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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <qsettings.h>
#include <qdir.h>
#include <private/qsystemlibrary_p.h>
#include <qurl.h>
#include <qstringlist.h>
#include <qprocess.h>
#include <qtemporaryfile.h>
#include <qcoreapplication.h>

#include <qt_windows.h>
#include <shlobj.h>
#if !defined(Q_OS_WINCE)
#  include <intshcut.h>
#else
#  include <qguifunctions_wince.h>
#  if !defined(STANDARDSHELL_UI_MODEL)
#    include <winx.h>
#  endif
#endif

#ifndef CSIDL_MYMUSIC
#define CSIDL_MYMUSIC	13
#define CSIDL_MYVIDEO	14
#endif

#ifndef QT_NO_DESKTOPSERVICES

QT_BEGIN_NAMESPACE

static bool openDocument(const QUrl &file)
{
    if (!file.isValid())
        return false;
    QString filePath = file.toLocalFile();
    if (filePath.isEmpty())
        filePath = file.toString();
    quintptr returnValue = (quintptr)ShellExecute(0, 0, (wchar_t*)filePath.utf16(), 0, 0, SW_SHOWNORMAL);
    return (returnValue > 32); //ShellExecute returns a value greater than 32 if successful
}

static QString expandEnvStrings(const QString &command)
{
#if defined(Q_OS_WINCE)
    return command;
#else
    wchar_t buffer[MAX_PATH];
    if (ExpandEnvironmentStrings((wchar_t*)command.utf16(), buffer, MAX_PATH))
        return QString::fromWCharArray(buffer);
    else
        return command;
#endif
}

static bool launchWebBrowser(const QUrl &url)
{
    if (url.scheme() == QLatin1String("mailto")) {
        //Retrieve the commandline for the default mail client
        //the default key used below is the command line for the mailto: shell command
        DWORD  bufferSize = sizeof(wchar_t) * MAX_PATH;
        long  returnValue =  -1;
        QString command;

        HKEY handle;
        LONG res;
        wchar_t keyValue[MAX_PATH] = {0};
        QString keyName(QLatin1String("mailto"));

        //Check if user has set preference, otherwise use default.
        res = RegOpenKeyEx(HKEY_CURRENT_USER,
                           L"Software\\Microsoft\\Windows\\Shell\\Associations\\UrlAssociations\\mailto\\UserChoice",
                           0, KEY_READ, &handle);
        if (res == ERROR_SUCCESS) {
            returnValue = RegQueryValueEx(handle, L"Progid", 0, 0, reinterpret_cast<unsigned char*>(keyValue), &bufferSize);
            if (!returnValue)
                keyName = QString::fromUtf16((const ushort*)keyValue);
            RegCloseKey(handle);
        }
        keyName += QLatin1String("\\Shell\\Open\\Command");
        res = RegOpenKeyExW(HKEY_CLASSES_ROOT, (const wchar_t*)keyName.utf16(), 0, KEY_READ, &handle);
        if (res != ERROR_SUCCESS)
            return false;

        bufferSize = sizeof(wchar_t) * MAX_PATH;
        returnValue = RegQueryValueEx(handle, L"", 0, 0, reinterpret_cast<unsigned char*>(keyValue), &bufferSize);
        if (!returnValue)
            command = QString::fromRawData((QChar*)keyValue, bufferSize);
        RegCloseKey(handle);

        if (returnValue)
            return false;

        command = expandEnvStrings(command);
        command = command.trimmed();
        //Make sure the path for the process is in quotes
        int index = -1 ;
        if (command[0]!= QLatin1Char('\"')) {
            index = command.indexOf(QLatin1String(".exe "), 0, Qt::CaseInsensitive);
            command.insert(index+4, QLatin1Char('\"'));
            command.insert(0, QLatin1Char('\"'));
        }
        //pass the url as the parameter
        index =  command.lastIndexOf(QLatin1String("%1"));
        if (index != -1){
            command.replace(index, 2, url.toString());
        }
        //start the process
        PROCESS_INFORMATION pi;
        ZeroMemory(&pi, sizeof(pi));
        STARTUPINFO si;
        ZeroMemory(&si, sizeof(si));
        si.cb = sizeof(si);

        returnValue = CreateProcess(NULL, (wchar_t*)command.utf16(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);

        if (!returnValue)
            return false;

        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);
        return true;
    }

    if (!url.isValid())
        return false;

    if (url.scheme().isEmpty())
        return openDocument(url);

    quintptr returnValue = (quintptr)ShellExecute(0, 0, (wchar_t *)QString::fromUtf8(url.toEncoded().constData()).utf16(),
                                                  0, 0, SW_SHOWNORMAL);
    return (returnValue > 32);
}

QString QDesktopServices::storageLocation(StandardLocation type)
{
    QString result;

#ifndef Q_OS_WINCE
        QSystemLibrary library(QLatin1String("shell32"));
#else
        QSystemLibrary library(QLatin1String("coredll"));
#endif // Q_OS_WINCE
    typedef BOOL (WINAPI*GetSpecialFolderPath)(HWND, LPWSTR, int, BOOL);
    static GetSpecialFolderPath SHGetSpecialFolderPath =
            (GetSpecialFolderPath)library.resolve("SHGetSpecialFolderPathW");
    if (!SHGetSpecialFolderPath)
        return QString();

    wchar_t path[MAX_PATH];

    switch (type) {
    case DataLocation:
#if defined Q_WS_WINCE
        if (SHGetSpecialFolderPath(0, path, CSIDL_APPDATA, FALSE))
#else
        if (SHGetSpecialFolderPath(0, path, CSIDL_LOCAL_APPDATA, FALSE))
#endif
            result = QString::fromWCharArray(path);
        if (!QCoreApplication::organizationName().isEmpty())
            result = result + QLatin1String("\\") + QCoreApplication::organizationName();
        if (!QCoreApplication::applicationName().isEmpty())
            result = result + QLatin1String("\\") + QCoreApplication::applicationName();
        break;

    case DesktopLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_DESKTOPDIRECTORY, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case DocumentsLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_PERSONAL, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case FontsLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_FONTS, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case ApplicationsLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_PROGRAMS, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case MusicLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_MYMUSIC, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case MoviesLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_MYVIDEO, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case PicturesLocation:
        if (SHGetSpecialFolderPath(0, path, CSIDL_MYPICTURES, FALSE))
            result = QString::fromWCharArray(path);
        break;

    case CacheLocation:
        // Although Microsoft has a Cache key it is a pointer to IE's cache, not a cache
        // location for everyone.  Most applications seem to be using a
        // cache directory located in their AppData directory
        return storageLocation(DataLocation) + QLatin1String("\\cache");

    case QDesktopServices::HomeLocation:
        return QDir::homePath(); break;

    case QDesktopServices::TempLocation:
        return QDir::tempPath(); break;

    default:
        break;
    }
    return result;
}

QString QDesktopServices::displayName(StandardLocation type)
{
    Q_UNUSED(type);
    return QString();
}

QT_END_NAMESPACE

#endif // QT_NO_DESKTOPSERVICES