1524 lines
64 KiB
C++
1524 lines
64 KiB
C++
/*
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* Copyright (C) 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ApplyStyleCommand.h"
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#include "CSSComputedStyleDeclaration.h"
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#include "CSSParser.h"
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#include "CSSValuePool.h"
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#include "Document.h"
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#include "Editing.h"
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#include "Editor.h"
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#include "ElementIterator.h"
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#include "Frame.h"
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#include "HTMLFontElement.h"
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#include "HTMLIFrameElement.h"
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#include "HTMLInterchange.h"
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#include "HTMLNames.h"
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#include "HTMLSpanElement.h"
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#include "NodeList.h"
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#include "NodeTraversal.h"
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#include "RenderObject.h"
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#include "RenderText.h"
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#include "ScriptDisallowedScope.h"
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#include "StyleProperties.h"
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#include "StyleResolver.h"
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#include "Text.h"
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#include "TextIterator.h"
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#include "TextNodeTraversal.h"
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#include "VisibleUnits.h"
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#include <wtf/NeverDestroyed.h>
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#include <wtf/StdLibExtras.h>
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#include <wtf/text/StringBuilder.h>
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namespace WebCore {
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using namespace HTMLNames;
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static int toIdentifier(RefPtr<CSSValue>&& value)
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{
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return is<CSSPrimitiveValue>(value) ? downcast<CSSPrimitiveValue>(*value).valueID() : 0;
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}
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static String& styleSpanClassString()
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{
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static NeverDestroyed<String> styleSpanClassString(AppleStyleSpanClass);
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return styleSpanClassString;
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}
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bool isLegacyAppleStyleSpan(const Node* node)
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{
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if (!is<HTMLSpanElement>(node))
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return false;
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return downcast<HTMLSpanElement>(*node).attributeWithoutSynchronization(classAttr) == styleSpanClassString();
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}
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static bool hasNoAttributeOrOnlyStyleAttribute(const StyledElement& element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)
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{
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if (!element.hasAttributes())
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return true;
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unsigned matchedAttributes = 0;
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if (element.attributeWithoutSynchronization(classAttr) == styleSpanClassString())
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matchedAttributes++;
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if (element.hasAttribute(styleAttr) && (shouldStyleAttributeBeEmpty == AllowNonEmptyStyleAttribute
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|| !element.inlineStyle() || element.inlineStyle()->isEmpty()))
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matchedAttributes++;
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ASSERT(matchedAttributes <= element.attributeCount());
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return matchedAttributes == element.attributeCount();
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}
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bool isStyleSpanOrSpanWithOnlyStyleAttribute(const Element& element)
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{
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if (!is<HTMLSpanElement>(element))
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return false;
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return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLSpanElement>(element), AllowNonEmptyStyleAttribute);
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}
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static inline bool isSpanWithoutAttributesOrUnstyledStyleSpan(const Element& element)
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{
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if (!is<HTMLSpanElement>(element))
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return false;
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return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLSpanElement>(element), StyleAttributeShouldBeEmpty);
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}
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bool isEmptyFontTag(const Element* element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)
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{
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if (!is<HTMLFontElement>(element))
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return false;
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return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLFontElement>(*element), shouldStyleAttributeBeEmpty);
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}
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static Ref<HTMLElement> createFontElement(Document& document)
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{
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return createHTMLElement(document, fontTag);
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}
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Ref<HTMLElement> createStyleSpanElement(Document& document)
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{
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return createHTMLElement(document, spanTag);
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}
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ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, EditAction editingAction, EPropertyLevel propertyLevel)
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: CompositeEditCommand(document, editingAction)
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, m_style(style->copy())
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, m_propertyLevel(propertyLevel)
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, m_start(endingSelection().start().downstream())
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, m_end(endingSelection().end().upstream())
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, m_useEndingSelection(true)
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, m_removeOnly(false)
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{
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}
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ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, const Position& start, const Position& end, EditAction editingAction, EPropertyLevel propertyLevel)
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: CompositeEditCommand(document, editingAction)
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, m_style(style->copy())
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, m_propertyLevel(propertyLevel)
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, m_start(start)
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, m_end(end)
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, m_useEndingSelection(false)
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, m_removeOnly(false)
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{
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}
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ApplyStyleCommand::ApplyStyleCommand(Ref<Element>&& element, bool removeOnly, EditAction editingAction)
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: CompositeEditCommand(element->document(), editingAction)
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, m_style(EditingStyle::create())
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, m_propertyLevel(PropertyDefault)
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, m_start(endingSelection().start().downstream())
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, m_end(endingSelection().end().upstream())
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, m_useEndingSelection(true)
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, m_styledInlineElement(WTFMove(element))
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, m_removeOnly(removeOnly)
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{
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}
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ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, IsInlineElementToRemoveFunction isInlineElementToRemoveFunction, EditAction editingAction)
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: CompositeEditCommand(document, editingAction)
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, m_style(style->copy())
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, m_propertyLevel(PropertyDefault)
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, m_start(endingSelection().start().downstream())
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, m_end(endingSelection().end().upstream())
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, m_useEndingSelection(true)
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, m_removeOnly(true)
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, m_isInlineElementToRemoveFunction(isInlineElementToRemoveFunction)
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{
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}
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void ApplyStyleCommand::updateStartEnd(const Position& newStart, const Position& newEnd)
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{
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ASSERT(!is_gt(treeOrder<ShadowIncludingTree>(newStart, newEnd)));
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if (!m_useEndingSelection && (newStart != m_start || newEnd != m_end))
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m_useEndingSelection = true;
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bool wasBaseFirst = startingSelection().isBaseFirst() || !startingSelection().isDirectional();
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setEndingSelection(VisibleSelection(wasBaseFirst ? newStart : newEnd, wasBaseFirst ? newEnd : newStart, VisiblePosition::defaultAffinity, endingSelection().isDirectional()));
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m_start = newStart;
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m_end = newEnd;
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}
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Position ApplyStyleCommand::startPosition()
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{
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if (m_useEndingSelection)
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return endingSelection().start();
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return m_start;
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}
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Position ApplyStyleCommand::endPosition()
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{
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if (m_useEndingSelection)
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return endingSelection().end();
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return m_end;
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}
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void ApplyStyleCommand::doApply()
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{
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switch (m_propertyLevel) {
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case PropertyDefault: {
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// Apply the block-centric properties of the style.
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auto blockStyle = m_style->extractAndRemoveBlockProperties();
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if (!blockStyle->isEmpty())
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applyBlockStyle(blockStyle);
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// Apply any remaining styles to the inline elements.
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if (!m_style->isEmpty() || m_styledInlineElement || m_isInlineElementToRemoveFunction) {
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applyRelativeFontStyleChange(m_style.get());
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applyInlineStyle(*m_style);
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}
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break;
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}
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case ForceBlockProperties:
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// Force all properties to be applied as block styles.
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applyBlockStyle(*m_style);
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break;
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}
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}
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void ApplyStyleCommand::applyBlockStyle(EditingStyle& style)
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{
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// Update document layout once before removing styles so that we avoid the expense of
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// updating before each and every call to check a computed style.
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document().updateLayoutIgnorePendingStylesheets();
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auto start = startPosition();
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auto end = endPosition();
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if (end < start)
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std::swap(start, end);
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VisiblePosition visibleStart(start);
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VisiblePosition visibleEnd(end);
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if (visibleStart.isNull() || visibleStart.isOrphan() || visibleEnd.isNull() || visibleEnd.isOrphan())
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return;
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// Save and restore the selection endpoints using their indices in the editable root, since
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// addBlockStyleIfNeeded may moveParagraphs, which can remove these endpoints.
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// Calculate start and end indices from the start of the tree that they're in.
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auto scopeRoot = makeRefPtr(highestEditableRoot(visibleStart.deepEquivalent()));
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if (!scopeRoot)
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return;
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auto scope = makeRangeSelectingNodeContents(*scopeRoot);
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auto range = *makeSimpleRange(visibleStart, visibleEnd);
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auto startIndex = characterCount({ scope.start, range.start }, TextIteratorBehavior::EmitsCharactersBetweenAllVisiblePositions);
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auto endIndex = characterCount({ scope.start, range.end }, TextIteratorBehavior::EmitsCharactersBetweenAllVisiblePositions);
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VisiblePosition paragraphStart(startOfParagraph(visibleStart));
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VisiblePosition nextParagraphStart(endOfParagraph(paragraphStart).next());
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if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
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visibleEnd = visibleEnd.previous(CannotCrossEditingBoundary);
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VisiblePosition beyondEnd(endOfParagraph(visibleEnd).next());
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while (paragraphStart.isNotNull() && paragraphStart != beyondEnd) {
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StyleChange styleChange(&style, paragraphStart.deepEquivalent());
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if (styleChange.cssStyle() || m_removeOnly) {
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RefPtr<Node> block = enclosingBlock(paragraphStart.deepEquivalent().deprecatedNode());
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if (!m_removeOnly) {
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RefPtr<Node> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStart.deepEquivalent());
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if (newBlock)
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block = newBlock;
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}
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ASSERT(!block || is<HTMLElement>(*block));
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if (is<HTMLElement>(block)) {
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removeCSSStyle(style, downcast<HTMLElement>(*block));
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if (!m_removeOnly)
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addBlockStyle(styleChange, downcast<HTMLElement>(*block));
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}
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if (nextParagraphStart.isOrphan())
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nextParagraphStart = endOfParagraph(paragraphStart).next();
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}
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paragraphStart = nextParagraphStart;
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nextParagraphStart = endOfParagraph(paragraphStart).next();
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}
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auto startPosition = makeDeprecatedLegacyPosition(resolveCharacterLocation(scope, startIndex, TextIteratorBehavior::EmitsCharactersBetweenAllVisiblePositions));
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auto endPosition = makeDeprecatedLegacyPosition(resolveCharacterLocation(scope, endIndex, TextIteratorBehavior::EmitsCharactersBetweenAllVisiblePositions));
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updateStartEnd(startPosition, endPosition);
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}
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static Ref<MutableStyleProperties> copyStyleOrCreateEmpty(const StyleProperties* style)
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{
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if (!style)
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return MutableStyleProperties::create();
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return style->mutableCopy();
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}
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void ApplyStyleCommand::applyRelativeFontStyleChange(EditingStyle* style)
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{
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static const float MinimumFontSize = 0.1f;
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if (!style || !style->hasFontSizeDelta())
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return;
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auto start = startPosition();
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auto end = endPosition();
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if (end < start)
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std::swap(start, end);
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// Join up any adjacent text nodes.
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if (is<Text>(start.deprecatedNode())) {
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joinChildTextNodes(start.deprecatedNode()->parentNode(), start, end);
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start = startPosition();
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end = endPosition();
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}
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if (start.isNull() || end.isNull())
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return;
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if (is<Text>(*end.deprecatedNode()) && start.deprecatedNode()->parentNode() != end.deprecatedNode()->parentNode()) {
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joinChildTextNodes(end.deprecatedNode()->parentNode(), start, end);
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start = startPosition();
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end = endPosition();
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}
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if (start.isNull() || end.isNull())
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return;
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// Split the start text nodes if needed to apply style.
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if (isValidCaretPositionInTextNode(start)) {
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splitTextAtStart(start, end);
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start = startPosition();
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end = endPosition();
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}
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if (start.isNull() || end.isNull())
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return;
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if (isValidCaretPositionInTextNode(end)) {
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splitTextAtEnd(start, end);
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start = startPosition();
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end = endPosition();
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}
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if (start.isNull() || end.isNull())
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return;
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// Calculate loop end point.
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// If the end node is before the start node (can only happen if the end node is
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// an ancestor of the start node), we gather nodes up to the next sibling of the end node
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RefPtr<Node> beyondEnd;
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ASSERT(start.deprecatedNode());
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ASSERT(end.deprecatedNode());
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if (end.deprecatedNode()->contains(*start.deprecatedNode()))
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beyondEnd = NodeTraversal::nextSkippingChildren(*end.deprecatedNode());
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else
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beyondEnd = NodeTraversal::next(*end.deprecatedNode());
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start = start.upstream(); // Move upstream to ensure we do not add redundant spans.
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auto startNode = makeRefPtr(start.deprecatedNode());
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// Make sure we're not already at the end or the next NodeTraversal::next() will traverse past it.
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if (startNode == beyondEnd)
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return;
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if (is<Text>(*startNode) && start.deprecatedEditingOffset() >= caretMaxOffset(*startNode)) {
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// Move out of text node if range does not include its characters.
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startNode = NodeTraversal::next(*startNode);
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if (!startNode)
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return;
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}
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// Store away font size before making any changes to the document.
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// This ensures that changes to one node won't effect another.
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HashMap<Ref<Node>, float> startingFontSizes;
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for (auto node = startNode; node != beyondEnd; node = NodeTraversal::next(*node)) {
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ASSERT(node);
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startingFontSizes.set(*node, computedFontSize(node.get()));
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}
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// These spans were added by us. If empty after font size changes, they can be removed.
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Vector<Ref<HTMLElement>> unstyledSpans;
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RefPtr<Node> lastStyledNode;
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bool reachedEnd = false;
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for (auto node = startNode; node != beyondEnd && !reachedEnd; node = NodeTraversal::next(*node)) {
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ASSERT(node);
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RefPtr<HTMLElement> element;
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if (is<HTMLElement>(*node)) {
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// Only work on fully selected nodes.
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if (!nodeFullySelected(downcast<HTMLElement>(*node), start, end))
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continue;
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element = &downcast<HTMLElement>(*node);
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} else if (is<Text>(*node) && node->renderer() && node->parentNode() != lastStyledNode) {
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// Last styled node was not parent node of this text node, but we wish to style this
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// text node. To make this possible, add a style span to surround this text node.
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auto span = createStyleSpanElement(document());
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if (!surroundNodeRangeWithElement(*node, *node, span))
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continue;
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reachedEnd = node->isDescendantOf(beyondEnd.get());
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element = WTFMove(span);
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} else {
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// Only handle HTML elements and text nodes.
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continue;
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}
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lastStyledNode = node;
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RefPtr<MutableStyleProperties> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());
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float currentFontSize = computedFontSize(node.get());
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float desiredFontSize = std::max(MinimumFontSize, startingFontSizes.get(node.get()) + style->fontSizeDelta());
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RefPtr<CSSValue> value = inlineStyle->getPropertyCSSValue(CSSPropertyFontSize);
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if (value) {
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element->removeInlineStyleProperty(CSSPropertyFontSize);
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currentFontSize = computedFontSize(node.get());
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}
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if (currentFontSize != desiredFontSize) {
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inlineStyle->setProperty(CSSPropertyFontSize, CSSValuePool::singleton().createValue(desiredFontSize, CSSUnitType::CSS_PX), false);
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setNodeAttribute(*element, styleAttr, inlineStyle->asText());
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}
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if (inlineStyle->isEmpty()) {
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removeNodeAttribute(*element, styleAttr);
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if (isSpanWithoutAttributesOrUnstyledStyleSpan(*element))
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unstyledSpans.append(element.releaseNonNull());
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}
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}
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for (auto& unstyledSpan : unstyledSpans)
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removeNodePreservingChildren(unstyledSpan);
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}
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static ContainerNode* dummySpanAncestorForNode(Node* node)
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{
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RefPtr<Node> currentNode = node;
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while (currentNode && (!is<Element>(*currentNode) || !isStyleSpanOrSpanWithOnlyStyleAttribute(downcast<Element>(*currentNode))))
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currentNode = currentNode->parentNode();
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return currentNode ? currentNode->parentNode() : nullptr;
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}
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void ApplyStyleCommand::cleanupUnstyledAppleStyleSpans(ContainerNode* dummySpanAncestor)
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{
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if (!dummySpanAncestor)
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return;
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// Dummy spans are created when text node is split, so that style information
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// can be propagated, which can result in more splitting. If a dummy span gets
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// cloned/split, the new node is always a sibling of it. Therefore, we scan
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// all the children of the dummy's parent
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Vector<Ref<Element>> toRemove;
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for (auto& child : childrenOfType<Element>(*dummySpanAncestor)) {
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if (isSpanWithoutAttributesOrUnstyledStyleSpan(child))
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toRemove.append(child);
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}
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for (auto& element : toRemove)
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removeNodePreservingChildren(element.get());
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}
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RefPtr<HTMLElement> ApplyStyleCommand::splitAncestorsWithUnicodeBidi(Node* node, bool before, WritingDirection allowedDirection)
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{
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// We are allowed to leave the highest ancestor with unicode-bidi unsplit if it is unicode-bidi: embed and direction: allowedDirection.
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// In that case, we return the unsplit ancestor. Otherwise, we return 0.
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auto block = makeRefPtr(enclosingBlock(node));
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if (!block || block == node)
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return nullptr;
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RefPtr<Node> highestAncestorWithUnicodeBidi;
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RefPtr<Node> nextHighestAncestorWithUnicodeBidi;
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int highestAncestorUnicodeBidi = 0;
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for (auto ancestor = makeRefPtr(node->parentNode()); ancestor != block; ancestor = ancestor->parentNode()) {
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int unicodeBidi = toIdentifier(ComputedStyleExtractor(ancestor.get()).propertyValue(CSSPropertyUnicodeBidi));
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if (unicodeBidi && unicodeBidi != CSSValueNormal) {
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highestAncestorUnicodeBidi = unicodeBidi;
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nextHighestAncestorWithUnicodeBidi = highestAncestorWithUnicodeBidi;
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highestAncestorWithUnicodeBidi = ancestor;
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}
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}
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if (!highestAncestorWithUnicodeBidi)
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return nullptr;
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RefPtr<HTMLElement> unsplitAncestor;
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if (allowedDirection != WritingDirection::Natural && highestAncestorUnicodeBidi != CSSValueBidiOverride && is<HTMLElement>(*highestAncestorWithUnicodeBidi)) {
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auto highestAncestorDirection = EditingStyle::create(highestAncestorWithUnicodeBidi.get(), EditingStyle::AllProperties)->textDirection();
|
|
if (highestAncestorDirection && *highestAncestorDirection == allowedDirection) {
|
|
if (!nextHighestAncestorWithUnicodeBidi)
|
|
return static_pointer_cast<HTMLElement>(WTFMove(highestAncestorWithUnicodeBidi));
|
|
|
|
unsplitAncestor = static_pointer_cast<HTMLElement>(highestAncestorWithUnicodeBidi);
|
|
highestAncestorWithUnicodeBidi = nextHighestAncestorWithUnicodeBidi;
|
|
}
|
|
}
|
|
|
|
// Split every ancestor through highest ancestor with embedding.
|
|
RefPtr<Node> currentNode = node;
|
|
while (currentNode) {
|
|
RefPtr<Element> parent = downcast<Element>(currentNode->parentNode());
|
|
if (before ? currentNode->previousSibling() : currentNode->nextSibling())
|
|
splitElement(*parent, before ? *currentNode : *currentNode->nextSibling());
|
|
if (parent == highestAncestorWithUnicodeBidi)
|
|
break;
|
|
currentNode = parent;
|
|
}
|
|
|
|
return unsplitAncestor;
|
|
}
|
|
|
|
void ApplyStyleCommand::removeEmbeddingUpToEnclosingBlock(Node* node, Node* unsplitAncestor)
|
|
{
|
|
auto block = makeRefPtr(enclosingBlock(node));
|
|
if (!block || block == node)
|
|
return;
|
|
|
|
for (RefPtr<Node> ancestor = node->parentNode(), parent; ancestor != block && ancestor != unsplitAncestor; ancestor = parent) {
|
|
parent = ancestor->parentNode();
|
|
if (!is<StyledElement>(*ancestor))
|
|
continue;
|
|
|
|
StyledElement& element = downcast<StyledElement>(*ancestor);
|
|
int unicodeBidi = toIdentifier(ComputedStyleExtractor(&element).propertyValue(CSSPropertyUnicodeBidi));
|
|
if (!unicodeBidi || unicodeBidi == CSSValueNormal)
|
|
continue;
|
|
|
|
// FIXME: This code should really consider the mapped attribute 'dir', the inline style declaration,
|
|
// and all matching style rules in order to determine how to best set the unicode-bidi property to 'normal'.
|
|
// For now, it assumes that if the 'dir' attribute is present, then removing it will suffice, and
|
|
// otherwise it sets the property in the inline style declaration.
|
|
if (element.hasAttributeWithoutSynchronization(dirAttr)) {
|
|
// FIXME: If this is a BDO element, we should probably just remove it if it has no
|
|
// other attributes, like we (should) do with B and I elements.
|
|
removeNodeAttribute(element, dirAttr);
|
|
} else {
|
|
auto inlineStyle = copyStyleOrCreateEmpty(element.inlineStyle());
|
|
inlineStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueNormal);
|
|
inlineStyle->removeProperty(CSSPropertyDirection);
|
|
setNodeAttribute(element, styleAttr, inlineStyle->asText());
|
|
if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))
|
|
removeNodePreservingChildren(element);
|
|
}
|
|
}
|
|
}
|
|
|
|
static RefPtr<Node> highestEmbeddingAncestor(Node* startNode, Node* enclosingNode)
|
|
{
|
|
for (auto currentNode = makeRefPtr(startNode); currentNode && currentNode != enclosingNode; currentNode = currentNode->parentNode()) {
|
|
if (currentNode->isHTMLElement() && toIdentifier(ComputedStyleExtractor(currentNode.get()).propertyValue(CSSPropertyUnicodeBidi)) == CSSValueEmbed)
|
|
return currentNode;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void ApplyStyleCommand::applyInlineStyle(EditingStyle& style)
|
|
{
|
|
RefPtr<ContainerNode> startDummySpanAncestor;
|
|
RefPtr<ContainerNode> endDummySpanAncestor;
|
|
|
|
// update document layout once before removing styles
|
|
// so that we avoid the expense of updating before each and every call
|
|
// to check a computed style
|
|
document().updateLayoutIgnorePendingStylesheets();
|
|
|
|
// adjust to the positions we want to use for applying style
|
|
auto start = startPosition();
|
|
auto end = endPosition();
|
|
if (end < start)
|
|
std::swap(start, end);
|
|
|
|
// split the start node and containing element if the selection starts inside of it
|
|
bool splitStart = isValidCaretPositionInTextNode(start);
|
|
if (splitStart) {
|
|
if (shouldSplitTextElement(start.deprecatedNode()->parentElement(), style))
|
|
splitTextElementAtStart(start, end);
|
|
else
|
|
splitTextAtStart(start, end);
|
|
start = startPosition();
|
|
end = endPosition();
|
|
startDummySpanAncestor = dummySpanAncestorForNode(start.deprecatedNode());
|
|
}
|
|
|
|
// split the end node and containing element if the selection ends inside of it
|
|
bool splitEnd = isValidCaretPositionInTextNode(end);
|
|
if (splitEnd) {
|
|
if (shouldSplitTextElement(end.deprecatedNode()->parentElement(), style))
|
|
splitTextElementAtEnd(start, end);
|
|
else
|
|
splitTextAtEnd(start, end);
|
|
start = startPosition();
|
|
end = endPosition();
|
|
endDummySpanAncestor = dummySpanAncestorForNode(end.deprecatedNode());
|
|
}
|
|
|
|
if (start.isNull() || end.isNull())
|
|
return;
|
|
|
|
// Remove style from the selection.
|
|
// Use the upstream position of the start for removing style.
|
|
// This will ensure we remove all traces of the relevant styles from the selection
|
|
// and prevent us from adding redundant ones, as described in:
|
|
// <rdar://problem/3724344> Bolding and unbolding creates extraneous tags
|
|
Position removeStart = start.upstream();
|
|
auto textDirection = style.textDirection();
|
|
RefPtr<EditingStyle> styleWithoutEmbedding;
|
|
RefPtr<EditingStyle> embeddingStyle;
|
|
if (textDirection) {
|
|
// Leave alone an ancestor that provides the desired single level embedding, if there is one.
|
|
auto startUnsplitAncestor = splitAncestorsWithUnicodeBidi(start.deprecatedNode(), true, *textDirection);
|
|
auto endUnsplitAncestor = splitAncestorsWithUnicodeBidi(end.deprecatedNode(), false, *textDirection);
|
|
removeEmbeddingUpToEnclosingBlock(start.deprecatedNode(), startUnsplitAncestor.get());
|
|
removeEmbeddingUpToEnclosingBlock(end.deprecatedNode(), endUnsplitAncestor.get());
|
|
|
|
// Avoid removing the dir attribute and the unicode-bidi and direction properties from the unsplit ancestors.
|
|
Position embeddingRemoveStart = removeStart;
|
|
if (startUnsplitAncestor && nodeFullySelected(*startUnsplitAncestor, removeStart, end))
|
|
embeddingRemoveStart = positionInParentAfterNode(startUnsplitAncestor.get());
|
|
|
|
Position embeddingRemoveEnd = end;
|
|
if (endUnsplitAncestor && nodeFullySelected(*endUnsplitAncestor, removeStart, end))
|
|
embeddingRemoveEnd = positionInParentBeforeNode(endUnsplitAncestor.get()).downstream();
|
|
|
|
if (embeddingRemoveEnd != removeStart || embeddingRemoveEnd != end) {
|
|
styleWithoutEmbedding = style.copy();
|
|
embeddingStyle = styleWithoutEmbedding->extractAndRemoveTextDirection();
|
|
|
|
if (embeddingRemoveStart <= embeddingRemoveEnd)
|
|
removeInlineStyle(*embeddingStyle, embeddingRemoveStart, embeddingRemoveEnd);
|
|
}
|
|
}
|
|
|
|
removeInlineStyle(styleWithoutEmbedding ? *styleWithoutEmbedding : style, removeStart, end);
|
|
start = startPosition();
|
|
end = endPosition();
|
|
if (start.isNull() || start.isOrphan() || end.isNull() || end.isOrphan())
|
|
return;
|
|
|
|
if (splitStart && mergeStartWithPreviousIfIdentical(start, end)) {
|
|
start = startPosition();
|
|
end = endPosition();
|
|
}
|
|
|
|
if (splitEnd) {
|
|
mergeEndWithNextIfIdentical(start, end);
|
|
start = startPosition();
|
|
end = endPosition();
|
|
}
|
|
|
|
if (start.isNull() || end.isNull())
|
|
return;
|
|
|
|
// update document layout once before running the rest of the function
|
|
// so that we avoid the expense of updating before each and every call
|
|
// to check a computed style
|
|
document().updateLayoutIgnorePendingStylesheets();
|
|
|
|
RefPtr<EditingStyle> styleToApply = &style;
|
|
if (textDirection) {
|
|
// Avoid applying the unicode-bidi and direction properties beneath ancestors that already have them.
|
|
auto embeddingStartNode = highestEmbeddingAncestor(start.deprecatedNode(), enclosingBlock(start.deprecatedNode()));
|
|
auto embeddingEndNode = highestEmbeddingAncestor(end.deprecatedNode(), enclosingBlock(end.deprecatedNode()));
|
|
|
|
if (embeddingStartNode || embeddingEndNode) {
|
|
Position embeddingApplyStart = embeddingStartNode ? positionInParentAfterNode(embeddingStartNode.get()) : start;
|
|
Position embeddingApplyEnd = embeddingEndNode ? positionInParentBeforeNode(embeddingEndNode.get()) : end;
|
|
ASSERT(embeddingApplyStart.isNotNull() && embeddingApplyEnd.isNotNull());
|
|
|
|
if (!embeddingStyle) {
|
|
styleWithoutEmbedding = style.copy();
|
|
embeddingStyle = styleWithoutEmbedding->extractAndRemoveTextDirection();
|
|
}
|
|
fixRangeAndApplyInlineStyle(*embeddingStyle, embeddingApplyStart, embeddingApplyEnd);
|
|
|
|
styleToApply = styleWithoutEmbedding;
|
|
}
|
|
}
|
|
|
|
fixRangeAndApplyInlineStyle(*styleToApply, start, end);
|
|
|
|
// Remove dummy style spans created by splitting text elements.
|
|
cleanupUnstyledAppleStyleSpans(startDummySpanAncestor.get());
|
|
if (endDummySpanAncestor != startDummySpanAncestor)
|
|
cleanupUnstyledAppleStyleSpans(endDummySpanAncestor.get());
|
|
}
|
|
|
|
void ApplyStyleCommand::fixRangeAndApplyInlineStyle(EditingStyle& style, const Position& start, const Position& end)
|
|
{
|
|
auto startNode = makeRefPtr(start.deprecatedNode());
|
|
|
|
if (start.deprecatedEditingOffset() >= caretMaxOffset(*startNode)) {
|
|
startNode = NodeTraversal::next(*startNode);
|
|
if (!startNode || end < firstPositionInOrBeforeNode(startNode.get()))
|
|
return;
|
|
}
|
|
|
|
auto pastEndNode = makeRefPtr(end.deprecatedNode());
|
|
if (end.deprecatedEditingOffset() >= caretMaxOffset(*pastEndNode))
|
|
pastEndNode = NodeTraversal::nextSkippingChildren(*pastEndNode);
|
|
|
|
// FIXME: Callers should perform this operation on a Range that includes the br
|
|
// if they want style applied to the empty line.
|
|
// FIXME: Should this be using startNode instead of start.deprecatedNode()?
|
|
if (start == end && start.deprecatedNode()->hasTagName(brTag))
|
|
pastEndNode = NodeTraversal::next(*start.deprecatedNode());
|
|
|
|
// Start from the highest fully selected ancestor so that we can modify the fully selected node.
|
|
// e.g. When applying font-size: large on <font color="blue">hello</font>, we need to include the font element in our run
|
|
// to generate <font color="blue" size="4">hello</font> instead of <font color="blue"><font size="4">hello</font></font>
|
|
auto range = *makeSimpleRange(start, end);
|
|
auto editableRoot = makeRefPtr(startNode->rootEditableElement());
|
|
if (startNode != editableRoot) {
|
|
while (editableRoot && startNode->parentNode() != editableRoot && isNodeVisiblyContainedWithin(*startNode->parentNode(), range))
|
|
startNode = startNode->parentNode();
|
|
}
|
|
|
|
applyInlineStyleToNodeRange(style, *startNode, pastEndNode.get());
|
|
}
|
|
|
|
static bool containsNonEditableRegion(Node& node)
|
|
{
|
|
if (!node.hasEditableStyle())
|
|
return true;
|
|
|
|
auto sibling = makeRefPtr(NodeTraversal::nextSkippingChildren(node));
|
|
for (auto descendant = makeRefPtr(node.firstChild()); descendant && descendant != sibling; descendant = NodeTraversal::next(*descendant)) {
|
|
if (!descendant->hasEditableStyle())
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
struct InlineRunToApplyStyle {
|
|
InlineRunToApplyStyle(Node* start, Node* end, Node* pastEndNode)
|
|
: start(start)
|
|
, end(end)
|
|
, pastEndNode(pastEndNode)
|
|
{
|
|
ASSERT(start->parentNode() == end->parentNode());
|
|
}
|
|
|
|
bool startAndEndAreStillInDocument()
|
|
{
|
|
return start && end && start->isConnected() && end->isConnected();
|
|
}
|
|
|
|
RefPtr<Node> start;
|
|
RefPtr<Node> end;
|
|
RefPtr<Node> pastEndNode;
|
|
Position positionForStyleComputation;
|
|
RefPtr<Node> dummyElement;
|
|
StyleChange change;
|
|
};
|
|
|
|
void ApplyStyleCommand::applyInlineStyleToNodeRange(EditingStyle& style, Node& startNode, Node* pastEndNode)
|
|
{
|
|
if (m_removeOnly)
|
|
return;
|
|
|
|
document().updateLayoutIgnorePendingStylesheets();
|
|
|
|
Vector<InlineRunToApplyStyle> runs;
|
|
RefPtr<Node> node = &startNode;
|
|
for (RefPtr<Node> next; node && node != pastEndNode; node = next) {
|
|
next = NodeTraversal::next(*node);
|
|
|
|
if (!node->renderer() || !node->hasEditableStyle())
|
|
continue;
|
|
|
|
if (!node->hasRichlyEditableStyle() && is<HTMLElement>(*node)) {
|
|
// This is a plaintext-only region. Only proceed if it's fully selected.
|
|
// pastEndNode is the node after the last fully selected node, so if it's inside node then
|
|
// node isn't fully selected.
|
|
if (pastEndNode && pastEndNode->isDescendantOf(*node))
|
|
break;
|
|
// Add to this element's inline style and skip over its contents.
|
|
HTMLElement& element = downcast<HTMLElement>(*node);
|
|
RefPtr<MutableStyleProperties> inlineStyle = copyStyleOrCreateEmpty(element.inlineStyle());
|
|
if (auto otherStyle = makeRefPtr(style.style()))
|
|
inlineStyle->mergeAndOverrideOnConflict(*otherStyle);
|
|
setNodeAttribute(element, styleAttr, inlineStyle->asText());
|
|
next = NodeTraversal::nextSkippingChildren(*node);
|
|
continue;
|
|
}
|
|
|
|
if (isBlock(node.get()))
|
|
continue;
|
|
|
|
if (node->hasChildNodes()) {
|
|
if (node->contains(pastEndNode) || containsNonEditableRegion(*node) || !node->parentNode()->hasEditableStyle())
|
|
continue;
|
|
if (editingIgnoresContent(*node)) {
|
|
next = NodeTraversal::nextSkippingChildren(*node);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
auto runStart = node;
|
|
auto runEnd = node;
|
|
auto sibling = makeRefPtr(node->nextSibling());
|
|
while (sibling && sibling != pastEndNode && !sibling->contains(pastEndNode) && (!isBlock(sibling.get()) || sibling->hasTagName(brTag)) && !containsNonEditableRegion(*sibling)) {
|
|
runEnd = sibling;
|
|
sibling = runEnd->nextSibling();
|
|
}
|
|
next = NodeTraversal::nextSkippingChildren(*runEnd);
|
|
|
|
auto pastEndNode = makeRefPtr(NodeTraversal::nextSkippingChildren(*runEnd));
|
|
if (!shouldApplyInlineStyleToRun(style, runStart.get(), pastEndNode.get()))
|
|
continue;
|
|
|
|
runs.append(InlineRunToApplyStyle(runStart.get(), runEnd.get(), pastEndNode.get()));
|
|
}
|
|
|
|
for (auto& run : runs) {
|
|
removeConflictingInlineStyleFromRun(style, run.start, run.end, run.pastEndNode.get());
|
|
if (run.startAndEndAreStillInDocument())
|
|
run.positionForStyleComputation = positionToComputeInlineStyleChange(*run.start, run.dummyElement);
|
|
}
|
|
|
|
document().updateLayoutIgnorePendingStylesheets();
|
|
|
|
for (auto& run : runs)
|
|
run.change = StyleChange(&style, run.positionForStyleComputation);
|
|
|
|
for (auto& run : runs) {
|
|
if (run.dummyElement)
|
|
removeNode(*run.dummyElement);
|
|
if (run.startAndEndAreStillInDocument())
|
|
applyInlineStyleChange(run.start.releaseNonNull(), run.end.releaseNonNull(), run.change, AddStyledElement);
|
|
}
|
|
}
|
|
|
|
bool ApplyStyleCommand::isStyledInlineElementToRemove(Element* element) const
|
|
{
|
|
return (m_styledInlineElement && element->hasTagName(m_styledInlineElement->tagQName()))
|
|
|| (m_isInlineElementToRemoveFunction && m_isInlineElementToRemoveFunction(element));
|
|
}
|
|
|
|
bool ApplyStyleCommand::shouldApplyInlineStyleToRun(EditingStyle& style, Node* runStart, Node* pastEndNode)
|
|
{
|
|
ASSERT(runStart);
|
|
|
|
for (auto node = makeRefPtr(runStart); node && node != pastEndNode; node = NodeTraversal::next(*node)) {
|
|
if (node->hasChildNodes())
|
|
continue;
|
|
// We don't consider m_isInlineElementToRemoveFunction here because we never apply style when m_isInlineElementToRemoveFunction is specified
|
|
if (!style.styleIsPresentInComputedStyleOfNode(*node))
|
|
return true;
|
|
if (m_styledInlineElement && !enclosingElementWithTag(positionBeforeNode(node.get()), m_styledInlineElement->tagQName()))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void ApplyStyleCommand::removeConflictingInlineStyleFromRun(EditingStyle& style, RefPtr<Node>& runStart, RefPtr<Node>& runEnd, Node* pastEndNode)
|
|
{
|
|
ASSERT(runStart && runEnd);
|
|
RefPtr<Node> next = runStart;
|
|
for (RefPtr<Node> node = next; node && node->isConnected() && node != pastEndNode; node = next) {
|
|
if (editingIgnoresContent(*node)) {
|
|
ASSERT(!node->contains(pastEndNode));
|
|
next = NodeTraversal::nextSkippingChildren(*node);
|
|
} else
|
|
next = NodeTraversal::next(*node);
|
|
|
|
if (!is<HTMLElement>(*node))
|
|
continue;
|
|
|
|
RefPtr<Node> previousSibling = node->previousSibling();
|
|
RefPtr<Node> nextSibling = node->nextSibling();
|
|
RefPtr<ContainerNode> parent = node->parentNode();
|
|
removeInlineStyleFromElement(style, downcast<HTMLElement>(*node), RemoveAlways);
|
|
if (!node->isConnected()) {
|
|
// FIXME: We might need to update the start and the end of current selection here but need a test.
|
|
if (runStart == node)
|
|
runStart = previousSibling ? previousSibling->nextSibling() : parent->firstChild();
|
|
if (runEnd == node)
|
|
runEnd = nextSibling ? nextSibling->previousSibling() : parent->lastChild();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool ApplyStyleCommand::removeInlineStyleFromElement(EditingStyle& style, HTMLElement& element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)
|
|
{
|
|
if (!element.parentNode() || !isEditableNode(*element.parentNode()))
|
|
return false;
|
|
|
|
if (isStyledInlineElementToRemove(&element)) {
|
|
if (mode == RemoveNone)
|
|
return true;
|
|
if (extractedStyle)
|
|
extractedStyle->mergeInlineStyleOfElement(element, EditingStyle::OverrideValues);
|
|
removeNodePreservingChildren(element);
|
|
return true;
|
|
}
|
|
|
|
bool removed = false;
|
|
if (removeImplicitlyStyledElement(style, element, mode, extractedStyle))
|
|
removed = true;
|
|
|
|
if (!element.isConnected())
|
|
return removed;
|
|
|
|
// If the node was converted to a span, the span may still contain relevant
|
|
// styles which must be removed (e.g. <b style='font-weight: bold'>)
|
|
if (removeCSSStyle(style, element, mode, extractedStyle))
|
|
removed = true;
|
|
|
|
return removed;
|
|
}
|
|
|
|
void ApplyStyleCommand::replaceWithSpanOrRemoveIfWithoutAttributes(HTMLElement& element)
|
|
{
|
|
if (hasNoAttributeOrOnlyStyleAttribute(element, StyleAttributeShouldBeEmpty))
|
|
removeNodePreservingChildren(element);
|
|
else {
|
|
HTMLElement* newSpanElement = replaceElementWithSpanPreservingChildrenAndAttributes(element);
|
|
ASSERT_UNUSED(newSpanElement, newSpanElement && newSpanElement->isConnected());
|
|
}
|
|
}
|
|
|
|
bool ApplyStyleCommand::removeImplicitlyStyledElement(EditingStyle& style, HTMLElement& element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)
|
|
{
|
|
if (mode == RemoveNone) {
|
|
ASSERT(!extractedStyle);
|
|
return style.conflictsWithImplicitStyleOfElement(element) || style.conflictsWithImplicitStyleOfAttributes(element);
|
|
}
|
|
|
|
ASSERT(mode == RemoveIfNeeded || mode == RemoveAlways);
|
|
if (style.conflictsWithImplicitStyleOfElement(element, extractedStyle, mode == RemoveAlways ? EditingStyle::ExtractMatchingStyle : EditingStyle::DoNotExtractMatchingStyle)) {
|
|
replaceWithSpanOrRemoveIfWithoutAttributes(element);
|
|
return true;
|
|
}
|
|
|
|
// unicode-bidi and direction are pushed down separately so don't push down with other styles
|
|
Vector<QualifiedName> attributes;
|
|
if (!style.extractConflictingImplicitStyleOfAttributes(element, extractedStyle ? EditingStyle::PreserveWritingDirection : EditingStyle::DoNotPreserveWritingDirection, extractedStyle, attributes, mode == RemoveAlways ? EditingStyle::ExtractMatchingStyle : EditingStyle::DoNotExtractMatchingStyle))
|
|
return false;
|
|
|
|
for (auto& attribute : attributes)
|
|
removeNodeAttribute(element, attribute);
|
|
|
|
if (isEmptyFontTag(&element) || isSpanWithoutAttributesOrUnstyledStyleSpan(element))
|
|
removeNodePreservingChildren(element);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool ApplyStyleCommand::removeCSSStyle(EditingStyle& style, HTMLElement& element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)
|
|
{
|
|
if (mode == RemoveNone)
|
|
return style.conflictsWithInlineStyleOfElement(element);
|
|
|
|
RefPtr<MutableStyleProperties> newInlineStyle;
|
|
if (!style.conflictsWithInlineStyleOfElement(element, newInlineStyle, extractedStyle))
|
|
return false;
|
|
|
|
if (newInlineStyle->isEmpty())
|
|
removeNodeAttribute(element, styleAttr);
|
|
else
|
|
setNodeAttribute(element, styleAttr, newInlineStyle->asText());
|
|
|
|
if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))
|
|
removeNodePreservingChildren(element);
|
|
|
|
return true;
|
|
}
|
|
|
|
RefPtr<HTMLElement> ApplyStyleCommand::highestAncestorWithConflictingInlineStyle(EditingStyle& style, Node* node)
|
|
{
|
|
if (!node)
|
|
return nullptr;
|
|
|
|
RefPtr<HTMLElement> result;
|
|
auto unsplittableElement = makeRefPtr(unsplittableElementForPosition(firstPositionInOrBeforeNode(node)));
|
|
|
|
for (auto ancestor = makeRefPtr(node); ancestor; ancestor = ancestor->parentNode()) {
|
|
if (is<HTMLElement>(*ancestor) && shouldRemoveInlineStyleFromElement(style, downcast<HTMLElement>(*ancestor)))
|
|
result = static_pointer_cast<HTMLElement>(ancestor);
|
|
// Should stop at the editable root (cannot cross editing boundary) and
|
|
// also stop at the unsplittable element to be consistent with other UAs
|
|
if (ancestor == unsplittableElement)
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void ApplyStyleCommand::applyInlineStyleToPushDown(Node& node, EditingStyle* style)
|
|
{
|
|
node.document().updateStyleIfNeeded();
|
|
|
|
if (!style || style->isEmpty() || !node.renderer() || is<HTMLIFrameElement>(node))
|
|
return;
|
|
|
|
RefPtr<EditingStyle> newInlineStyle = style;
|
|
if (is<HTMLElement>(node) && downcast<HTMLElement>(node).inlineStyle()) {
|
|
newInlineStyle = style->copy();
|
|
newInlineStyle->mergeInlineStyleOfElement(downcast<HTMLElement>(node), EditingStyle::OverrideValues);
|
|
}
|
|
|
|
// Since addInlineStyleIfNeeded can't add styles to block-flow render objects, add style attribute instead.
|
|
// FIXME: applyInlineStyleToRange should be used here instead.
|
|
if ((node.renderer()->isRenderBlockFlow() || node.hasChildNodes()) && is<HTMLElement>(node)) {
|
|
setNodeAttribute(downcast<HTMLElement>(node), styleAttr, newInlineStyle->style()->asText());
|
|
return;
|
|
}
|
|
|
|
{
|
|
ScriptDisallowedScope::InMainThread scriptDisallowedScope;
|
|
|
|
if (node.renderer()->isText() && static_cast<RenderText*>(node.renderer())->isAllCollapsibleWhitespace())
|
|
return;
|
|
if (node.renderer()->isBR() && !node.renderer()->style().preserveNewline())
|
|
return;
|
|
}
|
|
|
|
// We can't wrap node with the styled element here because new styled element will never be removed if we did.
|
|
// If we modified the child pointer in pushDownInlineStyleAroundNode to point to new style element
|
|
// then we fall into an infinite loop where we keep removing and adding styled element wrapping node.
|
|
addInlineStyleIfNeeded(newInlineStyle.get(), node, node, DoNotAddStyledElement);
|
|
}
|
|
|
|
void ApplyStyleCommand::pushDownInlineStyleAroundNode(EditingStyle& style, Node* targetNode)
|
|
{
|
|
auto highestAncestor = highestAncestorWithConflictingInlineStyle(style, targetNode);
|
|
if (!highestAncestor)
|
|
return;
|
|
|
|
// The outer loop is traversing the tree vertically from highestAncestor to targetNode
|
|
RefPtr<Node> current = highestAncestor;
|
|
// Along the way, styled elements that contain targetNode are removed and accumulated into elementsToPushDown.
|
|
// Each child of the removed element, exclusing ancestors of targetNode, is then wrapped by clones of elements in elementsToPushDown.
|
|
Vector<Ref<Element>> elementsToPushDown;
|
|
while (current && current != targetNode && current->contains(targetNode)) {
|
|
auto currentChildren = collectChildNodes(*current);
|
|
|
|
RefPtr<StyledElement> styledElement;
|
|
if (is<StyledElement>(*current) && isStyledInlineElementToRemove(downcast<Element>(current.get()))) {
|
|
styledElement = downcast<StyledElement>(current.get());
|
|
elementsToPushDown.append(*styledElement);
|
|
}
|
|
|
|
auto styleToPushDown = EditingStyle::create();
|
|
if (is<HTMLElement>(*current))
|
|
removeInlineStyleFromElement(style, downcast<HTMLElement>(*current), RemoveIfNeeded, styleToPushDown.ptr());
|
|
|
|
// The inner loop will go through children on each level
|
|
// FIXME: we should aggregate inline child elements together so that we don't wrap each child separately.
|
|
for (Ref<Node>& childRef : currentChildren) {
|
|
Node& child = childRef;
|
|
if (!child.parentNode())
|
|
continue;
|
|
if (!child.contains(targetNode) && elementsToPushDown.size()) {
|
|
for (auto& element : elementsToPushDown) {
|
|
auto wrapper = element->cloneElementWithoutChildren(document());
|
|
wrapper->removeAttribute(styleAttr);
|
|
surroundNodeRangeWithElement(child, child, WTFMove(wrapper));
|
|
}
|
|
}
|
|
|
|
// Apply style to all nodes containing targetNode and their siblings but NOT to targetNode
|
|
// But if we've removed styledElement then always apply the style.
|
|
if (&child != targetNode || styledElement)
|
|
applyInlineStyleToPushDown(child, styleToPushDown.ptr());
|
|
|
|
// We found the next node for the outer loop (contains targetNode)
|
|
// When reached targetNode, stop the outer loop upon the completion of the current inner loop
|
|
if (&child == targetNode || child.contains(targetNode))
|
|
current = &child;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ApplyStyleCommand::removeInlineStyle(EditingStyle& style, const Position& start, const Position& end)
|
|
{
|
|
ASSERT(start.isNotNull());
|
|
ASSERT(end.isNotNull());
|
|
ASSERT(start.anchorNode()->isConnected());
|
|
ASSERT(end.anchorNode()->isConnected());
|
|
ASSERT(is_lteq(treeOrder<ShadowIncludingTree>(start, end)));
|
|
// FIXME: We should assert that start/end are not in the middle of a text node.
|
|
|
|
Position pushDownStart = start.downstream();
|
|
// If the pushDownStart is at the end of a text node, then this node is not fully selected.
|
|
// Move it to the next deep quivalent position to avoid removing the style from this node.
|
|
// e.g. if pushDownStart was at Position("hello", 5) in <b>hello<div>world</div></b>, we want Position("world", 0) instead.
|
|
auto pushDownStartContainer = makeRefPtr(pushDownStart.containerNode());
|
|
if (is<Text>(pushDownStartContainer) && static_cast<unsigned>(pushDownStart.computeOffsetInContainerNode()) == downcast<Text>(*pushDownStartContainer).length())
|
|
pushDownStart = nextVisuallyDistinctCandidate(pushDownStart);
|
|
// If pushDownEnd is at the start of a text node, then this node is not fully selected.
|
|
// Move it to the previous deep equivalent position to avoid removing the style from this node.
|
|
Position pushDownEnd = end.upstream();
|
|
auto pushDownEndContainer = makeRefPtr(pushDownEnd.containerNode());
|
|
if (is<Text>(pushDownEndContainer) && !pushDownEnd.computeOffsetInContainerNode())
|
|
pushDownEnd = previousVisuallyDistinctCandidate(pushDownEnd);
|
|
|
|
pushDownInlineStyleAroundNode(style, pushDownStart.deprecatedNode());
|
|
pushDownInlineStyleAroundNode(style, pushDownEnd.deprecatedNode());
|
|
|
|
// The s and e variables store the positions used to set the ending selection after style removal
|
|
// takes place. This will help callers to recognize when either the start node or the end node
|
|
// are removed from the document during the work of this function.
|
|
// If pushDownInlineStyleAroundNode has pruned start.deprecatedNode() or end.deprecatedNode(),
|
|
// use pushDownStart or pushDownEnd instead, which pushDownInlineStyleAroundNode won't prune.
|
|
Position s = start.isNull() || start.isOrphan() ? pushDownStart : start;
|
|
Position e = end.isNull() || end.isOrphan() ? pushDownEnd : end;
|
|
|
|
RefPtr<Node> node = start.deprecatedNode();
|
|
while (node) {
|
|
RefPtr<Node> next;
|
|
if (editingIgnoresContent(*node)) {
|
|
ASSERT(node == end.deprecatedNode() || !node->contains(end.deprecatedNode()));
|
|
next = NodeTraversal::nextSkippingChildren(*node);
|
|
} else
|
|
next = NodeTraversal::next(*node);
|
|
|
|
if (is<HTMLElement>(*node) && nodeFullySelected(downcast<HTMLElement>(*node), start, end)) {
|
|
Ref<HTMLElement> element = downcast<HTMLElement>(*node);
|
|
RefPtr<Node> prev = NodeTraversal::previousPostOrder(element);
|
|
RefPtr<Node> next = NodeTraversal::next(element);
|
|
RefPtr<EditingStyle> styleToPushDown;
|
|
RefPtr<Node> childNode;
|
|
if (isStyledInlineElementToRemove(element.ptr())) {
|
|
styleToPushDown = EditingStyle::create();
|
|
childNode = element->firstChild();
|
|
}
|
|
|
|
removeInlineStyleFromElement(style, element, RemoveIfNeeded, styleToPushDown.get());
|
|
if (!element->isConnected()) {
|
|
if (s.deprecatedNode() == element.ptr()) {
|
|
// Since elem must have been fully selected, and it is at the start
|
|
// of the selection, it is clear we can set the new s offset to 0.
|
|
ASSERT(s.anchorType() == Position::PositionIsBeforeAnchor || s.offsetInContainerNode() <= 0);
|
|
s = firstPositionInOrBeforeNode(next.get());
|
|
}
|
|
if (e.deprecatedNode() == element.ptr()) {
|
|
// Since elem must have been fully selected, and it is at the end
|
|
// of the selection, it is clear we can set the new e offset to
|
|
// the max range offset of prev.
|
|
ASSERT(s.anchorType() == Position::PositionIsAfterAnchor || !offsetIsBeforeLastNodeOffset(s.offsetInContainerNode(), s.containerNode()));
|
|
e = lastPositionInOrAfterNode(prev.get());
|
|
}
|
|
}
|
|
|
|
if (styleToPushDown) {
|
|
for (; childNode; childNode = childNode->nextSibling())
|
|
applyInlineStyleToPushDown(*childNode, styleToPushDown.get());
|
|
}
|
|
}
|
|
if (node == end.deprecatedNode())
|
|
break;
|
|
node = next.get();
|
|
}
|
|
|
|
updateStartEnd(s, e);
|
|
}
|
|
|
|
bool ApplyStyleCommand::nodeFullySelected(Element& element, const Position& start, const Position& end) const
|
|
{
|
|
// The tree may have changed and Position::upstream() relies on an up-to-date layout.
|
|
element.document().updateLayoutIgnorePendingStylesheets();
|
|
return firstPositionInOrBeforeNode(&element) >= start && lastPositionInOrAfterNode(&element).upstream() <= end;
|
|
}
|
|
|
|
bool ApplyStyleCommand::nodeFullyUnselected(Element& element, const Position& start, const Position& end) const
|
|
{
|
|
// The tree may have changed and Position::upstream() relies on an up-to-date layout.
|
|
element.document().updateLayoutIgnorePendingStylesheets();
|
|
return lastPositionInOrAfterNode(&element).upstream() < start || firstPositionInOrBeforeNode(&element) > end;
|
|
}
|
|
|
|
void ApplyStyleCommand::splitTextAtStart(const Position& start, const Position& end)
|
|
{
|
|
ASSERT(is<Text>(start.containerNode()));
|
|
|
|
Position newEnd;
|
|
if (end.anchorType() == Position::PositionIsOffsetInAnchor && start.containerNode() == end.containerNode())
|
|
newEnd = Position(end.containerText(), end.offsetInContainerNode() - start.offsetInContainerNode());
|
|
else
|
|
newEnd = end;
|
|
|
|
RefPtr<Text> text = start.containerText();
|
|
splitTextNode(*text, start.offsetInContainerNode());
|
|
updateStartEnd(firstPositionInNode(text.get()), newEnd);
|
|
}
|
|
|
|
void ApplyStyleCommand::splitTextAtEnd(const Position& start, const Position& end)
|
|
{
|
|
ASSERT(is<Text>(end.containerNode()));
|
|
|
|
bool shouldUpdateStart = start.anchorType() == Position::PositionIsOffsetInAnchor && start.containerNode() == end.containerNode();
|
|
Text& text = downcast<Text>(*end.deprecatedNode());
|
|
splitTextNode(text, end.offsetInContainerNode());
|
|
|
|
Node* prevNode = text.previousSibling();
|
|
if (!is<Text>(prevNode))
|
|
return;
|
|
|
|
Position newStart = shouldUpdateStart ? Position(downcast<Text>(prevNode), start.offsetInContainerNode()) : start;
|
|
updateStartEnd(newStart, lastPositionInNode(prevNode));
|
|
}
|
|
|
|
void ApplyStyleCommand::splitTextElementAtStart(const Position& start, const Position& end)
|
|
{
|
|
ASSERT(is<Text>(start.containerNode()));
|
|
|
|
Position newEnd;
|
|
if (start.containerNode() == end.containerNode())
|
|
newEnd = Position(end.containerText(), end.offsetInContainerNode() - start.offsetInContainerNode());
|
|
else
|
|
newEnd = end;
|
|
|
|
splitTextNodeContainingElement(*start.containerText(), start.offsetInContainerNode());
|
|
updateStartEnd(positionBeforeNode(start.containerNode()), newEnd);
|
|
}
|
|
|
|
void ApplyStyleCommand::splitTextElementAtEnd(const Position& start, const Position& end)
|
|
{
|
|
ASSERT(is<Text>(end.containerNode()));
|
|
|
|
bool shouldUpdateStart = start.containerNode() == end.containerNode();
|
|
splitTextNodeContainingElement(*end.containerText(), end.offsetInContainerNode());
|
|
|
|
Node* parentElement = end.containerNode()->parentNode();
|
|
if (!parentElement || !parentElement->previousSibling())
|
|
return;
|
|
Node* firstTextNode = parentElement->previousSibling()->lastChild();
|
|
if (!is<Text>(firstTextNode))
|
|
return;
|
|
|
|
Position newStart = shouldUpdateStart ? Position(downcast<Text>(firstTextNode), start.offsetInContainerNode()) : start;
|
|
updateStartEnd(newStart, positionAfterNode(firstTextNode));
|
|
}
|
|
|
|
bool ApplyStyleCommand::shouldSplitTextElement(Element* element, EditingStyle& style)
|
|
{
|
|
if (!is<HTMLElement>(element))
|
|
return false;
|
|
|
|
return shouldRemoveInlineStyleFromElement(style, downcast<HTMLElement>(*element));
|
|
}
|
|
|
|
bool ApplyStyleCommand::isValidCaretPositionInTextNode(const Position& position)
|
|
{
|
|
Node* node = position.containerNode();
|
|
if (position.anchorType() != Position::PositionIsOffsetInAnchor || !is<Text>(node))
|
|
return false;
|
|
int offsetInText = position.offsetInContainerNode();
|
|
return offsetInText > caretMinOffset(*node) && offsetInText < caretMaxOffset(*node);
|
|
}
|
|
|
|
bool ApplyStyleCommand::mergeStartWithPreviousIfIdentical(const Position& start, const Position& end)
|
|
{
|
|
auto startNode = makeRefPtr(start.containerNode());
|
|
if (start.computeOffsetInContainerNode())
|
|
return false;
|
|
|
|
if (isAtomicNode(startNode.get())) {
|
|
// note: prior siblings could be unrendered elements. it's silly to miss the
|
|
// merge opportunity just for that.
|
|
if (startNode->previousSibling())
|
|
return false;
|
|
|
|
startNode = startNode->parentNode();
|
|
}
|
|
|
|
auto previousSibling = makeRefPtr(startNode->previousSibling());
|
|
if (!previousSibling || !areIdenticalElements(*startNode, *previousSibling))
|
|
return false;
|
|
|
|
auto& previousElement = downcast<Element>(*previousSibling);
|
|
auto& element = downcast<Element>(*startNode);
|
|
auto* startChild = element.firstChild();
|
|
ASSERT(startChild);
|
|
mergeIdenticalElements(previousElement, element);
|
|
|
|
// FIXME: Inconsistent that we use computeOffsetInContainerNode for start, but deprecatedEditingOffset for end.
|
|
unsigned startOffset = startChild->computeNodeIndex();
|
|
unsigned endOffset = end.deprecatedEditingOffset() + (startNode == end.deprecatedNode() ? startOffset : 0);
|
|
updateStartEnd({ startNode.get(), startOffset, Position::PositionIsOffsetInAnchor },
|
|
{ end.deprecatedNode(), endOffset, Position::PositionIsOffsetInAnchor });
|
|
return true;
|
|
}
|
|
|
|
bool ApplyStyleCommand::mergeEndWithNextIfIdentical(const Position& start, const Position& end)
|
|
{
|
|
auto endNode = makeRefPtr(end.containerNode());
|
|
|
|
if (isAtomicNode(endNode.get())) {
|
|
int endOffset = end.computeOffsetInContainerNode();
|
|
if (offsetIsBeforeLastNodeOffset(endOffset, endNode.get()) || end.deprecatedNode()->nextSibling())
|
|
return false;
|
|
|
|
endNode = end.deprecatedNode()->parentNode();
|
|
}
|
|
|
|
if (endNode->hasTagName(brTag))
|
|
return false;
|
|
|
|
auto nextSibling = makeRefPtr(endNode->nextSibling());
|
|
if (!nextSibling || !areIdenticalElements(*endNode, *nextSibling))
|
|
return false;
|
|
|
|
auto& nextElement = downcast<Element>(*nextSibling);
|
|
auto& element = downcast<Element>(*endNode);
|
|
Node* nextChild = nextElement.firstChild();
|
|
|
|
mergeIdenticalElements(element, nextElement);
|
|
|
|
bool shouldUpdateStart = start.containerNode() == endNode;
|
|
unsigned endOffset = nextChild ? nextChild->computeNodeIndex() : nextElement.countChildNodes();
|
|
updateStartEnd(shouldUpdateStart ? Position(&nextElement, start.offsetInContainerNode(), Position::PositionIsOffsetInAnchor) : start,
|
|
{ &nextElement, endOffset, Position::PositionIsOffsetInAnchor });
|
|
return true;
|
|
}
|
|
|
|
bool ApplyStyleCommand::surroundNodeRangeWithElement(Node& startNode, Node& endNode, Ref<Element>&& elementToInsert)
|
|
{
|
|
Ref<Node> protectedStartNode = startNode;
|
|
Ref<Element> element = WTFMove(elementToInsert);
|
|
|
|
insertNodeBefore(element.copyRef(), startNode);
|
|
if (!element->isContentRichlyEditable()) {
|
|
removeNode(element);
|
|
return false;
|
|
}
|
|
|
|
RefPtr<Node> node = &startNode;
|
|
while (node) {
|
|
RefPtr<Node> next = node->nextSibling();
|
|
if (isEditableNode(*node)) {
|
|
removeNode(*node);
|
|
appendNode(*node, element.copyRef());
|
|
}
|
|
if (node == &endNode)
|
|
break;
|
|
node = next;
|
|
}
|
|
|
|
RefPtr<Node> nextSibling = element->nextSibling();
|
|
RefPtr<Node> previousSibling = element->previousSibling();
|
|
|
|
if (nextSibling && nextSibling->hasEditableStyle() && areIdenticalElements(element, *nextSibling))
|
|
mergeIdenticalElements(element, downcast<Element>(*nextSibling));
|
|
|
|
if (is<Element>(previousSibling) && previousSibling->hasEditableStyle()) {
|
|
auto mergedElement = makeRefPtr(previousSibling->nextSibling());
|
|
ASSERT(mergedElement);
|
|
if (mergedElement->hasEditableStyle() && areIdenticalElements(*previousSibling, *mergedElement))
|
|
mergeIdenticalElements(downcast<Element>(*previousSibling), downcast<Element>(*mergedElement));
|
|
}
|
|
|
|
// FIXME: We should probably call updateStartEnd if the start or end was in the node
|
|
// range so that the endingSelection() is canonicalized. See the comments at the end of
|
|
// VisibleSelection::validate().
|
|
return true;
|
|
}
|
|
|
|
static String joinWithSpace(const String& a, const String& b)
|
|
{
|
|
if (a.isEmpty())
|
|
return b;
|
|
if (b.isEmpty())
|
|
return a;
|
|
return makeString(a, ' ', b);
|
|
}
|
|
|
|
void ApplyStyleCommand::addBlockStyle(const StyleChange& styleChange, HTMLElement& block)
|
|
{
|
|
// Do not check for legacy styles here. Those styles, like <B> and <I>, only apply for inline content.
|
|
ASSERT(styleChange.cssStyle());
|
|
setNodeAttribute(block, styleAttr, joinWithSpace(styleChange.cssStyle()->asText(), block.getAttribute(styleAttr)));
|
|
}
|
|
|
|
void ApplyStyleCommand::addInlineStyleIfNeeded(EditingStyle* style, Node& start, Node& end, EAddStyledElement addStyledElement)
|
|
{
|
|
if (!start.isConnected() || !end.isConnected())
|
|
return;
|
|
|
|
Ref<Node> protectedStart = start;
|
|
RefPtr<Node> dummyElement;
|
|
StyleChange styleChange(style, positionToComputeInlineStyleChange(start, dummyElement));
|
|
|
|
if (dummyElement)
|
|
removeNode(*dummyElement);
|
|
|
|
applyInlineStyleChange(start, end, styleChange, addStyledElement);
|
|
}
|
|
|
|
Position ApplyStyleCommand::positionToComputeInlineStyleChange(Node& startNode, RefPtr<Node>& dummyElement)
|
|
{
|
|
// It's okay to obtain the style at the startNode because we've removed all relevant styles from the current run.
|
|
if (!is<Element>(startNode)) {
|
|
dummyElement = createStyleSpanElement(document());
|
|
insertNodeAt(*dummyElement, positionBeforeNode(&startNode));
|
|
return firstPositionInOrBeforeNode(dummyElement.get());
|
|
}
|
|
|
|
return firstPositionInOrBeforeNode(&startNode);
|
|
}
|
|
|
|
void ApplyStyleCommand::applyInlineStyleChange(Node& passedStart, Node& passedEnd, StyleChange& styleChange, EAddStyledElement addStyledElement)
|
|
{
|
|
RefPtr<Node> startNode = &passedStart;
|
|
RefPtr<Node> endNode = &passedEnd;
|
|
ASSERT(startNode->isConnected());
|
|
ASSERT(endNode->isConnected());
|
|
|
|
// Find appropriate font and span elements top-down.
|
|
RefPtr<HTMLFontElement> fontContainer;
|
|
RefPtr<HTMLElement> styleContainer;
|
|
while (startNode == endNode) {
|
|
if (is<HTMLElement>(*startNode)) {
|
|
auto& container = downcast<HTMLElement>(*startNode);
|
|
if (is<HTMLFontElement>(container))
|
|
fontContainer = &downcast<HTMLFontElement>(container);
|
|
if (is<HTMLSpanElement>(container) || (!is<HTMLSpanElement>(styleContainer) && container.hasChildNodes()))
|
|
styleContainer = &container;
|
|
}
|
|
auto* startNodeFirstChild = startNode->firstChild();
|
|
if (!startNodeFirstChild)
|
|
break;
|
|
endNode = startNode->lastChild();
|
|
startNode = startNodeFirstChild;
|
|
}
|
|
|
|
// Font tags need to go outside of CSS so that CSS font sizes override leagcy font sizes.
|
|
if (styleChange.applyFontColor() || styleChange.applyFontFace() || styleChange.applyFontSize()) {
|
|
if (fontContainer) {
|
|
if (styleChange.applyFontColor())
|
|
setNodeAttribute(*fontContainer, colorAttr, styleChange.fontColor());
|
|
if (styleChange.applyFontFace())
|
|
setNodeAttribute(*fontContainer, faceAttr, styleChange.fontFace());
|
|
if (styleChange.applyFontSize())
|
|
setNodeAttribute(*fontContainer, sizeAttr, styleChange.fontSize());
|
|
} else {
|
|
auto fontElement = createFontElement(document());
|
|
if (styleChange.applyFontColor())
|
|
fontElement->setAttributeWithoutSynchronization(colorAttr, styleChange.fontColor());
|
|
if (styleChange.applyFontFace())
|
|
fontElement->setAttributeWithoutSynchronization(faceAttr, styleChange.fontFace());
|
|
if (styleChange.applyFontSize())
|
|
fontElement->setAttributeWithoutSynchronization(sizeAttr, styleChange.fontSize());
|
|
surroundNodeRangeWithElement(*startNode, *endNode, WTFMove(fontElement));
|
|
}
|
|
}
|
|
|
|
if (auto styleToMerge = styleChange.cssStyle()) {
|
|
if (styleContainer) {
|
|
if (auto existingStyle = styleContainer->inlineStyle()) {
|
|
auto inlineStyle = EditingStyle::create(existingStyle);
|
|
inlineStyle->overrideWithStyle(*styleToMerge);
|
|
setNodeAttribute(*styleContainer, styleAttr, inlineStyle->style()->asText());
|
|
} else
|
|
setNodeAttribute(*styleContainer, styleAttr, styleToMerge->asText());
|
|
} else {
|
|
auto styleElement = createStyleSpanElement(document());
|
|
styleElement->setAttribute(styleAttr, styleToMerge->asText());
|
|
surroundNodeRangeWithElement(*startNode, *endNode, WTFMove(styleElement));
|
|
}
|
|
}
|
|
|
|
if (styleChange.applyBold())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), bTag));
|
|
|
|
if (styleChange.applyItalic())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), iTag));
|
|
|
|
if (styleChange.applyUnderline())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), uTag));
|
|
|
|
if (styleChange.applyLineThrough())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), strikeTag));
|
|
|
|
if (styleChange.applySubscript())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), subTag));
|
|
else if (styleChange.applySuperscript())
|
|
surroundNodeRangeWithElement(*startNode, *endNode, createHTMLElement(document(), supTag));
|
|
|
|
if (m_styledInlineElement && addStyledElement == AddStyledElement)
|
|
surroundNodeRangeWithElement(*startNode, *endNode, m_styledInlineElement->cloneElementWithoutChildren(document()));
|
|
}
|
|
|
|
float ApplyStyleCommand::computedFontSize(Node* node)
|
|
{
|
|
if (!node)
|
|
return 0;
|
|
|
|
auto value = ComputedStyleExtractor(node).propertyValue(CSSPropertyFontSize);
|
|
if (!value)
|
|
return 0;
|
|
return downcast<CSSPrimitiveValue>(*value).floatValue(CSSUnitType::CSS_PX);
|
|
}
|
|
|
|
void ApplyStyleCommand::joinChildTextNodes(Node* node, const Position& start, const Position& end)
|
|
{
|
|
if (!node)
|
|
return;
|
|
|
|
Position newStart = start;
|
|
Position newEnd = end;
|
|
|
|
Vector<Ref<Text>> textNodes;
|
|
for (Text* textNode = TextNodeTraversal::firstChild(*node); textNode; textNode = TextNodeTraversal::nextSibling(*textNode))
|
|
textNodes.append(*textNode);
|
|
|
|
for (auto& childText : textNodes) {
|
|
auto next = makeRefPtr(childText->nextSibling());
|
|
if (!is<Text>(next))
|
|
continue;
|
|
|
|
Text& nextText = downcast<Text>(*next);
|
|
if (start.anchorType() == Position::PositionIsOffsetInAnchor && next == start.containerNode())
|
|
newStart = Position(childText.ptr(), childText->length() + start.offsetInContainerNode());
|
|
if (end.anchorType() == Position::PositionIsOffsetInAnchor && next == end.containerNode())
|
|
newEnd = Position(childText.ptr(), childText->length() + end.offsetInContainerNode());
|
|
String textToMove = nextText.data();
|
|
insertTextIntoNode(childText, childText->length(), textToMove);
|
|
removeNode(*next);
|
|
// don't move child node pointer. it may want to merge with more text nodes.
|
|
}
|
|
|
|
updateStartEnd(newStart, newEnd);
|
|
}
|
|
|
|
}
|