/*
 * Copyright (c) 2013, Opera Software ASA. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Opera Software ASA nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 */

#include "config.h"
#include "core/page/ScopedSinglePageLoadDeferrer.h"

#include "core/dom/Document.h"
#include "core/dom/DocumentParser.h"
#include "core/dom/ScriptRunner.h"
#include "core/frame/LocalFrame.h"
#include "core/page/Page.h"
#include "core/page/Page.h"
#include <wtf/HashSet.h>

namespace blink {

using namespace std;


ScopedSinglePageLoadDeferrer::ScopedSinglePageLoadDeferrer(Page* page) {
    if (!page->defersLoading()) {
        if (page->mainFrame()->isLocalFrame()) {
            m_deferredFrame = page->deprecatedLocalMainFrame();

            // Ensure that we notify the client if the initial empty document is accessed before
            // showing anything modal, to prevent spoofs while the modal window or sheet is visible.
            page->deprecatedLocalMainFrame()->loader().notifyIfInitialDocumentAccessed();
        }

        // This code is not logically part of load deferring, but we do not want JS code executed
        // beneath modal windows or sheets, which is exactly when ScopedSinglePageLoadDeferrer is
        // used.
        for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
            if (frame->isLocalFrame())
              toLocalFrame(frame)->document()->suspendScheduledTasks(WillDeferLoading);
        }

        page->setDefersLoading(true);
    }
}

ScopedSinglePageLoadDeferrer::~ScopedSinglePageLoadDeferrer()
{
    if (m_deferredFrame.get()) {
        if (Page* page = m_deferredFrame->page()) {
            page->setDefersLoading(false);

            for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext())
              if (frame->isLocalFrame())
                  toLocalFrame(frame)->document()->resumeScheduledTasks();
        }
    }
}

} // namespace blink
