WebCore/html/HTMLImageLoader.cpp

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
   4  * Copyright (C) 2004, 2005, 2006, 2007 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 "HTMLImageLoader.h"
  24
  25 #include "CSSHelper.h"
  26 #include "CachedImage.h"
  27 #include "Element.h"
  28 #include "Event.h"
  29 #include "EventNames.h"
  30 #include "HTMLNames.h"
  31 #include "HTMLObjectElement.h"
  32
  33 namespace WebCore {
  34
  35 HTMLImageLoader::HTMLImageLoader(Element* node)
  36     : ImageLoader(node)
  37 {
  38 }
  39
  40 HTMLImageLoader::~HTMLImageLoader()
  41 {
  42 }
  43
  44 void HTMLImageLoader::dispatchLoadEvent()
  45 {
  46     bool errorOccurred = image()->errorOccurred();
  47     if (!errorOccurred && image()->httpStatusCodeErrorOccurred())
  48         errorOccurred = element()->hasTagName(HTMLNames::objectTag); // An <object> considers a 404 to be an error and should fire onerror.
  49     element()->dispatchEvent(Event::create(errorOccurred ? eventNames().errorEvent : eventNames().loadEvent, false, false));
  50 }
  51
  52 String HTMLImageLoader::sourceURI(const AtomicString& attr) const
  53 {
  54     return deprecatedParseURL(attr);
  55 }
  56
  57 void HTMLImageLoader::notifyFinished(CachedResource*)
  58 {
  59     CachedImage* cachedImage = image();
  60
  61     Element* elem = element();
  62     ImageLoader::notifyFinished(cachedImage);
  63
  64     if ((cachedImage->errorOccurred() || cachedImage->httpStatusCodeErrorOccurred()) && elem->hasTagName(HTMLNames::objectTag))
  65         static_cast<HTMLObjectElement*>(elem)->renderFallbackContent();
  66 }
  67
  68 }