1 /* xscreensaver, Copyright (c) 1993-2003 Jamie Zawinski <jwz@jwz.org>
3 * Permission to use, copy, modify, distribute, and sell this software and its
4 * documentation for any purpose is hereby granted without fee, provided that
5 * the above copyright notice appear in all copies and that both that
6 * copyright notice and this permission notice appear in supporting
7 * documentation. No representations are made about the suitability of this
8 * software for any purpose. It is provided "as is" without express or
12 #ifndef __XSCREENSAVER_H__
13 #define __XSCREENSAVER_H__
24 # include <signal.h> /* for sigset_t */
29 extern char *progname;
30 extern char *progclass;
32 typedef struct saver_info saver_info;
33 typedef struct saver_screen_info saver_screen_info;
34 typedef struct passwd_dialog_data passwd_dialog_data;
35 typedef struct splash_dialog_data splash_dialog_data;
38 #define countof(x) (sizeof((x))/sizeof((*x)))
42 /* This structure holds all the data that applies to the program as a whole,
43 or to the non-screen-specific parts of the display connection.
45 The saver_preferences structure (prefs.h) holds all the user-specified
46 parameters, read from the command line, the resource database, or entered
51 saver_preferences prefs;
54 saver_screen_info *screens;
55 saver_screen_info *default_screen; /* ...on which dialogs will appear. */
58 /* =======================================================================
59 global connection info
60 ======================================================================= */
65 /* =======================================================================
67 ======================================================================= */
69 Bool xinerama_p; /* Whether Xinerama is in use. */
70 Bool using_xidle_extension; /* which extension is being used. */
71 Bool using_mit_saver_extension; /* Note that `p->use_*' is the *request*, */
72 Bool using_sgi_saver_extension; /* and `si->using_*' is the *reality*. */
73 Bool using_proc_interrupts;
75 # ifdef HAVE_MIT_SAVER_EXTENSION
76 int mit_saver_ext_event_number;
77 int mit_saver_ext_error_number;
79 # ifdef HAVE_SGI_SAVER_EXTENSION
80 int sgi_saver_ext_event_number;
81 int sgi_saver_ext_error_number;
85 /* =======================================================================
87 ======================================================================= */
89 Bool screen_blanked_p; /* Whether the saver is currently active. */
90 Window mouse_grab_window; /* Window holding our mouse grab */
91 Window keyboard_grab_window; /* Window holding our keyboard grab */
92 int mouse_grab_screen; /* The screen number the mouse grab is on */
93 int keyboard_grab_screen; /* The screen number the keyboard grab is on */
94 Bool fading_possible_p; /* Whether fading to/from black is possible. */
95 Bool throttled_p; /* Whether we should temporarily just blank
96 the screen, not run hacks. */
97 time_t blank_time; /* The time at which the screen was blanked
98 (if currently blanked) or unblanked (if
102 /* =======================================================================
103 locking and runtime privileges
104 ======================================================================= */
106 Bool locked_p; /* Whether the screen is currently locked. */
107 Bool dbox_up_p; /* Whether the demo-mode or passwd dialogs
108 are currently visible */
110 Bool locking_disabled_p; /* Sometimes locking is impossible. */
111 char *nolock_reason; /* This is why. */
113 char *orig_uid; /* What uid/gid we had at startup, before
114 discarding privileges. */
115 char *uid_message; /* Any diagnostics from our attempt to
116 discard privileges (printed only in
118 Bool dangerous_uid_p; /* Set to true if we're running as a user id
119 which is known to not be a normal, non-
122 Window passwd_dialog; /* The password dialog, if its up. */
123 passwd_dialog_data *pw_data; /* Other info necessary to draw it. */
125 int unlock_failures; /* Counts failed login attempts while the
128 char *unlock_typeahead; /* If the screen is locked, and the user types
129 a character, we assume that it is the first
130 character of the password. It's stored here
131 for the password dialog to use to populate
135 /* =======================================================================
137 ======================================================================= */
139 Bool demoing_p; /* Whether we are demoing a single hack
142 Window splash_dialog; /* The splash dialog, if its up. */
143 splash_dialog_data *sp_data; /* Other info necessary to draw it. */
146 /* =======================================================================
148 ======================================================================= */
150 XtIntervalId lock_id; /* Timer to implement `prefs.lock_timeout' */
151 XtIntervalId cycle_id; /* Timer to implement `prefs.cycle' */
152 XtIntervalId timer_id; /* Timer to implement `prefs.timeout' */
153 XtIntervalId watchdog_id; /* Timer to implement `prefs.watchdog */
154 XtIntervalId check_pointer_timer_id; /* `prefs.pointer_timeout' */
156 time_t last_activity_time; /* Used only when no server exts. */
157 time_t last_wall_clock_time; /* Used to detect laptop suspend. */
158 saver_screen_info *last_activity_screen;
160 Bool emergency_lock_p; /* Set when the wall clock has jumped
161 (presumably due to laptop suspend) and we
162 need to lock down right away instead of
163 waiting for the lock timer to go off. */
166 /* =======================================================================
168 ======================================================================= */
170 int selection_mode; /* Set to -1 if the NEXT ClientMessage has just
171 been received; set to -2 if PREV has just
172 been received; set to N if SELECT or DEMO N
173 has been received. (This is kind of nasty.)
176 /* =======================================================================
178 ======================================================================= */
180 XtIntervalId stderr_popup_timer;
185 /* This structure holds all the data that applies to the screen-specific parts
186 of the display connection; if the display has multiple screens, there will
187 be one of these for each screen.
189 struct saver_screen_info {
192 int number; /* The internal ordinal of this screen,
193 counting Xinerama rectangles as separate
195 int real_screen_number; /* The number of the underlying X screen on
196 which this rectangle lies. */
197 Screen *screen; /* The X screen in question. */
199 int x, y, width, height; /* The size and position of this rectangle
200 on its underlying X screen. */
202 Bool real_screen_p; /* This will be true of exactly one ssi per
205 Widget toplevel_shell;
207 /* =======================================================================
209 ======================================================================= */
211 Window screensaver_window; /* The window that will impersonate the root,
212 when the screensaver activates. Note that
213 the window stored here may change, as we
214 destroy and recreate it on different
216 Colormap cmap; /* The colormap that goes with the window. */
217 Bool install_cmap_p; /* Whether this screen should have its own
218 colormap installed, for whichever of several
219 reasons. This is definitive (even a false
220 value here overrides prefs->install_cmap_p.)
222 Visual *current_visual; /* The visual of the window. */
223 int current_depth; /* How deep the visual (and the window) are. */
225 Visual *default_visual; /* visual to use when none other specified */
226 Visual *best_gl_visual; /* visual to use for GL hacks */
228 Window real_vroot; /* The original virtual-root window. */
229 Window real_vroot_value; /* What was in the __SWM_VROOT property. */
231 Cursor cursor; /* A blank cursor that goes with the
233 unsigned long black_pixel; /* Black, allocated from `cmap'. */
235 int blank_vp_x, blank_vp_y; /* Where the virtual-scrolling viewport was
236 when the screen went blank. We need to
237 prevent the X server from letting the mouse
238 bump the edges to scroll while the screen
239 is locked, so we reset to this when it has
240 moved, and the lock dialog is up... */
242 # ifdef HAVE_MIT_SAVER_EXTENSION
243 Window server_mit_saver_window;
247 /* =======================================================================
249 ======================================================================= */
251 Colormap demo_cmap; /* The colormap that goes with the dialogs:
252 this might be the same as `cmap' so care
253 must be taken not to free it while it's
256 /* =======================================================================
258 ======================================================================= */
260 int poll_mouse_last_root_x; /* Used only when no server exts. */
261 int poll_mouse_last_root_y;
262 Window poll_mouse_last_child;
263 unsigned int poll_mouse_last_mask;
266 /* =======================================================================
268 ======================================================================= */
270 int current_hack; /* Index into `prefs.screenhacks' */
275 int stderr_line_height;
276 XFontStruct *stderr_font;
278 Window stderr_overlay_window; /* Used if the server has overlay planes */
279 Colormap stderr_cmap;
285 /* =======================================================================
286 server extensions and virtual roots
287 ======================================================================= */
289 extern Bool restore_real_vroot (saver_info *si);
290 extern void disable_builtin_screensaver (saver_info *, Bool unblank_screen_p);
291 extern Bool ensure_no_screensaver_running (Display *, Screen *);
293 #ifdef HAVE_MIT_SAVER_EXTENSION
294 extern Bool query_mit_saver_extension (saver_info *);
296 #ifdef HAVE_SGI_SAVER_EXTENSION
297 extern Bool query_sgi_saver_extension (saver_info *);
299 #ifdef HAVE_XIDLE_EXTENSION
300 extern Bool query_xidle_extension (saver_info *);
302 #ifdef HAVE_PROC_INTERRUPTS
303 extern Bool query_proc_interrupts_available (saver_info *, const char **why);
306 /* Display Power Management System (DPMS) interface. */
307 extern Bool monitor_powered_on_p (saver_info *si);
308 extern void monitor_power_on (saver_info *si);
311 /* =======================================================================
313 ======================================================================= */
315 extern void initialize_screensaver_window (saver_info *si);
316 extern void raise_window (saver_info *si,
317 Bool inhibit_fade, Bool between_hacks_p,
319 extern Bool blank_screen (saver_info *si);
320 extern void unblank_screen (saver_info *si);
322 extern void get_screen_viewport (saver_screen_info *ssi,
323 int *x_ret, int *y_ret,
324 int *w_ret, int *h_ret,
325 int target_x, int target_y,
329 /* =======================================================================
331 ======================================================================= */
334 extern Bool unlock_p (saver_info *si);
335 extern Bool lock_priv_init (int argc, char **argv, Bool verbose_p);
336 extern Bool lock_init (int argc, char **argv, Bool verbose_p);
337 extern Bool passwd_valid_p (const char *typed_passwd, Bool verbose_p);
338 #endif /* NO_LOCKING */
340 extern void set_locked_p (saver_info *si, Bool locked_p);
341 extern int move_mouse_grab (saver_info *si, Window to, Cursor cursor,
343 extern int mouse_screen (saver_info *si);
346 /* =======================================================================
348 ======================================================================= */
350 extern void hack_uid (saver_info *si);
351 extern void describe_uids (saver_info *si, FILE *out);
353 /* =======================================================================
355 ======================================================================= */
357 extern void draw_shaded_rectangle (Display *dpy, Window window,
359 int width, int height,
361 unsigned long top_color,
362 unsigned long bottom_color);
363 extern int string_width (XFontStruct *font, char *s);
365 extern void make_splash_dialog (saver_info *si);
366 extern void handle_splash_event (saver_info *si, XEvent *e);
369 /* =======================================================================
371 ======================================================================= */
373 extern void start_notice_events_timer (saver_info *, Window, Bool verbose_p);
374 extern void cycle_timer (XtPointer si, XtIntervalId *id);
375 extern void activate_lock_timer (XtPointer si, XtIntervalId *id);
376 extern void reset_watchdog_timer (saver_info *si, Bool on_p);
377 extern void idle_timer (XtPointer si, XtIntervalId *id);
378 extern void sleep_until_idle (saver_info *si, Bool until_idle_p);
379 extern void reset_timers (saver_info *si);
381 /* =======================================================================
383 ======================================================================= */
385 extern Bool handle_clientmessage (saver_info *, XEvent *, Bool);
386 extern void maybe_reload_init_file (saver_info *);
388 /* =======================================================================
390 ======================================================================= */
392 extern void handle_signals (saver_info *si);
393 #ifdef HAVE_SIGACTION
394 extern sigset_t block_sigchld (void);
395 #else /* !HAVE_SIGACTION */
396 extern int block_sigchld (void);
397 #endif /* !HAVE_SIGACTION */
398 extern void unblock_sigchld (void);
399 extern void hack_environment (saver_info *si);
400 extern void hack_subproc_environment (saver_screen_info *ssi);
401 extern void init_sigchld (void);
402 extern void spawn_screenhack (saver_info *si, Bool first_time_p);
403 extern void kill_screenhack (saver_info *si);
404 extern void suspend_screenhack (saver_info *si, Bool suspend_p);
405 extern Bool screenhack_running_p (saver_info *si);
406 extern void emergency_kill_subproc (saver_info *si);
407 extern Bool select_visual (saver_screen_info *ssi, const char *visual_name);
408 extern void store_saver_status (saver_info *si);
409 extern const char *signal_name (int signal);
410 extern void exec_command (const char *shell, const char *command,
413 /* =======================================================================
415 ======================================================================= */
417 extern FILE *real_stderr;
418 extern FILE *real_stdout;
419 extern void initialize_stderr (saver_info *si);
420 extern void reset_stderr (saver_screen_info *ssi);
421 extern void clear_stderr (saver_screen_info *ssi);
422 extern void shutdown_stderr (saver_info *si);
425 /* =======================================================================
427 ======================================================================= */
429 extern const char *blurb (void);
430 extern void save_argv (int argc, char **argv);
431 extern void saver_exit (saver_info *si, int status, const char *core_reason);
432 extern void restart_process (saver_info *si);
434 extern int saver_ehandler (Display *dpy, XErrorEvent *error);
435 extern int BadWindow_ehandler (Display *dpy, XErrorEvent *error);
436 extern Bool window_exists_p (Display *dpy, Window window);
437 extern char *timestring (void);
438 extern Bool display_is_on_console_p (saver_info *si);
439 extern Visual *get_best_gl_visual (saver_screen_info *ssi);
440 extern void check_for_leaks (const char *where);
442 extern Atom XA_VROOT, XA_XSETROOT_ID, XA_ESETROOT_PMAP_ID, XA_XROOTPMAP_ID;
443 extern Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_ID;
444 extern Atom XA_SCREENSAVER_STATUS, XA_LOCK, XA_BLANK;
445 extern Atom XA_DEMO, XA_PREFS;
447 #endif /* __XSCREENSAVER_H__ */