1 /* xscreensaver, Copyright (c) 1993-2004 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;
84 int randr_event_number;
85 int randr_error_number;
89 /* =======================================================================
91 ======================================================================= */
93 Bool screen_blanked_p; /* Whether the saver is currently active. */
94 Window mouse_grab_window; /* Window holding our mouse grab */
95 Window keyboard_grab_window; /* Window holding our keyboard grab */
96 int mouse_grab_screen; /* The screen number the mouse grab is on */
97 int keyboard_grab_screen; /* The screen number the keyboard grab is on */
98 Bool fading_possible_p; /* Whether fading to/from black is possible. */
99 Bool throttled_p; /* Whether we should temporarily just blank
100 the screen, not run hacks. */
101 time_t blank_time; /* The time at which the screen was blanked
102 (if currently blanked) or unblanked (if
106 /* =======================================================================
107 locking and runtime privileges
108 ======================================================================= */
110 Bool locked_p; /* Whether the screen is currently locked. */
111 Bool dbox_up_p; /* Whether the demo-mode or passwd dialogs
112 are currently visible */
114 Bool locking_disabled_p; /* Sometimes locking is impossible. */
115 char *nolock_reason; /* This is why. */
117 char *orig_uid; /* What uid/gid we had at startup, before
118 discarding privileges. */
119 char *uid_message; /* Any diagnostics from our attempt to
120 discard privileges (printed only in
122 Bool dangerous_uid_p; /* Set to true if we're running as a user id
123 which is known to not be a normal, non-
126 Window passwd_dialog; /* The password dialog, if its up. */
127 passwd_dialog_data *pw_data; /* Other info necessary to draw it. */
129 int unlock_failures; /* Counts failed login attempts while the
132 char *unlock_typeahead; /* If the screen is locked, and the user types
133 a character, we assume that it is the first
134 character of the password. It's stored here
135 for the password dialog to use to populate
139 /* =======================================================================
141 ======================================================================= */
143 Bool demoing_p; /* Whether we are demoing a single hack
146 Window splash_dialog; /* The splash dialog, if its up. */
147 splash_dialog_data *sp_data; /* Other info necessary to draw it. */
150 /* =======================================================================
152 ======================================================================= */
154 XtIntervalId lock_id; /* Timer to implement `prefs.lock_timeout' */
155 XtIntervalId cycle_id; /* Timer to implement `prefs.cycle' */
156 XtIntervalId timer_id; /* Timer to implement `prefs.timeout' */
157 XtIntervalId watchdog_id; /* Timer to implement `prefs.watchdog */
158 XtIntervalId check_pointer_timer_id; /* `prefs.pointer_timeout' */
160 XtIntervalId de_race_id; /* Timer to make sure screen un-blanks */
163 time_t last_activity_time; /* Used only when no server exts. */
164 time_t last_wall_clock_time; /* Used to detect laptop suspend. */
165 saver_screen_info *last_activity_screen;
167 Bool emergency_lock_p; /* Set when the wall clock has jumped
168 (presumably due to laptop suspend) and we
169 need to lock down right away instead of
170 waiting for the lock timer to go off. */
173 /* =======================================================================
175 ======================================================================= */
177 int selection_mode; /* Set to -1 if the NEXT ClientMessage has just
178 been received; set to -2 if PREV has just
179 been received; set to N if SELECT or DEMO N
180 has been received. (This is kind of nasty.)
183 /* =======================================================================
185 ======================================================================= */
187 XtIntervalId stderr_popup_timer;
192 /* This structure holds all the data that applies to the screen-specific parts
193 of the display connection; if the display has multiple screens, there will
194 be one of these for each screen.
196 struct saver_screen_info {
199 int number; /* The internal ordinal of this screen,
200 counting Xinerama rectangles as separate
202 int real_screen_number; /* The number of the underlying X screen on
203 which this rectangle lies. */
204 Screen *screen; /* The X screen in question. */
206 int x, y, width, height; /* The size and position of this rectangle
207 on its underlying X screen. */
209 Bool real_screen_p; /* This will be true of exactly one ssi per
212 Widget toplevel_shell;
214 /* =======================================================================
216 ======================================================================= */
218 Window screensaver_window; /* The window that will impersonate the root,
219 when the screensaver activates. Note that
220 the window stored here may change, as we
221 destroy and recreate it on different
223 Colormap cmap; /* The colormap that goes with the window. */
224 Bool install_cmap_p; /* Whether this screen should have its own
225 colormap installed, for whichever of several
226 reasons. This is definitive (even a false
227 value here overrides prefs->install_cmap_p.)
229 Visual *current_visual; /* The visual of the window. */
230 int current_depth; /* How deep the visual (and the window) are. */
232 Visual *default_visual; /* visual to use when none other specified */
233 Visual *best_gl_visual; /* visual to use for GL hacks */
235 Window real_vroot; /* The original virtual-root window. */
236 Window real_vroot_value; /* What was in the __SWM_VROOT property. */
238 Cursor cursor; /* A blank cursor that goes with the
240 unsigned long black_pixel; /* Black, allocated from `cmap'. */
242 int blank_vp_x, blank_vp_y; /* Where the virtual-scrolling viewport was
243 when the screen went blank. We need to
244 prevent the X server from letting the mouse
245 bump the edges to scroll while the screen
246 is locked, so we reset to this when it has
247 moved, and the lock dialog is up... */
249 # ifdef HAVE_MIT_SAVER_EXTENSION
250 Window server_mit_saver_window;
254 /* =======================================================================
256 ======================================================================= */
258 Colormap demo_cmap; /* The colormap that goes with the dialogs:
259 this might be the same as `cmap' so care
260 must be taken not to free it while it's
263 /* =======================================================================
265 ======================================================================= */
267 int poll_mouse_last_root_x; /* Used only when no server exts. */
268 int poll_mouse_last_root_y;
269 Window poll_mouse_last_child;
270 unsigned int poll_mouse_last_mask;
273 /* =======================================================================
275 ======================================================================= */
277 int current_hack; /* Index into `prefs.screenhacks' */
282 int stderr_line_height;
283 XFontStruct *stderr_font;
285 Window stderr_overlay_window; /* Used if the server has overlay planes */
286 Colormap stderr_cmap;
292 /* =======================================================================
293 server extensions and virtual roots
294 ======================================================================= */
296 extern Bool restore_real_vroot (saver_info *si);
297 extern void disable_builtin_screensaver (saver_info *, Bool unblank_screen_p);
298 extern Bool ensure_no_screensaver_running (Display *, Screen *);
300 #ifdef HAVE_MIT_SAVER_EXTENSION
301 extern Bool query_mit_saver_extension (saver_info *);
303 #ifdef HAVE_SGI_SAVER_EXTENSION
304 extern Bool query_sgi_saver_extension (saver_info *);
306 #ifdef HAVE_XIDLE_EXTENSION
307 extern Bool query_xidle_extension (saver_info *);
310 extern Bool query_randr_extension (saver_info *);
312 #ifdef HAVE_PROC_INTERRUPTS
313 extern Bool query_proc_interrupts_available (saver_info *, const char **why);
316 /* Display Power Management System (DPMS) interface. */
317 extern Bool monitor_powered_on_p (saver_info *si);
318 extern void monitor_power_on (saver_info *si);
321 /* =======================================================================
323 ======================================================================= */
325 extern void initialize_screensaver_window (saver_info *si);
326 extern void raise_window (saver_info *si,
327 Bool inhibit_fade, Bool between_hacks_p,
329 extern Bool blank_screen (saver_info *si);
330 extern void unblank_screen (saver_info *si);
331 extern void resize_screensaver_window (saver_info *si);
333 extern void get_screen_viewport (saver_screen_info *ssi,
334 int *x_ret, int *y_ret,
335 int *w_ret, int *h_ret,
336 int target_x, int target_y,
340 /* =======================================================================
342 ======================================================================= */
345 extern Bool unlock_p (saver_info *si);
346 extern Bool lock_priv_init (int argc, char **argv, Bool verbose_p);
347 extern Bool lock_init (int argc, char **argv, Bool verbose_p);
348 extern Bool passwd_valid_p (const char *typed_passwd, Bool verbose_p);
349 #endif /* NO_LOCKING */
351 extern void set_locked_p (saver_info *si, Bool locked_p);
352 extern int move_mouse_grab (saver_info *si, Window to, Cursor cursor,
354 extern int mouse_screen (saver_info *si);
357 /* =======================================================================
359 ======================================================================= */
361 extern void hack_uid (saver_info *si);
362 extern void describe_uids (saver_info *si, FILE *out);
364 /* =======================================================================
366 ======================================================================= */
368 extern void draw_shaded_rectangle (Display *dpy, Window window,
370 int width, int height,
372 unsigned long top_color,
373 unsigned long bottom_color);
374 extern int string_width (XFontStruct *font, char *s);
376 extern void make_splash_dialog (saver_info *si);
377 extern void handle_splash_event (saver_info *si, XEvent *e);
380 /* =======================================================================
382 ======================================================================= */
384 extern void start_notice_events_timer (saver_info *, Window, Bool verbose_p);
385 extern void cycle_timer (XtPointer si, XtIntervalId *id);
386 extern void activate_lock_timer (XtPointer si, XtIntervalId *id);
387 extern void reset_watchdog_timer (saver_info *si, Bool on_p);
388 extern void idle_timer (XtPointer si, XtIntervalId *id);
389 extern void de_race_timer (XtPointer si, XtIntervalId *id);
390 extern void sleep_until_idle (saver_info *si, Bool until_idle_p);
391 extern void reset_timers (saver_info *si);
392 extern void schedule_wakeup_event (saver_info *si, Time when, Bool verbose_p);
395 /* =======================================================================
397 ======================================================================= */
399 extern Bool handle_clientmessage (saver_info *, XEvent *, Bool);
400 extern void maybe_reload_init_file (saver_info *);
402 /* =======================================================================
404 ======================================================================= */
406 extern void handle_signals (saver_info *si);
407 #ifdef HAVE_SIGACTION
408 extern sigset_t block_sigchld (void);
409 #else /* !HAVE_SIGACTION */
410 extern int block_sigchld (void);
411 #endif /* !HAVE_SIGACTION */
412 extern void unblock_sigchld (void);
413 extern void hack_environment (saver_info *si);
414 extern void hack_subproc_environment (saver_screen_info *ssi);
415 extern void init_sigchld (void);
416 extern void spawn_screenhack (saver_info *si, Bool first_time_p);
417 extern void kill_screenhack (saver_info *si);
418 extern void suspend_screenhack (saver_info *si, Bool suspend_p);
419 extern Bool screenhack_running_p (saver_info *si);
420 extern void emergency_kill_subproc (saver_info *si);
421 extern Bool select_visual (saver_screen_info *ssi, const char *visual_name);
422 extern void store_saver_status (saver_info *si);
423 extern const char *signal_name (int signal);
424 extern void exec_command (const char *shell, const char *command,
427 /* =======================================================================
429 ======================================================================= */
431 extern FILE *real_stderr;
432 extern FILE *real_stdout;
433 extern void initialize_stderr (saver_info *si);
434 extern void reset_stderr (saver_screen_info *ssi);
435 extern void clear_stderr (saver_screen_info *ssi);
436 extern void shutdown_stderr (saver_info *si);
439 /* =======================================================================
441 ======================================================================= */
443 extern const char *blurb (void);
444 extern void save_argv (int argc, char **argv);
445 extern void saver_exit (saver_info *si, int status, const char *core_reason);
446 extern void restart_process (saver_info *si);
448 extern int saver_ehandler (Display *dpy, XErrorEvent *error);
449 extern int BadWindow_ehandler (Display *dpy, XErrorEvent *error);
450 extern Bool window_exists_p (Display *dpy, Window window);
451 extern char *timestring (void);
452 extern Bool display_is_on_console_p (saver_info *si);
453 extern Visual *get_best_gl_visual (saver_screen_info *ssi);
454 extern void check_for_leaks (const char *where);
456 extern Atom XA_VROOT, XA_XSETROOT_ID, XA_ESETROOT_PMAP_ID, XA_XROOTPMAP_ID;
457 extern Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_ID;
458 extern Atom XA_SCREENSAVER_STATUS, XA_LOCK, XA_BLANK;
459 extern Atom XA_DEMO, XA_PREFS;
461 #endif /* __XSCREENSAVER_H__ */