parser/html/nsHtml5DocumentBuilder.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=2 sw=2 et tw=78: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsHtml5DocumentBuilder.h"
   8
   9 #include "mozilla/dom/ScriptLoader.h"
  10 #include "mozilla/dom/LinkStyle.h"
  11 #include "nsNameSpaceManager.h"
  12
  13 using mozilla::dom::LinkStyle;
  14
  15 NS_IMPL_CYCLE_COLLECTION_INHERITED(nsHtml5DocumentBuilder, nsContentSink,
  16                                    mOwnedElements)
  17
  18 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsHtml5DocumentBuilder)
  19 NS_INTERFACE_MAP_END_INHERITING(nsContentSink)
  20
  21 NS_IMPL_ADDREF_INHERITED(nsHtml5DocumentBuilder, nsContentSink)
  22 NS_IMPL_RELEASE_INHERITED(nsHtml5DocumentBuilder, nsContentSink)
  23
  24 nsHtml5DocumentBuilder::nsHtml5DocumentBuilder(bool aRunsToCompletion)
  25     : mBroken(NS_OK), mFlushState(eHtml5FlushState::eNotFlushing) {
  26   mRunsToCompletion = aRunsToCompletion;
  27 }
  28
  29 nsresult nsHtml5DocumentBuilder::Init(mozilla::dom::Document* aDoc,
  30                                       nsIURI* aURI, nsISupports* aContainer,
  31                                       nsIChannel* aChannel) {
  32   return nsContentSink::Init(aDoc, aURI, aContainer, aChannel);
  33 }
  34
  35 nsHtml5DocumentBuilder::~nsHtml5DocumentBuilder() {}
  36
  37 nsresult nsHtml5DocumentBuilder::MarkAsBroken(nsresult aReason) {
  38   mBroken = aReason;
  39   return aReason;
  40 }
  41
  42 void nsHtml5DocumentBuilder::SetDocumentCharsetAndSource(
  43     NotNull<const Encoding*> aEncoding, int32_t aCharsetSource) {
  44   if (mDocument) {
  45     mDocument->SetDocumentCharacterSetSource(aCharsetSource);
  46     mDocument->SetDocumentCharacterSet(aEncoding);
  47   }
  48 }
  49
  50 void nsHtml5DocumentBuilder::UpdateStyleSheet(nsIContent* aElement) {
  51   auto* linkStyle = LinkStyle::FromNode(*aElement);
  52   if (!linkStyle) {
  53     MOZ_ASSERT(nsNameSpaceManager::GetInstance()->mSVGDisabled,
  54                "Node didn't QI to style, but SVG wasn't disabled.");
  55     return;
  56   }
  57
  58   // Break out of the doc update created by Flush() to zap a runnable
  59   // waiting to call UpdateStyleSheet without the right observer
  60   EndDocUpdate();
  61
  62   if (MOZ_UNLIKELY(!mParser)) {
  63     // EndDocUpdate ran stuff that called nsIParser::Terminate()
  64     return;
  65   }
  66
  67   linkStyle->SetEnableUpdates(true);
  68
  69   auto updateOrError =
  70       linkStyle->UpdateStyleSheet(mRunsToCompletion ? nullptr : this);
  71
  72   if (updateOrError.isOk() && updateOrError.unwrap().ShouldBlock() &&
  73       !mRunsToCompletion) {
  74     ++mPendingSheetCount;
  75     mScriptLoader->AddParserBlockingScriptExecutionBlocker();
  76   }
  77
  78   // Re-open update
  79   BeginDocUpdate();
  80 }
  81
  82 void nsHtml5DocumentBuilder::SetDocumentMode(nsHtml5DocumentMode m) {
  83   nsCompatibility mode = eCompatibility_NavQuirks;
  84   switch (m) {
  85     case STANDARDS_MODE:
  86       mode = eCompatibility_FullStandards;
  87       break;
  88     case ALMOST_STANDARDS_MODE:
  89       mode = eCompatibility_AlmostStandards;
  90       break;
  91     case QUIRKS_MODE:
  92       mode = eCompatibility_NavQuirks;
  93       break;
  94   }
  95   mDocument->SetCompatibilityMode(mode);
  96 }
  97
  98 // nsContentSink overrides
  99
 100 void nsHtml5DocumentBuilder::UpdateChildCounts() {
 101   // No-op
 102 }
 103
 104 nsresult nsHtml5DocumentBuilder::FlushTags() { return NS_OK; }