| /* |
| * Copyright (C) 2004-2017 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 "ComposedTreeIterator.h" |
| #include "CustomHeaderFields.h" |
| #include "DocumentFragment.h" |
| #include "DocumentLoader.h" |
| #include "DocumentType.h" |
| #include "Editing.h" |
| #include "Editor.h" |
| #include "EditorClient.h" |
| #include "ElementIterator.h" |
| #include "EmptyClients.h" |
| #include "File.h" |
| #include "Frame.h" |
| #include "FrameLoader.h" |
| #include "HTMLAttachmentElement.h" |
| #include "HTMLBRElement.h" |
| #include "HTMLBodyElement.h" |
| #include "HTMLDivElement.h" |
| #include "HTMLHeadElement.h" |
| #include "HTMLHtmlElement.h" |
| #include "HTMLImageElement.h" |
| #include "HTMLNames.h" |
| #include "HTMLStyleElement.h" |
| #include "HTMLTableElement.h" |
| #include "HTMLTextAreaElement.h" |
| #include "HTMLTextFormControlElement.h" |
| #include "LibWebRTCProvider.h" |
| #include "MarkupAccumulator.h" |
| #include "NodeList.h" |
| #include "Page.h" |
| #include "PageConfiguration.h" |
| #include "PasteboardItemInfo.h" |
| #include "Range.h" |
| #include "RenderBlock.h" |
| #include "RuntimeEnabledFeatures.h" |
| #include "Settings.h" |
| #include "SocketProvider.h" |
| #include "StyleProperties.h" |
| #include "TextIterator.h" |
| #include "TypedElementDescendantIterator.h" |
| #include "VisibleSelection.h" |
| #include "VisibleUnits.h" |
| #include <wtf/StdLibExtras.h> |
| #include <wtf/URL.h> |
| #include <wtf/URLParser.h> |
| #include <wtf/text/StringBuilder.h> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| static bool propertyMissingOrEqualToNone(StyleProperties*, CSSPropertyID); |
| |
| class AttributeChange { |
| public: |
| AttributeChange() |
| : m_name(nullAtom(), nullAtom(), nullAtom()) |
| { |
| } |
| |
| AttributeChange(Element* element, const QualifiedName& name, const String& value) |
| : m_element(element), m_name(name), m_value(value) |
| { |
| } |
| |
| void apply() |
| { |
| m_element->setAttribute(m_name, m_value); |
| } |
| |
| private: |
| RefPtr<Element> m_element; |
| QualifiedName m_name; |
| String m_value; |
| }; |
| |
| static void completeURLs(DocumentFragment* fragment, const String& baseURL) |
| { |
| Vector<AttributeChange> changes; |
| |
| URL parsedBaseURL({ }, baseURL); |
| |
| for (auto& 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, attribute.name(), element.completeURLsInAttributeValue(parsedBaseURL, attribute))); |
| } |
| } |
| |
| for (auto& change : changes) |
| change.apply(); |
| } |
| |
| void replaceSubresourceURLs(Ref<DocumentFragment>&& fragment, HashMap<AtomString, AtomString>&& replacementMap) |
| { |
| Vector<AttributeChange> changes; |
| for (auto& 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, attribute.name(), replacement }); |
| } |
| } |
| } |
| for (auto& change : changes) |
| change.apply(); |
| } |
| |
| struct ElementAttribute { |
| Ref<Element> element; |
| QualifiedName attributeName; |
| }; |
| |
| void removeSubresourceURLAttributes(Ref<DocumentFragment>&& fragment, WTF::Function<bool(const URL&)> shouldRemoveURL) |
| { |
| Vector<ElementAttribute> attributesToRemove; |
| for (auto& 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()) { |
| URL url({ }, attribute.value()); |
| if (shouldRemoveURL(url)) |
| attributesToRemove.append({ element, attribute.name() }); |
| } |
| } |
| } |
| for (auto& item : attributesToRemove) |
| item.element->removeAttribute(item.attributeName); |
| } |
| |
| std::unique_ptr<Page> createPageForSanitizingWebContent() |
| { |
| auto pageConfiguration = pageConfigurationWithEmptyClients(PAL::SessionID::defaultSessionID()); |
| |
| auto page = makeUnique<Page>(WTFMove(pageConfiguration)); |
| page->setIsForSanitizingWebContent(); |
| page->settings().setMediaEnabled(false); |
| page->settings().setScriptEnabled(false); |
| page->settings().setPluginsEnabled(false); |
| page->settings().setAcceleratedCompositingEnabled(false); |
| |
| Frame& frame = page->mainFrame(); |
| frame.setView(FrameView::create(frame, IntSize { 800, 600 })); |
| frame.init(); |
| |
| FrameLoader& loader = frame.loader(); |
| static char markup[] = "<!DOCTYPE html><html><body></body></html>"; |
| ASSERT(loader.activeDocumentLoader()); |
| auto& writer = loader.activeDocumentLoader()->writer(); |
| writer.setMIMEType("text/html"); |
| writer.begin(); |
| writer.insertDataSynchronously(String(markup)); |
| writer.end(); |
| RELEASE_ASSERT(page->mainFrame().document()->body()); |
| |
| return page; |
| } |
| |
| String sanitizeMarkup(const String& rawHTML, MSOListQuirks msoListQuirks, Optional<WTF::Function<void(DocumentFragment&)>> fragmentSanitizer) |
| { |
| auto page = createPageForSanitizingWebContent(); |
| Document* stagingDocument = page->mainFrame().document(); |
| ASSERT(stagingDocument); |
| |
| auto fragment = createFragmentFromMarkup(*stagingDocument, rawHTML, emptyString(), DisallowScriptingAndPluginContent); |
| |
| if (fragmentSanitizer) |
| (*fragmentSanitizer)(fragment); |
| |
| return sanitizedMarkupForFragmentInDocument(WTFMove(fragment), *stagingDocument, msoListQuirks, rawHTML); |
| } |
| |
| enum class MSOListMode { Preserve, DoNotPreserve }; |
| class StyledMarkupAccumulator final : public MarkupAccumulator { |
| public: |
| enum RangeFullySelectsNode { DoesFullySelectNode, DoesNotFullySelectNode }; |
| |
| StyledMarkupAccumulator(const Position& start, const Position& end, Vector<Node*>* nodes, ResolveURLs, SerializeComposedTree, |
| AnnotateForInterchange, StandardFontFamilySerializationMode, MSOListMode, bool needsPositionStyleConversion, Node* highestNodeToBeSerialized = nullptr); |
| |
| 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::appendString; |
| |
| ContainerNode* parentNode(Node& node) |
| { |
| if (UNLIKELY(m_useComposedTree)) |
| return node.parentInComposedTree(); |
| return node.parentOrShadowHostNode(); |
| } |
| |
| private: |
| 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&); |
| |
| 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 }; |
| 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_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<Node*>* nodes, ResolveURLs urlsToResolve, SerializeComposedTree serializeComposedTree, |
| AnnotateForInterchange annotate, StandardFontFamilySerializationMode standardFontFamilySerializationMode, MSOListMode msoListMode, bool needsPositionStyleConversion, Node* highestNodeToBeSerialized) |
| : MarkupAccumulator(nodes, urlsToResolve) |
| , m_start(start) |
| , m_end(end) |
| , m_annotate(annotate) |
| , m_highestNodeToBeSerialized(highestNodeToBeSerialized) |
| , m_useComposedTree(serializeComposedTree == SerializeComposedTree::Yes) |
| , m_needsPositionStyleConversion(needsPositionStyleConversion) |
| , m_standardFontFamilySerializationMode(standardFontFamilySerializationMode) |
| , m_shouldPreserveMSOList(msoListMode == MSOListMode::Preserve) |
| { |
| } |
| |
| void StyledMarkupAccumulator::wrapWithNode(Node& node, bool convertBlocksToInlines, RangeFullySelectsNode rangeFullySelectsNode) |
| { |
| StringBuilder markup; |
| if (is<Element>(node)) |
| appendStartTag(markup, downcast<Element>(node), 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()); |
| appendString(styleNodeCloseTag(isBlock)); |
| } |
| |
| void StyledMarkupAccumulator::appendStyleNodeOpenTag(StringBuilder& out, StyleProperties* style, Document& document, bool isBlock) |
| { |
| // wrappingStyleForSerialization should have removed -webkit-text-decorations-in-effect |
| ASSERT(propertyMissingOrEqualToNone(style, CSSPropertyWebkitTextDecorationsInEffect)); |
| if (isBlock) |
| out.appendLiteral("<div style=\""); |
| else |
| out.appendLiteral("<span style=\""); |
| appendAttributeValue(out, style->asText(), document.isHTMLDocument()); |
| out.appendLiteral("\">"); |
| } |
| |
| 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; |
| } |
| |
| String StyledMarkupAccumulator::takeResults() |
| { |
| StringBuilder result; |
| result.reserveCapacity(totalLength(m_reversedPrecedingMarkup) + length()); |
| |
| for (size_t i = m_reversedPrecedingMarkup.size(); i > 0; --i) |
| result.append(m_reversedPrecedingMarkup[i - 1]); |
| |
| concatenateMarkup(result); |
| |
| // We remove '\0' characters because they are not visibly rendered to the user. |
| return result.toString().replaceWithLiteral('\0', ""); |
| } |
| |
| void StyledMarkupAccumulator::appendText(StringBuilder& out, const Text& text) |
| { |
| const bool parentIsTextarea = is<HTMLTextAreaElement>(text.parentElement()); |
| const bool wrappingSpan = shouldApplyWrappingStyle(text) && !parentIsTextarea; |
| if (wrappingSpan) { |
| RefPtr<EditingStyle> 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.document()); |
| } |
| |
| 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) |
| { |
| TextIteratorBehavior behavior = TextIteratorDefaultBehavior; |
| 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()) |
| behavior = TextIteratorBehavesAsIfNodesFollowing; |
| } |
| |
| return plainText(Range::create(text.document(), start, end).ptr(), behavior); |
| } |
| |
| 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 (!RuntimeEnabledFeatures::sharedFeatures().attachmentElementEnabled()) |
| return; |
| |
| if (is<HTMLAttachmentElement>(element)) { |
| auto& attachment = downcast<HTMLAttachmentElement>(element); |
| appendAttribute(out, element, { webkitattachmentidAttr, attachment.uniqueIdentifier() }, namespaces); |
| if (auto* 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, file->path() }, namespaces); |
| appendAttribute(out, element, { webkitattachmentbloburlAttr, file->url().string() }, namespaces); |
| } |
| } else if (is<HTMLImageElement>(element)) { |
| if (auto attachment = downcast<HTMLImageElement>(element).attachmentElement()) |
| appendAttribute(out, element, { webkitattachmentidAttr, 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:") || style.contains(";mso-list:") || style.contains("\nmso-list:"); |
| } |
| return false; |
| } |
| |
| void StyledMarkupAccumulator::appendStartTag(StringBuilder& out, const Element& element, bool addDisplayInline, RangeFullySelectsNode rangeFullySelectsNode) |
| { |
| const bool documentIsHTML = element.document().isHTMLDocument(); |
| const bool isSlotElement = is<HTMLSlotElement>(element); |
| if (UNLIKELY(isSlotElement)) |
| out.append("<span"); |
| else |
| appendOpenTag(out, element, nullptr); |
| |
| appendCustomAttributes(out, element, nullptr); |
| |
| const bool shouldAnnotateOrForceInline = element.isHTMLElement() && (shouldAnnotate() || addDisplayInline); |
| bool shouldOverrideStyleAttr = (shouldAnnotateOrForceInline || shouldApplyWrappingStyle(element) || isSlotElement) && !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.isJavaScriptURLAttribute(attribute)) |
| continue; |
| 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 (isSlotElement) |
| newInlineStyle->addDisplayContents(); |
| |
| if (is<StyledElement>(element) && downcast<StyledElement>(element).inlineStyle()) |
| newInlineStyle->overrideWithStyle(*downcast<StyledElement>(element).inlineStyle()); |
| |
| 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.appendLiteral(" style=\""); |
| appendAttributeValue(out, newInlineStyle->style()->asText(), documentIsHTML); |
| out.append('\"'); |
| } |
| } |
| |
| appendCloseTag(out, element); |
| } |
| |
| void StyledMarkupAccumulator::appendEndTag(StringBuilder& out, const Element& element) |
| { |
| if (UNLIKELY(is<HTMLSlotElement>(element))) |
| out.append("</span>"); |
| else |
| MarkupAccumulator::appendEndTag(out, element); |
| } |
| |
| Node* StyledMarkupAccumulator::serializeNodes(const Position& start, const Position& end) |
| { |
| ASSERT(comparePositions(start, end) <= 0); |
| auto startNode = start.firstNode(); |
| Node* pastEnd = end.computeNodeAfterPosition(); |
| if (!pastEnd && end.containerNode()) |
| pastEnd = nextSkippingChildren(*end.containerNode()); |
| |
| if (!m_highestNodeToBeSerialized) { |
| Node* lastClosed = traverseNodesForSerialization(startNode.get(), pastEnd, NodeTraversalMode::DoNotEmitString); |
| m_highestNodeToBeSerialized = lastClosed; |
| } |
| |
| if (m_highestNodeToBeSerialized && m_highestNodeToBeSerialized->parentNode()) |
| m_wrappingStyle = EditingStyle::wrappingStyleForSerialization(*m_highestNodeToBeSerialized->parentNode(), shouldAnnotate(), m_standardFontFamilySerializationMode); |
| |
| return traverseNodesForSerialization(startNode.get(), pastEnd, NodeTraversalMode::EmitString); |
| } |
| |
| Node* StyledMarkupAccumulator::traverseNodesForSerialization(Node* startNode, Node* pastEnd, NodeTraversalMode traversalMode) |
| { |
| const bool shouldEmit = traversalMode == NodeTraversalMode::EmitString; |
| |
| m_inMSOList = false; |
| |
| unsigned depth = 0; |
| auto enterNode = [&] (Node& node) { |
| if (UNLIKELY(m_shouldPreserveMSOList) && shouldEmit) { |
| if (appendNodeToPreserveMSOList(node)) |
| return false; |
| } |
| |
| bool isDisplayContents = is<Element>(node) && downcast<Element>(node).hasDisplayContents(); |
| if (!node.renderer() && !isDisplayContents && !enclosingElementWithTag(firstPositionInOrBeforeNode(&node), selectTag)) |
| return false; |
| |
| ++depth; |
| if (shouldEmit) |
| startAppendingNode(node); |
| |
| return true; |
| }; |
| |
| Node* lastClosed = nullptr; |
| auto exitNode = [&] (Node& node) { |
| bool closing = depth; |
| if (depth) |
| --depth; |
| if (shouldEmit) { |
| if (closing) |
| endAppendingNode(node); |
| else |
| wrapWithNode(node); |
| } |
| lastClosed = &node; |
| }; |
| |
| Node* lastNode = nullptr; |
| Node* next = nullptr; |
| for (auto* n = startNode; n != pastEnd; lastNode = n, n = next) { |
| |
| Vector<Node*, 8> exitedAncestors; |
| next = nullptr; |
| if (auto* child = firstChild(*n)) |
| next = child; |
| else if (auto* sibling = nextSibling(*n)) |
| next = sibling; |
| else { |
| for (auto* ancestor = parentNode(*n); ancestor; ancestor = parentNode(*ancestor)) { |
| exitedAncestors.append(ancestor); |
| if (auto* sibling = nextSibling(*ancestor)) { |
| next = sibling; |
| break; |
| } |
| } |
| } |
| ASSERT(next || !pastEnd); |
| |
| if (isBlock(n) && canHaveChildrenForEditing(*n) && next == pastEnd) { |
| // Don't write out empty block containers that aren't fully selected. |
| continue; |
| } |
| |
| if (!enterNode(*n)) { |
| next = nextSkippingChildren(*n); |
| // Don't skip over pastEnd. |
| if (pastEnd && isDescendantOf(*pastEnd, *n)) |
| next = pastEnd; |
| ASSERT(next || !pastEnd); |
| } else { |
| if (!hasChildNodes(*n)) |
| exitNode(*n); |
| } |
| |
| for (auto* ancestor : exitedAncestors) { |
| if (!depth && next == pastEnd) |
| break; |
| exitNode(*ancestor); |
| } |
| } |
| |
| ASSERT(lastNode || !depth); |
| if (depth) { |
| for (auto* ancestor = parentNode(pastEnd ? *pastEnd : *lastNode); ancestor && depth; ancestor = parentNode(*ancestor)) |
| exitNode(*ancestor); |
| } |
| |
| return lastClosed; |
| } |
| |
| bool StyledMarkupAccumulator::appendNodeToPreserveMSOList(Node& node) |
| { |
| if (is<Comment>(node)) { |
| auto& commentNode = downcast<Comment>(node); |
| if (!m_inMSOList && commentNode.data() == "[if !supportLists]") |
| m_inMSOList = true; |
| else if (m_inMSOList && commentNode.data() == "[endif]") |
| m_inMSOList = false; |
| else |
| return false; |
| startAppendingNode(commentNode); |
| return true; |
| } |
| if (is<HTMLStyleElement>(node)) { |
| auto* firstChild = node.firstChild(); |
| if (!is<Text>(firstChild)) |
| return false; |
| |
| auto& textChild = downcast<Text>(*firstChild); |
| auto& styleContent = textChild.data(); |
| |
| const auto msoStyleDefinitionsStart = styleContent.find("/* Style Definitions */"); |
| const auto msoListDefinitionsStart = styleContent.find("/* List Definitions */"); |
| const auto lastListItem = styleContent.reverseFind("\n@list"); |
| if (msoListDefinitionsStart == notFound || lastListItem == notFound) |
| return false; |
| const auto start = msoStyleDefinitionsStart != notFound && msoStyleDefinitionsStart < msoListDefinitionsStart ? msoStyleDefinitionsStart : msoListDefinitionsStart; |
| |
| const auto msoListDefinitionsEnd = styleContent.find(";}\n", lastListItem); |
| if (msoListDefinitionsEnd == notFound || start >= msoListDefinitionsEnd) |
| return false; |
| |
| appendString("<head><style class=\"" WebKitMSOListQuirksStyle "\">\n<!--\n"); |
| appendStringView(StringView(textChild.data()).substring(start, msoListDefinitionsEnd - start + 3)); |
| appendString("\n-->\n</style></head>"); |
| |
| 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)); |
| } |
| |
| static bool propertyMissingOrEqualToNone(StyleProperties* style, CSSPropertyID propertyID) |
| { |
| if (!style) |
| return false; |
| RefPtr<CSSValue> value = style->getPropertyCSSValue(propertyID); |
| if (!value) |
| return true; |
| if (!is<CSSPrimitiveValue>(*value)) |
| return false; |
| return downcast<CSSPrimitiveValue>(*value).valueID() == CSSValueNone; |
| } |
| |
| static bool needInterchangeNewlineAfter(const VisiblePosition& v) |
| { |
| VisiblePosition next = v.next(); |
| Node* upstreamNode = next.deepEquivalent().upstream().deprecatedNode(); |
| Node* 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) |
| { |
| if (!is<HTMLElement>(node)) |
| return nullptr; |
| |
| auto& element = downcast<HTMLElement>(node); |
| auto 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 Node* highestAncestorToWrapMarkup(const Position& start, const Position& end, Node& commonAncestor, AnnotateForInterchange annotate) |
| { |
| Node* specialCommonAncestor = nullptr; |
| 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) == VisibleSelection(start, end)) { |
| specialCommonAncestor = parentListNode->parentNode(); |
| while (specialCommonAncestor && !isListHTMLElement(specialCommonAncestor)) |
| specialCommonAncestor = specialCommonAncestor->parentNode(); |
| } |
| } |
| |
| // Retain the Mail quote level by including all ancestor mail block quotes. |
| if (Node* highestMailBlockquote = highestEnclosingNodeOfType(start, isMailBlockquote, CanCrossEditingBoundary)) |
| specialCommonAncestor = highestMailBlockquote; |
| } |
| |
| auto* checkAncestor = specialCommonAncestor ? specialCommonAncestor : &commonAncestor; |
| if (checkAncestor->renderer() && checkAncestor->renderer()->containingBlock()) { |
| Node* newSpecialCommonAncestor = highestEnclosingNodeOfType(firstPositionInNode(checkAncestor), &isElementPresentational, CanCrossEditingBoundary, checkAncestor->renderer()->containingBlock()->element()); |
| if (newSpecialCommonAncestor) |
| specialCommonAncestor = 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 && isTabSpanTextNode(&commonAncestor)) |
| specialCommonAncestor = commonAncestor.parentNode(); |
| if (!specialCommonAncestor && isTabSpanNode(&commonAncestor)) |
| specialCommonAncestor = &commonAncestor; |
| |
| if (auto* enclosingAnchor = enclosingElementWithTag(firstPositionInNode(specialCommonAncestor ? specialCommonAncestor : &commonAncestor), aTag)) |
| specialCommonAncestor = enclosingAnchor; |
| |
| return specialCommonAncestor; |
| } |
| |
| static String serializePreservingVisualAppearanceInternal(const Position& start, const Position& end, Vector<Node*>* nodes, ResolveURLs urlsToResolve, SerializeComposedTree serializeComposedTree, |
| AnnotateForInterchange annotate, ConvertBlocksToInlines convertBlocksToInlines, StandardFontFamilySerializationMode standardFontFamilySerializationMode, MSOListMode msoListMode) |
| { |
| static NeverDestroyed<const String> interchangeNewlineString(MAKE_STATIC_STRING_IMPL("<br class=\"" AppleInterchangeNewline "\">")); |
| |
| if (!comparePositions(start, end)) |
| return emptyString(); |
| |
| RefPtr<Node> commonAncestor = commonShadowIncludingAncestor(start, end); |
| if (!commonAncestor) |
| return emptyString(); |
| |
| auto& document = *start.document(); |
| document.updateLayoutIgnorePendingStylesheets(); |
| |
| VisiblePosition visibleStart { start }; |
| VisiblePosition visibleEnd { end }; |
| |
| auto body = makeRefPtr(enclosingElementWithTag(firstPositionInNode(commonAncestor.get()), bodyTag)); |
| RefPtr<Element> fullySelectedRoot; |
| // FIXME: Do this for all fully selected blocks, not just the body. |
| if (body && VisiblePosition(firstPositionInNode(body.get())) == visibleStart && VisiblePosition(lastPositionInNode(body.get())) == visibleEnd) |
| fullySelectedRoot = body; |
| bool needsPositionStyleConversion = body && fullySelectedRoot == body && document.settings().shouldConvertPositionStyleOnCopy(); |
| |
| Node* specialCommonAncestor = highestAncestorToWrapMarkup(start, end, *commonAncestor, annotate); |
| |
| StyledMarkupAccumulator accumulator(start, end, nodes, urlsToResolve, serializeComposedTree, annotate, standardFontFamilySerializationMode, msoListMode, needsPositionStyleConversion, specialCommonAncestor); |
| |
| Position startAdjustedForInterchangeNewline = start; |
| if (annotate == AnnotateForInterchange::Yes && needInterchangeNewlineAfter(visibleStart)) { |
| if (visibleStart == visibleEnd.previous()) |
| return interchangeNewlineString; |
| |
| accumulator.appendString(interchangeNewlineString); |
| startAdjustedForInterchangeNewline = visibleStart.next().deepEquivalent(); |
| |
| if (comparePositions(startAdjustedForInterchangeNewline, end) >= 0) |
| return interchangeNewlineString; |
| } |
| |
| Node* lastClosed = accumulator.serializeNodes(startAdjustedForInterchangeNewline, end); |
| |
| if (specialCommonAncestor && lastClosed) { |
| // Also include all of the ancestors of lastClosed up to this special ancestor. |
| for (ContainerNode* ancestor = accumulator.parentNode(*lastClosed); ancestor; ancestor = accumulator.parentNode(*ancestor)) { |
| if (ancestor == fullySelectedRoot && convertBlocksToInlines == ConvertBlocksToInlines::No) { |
| RefPtr<EditingStyle> fullySelectedRootStyle = styleFromMatchedRulesAndInlineDecl(*fullySelectedRoot); |
| |
| // Bring the background attribute over, but not as an attribute because a background attribute on a div |
| // appears to have no effect. |
| if ((!fullySelectedRootStyle || !fullySelectedRootStyle->style() || !fullySelectedRootStyle->style()->getPropertyCSSValue(CSSPropertyBackgroundImage)) |
| && fullySelectedRoot->hasAttributeWithoutSynchronization(backgroundAttr)) |
| fullySelectedRootStyle->style()->setProperty(CSSPropertyBackgroundImage, "url('" + fullySelectedRoot->getAttribute(backgroundAttr) + "')"); |
| |
| if (fullySelectedRootStyle->style()) { |
| // Reset the CSS properties to avoid an assertion error in addStyleMarkup(). |
| // This assertion is caused at least when we select all text of a <body> element whose |
| // 'text-decoration' property is "inherit", and copy it. |
| if (!propertyMissingOrEqualToNone(fullySelectedRootStyle->style(), CSSPropertyTextDecoration)) |
| fullySelectedRootStyle->style()->setProperty(CSSPropertyTextDecoration, CSSValueNone); |
| if (!propertyMissingOrEqualToNone(fullySelectedRootStyle->style(), CSSPropertyWebkitTextDecorationsInEffect)) |
| fullySelectedRootStyle->style()->setProperty(CSSPropertyWebkitTextDecorationsInEffect, CSSValueNone); |
| accumulator.wrapWithStyleNode(fullySelectedRootStyle->style(), document, true); |
| } |
| } else { |
| // Since this node and all the other ancestors are not in the selection we want to set RangeFullySelectsNode to DoesNotFullySelectNode |
| // so that styles that affect the exterior of the node are not included. |
| accumulator.wrapWithNode(*ancestor, convertBlocksToInlines == ConvertBlocksToInlines::Yes, StyledMarkupAccumulator::DoesNotFullySelectNode); |
| } |
| if (nodes) |
| nodes->append(ancestor); |
| |
| if (ancestor == specialCommonAncestor) |
| break; |
| } |
| } |
| |
| if (accumulator.needRelativeStyleWrapper() && needsPositionStyleConversion) { |
| if (accumulator.needClearingDiv()) |
| accumulator.appendString("<div style=\"clear: both;\"></div>"); |
| RefPtr<EditingStyle> positionRelativeStyle = styleFromMatchedRulesAndInlineDecl(*body); |
| positionRelativeStyle->style()->setProperty(CSSPropertyPosition, CSSValueRelative); |
| accumulator.wrapWithStyleNode(positionRelativeStyle->style(), document, true); |
| } |
| |
| // FIXME: The interchange newline should be placed in the block that it's in, not after all of the content, unconditionally. |
| if (annotate == AnnotateForInterchange::Yes && needInterchangeNewlineAfter(visibleEnd.previous())) |
| accumulator.appendString(interchangeNewlineString); |
| |
| return accumulator.takeResults(); |
| } |
| |
| String serializePreservingVisualAppearance(const Range& range, Vector<Node*>* nodes, AnnotateForInterchange annotate, ConvertBlocksToInlines convertBlocksToInlines, ResolveURLs urlsToReslve) |
| { |
| return serializePreservingVisualAppearanceInternal(range.startPosition(), range.endPosition(), nodes, urlsToReslve, SerializeComposedTree::No, |
| annotate, convertBlocksToInlines, StandardFontFamilySerializationMode::Keep, MSOListMode::DoNotPreserve); |
| } |
| |
| String serializePreservingVisualAppearance(const VisibleSelection& selection, ResolveURLs resolveURLs, SerializeComposedTree serializeComposedTree, Vector<Node*>* nodes) |
| { |
| return serializePreservingVisualAppearanceInternal(selection.start(), selection.end(), nodes, resolveURLs, serializeComposedTree, |
| AnnotateForInterchange::Yes, ConvertBlocksToInlines::No, StandardFontFamilySerializationMode::Keep, MSOListMode::DoNotPreserve); |
| } |
| |
| |
| static bool shouldPreserveMSOLists(const String& markup) |
| { |
| if (!markup.startsWith("<html xmlns:")) |
| return false; |
| auto tagClose = markup.find('>'); |
| if (tagClose == notFound) |
| return false; |
| auto htmlTag = markup.substring(0, tagClose); |
| return htmlTag.contains("xmlns:o=\"urn:schemas-microsoft-com:office:office\"") |
| && htmlTag.contains("xmlns:w=\"urn:schemas-microsoft-com:office:word\""); |
| } |
| |
| String sanitizedMarkupForFragmentInDocument(Ref<DocumentFragment>&& fragment, Document& document, MSOListQuirks msoListQuirks, const String& originalMarkup) |
| { |
| MSOListMode msoListMode = msoListQuirks == MSOListQuirks::CheckIfNeeded && shouldPreserveMSOLists(originalMarkup) |
| ? MSOListMode::Preserve : MSOListMode::DoNotPreserve; |
| |
| auto bodyElement = makeRefPtr(document.body()); |
| ASSERT(bodyElement); |
| bodyElement->appendChild(fragment.get()); |
| |
| // SerializeComposedTree::No because there can't be a shadow tree in the pasted fragment. |
| auto result = serializePreservingVisualAppearanceInternal(firstPositionInNode(bodyElement.get()), lastPositionInNode(bodyElement.get()), nullptr, |
| ResolveURLs::YesExcludingLocalFileURLsForPrivacy, SerializeComposedTree::No, AnnotateForInterchange::Yes, ConvertBlocksToInlines::No, StandardFontFamilySerializationMode::Strip, msoListMode); |
| |
| if (msoListMode == MSOListMode::Preserve) { |
| StringBuilder builder; |
| builder.appendLiteral("<html xmlns:o=\"urn:schemas-microsoft-com:office:office\"\n" |
| "xmlns:w=\"urn:schemas-microsoft-com:office:word\"\n" |
| "xmlns:m=\"http://schemas.microsoft.com/office/2004/12/omml\"\n" |
| "xmlns=\"http://www.w3.org/TR/REC-html40\">"); |
| builder.append(result); |
| builder.appendLiteral("</html>"); |
| return builder.toString(); |
| } |
| |
| return result; |
| } |
| |
| static void restoreAttachmentElementsInFragment(DocumentFragment& fragment) |
| { |
| #if ENABLE(ATTACHMENT_ELEMENT) |
| if (!RuntimeEnabledFeatures::sharedFeatures().attachmentElementEnabled()) |
| return; |
| |
| // When creating a fragment we must strip the webkit-attachment-path attribute after restoring the File object. |
| Vector<Ref<HTMLAttachmentElement>> attachments; |
| for (auto& attachment : descendantsOfType<HTMLAttachmentElement>(fragment)) |
| attachments.append(attachment); |
| |
| for (auto& attachment : attachments) { |
| attachment->setUniqueIdentifier(attachment->attributeWithoutSynchronization(webkitattachmentidAttr)); |
| |
| auto attachmentPath = attachment->attachmentPath(); |
| auto blobURL = attachment->blobURL(); |
| if (!attachmentPath.isEmpty()) |
| attachment->setFile(File::create(attachmentPath)); |
| else if (!blobURL.isEmpty()) |
| attachment->setFile(File::deserialize({ }, blobURL, attachment->attachmentType(), attachment->attachmentTitle())); |
| |
| // Remove temporary attributes that were previously added in StyledMarkupAccumulator::appendCustomAttributes. |
| attachment->removeAttribute(webkitattachmentidAttr); |
| attachment->removeAttribute(webkitattachmentpathAttr); |
| attachment->removeAttribute(webkitattachmentbloburlAttr); |
| } |
| |
| Vector<Ref<HTMLImageElement>> images; |
| for (auto& image : descendantsOfType<HTMLImageElement>(fragment)) |
| images.append(image); |
| |
| for (auto& image : images) { |
| auto attachmentIdentifier = image->attributeWithoutSynchronization(webkitattachmentidAttr); |
| if (attachmentIdentifier.isEmpty()) |
| continue; |
| |
| auto attachment = HTMLAttachmentElement::create(HTMLNames::attachmentTag, *fragment.ownerDocument()); |
| attachment->setUniqueIdentifier(attachmentIdentifier); |
| image->setAttachmentElement(WTFMove(attachment)); |
| image->removeAttribute(webkitattachmentidAttr); |
| } |
| #else |
| UNUSED_PARAM(fragment); |
| #endif |
| } |
| |
| Ref<DocumentFragment> createFragmentFromMarkup(Document& document, const String& markup, const String& baseURL, ParserContentPolicy parserContentPolicy) |
| { |
| // We use a fake body element here to trick the HTML parser into using the InBody insertion mode. |
| auto fakeBody = HTMLBodyElement::create(document); |
| auto fragment = DocumentFragment::create(document); |
| |
| fragment->parseHTML(markup, fakeBody.ptr(), parserContentPolicy); |
| restoreAttachmentElementsInFragment(fragment); |
| if (!baseURL.isEmpty() && baseURL != WTF::blankURL() && baseURL != document.baseURL()) |
| completeURLs(fragment.ptr(), baseURL); |
| |
| return fragment; |
| } |
| |
| String serializeFragment(const Node& node, SerializedNodes root, Vector<Node*>* nodes, ResolveURLs urlsToResolve, Vector<QualifiedName>* tagNamesToSkip, SerializationSyntax serializationSyntax) |
| { |
| MarkupAccumulator accumulator(nodes, urlsToResolve, serializationSyntax); |
| return accumulator.serializeNodes(const_cast<Node&>(node), root, tagNamesToSkip); |
| } |
| |
| static void fillContainerFromString(ContainerNode& paragraph, const String& string) |
| { |
| Document& document = paragraph.document(); |
| |
| if (string.isEmpty()) { |
| paragraph.appendChild(createBlockPlaceholderElement(document)); |
| return; |
| } |
| |
| ASSERT(string.find('\n') == notFound); |
| |
| Vector<String> tabList = string.splitAllowingEmptyEntries('\t'); |
| String tabText = emptyString(); |
| bool first = true; |
| size_t numEntries = tabList.size(); |
| for (size_t i = 0; i < numEntries; ++i) { |
| const String& s = tabList[i]; |
| |
| // append the non-tab textual part |
| if (!s.isEmpty()) { |
| if (!tabText.isEmpty()) { |
| paragraph.appendChild(createTabSpanElement(document, tabText)); |
| tabText = emptyString(); |
| } |
| Ref<Node> textNode = document.createTextNode(stringWithRebalancedWhitespace(s, first, i + 1 == numEntries)); |
| paragraph.appendChild(textNode); |
| } |
| |
| // there is a tab after every entry, except the last entry |
| // (if the last character is a tab, the list gets an extra empty entry) |
| if (i + 1 != numEntries) |
| tabText.append('\t'); |
| else if (!tabText.isEmpty()) |
| paragraph.appendChild(createTabSpanElement(document, tabText)); |
| |
| first = false; |
| } |
| } |
| |
| bool isPlainTextMarkup(Node* node) |
| { |
| ASSERT(node); |
| if (!is<HTMLDivElement>(*node)) |
| return false; |
| |
| HTMLDivElement& element = downcast<HTMLDivElement>(*node); |
| if (element.hasAttributes()) |
| return false; |
| |
| Node* firstChild = element.firstChild(); |
| if (!firstChild) |
| return false; |
| |
| Node* secondChild = firstChild->nextSibling(); |
| if (!secondChild) |
| return firstChild->isTextNode() || firstChild->firstChild(); |
| |
| if (secondChild->nextSibling()) |
| return false; |
| |
| return isTabSpanTextNode(firstChild->firstChild()) && secondChild->isTextNode(); |
| } |
| |
| static bool contextPreservesNewline(const Range& context) |
| { |
| VisiblePosition position(context.startPosition()); |
| Node* container = position.deepEquivalent().containerNode(); |
| if (!container || !container->renderer()) |
| return false; |
| |
| return container->renderer()->style().preserveNewline(); |
| } |
| |
| Ref<DocumentFragment> createFragmentFromText(Range& context, const String& text) |
| { |
| Document& document = context.ownerDocument(); |
| Ref<DocumentFragment> fragment = document.createDocumentFragment(); |
| |
| if (text.isEmpty()) |
| return fragment; |
| |
| String string = text; |
| string.replace("\r\n", "\n"); |
| string.replace('\r', '\n'); |
| |
| auto createHTMLBRElement = [&document]() { |
| auto element = HTMLBRElement::create(document); |
| element->setAttributeWithoutSynchronization(classAttr, AppleInterchangeNewline); |
| return element; |
| }; |
| |
| if (contextPreservesNewline(context)) { |
| fragment->appendChild(document.createTextNode(string)); |
| if (string.endsWith('\n')) { |
| fragment->appendChild(createHTMLBRElement()); |
| } |
| return fragment; |
| } |
| |
| // A string with no newlines gets added inline, rather than being put into a paragraph. |
| if (string.find('\n') == notFound) { |
| fillContainerFromString(fragment, string); |
| return fragment; |
| } |
| |
| if (string.length() == 1 && string[0] == '\n') { |
| // This is a single newline char, thus just create one HTMLBRElement. |
| fragment->appendChild(createHTMLBRElement()); |
| return fragment; |
| } |
| |
| // Break string into paragraphs. Extra line breaks turn into empty paragraphs. |
| Node* blockNode = enclosingBlock(context.firstNode()); |
| Element* block = downcast<Element>(blockNode); |
| bool useClonesOfEnclosingBlock = blockNode |
| && blockNode->isElementNode() |
| && !block->hasTagName(bodyTag) |
| && !block->hasTagName(htmlTag) |
| && block != editableRootForPosition(context.startPosition()); |
| bool useLineBreak = enclosingTextFormControl(context.startPosition()); |
| |
| Vector<String> list = string.splitAllowingEmptyEntries('\n'); |
| size_t numLines = list.size(); |
| for (size_t i = 0; i < numLines; ++i) { |
| const String& s = list[i]; |
| |
| RefPtr<Element> element; |
| if (s.isEmpty() && i + 1 == numLines) { |
| // For last line, use the "magic BR" rather than a P. |
| element = createHTMLBRElement(); |
| } else if (useLineBreak) { |
| element = HTMLBRElement::create(document); |
| fillContainerFromString(fragment, s); |
| } else { |
| if (useClonesOfEnclosingBlock) |
| element = block->cloneElementWithoutChildren(document); |
| else |
| element = createDefaultParagraphElement(document); |
| fillContainerFromString(*element, s); |
| } |
| fragment->appendChild(*element); |
| } |
| return fragment; |
| } |
| |
| String documentTypeString(const Document& document) |
| { |
| DocumentType* documentType = document.doctype(); |
| if (!documentType) |
| return emptyString(); |
| return serializeFragment(*documentType, SerializedNodes::SubtreeIncludingNode); |
| } |
| |
| String urlToMarkup(const URL& url, const String& title) |
| { |
| StringBuilder markup; |
| markup.appendLiteral("<a href=\""); |
| markup.append(url.string()); |
| markup.appendLiteral("\">"); |
| MarkupAccumulator::appendCharactersReplacingEntities(markup, title, 0, title.length(), EntityMaskInPCDATA); |
| markup.appendLiteral("</a>"); |
| return markup.toString(); |
| } |
| |
| ExceptionOr<Ref<DocumentFragment>> createFragmentForInnerOuterHTML(Element& contextElement, const String& markup, ParserContentPolicy parserContentPolicy) |
| { |
| auto* document = &contextElement.document(); |
| if (contextElement.hasTagName(templateTag)) |
| document = &document->ensureTemplateDocument(); |
| auto fragment = DocumentFragment::create(*document); |
| |
| if (document->isHTMLDocument()) { |
| fragment->parseHTML(markup, &contextElement, parserContentPolicy); |
| return fragment; |
| } |
| |
| bool wasValid = fragment->parseXML(markup, &contextElement, parserContentPolicy); |
| if (!wasValid) |
| return Exception { SyntaxError }; |
| return fragment; |
| } |
| |
| RefPtr<DocumentFragment> createFragmentForTransformToFragment(Document& outputDoc, const String& sourceString, const String& sourceMIMEType) |
| { |
| RefPtr<DocumentFragment> fragment = outputDoc.createDocumentFragment(); |
| |
| if (sourceMIMEType == "text/html") { |
| // As far as I can tell, there isn't a spec for how transformToFragment is supposed to work. |
| // Based on the documentation I can find, it looks like we want to start parsing the fragment in the InBody insertion mode. |
| // Unfortunately, that's an implementation detail of the parser. |
| // We achieve that effect here by passing in a fake body element as context for the fragment. |
| auto fakeBody = HTMLBodyElement::create(outputDoc); |
| fragment->parseHTML(sourceString, fakeBody.ptr()); |
| } else if (sourceMIMEType == "text/plain") |
| fragment->parserAppendChild(Text::create(outputDoc, sourceString)); |
| else { |
| bool successfulParse = fragment->parseXML(sourceString, 0); |
| if (!successfulParse) |
| return nullptr; |
| } |
| |
| // FIXME: Do we need to mess with URLs here? |
| |
| return fragment; |
| } |
| |
| Ref<DocumentFragment> createFragmentForImageAndURL(Document& document, const String& url, PresentationSize preferredSize) |
| { |
| auto imageElement = HTMLImageElement::create(document); |
| imageElement->setAttributeWithoutSynchronization(HTMLNames::srcAttr, url); |
| if (preferredSize.width) |
| imageElement->setAttributeWithoutSynchronization(HTMLNames::widthAttr, AtomString::number(*preferredSize.width)); |
| if (preferredSize.height) |
| imageElement->setAttributeWithoutSynchronization(HTMLNames::heightAttr, AtomString::number(*preferredSize.height)); |
| auto fragment = document.createDocumentFragment(); |
| fragment->appendChild(imageElement); |
| |
| return fragment; |
| } |
| |
| static Vector<Ref<HTMLElement>> collectElementsToRemoveFromFragment(ContainerNode& container) |
| { |
| Vector<Ref<HTMLElement>> toRemove; |
| for (auto& element : childrenOfType<HTMLElement>(container)) { |
| if (is<HTMLHtmlElement>(element)) { |
| toRemove.append(element); |
| collectElementsToRemoveFromFragment(element); |
| continue; |
| } |
| if (is<HTMLHeadElement>(element) || is<HTMLBodyElement>(element)) |
| toRemove.append(element); |
| } |
| return toRemove; |
| } |
| |
| static void removeElementFromFragmentPreservingChildren(DocumentFragment& fragment, HTMLElement& element) |
| { |
| RefPtr<Node> nextChild; |
| for (RefPtr<Node> child = element.firstChild(); child; child = nextChild) { |
| nextChild = child->nextSibling(); |
| element.removeChild(*child); |
| fragment.insertBefore(*child, &element); |
| } |
| fragment.removeChild(element); |
| } |
| |
| ExceptionOr<Ref<DocumentFragment>> createContextualFragment(Element& element, const String& markup, ParserContentPolicy parserContentPolicy) |
| { |
| auto result = createFragmentForInnerOuterHTML(element, markup, parserContentPolicy); |
| if (result.hasException()) |
| return result.releaseException(); |
| |
| auto fragment = result.releaseReturnValue(); |
| |
| // We need to pop <html> and <body> elements and remove <head> to |
| // accommodate folks passing complete HTML documents to make the |
| // child of an element. |
| auto toRemove = collectElementsToRemoveFromFragment(fragment); |
| for (auto& element : toRemove) |
| removeElementFromFragmentPreservingChildren(fragment, element); |
| |
| return fragment; |
| } |
| |
| static inline bool hasOneChild(ContainerNode& node) |
| { |
| Node* firstChild = node.firstChild(); |
| return firstChild && !firstChild->nextSibling(); |
| } |
| |
| static inline bool hasOneTextChild(ContainerNode& node) |
| { |
| return hasOneChild(node) && node.firstChild()->isTextNode(); |
| } |
| |
| static inline bool hasMutationEventListeners(const Document& document) |
| { |
| return document.hasListenerType(Document::DOMSUBTREEMODIFIED_LISTENER) |
| || document.hasListenerType(Document::DOMNODEINSERTED_LISTENER) |
| || document.hasListenerType(Document::DOMNODEREMOVED_LISTENER) |
| || document.hasListenerType(Document::DOMNODEREMOVEDFROMDOCUMENT_LISTENER) |
| || document.hasListenerType(Document::DOMCHARACTERDATAMODIFIED_LISTENER); |
| } |
| |
| // We can use setData instead of replacing Text node as long as script can't observe the difference. |
| static inline bool canUseSetDataOptimization(const Text& containerChild, const ChildListMutationScope& mutationScope) |
| { |
| bool authorScriptMayHaveReference = containerChild.refCount(); |
| return !authorScriptMayHaveReference && !mutationScope.canObserve() && !hasMutationEventListeners(containerChild.document()); |
| } |
| |
| ExceptionOr<void> replaceChildrenWithFragment(ContainerNode& container, Ref<DocumentFragment>&& fragment) |
| { |
| Ref<ContainerNode> containerNode(container); |
| ChildListMutationScope mutation(containerNode); |
| |
| if (!fragment->firstChild()) { |
| containerNode->removeChildren(); |
| return { }; |
| } |
| |
| auto* containerChild = containerNode->firstChild(); |
| if (containerChild && !containerChild->nextSibling()) { |
| if (is<Text>(*containerChild) && hasOneTextChild(fragment) && canUseSetDataOptimization(downcast<Text>(*containerChild), mutation)) { |
| ASSERT(!fragment->firstChild()->refCount()); |
| downcast<Text>(*containerChild).setData(downcast<Text>(*fragment->firstChild()).data()); |
| return { }; |
| } |
| |
| return containerNode->replaceChild(fragment, *containerChild); |
| } |
| |
| containerNode->removeChildren(); |
| return containerNode->appendChild(fragment); |
| } |
| |
| } |
