dom/base/nsScriptElement.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsScriptElement.h"
   7 #include "mozilla/BasicEvents.h"
   8 #include "mozilla/EventDispatcher.h"
   9 #include "mozilla/dom/Element.h"
  10 #include "nsContentUtils.h"
  11 #include "nsPresContext.h"
  12 #include "nsScriptLoader.h"
  13 #include "nsIParser.h"
  14 #include "nsAutoPtr.h"
  15 #include "nsGkAtoms.h"
  16 #include "nsContentSink.h"
  17
  18 using namespace mozilla;
  19 using namespace mozilla::dom;
  20
  21 NS_IMETHODIMP
  22 nsScriptElement::ScriptAvailable(nsresult aResult,
  23                                  nsIScriptElement *aElement,
  24                                  bool aIsInline,
  25                                  nsIURI *aURI,
  26                                  int32_t aLineNo)
  27 {
  28   if (!aIsInline && NS_FAILED(aResult)) {
  29     return FireErrorEvent();
  30   }
  31   return NS_OK;
  32 }
  33
  34 /* virtual */ nsresult
  35 nsScriptElement::FireErrorEvent()
  36 {
  37   nsCOMPtr<nsIContent> cont =
  38     do_QueryInterface((nsIScriptElement*) this);
  39
  40   return nsContentUtils::DispatchTrustedEvent(cont->OwnerDoc(),
  41                                               cont,
  42                                               NS_LITERAL_STRING("error"),
  43                                               false /* bubbles */,
  44                                               false /* cancelable */);
  45 }
  46
  47 NS_IMETHODIMP
  48 nsScriptElement::ScriptEvaluated(nsresult aResult,
  49                                  nsIScriptElement *aElement,
  50                                  bool aIsInline)
  51 {
  52   nsresult rv = NS_OK;
  53   if (!aIsInline) {
  54     nsCOMPtr<nsIContent> cont =
  55       do_QueryInterface((nsIScriptElement*) this);
  56
  57     nsRefPtr<nsPresContext> presContext =
  58       nsContentUtils::GetContextForContent(cont);
  59
  60     nsEventStatus status = nsEventStatus_eIgnore;
  61     uint32_t type = NS_SUCCEEDED(aResult) ? NS_LOAD : NS_LOAD_ERROR;
  62     WidgetEvent event(true, type);
  63     // Load event doesn't bubble.
  64     event.mFlags.mBubbles = (type != NS_LOAD);
  65
  66     EventDispatcher::Dispatch(cont, presContext, &event, nullptr, &status);
  67   }
  68
  69   return rv;
  70 }
  71
  72 void
  73 nsScriptElement::CharacterDataChanged(nsIDocument *aDocument,
  74                                       nsIContent* aContent,
  75                                       CharacterDataChangeInfo* aInfo)
  76 {
  77   MaybeProcessScript();
  78 }
  79
  80 void
  81 nsScriptElement::AttributeChanged(nsIDocument* aDocument,
  82                                   Element* aElement,
  83                                   int32_t aNameSpaceID,
  84                                   nsIAtom* aAttribute,
  85                                   int32_t aModType)
  86 {
  87   MaybeProcessScript();
  88 }
  89
  90 void
  91 nsScriptElement::ContentAppended(nsIDocument* aDocument,
  92                                  nsIContent* aContainer,
  93                                  nsIContent* aFirstNewContent,
  94                                  int32_t aNewIndexInContainer)
  95 {
  96   MaybeProcessScript();
  97 }
  98
  99 void
 100 nsScriptElement::ContentInserted(nsIDocument *aDocument,
 101                                  nsIContent* aContainer,
 102                                  nsIContent* aChild,
 103                                  int32_t aIndexInContainer)
 104 {
 105   MaybeProcessScript();
 106 }
 107
 108 bool
 109 nsScriptElement::MaybeProcessScript()
 110 {
 111   nsCOMPtr<nsIContent> cont =
 112     do_QueryInterface((nsIScriptElement*) this);
 113
 114   NS_ASSERTION(cont->DebugGetSlots()->mMutationObservers.Contains(this),
 115                "You forgot to add self as observer");
 116
 117   if (mAlreadyStarted || !mDoneAddingChildren ||
 118       !cont->GetCrossShadowCurrentDoc() || mMalformed || !HasScriptContent()) {
 119     return false;
 120   }
 121
 122   FreezeUriAsyncDefer();
 123
 124   mAlreadyStarted = true;
 125
 126   nsIDocument* ownerDoc = cont->OwnerDoc();
 127   nsCOMPtr<nsIParser> parser = ((nsIScriptElement*) this)->GetCreatorParser();
 128   if (parser) {
 129     nsCOMPtr<nsIContentSink> sink = parser->GetContentSink();
 130     if (sink) {
 131       nsCOMPtr<nsIDocument> parserDoc = do_QueryInterface(sink->GetTarget());
 132       if (ownerDoc != parserDoc) {
 133         // Willful violation of HTML5 as of 2010-12-01
 134         return false;
 135       }
 136     }
 137   }
 138
 139   nsRefPtr<nsScriptLoader> loader = ownerDoc->ScriptLoader();
 140   return loader->ProcessScriptElement(this);
 141 }