Move the main loop out into the libobt
[dana/openbox.git] / openbox / openbox.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    openbox.c for the Openbox window manager
4    Copyright (c) 2006        Mikael Magnusson
5    Copyright (c) 2003-2007   Dana Jansens
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #include "debug.h"
21 #include "openbox.h"
22 #include "session.h"
23 #include "dock.h"
24 #include "modkeys.h"
25 #include "event.h"
26 #include "menu.h"
27 #include "client.h"
28 #include "xerror.h"
29 #include "prop.h"
30 #include "screen.h"
31 #include "actions.h"
32 #include "startupnotify.h"
33 #include "focus.h"
34 #include "focus_cycle.h"
35 #include "focus_cycle_indicator.h"
36 #include "focus_cycle_popup.h"
37 #include "moveresize.h"
38 #include "frame.h"
39 #include "keyboard.h"
40 #include "mouse.h"
41 #include "extensions.h"
42 #include "menuframe.h"
43 #include "grab.h"
44 #include "group.h"
45 #include "config.h"
46 #include "ping.h"
47 #include "mainloop.h"
48 #include "gettext.h"
49 #include "parser/parse.h"
50 #include "render/render.h"
51 #include "render/theme.h"
52 #include "obt/display.h"
53
54 #ifdef HAVE_FCNTL_H
55 #  include <fcntl.h>
56 #endif
57 #ifdef HAVE_SIGNAL_H
58 #  include <signal.h>
59 #endif
60 #ifdef HAVE_STDLIB_H
61 #  include <stdlib.h>
62 #endif
63 #ifdef HAVE_LOCALE_H
64 #  include <locale.h>
65 #endif
66 #ifdef HAVE_SYS_STAT_H
67 #  include <sys/stat.h>
68 #  include <sys/types.h>
69 #endif
70 #ifdef HAVE_SYS_WAIT_H
71 #  include <sys/types.h>
72 #  include <sys/wait.h>
73 #endif
74 #ifdef HAVE_UNISTD_H
75 #  include <unistd.h>
76 #endif
77 #include <errno.h>
78
79 #include <X11/cursorfont.h>
80 #if USE_XCURSOR
81 #include <X11/Xcursor/Xcursor.h>
82 #endif
83
84 #include <X11/Xlib.h>
85 #include <X11/keysym.h>
86
87 RrInstance  *ob_rr_inst;
88 RrTheme     *ob_rr_theme;
89 ObtMainLoop *ob_main_loop;
90 Display     *ob_display;
91 gint         ob_screen;
92 gboolean     ob_replace_wm = FALSE;
93 gboolean     ob_sm_use = TRUE;
94 gchar       *ob_sm_id = NULL;
95 gchar       *ob_sm_save_file = NULL;
96 gboolean     ob_sm_restore = TRUE;
97 gboolean     ob_debug_xinerama = FALSE;
98
99 static ObState   state;
100 static gboolean  xsync = FALSE;
101 static gboolean  reconfigure = FALSE;
102 static gboolean  restart = FALSE;
103 static gchar    *restart_path = NULL;
104 static Cursor    cursors[OB_NUM_CURSORS];
105 static KeyCode   keys[OB_NUM_KEYS];
106 static gint      exitcode = 0;
107 static guint     remote_control = 0;
108 static gboolean  being_replaced = FALSE;
109
110 static void signal_handler(gint signal, gpointer data);
111 static void remove_args(gint *argc, gchar **argv, gint index, gint num);
112 static void parse_env();
113 static void parse_args(gint *argc, gchar **argv);
114 static Cursor load_cursor(const gchar *name, guint fontval);
115
116 gint main(gint argc, gchar **argv)
117 {
118     gchar *program_name;
119
120     state = OB_STATE_STARTING;
121
122     /* initialize the locale */
123     if (!setlocale(LC_ALL, ""))
124         g_message("Couldn't set locale from environment.");
125     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
126     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
127     textdomain(PACKAGE_NAME);
128
129     if (chdir(g_get_home_dir()) == -1)
130         g_message(_("Unable to change to home directory '%s': %s"),
131                   g_get_home_dir(), g_strerror(errno));
132
133     /* parse the command line args, which can change the argv[0] */
134     parse_args(&argc, argv);
135     /* parse the environment variables */
136     parse_env();
137
138     program_name = g_path_get_basename(argv[0]);
139     g_set_prgname(program_name);
140
141     if (!remote_control) {
142         parse_paths_startup();
143
144         session_startup(argc, argv);
145     }
146
147     ob_display = obt_display_open(NULL);
148     if (ob_display == NULL)
149         ob_exit_with_error(_("Failed to open the display from the DISPLAY environment variable."));
150
151     if (remote_control) {
152         prop_startup();
153
154         /* Send client message telling the OB process to:
155          * remote_control = 1 -> reconfigure
156          * remote_control = 2 -> restart */
157         PROP_MSG(RootWindow(ob_display, ob_screen),
158                  ob_control, remote_control, 0, 0, 0);
159         obt_display_close(ob_display);
160         exit(EXIT_SUCCESS);
161     }
162
163     ob_main_loop = obt_main_loop_new(ob_display);
164
165     /* set up signal handler */
166     obt_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL,NULL);
167     obt_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL,NULL);
168     obt_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL,NULL);
169     obt_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler,  NULL,NULL);
170     obt_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler,  NULL,NULL);
171     obt_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL,NULL);
172     obt_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL,NULL);
173
174     ob_screen = DefaultScreen(ob_display);
175
176     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
177     if (ob_rr_inst == NULL)
178         ob_exit_with_error(_("Failed to initialize the obrender library."));
179
180     XSynchronize(ob_display, xsync);
181
182     /* check for locale support */
183     if (!XSupportsLocale())
184         g_message(_("X server does not support locale."));
185     if (!XSetLocaleModifiers(""))
186         g_message(_("Cannot set locale modifiers for the X server."));
187
188     /* set our error handler */
189     XSetErrorHandler(xerror_handler);
190
191     /* set the DISPLAY environment variable for any lauched children, to the
192        display we're using, so they open in the right place. */
193     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
194
195     /* create available cursors */
196     cursors[OB_CURSOR_NONE] = None;
197     cursors[OB_CURSOR_POINTER] = load_cursor("left_ptr", XC_left_ptr);
198     cursors[OB_CURSOR_BUSYPOINTER] = load_cursor("left_ptr_watch",XC_left_ptr);
199     cursors[OB_CURSOR_BUSY] = load_cursor("watch", XC_watch);
200     cursors[OB_CURSOR_MOVE] = load_cursor("fleur", XC_fleur);
201     cursors[OB_CURSOR_NORTH] = load_cursor("top_side", XC_top_side);
202     cursors[OB_CURSOR_NORTHEAST] = load_cursor("top_right_corner",
203                                                XC_top_right_corner);
204     cursors[OB_CURSOR_EAST] = load_cursor("right_side", XC_right_side);
205     cursors[OB_CURSOR_SOUTHEAST] = load_cursor("bottom_right_corner",
206                                                XC_bottom_right_corner);
207     cursors[OB_CURSOR_SOUTH] = load_cursor("bottom_side", XC_bottom_side);
208     cursors[OB_CURSOR_SOUTHWEST] = load_cursor("bottom_left_corner",
209                                                XC_bottom_left_corner);
210     cursors[OB_CURSOR_WEST] = load_cursor("left_side", XC_left_side);
211     cursors[OB_CURSOR_NORTHWEST] = load_cursor("top_left_corner",
212                                                XC_top_left_corner);
213
214
215     prop_startup(); /* get atoms values for the display */
216     extensions_query_all(); /* find which extensions are present */
217
218     if (screen_annex()) { /* it will be ours! */
219         do {
220             modkeys_startup(reconfigure);
221
222             /* get the keycodes for keys we use */
223             keys[OB_KEY_RETURN] = modkeys_sym_to_code(XK_Return);
224             keys[OB_KEY_ESCAPE] = modkeys_sym_to_code(XK_Escape);
225             keys[OB_KEY_LEFT] = modkeys_sym_to_code(XK_Left);
226             keys[OB_KEY_RIGHT] = modkeys_sym_to_code(XK_Right);
227             keys[OB_KEY_UP] = modkeys_sym_to_code(XK_Up);
228             keys[OB_KEY_DOWN] = modkeys_sym_to_code(XK_Down);
229
230             {
231                 ObParseInst *i;
232                 xmlDocPtr doc;
233                 xmlNodePtr node;
234
235                 /* startup the parsing so everything can register sections
236                    of the rc */
237                 i = parse_startup();
238
239                 /* register all the available actions */
240                 actions_startup(reconfigure);
241                 /* start up config which sets up with the parser */
242                 config_startup(i);
243
244                 /* parse/load user options */
245                 if (parse_load_rc(NULL, &doc, &node)) {
246                     parse_tree(i, doc, node->xmlChildrenNode);
247                     parse_close(doc);
248                 } else
249                     g_message(_("Unable to find a valid config file, using some simple defaults"));
250
251 /*
252                 if (config_type != NULL)
253                     PROP_SETS(RootWindow(ob_display, ob_screen),
254                               ob_config, config_type);
255 */
256
257                 /* we're done with parsing now, kill it */
258                 parse_shutdown(i);
259             }
260
261             /* load the theme specified in the rc file */
262             {
263                 RrTheme *theme;
264                 if ((theme = RrThemeNew(ob_rr_inst, config_theme, TRUE,
265                                         config_font_activewindow,
266                                         config_font_inactivewindow,
267                                         config_font_menutitle,
268                                         config_font_menuitem,
269                                         config_font_osd)))
270                 {
271                     RrThemeFree(ob_rr_theme);
272                     ob_rr_theme = theme;
273                 }
274                 if (ob_rr_theme == NULL)
275                     ob_exit_with_error(_("Unable to load a theme."));
276
277                 PROP_SETS(RootWindow(ob_display, ob_screen),
278                           ob_theme, ob_rr_theme->name);
279             }
280
281             if (reconfigure) {
282                 GList *it;
283
284                 /* update all existing windows for the new theme */
285                 for (it = client_list; it; it = g_list_next(it)) {
286                     ObClient *c = it->data;
287                     frame_adjust_theme(c->frame);
288                 }
289             }
290             event_startup(reconfigure);
291             /* focus_backup is used for stacking, so this needs to come before
292                anything that calls stacking_add */
293             sn_startup(reconfigure);
294             window_startup(reconfigure);
295             focus_startup(reconfigure);
296             focus_cycle_startup(reconfigure);
297             focus_cycle_indicator_startup(reconfigure);
298             focus_cycle_popup_startup(reconfigure);
299             screen_startup(reconfigure);
300             grab_startup(reconfigure);
301             group_startup(reconfigure);
302             ping_startup(reconfigure);
303             client_startup(reconfigure);
304             dock_startup(reconfigure);
305             moveresize_startup(reconfigure);
306             keyboard_startup(reconfigure);
307             mouse_startup(reconfigure);
308             menu_frame_startup(reconfigure);
309             menu_startup(reconfigure);
310
311             if (!reconfigure) {
312                 guint32 xid;
313                 ObWindow *w;
314
315                 /* get all the existing windows */
316                 client_manage_all();
317                 focus_nothing();
318
319                 /* focus what was focused if a wm was already running */
320                 if (PROP_GET32(RootWindow(ob_display, ob_screen),
321                                net_active_window, window, &xid) &&
322                     (w = g_hash_table_lookup(window_map, &xid)) &&
323                     WINDOW_IS_CLIENT(w))
324                 {
325                     client_focus(WINDOW_AS_CLIENT(w));
326                 }
327             } else {
328                 GList *it;
329
330                 /* redecorate all existing windows */
331                 for (it = client_list; it; it = g_list_next(it)) {
332                     ObClient *c = it->data;
333
334                     /* the new config can change the window's decorations */
335                     client_setup_decor_and_functions(c, FALSE);
336                     /* redraw the frames */
337                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
338                     /* the decor sizes may have changed, so the windows may
339                        end up in new positions */
340                     client_reconfigure(c, FALSE);
341                 }
342             }
343
344             reconfigure = FALSE;
345
346             state = OB_STATE_RUNNING;
347             obt_main_loop_run(ob_main_loop);
348             state = OB_STATE_EXITING;
349
350             if (!reconfigure) {
351                 dock_remove_all();
352                 client_unmanage_all();
353             }
354
355             menu_shutdown(reconfigure);
356             menu_frame_shutdown(reconfigure);
357             mouse_shutdown(reconfigure);
358             keyboard_shutdown(reconfigure);
359             moveresize_shutdown(reconfigure);
360             dock_shutdown(reconfigure);
361             client_shutdown(reconfigure);
362             ping_shutdown(reconfigure);
363             group_shutdown(reconfigure);
364             grab_shutdown(reconfigure);
365             screen_shutdown(reconfigure);
366             focus_cycle_popup_shutdown(reconfigure);
367             focus_cycle_indicator_shutdown(reconfigure);
368             focus_cycle_shutdown(reconfigure);
369             focus_shutdown(reconfigure);
370             window_shutdown(reconfigure);
371             sn_shutdown(reconfigure);
372             event_shutdown(reconfigure);
373             config_shutdown();
374             actions_shutdown(reconfigure);
375             modkeys_shutdown(reconfigure);
376         } while (reconfigure);
377     }
378
379     XSync(ob_display, FALSE);
380
381     RrThemeFree(ob_rr_theme);
382     RrInstanceFree(ob_rr_inst);
383
384     session_shutdown(being_replaced);
385
386     obt_display_close(ob_display);
387
388     parse_paths_shutdown();
389
390     if (restart) {
391         if (restart_path != NULL) {
392             gint argcp;
393             gchar **argvp;
394             GError *err = NULL;
395
396             /* run other window manager */
397             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
398                 execvp(argvp[0], argvp);
399                 g_strfreev(argvp);
400             } else {
401                 g_message(
402                     _("Restart failed to execute new executable '%s': %s"),
403                     restart_path, err->message);
404                 g_error_free(err);
405             }
406         }
407
408         /* we remove the session arguments from argv, so put them back,
409            also don't restore the session on restart */
410         if (ob_sm_save_file != NULL || ob_sm_id != NULL) {
411             gchar **nargv;
412             gint i, l;
413
414             l = argc + 1 +
415                 (ob_sm_save_file != NULL ? 2 : 0) +
416                 (ob_sm_id != NULL ? 2 : 0);
417             nargv = g_new0(gchar*, l+1);
418             for (i = 0; i < argc; ++i)
419                 nargv[i] = argv[i];
420
421             if (ob_sm_save_file != NULL) {
422                 nargv[i++] = g_strdup("--sm-save-file");
423                 nargv[i++] = ob_sm_save_file;
424             }
425             if (ob_sm_id != NULL) {
426                 nargv[i++] = g_strdup("--sm-client-id");
427                 nargv[i++] = ob_sm_id;
428             }
429             nargv[i++] = g_strdup("--sm-no-load");
430             g_assert(i == l);
431             argv = nargv;
432         }
433
434         /* re-run me */
435         execvp(argv[0], argv); /* try how we were run */
436         execlp(argv[0], program_name, (gchar*)NULL); /* last resort */
437     }
438
439     /* free stuff passed in from the command line or environment */
440     g_free(ob_sm_save_file);
441     g_free(ob_sm_id);
442     g_free(program_name);
443
444     return exitcode;
445 }
446
447 static void signal_handler(gint signal, gpointer data)
448 {
449     switch (signal) {
450     case SIGUSR1:
451         ob_debug("Caught signal %d. Restarting.\n", signal);
452         ob_restart();
453         break;
454     case SIGUSR2:
455         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
456         ob_reconfigure();
457         break;
458     case SIGCHLD:
459         /* reap children */
460         while (waitpid(-1, NULL, WNOHANG) > 0);
461         break;
462     default:
463         ob_debug("Caught signal %d. Exiting.\n", signal);
464         /* TERM and INT return a 0 code */
465         ob_exit(!(signal == SIGTERM || signal == SIGINT));
466     }
467 }
468
469 static void print_version()
470 {
471     g_print("Openbox %s\n", PACKAGE_VERSION);
472     g_print(_("Copyright (c)"));
473     g_print(" 2008        Mikael Magnusson\n");
474     g_print(_("Copyright (c)"));
475     g_print(" 2003-2006   Dana Jansens\n\n");
476     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
477     g_print("This is free software, and you are welcome to redistribute it\n");
478     g_print("under certain conditions. See the file COPYING for details.\n\n");
479 }
480
481 static void print_help()
482 {
483     g_print(_("Syntax: openbox [options]\n"));
484     g_print(_("\nOptions:\n"));
485     g_print(_("  --help              Display this help and exit\n"));
486     g_print(_("  --version           Display the version and exit\n"));
487     g_print(_("  --replace           Replace the currently running window manager\n"));
488     g_print(_("  --sm-disable        Disable connection to the session manager\n"));
489     g_print(_("\nPassing messages to a running Openbox instance:\n"));
490     g_print(_("  --reconfigure       Reload Openbox's configuration\n"));
491     g_print(_("  --restart           Restart Openbox\n"));
492     g_print(_("  --exit              Exit Openbox\n"));
493     g_print(_("\nDebugging options:\n"));
494     g_print(_("  --sync              Run in synchronous mode\n"));
495     g_print(_("  --debug             Display debugging output\n"));
496     g_print(_("  --debug-focus       Display debugging output for focus handling\n"));
497     g_print(_("  --debug-xinerama    Split the display into fake xinerama screens\n"));
498     g_print(_("\nPlease report bugs at %s\n"), PACKAGE_BUGREPORT);
499 }
500
501 static void remove_args(gint *argc, gchar **argv, gint index, gint num)
502 {
503     gint i;
504
505     for (i = index; i < *argc - num; ++i)
506         argv[i] = argv[i+num];
507     for (; i < *argc; ++i)
508         argv[i] = NULL;
509     *argc -= num;
510 }
511
512 static void parse_env()
513 {
514     /* unset this so we don't pass it on unknowingly */
515     gchar *s = g_strdup("DESKTOP_STARTUP_ID");
516     putenv(s);
517     g_free(s);
518 }
519
520 static void parse_args(gint *argc, gchar **argv)
521 {
522     gint i;
523
524     for (i = 1; i < *argc; ++i) {
525         if (!strcmp(argv[i], "--version")) {
526             print_version();
527             exit(0);
528         }
529         else if (!strcmp(argv[i], "--help")) {
530             print_help();
531             exit(0);
532         }
533         else if (!strcmp(argv[i], "--g-fatal-warnings")) {
534             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
535         }
536         else if (!strcmp(argv[i], "--replace")) {
537             ob_replace_wm = TRUE;
538             remove_args(argc, argv, i, 1);
539             --i; /* this arg was removed so go back */
540         }
541         else if (!strcmp(argv[i], "--sync")) {
542             xsync = TRUE;
543         }
544         else if (!strcmp(argv[i], "--debug")) {
545             ob_debug_show_output(TRUE);
546             ob_debug_enable(OB_DEBUG_SM, TRUE);
547             ob_debug_enable(OB_DEBUG_APP_BUGS, TRUE);
548         }
549         else if (!strcmp(argv[i], "--debug-focus")) {
550             ob_debug_show_output(TRUE);
551             ob_debug_enable(OB_DEBUG_SM, TRUE);
552             ob_debug_enable(OB_DEBUG_APP_BUGS, TRUE);
553             ob_debug_enable(OB_DEBUG_FOCUS, TRUE);
554         }
555         else if (!strcmp(argv[i], "--debug-xinerama")) {
556             ob_debug_xinerama = TRUE;
557         }
558         else if (!strcmp(argv[i], "--reconfigure")) {
559             remote_control = 1;
560         }
561         else if (!strcmp(argv[i], "--restart")) {
562             remote_control = 2;
563         }
564         else if (!strcmp(argv[i], "--exit")) {
565             remote_control = 3;
566         }
567         else if (!strcmp(argv[i], "--sm-save-file")) {
568             if (i == *argc - 1) /* no args left */
569                 /* not translated cuz it's sekret */
570                 g_printerr("--sm-save-file requires an argument\n");
571             else {
572                 ob_sm_save_file = g_strdup(argv[i+1]);
573                 remove_args(argc, argv, i, 2);
574                 --i; /* this arg was removed so go back */
575                 ob_debug_type(OB_DEBUG_SM, "--sm-save-file %s\n",
576                               ob_sm_save_file);
577             }
578         }
579         else if (!strcmp(argv[i], "--sm-client-id")) {
580             if (i == *argc - 1) /* no args left */
581                 /* not translated cuz it's sekret */
582                 g_printerr("--sm-client-id requires an argument\n");
583             else {
584                 ob_sm_id = g_strdup(argv[i+1]);
585                 remove_args(argc, argv, i, 2);
586                 --i; /* this arg was removed so go back */
587                 ob_debug_type(OB_DEBUG_SM, "--sm-client-id %s\n", ob_sm_id);
588             }
589         }
590         else if (!strcmp(argv[i], "--sm-disable")) {
591             ob_sm_use = FALSE;
592         }
593         else if (!strcmp(argv[i], "--sm-no-load")) {
594             ob_sm_restore = FALSE;
595             remove_args(argc, argv, i, 1);
596             --i; /* this arg was removed so go back */
597         }
598         else {
599             /* this is a memleak.. oh well.. heh */
600             gchar *err = g_strdup_printf
601                 (_("Invalid command line argument '%s'\n"), argv[i]);
602             ob_exit_with_error(err);
603         }
604     }
605 }
606
607 static Cursor load_cursor(const gchar *name, guint fontval)
608 {
609     Cursor c = None;
610
611 #if USE_XCURSOR
612     c = XcursorLibraryLoadCursor(ob_display, name);
613 #endif
614     if (c == None)
615         c = XCreateFontCursor(ob_display, fontval);
616     return c;
617 }
618
619 void ob_exit_with_error(const gchar *msg)
620 {
621     g_message(msg);
622     session_shutdown(TRUE);
623     exit(EXIT_FAILURE);
624 }
625
626 void ob_restart_other(const gchar *path)
627 {
628     restart_path = g_strdup(path);
629     ob_restart();
630 }
631
632 void ob_restart()
633 {
634     restart = TRUE;
635     ob_exit(0);
636 }
637
638 void ob_reconfigure()
639 {
640     reconfigure = TRUE;
641     ob_exit(0);
642 }
643
644 void ob_exit(gint code)
645 {
646     exitcode = code;
647     obt_main_loop_exit(ob_main_loop);
648 }
649
650 void ob_exit_replace()
651 {
652     exitcode = 0;
653     being_replaced = TRUE;
654     obt_main_loop_exit(ob_main_loop);
655 }
656
657 Cursor ob_cursor(ObCursor cursor)
658 {
659     g_assert(cursor < OB_NUM_CURSORS);
660     return cursors[cursor];
661 }
662
663 KeyCode ob_keycode(ObKey key)
664 {
665     g_assert(key < OB_NUM_KEYS);
666     return keys[key];
667 }
668
669 ObState ob_state()
670 {
671     return state;
672 }