/*

 * Copyright (C) 2009, 2010 Apple Inc. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "WebProcess.h"

#include "InjectedBundle.h"

#if PLATFORM(MAC)

#include "MachPort.h"

#endif

#include "RunLoop.h"

#include "WebCoreArgumentCoders.h"

#include "WebFrame.h"

#include "WebPage.h"

#include "WebPlatformStrategies.h"

#include "WebPreferencesStore.h"

#include "WebProcessMessageKinds.h"

#include <WebCore/ApplicationCacheStorage.h>

#include <wtf/PassRefPtr.h>

#ifndef NDEBUG

#include <WebCore/Cache.h>

#include <WebCore/GCController.h>

#endif

using namespace WebCore;

namespace WebKit {

WebProcess& WebProcess::shared()

{

    static WebProcess& process = *new WebProcess;

    return process;

}

WebProcess::WebProcess()

    : m_inDidClose(false)

#if USE(ACCELERATED_COMPOSITING) && PLATFORM(MAC)

    , m_compositingRenderServerPort(MACH_PORT_NULL)

#endif

{

#if USE(PLATFORM_STRATEGIES)

    // Initialize our platform strategies.

    WebPlatformStrategies::initialize();

#endif // USE(PLATFORM_STRATEGIES)

}

void WebProcess::initialize(CoreIPC::Connection::Identifier serverIdentifier, RunLoop* runLoop)

{

    ASSERT(!m_connection);

    m_connection = CoreIPC::Connection::createClientConnection(serverIdentifier, this, runLoop);

    m_connection->open();

    m_runLoop = runLoop;

}

#if ENABLE(WEB_PROCESS_SANDBOX)

void WebProcess::loadInjectedBundle(const String& path, const String& token)

#else

void WebProcess::loadInjectedBundle(const String& path)

#endif

{

    ASSERT(m_pageMap.isEmpty());

    ASSERT(!path.isEmpty());

    m_injectedBundle = InjectedBundle::create(path);

#if ENABLE(WEB_PROCESS_SANDBOX)

    m_injectedBundle->setSandboxToken(token);

#endif

    if (!m_injectedBundle->load()) {

        // Don't keep around the InjectedBundle reference if the load fails.

        m_injectedBundle.clear();

    }

}

void WebProcess::setApplicationCacheDirectory(const String& directory)

{

    cacheStorage().setCacheDirectory(directory);

}

void WebProcess::forwardMessageToInjectedBundle(const String& message)

{

    if (!m_injectedBundle)

        return;

    m_injectedBundle->didRecieveMessage(message);

}

WebPage* WebProcess::webPage(uint64_t pageID) const

{

    return m_pageMap.get(pageID).get();

}

WebPage* WebProcess::createWebPage(uint64_t pageID, const IntSize& viewSize, const WebPreferencesStore& store, DrawingArea::Type drawingAreaType)

{

    // It is necessary to check for page existence here since during a window.open() (or targeted

    // link) the WebPage gets created both in the synchronous handler and through the normal way. 

    std::pair<HashMap<uint64_t, RefPtr<WebPage> >::iterator, bool> result = m_pageMap.add(pageID, 0);

    if (result.second) {

        ASSERT(!result.first->second);

        result.first->second = WebPage::create(pageID, viewSize, store, drawingAreaType);

    }

    ASSERT(result.first->second);

    return result.first->second.get();

}

void WebProcess::removeWebPage(uint64_t pageID)

{

    m_pageMap.remove(pageID);

    // If we don't have any pages left, shut down.

    if (m_pageMap.isEmpty() && !m_inDidClose)

        shutdown();

}

bool WebProcess::isSeparateProcess() const

{

    // If we're running on the main run loop, we assume that we're in a separate process.

    return m_runLoop == RunLoop::main();

}

void WebProcess::shutdown()

{

    // Keep running forever if we're running in the same process.

    if (!isSeparateProcess())

        return;

#ifndef NDEBUG

    gcController().garbageCollectNow();

    cache()->setDisabled(true);

#endif

    // Invalidate our connection.

    m_connection->invalidate();

    m_connection = 0;

    m_runLoop->stop();

}

void WebProcess::didReceiveMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)

{

    if (messageID.is<CoreIPC::MessageClassWebProcess>()) {

        switch (messageID.get<WebProcessMessage::Kind>()) {

            case WebProcessMessage::LoadInjectedBundle: {

                String path;

#if ENABLE(WEB_PROCESS_SANDBOX)

                String token;

                if (!arguments->decode(CoreIPC::Out(path, token)))

                    return;

                loadInjectedBundle(path, token);

                return;

#else

                if (!arguments->decode(CoreIPC::Out(path)))

                    return;

                loadInjectedBundle(path);

                return;

#endif

            }

            case WebProcessMessage::SetApplicationCacheDirectory: {

                String directory;

                if (!arguments->decode(CoreIPC::Out(directory)))

                    return;

                setApplicationCacheDirectory(directory);

                return;

            }

            case WebProcessMessage::Create: {

                uint64_t pageID = arguments->destinationID();

                IntSize viewSize;

                WebPreferencesStore store;

                uint32_t drawingAreaType;

                if (!arguments->decode(CoreIPC::Out(viewSize, store, drawingAreaType)))

                    return;

                createWebPage(pageID, viewSize, store, static_cast<DrawingArea::Type>(drawingAreaType));

                return;

            }

            case WebProcessMessage::PostMessage: {

                String message;

                if (!arguments->decode(CoreIPC::Out(message)))

                    return;

                forwardMessageToInjectedBundle(message);

                return;

            }

#if USE(ACCELERATED_COMPOSITING) && PLATFORM(MAC)

            case WebProcessMessage::SetupAcceleratedCompositingPort: {

                CoreIPC::MachPort port;

                if (!arguments->decode(port))

                    return;

                m_compositingRenderServerPort = port.port();

                return;

            }

#endif

        }

    }

    uint64_t pageID = arguments->destinationID();

    if (!pageID)

        return;

    WebPage* page = webPage(pageID);

    if (!page)

        return;

    page->didReceiveMessage(connection, messageID, *arguments);    

}

void WebProcess::didReceiveSyncMessage(CoreIPC::Connection*, CoreIPC::MessageID, CoreIPC::ArgumentDecoder*, CoreIPC::ArgumentEncoder*)

{

    // The web process should never ever get sync messages.

    ASSERT_NOT_REACHED();

}

void WebProcess::didClose(CoreIPC::Connection*)

{

    // When running in the same process the connection will never be closed.

    ASSERT(isSeparateProcess());

#ifndef NDEBUG

    m_inDidClose = true;

    // Close all the live pages.

    Vector<RefPtr<WebPage> > pages;

    copyValuesToVector(m_pageMap, pages);

    for (size_t i = 0; i < pages.size(); ++i)

        pages[i]->close();

    pages.clear();

    gcController().garbageCollectNow();

    cache()->setDisabled(true);

#endif    

    // The UI process closed this connection, shut down.

    m_runLoop->stop();

}

} // namespace WebKit