parser/html/nsHtml5Module.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsHtml5AttributeName.h"
   6 #include "nsHtml5ElementName.h"
   7 #include "nsHtml5HtmlAttributes.h"
   8 #include "nsHtml5NamedCharacters.h"
   9 #include "nsHtml5Portability.h"
  10 #include "nsHtml5StackNode.h"
  11 #include "nsHtml5Tokenizer.h"
  12 #include "nsHtml5TreeBuilder.h"
  13 #include "nsHtml5UTF16Buffer.h"
  14 #include "nsHtml5Module.h"
  15 #include "nsIObserverService.h"
  16 #include "nsIServiceManager.h"
  17 #include "mozilla/Services.h"
  18 #include "mozilla/Preferences.h"
  19 #include "mozilla/Attributes.h"
  20
  21 using namespace mozilla;
  22
  23 // static
  24 bool nsHtml5Module::sOffMainThread = true;
  25 nsIThread* nsHtml5Module::sStreamParserThread = nullptr;
  26 nsIThread* nsHtml5Module::sMainThread = nullptr;
  27
  28 // static
  29 void
  30 nsHtml5Module::InitializeStatics()
  31 {
  32   Preferences::AddBoolVarCache(&sOffMainThread, "html5.offmainthread");
  33   nsHtml5Atoms::AddRefAtoms();
  34   nsHtml5AttributeName::initializeStatics();
  35   nsHtml5ElementName::initializeStatics();
  36   nsHtml5HtmlAttributes::initializeStatics();
  37   nsHtml5NamedCharacters::initializeStatics();
  38   nsHtml5Portability::initializeStatics();
  39   nsHtml5StackNode::initializeStatics();
  40   nsHtml5Tokenizer::initializeStatics();
  41   nsHtml5TreeBuilder::initializeStatics();
  42   nsHtml5UTF16Buffer::initializeStatics();
  43   nsHtml5StreamParser::InitializeStatics();
  44   nsHtml5TreeOpExecutor::InitializeStatics();
  45 #ifdef DEBUG
  46   sNsHtml5ModuleInitialized = true;
  47 #endif
  48 }
  49
  50 // static
  51 void
  52 nsHtml5Module::ReleaseStatics()
  53 {
  54 #ifdef DEBUG
  55   sNsHtml5ModuleInitialized = false;
  56 #endif
  57   nsHtml5AttributeName::releaseStatics();
  58   nsHtml5ElementName::releaseStatics();
  59   nsHtml5HtmlAttributes::releaseStatics();
  60   nsHtml5NamedCharacters::releaseStatics();
  61   nsHtml5Portability::releaseStatics();
  62   nsHtml5StackNode::releaseStatics();
  63   nsHtml5Tokenizer::releaseStatics();
  64   nsHtml5TreeBuilder::releaseStatics();
  65   nsHtml5UTF16Buffer::releaseStatics();
  66   NS_IF_RELEASE(sStreamParserThread);
  67   NS_IF_RELEASE(sMainThread);
  68 }
  69
  70 // static
  71 already_AddRefed<nsIParser>
  72 nsHtml5Module::NewHtml5Parser()
  73 {
  74   NS_ABORT_IF_FALSE(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
  75   nsIParser* rv = static_cast<nsIParser*> (new nsHtml5Parser());
  76   NS_ADDREF(rv);
  77   return rv;
  78 }
  79
  80 // static
  81 nsresult
  82 nsHtml5Module::Initialize(nsIParser* aParser, nsIDocument* aDoc, nsIURI* aURI, nsISupports* aContainer, nsIChannel* aChannel)
  83 {
  84   NS_ABORT_IF_FALSE(sNsHtml5ModuleInitialized, "nsHtml5Module not initialized.");
  85   nsHtml5Parser* parser = static_cast<nsHtml5Parser*> (aParser);
  86   return parser->Initialize(aDoc, aURI, aContainer, aChannel);
  87 }
  88
  89 class nsHtml5ParserThreadTerminator MOZ_FINAL : public nsIObserver
  90 {
  91   public:
  92     NS_DECL_ISUPPORTS
  93     nsHtml5ParserThreadTerminator(nsIThread* aThread)
  94       : mThread(aThread)
  95     {}
  96     NS_IMETHODIMP Observe(nsISupports *, const char *topic, const PRUnichar *)
  97     {
  98       NS_ASSERTION(!strcmp(topic, "xpcom-shutdown-threads"),
  99                    "Unexpected topic");
 100       if (mThread) {
 101         mThread->Shutdown();
 102         mThread = nullptr;
 103       }
 104       return NS_OK;
 105     }
 106   private:
 107     nsCOMPtr<nsIThread> mThread;
 108 };
 109
 110 NS_IMPL_ISUPPORTS1(nsHtml5ParserThreadTerminator, nsIObserver)
 111
 112 // static
 113 nsIThread*
 114 nsHtml5Module::GetStreamParserThread()
 115 {
 116   if (sOffMainThread) {
 117     if (!sStreamParserThread) {
 118       NS_NewNamedThread("HTML5 Parser", &sStreamParserThread);
 119       NS_ASSERTION(sStreamParserThread, "Thread creation failed!");
 120       nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
 121       NS_ASSERTION(os, "do_GetService failed");
 122       os->AddObserver(new nsHtml5ParserThreadTerminator(sStreamParserThread),
 123                       "xpcom-shutdown-threads",
 124                       false);
 125     }
 126     return sStreamParserThread;
 127   }
 128   if (!sMainThread) {
 129     NS_GetMainThread(&sMainThread);
 130     NS_ASSERTION(sMainThread, "Main thread getter failed");
 131   }
 132   return sMainThread;
 133 }
 134
 135 #ifdef DEBUG
 136 bool nsHtml5Module::sNsHtml5ModuleInitialized = false;
 137 #endif