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