1 /* xscreensaver, Copyright (c) 1993-1998 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__
25 extern char *progname;
26 extern char *progclass;
28 typedef struct saver_info saver_info;
29 typedef struct saver_screen_info saver_screen_info;
30 typedef struct passwd_dialog_data passwd_dialog_data;
31 typedef struct splash_dialog_data splash_dialog_data;
34 #define countof(x) (sizeof((x))/sizeof((*x)))
38 /* This structure holds all the data that applies to the program as a whole,
39 or to the non-screen-specific parts of the display connection.
41 The saver_preferences structure (prefs.h) holds all the user-specified
42 parameters, read from the command line, the resource database, or entered
47 saver_preferences prefs;
50 saver_screen_info *screens;
51 saver_screen_info *default_screen; /* ...on which dialogs will appear. */
54 /* =======================================================================
55 global connection info
56 ======================================================================= */
61 /* =======================================================================
63 ======================================================================= */
65 Bool using_xidle_extension; /* which extension is being used. */
66 Bool using_mit_saver_extension; /* Note that `p->use_*' is the *request*, */
67 Bool using_sgi_saver_extension; /* and `si->using_*' is the *reality*. */
68 Bool using_proc_interrupts;
70 # ifdef HAVE_MIT_SAVER_EXTENSION
71 int mit_saver_ext_event_number;
72 int mit_saver_ext_error_number;
74 # ifdef HAVE_SGI_SAVER_EXTENSION
75 int sgi_saver_ext_event_number;
76 int sgi_saver_ext_error_number;
80 /* =======================================================================
82 ======================================================================= */
84 Bool screen_blanked_p; /* Whether the saver is currently active. */
85 Window mouse_grab_window; /* Window holding our mouse grab */
86 Window keyboard_grab_window; /* Window holding our keyboard grab */
89 /* =======================================================================
90 locking and runtime privileges
91 ======================================================================= */
93 Bool locked_p; /* Whether the screen is currently locked. */
94 Bool dbox_up_p; /* Whether the demo-mode or passwd dialogs
95 are currently visible */
97 Bool locking_disabled_p; /* Sometimes locking is impossible. */
98 char *nolock_reason; /* This is why. */
100 char *orig_uid; /* What uid/gid we had at startup, before
101 discarding privileges. */
102 char *uid_message; /* Any diagnostics from our attempt to
103 discard privileges (printed only in
105 Bool dangerous_uid_p; /* Set to true if we're running as a user id
106 which is known to not be a normal, non-
109 Window passwd_dialog; /* The password dialog, if its up. */
110 passwd_dialog_data *pw_data; /* Other info necessary to draw it. */
112 int unlock_failures; /* Counts failed login attempts while the
116 /* =======================================================================
118 ======================================================================= */
120 Bool demoing_p; /* Whether we are demoing a single hack
123 Window splash_dialog; /* The splash dialog, if its up. */
124 splash_dialog_data *sp_data; /* Other info necessary to draw it. */
127 /* =======================================================================
129 ======================================================================= */
131 XtIntervalId lock_id; /* Timer to implement `prefs.lock_timeout' */
132 XtIntervalId cycle_id; /* Timer to implement `prefs.cycle' */
133 XtIntervalId timer_id; /* Timer to implement `prefs.timeout' */
134 XtIntervalId watchdog_id; /* Timer to implement `prefs.watchdog */
135 XtIntervalId check_pointer_timer_id; /* `prefs.pointer_timeout' */
137 time_t last_activity_time; /* Used only when no server exts. */
138 saver_screen_info *last_activity_screen;
141 /* =======================================================================
143 ======================================================================= */
145 int selection_mode; /* Set to -1 if the NEXT ClientMessage has just
146 been received; set to -2 if PREV has just
147 been received; set to N if SELECT or DEMO N
148 has been received. (This is kind of nasty.)
151 /* =======================================================================
153 ======================================================================= */
155 XtIntervalId stderr_popup_timer;
160 /* This structure holds all the data that applies to the screen-specific parts
161 of the display connection; if the display has multiple screens, there will
162 be one of these for each screen.
164 struct saver_screen_info {
168 Widget toplevel_shell;
170 /* =======================================================================
172 ======================================================================= */
174 Window screensaver_window; /* The window that will impersonate the root,
175 when the screensaver activates. Note that
176 the window stored here may change, as we
177 destroy and recreate it on different
179 Colormap cmap; /* The colormap that goes with the window. */
180 Bool install_cmap_p; /* Whether this screen should have its own
181 colormap installed, for whichever of several
182 reasons. This is definitive (even a false
183 value here overrides prefs->install_cmap_p.)
185 Visual *current_visual; /* The visual of the window. */
186 Visual *default_visual; /* visual to use when none other specified */
187 int current_depth; /* How deep the visual (and the window) are. */
189 Window real_vroot; /* The original virtual-root window. */
190 Window real_vroot_value; /* What was in the __SWM_VROOT property. */
192 Cursor cursor; /* A blank cursor that goes with the
194 unsigned long black_pixel; /* Black, allocated from `cmap'. */
196 # ifdef HAVE_MIT_SAVER_EXTENSION
197 Window server_mit_saver_window;
201 /* =======================================================================
203 ======================================================================= */
205 Colormap demo_cmap; /* The colormap that goes with the dialogs:
206 this might be the same as `cmap' so care
207 must be taken not to free it while it's
210 /* =======================================================================
212 ======================================================================= */
214 int poll_mouse_last_root_x; /* Used only when no server exts. */
215 int poll_mouse_last_root_y;
216 Window poll_mouse_last_child;
217 unsigned int poll_mouse_last_mask;
220 /* =======================================================================
222 ======================================================================= */
224 int current_hack; /* Index into `prefs.screenhacks' */
229 int stderr_line_height;
230 XFontStruct *stderr_font;
232 Window stderr_overlay_window; /* Used if the server has overlay planes */
233 Colormap stderr_cmap;
239 /* =======================================================================
240 server extensions and virtual roots
241 ======================================================================= */
243 extern void restore_real_vroot (saver_info *si);
244 extern void disable_builtin_screensaver (saver_info *, Bool unblank_screen_p);
245 extern Bool ensure_no_screensaver_running (Display *, Screen *);
247 #ifdef HAVE_MIT_SAVER_EXTENSION
248 extern Bool query_mit_saver_extension (saver_info *);
250 #ifdef HAVE_SGI_SAVER_EXTENSION
251 extern Bool query_sgi_saver_extension (saver_info *);
253 #ifdef HAVE_XIDLE_EXTENSION
254 extern Bool query_xidle_extension (saver_info *);
256 #ifdef HAVE_PROC_INTERRUPTS
257 extern Bool query_proc_interrupts_available (saver_info *, const char **why);
260 /* Display Power Management System (DPMS) interface. */
261 extern Bool monitor_powered_on_p (saver_info *si);
262 extern void monitor_power_on (saver_info *si);
265 /* =======================================================================
267 ======================================================================= */
269 extern void initialize_screensaver_window (saver_info *si);
270 extern void raise_window (saver_info *si,
271 Bool inhibit_fade, Bool between_hacks_p,
273 extern Bool blank_screen (saver_info *si);
274 extern void unblank_screen (saver_info *si);
276 /* =======================================================================
278 ======================================================================= */
281 extern Bool unlock_p (saver_info *si);
282 extern Bool lock_priv_init (int argc, char **argv, Bool verbose_p);
283 extern Bool lock_init (int argc, char **argv, Bool verbose_p);
284 extern Bool passwd_valid_p (const char *typed_passwd, Bool verbose_p);
286 extern void make_passwd_window (saver_info *si);
287 extern void draw_passwd_window (saver_info *si);
288 extern void update_passwd_window (saver_info *si, const char *printed_passwd,
290 extern void destroy_passwd_window (saver_info *si);
292 #endif /* NO_LOCKING */
294 /* =======================================================================
296 ======================================================================= */
298 extern void hack_uid (saver_info *si);
299 extern void describe_uids (saver_info *si, FILE *out);
301 /* =======================================================================
303 ======================================================================= */
305 extern void draw_shaded_rectangle (Display *dpy, Window window,
307 int width, int height,
309 unsigned long top_color,
310 unsigned long bottom_color);
311 extern int string_width (XFontStruct *font, char *s);
313 extern void make_splash_dialog (saver_info *si);
314 extern void handle_splash_event (saver_info *si, XEvent *e);
315 extern void skull (Display *, Window, GC, GC, int, int, int, int);
318 /* =======================================================================
320 ======================================================================= */
322 extern void start_notice_events_timer (saver_info *, Window, Bool verbose_p);
323 extern void cycle_timer (XtPointer si, XtIntervalId *id);
324 extern void activate_lock_timer (XtPointer si, XtIntervalId *id);
325 extern void reset_watchdog_timer (saver_info *si, Bool on_p);
326 extern void idle_timer (XtPointer si, XtIntervalId *id);
327 extern void sleep_until_idle (saver_info *si, Bool until_idle_p);
329 /* =======================================================================
331 ======================================================================= */
333 extern Bool handle_clientmessage (saver_info *, XEvent *, Bool);
334 extern void maybe_reload_init_file (saver_info *);
336 /* =======================================================================
338 ======================================================================= */
340 extern void hack_environment (saver_info *si);
341 extern void hack_subproc_environment (saver_screen_info *ssi);
342 extern void init_sigchld (void);
343 extern void spawn_screenhack (saver_info *si, Bool first_time_p);
344 extern void kill_screenhack (saver_info *si);
345 extern void suspend_screenhack (saver_info *si, Bool suspend_p);
346 extern Bool screenhack_running_p (saver_info *si);
347 extern void emergency_kill_subproc (saver_info *si);
348 extern Bool select_visual (saver_screen_info *ssi, const char *visual_name);
349 extern const char *signal_name (int signal);
351 /* =======================================================================
353 ======================================================================= */
355 extern FILE *real_stderr;
356 extern FILE *real_stdout;
357 extern void initialize_stderr (saver_info *si);
358 extern void reset_stderr (saver_screen_info *ssi);
359 extern void clear_stderr (saver_screen_info *ssi);
362 /* =======================================================================
364 ======================================================================= */
366 extern const char *blurb (void);
367 extern void save_argv (int argc, char **argv);
368 extern void saver_exit (saver_info *si, int status, const char *core_reason);
369 extern void restart_process (saver_info *si);
371 extern int saver_ehandler (Display *dpy, XErrorEvent *error);
372 extern int BadWindow_ehandler (Display *dpy, XErrorEvent *error);
373 extern Bool window_exists_p (Display *dpy, Window window);
374 extern char *timestring (void);
375 extern Bool display_is_on_console_p (saver_info *si);
377 extern Atom XA_VROOT, XA_XSETROOT_ID;
378 extern Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_ID;
379 extern Atom XA_SCREENSAVER_TIME;
380 extern Atom XA_DEMO, XA_PREFS;
382 #endif /* __XSCREENSAVER_H__ */