return the old cursor. oops
[mikachu/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        Ben 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 "event.h"
25 #include "menu.h"
26 #include "client.h"
27 #include "xerror.h"
28 #include "prop.h"
29 #include "screen.h"
30 #include "startupnotify.h"
31 #include "focus.h"
32 #include "moveresize.h"
33 #include "frame.h"
34 #include "keyboard.h"
35 #include "mouse.h"
36 #include "extensions.h"
37 #include "menuframe.h"
38 #include "grab.h"
39 #include "group.h"
40 #include "config.h"
41 #include "mainloop.h"
42 #include "gettext.h"
43 #include "parser/parse.h"
44 #include "render/render.h"
45 #include "render/theme.h"
46
47 #ifdef HAVE_FCNTL_H
48 #  include <fcntl.h>
49 #endif
50 #ifdef HAVE_SIGNAL_H
51 #  include <signal.h>
52 #endif
53 #ifdef HAVE_STDLIB_H
54 #  include <stdlib.h>
55 #endif
56 #ifdef HAVE_LOCALE_H
57 #  include <locale.h>
58 #endif
59 #ifdef HAVE_SYS_STAT_H
60 #  include <sys/stat.h>
61 #  include <sys/types.h>
62 #endif
63 #ifdef HAVE_SYS_WAIT_H
64 #  include <sys/types.h>
65 #  include <sys/wait.h>
66 #endif
67 #ifdef HAVE_UNISTD_H
68 #  include <unistd.h>
69 #endif
70 #include <errno.h>
71
72 #include <X11/cursorfont.h>
73 #if USE_XCURSOR
74 #include <X11/Xcursor/Xcursor.h>
75 #endif
76
77 RrInstance *ob_rr_inst;
78 RrTheme    *ob_rr_theme;
79 ObMainLoop *ob_main_loop;
80 Display    *ob_display;
81 gint        ob_screen;
82 gboolean    ob_replace_wm = FALSE;
83
84 static ObState   state;
85 static gboolean  xsync = FALSE;
86 static gboolean  reconfigure = FALSE;
87 static gboolean  restart = FALSE;
88 static gchar    *restart_path = NULL;
89 static Cursor    cursors[OB_NUM_CURSORS];
90 static KeyCode   keys[OB_NUM_KEYS];
91 static gint      exitcode = 0;
92 static guint     remote_control = 0;
93 static gboolean  being_replaced = FALSE;
94
95 static void signal_handler(gint signal, gpointer data);
96 static void parse_args(gint argc, gchar **argv);
97 static Cursor load_cursor(const gchar *name, guint fontval);
98
99 gint main(gint argc, gchar **argv)
100 {
101 #ifdef DEBUG
102     ob_debug_show_output(TRUE);
103 #endif
104
105     state = OB_STATE_STARTING;
106
107     /* initialize the locale */
108     if (!setlocale(LC_ALL, ""))
109         g_warning("Couldn't set locale from environment.\n");
110     bindtextdomain(PACKAGE_NAME, LOCALEDIR);
111     bind_textdomain_codeset(PACKAGE_NAME, "UTF-8");
112     textdomain(PACKAGE_NAME);
113
114     g_set_prgname(argv[0]);
115
116     if (chdir(g_get_home_dir()) == -1)
117         g_warning("Unable to change to home directory (%s): %s",
118                   g_get_home_dir(), g_strerror(errno));
119      
120     /* parse out command line args */
121     parse_args(argc, argv);
122
123     if (!remote_control) {
124         parse_paths_startup();
125
126         session_startup(argc, argv);
127     }
128
129     ob_display = XOpenDisplay(NULL);
130     if (ob_display == NULL)
131         ob_exit_with_error("Failed to open the display.");
132     if (fcntl(ConnectionNumber(ob_display), F_SETFD, 1) == -1)
133         ob_exit_with_error("Failed to set display as close-on-exec.");
134
135     if (remote_control) {
136         prop_startup();
137
138         /* Send client message telling the OB process to:
139          * remote_control = 1 -> reconfigure 
140          * remote_control = 2 -> restart */
141         PROP_MSG(RootWindow(ob_display, ob_screen),
142                  ob_control, remote_control, 0, 0, 0);
143         XCloseDisplay(ob_display);
144         exit(EXIT_SUCCESS);
145     }
146
147     ob_main_loop = ob_main_loop_new(ob_display);
148
149     /* set up signal handler */
150     ob_main_loop_signal_add(ob_main_loop, SIGUSR1, signal_handler, NULL, NULL);
151     ob_main_loop_signal_add(ob_main_loop, SIGUSR2, signal_handler, NULL, NULL);
152     ob_main_loop_signal_add(ob_main_loop, SIGTERM, signal_handler, NULL, NULL);
153     ob_main_loop_signal_add(ob_main_loop, SIGINT, signal_handler, NULL, NULL);
154     ob_main_loop_signal_add(ob_main_loop, SIGHUP, signal_handler, NULL, NULL);
155     ob_main_loop_signal_add(ob_main_loop, SIGPIPE, signal_handler, NULL, NULL);
156     ob_main_loop_signal_add(ob_main_loop, SIGCHLD, signal_handler, NULL, NULL);
157
158     ob_screen = DefaultScreen(ob_display);
159
160     ob_rr_inst = RrInstanceNew(ob_display, ob_screen);
161     if (ob_rr_inst == NULL)
162         ob_exit_with_error("Failed to initialize the render library.");
163
164     XSynchronize(ob_display, xsync);
165
166     /* check for locale support */
167     if (!XSupportsLocale())
168         g_warning("X server does not support locale.");
169     if (!XSetLocaleModifiers(""))
170         g_warning("Cannot set locale modifiers for the X server.");
171
172     /* set our error handler */
173     XSetErrorHandler(xerror_handler);
174
175     /* set the DISPLAY environment variable for any lauched children, to the
176        display we're using, so they open in the right place. */
177     putenv(g_strdup_printf("DISPLAY=%s", DisplayString(ob_display)));
178
179     /* create available cursors */
180     cursors[OB_CURSOR_NONE] = None;
181     cursors[OB_CURSOR_POINTER] = load_cursor("left_ptr", XC_left_ptr);
182     cursors[OB_CURSOR_BUSY] = load_cursor("left_ptr_watch", XC_watch);
183     cursors[OB_CURSOR_MOVE] = load_cursor("fleur", XC_fleur);
184     cursors[OB_CURSOR_NORTH] = load_cursor("top_side", XC_top_side);
185     cursors[OB_CURSOR_NORTHEAST] = load_cursor("top_right_corner",
186                                                XC_top_right_corner);
187     cursors[OB_CURSOR_EAST] = load_cursor("right_side", XC_right_side);
188     cursors[OB_CURSOR_SOUTHEAST] = load_cursor("bottom_right_corner",
189                                                XC_bottom_right_corner);
190     cursors[OB_CURSOR_SOUTH] = load_cursor("bottom_side", XC_bottom_side);
191     cursors[OB_CURSOR_SOUTHWEST] = load_cursor("bottom_left_corner",
192                                                XC_bottom_left_corner);
193     cursors[OB_CURSOR_WEST] = load_cursor("left_side", XC_left_side);
194     cursors[OB_CURSOR_NORTHWEST] = load_cursor("top_left_corner",
195                                                XC_top_left_corner);
196
197     /* create available keycodes */
198     keys[OB_KEY_RETURN] =
199         XKeysymToKeycode(ob_display, XStringToKeysym("Return"));
200     keys[OB_KEY_ESCAPE] =
201         XKeysymToKeycode(ob_display, XStringToKeysym("Escape"));
202     keys[OB_KEY_LEFT] =
203         XKeysymToKeycode(ob_display, XStringToKeysym("Left"));
204     keys[OB_KEY_RIGHT] =
205         XKeysymToKeycode(ob_display, XStringToKeysym("Right"));
206     keys[OB_KEY_UP] =
207         XKeysymToKeycode(ob_display, XStringToKeysym("Up"));
208     keys[OB_KEY_DOWN] =
209         XKeysymToKeycode(ob_display, XStringToKeysym("Down"));
210
211     prop_startup(); /* get atoms values for the display */
212     extensions_query_all(); /* find which extensions are present */
213
214     if (screen_annex()) { /* it will be ours! */
215         do {
216             {
217                 ObParseInst *i;
218                 xmlDocPtr doc;
219                 xmlNodePtr node;
220
221                 /* startup the parsing so everything can register sections
222                    of the rc */
223                 i = parse_startup();
224
225                 config_startup(i);
226                 /* parse/load user options */
227                 if (parse_load_rc(&doc, &node))
228                     parse_tree(i, doc, node->xmlChildrenNode);
229                 /* we're done with parsing now, kill it */
230                 parse_close(doc);
231                 parse_shutdown(i);
232             }
233
234             /* load the theme specified in the rc file */
235             {
236                 RrTheme *theme;
237                 if ((theme = RrThemeNew(ob_rr_inst, config_theme,
238                                         config_font_activewindow,
239                                         config_font_inactivewindow,
240                                         config_font_menutitle,
241                                         config_font_menuitem)))
242                 {
243                     RrThemeFree(ob_rr_theme);
244                     ob_rr_theme = theme;
245                 }
246                 if (ob_rr_theme == NULL)
247                     ob_exit_with_error("Unable to load a theme.");
248             }
249
250             if (reconfigure) {
251                 GList *it;
252
253                 /* update all existing windows for the new theme */
254                 for (it = client_list; it; it = g_list_next(it)) {
255                     ObClient *c = it->data;
256                     frame_adjust_theme(c->frame);
257                 }
258             }
259             event_startup(reconfigure);
260             /* focus_backup is used for stacking, so this needs to come before
261                anything that calls stacking_add */
262             focus_startup(reconfigure);
263             window_startup(reconfigure);
264             sn_startup(reconfigure);
265             screen_startup(reconfigure);
266             grab_startup(reconfigure);
267             group_startup(reconfigure);
268             client_startup(reconfigure);
269             dock_startup(reconfigure);
270             moveresize_startup(reconfigure);
271             keyboard_startup(reconfigure);
272             mouse_startup(reconfigure);
273             menu_startup(reconfigure);
274
275             if (!reconfigure) {
276                 /* get all the existing windows */
277                 client_manage_all();
278                 focus_fallback(TRUE);
279             } else {
280                 GList *it;
281
282                 /* redecorate all existing windows */
283                 for (it = client_list; it; it = g_list_next(it)) {
284                     ObClient *c = it->data;
285                     /* the new config can change the window's decorations */
286                     client_setup_decor_and_functions(c);
287                     /* redraw the frames */
288                     frame_adjust_area(c->frame, TRUE, TRUE, FALSE);
289                 }
290             }
291
292             reconfigure = FALSE;
293
294             state = OB_STATE_RUNNING;
295             ob_main_loop_run(ob_main_loop);
296             state = OB_STATE_EXITING;
297
298             if (!reconfigure) {
299                 dock_remove_all();
300                 client_unmanage_all();
301             }
302
303             menu_shutdown(reconfigure);
304             mouse_shutdown(reconfigure);
305             keyboard_shutdown(reconfigure);
306             moveresize_shutdown(reconfigure);
307             dock_shutdown(reconfigure);
308             client_shutdown(reconfigure);
309             group_shutdown(reconfigure);
310             grab_shutdown(reconfigure);
311             screen_shutdown(reconfigure);
312             focus_shutdown(reconfigure);
313             sn_shutdown(reconfigure);
314             window_shutdown(reconfigure);
315             event_shutdown(reconfigure);
316             config_shutdown();
317         } while (reconfigure);
318     }
319
320     XSync(ob_display, FALSE);
321
322     RrThemeFree(ob_rr_theme);
323     RrInstanceFree(ob_rr_inst);
324
325     session_shutdown(being_replaced);
326
327     XCloseDisplay(ob_display);
328
329     parse_paths_shutdown();
330
331     if (restart) {
332         if (restart_path != NULL) {
333             gint argcp;
334             gchar **argvp;
335             GError *err = NULL;
336
337             /* run other window manager */
338             if (g_shell_parse_argv(restart_path, &argcp, &argvp, &err)) {
339                 execvp(argvp[0], argvp);
340                 g_strfreev(argvp);
341             } else {
342                 g_warning("failed to execute '%s': %s", restart_path,
343                           err->message);
344                 g_error_free(err);
345             }
346         }
347
348         /* re-run me */
349         execvp(argv[0], argv); /* try how we were run */
350         execlp(argv[0], g_path_get_basename(argv[0]),
351                (char *)NULL); /* last resort */
352     }
353      
354     return exitcode;
355 }
356
357 static void signal_handler(gint signal, gpointer data)
358 {
359     switch (signal) {
360     case SIGUSR1:
361         ob_debug("Caught signal %d. Restarting.\n", signal);
362         ob_restart();
363         break;
364     case SIGUSR2:
365         ob_debug("Caught signal %d. Reconfiguring.\n", signal);
366         ob_reconfigure(); 
367         break;
368     case SIGCHLD:
369         /* reap children */
370         while (waitpid(-1, NULL, WNOHANG) > 0);
371         break;
372     default:
373         ob_debug("Caught signal %d. Exiting.\n", signal);
374         /* TERM and INT return a 0 code */
375         ob_exit(!(signal == SIGTERM || signal == SIGINT));
376     }
377 }
378
379 static void print_version()
380 {
381     g_print("Openbox %s\n", PACKAGE_VERSION);
382     g_print("Copyright (c) 2007 Mikael Magnusson\n");
383     g_print("Copyright (c) 2007 Dana Jansens\n\n");
384     g_print("This program comes with ABSOLUTELY NO WARRANTY.\n");
385     g_print("This is free software, and you are welcome to redistribute it\n");
386     g_print("under certain conditions. See the file COPYING for details.\n\n");
387 }
388
389 static void print_help()
390 {
391     g_print("Syntax: openbox [options]\n\n");
392     g_print("Options:\n\n");
393     g_print("  --reconfigure       Tell the currently running instance of "
394             "Openbox to\n"
395             "                      reconfigure (and then exit immediately)\n");
396 #ifdef USE_SM
397     g_print("  --sm-disable        Disable connection to session manager\n");
398     g_print("  --sm-client-id ID   Specify session management ID\n");
399     g_print("  --sm-save-file FILE Specify file to load a saved session"
400             "from\n");
401 #endif
402     g_print("  --replace           Replace the currently running window "
403             "manager\n");
404     g_print("  --help              Display this help and exit\n");
405     g_print("  --version           Display the version and exit\n");
406     g_print("  --sync              Run in synchronous mode (this is slow and "
407             "meant for\n"
408             "                      debugging X routines)\n");
409     g_print("  --debug             Display debugging output\n");
410     g_print("\nPlease report bugs at %s\n\n", PACKAGE_BUGREPORT);
411 }
412
413 static void parse_args(gint argc, gchar **argv)
414 {
415     gint i;
416
417     for (i = 1; i < argc; ++i) {
418         if (!strcmp(argv[i], "--version")) {
419             print_version();
420             exit(0);
421         } else if (!strcmp(argv[i], "--help")) {
422             print_help();
423             exit(0);
424         } else if (!strcmp(argv[i], "--g-fatal-warnings")) {
425             g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
426         } else if (!strcmp(argv[i], "--replace")) {
427             ob_replace_wm = TRUE;
428         } else if (!strcmp(argv[i], "--sync")) {
429             xsync = TRUE;
430         } else if (!strcmp(argv[i], "--debug")) {
431             ob_debug_show_output(TRUE);
432         } else if (!strcmp(argv[i], "--reconfigure")) {
433             remote_control = 1;
434         } else if (!strcmp(argv[i], "--restart")) {
435             remote_control = 2;
436         }
437     }
438 }
439
440 static Cursor load_cursor(const gchar *name, guint fontval)
441 {
442     Cursor c = None;
443
444 #if USE_XCURSOR
445     c = XcursorLibraryLoadCursor(ob_display, name);
446 #endif
447     if (c == None)
448         c = XCreateFontCursor(ob_display, fontval);
449     return c;
450 }
451
452 void ob_exit_with_error(const gchar *msg)
453 {
454     g_critical(msg);
455     session_shutdown(TRUE);
456     exit(EXIT_FAILURE);
457 }
458
459 void ob_restart_other(const gchar *path)
460 {
461     restart_path = g_strdup(path);
462     ob_restart();
463 }
464
465 void ob_restart()
466 {
467     restart = TRUE;
468     ob_exit(0);
469 }
470
471 void ob_reconfigure()
472 {
473     reconfigure = TRUE;
474     ob_exit(0);
475 }
476
477 void ob_exit(gint code)
478 {
479     exitcode = code;
480     ob_main_loop_exit(ob_main_loop);
481 }
482
483 void ob_exit_replace()
484 {
485     exitcode = 0;
486     being_replaced = TRUE;
487     ob_main_loop_exit(ob_main_loop);
488 }
489
490 Cursor ob_cursor(ObCursor cursor)
491 {
492     g_assert(cursor < OB_NUM_CURSORS);
493     return cursors[cursor];
494 }
495
496 KeyCode ob_keycode(ObKey key)
497 {
498     g_assert(key < OB_NUM_KEYS);
499     return keys[key];
500 }
501
502 ObState ob_state()
503 {
504     return state;
505 }