contextmenuwin.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 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 "ContextMenu.h"

#include "CString.h"
#include "Document.h"
#include "Frame.h"
#include "FrameView.h"
#include "Node.h"
#include <tchar.h>
#include <windows.h>

namespace WebCore {

ContextMenu::ContextMenu(const HitTestResult& result)
    : m_hitTestResult(result)
    , m_platformDescription(0)
{
    setPlatformDescription(::CreatePopupMenu());
}

ContextMenu::ContextMenu(const HitTestResult& result, const PlatformMenuDescription menu)
    : m_hitTestResult(result)
    , m_platformDescription(0)
{
    setPlatformDescription(menu);
}

ContextMenu::~ContextMenu()
{
    if (m_platformDescription)
        ::DestroyMenu(m_platformDescription);
}

unsigned ContextMenu::itemCount() const
{
    if (!m_platformDescription)
        return 0;

    return ::GetMenuItemCount(m_platformDescription);
}

void ContextMenu::insertItem(unsigned int position, ContextMenuItem& item)
{
    if (!m_platformDescription)
        return;

    checkOrEnableIfNeeded(item);
    ::InsertMenuItem(m_platformDescription, position, TRUE, item.releasePlatformDescription());
}

void ContextMenu::appendItem(ContextMenuItem& item)
{
    insertItem(itemCount(), item);
}

static ContextMenuItem* contextMenuItemByIdOrPosition(HMENU menu, unsigned id, BOOL byPosition)
{
    if (!menu)
        return 0;
    LPMENUITEMINFO info = (LPMENUITEMINFO)malloc(sizeof(MENUITEMINFO));
    if (!info)
        return 0;

    memset(info, 0, sizeof(MENUITEMINFO));

    info->cbSize = sizeof(MENUITEMINFO);
    
    info->fMask = MIIM_FTYPE | MIIM_ID | MIIM_STRING;

    if (!::GetMenuItemInfo(menu, id, byPosition, info)) {
        free(info);
        return 0;
    }

    UINT type = info->fType & ~(MFT_MENUBARBREAK | MFT_MENUBREAK | MFT_OWNERDRAW | MFT_RADIOCHECK | MFT_RIGHTORDER | MFT_RIGHTJUSTIFY);
    if (type == MFT_STRING) {
        LPTSTR buffer = (LPTSTR)malloc(++info->cch * sizeof(TCHAR));
        if (!buffer) {
            free(info);
            return 0;
        }
        info->dwTypeData = buffer;
        ::GetMenuItemInfo(menu, id, byPosition, info);
    }
    
    return new ContextMenuItem(info);
}

ContextMenuItem* ContextMenu::itemWithAction(unsigned action)
{
    return contextMenuItemByIdOrPosition(m_platformDescription, action, FALSE);
}

ContextMenuItem* ContextMenu::itemAtIndex(unsigned index, const PlatformMenuDescription platformDescription)
{
    return contextMenuItemByIdOrPosition(platformDescription, index, TRUE);
}

void ContextMenu::setPlatformDescription(HMENU menu)
{
    if (menu == m_platformDescription)
        return;
    
    if (m_platformDescription)
        ::DestroyMenu(m_platformDescription);

    m_platformDescription = menu;
    if (!m_platformDescription)
        return;

    MENUINFO menuInfo = {0};
    menuInfo.cbSize = sizeof(MENUINFO);
    menuInfo.fMask = MIM_STYLE;
    ::GetMenuInfo(m_platformDescription, &menuInfo);
    menuInfo.fMask = MIM_STYLE;
    menuInfo.dwStyle |= MNS_NOTIFYBYPOS;
    ::SetMenuInfo(m_platformDescription, &menuInfo);
}

HMENU ContextMenu::platformDescription() const
{
    return m_platformDescription;
}

HMENU ContextMenu::releasePlatformDescription()
{
    HMENU description = m_platformDescription;
    m_platformDescription = 0;
    return description;
}

}