pjs/parser/html/nsParserUtils.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Robert Sayre.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsString.h"
#include "nsIComponentManager.h"
#include "nsCOMPtr.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsXPIDLString.h"
#include "nsScriptLoader.h"
#include "nsEscape.h"
#include "nsIParser.h"
#include "nsIDTD.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsParserCIID.h"
#include "nsContentUtils.h"
#include "nsIContentSink.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMDocumentFragment.h"
#include "nsIFragmentContentSink.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDocument.h"
#include "nsIContent.h"
#include "nsAttrName.h"
#include "nsHTMLParts.h"
#include "nsContentCID.h"
#include "nsIScriptableUnescapeHTML.h"
#include "nsParserUtils.h"
#include "nsAutoPtr.h"
#include "nsTreeSanitizer.h"
#include "nsHtml5Module.h"
#define XHTML_DIV_TAG "div xmlns=\"http://www.w3.org/1999/xhtml\""
NS_IMPL_ISUPPORTS2(nsParserUtils,
nsIScriptableUnescapeHTML,
nsIParserUtils)
static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
NS_IMETHODIMP
nsParserUtils::ConvertToPlainText(const nsAString & aFromStr,
PRUint32 aFlags,
PRUint32 aWrapCol,
nsAString & aToStr)
{
return nsContentUtils::ConvertToPlainText(aFromStr,
aToStr,
aFlags,
aWrapCol);
}
NS_IMETHODIMP
nsParserUtils::Unescape(const nsAString & aFromStr,
nsAString & aToStr)
{
return nsContentUtils::ConvertToPlainText(aFromStr,
aToStr,
nsIDocumentEncoder::OutputSelectionOnly |
nsIDocumentEncoder::OutputAbsoluteLinks,
0);
}
// The feed version of nsContentUtils::CreateContextualFragment It
// creates a fragment, but doesn't go to all the effort to preserve
// context like innerHTML does, because feed DOMs shouldn't have that.
NS_IMETHODIMP
nsParserUtils::ParseFragment(const nsAString &aFragment,
bool aIsXML,
nsIURI* aBaseURI,
nsIDOMElement* aContextElement,
nsIDOMDocumentFragment** aReturn)
{
NS_ENSURE_ARG(aContextElement);
*aReturn = nsnull;
nsresult rv;
nsCOMPtr<nsIParser> parser = do_CreateInstance(kCParserCID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocument> document;
nsCOMPtr<nsIDOMDocument> domDocument;
nsCOMPtr<nsIDOMNode> contextNode;
contextNode = do_QueryInterface(aContextElement);
contextNode->GetOwnerDocument(getter_AddRefs(domDocument));
document = do_QueryInterface(domDocument);
NS_ENSURE_TRUE(document, NS_ERROR_NOT_AVAILABLE);
// stop scripts
nsRefPtr<nsScriptLoader> loader;
bool scripts_enabled = false;
if (document) {
loader = document->ScriptLoader();
scripts_enabled = loader->GetEnabled();
}
if (scripts_enabled) {
loader->SetEnabled(false);
}
// Wrap things in a div or body for parsing, but it won't show up in
// the fragment.
nsAutoTArray<nsString, 2> tagStack;
nsCAutoString base, spec;
if (aIsXML) {
// XHTML
if (aBaseURI) {
base.Append(NS_LITERAL_CSTRING(XHTML_DIV_TAG));
base.Append(NS_LITERAL_CSTRING(" xml:base=\""));
aBaseURI->GetSpec(spec);
// nsEscapeHTML is good enough, because we only need to get
// quotes, ampersands, and angle brackets
char* escapedSpec = nsEscapeHTML(spec.get());
if (escapedSpec)
base += escapedSpec;
NS_Free(escapedSpec);
base.Append(NS_LITERAL_CSTRING("\""));
tagStack.AppendElement(NS_ConvertUTF8toUTF16(base));
} else {
tagStack.AppendElement(NS_LITERAL_STRING(XHTML_DIV_TAG));
}
}
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIContent> fragment;
if (aIsXML) {
rv = nsContentUtils::ParseFragmentXML(aFragment,
document,
tagStack,
true,
aReturn);
fragment = do_QueryInterface(*aReturn);
} else {
NS_NewDocumentFragment(aReturn,
document->NodeInfoManager());
fragment = do_QueryInterface(*aReturn);
rv = nsContentUtils::ParseFragmentHTML(aFragment,
fragment,
nsGkAtoms::body,
kNameSpaceID_XHTML,
false,
true);
// Now, set the base URI on all subtree roots.
if (aBaseURI) {
aBaseURI->GetSpec(spec);
nsAutoString spec16;
CopyUTF8toUTF16(spec, spec16);
nsIContent* node = fragment->GetFirstChild();
while (node) {
if (node->IsElement()) {
node->SetAttr(kNameSpaceID_XML,
nsGkAtoms::base,
nsGkAtoms::xml,
spec16,
false);
}
node = node->GetNextSibling();
}
}
}
if (fragment) {
nsTreeSanitizer sanitizer(false, false);
sanitizer.Sanitize(fragment);
}
}
if (scripts_enabled)
loader->SetEnabled(true);
return rv;
}