePosition(nsIFrame* aFrame)
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{
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// Don't process position changes on table frames, since we already handle
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// the dynamic position change on the table wrapper frame, and the
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// reflow-based fallback code path also ignores positions on inner table
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// frames.
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if (aFrame->GetType() == nsGkAtoms::tableFrame) {
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return true;
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}
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const nsStyleDisplay* display = aFrame->StyleDisplay();
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// Changes to the offsets of a non-positioned element can safely be ignored.
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if (display->mPosition == NS_STYLE_POSITION_STATIC) {
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return true;
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}
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// Don't process position changes on frames which have views or the ones which
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// have a view somewhere in their descendants, because the corresponding view
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// needs to be repositioned properly as well.
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if (aFrame->HasView() ||
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(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) {
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StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
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return false;
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}
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|
|
aFrame->SchedulePaint();
|
|
|
|
// For relative positioning, we can simply update the frame rect
|
|
if (display->IsRelativelyPositionedStyle()) {
|
|
// Move the frame
|
|
if (display->mPosition == NS_STYLE_POSITION_STICKY) {
|
|
// Update sticky positioning for an entire element at once, starting with
|
|
// the first continuation or ib-split sibling.
|
|
// It's rare that the frame we already have isn't already the first
|
|
// continuation or ib-split sibling, but it can happen when styles differ
|
|
// across continuations such as ::first-line or ::first-letter, and in
|
|
// those cases we will generally (but maybe not always) do the work twice.
|
|
nsIFrame* firstContinuation =
|
|
nsLayoutUtils::FirstContinuationOrIBSplitSibling(aFrame);
|
|
|
|
StickyScrollContainer::ComputeStickyOffsets(firstContinuation);
|
|
StickyScrollContainer* ssc =
|
|
StickyScrollContainer::GetStickyScrollContainerForFrame(
|
|
firstContinuation);
|
|
if (ssc) {
|
|
ssc->PositionContinuations(firstContinuation);
|
|
}
|
|
} else {
|
|
MOZ_ASSERT(NS_STYLE_POSITION_RELATIVE == display->mPosition,
|
|
"Unexpected type of positioning");
|
|
for (nsIFrame* cont = aFrame; cont;
|
|
cont = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
nsIFrame* cb = cont->GetContainingBlock();
|
|
nsMargin newOffsets;
|
|
WritingMode wm = cb->GetWritingMode();
|
|
const LogicalSize size(wm, cb->GetContentRectRelativeToSelf().Size());
|
|
|
|
ReflowInput::ComputeRelativeOffsets(wm, cont, size, newOffsets);
|
|
NS_ASSERTION(newOffsets.left == -newOffsets.right &&
|
|
newOffsets.top == -newOffsets.bottom,
|
|
"ComputeRelativeOffsets should return valid results");
|
|
|
|
// ReflowInput::ApplyRelativePositioning would work here, but
|
|
// since we've already checked mPosition and aren't changing the frame's
|
|
// normal position, go ahead and add the offsets directly.
|
|
// First, we need to ensure that the normal position is stored though.
|
|
nsPoint normalPosition = cont->GetNormalPosition();
|
|
if (!cont->GetProperty(nsIFrame::NormalPositionProperty())) {
|
|
cont->SetProperty(nsIFrame::NormalPositionProperty(),
|
|
new nsPoint(normalPosition));
|
|
}
|
|
cont->SetPosition(normalPosition +
|
|
nsPoint(newOffsets.left, newOffsets.top));
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// For the absolute positioning case, set up a fake HTML reflow state for
|
|
// the frame, and then get the offsets and size from it. If the frame's size
|
|
// doesn't need to change, we can simply update the frame position. Otherwise
|
|
// we fall back to a reflow.
|
|
nsRenderingContext rc(
|
|
aFrame->PresContext()->PresShell()->CreateReferenceRenderingContext());
|
|
|
|
// Construct a bogus parent reflow state so that there's a usable
|
|
// containing block reflow state.
|
|
nsIFrame* parentFrame = aFrame->GetParent();
|
|
WritingMode parentWM = parentFrame->GetWritingMode();
|
|
WritingMode frameWM = aFrame->GetWritingMode();
|
|
LogicalSize parentSize = parentFrame->GetLogicalSize();
|
|
|
|
nsFrameState savedState = parentFrame->GetStateBits();
|
|
ReflowInput parentReflowInput(aFrame->PresContext(), parentFrame, &rc,
|
|
parentSize);
|
|
parentFrame->RemoveStateBits(~nsFrameState(0));
|
|
parentFrame->AddStateBits(savedState);
|
|
|
|
// The bogus parent state here was created with no parent state of its own,
|
|
// and therefore it won't have an mCBReflowInput set up.
|
|
// But we may need one (for InitCBReflowInput in a child state), so let's
|
|
// try to create one here for the cases where it will be needed.
|
|
Maybe<ReflowInput> cbReflowInput;
|
|
nsIFrame* cbFrame = parentFrame->GetContainingBlock();
|
|
if (cbFrame && (aFrame->GetContainingBlock() != parentFrame ||
|
|
parentFrame->GetType() == nsGkAtoms::tableFrame)) {
|
|
LogicalSize cbSize = cbFrame->GetLogicalSize();
|
|
cbReflowInput.emplace(cbFrame->PresContext(), cbFrame, &rc, cbSize);
|
|
cbReflowInput->ComputedPhysicalMargin() = cbFrame->GetUsedMargin();
|
|
cbReflowInput->ComputedPhysicalPadding() = cbFrame->GetUsedPadding();
|
|
cbReflowInput->ComputedPhysicalBorderPadding() =
|
|
cbFrame->GetUsedBorderAndPadding();
|
|
parentReflowInput.mCBReflowInput = cbReflowInput.ptr();
|
|
}
|
|
|
|
NS_WARNING_ASSERTION(parentSize.ISize(parentWM) != NS_INTRINSICSIZE &&
|
|
parentSize.BSize(parentWM) != NS_INTRINSICSIZE,
|
|
"parentSize should be valid");
|
|
parentReflowInput.SetComputedISize(std::max(parentSize.ISize(parentWM), 0));
|
|
parentReflowInput.SetComputedBSize(std::max(parentSize.BSize(parentWM), 0));
|
|
parentReflowInput.ComputedPhysicalMargin().SizeTo(0, 0, 0, 0);
|
|
|
|
parentReflowInput.ComputedPhysicalPadding() = parentFrame->GetUsedPadding();
|
|
parentReflowInput.ComputedPhysicalBorderPadding() =
|
|
parentFrame->GetUsedBorderAndPadding();
|
|
LogicalSize availSize = parentSize.ConvertTo(frameWM, parentWM);
|
|
availSize.BSize(frameWM) = NS_INTRINSICSIZE;
|
|
|
|
ViewportFrame* viewport = do_QueryFrame(parentFrame);
|
|
nsSize cbSize = viewport ?
|
|
viewport->AdjustReflowInputAsContainingBlock(&parentReflowInput).Size()
|
|
: aFrame->GetContainingBlock()->GetSize();
|
|
const nsMargin& parentBorder =
|
|
parentReflowInput.mStyleBorder->GetComputedBorder();
|
|
cbSize -= nsSize(parentBorder.LeftRight(), parentBorder.TopBottom());
|
|
LogicalSize lcbSize(frameWM, cbSize);
|
|
ReflowInput reflowInput(aFrame->PresContext(), parentReflowInput, aFrame,
|
|
availSize, &lcbSize);
|
|
nsSize computedSize(reflowInput.ComputedWidth(),
|
|
reflowInput.ComputedHeight());
|
|
computedSize.width += reflowInput.ComputedPhysicalBorderPadding().LeftRight();
|
|
if (computedSize.height != NS_INTRINSICSIZE) {
|
|
computedSize.height +=
|
|
reflowInput.ComputedPhysicalBorderPadding().TopBottom();
|
|
}
|
|
nsSize size = aFrame->GetSize();
|
|
// The RecomputePosition hint is not used if any offset changed between auto
|
|
// and non-auto. If computedSize.height == NS_INTRINSICSIZE then the new
|
|
// element height will be its intrinsic height, and since 'top' and 'bottom''s
|
|
// auto-ness hasn't changed, the old height must also be its intrinsic
|
|
// height, which we can assume hasn't changed (or reflow would have
|
|
// been triggered).
|
|
if (computedSize.width == size.width &&
|
|
(computedSize.height == NS_INTRINSICSIZE || computedSize.height == size.height)) {
|
|
// If we're solving for 'left' or 'top', then compute it here, in order to
|
|
// match the reflow code path.
|
|
if (NS_AUTOOFFSET == reflowInput.ComputedPhysicalOffsets().left) {
|
|
reflowInput.ComputedPhysicalOffsets().left = cbSize.width -
|
|
reflowInput.ComputedPhysicalOffsets().right -
|
|
reflowInput.ComputedPhysicalMargin().right -
|
|
size.width -
|
|
reflowInput.ComputedPhysicalMargin().left;
|
|
}
|
|
|
|
if (NS_AUTOOFFSET == reflowInput.ComputedPhysicalOffsets().top) {
|
|
reflowInput.ComputedPhysicalOffsets().top = cbSize.height -
|
|
reflowInput.ComputedPhysicalOffsets().bottom -
|
|
reflowInput.ComputedPhysicalMargin().bottom -
|
|
size.height -
|
|
reflowInput.ComputedPhysicalMargin().top;
|
|
}
|
|
|
|
// Move the frame
|
|
nsPoint pos(parentBorder.left + reflowInput.ComputedPhysicalOffsets().left +
|
|
reflowInput.ComputedPhysicalMargin().left,
|
|
parentBorder.top + reflowInput.ComputedPhysicalOffsets().top +
|
|
reflowInput.ComputedPhysicalMargin().top);
|
|
aFrame->SetPosition(pos);
|
|
|
|
return true;
|
|
}
|
|
|
|
// Fall back to a reflow
|
|
StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
HasBoxAncestor(nsIFrame* aFrame)
|
|
{
|
|
for (nsIFrame* f = aFrame; f; f = f->GetParent()) {
|
|
if (f->IsXULBoxFrame()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Return true if aFrame's subtree has placeholders for out-of-flow content
|
|
* whose 'position' style's bit in aPositionMask is set.
|
|
*/
|
|
static bool
|
|
FrameHasPositionedPlaceholderDescendants(nsIFrame* aFrame,
|
|
uint32_t aPositionMask)
|
|
{
|
|
MOZ_ASSERT(aPositionMask & (1 << NS_STYLE_POSITION_FIXED));
|
|
|
|
for (nsIFrame::ChildListIterator lists(aFrame); !lists.IsDone(); lists.Next()) {
|
|
for (nsIFrame* f : lists.CurrentList()) {
|
|
if (f->GetType() == nsGkAtoms::placeholderFrame) {
|
|
nsIFrame* outOfFlow =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
|
|
// If SVG text frames could appear here, they could confuse us since
|
|
// they ignore their position style ... but they can't.
|
|
NS_ASSERTION(!outOfFlow->IsSVGText(),
|
|
"SVG text frames can't be out of flow");
|
|
if (aPositionMask & (1 << outOfFlow->StyleDisplay()->mPosition)) {
|
|
return true;
|
|
}
|
|
}
|
|
uint32_t positionMask = aPositionMask;
|
|
// NOTE: It's tempting to check f->IsAbsPosContainingBlock() or
|
|
// f->IsFixedPosContainingBlock() here. However, that would only
|
|
// be testing the *new* style of the frame, which might exclude
|
|
// descendants that currently have this frame as an abs-pos
|
|
// containing block. Taking the codepath where we don't reframe
|
|
// could lead to an unsafe call to
|
|
// cont->MarkAsNotAbsoluteContainingBlock() before we've reframed
|
|
// the descendant and taken it off the absolute list.
|
|
if (FrameHasPositionedPlaceholderDescendants(f, positionMask)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
NeedToReframeForAddingOrRemovingTransform(nsIFrame* aFrame)
|
|
{
|
|
static_assert(0 <= NS_STYLE_POSITION_ABSOLUTE &&
|
|
NS_STYLE_POSITION_ABSOLUTE < 32, "Style constant out of range");
|
|
static_assert(0 <= NS_STYLE_POSITION_FIXED &&
|
|
NS_STYLE_POSITION_FIXED < 32, "Style constant out of range");
|
|
|
|
uint32_t positionMask;
|
|
// Don't call aFrame->IsPositioned here, since that returns true if
|
|
// the frame already has a transform, and we want to ignore that here
|
|
if (aFrame->IsAbsolutelyPositioned() || aFrame->IsRelativelyPositioned()) {
|
|
// This frame is a container for abs-pos descendants whether or not it
|
|
// has a transform.
|
|
// So abs-pos descendants are no problem; we only need to reframe if
|
|
// we have fixed-pos descendants.
|
|
positionMask = 1 << NS_STYLE_POSITION_FIXED;
|
|
} else {
|
|
// This frame may not be a container for abs-pos descendants already.
|
|
// So reframe if we have abs-pos or fixed-pos descendants.
|
|
positionMask =
|
|
(1 << NS_STYLE_POSITION_FIXED) | (1 << NS_STYLE_POSITION_ABSOLUTE);
|
|
}
|
|
for (nsIFrame* f = aFrame; f;
|
|
f = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(f)) {
|
|
if (FrameHasPositionedPlaceholderDescendants(f, positionMask)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
RestyleManagerBase::GetNearestAncestorFrame(nsIContent* aContent)
|
|
{
|
|
nsIFrame* ancestorFrame = nullptr;
|
|
for (nsIContent* ancestor = aContent->GetParent();
|
|
ancestor && !ancestorFrame;
|
|
ancestor = ancestor->GetParent()) {
|
|
ancestorFrame = ancestor->GetPrimaryFrame();
|
|
}
|
|
return ancestorFrame;
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
RestyleManagerBase::GetNextBlockInInlineSibling(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(!aFrame->GetPrevContinuation(),
|
|
"must start with the first continuation");
|
|
// Might we have ib-split siblings?
|
|
if (!(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT)) {
|
|
// nothing more to do here
|
|
return nullptr;
|
|
}
|
|
|
|
return aFrame->GetProperty(nsIFrame::IBSplitSibling());
|
|
}
|
|
|
|
static void
|
|
DoApplyRenderingChangeToTree(nsIFrame* aFrame,
|
|
nsChangeHint aChange)
|
|
{
|
|
NS_PRECONDITION(gInApplyRenderingChangeToTree,
|
|
"should only be called within ApplyRenderingChangeToTree");
|
|
|
|
for ( ; aFrame; aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame)) {
|
|
// Invalidate and sync views on all descendant frames, following placeholders.
|
|
// We don't need to update transforms in SyncViewsAndInvalidateDescendants, because
|
|
// there can't be any out-of-flows or popups that need to be transformed;
|
|
// all out-of-flow descendants of the transformed element must also be
|
|
// descendants of the transformed frame.
|
|
SyncViewsAndInvalidateDescendants(aFrame,
|
|
nsChangeHint(aChange & (nsChangeHint_RepaintFrame |
|
|
nsChangeHint_SyncFrameView |
|
|
nsChangeHint_UpdateOpacityLayer |
|
|
nsChangeHint_SchedulePaint)));
|
|
// This must be set to true if the rendering change needs to
|
|
// invalidate content. If it's false, a composite-only paint
|
|
// (empty transaction) will be scheduled.
|
|
bool needInvalidatingPaint = false;
|
|
|
|
// if frame has view, will already be invalidated
|
|
if (aChange & nsChangeHint_RepaintFrame) {
|
|
// Note that this whole block will be skipped when painting is suppressed
|
|
// (due to our caller ApplyRendingChangeToTree() discarding the
|
|
// nsChangeHint_RepaintFrame hint). If you add handling for any other
|
|
// hints within this block, be sure that they too should be ignored when
|
|
// painting is suppressed.
|
|
needInvalidatingPaint = true;
|
|
aFrame->InvalidateFrameSubtree();
|
|
if ((aChange & nsChangeHint_UpdateEffects) &&
|
|
aFrame->IsFrameOfType(nsIFrame::eSVG) &&
|
|
!(aFrame->GetStateBits() & NS_STATE_IS_OUTER_SVG)) {
|
|
// Need to update our overflow rects:
|
|
nsSVGUtils::ScheduleReflowSVG(aFrame);
|
|
}
|
|
}
|
|
if (aChange & nsChangeHint_UpdateTextPath) {
|
|
if (aFrame->IsSVGText()) {
|
|
// Invalidate and reflow the entire SVGTextFrame:
|
|
NS_ASSERTION(aFrame->GetContent()->IsSVGElement(nsGkAtoms::textPath),
|
|
"expected frame for a <textPath> element");
|
|
nsIFrame* text =
|
|
nsLayoutUtils::GetClosestFrameOfType(aFrame, nsGkAtoms::svgTextFrame);
|
|
NS_ASSERTION(text, "expected to find an ancestor SVGTextFrame");
|
|
static_cast<SVGTextFrame*>(text)->NotifyGlyphMetricsChange();
|
|
} else {
|
|
MOZ_ASSERT(false, "unexpected frame got nsChangeHint_UpdateTextPath");
|
|
}
|
|
}
|
|
if (aChange & nsChangeHint_UpdateOpacityLayer) {
|
|
// FIXME/bug 796697: we can get away with empty transactions for
|
|
// opacity updates in many cases.
|
|
needInvalidatingPaint = true;
|
|
|
|
ActiveLayerTracker::NotifyRestyle(aFrame, eCSSProperty_opacity);
|
|
if (nsSVGIntegrationUtils::UsingEffectsForFrame(aFrame)) {
|
|
// SVG effects paints the opacity without using
|
|
// nsDisplayOpacity. We need to invalidate manually.
|
|
aFrame->InvalidateFrameSubtree();
|
|
}
|
|
}
|
|
if ((aChange & nsChangeHint_UpdateTransformLayer) &&
|
|
aFrame->IsTransformed()) {
|
|
ActiveLayerTracker::NotifyRestyle(aFrame, eCSSProperty_transform);
|
|
// If we're not already going to do an invalidating paint, see
|
|
// if we can get away with only updating the transform on a
|
|
// layer for this frame, and not scheduling an invalidating
|
|
// paint.
|
|
if (!needInvalidatingPaint) {
|
|
Layer* layer;
|
|
needInvalidatingPaint |= !aFrame->TryUpdateTransformOnly(&layer);
|
|
|
|
if (!needInvalidatingPaint) {
|
|
// Since we're not going to paint, we need to resend animation
|
|
// data to the layer.
|
|
MOZ_ASSERT(layer, "this can't happen if there's no layer");
|
|
nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(
|
|
layer, nullptr, nullptr, aFrame, eCSSProperty_transform);
|
|
}
|
|
}
|
|
}
|
|
if (aChange & nsChangeHint_ChildrenOnlyTransform) {
|
|
needInvalidatingPaint = true;
|
|
nsIFrame* childFrame =
|
|
GetFrameForChildrenOnlyTransformHint(aFrame)->PrincipalChildList().FirstChild();
|
|
for ( ; childFrame; childFrame = childFrame->GetNextSibling()) {
|
|
ActiveLayerTracker::NotifyRestyle(childFrame, eCSSProperty_transform);
|
|
}
|
|
}
|
|
if (aChange & nsChangeHint_SchedulePaint) {
|
|
needInvalidatingPaint = true;
|
|
}
|
|
aFrame->SchedulePaint(needInvalidatingPaint
|
|
? nsIFrame::PAINT_DEFAULT
|
|
: nsIFrame::PAINT_COMPOSITE_ONLY);
|
|
}
|
|
}
|
|
|
|
static void
|
|
SyncViewsAndInvalidateDescendants(nsIFrame* aFrame, nsChangeHint aChange)
|
|
{
|
|
NS_PRECONDITION(gInApplyRenderingChangeToTree,
|
|
"should only be called within ApplyRenderingChangeToTree");
|
|
NS_ASSERTION(nsChangeHint_size_t(aChange) ==
|
|
(aChange & (nsChangeHint_RepaintFrame |
|
|
nsChangeHint_SyncFrameView |
|
|
nsChangeHint_UpdateOpacityLayer |
|
|
nsChangeHint_SchedulePaint)),
|
|
"Invalid change flag");
|
|
|
|
nsView* view = aFrame->GetView();
|
|
if (view) {
|
|
if (aChange & nsChangeHint_SyncFrameView) {
|
|
nsContainerFrame::SyncFrameViewProperties(aFrame->PresContext(), aFrame,
|
|
nullptr, view);
|
|
}
|
|
}
|
|
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
for (nsIFrame* child : lists.CurrentList()) {
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
// only do frames that don't have placeholders
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) {
|
|
// do the out-of-flow frame and its continuations
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
DoApplyRenderingChangeToTree(outOfFlowFrame, aChange);
|
|
} else if (lists.CurrentID() == nsIFrame::kPopupList) {
|
|
DoApplyRenderingChangeToTree(child, aChange);
|
|
} else { // regular frame
|
|
SyncViewsAndInvalidateDescendants(child, aChange);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
ApplyRenderingChangeToTree(nsIPresShell* aPresShell,
|
|
nsIFrame* aFrame,
|
|
nsChangeHint aChange)
|
|
{
|
|
// We check StyleDisplay()->HasTransformStyle() in addition to checking
|
|
// IsTransformed() since we can get here for some frames that don't support
|
|
// CSS transforms.
|
|
NS_ASSERTION(!(aChange & nsChangeHint_UpdateTransformLayer) ||
|
|
aFrame->IsTransformed() ||
|
|
aFrame->StyleDisplay()->HasTransformStyle(),
|
|
"Unexpected UpdateTransformLayer hint");
|
|
|
|
if (aPresShell->IsPaintingSuppressed()) {
|
|
// Don't allow synchronous rendering changes when painting is turned off.
|
|
aChange &= ~nsChangeHint_RepaintFrame;
|
|
if (!aChange) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Trigger rendering updates by damaging this frame and any
|
|
// continuations of this frame.
|
|
#ifdef DEBUG
|
|
gInApplyRenderingChangeToTree = true;
|
|
#endif
|
|
if (aChange & nsChangeHint_RepaintFrame) {
|
|
// If the frame's background is propagated to an ancestor, walk up to
|
|
// that ancestor and apply the RepaintFrame change hint to it.
|
|
nsStyleContext* bgSC;
|
|
nsIFrame* propagatedFrame = aFrame;
|
|
while (!nsCSSRendering::FindBackground(propagatedFrame, &bgSC)) {
|
|
propagatedFrame = propagatedFrame->GetParent();
|
|
NS_ASSERTION(aFrame, "root frame must paint");
|
|
}
|
|
|
|
if (propagatedFrame != aFrame) {
|
|
DoApplyRenderingChangeToTree(propagatedFrame, nsChangeHint_RepaintFrame);
|
|
aChange &= ~nsChangeHint_RepaintFrame;
|
|
if (!aChange) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
DoApplyRenderingChangeToTree(aFrame, aChange);
|
|
#ifdef DEBUG
|
|
gInApplyRenderingChangeToTree = false;
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
AddSubtreeToOverflowTracker(nsIFrame* aFrame,
|
|
OverflowChangedTracker& aOverflowChangedTracker)
|
|
{
|
|
if (aFrame->FrameMaintainsOverflow()) {
|
|
aOverflowChangedTracker.AddFrame(aFrame,
|
|
OverflowChangedTracker::CHILDREN_CHANGED);
|
|
}
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
for (nsIFrame* child : lists.CurrentList()) {
|
|
AddSubtreeToOverflowTracker(child, aOverflowChangedTracker);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
StyleChangeReflow(nsIFrame* aFrame, nsChangeHint aHint)
|
|
{
|
|
nsIPresShell::IntrinsicDirty dirtyType;
|
|
if (aHint & nsChangeHint_ClearDescendantIntrinsics) {
|
|
NS_ASSERTION(aHint & nsChangeHint_ClearAncestorIntrinsics,
|
|
"Please read the comments in nsChangeHint.h");
|
|
NS_ASSERTION(aHint & nsChangeHint_NeedDirtyReflow,
|
|
"ClearDescendantIntrinsics requires NeedDirtyReflow");
|
|
dirtyType = nsIPresShell::eStyleChange;
|
|
} else if ((aHint & nsChangeHint_UpdateComputedBSize) &&
|
|
aFrame->HasAnyStateBits(
|
|
NS_FRAME_DESCENDANT_INTRINSIC_ISIZE_DEPENDS_ON_BSIZE)) {
|
|
dirtyType = nsIPresShell::eStyleChange;
|
|
} else if (aHint & nsChangeHint_ClearAncestorIntrinsics) {
|
|
dirtyType = nsIPresShell::eTreeChange;
|
|
} else if ((aHint & nsChangeHint_UpdateComputedBSize) &&
|
|
HasBoxAncestor(aFrame)) {
|
|
// The frame's computed BSize is changing, and we have a box ancestor
|
|
// whose cached intrinsic height may need to be updated.
|
|
dirtyType = nsIPresShell::eTreeChange;
|
|
} else {
|
|
dirtyType = nsIPresShell::eResize;
|
|
}
|
|
|
|
nsFrameState dirtyBits;
|
|
if (aFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) {
|
|
dirtyBits = nsFrameState(0);
|
|
} else if ((aHint & nsChangeHint_NeedDirtyReflow) ||
|
|
dirtyType == nsIPresShell::eStyleChange) {
|
|
dirtyBits = NS_FRAME_IS_DIRTY;
|
|
} else {
|
|
dirtyBits = NS_FRAME_HAS_DIRTY_CHILDREN;
|
|
}
|
|
|
|
// If we're not going to clear any intrinsic sizes on the frames, and
|
|
// there are no dirty bits to set, then there's nothing to do.
|
|
if (dirtyType == nsIPresShell::eResize && !dirtyBits)
|
|
return;
|
|
|
|
nsIPresShell::ReflowRootHandling rootHandling;
|
|
if (aHint & nsChangeHint_ReflowChangesSizeOrPosition) {
|
|
rootHandling = nsIPresShell::ePositionOrSizeChange;
|
|
} else {
|
|
rootHandling = nsIPresShell::eNoPositionOrSizeChange;
|
|
}
|
|
|
|
do {
|
|
aFrame->PresContext()->PresShell()->FrameNeedsReflow(
|
|
aFrame, dirtyType, dirtyBits, rootHandling);
|
|
aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame);
|
|
} while (aFrame);
|
|
}
|
|
|
|
/* static */ nsIFrame*
|
|
RestyleManagerBase::GetNextContinuationWithSameStyle(
|
|
nsIFrame* aFrame, nsStyleContext* aOldStyleContext,
|
|
bool* aHaveMoreContinuations)
|
|
{
|
|
// See GetPrevContinuationWithSameStyle about {ib} splits.
|
|
|
|
nsIFrame* nextContinuation = aFrame->GetNextContinuation();
|
|
if (!nextContinuation &&
|
|
(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT)) {
|
|
// We're the last continuation, so we have to hop back to the first
|
|
// before getting the frame property
|
|
nextContinuation =
|
|
aFrame->FirstContinuation()->GetProperty(nsIFrame::IBSplitSibling());
|
|
if (nextContinuation) {
|
|
nextContinuation =
|
|
nextContinuation->GetProperty(nsIFrame::IBSplitSibling());
|
|
}
|
|
}
|
|
|
|
if (!nextContinuation) {
|
|
return nullptr;
|
|
}
|
|
|
|
NS_ASSERTION(nextContinuation->GetContent() == aFrame->GetContent(),
|
|
"unexpected content mismatch");
|
|
|
|
nsStyleContext* nextStyle = nextContinuation->StyleContext();
|
|
if (nextStyle != aOldStyleContext) {
|
|
NS_ASSERTION(aOldStyleContext->GetPseudo() != nextStyle->GetPseudo() ||
|
|
aOldStyleContext->GetParent() != nextStyle->GetParent(),
|
|
"continuations should have the same style context");
|
|
nextContinuation = nullptr;
|
|
if (aHaveMoreContinuations) {
|
|
*aHaveMoreContinuations = true;
|
|
}
|
|
}
|
|
return nextContinuation;
|
|
}
|
|
|
|
nsresult
|
|
RestyleManagerBase::ProcessRestyledFrames(nsStyleChangeList& aChangeList)
|
|
{
|
|
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
|
|
"Someone forgot a script blocker");
|
|
|
|
// See bug 1378219 comment 9:
|
|
// Recursive calls here are a bit worrying, but apparently do happen in the
|
|
// wild (although not currently in any of our automated tests). Try to get a
|
|
// stack from Nightly/Dev channel to figure out what's going on and whether
|
|
// it's OK.
|
|
MOZ_DIAGNOSTIC_ASSERT(!mDestroyedFrames, "ProcessRestyledFrames recursion");
|
|
|
|
if (aChangeList.IsEmpty())
|
|
return NS_OK;
|
|
|
|
// If mDestroyedFrames is null, we want to create a new hashtable here
|
|
// and destroy it on exit; but if it is already non-null (because we're in
|
|
// a recursive call), we will continue to use the existing table to
|
|
// accumulate destroyed frames, and NOT clear mDestroyedFrames on exit.
|
|
// We use a MaybeClearDestroyedFrames helper to conditionally reset the
|
|
// mDestroyedFrames pointer when this method returns.
|
|
typedef decltype(mDestroyedFrames) DestroyedFramesT;
|
|
class MOZ_RAII MaybeClearDestroyedFrames
|
|
{
|
|
private:
|
|
DestroyedFramesT& mDestroyedFramesRef; // ref to caller's mDestroyedFrames
|
|
const bool mResetOnDestruction;
|
|
public:
|
|
explicit MaybeClearDestroyedFrames(DestroyedFramesT& aTarget)
|
|
: mDestroyedFramesRef(aTarget)
|
|
, mResetOnDestruction(!aTarget) // reset only if target starts out null
|
|
{
|
|
}
|
|
~MaybeClearDestroyedFrames()
|
|
{
|
|
if (mResetOnDestruction) {
|
|
mDestroyedFramesRef.reset(nullptr);
|
|
}
|
|
}
|
|
};
|
|
|
|
MaybeClearDestroyedFrames maybeClear(mDestroyedFrames);
|
|
if (!mDestroyedFrames) {
|
|
mDestroyedFrames = MakeUnique<nsTHashtable<nsPtrHashKey<const nsIFrame>>>();
|
|
}
|
|
|
|
PROFILER_LABEL("RestyleManager", "ProcessRestyledFrames",
|
|
js::ProfileEntry::Category::CSS);
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
nsCSSFrameConstructor* frameConstructor = presContext->FrameConstructor();
|
|
|
|
// Handle nsChangeHint_ScrollbarChange, by either updating the
|
|
// scrollbars on the viewport, or upgrading the change hint to frame-reconstruct.
|
|
for (nsStyleChangeData& data : aChangeList) {
|
|
if (data.mHint & nsChangeHint_ScrollbarChange) {
|
|
data.mHint &= ~nsChangeHint_ScrollbarChange;
|
|
bool doReconstruct = true; // assume the worst
|
|
|
|
// Only bother with this if we're html/body, since:
|
|
// (a) It'd be *expensive* to reframe these particular nodes. They're
|
|
// at the root, so reframing would mean rebuilding the world.
|
|
// (b) It's often *unnecessary* to reframe for "overflow" changes on
|
|
// these particular nodes. In general, the only reason we reframe
|
|
// for "overflow" changes is so we can construct (or destroy) a
|
|
// scrollframe & scrollbars -- and the html/body nodes often don't
|
|
// need their own scrollframe/scrollbars because they coopt the ones
|
|
// on the viewport (which always exist). So depending on whether
|
|
// that's happening, we can skip the reframe for these nodes.
|
|
if (data.mContent->IsAnyOfHTMLElements(nsGkAtoms::body,
|
|
nsGkAtoms::html)) {
|
|
// If the restyled element provided/provides the scrollbar styles for
|
|
// the viewport before and/or after this restyle, AND it's not coopting
|
|
// that responsibility from some other element (which would need
|
|
// reconstruction to make its own scrollframe now), THEN: we don't need
|
|
// to reconstruct - we can just reflow, because no scrollframe is being
|
|
// added/removed.
|
|
nsIContent* prevOverrideNode =
|
|
presContext->GetViewportScrollStylesOverrideNode();
|
|
nsIContent* newOverrideNode =
|
|
presContext->UpdateViewportScrollStylesOverride();
|
|
|
|
if (data.mContent == prevOverrideNode ||
|
|
data.mContent == newOverrideNode) {
|
|
// If we get here, the restyled element provided the scrollbar styles
|
|
// for viewport before this restyle, OR it will provide them after.
|
|
if (!prevOverrideNode || !newOverrideNode ||
|
|
prevOverrideNode == newOverrideNode) {
|
|
// If we get here, the restyled element is NOT replacing (or being
|
|
// replaced by) some other element as the viewport's
|
|
// scrollbar-styles provider. (If it were, we'd potentially need to
|
|
// reframe to create a dedicated scrollframe for whichever element
|
|
// is being booted from providing viewport scrollbar styles.)
|
|
//
|
|
// Under these conditions, we're OK to assume that this "overflow"
|
|
// change only impacts the root viewport's scrollframe, which
|
|
// already exists, so we can simply reflow instead of reframing.
|
|
// When requesting this reflow, we send the exact same change hints
|
|
// that "width" and "height" would send (since conceptually,
|
|
// adding/removing scrollbars is like changing the available
|
|
// space).
|
|
data.mHint |= (nsChangeHint_ReflowHintsForISizeChange |
|
|
nsChangeHint_ReflowHintsForBSizeChange);
|
|
doReconstruct = false;
|
|
}
|
|
}
|
|
}
|
|
if (doReconstruct) {
|
|
data.mHint |= nsChangeHint_ReconstructFrame;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Make sure to not rebuild quote or counter lists while we're
|
|
// processing restyles
|
|
frameConstructor->BeginUpdate();
|
|
|
|
bool didUpdateCursor = false;
|
|
|
|
for (const nsStyleChangeData& data : aChangeList) {
|
|
nsIFrame* frame = data.mFrame;
|
|
nsIContent* content = data.mContent;
|
|
nsChangeHint hint = data.mHint;
|
|
bool didReflowThisFrame = false;
|
|
|
|
NS_ASSERTION(!(hint & nsChangeHint_AllReflowHints) ||
|
|
(hint & nsChangeHint_NeedReflow),
|
|
"Reflow hint bits set without actually asking for a reflow");
|
|
|
|
// skip any frame that has been destroyed due to a ripple effect
|
|
if (frame && mDestroyedFrames->Contains(frame)) {
|
|
continue;
|
|
}
|
|
|
|
if (frame && frame->GetContent() != content) {
|
|
// XXXbz this is due to image maps messing with the primary frame of
|
|
// <area>s. See bug 135040. Remove this block once that's fixed.
|
|
frame = nullptr;
|
|
if (!(hint & nsChangeHint_ReconstructFrame)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if ((hint & nsChangeHint_UpdateContainingBlock) && frame &&
|
|
!(hint & nsChangeHint_ReconstructFrame)) {
|
|
if (NeedToReframeForAddingOrRemovingTransform(frame) ||
|
|
frame->GetType() == nsGkAtoms::fieldSetFrame ||
|
|
frame->GetContentInsertionFrame() != frame) {
|
|
// The frame has positioned children that need to be reparented, or
|
|
// it can't easily be converted to/from being an abs-pos container correctly.
|
|
hint |= nsChangeHint_ReconstructFrame;
|
|
} else {
|
|
for (nsIFrame* cont = frame; cont;
|
|
cont = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
// Normally frame construction would set state bits as needed,
|
|
// but we're not going to reconstruct the frame so we need to set them.
|
|
// It's because we need to set this state on each affected frame
|
|
// that we can't coalesce nsChangeHint_UpdateContainingBlock hints up
|
|
// to ancestors (i.e. it can't be an change hint that is handled for
|
|
// descendants).
|
|
if (cont->IsAbsPosContainingBlock()) {
|
|
if (!cont->IsAbsoluteContainer() &&
|
|
(cont->GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN)) {
|
|
cont->MarkAsAbsoluteContainingBlock();
|
|
}
|
|
} else {
|
|
if (cont->IsAbsoluteContainer()) {
|
|
if (cont->HasAbsolutelyPositionedChildren()) {
|
|
// If |cont| still has absolutely positioned children,
|
|
// we can't call MarkAsNotAbsoluteContainingBlock. This
|
|
// will remove a frame list that still has children in
|
|
// it that we need to keep track of.
|
|
// The optimization of removing it isn't particularly
|
|
// important, although it does mean we skip some tests.
|
|
NS_WARNING("skipping removal of absolute containing block");
|
|
} else {
|
|
cont->MarkAsNotAbsoluteContainingBlock();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((hint & nsChangeHint_AddOrRemoveTransform) && frame &&
|
|
!(hint & nsChangeHint_ReconstructFrame)) {
|
|
for (nsIFrame* cont = frame; cont;
|
|
cont = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
if (cont->StyleDisplay()->HasTransform(cont)) {
|
|
cont->AddStateBits(NS_FRAME_MAY_BE_TRANSFORMED);
|
|
}
|
|
// Don't remove NS_FRAME_MAY_BE_TRANSFORMED since it may still be
|
|
// transformed by other means. It's OK to have the bit even if it's
|
|
// not needed.
|
|
}
|
|
}
|
|
|
|
if (hint & nsChangeHint_ReconstructFrame) {
|
|
// If we ever start passing true here, be careful of restyles
|
|
// that involve a reframe and animations. In particular, if the
|
|
// restyle we're processing here is an animation restyle, but
|
|
// the style resolution we will do for the frame construction
|
|
// happens async when we're not in an animation restyle already,
|
|
// problems could arise.
|
|
// We could also have problems with triggering of CSS transitions
|
|
// on elements whose frames are reconstructed, since we depend on
|
|
// the reconstruction happening synchronously.
|
|
frameConstructor->RecreateFramesForContent(
|
|
content,
|
|
nsCSSFrameConstructor::InsertionKind::Sync,
|
|
nsCSSFrameConstructor::REMOVE_FOR_RECONSTRUCTION);
|
|
} else {
|
|
NS_ASSERTION(frame, "This shouldn't happen");
|
|
|
|
if (!frame->FrameMaintainsOverflow()) {
|
|
// frame does not maintain overflow rects, so avoid calling
|
|
// FinishAndStoreOverflow on it:
|
|
hint &= ~(nsChangeHint_UpdateOverflow |
|
|
nsChangeHint_ChildrenOnlyTransform |
|
|
nsChangeHint_UpdatePostTransformOverflow |
|
|
nsChangeHint_UpdateParentOverflow);
|
|
}
|
|
|
|
if (!(frame->GetStateBits() & NS_FRAME_MAY_BE_TRANSFORMED)) {
|
|
// Frame can not be transformed, and thus a change in transform will
|
|
// have no effect and we should not use the
|
|
// nsChangeHint_UpdatePostTransformOverflow hint.
|
|
hint &= ~nsChangeHint_UpdatePostTransformOverflow;
|
|
}
|
|
|
|
if (hint & nsChangeHint_UpdateEffects) {
|
|
for (nsIFrame* cont = frame; cont;
|
|
cont = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
nsSVGEffects::UpdateEffects(cont);
|
|
}
|
|
}
|
|
if ((hint & nsChangeHint_InvalidateRenderingObservers) ||
|
|
((hint & nsChangeHint_UpdateOpacityLayer) &&
|
|
frame->IsFrameOfType(nsIFrame::eSVG) &&
|
|
!(frame->GetStateBits() & NS_STATE_IS_OUTER_SVG))) {
|
|
nsSVGEffects::InvalidateRenderingObservers(frame);
|
|
}
|
|
if (hint & nsChangeHint_NeedReflow) {
|
|
StyleChangeReflow(frame, hint);
|
|
didReflowThisFrame = true;
|
|
}
|
|
|
|
if ((hint & nsChangeHint_UpdateUsesOpacity) &&
|
|
frame->IsFrameOfType(nsIFrame::eTablePart)) {
|
|
NS_ASSERTION(hint & nsChangeHint_UpdateOpacityLayer,
|
|
"should only return UpdateUsesOpacity hint "
|
|
"when also returning UpdateOpacityLayer hint");
|
|
// When an internal table part (including cells) changes between
|
|
// having opacity 1 and non-1, it changes whether its
|
|
// backgrounds (and those of table parts inside of it) are
|
|
// painted as part of the table's nsDisplayTableBorderBackground
|
|
// display item, or part of its own display item. That requires
|
|
// invalidation, so change UpdateOpacityLayer to RepaintFrame.
|
|
hint &= ~nsChangeHint_UpdateOpacityLayer;
|
|
hint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
|
|
// Opacity disables preserve-3d, so if we toggle it, then we also need
|
|
// to update the overflow areas of all potentially affected frames.
|
|
if ((hint & nsChangeHint_UpdateUsesOpacity) &&
|
|
frame->StyleDisplay()->mTransformStyle == NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D) {
|
|
hint |= nsChangeHint_UpdateSubtreeOverflow;
|
|
}
|
|
|
|
if (hint & nsChangeHint_UpdateBackgroundPosition) {
|
|
// For most frame types, DLBI can detect background position changes,
|
|
// so we only need to schedule a paint.
|
|
hint |= nsChangeHint_SchedulePaint;
|
|
if (frame->IsFrameOfType(nsIFrame::eTablePart) ||
|
|
frame->IsFrameOfType(nsIFrame::eMathML)) {
|
|
// Table parts and MathML frames don't build display items for their
|
|
// backgrounds, so DLBI can't detect background-position changes for
|
|
// these frames. Repaint the whole frame.
|
|
hint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
}
|
|
|
|
if (hint & (nsChangeHint_RepaintFrame | nsChangeHint_SyncFrameView |
|
|
nsChangeHint_UpdateOpacityLayer | nsChangeHint_UpdateTransformLayer |
|
|
nsChangeHint_ChildrenOnlyTransform | nsChangeHint_SchedulePaint)) {
|
|
ApplyRenderingChangeToTree(presContext->PresShell(), frame, hint);
|
|
}
|
|
if ((hint & nsChangeHint_RecomputePosition) && !didReflowThisFrame) {
|
|
ActiveLayerTracker::NotifyOffsetRestyle(frame);
|
|
// It is possible for this to fall back to a reflow
|
|
if (!RecomputePosition(frame)) {
|
|
didReflowThisFrame = true;
|
|
}
|
|
}
|
|
NS_ASSERTION(!(hint & nsChangeHint_ChildrenOnlyTransform) ||
|
|
(hint & nsChangeHint_UpdateOverflow),
|
|
"nsChangeHint_UpdateOverflow should be passed too");
|
|
if (!didReflowThisFrame &&
|
|
(hint & (nsChangeHint_UpdateOverflow |
|
|
nsChangeHint_UpdatePostTransformOverflow |
|
|
nsChangeHint_UpdateParentOverflow |
|
|
nsChangeHint_UpdateSubtreeOverflow))) {
|
|
if (hint & nsChangeHint_UpdateSubtreeOverflow) {
|
|
for (nsIFrame* cont = frame; cont; cont =
|
|
nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
AddSubtreeToOverflowTracker(cont, mOverflowChangedTracker);
|
|
}
|
|
// The work we just did in AddSubtreeToOverflowTracker
|
|
// subsumes some of the other hints:
|
|
hint &= ~(nsChangeHint_UpdateOverflow |
|
|
nsChangeHint_UpdatePostTransformOverflow);
|
|
}
|
|
if (hint & nsChangeHint_ChildrenOnlyTransform) {
|
|
// The overflow areas of the child frames need to be updated:
|
|
nsIFrame* hintFrame = GetFrameForChildrenOnlyTransformHint(frame);
|
|
nsIFrame* childFrame = hintFrame->PrincipalChildList().FirstChild();
|
|
NS_ASSERTION(!nsLayoutUtils::GetNextContinuationOrIBSplitSibling(frame),
|
|
"SVG frames should not have continuations "
|
|
"or ib-split siblings");
|
|
NS_ASSERTION(!nsLayoutUtils::GetNextContinuationOrIBSplitSibling(hintFrame),
|
|
"SVG frames should not have continuations "
|
|
"or ib-split siblings");
|
|
for ( ; childFrame; childFrame = childFrame->GetNextSibling()) {
|
|
MOZ_ASSERT(childFrame->IsFrameOfType(nsIFrame::eSVG),
|
|
"Not expecting non-SVG children");
|
|
// If |childFrame| is dirty or has dirty children, we don't bother
|
|
// updating overflows since that will happen when it's reflowed.
|
|
if (!(childFrame->GetStateBits() &
|
|
(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN))) {
|
|
mOverflowChangedTracker.AddFrame(childFrame,
|
|
OverflowChangedTracker::CHILDREN_CHANGED);
|
|
}
|
|
NS_ASSERTION(!nsLayoutUtils::GetNextContinuationOrIBSplitSibling(childFrame),
|
|
"SVG frames should not have continuations "
|
|
"or ib-split siblings");
|
|
NS_ASSERTION(childFrame->GetParent() == hintFrame,
|
|
"SVG child frame not expected to have different parent");
|
|
}
|
|
}
|
|
// If |frame| is dirty or has dirty children, we don't bother updating
|
|
// overflows since that will happen when it's reflowed.
|
|
if (!(frame->GetStateBits() &
|
|
(NS_FRAME_IS_DIRTY | NS_FRAME_HAS_DIRTY_CHILDREN))) {
|
|
if (hint & (nsChangeHint_UpdateOverflow |
|
|
nsChangeHint_UpdatePostTransformOverflow)) {
|
|
OverflowChangedTracker::ChangeKind changeKind;
|
|
// If we have both nsChangeHint_UpdateOverflow and
|
|
// nsChangeHint_UpdatePostTransformOverflow,
|
|
// CHILDREN_CHANGED is selected as it is
|
|
// strictly stronger.
|
|
if (hint & nsChangeHint_UpdateOverflow) {
|
|
changeKind = OverflowChangedTracker::CHILDREN_CHANGED;
|
|
} else {
|
|
changeKind = OverflowChangedTracker::TRANSFORM_CHANGED;
|
|
}
|
|
for (nsIFrame* cont = frame; cont; cont =
|
|
nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
mOverflowChangedTracker.AddFrame(cont, changeKind);
|
|
}
|
|
}
|
|
// UpdateParentOverflow hints need to be processed in addition
|
|
// to the above, since if the processing of the above hints
|
|
// yields no change, the update will not propagate to the
|
|
// parent.
|
|
if (hint & nsChangeHint_UpdateParentOverflow) {
|
|
MOZ_ASSERT(frame->GetParent(),
|
|
"shouldn't get style hints for the root frame");
|
|
for (nsIFrame* cont = frame; cont; cont =
|
|
nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
mOverflowChangedTracker.AddFrame(cont->GetParent(),
|
|
OverflowChangedTracker::CHILDREN_CHANGED);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ((hint & nsChangeHint_UpdateCursor) && !didUpdateCursor) {
|
|
presContext->PresShell()->SynthesizeMouseMove(false);
|
|
didUpdateCursor = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
frameConstructor->EndUpdate();
|
|
|
|
#ifdef DEBUG
|
|
// Verify the style tree. Note that this needs to happen once we've
|
|
// processed the whole list, since until then the tree is not in fact in a
|
|
// consistent state.
|
|
for (const nsStyleChangeData& data : aChangeList) {
|
|
// reget frame from content since it may have been regenerated...
|
|
if (data.mContent) {
|
|
nsIFrame* frame = data.mContent->GetPrimaryFrame();
|
|
if (frame) {
|
|
DebugVerifyStyleTree(frame);
|
|
}
|
|
} else if (!data.mFrame ||
|
|
data.mFrame->GetType() != nsGkAtoms::viewportFrame) {
|
|
NS_WARNING("Unable to test style tree integrity -- no content node "
|
|
"(and not a viewport frame)");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
aChangeList.Clear();
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace mozilla
|