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-rw-r--r--dom/base/nsXHTMLContentSerializer.cpp947
1 files changed, 947 insertions, 0 deletions
diff --git a/dom/base/nsXHTMLContentSerializer.cpp b/dom/base/nsXHTMLContentSerializer.cpp
new file mode 100644
index 000000000..0dc31d7ae
--- /dev/null
+++ b/dom/base/nsXHTMLContentSerializer.cpp
@@ -0,0 +1,947 @@
+/* -*- 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 "nsIDOMElement.h"
+#include "nsIContent.h"
+#include "nsIDocument.h"
+#include "nsNameSpaceManager.h"
+#include "nsString.h"
+#include "nsUnicharUtils.h"
+#include "nsXPIDLString.h"
+#include "nsIServiceManager.h"
+#include "nsIDocumentEncoder.h"
+#include "nsGkAtoms.h"
+#include "nsIURI.h"
+#include "nsNetUtil.h"
+#include "nsEscape.h"
+#include "nsITextToSubURI.h"
+#include "nsCRT.h"
+#include "nsIParserService.h"
+#include "nsContentUtils.h"
+#include "nsLWBrkCIID.h"
+#include "nsIScriptElement.h"
+#include "nsStubMutationObserver.h"
+#include "nsAttrName.h"
+#include "nsParserConstants.h"
+#include "nsComputedDOMStyle.h"
+#include "mozilla/dom/Element.h"
+
+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)
+{
+}
+
+nsXHTMLContentSerializer::~nsXHTMLContentSerializer()
+{
+ NS_ASSERTION(mOLStateStack.IsEmpty(), "Expected OL State stack to be empty");
+}
+
+NS_IMETHODIMP
+nsXHTMLContentSerializer::Init(uint32_t aFlags, uint32_t aWrapColumn,
+ const char* aCharSet, bool aIsCopying,
+ bool aRewriteEncodingDeclaration)
+{
+ // 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, aCharSet, aIsCopying, aRewriteEncodingDeclaration);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ mRewriteEncodingDeclaration = aRewriteEncodingDeclaration;
+ mIsCopying = aIsCopying;
+ mIsFirstChildOfOL = false;
+ mInBody = 0;
+ mDisableEntityEncoding = 0;
+ mBodyOnly = (mFlags & nsIDocumentEncoder::OutputBodyOnly) ? true
+ : false;
+
+ // set up entity converter if we are going to need it
+ if (mFlags & nsIDocumentEncoder::OutputEncodeW3CEntities) {
+ mEntityConverter = do_CreateInstance(NS_ENTITYCONVERTER_CONTRACTID);
+ }
+ 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,
+ nsAString& aStr)
+{
+ NS_ENSURE_ARG(aText);
+
+ 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, aStr), NS_ERROR_OUT_OF_MEMORY);
+ }
+ else if (mDoFormat) {
+ NS_ENSURE_TRUE(AppendToStringFormatedWrapped(data, aStr), NS_ERROR_OUT_OF_MEMORY);
+ }
+ else if (mDoWrap) {
+ NS_ENSURE_TRUE(AppendToStringWrapped(data, aStr), 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, aStr);
+ mDoWrap = false;
+ NS_ENSURE_TRUE(result, NS_ERROR_OUT_OF_MEMORY);
+ }
+ else {
+ NS_ENSURE_TRUE(AppendToStringConvertLF(data, aStr), NS_ERROR_OUT_OF_MEMORY);
+ }
+ }
+
+ return NS_OK;
+}
+
+nsresult
+nsXHTMLContentSerializer::EscapeURI(nsIContent* aContent, const nsAString& aURI, nsAString& aEscapedURI)
+{
+ // URL escape %xx cannot be used in JS.
+ // No escaping if the scheme is 'javascript'.
+ if (IsJavaScript(aContent, nsGkAtoms::href, kNameSpaceID_None, aURI)) {
+ aEscapedURI = aURI;
+ return NS_OK;
+ }
+
+ // nsITextToSubURI does charset convert plus uri escape
+ // This is needed to convert to a document charset which is needed to support existing browsers.
+ // But we eventually want to use UTF-8 instead of a document charset, then the code would be much simpler.
+ // See HTML 4.01 spec, "Appendix B.2.1 Non-ASCII characters in URI attribute values"
+ nsCOMPtr<nsITextToSubURI> textToSubURI;
+ nsAutoString uri(aURI); // in order to use FindCharInSet()
+ nsresult rv = NS_OK;
+
+ if (!mCharset.IsEmpty() && !IsASCII(uri)) {
+ textToSubURI = do_GetService(NS_ITEXTTOSUBURI_CONTRACTID, &rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ int32_t start = 0;
+ int32_t end;
+ nsAutoString part;
+ nsXPIDLCString escapedURI;
+ aEscapedURI.Truncate(0);
+
+ // Loop and escape parts by avoiding escaping reserved characters
+ // (and '%', '#', as well as '[' and ']' for IPv6 address literals).
+ while ((end = uri.FindCharInSet("%#;/?:@&=+$,[]", start)) != -1) {
+ part = Substring(aURI, start, (end-start));
+ if (textToSubURI && !IsASCII(part)) {
+ rv = textToSubURI->ConvertAndEscape(mCharset.get(), part.get(), getter_Copies(escapedURI));
+ NS_ENSURE_SUCCESS(rv, rv);
+ } else if (NS_WARN_IF(!NS_Escape(NS_ConvertUTF16toUTF8(part), escapedURI,
+ url_Path))) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ AppendASCIItoUTF16(escapedURI, aEscapedURI);
+
+ // Append a reserved character without escaping.
+ part = Substring(aURI, end, 1);
+ aEscapedURI.Append(part);
+ start = end + 1;
+ }
+
+ if (start < (int32_t) aURI.Length()) {
+ // Escape the remaining part.
+ part = Substring(aURI, start, aURI.Length()-start);
+ if (textToSubURI) {
+ rv = textToSubURI->ConvertAndEscape(mCharset.get(), part.get(), getter_Copies(escapedURI));
+ NS_ENSURE_SUCCESS(rv, rv);
+ } else if (NS_WARN_IF(!NS_Escape(NS_ConvertUTF16toUTF8(part), escapedURI,
+ url_Path))) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ AppendASCIItoUTF16(escapedURI, aEscapedURI);
+ }
+
+ return rv;
+}
+
+bool
+nsXHTMLContentSerializer::SerializeAttributes(nsIContent* aContent,
+ nsIContent *aOriginalElement,
+ nsAString& aTagPrefix,
+ const nsAString& aTagNamespaceURI,
+ nsIAtom* 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 = aContent->GetNameSpaceID();
+
+ // 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;
+ aContent->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(aContent, 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(EmptyString(), xmlnsStr,
+ aTagNamespaceURI,
+ aStr, true), false);
+ } else {
+ // Serialize namespace decl
+ NS_ENSURE_TRUE(SerializeAttr(xmlnsStr, aTagPrefix,
+ aTagNamespaceURI,
+ aStr, true), false);
+ }
+ PushNameSpaceDecl(aTagPrefix, aTagNamespaceURI, aOriginalElement);
+ }
+
+ NS_NAMED_LITERAL_STRING(_mozStr, "_moz");
+
+ count = aContent->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;
+ }
+
+ BorrowedAttrInfo info = aContent->GetAttrInfoAt(index);
+ const nsAttrName* name = info.mName;
+
+ int32_t namespaceID = name->NamespaceID();
+ nsIAtom* attrName = name->LocalName();
+ nsIAtom* attrPrefix = name->GetPrefix();
+
+ // Filter out any attribute starting with [-|_]moz
+ nsDependentAtomString attrNameStr(attrName);
+ if (StringBeginsWith(attrNameStr, NS_LITERAL_STRING("_moz")) ||
+ StringBeginsWith(attrNameStr, NS_LITERAL_STRING("-moz"))) {
+ 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) {
+ //
+ // Filter out special case of <br type="_moz"> or <br _moz*>,
+ // used by the editor. Bug 16988. Yuck.
+ //
+ if (namespaceID == kNameSpaceID_None && aTagName == nsGkAtoms::br && attrName == nsGkAtoms::type
+ && StringBeginsWith(valueStr, _mozStr)) {
+ continue;
+ }
+
+ if (mIsCopying && mIsFirstChildOfOL && (aTagName == nsGkAtoms::li)
+ && (attrName == nsGkAtoms::value)) {
+ // This is handled separately in SerializeLIValueAttribute()
+ continue;
+ }
+
+ isJS = IsJavaScript(aContent, 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 and APPLET tags,
+ // but that gets more complicated since we have to
+ // search the tag list for CODEBASE as well.
+ // For now, just leave them relative.
+ nsCOMPtr<nsIURI> uri = aContent->GetBaseURI();
+ if (uri) {
+ nsAutoString absURI;
+ rv = NS_MakeAbsoluteURI(absURI, valueStr, uri);
+ if (NS_SUCCEEDED(rv)) {
+ valueStr = absURI;
+ }
+ }
+ }
+ // Need to escape URI.
+ nsAutoString tempURI(valueStr);
+ if (!isJS && NS_FAILED(EscapeURI(aContent, tempURI, valueStr)))
+ valueStr = tempURI;
+ }
+
+ 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;
+ aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::httpEquiv, header);
+ if (header.LowerCaseEqualsLiteral("content-type")) {
+ valueStr = NS_LITERAL_STRING("text/html; charset=") +
+ NS_ConvertASCIItoUTF16(mCharset);
+ }
+ }
+
+ // Expand shorthand attribute.
+ if (namespaceID == kNameSpaceID_None && IsShorthandAttr(attrName, aTagName) && valueStr.IsEmpty()) {
+ valueStr = nameStr;
+ }
+ }
+ else {
+ isJS = IsJavaScript(aContent, 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->HasAttr(kNameSpaceID_None, nsGkAtoms::content)) {
+ nsAutoString header;
+ child->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(NS_LITERAL_STRING("<meta http-equiv=\"content-type\""), aStr), false);
+ NS_ENSURE_TRUE(AppendToString(NS_LITERAL_STRING(" content=\"text/html; charset="), aStr), false);
+ NS_ENSURE_TRUE(AppendToString(NS_ConvertASCIItoUTF16(mCharset), aStr), false);
+ if (mIsHTMLSerializer) {
+ NS_ENSURE_TRUE(AppendToString(NS_LITERAL_STRING("\">"), aStr), false);
+ } else {
+ NS_ENSURE_TRUE(AppendToString(NS_LITERAL_STRING("\" />"), 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(nsIDocument *aDocument,
+ nsAString& aStr)
+{
+ if (!mBodyOnly)
+ return nsXMLContentSerializer::AppendDocumentStart(aDocument, aStr);
+
+ return NS_OK;
+}
+
+bool
+nsXHTMLContentSerializer::CheckElementStart(nsIContent * aContent,
+ 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) &&
+ aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::mozdirty);
+
+ if (aContent->IsHTMLElement(nsGkAtoms::br) &&
+ (mFlags & nsIDocumentEncoder::OutputNoFormattingInPre) &&
+ PreLevel() > 0) {
+ aResult = AppendNewLineToString(aStr) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
+ return false;
+ }
+
+ if (aContent->IsHTMLElement(nsGkAtoms::body)) {
+ ++mInBody;
+ }
+
+ return true;
+}
+
+bool
+nsXHTMLContentSerializer::CheckElementEnd(mozilla::dom::Element* aElement,
+ 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.RemoveElementAt(mOLStateStack.Length() -1);
+ }
+ }
+
+ bool dummyFormat;
+ return nsXMLContentSerializer::CheckElementEnd(aElement, dummyFormat, aStr);
+}
+
+bool
+nsXHTMLContentSerializer::AppendAndTranslateEntities(const nsAString& aStr,
+ nsAString& aOutputStr)
+{
+ if (mBodyOnly && !mInBody) {
+ return true;
+ }
+
+ if (mDisableEntityEncoding) {
+ return aOutputStr.Append(aStr, mozilla::fallible);
+ }
+
+ return nsXMLContentSerializer::AppendAndTranslateEntities(aStr, aOutputStr);
+}
+
+bool
+nsXHTMLContentSerializer::IsShorthandAttr(const nsIAtom* aAttrName,
+ const nsIAtom* 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, nsIAtom* 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;
+ }
+ else {
+ nsIParserService* parserService = nsContentUtils::GetParserService();
+
+ if (parserService) {
+ bool res;
+ parserService->
+ IsBlock(parserService->HTMLCaseSensitiveAtomTagToId(aName), res);
+ return res;
+ }
+ }
+
+ return mAddSpace;
+}
+
+bool
+nsXHTMLContentSerializer::LineBreakAfterOpen(int32_t aNamespaceID, nsIAtom* 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, nsIAtom* 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, nsIAtom* 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::pre) ||
+ (aName == nsGkAtoms::title) ||
+ (aName == nsGkAtoms::li) ||
+ (aName == nsGkAtoms::dt) ||
+ (aName == nsGkAtoms::dd) ||
+ (aName == nsGkAtoms::blockquote) ||
+ (aName == nsGkAtoms::select) ||
+ (aName == nsGkAtoms::option) ||
+ (aName == nsGkAtoms::p) ||
+ (aName == nsGkAtoms::map) ||
+ (aName == nsGkAtoms::div)) {
+ return true;
+ }
+ else {
+ nsIParserService* parserService = nsContentUtils::GetParserService();
+
+ if (parserService) {
+ bool res;
+ parserService->
+ IsBlock(parserService->HTMLCaseSensitiveAtomTagToId(aName), res);
+ return res;
+ }
+ }
+
+ return false;
+}
+
+
+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<nsStyleContext> styleContext =
+ nsComputedDOMStyle::GetStyleContextForElementNoFlush(aNode->AsElement(),
+ nullptr, nullptr);
+ if (styleContext) {
+ const nsStyleText* textStyle = styleContext->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;
+ nsCOMPtr<nsIDOMNode> currNode = do_QueryInterface(aElement);
+ 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 tocurrNode traverse.
+ while (currNode && !found) {
+ nsCOMPtr<nsIDOMElement> currElement = do_QueryInterface(currNode);
+ // currElement may be null if it were a text node.
+ if (currElement) {
+ nsAutoString tagName;
+ currElement->GetTagName(tagName);
+ if (tagName.LowerCaseEqualsLiteral("li")) {
+ currElement->GetAttribute(NS_LITERAL_STRING("value"), valueStr);
+ if (valueStr.IsEmpty())
+ offset++;
+ else {
+ found = true;
+ nsresult rv = NS_OK;
+ startVal = valueStr.ToInteger(&rv);
+ }
+ }
+ }
+ nsCOMPtr<nsIDOMNode> tmp;
+ currNode->GetPreviousSibling(getter_AddRefs(tmp));
+ currNode.swap(tmp);
+ }
+ // 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(EmptyString(), NS_LITERAL_STRING("value"),
+ 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(EmptyString(), NS_LITERAL_STRING("value"),
+ valueStr, aStr, false), false);
+ }
+
+ return true;
+}
+
+bool
+nsXHTMLContentSerializer::IsFirstChildOfOL(nsIContent* aElement)
+{
+ nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aElement);
+ nsAutoString parentName;
+
+ nsCOMPtr<nsIDOMNode> parentNode;
+ node->GetParentNode(getter_AddRefs(parentNode));
+ if (parentNode)
+ parentNode->GetNodeName(parentName);
+ else
+ return false;
+
+ if (parentName.LowerCaseEqualsLiteral("ol")) {
+
+ if (!mOLStateStack.IsEmpty()) {
+ olState state = mOLStateStack[mOLStateStack.Length()-1];
+ if (state.isFirstListItem)
+ return true;
+ }
+
+ return false;
+ }
+ else
+ return false;
+}
+
+bool
+nsXHTMLContentSerializer::HasNoChildren(nsIContent * aContent) {
+
+ for (nsIContent* child = aContent->GetFirstChild();
+ child;
+ child = child->GetNextSibling()) {
+
+ if (!child->IsNodeOfType(nsINode::eTEXT))
+ return false;
+
+ if (child->TextLength())
+ return false;
+ }
+
+ return true;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 18:51:28 +0000