Source/core/platform/Prerender.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"
#include "core/platform/Prerender.h"

#include "core/platform/PrerenderClient.h"
#include "public/platform/WebPrerender.h"
#include "public/platform/WebPrerenderingSupport.h"

namespace WebCore {

PassRefPtr<Prerender> Prerender::create(PrerenderClient* client, const KURL& url, const String& referrer, ReferrerPolicy policy)
{
    return adoptRef(new Prerender(client, url, referrer, policy));
}

Prerender::Prerender(PrerenderClient* client, const KURL& url, const String& referrer, ReferrerPolicy policy)
    : m_client(client)
    , m_url(url)
    , m_referrer(referrer)
    , m_referrerPolicy(policy)
    , m_isActive(false)
{
}

Prerender::~Prerender()
{
}

void Prerender::removeClient()
{
    m_client = 0;
}

void Prerender::add()
{
    ASSERT(!m_isActive);
    m_isActive = true;
    WebKit::WebPrerenderingSupport* platform = WebKit::WebPrerenderingSupport::current();
    if (!platform)
        return;
    platform->add(WebKit::WebPrerender(this));
}

void Prerender::cancel()
{
    // The LinkLoader and the Document (via Prerenderer) share ownership of
    // the Prerender, so it may have been abandoned by the Prerenderer and
    // then later canceled by the LinkLoader.
    if (!m_isActive)
        return;
    m_isActive = false;
    WebKit::WebPrerenderingSupport* platform = WebKit::WebPrerenderingSupport::current();
    if (!platform)
        return;
    platform->cancel(WebKit::WebPrerender(this));
}

void Prerender::abandon()
{
    // The LinkLoader and the Document (via Prerenderer) share ownership of
    // the Prerender, so it may have been canceled by the LinkLoader and
    // then later abandoned by the Prerenderer.
    if (!m_isActive)
        return;
    m_isActive = false;
    WebKit::WebPrerenderingSupport* platform = WebKit::WebPrerenderingSupport::current();
    if (!platform)
        return;
    platform->abandon(WebKit::WebPrerender(this));
}

void Prerender::suspend()
{
    abandon();
}

void Prerender::resume()
{
    add();
}

void Prerender::didStartPrerender()
{
    if (m_client)
        m_client->didStartPrerender();
}

void Prerender::didStopPrerender()
{
    if (m_client)
        m_client->didStopPrerender();
}

void Prerender::didSendLoadForPrerender()
{
    if (m_client)
        m_client->didSendLoadForPrerender();
}

void Prerender::didSendDOMContentLoadedForPrerender()
{
    if (m_client)
        m_client->didSendDOMContentLoadedForPrerender();
}

}