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      1 /*
      2  * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 1999 Antti Koivisto (koivisto (at) kde.org)
      4  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 #include "core/html/HTMLImageLoader.h"
     24 
     25 #include "core/HTMLNames.h"
     26 #include "core/dom/Element.h"
     27 #include "core/events/Event.h"
     28 #include "core/fetch/ImageResource.h"
     29 #include "core/html/HTMLImageElement.h"
     30 #include "core/html/HTMLObjectElement.h"
     31 #include "core/html/parser/HTMLParserIdioms.h"
     32 #include "platform/Logging.h"
     33 
     34 namespace blink {
     35 
     36 HTMLImageLoader::HTMLImageLoader(Element* node)
     37     : ImageLoader(node)
     38 {
     39 }
     40 
     41 HTMLImageLoader::~HTMLImageLoader()
     42 {
     43 }
     44 
     45 void HTMLImageLoader::dispatchLoadEvent()
     46 {
     47     WTF_LOG(Timers, "HTMLImageLoader::dispatchLoadEvent %p", this);
     48 
     49     // HTMLVideoElement uses this class to load the poster image, but it should not fire events for loading or failure.
     50     if (isHTMLVideoElement(*element()))
     51         return;
     52 
     53     bool errorOccurred = image()->errorOccurred();
     54     if (isHTMLObjectElement(*element()) && !errorOccurred)
     55         errorOccurred = (image()->response().httpStatusCode() >= 400); // An <object> considers a 404 to be an error and should fire onerror.
     56     element()->dispatchEvent(Event::create(errorOccurred ? EventTypeNames::error : EventTypeNames::load));
     57 }
     58 
     59 String HTMLImageLoader::sourceURI(const AtomicString& attr) const
     60 {
     61     return stripLeadingAndTrailingHTMLSpaces(attr);
     62 }
     63 
     64 void HTMLImageLoader::notifyFinished(Resource*)
     65 {
     66     ImageResource* cachedImage = image();
     67 
     68     RefPtrWillBeRawPtr<Element> element = this->element();
     69     ImageLoader::notifyFinished(cachedImage);
     70 
     71     bool loadError = cachedImage->errorOccurred() || cachedImage->response().httpStatusCode() >= 400;
     72 
     73     if (loadError && isHTMLObjectElement(*element))
     74         toHTMLObjectElement(element)->renderFallbackContent();
     75 }
     76 
     77 }
     78