/*
* 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 "CSSMutableStyleDeclaration.h"
#include "CSSParser.h"
#include "CSSProperty.h"
#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "Document.h"
#include "Editor.h"
#include "Frame.h"
#include "HTMLElement.h"
#include "HTMLInterchange.h"
#include "HTMLNames.h"
#include "NodeList.h"
#include "Range.h"
#include "RenderObject.h"
#include "Text.h"
#include "TextIterator.h"
#include "htmlediting.h"
#include "visible_units.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
using namespace HTMLNames;
class StyleChange {
public:
explicit StyleChange(CSSStyleDeclaration*, const Position&);
String cssStyle() const { return m_cssStyle; }
bool applyBold() const { return m_applyBold; }
bool applyItalic() const { return m_applyItalic; }
bool applyUnderline() const { return m_applyUnderline; }
bool applyLineThrough() const { return m_applyLineThrough; }
bool applySubscript() const { return m_applySubscript; }
bool applySuperscript() const { return m_applySuperscript; }
bool applyFontColor() const { return m_applyFontColor.length() > 0; }
bool applyFontFace() const { return m_applyFontFace.length() > 0; }
bool applyFontSize() const { return m_applyFontSize.length() > 0; }
String fontColor() { return m_applyFontColor; }
String fontFace() { return m_applyFontFace; }
String fontSize() { return m_applyFontSize; }
private:
void init(PassRefPtr<CSSStyleDeclaration>, const Position&);
void reconcileTextDecorationProperties(CSSMutableStyleDeclaration*);
void extractTextStyles(CSSMutableStyleDeclaration*);
String m_cssStyle;
bool m_applyBold;
bool m_applyItalic;
bool m_applyUnderline;
bool m_applyLineThrough;
bool m_applySubscript;
bool m_applySuperscript;
String m_applyFontColor;
String m_applyFontFace;
String m_applyFontSize;
};
StyleChange::StyleChange(CSSStyleDeclaration* style, const Position& position)
: m_applyBold(false)
, m_applyItalic(false)
, m_applyUnderline(false)
, m_applyLineThrough(false)
, m_applySubscript(false)
, m_applySuperscript(false)
{
init(style, position);
}
void StyleChange::init(PassRefPtr<CSSStyleDeclaration> style, const Position& position)
{
Document* document = position.node() ? position.node()->document() : 0;
if (!document || !document->frame())
return;
RefPtr<CSSComputedStyleDeclaration> computedStyle = position.computedStyle();
RefPtr<CSSMutableStyleDeclaration> mutableStyle = getPropertiesNotInComputedStyle(style.get(), computedStyle.get());
reconcileTextDecorationProperties(mutableStyle.get());
if (!document->frame()->editor()->shouldStyleWithCSS())
extractTextStyles(mutableStyle.get());
// Changing the whitespace style in a tab span would collapse the tab into a space.
if (isTabSpanTextNode(position.node()) || isTabSpanNode((position.node())))
mutableStyle->removeProperty(CSSPropertyWhiteSpace);
// If unicode-bidi is present in mutableStyle and direction is not, then add direction to mutableStyle.
// FIXME: Shouldn't this be done in getPropertiesNotInComputedStyle?
if (mutableStyle->getPropertyCSSValue(CSSPropertyUnicodeBidi) && !style->getPropertyCSSValue(CSSPropertyDirection))
mutableStyle->setProperty(CSSPropertyDirection, style->getPropertyValue(CSSPropertyDirection));
// Save the result for later
m_cssStyle = mutableStyle->cssText().stripWhiteSpace();
}
void StyleChange::reconcileTextDecorationProperties(CSSMutableStyleDeclaration* style)
{
RefPtr<CSSValue> textDecorationsInEffect = style->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect);
RefPtr<CSSValue> textDecoration = style->getPropertyCSSValue(CSSPropertyTextDecoration);
// We shouldn't have both text-decoration and -webkit-text-decorations-in-effect because that wouldn't make sense.
ASSERT(!textDecorationsInEffect || !textDecoration);
if (textDecorationsInEffect) {
style->setProperty(CSSPropertyTextDecoration, textDecorationsInEffect->cssText());
style->removeProperty(CSSPropertyWebkitTextDecorationsInEffect);
textDecoration = textDecorationsInEffect;
}
// If text-decoration is set to "none", remove the property because we don't want to add redundant "text-decoration: none".
if (textDecoration && !textDecoration->isValueList())
style->removeProperty(CSSPropertyTextDecoration);
}
static int getIdentifierValue(CSSMutableStyleDeclaration* style, int propertyID)
{
if (!style)
return 0;
RefPtr<CSSValue> value = style->getPropertyCSSValue(propertyID);
if (!value || !value->isPrimitiveValue())
return 0;
return static_cast<CSSPrimitiveValue*>(value.get())->getIdent();
}
static void setTextDecorationProperty(CSSMutableStyleDeclaration* style, const CSSValueList* newTextDecoration, int propertyID)
{
if (newTextDecoration->length())
style->setProperty(propertyID, newTextDecoration->cssText(), style->getPropertyPriority(propertyID));
else {
// text-decoration: none is redundant since it does not remove any text decorations.
ASSERT(!style->getPropertyPriority(propertyID));
style->removeProperty(propertyID);
}
}
void StyleChange::extractTextStyles(CSSMutableStyleDeclaration* style)
{
ASSERT(style);
if (getIdentifierValue(style, CSSPropertyFontWeight) == CSSValueBold) {
style->removeProperty(CSSPropertyFontWeight);
m_applyBold = true;
}
int fontStyle = getIdentifierValue(style, CSSPropertyFontStyle);
if (fontStyle == CSSValueItalic || fontStyle == CSSValueOblique) {
style->removeProperty(CSSPropertyFontStyle);
m_applyItalic = true;
}
// Assuming reconcileTextDecorationProperties has been called, there should not be -webkit-text-decorations-in-effect
// Furthermore, text-decoration: none has been trimmed so that text-decoration property is always a CSSValueList.
RefPtr<CSSValue> textDecoration = style->getPropertyCSSValue(CSSPropertyTextDecoration);
if (textDecoration && textDecoration->isValueList()) {
DEFINE_STATIC_LOCAL(RefPtr<CSSPrimitiveValue>, underline, (CSSPrimitiveValue::createIdentifier(CSSValueUnderline)));
DEFINE_STATIC_LOCAL(RefPtr<CSSPrimitiveValue>, lineThrough, (CSSPrimitiveValue::createIdentifier(CSSValueLineThrough)));
RefPtr<CSSValueList> newTextDecoration = static_cast<CSSValueList*>(textDecoration.get())->copy();
if (newTextDecoration->removeAll(underline.get()))
m_applyUnderline = true;
if (newTextDecoration->removeAll(lineThrough.get()))
m_applyLineThrough = true;
// If trimTextDecorations, delete underline and line-through
setTextDecorationProperty(style, newTextDecoration.get(), CSSPropertyTextDecoration);
}
int verticalAlign = getIdentifierValue(style, CSSPropertyVerticalAlign);
switch (verticalAlign) {
case CSSValueSub:
style->removeProperty(CSSPropertyVerticalAlign);
m_applySubscript = true;
break;
case CSSValueSuper:
style->removeProperty(CSSPropertyVerticalAlign);
m_applySuperscript = true;
break;
}
if (RefPtr<CSSValue> colorValue = style->getPropertyCSSValue(CSSPropertyColor)) {
ASSERT(colorValue->isPrimitiveValue());
CSSPrimitiveValue* primitiveColor = static_cast<CSSPrimitiveValue*>(colorValue.get());
RGBA32 rgba;
if (primitiveColor->primitiveType() != CSSPrimitiveValue::CSS_RGBCOLOR) {
CSSParser::parseColor(rgba, colorValue->cssText());
// Need to take care of named color such as green and black
// This code should be removed after https://bugs.webkit.org/show_bug.cgi?id=28282 is fixed.
} else
rgba = primitiveColor->getRGBA32Value();
m_applyFontColor = Color(rgba).name();
style->removeProperty(CSSPropertyColor);
}
m_applyFontFace = style->getPropertyValue(CSSPropertyFontFamily);
style->removeProperty(CSSPropertyFontFamily);
if (RefPtr<CSSValue> fontSize = style->getPropertyCSSValue(CSSPropertyFontSize)) {
if (!fontSize->isPrimitiveValue())
style->removeProperty(CSSPropertyFontSize); // Can't make sense of the number. Put no font size.
else {
CSSPrimitiveValue* value = static_cast<CSSPrimitiveValue*>(fontSize.get());
// Only accept absolute scale
if (value->primitiveType() >= CSSPrimitiveValue::CSS_PX && value->primitiveType() <= CSSPrimitiveValue::CSS_PC) {
float number = value->getFloatValue(CSSPrimitiveValue::CSS_PX);
if (number <= 9)
m_applyFontSize = "1";
else if (number <= 10)
m_applyFontSize = "2";
else if (number <= 13)
m_applyFontSize = "3";
else if (number <= 16)
m_applyFontSize = "4";
else if (number <= 18)
m_applyFontSize = "5";
else if (number <= 24)
m_applyFontSize = "6";
else
m_applyFontSize = "7";
}
// Huge quirk in Microsoft Entourage is that they understand CSS font-size, but also write
// out legacy 1-7 values in font tags (I guess for mailers that are not CSS-savvy at all,
// like Eudora). Yes, they write out *both*. We need to write out both as well.
}
}
}
static String& styleSpanClassString()
{
DEFINE_STATIC_LOCAL(String, styleSpanClassString, ((AppleStyleSpanClass)));
return styleSpanClassString;
}
bool isStyleSpan(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();
}
static bool isUnstyledStyleSpan(const Node* node)
{
if (!node || !node->isHTMLElement() || !node->hasTagName(spanTag))
return false;
const HTMLElement* elem = static_cast<const HTMLElement*>(node);
CSSMutableStyleDeclaration* inlineStyleDecl = elem->inlineStyleDecl();
return (!inlineStyleDecl || inlineStyleDecl->isEmpty()) && elem->getAttribute(classAttr) == styleSpanClassString();
}
static bool isSpanWithoutAttributesOrUnstyleStyleSpan(const Node* node)
{
if (!node || !node->isHTMLElement() || !node->hasTagName(spanTag))
return false;
const HTMLElement* elem = static_cast<const HTMLElement*>(node);
NamedNodeMap* attributes = elem->attributes(true); // readonly
if (attributes->isEmpty())
return true;
return isUnstyledStyleSpan(node);
}
static bool isEmptyFontTag(const Node *node)
{
if (!node || !node->hasTagName(fontTag))
return false;
const Element *elem = static_cast<const Element *>(node);
NamedNodeMap *map = elem->attributes(true); // true for read-only
if (!map)
return true;
return map->isEmpty() || (map->length() == 1 && elem->getAttribute(classAttr) == styleSpanClassString());
}
static PassRefPtr<Element> createFontElement(Document* document)
{
RefPtr<Element> fontNode = createHTMLElement(document, fontTag);
fontNode->setAttribute(classAttr, styleSpanClassString());
return fontNode.release();
}
PassRefPtr<HTMLElement> createStyleSpanElement(Document* document)
{
RefPtr<HTMLElement> styleElement = createHTMLElement(document, spanTag);
styleElement->setAttribute(classAttr, styleSpanClassString());
return styleElement.release();
}
static void diffTextDecorations(CSSMutableStyleDeclaration* style, int propertID, CSSValue* refTextDecoration)
{
RefPtr<CSSValue> textDecoration = style->getPropertyCSSValue(propertID);
if (!textDecoration || !textDecoration->isValueList() || !refTextDecoration || !refTextDecoration->isValueList())
return;
RefPtr<CSSValueList> newTextDecoration = static_cast<CSSValueList*>(textDecoration.get())->copy();
CSSValueList* valuesInRefTextDecoration = static_cast<CSSValueList*>(refTextDecoration);
for (size_t i = 0; i < valuesInRefTextDecoration->length(); i++)
newTextDecoration->removeAll(valuesInRefTextDecoration->item(i));
setTextDecorationProperty(style, newTextDecoration.get(), propertID);
}
static bool fontWeightIsBold(CSSStyleDeclaration* style)
{
ASSERT(style);
RefPtr<CSSValue> fontWeight = style->getPropertyCSSValue(CSSPropertyFontWeight);
if (!fontWeight)
return false;
if (!fontWeight->isPrimitiveValue())
return false;
// Because b tag can only bold text, there are only two states in plain html: bold and not bold.
// Collapse all other values to either one of these two states for editing purposes.
switch (static_cast<CSSPrimitiveValue*>(fontWeight.get())->getIdent()) {
case CSSValue100:
case CSSValue200:
case CSSValue300:
case CSSValue400:
case CSSValue500:
case CSSValueNormal:
return false;
case CSSValueBold:
case CSSValue600:
case CSSValue700:
case CSSValue800:
case CSSValue900:
return true;
}
ASSERT_NOT_REACHED(); // For CSSValueBolder and CSSValueLighter
return false; // Make compiler happy
}
RefPtr<CSSMutableStyleDeclaration> getPropertiesNotInComputedStyle(CSSStyleDeclaration* style, CSSComputedStyleDeclaration* computedStyle)
{
ASSERT(style);
ASSERT(computedStyle);
RefPtr<CSSMutableStyleDeclaration> result = style->copy();
computedStyle->diff(result.get());
RefPtr<CSSValue> computedTextDecorationsInEffect = computedStyle->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect);
diffTextDecorations(result.get(), CSSPropertyTextDecoration, computedTextDecorationsInEffect.get());
diffTextDecorations(result.get(), CSSPropertyWebkitTextDecorationsInEffect, computedTextDecorationsInEffect.get());
if (fontWeightIsBold(result.get()) == fontWeightIsBold(computedStyle))
result->removeProperty(CSSPropertyFontWeight);
return result;
}
// Editing style properties must be preserved during editing operation.
// e.g. when a user inserts a new paragraph, all properties listed here must be copied to the new paragraph.
// FIXME: The current editingStyleProperties contains all inheritableProperties but we may not need to preserve all inheritable properties
static const int editingStyleProperties[] = {
// CSS inheritable properties
CSSPropertyBorderCollapse,
CSSPropertyColor,
CSSPropertyFontFamily,
CSSPropertyFontSize,
CSSPropertyFontStyle,
CSSPropertyFontVariant,
CSSPropertyFontWeight,
CSSPropertyLetterSpacing,
CSSPropertyLineHeight,
CSSPropertyOrphans,
CSSPropertyTextAlign,
CSSPropertyTextIndent,
CSSPropertyTextTransform,
CSSPropertyWhiteSpace,
CSSPropertyWidows,
CSSPropertyWordSpacing,
CSSPropertyWebkitBorderHorizontalSpacing,
CSSPropertyWebkitBorderVerticalSpacing,
CSSPropertyWebkitTextDecorationsInEffect,
CSSPropertyWebkitTextFillColor,
CSSPropertyWebkitTextSizeAdjust,
CSSPropertyWebkitTextStrokeColor,
CSSPropertyWebkitTextStrokeWidth,
};
size_t numEditingStyleProperties = sizeof(editingStyleProperties)/sizeof(editingStyleProperties[0]);
PassRefPtr<CSSMutableStyleDeclaration> editingStyleAtPosition(Position pos, ShouldIncludeTypingStyle shouldIncludeTypingStyle)
{
RefPtr<CSSComputedStyleDeclaration> computedStyleAtPosition = pos.computedStyle();
RefPtr<CSSMutableStyleDeclaration> style;
if (!computedStyleAtPosition)
style = CSSMutableStyleDeclaration::create();
else
style = computedStyleAtPosition->copyPropertiesInSet(editingStyleProperties, numEditingStyleProperties);
if (style && pos.node() && pos.node()->computedStyle()) {
RenderStyle* renderStyle = pos.node()->computedStyle();
// If a node's text fill color is invalid, then its children use
// their font-color as their text fill color (they don't
// inherit it). Likewise for stroke color.
ExceptionCode ec = 0;
if (!renderStyle->textFillColor().isValid())
style->removeProperty(CSSPropertyWebkitTextFillColor, ec);
if (!renderStyle->textStrokeColor().isValid())
style->removeProperty(CSSPropertyWebkitTextStrokeColor, ec);
ASSERT(ec == 0);
if (renderStyle->fontDescription().keywordSize())
style->setProperty(CSSPropertyFontSize, computedStyleAtPosition->getFontSizeCSSValuePreferringKeyword()->cssText());
}
if (shouldIncludeTypingStyle == IncludeTypingStyle) {
CSSMutableStyleDeclaration* typingStyle = pos.node()->document()->frame()->typingStyle();
if (typingStyle)
style->merge(typingStyle);
}
return style.release();
}
void prepareEditingStyleToApplyAt(CSSMutableStyleDeclaration* editingStyle, Position pos)
{
// ReplaceSelectionCommand::handleStyleSpans() requires that this function only removes the editing style.
// If this function was modified in the future to delete all redundant properties, then add a boolean value to indicate
// which one of editingStyleAtPosition or computedStyle is called.
RefPtr<CSSMutableStyleDeclaration> style = editingStyleAtPosition(pos);
style->diff(editingStyle);
// if alpha value is zero, we don't add the background color.
RefPtr<CSSValue> backgroundColor = editingStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
if (backgroundColor && backgroundColor->isPrimitiveValue()) {
CSSPrimitiveValue* primitiveValue = static_cast<CSSPrimitiveValue*>(backgroundColor.get());
Color color = Color(primitiveValue->getRGBA32Value());
ExceptionCode ec;
if (color.alpha() == 0)
editingStyle->removeProperty(CSSPropertyBackgroundColor, ec);
}
}
void removeStylesAddedByNode(CSSMutableStyleDeclaration* editingStyle, Node* node)
{
ASSERT(node);
ASSERT(node->parentNode());
RefPtr<CSSMutableStyleDeclaration> parentStyle = editingStyleAtPosition(Position(node->parentNode(), 0));
RefPtr<CSSMutableStyleDeclaration> style = editingStyleAtPosition(Position(node, 0));
parentStyle->diff(style.get());
style->diff(editingStyle);
}
ApplyStyleCommand::ApplyStyleCommand(Document* document, CSSStyleDeclaration* style, EditAction editingAction, EPropertyLevel propertyLevel)
: CompositeEditCommand(document)
, m_style(style->makeMutable())
, 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)
{
}
ApplyStyleCommand::ApplyStyleCommand(Document* document, CSSStyleDeclaration* style, const Position& start, const Position& end, EditAction editingAction, EPropertyLevel propertyLevel)
: CompositeEditCommand(document)
, m_style(style->makeMutable())
, m_editingAction(editingAction)
, m_propertyLevel(propertyLevel)
, m_start(start)
, m_end(end)
, m_useEndingSelection(false)
, m_styledInlineElement(0)
, m_removeOnly(false)
{
}
ApplyStyleCommand::ApplyStyleCommand(PassRefPtr<Element> element, bool removeOnly, EditAction editingAction)
: CompositeEditCommand(element->document())
, m_style(CSSMutableStyleDeclaration::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)
{
}
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));
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<CSSMutableStyleDeclaration> blockStyle = m_style->copyBlockProperties();
if (blockStyle->length())
applyBlockStyle(blockStyle.get());
// apply any remaining styles to the inline elements
// NOTE: hopefully, this string comparison is the same as checking for a non-null diff
if (blockStyle->length() < m_style->length() || m_styledInlineElement) {
RefPtr<CSSMutableStyleDeclaration> inlineStyle = m_style->copy();
applyRelativeFontStyleChange(inlineStyle.get());
blockStyle->diff(inlineStyle.get());
applyInlineStyle(inlineStyle.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(CSSMutableStyleDeclaration *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
updateLayout();
// 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);
// 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().node());
Position rangeStart(scope, 0);
RefPtr<Range> startRange = Range::create(document(), rangeStart, rangeCompliantEquivalent(visibleStart.deepEquivalent()));
RefPtr<Range> endRange = Range::create(document(), rangeStart, rangeCompliantEquivalent(visibleEnd.deepEquivalent()));
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().node());
RefPtr<Node> newBlock = moveParagraphContentsToNewBlockIfNecessary(paragraphStart.deepEquivalent());
if (newBlock)
block = newBlock;
ASSERT(block->isHTMLElement());
if (block->isHTMLElement()) {
removeCSSStyle(style, static_cast<HTMLElement*>(block.get()));
if (!m_removeOnly)
addBlockStyle(styleChange, static_cast<HTMLElement*>(block.get()));
}
}
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());
}
#define NoFontDelta (0.0f)
#define MinimumFontSize (0.1f)
void ApplyStyleCommand::applyRelativeFontStyleChange(CSSMutableStyleDeclaration *style)
{
RefPtr<CSSValue> value = style->getPropertyCSSValue(CSSPropertyFontSize);
if (value) {
// Explicit font size overrides any delta.
style->removeProperty(CSSPropertyWebkitFontSizeDelta);
return;
}
// Get the adjustment amount out of the style.
value = style->getPropertyCSSValue(CSSPropertyWebkitFontSizeDelta);
if (!value)
return;
float adjustment = NoFontDelta;
if (value->cssValueType() == CSSValue::CSS_PRIMITIVE_VALUE) {
CSSPrimitiveValue *primitiveValue = static_cast<CSSPrimitiveValue *>(value.get());
if (primitiveValue->primitiveType() == CSSPrimitiveValue::CSS_PX) {
// Only PX handled now. If we handle more types in the future, perhaps
// a switch statement here would be more appropriate.
adjustment = primitiveValue->getFloatValue();
}
}
style->removeProperty(CSSPropertyWebkitFontSizeDelta);
if (adjustment == NoFontDelta)
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.node()->isTextNode()) {
joinChildTextNodes(start.node()->parentNode(), start, end);
start = startPosition();
end = endPosition();
}
if (end.node()->isTextNode() && start.node()->parentNode() != end.node()->parentNode()) {
joinChildTextNodes(end.node()->parentNode(), start, end);
start = startPosition();
end = endPosition();
}
// Split the start text nodes if needed to apply style.
bool splitStart = splitTextAtStartIfNeeded(start, end);
if (splitStart) {
start = startPosition();
end = endPosition();
}
bool splitEnd = splitTextAtEndIfNeeded(start, end);
if (splitEnd) {
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.node()->isDescendantOf(end.node()))
beyondEnd = end.node()->traverseNextSibling();
else
beyondEnd = end.node()->traverseNextNode();
start = start.upstream(); // Move upstream to ensure we do not add redundant spans.
Node *startNode = start.node();
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 = static_cast<HTMLElement*>(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;
CSSMutableStyleDeclaration* inlineStyleDecl = element->getInlineStyleDecl();
float currentFontSize = computedFontSize(node);
float desiredFontSize = max(MinimumFontSize, startingFontSizes.get(node) + adjustment);
RefPtr<CSSValue> value = inlineStyleDecl->getPropertyCSSValue(CSSPropertyFontSize);
if (value) {
inlineStyleDecl->removeProperty(CSSPropertyFontSize, true);
currentFontSize = computedFontSize(node);
}
if (currentFontSize != desiredFontSize) {
inlineStyleDecl->setProperty(CSSPropertyFontSize, String::number(desiredFontSize) + "px", false, false);
setNodeAttribute(element.get(), styleAttr, inlineStyleDecl->cssText());
}
if (inlineStyleDecl->isEmpty()) {
removeNodeAttribute(element.get(), styleAttr);
// FIXME: should this be isSpanWithoutAttributesOrUnstyleStyleSpan? Need a test.
if (isUnstyledStyleSpan(element.get()))
unstyledSpans.append(element.release());
}
}
size_t size = unstyledSpans.size();
for (size_t i = 0; i < size; ++i)
removeNodePreservingChildren(unstyledSpans[i].get());
}
#undef NoFontDelta
#undef MinimumFontSize
static Node* dummySpanAncestorForNode(const Node* node)
{
while (node && !isStyleSpan(node))
node = node->parent();
return node ? node->parent() : 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 (isUnstyledStyleSpan(node))
removeNodePreservingChildren(node);
node = next;
}
}
HTMLElement* ApplyStyleCommand::splitAncestorsWithUnicodeBidi(Node* node, bool before, RefPtr<CSSPrimitiveValue> 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;
RefPtr<CSSPrimitiveValue> highestAncestorUnicodeBidi;
for (Node* n = node->parent(); n != block; n = n->parent()) {
RefPtr<CSSValue> unicodeBidi = computedStyle(n)->getPropertyCSSValue(CSSPropertyUnicodeBidi);
if (unicodeBidi) {
ASSERT(unicodeBidi->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent() != CSSValueNormal) {
highestAncestorUnicodeBidi = static_cast<CSSPrimitiveValue*>(unicodeBidi.get());
nextHighestAncestorWithUnicodeBidi = highestAncestorWithUnicodeBidi;
highestAncestorWithUnicodeBidi = n;
}
}
}
if (!highestAncestorWithUnicodeBidi)
return 0;
HTMLElement* unsplitAncestor = 0;
if (allowedDirection && highestAncestorUnicodeBidi->getIdent() != CSSValueBidiOverride) {
RefPtr<CSSValue> highestAncestorDirection = computedStyle(highestAncestorWithUnicodeBidi)->getPropertyCSSValue(CSSPropertyDirection);
ASSERT(highestAncestorDirection->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(highestAncestorDirection.get())->getIdent() == allowedDirection->getIdent() && highestAncestorWithUnicodeBidi->isHTMLElement()) {
if (!nextHighestAncestorWithUnicodeBidi)
return static_cast<HTMLElement*>(highestAncestorWithUnicodeBidi);
unsplitAncestor = static_cast<HTMLElement*>(highestAncestorWithUnicodeBidi);
highestAncestorWithUnicodeBidi = nextHighestAncestorWithUnicodeBidi;
}
}
// Split every ancestor through highest ancestor with embedding.
Node* n = node;
while (true) {
Element* parent = static_cast<Element*>(n->parent());
if (before ? n->previousSibling() : n->nextSibling())
splitElement(parent, before ? n : n->nextSibling());
if (parent == highestAncestorWithUnicodeBidi)
break;
n = n->parent();
}
return unsplitAncestor;
}
void ApplyStyleCommand::removeEmbeddingUpToEnclosingBlock(Node* node, Node* unsplitAncestor)
{
Node* block = enclosingBlock(node);
if (!block)
return;
Node* n = node->parent();
while (n != block && n != unsplitAncestor) {
Node* parent = n->parent();
if (!n->isStyledElement()) {
n = parent;
continue;
}
StyledElement* element = static_cast<StyledElement*>(n);
RefPtr<CSSValue> unicodeBidi = computedStyle(element)->getPropertyCSSValue(CSSPropertyUnicodeBidi);
if (unicodeBidi) {
ASSERT(unicodeBidi->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent() != CSSValueNormal) {
// 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<CSSMutableStyleDeclaration> inlineStyle = element->getInlineStyleDecl()->copy();
inlineStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueNormal);
inlineStyle->removeProperty(CSSPropertyDirection);
setNodeAttribute(element, styleAttr, inlineStyle->cssText());
// FIXME: should this be isSpanWithoutAttributesOrUnstyleStyleSpan? Need a test.
if (isUnstyledStyleSpan(element))
removeNodePreservingChildren(element);
}
}
}
n = parent;
}
}
void ApplyStyleCommand::applyInlineStyle(CSSMutableStyleDeclaration *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
updateLayout();
// adjust to the 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;
}
// split the start node and containing element if the selection starts inside of it
bool splitStart = splitTextElementAtStartIfNeeded(start, end);
if (splitStart) {
start = startPosition();
end = endPosition();
startDummySpanAncestor = dummySpanAncestorForNode(start.node());
}
// split the end node and containing element if the selection ends inside of it
bool splitEnd = splitTextElementAtEndIfNeeded(start, end);
if (splitEnd) {
start = startPosition();
end = endPosition();
endDummySpanAncestor = dummySpanAncestorForNode(end.node());
}
RefPtr<CSSValue> unicodeBidi = style->getPropertyCSSValue(CSSPropertyUnicodeBidi);
RefPtr<CSSValue> direction;
HTMLElement* startUnsplitAncestor = 0;
HTMLElement* endUnsplitAncestor = 0;
if (unicodeBidi) {
RefPtr<CSSPrimitiveValue> allowedDirection;
ASSERT(unicodeBidi->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(unicodeBidi.get())->getIdent() == CSSValueEmbed) {
// Leave alone an ancestor that provides the desired single level embedding, if there is one.
direction = style->getPropertyCSSValue(CSSPropertyDirection);
ASSERT(direction->isPrimitiveValue());
allowedDirection = static_cast<CSSPrimitiveValue*>(direction.get());
}
startUnsplitAncestor = splitAncestorsWithUnicodeBidi(start.node(), true, allowedDirection);
endUnsplitAncestor = splitAncestorsWithUnicodeBidi(end.node(), false, allowedDirection);
removeEmbeddingUpToEnclosingBlock(start.node(), startUnsplitAncestor);
removeEmbeddingUpToEnclosingBlock(end.node(), endUnsplitAncestor);
}
// 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();
Position embeddingRemoveStart = removeStart;
Position embeddingRemoveEnd = end;
if (unicodeBidi) {
// Avoid removing the dir attribute and the unicode-bidi and direction properties from the unsplit ancestors.
if (startUnsplitAncestor && nodeFullySelected(startUnsplitAncestor, removeStart, end))
embeddingRemoveStart = positionInParentAfterNode(startUnsplitAncestor);
if (endUnsplitAncestor && nodeFullySelected(endUnsplitAncestor, removeStart, end))
embeddingRemoveEnd = positionInParentBeforeNode(endUnsplitAncestor).downstream();
}
if (embeddingRemoveStart != removeStart || embeddingRemoveEnd != end) {
RefPtr<CSSMutableStyleDeclaration> embeddingStyle = CSSMutableStyleDeclaration::create();
embeddingStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueEmbed);
embeddingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
if (comparePositions(embeddingRemoveStart, embeddingRemoveEnd) <= 0)
removeInlineStyle(embeddingStyle, embeddingRemoveStart, embeddingRemoveEnd);
RefPtr<CSSMutableStyleDeclaration> styleWithoutEmbedding = style->copy();
styleWithoutEmbedding->removeProperty(CSSPropertyUnicodeBidi);
styleWithoutEmbedding->removeProperty(CSSPropertyDirection);
removeInlineStyle(styleWithoutEmbedding, removeStart, end);
} else
removeInlineStyle(style, removeStart, end);
start = startPosition();
end = endPosition();
if (splitStart) {
bool mergedStart = mergeStartWithPreviousIfIdentical(start, end);
if (mergedStart) {
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
updateLayout();
Position embeddingApplyStart = start;
Position embeddingApplyEnd = end;
if (unicodeBidi) {
// Avoid applying the unicode-bidi and direction properties beneath ancestors that already have them.
Node* startEnclosingBlock = enclosingBlock(start.node());
for (Node* n = start.node(); n != startEnclosingBlock; n = n->parent()) {
if (n->isHTMLElement()) {
RefPtr<CSSValue> ancestorUnicodeBidi = computedStyle(n)->getPropertyCSSValue(CSSPropertyUnicodeBidi);
if (ancestorUnicodeBidi) {
ASSERT(ancestorUnicodeBidi->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(ancestorUnicodeBidi.get())->getIdent() == CSSValueEmbed) {
embeddingApplyStart = positionInParentAfterNode(n);
break;
}
}
}
}
Node* endEnclosingBlock = enclosingBlock(end.node());
for (Node* n = end.node(); n != endEnclosingBlock; n = n->parent()) {
if (n->isHTMLElement()) {
RefPtr<CSSValue> ancestorUnicodeBidi = computedStyle(n)->getPropertyCSSValue(CSSPropertyUnicodeBidi);
if (ancestorUnicodeBidi) {
ASSERT(ancestorUnicodeBidi->isPrimitiveValue());
if (static_cast<CSSPrimitiveValue*>(ancestorUnicodeBidi.get())->getIdent() == CSSValueEmbed) {
embeddingApplyEnd = positionInParentBeforeNode(n);
break;
}
}
}
}
}
if (embeddingApplyStart != start || embeddingApplyEnd != end) {
if (embeddingApplyStart.isNotNull() && embeddingApplyEnd.isNotNull()) {
RefPtr<CSSMutableStyleDeclaration> embeddingStyle = CSSMutableStyleDeclaration::create();
embeddingStyle->setProperty(CSSPropertyUnicodeBidi, CSSValueEmbed);
embeddingStyle->setProperty(CSSPropertyDirection, static_cast<CSSPrimitiveValue*>(direction.get())->getIdent());
applyInlineStyleToRange(embeddingStyle.get(), embeddingApplyStart, embeddingApplyEnd);
}
RefPtr<CSSMutableStyleDeclaration> styleWithoutEmbedding = style->copy();
styleWithoutEmbedding->removeProperty(CSSPropertyUnicodeBidi);
styleWithoutEmbedding->removeProperty(CSSPropertyDirection);
applyInlineStyleToRange(styleWithoutEmbedding.get(), start, end);
} else
applyInlineStyleToRange(style, start, end);
// Remove dummy style spans created by splitting text elements.
cleanupUnstyledAppleStyleSpans(startDummySpanAncestor);
if (endDummySpanAncestor != startDummySpanAncestor)
cleanupUnstyledAppleStyleSpans(endDummySpanAncestor);
}
void ApplyStyleCommand::applyInlineStyleToRange(CSSMutableStyleDeclaration* style, const Position& start, const Position& rangeEnd)
{
Node* node = start.node();
Position end = rangeEnd;
bool rangeIsEmpty = false;
if (start.deprecatedEditingOffset() >= caretMaxOffset(start.node())) {
node = node->traverseNextNode();
Position newStart = Position(node, 0);
if (!node || comparePositions(end, newStart) < 0)
rangeIsEmpty = true;
}
if (!rangeIsEmpty) {
// pastEndNode is the node after the last fully selected node.
Node* pastEndNode = end.node();
if (end.deprecatedEditingOffset() >= caretMaxOffset(end.node()))
pastEndNode = end.node()->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.node()->hasTagName(brTag))
pastEndNode = start.node()->traverseNextNode();
// Add the style to selected inline runs.
for (Node* next; node && node != pastEndNode; node = next) {
next = node->traverseNextNode();
if (!node->renderer() || !node->isContentEditable())
continue;
if (!node->isContentRichlyEditable() && 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))
break;
// Add to this element's inline style and skip over its contents.
HTMLElement* element = static_cast<HTMLElement*>(node);
RefPtr<CSSMutableStyleDeclaration> inlineStyle = element->getInlineStyleDecl()->copy();
inlineStyle->merge(style);
setNodeAttribute(element, styleAttr, inlineStyle->cssText());
next = node->traverseNextSibling();
continue;
}
if (isBlock(node))
continue;
if (node->childNodeCount()) {
if (editingIgnoresContent(node)) {
next = node->traverseNextSibling();
continue;
}
continue;
}
Node* runStart = node;
// Find the end of the run.
Node* sibling = node->nextSibling();
while (sibling && sibling != pastEndNode && (!sibling->isElementNode() || sibling->hasTagName(brTag)) && !isBlock(sibling)) {
node = sibling;
sibling = node->nextSibling();
}
// Recompute next, since node has changed.
next = node->traverseNextNode();
// Apply the style to the run.
addInlineStyleIfNeeded(style, runStart, node);
}
}
}
bool ApplyStyleCommand::shouldRemoveTextDecorationTag(CSSStyleDeclaration* styleToApply, int textDecorationAddedByTag) const
{
// Honor text-decorations-in-effect
RefPtr<CSSValue> textDecorationsToApply = styleToApply->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect);
if (!textDecorationsToApply || !textDecorationsToApply->isValueList())
textDecorationsToApply = styleToApply->getPropertyCSSValue(CSSPropertyTextDecoration);
// When there is no text decorations to apply, remove any one of u, s, & strike
if (!textDecorationsToApply || !textDecorationsToApply->isValueList())
return true;
// Remove node if it implicitly adds style not present in styleToApply
CSSValueList* valueList = static_cast<CSSValueList*>(textDecorationsToApply.get());
RefPtr<CSSPrimitiveValue> value = CSSPrimitiveValue::createIdentifier(textDecorationAddedByTag);
return !valueList->hasValue(value.get());
}
// This function maps from styling tags to CSS styles. Used for knowing which
// styling tags should be removed when toggling styles.
bool ApplyStyleCommand::implicitlyStyledElementShouldBeRemovedWhenApplyingStyle(HTMLElement* elem, CSSMutableStyleDeclaration* style)
{
CSSMutableStyleDeclaration::const_iterator end = style->end();
for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {
const CSSProperty& property = *it;
// FIXME: This should probably be re-written to lookup the tagname in a
// hash and match against an expected property/value pair.
switch (property.id()) {
case CSSPropertyFontWeight:
// IE inserts "strong" tags for execCommand("bold"), so we remove them, even though they're not strictly presentational
if (elem->hasLocalName(bTag) || elem->hasLocalName(strongTag))
return !equalIgnoringCase(property.value()->cssText(), "bold") || !elem->hasChildNodes();
break;
case CSSPropertyVerticalAlign:
if (elem->hasLocalName(subTag))
return !equalIgnoringCase(property.value()->cssText(), "sub") || !elem->hasChildNodes();
if (elem->hasLocalName(supTag))
return !equalIgnoringCase(property.value()->cssText(), "sup") || !elem->hasChildNodes();
break;
case CSSPropertyFontStyle:
// IE inserts "em" tags for execCommand("italic"), so we remove them, even though they're not strictly presentational
if (elem->hasLocalName(iTag) || elem->hasLocalName(emTag))
return !equalIgnoringCase(property.value()->cssText(), "italic") || !elem->hasChildNodes();
break;
case CSSPropertyTextDecoration:
case CSSPropertyWebkitTextDecorationsInEffect:
if (elem->hasLocalName(uTag))
return shouldRemoveTextDecorationTag(style, CSSValueUnderline) || !elem->hasChildNodes();
else if (elem->hasLocalName(sTag) || elem->hasTagName(strikeTag))
return shouldRemoveTextDecorationTag(style,CSSValueLineThrough) || !elem->hasChildNodes();
}
}
return false;
}
void ApplyStyleCommand::replaceWithSpanOrRemoveIfWithoutAttributes(HTMLElement*& elem)
{
bool removeNode = false;
// Similar to isSpanWithoutAttributesOrUnstyleStyleSpan, but does not look for Apple-style-span.
NamedNodeMap* attributes = elem->attributes(true); // readonly
if (!attributes || attributes->isEmpty())
removeNode = true;
else if (attributes->length() == 1 && elem->hasAttribute(styleAttr)) {
// Remove the element even if it has just style='' (this might be redundantly checked later too)
CSSMutableStyleDeclaration* inlineStyleDecl = elem->inlineStyleDecl();
if (!inlineStyleDecl || inlineStyleDecl->isEmpty())
removeNode = true;
}
if (removeNode)
removeNodePreservingChildren(elem);
else {
HTMLElement* newSpanElement = replaceNodeWithSpanPreservingChildrenAndAttributes(elem);
ASSERT(newSpanElement && newSpanElement->inDocument());
elem = newSpanElement;
}
}
void ApplyStyleCommand::removeHTMLFontStyle(CSSMutableStyleDeclaration *style, HTMLElement *elem)
{
ASSERT(style);
ASSERT(elem);
if (!elem->hasLocalName(fontTag))
return;
CSSMutableStyleDeclaration::const_iterator end = style->end();
for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {
switch ((*it).id()) {
case CSSPropertyColor:
removeNodeAttribute(elem, colorAttr);
break;
case CSSPropertyFontFamily:
removeNodeAttribute(elem, faceAttr);
break;
case CSSPropertyFontSize:
removeNodeAttribute(elem, sizeAttr);
break;
}
}
if (isEmptyFontTag(elem))
removeNodePreservingChildren(elem);
}
void ApplyStyleCommand::removeHTMLBidiEmbeddingStyle(CSSMutableStyleDeclaration *style, HTMLElement *elem)
{
ASSERT(style);
ASSERT(elem);
if (!elem->hasAttribute(dirAttr))
return;
if (!style->getPropertyCSSValue(CSSPropertyUnicodeBidi) && !style->getPropertyCSSValue(CSSPropertyDirection))
return;
removeNodeAttribute(elem, dirAttr);
// FIXME: should this be isSpanWithoutAttributesOrUnstyleStyleSpan? Need a test.
if (isUnstyledStyleSpan(elem))
removeNodePreservingChildren(elem);
}
void ApplyStyleCommand::removeCSSStyle(CSSMutableStyleDeclaration* style, HTMLElement* elem)
{
ASSERT(style);
ASSERT(elem);
CSSMutableStyleDeclaration* decl = elem->inlineStyleDecl();
if (!decl)
return;
CSSMutableStyleDeclaration::const_iterator end = style->end();
for (CSSMutableStyleDeclaration::const_iterator it = style->begin(); it != end; ++it) {
CSSPropertyID propertyID = static_cast<CSSPropertyID>((*it).id());
RefPtr<CSSValue> value = decl->getPropertyCSSValue(propertyID);
if (value && (propertyID != CSSPropertyWhiteSpace || !isTabSpanNode(elem))) {
removeCSSProperty(decl, propertyID);
if (propertyID == CSSPropertyUnicodeBidi && !decl->getPropertyValue(CSSPropertyDirection).isEmpty())
removeCSSProperty(decl, CSSPropertyDirection);
}
}
// No need to serialize <foo style=""> if we just removed the last css property
if (decl->isEmpty())
removeNodeAttribute(elem, styleAttr);
if (isSpanWithoutAttributesOrUnstyleStyleSpan(elem))
removeNodePreservingChildren(elem);
}
static bool hasTextDecorationProperty(Node *node)
{
if (!node->isElementNode())
return false;
RefPtr<CSSValue> value = computedStyle(node)->getPropertyCSSValue(CSSPropertyTextDecoration, DoNotUpdateLayout);
return value && !equalIgnoringCase(value->cssText(), "none");
}
static Node* highestAncestorWithTextDecoration(Node *node)
{
ASSERT(node);
Node* result = 0;
Node* unsplittableElement = unsplittableElementForPosition(Position(node, 0));
for (Node *n = node; n; n = n->parentNode()) {
if (hasTextDecorationProperty(n))
result = 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;
}
PassRefPtr<CSSMutableStyleDeclaration> ApplyStyleCommand::extractTextDecorationStyle(Node* node)
{
ASSERT(node);
ASSERT(node->isElementNode());
// non-html elements not handled yet
if (!node->isHTMLElement())
return 0;
HTMLElement *element = static_cast<HTMLElement *>(node);
RefPtr<CSSMutableStyleDeclaration> style = element->inlineStyleDecl();
if (!style)
return 0;
int properties[1] = { CSSPropertyTextDecoration };
RefPtr<CSSMutableStyleDeclaration> textDecorationStyle = style->copyPropertiesInSet(properties, 1);
RefPtr<CSSValue> property = style->getPropertyCSSValue(CSSPropertyTextDecoration);
if (property && !equalIgnoringCase(property->cssText(), "none"))
removeCSSProperty(style.get(), CSSPropertyTextDecoration);
return textDecorationStyle.release();
}
PassRefPtr<CSSMutableStyleDeclaration> ApplyStyleCommand::extractAndNegateTextDecorationStyle(Node* node)
{
ASSERT(node);
ASSERT(node->isElementNode());
// non-html elements not handled yet
if (!node->isHTMLElement())
return 0;
RefPtr<CSSComputedStyleDeclaration> nodeStyle = computedStyle(node);
ASSERT(nodeStyle);
int properties[1] = { CSSPropertyTextDecoration };
RefPtr<CSSMutableStyleDeclaration> textDecorationStyle = nodeStyle->copyPropertiesInSet(properties, 1);
RefPtr<CSSValue> property = nodeStyle->getPropertyCSSValue(CSSPropertyTextDecoration);
if (property && !equalIgnoringCase(property->cssText(), "none")) {
RefPtr<CSSMutableStyleDeclaration> newStyle = textDecorationStyle->copy();
newStyle->setProperty(CSSPropertyTextDecoration, "none");
applyTextDecorationStyle(node, newStyle.get());
}
return textDecorationStyle.release();
}
void ApplyStyleCommand::applyTextDecorationStyle(Node *node, CSSMutableStyleDeclaration *style)
{
ASSERT(node);
if (!style || style->cssText().isEmpty())
return;
StyleChange styleChange(style, Position(node, 0));
if (styleChange.cssStyle().length()) {
if (node->isTextNode()) {
RefPtr<HTMLElement> styleSpan = createStyleSpanElement(document());
surroundNodeRangeWithElement(node, node, styleSpan.get());
node = styleSpan.get();
}
if (!node->isElementNode())
return;
HTMLElement *element = static_cast<HTMLElement *>(node);
String cssText = styleChange.cssStyle();
CSSMutableStyleDeclaration *decl = element->inlineStyleDecl();
if (decl)
cssText += decl->cssText();
setNodeAttribute(element, styleAttr, cssText);
}
if (styleChange.applyUnderline())
surroundNodeRangeWithElement(node, node, createHTMLElement(document(), uTag));
if (styleChange.applyLineThrough())
surroundNodeRangeWithElement(node, node, createHTMLElement(document(), sTag));
}
void ApplyStyleCommand::pushDownTextDecorationStyleAroundNode(Node* targetNode, bool forceNegate)
{
ASSERT(targetNode);
Node* highestAncestor = highestAncestorWithTextDecoration(targetNode);
if (!highestAncestor)
return;
// The outer loop is traversing the tree vertically from highestAncestor to targetNode
Node* current = highestAncestor;
while (current != targetNode) {
ASSERT(current);
ASSERT(current->contains(targetNode));
RefPtr<CSSMutableStyleDeclaration> decoration = forceNegate ? extractAndNegateTextDecorationStyle(current) : extractTextDecorationStyle(current);
// The inner loop will go through children on each level
Node* child = current->firstChild();
while (child) {
Node* nextChild = child->nextSibling();
// Apply text decoration to all nodes containing targetNode and their siblings but NOT to targetNode
if (child != targetNode)
applyTextDecorationStyle(child, decoration.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;
child = nextChild;
}
}
}
void ApplyStyleCommand::pushDownTextDecorationStyleAtBoundaries(const Position &start, const Position &end)
{
// We need to work in two passes. First we push down any inline
// styles that set text decoration. Then we look for any remaining
// styles (caused by stylesheets) and explicitly negate text
// decoration while pushing down.
pushDownTextDecorationStyleAroundNode(start.node(), false);
updateLayout();
pushDownTextDecorationStyleAroundNode(start.node(), true);
pushDownTextDecorationStyleAroundNode(end.node(), false);
updateLayout();
pushDownTextDecorationStyleAroundNode(end.node(), true);
}
// FIXME: Why does this exist? Callers should either use lastOffsetForEditing or lastOffsetInNode
static int maxRangeOffset(Node *n)
{
if (n->offsetInCharacters())
return n->maxCharacterOffset();
if (n->isElementNode())
return n->childNodeCount();
return 1;
}
void ApplyStyleCommand::removeInlineStyle(PassRefPtr<CSSMutableStyleDeclaration> style, const Position &start, const Position &end)
{
ASSERT(start.isNotNull());
ASSERT(end.isNotNull());
ASSERT(start.node()->inDocument());
ASSERT(end.node()->inDocument());
ASSERT(comparePositions(start, end) <= 0);
RefPtr<CSSValue> textDecorationSpecialProperty = style->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect);
if (textDecorationSpecialProperty) {
pushDownTextDecorationStyleAtBoundaries(start.downstream(), end.upstream());
style = style->copy();
style->setProperty(CSSPropertyTextDecoration, textDecorationSpecialProperty->cssText(), style->getPropertyPriority(CSSPropertyWebkitTextDecorationsInEffect));
}
// 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.
Position s = start;
Position e = end;
Node* node = start.node();
while (node) {
Node* next = node->traverseNextNode();
if (node->isHTMLElement() && nodeFullySelected(node, start, end)) {
HTMLElement* elem = static_cast<HTMLElement*>(node);
Node* prev = elem->traversePreviousNodePostOrder();
Node* next = elem->traverseNextNode();
if (m_styledInlineElement && elem->hasTagName(m_styledInlineElement->tagQName()))
removeNodePreservingChildren(elem);
if (implicitlyStyledElementShouldBeRemovedWhenApplyingStyle(elem, style.get()))
replaceWithSpanOrRemoveIfWithoutAttributes(elem);
// 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 (elem->inDocument()) {
removeHTMLFontStyle(style.get(), elem);
removeHTMLBidiEmbeddingStyle(style.get(), elem);
removeCSSStyle(style.get(), elem);
}
if (!elem->inDocument()) {
if (s.node() == 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.deprecatedEditingOffset() <= caretMinOffset(s.node()));
s = Position(next, 0);
}
if (e.node() == 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(e.deprecatedEditingOffset() >= maxRangeOffset(e.node()));
e = Position(prev, maxRangeOffset(prev));
}
}
}
if (node == end.node())
break;
node = next;
}
ASSERT(s.node()->inDocument());
ASSERT(e.node()->inDocument());
updateStartEnd(s, e);
}
bool ApplyStyleCommand::nodeFullySelected(Node *node, const Position &start, const Position &end) const
{
ASSERT(node);
ASSERT(node->isElementNode());
Position pos = Position(node, node->childNodeCount()).upstream();
return comparePositions(Position(node, 0), start) >= 0 && comparePositions(pos, end) <= 0;
}
bool ApplyStyleCommand::nodeFullyUnselected(Node *node, const Position &start, const Position &end) const
{
ASSERT(node);
ASSERT(node->isElementNode());
Position pos = Position(node, node->childNodeCount()).upstream();
bool isFullyBeforeStart = comparePositions(pos, start) < 0;
bool isFullyAfterEnd = comparePositions(Position(node, 0), end) > 0;
return isFullyBeforeStart || isFullyAfterEnd;
}
bool ApplyStyleCommand::splitTextAtStartIfNeeded(const Position &start, const Position &end)
{
if (start.node()->isTextNode() && start.deprecatedEditingOffset() > caretMinOffset(start.node()) && start.deprecatedEditingOffset() < caretMaxOffset(start.node())) {
int endOffsetAdjustment = start.node() == end.node() ? start.deprecatedEditingOffset() : 0;
Text *text = static_cast<Text *>(start.node());
splitTextNode(text, start.deprecatedEditingOffset());
updateStartEnd(Position(start.node(), 0), Position(end.node(), end.deprecatedEditingOffset() - endOffsetAdjustment));
return true;
}
return false;
}
bool ApplyStyleCommand::splitTextAtEndIfNeeded(const Position &start, const Position &end)
{
if (end.node()->isTextNode() && end.deprecatedEditingOffset() > caretMinOffset(end.node()) && end.deprecatedEditingOffset() < caretMaxOffset(end.node())) {
Text *text = static_cast<Text *>(end.node());
splitTextNode(text, end.deprecatedEditingOffset());
Node *prevNode = text->previousSibling();
ASSERT(prevNode);
Node *startNode = start.node() == end.node() ? prevNode : start.node();
ASSERT(startNode);
updateStartEnd(Position(startNode, start.deprecatedEditingOffset()), Position(prevNode, caretMaxOffset(prevNode)));
return true;
}
return false;
}
bool ApplyStyleCommand::splitTextElementAtStartIfNeeded(const Position &start, const Position &end)
{
if (start.node()->isTextNode() && start.deprecatedEditingOffset() > caretMinOffset(start.node()) && start.deprecatedEditingOffset() < caretMaxOffset(start.node())) {
int endOffsetAdjustment = start.node() == end.node() ? start.deprecatedEditingOffset() : 0;
Text *text = static_cast<Text *>(start.node());
splitTextNodeContainingElement(text, start.deprecatedEditingOffset());
updateStartEnd(Position(start.node()->parentNode(), start.node()->nodeIndex()), Position(end.node(), end.deprecatedEditingOffset() - endOffsetAdjustment));
return true;
}
return false;
}
bool ApplyStyleCommand::splitTextElementAtEndIfNeeded(const Position &start, const Position &end)
{
if (end.node()->isTextNode() && end.deprecatedEditingOffset() > caretMinOffset(end.node()) && end.deprecatedEditingOffset() < caretMaxOffset(end.node())) {
Text *text = static_cast<Text *>(end.node());
splitTextNodeContainingElement(text, end.deprecatedEditingOffset());
Node *prevNode = text->parent()->previousSibling()->lastChild();
ASSERT(prevNode);
Node *startNode = start.node() == end.node() ? prevNode : start.node();
ASSERT(startNode);
updateStartEnd(Position(startNode, start.deprecatedEditingOffset()), Position(prevNode->parent(), prevNode->nodeIndex() + 1));
return true;
}
return false;
}
static bool areIdenticalElements(Node *first, Node *second)
{
// check that tag name and all attribute names and values are identical
if (!first->isElementNode())
return false;
if (!second->isElementNode())
return false;
Element *firstElement = static_cast<Element *>(first);
Element *secondElement = static_cast<Element *>(second);
if (!firstElement->tagQName().matches(secondElement->tagQName()))
return false;
NamedNodeMap *firstMap = firstElement->attributes();
NamedNodeMap *secondMap = secondElement->attributes();
unsigned firstLength = firstMap->length();
if (firstLength != secondMap->length())
return false;
for (unsigned i = 0; i < firstLength; i++) {
Attribute *attribute = firstMap->attributeItem(i);
Attribute *secondAttribute = secondMap->getAttributeItem(attribute->name());
if (!secondAttribute || attribute->value() != secondAttribute->value())
return false;
}
return true;
}
bool ApplyStyleCommand::mergeStartWithPreviousIfIdentical(const Position &start, const Position &end)
{
Node *startNode = start.node();
int startOffset = start.deprecatedEditingOffset();
if (isAtomicNode(start.node())) {
if (start.deprecatedEditingOffset() != 0)
return false;
// note: prior siblings could be unrendered elements. it's silly to miss the
// merge opportunity just for that.
if (start.node()->previousSibling())
return false;
startNode = start.node()->parent();
startOffset = 0;
}
if (!startNode->isElementNode())
return false;
if (startOffset != 0)
return false;
Node *previousSibling = startNode->previousSibling();
if (previousSibling && areIdenticalElements(startNode, previousSibling)) {
Element *previousElement = static_cast<Element *>(previousSibling);
Element *element = static_cast<Element *>(startNode);
Node *startChild = element->firstChild();
ASSERT(startChild);
mergeIdenticalElements(previousElement, element);
int startOffsetAdjustment = startChild->nodeIndex();
int endOffsetAdjustment = startNode == end.node() ? startOffsetAdjustment : 0;
updateStartEnd(Position(startNode, startOffsetAdjustment), Position(end.node(), end.deprecatedEditingOffset() + endOffsetAdjustment));
return true;
}
return false;
}
bool ApplyStyleCommand::mergeEndWithNextIfIdentical(const Position &start, const Position &end)
{
Node *endNode = end.node();
int endOffset = end.deprecatedEditingOffset();
if (isAtomicNode(endNode)) {
if (endOffset < caretMaxOffset(endNode))
return false;
unsigned parentLastOffset = end.node()->parent()->childNodes()->length() - 1;
if (end.node()->nextSibling())
return false;
endNode = end.node()->parent();
endOffset = parentLastOffset;
}
if (!endNode->isElementNode() || endNode->hasTagName(brTag))
return false;
Node *nextSibling = endNode->nextSibling();
if (nextSibling && areIdenticalElements(endNode, nextSibling)) {
Element *nextElement = static_cast<Element *>(nextSibling);
Element *element = static_cast<Element *>(endNode);
Node *nextChild = nextElement->firstChild();
mergeIdenticalElements(element, nextElement);
Node *startNode = start.node() == endNode ? nextElement : start.node();
ASSERT(startNode);
int endOffset = nextChild ? nextChild->nodeIndex() : nextElement->childNodes()->length();
updateStartEnd(Position(startNode, start.deprecatedEditingOffset()), Position(nextElement, endOffset));
return true;
}
return false;
}
void ApplyStyleCommand::surroundNodeRangeWithElement(Node* startNode, Node* endNode, PassRefPtr<Element> elementToInsert)
{
ASSERT(startNode);
ASSERT(endNode);
ASSERT(elementToInsert);
RefPtr<Element> element = elementToInsert;
insertNodeBefore(element, startNode);
Node* node = startNode;
while (1) {
Node* next = node->traverseNextNode();
if (node->childNodeCount() == 0 && node->renderer() && node->renderer()->isInline()) {
removeNode(node);
appendNode(node, element);
}
if (node == endNode)
break;
node = next;
}
Node* nextSibling = element->nextSibling();
Node* previousSibling = element->previousSibling();
if (nextSibling && nextSibling->isElementNode() && nextSibling->isContentEditable()
&& areIdenticalElements(element.get(), static_cast<Element*>(nextSibling)))
mergeIdenticalElements(element, static_cast<Element*>(nextSibling));
if (previousSibling && previousSibling->isElementNode() && previousSibling->isContentEditable()) {
Node* mergedElement = previousSibling->nextSibling();
if (mergedElement->isElementNode() && mergedElement->isContentEditable()
&& areIdenticalElements(static_cast<Element*>(previousSibling), static_cast<Element*>(mergedElement)))
mergeIdenticalElements(static_cast<Element*>(previousSibling), static_cast<Element*>(mergedElement));
}
// FIXME: We should probably call updateStartEnd if the start or end was in the node
// range so that the endingSelection() is canonicalized. See the comments at the end of
// VisibleSelection::validate().
}
void ApplyStyleCommand::addBlockStyle(const StyleChange& styleChange, HTMLElement* block)
{
// Do not check for legacy styles here. Those styles, like <B> and <I>, only apply for
// inline content.
if (!block)
return;
String cssText = styleChange.cssStyle();
CSSMutableStyleDeclaration* decl = block->inlineStyleDecl();
if (decl)
cssText += decl->cssText();
setNodeAttribute(block, styleAttr, cssText);
}
static bool fontColorChangesComputedStyle(RenderStyle* computedStyle, StyleChange styleChange)
{
if (styleChange.applyFontColor()) {
if (Color(styleChange.fontColor()) != computedStyle->color())
return true;
}
return false;
}
static bool fontSizeChangesComputedStyle(RenderStyle* computedStyle, StyleChange styleChange)
{
if (styleChange.applyFontSize()) {
if (styleChange.fontSize().toInt() != computedStyle->fontSize())
return true;
}
return false;
}
static bool fontFaceChangesComputedStyle(RenderStyle* computedStyle, StyleChange styleChange)
{
if (styleChange.applyFontFace()) {
if (computedStyle->fontDescription().family().family().string() != styleChange.fontFace())
return true;
}
return false;
}
void ApplyStyleCommand::addInlineStyleIfNeeded(CSSMutableStyleDeclaration *style, Node *startNode, Node *endNode)
{
if (m_removeOnly)
return;
StyleChange styleChange(style, Position(startNode, 0));
//
// Font tags need to go outside of CSS so that CSS font sizes override leagcy font sizes.
//
if (styleChange.applyFontColor() || styleChange.applyFontFace() || styleChange.applyFontSize()) {
RefPtr<Element> fontElement = createFontElement(document());
RenderStyle* computedStyle = startNode->computedStyle();
// We only want to insert a font element if it will end up changing the style of the
// text somehow. Otherwise it will be a garbage node that will create problems for us
// most notably when we apply a blockquote style for a message reply.
if (fontColorChangesComputedStyle(computedStyle, styleChange)
|| fontFaceChangesComputedStyle(computedStyle, styleChange)
|| fontSizeChangesComputedStyle(computedStyle, styleChange)) {
if (styleChange.applyFontColor())
fontElement->setAttribute(colorAttr, styleChange.fontColor());
if (styleChange.applyFontFace())
fontElement->setAttribute(faceAttr, styleChange.fontFace());
if (styleChange.applyFontSize())
fontElement->setAttribute(sizeAttr, styleChange.fontSize());
surroundNodeRangeWithElement(startNode, endNode, fontElement.get());
}
}
if (styleChange.cssStyle().length()) {
RefPtr<Element> styleElement = createStyleSpanElement(document());
styleElement->setAttribute(styleAttr, 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(), sTag));
if (styleChange.applySubscript())
surroundNodeRangeWithElement(startNode, endNode, createHTMLElement(document(), subTag));
else if (styleChange.applySuperscript())
surroundNodeRangeWithElement(startNode, endNode, createHTMLElement(document(), supTag));
if (m_styledInlineElement)
surroundNodeRangeWithElement(startNode, endNode, m_styledInlineElement->cloneElementWithoutChildren());
}
float ApplyStyleCommand::computedFontSize(const Node *node)
{
if (!node)
return 0;
Position pos(const_cast<Node *>(node), 0);
RefPtr<CSSComputedStyleDeclaration> computedStyle = pos.computedStyle();
if (!computedStyle)
return 0;
RefPtr<CSSPrimitiveValue> value = static_pointer_cast<CSSPrimitiveValue>(computedStyle->getPropertyCSSValue(CSSPropertyFontSize));
if (!value)
return 0;
return value->getFloatValue(CSSPrimitiveValue::CSS_PX);
}
void ApplyStyleCommand::joinChildTextNodes(Node *node, const Position &start, const Position &end)
{
if (!node)
return;
Position newStart = start;
Position newEnd = end;
Node *child = node->firstChild();
while (child) {
Node *next = child->nextSibling();
if (child->isTextNode() && next && next->isTextNode()) {
Text *childText = static_cast<Text *>(child);
Text *nextText = static_cast<Text *>(next);
if (next == start.node())
newStart = Position(childText, childText->length() + start.deprecatedEditingOffset());
if (next == end.node())
newEnd = Position(childText, childText->length() + end.deprecatedEditingOffset());
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.
}
else {
child = child->nextSibling();
}
}
updateStartEnd(newStart, newEnd);
}
}