diff options
author | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:38:33 +0300 |
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committer | Christopher Faylor <me@cgf.cx> | 2000-02-17 22:38:33 +0300 |
commit | 1fd5e000ace55b323124c7e556a7a864b972a5c4 (patch) | |
tree | dc4fcf1e5e22a040716ef92c496b8d94959b2baa /winsup/w32api/lib/scrnsave.c | |
parent | 369d8a8fd5e887eca547bf34bccfdf755c9e5397 (diff) |
import winsup-2000-02-17 snapshot
Diffstat (limited to 'winsup/w32api/lib/scrnsave.c')
-rw-r--r-- | winsup/w32api/lib/scrnsave.c | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/winsup/w32api/lib/scrnsave.c b/winsup/w32api/lib/scrnsave.c new file mode 100644 index 000000000..ddad88409 --- /dev/null +++ b/winsup/w32api/lib/scrnsave.c @@ -0,0 +1,406 @@ +/* + Screen saver library by Anders Norlander <anorland@hem2.passagen.se> + + This library is (hopefully) compatible with Microsoft's + screen saver library. + + This is public domain software. + + */ +#include <windows.h> +#include <scrnsave.h> +#include <regstr.h> + +/* screen saver window class */ +#define CLASS_SCRNSAVE TEXT("WindowsScreenSaverClass") + +/* globals */ +HWND hMainWindow = NULL; +BOOL fChildPreview = FALSE; +HINSTANCE hMainInstance; +TCHAR szName[TITLEBARNAMELEN]; +TCHAR szAppName[APPNAMEBUFFERLEN]; +TCHAR szIniFile[MAXFILELEN]; +TCHAR szScreenSaver[22]; +TCHAR szHelpFile[MAXFILELEN]; +TCHAR szNoHelpMemory[BUFFLEN]; +UINT MyHelpMessage; + +/* local house keeping */ +static HINSTANCE hPwdLib = NULL; +static POINT pt_orig; +static BOOL checking_pwd = FALSE; +static BOOL closing = FALSE; +static BOOL w95 = FALSE; + +typedef BOOL (WINAPI *VERIFYPWDPROC)(HWND); +typedef DWORD (WINAPI *CHPWDPROC)(LPCTSTR, HWND, DWORD, PVOID); +static VERIFYPWDPROC VerifyScreenSavePwd = NULL; + +/* function names */ +#define szVerifyPassword "VerifyScreenSavePwd" + +#ifdef UNICODE +#define szPwdChangePassword "PwdChangePasswordW" +#else +#define szPwdChangePassword "PwdChangePasswordA" +#endif + +static void TerminateScreenSaver(HWND hWnd); +static BOOL RegisterClasses(void); +static LRESULT WINAPI SysScreenSaverProc(HWND,UINT,WPARAM,LPARAM); +static int LaunchScreenSaver(HWND hParent); +static void LaunchConfig(void); + +static int ISSPACE(char c) +{ + return (c == ' ' || c == '\t'); +} + +#define ISNUM(c) ((c) >= '0' && c <= '9') +static unsigned long +_toul(const char *s) +{ + unsigned long res; + unsigned long n; + const char *p; + for (p = s; *p; p++) + if (!ISNUM(*p)) break; + p--; + res = 0; + for (n = 1; p >= s; p--, n *= 10) + res += (*p - '0') * n; + return res; +} + +/* screen saver entry point */ +int APIENTRY WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, + LPSTR CmdLine, int nCmdShow) +{ + LPSTR p; + OSVERSIONINFO vi; + + /* initialize */ + hMainInstance = hInst; + + vi.dwOSVersionInfoSize = sizeof(vi); + GetVersionEx(&vi); + /* check if we are going to check for passwords */ + if (vi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) + { + HKEY hKey; + /* we are using windows 95 */ + w95 = TRUE; + if (RegOpenKey(HKEY_CURRENT_USER, REGSTR_PATH_SCREENSAVE ,&hKey) == + ERROR_SUCCESS) + { + DWORD check_pwd; + DWORD size = sizeof(DWORD); + DWORD type; + LONG res; + res = RegQueryValueEx(hKey, REGSTR_VALUE_USESCRPASSWORD, + NULL, &type, (PBYTE) &check_pwd, &size); + if (check_pwd && res == ERROR_SUCCESS) + { + hPwdLib = LoadLibrary(TEXT("PASSWORD.CPL")); + if (hPwdLib) + VerifyScreenSavePwd = GetProcAddress(hPwdLib, szVerifyPassword); + } + RegCloseKey(hKey); + } + } + + /* parse arguments */ + for (p = CmdLine; *p; p++) + { + switch (*p) + { + case 'S': + case 's': + /* start screen saver */ + return LaunchScreenSaver(NULL); + + case 'P': + case 'p': + { + /* start screen saver in preview window */ + HWND hParent; + fChildPreview = TRUE; + while (ISSPACE(*++p)); + hParent = (HWND) _toul(p); + if (hParent && IsWindow(hParent)) + return LaunchScreenSaver(hParent); + } + return 0; + + case 'C': + case 'c': + /* display configure dialog */ + LaunchConfig(); + return 0; + + case 'A': + case 'a': + { + /* change screen saver password */ + HWND hParent; + while (ISSPACE(*++p)); + hParent = (HWND) _toul(p); + if (!hParent || !IsWindow(hParent)) + hParent = GetForegroundWindow(); + ScreenSaverChangePassword(hParent); + } + return 0; + + case '-': + case '/': + case ' ': + default: + } + } + LaunchConfig(); + return 0; +} + +static void LaunchConfig(void) +{ + /* FIXME: should this be called */ + RegisterDialogClasses(hMainInstance); + /* display configure dialog */ + DialogBox(hMainInstance, MAKEINTRESOURCE(DLG_SCRNSAVECONFIGURE), + GetForegroundWindow(), (DLGPROC) ScreenSaverConfigureDialog); +} + + +static int LaunchScreenSaver(HWND hParent) +{ + BOOL foo; + UINT style; + RECT rc; + MSG msg; + + /* don't allow other tasks to get into the foreground */ + if (w95 && !fChildPreview) + SystemParametersInfo(SPI_SCREENSAVERRUNNING, TRUE, &foo, 0); + + msg.wParam = 0; + + /* register classes, both user defined and classes used by screen saver + library */ + if (!RegisterClasses()) + { + MessageBox(NULL, TEXT("RegisterClasses() failed"), NULL, MB_ICONHAND); + goto restore; + } + + /* a slightly different approach needs to be used when displaying + in a preview window */ + if (hParent) + { + style = WS_CHILD; + GetClientRect(hParent, &rc); + } + else + { + style = WS_POPUP; + rc.right = GetSystemMetrics(SM_CXSCREEN); + rc.bottom = GetSystemMetrics(SM_CYSCREEN); + style |= WS_VISIBLE; + } + + /* create main screen saver window */ + hMainWindow = CreateWindowEx(hParent ? 0 : WS_EX_TOPMOST, CLASS_SCRNSAVE, + TEXT("SCREENSAVER"), style, + 0, 0, rc.right, rc.bottom, hParent, NULL, + hMainInstance, NULL); + + /* display window and start pumping messages */ + if (hMainWindow) + { + UpdateWindow(hMainWindow); + ShowWindow(hMainWindow, SW_SHOW); + + while (GetMessage(&msg, NULL, 0, 0) == TRUE) + { + TranslateMessage(&msg); + DispatchMessage(&msg); + } + } + +restore: + /* restore system */ + if (w95 && !fChildPreview) + SystemParametersInfo(SPI_SCREENSAVERRUNNING, FALSE, &foo, 0); + FreeLibrary(hPwdLib); + return msg.wParam; +} + +/* this function takes care of *must* do tasks, like terminating + screen saver */ +static LRESULT WINAPI SysScreenSaverProc(HWND hWnd, UINT msg, + WPARAM wParam, LPARAM lParam) +{ + switch (msg) + { + case WM_CREATE: + if (!fChildPreview) + SetCursor(NULL); + /* mouse is not supposed to move from this position */ + GetCursorPos(&pt_orig); + break; + case WM_DESTROY: + PostQuitMessage(0); + break; + case WM_TIMER: + if (closing) + return 0; + break; + case WM_PAINT: + if (closing) + return DefWindowProc(hWnd, msg, wParam, lParam); + break; + case WM_SYSCOMMAND: + if (!fChildPreview) + switch (wParam) + { + case SC_CLOSE: + case SC_SCREENSAVE: + case SC_NEXTWINDOW: + case SC_PREVWINDOW: + return FALSE; + } + break; + case WM_MOUSEMOVE: + case WM_LBUTTONDOWN: + case WM_RBUTTONDOWN: + case WM_MBUTTONDOWN: + case WM_KEYDOWN: + case WM_SYSKEYDOWN: + case WM_NCACTIVATE: + case WM_ACTIVATE: + case WM_ACTIVATEAPP: + if (closing) + return DefWindowProc(hWnd, msg, wParam, lParam); + break; + } + return ScreenSaverProc(hWnd, msg, wParam, lParam); +} + +LONG WINAPI DefScreenSaverProc(HWND hWnd, UINT msg, + WPARAM wParam, LPARAM lParam) +{ + /* don't do any special processing when in preview mode */ + if (fChildPreview || closing) + return DefWindowProc(hWnd, msg, wParam, lParam); + + switch (msg) + { + case WM_CLOSE: + TerminateScreenSaver(hWnd); + /* do NOT pass this to DefWindowProc; it will terminate even if + an invalid password was given. + */ + return 0; + case SCRM_VERIFYPW: + /* verify password or return TRUE if password checking is turned off */ + if (VerifyScreenSavePwd) + return VerifyScreenSavePwd(hWnd); + else + return TRUE; + case WM_SETCURSOR: + if (checking_pwd) + break; + SetCursor(NULL); + return TRUE; + case WM_NCACTIVATE: + case WM_ACTIVATE: + case WM_ACTIVATEAPP: + if (wParam != FALSE) + break; + case WM_MOUSEMOVE: + { + POINT pt; + GetCursorPos(&pt); + if (pt.x == pt_orig.x && pt.y == pt_orig.y) + break; + } + case WM_LBUTTONDOWN: + case WM_RBUTTONDOWN: + case WM_MBUTTONDOWN: + case WM_KEYDOWN: + case WM_SYSKEYDOWN: + /* try to terminate screen saver */ + if (!checking_pwd) + PostMessage(hWnd, WM_CLOSE, 0, 0); + break; + } + return DefWindowProc(hWnd, msg, wParam, lParam); +} + +static void TerminateScreenSaver(HWND hWnd) +{ + /* don't allow recursion */ + if (checking_pwd || closing) + return; + + /* verify password */ + if (VerifyScreenSavePwd) + { + checking_pwd = TRUE; + closing = SendMessage(hWnd, SCRM_VERIFYPW, 0, 0); + checking_pwd = FALSE; + } + else + closing = TRUE; + + /* are we closing? */ + if (closing) + { + DestroyWindow(hWnd); + } + else + GetCursorPos(&pt_orig); /* if not: get new mouse position */ +} + +/* + Register screen saver window class and call user + supplied hook. + */ +static BOOL RegisterClasses(void) +{ + WNDCLASS cls; + + cls.hCursor = NULL; + cls.hIcon = LoadIcon(hMainInstance, MAKEINTATOM(ID_APP)); + cls.lpszMenuName = NULL; + cls.lpszClassName = CLASS_SCRNSAVE; + cls.hbrBackground = GetStockObject(BLACK_BRUSH); + cls.hInstance = hMainInstance; + cls.style = CS_VREDRAW | CS_HREDRAW | CS_SAVEBITS | CS_PARENTDC; + cls.lpfnWndProc = (WNDPROC) SysScreenSaverProc; + cls.cbWndExtra = 0; + cls.cbClsExtra = 0; + + if (!RegisterClass(&cls)) + return FALSE; + + return RegisterDialogClasses(hMainInstance); +} + +void WINAPI ScreenSaverChangePassword(HWND hParent) +{ + /* load Master Password Router (MPR) */ + HINSTANCE hMpr = LoadLibrary(TEXT("MPR.DLL")); + + if (hMpr) + { + CHPWDPROC ChangePassword; + ChangePassword = (CHPWDPROC) GetProcAddress(hMpr, szPwdChangePassword); + + /* change password for screen saver provider */ + if (ChangePassword) + ChangePassword(TEXT("SCRSAVE"), hParent, 0, NULL); + + FreeLibrary(hMpr); + } +} |