wmlimageloader.cpp

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C++ 代码 · 共 83 行

/**
 * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
 *
 * 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 "config.h"

#if ENABLE(WML)
#include "WMLImageLoader.h"

#include "CachedImage.h"
#include "CSSHelper.h"
#include "HTMLNames.h"
#include "WMLImageElement.h"
#include "WMLNames.h"

namespace WebCore {

using namespace WMLNames;

WMLImageLoader::WMLImageLoader(WMLImageElement* element)
    : ImageLoader(element)
{
}

WMLImageLoader::~WMLImageLoader()
{
}

void WMLImageLoader::dispatchLoadEvent()
{
    // WML doesn't fire any events.
    if (haveFiredLoadEvent())
        return;

    setHaveFiredLoadEvent(true);
}

String WMLImageLoader::sourceURI(const AtomicString& attr) const
{
    return parseURL(KURL(element()->baseURI(), attr).string());
}

void WMLImageLoader::notifyFinished(CachedResource* image)
{
    ImageLoader::notifyFinished(image);

    if (!image->errorOccurred())
        return;

    WMLImageElement* imageElement = static_cast<WMLImageElement*>(element());
    ASSERT(imageElement);

    // Loading both 'localsrc' and 'src' failed. Ignore this image.
    if (imageElement->useFallbackAttribute())
        return;

    if (!imageElement->hasAttribute(localsrcAttr) && !imageElement->hasAttribute(HTMLNames::srcAttr))
        return;

    imageElement->setUseFallbackAttribute(true);
    updateFromElementIgnoringPreviousError();
}

}

#endif