Source/core/editing/ApplyStyleCommand.cpp - Issue 1294543005: Move execCommand related files in core/editing/ related files into core/editing/commands/

Unified Diff: Source/core/editing/ApplyStyleCommand.cpp

Issue 1294543005: Move execCommand related files in core/editing/ related files into core/editing/commands/ (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: 2015-08-18T14:20:58 Rebase for merging code style fixes Created 5 years, 4 months ago

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Index: Source/core/editing/ApplyStyleCommand.cpp

diff --git a/Source/core/editing/ApplyStyleCommand.cpp b/Source/core/editing/ApplyStyleCommand.cpp

deleted file mode 100644

index 57027235707cdc4338c91a3589d8f65e9a83763c..0000000000000000000000000000000000000000

--- a/Source/core/editing/ApplyStyleCommand.cpp

+++ /dev/null

@@ -1,1603 +0,0 @@

-/*

- *

- * 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 COMPUTER, INC. ``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 COMPUTER, INC. OR

- * 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 "core/editing/ApplyStyleCommand.h"

-#include "core/CSSPropertyNames.h"

-#include "core/CSSValueKeywords.h"

-#include "core/HTMLNames.h"

-#include "core/css/CSSComputedStyleDeclaration.h"

-#include "core/css/CSSValuePool.h"

-#include "core/css/StylePropertySet.h"

-#include "core/dom/Document.h"

-#include "core/dom/NodeList.h"

-#include "core/dom/NodeTraversal.h"

-#include "core/dom/Range.h"

-#include "core/dom/Text.h"

-#include "core/editing/EditingStyle.h"

-#include "core/editing/EditingUtilities.h"

-#include "core/editing/PlainTextRange.h"

-#include "core/editing/VisibleUnits.h"

-#include "core/editing/iterators/TextIterator.h"

-#include "core/editing/serializers/HTMLInterchange.h"

-#include "core/frame/UseCounter.h"

-#include "core/html/HTMLFontElement.h"

-#include "core/html/HTMLSpanElement.h"

-#include "core/layout/LayoutObject.h"

-#include "core/layout/LayoutText.h"

-#include "platform/heap/Handle.h"

-#include "wtf/StdLibExtras.h"

-#include "wtf/text/StringBuilder.h"

-namespace blink {

-using namespace HTMLNames;

-static String& styleSpanClassString()

- DEFINE_STATIC_LOCAL(String, styleSpanClassString, ((AppleStyleSpanClass)));

- return styleSpanClassString;

-bool isLegacyAppleHTMLSpanElement(const Node* node)

- if (!isHTMLSpanElement(node))

- return false;

- const HTMLSpanElement& span = toHTMLSpanElement(*node);

- if (span.getAttribute(classAttr) != styleSpanClassString())

- return false;

- UseCounter::count(span.document(), UseCounter::EditingAppleStyleSpanClass);

- return true;

-static bool hasNoAttributeOrOnlyStyleAttribute(const HTMLElement* element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)

- AttributeCollection attributes = element->attributes();

- if (attributes.isEmpty())

- return true;

- unsigned matchedAttributes = 0;

- if (element->getAttribute(classAttr) == styleSpanClassString())

- matchedAttributes++;

- if (element->hasAttribute(styleAttr) && (shouldStyleAttributeBeEmpty == AllowNonEmptyStyleAttribute

- || !element->inlineStyle() || element->inlineStyle()->isEmpty()))

- matchedAttributes++;

- ASSERT(matchedAttributes <= attributes.size());

- return matchedAttributes == attributes.size();

-bool isStyleSpanOrSpanWithOnlyStyleAttribute(const Element* element)

- if (!isHTMLSpanElement(element))

- return false;

- return hasNoAttributeOrOnlyStyleAttribute(toHTMLSpanElement(element), AllowNonEmptyStyleAttribute);

-static inline bool isSpanWithoutAttributesOrUnstyledStyleSpan(const Node* node)

- if (!isHTMLSpanElement(node))

- return false;

- return hasNoAttributeOrOnlyStyleAttribute(toHTMLSpanElement(node), StyleAttributeShouldBeEmpty);

-bool isEmptyFontTag(const Element* element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)

- if (!isHTMLFontElement(element))

- return false;

- return hasNoAttributeOrOnlyStyleAttribute(toHTMLFontElement(element), shouldStyleAttributeBeEmpty);

-static PassRefPtrWillBeRawPtr<HTMLFontElement> createFontElement(Document& document)

- return toHTMLFontElement(createHTMLElement(document, fontTag).get());

-PassRefPtrWillBeRawPtr<HTMLSpanElement> createStyleSpanElement(Document& document)

- return toHTMLSpanElement(createHTMLElement(document, spanTag).get());

-ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, EditAction editingAction, EPropertyLevel propertyLevel)

- : CompositeEditCommand(document)

- , m_style(style->copy())

- , m_editingAction(editingAction)

- , m_propertyLevel(propertyLevel)

- , m_start(endingSelection().start().downstream())

- , m_end(endingSelection().end().upstream())

- , m_useEndingSelection(true)

- , m_styledInlineElement(nullptr)

- , m_removeOnly(false)

- , m_isInlineElementToRemoveFunction(0)

-ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, const Position& start, const Position& end, EditAction editingAction, EPropertyLevel propertyLevel)

- : CompositeEditCommand(document)

- , m_style(style->copy())

- , m_editingAction(editingAction)

- , m_propertyLevel(propertyLevel)

- , m_start(start)

- , m_end(end)

- , m_useEndingSelection(false)

- , m_styledInlineElement(nullptr)

- , m_removeOnly(false)

- , m_isInlineElementToRemoveFunction(0)

-ApplyStyleCommand::ApplyStyleCommand(PassRefPtrWillBeRawPtr<Element> element, bool removeOnly, EditAction editingAction)

- : CompositeEditCommand(element->document())

- , m_style(EditingStyle::create())

- , m_editingAction(editingAction)

- , m_propertyLevel(PropertyDefault)

- , m_start(endingSelection().start().downstream())

- , m_end(endingSelection().end().upstream())

- , m_useEndingSelection(true)

- , m_styledInlineElement(element)

- , m_removeOnly(removeOnly)

- , m_isInlineElementToRemoveFunction(0)

-ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, IsInlineElementToRemoveFunction isInlineElementToRemoveFunction, EditAction editingAction)

- : CompositeEditCommand(document)

- , m_style(style->copy())

- , m_editingAction(editingAction)

- , m_propertyLevel(PropertyDefault)

- , m_start(endingSelection().start().downstream())

- , m_end(endingSelection().end().upstream())

- , m_useEndingSelection(true)

- , m_styledInlineElement(nullptr)

- , m_removeOnly(true)

- , m_isInlineElementToRemoveFunction(isInlineElementToRemoveFunction)

-void ApplyStyleCommand::updateStartEnd(const Position& newStart, const Position& newEnd)

- ASSERT(comparePositions(newEnd, newStart) >= 0);

- if (!m_useEndingSelection && (newStart != m_start || newEnd != m_end))

- m_useEndingSelection = true;

- setEndingSelection(VisibleSelection(newStart, newEnd, VP_DEFAULT_AFFINITY, endingSelection().isDirectional()));

- m_start = newStart;

- m_end = newEnd;

-Position ApplyStyleCommand::startPosition()

- if (m_useEndingSelection)

- return endingSelection().start();

- return m_start;

-Position ApplyStyleCommand::endPosition()

- if (m_useEndingSelection)

- return endingSelection().end();

- return m_end;

-void ApplyStyleCommand::doApply()

- switch (m_propertyLevel) {

- case PropertyDefault: {

- // Apply the block-centric properties of the style.

- RefPtrWillBeRawPtr<EditingStyle> blockStyle = m_style->extractAndRemoveBlockProperties();

- if (!blockStyle->isEmpty())

- applyBlockStyle(blockStyle.get());

- // Apply any remaining styles to the inline elements.

- if (!m_style->isEmpty() || m_styledInlineElement || m_isInlineElementToRemoveFunction) {

- applyRelativeFontStyleChange(m_style.get());

- applyInlineStyle(m_style.get());

- }

- break;

- }

- case ForceBlockProperties:

- // Force all properties to be applied as block styles.

- applyBlockStyle(m_style.get());

- break;

- }

-EditAction ApplyStyleCommand::editingAction() const

- return m_editingAction;

-void ApplyStyleCommand::applyBlockStyle(EditingStyle *style)

- // 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();

- // get positions we want to use for applying style

- Position start = startPosition();

- Position end = endPosition();

- if (comparePositions(end, start) < 0) {

- Position swap = start;

- start = end;

- end = swap;

- }

- VisiblePosition visibleStart(start);

- VisiblePosition visibleEnd(end);

- if (visibleStart.isNull() || visibleStart.isOrphan() || visibleEnd.isNull() || visibleEnd.isOrphan())

- return;

- // Save and restore the selection endpoints using their indices in the document, since

- // addBlockStyleIfNeeded may moveParagraphs, which can remove these endpoints.

- // Calculate start and end indices from the start of the tree that they're in.

- Node& scope = NodeTraversal::highestAncestorOrSelf(*visibleStart.deepEquivalent().anchorNode());

- RefPtrWillBeRawPtr<Range> startRange = Range::create(document(), firstPositionInNode(&scope), visibleStart.deepEquivalent().parentAnchoredEquivalent());

- RefPtrWillBeRawPtr<Range> endRange = Range::create(document(), firstPositionInNode(&scope), visibleEnd.deepEquivalent().parentAnchoredEquivalent());

- int startIndex = TextIterator::rangeLength(startRange->startPosition(), startRange->endPosition(), true);

- int endIndex = TextIterator::rangeLength(endRange->startPosition(), endRange->endPosition(), true);

- VisiblePosition paragraphStart(startOfParagraph(visibleStart));

- VisiblePosition nextParagraphStart(endOfParagraph(paragraphStart).next());

- VisiblePosition beyondEnd(endOfParagraph(visibleEnd).next());

- while (paragraphStart.isNotNull() && paragraphStart.deepEquivalent() != beyondEnd.deepEquivalent()) {

- StyleChange styleChange(style, paragraphStart.deepEquivalent());

- if (styleChange.cssStyle().length() || m_removeOnly) {

- RefPtrWillBeRawPtr<Element> block = enclosingBlock(paragraphStart.deepEquivalent().anchorNode());

- const Position& paragraphStartToMove = paragraphStart.deepEquivalent();

- if (!m_removeOnly && isEditablePosition(paragraphStartToMove)) {

- RefPtrWillBeRawPtr<HTMLElement> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStartToMove);

- if (newBlock)

- block = newBlock;

- }

- if (block && block->isHTMLElement()) {

- removeCSSStyle(style, toHTMLElement(block));

- if (!m_removeOnly)

- addBlockStyle(styleChange, toHTMLElement(block));

- }

- if (nextParagraphStart.isOrphan())

- nextParagraphStart = endOfParagraph(paragraphStart).next();

- }

- paragraphStart = nextParagraphStart;

- nextParagraphStart = endOfParagraph(paragraphStart).next();

- }

- EphemeralRange startEphemeralRange = PlainTextRange(startIndex).createRangeForSelection(toContainerNode(scope));

- if (startEphemeralRange.isNull())

- return;

- EphemeralRange endEphemeralRange = PlainTextRange(endIndex).createRangeForSelection(toContainerNode(scope));

- if (endEphemeralRange.isNull())

- return;

- updateStartEnd(startEphemeralRange.startPosition(), endEphemeralRange.startPosition());

-static PassRefPtrWillBeRawPtr<MutableStylePropertySet> copyStyleOrCreateEmpty(const StylePropertySet* style)

- if (!style)

- return MutableStylePropertySet::create();

- return style->mutableCopy();

-void ApplyStyleCommand::applyRelativeFontStyleChange(EditingStyle* style)

- static const float MinimumFontSize = 0.1f;

- if (!style || !style->hasFontSizeDelta())

- return;

- Position start = startPosition();

- Position end = endPosition();

- if (comparePositions(end, start) < 0) {

- Position swap = start;

- start = end;

- end = swap;

- }

- // Join up any adjacent text nodes.

- if (start.anchorNode()->isTextNode()) {

- joinChildTextNodes(start.anchorNode()->parentNode(), start, end);

- start = startPosition();

- end = endPosition();

- }

- if (start.isNull() || end.isNull())

- return;

- if (end.anchorNode()->isTextNode() && start.anchorNode()->parentNode() != end.anchorNode()->parentNode()) {

- joinChildTextNodes(end.anchorNode()->parentNode(), start, end);

- start = startPosition();

- end = endPosition();

- }

- if (start.isNull() || end.isNull())

- return;

- // Split the start text nodes if needed to apply style.

- if (isValidCaretPositionInTextNode(start)) {

- splitTextAtStart(start, end);

- start = startPosition();

- end = endPosition();

- }

- if (isValidCaretPositionInTextNode(end)) {

- splitTextAtEnd(start, end);

- start = startPosition();

- end = endPosition();

- }

- // Calculate loop end point.

- // If the end node is before the start node (can only happen if the end node is

- // an ancestor of the start node), we gather nodes up to the next sibling of the end node

- Node* beyondEnd;

- ASSERT(start.anchorNode());

- ASSERT(end.anchorNode());

- if (start.anchorNode()->isDescendantOf(end.anchorNode()))

- beyondEnd = NodeTraversal::nextSkippingChildren(*end.anchorNode());

- else

- beyondEnd = NodeTraversal::next(*end.anchorNode());

- start = start.upstream(); // Move upstream to ensure we do not add redundant spans.

- Node* startNode = start.anchorNode();

- ASSERT(startNode);

- // Make sure we're not already at the end or the next NodeTraversal::next() will traverse

- // past it.

- if (startNode == beyondEnd)

- return;

- if (startNode->isTextNode() && start.computeOffsetInContainerNode() >= caretMaxOffset(startNode)) {

- // Move out of text node if range does not include its characters.

- startNode = NodeTraversal::next(*startNode);

- if (!startNode)

- return;

- }

- // Store away font size before making any changes to the document.

- // This ensures that changes to one node won't effect another.

- WillBeHeapHashMap<RawPtrWillBeMember<Node>, float> startingFontSizes;

- for (Node* node = startNode; node != beyondEnd; node = NodeTraversal::next(*node)) {

- ASSERT(node);

- startingFontSizes.set(node, computedFontSize(node));

- }

- // These spans were added by us. If empty after font size changes, they can be removed.

- WillBeHeapVector<RefPtrWillBeMember<HTMLElement>> unstyledSpans;

- Node* lastStyledNode = nullptr;

- for (Node* node = startNode; node != beyondEnd; node = NodeTraversal::next(*node)) {

- ASSERT(node);

- RefPtrWillBeRawPtr<HTMLElement> element = nullptr;

- if (node->isHTMLElement()) {

- // Only work on fully selected nodes.

- if (!elementFullySelected(toHTMLElement(*node), start, end))

- continue;

- element = toHTMLElement(node);

- } else if (node->isTextNode() && node->layoutObject() && node->parentNode() != lastStyledNode) {

- // Last styled node was not parent node of this text node, but we wish to style this

- // text node. To make this possible, add a style span to surround this text node.

- RefPtrWillBeRawPtr<HTMLSpanElement> span = createStyleSpanElement(document());

- surroundNodeRangeWithElement(node, node, span.get());

- element = span.release();

- } else {

- // Only handle HTML elements and text nodes.

- continue;

- }

- lastStyledNode = node;

- RefPtrWillBeRawPtr<MutableStylePropertySet> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());

- float currentFontSize = computedFontSize(node);

- float desiredFontSize = max(MinimumFontSize, startingFontSizes.get(node) + style->fontSizeDelta());

- RefPtrWillBeRawPtr<CSSValue> value = inlineStyle->getPropertyCSSValue(CSSPropertyFontSize);

- if (value) {

- element->removeInlineStyleProperty(CSSPropertyFontSize);

- currentFontSize = computedFontSize(node);

- }

- if (currentFontSize != desiredFontSize) {

- inlineStyle->setProperty(CSSPropertyFontSize, cssValuePool().createValue(desiredFontSize, CSSPrimitiveValue::UnitType::Pixels), false);

- setNodeAttribute(element.get(), styleAttr, AtomicString(inlineStyle->asText()));

- }

- if (inlineStyle->isEmpty()) {

- removeElementAttribute(element.get(), styleAttr);

- if (isSpanWithoutAttributesOrUnstyledStyleSpan(element.get()))

- unstyledSpans.append(element.release());

- }

- for (const auto& unstyledSpan : unstyledSpans)

- removeNodePreservingChildren(unstyledSpan.get());

-static ContainerNode* dummySpanAncestorForNode(const Node* node)

- while (node && (!node->isElementNode() || !isStyleSpanOrSpanWithOnlyStyleAttribute(toElement(node))))

- node = node->parentNode();

- return node ? node->parentNode() : 0;

-void ApplyStyleCommand::cleanupUnstyledAppleStyleSpans(ContainerNode* dummySpanAncestor)

- if (!dummySpanAncestor)

- return;

- // Dummy spans are created when text node is split, so that style information

- // can be propagated, which can result in more splitting. If a dummy span gets

- // cloned/split, the new node is always a sibling of it. Therefore, we scan

- // all the children of the dummy's parent

- Node* next;

- for (Node* node = dummySpanAncestor->firstChild(); node; node = next) {

- next = node->nextSibling();

- if (isSpanWithoutAttributesOrUnstyledStyleSpan(node))

- removeNodePreservingChildren(node);

- }

-HTMLElement* ApplyStyleCommand::splitAncestorsWithUnicodeBidi(Node* node, bool before, WritingDirection allowedDirection)

- // We are allowed to leave the highest ancestor with unicode-bidi unsplit if it is unicode-bidi: embed and direction: allowedDirection.

- // In that case, we return the unsplit ancestor. Otherwise, we return 0.

- Element* block = enclosingBlock(node);

- if (!block)

- return 0;

- ContainerNode* highestAncestorWithUnicodeBidi = nullptr;

- ContainerNode* nextHighestAncestorWithUnicodeBidi = nullptr;

- int highestAncestorUnicodeBidi = 0;

- for (ContainerNode* n = node->parentNode(); n != block; n = n->parentNode()) {

- int unicodeBidi = getIdentifierValue(CSSComputedStyleDeclaration::create(n).get(), CSSPropertyUnicodeBidi);

- if (unicodeBidi && unicodeBidi != CSSValueNormal) {

- highestAncestorUnicodeBidi = unicodeBidi;

- nextHighestAncestorWithUnicodeBidi = highestAncestorWithUnicodeBidi;

- highestAncestorWithUnicodeBidi = n;

- }

- if (!highestAncestorWithUnicodeBidi)

- return 0;

- HTMLElement* unsplitAncestor = 0;

- WritingDirection highestAncestorDirection;

- if (allowedDirection != NaturalWritingDirection

- && highestAncestorUnicodeBidi != CSSValueBidiOverride

- && highestAncestorWithUnicodeBidi->isHTMLElement()

- && EditingStyle::create(highestAncestorWithUnicodeBidi, EditingStyle::AllProperties)->textDirection(highestAncestorDirection)

- && highestAncestorDirection == allowedDirection) {

- if (!nextHighestAncestorWithUnicodeBidi)

- return toHTMLElement(highestAncestorWithUnicodeBidi);

- unsplitAncestor = toHTMLElement(highestAncestorWithUnicodeBidi);

- highestAncestorWithUnicodeBidi = nextHighestAncestorWithUnicodeBidi;

- }

- // Split every ancestor through highest ancestor with embedding.

- RefPtrWillBeRawPtr<Node> currentNode = node;

- while (currentNode) {

- RefPtrWillBeRawPtr<Element> parent = toElement(currentNode->parentNode());

- if (before ? currentNode->previousSibling() : currentNode->nextSibling())

- splitElement(parent, before ? currentNode.get() : currentNode->nextSibling());

- if (parent == highestAncestorWithUnicodeBidi)

- break;

- currentNode = parent;

- }

- return unsplitAncestor;

-void ApplyStyleCommand::removeEmbeddingUpToEnclosingBlock(Node* node, HTMLElement* unsplitAncestor)

- Element* block = enclosingBlock(node);

- if (!block)

- return;

- for (ContainerNode* n = node->parentNode(); n != block && n != unsplitAncestor; n = n->parentNode()) {

- if (!n->isStyledElement())

- continue;

- Element* element = toElement(n);

- int unicodeBidi = getIdentifierValue(CSSComputedStyleDeclaration::create(element).get(), 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->hasAttribute(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.

- removeElementAttribute(element, dirAttr);

- } else {

- RefPtrWillBeRawPtr<MutableStylePropertySet> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());

- inlineStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueNormal);

- inlineStyle->removeProperty(CSSPropertyDirection);

- setNodeAttribute(element, styleAttr, AtomicString(inlineStyle->asText()));

- if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))

- removeNodePreservingChildren(element);

- }

-static HTMLElement* highestEmbeddingAncestor(Node* startNode, Node* enclosingNode)

- for (Node* n = startNode; n && n != enclosingNode; n = n->parentNode()) {

- if (n->isHTMLElement() && getIdentifierValue(CSSComputedStyleDeclaration::create(n).get(), CSSPropertyUnicodeBidi) == CSSValueEmbed)

- return toHTMLElement(n);

- }

- return 0;

-void ApplyStyleCommand::applyInlineStyle(EditingStyle* style)

- RefPtrWillBeRawPtr<ContainerNode> startDummySpanAncestor = nullptr;

- RefPtrWillBeRawPtr<ContainerNode> endDummySpanAncestor = nullptr;

- // 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

- Position start = startPosition();

- Position end = endPosition();

- if (start.isNull() || end.isNull())

- return;

- if (comparePositions(end, start) < 0) {

- Position swap = start;

- start = end;

- end = swap;

- }

- // split the start node and containing element if the selection starts inside of it

- bool splitStart = isValidCaretPositionInTextNode(start);

- if (splitStart) {

- if (shouldSplitTextElement(start.anchorNode()->parentElement(), style))

- splitTextElementAtStart(start, end);

- else

- splitTextAtStart(start, end);

- start = startPosition();

- end = endPosition();

- if (start.isNull() || end.isNull())

- return;

- startDummySpanAncestor = dummySpanAncestorForNode(start.anchorNode());

- }

- // split the end node and containing element if the selection ends inside of it

- bool splitEnd = isValidCaretPositionInTextNode(end);

- if (splitEnd) {

- if (shouldSplitTextElement(end.anchorNode()->parentElement(), style))

- splitTextElementAtEnd(start, end);

- else

- splitTextAtEnd(start, end);

- start = startPosition();

- end = endPosition();

- if (start.isNull() || end.isNull())

- return;

- endDummySpanAncestor = dummySpanAncestorForNode(end.anchorNode());

- }

- // 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();

- WritingDirection textDirection = NaturalWritingDirection;

- bool hasTextDirection = style->textDirection(textDirection);

- RefPtrWillBeRawPtr<EditingStyle> styleWithoutEmbedding = nullptr;

- RefPtrWillBeRawPtr<EditingStyle> embeddingStyle = nullptr;

- if (hasTextDirection) {

- // Leave alone an ancestor that provides the desired single level embedding, if there is one.

- HTMLElement* startUnsplitAncestor = splitAncestorsWithUnicodeBidi(start.anchorNode(), true, textDirection);

- HTMLElement* endUnsplitAncestor = splitAncestorsWithUnicodeBidi(end.anchorNode(), false, textDirection);

- removeEmbeddingUpToEnclosingBlock(start.anchorNode(), startUnsplitAncestor);

- removeEmbeddingUpToEnclosingBlock(end.anchorNode(), endUnsplitAncestor);

- // Avoid removing the dir attribute and the unicode-bidi and direction properties from the unsplit ancestors.

- Position embeddingRemoveStart = removeStart;

- if (startUnsplitAncestor && elementFullySelected(*startUnsplitAncestor, removeStart, end))

- embeddingRemoveStart = positionInParentAfterNode(*startUnsplitAncestor);

- Position embeddingRemoveEnd = end;

- if (endUnsplitAncestor && elementFullySelected(*endUnsplitAncestor, removeStart, end))

- embeddingRemoveEnd = positionInParentBeforeNode(*endUnsplitAncestor).downstream();

- if (embeddingRemoveEnd != removeStart || embeddingRemoveEnd != end) {

- styleWithoutEmbedding = style->copy();

- embeddingStyle = styleWithoutEmbedding->extractAndRemoveTextDirection();

- if (comparePositions(embeddingRemoveStart, embeddingRemoveEnd) <= 0)

- removeInlineStyle(embeddingStyle.get(), embeddingRemoveStart, embeddingRemoveEnd);

- }

- removeInlineStyle(styleWithoutEmbedding ? styleWithoutEmbedding.get() : 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();

- }

- // 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();

- RefPtrWillBeRawPtr<EditingStyle> styleToApply = style;

- if (hasTextDirection) {

- // Avoid applying the unicode-bidi and direction properties beneath ancestors that already have them.

- HTMLElement* embeddingStartElement = highestEmbeddingAncestor(start.anchorNode(), enclosingBlock(start.anchorNode()));

- HTMLElement* embeddingEndElement = highestEmbeddingAncestor(end.anchorNode(), enclosingBlock(end.anchorNode()));

- if (embeddingStartElement || embeddingEndElement) {

- Position embeddingApplyStart = embeddingStartElement ? positionInParentAfterNode(*embeddingStartElement) : start;

- Position embeddingApplyEnd = embeddingEndElement ? positionInParentBeforeNode(*embeddingEndElement) : end;

- ASSERT(embeddingApplyStart.isNotNull() && embeddingApplyEnd.isNotNull());

- if (!embeddingStyle) {

- styleWithoutEmbedding = style->copy();

- embeddingStyle = styleWithoutEmbedding->extractAndRemoveTextDirection();

- }

- fixRangeAndApplyInlineStyle(embeddingStyle.get(), embeddingApplyStart, embeddingApplyEnd);

- styleToApply = styleWithoutEmbedding;

- }

- fixRangeAndApplyInlineStyle(styleToApply.get(), 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)

- Node* startNode = start.anchorNode();

- ASSERT(startNode);

- if (start.computeEditingOffset() >= caretMaxOffset(start.anchorNode())) {

- startNode = NodeTraversal::next(*startNode);

- if (!startNode || comparePositions(end, firstPositionInOrBeforeNode(startNode)) < 0)

- return;

- }

- Node* pastEndNode = end.anchorNode();

- if (end.computeEditingOffset() >= caretMaxOffset(end.anchorNode()))

- pastEndNode = NodeTraversal::nextSkippingChildren(*end.anchorNode());

- // FIXME: Callers should perform this operation on a Range that includes the br

- // if they want style applied to the empty line.

- if (start == end && isHTMLBRElement(*start.anchorNode()))

- pastEndNode = NodeTraversal::next(*start.anchorNode());

- // Start from the highest fully selected ancestor so that we can modify the fully selected node.

- // e.g. When applying font-size: large on hello, we need to include the font element in our run

- // to generate hello instead of hello

- RefPtrWillBeRawPtr<Range> range = Range::create(startNode->document(), start, end);

- Element* editableRoot = startNode->rootEditableElement();

- if (startNode != editableRoot) {

- while (editableRoot && startNode->parentNode() != editableRoot && isNodeVisiblyContainedWithin(*startNode->parentNode(), *range))

- startNode = startNode->parentNode();

- }

- applyInlineStyleToNodeRange(style, startNode, pastEndNode);

-static bool containsNonEditableRegion(Node& node)

- if (!node.hasEditableStyle())

- return true;

- Node* sibling = NodeTraversal::nextSkippingChildren(node);

- for (Node* descendent = node.firstChild(); descendent && descendent != sibling; descendent = NodeTraversal::next(*descendent)) {

- if (!descendent->hasEditableStyle())

- return true;

- }

- return false;

-class InlineRunToApplyStyle {

- ALLOW_ONLY_INLINE_ALLOCATION();

-public:

- InlineRunToApplyStyle(Node* start, Node* end, Node* pastEndNode)

- : start(start)

- , end(end)

- , pastEndNode(pastEndNode)

- {

- ASSERT(start->parentNode() == end->parentNode());

- }

- bool startAndEndAreStillInDocument()

- {

- return start && end && start->inDocument() && end->inDocument();

- }

- DEFINE_INLINE_TRACE()

- {

- visitor->trace(start);

- visitor->trace(end);

- visitor->trace(pastEndNode);

- visitor->trace(positionForStyleComputation);

- visitor->trace(dummyElement);

- }

- RefPtrWillBeMember<Node> start;

- RefPtrWillBeMember<Node> end;

- RefPtrWillBeMember<Node> pastEndNode;

- Position positionForStyleComputation;

- RefPtrWillBeMember<HTMLSpanElement> dummyElement;

- StyleChange change;

-};

-} // namespace blink

-WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::InlineRunToApplyStyle);

-namespace blink {

-void ApplyStyleCommand::applyInlineStyleToNodeRange(EditingStyle* style, PassRefPtrWillBeRawPtr<Node> startNode, PassRefPtrWillBeRawPtr<Node> pastEndNode)

- if (m_removeOnly)

- return;

- document().updateLayoutIgnorePendingStylesheets();

- WillBeHeapVector<InlineRunToApplyStyle> runs;

- RefPtrWillBeRawPtr<Node> node = startNode;

- for (RefPtrWillBeRawPtr<Node> next; node && node != pastEndNode; node = next) {

- next = NodeTraversal::next(*node);

- if (!node->layoutObject() || !node->hasEditableStyle())

- continue;

- if (!node->layoutObjectIsRichlyEditable() && node->isHTMLElement()) {

- HTMLElement* element = toHTMLElement(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(element))

- break;

- // Add to this element's inline style and skip over its contents.

- next = NodeTraversal::nextSkippingChildren(*node);

- if (!style->style())

- continue;

- RefPtrWillBeRawPtr<MutableStylePropertySet> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());

- inlineStyle->mergeAndOverrideOnConflict(style->style());

- setNodeAttribute(element, styleAttr, AtomicString(inlineStyle->asText()));

- continue;

- }

- if (isBlock(node.get()))

- continue;

- if (node->hasChildren()) {

- if (node->contains(pastEndNode.get()) || containsNonEditableRegion(*node) || !node->parentNode()->hasEditableStyle())

- continue;

- if (editingIgnoresContent(node.get())) {

- next = NodeTraversal::nextSkippingChildren(*node);

- continue;

- }

- Node* runStart = node.get();

- Node* runEnd = node.get();

- Node* sibling = node->nextSibling();

- while (sibling && sibling != pastEndNode && !sibling->contains(pastEndNode.get())

- && (!isBlock(sibling) || isHTMLBRElement(*sibling))

- && !containsNonEditableRegion(*sibling)) {

- runEnd = sibling;

- sibling = runEnd->nextSibling();

- }

- ASSERT(runEnd);

- next = NodeTraversal::nextSkippingChildren(*runEnd);

- Node* pastEndNode = NodeTraversal::nextSkippingChildren(*runEnd);

- if (!shouldApplyInlineStyleToRun(style, runStart, pastEndNode))

- continue;

- runs.append(InlineRunToApplyStyle(runStart, runEnd, pastEndNode));

- }

- for (auto& run : runs) {

- removeConflictingInlineStyleFromRun(style, run.start, run.end, run.pastEndNode);

- if (run.startAndEndAreStillInDocument())

- run.positionForStyleComputation = positionToComputeInlineStyleChange(run.start, run.dummyElement);

- }

- document().updateLayoutIgnorePendingStylesheets();

- for (auto& run : runs) {

- if (run.positionForStyleComputation.isNotNull())

- run.change = StyleChange(style, run.positionForStyleComputation);

- }

- for (auto& run : runs) {

- if (run.dummyElement)

- removeNode(run.dummyElement);

- if (run.startAndEndAreStillInDocument())

- applyInlineStyleChange(run.start.release(), run.end.release(), 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(style && runStart);

- for (Node* node = runStart; node && node != pastEndNode; node = NodeTraversal::next(*node)) {

- if (node->hasChildren())

- 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), m_styledInlineElement->tagQName()))

- return true;

- }

- return false;

-void ApplyStyleCommand::removeConflictingInlineStyleFromRun(EditingStyle* style, RefPtrWillBeMember<Node>& runStart, RefPtrWillBeMember<Node>& runEnd, PassRefPtrWillBeRawPtr<Node> pastEndNode)

- ASSERT(runStart && runEnd);

- RefPtrWillBeRawPtr<Node> next = runStart;

- for (RefPtrWillBeRawPtr<Node> node = next; node && node->inDocument() && node != pastEndNode; node = next) {

- if (editingIgnoresContent(node.get())) {

- ASSERT(!node->contains(pastEndNode.get()));

- next = NodeTraversal::nextSkippingChildren(*node);

- } else {

- next = NodeTraversal::next(*node);

- }

- if (!node->isHTMLElement())

- continue;

- HTMLElement& element = toHTMLElement(*node);

- RefPtrWillBeRawPtr<Node> previousSibling = element.previousSibling();

- RefPtrWillBeRawPtr<Node> nextSibling = element.nextSibling();

- RefPtrWillBeRawPtr<ContainerNode> parent = element.parentNode();

- removeInlineStyleFromElement(style, &element, RemoveAlways);

- if (!element.inDocument()) {

- // FIXME: We might need to update the start and the end of current selection here but need a test.

- if (runStart == element)

- runStart = previousSibling ? previousSibling->nextSibling() : parent->firstChild();

- if (runEnd == element)

- runEnd = nextSibling ? nextSibling->previousSibling() : parent->lastChild();

- }

-bool ApplyStyleCommand::removeInlineStyleFromElement(EditingStyle* style, PassRefPtrWillBeRawPtr<HTMLElement> element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)

- ASSERT(element);

- if (!element->parentNode() || !element->parentNode()->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable))

- return false;

- if (isStyledInlineElementToRemove(element.get())) {

- if (mode == RemoveNone)

- return true;

- if (extractedStyle)

- extractedStyle->mergeInlineStyleOfElement(element.get(), EditingStyle::OverrideValues);

- removeNodePreservingChildren(element);

- return true;

- }

- bool removed = false;

- if (removeImplicitlyStyledElement(style, element.get(), mode, extractedStyle))

- removed = true;

- if (!element->inDocument())

- return removed;

- // If the node was converted to a span, the span may still contain relevant

- // styles which must be removed (e.g. )

- if (removeCSSStyle(style, element.get(), mode, extractedStyle))

- removed = true;

- return removed;

-void ApplyStyleCommand::replaceWithSpanOrRemoveIfWithoutAttributes(HTMLElement* elem)

- if (hasNoAttributeOrOnlyStyleAttribute(elem, StyleAttributeShouldBeEmpty))

- removeNodePreservingChildren(elem);

- else

- replaceElementWithSpanPreservingChildrenAndAttributes(elem);

-bool ApplyStyleCommand::removeImplicitlyStyledElement(EditingStyle* style, HTMLElement* element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)

- ASSERT(style);

- 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 (const auto& attribute : attributes)

- removeElementAttribute(element, attribute);

- if (isEmptyFontTag(element) || isSpanWithoutAttributesOrUnstyledStyleSpan(element))

- removeNodePreservingChildren(element);

- return true;

-bool ApplyStyleCommand::removeCSSStyle(EditingStyle* style, HTMLElement* element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)

- ASSERT(style);

- ASSERT(element);

- if (mode == RemoveNone)

- return style->conflictsWithInlineStyleOfElement(element);

- Vector<CSSPropertyID> properties;

- if (!style->conflictsWithInlineStyleOfElement(element, extractedStyle, properties))

- return false;

- // FIXME: We should use a mass-removal function here but we don't have an undoable one yet.

- for (const auto& property : properties)

- removeCSSProperty(element, property);

- if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))

- removeNodePreservingChildren(element);

- return true;

-HTMLElement* ApplyStyleCommand::highestAncestorWithConflictingInlineStyle(EditingStyle* style, Node* node)

- if (!node)

- return 0;

- HTMLElement* result = nullptr;

- Node* unsplittableElement = unsplittableElementForPosition(firstPositionInOrBeforeNode(node));

- for (Node *n = node; n; n = n->parentNode()) {

- if (n->isHTMLElement() && shouldRemoveInlineStyleFromElement(style, toHTMLElement(n)))

- result = toHTMLElement(n);

- // Should stop at the editable root (cannot cross editing boundary) and

- // also stop at the unsplittable element to be consistent with other UAs

- if (n == unsplittableElement)

- break;

- }

- return result;

-void ApplyStyleCommand::applyInlineStyleToPushDown(Node* node, EditingStyle* style)

- ASSERT(node);

- node->document().updateLayoutTreeIfNeeded();

- if (!style || style->isEmpty() || !node->layoutObject() || isHTMLIFrameElement(*node))

- return;

- RefPtrWillBeRawPtr<EditingStyle> newInlineStyle = style;

- if (node->isHTMLElement() && toHTMLElement(node)->inlineStyle()) {

- newInlineStyle = style->copy();

- newInlineStyle->mergeInlineStyleOfElement(toHTMLElement(node), EditingStyle::OverrideValues);

- }

- // Since addInlineStyleIfNeeded can't add styles to block-flow layout objects, add style attribute instead.

- // FIXME: applyInlineStyleToRange should be used here instead.

- if ((node->layoutObject()->isLayoutBlockFlow() || node->hasChildren()) && node->isHTMLElement()) {

- setNodeAttribute(toHTMLElement(node), styleAttr, AtomicString(newInlineStyle->style()->asText()));

- return;

- }

- if (node->layoutObject()->isText() && toLayoutText(node->layoutObject())->isAllCollapsibleWhitespace())

- 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)

- HTMLElement* highestAncestor = highestAncestorWithConflictingInlineStyle(style, targetNode);

- if (!highestAncestor)

- return;

- // The outer loop is traversing the tree vertically from highestAncestor to targetNode

- RefPtrWillBeRawPtr<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.

- WillBeHeapVector<RefPtrWillBeMember<Element>> elementsToPushDown;

- while (current && current != targetNode && current->contains(targetNode)) {

- NodeVector currentChildren;

- getChildNodes(toContainerNode(*current), currentChildren);

- RefPtrWillBeRawPtr<Element> styledElement = nullptr;

- if (current->isStyledElement() && isStyledInlineElementToRemove(toElement(current))) {

- styledElement = toElement(current);

- elementsToPushDown.append(styledElement);

- }

- RefPtrWillBeRawPtr<EditingStyle> styleToPushDown = EditingStyle::create();

- if (current->isHTMLElement())

- removeInlineStyleFromElement(style, toHTMLElement(current), RemoveIfNeeded, styleToPushDown.get());

- // 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 (const auto& currentChild : currentChildren) {

- Node* child = currentChild.get();

- if (!child->parentNode())

- continue;

- if (!child->contains(targetNode) && elementsToPushDown.size()) {

- for (const auto& element : elementsToPushDown) {

- RefPtrWillBeRawPtr<Element> wrapper = element->cloneElementWithoutChildren();

- wrapper->removeAttribute(styleAttr);

- // Delete id attribute from the second element because the same id cannot be used for more than one element

- element->removeAttribute(HTMLNames::idAttr);

- if (isHTMLAnchorElement(element))

- element->removeAttribute(HTMLNames::nameAttr);

- surroundNodeRangeWithElement(child, child, wrapper);

- }

- // Apply style to all nodes containing targetNode and their siblings but NOT to targetNode

- // But if we've removed styledElement then go ahead and always apply the style.

- if (child != targetNode || styledElement)

- applyInlineStyleToPushDown(child, styleToPushDown.get());

- // 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.inDocument());

- ASSERT(end.inDocument());

- ASSERT(Position::commonAncestorTreeScope(start, end));

- ASSERT(comparePositions(start, end) <= 0);

- // 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 hello<div>world</div>, we want Position("world", 0) instead.

- Node* pushDownStartContainer = pushDownStart.computeContainerNode();

- if (pushDownStartContainer && pushDownStartContainer->isTextNode()

- && pushDownStart.computeOffsetInContainerNode() == pushDownStartContainer->maxCharacterOffset())

- pushDownStart = nextVisuallyDistinctCandidate(pushDownStart);

- Position pushDownEnd = end.upstream();

- // 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.

- Node* pushDownEndContainer = pushDownEnd.computeContainerNode();

- if (pushDownEndContainer && pushDownEndContainer->isTextNode() && !pushDownEnd.computeOffsetInContainerNode())

- pushDownEnd = previousVisuallyDistinctCandidate(pushDownEnd);

- pushDownInlineStyleAroundNode(style, pushDownStart.anchorNode());

- pushDownInlineStyleAroundNode(style, pushDownEnd.anchorNode());

- // 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.anchorNode() or end.anchorNode(),

- // 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;

- // Current ending selection resetting algorithm assumes |start| and |end|

- // are in a same DOM tree even if they are not in document.

- if (!Position::commonAncestorTreeScope(start, end))

- return;

- RefPtrWillBeRawPtr<Node> node = start.anchorNode();

- while (node) {

- RefPtrWillBeRawPtr<Node> next = nullptr;

- if (editingIgnoresContent(node.get())) {

- ASSERT(node == end.anchorNode() || !node->contains(end.anchorNode()));

- next = NodeTraversal::nextSkippingChildren(*node);

- } else {

- next = NodeTraversal::next(*node);

- }

- if (node->isHTMLElement() && elementFullySelected(toHTMLElement(*node), start, end)) {

- RefPtrWillBeRawPtr<HTMLElement> elem = toHTMLElement(node);

- RefPtrWillBeRawPtr<Node> prev = NodeTraversal::previousPostOrder(*elem);

- RefPtrWillBeRawPtr<Node> next = NodeTraversal::next(*elem);

- RefPtrWillBeRawPtr<EditingStyle> styleToPushDown = nullptr;

- RefPtrWillBeRawPtr<Node> childNode = nullptr;

- if (isStyledInlineElementToRemove(elem.get())) {

- styleToPushDown = EditingStyle::create();

- childNode = elem->firstChild();

- }

- removeInlineStyleFromElement(style, elem.get(), RemoveIfNeeded, styleToPushDown.get());

- if (!elem->inDocument()) {

- if (s.anchorNode() == elem) {

- // 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.isBeforeAnchor() || s.isBeforeChildren() || s.offsetInContainerNode() <= 0);

- s = firstPositionInOrBeforeNode(next.get());

- }

- if (e.anchorNode() == elem) {

- // 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.isAfterAnchor() || !offsetIsBeforeLastNodeOffset(s.offsetInContainerNode(), s.computeContainerNode()));

- e = lastPositionInOrAfterNode(prev.get());

- }

- if (styleToPushDown) {

- for (; childNode; childNode = childNode->nextSibling())

- applyInlineStyleToPushDown(childNode.get(), styleToPushDown.get());

- }

- if (node == end.anchorNode())

- break;

- node = next;

- }

- updateStartEnd(s, e);

-bool ApplyStyleCommand::elementFullySelected(HTMLElement& 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 comparePositions(firstPositionInOrBeforeNode(&element), start) >= 0

- && comparePositions(lastPositionInOrAfterNode(&element).upstream(), end) <= 0;

-void ApplyStyleCommand::splitTextAtStart(const Position& start, const Position& end)

- ASSERT(start.computeContainerNode()->isTextNode());

- Position newEnd;

- if (end.isOffsetInAnchor() && start.computeContainerNode() == end.computeContainerNode())

- newEnd = Position(end.computeContainerNode(), end.offsetInContainerNode() - start.offsetInContainerNode());

- else

- newEnd = end;

- RefPtrWillBeRawPtr<Text> text = toText(start.computeContainerNode());

- splitTextNode(text, start.offsetInContainerNode());

- updateStartEnd(firstPositionInNode(text.get()), newEnd);

-void ApplyStyleCommand::splitTextAtEnd(const Position& start, const Position& end)

- ASSERT(end.computeContainerNode()->isTextNode());

- bool shouldUpdateStart = start.isOffsetInAnchor() && start.computeContainerNode() == end.computeContainerNode();

- Text* text = toText(end.anchorNode());

- splitTextNode(text, end.offsetInContainerNode());

- Node* prevNode = text->previousSibling();

- if (!prevNode || !prevNode->isTextNode())

- return;

- Position newStart = shouldUpdateStart ? Position(toText(prevNode), start.offsetInContainerNode()) : start;

- updateStartEnd(newStart, lastPositionInNode(prevNode));

-void ApplyStyleCommand::splitTextElementAtStart(const Position& start, const Position& end)

- ASSERT(start.computeContainerNode()->isTextNode());

- Position newEnd;

- if (start.computeContainerNode() == end.computeContainerNode())

- newEnd = Position(end.computeContainerNode(), end.offsetInContainerNode() - start.offsetInContainerNode());

- else

- newEnd = end;

- splitTextNodeContainingElement(toText(start.computeContainerNode()), start.offsetInContainerNode());

- updateStartEnd(positionBeforeNode(start.computeContainerNode()), newEnd);

-void ApplyStyleCommand::splitTextElementAtEnd(const Position& start, const Position& end)

- ASSERT(end.computeContainerNode()->isTextNode());

- bool shouldUpdateStart = start.computeContainerNode() == end.computeContainerNode();

- splitTextNodeContainingElement(toText(end.computeContainerNode()), end.offsetInContainerNode());

- Node* parentElement = end.computeContainerNode()->parentNode();

- if (!parentElement || !parentElement->previousSibling())

- return;

- Node* firstTextNode = parentElement->previousSibling()->lastChild();

- if (!firstTextNode || !firstTextNode->isTextNode())

- return;

- Position newStart = shouldUpdateStart ? Position(toText(firstTextNode), start.offsetInContainerNode()) : start;

- updateStartEnd(newStart, positionAfterNode(firstTextNode));

-bool ApplyStyleCommand::shouldSplitTextElement(Element* element, EditingStyle* style)

- if (!element || !element->isHTMLElement())

- return false;

- return shouldRemoveInlineStyleFromElement(style, toHTMLElement(element));

-bool ApplyStyleCommand::isValidCaretPositionInTextNode(const Position& position)

- ASSERT(position.isNotNull());

- Node* node = position.computeContainerNode();

- if (!position.isOffsetInAnchor() || !node->isTextNode())

- return false;

- int offsetInText = position.offsetInContainerNode();

- return offsetInText > caretMinOffset(node) && offsetInText < caretMaxOffset(node);

-bool ApplyStyleCommand::mergeStartWithPreviousIfIdentical(const Position& start, const Position& end)

- Node* startNode = start.computeContainerNode();

- int startOffset = start.computeOffsetInContainerNode();

- if (startOffset)

- return false;

- if (isAtomicNode(startNode)) {

- // 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();

- }

- if (!startNode->isElementNode())

- return false;

- Node* previousSibling = startNode->previousSibling();

- if (previousSibling && areIdenticalElements(startNode, previousSibling)) {

- Element* previousElement = toElement(previousSibling);

- Element* element = toElement(startNode);

- Node* startChild = element->firstChild();

- ASSERT(startChild);

- mergeIdenticalElements(previousElement, element);

- int startOffsetAdjustment = startChild->nodeIndex();

- int endOffsetAdjustment = startNode == end.anchorNode() ? startOffsetAdjustment : 0;

- updateStartEnd(Position(startNode, startOffsetAdjustment),

- Position(end.anchorNode(), end.computeEditingOffset() + endOffsetAdjustment));

- return true;

- }

- return false;

-bool ApplyStyleCommand::mergeEndWithNextIfIdentical(const Position& start, const Position& end)

- Node* endNode = end.computeContainerNode();

- if (isAtomicNode(endNode)) {

- int endOffset = end.computeOffsetInContainerNode();

- if (offsetIsBeforeLastNodeOffset(endOffset, endNode))

- return false;

- if (end.anchorNode()->nextSibling())

- return false;

- endNode = end.anchorNode()->parentNode();

- }

- if (!endNode->isElementNode() || isHTMLBRElement(*endNode))

- return false;

- Node* nextSibling = endNode->nextSibling();

- if (nextSibling && areIdenticalElements(endNode, nextSibling)) {

- Element* nextElement = toElement(nextSibling);

- Element* element = toElement(endNode);

- Node* nextChild = nextElement->firstChild();

- mergeIdenticalElements(element, nextElement);

- bool shouldUpdateStart = start.computeContainerNode() == endNode;

- int endOffset = nextChild ? nextChild->nodeIndex() : nextElement->childNodes()->length();

- updateStartEnd(shouldUpdateStart ? Position(nextElement, start.offsetInContainerNode()) : start,

- Position(nextElement, endOffset));

- return true;

- }

- return false;

-void ApplyStyleCommand::surroundNodeRangeWithElement(PassRefPtrWillBeRawPtr<Node> passedStartNode, PassRefPtrWillBeRawPtr<Node> endNode, PassRefPtrWillBeRawPtr<Element> elementToInsert)

- ASSERT(passedStartNode);

- ASSERT(endNode);

- ASSERT(elementToInsert);

- RefPtrWillBeRawPtr<Node> node = passedStartNode;

- RefPtrWillBeRawPtr<Element> element = elementToInsert;

- insertNodeBefore(element, node);

- while (node) {

- RefPtrWillBeRawPtr<Node> next = node->nextSibling();

- if (node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable)) {

- removeNode(node);

- appendNode(node, element);

- }

- if (node == endNode)

- break;

- node = next;

- }

- RefPtrWillBeRawPtr<Node> nextSibling = element->nextSibling();

- RefPtrWillBeRawPtr<Node> previousSibling = element->previousSibling();

- if (nextSibling && nextSibling->isElementNode() && nextSibling->hasEditableStyle()

- && areIdenticalElements(element.get(), toElement(nextSibling)))

- mergeIdenticalElements(element.get(), toElement(nextSibling));

- if (previousSibling && previousSibling->isElementNode() && previousSibling->hasEditableStyle()) {

- Node* mergedElement = previousSibling->nextSibling();

- if (mergedElement->isElementNode() && mergedElement->hasEditableStyle()

- && areIdenticalElements(toElement(previousSibling), toElement(mergedElement)))

- mergeIdenticalElements(toElement(previousSibling), toElement(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().

-void ApplyStyleCommand::addBlockStyle(const StyleChange& styleChange, HTMLElement* block)

- // Do not check for legacy styles here. Those styles, like and , only apply for

- // inline content.

- if (!block)

- return;

- String cssStyle = styleChange.cssStyle();

- StringBuilder cssText;

- cssText.append(cssStyle);

- if (const StylePropertySet* decl = block->inlineStyle()) {

- if (!cssStyle.isEmpty())

- cssText.append(' ');

- cssText.append(decl->asText());

- }

- setNodeAttribute(block, styleAttr, cssText.toAtomicString());

-void ApplyStyleCommand::addInlineStyleIfNeeded(EditingStyle* style, PassRefPtrWillBeRawPtr<Node> passedStart, PassRefPtrWillBeRawPtr<Node> passedEnd, EAddStyledElement addStyledElement)

- if (!passedStart || !passedEnd || !passedStart->inDocument() || !passedEnd->inDocument())

- return;

- RefPtrWillBeRawPtr<Node> start = passedStart;

- RefPtrWillBeMember<HTMLSpanElement> dummyElement = nullptr;

- StyleChange styleChange(style, positionToComputeInlineStyleChange(start, dummyElement));

- if (dummyElement)

- removeNode(dummyElement);

- applyInlineStyleChange(start, passedEnd, styleChange, addStyledElement);

-Position ApplyStyleCommand::positionToComputeInlineStyleChange(PassRefPtrWillBeRawPtr<Node> startNode, RefPtrWillBeMember<HTMLSpanElement>& dummyElement)

- // It's okay to obtain the style at the startNode because we've removed all relevant styles from the current run.

- if (!startNode->isElementNode()) {

- dummyElement = createStyleSpanElement(document());

- insertNodeAt(dummyElement, positionBeforeNode(startNode.get()));

- return positionBeforeNode(dummyElement.get());

- }

- return firstPositionInOrBeforeNode(startNode.get());

-void ApplyStyleCommand::applyInlineStyleChange(PassRefPtrWillBeRawPtr<Node> passedStart, PassRefPtrWillBeRawPtr<Node> passedEnd, StyleChange& styleChange, EAddStyledElement addStyledElement)

- RefPtrWillBeRawPtr<Node> startNode = passedStart;

- RefPtrWillBeRawPtr<Node> endNode = passedEnd;

- ASSERT(startNode->inDocument());

- ASSERT(endNode->inDocument());

- // Find appropriate font and span elements top-down.

- HTMLFontElement* fontContainer = nullptr;

- HTMLElement* styleContainer = nullptr;

- for (Node* container = startNode.get(); container && startNode == endNode; container = container->firstChild()) {

- if (isHTMLFontElement(*container))

- fontContainer = toHTMLFontElement(container);

- bool styleContainerIsNotSpan = !isHTMLSpanElement(styleContainer);

- if (container->isHTMLElement()) {

- HTMLElement* containerElement = toHTMLElement(container);

- if (isHTMLSpanElement(*containerElement) || (styleContainerIsNotSpan && containerElement->hasChildren()))

- styleContainer = toHTMLElement(container);

- }

- if (!container->hasChildren())

- break;

- startNode = container->firstChild();

- endNode = container->lastChild();

- }

- // 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, AtomicString(styleChange.fontColor()));

- if (styleChange.applyFontFace())

- setNodeAttribute(fontContainer, faceAttr, AtomicString(styleChange.fontFace()));

- if (styleChange.applyFontSize())

- setNodeAttribute(fontContainer, sizeAttr, AtomicString(styleChange.fontSize()));

- } else {

- RefPtrWillBeRawPtr<HTMLFontElement> fontElement = createFontElement(document());

- if (styleChange.applyFontColor())

- fontElement->setAttribute(colorAttr, AtomicString(styleChange.fontColor()));

- if (styleChange.applyFontFace())

- fontElement->setAttribute(faceAttr, AtomicString(styleChange.fontFace()));

- if (styleChange.applyFontSize())

- fontElement->setAttribute(sizeAttr, AtomicString(styleChange.fontSize()));

- surroundNodeRangeWithElement(startNode, endNode, fontElement.get());

- }

- if (styleChange.cssStyle().length()) {

- if (styleContainer) {

- if (const StylePropertySet* existingStyle = styleContainer->inlineStyle()) {

- String existingText = existingStyle->asText();

- StringBuilder cssText;

- cssText.append(existingText);

- if (!existingText.isEmpty())

- cssText.append(' ');

- cssText.append(styleChange.cssStyle());

- setNodeAttribute(styleContainer, styleAttr, cssText.toAtomicString());

- } else {

- setNodeAttribute(styleContainer, styleAttr, AtomicString(styleChange.cssStyle()));

- }

- } else {

- RefPtrWillBeRawPtr<HTMLSpanElement> styleElement = createStyleSpanElement(document());

- styleElement->setAttribute(styleAttr, AtomicString(styleChange.cssStyle()));

- surroundNodeRangeWithElement(startNode, endNode, styleElement.release());

- }

- 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());

-float ApplyStyleCommand::computedFontSize(Node* node)

- if (!node)

- return 0;

- RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> style = CSSComputedStyleDeclaration::create(node);

- if (!style)

- return 0;

- RefPtrWillBeRawPtr<CSSPrimitiveValue> value = static_pointer_cast<CSSPrimitiveValue>(style->getPropertyCSSValue(CSSPropertyFontSize));

- if (!value)

- return 0;

- ASSERT(value->typeWithCalcResolved() == CSSPrimitiveValue::UnitType::Pixels);

- return value->getFloatValue();

-void ApplyStyleCommand::joinChildTextNodes(ContainerNode* node, const Position& start, const Position& end)

- if (!node)

- return;

- Position newStart = start;

- Position newEnd = end;

- WillBeHeapVector<RefPtrWillBeMember<Text>> textNodes;

- for (Node* curr = node->firstChild(); curr; curr = curr->nextSibling()) {

- if (!curr->isTextNode())

- continue;

- textNodes.append(toText(curr));

- }

- for (const auto& textNode : textNodes) {

- Text* childText = textNode.get();

- Node* next = childText->nextSibling();

- if (!next || !next->isTextNode())

- continue;

- Text* nextText = toText(next);

- if (start.isOffsetInAnchor() && next == start.computeContainerNode())

- newStart = Position(childText, childText->length() + start.offsetInContainerNode());

- if (end.isOffsetInAnchor() && next == end.computeContainerNode())

- newEnd = Position(childText, 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);

-DEFINE_TRACE(ApplyStyleCommand)

- visitor->trace(m_style);

- visitor->trace(m_start);

- visitor->trace(m_end);

- visitor->trace(m_styledInlineElement);

- CompositeEditCommand::trace(visitor);

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