/*
- 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.
-
+ * PROJECT: ReactOS Screen Saver Library
+ * LICENSE: GPL v2 or any later version
+ * FILE: lib/sdk/scrnsave/scrnsave.c
+ * PURPOSE: Library for writing screen savers, compatible with MS' scrnsave.lib
+ * PROGRAMMERS: Anders Norlander <anorland@hem2.passagen.se>
+ * Colin Finck <mail@colinfinck.de>
*/
+
#include <windows.h>
+#include <tchar.h>
#include <scrnsave.h>
-#include <regstr.h>
-/* screen saver window class */
+// 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;
+// 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 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)
+
+static int ISSPACE(TCHAR c)
{
- return (c == ' ' || c == '\t');
+ return (c == ' ' || c == '\t');
}
#define ISNUM(c) ((c) >= '0' && c <= '9')
-static unsigned long
-_toul(const char *s)
+
+static ULONG_PTR _toulptr(const TCHAR *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;
+ ULONG_PTR res;
+ ULONG_PTR n;
+ const TCHAR *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)
+// This function takes care of *must* do tasks, like terminating screen saver
+static LRESULT WINAPI SysScreenSaverProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
- LPSTR p;
- OSVERSIONINFO vi;
+ switch(uMsg)
+ {
+ case WM_CREATE:
+ // Mouse is not supposed to move from this position
+ GetCursorPos(&pt_orig);
+ break;
- /* initialize */
- hMainInstance = hInst;
+ case WM_DESTROY:
+ PostQuitMessage(0);
+ break;
- 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)
+ case WM_SYSCOMMAND:
+ if (!fChildPreview)
{
- hPwdLib = LoadLibrary(TEXT("PASSWORD.CPL"));
- if (hPwdLib)
- VerifyScreenSavePwd = GetProcAddress(hPwdLib, szVerifyPassword);
+ switch (wParam)
+ {
+ case SC_CLOSE:
+ case SC_SCREENSAVE:
+ return FALSE;
+ }
}
- RegCloseKey(hKey);
- }
+ break;
}
- /* parse arguments */
- for (p = CmdLine; *p; p++)
+ return ScreenSaverProc(hWnd, uMsg, wParam, lParam);
+}
+
+LRESULT WINAPI DefScreenSaverProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+ // Don't do any special processing when in preview mode
+ if (fChildPreview)
+ return DefWindowProc(hWnd, uMsg, wParam, lParam);
+
+ switch (uMsg)
{
- switch (*p)
+ case WM_NCACTIVATE:
+ case WM_ACTIVATE:
+ case WM_ACTIVATEAPP:
+ if (!wParam)
+ {
+ // wParam is FALSE, so the screensaver is losing the focus.
+ PostMessage(hWnd, WM_CLOSE, 0, 0);
+ }
+ break;
+
+ case WM_MOUSEMOVE:
{
- 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:
- break;
+ POINT pt;
+ GetCursorPos(&pt);
+ if (pt.x == pt_orig.x && pt.y == pt_orig.y)
+ break;
+
+ // Fall through
}
+
+ case WM_LBUTTONDOWN:
+ case WM_RBUTTONDOWN:
+ case WM_MBUTTONDOWN:
+ case WM_KEYDOWN:
+ case WM_KEYUP:
+ // Send a WM_CLOSE to close the screen saver (allows the screensaver author to do clean-up tasks)
+ PostMessage(hWnd, WM_CLOSE, 0, 0);
+ break;
+
+ case WM_SETCURSOR:
+ SetCursor(NULL);
+ return TRUE;
}
- LaunchConfig();
- return 0;
+
+ return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
-static void LaunchConfig(void)
+// Registers the screen saver window class
+static BOOL RegisterScreenSaverClass(void)
{
- /* FIXME: should this be called */
- RegisterDialogClasses(hMainInstance);
- /* display configure dialog */
- DialogBox(hMainInstance, MAKEINTRESOURCE(DLG_SCRNSAVECONFIGURE),
- GetForegroundWindow(), (DLGPROC) ScreenSaverConfigureDialog);
+ WNDCLASS cls = {0,};
+
+ cls.hIcon = LoadIcon(hMainInstance, MAKEINTATOM(ID_APP));
+ cls.lpszClassName = CLASS_SCRNSAVE;
+ cls.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
+ cls.hInstance = hMainInstance;
+ cls.style = CS_VREDRAW | CS_HREDRAW | CS_SAVEBITS | CS_PARENTDC;
+ cls.lpfnWndProc = (WNDPROC)SysScreenSaverProc;
+
+ return RegisterClass(&cls) != 0;
}
+static void LaunchConfig(void)
+{
+ // Only show the dialog if the RegisterDialogClasses function succeeded.
+ // This is the same behaviour as MS' scrnsave.lib.
+ if( RegisterDialogClasses(hMainInstance) )
+ 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;
+ UINT style;
+ RECT rc;
+ MSG msg;
- /* register classes, both user defined and classes used by screen saver
- library */
- if (!RegisterClasses())
+ if (!RegisterScreenSaverClass())
{
- MessageBox(NULL, TEXT("RegisterClasses() failed"), NULL, MB_ICONHAND);
- goto restore;
+ MessageBox(NULL, TEXT("RegisterClass() failed"), NULL, MB_ICONHAND);
+ return 1;
}
- /* a slightly different approach needs to be used when displaying
- in a preview window */
- if (hParent)
+ // A slightly different approach needs to be used when displaying in a preview window
+ if (hParent)
{
- style = WS_CHILD;
- GetClientRect(hParent, &rc);
+ style = WS_CHILD;
+ GetClientRect(hParent, &rc);
}
- else
+ else
{
- style = WS_POPUP;
- rc.right = GetSystemMetrics(SM_CXSCREEN);
- rc.bottom = GetSystemMetrics(SM_CYSCREEN);
- style |= WS_VISIBLE;
+ style = WS_POPUP;
+ rc.right = GetSystemMetrics(SM_CXVIRTUALSCREEN);
+ rc.bottom = GetSystemMetrics(SM_CYVIRTUALSCREEN);
+ 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);
+ // Create the 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);
+ if(!hMainWindow)
+ return 1;
- while (GetMessage(&msg, NULL, 0, 0) == TRUE)
- {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- }
+ // Display window and start pumping messages
+ ShowWindow(hMainWindow, SW_SHOW);
+ if (!hParent)
+ SetCursor(NULL);
-restore:
- /* restore system */
- if (w95 && !fChildPreview)
- SystemParametersInfo(SPI_SCREENSAVERRUNNING, FALSE, &foo, 0);
- FreeLibrary(hPwdLib);
- return msg.wParam;
-}
+ while (GetMessage(&msg, NULL, 0, 0))
+ DispatchMessage(&msg);
-/* 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);
+ return msg.wParam;
}
-LONG WINAPI DefScreenSaverProc(HWND hWnd, UINT msg,
- WPARAM wParam, LPARAM lParam)
+// Screen Saver entry point
+int APIENTRY _tWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPTSTR CmdLine, int nCmdShow)
{
- /* don't do any special processing when in preview mode */
- if (fChildPreview || closing)
- return DefWindowProc(hWnd, msg, wParam, lParam);
+ LPTSTR p;
- 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);
-}
+ UNREFERENCED_PARAMETER(nCmdShow);
+ UNREFERENCED_PARAMETER(hPrevInst);
-static void TerminateScreenSaver(HWND hWnd)
-{
- /* don't allow recursion */
- if (checking_pwd || closing)
- return;
+ hMainInstance = hInst;
- /* verify password */
- if (VerifyScreenSavePwd)
+ // Parse the arguments
+ for (p = CmdLine; *p; p++)
{
- checking_pwd = TRUE;
- closing = SendMessage(hWnd, SCRM_VERIFYPW, 0, 0);
- checking_pwd = FALSE;
- }
- else
- closing = TRUE;
+ switch (*p)
+ {
+ case 'S':
+ case 's':
+ // Start the screen saver
+ return LaunchScreenSaver(NULL);
- /* are we closing? */
- if (closing)
- {
- DestroyWindow(hWnd);
- }
- else
- GetCursorPos(&pt_orig); /* if not: get new mouse position */
-}
+ case 'P':
+ case 'p':
+ {
+ // Start the screen saver in preview mode
+ HWND hParent;
+ fChildPreview = TRUE;
-/*
- Register screen saver window class and call user
- supplied hook.
- */
-static BOOL RegisterClasses(void)
-{
- WNDCLASS cls;
- ZeroMemory(&cls, sizeof(cls));
- cls.hCursor = NULL;
- cls.hIcon = LoadIcon(hMainInstance, MAKEINTATOM(ID_APP));
- cls.lpszMenuName = NULL;
- cls.lpszClassName = CLASS_SCRNSAVE;
- cls.hbrBackground = NULL; //(HBRUSH)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);
-}
+ while (ISSPACE(*++p));
+ hParent = (HWND) _toulptr(p);
-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);
+ if (hParent && IsWindow(hParent))
+ return LaunchScreenSaver(hParent);
+ }
+ return 0;
+
+ case 'C':
+ case 'c':
+ // Display the configuration dialog
+ LaunchConfig();
+ return 0;
+
+ case '-':
+ case '/':
+ case ' ':
+ default:
+ break;
+ }
+ }
- /* change password for screen saver provider */
- if (ChangePassword)
- ChangePassword(TEXT("SCRSAVE"), hParent, 0, NULL);
+ LaunchConfig();
- FreeLibrary(hMpr);
- }
+ return 0;
}
-
projects / reactos.git / blobdiff