1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1998, 2001 Tim Janik
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #include "gtkaccelmap.h"
24 #include "gtkwindow.h" /* in lack of GtkAcceleratable */
38 /* --- structures --- */
40 const gchar *accel_path;
51 /* --- variables --- */
52 static GHashTable *accel_entry_ht = NULL; /* accel_path -> AccelEntry */
53 static GSList *accel_filters = NULL;
54 static GHookList *change_hooks = NULL;
56 /* --- functions --- */
58 accel_entry_hash (gconstpointer key)
60 const AccelEntry *entry = key;
62 return g_str_hash (entry->accel_path);
66 accel_entry_equal (gconstpointer key1,
69 const AccelEntry *entry1 = key1;
70 const AccelEntry *entry2 = key2;
72 return g_str_equal (entry1->accel_path, entry2->accel_path);
75 static inline AccelEntry*
76 accel_path_lookup (const gchar *accel_path)
80 ekey.accel_path = accel_path;
82 /* safety NULL check for return_if_fail()s */
83 return accel_path ? g_hash_table_lookup (accel_entry_ht, &ekey) : NULL;
87 _gtk_accel_map_init (void)
89 g_assert (accel_entry_ht == NULL);
91 accel_entry_ht = g_hash_table_new (accel_entry_hash, accel_entry_equal);
95 _gtk_accel_path_is_valid (const gchar *accel_path)
99 if (!accel_path || accel_path[0] != '<' ||
100 accel_path[1] == '<' || accel_path[1] == '>' || !accel_path[1])
102 p = strchr (accel_path, '>');
103 if (!p || p[1] != '/')
109 * gtk_accel_map_add_entry:
110 * @accel_path: valid accelerator path
111 * @accel_key: the accelerator key
112 * @accel_mods: the accelerator modifiers
114 * Registers a new accelerator with the global accelerator map.
115 * This function should only be called once per @accel_path
116 * with the canonical @accel_key and @accel_mods for this path.
117 * To change the accelerator during runtime programatically, use
118 * gtk_accel_map_change_entry().
119 * The accelerator path must consist of "<WINDOWTYPE>/Category1/Category2/.../Action",
120 * where <WINDOWTYPE> should be a unique application-specific identifier, that
121 * corresponds to the kind of window the accelerator is being used in, e.g. "Gimp-Image",
122 * "Abiword-Document" or "Gnumeric-Settings".
123 * The Category1/.../Action portion is most appropriately chosen by the action the
124 * accelerator triggers, i.e. for accelerators on menu items, choose the item's menu path,
125 * e.g. "File/Save As", "Image/View/Zoom" or "Edit/Select All".
126 * So a full valid accelerator path may look like:
127 * "<Gimp-Toolbox>/File/Dialogs/Tool Options...".
130 gtk_accel_map_add_entry (const gchar *accel_path,
132 GdkModifierType accel_mods)
136 g_return_if_fail (_gtk_accel_path_is_valid (accel_path));
141 accel_mods &= gtk_accelerator_get_default_mod_mask ();
143 entry = accel_path_lookup (accel_path);
146 if (!entry->std_accel_key && !entry->std_accel_mods &&
147 (accel_key || accel_mods))
149 entry->std_accel_key = accel_key;
150 entry->std_accel_mods = accel_mods;
152 gtk_accel_map_change_entry (entry->accel_path, accel_key, accel_mods, TRUE);
157 entry = g_new0 (AccelEntry, 1);
158 entry->accel_path = g_quark_to_string (g_quark_from_string (accel_path));
159 entry->std_accel_key = accel_key;
160 entry->std_accel_mods = accel_mods;
161 entry->accel_key = accel_key;
162 entry->accel_mods = accel_mods;
163 entry->changed = FALSE;
164 entry->lock_count = 0;
165 g_hash_table_insert (accel_entry_ht, entry, entry);
170 * gtk_accel_map_lookup_entry:
171 * @accel_path: a valid accelerator path
172 * @key: the accelerator key to be filled in (optional)
173 * @returns: %TRUE if @accel_path is known, %FALSE otherwise
175 * Looks up the accelerator entry for @accel_path and fills in @key.
178 gtk_accel_map_lookup_entry (const gchar *accel_path,
183 g_return_val_if_fail (_gtk_accel_path_is_valid (accel_path), FALSE);
185 entry = accel_path_lookup (accel_path);
188 key->accel_key = entry->accel_key;
189 key->accel_mods = entry->accel_mods;
190 key->accel_flags = 0;
193 return entry ? TRUE : FALSE;
197 hash2slist_foreach (gpointer key,
201 GSList **slist_p = user_data;
203 *slist_p = g_slist_prepend (*slist_p, value);
207 g_hash_table_slist_values (GHashTable *hash_table)
209 GSList *slist = NULL;
211 g_return_val_if_fail (hash_table != NULL, NULL);
213 g_hash_table_foreach (hash_table, hash2slist_foreach, &slist);
218 /* if simulate==TRUE, return whether accel_path can be changed to
219 * accel_key && accel_mods. otherwise, return whether accel_path
220 * was actually changed.
223 internal_change_entry (const gchar *accel_path,
225 GdkModifierType accel_mods,
229 GSList *node, *slist, *win_list, *group_list, *replace_list = NULL;
230 GHashTable *group_hm, *window_hm;
231 gboolean change_accel, removable, can_change = TRUE, seen_accel = FALSE;
233 AccelEntry *entry = accel_path_lookup (accel_path);
235 /* not much todo if there's no entry yet */
240 gtk_accel_map_add_entry (accel_path, 0, 0);
241 entry = accel_path_lookup (accel_path);
242 entry->accel_key = accel_key;
243 entry->accel_mods = accel_mods;
244 entry->changed = TRUE;
249 /* if there's nothing to change, not much todo either */
250 if (entry->accel_key == accel_key && entry->accel_mods == accel_mods)
253 entry->changed = TRUE;
254 return simulate ? TRUE : FALSE;
257 /* The no-change case has already been handled, so
258 * simulate doesn't make a difference here.
260 if (entry->lock_count > 0)
263 /* nobody's interested, easy going */
268 entry->accel_key = accel_key;
269 entry->accel_mods = accel_mods;
270 entry->changed = TRUE;
275 /* 1) fetch all accel groups affected by this entry */
276 entry_quark = g_quark_try_string (entry->accel_path);
277 group_hm = g_hash_table_new (NULL, NULL);
278 window_hm = g_hash_table_new (NULL, NULL);
279 for (slist = entry->groups; slist; slist = slist->next)
280 g_hash_table_insert (group_hm, slist->data, slist->data);
282 /* 2) collect acceleratables affected */
283 group_list = g_hash_table_slist_values (group_hm);
284 for (slist = group_list; slist; slist = slist->next)
286 GtkAccelGroup *group = slist->data;
288 for (node = group->acceleratables; node; node = node->next)
289 g_hash_table_insert (window_hm, node->data, node->data);
291 g_slist_free (group_list);
293 /* 3) include all accel groups used by acceleratables */
294 win_list = g_hash_table_slist_values (window_hm);
295 g_hash_table_destroy (window_hm);
296 for (slist = win_list; slist; slist = slist->next)
297 for (node = gtk_accel_groups_from_object (slist->data); node; node = node->next)
298 g_hash_table_insert (group_hm, node->data, node->data);
299 group_list = g_hash_table_slist_values (group_hm);
300 g_hash_table_destroy (group_hm);
302 /* 4) walk the acceleratables and figure whether they occupy accel_key&accel_mods */
304 for (slist = win_list; slist; slist = slist->next)
305 if (GTK_IS_WINDOW (slist->data)) /* bad kludge in lack of a GtkAcceleratable */
306 if (_gtk_window_query_nonaccels (slist->data, accel_key, accel_mods))
311 removable = !seen_accel;
313 /* 5) walk all accel groups and search for locks */
315 for (slist = group_list; slist; slist = slist->next)
317 GtkAccelGroup *group = slist->data;
318 GtkAccelGroupEntry *ag_entry;
322 ag_entry = entry->accel_key ? gtk_accel_group_query (group, entry->accel_key, entry->accel_mods, &n) : NULL;
323 for (i = 0; i < n; i++)
324 if (ag_entry[i].accel_path_quark == entry_quark)
326 can_change = !(ag_entry[i].key.accel_flags & GTK_ACCEL_LOCKED);
328 goto break_loop_step5;
332 ag_entry = accel_key ? gtk_accel_group_query (group, accel_key, accel_mods, &n) : NULL;
333 for (i = 0; i < n; i++)
336 removable = !group->lock_count && !(ag_entry[i].key.accel_flags & GTK_ACCEL_LOCKED);
338 goto break_loop_step5;
339 if (ag_entry[i].accel_path_quark)
340 replace_list = g_slist_prepend (replace_list, GUINT_TO_POINTER (ag_entry->accel_path_quark));
345 /* 6) check whether we can remove existing accelerators */
346 if (removable && can_change)
347 for (slist = replace_list; slist; slist = slist->next)
348 if (!internal_change_entry (g_quark_to_string (GPOINTER_TO_UINT (slist->data)), 0, 0, FALSE, TRUE))
354 /* 7) check conditions and proceed if possible */
355 change_accel = can_change && (!seen_accel || (removable && replace));
357 if (change_accel && !simulate)
359 guint old_accel_key, old_accel_mods;
361 /* ref accel groups */
362 for (slist = group_list; slist; slist = slist->next)
363 g_object_ref (slist->data);
365 /* 8) remove existing accelerators */
366 for (slist = replace_list; slist; slist = slist->next)
367 internal_change_entry (g_quark_to_string (GPOINTER_TO_UINT (slist->data)), 0, 0, FALSE, FALSE);
369 /* 9) install new accelerator */
370 old_accel_key = entry->accel_key;
371 old_accel_mods = entry->accel_mods;
372 entry->accel_key = accel_key;
373 entry->accel_mods = accel_mods;
374 entry->changed = TRUE;
376 for (slist = group_list; slist; slist = slist->next)
377 _gtk_accel_group_reconnect (slist->data, g_quark_from_string (entry->accel_path));
379 /* unref accel groups */
380 for (slist = group_list; slist; slist = slist->next)
381 g_object_unref (slist->data);
383 g_slist_free (replace_list);
384 g_slist_free (group_list);
385 g_slist_free (win_list);
391 * gtk_accel_map_change_entry:
392 * @accel_path: a valid accelerator path
393 * @accel_key: the new accelerator key
394 * @accel_mods: the new accelerator modifiers
395 * @replace: %TRUE if other accelerators may be deleted upon conflicts
396 * @returns: %TRUE if the accelerator could be changed, %FALSE otherwise
398 * Changes the @accel_key and @accel_mods currently associated with @accel_path.
399 * Due to conflicts with other accelerators, a change may not always be possible,
400 * @replace indicates whether other accelerators may be deleted to resolve such
401 * conflicts. A change will only occur if all conflicts could be resolved (which
402 * might not be the case if conflicting accelerators are locked). Successful
403 * changes are indicated by a %TRUE return value.
406 gtk_accel_map_change_entry (const gchar *accel_path,
408 GdkModifierType accel_mods,
411 g_return_val_if_fail (_gtk_accel_path_is_valid (accel_path), FALSE);
413 return internal_change_entry (accel_path, accel_key, accel_key ? accel_mods : 0, replace, FALSE);
417 accel_map_parse_accel_path (GScanner *scanner)
420 GdkModifierType accel_mods = 0;
423 /* parse accel path */
424 g_scanner_get_next_token (scanner);
425 if (scanner->token != G_TOKEN_STRING)
426 return G_TOKEN_STRING;
428 /* test if the next token is an accelerator */
429 g_scanner_peek_next_token (scanner);
430 if (scanner->next_token != G_TOKEN_STRING)
432 /* if not so, eat that token and error out */
433 g_scanner_get_next_token (scanner);
434 return G_TOKEN_STRING;
437 /* get the full accelerator specification */
438 path = g_strdup (scanner->value.v_string);
439 g_scanner_get_next_token (scanner);
440 accel = g_strdup (scanner->value.v_string);
442 /* ensure the entry is present */
443 gtk_accel_map_add_entry (path, 0, 0);
445 /* and propagate it */
446 gtk_accelerator_parse (accel, &accel_key, &accel_mods);
447 gtk_accel_map_change_entry (path, accel_key, accel_mods, TRUE);
452 /* check correct statement end */
453 g_scanner_get_next_token (scanner);
454 if (scanner->token != ')')
461 accel_map_parse_statement (GScanner *scanner)
463 guint expected_token;
465 g_scanner_get_next_token (scanner);
467 if (scanner->token == G_TOKEN_SYMBOL)
469 guint (*parser_func) (GScanner*);
471 parser_func = (guint (*) (GScanner *))scanner->value.v_symbol;
473 expected_token = parser_func (scanner);
476 expected_token = G_TOKEN_SYMBOL;
478 /* skip rest of statement on errrors
480 if (expected_token != G_TOKEN_NONE)
482 register guint level;
485 if (scanner->token == ')')
487 if (scanner->token == '(')
490 while (!g_scanner_eof (scanner) && level > 0)
492 g_scanner_get_next_token (scanner);
494 if (scanner->token == '(')
496 else if (scanner->token == ')')
503 * gtk_accel_map_load_scanner:
504 * @scanner: a #GScanner which has already been provided with an input file
506 * #GScanner variant of gtk_accel_map_load().
509 gtk_accel_map_load_scanner (GScanner *scanner)
511 gboolean skip_comment_single;
512 gboolean symbol_2_token;
513 gchar *cpair_comment_single;
514 gpointer saved_symbol;
516 g_return_if_fail (scanner != 0);
518 /* configure scanner */
519 skip_comment_single = scanner->config->skip_comment_single;
520 scanner->config->skip_comment_single = TRUE;
521 cpair_comment_single = scanner->config->cpair_comment_single;
522 scanner->config->cpair_comment_single = ";\n";
523 symbol_2_token = scanner->config->symbol_2_token;
524 scanner->config->symbol_2_token = FALSE;
525 saved_symbol = g_scanner_lookup_symbol (scanner, "gtk_accel_path");
526 g_scanner_scope_add_symbol (scanner, 0, "gtk_accel_path",
527 accel_map_parse_accel_path);
529 /* outer parsing loop
531 g_scanner_peek_next_token (scanner);
532 while (scanner->next_token == '(')
534 g_scanner_get_next_token (scanner);
536 accel_map_parse_statement (scanner);
538 g_scanner_peek_next_token (scanner);
542 scanner->config->skip_comment_single = skip_comment_single;
543 scanner->config->cpair_comment_single = cpair_comment_single;
544 scanner->config->symbol_2_token = symbol_2_token;
545 g_scanner_scope_remove_symbol (scanner, 0, "gtk_accel_path");
547 g_scanner_scope_add_symbol (scanner, 0, "gtk_accel_path", saved_symbol);
551 * gtk_accel_map_load_fd:
552 * @fd: a valid readable file descriptor
554 * Filedescriptor variant of gtk_accel_map_load().
556 * Note that the file descriptor will not be closed by this function.
559 gtk_accel_map_load_fd (gint fd)
563 g_return_if_fail (fd >= 0);
565 /* create and setup scanner */
566 scanner = g_scanner_new (NULL);
567 g_scanner_input_file (scanner, fd);
569 gtk_accel_map_load_scanner (scanner);
571 g_scanner_destroy (scanner);
575 * gtk_accel_map_load:
576 * @file_name: a file containing accelerator specifications
578 * Parses a file previously saved with gtk_accel_map_save() for
579 * accelerator specifications, and propagates them accordingly.
582 gtk_accel_map_load (const gchar *file_name)
586 g_return_if_fail (file_name != NULL);
588 if (!g_file_test (file_name, G_FILE_TEST_IS_REGULAR))
591 fd = open (file_name, O_RDONLY);
595 gtk_accel_map_load_fd (fd);
607 gssize count = write (fd, buf, to_write);
624 accel_map_print (gpointer data,
625 const gchar *accel_path,
627 GdkModifierType accel_mods,
630 GString *gstring = g_string_new (changed ? NULL : "; ");
631 gint fd = GPOINTER_TO_INT (data);
634 g_string_append (gstring, "(gtk_accel_path \"");
636 tmp = g_strescape (accel_path, NULL);
637 g_string_append (gstring, tmp);
640 g_string_append (gstring, "\" \"");
642 name = gtk_accelerator_name (accel_key, accel_mods);
643 tmp = g_strescape (name, NULL);
645 g_string_append (gstring, tmp);
648 g_string_append (gstring, "\")\n");
650 write_all (fd, gstring->str, gstring->len);
652 g_string_free (gstring, TRUE);
656 * gtk_accel_map_save_fd:
657 * @fd: a valid writable file descriptor
659 * Filedescriptor variant of gtk_accel_map_save().
661 * Note that the file descriptor will not be closed by this function.
664 gtk_accel_map_save_fd (gint fd)
668 g_return_if_fail (fd >= 0);
670 gstring = g_string_new ("; ");
671 if (g_get_prgname ())
672 g_string_append (gstring, g_get_prgname ());
673 g_string_append (gstring, " GtkAccelMap rc-file -*- scheme -*-\n");
674 g_string_append (gstring, "; this file is an automated accelerator map dump\n");
675 g_string_append (gstring, ";\n");
677 write_all (fd, gstring->str, gstring->len);
679 g_string_free (gstring, TRUE);
681 gtk_accel_map_foreach (GINT_TO_POINTER (fd), accel_map_print);
685 * gtk_accel_map_save:
686 * @file_name: the file to contain accelerator specifications
688 * Saves current accelerator specifications (accelerator path, key
689 * and modifiers) to @file_name.
690 * The file is written in a format suitable to be read back in by
691 * gtk_accel_map_load().
694 gtk_accel_map_save (const gchar *file_name)
698 g_return_if_fail (file_name != NULL);
700 fd = open (file_name, O_CREAT | O_TRUNC | O_WRONLY, 0644);
704 gtk_accel_map_save_fd (fd);
710 * gtk_accel_map_foreach:
711 * @data: data to be passed into @foreach_func
712 * @foreach_func: function to be executed for each accel map entry which
713 * is not filtered out
715 * Loops over the entries in the accelerator map whose accel path
716 * doesn't match any of the filters added with gtk_accel_map_add_filter(),
717 * and execute @foreach_func on each. The signature of @foreach_func is
718 * that of #GtkAccelMapForeach, the @changed parameter indicates whether
719 * this accelerator was changed during runtime (thus, would need
720 * saving during an accelerator map dump).
723 gtk_accel_map_foreach (gpointer data,
724 GtkAccelMapForeach foreach_func)
726 GSList *entries, *slist, *node;
728 g_return_if_fail (foreach_func != NULL);
730 entries = g_hash_table_slist_values (accel_entry_ht);
731 for (slist = entries; slist; slist = slist->next)
733 AccelEntry *entry = slist->data;
734 gboolean changed = entry->accel_key != entry->std_accel_key || entry->accel_mods != entry->std_accel_mods;
736 for (node = accel_filters; node; node = node->next)
737 if (g_pattern_match_string (node->data, entry->accel_path))
739 foreach_func (data, entry->accel_path, entry->accel_key, entry->accel_mods, changed);
743 g_slist_free (entries);
747 * gtk_accel_map_foreach_unfiltered:
748 * @data: data to be passed into @foreach_func
749 * @foreach_func: function to be executed for each accel map entry
751 * Loops over all entries in the accelerator map, and execute
752 * @foreach_func on each. The signature of @foreach_func is that of
753 * #GtkAccelMapForeach, the @changed parameter indicates whether
754 * this accelerator was changed during runtime (thus, would need
755 * saving during an accelerator map dump).
758 gtk_accel_map_foreach_unfiltered (gpointer data,
759 GtkAccelMapForeach foreach_func)
761 GSList *entries, *slist;
763 g_return_if_fail (foreach_func != NULL);
765 entries = g_hash_table_slist_values (accel_entry_ht);
766 for (slist = entries; slist; slist = slist->next)
768 AccelEntry *entry = slist->data;
769 gboolean changed = entry->accel_key != entry->std_accel_key || entry->accel_mods != entry->std_accel_mods;
771 foreach_func (data, entry->accel_path, entry->accel_key, entry->accel_mods, changed);
773 g_slist_free (entries);
777 * gtk_accel_map_add_filter:
778 * @filter_pattern: a pattern (see #GPatternSpec)
780 * Adds a filter to the global list of accel path filters.
782 * Accel map entries whose accel path matches one of the filters
783 * are skipped by gtk_accel_map_foreach().
785 * This function is intended for GTK+ modules that create their own
786 * menus, but don't want them to be saved into the applications accelerator
790 gtk_accel_map_add_filter (const gchar *filter_pattern)
795 g_return_if_fail (filter_pattern != NULL);
797 pspec = g_pattern_spec_new (filter_pattern);
798 for (slist = accel_filters; slist; slist = slist->next)
799 if (g_pattern_spec_equal (pspec, slist->data))
801 g_pattern_spec_free (pspec);
804 accel_filters = g_slist_prepend (accel_filters, pspec);
808 _gtk_accel_map_add_group (const gchar *accel_path,
809 GtkAccelGroup *accel_group)
813 g_return_if_fail (_gtk_accel_path_is_valid (accel_path));
814 g_return_if_fail (GTK_IS_ACCEL_GROUP (accel_group));
816 entry = accel_path_lookup (accel_path);
819 gtk_accel_map_add_entry (accel_path, 0, 0);
820 entry = accel_path_lookup (accel_path);
822 entry->groups = g_slist_prepend (entry->groups, accel_group);
826 _gtk_accel_map_remove_group (const gchar *accel_path,
827 GtkAccelGroup *accel_group)
831 entry = accel_path_lookup (accel_path);
832 g_return_if_fail (entry != NULL);
833 g_return_if_fail (g_slist_find (entry->groups, accel_group));
835 entry->groups = g_slist_remove (entry->groups, accel_group);
840 * gtk_accel_map_lock_path:
841 * @accel_path: a valid accelerator path
843 * Locks the given accelerator path. If the accelerator map doesn't yet contain
844 * an entry for @accel_path, a new one is created.
846 * Locking an accelerator path prevents its accelerator from being changed
847 * during runtime. A locked accelerator path can be unlocked by
848 * gtk_accel_map_unlock_path(). Refer to gtk_accel_map_change_entry()
849 * for information about runtime accelerator changes.
851 * If called more than once, @accel_path remains locked until
852 * gtk_accel_map_unlock_path() has been called an equivalent number
855 * Note that locking of individual accelerator paths is independent from
856 * locking the #GtkAccelGroup containing them. For runtime accelerator
857 * changes to be possible both the accelerator path and its #GtkAccelGroup
858 * have to be unlocked.
863 gtk_accel_map_lock_path (const gchar *accel_path)
867 g_return_if_fail (_gtk_accel_path_is_valid (accel_path));
869 entry = accel_path_lookup (accel_path);
873 gtk_accel_map_add_entry (accel_path, 0, 0);
874 entry = accel_path_lookup (accel_path);
877 entry->lock_count += 1;
881 * gtk_accel_map_unlock_path:
882 * @accel_path: a valid accelerator path
884 * Undoes the last call to gtk_accel_map_lock_path() on this @accel_path.
885 * Refer to gtk_accel_map_lock_path() for information about accelerator path locking.
890 gtk_accel_map_unlock_path (const gchar *accel_path)
894 g_return_if_fail (_gtk_accel_path_is_valid (accel_path));
896 entry = accel_path_lookup (accel_path);
898 g_return_if_fail (entry != NULL && entry->lock_count > 0);
900 entry->lock_count -= 1;