image/ScriptedNotificationObserver.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  *
   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 "ScriptedNotificationObserver.h"
   8 #include "imgIScriptedNotificationObserver.h"
   9 #include "nsCycleCollectionParticipant.h"
  10 #include "nsContentUtils.h"                     // for nsAutoScriptBlocker
  11
  12 namespace mozilla {
  13 namespace image {
  14
  15 NS_IMPL_CYCLE_COLLECTION(ScriptedNotificationObserver, mInner)
  16
  17 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ScriptedNotificationObserver)
  18   NS_INTERFACE_MAP_ENTRY(imgINotificationObserver)
  19   NS_INTERFACE_MAP_ENTRY(nsISupports)
  20 NS_INTERFACE_MAP_END
  21
  22 NS_IMPL_CYCLE_COLLECTING_ADDREF(ScriptedNotificationObserver)
  23 NS_IMPL_CYCLE_COLLECTING_RELEASE(ScriptedNotificationObserver)
  24
  25 ScriptedNotificationObserver::ScriptedNotificationObserver(
  26     imgIScriptedNotificationObserver* aInner)
  27 : mInner(aInner)
  28 { }
  29
  30 NS_IMETHODIMP
  31 ScriptedNotificationObserver::Notify(imgIRequest* aRequest,
  32                                      int32_t aType,
  33                                      const nsIntRect* /*aUnused*/)
  34 {
  35   // For now, we block (other) scripts from running to preserve the historical
  36   // behavior from when ScriptedNotificationObserver::Notify was called as part
  37   // of the observers list in nsImageLoadingContent::Notify. Now each
  38   // ScriptedNotificationObserver has its own imgRequestProxy and thus gets
  39   // Notify called directly by imagelib.
  40   nsAutoScriptBlocker scriptBlocker;
  41
  42   if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
  43     return mInner->SizeAvailable(aRequest);
  44   }
  45   if (aType == imgINotificationObserver::FRAME_UPDATE) {
  46     return mInner->FrameUpdate(aRequest);
  47   }
  48   if (aType == imgINotificationObserver::FRAME_COMPLETE) {
  49     return mInner->FrameComplete(aRequest);
  50   }
  51   if (aType == imgINotificationObserver::DECODE_COMPLETE) {
  52     return mInner->DecodeComplete(aRequest);
  53   }
  54   if (aType == imgINotificationObserver::LOAD_COMPLETE) {
  55     return mInner->LoadComplete(aRequest);
  56   }
  57   if (aType == imgINotificationObserver::DISCARD) {
  58     return mInner->Discard(aRequest);
  59   }
  60   if (aType == imgINotificationObserver::IS_ANIMATED) {
  61     return mInner->IsAnimated(aRequest);
  62   }
  63   if (aType == imgINotificationObserver::HAS_TRANSPARENCY) {
  64     return mInner->HasTransparency(aRequest);
  65   }
  66   return NS_OK;
  67 }
  68
  69 } // namespace image
  70 } // namespace mozilla