WebKit2/UIProcess/WebPageProxy.cpp

/*
 * Copyright (C) 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 "WebPageProxy.h"

#include "DrawingAreaProxy.h"
#include "FindIndicator.h"
#include "MessageID.h"
#include "NativeWebKeyboardEvent.h"
#include "PageClient.h"
#include "StringPairVector.h"
#include "WKContextPrivate.h"
#include "WebBackForwardList.h"
#include "WebBackForwardListItem.h"
#include "WebCertificateInfo.h"
#include "WebContext.h"
#include "WebContextUserMessageCoders.h"
#include "WebCoreArgumentCoders.h"
#include "WebData.h"
#include "WebEditCommandProxy.h"
#include "WebEvent.h"
#include "WebFormSubmissionListenerProxy.h"
#include "WebFramePolicyListenerProxy.h"
#include "WebPageCreationParameters.h"
#include "WebPageMessages.h"
#include "WebPageNamespace.h"
#include "WebPopupItem.h"
#include "WebPopupMenuProxy.h"
#include "WebPreferences.h"
#include "WebProcessManager.h"
#include "WebProcessMessages.h"
#include "WebProcessProxy.h"
#include "WebURLRequest.h"
#include <WebCore/FloatRect.h>
#include <stdio.h>

#ifndef NDEBUG
#include <wtf/RefCountedLeakCounter.h>
#endif

using namespace WebCore;

namespace WebKit {

#ifndef NDEBUG
static WTF::RefCountedLeakCounter webPageProxyCounter("WebPageProxy");
#endif

PassRefPtr<WebPageProxy> WebPageProxy::create(WebPageNamespace* pageNamespace, uint64_t pageID)
{
    return adoptRef(new WebPageProxy(pageNamespace, pageID));
}

WebPageProxy::WebPageProxy(WebPageNamespace* pageNamespace, uint64_t pageID)
    : m_pageClient(0)
    , m_pageNamespace(pageNamespace)
    , m_mainFrame(0)
    , m_estimatedProgress(0.0)
    , m_isInWindow(false)
    , m_backForwardList(WebBackForwardList::create(this))
    , m_textZoomFactor(1)
    , m_pageZoomFactor(1)
    , m_valid(true)
    , m_closed(false)
    , m_pageID(pageID)
{
#ifndef NDEBUG
    webPageProxyCounter.increment();
#endif
}

WebPageProxy::~WebPageProxy()
{
#ifndef NDEBUG
    webPageProxyCounter.decrement();
#endif
}

WebProcessProxy* WebPageProxy::process() const
{
    return m_pageNamespace->process();
}

bool WebPageProxy::isValid()
{
    return m_valid;
}

void WebPageProxy::setPageClient(PageClient* pageClient)
{
    m_pageClient = pageClient;
}

void WebPageProxy::setDrawingArea(PassOwnPtr<DrawingAreaProxy> drawingArea)
{
    if (drawingArea == m_drawingArea)
        return;

    m_drawingArea = drawingArea;
}

void WebPageProxy::initializeLoaderClient(const WKPageLoaderClient* loadClient)
{
    m_loaderClient.initialize(loadClient);
}

void WebPageProxy::initializePolicyClient(const WKPagePolicyClient* policyClient)
{
    m_policyClient.initialize(policyClient);
}

void WebPageProxy::initializeFormClient(const WKPageFormClient* formClient)
{
    m_formClient.initialize(formClient);
}

void WebPageProxy::initializeUIClient(const WKPageUIClient* client)
{
    m_uiClient.initialize(client);
}

void WebPageProxy::initializeFindClient(const WKPageFindClient* client)
{
    m_findClient.initialize(client);
}

void WebPageProxy::revive()
{
    m_valid = true;
    m_pageNamespace->reviveIfNecessary();
    m_pageNamespace->process()->addExistingWebPage(this, m_pageID);

    processDidRevive();
}

void WebPageProxy::initializeWebPage(const IntSize& size)
{
    if (!isValid()) {
        revive();
        return;
    }

    ASSERT(m_drawingArea);
    process()->send(Messages::WebProcess::CreateWebPage(m_pageID, creationParameters(size)), 0);
}

void WebPageProxy::reinitializeWebPage(const WebCore::IntSize& size)
{
    if (!isValid())
        return;

    ASSERT(m_drawingArea);
    process()->send(Messages::WebProcess::CreateWebPage(m_pageID, creationParameters(size)), 0);
}

void WebPageProxy::close()
{
    if (!isValid())
        return;

    m_closed = true;

    process()->disconnectFramesFromPage(this);
    m_mainFrame = 0;

    m_pageTitle = String();
    m_toolTip = String();

    Vector<RefPtr<ScriptReturnValueCallback> > scriptReturnValueCallbacks;
    copyValuesToVector(m_scriptReturnValueCallbacks, scriptReturnValueCallbacks);
    for (size_t i = 0, size = scriptReturnValueCallbacks.size(); i < size; ++i)
        scriptReturnValueCallbacks[i]->invalidate();
    m_scriptReturnValueCallbacks.clear();

    Vector<RefPtr<RenderTreeExternalRepresentationCallback> > renderTreeExternalRepresentationCallbacks;
    copyValuesToVector(m_renderTreeExternalRepresentationCallbacks, renderTreeExternalRepresentationCallbacks);
    for (size_t i = 0, size = renderTreeExternalRepresentationCallbacks.size(); i < size; ++i)
        renderTreeExternalRepresentationCallbacks[i]->invalidate();
    m_renderTreeExternalRepresentationCallbacks.clear();

    Vector<RefPtr<FrameSourceCallback> > frameSourceCallbacks;
    copyValuesToVector(m_frameSourceCallbacks, frameSourceCallbacks);
    m_frameSourceCallbacks.clear();
    for (size_t i = 0, size = frameSourceCallbacks.size(); i < size; ++i)
        frameSourceCallbacks[i]->invalidate();

    Vector<WebEditCommandProxy*> editCommandVector;
    copyToVector(m_editCommandSet, editCommandVector);
    m_editCommandSet.clear();
    for (size_t i = 0, size = editCommandVector.size(); i < size; ++i)
        editCommandVector[i]->invalidate();

    m_activePopupMenu = 0;

    m_estimatedProgress = 0.0;
    
    m_loaderClient.initialize(0);
    m_policyClient.initialize(0);
    m_uiClient.initialize(0);

    m_drawingArea.clear();

    process()->send(Messages::WebPage::Close(), m_pageID);
    process()->removeWebPage(m_pageID);
}

bool WebPageProxy::tryClose()
{
    if (!isValid())
        return true;

    process()->send(Messages::WebPage::TryClose(), m_pageID);
    return false;
}

void WebPageProxy::loadURL(const String& url)
{
    if (!isValid()) {
        puts("loadURL called with a dead WebProcess");
        revive();
    }

    process()->send(Messages::WebPage::LoadURL(url), m_pageID);
}

void WebPageProxy::loadURLRequest(WebURLRequest* urlRequest)
{
    if (!isValid()) {
        puts("loadURLRequest called with a dead WebProcess");
        revive();
    }

    process()->send(Messages::WebPage::LoadURLRequest(urlRequest->resourceRequest()), m_pageID);
}

void WebPageProxy::loadHTMLString(const String& htmlString, const String& baseURL)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::LoadHTMLString(htmlString, baseURL), m_pageID);
}

void WebPageProxy::loadPlainTextString(const String& string)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::LoadPlainTextString(string), m_pageID);
}

void WebPageProxy::stopLoading()
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::StopLoading(), m_pageID);
}

void WebPageProxy::reload(bool reloadFromOrigin)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::Reload(reloadFromOrigin), m_pageID);
}

void WebPageProxy::goForward()
{
    if (!isValid())
        return;

    if (!canGoForward())
        return;

    process()->send(Messages::WebPage::GoForward(m_backForwardList->forwardItem()->itemID()), m_pageID);
}

bool WebPageProxy::canGoForward() const
{
    return m_backForwardList->forwardItem();
}

void WebPageProxy::goBack()
{
    if (!isValid())
        return;

    if (!canGoBack())
        return;

    process()->send(Messages::WebPage::GoBack(m_backForwardList->backItem()->itemID()), m_pageID);
}

bool WebPageProxy::canGoBack() const
{
    return m_backForwardList->backItem();
}

void WebPageProxy::goToBackForwardItem(WebBackForwardListItem* item)
{
    if (!isValid())
        return;

    process()->send(Messages::WebPage::GoToBackForwardItem(item->itemID()), m_pageID);
}

void WebPageProxy::didChangeBackForwardList()
{
    m_loaderClient.didChangeBackForwardList(this);
}

void WebPageProxy::setFocused(bool isFocused)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetFocused(isFocused), m_pageID);
}

void WebPageProxy::setActive(bool active)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetActive(active), m_pageID);
}

void WebPageProxy::setWindowResizerSize(const IntSize& windowResizerSize)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetWindowResizerSize(windowResizerSize), m_pageID);
}

void WebPageProxy::validateMenuItem(const String& commandName)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::ValidateMenuItem(commandName), m_pageID);
}
    
void WebPageProxy::executeEditCommand(const String& commandName)
{
    if (!isValid())
        return;

    process()->send(Messages::WebPage::ExecuteEditCommand(commandName), m_pageID);
}
    
void WebPageProxy::setIsInWindow(bool isInWindow)
{
    if (m_isInWindow == isInWindow)
        return;
    
    m_isInWindow = isInWindow;
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetIsInWindow(isInWindow), m_pageID);
}

#if PLATFORM(MAC)
void WebPageProxy::updateWindowIsVisible(bool windowIsVisible)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetWindowIsVisible(windowIsVisible), m_pageID);
}

void WebPageProxy::updateWindowFrame(const IntRect& windowFrame)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::SetWindowFrame(windowFrame), m_pageID);
}
#endif

void WebPageProxy::handleMouseEvent(const WebMouseEvent& event)
{
    if (!isValid())
        return;

    // NOTE: This does not start the responsiveness timer because mouse move should not indicate interaction.
    if (event.type() != WebEvent::MouseMove)
        process()->responsivenessTimer()->start();
    process()->send(Messages::WebPage::MouseEvent(event), m_pageID);
}

void WebPageProxy::handleWheelEvent(const WebWheelEvent& event)
{
    if (!isValid())
        return;

    process()->responsivenessTimer()->start();
    process()->send(Messages::WebPage::WheelEvent(event), m_pageID);
}

void WebPageProxy::handleKeyboardEvent(const NativeWebKeyboardEvent& event)
{
    if (!isValid())
        return;

    m_keyEventQueue.append(event);

    process()->responsivenessTimer()->start();
    process()->send(Messages::WebPage::KeyEvent(event), m_pageID);
}

#if ENABLE(TOUCH_EVENTS)
void WebPageProxy::handleTouchEvent(const WebTouchEvent& event)
{
    if (!isValid())
        return;
    process()->send(Messages::WebPage::TouchEvent(event), m_pageID); 
}
#endif

void WebPageProxy::receivedPolicyDecision(WebCore::PolicyAction action, WebFrameProxy* frame, uint64_t listenerID)
{
    if (!isValid())
        return;

    process()->send(Messages::WebPage::DidReceivePolicyDecision(frame->frameID(), listenerID, action), m_pageID);
}

void WebPageProxy::setCustomUserAgent(const String& userAgent)
{
    if (!isValid())
        return;

    process()->send(Messages::WebPage::SetCustomUserAgent(userAgent), m_pageID);
}

void WebPageProxy::terminateProcess()
{
    if (!isValid())
        return;

    process()->terminate();
}

#if !PLATFORM(CF)
PassRefPtr<WebData> WebPageProxy::sessionStateData(WebPageProxySessionStateFilterCallback, void* context) const
{
    // FIXME: Return session state data for saving Page state.
    return 0;
}

void WebPageProxy::restoreFromSessionStateData(WebData*)
{
    // FIXME: Restore the Page from the passed in session state data.
}
#endif

void WebPageProxy::setTextZoomFactor(double zoomFactor)
{
    if (!isValid())
        return;

    if (m_textZoomFactor == zoomFactor)
        return;

    m_textZoomFactor = zoomFactor;
    process()->send(Messages::WebPage::SetTextZoomFactor(m_textZoomFactor), m_pageID); 
}

void WebPageProxy::setPageZoomFactor(double zoomFactor)
{
    if (!isValid())
        return;

    if (m_pageZoomFactor == zoomFactor)
        return;

    m_pageZoomFactor = zoomFactor;
    process()->send(Messages::WebPage::SetPageZoomFactor(m_pageZoomFactor), m_pageID); 
}

void WebPageProxy::setPageAndTextZoomFactors(double pageZoomFactor, double textZoomFactor)
{
    if (!isValid())
        return;

    if (m_pageZoomFactor == pageZoomFactor && m_textZoomFactor == textZoomFactor)
        return;

    m_pageZoomFactor = pageZoomFactor;
    m_textZoomFactor = textZoomFactor;
    process()->send(Messages::WebPage::SetPageAndTextZoomFactors(m_pageZoomFactor, m_textZoomFactor), m_pageID); 
}

void WebPageProxy::findString(const String& string, FindDirection findDirection, FindOptions findOptions, unsigned maxNumMatches)
{
    process()->send(Messages::WebPage::FindString(string, findDirection, findOptions, maxNumMatches), m_pageID);
}

void WebPageProxy::hideFindUI()
{
    process()->send(Messages::WebPage::HideFindUI(), m_pageID);
}

void WebPageProxy::countStringMatches(const String& string, bool caseInsensitive, unsigned maxNumMatches)
{
    process()->send(Messages::WebPage::CountStringMatches(string, caseInsensitive, maxNumMatches), m_pageID);
}
    
void WebPageProxy::runJavaScriptInMainFrame(const String& script, PassRefPtr<ScriptReturnValueCallback> prpCallback)
{
    RefPtr<ScriptReturnValueCallback> callback = prpCallback;
    uint64_t callbackID = callback->callbackID();
    m_scriptReturnValueCallbacks.set(callbackID, callback.get());
    process()->send(Messages::WebPage::RunJavaScriptInMainFrame(script, callbackID), m_pageID);
}

void WebPageProxy::getRenderTreeExternalRepresentation(PassRefPtr<RenderTreeExternalRepresentationCallback> prpCallback)
{
    RefPtr<RenderTreeExternalRepresentationCallback> callback = prpCallback;
    uint64_t callbackID = callback->callbackID();
    m_renderTreeExternalRepresentationCallbacks.set(callbackID, callback.get());
    process()->send(Messages::WebPage::GetRenderTreeExternalRepresentation(callbackID), m_pageID);
}

void WebPageProxy::getSourceForFrame(WebFrameProxy* frame, PassRefPtr<FrameSourceCallback> prpCallback)
{
    RefPtr<FrameSourceCallback> callback = prpCallback;
    uint64_t callbackID = callback->callbackID();
    m_frameSourceCallbacks.set(callbackID, callback.get());
    process()->send(Messages::WebPage::GetSourceForFrame(frame->frameID(), callbackID), m_pageID);
}

void WebPageProxy::preferencesDidChange()
{
    if (!isValid())
        return;

    // FIXME: It probably makes more sense to send individual preference changes.
    // However, WebKitTestRunner depends on getting a preference change notification even if nothing changed in UI process, so that overrides get removed.
    process()->send(Messages::WebPage::PreferencesDidChange(pageNamespace()->context()->preferences()->store()), m_pageID);
}

void WebPageProxy::getStatistics(WKContextStatistics* statistics)
{
    statistics->numberOfWKFrames += process()->frameCountInPage(this);
}

void WebPageProxy::didReceiveMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
{
    if (messageID.is<CoreIPC::MessageClassDrawingAreaProxy>()) {
        m_drawingArea->didReceiveMessage(connection, messageID, arguments);
        return;
    }

    didReceiveWebPageProxyMessage(connection, messageID, arguments);
}

void WebPageProxy::didReceiveSyncMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments, CoreIPC::ArgumentEncoder* reply)
{
    if (messageID.is<CoreIPC::MessageClassDrawingAreaProxy>()) {
        m_drawingArea->didReceiveSyncMessage(connection, messageID, arguments, reply);
        return;
    }

    // FIXME: Do something with reply.
    didReceiveSyncWebPageProxyMessage(connection, messageID, arguments, reply);
}

void WebPageProxy::didCreateMainFrame(uint64_t frameID)
{
    ASSERT(!m_mainFrame);

    m_mainFrame = WebFrameProxy::create(this, frameID);
    process()->frameCreated(frameID, m_mainFrame.get());
}

void WebPageProxy::didCreateSubFrame(uint64_t frameID)
{
    ASSERT(m_mainFrame);
    process()->frameCreated(frameID, WebFrameProxy::create(this, frameID).get());
}

void WebPageProxy::didStartProgress()
{
    m_estimatedProgress = 0.0;
    
    m_loaderClient.didStartProgress(this);
}

void WebPageProxy::didChangeProgress(double value)
{
    m_estimatedProgress = value;
    
    m_loaderClient.didChangeProgress(this);
}

void WebPageProxy::didFinishProgress()
{
    m_estimatedProgress = 1.0;

    m_loaderClient.didFinishProgress(this);
}

void WebPageProxy::didStartProvisionalLoadForFrame(uint64_t frameID, const String& url, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->didStartProvisionalLoad(url);
    m_loaderClient.didStartProvisionalLoadForFrame(this, frame, userData.get());
}

void WebPageProxy::didReceiveServerRedirectForProvisionalLoadForFrame(uint64_t frameID, const String& url, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->didReceiveServerRedirectForProvisionalLoad(url);
    m_loaderClient.didReceiveServerRedirectForProvisionalLoadForFrame(this, frame, userData.get());
}

void WebPageProxy::didFailProvisionalLoadForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->didFailProvisionalLoad();
    m_loaderClient.didFailProvisionalLoadWithErrorForFrame(this, frame, userData.get());
}

void WebPageProxy::didCommitLoadForFrame(uint64_t frameID, const String& mimeType, const PlatformCertificateInfo& certificateInfo, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->setMIMEType(mimeType);
    frame->setCertificateInfo(WebCertificateInfo::create(certificateInfo));
    frame->didCommitLoad();
    m_loaderClient.didCommitLoadForFrame(this, frame, userData.get());
}

void WebPageProxy::didFinishDocumentLoadForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    m_loaderClient.didFinishDocumentLoadForFrame(this, frame, userData.get());
}

void WebPageProxy::didFinishLoadForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->didFinishLoad();
    m_loaderClient.didFinishLoadForFrame(this, frame, userData.get());
}

void WebPageProxy::didFailLoadForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);
    frame->didFailLoad();

    m_loaderClient.didFailLoadWithErrorForFrame(this, frame, userData.get());
}

void WebPageProxy::didReceiveTitleForFrame(uint64_t frameID, const String& title, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    frame->didReceiveTitle(title);

    // Cache the title for the main frame in the page.
    if (frame == m_mainFrame)
        m_pageTitle = title;

    m_loaderClient.didReceiveTitleForFrame(this, title, frame, userData.get());
}

void WebPageProxy::didFirstLayoutForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    m_loaderClient.didFirstLayoutForFrame(this, frame, userData.get());
}

void WebPageProxy::didFirstVisuallyNonEmptyLayoutForFrame(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    m_loaderClient.didFirstVisuallyNonEmptyLayoutForFrame(this, frame, userData.get());
}

void WebPageProxy::didRemoveFrameFromHierarchy(uint64_t frameID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);

    m_loaderClient.didRemoveFrameFromHierarchy(this, frame, userData.get());
}

// PolicyClient

void WebPageProxy::decidePolicyForNavigationAction(uint64_t frameID, uint32_t opaqueNavigationType, uint32_t opaqueModifiers, int32_t opaqueMouseButton, const String& url, uint64_t listenerID)
{
    WebFrameProxy* frame = process()->webFrame(frameID);
    NavigationType navigationType = static_cast<NavigationType>(opaqueNavigationType);
    WebEvent::Modifiers modifiers = static_cast<WebEvent::Modifiers>(opaqueModifiers);
    WebMouseEvent::Button mouseButton = static_cast<WebMouseEvent::Button>(opaqueMouseButton);
    
    RefPtr<WebFramePolicyListenerProxy> listener = frame->setUpPolicyListenerProxy(listenerID);
    if (!m_policyClient.decidePolicyForNavigationAction(this, navigationType, modifiers, mouseButton, url, frame, listener.get()))
        listener->use();
}

void WebPageProxy::decidePolicyForNewWindowAction(uint64_t frameID, uint32_t opaqueNavigationType, uint32_t opaqueModifiers, int32_t opaqueMouseButton, const String& url, uint64_t listenerID)
{
    WebFrameProxy* frame = process()->webFrame(frameID);
    NavigationType navigationType = static_cast<NavigationType>(opaqueNavigationType);
    WebEvent::Modifiers modifiers = static_cast<WebEvent::Modifiers>(opaqueModifiers);
    WebMouseEvent::Button mouseButton = static_cast<WebMouseEvent::Button>(opaqueMouseButton);

    RefPtr<WebFramePolicyListenerProxy> listener = frame->setUpPolicyListenerProxy(listenerID);
    if (!m_policyClient.decidePolicyForNewWindowAction(this, navigationType, modifiers, mouseButton, url, frame, listener.get()))
        listener->use();
}

void WebPageProxy::decidePolicyForMIMEType(uint64_t frameID, const String& MIMEType, const String& url, uint64_t listenerID)
{
    WebFrameProxy* frame = process()->webFrame(frameID);
    RefPtr<WebFramePolicyListenerProxy> listener = frame->setUpPolicyListenerProxy(listenerID);
    if (!m_policyClient.decidePolicyForMIMEType(this, MIMEType, url, frame, listener.get()))
        listener->use();
}

// FormClient

void WebPageProxy::willSubmitForm(uint64_t frameID, uint64_t sourceFrameID, const StringPairVector& textFieldValues, uint64_t listenerID, CoreIPC::ArgumentDecoder* arguments)
{
    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebFrameProxy* frame = process()->webFrame(frameID);
    WebFrameProxy* sourceFrame = process()->webFrame(sourceFrameID);

    RefPtr<WebFormSubmissionListenerProxy> listener = frame->setUpFormSubmissionListenerProxy(listenerID);
    if (!m_formClient.willSubmitForm(this, frame, sourceFrame, textFieldValues.stringPairVector(), userData.get(), listener.get()))
        listener->continueSubmission();
}

// UIClient

void WebPageProxy::createNewPage(uint64_t& newPageID, WebPageCreationParameters& newPageParameters)
{
    RefPtr<WebPageProxy> newPage = m_uiClient.createNewPage(this);
    if (newPage) {
        // FIXME: Pass the real size.
        newPageID = newPage->pageID();
        newPageParameters = newPage->creationParameters(IntSize(100, 100));
    } else
        newPageID = 0;
}
    
void WebPageProxy::showPage()
{
    m_uiClient.showPage(this);
}

void WebPageProxy::closePage()
{
    m_uiClient.close(this);
}

void WebPageProxy::runJavaScriptAlert(uint64_t frameID, const String& message)
{
    m_uiClient.runJavaScriptAlert(this, message, process()->webFrame(frameID));
}

void WebPageProxy::runJavaScriptConfirm(uint64_t frameID, const String& message, bool& result)
{
    result = m_uiClient.runJavaScriptConfirm(this, message, process()->webFrame(frameID));
}

void WebPageProxy::runJavaScriptPrompt(uint64_t frameID, const String& message, const String& defaultValue, String& result)
{
    result = m_uiClient.runJavaScriptPrompt(this, message, defaultValue, process()->webFrame(frameID));
}

void WebPageProxy::setStatusText(const String& text)
{
    m_uiClient.setStatusText(this, text);
}

void WebPageProxy::mouseDidMoveOverElement(uint32_t opaqueModifiers, CoreIPC::ArgumentDecoder* arguments)
{

    RefPtr<APIObject> userData;
    WebContextUserMessageDecoder messageDecoder(userData, pageNamespace()->context());
    if (!arguments->decode(messageDecoder))
        return;

    WebEvent::Modifiers modifiers = static_cast<WebEvent::Modifiers>(opaqueModifiers);

    m_uiClient.mouseDidMoveOverElement(this, modifiers, userData.get());
}

void WebPageProxy::contentsSizeChanged(uint64_t frameID, const WebCore::IntSize& size)
{
    m_uiClient.contentsSizeChanged(this, size, process()->webFrame(frameID));
}

void WebPageProxy::setWindowFrame(const FloatRect& newWindowFrame)
{
    m_uiClient.setWindowFrame(this, m_pageClient->convertToDeviceSpace(newWindowFrame));
}

void WebPageProxy::getWindowFrame(FloatRect& newWindowFrame)
{
    newWindowFrame = m_pageClient->convertToUserSpace(m_uiClient.windowFrame(this));
}

void WebPageProxy::canRunBeforeUnloadConfirmPanel(bool& canRun)
{
    canRun = m_uiClient.canRunBeforeUnloadConfirmPanel();
}

void WebPageProxy::runBeforeUnloadConfirmPanel(const String& message, uint64_t frameID, bool& shouldClose)
{
    shouldClose = m_uiClient.runBeforeUnloadConfirmPanel(this, message, process()->webFrame(frameID));
}

void WebPageProxy::didChangeViewportData(const ViewportArguments& args)
{
    m_pageClient->setViewportArguments(args);
}

void WebPageProxy::didDraw()
{
    m_uiClient.didDraw(this);
}

// BackForwardList

void WebPageProxy::backForwardAddItem(uint64_t itemID)
{
    m_backForwardList->addItem(process()->webBackForwardItem(itemID));
}

void WebPageProxy::backForwardGoToItem(uint64_t itemID)
{
    m_backForwardList->goToItem(process()->webBackForwardItem(itemID));
}

void WebPageProxy::backForwardBackItem(uint64_t& itemID)
{
    WebBackForwardListItem* backItem = m_backForwardList->backItem();
    itemID = backItem ? backItem->itemID() : 0;
}

void WebPageProxy::backForwardCurrentItem(uint64_t& itemID)
{
    WebBackForwardListItem* currentItem = m_backForwardList->currentItem();
    itemID = currentItem ? currentItem->itemID() : 0;
}

void WebPageProxy::backForwardForwardItem(uint64_t& itemID)
{
    WebBackForwardListItem* forwardItem = m_backForwardList->forwardItem();
    itemID = forwardItem ? forwardItem->itemID() : 0;
}

void WebPageProxy::backForwardItemAtIndex(int32_t index, uint64_t& itemID)
{
    WebBackForwardListItem* item = m_backForwardList->itemAtIndex(index);
    itemID = item ? item->itemID() : 0;
}

void WebPageProxy::backForwardBackListCount(int32_t& count)
{
    count = m_backForwardList->backListCount();
}

void WebPageProxy::backForwardForwardListCount(int32_t& count)
{
    count = m_backForwardList->forwardListCount();
}

// Undo management

void WebPageProxy::registerEditCommandForUndo(uint64_t commandID, uint32_t editAction)
{
    registerEditCommand(WebEditCommandProxy::create(commandID, static_cast<EditAction>(editAction), this), Undo);
}

void WebPageProxy::clearAllEditCommands()
{
    m_pageClient->clearAllEditCommands();
}

void WebPageProxy::didCountStringMatches(const String& string, uint32_t numMatches)
{
    m_findClient.didCountStringMatches(this, string, numMatches);
}

void WebPageProxy::setFindIndicator(const FloatRect& selectionRect, const Vector<FloatRect>& textRects, const SharedMemory::Handle& contentImageHandle, bool fadeOut)
{
    RefPtr<FindIndicator> findIndicator = FindIndicator::create(selectionRect, textRects, contentImageHandle);
    m_pageClient->setFindIndicator(findIndicator.release(), fadeOut);
}

void WebPageProxy::showPopupMenu(const IntRect& rect, const Vector<WebPopupItem>& items, int32_t selectedIndex)
{
    if (m_activePopupMenu)
        m_activePopupMenu->hidePopupMenu();
    else
        m_activePopupMenu = m_pageClient->createPopupMenuProxy();

    int32_t newSelectedIndex = 0;
    m_activePopupMenu->showPopupMenu(rect, items, selectedIndex, newSelectedIndex);

    process()->send(Messages::WebPage::DidChangeSelectedIndexForActivePopupMenu(newSelectedIndex), m_pageID);
    m_activePopupMenu = 0;
}

void WebPageProxy::hidePopupMenu()
{
    if (!m_activePopupMenu)
        return;

    m_activePopupMenu->hidePopupMenu();
    m_activePopupMenu = 0;
}

void WebPageProxy::registerEditCommand(PassRefPtr<WebEditCommandProxy> commandProxy, UndoOrRedo undoOrRedo)
{
    m_pageClient->registerEditCommand(commandProxy, undoOrRedo);
}

void WebPageProxy::addEditCommand(WebEditCommandProxy* command)
{
    m_editCommandSet.add(command);
}

void WebPageProxy::removeEditCommand(WebEditCommandProxy* command)
{
    m_editCommandSet.remove(command);

    if (!isValid())
        return;
    process()->send(Messages::WebPage::DidRemoveEditCommand(command->commandID()), m_pageID);
}

// Other

void WebPageProxy::takeFocus(bool direction)
{
    m_pageClient->takeFocus(direction);
}

void WebPageProxy::setToolTip(const String& toolTip)
{
    String oldToolTip = m_toolTip;
    m_toolTip = toolTip;
    m_pageClient->toolTipChanged(oldToolTip, m_toolTip);
}

void WebPageProxy::setCursor(const WebCore::Cursor& cursor)
{
    m_pageClient->setCursor(cursor);
}

void WebPageProxy::didValidateMenuItem(const String& commandName, bool isEnabled, int32_t state)
{
    m_pageClient->setEditCommandState(commandName, isEnabled, state);
}

void WebPageProxy::didReceiveEvent(uint32_t opaqueType, bool handled)
{
    WebEvent::Type type = static_cast<WebEvent::Type>(opaqueType);

    switch (type) {
        case WebEvent::MouseMove:
            break;

        case WebEvent::MouseDown:
        case WebEvent::MouseUp:
        case WebEvent::Wheel:
        case WebEvent::KeyDown:
        case WebEvent::KeyUp:
        case WebEvent::RawKeyDown:
        case WebEvent::Char:
            process()->responsivenessTimer()->stop();
            break;
    }

    if (!WebKeyboardEvent::isKeyboardEventType(type))
        return;

    NativeWebKeyboardEvent event = m_keyEventQueue.first();
    ASSERT(type == event.type());
    m_keyEventQueue.removeFirst();

    if (handled)
        return;

    m_pageClient->didNotHandleKeyEvent(event);
    m_uiClient.didNotHandleKeyEvent(this, event);
}

void WebPageProxy::didRunJavaScriptInMainFrame(const String& resultString, uint64_t callbackID)
{
    RefPtr<ScriptReturnValueCallback> callback = m_scriptReturnValueCallbacks.take(callbackID);
    if (!callback) {
        // FIXME: Log error or assert.
        return;
    }

    callback->performCallbackWithReturnValue(resultString.impl());
}

void WebPageProxy::didGetRenderTreeExternalRepresentation(const String& resultString, uint64_t callbackID)
{
    RefPtr<RenderTreeExternalRepresentationCallback> callback = m_renderTreeExternalRepresentationCallbacks.take(callbackID);
    if (!callback) {
        // FIXME: Log error or assert.
        return;
    }

    callback->performCallbackWithReturnValue(resultString.impl());
}

void WebPageProxy::didGetSourceForFrame(const String& resultString, uint64_t callbackID)
{
    RefPtr<FrameSourceCallback> callback = m_frameSourceCallbacks.take(callbackID);
    if (!callback) {
        // FIXME: Log error or assert.
        return;
    }

    callback->performCallbackWithReturnValue(resultString.impl());
}


#if USE(ACCELERATED_COMPOSITING)
void WebPageProxy::didChangeAcceleratedCompositing(bool compositing, DrawingAreaBase::DrawingAreaInfo& drawingAreaInfo)
{
    if (compositing)
        didEnterAcceleratedCompositing();
    else
        didLeaveAcceleratedCompositing();

    drawingAreaInfo = drawingArea()->info();
}
#endif

void WebPageProxy::processDidBecomeUnresponsive()
{
    m_loaderClient.didBecomeUnresponsive(this);
}

void WebPageProxy::processDidBecomeResponsive()
{
    m_loaderClient.didBecomeResponsive(this);
}

void WebPageProxy::processDidExit()
{
    ASSERT(m_pageClient);

    m_valid = false;

    if (m_mainFrame)
        m_urlAtProcessExit = m_mainFrame->url();

    m_mainFrame = 0;

    m_pageTitle = String();
    m_toolTip = String();

    Vector<RefPtr<ScriptReturnValueCallback> > scriptReturnValueCallbacks;
    copyValuesToVector(m_scriptReturnValueCallbacks, scriptReturnValueCallbacks);
    for (size_t i = 0, size = scriptReturnValueCallbacks.size(); i < size; ++i)
        scriptReturnValueCallbacks[i]->invalidate();
    m_scriptReturnValueCallbacks.clear();

    Vector<RefPtr<RenderTreeExternalRepresentationCallback> > renderTreeExternalRepresentationCallbacks;
    copyValuesToVector(m_renderTreeExternalRepresentationCallbacks, renderTreeExternalRepresentationCallbacks);
    for (size_t i = 0, size = renderTreeExternalRepresentationCallbacks.size(); i < size; ++i)
        renderTreeExternalRepresentationCallbacks[i]->invalidate();
    m_renderTreeExternalRepresentationCallbacks.clear();

    Vector<RefPtr<FrameSourceCallback> > frameSourceCallbacks;
    copyValuesToVector(m_frameSourceCallbacks, frameSourceCallbacks);
    m_frameSourceCallbacks.clear();
    for (size_t i = 0, size = frameSourceCallbacks.size(); i < size; ++i)
        frameSourceCallbacks[i]->invalidate();

    Vector<WebEditCommandProxy*> editCommandVector;
    copyToVector(m_editCommandSet, editCommandVector);
    m_editCommandSet.clear();
    for (size_t i = 0, size = editCommandVector.size(); i < size; ++i)
        editCommandVector[i]->invalidate();
    m_pageClient->clearAllEditCommands();

    m_activePopupMenu = 0;

    m_estimatedProgress = 0.0;

    m_pageClient->processDidExit();
    m_loaderClient.processDidExit(this);
}

void WebPageProxy::processDidRevive()
{
    ASSERT(m_pageClient);
    m_pageClient->processDidRevive();
}

WebPageCreationParameters WebPageProxy::creationParameters(const IntSize& size) const
{
    WebPageCreationParameters parameters;
    parameters.viewSize = size;
    parameters.store = pageNamespace()->context()->preferences()->store();
    parameters.drawingAreaInfo = m_drawingArea->info();

#if PLATFORM(WIN)
    parameters.nativeWindow = m_pageClient->nativeWindow();
#endif

    return parameters;
}

#if USE(ACCELERATED_COMPOSITING)
void WebPageProxy::didEnterAcceleratedCompositing()
{
    m_pageClient->pageDidEnterAcceleratedCompositing();
}

void WebPageProxy::didLeaveAcceleratedCompositing()
{
    m_pageClient->pageDidLeaveAcceleratedCompositing();
}
#endif // USE(ACCELERATED_COMPOSITING)

} // namespace WebKit