/
markup.cpp
1534 lines (1299 loc) · 63.7 KB
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markup.cpp
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/*
* Copyright (C) 2004-2024 Apple Inc. All rights reserved.
* Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
* Copyright (C) 2011 Igalia S.L.
* Copyright (C) 2011 Motorola Mobility. 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 "markup.h"
#include "ArchiveResource.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CSSValue.h"
#include "CSSValueKeywords.h"
#include "CacheStorageProvider.h"
#include "ChildListMutationScope.h"
#include "Comment.h"
#include "CommonAtomStrings.h"
#include "ComposedTreeIterator.h"
#include "DeprecatedGlobalSettings.h"
#include "Document.h"
#include "DocumentFragment.h"
#include "DocumentInlines.h"
#include "DocumentLoader.h"
#include "DocumentType.h"
#include "Editing.h"
#include "Editor.h"
#include "EditorClient.h"
#include "ElementChildIteratorInlines.h"
#include "ElementRareData.h"
#include "EmptyClients.h"
#include "File.h"
#include "FrameLoader.h"
#include "HTMLAttachmentElement.h"
#include "HTMLBRElement.h"
#include "HTMLBaseElement.h"
#include "HTMLBodyElement.h"
#include "HTMLDivElement.h"
#include "HTMLHeadElement.h"
#include "HTMLHtmlElement.h"
#include "HTMLImageElement.h"
#include "HTMLNames.h"
#include "HTMLPictureElement.h"
#include "HTMLStyleElement.h"
#include "HTMLTableElement.h"
#include "HTMLTextAreaElement.h"
#include "HTMLTextFormControlElement.h"
#include "LocalFrame.h"
#include "MarkupAccumulator.h"
#include "MutableStyleProperties.h"
#include "NodeList.h"
#include "Page.h"
#include "PageConfiguration.h"
#include "PasteboardItemInfo.h"
#include "Quirks.h"
#include "Range.h"
#include "RenderBlock.h"
#include "ScriptWrappableInlines.h"
#include "Settings.h"
#include "SocketProvider.h"
#include "TextIterator.h"
#include "TextManipulationController.h"
#include "TypedElementDescendantIteratorInlines.h"
#include "VisibleSelection.h"
#include "VisibleUnits.h"
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <wtf/StdLibExtras.h>
#include <wtf/URL.h>
#include <wtf/URLParser.h>
#include <wtf/text/StringBuilder.h>
#if ENABLE(DATA_DETECTION)
#include "DataDetection.h"
#endif
namespace WebCore {
using namespace HTMLNames;
static bool propertyMissingOrEqualToNone(const StyleProperties*, CSSPropertyID);
class AttributeChange {
public:
AttributeChange()
: m_name(nullAtom(), nullAtom(), nullAtom())
{
}
AttributeChange(RefPtr<Element>&& element, QualifiedName&& name, AtomString&& value)
: m_element(WTFMove(element))
, m_name(WTFMove(name))
, m_value(WTFMove(value))
{
}
void apply()
{
m_element->setAttribute(m_name, m_value);
}
private:
RefPtr<Element> m_element;
QualifiedName m_name;
AtomString m_value;
};
static void completeURLs(DocumentFragment* fragment, const String& baseURL)
{
Vector<AttributeChange> changes;
URL parsedBaseURL({ }, baseURL);
for (Ref element : descendantsOfType<Element>(*fragment)) {
if (!element->hasAttributes())
continue;
for (const Attribute& attribute : element->attributesIterator()) {
if (element->attributeContainsURL(attribute) && !attribute.value().isEmpty())
changes.append(AttributeChange(element.copyRef(), QualifiedName { attribute.name() }, AtomString { element->completeURLsInAttributeValue(parsedBaseURL, attribute) }));
}
}
for (auto& change : changes)
change.apply();
}
void replaceSubresourceURLs(Ref<DocumentFragment>&& fragment, HashMap<AtomString, AtomString>&& replacementMap)
{
Vector<AttributeChange> changes;
for (Ref element : descendantsOfType<Element>(fragment)) {
if (!element->hasAttributes())
continue;
for (const Attribute& attribute : element->attributesIterator()) {
// FIXME: This won't work for srcset.
if (element->attributeContainsURL(attribute) && !attribute.value().isEmpty()) {
auto replacement = replacementMap.get(attribute.value());
if (!replacement.isNull())
changes.append({ element.copyRef(), QualifiedName { attribute.name() }, WTFMove(replacement) });
}
}
}
for (auto& change : changes)
change.apply();
}
struct ElementAttribute {
Ref<Element> element;
QualifiedName attributeName;
};
void removeSubresourceURLAttributes(Ref<DocumentFragment>&& fragment, Function<bool(const URL&)> shouldRemoveURL)
{
Vector<ElementAttribute> attributesToRemove;
for (Ref element : descendantsOfType<Element>(fragment)) {
if (!element->hasAttributes())
continue;
for (const Attribute& attribute : element->attributesIterator()) {
// FIXME: This won't work for srcset.
if (element->attributeContainsURL(attribute) && !attribute.value().isEmpty()) {
if (shouldRemoveURL(URL { attribute.value() }))
attributesToRemove.append({ element.copyRef(), attribute.name() });
}
}
}
for (auto& [element, attribute] : attributesToRemove)
element->removeAttribute(attribute);
}
Ref<Page> createPageForSanitizingWebContent()
{
auto pageConfiguration = pageConfigurationWithEmptyClients(std::nullopt, PAL::SessionID::defaultSessionID());
Ref page = Page::create(WTFMove(pageConfiguration));
#if ENABLE(VIDEO)
page->settings().setMediaEnabled(false);
#endif
page->settings().setScriptEnabled(false);
page->settings().setHTMLParserScriptingFlagPolicy(HTMLParserScriptingFlagPolicy::Enabled);
page->settings().setAcceleratedCompositingEnabled(false);
page->settings().setLinkPreloadEnabled(false);
RefPtr frame = dynamicDowncast<LocalFrame>(page->mainFrame());
if (!frame)
return page;
frame->setView(LocalFrameView::create(*frame, IntSize { 800, 600 }));
frame->init();
FrameLoader& loader = frame->loader();
static constexpr ASCIILiteral markup = "<!DOCTYPE html><html><body></body></html>"_s;
RefPtr activeDocumentLoader = loader.activeDocumentLoader();
ASSERT(activeDocumentLoader);
auto& writer = activeDocumentLoader->writer();
writer.setMIMEType("text/html"_s);
writer.begin();
writer.insertDataSynchronously(markup);
writer.end();
RELEASE_ASSERT(frame->document()->body());
return page;
}
String sanitizeMarkup(const String& rawHTML, MSOListQuirks msoListQuirks, std::optional<Function<void(DocumentFragment&)>> fragmentSanitizer)
{
Ref page = createPageForSanitizingWebContent();
RefPtr localMainFrame = dynamicDowncast<LocalFrame>(page->mainFrame());
if (!localMainFrame)
return String();
RefPtr stagingDocument = localMainFrame->document();
ASSERT(stagingDocument);
auto fragment = createFragmentFromMarkup(*stagingDocument, rawHTML, emptyString(), { });
if (fragmentSanitizer)
(*fragmentSanitizer)(fragment);
return sanitizedMarkupForFragmentInDocument(WTFMove(fragment), *stagingDocument, msoListQuirks, rawHTML);
}
UserSelectNoneStateCache::UserSelectNoneStateCache(TreeType treeType)
: m_useComposedTree(treeType == ComposedTree)
{
ASSERT(treeType == Tree || treeType == ComposedTree);
}
ContainerNode* UserSelectNoneStateCache::parentNode(Node& node)
{
if (m_useComposedTree)
return node.parentInComposedTree();
return node.parentOrShadowHostNode();
}
Node* UserSelectNoneStateCache::firstChild(Node& node)
{
if (m_useComposedTree)
return firstChildInComposedTreeIgnoringUserAgentShadow(node);
return node.firstChild();
}
Node* UserSelectNoneStateCache::nextSibling(Node& node)
{
if (m_useComposedTree)
return nextSiblingInComposedTreeIgnoringUserAgentShadow(node);
return node.nextSibling();
}
auto UserSelectNoneStateCache::computeState(Node& targetNode) -> State
{
auto it = m_cache.find(targetNode);
if (it != m_cache.end())
return it->value;
if (!Position::nodeIsUserSelectNone(&targetNode))
return State::NotUserSelectNone;
auto state = State::OnlyUserSelectNone;
RefPtr currentNode = &targetNode;
bool foundMixed = false;
while (currentNode) {
if (!Position::nodeIsUserSelectNone(currentNode.get())) {
state = State::Mixed;
// Only traverse upward once any mixed content is found
// since inner element may only contain user-select: none but we won't be able to tell apart.
foundMixed = true;
}
if (RefPtr child = firstChild(*currentNode); child && !foundMixed)
currentNode = WTFMove(child);
else if (currentNode == &targetNode)
break;
else if (RefPtr sibling = nextSibling(*currentNode); sibling && !foundMixed)
currentNode = WTFMove(sibling);
else {
RefPtr<Node> ancestor;
for (ancestor = parentNode(*currentNode); ancestor; ancestor = parentNode(*ancestor)) {
m_cache.set(*ancestor, state);
if (ancestor == &targetNode) {
currentNode = nullptr;
break;
}
if (RefPtr sibling = nextSibling(*ancestor); sibling && !foundMixed) {
currentNode = WTFMove(sibling);
break;
}
}
if (!ancestor)
currentNode = nullptr;
}
}
return state;
}
enum class MSOListMode : bool { Preserve, DoNotPreserve };
class StyledMarkupAccumulator final : public MarkupAccumulator {
public:
enum RangeFullySelectsNode { DoesFullySelectNode, DoesNotFullySelectNode };
StyledMarkupAccumulator(const Position& start, const Position& end, Vector<Ref<Node>>* nodes, ResolveURLs, SerializeComposedTree, IgnoreUserSelectNone,
AnnotateForInterchange, StandardFontFamilySerializationMode, MSOListMode, bool needsPositionStyleConversion, Node* highestNodeToBeSerialized = nullptr);
RefPtr<Node> serializeNodes(const Position& start, const Position& end);
void wrapWithNode(Node&, bool convertBlocksToInlines = false, RangeFullySelectsNode = DoesFullySelectNode);
void wrapWithStyleNode(StyleProperties*, Document&, bool isBlock = false);
String takeResults();
bool needRelativeStyleWrapper() const { return m_needRelativeStyleWrapper; }
bool needClearingDiv() const { return m_needClearingDiv; }
using MarkupAccumulator::append;
ContainerNode* parentNode(Node& node)
{
if (UNLIKELY(m_useComposedTree))
return node.parentInComposedTree();
return node.parentOrShadowHostNode();
}
void prependHeadIfNecessary(const HTMLBaseElement* baseElement)
{
#if PLATFORM(COCOA)
// On Cocoa platforms, this markup is eventually persisted to the pasteboard and read back as UTF-8 data,
// so this meta tag is needed for clients that read this data in the future from the pasteboard and load it.
bool shouldAppendMetaCharset = !containsOnlyASCII();
#else
bool shouldAppendMetaCharset = false;
#endif
if (!shouldAppendMetaCharset && !baseElement)
return;
m_reversedPrecedingMarkup.append("</head>"_s);
if (baseElement) {
StringBuilder markupForBase;
appendStartTag(markupForBase, *baseElement, false, DoesNotFullySelectNode);
m_reversedPrecedingMarkup.append(markupForBase.toString());
}
if (shouldAppendMetaCharset)
m_reversedPrecedingMarkup.append("<meta charset=\"UTF-8\">"_s);
m_reversedPrecedingMarkup.append("<head>"_s);
}
private:
bool containsOnlyASCII() const;
void appendStyleNodeOpenTag(StringBuilder&, StyleProperties*, Document&, bool isBlock = false);
const String& styleNodeCloseTag(bool isBlock = false);
String renderedTextRespectingRange(const Text&);
String textContentRespectingRange(const Text&);
bool shouldPreserveMSOListStyleForElement(const Element&);
enum class SpanReplacementType : uint8_t {
None,
Slot,
#if ENABLE(DATA_DETECTION)
DataDetector,
#endif
};
SpanReplacementType spanReplacementForElement(const Element&);
void appendStartTag(StringBuilder& out, const Element&, bool addDisplayInline, RangeFullySelectsNode);
void appendEndTag(StringBuilder& out, const Element&) override;
void appendCustomAttributes(StringBuilder&, const Element&, Namespaces*) override;
void appendText(StringBuilder& out, const Text&) override;
void appendStartTag(StringBuilder& out, const Element& element, Namespaces*) override
{
appendStartTag(out, element, false, DoesFullySelectNode);
}
Node* firstChild(Node& node)
{
if (UNLIKELY(m_useComposedTree))
return firstChildInComposedTreeIgnoringUserAgentShadow(node);
return node.firstChild();
}
Node* nextSibling(Node& node)
{
if (UNLIKELY(m_useComposedTree))
return nextSiblingInComposedTreeIgnoringUserAgentShadow(node);
return node.nextSibling();
}
Node* nextSkippingChildren(Node& node)
{
if (UNLIKELY(m_useComposedTree))
return nextSkippingChildrenInComposedTreeIgnoringUserAgentShadow(node);
return NodeTraversal::nextSkippingChildren(node);
}
bool hasChildNodes(Node& node)
{
if (UNLIKELY(m_useComposedTree))
return firstChildInComposedTreeIgnoringUserAgentShadow(node);
return node.hasChildNodes();
}
bool isDescendantOf(Node& node, Node& possibleAncestor)
{
if (UNLIKELY(m_useComposedTree))
return node.isDescendantOrShadowDescendantOf(&possibleAncestor);
return node.isDescendantOf(&possibleAncestor);
}
enum class NodeTraversalMode { EmitString, DoNotEmitString };
RefPtr<Node> traverseNodesForSerialization(Node& startNode, Node* pastEnd, NodeTraversalMode);
bool appendNodeToPreserveMSOList(Node&);
bool shouldAnnotate()
{
return m_annotate == AnnotateForInterchange::Yes;
}
bool shouldApplyWrappingStyle(const Node& node) const
{
return m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode() == node.parentNode() && m_wrappingStyle && m_wrappingStyle->style();
}
Position m_start;
Position m_end;
Vector<String> m_reversedPrecedingMarkup;
const AnnotateForInterchange m_annotate;
RefPtr<Node> m_highestNodeToBeSerialized;
RefPtr<EditingStyle> m_wrappingStyle;
bool m_useComposedTree;
bool m_ignoresUserSelectNone;
bool m_needsPositionStyleConversion;
StandardFontFamilySerializationMode m_standardFontFamilySerializationMode;
bool m_shouldPreserveMSOList;
bool m_needRelativeStyleWrapper { false };
bool m_needClearingDiv { false };
bool m_inMSOList { false };
};
inline StyledMarkupAccumulator::StyledMarkupAccumulator(const Position& start, const Position& end, Vector<Ref<Node>>* nodes, ResolveURLs resolveURLs,
SerializeComposedTree serializeComposedTree, IgnoreUserSelectNone ignoreUserSelectNone, AnnotateForInterchange annotate,
StandardFontFamilySerializationMode standardFontFamilySerializationMode, MSOListMode msoListMode, bool needsPositionStyleConversion, Node* highestNodeToBeSerialized)
: MarkupAccumulator(nodes, resolveURLs, start.document()->isHTMLDocument() ? SerializationSyntax::HTML : SerializationSyntax::XML)
, m_start(start)
, m_end(end)
, m_annotate(annotate)
, m_highestNodeToBeSerialized(highestNodeToBeSerialized)
, m_useComposedTree(serializeComposedTree == SerializeComposedTree::Yes)
, m_ignoresUserSelectNone(ignoreUserSelectNone == IgnoreUserSelectNone::Yes && !start.document()->quirks().needsToCopyUserSelectNoneQuirk())
, m_needsPositionStyleConversion(needsPositionStyleConversion)
, m_standardFontFamilySerializationMode(standardFontFamilySerializationMode)
, m_shouldPreserveMSOList(msoListMode == MSOListMode::Preserve)
{
}
void StyledMarkupAccumulator::wrapWithNode(Node& node, bool convertBlocksToInlines, RangeFullySelectsNode rangeFullySelectsNode)
{
StringBuilder markup;
if (RefPtr element = dynamicDowncast<Element>(node))
appendStartTag(markup, *element, convertBlocksToInlines && isBlock(node), rangeFullySelectsNode);
else
appendNonElementNode(markup, node, nullptr);
m_reversedPrecedingMarkup.append(markup.toString());
endAppendingNode(node);
if (m_nodes)
m_nodes->append(node);
}
void StyledMarkupAccumulator::wrapWithStyleNode(StyleProperties* style, Document& document, bool isBlock)
{
StringBuilder openTag;
appendStyleNodeOpenTag(openTag, style, document, isBlock);
m_reversedPrecedingMarkup.append(openTag.toString());
append(styleNodeCloseTag(isBlock));
}
void StyledMarkupAccumulator::appendStyleNodeOpenTag(StringBuilder& out, StyleProperties* style, Document& document, bool isBlock)
{
// With AnnotateForInterchange::Yes, wrappingStyleForSerialization should have removed -webkit-text-decorations-in-effect
ASSERT(!shouldAnnotate() || propertyMissingOrEqualToNone(style, CSSPropertyWebkitTextDecorationsInEffect));
if (isBlock)
out.append("<div style=\""_s);
else
out.append("<span style=\""_s);
appendAttributeValue(out, style->asText(), document.isHTMLDocument());
out.append("\">"_s);
}
const String& StyledMarkupAccumulator::styleNodeCloseTag(bool isBlock)
{
static NeverDestroyed<const String> divClose(MAKE_STATIC_STRING_IMPL("</div>"));
static NeverDestroyed<const String> styleSpanClose(MAKE_STATIC_STRING_IMPL("</span>"));
return isBlock ? divClose : styleSpanClose;
}
bool StyledMarkupAccumulator::containsOnlyASCII() const
{
for (auto& preceding : m_reversedPrecedingMarkup) {
if (!preceding.containsOnlyASCII())
return false;
}
return MarkupAccumulator::containsOnlyASCII();
}
String StyledMarkupAccumulator::takeResults()
{
CheckedUint32 length = this->length();
for (auto& string : m_reversedPrecedingMarkup)
length += string.length();
StringBuilder result;
result.reserveCapacity(length);
for (auto& string : makeReversedRange(m_reversedPrecedingMarkup))
result.append(string);
result.append(takeMarkup());
// Remove '\0' characters because they are not visibly rendered to the user.
return makeStringByReplacingAll(result.toString(), '\0', ""_s);
}
void StyledMarkupAccumulator::appendText(StringBuilder& out, const Text& text)
{
const bool parentIsTextarea = is<HTMLTextAreaElement>(text.parentElement());
const bool wrappingSpan = shouldApplyWrappingStyle(text) && !parentIsTextarea;
if (wrappingSpan) {
auto wrappingStyle = m_wrappingStyle->copy();
// FIXME: <rdar://problem/5371536> Style rules that match pasted content can change it's appearance
// Make sure spans are inline style in paste side e.g. span { display: block }.
wrappingStyle->forceInline();
// FIXME: Should this be included in forceInline?
wrappingStyle->style()->setProperty(CSSPropertyFloat, CSSValueNone);
appendStyleNodeOpenTag(out, wrappingStyle->style(), text.protectedDocument());
}
if (!shouldAnnotate() || parentIsTextarea) {
auto content = textContentRespectingRange(text);
appendCharactersReplacingEntities(out, content, 0, content.length(), entityMaskForText(text));
} else {
const bool useRenderedText = !enclosingElementWithTag(firstPositionInNode(const_cast<Text*>(&text)), selectTag);
String content = useRenderedText ? renderedTextRespectingRange(text) : textContentRespectingRange(text);
StringBuilder buffer;
appendCharactersReplacingEntities(buffer, content, 0, content.length(), EntityMaskInPCDATA);
out.append(convertHTMLTextToInterchangeFormat(buffer.toString(), &text));
}
if (wrappingSpan)
out.append(styleNodeCloseTag());
}
String StyledMarkupAccumulator::renderedTextRespectingRange(const Text& text)
{
TextIteratorBehaviors behaviors;
Position start = &text == m_start.containerNode() ? m_start : firstPositionInNode(const_cast<Text*>(&text));
Position end;
if (&text == m_end.containerNode())
end = m_end;
else {
end = lastPositionInNode(const_cast<Text*>(&text));
if (!m_end.isNull())
behaviors.add(TextIteratorBehavior::BehavesAsIfNodesFollowing);
}
if (m_ignoresUserSelectNone)
behaviors.add(TextIteratorBehavior::IgnoresUserSelectNone);
auto range = makeSimpleRange(start, end);
return range ? plainText(*range, behaviors) : emptyString();
}
String StyledMarkupAccumulator::textContentRespectingRange(const Text& text)
{
if (m_start.isNull() && m_end.isNull())
return text.data();
unsigned start = 0;
unsigned end = std::numeric_limits<unsigned>::max();
if (&text == m_start.containerNode())
start = m_start.offsetInContainerNode();
if (&text == m_end.containerNode())
end = m_end.offsetInContainerNode();
ASSERT(start < end);
return text.data().substring(start, end - start);
}
void StyledMarkupAccumulator::appendCustomAttributes(StringBuilder& out, const Element& element, Namespaces* namespaces)
{
#if ENABLE(ATTACHMENT_ELEMENT)
if (!DeprecatedGlobalSettings::attachmentElementEnabled())
return;
if (RefPtr attachment = dynamicDowncast<HTMLAttachmentElement>(element)) {
appendAttribute(out, element, { webkitattachmentidAttr, AtomString { attachment->uniqueIdentifier() } }, namespaces);
if (RefPtr file = attachment->file()) {
// These attributes are only intended for File deserialization, and are removed from the generated attachment
// element after we've deserialized and set its backing File, in restoreAttachmentElementsInFragment.
appendAttribute(out, element, { webkitattachmentpathAttr, AtomString { file->path() } }, namespaces);
appendAttribute(out, element, { webkitattachmentbloburlAttr, AtomString { file->url().string() } }, namespaces);
}
} else if (RefPtr imgElement = dynamicDowncast<HTMLImageElement>(element)) {
if (RefPtr attachment = imgElement->attachmentElement())
appendAttribute(out, element, { webkitattachmentidAttr, AtomString { attachment->uniqueIdentifier() } }, namespaces);
}
#else
UNUSED_PARAM(out);
UNUSED_PARAM(element);
UNUSED_PARAM(namespaces);
#endif
}
bool StyledMarkupAccumulator::shouldPreserveMSOListStyleForElement(const Element& element)
{
if (m_inMSOList)
return true;
if (m_shouldPreserveMSOList) {
auto style = element.getAttribute(styleAttr);
return style.startsWith("mso-list:"_s) || style.contains(";mso-list:"_s) || style.contains("\nmso-list:"_s);
}
return false;
}
StyledMarkupAccumulator::SpanReplacementType StyledMarkupAccumulator::spanReplacementForElement(const Element& element)
{
if (is<HTMLSlotElement>(element))
return SpanReplacementType::Slot;
#if ENABLE(DATA_DETECTION)
if (DataDetection::isDataDetectorElement(element))
return SpanReplacementType::DataDetector;
#endif
return SpanReplacementType::None;
}
void StyledMarkupAccumulator::appendStartTag(StringBuilder& out, const Element& element, bool addDisplayInline, RangeFullySelectsNode rangeFullySelectsNode)
{
const bool documentIsHTML = element.document().isHTMLDocument();
auto replacementType = spanReplacementForElement(element);
if (UNLIKELY(replacementType != SpanReplacementType::None))
out.append("<span"_s);
else
appendOpenTag(out, element, nullptr);
appendCustomAttributes(out, element, nullptr);
const bool shouldAnnotateOrForceInline = element.isHTMLElement() && (shouldAnnotate() || addDisplayInline);
bool shouldOverrideStyleAttr = (shouldAnnotateOrForceInline || shouldApplyWrappingStyle(element) || replacementType != SpanReplacementType::None) && !shouldPreserveMSOListStyleForElement(element);
if (element.hasAttributes()) {
for (const Attribute& attribute : element.attributesIterator()) {
// We'll handle the style attribute separately, below.
if (attribute.name() == styleAttr && shouldOverrideStyleAttr)
continue;
if (element.isEventHandlerAttribute(attribute) || element.attributeContainsJavaScriptURL(attribute))
continue;
#if ENABLE(DATA_DETECTION)
if (replacementType == SpanReplacementType::DataDetector && DataDetection::isDataDetectorAttribute(attribute.name()))
continue;
#endif
appendAttribute(out, element, attribute, 0);
}
}
if (shouldOverrideStyleAttr) {
RefPtr<EditingStyle> newInlineStyle;
if (shouldApplyWrappingStyle(element)) {
newInlineStyle = m_wrappingStyle->copy();
newInlineStyle->removePropertiesInElementDefaultStyle(*const_cast<Element*>(&element));
newInlineStyle->removeStyleConflictingWithStyleOfNode(*const_cast<Element*>(&element));
} else
newInlineStyle = EditingStyle::create();
if (replacementType == SpanReplacementType::Slot)
newInlineStyle->addDisplayContents();
if (RefPtr styledElement = dynamicDowncast<StyledElement>(element); styledElement && styledElement->inlineStyle())
newInlineStyle->overrideWithStyle(*styledElement->inlineStyle());
#if ENABLE(DATA_DETECTION)
if (replacementType == SpanReplacementType::DataDetector && newInlineStyle->style())
newInlineStyle->style()->removeProperty(CSSPropertyTextDecorationColor);
#endif
if (shouldAnnotateOrForceInline) {
if (shouldAnnotate())
newInlineStyle->mergeStyleFromRulesForSerialization(downcast<HTMLElement>(*const_cast<Element*>(&element)), m_standardFontFamilySerializationMode);
if (addDisplayInline)
newInlineStyle->forceInline();
if (m_needsPositionStyleConversion) {
m_needRelativeStyleWrapper |= newInlineStyle->convertPositionStyle();
m_needClearingDiv |= newInlineStyle->isFloating();
}
// If the node is not fully selected by the range, then we don't want to keep styles that affect its relationship to the nodes around it
// only the ones that affect it and the nodes within it.
if (rangeFullySelectsNode == DoesNotFullySelectNode && newInlineStyle->style())
newInlineStyle->style()->removeProperty(CSSPropertyFloat);
}
if (!newInlineStyle->isEmpty()) {
out.append(" style=\""_s);
appendAttributeValue(out, newInlineStyle->style()->asText(), documentIsHTML);
out.append('"');
}
}
appendCloseTag(out, element);
}
void StyledMarkupAccumulator::appendEndTag(StringBuilder& out, const Element& element)
{
if (UNLIKELY(spanReplacementForElement(element) != SpanReplacementType::None))
out.append("</span>"_s);
else
MarkupAccumulator::appendEndTag(out, element);
}
RefPtr<Node> StyledMarkupAccumulator::serializeNodes(const Position& start, const Position& end)
{
ASSERT(start <= end);
RefPtr startNode = start.firstNode();
if (!startNode)
return nullptr;
RefPtr pastEnd = end.computeNodeAfterPosition();
if (!pastEnd && end.containerNode())
pastEnd = nextSkippingChildren(*end.protectedContainerNode());
if (!m_highestNodeToBeSerialized)
m_highestNodeToBeSerialized = traverseNodesForSerialization(*startNode, pastEnd.get(), NodeTraversalMode::DoNotEmitString);
if (m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode())
m_wrappingStyle = EditingStyle::wrappingStyleForSerialization(*m_highestNodeToBeSerialized->protectedParentNode(), shouldAnnotate(), m_standardFontFamilySerializationMode);
return traverseNodesForSerialization(*startNode, pastEnd.get(), NodeTraversalMode::EmitString);
}
RefPtr<Node> StyledMarkupAccumulator::traverseNodesForSerialization(Node& startNode, Node* pastEnd, NodeTraversalMode traversalMode)
{
const bool shouldEmit = traversalMode == NodeTraversalMode::EmitString;
UserSelectNoneStateCache userSelectNoneStateCache(m_useComposedTree ? ComposedTree : Tree);
m_inMSOList = false;
unsigned depth = 0;
auto enterNode = [&] (Node& node) {
if (UNLIKELY(m_shouldPreserveMSOList) && shouldEmit) {
if (appendNodeToPreserveMSOList(node))
return false;
}
RefPtr element = dynamicDowncast<Element>(node);
bool isDisplayContents = element && element->hasDisplayContents();
if (!node.renderer() && !isDisplayContents && !enclosingElementWithTag(firstPositionInOrBeforeNode(&node), selectTag))
return false;
if (m_ignoresUserSelectNone && userSelectNoneStateCache.nodeOnlyContainsUserSelectNone(node))
return false;
++depth;
if (shouldEmit)
startAppendingNode(node);
return true;
};
RefPtr<Node> lastClosed;
auto exitNode = [&] (Node& node) {
bool closing = depth;
if (depth)
--depth;
if (shouldEmit) {
if (closing)
endAppendingNode(node);
else
wrapWithNode(node);
}
lastClosed = &node;
};
RefPtr<Node> lastNode;
RefPtr<Node> next;
for (RefPtr n = &startNode; n != pastEnd; lastNode = n, n = next) {
Vector<RefPtr<Node>, 8> exitedAncestors;
next = nullptr;
auto advanceToAncestorSibling = [&]() {
if (auto* sibling = nextSibling(*n)) {
next = sibling;
return;
}
for (RefPtr ancestor = parentNode(*n); ancestor; ancestor = parentNode(*ancestor)) {
exitedAncestors.append(ancestor);
if (RefPtr sibling = nextSibling(*ancestor)) {
next = WTFMove(sibling);
return;
}
}
};
if (RefPtr child = firstChild(*n))
next = WTFMove(child);
else
advanceToAncestorSibling();
ASSERT(next || !pastEnd || n->containsIncludingShadowDOM(pastEnd));
if (isBlock(*n) && canHaveChildrenForEditing(*n) && next == pastEnd) {
// Don't write out empty block containers that aren't fully selected.
continue;
}
bool didEnterNode = false;
if (!enterNode(*n)) {
exitedAncestors.clear();
advanceToAncestorSibling();
} else if (!hasChildNodes(*n))
exitNode(*n);
else
didEnterNode = true;
bool aboutToGoPastEnd = pastEnd && !didEnterNode && (!next || isDescendantOf(*pastEnd, *n));
if (aboutToGoPastEnd)
next = pastEnd;
for (auto& ancestor : exitedAncestors) {
if (!depth && next == pastEnd)
break;
exitNode(*ancestor);
}
}
ASSERT(lastNode || !depth);
if (depth) {
for (RefPtr ancestor = parentNode(pastEnd ? *pastEnd : *lastNode); ancestor && depth; ancestor = parentNode(*ancestor))
exitNode(*ancestor);
}
return lastClosed;
}
bool StyledMarkupAccumulator::appendNodeToPreserveMSOList(Node& node)
{
if (RefPtr commentNode = dynamicDowncast<Comment>(node)) {
if (!m_inMSOList && commentNode->data() == "[if !supportLists]"_s)
m_inMSOList = true;
else if (m_inMSOList && commentNode->data() == "[endif]"_s)
m_inMSOList = false;
else
return false;
startAppendingNode(*commentNode);
return true;
}
if (is<HTMLStyleElement>(node)) {
RefPtr textChild = dynamicDowncast<Text>(node.firstChild());
if (!textChild)
return false;
auto& styleContent = textChild->data();
const auto msoStyleDefinitionsStart = styleContent.find("/* Style Definitions */"_s);
const auto msoListDefinitionsStart = styleContent.find("/* List Definitions */"_s);
const auto lastListItem = styleContent.reverseFind("\n@list"_s);
if (msoListDefinitionsStart == notFound || lastListItem == notFound)
return false;
const auto start = msoStyleDefinitionsStart != notFound && msoStyleDefinitionsStart < msoListDefinitionsStart ? msoStyleDefinitionsStart : msoListDefinitionsStart;
const auto msoListDefinitionsEnd = styleContent.find(";}\n"_s, lastListItem);
if (msoListDefinitionsEnd == notFound || start >= msoListDefinitionsEnd)
return false;
append("<head><style class=\""_s, WebKitMSOListQuirksStyle, "\">\n<!--\n"_s,
StringView(textChild->data()).substring(start, msoListDefinitionsEnd - start + 3),
"\n-->\n</style></head>"_s);
return true;
}
return false;
}
static Node* ancestorToRetainStructureAndAppearanceForBlock(Node* commonAncestorBlock)
{
if (!commonAncestorBlock)
return nullptr;
if (commonAncestorBlock->hasTagName(tbodyTag) || commonAncestorBlock->hasTagName(trTag)) {
ContainerNode* table = commonAncestorBlock->parentNode();
while (table && !is<HTMLTableElement>(*table))
table = table->parentNode();
return table;
}
if (isNonTableCellHTMLBlockElement(commonAncestorBlock))
return commonAncestorBlock;
return nullptr;
}
static inline Node* ancestorToRetainStructureAndAppearance(Node* commonAncestor)
{
return ancestorToRetainStructureAndAppearanceForBlock(enclosingBlock(commonAncestor).get());
}
static bool propertyMissingOrEqualToNone(const StyleProperties* style, CSSPropertyID propertyID)
{
if (!style)
return false;
return style->propertyAsValueID(propertyID).value_or(CSSValueNone) == CSSValueNone;
}
static bool needInterchangeNewlineAfter(const VisiblePosition& v)
{
VisiblePosition next = v.next();
RefPtr upstreamNode = next.deepEquivalent().upstream().deprecatedNode();
RefPtr downstreamNode = v.deepEquivalent().downstream().deprecatedNode();
// Add an interchange newline if a paragraph break is selected and a br won't already be added to the markup to represent it.
return isEndOfParagraph(v) && isStartOfParagraph(next) && !(upstreamNode->hasTagName(brTag) && upstreamNode == downstreamNode);
}
static RefPtr<EditingStyle> styleFromMatchedRulesAndInlineDecl(Node& node)
{
RefPtr element = dynamicDowncast<HTMLElement>(node);
if (!element)
return nullptr;
Ref style = EditingStyle::create(element->inlineStyle());
style->mergeStyleFromRules(*element);
return style;
}
static bool isElementPresentational(const Node& node)
{
return node.hasTagName(uTag) || node.hasTagName(sTag) || node.hasTagName(strikeTag)
|| node.hasTagName(iTag) || node.hasTagName(emTag) || node.hasTagName(bTag) || node.hasTagName(strongTag);
}
static RefPtr<Node> highestAncestorToWrapMarkup(const Position& start, const Position& end, Node& commonAncestor, AnnotateForInterchange annotate)
{
RefPtr<Node> specialCommonAncestor;
if (annotate == AnnotateForInterchange::Yes) {
// Include ancestors that aren't completely inside the range but are required to retain
// the structure and appearance of the copied markup.
specialCommonAncestor = ancestorToRetainStructureAndAppearance(&commonAncestor);
if (auto parentListNode = enclosingNodeOfType(start, isListItem)) {
if (!editingIgnoresContent(*parentListNode) && VisibleSelection::selectionFromContentsOfNode(parentListNode.get()) == VisibleSelection(start, end)) {
specialCommonAncestor = parentListNode->parentNode();
while (specialCommonAncestor && !isListHTMLElement(specialCommonAncestor.get()))
specialCommonAncestor = specialCommonAncestor->parentNode();
}
}
// Retain the Mail quote level by including all ancestor mail block quotes.
if (RefPtr highestMailBlockquote = highestEnclosingNodeOfType(start, isMailBlockquote, CanCrossEditingBoundary))
specialCommonAncestor = WTFMove(highestMailBlockquote);
}
RefPtr checkAncestor = specialCommonAncestor ? specialCommonAncestor : RefPtr { &commonAncestor };
if (checkAncestor->renderer() && checkAncestor->renderer()->containingBlock()) {
RefPtr newSpecialCommonAncestor = highestEnclosingNodeOfType(firstPositionInNode(checkAncestor.get()), &isElementPresentational, CanCrossEditingBoundary, checkAncestor->renderer()->containingBlock()->protectedElement().get());
if (newSpecialCommonAncestor)
specialCommonAncestor = WTFMove(newSpecialCommonAncestor);
}
// If a single tab is selected, commonAncestor will be a text node inside a tab span.
// If two or more tabs are selected, commonAncestor will be the tab span.
// In either case, if there is a specialCommonAncestor already, it will necessarily be above
// any tab span that needs to be included.
if (!specialCommonAncestor && parentTabSpanNode(&commonAncestor))
specialCommonAncestor = commonAncestor.parentNode();
if (!specialCommonAncestor && tabSpanNode(&commonAncestor))
specialCommonAncestor = &commonAncestor;
if (RefPtr enclosingAnchor = enclosingElementWithTag(firstPositionInNode(specialCommonAncestor ? specialCommonAncestor.get() : &commonAncestor), aTag))
specialCommonAncestor = WTFMove(enclosingAnchor);
if (RefPtr enclosingPicture = enclosingElementWithTag(firstPositionInNode(specialCommonAncestor ? specialCommonAncestor.get() : &commonAncestor), pictureTag))
specialCommonAncestor = WTFMove(enclosingPicture);
return specialCommonAncestor;
}
static String serializePreservingVisualAppearanceInternal(const Position& start, const Position& end, Vector<Ref<Node>>* nodes, ResolveURLs resolveURLs, SerializeComposedTree serializeComposedTree, IgnoreUserSelectNone ignoreUserSelectNone,
AnnotateForInterchange annotate, ConvertBlocksToInlines convertBlocksToInlines, StandardFontFamilySerializationMode standardFontFamilySerializationMode, MSOListMode msoListMode, PreserveBaseElement preserveBaseElement)