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-rw-r--r--dom/serializers/nsXHTMLContentSerializer.cpp731
1 files changed, 731 insertions, 0 deletions
diff --git a/dom/serializers/nsXHTMLContentSerializer.cpp b/dom/serializers/nsXHTMLContentSerializer.cpp
new file mode 100644
index 0000000000..415db224ef
--- /dev/null
+++ b/dom/serializers/nsXHTMLContentSerializer.cpp
@@ -0,0 +1,731 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * nsIContentSerializer implementation that can be used with an
+ * nsIDocumentEncoder to convert an XHTML (not HTML!) DOM to an XHTML
+ * string that could be parsed into more or less the original DOM.
+ */
+
+#include "nsXHTMLContentSerializer.h"
+
+#include "mozilla/dom/Element.h"
+#include "nsIContent.h"
+#include "mozilla/dom/Document.h"
+#include "nsElementTable.h"
+#include "nsNameSpaceManager.h"
+#include "nsString.h"
+#include "nsUnicharUtils.h"
+#include "nsIDocumentEncoder.h"
+#include "nsGkAtoms.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "nsEscape.h"
+#include "nsCRT.h"
+#include "nsContentUtils.h"
+#include "nsIScriptElement.h"
+#include "nsStubMutationObserver.h"
+#include "nsAttrName.h"
+#include "nsComputedDOMStyle.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static const int32_t kLongLineLen = 128;
+
+#define kXMLNS "xmlns"
+
+nsresult NS_NewXHTMLContentSerializer(nsIContentSerializer** aSerializer) {
+ RefPtr<nsXHTMLContentSerializer> it = new nsXHTMLContentSerializer();
+ it.forget(aSerializer);
+ return NS_OK;
+}
+
+nsXHTMLContentSerializer::nsXHTMLContentSerializer()
+ : mIsHTMLSerializer(false),
+ mIsCopying(false),
+ mDisableEntityEncoding(0),
+ mRewriteEncodingDeclaration(false),
+ mIsFirstChildOfOL(false) {}
+
+nsXHTMLContentSerializer::~nsXHTMLContentSerializer() {
+ NS_ASSERTION(mOLStateStack.IsEmpty(), "Expected OL State stack to be empty");
+}
+
+NS_IMETHODIMP
+nsXHTMLContentSerializer::Init(uint32_t aFlags, uint32_t aWrapColumn,
+ const Encoding* aEncoding, bool aIsCopying,
+ bool aRewriteEncodingDeclaration,
+ bool* aNeedsPreformatScanning,
+ nsAString& aOutput) {
+ // The previous version of the HTML serializer did implicit wrapping
+ // when there is no flags, so we keep wrapping in order to keep
+ // compatibility with the existing calling code
+ // XXXLJ perhaps should we remove this default settings later ?
+ if (aFlags & nsIDocumentEncoder::OutputFormatted) {
+ aFlags = aFlags | nsIDocumentEncoder::OutputWrap;
+ }
+
+ nsresult rv;
+ rv = nsXMLContentSerializer::Init(aFlags, aWrapColumn, aEncoding, aIsCopying,
+ aRewriteEncodingDeclaration,
+ aNeedsPreformatScanning, aOutput);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ mRewriteEncodingDeclaration = aRewriteEncodingDeclaration;
+ mIsCopying = aIsCopying;
+ mIsFirstChildOfOL = false;
+ mInBody = 0;
+ mDisableEntityEncoding = 0;
+ mBodyOnly = (mFlags & nsIDocumentEncoder::OutputBodyOnly);
+
+ return NS_OK;
+}
+
+// See if the string has any lines longer than longLineLen:
+// if so, we presume formatting is wonky (e.g. the node has been edited)
+// and we'd better rewrap the whole text node.
+bool nsXHTMLContentSerializer::HasLongLines(const nsString& text,
+ int32_t& aLastNewlineOffset) {
+ uint32_t start = 0;
+ uint32_t theLen = text.Length();
+ bool rv = false;
+ aLastNewlineOffset = kNotFound;
+ for (start = 0; start < theLen;) {
+ int32_t eol = text.FindChar('\n', start);
+ if (eol < 0) {
+ eol = text.Length();
+ } else {
+ aLastNewlineOffset = eol;
+ }
+ if (int32_t(eol - start) > kLongLineLen) rv = true;
+ start = eol + 1;
+ }
+ return rv;
+}
+
+NS_IMETHODIMP
+nsXHTMLContentSerializer::AppendText(nsIContent* aText, int32_t aStartOffset,
+ int32_t aEndOffset) {
+ NS_ENSURE_ARG(aText);
+ NS_ENSURE_STATE(mOutput);
+
+ nsAutoString data;
+ nsresult rv;
+
+ rv = AppendTextData(aText, aStartOffset, aEndOffset, data, true);
+ if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
+
+ if (mDoRaw || PreLevel() > 0) {
+ NS_ENSURE_TRUE(AppendToStringConvertLF(data, *mOutput),
+ NS_ERROR_OUT_OF_MEMORY);
+ } else if (mDoFormat) {
+ NS_ENSURE_TRUE(AppendToStringFormatedWrapped(data, *mOutput),
+ NS_ERROR_OUT_OF_MEMORY);
+ } else if (mDoWrap) {
+ NS_ENSURE_TRUE(AppendToStringWrapped(data, *mOutput),
+ NS_ERROR_OUT_OF_MEMORY);
+ } else {
+ int32_t lastNewlineOffset = kNotFound;
+ if (HasLongLines(data, lastNewlineOffset)) {
+ // We have long lines, rewrap
+ mDoWrap = true;
+ bool result = AppendToStringWrapped(data, *mOutput);
+ mDoWrap = false;
+ NS_ENSURE_TRUE(result, NS_ERROR_OUT_OF_MEMORY);
+ } else {
+ NS_ENSURE_TRUE(AppendToStringConvertLF(data, *mOutput),
+ NS_ERROR_OUT_OF_MEMORY);
+ }
+ }
+
+ return NS_OK;
+}
+
+bool nsXHTMLContentSerializer::SerializeAttributes(
+ Element* aElement, Element* aOriginalElement, nsAString& aTagPrefix,
+ const nsAString& aTagNamespaceURI, nsAtom* aTagName, nsAString& aStr,
+ uint32_t aSkipAttr, bool aAddNSAttr) {
+ nsresult rv;
+ uint32_t index, count;
+ nsAutoString prefixStr, uriStr, valueStr;
+ nsAutoString xmlnsStr;
+ xmlnsStr.AssignLiteral(kXMLNS);
+
+ int32_t contentNamespaceID = aElement->GetNameSpaceID();
+
+ MaybeSerializeIsValue(aElement, aStr);
+
+ // this method is not called by nsHTMLContentSerializer
+ // so we don't have to check HTML element, just XHTML
+
+ if (mIsCopying && kNameSpaceID_XHTML == contentNamespaceID) {
+ // Need to keep track of OL and LI elements in order to get ordinal number
+ // for the LI.
+ if (aTagName == nsGkAtoms::ol) {
+ // We are copying and current node is an OL;
+ // Store its start attribute value in olState->startVal.
+ nsAutoString start;
+ int32_t startAttrVal = 0;
+ aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::start, start);
+ if (!start.IsEmpty()) {
+ nsresult rv = NS_OK;
+ startAttrVal = start.ToInteger(&rv);
+ // If OL has "start" attribute, first LI element has to start with that
+ // value Therefore subtracting 1 as all the LI elements are incrementing
+ // it before using it; In failure of ToInteger(), default StartAttrValue
+ // to 0.
+ if (NS_SUCCEEDED(rv))
+ --startAttrVal;
+ else
+ startAttrVal = 0;
+ }
+ olState state(startAttrVal, true);
+ mOLStateStack.AppendElement(state);
+ } else if (aTagName == nsGkAtoms::li) {
+ mIsFirstChildOfOL = IsFirstChildOfOL(aOriginalElement);
+ if (mIsFirstChildOfOL) {
+ // If OL is parent of this LI, serialize attributes in different manner.
+ NS_ENSURE_TRUE(SerializeLIValueAttribute(aElement, aStr), false);
+ }
+ }
+ }
+
+ // If we had to add a new namespace declaration, serialize
+ // and push it on the namespace stack
+ if (aAddNSAttr) {
+ if (aTagPrefix.IsEmpty()) {
+ // Serialize default namespace decl
+ NS_ENSURE_TRUE(
+ SerializeAttr(u""_ns, xmlnsStr, aTagNamespaceURI, aStr, true), false);
+ } else {
+ // Serialize namespace decl
+ NS_ENSURE_TRUE(
+ SerializeAttr(xmlnsStr, aTagPrefix, aTagNamespaceURI, aStr, true),
+ false);
+ }
+ PushNameSpaceDecl(aTagPrefix, aTagNamespaceURI, aOriginalElement);
+ }
+
+ count = aElement->GetAttrCount();
+
+ // Now serialize each of the attributes
+ // XXX Unfortunately we need a namespace manager to get
+ // attribute URIs.
+ for (index = 0; index < count; index++) {
+ if (aSkipAttr == index) {
+ continue;
+ }
+
+ dom::BorrowedAttrInfo info = aElement->GetAttrInfoAt(index);
+ const nsAttrName* name = info.mName;
+
+ int32_t namespaceID = name->NamespaceID();
+ nsAtom* attrName = name->LocalName();
+ nsAtom* attrPrefix = name->GetPrefix();
+
+ // Filter out any attribute starting with [-|_]moz
+ nsDependentAtomString attrNameStr(attrName);
+ if (StringBeginsWith(attrNameStr, u"_moz"_ns) ||
+ StringBeginsWith(attrNameStr, u"-moz"_ns)) {
+ continue;
+ }
+
+ if (attrPrefix) {
+ attrPrefix->ToString(prefixStr);
+ } else {
+ prefixStr.Truncate();
+ }
+
+ bool addNSAttr = false;
+ if (kNameSpaceID_XMLNS != namespaceID) {
+ nsContentUtils::NameSpaceManager()->GetNameSpaceURI(namespaceID, uriStr);
+ addNSAttr = ConfirmPrefix(prefixStr, uriStr, aOriginalElement, true);
+ }
+
+ info.mValue->ToString(valueStr);
+
+ nsDependentAtomString nameStr(attrName);
+ bool isJS = false;
+
+ if (kNameSpaceID_XHTML == contentNamespaceID) {
+ if (mIsCopying && mIsFirstChildOfOL && (aTagName == nsGkAtoms::li) &&
+ (attrName == nsGkAtoms::value)) {
+ // This is handled separately in SerializeLIValueAttribute()
+ continue;
+ }
+
+ isJS = IsJavaScript(aElement, attrName, namespaceID, valueStr);
+
+ if (namespaceID == kNameSpaceID_None &&
+ ((attrName == nsGkAtoms::href) || (attrName == nsGkAtoms::src))) {
+ // Make all links absolute when converting only the selection:
+ if (mFlags & nsIDocumentEncoder::OutputAbsoluteLinks) {
+ // Would be nice to handle OBJECT tags,
+ // but that gets more complicated since we have to
+ // search the tag list for CODEBASE as well.
+ // For now, just leave them relative.
+ nsIURI* uri = aElement->GetBaseURI();
+ if (uri) {
+ nsAutoString absURI;
+ rv = NS_MakeAbsoluteURI(absURI, valueStr, uri);
+ if (NS_SUCCEEDED(rv)) {
+ valueStr = absURI;
+ }
+ }
+ }
+ }
+
+ if (mRewriteEncodingDeclaration && aTagName == nsGkAtoms::meta &&
+ attrName == nsGkAtoms::content) {
+ // If we're serializing a <meta http-equiv="content-type">,
+ // use the proper value, rather than what's in the document.
+ nsAutoString header;
+ aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv, header);
+ if (header.LowerCaseEqualsLiteral("content-type")) {
+ valueStr =
+ u"text/html; charset="_ns + NS_ConvertASCIItoUTF16(mCharset);
+ }
+ }
+
+ // Expand shorthand attribute.
+ if (namespaceID == kNameSpaceID_None &&
+ IsShorthandAttr(attrName, aTagName) && valueStr.IsEmpty()) {
+ valueStr = nameStr;
+ }
+ } else {
+ isJS = IsJavaScript(aElement, attrName, namespaceID, valueStr);
+ }
+
+ NS_ENSURE_TRUE(SerializeAttr(prefixStr, nameStr, valueStr, aStr, !isJS),
+ false);
+
+ if (addNSAttr) {
+ NS_ASSERTION(!prefixStr.IsEmpty(),
+ "Namespaced attributes must have a prefix");
+ NS_ENSURE_TRUE(SerializeAttr(xmlnsStr, prefixStr, uriStr, aStr, true),
+ false);
+ PushNameSpaceDecl(prefixStr, uriStr, aOriginalElement);
+ }
+ }
+
+ return true;
+}
+
+bool nsXHTMLContentSerializer::AfterElementStart(nsIContent* aContent,
+ nsIContent* aOriginalElement,
+ nsAString& aStr) {
+ if (mRewriteEncodingDeclaration && aContent->IsHTMLElement(nsGkAtoms::head)) {
+ // Check if there already are any content-type meta children.
+ // If there are, they will be modified to use the correct charset.
+ // If there aren't, we'll insert one here.
+ bool hasMeta = false;
+ for (nsIContent* child = aContent->GetFirstChild(); child;
+ child = child->GetNextSibling()) {
+ if (child->IsHTMLElement(nsGkAtoms::meta) &&
+ child->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::content)) {
+ nsAutoString header;
+ child->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv,
+ header);
+
+ if (header.LowerCaseEqualsLiteral("content-type")) {
+ hasMeta = true;
+ break;
+ }
+ }
+ }
+
+ if (!hasMeta) {
+ NS_ENSURE_TRUE(AppendNewLineToString(aStr), false);
+ if (mDoFormat) {
+ NS_ENSURE_TRUE(AppendIndentation(aStr), false);
+ }
+ NS_ENSURE_TRUE(
+ AppendToString(u"<meta http-equiv=\"content-type\""_ns, aStr), false);
+ NS_ENSURE_TRUE(AppendToString(u" content=\"text/html; charset="_ns, aStr),
+ false);
+ NS_ENSURE_TRUE(AppendToString(NS_ConvertASCIItoUTF16(mCharset), aStr),
+ false);
+ if (mIsHTMLSerializer) {
+ NS_ENSURE_TRUE(AppendToString(u"\">"_ns, aStr), false);
+ } else {
+ NS_ENSURE_TRUE(AppendToString(u"\" />"_ns, aStr), false);
+ }
+ }
+ }
+
+ return true;
+}
+
+void nsXHTMLContentSerializer::AfterElementEnd(nsIContent* aContent,
+ nsAString& aStr) {
+ NS_ASSERTION(!mIsHTMLSerializer,
+ "nsHTMLContentSerializer shouldn't call this method !");
+
+ // this method is not called by nsHTMLContentSerializer
+ // so we don't have to check HTML element, just XHTML
+ if (aContent->IsHTMLElement(nsGkAtoms::body)) {
+ --mInBody;
+ }
+}
+
+NS_IMETHODIMP
+nsXHTMLContentSerializer::AppendDocumentStart(Document* aDocument) {
+ if (!mBodyOnly) {
+ return nsXMLContentSerializer::AppendDocumentStart(aDocument);
+ }
+
+ return NS_OK;
+}
+
+bool nsXHTMLContentSerializer::CheckElementStart(Element* aElement,
+ bool& aForceFormat,
+ nsAString& aStr,
+ nsresult& aResult) {
+ aResult = NS_OK;
+
+ // The _moz_dirty attribute is emitted by the editor to
+ // indicate that this element should be pretty printed
+ // even if we're not in pretty printing mode
+ aForceFormat = !(mFlags & nsIDocumentEncoder::OutputIgnoreMozDirty) &&
+ aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::mozdirty);
+
+ if (aElement->IsHTMLElement(nsGkAtoms::br) &&
+ (mFlags & nsIDocumentEncoder::OutputNoFormattingInPre) &&
+ PreLevel() > 0) {
+ aResult = AppendNewLineToString(aStr) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+ return false;
+ }
+
+ if (aElement->IsHTMLElement(nsGkAtoms::body)) {
+ ++mInBody;
+ }
+
+ return true;
+}
+
+bool nsXHTMLContentSerializer::CheckElementEnd(Element* aElement,
+ Element* aOriginalElement,
+ bool& aForceFormat,
+ nsAString& aStr) {
+ NS_ASSERTION(!mIsHTMLSerializer,
+ "nsHTMLContentSerializer shouldn't call this method !");
+
+ aForceFormat = !(mFlags & nsIDocumentEncoder::OutputIgnoreMozDirty) &&
+ aElement->HasAttr(kNameSpaceID_None, nsGkAtoms::mozdirty);
+
+ if (mIsCopying && aElement->IsHTMLElement(nsGkAtoms::ol)) {
+ NS_ASSERTION((!mOLStateStack.IsEmpty()), "Cannot have an empty OL Stack");
+ /* Though at this point we must always have an state to be deleted as all
+ the OL opening tags are supposed to push an olState object to the stack*/
+ if (!mOLStateStack.IsEmpty()) {
+ mOLStateStack.RemoveLastElement();
+ }
+ }
+
+ bool dummyFormat;
+ return nsXMLContentSerializer::CheckElementEnd(aElement, aOriginalElement,
+ dummyFormat, aStr);
+}
+
+bool nsXHTMLContentSerializer::AppendAndTranslateEntities(
+ const nsAString& aStr, nsAString& aOutputStr) {
+ if (mBodyOnly && !mInBody) {
+ return true;
+ }
+
+ if (mDisableEntityEncoding) {
+ return aOutputStr.Append(aStr, fallible);
+ }
+
+ return nsXMLContentSerializer::AppendAndTranslateEntities(aStr, aOutputStr);
+}
+
+bool nsXHTMLContentSerializer::IsShorthandAttr(const nsAtom* aAttrName,
+ const nsAtom* aElementName) {
+ // checked
+ if ((aAttrName == nsGkAtoms::checked) && (aElementName == nsGkAtoms::input)) {
+ return true;
+ }
+
+ // compact
+ if ((aAttrName == nsGkAtoms::compact) &&
+ (aElementName == nsGkAtoms::dir || aElementName == nsGkAtoms::dl ||
+ aElementName == nsGkAtoms::menu || aElementName == nsGkAtoms::ol ||
+ aElementName == nsGkAtoms::ul)) {
+ return true;
+ }
+
+ // declare
+ if ((aAttrName == nsGkAtoms::declare) &&
+ (aElementName == nsGkAtoms::object)) {
+ return true;
+ }
+
+ // defer
+ if ((aAttrName == nsGkAtoms::defer) && (aElementName == nsGkAtoms::script)) {
+ return true;
+ }
+
+ // disabled
+ if ((aAttrName == nsGkAtoms::disabled) &&
+ (aElementName == nsGkAtoms::button || aElementName == nsGkAtoms::input ||
+ aElementName == nsGkAtoms::optgroup ||
+ aElementName == nsGkAtoms::option || aElementName == nsGkAtoms::select ||
+ aElementName == nsGkAtoms::textarea)) {
+ return true;
+ }
+
+ // ismap
+ if ((aAttrName == nsGkAtoms::ismap) &&
+ (aElementName == nsGkAtoms::img || aElementName == nsGkAtoms::input)) {
+ return true;
+ }
+
+ // multiple
+ if ((aAttrName == nsGkAtoms::multiple) &&
+ (aElementName == nsGkAtoms::select)) {
+ return true;
+ }
+
+ // noresize
+ if ((aAttrName == nsGkAtoms::noresize) &&
+ (aElementName == nsGkAtoms::frame)) {
+ return true;
+ }
+
+ // noshade
+ if ((aAttrName == nsGkAtoms::noshade) && (aElementName == nsGkAtoms::hr)) {
+ return true;
+ }
+
+ // nowrap
+ if ((aAttrName == nsGkAtoms::nowrap) &&
+ (aElementName == nsGkAtoms::td || aElementName == nsGkAtoms::th)) {
+ return true;
+ }
+
+ // readonly
+ if ((aAttrName == nsGkAtoms::readonly) &&
+ (aElementName == nsGkAtoms::input ||
+ aElementName == nsGkAtoms::textarea)) {
+ return true;
+ }
+
+ // selected
+ if ((aAttrName == nsGkAtoms::selected) &&
+ (aElementName == nsGkAtoms::option)) {
+ return true;
+ }
+
+ // autoplay and controls
+ if ((aElementName == nsGkAtoms::video || aElementName == nsGkAtoms::audio) &&
+ (aAttrName == nsGkAtoms::autoplay || aAttrName == nsGkAtoms::muted ||
+ aAttrName == nsGkAtoms::controls)) {
+ return true;
+ }
+
+ return false;
+}
+
+bool nsXHTMLContentSerializer::LineBreakBeforeOpen(int32_t aNamespaceID,
+ nsAtom* aName) {
+ if (aNamespaceID != kNameSpaceID_XHTML) {
+ return mAddSpace;
+ }
+
+ if (aName == nsGkAtoms::title || aName == nsGkAtoms::meta ||
+ aName == nsGkAtoms::link || aName == nsGkAtoms::style ||
+ aName == nsGkAtoms::select || aName == nsGkAtoms::option ||
+ aName == nsGkAtoms::script || aName == nsGkAtoms::html) {
+ return true;
+ }
+
+ return nsHTMLElement::IsBlock(nsHTMLTags::CaseSensitiveAtomTagToId(aName));
+}
+
+bool nsXHTMLContentSerializer::LineBreakAfterOpen(int32_t aNamespaceID,
+ nsAtom* aName) {
+ if (aNamespaceID != kNameSpaceID_XHTML) {
+ return false;
+ }
+
+ if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
+ (aName == nsGkAtoms::body) || (aName == nsGkAtoms::ul) ||
+ (aName == nsGkAtoms::ol) || (aName == nsGkAtoms::dl) ||
+ (aName == nsGkAtoms::table) || (aName == nsGkAtoms::tbody) ||
+ (aName == nsGkAtoms::tr) || (aName == nsGkAtoms::br) ||
+ (aName == nsGkAtoms::meta) || (aName == nsGkAtoms::link) ||
+ (aName == nsGkAtoms::script) || (aName == nsGkAtoms::select) ||
+ (aName == nsGkAtoms::map) || (aName == nsGkAtoms::area) ||
+ (aName == nsGkAtoms::style)) {
+ return true;
+ }
+
+ return false;
+}
+
+bool nsXHTMLContentSerializer::LineBreakBeforeClose(int32_t aNamespaceID,
+ nsAtom* aName) {
+ if (aNamespaceID != kNameSpaceID_XHTML) {
+ return false;
+ }
+
+ if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
+ (aName == nsGkAtoms::body) || (aName == nsGkAtoms::ul) ||
+ (aName == nsGkAtoms::ol) || (aName == nsGkAtoms::dl) ||
+ (aName == nsGkAtoms::select) || (aName == nsGkAtoms::table) ||
+ (aName == nsGkAtoms::tbody)) {
+ return true;
+ }
+ return false;
+}
+
+bool nsXHTMLContentSerializer::LineBreakAfterClose(int32_t aNamespaceID,
+ nsAtom* aName) {
+ if (aNamespaceID != kNameSpaceID_XHTML) {
+ return false;
+ }
+
+ if ((aName == nsGkAtoms::html) || (aName == nsGkAtoms::head) ||
+ (aName == nsGkAtoms::body) || (aName == nsGkAtoms::tr) ||
+ (aName == nsGkAtoms::th) || (aName == nsGkAtoms::td) ||
+ (aName == nsGkAtoms::title) || (aName == nsGkAtoms::dt) ||
+ (aName == nsGkAtoms::dd) || (aName == nsGkAtoms::select) ||
+ (aName == nsGkAtoms::option) || (aName == nsGkAtoms::map)) {
+ return true;
+ }
+
+ return nsHTMLElement::IsBlock(nsHTMLTags::CaseSensitiveAtomTagToId(aName));
+}
+
+void nsXHTMLContentSerializer::MaybeEnterInPreContent(nsIContent* aNode) {
+ if (!ShouldMaintainPreLevel() || !aNode->IsHTMLElement()) {
+ return;
+ }
+
+ if (IsElementPreformatted(aNode) ||
+ aNode->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style,
+ nsGkAtoms::noscript, nsGkAtoms::noframes)) {
+ PreLevel()++;
+ }
+}
+
+void nsXHTMLContentSerializer::MaybeLeaveFromPreContent(nsIContent* aNode) {
+ if (!ShouldMaintainPreLevel() || !aNode->IsHTMLElement()) {
+ return;
+ }
+
+ if (IsElementPreformatted(aNode) ||
+ aNode->IsAnyOfHTMLElements(nsGkAtoms::script, nsGkAtoms::style,
+ nsGkAtoms::noscript, nsGkAtoms::noframes)) {
+ --PreLevel();
+ }
+}
+
+bool nsXHTMLContentSerializer::IsElementPreformatted(nsIContent* aNode) {
+ MOZ_ASSERT(ShouldMaintainPreLevel(),
+ "We should not be calling this needlessly");
+
+ if (!aNode->IsElement()) {
+ return false;
+ }
+ RefPtr<ComputedStyle> computedStyle =
+ nsComputedDOMStyle::GetComputedStyleNoFlush(aNode->AsElement(), nullptr);
+ if (computedStyle) {
+ const nsStyleText* textStyle = computedStyle->StyleText();
+ return textStyle->WhiteSpaceOrNewlineIsSignificant();
+ }
+ return false;
+}
+
+bool nsXHTMLContentSerializer::SerializeLIValueAttribute(nsIContent* aElement,
+ nsAString& aStr) {
+ // We are copying and we are at the "first" LI node of OL in selected range.
+ // It may not be the first LI child of OL but it's first in the selected
+ // range. Note that we get into this condition only once per a OL.
+ bool found = false;
+ nsAutoString valueStr;
+
+ olState state(0, false);
+
+ if (!mOLStateStack.IsEmpty()) {
+ state = mOLStateStack[mOLStateStack.Length() - 1];
+ // isFirstListItem should be true only before the serialization of the
+ // first item in the list.
+ state.isFirstListItem = false;
+ mOLStateStack[mOLStateStack.Length() - 1] = state;
+ }
+
+ int32_t startVal = state.startVal;
+ int32_t offset = 0;
+
+ // Traverse previous siblings until we find one with "value" attribute.
+ // offset keeps track of how many previous siblings we had to traverse.
+ nsIContent* currNode = aElement;
+ while (currNode && !found) {
+ if (currNode->IsHTMLElement(nsGkAtoms::li)) {
+ currNode->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::value,
+ valueStr);
+ if (valueStr.IsEmpty()) {
+ offset++;
+ } else {
+ found = true;
+ nsresult rv = NS_OK;
+ startVal = valueStr.ToInteger(&rv);
+ }
+ }
+ currNode = currNode->GetPreviousSibling();
+ }
+ // If LI was not having "value", Set the "value" attribute for it.
+ // Note that We are at the first LI in the selected range of OL.
+ if (offset == 0 && found) {
+ // offset = 0 => LI itself has the value attribute and we did not need to
+ // traverse back. Just serialize value attribute like other tags.
+ NS_ENSURE_TRUE(SerializeAttr(u""_ns, u"value"_ns, valueStr, aStr, false),
+ false);
+ } else if (offset == 1 && !found) {
+ /*(offset = 1 && !found) means either LI is the first child node of OL
+ and LI is not having "value" attribute.
+ In that case we would not like to set "value" attribute to reduce the
+ changes.
+ */
+ // do nothing...
+ } else if (offset > 0) {
+ // Set value attribute.
+ nsAutoString valueStr;
+
+ // As serializer needs to use this valueAttr we are creating here,
+ valueStr.AppendInt(startVal + offset);
+ NS_ENSURE_TRUE(SerializeAttr(u""_ns, u"value"_ns, valueStr, aStr, false),
+ false);
+ }
+
+ return true;
+}
+
+bool nsXHTMLContentSerializer::IsFirstChildOfOL(nsIContent* aElement) {
+ nsIContent* parent = aElement->GetParent();
+ if (parent && parent->NodeName().LowerCaseEqualsLiteral("ol")) {
+ if (!mOLStateStack.IsEmpty()) {
+ olState state = mOLStateStack[mOLStateStack.Length() - 1];
+ if (state.isFirstListItem) return true;
+ }
+ }
+
+ return false;
+}
+
+bool nsXHTMLContentSerializer::HasNoChildren(nsIContent* aContent) {
+ for (nsIContent* child = aContent->GetFirstChild(); child;
+ child = child->GetNextSibling()) {
+ if (!child->IsText()) return false;
+
+ if (child->TextLength()) return false;
+ }
+
+ return true;
+}