| /* |
| * Copyright (C) 2016-2017 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "RenderTreeUpdater.h" |
| |
| #include "AXObjectCache.h" |
| #include "CSSAnimationController.h" |
| #include "ComposedTreeAncestorIterator.h" |
| #include "ComposedTreeIterator.h" |
| #include "Document.h" |
| #include "DocumentTimeline.h" |
| #include "Element.h" |
| #include "FullscreenManager.h" |
| #include "HTMLParserIdioms.h" |
| #include "HTMLSlotElement.h" |
| #include "InspectorInstrumentation.h" |
| #include "NodeRenderStyle.h" |
| #include "PseudoElement.h" |
| #include "RenderDescendantIterator.h" |
| #include "RenderFullScreen.h" |
| #include "RenderInline.h" |
| #include "RenderMultiColumnFlow.h" |
| #include "RenderMultiColumnSet.h" |
| #include "RenderTreeUpdaterGeneratedContent.h" |
| #include "RenderView.h" |
| #include "RuntimeEnabledFeatures.h" |
| #include "StyleResolver.h" |
| #include "StyleTreeResolver.h" |
| #include "TextManipulationController.h" |
| #include <wtf/SystemTracing.h> |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| #include "FrameView.h" |
| #include "FrameViewLayoutContext.h" |
| #include "LayoutState.h" |
| #include "LayoutTreeBuilder.h" |
| #endif |
| |
| #if PLATFORM(IOS_FAMILY) |
| #include "ContentChangeObserver.h" |
| #endif |
| |
| namespace WebCore { |
| |
| RenderTreeUpdater::Parent::Parent(ContainerNode& root) |
| : element(is<Document>(root) ? nullptr : downcast<Element>(&root)) |
| , renderTreePosition(RenderTreePosition(*root.renderer())) |
| { |
| } |
| |
| RenderTreeUpdater::Parent::Parent(Element& element, const Style::ElementUpdates* updates) |
| : element(&element) |
| , updates(updates) |
| , renderTreePosition(element.renderer() ? makeOptional(RenderTreePosition(*element.renderer())) : WTF::nullopt) |
| { |
| } |
| |
| RenderTreeUpdater::RenderTreeUpdater(Document& document) |
| : m_document(document) |
| , m_generatedContent(makeUnique<GeneratedContent>(*this)) |
| , m_builder(renderView()) |
| { |
| } |
| |
| RenderTreeUpdater::~RenderTreeUpdater() = default; |
| |
| static ContainerNode* findRenderingRoot(ContainerNode& node) |
| { |
| if (node.renderer()) |
| return &node; |
| for (auto& ancestor : composedTreeAncestors(node)) { |
| if (ancestor.renderer()) |
| return &ancestor; |
| if (!ancestor.hasDisplayContents()) |
| return nullptr; |
| } |
| return &node.document(); |
| } |
| |
| static ListHashSet<ContainerNode*> findRenderingRoots(const Style::Update& update) |
| { |
| ListHashSet<ContainerNode*> renderingRoots; |
| for (auto* root : update.roots()) { |
| auto* renderingRoot = findRenderingRoot(*root); |
| if (!renderingRoot) |
| continue; |
| renderingRoots.add(renderingRoot); |
| } |
| return renderingRoots; |
| } |
| |
| void RenderTreeUpdater::commit(std::unique_ptr<const Style::Update> styleUpdate) |
| { |
| ASSERT(&m_document == &styleUpdate->document()); |
| |
| if (!m_document.shouldCreateRenderers() || !m_document.renderView()) |
| return; |
| |
| TraceScope scope(RenderTreeBuildStart, RenderTreeBuildEnd); |
| |
| Style::PostResolutionCallbackDisabler callbackDisabler(m_document); |
| |
| m_styleUpdate = WTFMove(styleUpdate); |
| |
| for (auto* root : findRenderingRoots(*m_styleUpdate)) |
| updateRenderTree(*root); |
| |
| generatedContent().updateRemainingQuotes(); |
| |
| m_builder.updateAfterDescendants(renderView()); |
| |
| m_styleUpdate = nullptr; |
| } |
| |
| static bool shouldCreateRenderer(const Element& element, const RenderElement& parentRenderer) |
| { |
| if (!parentRenderer.canHaveChildren() && !(element.isPseudoElement() && parentRenderer.canHaveGeneratedChildren())) |
| return false; |
| if (parentRenderer.element() && !parentRenderer.element()->childShouldCreateRenderer(element)) |
| return false; |
| return true; |
| } |
| |
| void RenderTreeUpdater::updateRenderTree(ContainerNode& root) |
| { |
| ASSERT(root.renderer()); |
| ASSERT(m_parentStack.isEmpty()); |
| |
| m_parentStack.append(Parent(root)); |
| |
| auto descendants = composedTreeDescendants(root); |
| auto it = descendants.begin(); |
| auto end = descendants.end(); |
| |
| // FIXME: https://bugs.webkit.org/show_bug.cgi?id=156172 |
| it.dropAssertions(); |
| |
| while (it != end) { |
| popParentsToDepth(it.depth()); |
| |
| auto& node = *it; |
| |
| if (auto* renderer = node.renderer()) |
| renderTreePosition().invalidateNextSibling(*renderer); |
| else if (is<Element>(node) && downcast<Element>(node).hasDisplayContents()) |
| renderTreePosition().invalidateNextSibling(); |
| |
| if (is<Text>(node)) { |
| auto& text = downcast<Text>(node); |
| auto* textUpdate = m_styleUpdate->textUpdate(text); |
| bool didCreateParent = parent().updates && parent().updates->update.change == Style::Detach; |
| bool mayNeedUpdateWhitespaceOnlyRenderer = renderingParent().didCreateOrDestroyChildRenderer && text.data().isAllSpecialCharacters<isHTMLSpace>(); |
| if (didCreateParent || textUpdate || mayNeedUpdateWhitespaceOnlyRenderer) |
| updateTextRenderer(text, textUpdate); |
| |
| storePreviousRenderer(text); |
| it.traverseNextSkippingChildren(); |
| continue; |
| } |
| |
| auto& element = downcast<Element>(node); |
| |
| auto* elementUpdates = m_styleUpdate->elementUpdates(element); |
| |
| // We hop through display: contents elements in findRenderingRoot, so |
| // there may be other updates down the tree. |
| if (!elementUpdates && !element.hasDisplayContents()) { |
| storePreviousRenderer(element); |
| it.traverseNextSkippingChildren(); |
| continue; |
| } |
| |
| if (elementUpdates) |
| updateElementRenderer(element, elementUpdates->update); |
| |
| storePreviousRenderer(element); |
| |
| bool mayHaveRenderedDescendants = element.renderer() || (element.hasDisplayContents() && shouldCreateRenderer(element, renderTreePosition().parent())); |
| if (!mayHaveRenderedDescendants) { |
| it.traverseNextSkippingChildren(); |
| continue; |
| } |
| |
| pushParent(element, elementUpdates); |
| |
| it.traverseNext(); |
| } |
| |
| popParentsToDepth(0); |
| } |
| |
| auto RenderTreeUpdater::renderingParent() -> Parent& |
| { |
| for (unsigned i = m_parentStack.size(); i--;) { |
| if (m_parentStack[i].renderTreePosition) |
| return m_parentStack[i]; |
| } |
| ASSERT_NOT_REACHED(); |
| return m_parentStack.last(); |
| } |
| |
| RenderTreePosition& RenderTreeUpdater::renderTreePosition() |
| { |
| return *renderingParent().renderTreePosition; |
| } |
| |
| void RenderTreeUpdater::pushParent(Element& element, const Style::ElementUpdates* updates) |
| { |
| m_parentStack.append(Parent(element, updates)); |
| |
| updateBeforeDescendants(element, updates); |
| } |
| |
| void RenderTreeUpdater::popParent() |
| { |
| auto& parent = m_parentStack.last(); |
| if (parent.element) |
| updateAfterDescendants(*parent.element, parent.updates); |
| |
| m_parentStack.removeLast(); |
| } |
| |
| void RenderTreeUpdater::popParentsToDepth(unsigned depth) |
| { |
| ASSERT(m_parentStack.size() >= depth); |
| |
| while (m_parentStack.size() > depth) |
| popParent(); |
| } |
| |
| void RenderTreeUpdater::updateBeforeDescendants(Element& element, const Style::ElementUpdates* updates) |
| { |
| if (updates) |
| generatedContent().updatePseudoElement(element, updates->beforePseudoElementUpdate, PseudoId::Before); |
| } |
| |
| void RenderTreeUpdater::updateAfterDescendants(Element& element, const Style::ElementUpdates* updates) |
| { |
| if (updates) |
| generatedContent().updatePseudoElement(element, updates->afterPseudoElementUpdate, PseudoId::After); |
| |
| auto* renderer = element.renderer(); |
| if (!renderer) |
| return; |
| |
| m_builder.updateAfterDescendants(*renderer); |
| |
| if (element.hasCustomStyleResolveCallbacks() && updates && updates->update.change == Style::Detach) |
| element.didAttachRenderers(); |
| } |
| |
| static bool pseudoStyleCacheIsInvalid(RenderElement* renderer, RenderStyle* newStyle) |
| { |
| const RenderStyle& currentStyle = renderer->style(); |
| |
| const PseudoStyleCache* pseudoStyleCache = currentStyle.cachedPseudoStyles(); |
| if (!pseudoStyleCache) |
| return false; |
| |
| for (auto& cache : *pseudoStyleCache) { |
| PseudoId pseudoId = cache->styleType(); |
| std::unique_ptr<RenderStyle> newPseudoStyle = renderer->getUncachedPseudoStyle({ pseudoId }, newStyle, newStyle); |
| if (!newPseudoStyle) |
| return true; |
| if (*newPseudoStyle != *cache) { |
| newStyle->addCachedPseudoStyle(WTFMove(newPseudoStyle)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void RenderTreeUpdater::updateRendererStyle(RenderElement& renderer, RenderStyle&& newStyle, StyleDifference minimalStyleDifference) |
| { |
| auto oldStyle = RenderStyle::clone(renderer.style()); |
| renderer.setStyle(WTFMove(newStyle), minimalStyleDifference); |
| m_builder.normalizeTreeAfterStyleChange(renderer, oldStyle); |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| if (RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextEnabled()) { |
| if (!m_document.view() || !m_document.view()->layoutContext().layoutTreeContent()) |
| return; |
| if (auto* layoutBox = m_document.view()->layoutContext().layoutTreeContent()->layoutBoxForRenderer(renderer)) |
| layoutBox->updateStyle(renderer.style()); |
| } |
| #endif |
| } |
| |
| void RenderTreeUpdater::updateElementRenderer(Element& element, const Style::ElementUpdate& update) |
| { |
| #if PLATFORM(IOS_FAMILY) |
| ContentChangeObserver::StyleChangeScope observingScope(m_document, element); |
| #endif |
| |
| bool shouldTearDownRenderers = update.change == Style::Detach && (element.renderer() || element.hasDisplayContents()); |
| if (shouldTearDownRenderers) { |
| if (!element.renderer()) { |
| // We may be tearing down a descendant renderer cached in renderTreePosition. |
| renderTreePosition().invalidateNextSibling(); |
| } |
| |
| // display:none cancels animations. |
| auto teardownType = update.style->display() == DisplayType::None ? TeardownType::RendererUpdateCancelingAnimations : TeardownType::RendererUpdate; |
| tearDownRenderers(element, teardownType, m_builder); |
| |
| renderingParent().didCreateOrDestroyChildRenderer = true; |
| } |
| |
| bool hasDisplayContents = update.style->display() == DisplayType::Contents; |
| if (hasDisplayContents) |
| element.storeDisplayContentsStyle(RenderStyle::clonePtr(*update.style)); |
| else |
| element.resetComputedStyle(); |
| |
| bool shouldCreateNewRenderer = !element.renderer() && !hasDisplayContents; |
| if (shouldCreateNewRenderer) { |
| if (element.hasCustomStyleResolveCallbacks()) |
| element.willAttachRenderers(); |
| createRenderer(element, RenderStyle::clone(*update.style)); |
| |
| renderingParent().didCreateOrDestroyChildRenderer = true; |
| return; |
| } |
| |
| if (!element.renderer()) |
| return; |
| auto& renderer = *element.renderer(); |
| |
| if (update.recompositeLayer) { |
| updateRendererStyle(renderer, RenderStyle::clone(*update.style), StyleDifference::RecompositeLayer); |
| return; |
| } |
| |
| if (update.change == Style::NoChange) { |
| if (pseudoStyleCacheIsInvalid(&renderer, update.style.get())) { |
| updateRendererStyle(renderer, RenderStyle::clone(*update.style), StyleDifference::Equal); |
| return; |
| } |
| return; |
| } |
| |
| updateRendererStyle(renderer, RenderStyle::clone(*update.style), StyleDifference::Equal); |
| } |
| |
| void RenderTreeUpdater::createRenderer(Element& element, RenderStyle&& style) |
| { |
| auto computeInsertionPosition = [this, &element] () { |
| renderTreePosition().computeNextSibling(element); |
| return renderTreePosition(); |
| }; |
| |
| if (!shouldCreateRenderer(element, renderTreePosition().parent())) |
| return; |
| |
| if (!element.rendererIsNeeded(style)) |
| return; |
| |
| RenderTreePosition insertionPosition = computeInsertionPosition(); |
| auto newRenderer = element.createElementRenderer(WTFMove(style), insertionPosition); |
| if (!newRenderer) |
| return; |
| |
| if (!insertionPosition.parent().isChildAllowed(*newRenderer, newRenderer->style())) |
| return; |
| |
| element.setRenderer(newRenderer.get()); |
| |
| newRenderer->initializeStyle(); |
| |
| #if ENABLE(FULLSCREEN_API) |
| if (m_document.fullscreenManager().isFullscreen() && m_document.fullscreenManager().currentFullscreenElement() == &element) { |
| newRenderer = RenderFullScreen::wrapNewRenderer(m_builder, WTFMove(newRenderer), insertionPosition.parent(), m_document); |
| if (!newRenderer) |
| return; |
| } |
| #endif |
| |
| m_builder.attach(insertionPosition, WTFMove(newRenderer)); |
| |
| auto* textManipulationController = m_document.textManipulationControllerIfExists(); |
| if (UNLIKELY(textManipulationController)) |
| textManipulationController->didCreateRendererForElement(element); |
| |
| if (AXObjectCache* cache = m_document.axObjectCache()) |
| cache->updateCacheAfterNodeIsAttached(&element); |
| } |
| |
| bool RenderTreeUpdater::textRendererIsNeeded(const Text& textNode) |
| { |
| auto& renderingParent = this->renderingParent(); |
| auto& parentRenderer = renderingParent.renderTreePosition->parent(); |
| if (!parentRenderer.canHaveChildren()) |
| return false; |
| if (parentRenderer.element() && !parentRenderer.element()->childShouldCreateRenderer(textNode)) |
| return false; |
| if (textNode.isEditingText()) |
| return true; |
| if (!textNode.length()) |
| return false; |
| if (!textNode.data().isAllSpecialCharacters<isHTMLSpace>()) |
| return true; |
| if (is<RenderText>(renderingParent.previousChildRenderer)) |
| return true; |
| // This text node has nothing but white space. We may still need a renderer in some cases. |
| if (parentRenderer.isTable() || parentRenderer.isTableRow() || parentRenderer.isTableSection() || parentRenderer.isRenderTableCol() || parentRenderer.isFrameSet()) |
| return false; |
| if (parentRenderer.isFlexibleBox() && !parentRenderer.isRenderButton()) |
| return false; |
| if (parentRenderer.style().preserveNewline()) // pre/pre-wrap/pre-line always make renderers. |
| return true; |
| |
| auto* previousRenderer = renderingParent.previousChildRenderer; |
| if (previousRenderer && previousRenderer->isBR()) // <span><br/> <br/></span> |
| return false; |
| |
| if (parentRenderer.isRenderInline()) { |
| // <span><div/> <div/></span> |
| if (previousRenderer && !previousRenderer->isInline()) |
| return false; |
| } else { |
| if (parentRenderer.isRenderBlock() && !parentRenderer.childrenInline() && (!previousRenderer || !previousRenderer->isInline())) |
| return false; |
| |
| RenderObject* first = parentRenderer.firstChild(); |
| while (first && first->isFloatingOrOutOfFlowPositioned()) |
| first = first->nextSibling(); |
| RenderObject* nextRenderer = textNode.renderer() ? textNode.renderer() : renderTreePosition().nextSiblingRenderer(textNode); |
| if (!first || nextRenderer == first) { |
| // Whitespace at the start of a block just goes away. Don't even make a render object for this text. |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void RenderTreeUpdater::createTextRenderer(Text& textNode, const Style::TextUpdate* textUpdate) |
| { |
| ASSERT(!textNode.renderer()); |
| |
| auto& renderTreePosition = this->renderTreePosition(); |
| auto textRenderer = textNode.createTextRenderer(renderTreePosition.parent().style()); |
| |
| renderTreePosition.computeNextSibling(textNode); |
| |
| if (!renderTreePosition.parent().isChildAllowed(*textRenderer, renderTreePosition.parent().style())) |
| return; |
| |
| textNode.setRenderer(textRenderer.get()); |
| |
| if (textUpdate && textUpdate->inheritedDisplayContentsStyle && *textUpdate->inheritedDisplayContentsStyle) { |
| // Wrap text renderer into anonymous inline so we can give it a style. |
| // This is to support "<div style='display:contents;color:green'>text</div>" type cases |
| auto newDisplayContentsAnonymousWrapper = WebCore::createRenderer<RenderInline>(textNode.document(), RenderStyle::clone(**textUpdate->inheritedDisplayContentsStyle)); |
| newDisplayContentsAnonymousWrapper->initializeStyle(); |
| auto& displayContentsAnonymousWrapper = *newDisplayContentsAnonymousWrapper; |
| m_builder.attach(renderTreePosition, WTFMove(newDisplayContentsAnonymousWrapper)); |
| |
| textRenderer->setInlineWrapperForDisplayContents(&displayContentsAnonymousWrapper); |
| m_builder.attach(displayContentsAnonymousWrapper, WTFMove(textRenderer)); |
| return; |
| } |
| |
| m_builder.attach(renderTreePosition, WTFMove(textRenderer)); |
| } |
| |
| void RenderTreeUpdater::updateTextRenderer(Text& text, const Style::TextUpdate* textUpdate) |
| { |
| auto* existingRenderer = text.renderer(); |
| bool needsRenderer = textRendererIsNeeded(text); |
| |
| if (existingRenderer && textUpdate && textUpdate->inheritedDisplayContentsStyle) { |
| if (existingRenderer->inlineWrapperForDisplayContents() || *textUpdate->inheritedDisplayContentsStyle) { |
| // FIXME: We could update without teardown. |
| tearDownTextRenderer(text, m_builder); |
| existingRenderer = nullptr; |
| } |
| } |
| |
| if (existingRenderer) { |
| if (needsRenderer) { |
| if (textUpdate) |
| existingRenderer->setTextWithOffset(text.data(), textUpdate->offset, textUpdate->length); |
| return; |
| } |
| tearDownTextRenderer(text, m_builder); |
| renderingParent().didCreateOrDestroyChildRenderer = true; |
| return; |
| } |
| if (!needsRenderer) |
| return; |
| createTextRenderer(text, textUpdate); |
| renderingParent().didCreateOrDestroyChildRenderer = true; |
| } |
| |
| void RenderTreeUpdater::storePreviousRenderer(Node& node) |
| { |
| auto* renderer = node.renderer(); |
| if (!renderer) |
| return; |
| ASSERT(renderingParent().previousChildRenderer != renderer); |
| renderingParent().previousChildRenderer = renderer; |
| } |
| |
| void RenderTreeUpdater::tearDownRenderers(Element& root) |
| { |
| auto* view = root.document().renderView(); |
| if (!view) |
| return; |
| RenderTreeBuilder builder(*view); |
| tearDownRenderers(root, TeardownType::Full, builder); |
| } |
| |
| void RenderTreeUpdater::tearDownRenderer(Text& text) |
| { |
| auto* view = text.document().renderView(); |
| if (!view) |
| return; |
| RenderTreeBuilder builder(*view); |
| tearDownTextRenderer(text, builder); |
| } |
| |
| void RenderTreeUpdater::tearDownRenderers(Element& root, TeardownType teardownType, RenderTreeBuilder& builder) |
| { |
| WidgetHierarchyUpdatesSuspensionScope suspendWidgetHierarchyUpdates; |
| |
| Vector<Element*, 30> teardownStack; |
| |
| auto push = [&] (Element& element) { |
| if (element.hasCustomStyleResolveCallbacks()) |
| element.willDetachRenderers(); |
| teardownStack.append(&element); |
| }; |
| |
| auto& document = root.document(); |
| auto* timeline = document.existingTimeline(); |
| auto& animationController = document.frame()->animation(); |
| |
| auto pop = [&] (unsigned depth) { |
| while (teardownStack.size() > depth) { |
| auto& element = *teardownStack.takeLast(); |
| |
| if (teardownType == TeardownType::Full || teardownType == TeardownType::RendererUpdateCancelingAnimations) { |
| if (timeline) { |
| if (document.renderTreeBeingDestroyed()) |
| timeline->elementWasRemoved(element); |
| else if (teardownType == TeardownType::RendererUpdateCancelingAnimations) |
| timeline->cancelDeclarativeAnimationsForElement(element); |
| } |
| animationController.cancelAnimations(element); |
| } |
| |
| if (teardownType == TeardownType::Full) |
| element.clearHoverAndActiveStatusBeforeDetachingRenderer(); |
| |
| GeneratedContent::removeBeforePseudoElement(element, builder); |
| GeneratedContent::removeAfterPseudoElement(element, builder); |
| |
| if (auto* renderer = element.renderer()) { |
| builder.destroyAndCleanUpAnonymousWrappers(*renderer); |
| element.setRenderer(nullptr); |
| } |
| |
| // Make sure we don't leave any renderers behind in nodes outside the composed tree. |
| if (element.shadowRoot()) |
| tearDownLeftoverShadowHostChildren(element, builder); |
| |
| if (element.hasCustomStyleResolveCallbacks()) |
| element.didDetachRenderers(); |
| } |
| }; |
| |
| push(root); |
| |
| auto descendants = composedTreeDescendants(root); |
| for (auto it = descendants.begin(), end = descendants.end(); it != end; ++it) { |
| pop(it.depth()); |
| |
| if (is<Text>(*it)) { |
| tearDownTextRenderer(downcast<Text>(*it), builder); |
| continue; |
| } |
| |
| push(downcast<Element>(*it)); |
| } |
| |
| pop(0); |
| |
| tearDownLeftoverPaginationRenderersIfNeeded(root, builder); |
| } |
| |
| void RenderTreeUpdater::tearDownTextRenderer(Text& text, RenderTreeBuilder& builder) |
| { |
| auto* renderer = text.renderer(); |
| if (!renderer) |
| return; |
| builder.destroyAndCleanUpAnonymousWrappers(*renderer); |
| text.setRenderer(nullptr); |
| } |
| |
| void RenderTreeUpdater::tearDownLeftoverPaginationRenderersIfNeeded(Element& root, RenderTreeBuilder& builder) |
| { |
| if (&root != root.document().documentElement()) |
| return; |
| for (auto* child = root.document().renderView()->firstChild(); child;) { |
| auto* nextSibling = child->nextSibling(); |
| if (is<RenderMultiColumnFlow>(*child) || is<RenderMultiColumnSet>(*child)) |
| builder.destroyAndCleanUpAnonymousWrappers(*child); |
| child = nextSibling; |
| } |
| } |
| |
| void RenderTreeUpdater::tearDownLeftoverShadowHostChildren(Element& host, RenderTreeBuilder& builder) |
| { |
| for (auto* hostChild = host.firstChild(); hostChild; hostChild = hostChild->nextSibling()) { |
| if (!hostChild->renderer()) |
| continue; |
| if (is<Text>(*hostChild)) { |
| tearDownTextRenderer(downcast<Text>(*hostChild), builder); |
| continue; |
| } |
| if (is<Element>(*hostChild)) |
| tearDownRenderers(downcast<Element>(*hostChild), TeardownType::Full, builder); |
| } |
| } |
| |
| RenderView& RenderTreeUpdater::renderView() |
| { |
| return *m_document.renderView(); |
| } |
| |
| } |
