webchromeclient.cpp

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WebKit

/*
 * Copyright (C) 2006, 2007, 2008 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
 * 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 "config.h"
#include "WebChromeClient.h"

#include "WebElementPropertyBag.h"
#include "WebFrame.h"
#include "WebHistory.h"
#include "WebMutableURLRequest.h"
#include "WebSecurityOrigin.h"
#include "WebView.h"
#pragma warning(push, 0)
#include <WebCore/BString.h>
#include <WebCore/ContextMenu.h>
#include <WebCore/FileChooser.h>
#include <WebCore/FloatRect.h>
#include <WebCore/FrameLoadRequest.h>
#include <WebCore/FrameView.h>
#include <WebCore/LocalizedStrings.h>
#include <WebCore/NotImplemented.h>
#include <WebCore/Page.h>
#include <WebCore/WindowFeatures.h>
#pragma warning(pop)

#include <tchar.h>

using namespace WebCore;

// When you call GetOpenFileName, if the size of the buffer is too small,
// MSDN says that the first two bytes of the buffer contain the required size for the file selection, in bytes or characters
// So we can assume the required size can't be more than the maximum value for a short.
static const size_t maxFilePathsListSize = USHRT_MAX;

WebChromeClient::WebChromeClient(WebView* webView)
    : m_webView(webView)
{
}

void WebChromeClient::chromeDestroyed()
{
    delete this;
}

void WebChromeClient::setWindowRect(const FloatRect& r)
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        RECT rect = IntRect(r);
        uiDelegate->setFrame(m_webView, &rect);
        uiDelegate->Release();
    }
}

FloatRect WebChromeClient::windowRect()
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        RECT rect;
        HRESULT retval = uiDelegate->webViewFrame(m_webView, &rect);

        uiDelegate->Release();

        if (SUCCEEDED(retval))
            return rect;
    }

    return FloatRect();
}

FloatRect WebChromeClient::pageRect()
{
    RECT rect;
    m_webView->frameRect(&rect);
    return rect;
}

float WebChromeClient::scaleFactor()
{
    // Windows doesn't support UI scaling.
    return 1.0;
}

void WebChromeClient::focus()
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->webViewFocus(m_webView);
        uiDelegate->Release();
    }
    // Normally this would happen on a timer, but JS might need to know this earlier, so we'll update here.
    m_webView->updateActiveState();
}

void WebChromeClient::unfocus()
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->webViewUnfocus(m_webView);
        uiDelegate->Release();
    }
    // Normally this would happen on a timer, but JS might need to know this earlier, so we'll update here.
    m_webView->updateActiveState();
}

bool WebChromeClient::canTakeFocus(FocusDirection direction)
{
    IWebUIDelegate* uiDelegate = 0;
    BOOL bForward = (direction == FocusDirectionForward) ? TRUE : FALSE;
    BOOL result = FALSE;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->canTakeFocus(m_webView, bForward, &result);
        uiDelegate->Release();
    }

    return !!result;
}

void WebChromeClient::takeFocus(FocusDirection direction)
{
    IWebUIDelegate* uiDelegate = 0;
    BOOL bForward = (direction == FocusDirectionForward) ? TRUE : FALSE;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->takeFocus(m_webView, bForward);
        uiDelegate->Release();
    }
}

Page* WebChromeClient::createWindow(Frame*, const FrameLoadRequest& frameLoadRequest, const WindowFeatures& features)
{
    if (features.dialog) {
        COMPtr<IWebUIDelegate3> delegate = uiDelegate3();
        if (!delegate)
            return 0;
        COMPtr<IWebMutableURLRequest> request(AdoptCOM, WebMutableURLRequest::createInstance(frameLoadRequest.resourceRequest()));
        COMPtr<IWebView> dialog;
        if (FAILED(delegate->createModalDialog(m_webView, request.get(), &dialog)))
            return 0;
        return core(dialog.get());
    }

    Page* page = 0;
    IWebUIDelegate* uiDelegate = 0;
    IWebMutableURLRequest* request = WebMutableURLRequest::createInstance(frameLoadRequest.resourceRequest());

    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        IWebView* webView = 0;
        if (SUCCEEDED(uiDelegate->createWebViewWithRequest(m_webView, request, &webView))) {
            page = core(webView);
            webView->Release();
        }
    
        uiDelegate->Release();
    }

    request->Release();
    return page;
}

void WebChromeClient::show()
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->webViewShow(m_webView);
        uiDelegate->Release();
    }
}

bool WebChromeClient::canRunModal()
{
    BOOL result = FALSE;
    if (COMPtr<IWebUIDelegate3> delegate = uiDelegate3())
        delegate->canRunModal(m_webView, &result);
    return result;
}

void WebChromeClient::runModal()
{
    if (COMPtr<IWebUIDelegate3> delegate = uiDelegate3())
        delegate->runModal(m_webView);
}

void WebChromeClient::setToolbarsVisible(bool visible)
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->setToolbarsVisible(m_webView, visible);
        uiDelegate->Release();
    }
}

bool WebChromeClient::toolbarsVisible()
{
    BOOL result = false;
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->webViewAreToolbarsVisible(m_webView, &result);
        uiDelegate->Release();
    }
    return result != false;
}

void WebChromeClient::setStatusbarVisible(bool visible)
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->setStatusBarVisible(m_webView, visible);
        uiDelegate->Release();
    }
}

bool WebChromeClient::statusbarVisible()
{
    BOOL result = false;
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->webViewIsStatusBarVisible(m_webView, &result);
        uiDelegate->Release();
    }
    return result != false;
}

void WebChromeClient::setScrollbarsVisible(bool b)
{
    WebFrame* webFrame = m_webView->topLevelFrame();
    if (webFrame)
        webFrame->setAllowsScrolling(b);
}

bool WebChromeClient::scrollbarsVisible()
{
    WebFrame* webFrame = m_webView->topLevelFrame();
    BOOL b = false;
    if (webFrame)
        webFrame->allowsScrolling(&b);

    return !!b;
}

void WebChromeClient::setMenubarVisible(bool visible)
{
    COMPtr<IWebUIDelegate3> delegate = uiDelegate3();
    if (!delegate)
        return;
    delegate->setMenuBarVisible(m_webView, visible);
}

bool WebChromeClient::menubarVisible()
{
    COMPtr<IWebUIDelegate3> delegate = uiDelegate3();
    if (!delegate)
        return true;
    BOOL result = true;
    delegate->isMenuBarVisible(m_webView, &result);
    return result;
}

void WebChromeClient::setResizable(bool resizable)
{
    IWebUIDelegate* uiDelegate = 0;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        uiDelegate->setResizable(m_webView, resizable);
        uiDelegate->Release();
    }
}

void WebChromeClient::addMessageToConsole(const String& message, unsigned line, const String& url)
{
    COMPtr<IWebUIDelegate> uiDelegate;
    if (SUCCEEDED(m_webView->uiDelegate(&uiDelegate))) {
        COMPtr<IWebUIDelegatePrivate> uiPrivate;
        if (SUCCEEDED(uiDelegate->QueryInterface(IID_IWebUIDelegatePrivate, (void**)&uiPrivate)))
            uiPrivate->webViewAddMessageToConsole(m_webView, BString(message), line, BString(url), true);
    }
}

bool WebChromeClient::canRunBeforeUnloadConfirmPanel()
{
    IWebUIDelegate* ui;
    if (SUCCEEDED(m_webView->uiDelegate(&ui)) && ui) {
        ui->Release();
        return true;
    }
    return false;
}

bool WebChromeClient::runBeforeUnloadConfirmPanel(const String& message, Frame* frame)
{
    BOOL result = TRUE;
    IWebUIDelegate* ui;
    if (SUCCEEDED(m_webView->uiDelegate(&ui)) && ui) {
        WebFrame* webFrame = kit(frame);
        ui->runBeforeUnloadConfirmPanelWithMessage(m_webView, BString(message), webFrame, &result);
        ui->Release();
    }
    return !!result;
}

void WebChromeClient::closeWindowSoon()
{
    // We need to remove the parent WebView from WebViewSets here, before it actually
    // closes, to make sure that JavaScript code that executes before it closes
    // can't find it. Otherwise, window.open will select a closed WebView instead of 
    // opening a new one <rdar://problem/3572585>.

    // We also need to stop the load to prevent further parsing or JavaScript execution
    // after the window has torn down <rdar://problem/4161660>.
  
    // FIXME: This code assumes that the UI delegate will respond to a webViewClose
    // message by actually closing the WebView. Safari guarantees this behavior, but other apps might not.
    // This approach is an inherent limitation of not making a close execute immediately
    // after a call to window.close.

    m_webView->setGroupName(0);
    m_webView->stopLoading(0);
    m_webView->closeWindowSoon();
}

void WebChromeClient::runJavaScriptAlert(Frame*, const String& message)
{
    COMPtr<IWebUIDelegate> ui;
    if (SUCCEEDED(m_webView->uiDelegate(&ui)))
        ui->runJavaScriptAlertPanelWithMessage(m_webView, BString(message));
}

bool WebChromeClient::runJavaScriptConfirm(Frame*, const String& message)
{
    BOOL result = FALSE;
    COMPtr<IWebUIDelegate> ui;
    if (SUCCEEDED(m_webView->uiDelegate(&ui)))
        ui->runJavaScriptConfirmPanelWithMessage(m_webView, BString(message), &result);
    return !!result;
}

bool WebChromeClient::runJavaScriptPrompt(Frame*, const String& message, const String& defaultValue, String& result)
{