Add loadend event when finishing loading image

third_party/WebKit/Source/core/html/HTMLImageLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "core/html/HTMLImageLoader.h"
 
 #include "core/HTMLNames.h"
 #include "core/dom/Element.h"
 #include "core/events/Event.h"
+#include "core/events/EventSender.h"
 #include "core/fetch/ImageResource.h"
 #include "core/fetch/ResourceLoadingLog.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLObjectElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
+static ImageEventSender& loadendEventSender()
+{
+    DEFINE_STATIC_LOCAL(ImageEventSender, sender, (ImageEventSender::create(EventTypeNames::loadend)));
+    return sender;
+}
+
+void HTMLImageLoader::dispatchPendingLoadendEvents()
+{
+    loadendEventSender().dispatchPendingEvents();
+}
+
 HTMLImageLoader::HTMLImageLoader(Element* element)
     : ImageLoader(element)
 {
 }
 
 HTMLImageLoader::~HTMLImageLoader()
 {
 }
 
 void HTMLImageLoader::dispatchLoadEvent()
 {
     RESOURCE_LOADING_DVLOG(1) << "HTMLImageLoader::dispatchLoadEvent " << this;
 
     // HTMLVideoElement uses this class to load the poster image, but it should not fire events for loading or failure.
     if (isHTMLVideoElement(*element()))
         return;
 
     bool errorOccurred = image()->errorOccurred();
     if (isHTMLObjectElement(*element()) && !errorOccurred)
         errorOccurred = (image()->response().httpStatusCode() >= 400); // An <object> considers a 404 to be an error and should fire onerror.
     element()->dispatchEvent(Event::create(errorOccurred ? EventTypeNames::error : EventTypeNames::load));
 }
 
+void HTMLImageLoader::dispatchLoadendEvent()
+{
+    RESOURCE_LOADING_DVLOG(1) << "HTMLImageLoader::dispatchLoadendEvent " << this;
+
+    if (isHTMLImageElement(*element()))
+        element()->dispatchEvent(Event::create(EventTypeNames::loadend));
+}
+
+void HTMLImageLoader::dispatchLoadendEventSoon()
+{
+    RESOURCE_LOADING_DVLOG(1) << "HTMLImageLoader::dispatchLoadendEventSoon " << this;
+
+    if (isHTMLImageElement(*element()))
+        loadendEventSender().dispatchEventSoon(this);
+}
+
 static void loadFallbackContentForElement(Element* element)
 {
     if (isHTMLImageElement(element))
         toHTMLImageElement(element)->ensureFallbackContent();
     else if (isHTMLInputElement(element))
         toHTMLInputElement(element)->ensureFallbackContent();
 }
 
 void HTMLImageLoader::noImageResourceToLoad()
 {
@@ skipping 18 matching lines @@
 
     if (isHTMLInputElement(*element)) {
         if (loadError)
             ensureFallbackContent();
         else
             toHTMLInputElement(element)->ensurePrimaryContent();
     }
 
     if ((loadError || cachedImage->response().httpStatusCode() >= 400) && isHTMLObjectElement(*element))
         toHTMLObjectElement(element)->renderFallbackContent();
+    dispatchLoadendEventSoon();
 }
 
 void HTMLImageLoader::ensureFallbackContent()
 {
     loadFallbackContentForElement(element());
 }
 
 } // namespace blink