зеркало из https://github.com/mozilla/gecko-dev.git
3556 строки
134 KiB
C++
3556 строки
134 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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/RestyleManager.h"
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#include "mozilla/AutoRestyleTimelineMarker.h"
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#include "mozilla/AutoTimelineMarker.h"
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#include "mozilla/ComputedStyle.h"
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#include "mozilla/ComputedStyleInlines.h"
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#include "mozilla/DocumentStyleRootIterator.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/ServoStyleSetInlines.h"
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#include "mozilla/Unused.h"
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#include "mozilla/ViewportFrame.h"
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#include "mozilla/dom/ChildIterator.h"
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#include "mozilla/dom/ElementInlines.h"
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#include "Layers.h"
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#include "LayerAnimationInfo.h" // For LayerAnimationInfo::sRecords
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#include "nsAnimationManager.h"
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#include "nsBlockFrame.h"
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#include "nsBulletFrame.h"
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#include "nsContentUtils.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"
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#include "nsImageFrame.h"
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#include "nsIPresShellInlines.h"
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#include "nsPlaceholderFrame.h"
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#include "nsPrintfCString.h"
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#include "nsRefreshDriver.h"
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#include "nsStyleChangeList.h"
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#include "nsStyleUtil.h"
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#include "nsTransitionManager.h"
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#include "StickyScrollContainer.h"
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#include "mozilla/EffectSet.h"
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#include "mozilla/IntegerRange.h"
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#include "mozilla/ViewportFrame.h"
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#include "SVGObserverUtils.h"
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#include "SVGTextFrame.h"
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#include "ActiveLayerTracker.h"
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#include "nsSVGIntegrationUtils.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.h"
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#endif
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using namespace mozilla::dom;
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namespace mozilla {
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RestyleManager::RestyleManager(nsPresContext* aPresContext)
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: mPresContext(aPresContext)
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, mRestyleGeneration(1)
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, mUndisplayedRestyleGeneration(1)
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, mInStyleRefresh(false)
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, mAnimationGeneration(0)
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{
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MOZ_ASSERT(mPresContext);
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}
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void
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RestyleManager::ContentInserted(nsIContent* aChild)
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{
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MOZ_ASSERT(aChild->GetParentNode());
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RestyleForInsertOrChange(aChild);
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}
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void
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RestyleManager::ContentAppended(nsIContent* aFirstNewContent)
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{
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MOZ_ASSERT(aFirstNewContent->GetParent());
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// The container cannot be a document, but might be a ShadowRoot.
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if (!aFirstNewContent->GetParentNode()->IsElement()) {
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return;
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}
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Element* container = aFirstNewContent->GetParentNode()->AsElement();
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#ifdef DEBUG
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{
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for (nsIContent* cur = aFirstNewContent; cur; cur = cur->GetNextSibling()) {
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NS_ASSERTION(!cur->IsRootOfAnonymousSubtree(),
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"anonymous nodes should not be in child lists");
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}
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}
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#endif
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uint32_t selectorFlags =
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container->GetFlags() & (NODE_ALL_SELECTOR_FLAGS &
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~NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS);
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if (selectorFlags == 0)
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return;
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if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
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// see whether we need to restyle the container
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bool wasEmpty = true; // :empty or :-moz-only-whitespace
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for (nsIContent* cur = container->GetFirstChild();
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cur != aFirstNewContent;
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cur = cur->GetNextSibling()) {
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// We don't know whether we're testing :empty or :-moz-only-whitespace,
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// so be conservative and assume :-moz-only-whitespace (i.e., make
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// IsSignificantChild less likely to be true, and thus make us more
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// likely to restyle).
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if (nsStyleUtil::IsSignificantChild(cur, false)) {
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wasEmpty = false;
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break;
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}
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}
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if (wasEmpty) {
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RestyleForEmptyChange(container);
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return;
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}
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}
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if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
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PostRestyleEvent(container, eRestyle_Subtree, nsChangeHint(0));
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// Restyling the container is the most we can do here, so we're done.
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return;
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}
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if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
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// restyle the last element child before this node
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for (nsIContent* cur = aFirstNewContent->GetPreviousSibling();
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cur;
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cur = cur->GetPreviousSibling()) {
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if (cur->IsElement()) {
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PostRestyleEvent(cur->AsElement(), eRestyle_Subtree, nsChangeHint(0));
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break;
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}
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}
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}
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}
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void
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RestyleManager::RestyleForEmptyChange(Element* aContainer)
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{
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// In some cases (:empty + E, :empty ~ E), a change in the content of
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// an element requires restyling its parent's siblings.
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nsRestyleHint hint = eRestyle_Subtree;
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nsIContent* grandparent = aContainer->GetParent();
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if (grandparent &&
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(grandparent->GetFlags() & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS)) {
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hint = nsRestyleHint(hint | eRestyle_LaterSiblings);
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}
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PostRestyleEvent(aContainer, hint, nsChangeHint(0));
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}
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void
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RestyleManager::MaybeRestyleForEdgeChildChange(Element* aContainer,
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nsIContent* aChangedChild)
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{
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MOZ_ASSERT(aContainer->GetFlags() & NODE_HAS_EDGE_CHILD_SELECTOR);
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MOZ_ASSERT(aChangedChild->GetParent() == aContainer);
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// restyle the previously-first element child if it is after this node
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bool passedChild = false;
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for (nsIContent* content = aContainer->GetFirstChild();
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content;
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content = content->GetNextSibling()) {
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if (content == aChangedChild) {
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passedChild = true;
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continue;
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}
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if (content->IsElement()) {
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if (passedChild) {
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PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
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nsChangeHint(0));
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}
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break;
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}
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}
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// restyle the previously-last element child if it is before this node
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passedChild = false;
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for (nsIContent* content = aContainer->GetLastChild();
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content;
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content = content->GetPreviousSibling()) {
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if (content == aChangedChild) {
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passedChild = true;
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continue;
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}
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if (content->IsElement()) {
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if (passedChild) {
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PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
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nsChangeHint(0));
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}
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break;
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}
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}
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}
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// Needed since we can't use PostRestyleEvent on non-elements (with
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// eRestyle_LaterSiblings or nsRestyleHint(eRestyle_Subtree |
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// eRestyle_LaterSiblings) as appropriate).
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static void
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RestyleSiblingsStartingWith(RestyleManager* aRestyleManager,
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nsIContent* aStartingSibling /* may be null */)
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{
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for (nsIContent* sibling = aStartingSibling; sibling;
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sibling = sibling->GetNextSibling()) {
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if (sibling->IsElement()) {
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aRestyleManager->
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PostRestyleEvent(sibling->AsElement(),
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nsRestyleHint(eRestyle_Subtree | eRestyle_LaterSiblings),
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nsChangeHint(0));
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break;
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}
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}
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}
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template<typename CharT>
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bool
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WhitespaceOnly(const CharT* aBuffer, size_t aUpTo)
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{
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for (auto index : IntegerRange(aUpTo)) {
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if (!dom::IsSpaceCharacter(aBuffer[index])) {
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return false;
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}
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}
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return true;
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}
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template<typename CharT>
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bool
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WhitespaceOnlyChangedOnAppend(const CharT* aBuffer,
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size_t aOldLength,
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size_t aNewLength)
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{
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MOZ_ASSERT(aOldLength <= aNewLength);
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if (!WhitespaceOnly(aBuffer, aOldLength)) {
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// The old text was already not whitespace-only.
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return false;
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}
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return !WhitespaceOnly(aBuffer + aOldLength, aNewLength - aOldLength);
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}
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static bool
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HasAnySignificantSibling(Element* aContainer, nsIContent* aChild)
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{
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MOZ_ASSERT(aChild->GetParent() == aContainer);
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for (nsIContent* child = aContainer->GetFirstChild();
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child;
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child = child->GetNextSibling()) {
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if (child == aChild) {
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continue;
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}
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// We don't know whether we're testing :empty or :-moz-only-whitespace,
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// so be conservative and assume :-moz-only-whitespace (i.e., make
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// IsSignificantChild less likely to be true, and thus make us more
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// likely to restyle).
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if (nsStyleUtil::IsSignificantChild(child, false)) {
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return true;
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}
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}
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return false;
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}
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void
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RestyleManager::CharacterDataChanged(nsIContent* aContent,
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const CharacterDataChangeInfo& aInfo)
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{
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nsINode* parent = aContent->GetParentNode();
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MOZ_ASSERT(parent, "How were we notified of a stray node?");
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uint32_t slowSelectorFlags = parent->GetFlags() & NODE_ALL_SELECTOR_FLAGS;
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if (!(slowSelectorFlags & (NODE_HAS_EMPTY_SELECTOR |
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NODE_HAS_EDGE_CHILD_SELECTOR))) {
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// Nothing to do, no other slow selector can change as a result of this.
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return;
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}
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if (!aContent->IsText()) {
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// Doesn't matter to styling (could be a processing instruction or a
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// comment), it can't change whether any selectors match or don't.
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return;
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}
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if (MOZ_UNLIKELY(!parent->IsElement())) {
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MOZ_ASSERT(parent->IsShadowRoot());
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return;
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}
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if (MOZ_UNLIKELY(aContent->IsRootOfAnonymousSubtree())) {
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// This is an anonymous node and thus isn't in child lists, so isn't taken
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// into account for selector matching the relevant selectors here.
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return;
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}
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// Handle appends specially since they're common and we can know both the old
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// and the new text exactly.
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//
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// TODO(emilio): This could be made much more general if :-moz-only-whitespace
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// / :-moz-first-node and :-moz-last-node didn't exist. In that case we only
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// need to know whether we went from empty to non-empty, and that's trivial to
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// know, with CharacterDataChangeInfo...
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if (!aInfo.mAppend) {
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// FIXME(emilio): This restyles unnecessarily if the text node is the only
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// child of the parent element. Fortunately, it's uncommon to have such
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// nodes and this not being an append.
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//
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// See the testcase in bug 1427625 for a test-case that triggers this.
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RestyleForInsertOrChange(aContent);
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return;
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}
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const nsTextFragment* text = aContent->GetText();
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const size_t oldLength = aInfo.mChangeStart;
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const size_t newLength = text->GetLength();
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const bool emptyChanged = !oldLength && newLength;
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const bool whitespaceOnlyChanged = text->Is2b()
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? WhitespaceOnlyChangedOnAppend(text->Get2b(), oldLength, newLength)
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: WhitespaceOnlyChangedOnAppend(text->Get1b(), oldLength, newLength);
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if (!emptyChanged && !whitespaceOnlyChanged) {
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return;
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}
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if (slowSelectorFlags & NODE_HAS_EMPTY_SELECTOR) {
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if (!HasAnySignificantSibling(parent->AsElement(), aContent)) {
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// We used to be empty, restyle the parent.
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RestyleForEmptyChange(parent->AsElement());
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return;
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}
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}
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if (slowSelectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
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MaybeRestyleForEdgeChildChange(parent->AsElement(), aContent);
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}
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}
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// Restyling for a ContentInserted or CharacterDataChanged notification.
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// This could be used for ContentRemoved as well if we got the
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// notification before the removal happened (and sometimes
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// CharacterDataChanged is more like a removal than an addition).
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// The comments are written and variables are named in terms of it being
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// a ContentInserted notification.
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void
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RestyleManager::RestyleForInsertOrChange(nsIContent* aChild)
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{
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nsINode* parentNode = aChild->GetParentNode();
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MOZ_ASSERT(parentNode);
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// The container might be a document or a ShadowRoot.
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if (!parentNode->IsElement()) {
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return;
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}
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Element* container = parentNode->AsElement();
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NS_ASSERTION(!aChild->IsRootOfAnonymousSubtree(),
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"anonymous nodes should not be in child lists");
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uint32_t selectorFlags = container->GetFlags() & NODE_ALL_SELECTOR_FLAGS;
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if (selectorFlags == 0)
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return;
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if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
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// See whether we need to restyle the container due to :empty /
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// :-moz-only-whitespace.
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const bool wasEmpty = !HasAnySignificantSibling(container, aChild);
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if (wasEmpty) {
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// FIXME(emilio): When coming from CharacterDataChanged this can restyle
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// unnecessarily. Also can restyle unnecessarily if aChild is not
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// significant anyway, though that's more unlikely.
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RestyleForEmptyChange(container);
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return;
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}
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}
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if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
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PostRestyleEvent(container, eRestyle_Subtree, nsChangeHint(0));
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// Restyling the container is the most we can do here, so we're done.
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return;
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}
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if (selectorFlags & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS) {
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// Restyle all later siblings.
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RestyleSiblingsStartingWith(this, aChild->GetNextSibling());
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}
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if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
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MaybeRestyleForEdgeChildChange(container, aChild);
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}
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}
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void
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RestyleManager::ContentRemoved(nsIContent* aOldChild,
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nsIContent* aFollowingSibling)
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{
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MOZ_ASSERT(aOldChild->GetParentNode());
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// Computed style data isn't useful for detached nodes, and we'll need to
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// recompute it anyway if we ever insert the nodes back into a document.
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if (aOldChild->IsElement()) {
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RestyleManager::ClearServoDataFromSubtree(aOldChild->AsElement());
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}
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// The container might be a document or a ShadowRoot.
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if (!aOldChild->GetParentNode()->IsElement()) {
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return;
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}
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Element* container = aOldChild->GetParentNode()->AsElement();
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if (aOldChild->IsRootOfAnonymousSubtree()) {
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// This should be an assert, but this is called incorrectly in
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// HTMLEditor::DeleteRefToAnonymousNode and the assertions were clogging
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// up the logs. Make it an assert again when that's fixed.
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MOZ_ASSERT(aOldChild->GetProperty(nsGkAtoms::restylableAnonymousNode),
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"anonymous nodes should not be in child lists (bug 439258)");
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}
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uint32_t selectorFlags = container->GetFlags() & NODE_ALL_SELECTOR_FLAGS;
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if (selectorFlags == 0)
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return;
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if (selectorFlags & NODE_HAS_EMPTY_SELECTOR) {
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// see whether we need to restyle the container
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bool isEmpty = true; // :empty or :-moz-only-whitespace
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for (nsIContent* child = container->GetFirstChild();
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child;
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child = child->GetNextSibling()) {
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// We don't know whether we're testing :empty or :-moz-only-whitespace,
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// so be conservative and assume :-moz-only-whitespace (i.e., make
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// IsSignificantChild less likely to be true, and thus make us more
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// likely to restyle).
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if (nsStyleUtil::IsSignificantChild(child, false)) {
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isEmpty = false;
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break;
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}
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}
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if (isEmpty) {
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RestyleForEmptyChange(container);
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return;
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}
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}
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if (selectorFlags & NODE_HAS_SLOW_SELECTOR) {
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PostRestyleEvent(container, eRestyle_Subtree, nsChangeHint(0));
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// Restyling the container is the most we can do here, so we're done.
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return;
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}
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if (selectorFlags & NODE_HAS_SLOW_SELECTOR_LATER_SIBLINGS) {
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// Restyle all later siblings.
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RestyleSiblingsStartingWith(this, aFollowingSibling);
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}
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if (selectorFlags & NODE_HAS_EDGE_CHILD_SELECTOR) {
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// restyle the now-first element child if it was after aOldChild
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bool reachedFollowingSibling = false;
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for (nsIContent* content = container->GetFirstChild();
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content;
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content = content->GetNextSibling()) {
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if (content == aFollowingSibling) {
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reachedFollowingSibling = true;
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// do NOT continue here; we might want to restyle this node
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}
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if (content->IsElement()) {
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if (reachedFollowingSibling) {
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PostRestyleEvent(content->AsElement(), eRestyle_Subtree,
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nsChangeHint(0));
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}
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break;
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}
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}
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// restyle the now-last element child if it was before aOldChild
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reachedFollowingSibling = (aFollowingSibling == nullptr);
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for (nsIContent* content = container->GetLastChild();
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content;
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content = content->GetPreviousSibling()) {
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if (content->IsElement()) {
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if (reachedFollowingSibling) {
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PostRestyleEvent(content->AsElement(), eRestyle_Subtree, nsChangeHint(0));
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}
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break;
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}
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if (content == aFollowingSibling) {
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reachedFollowingSibling = true;
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}
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}
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}
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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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RestyleManager::ContentStateChangedInternal(Element* aElement,
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EventStates aStateMask,
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nsChangeHint* aOutChangeHint)
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{
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MOZ_ASSERT(!mInStyleRefresh);
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MOZ_ASSERT(aOutChangeHint);
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|
*aOutChangeHint = nsChangeHint(0);
|
|
// Any change to a content state that affects which frames we construct
|
|
// must lead to a frame reconstruct here if we already have a frame.
|
|
// Note that we never decide through non-CSS means to not create frames
|
|
// based on content states, so if we already don't have a frame we don't
|
|
// need to force a reframe -- if it's needed, the HasStateDependentStyle
|
|
// call will handle things.
|
|
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
|
|
if (primaryFrame) {
|
|
// If it's generated content, ignore LOADING/etc state changes on it.
|
|
if (!primaryFrame->IsGeneratedContentFrame() &&
|
|
aStateMask.HasAtLeastOneOfStates(NS_EVENT_STATE_BROKEN |
|
|
NS_EVENT_STATE_USERDISABLED |
|
|
NS_EVENT_STATE_SUPPRESSED |
|
|
NS_EVENT_STATE_LOADING)) {
|
|
*aOutChangeHint = nsChangeHint_ReconstructFrame;
|
|
} else {
|
|
uint8_t app = primaryFrame->StyleDisplay()->mAppearance;
|
|
if (app) {
|
|
nsITheme* theme = PresContext()->GetTheme();
|
|
if (theme &&
|
|
theme->ThemeSupportsWidget(PresContext(), primaryFrame, app)) {
|
|
bool repaint = false;
|
|
theme->WidgetStateChanged(primaryFrame, app, nullptr, &repaint,
|
|
nullptr);
|
|
if (repaint) {
|
|
*aOutChangeHint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
primaryFrame->ContentStatesChanged(aStateMask);
|
|
}
|
|
|
|
if (aStateMask.HasState(NS_EVENT_STATE_VISITED)) {
|
|
// Exposing information to the page about whether the link is
|
|
// visited or not isn't really something we can worry about here.
|
|
// FIXME: We could probably do this a bit better.
|
|
*aOutChangeHint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
}
|
|
|
|
/* static */ nsCString
|
|
RestyleManager::RestyleHintToString(nsRestyleHint aHint)
|
|
{
|
|
nsCString result;
|
|
bool any = false;
|
|
const char* names[] = {
|
|
"Self", "SomeDescendants", "Subtree", "LaterSiblings", "CSSTransitions",
|
|
"CSSAnimations", "StyleAttribute", "StyleAttribute_Animations",
|
|
"Force", "ForceDescendants"
|
|
};
|
|
uint32_t hint = aHint & ((1 << ArrayLength(names)) - 1);
|
|
uint32_t rest = aHint & ~((1 << ArrayLength(names)) - 1);
|
|
for (uint32_t i = 0; i < ArrayLength(names); i++) {
|
|
if (hint & (1 << i)) {
|
|
if (any) {
|
|
result.AppendLiteral(" | ");
|
|
}
|
|
result.AppendPrintf("eRestyle_%s", names[i]);
|
|
any = true;
|
|
}
|
|
}
|
|
if (rest) {
|
|
if (any) {
|
|
result.AppendLiteral(" | ");
|
|
}
|
|
result.AppendPrintf("0x%0x", rest);
|
|
} else {
|
|
if (!any) {
|
|
result.AppendLiteral("0");
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* static */ nsCString
|
|
RestyleManager::ChangeHintToString(nsChangeHint aHint)
|
|
{
|
|
nsCString result;
|
|
bool any = false;
|
|
const char* names[] = {
|
|
"RepaintFrame", "NeedReflow", "ClearAncestorIntrinsics",
|
|
"ClearDescendantIntrinsics", "NeedDirtyReflow", "SyncFrameView",
|
|
"UpdateCursor", "UpdateEffects", "UpdateOpacityLayer",
|
|
"UpdateTransformLayer", "ReconstructFrame", "UpdateOverflow",
|
|
"UpdateSubtreeOverflow", "UpdatePostTransformOverflow",
|
|
"UpdateParentOverflow",
|
|
"ChildrenOnlyTransform", "RecomputePosition", "UpdateContainingBlock",
|
|
"BorderStyleNoneChange", "UpdateTextPath", "SchedulePaint",
|
|
"NeutralChange", "InvalidateRenderingObservers",
|
|
"ReflowChangesSizeOrPosition", "UpdateComputedBSize",
|
|
"UpdateUsesOpacity", "UpdateBackgroundPosition",
|
|
"AddOrRemoveTransform", "CSSOverflowChange",
|
|
"UpdateWidgetProperties", "UpdateTableCellSpans",
|
|
"VisibilityChange"
|
|
};
|
|
static_assert(nsChangeHint_AllHints ==
|
|
static_cast<uint32_t>((1ull << ArrayLength(names)) - 1),
|
|
"Name list doesn't match change hints.");
|
|
uint32_t hint = aHint & static_cast<uint32_t>((1ull << ArrayLength(names)) - 1);
|
|
uint32_t rest = aHint & ~static_cast<uint32_t>((1ull << ArrayLength(names)) - 1);
|
|
if ((hint & NS_STYLE_HINT_REFLOW) == NS_STYLE_HINT_REFLOW) {
|
|
result.AppendLiteral("NS_STYLE_HINT_REFLOW");
|
|
hint = hint & ~NS_STYLE_HINT_REFLOW;
|
|
any = true;
|
|
} else if ((hint & nsChangeHint_AllReflowHints) == nsChangeHint_AllReflowHints) {
|
|
result.AppendLiteral("nsChangeHint_AllReflowHints");
|
|
hint = hint & ~nsChangeHint_AllReflowHints;
|
|
any = true;
|
|
} else if ((hint & NS_STYLE_HINT_VISUAL) == NS_STYLE_HINT_VISUAL) {
|
|
result.AppendLiteral("NS_STYLE_HINT_VISUAL");
|
|
hint = hint & ~NS_STYLE_HINT_VISUAL;
|
|
any = true;
|
|
}
|
|
for (uint32_t i = 0; i < ArrayLength(names); i++) {
|
|
if (hint & (1u << i)) {
|
|
if (any) {
|
|
result.AppendLiteral(" | ");
|
|
}
|
|
result.AppendPrintf("nsChangeHint_%s", names[i]);
|
|
any = true;
|
|
}
|
|
}
|
|
if (rest) {
|
|
if (any) {
|
|
result.AppendLiteral(" | ");
|
|
}
|
|
result.AppendPrintf("0x%0x", rest);
|
|
} else {
|
|
if (!any) {
|
|
result.AppendLiteral("nsChangeHint(0)");
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Frame construction helpers follow.
|
|
*/
|
|
#ifdef DEBUG
|
|
static bool gInApplyRenderingChangeToTree = false;
|
|
#endif
|
|
|
|
/**
|
|
* Sync views on aFrame and all of aFrame's descendants (following placeholders),
|
|
* if aChange has nsChangeHint_SyncFrameView.
|
|
* Calls DoApplyRenderingChangeToTree on all aFrame's out-of-flow descendants
|
|
* (following placeholders), if aChange has nsChangeHint_RepaintFrame.
|
|
* aFrame should be some combination of nsChangeHint_SyncFrameView,
|
|
* nsChangeHint_RepaintFrame, nsChangeHint_UpdateOpacityLayer and
|
|
* nsChangeHint_SchedulePaint, nothing else.
|
|
*/
|
|
static void SyncViewsAndInvalidateDescendants(nsIFrame* aFrame,
|
|
nsChangeHint aChange);
|
|
|
|
static void StyleChangeReflow(nsIFrame* aFrame, nsChangeHint aHint);
|
|
|
|
/**
|
|
* To handle nsChangeHint_ChildrenOnlyTransform we must iterate over the child
|
|
* frames of the SVG frame concerned. This helper function is used to find that
|
|
* SVG frame when we encounter nsChangeHint_ChildrenOnlyTransform to ensure
|
|
* that we iterate over the intended children, since sometimes we end up
|
|
* handling that hint while processing hints for one of the SVG frame's
|
|
* ancestor frames.
|
|
*
|
|
* The reason that we sometimes end up trying to process the hint for an
|
|
* ancestor of the SVG frame that the hint is intended for is due to the way we
|
|
* process restyle events. ApplyRenderingChangeToTree adjusts the frame from
|
|
* the restyled element's principle frame to one of its ancestor frames based
|
|
* on what nsCSSRendering::FindBackground returns, since the background style
|
|
* may have been propagated up to an ancestor frame. Processing hints using an
|
|
* ancestor frame is fine in general, but nsChangeHint_ChildrenOnlyTransform is
|
|
* a special case since it is intended to update the children of a specific
|
|
* frame.
|
|
*/
|
|
static nsIFrame*
|
|
GetFrameForChildrenOnlyTransformHint(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->IsViewportFrame()) {
|
|
// This happens if the root-<svg> is fixed positioned, in which case we
|
|
// can't use aFrame->GetContent() to find the primary frame, since
|
|
// GetContent() returns nullptr for ViewportFrame.
|
|
aFrame = aFrame->PrincipalChildList().FirstChild();
|
|
}
|
|
// For an nsHTMLScrollFrame, this will get the SVG frame that has the
|
|
// children-only transforms:
|
|
aFrame = aFrame->GetContent()->GetPrimaryFrame();
|
|
if (aFrame->IsSVGOuterSVGFrame()) {
|
|
aFrame = aFrame->PrincipalChildList().FirstChild();
|
|
MOZ_ASSERT(aFrame->IsSVGOuterSVGAnonChildFrame(),
|
|
"Where is the nsSVGOuterSVGFrame's anon child??");
|
|
}
|
|
MOZ_ASSERT(aFrame->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer),
|
|
"Children-only transforms only expected on SVG frames");
|
|
return aFrame;
|
|
}
|
|
|
|
// Returns true if this function managed to successfully move a frame, and
|
|
// false if it could not process the position change, and a reflow should
|
|
// be performed instead.
|
|
static bool
|
|
RecomputePosition(nsIFrame* aFrame)
|
|
{
|
|
// Don't process position changes on table frames, since we already handle
|
|
// the dynamic position change on the table wrapper frame, and the
|
|
// reflow-based fallback code path also ignores positions on inner table
|
|
// frames.
|
|
if (aFrame->IsTableFrame()) {
|
|
return true;
|
|
}
|
|
|
|
const nsStyleDisplay* display = aFrame->StyleDisplay();
|
|
// Changes to the offsets of a non-positioned element can safely be ignored.
|
|
if (display->mPosition == NS_STYLE_POSITION_STATIC) {
|
|
return true;
|
|
}
|
|
|
|
// Don't process position changes on frames which have views or the ones which
|
|
// have a view somewhere in their descendants, because the corresponding view
|
|
// needs to be repositioned properly as well.
|
|
if (aFrame->HasView() ||
|
|
(aFrame->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW)) {
|
|
StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
|
|
return false;
|
|
}
|
|
|
|
// Flexbox and Grid layout supports CSS Align and the optimizations below
|
|
// don't support that yet.
|
|
if (aFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) {
|
|
nsIFrame* ph = aFrame->GetPlaceholderFrame();
|
|
if (ph && ph->HasAnyStateBits(PLACEHOLDER_STATICPOS_NEEDS_CSSALIGN)) {
|
|
StyleChangeReflow(aFrame, nsChangeHint_NeedReflow);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
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.
|
|
bool hasProperty;
|
|
nsPoint normalPosition = cont->GetNormalPosition(&hasProperty);
|
|
if (!hasProperty) {
|
|
cont->AddProperty(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.
|
|
RefPtr<gfxContext> rc =
|
|
aFrame->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->IsTableFrame())) {
|
|
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->IsPlaceholderFrame()) {
|
|
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(!nsSVGUtils::IsInSVGTextSubtree(outOfFlow),
|
|
"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 void
|
|
DoApplyRenderingChangeToTree(nsIFrame* aFrame,
|
|
nsChangeHint aChange)
|
|
{
|
|
MOZ_ASSERT(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 (nsSVGUtils::IsInSVGTextSubtree(aFrame)) {
|
|
// Invalidate and reflow the entire SVGTextFrame:
|
|
NS_ASSERTION(aFrame->GetContent()->IsSVGElement(nsGkAtoms::textPath),
|
|
"expected frame for a <textPath> element");
|
|
nsIFrame* text = nsLayoutUtils::GetClosestFrameOfType(
|
|
aFrame, LayoutFrameType::SVGText);
|
|
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) {
|
|
nsDisplayItem::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)
|
|
{
|
|
MOZ_ASSERT(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");
|
|
|
|
if (aChange & nsChangeHint_SyncFrameView) {
|
|
aFrame->SyncFrameViewProperties();
|
|
}
|
|
|
|
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 (child->IsPlaceholderFrame()) {
|
|
// 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.
|
|
ComputedStyle* 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->PresShell()->FrameNeedsReflow(
|
|
aFrame, dirtyType, dirtyBits, rootHandling);
|
|
aFrame = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(aFrame);
|
|
} while (aFrame);
|
|
}
|
|
|
|
// Get the next sibling which might have a frame. This only considers siblings
|
|
// that stylo post-traversal looks at, so only elements and text. In
|
|
// particular, it ignores comments.
|
|
static nsIContent*
|
|
NextSiblingWhichMayHaveFrame(nsIContent* aContent)
|
|
{
|
|
for (nsIContent* next = aContent->GetNextSibling();
|
|
next;
|
|
next = next->GetNextSibling()) {
|
|
if (next->IsElement() || next->IsText()) {
|
|
return next;
|
|
}
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
RestyleManager::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;
|
|
}
|
|
|
|
// 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>>>();
|
|
}
|
|
|
|
AUTO_PROFILER_LABEL("RestyleManager::ProcessRestyledFrames", CSS);
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
nsCSSFrameConstructor* frameConstructor = presContext->FrameConstructor();
|
|
|
|
// Handle nsChangeHint_CSSOverflowChange, by either updating the
|
|
// scrollbars on the viewport, or upgrading the change hint to frame-reconstruct.
|
|
for (nsStyleChangeData& data : aChangeList) {
|
|
if (data.mHint & nsChangeHint_CSSOverflowChange) {
|
|
data.mHint &= ~nsChangeHint_CSSOverflowChange;
|
|
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->GetViewportScrollbarStylesOverrideElement();
|
|
nsIContent* newOverrideNode =
|
|
presContext->UpdateViewportScrollbarStylesOverride();
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool didUpdateCursor = false;
|
|
|
|
for (size_t i = 0; i < aChangeList.Length(); ++i) {
|
|
|
|
// Collect and coalesce adjacent siblings for lazy frame construction.
|
|
// Eventually it would be even better to make RecreateFramesForContent
|
|
// accept a range and coalesce all adjacent reconstructs (bug 1344139).
|
|
size_t lazyRangeStart = i;
|
|
while (i < aChangeList.Length() &&
|
|
aChangeList[i].mContent &&
|
|
aChangeList[i].mContent->HasFlag(NODE_NEEDS_FRAME) &&
|
|
(i == lazyRangeStart ||
|
|
NextSiblingWhichMayHaveFrame(aChangeList[i - 1].mContent) ==
|
|
aChangeList[i].mContent))
|
|
{
|
|
MOZ_ASSERT(aChangeList[i].mHint & nsChangeHint_ReconstructFrame);
|
|
MOZ_ASSERT(!aChangeList[i].mFrame);
|
|
++i;
|
|
}
|
|
if (i != lazyRangeStart) {
|
|
nsIContent* start = aChangeList[lazyRangeStart].mContent;
|
|
nsIContent* end = NextSiblingWhichMayHaveFrame(aChangeList[i-1].mContent);
|
|
if (!end) {
|
|
frameConstructor->ContentAppended(
|
|
start,
|
|
nsCSSFrameConstructor::InsertionKind::Sync);
|
|
} else {
|
|
frameConstructor->ContentRangeInserted(
|
|
start,
|
|
end,
|
|
nullptr,
|
|
nsCSSFrameConstructor::InsertionKind::Sync);
|
|
}
|
|
}
|
|
for (size_t j = lazyRangeStart; j < i; ++j) {
|
|
MOZ_ASSERT(!aChangeList[j].mContent->GetPrimaryFrame() ||
|
|
!aChangeList[j].mContent->HasFlag(NODE_NEEDS_FRAME));
|
|
}
|
|
if (i == aChangeList.Length()) {
|
|
break;
|
|
}
|
|
|
|
const nsStyleChangeData& data = aChangeList[i];
|
|
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->IsFieldSetFrame() ||
|
|
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);
|
|
} 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_AddOrRemoveTransform) {
|
|
// When dropping a running transform animation we will first add an
|
|
// nsChangeHint_UpdateTransformLayer hint as part of the animation-only
|
|
// restyle. During the subsequent regular restyle, if the animation was
|
|
// the only reason the element had any transform applied, we will add
|
|
// nsChangeHint_AddOrRemoveTransform as part of the regular restyle.
|
|
//
|
|
// With the Gecko backend, these two change hints are processed
|
|
// after each restyle but when using the Servo backend they accumulate
|
|
// and are processed together after we have already removed the
|
|
// transform as part of the regular restyle. Since we don't actually
|
|
// need the nsChangeHint_UpdateTransformLayer hint if we already have
|
|
// a nsChangeHint_AddOrRemoveTransform hint, and since we
|
|
// will fail an assertion in ApplyRenderingChangeToTree if we try
|
|
// specify nsChangeHint_UpdateTransformLayer but don't have any
|
|
// transform style, we just drop the unneeded hint here.
|
|
hint &= ~nsChangeHint_UpdateTransformLayer;
|
|
}
|
|
|
|
if (hint & nsChangeHint_UpdateEffects) {
|
|
for (nsIFrame* cont = frame; cont;
|
|
cont = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(cont)) {
|
|
SVGObserverUtils::UpdateEffects(cont);
|
|
}
|
|
}
|
|
if ((hint & nsChangeHint_InvalidateRenderingObservers) ||
|
|
((hint & nsChangeHint_UpdateOpacityLayer) &&
|
|
frame->IsFrameOfType(nsIFrame::eSVG) &&
|
|
!(frame->GetStateBits() & NS_STATE_IS_OUTER_SVG))) {
|
|
SVGObserverUtils::InvalidateRenderingObservers(frame);
|
|
frame->SchedulePaint();
|
|
}
|
|
if (hint & nsChangeHint_NeedReflow) {
|
|
StyleChangeReflow(frame, hint);
|
|
didReflowThisFrame = true;
|
|
}
|
|
|
|
// Here we need to propagate repaint frame change hint instead of update
|
|
// opacity layer change hint when we do opacity optimization for SVG.
|
|
// We can't do it in nsStyleEffects::CalcDifference() just like we do
|
|
// for the optimization for 0.99 over opacity values since we have no way
|
|
// to call nsSVGUtils::CanOptimizeOpacity() there.
|
|
if ((hint & nsChangeHint_UpdateOpacityLayer) &&
|
|
nsSVGUtils::CanOptimizeOpacity(frame) &&
|
|
frame->IsFrameOfType(nsIFrame::eSVGGeometry)) {
|
|
hint &= ~nsChangeHint_UpdateOpacityLayer;
|
|
hint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
|
|
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;
|
|
}
|
|
if (hint & nsChangeHint_UpdateWidgetProperties) {
|
|
frame->UpdateWidgetProperties();
|
|
}
|
|
if (hint & nsChangeHint_UpdateTableCellSpans) {
|
|
frameConstructor->UpdateTableCellSpans(content);
|
|
}
|
|
if (hint & nsChangeHint_VisibilityChange) {
|
|
frame->UpdateVisibleDescendantsState();
|
|
}
|
|
}
|
|
}
|
|
|
|
aChangeList.Clear();
|
|
}
|
|
|
|
/* static */ uint64_t
|
|
RestyleManager::GetAnimationGenerationForFrame(nsIFrame* aFrame)
|
|
{
|
|
EffectSet* effectSet = EffectSet::GetEffectSet(aFrame);
|
|
return effectSet ? effectSet->GetAnimationGeneration() : 0;
|
|
}
|
|
|
|
void
|
|
RestyleManager::IncrementAnimationGeneration()
|
|
{
|
|
// We update the animation generation at start of each call to
|
|
// ProcessPendingRestyles so we should ignore any subsequent (redundant)
|
|
// calls that occur while we are still processing restyles.
|
|
if (!mInStyleRefresh) {
|
|
++mAnimationGeneration;
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
RestyleManager::AddLayerChangesForAnimation(nsIFrame* aFrame,
|
|
nsIContent* aContent,
|
|
nsStyleChangeList&
|
|
aChangeListToProcess)
|
|
{
|
|
if (!aFrame || !aContent) {
|
|
return;
|
|
}
|
|
|
|
uint64_t frameGeneration =
|
|
RestyleManager::GetAnimationGenerationForFrame(aFrame);
|
|
|
|
nsChangeHint hint = nsChangeHint(0);
|
|
for (const LayerAnimationInfo::Record& layerInfo :
|
|
LayerAnimationInfo::sRecords) {
|
|
layers::Layer* layer =
|
|
FrameLayerBuilder::GetDedicatedLayer(aFrame, layerInfo.mLayerType);
|
|
if (layer && frameGeneration != layer->GetAnimationGeneration()) {
|
|
// If we have a transform layer but don't have any transform style, we
|
|
// probably just removed the transform but haven't destroyed the layer
|
|
// yet. In this case we will add the appropriate change hint
|
|
// (nsChangeHint_UpdateContainingBlock) when we compare styles so we can
|
|
// skip adding any change hint here. (If we *were* to add
|
|
// nsChangeHint_UpdateTransformLayer, ApplyRenderingChangeToTree would
|
|
// complain that we're updating a transform layer without a transform).
|
|
if (layerInfo.mLayerType == DisplayItemType::TYPE_TRANSFORM &&
|
|
!aFrame->StyleDisplay()->HasTransformStyle()) {
|
|
continue;
|
|
}
|
|
hint |= layerInfo.mChangeHint;
|
|
}
|
|
|
|
// We consider it's the first paint for the frame if we have an animation
|
|
// for the property but have no layer.
|
|
// Note that in case of animations which has properties preventing running
|
|
// on the compositor, e.g., width or height, corresponding layer is not
|
|
// created at all, but even in such cases, we normally set valid change
|
|
// hint for such animations in each tick, i.e. restyles in each tick. As
|
|
// a result, we usually do restyles for such animations in every tick on
|
|
// the main-thread. The only animations which will be affected by this
|
|
// explicit change hint are animations that have opacity/transform but did
|
|
// not have those properies just before. e.g, setting transform by
|
|
// setKeyframes or changing target element from other target which prevents
|
|
// running on the compositor, etc.
|
|
if (!layer &&
|
|
nsLayoutUtils::HasEffectiveAnimation(aFrame, layerInfo.mProperty)) {
|
|
hint |= layerInfo.mChangeHint;
|
|
}
|
|
}
|
|
|
|
if (hint) {
|
|
aChangeListToProcess.AppendChange(aFrame, aContent, hint);
|
|
}
|
|
}
|
|
|
|
RestyleManager::AnimationsWithDestroyedFrame::AnimationsWithDestroyedFrame(
|
|
RestyleManager* aRestyleManager)
|
|
: mRestyleManager(aRestyleManager)
|
|
, mRestorePointer(mRestyleManager->mAnimationsWithDestroyedFrame)
|
|
{
|
|
MOZ_ASSERT(!mRestyleManager->mAnimationsWithDestroyedFrame,
|
|
"shouldn't construct recursively");
|
|
mRestyleManager->mAnimationsWithDestroyedFrame = this;
|
|
}
|
|
|
|
void
|
|
RestyleManager::AnimationsWithDestroyedFrame
|
|
::StopAnimationsForElementsWithoutFrames()
|
|
{
|
|
StopAnimationsWithoutFrame(mContents, CSSPseudoElementType::NotPseudo);
|
|
StopAnimationsWithoutFrame(mBeforeContents, CSSPseudoElementType::before);
|
|
StopAnimationsWithoutFrame(mAfterContents, CSSPseudoElementType::after);
|
|
}
|
|
|
|
void
|
|
RestyleManager::AnimationsWithDestroyedFrame
|
|
::StopAnimationsWithoutFrame(
|
|
nsTArray<RefPtr<nsIContent>>& aArray,
|
|
CSSPseudoElementType aPseudoType)
|
|
{
|
|
nsAnimationManager* animationManager =
|
|
mRestyleManager->PresContext()->AnimationManager();
|
|
nsTransitionManager* transitionManager =
|
|
mRestyleManager->PresContext()->TransitionManager();
|
|
for (nsIContent* content : aArray) {
|
|
if (aPseudoType == CSSPseudoElementType::NotPseudo) {
|
|
if (content->GetPrimaryFrame()) {
|
|
continue;
|
|
}
|
|
} else if (aPseudoType == CSSPseudoElementType::before) {
|
|
if (nsLayoutUtils::GetBeforeFrame(content)) {
|
|
continue;
|
|
}
|
|
} else if (aPseudoType == CSSPseudoElementType::after) {
|
|
if (nsLayoutUtils::GetAfterFrame(content)) {
|
|
continue;
|
|
}
|
|
}
|
|
dom::Element* element = content->AsElement();
|
|
|
|
animationManager->StopAnimationsForElement(element, aPseudoType);
|
|
transitionManager->StopAnimationsForElement(element, aPseudoType);
|
|
|
|
// All other animations should keep running but not running on the
|
|
// *compositor* at this point.
|
|
EffectSet* effectSet = EffectSet::GetEffectSet(element, aPseudoType);
|
|
if (effectSet) {
|
|
for (KeyframeEffectReadOnly* effect : *effectSet) {
|
|
effect->ResetIsRunningOnCompositor();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static bool
|
|
IsAnonBox(const nsIFrame& aFrame)
|
|
{
|
|
return aFrame.Style()->IsAnonBox();
|
|
}
|
|
|
|
static const nsIFrame*
|
|
FirstContinuationOrPartOfIBSplit(const nsIFrame* aFrame)
|
|
{
|
|
if (!aFrame) {
|
|
return nullptr;
|
|
}
|
|
|
|
return nsLayoutUtils::FirstContinuationOrIBSplitSibling(aFrame);
|
|
}
|
|
|
|
static const nsIFrame*
|
|
ExpectedOwnerForChild(const nsIFrame& aFrame)
|
|
{
|
|
const nsIFrame* parent = aFrame.GetParent();
|
|
if (aFrame.IsTableFrame()) {
|
|
MOZ_ASSERT(parent->IsTableWrapperFrame());
|
|
parent = parent->GetParent();
|
|
}
|
|
|
|
if (IsAnonBox(aFrame) && !aFrame.IsTextFrame()) {
|
|
if (parent->IsLineFrame()) {
|
|
parent = parent->GetParent();
|
|
}
|
|
return parent->IsViewportFrame() ?
|
|
nullptr : FirstContinuationOrPartOfIBSplit(parent);
|
|
}
|
|
|
|
if (aFrame.IsBulletFrame()) {
|
|
return FirstContinuationOrPartOfIBSplit(parent);
|
|
}
|
|
|
|
if (aFrame.IsLineFrame()) {
|
|
// A ::first-line always ends up here via its block, which is therefore the
|
|
// right expected owner. That block can be an
|
|
// anonymous box. For example, we could have a ::first-line on a columnated
|
|
// block; the blockframe is the column-content anonymous box in that case.
|
|
// So we don't want to end up in the code below, which steps out of anon
|
|
// boxes. Just return the parent of the line frame, which is the block.
|
|
return parent;
|
|
}
|
|
|
|
if (aFrame.IsLetterFrame()) {
|
|
// Ditto for ::first-letter. A first-letter always arrives here via its
|
|
// direct parent, except when it's parented to a ::first-line.
|
|
if (parent->IsLineFrame()) {
|
|
parent = parent->GetParent();
|
|
}
|
|
return FirstContinuationOrPartOfIBSplit(parent);
|
|
}
|
|
|
|
if (parent->IsLetterFrame()) {
|
|
// Things never have ::first-letter as their expected parent. Go
|
|
// on up to the ::first-letter's parent.
|
|
parent = parent->GetParent();
|
|
}
|
|
|
|
parent = FirstContinuationOrPartOfIBSplit(parent);
|
|
|
|
// We've handled already anon boxes and bullet frames, so now we're looking at
|
|
// a frame of a DOM element or pseudo. Hop through anon and line-boxes
|
|
// generated by our DOM parent, and go find the owner frame for it.
|
|
while (parent && (IsAnonBox(*parent) || parent->IsLineFrame())) {
|
|
auto* pseudo = parent->Style()->GetPseudo();
|
|
if (pseudo == nsCSSAnonBoxes::tableWrapper) {
|
|
const nsIFrame* tableFrame = parent->PrincipalChildList().FirstChild();
|
|
MOZ_ASSERT(tableFrame->IsTableFrame());
|
|
// Handle :-moz-table and :-moz-inline-table.
|
|
parent = IsAnonBox(*tableFrame) ? parent->GetParent() : tableFrame;
|
|
} else {
|
|
// We get the in-flow parent here so that we can handle the OOF anonymous
|
|
// boxed to get the correct parent.
|
|
parent = parent->GetInFlowParent();
|
|
}
|
|
parent = FirstContinuationOrPartOfIBSplit(parent);
|
|
}
|
|
|
|
return parent;
|
|
}
|
|
|
|
void
|
|
ServoRestyleState::AssertOwner(const ServoRestyleState& aParent) const
|
|
{
|
|
MOZ_ASSERT(mOwner);
|
|
MOZ_ASSERT(!mOwner->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW));
|
|
// We allow aParent.mOwner to be null, for cases when we're not starting at
|
|
// the root of the tree. We also allow aParent.mOwner to be somewhere up our
|
|
// expected owner chain not our immediate owner, which allows us creating long
|
|
// chains of ServoRestyleStates in some cases where it's just not worth it.
|
|
#ifdef DEBUG
|
|
if (aParent.mOwner) {
|
|
const nsIFrame* owner = ExpectedOwnerForChild(*mOwner);
|
|
if (owner != aParent.mOwner) {
|
|
MOZ_ASSERT(IsAnonBox(*owner),
|
|
"Should only have expected owner weirdness when anon boxes are involved");
|
|
bool found = false;
|
|
for (; owner; owner = ExpectedOwnerForChild(*owner)) {
|
|
if (owner == aParent.mOwner) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
MOZ_ASSERT(found, "Must have aParent.mOwner on our expected owner chain");
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
nsChangeHint
|
|
ServoRestyleState::ChangesHandledFor(const nsIFrame& aFrame) const
|
|
{
|
|
if (!mOwner) {
|
|
MOZ_ASSERT(!mChangesHandled);
|
|
return mChangesHandled;
|
|
}
|
|
|
|
MOZ_ASSERT(mOwner == ExpectedOwnerForChild(aFrame),
|
|
"Missed some frame in the hierarchy?");
|
|
return mChangesHandled;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
ServoRestyleState::AddPendingWrapperRestyle(nsIFrame* aWrapperFrame)
|
|
{
|
|
MOZ_ASSERT(aWrapperFrame->Style()->IsWrapperAnonBox(),
|
|
"All our wrappers are anon boxes, and why would we restyle "
|
|
"non-inheriting ones?");
|
|
MOZ_ASSERT(aWrapperFrame->Style()->IsInheritingAnonBox(),
|
|
"All our wrappers are anon boxes, and why would we restyle "
|
|
"non-inheriting ones?");
|
|
MOZ_ASSERT(aWrapperFrame->Style()->GetPseudo() !=
|
|
nsCSSAnonBoxes::cellContent,
|
|
"Someone should be using TableAwareParentFor");
|
|
MOZ_ASSERT(aWrapperFrame->Style()->GetPseudo() !=
|
|
nsCSSAnonBoxes::tableWrapper,
|
|
"Someone should be using TableAwareParentFor");
|
|
// Make sure we only add first continuations.
|
|
aWrapperFrame = aWrapperFrame->FirstContinuation();
|
|
nsIFrame* last = mPendingWrapperRestyles.SafeLastElement(nullptr);
|
|
if (last == aWrapperFrame) {
|
|
// Already queued up, nothing to do.
|
|
return;
|
|
}
|
|
|
|
// Make sure to queue up parents before children. But don't queue up
|
|
// ancestors of non-anonymous boxes here; those are handled when we traverse
|
|
// their non-anonymous kids.
|
|
if (aWrapperFrame->ParentIsWrapperAnonBox()) {
|
|
AddPendingWrapperRestyle(TableAwareParentFor(aWrapperFrame));
|
|
}
|
|
|
|
// If the append fails, we'll fail to restyle properly, but that's probably
|
|
// better than crashing.
|
|
if (mPendingWrapperRestyles.AppendElement(aWrapperFrame, fallible)) {
|
|
aWrapperFrame->SetIsWrapperAnonBoxNeedingRestyle(true);
|
|
}
|
|
}
|
|
|
|
void
|
|
ServoRestyleState::ProcessWrapperRestyles(nsIFrame* aParentFrame)
|
|
{
|
|
size_t i = mPendingWrapperRestyleOffset;
|
|
while (i < mPendingWrapperRestyles.Length()) {
|
|
i += ProcessMaybeNestedWrapperRestyle(aParentFrame, i);
|
|
}
|
|
|
|
mPendingWrapperRestyles.TruncateLength(mPendingWrapperRestyleOffset);
|
|
}
|
|
|
|
size_t
|
|
ServoRestyleState::ProcessMaybeNestedWrapperRestyle(nsIFrame* aParent,
|
|
size_t aIndex)
|
|
{
|
|
// The frame at index aIndex is something we should restyle ourselves, but
|
|
// following frames may need separate ServoRestyleStates to restyle.
|
|
MOZ_ASSERT(aIndex < mPendingWrapperRestyles.Length());
|
|
|
|
nsIFrame* cur = mPendingWrapperRestyles[aIndex];
|
|
MOZ_ASSERT(cur->Style()->IsWrapperAnonBox());
|
|
|
|
// Where is cur supposed to inherit from? From its parent frame, except in
|
|
// the case when cur is a table, in which case it should be its grandparent.
|
|
// Also, not in the case when the resulting frame would be a first-line; in
|
|
// that case we should be inheriting from the block, and the first-line will
|
|
// do its fixup later if needed.
|
|
//
|
|
// Note that after we do all that fixup the parent we get might still not be
|
|
// aParent; for example aParent could be a scrollframe, in which case we
|
|
// should inherit from the scrollcontent frame. Or the parent might be some
|
|
// continuation of aParent.
|
|
//
|
|
// Try to assert as much as we can about the parent we actually end up using
|
|
// without triggering bogus asserts in all those various edge cases.
|
|
nsIFrame* parent = cur->GetParent();
|
|
if (cur->IsTableFrame()) {
|
|
MOZ_ASSERT(parent->IsTableWrapperFrame());
|
|
parent = parent->GetParent();
|
|
}
|
|
if (parent->IsLineFrame()) {
|
|
parent = parent->GetParent();
|
|
}
|
|
MOZ_ASSERT(FirstContinuationOrPartOfIBSplit(parent) == aParent ||
|
|
(parent->Style()->IsInheritingAnonBox() &&
|
|
parent->GetContent() == aParent->GetContent()));
|
|
|
|
// Now "this" is a ServoRestyleState for aParent, so if parent is not a next
|
|
// continuation (possibly across ib splits) of aParent we need a new
|
|
// ServoRestyleState for the kid.
|
|
Maybe<ServoRestyleState> parentRestyleState;
|
|
nsIFrame* parentForRestyle =
|
|
nsLayoutUtils::FirstContinuationOrIBSplitSibling(parent);
|
|
if (parentForRestyle != aParent) {
|
|
parentRestyleState.emplace(*parentForRestyle, *this, nsChangeHint_Empty,
|
|
Type::InFlow);
|
|
}
|
|
ServoRestyleState& curRestyleState =
|
|
parentRestyleState ? *parentRestyleState : *this;
|
|
|
|
// This frame may already have been restyled. Even if it has, we can't just
|
|
// return, because the next frame may be a kid of it that does need restyling.
|
|
if (cur->IsWrapperAnonBoxNeedingRestyle()) {
|
|
parentForRestyle->UpdateStyleOfChildAnonBox(cur, curRestyleState);
|
|
cur->SetIsWrapperAnonBoxNeedingRestyle(false);
|
|
}
|
|
|
|
size_t numProcessed = 1;
|
|
|
|
// Note: no overflow possible here, since aIndex < length.
|
|
if (aIndex + 1 < mPendingWrapperRestyles.Length()) {
|
|
nsIFrame* next = mPendingWrapperRestyles[aIndex + 1];
|
|
if (TableAwareParentFor(next) == cur &&
|
|
next->IsWrapperAnonBoxNeedingRestyle()) {
|
|
// It might be nice if we could do better than nsChangeHint_Empty. On
|
|
// the other hand, presumably our mChangesHandled already has the bits
|
|
// we really want here so in practice it doesn't matter.
|
|
ServoRestyleState childState(*cur, curRestyleState, nsChangeHint_Empty,
|
|
Type::InFlow,
|
|
/* aAssertWrapperRestyleLength = */ false);
|
|
numProcessed += childState.ProcessMaybeNestedWrapperRestyle(cur,
|
|
aIndex + 1);
|
|
}
|
|
}
|
|
|
|
return numProcessed;
|
|
}
|
|
|
|
nsIFrame*
|
|
ServoRestyleState::TableAwareParentFor(const nsIFrame* aChild)
|
|
{
|
|
// We want to get the anon box parent for aChild. where aChild has
|
|
// ParentIsWrapperAnonBox().
|
|
//
|
|
// For the most part this is pretty straightforward, but there are two
|
|
// wrinkles. First, if aChild is a table, then we really want the parent of
|
|
// its table wrapper.
|
|
if (aChild->IsTableFrame()) {
|
|
aChild = aChild->GetParent();
|
|
MOZ_ASSERT(aChild->IsTableWrapperFrame());
|
|
}
|
|
|
|
nsIFrame* parent = aChild->GetParent();
|
|
// Now if parent is a cell-content frame, we actually want the cellframe.
|
|
if (parent->Style()->GetPseudo() == nsCSSAnonBoxes::cellContent) {
|
|
parent = parent->GetParent();
|
|
} else if (parent->IsTableWrapperFrame()) {
|
|
// Must be a caption. In that case we want the table here.
|
|
MOZ_ASSERT(aChild->StyleDisplay()->mDisplay == StyleDisplay::TableCaption);
|
|
parent = parent->PrincipalChildList().FirstChild();
|
|
}
|
|
return parent;
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRestyleEvent(Element* aElement,
|
|
nsRestyleHint aRestyleHint,
|
|
nsChangeHint aMinChangeHint)
|
|
{
|
|
MOZ_ASSERT(!(aMinChangeHint & nsChangeHint_NeutralChange),
|
|
"Didn't expect explicit change hints to be neutral!");
|
|
if (MOZ_UNLIKELY(IsDisconnected()) ||
|
|
MOZ_UNLIKELY(PresContext()->PresShell()->IsDestroying())) {
|
|
return;
|
|
}
|
|
|
|
// We allow posting restyles from within change hint handling, but not from
|
|
// within the restyle algorithm itself.
|
|
MOZ_ASSERT(!ServoStyleSet::IsInServoTraversal());
|
|
|
|
if (aRestyleHint == 0 && !aMinChangeHint) {
|
|
return; // Nothing to do.
|
|
}
|
|
|
|
// Assuming the restyle hints will invalidate cached style for
|
|
// getComputedStyle, since we don't know if any of the restyling that we do
|
|
// would affect undisplayed elements.
|
|
if (aRestyleHint) {
|
|
IncrementUndisplayedRestyleGeneration();
|
|
}
|
|
|
|
// Processing change hints sometimes causes new change hints to be generated,
|
|
// and very occasionally, additional restyle hints. We collect the change
|
|
// hints manually to avoid re-traversing the DOM to find them.
|
|
if (mReentrantChanges && !aRestyleHint) {
|
|
mReentrantChanges->AppendElement(ReentrantChange { aElement, aMinChangeHint });
|
|
return;
|
|
}
|
|
|
|
if (aRestyleHint & ~eRestyle_AllHintsWithAnimations) {
|
|
mHaveNonAnimationRestyles = true;
|
|
}
|
|
|
|
if (aRestyleHint & eRestyle_LaterSiblings) {
|
|
aRestyleHint &= ~eRestyle_LaterSiblings;
|
|
|
|
nsRestyleHint siblingHint = eRestyle_Subtree;
|
|
Element* current = aElement->GetNextElementSibling();
|
|
while (current) {
|
|
Servo_NoteExplicitHints(current, siblingHint, nsChangeHint(0));
|
|
current = current->GetNextElementSibling();
|
|
}
|
|
}
|
|
|
|
if (aRestyleHint || aMinChangeHint) {
|
|
Servo_NoteExplicitHints(aElement, aRestyleHint, aMinChangeHint);
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRestyleEventForCSSRuleChanges()
|
|
{
|
|
mRestyleForCSSRuleChanges = true;
|
|
mPresContext->PresShell()->EnsureStyleFlush();
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRestyleEventForAnimations(
|
|
Element* aElement,
|
|
CSSPseudoElementType aPseudoType,
|
|
nsRestyleHint aRestyleHint)
|
|
{
|
|
Element* elementToRestyle =
|
|
EffectCompositor::GetElementToRestyle(aElement, aPseudoType);
|
|
|
|
if (!elementToRestyle) {
|
|
// FIXME: Bug 1371107: When reframing happens,
|
|
// EffectCompositor::mElementsToRestyle still has unbinded old pseudo
|
|
// element. We should drop it.
|
|
return;
|
|
}
|
|
|
|
AutoRestyleTimelineMarker marker(mPresContext->GetDocShell(),
|
|
true /* animation-only */);
|
|
Servo_NoteExplicitHints(elementToRestyle, aRestyleHint, nsChangeHint(0));
|
|
}
|
|
|
|
void
|
|
RestyleManager::RebuildAllStyleData(nsChangeHint aExtraHint,
|
|
nsRestyleHint aRestyleHint)
|
|
{
|
|
// NOTE(emilio): GeckoRestlyeManager does a sync style flush, which seems not
|
|
// to be needed in my testing.
|
|
PostRebuildAllStyleDataEvent(aExtraHint, aRestyleHint);
|
|
}
|
|
|
|
void
|
|
RestyleManager::PostRebuildAllStyleDataEvent(nsChangeHint aExtraHint,
|
|
nsRestyleHint aRestyleHint)
|
|
{
|
|
// NOTE(emilio): The semantics of these methods are quite funny, in the sense
|
|
// that we're not supposed to need to rebuild the actual stylist data.
|
|
//
|
|
// That's handled as part of the MediumFeaturesChanged stuff, if needed.
|
|
StyleSet()->ClearCachedStyleData();
|
|
|
|
DocumentStyleRootIterator iter(mPresContext->Document());
|
|
while (Element* root = iter.GetNextStyleRoot()) {
|
|
PostRestyleEvent(root, aRestyleHint, aExtraHint);
|
|
}
|
|
|
|
// TODO(emilio, bz): Extensions can add/remove stylesheets that can affect
|
|
// non-inheriting anon boxes. It's not clear if we want to support that, but
|
|
// if we do, we need to re-selector-match them here.
|
|
}
|
|
|
|
/* static */ void
|
|
RestyleManager::ClearServoDataFromSubtree(Element* aElement, IncludeRoot aIncludeRoot)
|
|
{
|
|
if (aElement->HasServoData()) {
|
|
StyleChildrenIterator it(aElement);
|
|
for (nsIContent* n = it.GetNextChild(); n; n = it.GetNextChild()) {
|
|
if (n->IsElement()) {
|
|
ClearServoDataFromSubtree(n->AsElement(), IncludeRoot::Yes);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (MOZ_LIKELY(aIncludeRoot == IncludeRoot::Yes)) {
|
|
aElement->ClearServoData();
|
|
MOZ_ASSERT(!aElement->HasAnyOfFlags(Element::kAllServoDescendantBits | NODE_NEEDS_FRAME));
|
|
MOZ_ASSERT(aElement != aElement->OwnerDoc()->GetServoRestyleRoot());
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
RestyleManager::ClearRestyleStateFromSubtree(Element* aElement)
|
|
{
|
|
if (aElement->HasAnyOfFlags(Element::kAllServoDescendantBits)) {
|
|
StyleChildrenIterator it(aElement);
|
|
for (nsIContent* n = it.GetNextChild(); n; n = it.GetNextChild()) {
|
|
if (n->IsElement()) {
|
|
ClearRestyleStateFromSubtree(n->AsElement());
|
|
}
|
|
}
|
|
}
|
|
|
|
bool wasRestyled;
|
|
Unused << Servo_TakeChangeHint(aElement, &wasRestyled);
|
|
aElement->UnsetFlags(Element::kAllServoDescendantBits);
|
|
}
|
|
|
|
/**
|
|
* This struct takes care of encapsulating some common state that text nodes may
|
|
* need to track during the post-traversal.
|
|
*
|
|
* This is currently used to properly compute change hints when the parent
|
|
* element of this node is a display: contents node, and also to avoid computing
|
|
* the style for text children more than once per element.
|
|
*/
|
|
struct RestyleManager::TextPostTraversalState
|
|
{
|
|
public:
|
|
TextPostTraversalState(Element& aParentElement,
|
|
ComputedStyle* aParentContext,
|
|
bool aDisplayContentsParentStyleChanged,
|
|
ServoRestyleState& aParentRestyleState)
|
|
: mParentElement(aParentElement)
|
|
, mParentContext(aParentContext)
|
|
, mParentRestyleState(aParentRestyleState)
|
|
, mStyle(nullptr)
|
|
, mShouldPostHints(aDisplayContentsParentStyleChanged)
|
|
, mShouldComputeHints(aDisplayContentsParentStyleChanged)
|
|
, mComputedHint(nsChangeHint_Empty)
|
|
{}
|
|
|
|
nsStyleChangeList& ChangeList() { return mParentRestyleState.ChangeList(); }
|
|
|
|
ComputedStyle& ComputeStyle(nsIContent* aTextNode)
|
|
{
|
|
if (!mStyle) {
|
|
mStyle = mParentRestyleState.StyleSet().ResolveStyleForText(
|
|
aTextNode, &ParentStyle());
|
|
}
|
|
MOZ_ASSERT(mStyle);
|
|
return *mStyle;
|
|
}
|
|
|
|
void ComputeHintIfNeeded(nsIContent* aContent,
|
|
nsIFrame* aTextFrame,
|
|
ComputedStyle& aNewStyle)
|
|
{
|
|
MOZ_ASSERT(aTextFrame);
|
|
MOZ_ASSERT(aNewStyle.GetPseudo() == nsCSSAnonBoxes::mozText);
|
|
|
|
if (MOZ_LIKELY(!mShouldPostHints)) {
|
|
return;
|
|
}
|
|
|
|
ComputedStyle* oldStyle = aTextFrame->Style();
|
|
MOZ_ASSERT(oldStyle->GetPseudo() == nsCSSAnonBoxes::mozText);
|
|
|
|
// We rely on the fact that all the text children for the same element share
|
|
// style to avoid recomputing style differences for all of them.
|
|
//
|
|
// TODO(emilio): The above may not be true for ::first-{line,letter}, but
|
|
// we'll cross that bridge when we support those in stylo.
|
|
if (mShouldComputeHints) {
|
|
mShouldComputeHints = false;
|
|
uint32_t equalStructs;
|
|
mComputedHint = oldStyle->CalcStyleDifference(&aNewStyle, &equalStructs);
|
|
mComputedHint = NS_RemoveSubsumedHints(
|
|
mComputedHint, mParentRestyleState.ChangesHandledFor(*aTextFrame));
|
|
}
|
|
|
|
if (mComputedHint) {
|
|
mParentRestyleState.ChangeList().AppendChange(
|
|
aTextFrame, aContent, mComputedHint);
|
|
}
|
|
}
|
|
|
|
private:
|
|
ComputedStyle& ParentStyle() {
|
|
if (!mParentContext) {
|
|
mLazilyResolvedParentContext =
|
|
mParentRestyleState.StyleSet().ResolveServoStyle(&mParentElement);
|
|
mParentContext = mLazilyResolvedParentContext;
|
|
}
|
|
return *mParentContext;
|
|
}
|
|
|
|
Element& mParentElement;
|
|
ComputedStyle* mParentContext;
|
|
RefPtr<ComputedStyle> mLazilyResolvedParentContext;
|
|
ServoRestyleState& mParentRestyleState;
|
|
RefPtr<ComputedStyle> mStyle;
|
|
bool mShouldPostHints;
|
|
bool mShouldComputeHints;
|
|
nsChangeHint mComputedHint;
|
|
};
|
|
|
|
static void
|
|
UpdateBackdropIfNeeded(nsIFrame* aFrame,
|
|
ServoStyleSet& aStyleSet,
|
|
nsStyleChangeList& aChangeList)
|
|
{
|
|
const nsStyleDisplay* display = aFrame->Style()->StyleDisplay();
|
|
if (display->mTopLayer != NS_STYLE_TOP_LAYER_TOP) {
|
|
return;
|
|
}
|
|
|
|
// Elements in the top layer are guaranteed to have absolute or fixed
|
|
// position per https://fullscreen.spec.whatwg.org/#new-stacking-layer.
|
|
MOZ_ASSERT(display->IsAbsolutelyPositionedStyle());
|
|
|
|
nsIFrame* backdropPlaceholder =
|
|
aFrame->GetChildList(nsIFrame::kBackdropList).FirstChild();
|
|
if (!backdropPlaceholder) {
|
|
return;
|
|
}
|
|
|
|
MOZ_ASSERT(backdropPlaceholder->IsPlaceholderFrame());
|
|
nsIFrame* backdropFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(backdropPlaceholder);
|
|
MOZ_ASSERT(backdropFrame->IsBackdropFrame());
|
|
MOZ_ASSERT(backdropFrame->Style()->GetPseudoType() ==
|
|
CSSPseudoElementType::backdrop);
|
|
|
|
RefPtr<ComputedStyle> newStyle =
|
|
aStyleSet.ResolvePseudoElementStyle(aFrame->GetContent()->AsElement(),
|
|
CSSPseudoElementType::backdrop,
|
|
aFrame->Style(),
|
|
/* aPseudoElement = */ nullptr);
|
|
|
|
// NOTE(emilio): We can't use the changes handled for the owner of the
|
|
// backdrop frame, since it's out of flow, and parented to the viewport or
|
|
// canvas frame (depending on the `position` value).
|
|
MOZ_ASSERT(backdropFrame->GetParent()->IsViewportFrame() ||
|
|
backdropFrame->GetParent()->IsCanvasFrame());
|
|
nsTArray<nsIFrame*> wrappersToRestyle;
|
|
ServoRestyleState state(aStyleSet, aChangeList, wrappersToRestyle);
|
|
nsIFrame::UpdateStyleOfOwnedChildFrame(backdropFrame, newStyle, state);
|
|
}
|
|
|
|
static void
|
|
UpdateFirstLetterIfNeeded(nsIFrame* aFrame, ServoRestyleState& aRestyleState)
|
|
{
|
|
MOZ_ASSERT(!aFrame->IsFrameOfType(nsIFrame::eBlockFrame),
|
|
"You're probably duplicating work with UpdatePseudoElementStyles!");
|
|
if (!aFrame->HasFirstLetterChild()) {
|
|
return;
|
|
}
|
|
|
|
// We need to find the block the first-letter is associated with so we can
|
|
// find the right element for the first-letter's style resolution. Might as
|
|
// well just delegate the whole thing to that block.
|
|
nsIFrame* block = aFrame->GetParent();
|
|
while (!block->IsFrameOfType(nsIFrame::eBlockFrame)) {
|
|
block = block->GetParent();
|
|
}
|
|
|
|
static_cast<nsBlockFrame*>(block->FirstContinuation())->
|
|
UpdateFirstLetterStyle(aRestyleState);
|
|
}
|
|
|
|
static void
|
|
UpdateOneAdditionalComputedStyle(nsIFrame* aFrame,
|
|
uint32_t aIndex,
|
|
ComputedStyle& aOldContext,
|
|
ServoRestyleState& aRestyleState)
|
|
{
|
|
auto pseudoType = aOldContext.GetPseudoType();
|
|
MOZ_ASSERT(pseudoType != CSSPseudoElementType::NotPseudo);
|
|
MOZ_ASSERT(
|
|
!nsCSSPseudoElements::PseudoElementSupportsUserActionState(pseudoType));
|
|
|
|
RefPtr<ComputedStyle> newStyle =
|
|
aRestyleState.StyleSet().ResolvePseudoElementStyle(
|
|
aFrame->GetContent()->AsElement(),
|
|
pseudoType,
|
|
aFrame->Style(),
|
|
/* aPseudoElement = */ nullptr);
|
|
|
|
uint32_t equalStructs; // Not used, actually.
|
|
nsChangeHint childHint =
|
|
aOldContext.CalcStyleDifference(newStyle, &equalStructs);
|
|
if (!aFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) {
|
|
childHint = NS_RemoveSubsumedHints(
|
|
childHint, aRestyleState.ChangesHandledFor(*aFrame));
|
|
}
|
|
|
|
if (childHint) {
|
|
if (childHint & nsChangeHint_ReconstructFrame) {
|
|
// If we generate a reconstruct here, remove any non-reconstruct hints we
|
|
// may have already generated for this content.
|
|
aRestyleState.ChangeList().PopChangesForContent(aFrame->GetContent());
|
|
}
|
|
aRestyleState.ChangeList().AppendChange(
|
|
aFrame, aFrame->GetContent(), childHint);
|
|
}
|
|
|
|
aFrame->SetAdditionalComputedStyle(aIndex, newStyle);
|
|
}
|
|
|
|
static void
|
|
UpdateAdditionalComputedStyles(nsIFrame* aFrame,
|
|
ServoRestyleState& aRestyleState)
|
|
{
|
|
MOZ_ASSERT(aFrame);
|
|
MOZ_ASSERT(aFrame->GetContent() && aFrame->GetContent()->IsElement());
|
|
|
|
// FIXME(emilio): Consider adding a bit or something to avoid the initial
|
|
// virtual call?
|
|
uint32_t index = 0;
|
|
while (auto* oldStyle = aFrame->GetAdditionalComputedStyle(index)) {
|
|
UpdateOneAdditionalComputedStyle(
|
|
aFrame, index++, *oldStyle, aRestyleState);
|
|
}
|
|
}
|
|
|
|
static void
|
|
UpdateFramePseudoElementStyles(nsIFrame* aFrame,
|
|
ServoRestyleState& aRestyleState)
|
|
{
|
|
if (aFrame->IsFrameOfType(nsIFrame::eBlockFrame)) {
|
|
static_cast<nsBlockFrame*>(aFrame)->UpdatePseudoElementStyles(aRestyleState);
|
|
} else {
|
|
UpdateFirstLetterIfNeeded(aFrame, aRestyleState);
|
|
}
|
|
|
|
UpdateBackdropIfNeeded(
|
|
aFrame, aRestyleState.StyleSet(), aRestyleState.ChangeList());
|
|
}
|
|
|
|
enum class ServoPostTraversalFlags : uint32_t
|
|
{
|
|
Empty = 0,
|
|
// Whether parent was restyled.
|
|
ParentWasRestyled = 1 << 0,
|
|
// Skip sending accessibility notifications for all descendants.
|
|
SkipA11yNotifications = 1 << 1,
|
|
// Always send accessibility notifications if the element is shown.
|
|
// The SkipA11yNotifications flag above overrides this flag.
|
|
SendA11yNotificationsIfShown = 1 << 2,
|
|
};
|
|
|
|
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(ServoPostTraversalFlags)
|
|
|
|
// Send proper accessibility notifications and return post traversal
|
|
// flags for kids.
|
|
static ServoPostTraversalFlags
|
|
SendA11yNotifications(nsPresContext* aPresContext,
|
|
Element* aElement,
|
|
ComputedStyle* aOldComputedStyle,
|
|
ComputedStyle* aNewComputedStyle,
|
|
ServoPostTraversalFlags aFlags)
|
|
{
|
|
using Flags = ServoPostTraversalFlags;
|
|
MOZ_ASSERT(!(aFlags & Flags::SkipA11yNotifications) ||
|
|
!(aFlags & Flags::SendA11yNotificationsIfShown),
|
|
"The two a11y flags should never be set together");
|
|
|
|
#ifdef ACCESSIBILITY
|
|
nsAccessibilityService* accService = GetAccService();
|
|
if (!accService) {
|
|
// If we don't have accessibility service, accessibility is not
|
|
// enabled. Just skip everything.
|
|
return Flags::Empty;
|
|
}
|
|
if (aFlags & Flags::SkipA11yNotifications) {
|
|
// Propogate the skipping flag to descendants.
|
|
return Flags::SkipA11yNotifications;
|
|
}
|
|
|
|
bool needsNotify = false;
|
|
bool isVisible = aNewComputedStyle->StyleVisibility()->IsVisible();
|
|
if (aFlags & Flags::SendA11yNotificationsIfShown) {
|
|
if (!isVisible) {
|
|
// Propagate the sending-if-shown flag to descendants.
|
|
return Flags::SendA11yNotificationsIfShown;
|
|
}
|
|
// We have asked accessibility service to remove the whole subtree
|
|
// of element which becomes invisible from the accessible tree, but
|
|
// this element is visible, so we need to add it back.
|
|
needsNotify = true;
|
|
} else {
|
|
// If we shouldn't skip in any case, we need to check whether our
|
|
// own visibility has changed.
|
|
bool wasVisible = aOldComputedStyle->StyleVisibility()->IsVisible();
|
|
needsNotify = wasVisible != isVisible;
|
|
}
|
|
|
|
if (needsNotify) {
|
|
nsIPresShell* presShell = aPresContext->PresShell();
|
|
if (isVisible) {
|
|
accService->ContentRangeInserted(
|
|
presShell, aElement, aElement->GetNextSibling());
|
|
// We are adding the subtree. Accessibility service would handle
|
|
// descendants, so we should just skip them from notifying.
|
|
return Flags::SkipA11yNotifications;
|
|
}
|
|
// Remove the subtree of this invisible element, and ask any shown
|
|
// descendant to add themselves back.
|
|
accService->ContentRemoved(presShell, aElement);
|
|
return Flags::SendA11yNotificationsIfShown;
|
|
}
|
|
#endif
|
|
|
|
return Flags::Empty;
|
|
}
|
|
|
|
bool
|
|
RestyleManager::ProcessPostTraversal(
|
|
Element* aElement,
|
|
ComputedStyle* aParentContext,
|
|
ServoRestyleState& aRestyleState,
|
|
ServoPostTraversalFlags aFlags)
|
|
{
|
|
nsIFrame* styleFrame = nsLayoutUtils::GetStyleFrame(aElement);
|
|
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
|
|
|
|
MOZ_DIAGNOSTIC_ASSERT(aElement->HasServoData(),
|
|
"Element without Servo data on a post-traversal? How?");
|
|
|
|
// NOTE(emilio): This is needed because for table frames the bit is set on the
|
|
// table wrapper (which is the primary frame), not on the table itself.
|
|
const bool isOutOfFlow =
|
|
primaryFrame &&
|
|
primaryFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW);
|
|
|
|
// Grab the change hint from Servo.
|
|
bool wasRestyled;
|
|
nsChangeHint changeHint =
|
|
static_cast<nsChangeHint>(Servo_TakeChangeHint(aElement, &wasRestyled));
|
|
|
|
// We should really fix the weird primary frame mapping for image maps
|
|
// (bug 135040)...
|
|
if (styleFrame && styleFrame->GetContent() != aElement) {
|
|
MOZ_ASSERT(static_cast<nsImageFrame*>(do_QueryFrame(styleFrame)));
|
|
styleFrame = nullptr;
|
|
}
|
|
|
|
// Handle lazy frame construction by posting a reconstruct for any lazily-
|
|
// constructed roots.
|
|
if (aElement->HasFlag(NODE_NEEDS_FRAME)) {
|
|
changeHint |= nsChangeHint_ReconstructFrame;
|
|
MOZ_ASSERT(!styleFrame);
|
|
}
|
|
|
|
if (styleFrame) {
|
|
MOZ_ASSERT(primaryFrame);
|
|
|
|
nsIFrame* maybeAnonBoxChild;
|
|
if (isOutOfFlow) {
|
|
maybeAnonBoxChild = primaryFrame->GetPlaceholderFrame();
|
|
} else {
|
|
maybeAnonBoxChild = primaryFrame;
|
|
changeHint = NS_RemoveSubsumedHints(
|
|
changeHint, aRestyleState.ChangesHandledFor(*styleFrame));
|
|
}
|
|
|
|
// If the parent wasn't restyled, the styles of our anon box parents won't
|
|
// change either.
|
|
if ((aFlags & ServoPostTraversalFlags::ParentWasRestyled) &&
|
|
maybeAnonBoxChild->ParentIsWrapperAnonBox()) {
|
|
aRestyleState.AddPendingWrapperRestyle(
|
|
ServoRestyleState::TableAwareParentFor(maybeAnonBoxChild));
|
|
}
|
|
}
|
|
|
|
// Although we shouldn't generate non-ReconstructFrame hints for elements with
|
|
// no frames, we can still get them here if they were explicitly posted by
|
|
// PostRestyleEvent, such as a RepaintFrame hint when a :link changes to be
|
|
// :visited. Skip processing these hints if there is no frame.
|
|
if ((styleFrame || (changeHint & nsChangeHint_ReconstructFrame)) && changeHint) {
|
|
aRestyleState.ChangeList().AppendChange(styleFrame, aElement, changeHint);
|
|
}
|
|
|
|
// If our change hint is reconstruct, we delegate to the frame constructor,
|
|
// which consumes the new style and expects the old style to be on the frame.
|
|
//
|
|
// XXXbholley: We should teach the frame constructor how to clear the dirty
|
|
// descendants bit to avoid the traversal here.
|
|
if (changeHint & nsChangeHint_ReconstructFrame) {
|
|
ClearRestyleStateFromSubtree(aElement);
|
|
return true;
|
|
}
|
|
|
|
// TODO(emilio): We could avoid some refcount traffic here, specially in the
|
|
// ComputedStyle case, which uses atomic refcounting.
|
|
//
|
|
// Hold the ComputedStyle alive, because it could become a dangling pointer
|
|
// during the replacement. In practice it's not a huge deal, but better not
|
|
// playing with dangling pointers if not needed.
|
|
//
|
|
// NOTE(emilio): We could keep around the old computed style for display:
|
|
// contents elements too, but we don't really need it right now.
|
|
RefPtr<ComputedStyle> oldOrDisplayContentsStyle =
|
|
styleFrame ? styleFrame->Style() : nullptr;
|
|
|
|
MOZ_ASSERT(!(styleFrame && Servo_Element_IsDisplayContents(aElement)),
|
|
"display: contents node has a frame, yet we didn't reframe it"
|
|
" above?");
|
|
const bool isDisplayContents =
|
|
!styleFrame && Servo_Element_IsDisplayContents(aElement);
|
|
if (isDisplayContents) {
|
|
oldOrDisplayContentsStyle =
|
|
aRestyleState.StyleSet().ResolveServoStyle(aElement);
|
|
}
|
|
|
|
Maybe<ServoRestyleState> thisFrameRestyleState;
|
|
if (styleFrame) {
|
|
auto type = isOutOfFlow
|
|
? ServoRestyleState::Type::OutOfFlow
|
|
: ServoRestyleState::Type::InFlow;
|
|
|
|
thisFrameRestyleState.emplace(*styleFrame, aRestyleState, changeHint, type);
|
|
}
|
|
|
|
// We can't really assume as used changes from display: contents elements (or
|
|
// other elements without frames).
|
|
ServoRestyleState& childrenRestyleState =
|
|
thisFrameRestyleState ? *thisFrameRestyleState : aRestyleState;
|
|
|
|
RefPtr<ComputedStyle> upToDateContext =
|
|
wasRestyled
|
|
? aRestyleState.StyleSet().ResolveServoStyle(aElement)
|
|
: oldOrDisplayContentsStyle;
|
|
|
|
ServoPostTraversalFlags childrenFlags =
|
|
wasRestyled ? ServoPostTraversalFlags::ParentWasRestyled
|
|
: ServoPostTraversalFlags::Empty;
|
|
|
|
if (wasRestyled && oldOrDisplayContentsStyle) {
|
|
MOZ_ASSERT(styleFrame || isDisplayContents);
|
|
|
|
// Note that upToDateContext could be the same as oldOrDisplayContentsStyle,
|
|
// but it doesn't matter, since the only point of it is calling FinishStyle
|
|
// on the relevant structs, and those don't matter for display: contents.
|
|
upToDateContext->ResolveSameStructsAs(oldOrDisplayContentsStyle);
|
|
|
|
// We want to walk all the continuations here, even the ones with different
|
|
// styles. In practice, the only reason we get continuations with different
|
|
// styles here is ::first-line (::first-letter never affects element
|
|
// styles). But in that case, newStyle is the right context for the
|
|
// _later_ continuations anyway (the ones not affected by ::first-line), not
|
|
// the earlier ones, so there is no point stopping right at the point when
|
|
// we'd actually be setting the right ComputedStyle.
|
|
//
|
|
// This does mean that we may be setting the wrong ComputedStyle on our
|
|
// initial continuations; ::first-line fixes that up after the fact.
|
|
for (nsIFrame* f = styleFrame; f; f = f->GetNextContinuation()) {
|
|
MOZ_ASSERT_IF(f != styleFrame, !f->GetAdditionalComputedStyle(0));
|
|
f->SetComputedStyle(upToDateContext);
|
|
}
|
|
|
|
if (styleFrame) {
|
|
UpdateAdditionalComputedStyles(styleFrame, aRestyleState);
|
|
}
|
|
|
|
if (!aElement->GetParent()) {
|
|
// This is the root. Update styles on the viewport as needed.
|
|
ViewportFrame* viewport =
|
|
do_QueryFrame(mPresContext->PresShell()->GetRootFrame());
|
|
if (viewport) {
|
|
// NB: The root restyle state, not the one for our children!
|
|
viewport->UpdateStyle(aRestyleState);
|
|
}
|
|
}
|
|
|
|
// Some changes to animations don't affect the computed style and yet still
|
|
// require the layer to be updated. For example, pausing an animation via
|
|
// the Web Animations API won't affect an element's style but still
|
|
// requires to update the animation on the layer.
|
|
//
|
|
// We can sometimes reach this when the animated style is being removed.
|
|
// Since AddLayerChangesForAnimation checks if |styleFrame| has a transform
|
|
// style or not, we need to call it *after* setting |newStyle| to
|
|
// |styleFrame| to ensure the animated transform has been removed first.
|
|
AddLayerChangesForAnimation(
|
|
styleFrame, aElement, aRestyleState.ChangeList());
|
|
|
|
childrenFlags |= SendA11yNotifications(mPresContext,
|
|
aElement,
|
|
oldOrDisplayContentsStyle,
|
|
upToDateContext,
|
|
aFlags);
|
|
}
|
|
|
|
const bool traverseElementChildren =
|
|
aElement->HasAnyOfFlags(Element::kAllServoDescendantBits);
|
|
const bool traverseTextChildren =
|
|
wasRestyled || aElement->HasFlag(NODE_DESCENDANTS_NEED_FRAMES);
|
|
bool recreatedAnyContext = wasRestyled;
|
|
if (traverseElementChildren || traverseTextChildren) {
|
|
StyleChildrenIterator it(aElement);
|
|
TextPostTraversalState textState(*aElement,
|
|
upToDateContext,
|
|
isDisplayContents && wasRestyled,
|
|
childrenRestyleState);
|
|
for (nsIContent* n = it.GetNextChild(); n; n = it.GetNextChild()) {
|
|
if (traverseElementChildren && n->IsElement()) {
|
|
recreatedAnyContext |= ProcessPostTraversal(n->AsElement(),
|
|
upToDateContext,
|
|
childrenRestyleState,
|
|
childrenFlags);
|
|
} else if (traverseTextChildren && n->IsText()) {
|
|
recreatedAnyContext |= ProcessPostTraversalForText(n, textState,
|
|
childrenRestyleState,
|
|
childrenFlags);
|
|
}
|
|
}
|
|
}
|
|
|
|
// We want to update frame pseudo-element styles after we've traversed our
|
|
// kids, because some of those updates (::first-line/::first-letter) need to
|
|
// modify the styles of the kids, and the child traversal above would just
|
|
// clobber those modifications.
|
|
if (styleFrame) {
|
|
if (wasRestyled) {
|
|
// Make sure to update anon boxes and pseudo bits after updating text,
|
|
// otherwise ProcessPostTraversalForText could clobber first-letter
|
|
// styles, for example.
|
|
styleFrame->UpdateStyleOfOwnedAnonBoxes(childrenRestyleState);
|
|
}
|
|
// Process anon box wrapper frames before ::first-line bits, but _after_
|
|
// owned anon boxes, since the children wrapper anon boxes could be
|
|
// inheriting from our own owned anon boxes.
|
|
childrenRestyleState.ProcessWrapperRestyles(styleFrame);
|
|
if (wasRestyled) {
|
|
UpdateFramePseudoElementStyles(styleFrame, childrenRestyleState);
|
|
} else if (traverseElementChildren &&
|
|
styleFrame->IsFrameOfType(nsIFrame::eBlockFrame)) {
|
|
// Even if we were not restyled, if we're a block with a first-line and
|
|
// one of our descendant elements which is on the first line was restyled,
|
|
// we need to update the styles of things on the first line, because
|
|
// they're wrong now.
|
|
//
|
|
// FIXME(bz) Could we do better here? For example, could we keep track of
|
|
// frames that are "block with a ::first-line so we could avoid
|
|
// IsFrameOfType() and digging about for the first-line frame if not?
|
|
// Could we keep track of whether the element children we actually restyle
|
|
// are affected by first-line? Something else? Bug 1385443 tracks making
|
|
// this better.
|
|
nsIFrame* firstLineFrame =
|
|
static_cast<nsBlockFrame*>(styleFrame)->GetFirstLineFrame();
|
|
if (firstLineFrame) {
|
|
for (nsIFrame* kid : firstLineFrame->PrincipalChildList()) {
|
|
ReparentComputedStyleForFirstLine(kid);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
aElement->UnsetFlags(Element::kAllServoDescendantBits);
|
|
return recreatedAnyContext;
|
|
}
|
|
|
|
bool
|
|
RestyleManager::ProcessPostTraversalForText(
|
|
nsIContent* aTextNode,
|
|
TextPostTraversalState& aPostTraversalState,
|
|
ServoRestyleState& aRestyleState,
|
|
ServoPostTraversalFlags aFlags)
|
|
{
|
|
// Handle lazy frame construction.
|
|
if (aTextNode->HasFlag(NODE_NEEDS_FRAME)) {
|
|
aPostTraversalState.ChangeList().AppendChange(
|
|
nullptr, aTextNode, nsChangeHint_ReconstructFrame);
|
|
return true;
|
|
}
|
|
|
|
// Handle restyle.
|
|
nsIFrame* primaryFrame = aTextNode->GetPrimaryFrame();
|
|
if (!primaryFrame) {
|
|
return false;
|
|
}
|
|
|
|
// If the parent wasn't restyled, the styles of our anon box parents won't
|
|
// change either.
|
|
if ((aFlags & ServoPostTraversalFlags::ParentWasRestyled) &&
|
|
primaryFrame->ParentIsWrapperAnonBox()) {
|
|
aRestyleState.AddPendingWrapperRestyle(
|
|
ServoRestyleState::TableAwareParentFor(primaryFrame));
|
|
}
|
|
|
|
ComputedStyle& newStyle = aPostTraversalState.ComputeStyle(aTextNode);
|
|
aPostTraversalState.ComputeHintIfNeeded(aTextNode, primaryFrame, newStyle);
|
|
|
|
// We want to walk all the continuations here, even the ones with different
|
|
// styles. In practice, the only reasons we get continuations with different
|
|
// styles are ::first-line and ::first-letter. But in those cases,
|
|
// newStyle is the right context for the _later_ continuations anyway (the
|
|
// ones not affected by ::first-line/::first-letter), not the earlier ones,
|
|
// so there is no point stopping right at the point when we'd actually be
|
|
// setting the right ComputedStyle.
|
|
//
|
|
// This does mean that we may be setting the wrong ComputedStyle on our
|
|
// initial continuations; ::first-line/::first-letter fix that up after the
|
|
// fact.
|
|
for (nsIFrame* f = primaryFrame; f; f = f->GetNextContinuation()) {
|
|
f->SetComputedStyle(&newStyle);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
RestyleManager::ClearSnapshots()
|
|
{
|
|
for (auto iter = mSnapshots.Iter(); !iter.Done(); iter.Next()) {
|
|
iter.Key()->UnsetFlags(ELEMENT_HAS_SNAPSHOT | ELEMENT_HANDLED_SNAPSHOT);
|
|
iter.Remove();
|
|
}
|
|
}
|
|
|
|
ServoElementSnapshot&
|
|
RestyleManager::SnapshotFor(Element* aElement)
|
|
{
|
|
MOZ_ASSERT(!mInStyleRefresh);
|
|
|
|
// NOTE(emilio): We can handle snapshots from a one-off restyle of those that
|
|
// we do to restyle stuff for reconstruction, for example.
|
|
//
|
|
// It seems to be the case that we always flush in between that happens and
|
|
// the next attribute change, so we can assert that we haven't handled the
|
|
// snapshot here yet. If this assertion didn't hold, we'd need to unset that
|
|
// flag from here too.
|
|
//
|
|
// Can't wait to make ProcessPendingRestyles the only entry-point for styling,
|
|
// so this becomes much easier to reason about. Today is not that day though.
|
|
MOZ_ASSERT(aElement->HasServoData());
|
|
MOZ_ASSERT(!aElement->HasFlag(ELEMENT_HANDLED_SNAPSHOT));
|
|
|
|
ServoElementSnapshot* snapshot = mSnapshots.LookupOrAdd(aElement, aElement);
|
|
aElement->SetFlags(ELEMENT_HAS_SNAPSHOT);
|
|
|
|
// Now that we have a snapshot, make sure a restyle is triggered.
|
|
aElement->NoteDirtyForServo();
|
|
return *snapshot;
|
|
}
|
|
|
|
void
|
|
RestyleManager::DoProcessPendingRestyles(ServoTraversalFlags aFlags)
|
|
{
|
|
nsPresContext* presContext = PresContext();
|
|
|
|
MOZ_ASSERT(presContext->Document(), "No document? Pshaw!");
|
|
// FIXME(emilio): In the "flush animations" case, ideally, we should only
|
|
// recascade animation styles running on the compositor, so we shouldn't care
|
|
// about other styles, or new rules that apply to the page...
|
|
//
|
|
// However, that's not true as of right now, see bug 1388031 and bug 1388692.
|
|
MOZ_ASSERT((aFlags & ServoTraversalFlags::FlushThrottledAnimations) ||
|
|
!presContext->HasPendingMediaQueryUpdates(),
|
|
"Someone forgot to update media queries?");
|
|
MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(), "Missing a script blocker!");
|
|
MOZ_ASSERT(!mInStyleRefresh, "Reentrant call?");
|
|
|
|
|
|
if (MOZ_UNLIKELY(!presContext->PresShell()->DidInitialize())) {
|
|
// PresShell::FlushPendingNotifications doesn't early-return in the case
|
|
// where the PresShell hasn't yet been initialized (and therefore we haven't
|
|
// yet done the initial style traversal of the DOM tree). We should arguably
|
|
// fix up the callers and assert against this case, but we just detect and
|
|
// handle it for now.
|
|
return;
|
|
}
|
|
|
|
// Create a AnimationsWithDestroyedFrame during restyling process to
|
|
// stop animations and transitions on elements that have no frame at the end
|
|
// of the restyling process.
|
|
AnimationsWithDestroyedFrame animationsWithDestroyedFrame(this);
|
|
|
|
ServoStyleSet* styleSet = StyleSet();
|
|
nsIDocument* doc = presContext->Document();
|
|
|
|
// Ensure the refresh driver is active during traversal to avoid mutating
|
|
// mActiveTimer and mMostRecentRefresh time.
|
|
presContext->RefreshDriver()->MostRecentRefresh();
|
|
|
|
|
|
// Perform the Servo traversal, and the post-traversal if required. We do this
|
|
// in a loop because certain rare paths in the frame constructor (like
|
|
// uninstalling XBL bindings) can trigger additional style validations.
|
|
mInStyleRefresh = true;
|
|
if (mHaveNonAnimationRestyles) {
|
|
++mAnimationGeneration;
|
|
}
|
|
|
|
if (mRestyleForCSSRuleChanges) {
|
|
aFlags |= ServoTraversalFlags::ForCSSRuleChanges;
|
|
}
|
|
|
|
while (styleSet->StyleDocument(aFlags)) {
|
|
ClearSnapshots();
|
|
|
|
nsStyleChangeList currentChanges;
|
|
bool anyStyleChanged = false;
|
|
|
|
// Recreate styles , and queue up change hints (which also handle lazy frame
|
|
// construction).
|
|
{
|
|
AutoRestyleTimelineMarker marker(presContext->GetDocShell(), false);
|
|
DocumentStyleRootIterator iter(doc->GetServoRestyleRoot());
|
|
while (Element* root = iter.GetNextStyleRoot()) {
|
|
nsTArray<nsIFrame*> wrappersToRestyle;
|
|
ServoRestyleState state(*styleSet, currentChanges, wrappersToRestyle);
|
|
ServoPostTraversalFlags flags = ServoPostTraversalFlags::Empty;
|
|
anyStyleChanged |= ProcessPostTraversal(root, nullptr, state, flags);
|
|
}
|
|
}
|
|
|
|
doc->ClearServoRestyleRoot();
|
|
|
|
// Process the change hints.
|
|
//
|
|
// Unfortunately, the frame constructor can generate new change hints while
|
|
// processing existing ones. We redirect those into a secondary queue and
|
|
// iterate until there's nothing left.
|
|
{
|
|
AutoTimelineMarker marker(
|
|
presContext->GetDocShell(), "StylesApplyChanges");
|
|
ReentrantChangeList newChanges;
|
|
mReentrantChanges = &newChanges;
|
|
while (!currentChanges.IsEmpty()) {
|
|
ProcessRestyledFrames(currentChanges);
|
|
MOZ_ASSERT(currentChanges.IsEmpty());
|
|
for (ReentrantChange& change: newChanges) {
|
|
if (!(change.mHint & nsChangeHint_ReconstructFrame) &&
|
|
!change.mContent->GetPrimaryFrame()) {
|
|
// SVG Elements post change hints without ensuring that the primary
|
|
// frame will be there after that (see bug 1366142).
|
|
//
|
|
// Just ignore those, since we can't really process them.
|
|
continue;
|
|
}
|
|
currentChanges.AppendChange(change.mContent->GetPrimaryFrame(),
|
|
change.mContent, change.mHint);
|
|
}
|
|
newChanges.Clear();
|
|
}
|
|
mReentrantChanges = nullptr;
|
|
}
|
|
|
|
if (anyStyleChanged) {
|
|
// Maybe no styles changed when:
|
|
//
|
|
// * Only explicit change hints were posted in the first place.
|
|
// * When an attribute or state change in the content happens not to need
|
|
// a restyle after all.
|
|
//
|
|
// In any case, we don't need to increment the restyle generation in that
|
|
// case.
|
|
IncrementRestyleGeneration();
|
|
}
|
|
}
|
|
|
|
doc->ClearServoRestyleRoot();
|
|
|
|
FlushOverflowChangedTracker();
|
|
|
|
ClearSnapshots();
|
|
styleSet->AssertTreeIsClean();
|
|
mHaveNonAnimationRestyles = false;
|
|
mRestyleForCSSRuleChanges = false;
|
|
mInStyleRefresh = false;
|
|
|
|
// Now that everything has settled, see if we have enough free rule nodes in
|
|
// the tree to warrant sweeping them.
|
|
styleSet->MaybeGCRuleTree();
|
|
|
|
// Note: We are in the scope of |animationsWithDestroyedFrame|, so
|
|
// |mAnimationsWithDestroyedFrame| is still valid.
|
|
MOZ_ASSERT(mAnimationsWithDestroyedFrame);
|
|
mAnimationsWithDestroyedFrame->StopAnimationsForElementsWithoutFrames();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
VerifyFlatTree(const nsIContent& aContent)
|
|
{
|
|
StyleChildrenIterator iter(&aContent);
|
|
|
|
for (auto* content = iter.GetNextChild();
|
|
content;
|
|
content = iter.GetNextChild()) {
|
|
MOZ_ASSERT(content->GetFlattenedTreeParentNodeForStyle() == &aContent);
|
|
MOZ_ASSERT(!content->IsActiveChildrenElement());
|
|
VerifyFlatTree(*content);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
RestyleManager::ProcessPendingRestyles()
|
|
{
|
|
#ifdef DEBUG
|
|
if (auto* root = mPresContext->Document()->GetRootElement()) {
|
|
VerifyFlatTree(*root);
|
|
}
|
|
#endif
|
|
|
|
DoProcessPendingRestyles(ServoTraversalFlags::Empty);
|
|
}
|
|
|
|
void
|
|
RestyleManager::ProcessAllPendingAttributeAndStateInvalidations()
|
|
{
|
|
if (mSnapshots.IsEmpty()) {
|
|
return;
|
|
}
|
|
for (auto iter = mSnapshots.Iter(); !iter.Done(); iter.Next()) {
|
|
// Servo data for the element might have been dropped. (e.g. by removing
|
|
// from its document)
|
|
if (iter.Key()->HasFlag(ELEMENT_HAS_SNAPSHOT)) {
|
|
Servo_ProcessInvalidations(StyleSet()->RawSet(), iter.Key(), &mSnapshots);
|
|
}
|
|
}
|
|
ClearSnapshots();
|
|
}
|
|
|
|
bool
|
|
RestyleManager::HasPendingRestyleAncestor(Element* aElement) const
|
|
{
|
|
return Servo_HasPendingRestyleAncestor(aElement);
|
|
}
|
|
|
|
void
|
|
RestyleManager::UpdateOnlyAnimationStyles()
|
|
{
|
|
bool doCSS = PresContext()->EffectCompositor()->HasPendingStyleUpdates();
|
|
if (!doCSS) {
|
|
return;
|
|
}
|
|
|
|
DoProcessPendingRestyles(ServoTraversalFlags::FlushThrottledAnimations);
|
|
}
|
|
|
|
void
|
|
RestyleManager::ContentStateChanged(nsIContent* aContent,
|
|
EventStates aChangedBits)
|
|
{
|
|
MOZ_ASSERT(!mInStyleRefresh);
|
|
|
|
if (!aContent->IsElement()) {
|
|
return;
|
|
}
|
|
|
|
Element* aElement = aContent->AsElement();
|
|
if (!aElement->HasServoData()) {
|
|
return;
|
|
}
|
|
|
|
nsChangeHint changeHint;
|
|
ContentStateChangedInternal(aElement, aChangedBits, &changeHint);
|
|
|
|
// Don't bother taking a snapshot if no rules depend on these state bits.
|
|
//
|
|
// We always take a snapshot for the LTR/RTL event states, since Servo doesn't
|
|
// track those bits in the same way, and we know that :dir() rules are always
|
|
// present in UA style sheets.
|
|
if (!aChangedBits.HasAtLeastOneOfStates(DIRECTION_STATES) &&
|
|
!StyleSet()->HasStateDependency(*aElement, aChangedBits)) {
|
|
return;
|
|
}
|
|
|
|
ServoElementSnapshot& snapshot = SnapshotFor(aElement);
|
|
EventStates previousState = aElement->StyleState() ^ aChangedBits;
|
|
snapshot.AddState(previousState);
|
|
|
|
if (changeHint) {
|
|
Servo_NoteExplicitHints(aElement, nsRestyleHint(0), changeHint);
|
|
}
|
|
|
|
// Assuming we need to invalidate cached style in getComputedStyle for
|
|
// undisplayed elements, since we don't know if it is needed.
|
|
IncrementUndisplayedRestyleGeneration();
|
|
}
|
|
|
|
static inline bool
|
|
AttributeInfluencesOtherPseudoClassState(const Element& aElement,
|
|
const nsAtom* aAttribute)
|
|
{
|
|
// We must record some state for :-moz-browser-frame and
|
|
// :-moz-table-border-nonzero.
|
|
if (aAttribute == nsGkAtoms::mozbrowser) {
|
|
return aElement.IsAnyOfHTMLElements(nsGkAtoms::iframe, nsGkAtoms::frame);
|
|
}
|
|
|
|
if (aAttribute == nsGkAtoms::border) {
|
|
return aElement.IsHTMLElement(nsGkAtoms::table);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static inline bool
|
|
NeedToRecordAttrChange(const ServoStyleSet& aStyleSet,
|
|
const Element& aElement,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute,
|
|
bool* aInfluencesOtherPseudoClassState)
|
|
{
|
|
*aInfluencesOtherPseudoClassState =
|
|
AttributeInfluencesOtherPseudoClassState(aElement, aAttribute);
|
|
|
|
// If the attribute influences one of the pseudo-classes that are backed by
|
|
// attributes, we just record it.
|
|
if (*aInfluencesOtherPseudoClassState) {
|
|
return true;
|
|
}
|
|
|
|
// We assume that id and class attributes are used in class/id selectors, and
|
|
// thus record them.
|
|
//
|
|
// TODO(emilio): We keep a filter of the ids in use somewhere in the StyleSet,
|
|
// presumably we could try to filter the old and new id, but it's not clear
|
|
// it's worth it.
|
|
if (aNameSpaceID == kNameSpaceID_None &&
|
|
(aAttribute == nsGkAtoms::id || aAttribute == nsGkAtoms::_class)) {
|
|
return true;
|
|
}
|
|
|
|
// We always record lang="", even though we force a subtree restyle when it
|
|
// changes, since it can change how its siblings match :lang(..) due to
|
|
// selectors like :lang(..) + div.
|
|
if (aAttribute == nsGkAtoms::lang) {
|
|
return true;
|
|
}
|
|
|
|
// Otherwise, just record the attribute change if a selector in the page may
|
|
// reference it from an attribute selector.
|
|
return aStyleSet.MightHaveAttributeDependency(aElement, aAttribute);
|
|
}
|
|
|
|
void
|
|
RestyleManager::AttributeWillChange(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute,
|
|
int32_t aModType,
|
|
const nsAttrValue* aNewValue)
|
|
{
|
|
TakeSnapshotForAttributeChange(aElement, aNameSpaceID, aAttribute);
|
|
}
|
|
|
|
void
|
|
RestyleManager::ClassAttributeWillBeChangedBySMIL(Element* aElement)
|
|
{
|
|
TakeSnapshotForAttributeChange(aElement, kNameSpaceID_None,
|
|
nsGkAtoms::_class);
|
|
}
|
|
|
|
void
|
|
RestyleManager::TakeSnapshotForAttributeChange(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute)
|
|
{
|
|
MOZ_ASSERT(!mInStyleRefresh);
|
|
|
|
if (!aElement->HasServoData()) {
|
|
return;
|
|
}
|
|
|
|
bool influencesOtherPseudoClassState;
|
|
if (!NeedToRecordAttrChange(*StyleSet(),
|
|
*aElement,
|
|
aNameSpaceID,
|
|
aAttribute,
|
|
&influencesOtherPseudoClassState)) {
|
|
return;
|
|
}
|
|
|
|
// We cannot tell if the attribute change will affect the styles of
|
|
// undisplayed elements, because we don't actually restyle those elements
|
|
// during the restyle traversal. So just assume that the attribute change can
|
|
// cause the style to change.
|
|
IncrementUndisplayedRestyleGeneration();
|
|
|
|
// Some other random attribute changes may also affect the transitions,
|
|
// so we also set this true here.
|
|
mHaveNonAnimationRestyles = true;
|
|
|
|
ServoElementSnapshot& snapshot = SnapshotFor(aElement);
|
|
snapshot.AddAttrs(aElement, aNameSpaceID, aAttribute);
|
|
|
|
if (influencesOtherPseudoClassState) {
|
|
snapshot.AddOtherPseudoClassState(aElement);
|
|
}
|
|
}
|
|
|
|
// For some attribute changes we must restyle the whole subtree:
|
|
//
|
|
// * <td> is affected by the cellpadding on its ancestor table
|
|
// * lwtheme and lwthemetextcolor on root element of XUL document
|
|
// affects all descendants due to :-moz-lwtheme* pseudo-classes
|
|
// * lang="" and xml:lang="" can affect all descendants due to :lang()
|
|
//
|
|
static inline bool
|
|
AttributeChangeRequiresSubtreeRestyle(const Element& aElement, nsAtom* aAttr)
|
|
{
|
|
if (aAttr == nsGkAtoms::cellpadding) {
|
|
return aElement.IsHTMLElement(nsGkAtoms::table);
|
|
}
|
|
if (aAttr == nsGkAtoms::lwtheme ||
|
|
aAttr == nsGkAtoms::lwthemetextcolor) {
|
|
return aElement.GetNameSpaceID() == kNameSpaceID_XUL &&
|
|
&aElement == aElement.OwnerDoc()->GetRootElement();
|
|
}
|
|
|
|
return aAttr == nsGkAtoms::lang;
|
|
}
|
|
|
|
void
|
|
RestyleManager::AttributeChanged(Element* aElement,
|
|
int32_t aNameSpaceID,
|
|
nsAtom* aAttribute,
|
|
int32_t aModType,
|
|
const nsAttrValue* aOldValue)
|
|
{
|
|
MOZ_ASSERT(!mInStyleRefresh);
|
|
|
|
auto changeHint = nsChangeHint(0);
|
|
auto restyleHint = nsRestyleHint(0);
|
|
|
|
changeHint |= aElement->GetAttributeChangeHint(aAttribute, aModType);
|
|
|
|
if (aAttribute == nsGkAtoms::style) {
|
|
restyleHint |= eRestyle_StyleAttribute;
|
|
} else if (AttributeChangeRequiresSubtreeRestyle(*aElement, aAttribute)) {
|
|
restyleHint |= eRestyle_Subtree;
|
|
} else if (aElement->IsAttributeMapped(aAttribute)) {
|
|
restyleHint |= eRestyle_Self;
|
|
}
|
|
|
|
if (nsIFrame* primaryFrame = aElement->GetPrimaryFrame()) {
|
|
// See if we have appearance information for a theme.
|
|
const nsStyleDisplay* disp = primaryFrame->StyleDisplay();
|
|
if (disp->mAppearance) {
|
|
nsITheme* theme = PresContext()->GetTheme();
|
|
if (theme && theme->ThemeSupportsWidget(PresContext(), primaryFrame,
|
|
disp->mAppearance)) {
|
|
bool repaint = false;
|
|
theme->WidgetStateChanged(primaryFrame, disp->mAppearance,
|
|
aAttribute, &repaint, aOldValue);
|
|
if (repaint) {
|
|
changeHint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
}
|
|
}
|
|
|
|
primaryFrame->AttributeChanged(aNameSpaceID, aAttribute, aModType);
|
|
}
|
|
|
|
if (restyleHint || changeHint) {
|
|
Servo_NoteExplicitHints(aElement, restyleHint, changeHint);
|
|
}
|
|
|
|
if (restyleHint) {
|
|
// Assuming we need to invalidate cached style in getComputedStyle for
|
|
// undisplayed elements, since we don't know if it is needed.
|
|
IncrementUndisplayedRestyleGeneration();
|
|
|
|
// If we change attributes, we have to mark this to be true, so we will
|
|
// increase the animation generation for the new created transition if any.
|
|
mHaveNonAnimationRestyles = true;
|
|
}
|
|
}
|
|
|
|
void
|
|
RestyleManager::ReparentComputedStyleForFirstLine(nsIFrame* aFrame)
|
|
{
|
|
// This is only called when moving frames in or out of the first-line
|
|
// pseudo-element (or one of its descendants). We can't say much about
|
|
// aFrame's ancestors, unfortunately (e.g. during a dynamic insert into
|
|
// something inside an inline-block on the first line the ancestors could be
|
|
// totally arbitrary), but we will definitely find a line frame on the
|
|
// ancestor chain. Note that the lineframe may not actually be the one that
|
|
// corresponds to ::first-line; when we're moving _out_ of the ::first-line it
|
|
// will be one of the continuations instead.
|
|
#ifdef DEBUG
|
|
{
|
|
nsIFrame* f = aFrame->GetParent();
|
|
while (f && !f->IsLineFrame()) {
|
|
f = f->GetParent();
|
|
}
|
|
MOZ_ASSERT(f, "Must have found a first-line frame");
|
|
}
|
|
#endif
|
|
|
|
DoReparentComputedStyleForFirstLine(aFrame, *StyleSet());
|
|
}
|
|
|
|
void
|
|
RestyleManager::DoReparentComputedStyleForFirstLine(nsIFrame* aFrame,
|
|
ServoStyleSet& aStyleSet)
|
|
{
|
|
if (aFrame->IsBackdropFrame()) {
|
|
// Style context of backdrop frame has no parent style, and thus we do not
|
|
// need to reparent it.
|
|
return;
|
|
}
|
|
|
|
if (aFrame->IsPlaceholderFrame()) {
|
|
// Also reparent the out-of-flow and all its continuations. We're doing
|
|
// this to match Gecko for now, but it's not clear that this behavior is
|
|
// correct per spec. It's certainly pretty odd for out-of-flows whose
|
|
// containing block is not within the first line.
|
|
//
|
|
// Right now we're somewhat inconsistent in this testcase:
|
|
//
|
|
// <style>
|
|
// div { color: orange; clear: left; }
|
|
// div::first-line { color: blue; }
|
|
// </style>
|
|
// <div>
|
|
// <span style="float: left">What color is this text?</span>
|
|
// </div>
|
|
// <div>
|
|
// <span><span style="float: left">What color is this text?</span></span>
|
|
// </div>
|
|
//
|
|
// We make the first float orange and the second float blue. On the other
|
|
// hand, if the float were within an inline-block that was on the first
|
|
// line, arguably it _should_ inherit from the ::first-line...
|
|
nsIFrame* outOfFlow =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
MOZ_ASSERT(outOfFlow, "no out-of-flow frame");
|
|
for (; outOfFlow; outOfFlow = outOfFlow->GetNextContinuation()) {
|
|
DoReparentComputedStyleForFirstLine(outOfFlow, aStyleSet);
|
|
}
|
|
}
|
|
|
|
// FIXME(emilio): This is the only caller of GetParentComputedStyle, let's try
|
|
// to remove it?
|
|
nsIFrame* providerFrame;
|
|
ComputedStyle* newParentStyle =
|
|
aFrame->GetParentComputedStyle(&providerFrame);
|
|
// If our provider is our child, we want to reparent it first, because we
|
|
// inherit style from it.
|
|
bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
|
|
nsIFrame* providerChild = nullptr;
|
|
if (isChild) {
|
|
DoReparentComputedStyleForFirstLine(providerFrame, aStyleSet);
|
|
// Get the style again after ReparentComputedStyle() which might have
|
|
// changed it.
|
|
newParentStyle = providerFrame->Style();
|
|
providerChild = providerFrame;
|
|
MOZ_ASSERT(!providerFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW),
|
|
"Out of flow provider?");
|
|
}
|
|
|
|
if (!newParentStyle) {
|
|
// No need to do anything here for this frame, but we should still reparent
|
|
// its descendants, because those may have styles that inherit from the
|
|
// parent of this frame (e.g. non-anonymous columns in an anonymous
|
|
// colgroup).
|
|
MOZ_ASSERT(aFrame->Style()->IsNonInheritingAnonBox(),
|
|
"Why did this frame not end up with a parent context?");
|
|
ReparentFrameDescendants(aFrame, providerChild, aStyleSet);
|
|
return;
|
|
}
|
|
|
|
bool isElement = aFrame->GetContent()->IsElement();
|
|
|
|
// We probably don't want to initiate transitions from ReparentComputedStyle,
|
|
// since we call it during frame construction rather than in response to
|
|
// dynamic changes.
|
|
// Also see the comment at the start of
|
|
// nsTransitionManager::ConsiderInitiatingTransition.
|
|
//
|
|
// We don't try to do the fancy copying from previous continuations that
|
|
// GeckoRestyleManager does here, because that relies on knowing the parents
|
|
// of ComputedStyles, and we don't know those.
|
|
ComputedStyle* oldStyle = aFrame->Style();
|
|
Element* ourElement =
|
|
oldStyle->GetPseudoType() == CSSPseudoElementType::NotPseudo &&
|
|
isElement ?
|
|
aFrame->GetContent()->AsElement() :
|
|
nullptr;
|
|
ComputedStyle* newParent = newParentStyle;
|
|
|
|
ComputedStyle* newParentIgnoringFirstLine;
|
|
if (newParent->GetPseudoType() == CSSPseudoElementType::firstLine) {
|
|
MOZ_ASSERT(providerFrame && providerFrame->GetParent()->
|
|
IsFrameOfType(nsIFrame::eBlockFrame),
|
|
"How could we get a ::first-line parent style without having "
|
|
"a ::first-line provider frame?");
|
|
// If newParent is a ::first-line style, get the parent blockframe, and then
|
|
// correct it for our pseudo as needed (e.g. stepping out of anon boxes).
|
|
// Use the resulting style for the "parent style ignoring ::first-line".
|
|
nsIFrame* blockFrame = providerFrame->GetParent();
|
|
nsIFrame* correctedFrame =
|
|
nsFrame::CorrectStyleParentFrame(blockFrame, oldStyle->GetPseudo());
|
|
newParentIgnoringFirstLine = correctedFrame->Style();
|
|
} else {
|
|
newParentIgnoringFirstLine = newParent;
|
|
}
|
|
|
|
if (!providerFrame) {
|
|
// No providerFrame means we inherited from a display:contents thing. Our
|
|
// layout parent style is the style of our nearest ancestor frame. But we have
|
|
// to be careful to do that with our placeholder, not with us, if we're out of
|
|
// flow.
|
|
if (aFrame->HasAnyStateBits(NS_FRAME_OUT_OF_FLOW)) {
|
|
aFrame->GetPlaceholderFrame()->GetLayoutParentStyleForOutOfFlow(&providerFrame);
|
|
} else {
|
|
providerFrame = nsFrame::CorrectStyleParentFrame(aFrame->GetParent(),
|
|
oldStyle->GetPseudo());
|
|
}
|
|
}
|
|
ComputedStyle* layoutParent = providerFrame->Style();
|
|
|
|
RefPtr<ComputedStyle> newStyle =
|
|
aStyleSet.ReparentComputedStyle(oldStyle,
|
|
newParent,
|
|
newParentIgnoringFirstLine,
|
|
layoutParent,
|
|
ourElement);
|
|
aFrame->SetComputedStyle(newStyle);
|
|
|
|
// This logic somewhat mirrors the logic in
|
|
// RestyleManager::ProcessPostTraversal.
|
|
if (isElement) {
|
|
// We can't use UpdateAdditionalComputedStyles as-is because it needs a
|
|
// ServoRestyleState and maintaining one of those during a _frametree_
|
|
// traversal is basically impossible.
|
|
uint32_t index = 0;
|
|
while (auto* oldAdditionalStyle = aFrame->GetAdditionalComputedStyle(index)) {
|
|
RefPtr<ComputedStyle> newAdditionalContext =
|
|
aStyleSet.ReparentComputedStyle(oldAdditionalStyle,
|
|
newStyle,
|
|
newStyle,
|
|
newStyle,
|
|
nullptr);
|
|
aFrame->SetAdditionalComputedStyle(index, newAdditionalContext);
|
|
++index;
|
|
}
|
|
}
|
|
|
|
// Generally, owned anon boxes are our descendants. The only exceptions are
|
|
// tables (for the table wrapper) and inline frames (for the block part of the
|
|
// block-in-inline split). We're going to update our descendants when looping
|
|
// over kids, and we don't want to update the block part of a block-in-inline
|
|
// split if the inline is on the first line but the block is not (and if the
|
|
// block is, it's the child of something else on the first line and will get
|
|
// updated as a child). And given how this method ends up getting called, if
|
|
// we reach here for a table frame, we are already in the middle of
|
|
// reparenting the table wrapper frame. So no need to
|
|
// UpdateStyleOfOwnedAnonBoxes() here.
|
|
|
|
ReparentFrameDescendants(aFrame, providerChild, aStyleSet);
|
|
|
|
// We do not need to do the equivalent of UpdateFramePseudoElementStyles,
|
|
// because those are handled by our descendant walk.
|
|
}
|
|
|
|
void
|
|
RestyleManager::ReparentFrameDescendants(nsIFrame* aFrame,
|
|
nsIFrame* aProviderChild,
|
|
ServoStyleSet& aStyleSet)
|
|
{
|
|
if (aFrame->GetContent()->IsElement() &&
|
|
!aFrame->GetContent()->AsElement()->HasServoData()) {
|
|
// We're getting into a display: none subtree, avoid reparenting into stuff
|
|
// that is going to go away anyway in seconds.
|
|
return;
|
|
}
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
for (nsIFrame* child : lists.CurrentList()) {
|
|
// only do frames that are in flow
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
|
|
child != aProviderChild) {
|
|
DoReparentComputedStyleForFirstLine(child, aStyleSet);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|