screensaver.c

winNT技术操作系统,国外开放的原代码和LIUX一样

/* $Id: screensaver.c 24836 2006-11-26 12:47:56Z ekohl $
 *
 * COPYRIGHT:       See COPYING in the top level directory
 * PROJECT:         ReactOS Display Control Panel
 * FILE:            lib/cpl/desk/screensaver.c
 * PURPOSE:         Screen saver property page
 * 
 * PROGRAMMERS:     Trevor McCort ([e-mail])
 */

#include "desk.h"


#define MAX_SCREENSAVERS 100

typedef struct
{
    BOOL  bIsScreenSaver; /* Is this background a wallpaper */
    TCHAR szFilename[MAX_PATH];
    TCHAR szDisplayName[256];
} ScreenSaverItem;


typedef struct _GLOBAL_DATA
{
    ScreenSaverItem g_ScreenSaverItems[MAX_SCREENSAVERS];
    int ImageListSelection;
    HMENU g_hPopupMenu;
} GLOBAL_DATA, *PGLOBAL_DATA;



static VOID
ListViewItemAreChanged(HWND hwndDlg, PGLOBAL_DATA pGlobalData, int itemIndex)
{
    BOOL bEnable;
    LV_ITEM lvItem;

    lvItem.mask = LVIF_PARAM;
    lvItem.iItem = itemIndex;
    lvItem.iSubItem = 0;

    if (!ListView_GetItem(GetDlgItem(hwndDlg, IDC_SCREENS_CHOICES), &lvItem))
        return;

    pGlobalData->ImageListSelection = lvItem.lParam;

    bEnable = (lvItem.lParam != 0);

    EnableWindow(GetDlgItem(hwndDlg, IDC_SCREENS_SETTINGS), bEnable);
    EnableWindow(GetDlgItem(hwndDlg, IDC_SCREENS_TESTSC), bEnable);
    EnableWindow(GetDlgItem(hwndDlg, IDC_SCREENS_USEPASSCHK), bEnable);
    EnableWindow(GetDlgItem(hwndDlg, IDC_SCREENS_TIMEDELAY), bEnable);
    EnableWindow(GetDlgItem(hwndDlg, IDC_SCREENS_TIME), bEnable);
}


static VOID
ScreensaverConfig(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
{
    /*
       /p:<hwnd>  Run in preview 
       /s         Run normal
       /c:<hwnd>  Run configuration, hwnd is handle of calling window
       /a         Run change password
    */

    WCHAR szCmdline[2048];
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    if (pGlobalData->ImageListSelection < 1)
        return;

    swprintf(szCmdline, L"%s /c:%u",
             pGlobalData->g_ScreenSaverItems[pGlobalData->ImageListSelection].szFilename,
             hwndDlg);

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));
    if(CreateProcess(NULL, szCmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
    {
        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);
    }
}


static VOID
ScreensaverPreview(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
{
    /*
       /p:<hwnd>  Run in preview
       /s         Run normal
       /c:<hwnd>  Run configuration, hwnd is handle of calling window
       /a         Run change password
    */

    WCHAR szCmdline[2048];
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    if (pGlobalData->ImageListSelection < 1)
        return;

    swprintf(szCmdline, L"%s /p",
             pGlobalData->g_ScreenSaverItems[pGlobalData->ImageListSelection].szFilename);

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));
    if(CreateProcess(NULL, szCmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
    {
        CloseHandle(pi.hProcess);
        CloseHandle(pi.hThread);
    }
}


static VOID
ScreensaverDelete(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
{
    SHFILEOPSTRUCT fos;

    if (pGlobalData->ImageListSelection < 1) // Can NOT delete anything :-)
        return;

    fos.hwnd = hwndDlg;
    fos.wFunc = FO_DELETE;
    fos.fFlags = 0;
    fos.pFrom = pGlobalData->g_ScreenSaverItems[pGlobalData->ImageListSelection].szFilename;

    SHFileOperationW(&fos);
}


static VOID
CheckRegScreenSaverIsSecure(HWND hwndDlg)
{
    HKEY hKey;
    TCHAR szBuffer[2];
    DWORD bufferSize = sizeof(szBuffer);
    DWORD varType = REG_SZ;
    LONG result;

    RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop"), 0, KEY_ALL_ACCESS, &hKey);
    result = RegQueryValueEx(hKey, TEXT("ScreenSaverIsSecure"), 0, &varType, (LPBYTE)szBuffer, &bufferSize);
    RegCloseKey(hKey);

    if (result == ERROR_SUCCESS)
    {
        if (_ttoi(szBuffer) == 1)
        {
            SendDlgItemMessage(hwndDlg, IDC_SCREENS_USEPASSCHK, BM_SETCHECK, (WPARAM)BST_CHECKED, 0);
            return;
        }
    }

    SendDlgItemMessage(hwndDlg, IDC_SCREENS_USEPASSCHK, BM_SETCHECK, (WPARAM)BST_UNCHECKED, 0);
}


static VOID
AddListViewItems(HWND hwndDlg, PGLOBAL_DATA pGlobalData)
{
    HWND hwndScreenSaverList = GetDlgItem(hwndDlg, IDC_SCREENS_CHOICES);
    WIN32_FIND_DATA fd;
    HANDLE hFind;
    TCHAR szSearchPath[MAX_PATH];
    LV_ITEM listItem;
    LV_COLUMN dummy;
    RECT clientRect;
    //HKEY regKey;
    SHFILEINFO sfi;
    HIMAGELIST himl;
    HIMAGELIST hScreenShellImageList    = NULL;
    //TCHAR wallpaperFilename[MAX_PATH];
    //DWORD bufferSize = sizeof(wallpaperFilename);
    //DWORD varType = REG_SZ;
    //LONG result;
    UINT i = 0;
    int ScreenlistViewItemCount = 0;
    ScreenSaverItem *ScreenSaverItem = NULL;
    HANDLE hModule = NULL;

    GetClientRect(hwndScreenSaverList, &clientRect);

    ZeroMemory(&dummy, sizeof(LV_COLUMN));
    dummy.mask      = LVCF_SUBITEM | LVCF_WIDTH;
    dummy.iSubItem  = 0;
    dummy.cx        = (clientRect.right - clientRect.left) - GetSystemMetrics(SM_CXVSCROLL);

    (void)ListView_InsertColumn(hwndScreenSaverList, 0, &dummy);

    /* Add the "None" item */
    ScreenSaverItem = &pGlobalData->g_ScreenSaverItems[ScreenlistViewItemCount];

    ScreenSaverItem->bIsScreenSaver = FALSE;

    LoadString(hApplet,
               IDS_NONE,
               ScreenSaverItem->szDisplayName,
               sizeof(ScreenSaverItem->szDisplayName) / sizeof(TCHAR));

    ZeroMemory(&listItem, sizeof(LV_ITEM));
    listItem.mask       = LVIF_TEXT | LVIF_PARAM | LVIF_STATE | LVIF_IMAGE;
    listItem.state      = LVIS_SELECTED;
    listItem.pszText    = ScreenSaverItem->szDisplayName;
    listItem.iImage     = -1;
    listItem.iItem      = ScreenlistViewItemCount;
    listItem.lParam     = ScreenlistViewItemCount;

    (void)ListView_InsertItem(hwndScreenSaverList, &listItem);
    ListView_SetItemState(hwndScreenSaverList, ScreenlistViewItemCount, LVIS_SELECTED, LVIS_SELECTED);

    ScreenlistViewItemCount++;

    /* Add current screensaver if any */
/*
    RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Control Panel\\Desktop"), 0, KEY_ALL_ACCESS, &regKey);

    result = RegQueryValueEx(regKey, TEXT("SCRNSAVE.EXE"), 0, &varType, (LPBYTE)wallpaperFilename, &bufferSize);

    if ((result == ERROR_SUCCESS) && (_tcslen(wallpaperFilename) > 0))
    {
        himl = (HIMAGELIST)SHGetFileInfo(wallpaperFilename,
                                         0,
                                         &sfi,
                                         sizeof(sfi),
                                         SHGFI_SYSICONINDEX | SHGFI_SMALLICON |
                                         SHGFI_DISPLAYNAME);

        if (himl != NULL)
        {
            if (i++ == 0)
            {
                g_hScreenShellImageList = himl;
                (void)ListView_SetImageList(g_hScreengroundList, himl, LVSIL_SMALL);
            }

            ScreenSaverItem = &g_ScreenSaverItems[g_ScreenlistViewItemCount];
            
            ScreenSaverItem->bIsScreenSaver = TRUE;