parser/html/nsHtml5Module.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
   8  *
   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is HTML Parser C++ Translator code.
  15  *
  16  * The Initial Developer of the Original Code is
  17  * Mozilla Foundation.
  18  * Portions created by the Initial Developer are Copyright (C) 2008
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Henri Sivonen <hsivonen@iki.fi>
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
  29  * under the terms of either the GPL or the LGPL, and not to allow others to
  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
  32  * and other provisions required by the GPL or the LGPL. If you do not delete
  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include "nsContentUtils.h"
  39 #include "nsHtml5AttributeName.h"
  40 #include "nsHtml5ElementName.h"
  41 #include "nsHtml5HtmlAttributes.h"
  42 #include "nsHtml5NamedCharacters.h"
  43 #include "nsHtml5Portability.h"
  44 #include "nsHtml5StackNode.h"
  45 #include "nsHtml5Tokenizer.h"
  46 #include "nsHtml5TreeBuilder.h"
  47 #include "nsHtml5UTF16Buffer.h"
  48 #include "nsHtml5Module.h"
  49 #include "nsIObserverService.h"
  50 #include "nsIServiceManager.h"
  51 #include "mozilla/Services.h"
  52
  53 // static
  54 PRBool nsHtml5Module::sEnabled = PR_FALSE;
  55 PRBool nsHtml5Module::sOffMainThread = PR_TRUE;
  56 nsIThread* nsHtml5Module::sStreamParserThread = nsnull;
  57 nsIThread* nsHtml5Module::sMainThread = nsnull;
  58
  59 // static
  60 void
  61 nsHtml5Module::InitializeStatics()
  62 {
  63   nsContentUtils::AddBoolPrefVarCache("html5.enable", &sEnabled);
  64   nsContentUtils::AddBoolPrefVarCache("html5.offmainthread", &sOffMainThread);
  65   nsHtml5Atoms::AddRefAtoms();
  66   nsHtml5AttributeName::initializeStatics();
  67   nsHtml5ElementName::initializeStatics();
  68   nsHtml5HtmlAttributes::initializeStatics();
  69   nsHtml5NamedCharacters::initializeStatics();
  70   nsHtml5Portability::initializeStatics();
  71   nsHtml5StackNode::initializeStatics();
  72   nsHtml5Tokenizer::initializeStatics();
  73   nsHtml5TreeBuilder::initializeStatics();
  74   nsHtml5UTF16Buffer::initializeStatics();
  75   nsHtml5StreamParser::InitializeStatics();
  76 #ifdef DEBUG
  77   sNsHtml5ModuleInitialized = PR_TRUE;
  78 #endif
  79 }
  80
  81 // static
  82 void
  83 nsHtml5Module::ReleaseStatics()
  84 {
  85 #ifdef DEBUG
  86   sNsHtml5ModuleInitialized = PR_FALSE;
  87 #endif
  88   nsHtml5AttributeName::releaseStatics();
  89   nsHtml5ElementName::releaseStatics();
  90   nsHtml5HtmlAttributes::releaseStatics();
  91   nsHtml5NamedCharacters::releaseStatics();
  92   nsHtml5Portability::releaseStatics();
  93   nsHtml5StackNode::releaseStatics();
  94   nsHtml5Tokenizer::releaseStatics();
  95   nsHtml5TreeBuilder::releaseStatics();
  96   nsHtml5UTF16Buffer::releaseStatics();
  97   NS_IF_RELEASE(sStreamParserThread);
  98   NS_IF_RELEASE(sMainThread);
  99 }
 100
 101 // static
 102 already_AddRefed<nsIParser>
 103 nsHtml5Module::NewHtml5Parser()
 104 {
 105   NS_ABORT_IF_FALSE(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
 106   nsIParser* rv = static_cast<nsIParser*> (new nsHtml5Parser());
 107   NS_ADDREF(rv);
 108   return rv;
 109 }
 110
 111 // static
 112 nsresult
 113 nsHtml5Module::Initialize(nsIParser* aParser, nsIDocument* aDoc, nsIURI* aURI, nsISupports* aContainer, nsIChannel* aChannel)
 114 {
 115   NS_ABORT_IF_FALSE(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
 116   nsHtml5Parser* parser = static_cast<nsHtml5Parser*> (aParser);
 117   return parser->Initialize(aDoc, aURI, aContainer, aChannel);
 118 }
 119
 120 class nsHtml5ParserThreadTerminator : public nsIObserver
 121 {
 122   public:
 123     NS_DECL_ISUPPORTS
 124     nsHtml5ParserThreadTerminator(nsIThread* aThread)
 125       : mThread(aThread)
 126     {}
 127     NS_IMETHODIMP Observe(nsISupports *, const char *topic, const PRUnichar *)
 128     {
 129       NS_ASSERTION(!strcmp(topic, "xpcom-shutdown-threads"),
 130                    "Unexpected topic");
 131       if (mThread) {
 132         mThread->Shutdown();
 133         mThread = nsnull;
 134       }
 135       return NS_OK;
 136     }
 137   private:
 138     nsCOMPtr<nsIThread> mThread;
 139 };
 140
 141 NS_IMPL_ISUPPORTS1(nsHtml5ParserThreadTerminator, nsIObserver)
 142
 143 // static
 144 nsIThread*
 145 nsHtml5Module::GetStreamParserThread()
 146 {
 147   if (sOffMainThread) {
 148     if (!sStreamParserThread) {
 149       NS_NewThread(&sStreamParserThread);
 150       NS_ASSERTION(sStreamParserThread, "Thread creation failed!");
 151       nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
 152       NS_ASSERTION(os, "do_GetService failed");
 153       os->AddObserver(new nsHtml5ParserThreadTerminator(sStreamParserThread),
 154                       "xpcom-shutdown-threads",
 155                       PR_FALSE);
 156     }
 157     return sStreamParserThread;
 158   }
 159   if (!sMainThread) {
 160     NS_GetMainThread(&sMainThread);
 161     NS_ASSERTION(sMainThread, "Main thread getter failed");
 162   }
 163   return sMainThread;
 164 }
 165
 166 #ifdef DEBUG
 167 PRBool nsHtml5Module::sNsHtml5ModuleInitialized = PR_FALSE;
 168 #endif