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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 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 "ApplyStyleCommand.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSParser.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "CSSValuePool.h"
#include "Document.h"
#include "EditingStyle.h"
#include "Editor.h"
#include "Frame.h"
#include "HTMLFontElement.h"
#include "HTMLInterchange.h"
#include "HTMLNames.h"
#include "NodeList.h"
#include "Range.h"
#include "RenderObject.h"
#include "RenderText.h"
#include "StylePropertySet.h"
#include "StyleResolver.h"
#include "Text.h"
#include "TextIterator.h"
#include "htmlediting.h"
#include "visible_units.h"
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
using namespace HTMLNames;
static String& styleSpanClassString()
{
DEFINE_STATIC_LOCAL(String, styleSpanClassString, ((AppleStyleSpanClass)));
return styleSpanClassString;
}
bool isLegacyAppleStyleSpan(const Node *node)
{
if (!node || !node->isHTMLElement())
return false;
const HTMLElement* elem = static_cast<const HTMLElement*>(node);
return elem->hasLocalName(spanAttr) && elem->getAttribute(classAttr) == styleSpanClassString();
}
enum ShouldStyleAttributeBeEmpty { AllowNonEmptyStyleAttribute, StyleAttributeShouldBeEmpty };
static bool hasNoAttributeOrOnlyStyleAttribute(const StyledElement* element, ShouldStyleAttributeBeEmpty shouldStyleAttributeBeEmpty)
{
if (!element->hasAttributes())
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 <= element->attributeCount());
return matchedAttributes == element->attributeCount();
}
bool isStyleSpanOrSpanWithOnlyStyleAttribute(const Element* element)
{
if (!element || !element->hasTagName(spanTag))
return false;
return hasNoAttributeOrOnlyStyleAttribute(toHTMLElement(element), AllowNonEmptyStyleAttribute);
}
static inline bool isSpanWithoutAttributesOrUnstyledStyleSpan(const Node* node)
{
if (!node || !node->isHTMLElement() || !node->hasTagName(spanTag))
return false;
return hasNoAttributeOrOnlyStyleAttribute(toHTMLElement(node), StyleAttributeShouldBeEmpty);
}
static bool isEmptyFontTag(const Node *node)
{
if (!node || !node->hasTagName(fontTag))
return false;
const Element *elem = static_cast<const Element *>(node);
if (!elem->hasAttributes())
return true;
return elem->attributeCount() == 1 && elem->getAttribute(classAttr) == styleSpanClassString();
}
static PassRefPtr<Element> createFontElement(Document* document)
{
RefPtr<Element> fontNode = createHTMLElement(document, fontTag);
return fontNode.release();
}
PassRefPtr<HTMLElement> createStyleSpanElement(Document* document)
{
RefPtr<HTMLElement> styleElement = createHTMLElement(document, spanTag);
return styleElement.release();
}
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(0)
, 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(0)
, m_removeOnly(false)
, m_isInlineElementToRemoveFunction(0)
{
}
ApplyStyleCommand::ApplyStyleCommand(PassRefPtr<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(0)
, 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.
RefPtr<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 = highestAncestor(visibleStart.deepEquivalent().deprecatedNode());
RefPtr<Range> startRange = Range::create(document(), firstPositionInNode(scope), visibleStart.deepEquivalent().parentAnchoredEquivalent());
RefPtr<Range> endRange = Range::create(document(), firstPositionInNode(scope), visibleEnd.deepEquivalent().parentAnchoredEquivalent());
int startIndex = TextIterator::rangeLength(startRange.get(), true);
int endIndex = TextIterator::rangeLength(endRange.get(), true);
VisiblePosition paragraphStart(startOfParagraph(visibleStart));
VisiblePosition nextParagraphStart(endOfParagraph(paragraphStart).next());
VisiblePosition beyondEnd(endOfParagraph(visibleEnd).next());
while (paragraphStart.isNotNull() && paragraphStart != beyondEnd) {
StyleChange styleChange(style, paragraphStart.deepEquivalent());
if (styleChange.cssStyle().length() || m_removeOnly) {
RefPtr<Node> block = enclosingBlock(paragraphStart.deepEquivalent().deprecatedNode());
if (!m_removeOnly) {
RefPtr<Node> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStart.deepEquivalent());
if (newBlock)
block = newBlock;
}
ASSERT(!block || block->isHTMLElement());
if (block && block->isHTMLElement()) {
removeCSSStyle(style, toHTMLElement(block.get()));
if (!m_removeOnly)
addBlockStyle(styleChange, toHTMLElement(block.get()));
}
if (nextParagraphStart.isOrphan())
nextParagraphStart = endOfParagraph(paragraphStart).next();
}
paragraphStart = nextParagraphStart;
nextParagraphStart = endOfParagraph(paragraphStart).next();
}
startRange = TextIterator::rangeFromLocationAndLength(static_cast<Element*>(scope), startIndex, 0, true);
endRange = TextIterator::rangeFromLocationAndLength(static_cast<Element*>(scope), endIndex, 0, true);
if (startRange && endRange)
updateStartEnd(startRange->startPosition(), endRange->startPosition());
}
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.deprecatedNode()->isTextNode()) {
joinChildTextNodes(start.deprecatedNode()->parentNode(), start, end);
start = startPosition();
end = endPosition();
}
if (start.isNull() || end.isNull())
return;
if (end.deprecatedNode()->isTextNode() && 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 (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;
if (start.deprecatedNode()->isDescendantOf(end.deprecatedNode()))
beyondEnd = end.deprecatedNode()->traverseNextSibling();
else
beyondEnd = end.deprecatedNode()->traverseNextNode();
start = start.upstream(); // Move upstream to ensure we do not add redundant spans.
Node* startNode = start.deprecatedNode();
if (startNode->isTextNode() && start.deprecatedEditingOffset() >= caretMaxOffset(startNode)) // Move out of text node if range does not include its characters.
startNode = startNode->traverseNextNode();
// 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 = node->traverseNextNode())
startingFontSizes.set(node, computedFontSize(node));
// These spans were added by us. If empty after font size changes, they can be removed.
Vector<RefPtr<HTMLElement> > unstyledSpans;
Node* lastStyledNode = 0;
for (Node* node = startNode; node != beyondEnd; node = node->traverseNextNode()) {
RefPtr<HTMLElement> element;
if (node->isHTMLElement()) {
// Only work on fully selected nodes.
if (!nodeFullySelected(node, start, end))
continue;
element = toHTMLElement(node);
} else if (node->isTextNode() && 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.
RefPtr<HTMLElement> span = createStyleSpanElement(document());
surroundNodeRangeWithElement(node, node, span.get());
element = span.release();
} else {
// Only handle HTML elements and text nodes.
continue;
}
lastStyledNode = node;
RefPtr<StylePropertySet> inlineStyleDecl = element->ensureInlineStyle()->copy();
float currentFontSize = computedFontSize(node);
float desiredFontSize = max(MinimumFontSize, startingFontSizes.get(node) + style->fontSizeDelta());
RefPtr<CSSValue> value = inlineStyleDecl->getPropertyCSSValue(CSSPropertyFontSize);
if (value) {
element->removeInlineStyleProperty(CSSPropertyFontSize);
currentFontSize = computedFontSize(node);
}
if (currentFontSize != desiredFontSize) {
inlineStyleDecl->setProperty(CSSPropertyFontSize, cssValuePool().createValue(desiredFontSize, CSSPrimitiveValue::CSS_PX), false);
setNodeAttribute(element.get(), styleAttr, inlineStyleDecl->asText());
}
if (inlineStyleDecl->isEmpty()) {
removeNodeAttribute(element.get(), styleAttr);
if (isSpanWithoutAttributesOrUnstyledStyleSpan(element.get()))
unstyledSpans.append(element.release());
}
}
size_t size = unstyledSpans.size();
for (size_t i = 0; i < size; ++i)
removeNodePreservingChildren(unstyledSpans[i].get());
}
static Node* dummySpanAncestorForNode(const Node* node)
{
while (node && (!node->isElementNode() || !isStyleSpanOrSpanWithOnlyStyleAttribute(toElement(node))))
node = node->parentNode();
return node ? node->parentNode() : 0;
}
void ApplyStyleCommand::cleanupUnstyledAppleStyleSpans(Node* 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);
node = next;
}
}
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.
Node* block = enclosingBlock(node);
if (!block)
return 0;
Node* highestAncestorWithUnicodeBidi = 0;
Node* nextHighestAncestorWithUnicodeBidi = 0;
int highestAncestorUnicodeBidi = 0;
for (Node* 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.
Node* n = node;
while (true) {
Element* parent = static_cast<Element*>(n->parentNode());
if (before ? n->previousSibling() : n->nextSibling())
splitElement(parent, before ? n : n->nextSibling());
if (parent == highestAncestorWithUnicodeBidi)
break;
n = n->parentNode();
}
return unsplitAncestor;
}
void ApplyStyleCommand::removeEmbeddingUpToEnclosingBlock(Node* node, Node* unsplitAncestor)
{
Node* block = enclosingBlock(node);
if (!block)
return;
Node* parent = 0;
for (Node* n = node->parentNode(); n != block && n != unsplitAncestor; n = parent) {
parent = n->parentNode();
if (!n->isStyledElement())
continue;
StyledElement* element = static_cast<StyledElement*>(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.
removeNodeAttribute(element, dirAttr);
} else {
RefPtr<StylePropertySet> inlineStyle = element->ensureInlineStyle()->copy();
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() && getIdentifierValue(CSSComputedStyleDeclaration::create(n).get(), CSSPropertyUnicodeBidi) == CSSValueEmbed)
return n;
}
return 0;
}
void ApplyStyleCommand::applyInlineStyle(EditingStyle* style)
{
Node* startDummySpanAncestor = 0;
Node* endDummySpanAncestor = 0;
// 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());
}
// 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());
}
// 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);
RefPtr<EditingStyle> styleWithoutEmbedding;
RefPtr<EditingStyle> embeddingStyle;
if (hasTextDirection) {
// Leave alone an ancestor that provides the desired single level embedding, if there is one.
HTMLElement* startUnsplitAncestor = splitAncestorsWithUnicodeBidi(start.deprecatedNode(), true, textDirection);
HTMLElement* 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.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();
RefPtr<EditingStyle> styleToApply = style;
if (hasTextDirection) {
// 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.get(), embeddingApplyStart, embeddingApplyEnd);
styleToApply = styleWithoutEmbedding;
}
}
fixRangeAndApplyInlineStyle(styleToApply.get(), start, end);
// Remove dummy style spans created by splitting text elements.
cleanupUnstyledAppleStyleSpans(startDummySpanAncestor);
if (endDummySpanAncestor != startDummySpanAncestor)
cleanupUnstyledAppleStyleSpans(endDummySpanAncestor);
}
void ApplyStyleCommand::fixRangeAndApplyInlineStyle(EditingStyle* style, const Position& start, const Position& end)
{
Node* startNode = start.deprecatedNode();
if (start.deprecatedEditingOffset() >= caretMaxOffset(start.deprecatedNode())) {
startNode = startNode->traverseNextNode();
if (!startNode || comparePositions(end, firstPositionInOrBeforeNode(startNode)) < 0)
return;
}
Node* pastEndNode = end.deprecatedNode();
if (end.deprecatedEditingOffset() >= caretMaxOffset(end.deprecatedNode()))
pastEndNode = end.deprecatedNode()->traverseNextSibling();
// 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 && start.deprecatedNode()->hasTagName(brTag))
pastEndNode = start.deprecatedNode()->traverseNextNode();
// 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>
RefPtr<Range> range = Range::create(startNode->document(), start, end);
Element* editableRoot = startNode->rootEditableElement();
if (startNode != editableRoot) {
while (editableRoot && startNode->parentNode() != editableRoot && isNodeVisiblyContainedWithin(startNode->parentNode(), range.get()))
startNode = startNode->parentNode();
}
applyInlineStyleToNodeRange(style, startNode, pastEndNode);
}
static bool containsNonEditableRegion(Node* node)
{
if (!node->rendererIsEditable())
return true;
Node* sibling = node->traverseNextSibling();
for (Node* descendent = node->firstChild(); descendent && descendent != sibling; descendent = descendent->traverseNextNode()) {
if (!descendent->rendererIsEditable())
return true;
}
return false;
}
void ApplyStyleCommand::applyInlineStyleToNodeRange(EditingStyle* style, PassRefPtr<Node> startNode, PassRefPtr<Node> pastEndNode)
{
if (m_removeOnly)
return;
RefPtr<Node> node = startNode;
for (RefPtr<Node> next; node && node != pastEndNode; node = next) {
next = node->traverseNextNode();
if (!node->renderer() || !node->rendererIsEditable())
continue;
if (!node->rendererIsRichlyEditable() && node->isHTMLElement()) {
// 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.get()))
break;
// Add to this element's inline style and skip over its contents.
HTMLElement* element = toHTMLElement(node.get());
RefPtr<StylePropertySet> inlineStyle = element->ensureInlineStyle()->copy();
inlineStyle->mergeAndOverrideOnConflict(style->style());
setNodeAttribute(element, styleAttr, inlineStyle->asText());
next = node->traverseNextSibling();
continue;
}
if (isBlock(node.get()))
continue;
if (node->childNodeCount()) {
if (node->contains(pastEndNode.get()) || containsNonEditableRegion(node.get()) || !node->parentNode()->rendererIsEditable())
continue;
if (editingIgnoresContent(node.get())) {
next = node->traverseNextSibling();
continue;
}
}
RefPtr<Node> runStart = node;
RefPtr<Node> runEnd = node;
Node* sibling = node->nextSibling();
while (sibling && sibling != pastEndNode && !sibling->contains(pastEndNode.get())
&& (!isBlock(sibling) || sibling->hasTagName(brTag))
&& !containsNonEditableRegion(sibling)) {
runEnd = sibling;
sibling = runEnd->nextSibling();
}
next = runEnd->traverseNextSibling();
if (!removeStyleFromRunBeforeApplyingStyle(style, runStart, runEnd))
continue;
addInlineStyleIfNeeded(style, runStart.get(), runEnd.get(), AddStyledElement);
}
}
bool ApplyStyleCommand::isStyledInlineElementToRemove(Element* element) const
{
return (m_styledInlineElement && element->hasTagName(m_styledInlineElement->tagQName()))
|| (m_isInlineElementToRemoveFunction && m_isInlineElementToRemoveFunction(element));
}
bool ApplyStyleCommand::removeStyleFromRunBeforeApplyingStyle(EditingStyle* style, RefPtr<Node>& runStart, RefPtr<Node>& runEnd)
{
ASSERT(runStart && runEnd && runStart->parentNode() == runEnd->parentNode());
RefPtr<Node> pastEndNode = runEnd->traverseNextSibling();
bool needToApplyStyle = false;
for (Node* node = runStart.get(); node && node != pastEndNode.get(); node = node->traverseNextNode()) {
if (node->childNodeCount())
continue;
// We don't consider m_isInlineElementToRemoveFunction here because we never apply style when m_isInlineElementToRemoveFunction is specified
if (!style->styleIsPresentInComputedStyleOfNode(node)
|| (m_styledInlineElement && !enclosingNodeWithTag(positionBeforeNode(node), m_styledInlineElement->tagQName()))) {
needToApplyStyle = true;
break;
}
}
if (!needToApplyStyle)
return false;
RefPtr<Node> next = runStart;
for (RefPtr<Node> node = next; node && node->inDocument() && node != pastEndNode; node = next) {
if (editingIgnoresContent(node.get())) {
ASSERT(!node->contains(pastEndNode.get()));
next = node->traverseNextSibling();
} else
next = node->traverseNextNode();
if (!node->isHTMLElement())
continue;
RefPtr<Node> previousSibling = node->previousSibling();
RefPtr<Node> nextSibling = node->nextSibling();
RefPtr<ContainerNode> parent = node->parentNode();
removeInlineStyleFromElement(style, toHTMLElement(node.get()), RemoveAlways);
if (!node->inDocument()) {
// 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();
}
}
return true;
}
bool ApplyStyleCommand::removeInlineStyleFromElement(EditingStyle* style, PassRefPtr<HTMLElement> element, InlineStyleRemovalMode mode, EditingStyle* extractedStyle)
{
ASSERT(element);
if (!element->parentNode() || !element->parentNode()->isContentEditable())
return false;
if (isStyledInlineElementToRemove(element.get())) {
if (mode == RemoveNone)
return true;
ASSERT(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. <b style='font-weight: bold'>)
if (removeCSSStyle(style, element.get(), mode, extractedStyle))
removed = true;
return removed;
}
void ApplyStyleCommand::replaceWithSpanOrRemoveIfWithoutAttributes(HTMLElement*& elem)
{
if (hasNoAttributeOrOnlyStyleAttribute(elem, StyleAttributeShouldBeEmpty))
removeNodePreservingChildren(elem);
else {
HTMLElement* newSpanElement = replaceElementWithSpanPreservingChildrenAndAttributes(elem);
ASSERT(newSpanElement && newSpanElement->inDocument());
elem = newSpanElement;
}
}
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 (size_t i = 0; i < attributes.size(); i++)
removeNodeAttribute(element, attributes[i]);
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 (size_t i = 0; i < properties.size(); i++)
removeCSSProperty(element, properties[i]);
// No need to serialize <foo style=""> if we just removed the last css property
if (element->inlineStyle()->isEmpty())
removeNodeAttribute(element, styleAttr);
if (isSpanWithoutAttributesOrUnstyledStyleSpan(element))
removeNodePreservingChildren(element);
return true;
}
HTMLElement* ApplyStyleCommand::highestAncestorWithConflictingInlineStyle(EditingStyle* style, Node* node)
{
if (!node)
return 0;
HTMLElement* result = 0;
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);
if (!style || style->isEmpty() || !node->renderer())
return;
RefPtr<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 render objects, add style attribute instead.
// FIXME: applyInlineStyleToRange should be used here instead.
if ((node->renderer()->isBlockFlow() || node->childNodeCount()) && node->isHTMLElement()) {
setNodeAttribute(toHTMLElement(node), styleAttr, newInlineStyle->style()->asText());
return;
}
if (node->renderer()->isText() && static_cast<RenderText*>(node->renderer())->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
Node* current = highestAncestor;
// Along the way, styled elements that contain targetNode are removed and accumulated into elementsToPushDown.
// Each child of the removed element, exclusing ancestors of targetNode, is then wrapped by clones of elements in elementsToPushDown.
Vector<RefPtr<Element> > elementsToPushDown;
while (current != targetNode) {
ASSERT(current);
ASSERT(current->contains(targetNode));
NodeVector currentChildren;
getChildNodes(current, currentChildren);
RefPtr<StyledElement> styledElement;
if (current->isStyledElement() && isStyledInlineElementToRemove(static_cast<Element*>(current))) {
styledElement = static_cast<StyledElement*>(current);
elementsToPushDown.append(styledElement);
}
RefPtr<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 (size_t i = 0; i < currentChildren.size(); ++i) {
Node* child = currentChildren[i].get();