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() = default;
  36
  37 nsresult nsHtml5DocumentBuilder::MarkAsBroken(nsresult aReason) {
  38   mBroken = aReason;
  39   return aReason;
  40 }
  41
  42 void nsHtml5DocumentBuilder::UpdateStyleSheet(nsIContent* aElement) {
  43   auto* linkStyle = LinkStyle::FromNode(*aElement);
  44   if (!linkStyle) {
  45     MOZ_ASSERT(nsNameSpaceManager::GetInstance()->mSVGDisabled,
  46                "Node didn't QI to style, but SVG wasn't disabled.");
  47     return;
  48   }
  49
  50   auto updateOrError = linkStyle->EnableUpdatesAndUpdateStyleSheet(
  51       mRunsToCompletion ? nullptr : this);
  52
  53   if (updateOrError.isOk() && updateOrError.unwrap().ShouldBlock() &&
  54       !mRunsToCompletion) {
  55     ++mPendingSheetCount;
  56     mScriptLoader->AddParserBlockingScriptExecutionBlocker();
  57   }
  58 }
  59
  60 void nsHtml5DocumentBuilder::SetDocumentMode(nsHtml5DocumentMode m) {
  61   nsCompatibility mode = eCompatibility_NavQuirks;
  62   const char* errMsgId = nullptr;
  63
  64   switch (m) {
  65     case STANDARDS_MODE:
  66       mode = eCompatibility_FullStandards;
  67       break;
  68     case ALMOST_STANDARDS_MODE:
  69       mode = eCompatibility_AlmostStandards;
  70       errMsgId = "errAlmostStandardsDoctypeVerbose";
  71       break;
  72     case QUIRKS_MODE:
  73       mode = eCompatibility_NavQuirks;
  74       errMsgId = "errQuirkyDoctypeVerbose";
  75       break;
  76   }
  77   mDocument->SetCompatibilityMode(mode);
  78
  79   if (errMsgId && !mDocument->IsLoadedAsData()) {
  80     nsCOMPtr<nsIURI> docURI = mDocument->GetDocumentURI();
  81     bool isData = false;
  82     docURI->SchemeIs("data", &isData);
  83     bool isHttp = false;
  84     docURI->SchemeIs("http", &isHttp);
  85     bool isHttps = false;
  86     docURI->SchemeIs("https", &isHttps);
  87
  88     nsCOMPtr<nsIPrincipal> principal = mDocument->GetPrincipal();
  89     if (principal->GetIsNullPrincipal() && !isData && !isHttp && !isHttps) {
  90       // Don't normally warn for null principals. It may well be internal
  91       // documents for which the warning is not applicable.
  92       return;
  93     }
  94
  95     nsContentUtils::ReportToConsole(
  96         nsIScriptError::warningFlag, "HTML_PARSER__DOCTYPE"_ns, mDocument,
  97         nsContentUtils::eHTMLPARSER_PROPERTIES, errMsgId);
  98   }
  99 }
 100
 101 // nsContentSink overrides
 102
 103 void nsHtml5DocumentBuilder::UpdateChildCounts() {
 104   // No-op
 105 }
 106
 107 nsresult nsHtml5DocumentBuilder::FlushTags() { return NS_OK; }