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ApplyStyleCommand.cpp
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ApplyStyleCommand.cpp
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/*
* Copyright (C) 2005, 2006, 2008, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* 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 "ApplyStyleCommand.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSParser.h"
#include "CSSValuePool.h"
#include "Document.h"
#include "Editing.h"
#include "Editor.h"
#include "ElementIterator.h"
#include "Frame.h"
#include "HTMLFontElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLInterchange.h"
#include "HTMLNames.h"
#include "HTMLSpanElement.h"
#include "NodeList.h"
#include "NodeTraversal.h"
#include "RenderObject.h"
#include "RenderText.h"
#include "StyleProperties.h"
#include "StyleResolver.h"
#include "Text.h"
#include "TextIterator.h"
#include "TextNodeTraversal.h"
#include "VisibleUnits.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
using namespace HTMLNames;
static int toIdentifier(RefPtr<CSSValue>&& value)
{
return is<CSSPrimitiveValue>(value) ? downcast<CSSPrimitiveValue>(*value).valueID() : 0;
}
static String& styleSpanClassString()
{
static NeverDestroyed<String> styleSpanClassString(AppleStyleSpanClass);
return styleSpanClassString;
}
bool isLegacyAppleStyleSpan(const Node* node)
{
if (!is<HTMLSpanElement>(node))
return false;
return downcast<HTMLSpanElement>(*node).attributeWithoutSynchronization(classAttr) == styleSpanClassString();
}
static bool hasNoAttributeOrOnlyStyleAttribute(const StyledElement& element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)
{
if (!element.hasAttributes())
return true;
unsigned matchedAttributes = 0;
if (element.attributeWithoutSynchronization(classAttr) == styleSpanClassString())
matchedAttributes++;
if (element.hasAttribute(styleAttr) && (shouldStyleAttributeBeEmpty == AllowNonEmptyStyleAttribute
|| !element.inlineStyle() || element.inlineStyle()->isEmpty()))
matchedAttributes++;
ASSERT(matchedAttributes <= element.attributeCount());
return matchedAttributes == element.attributeCount();
}
bool isStyleSpanOrSpanWithOnlyStyleAttribute(const Element& element)
{
if (!is<HTMLSpanElement>(element))
return false;
return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLSpanElement>(element), AllowNonEmptyStyleAttribute);
}
static inline bool isSpanWithoutAttributesOrUnstyledStyleSpan(const Element& element)
{
if (!is<HTMLSpanElement>(element))
return false;
return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLSpanElement>(element), StyleAttributeShouldBeEmpty);
}
bool isEmptyFontTag(const Element* element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)
{
if (!is<HTMLFontElement>(element))
return false;
return hasNoAttributeOrOnlyStyleAttribute(downcast<HTMLFontElement>(*element), shouldStyleAttributeBeEmpty);
}
static Ref<HTMLElement> createFontElement(Document& document)
{
return createHTMLElement(document, fontTag);
}
Ref<HTMLElement> createStyleSpanElement(Document& document)
{
return createHTMLElement(document, spanTag);
}
ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, EditAction editingAction, EPropertyLevel propertyLevel)
: CompositeEditCommand(document, editingAction)
, m_style(style->copy())
, m_propertyLevel(propertyLevel)
, m_start(endingSelection().start().downstream())
, m_end(endingSelection().end().upstream())
, m_useEndingSelection(true)
, m_removeOnly(false)
{
}
ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, const Position& start, const Position& end, EditAction editingAction, EPropertyLevel propertyLevel)
: CompositeEditCommand(document, editingAction)
, m_style(style->copy())
, m_propertyLevel(propertyLevel)
, m_start(start)
, m_end(end)
, m_useEndingSelection(false)
, m_removeOnly(false)
{
}
ApplyStyleCommand::ApplyStyleCommand(Ref<Element>&& element, bool removeOnly, EditAction editingAction)
: CompositeEditCommand(element->document(), editingAction)
, m_style(EditingStyle::create())
, m_propertyLevel(PropertyDefault)
, m_start(endingSelection().start().downstream())
, m_end(endingSelection().end().upstream())
, m_useEndingSelection(true)
, m_styledInlineElement(WTFMove(element))
, m_removeOnly(removeOnly)
{
}
ApplyStyleCommand::ApplyStyleCommand(Document& document, const EditingStyle* style, IsInlineElementToRemoveFunction isInlineElementToRemoveFunction, EditAction editingAction)
: CompositeEditCommand(document, editingAction)
, m_style(style->copy())
, m_propertyLevel(PropertyDefault)
, m_start(endingSelection().start().downstream())
, m_end(endingSelection().end().upstream())
, m_useEndingSelection(true)
, 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;
bool wasBaseFirst = startingSelection().isBaseFirst() || !startingSelection().isDirectional();
setEndingSelection(VisibleSelection(wasBaseFirst ? newStart : newEnd, wasBaseFirst ? newEnd : newStart, 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.
auto blockStyle = m_style->extractAndRemoveBlockProperties();
if (!blockStyle->isEmpty())
applyBlockStyle(blockStyle);
// Apply any remaining styles to the inline elements.
if (!m_style->isEmpty() || m_styledInlineElement || m_isInlineElementToRemoveFunction) {
applyRelativeFontStyleChange(m_style.get());
applyInlineStyle(*m_style);
}
break;
}
case ForceBlockProperties:
// Force all properties to be applied as block styles.
applyBlockStyle(*m_style);
break;
}
}
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 editable root, since
// addBlockStyleIfNeeded may moveParagraphs, which can remove these endpoints.
// Calculate start and end indices from the start of the tree that they're in.
auto* scope = highestEditableRoot(visibleStart.deepEquivalent());
if (!scope)
return;
auto startRange = Range::create(document(), firstPositionInNode(scope), visibleStart.deepEquivalent().parentAnchoredEquivalent());
auto endRange = Range::create(document(), firstPositionInNode(scope), visibleEnd.deepEquivalent().parentAnchoredEquivalent());
int startIndex = TextIterator::rangeLength(startRange.ptr(), true);
int endIndex = TextIterator::rangeLength(endRange.ptr(), true);
VisiblePosition paragraphStart(startOfParagraph(visibleStart));
VisiblePosition nextParagraphStart(endOfParagraph(paragraphStart).next());
if (visibleEnd != visibleStart && isStartOfParagraph(visibleEnd))
visibleEnd = visibleEnd.previous(CannotCrossEditingBoundary);
VisiblePosition beyondEnd(endOfParagraph(visibleEnd).next());
while (paragraphStart.isNotNull() && paragraphStart != beyondEnd) {
StyleChange styleChange(&style, paragraphStart.deepEquivalent());
if (styleChange.cssStyle() || m_removeOnly) {
RefPtr<Node> block = enclosingBlock(paragraphStart.deepEquivalent().deprecatedNode());
if (!m_removeOnly) {
RefPtr<Node> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStart.deepEquivalent());
if (newBlock)
block = newBlock;
}
ASSERT(!block || is<HTMLElement>(*block));
if (is<HTMLElement>(block)) {
removeCSSStyle(style, downcast<HTMLElement>(*block));
if (!m_removeOnly)
addBlockStyle(styleChange, downcast<HTMLElement>(*block));
}
if (nextParagraphStart.isOrphan())
nextParagraphStart = endOfParagraph(paragraphStart).next();
}
paragraphStart = nextParagraphStart;
nextParagraphStart = endOfParagraph(paragraphStart).next();
}
{
auto startRange = TextIterator::rangeFromLocationAndLength(scope, startIndex, 0, true);
auto endRange = TextIterator::rangeFromLocationAndLength(scope, endIndex, 0, true);
if (startRange && endRange)
updateStartEnd(startRange->startPosition(), endRange->startPosition());
}
}
static Ref<MutableStyleProperties> copyStyleOrCreateEmpty(const StyleProperties* style)
{
if (!style)
return MutableStyleProperties::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 (is<Text>(*start.deprecatedNode())) {
joinChildTextNodes(start.deprecatedNode()->parentNode(), start, end);
start = startPosition();
end = endPosition();
}
if (start.isNull() || end.isNull())
return;
if (is<Text>(*end.deprecatedNode()) && start.deprecatedNode()->parentNode() != end.deprecatedNode()->parentNode()) {
joinChildTextNodes(end.deprecatedNode()->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 (start.isNull() || end.isNull())
return;
if (isValidCaretPositionInTextNode(end)) {
splitTextAtEnd(start, end);
start = startPosition();
end = endPosition();
}
if (start.isNull() || end.isNull())
return;
// 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.deprecatedNode());
ASSERT(end.deprecatedNode());
if (start.deprecatedNode()->isDescendantOf(*end.deprecatedNode()))
beyondEnd = NodeTraversal::nextSkippingChildren(*end.deprecatedNode());
else
beyondEnd = NodeTraversal::next(*end.deprecatedNode());
start = start.upstream(); // Move upstream to ensure we do not add redundant spans.
Node* startNode = start.deprecatedNode();
// Make sure we're not already at the end or the next NodeTraversal::next() will traverse past it.
if (startNode == beyondEnd)
return;
if (is<Text>(*startNode) && start.deprecatedEditingOffset() >= 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.
HashMap<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.
Vector<Ref<HTMLElement>> unstyledSpans;
Node* lastStyledNode = nullptr;
for (Node* node = startNode; node != beyondEnd; node = NodeTraversal::next(*node)) {
ASSERT(node);
RefPtr<HTMLElement> element;
if (is<HTMLElement>(*node)) {
// Only work on fully selected nodes.
if (!nodeFullySelected(downcast<HTMLElement>(*node), start, end))
continue;
element = &downcast<HTMLElement>(*node);
} else if (is<Text>(*node) && node->renderer() && 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.
auto span = createStyleSpanElement(document());
surroundNodeRangeWithElement(*node, *node, span.copyRef());
element = WTFMove(span);
} else {
// Only handle HTML elements and text nodes.
continue;
}
lastStyledNode = node;
RefPtr<MutableStyleProperties> inlineStyle = copyStyleOrCreateEmpty(element->inlineStyle());
float currentFontSize = computedFontSize(node);
float desiredFontSize = std::max(MinimumFontSize, startingFontSizes.get(node) + style->fontSizeDelta());
RefPtr<CSSValue> value = inlineStyle->getPropertyCSSValue(CSSPropertyFontSize);
if (value) {
element->removeInlineStyleProperty(CSSPropertyFontSize);
currentFontSize = computedFontSize(node);
}
if (currentFontSize != desiredFontSize) {
inlineStyle->setProperty(CSSPropertyFontSize, CSSValuePool::singleton().createValue(desiredFontSize, CSSUnitType::CSS_PX), false);
setNodeAttribute(*element, styleAttr, inlineStyle->asText());
}
if (inlineStyle->isEmpty()) {
removeNodeAttribute(*element, styleAttr);
if (isSpanWithoutAttributesOrUnstyledStyleSpan(*element))
unstyledSpans.append(element.releaseNonNull());
}
}
for (auto& unstyledSpan : unstyledSpans)
removeNodePreservingChildren(unstyledSpan);
}
static ContainerNode* dummySpanAncestorForNode(const Node* node)
{
while (node && (!is<Element>(*node) || !isStyleSpanOrSpanWithOnlyStyleAttribute(downcast<Element>(*node))))
node = node->parentNode();
return node ? node->parentNode() : nullptr;
}
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
Vector<Element*> toRemove;
for (auto& child : childrenOfType<Element>(*dummySpanAncestor)) {
if (isSpanWithoutAttributesOrUnstyledStyleSpan(child))
toRemove.append(&child);
}
for (auto& element : toRemove)
removeNodePreservingChildren(*element);
}
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 || block == node)
return 0;
Node* highestAncestorWithUnicodeBidi = nullptr;
Node* nextHighestAncestorWithUnicodeBidi = nullptr;
int highestAncestorUnicodeBidi = 0;
for (Node* n = node->parentNode(); n != block; n = n->parentNode()) {
int unicodeBidi = toIdentifier(ComputedStyleExtractor(n).propertyValue(CSSPropertyUnicodeBidi));
if (unicodeBidi && unicodeBidi != CSSValueNormal) {
highestAncestorUnicodeBidi = unicodeBidi;
nextHighestAncestorWithUnicodeBidi = highestAncestorWithUnicodeBidi;
highestAncestorWithUnicodeBidi = n;
}
}
if (!highestAncestorWithUnicodeBidi)
return 0;
HTMLElement* unsplitAncestor = nullptr;
if (allowedDirection != WritingDirection::Natural && highestAncestorUnicodeBidi != CSSValueBidiOverride && is<HTMLElement>(*highestAncestorWithUnicodeBidi)) {
auto highestAncestorDirection = EditingStyle::create(highestAncestorWithUnicodeBidi, EditingStyle::AllProperties)->textDirection();
if (highestAncestorDirection && *highestAncestorDirection == allowedDirection) {
if (!nextHighestAncestorWithUnicodeBidi)
return downcast<HTMLElement>(highestAncestorWithUnicodeBidi);
unsplitAncestor = downcast<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)
{
Element* block = enclosingBlock(node);
if (!block || block == node)
return;
Node* parent = nullptr;
for (Node* ancestor = node->parentNode(); 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 {
RefPtr<MutableStyleProperties> inlineStyle = copyStyleOrCreateEmpty(element.inlineStyle());
inlineStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueNormal);
inlineStyle->removeProperty(CSSPropertyDirection);
setNodeAttribute(element, styleAttr, inlineStyle->asText());
if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))
removeNodePreservingChildren(element);
}
}
}
static Node* highestEmbeddingAncestor(Node* startNode, Node* enclosingNode)
{
for (Node* n = startNode; n && n != enclosingNode; n = n->parentNode()) {
if (n->isHTMLElement() && toIdentifier(ComputedStyleExtractor(n).propertyValue(CSSPropertyUnicodeBidi)) == CSSValueEmbed)
return n;
}
return 0;
}
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
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.deprecatedNode()->parentElement(), style))
splitTextElementAtStart(start, end);
else
splitTextAtStart(start, end);
start = startPosition();
end = endPosition();
startDummySpanAncestor = dummySpanAncestorForNode(start.deprecatedNode());
}
if (start.isNull() || end.isNull())
return;
// 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.hasValue()) {
// 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);
removeEmbeddingUpToEnclosingBlock(end.deprecatedNode(), endUnsplitAncestor);
// 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);
Position embeddingRemoveEnd = end;
if (endUnsplitAncestor && nodeFullySelected(*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, 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.hasValue()) {
// Avoid applying the unicode-bidi and direction properties beneath ancestors that already have them.
Node* embeddingStartNode = highestEmbeddingAncestor(start.deprecatedNode(), enclosingBlock(start.deprecatedNode()));
Node* embeddingEndNode = highestEmbeddingAncestor(end.deprecatedNode(), enclosingBlock(end.deprecatedNode()));
if (embeddingStartNode || embeddingEndNode) {
Position embeddingApplyStart = embeddingStartNode ? positionInParentAfterNode(embeddingStartNode) : start;
Position embeddingApplyEnd = embeddingEndNode ? positionInParentBeforeNode(embeddingEndNode) : 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)
{
Node* startNode = start.deprecatedNode();
if (start.deprecatedEditingOffset() >= caretMaxOffset(*startNode)) {
startNode = NodeTraversal::next(*startNode);
if (!startNode || comparePositions(end, firstPositionInOrBeforeNode(startNode)) < 0)
return;
}
Node* pastEndNode = 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 = Range::create(startNode->document(), start, end);
auto* 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* descendant = 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 (MutableStyleProperties* otherStyle = 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;
}
}
Node* runStart = node.get();
Node* runEnd = node.get();
Node* sibling = node->nextSibling();
while (sibling && sibling != pastEndNode && !sibling->contains(pastEndNode) && (!isBlock(sibling) || sibling->hasTagName(brTag)) && !containsNonEditableRegion(*sibling)) {
runEnd = sibling;
sibling = runEnd->nextSibling();
}
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.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 (Node* node = 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), 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;
}
HTMLElement* ApplyStyleCommand::highestAncestorWithConflictingInlineStyle(EditingStyle& style, Node* node)
{
if (!node)
return nullptr;
HTMLElement* result = nullptr;
Node* unsplittableElement = unsplittableElementForPosition(firstPositionInOrBeforeNode(node));
for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
if (is<HTMLElement>(*ancestor) && shouldRemoveInlineStyleFromElement(style, downcast<HTMLElement>(*ancestor)))
result = downcast<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;
}