Dogcows Code - chaz/openbox/blob - openbox/menu.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    menu.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 "menu.h"
  22 #include "openbox.h"
  23 #include "mainloop.h"
  24 #include "stacking.h"
  25 #include "client.h"
  26 #include "config.h"
  27 #include "screen.h"
  28 #include "menuframe.h"
  29 #include "keyboard.h"
  30 #include "geom.h"
  31 #include "misc.h"
  32 #include "client_menu.h"
  33 #include "client_list_menu.h"
  34 #include "client_list_combined_menu.h"
  35 #include "gettext.h"
  36 #include "parser/parse.h"
  37
  38 typedef struct _ObMenuParseState ObMenuParseState;
  39
  40 struct _ObMenuParseState
  41 {
  42     ObMenu *parent;
  43     ObMenu *pipe_creator;
  44 };
  45
  46 static GHashTable *menu_hash = NULL;
  47 static ObParseInst *menu_parse_inst;
  48 static ObMenuParseState menu_parse_state;
  49 static gboolean menu_can_hide = FALSE;
  50
  51 static void menu_destroy_hash_value(ObMenu *self);
  52 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  53                             gpointer data);
  54 static void parse_menu_separator(ObParseInst *i,
  55                                  xmlDocPtr doc, xmlNodePtr node,
  56                                  gpointer data);
  57 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  58                        gpointer data);
  59 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
  60                                gchar **strippedlabel, guint *position);
  61
  62
  63 static void client_dest(ObClient *client, gpointer data)
  64 {
  65     /* menus can be associated with a client, so close any that are since
  66        we are disappearing now */
  67     menu_frame_hide_all_client(client);
  68 }
  69
  70 void menu_startup(gboolean reconfig)
  71 {
  72     xmlDocPtr doc;
  73     xmlNodePtr node;
  74     gboolean loaded = FALSE;
  75     GSList *it;
  76
  77     menu_hash = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
  78                                       (GDestroyNotify)menu_destroy_hash_value);
  79
  80     client_list_menu_startup(reconfig);
  81     client_list_combined_menu_startup(reconfig);
  82     client_menu_startup();
  83
  84     menu_parse_inst = parse_startup();
  85
  86     menu_parse_state.parent = NULL;
  87     menu_parse_state.pipe_creator = NULL;
  88     parse_register(menu_parse_inst, "menu", parse_menu, &menu_parse_state);
  89     parse_register(menu_parse_inst, "item", parse_menu_item,
  90                    &menu_parse_state);
  91     parse_register(menu_parse_inst, "separator",
  92                    parse_menu_separator, &menu_parse_state);
  93
  94     for (it = config_menu_files; it; it = g_slist_next(it)) {
  95         if (parse_load_menu(it->data, &doc, &node)) {
  96             loaded = TRUE;
  97             parse_tree(menu_parse_inst, doc, node->children);
  98             xmlFreeDoc(doc);
  99         } else
 100             g_message(_("Unable to find a valid menu file '%s'"),
 101                       (const gchar*)it->data);
 102     }
 103     if (!loaded) {
 104         if (parse_load_menu("menu.xml", &doc, &node)) {
 105             parse_tree(menu_parse_inst, doc, node->children);
 106             xmlFreeDoc(doc);
 107         } else
 108             g_message(_("Unable to find a valid menu file '%s'"),
 109                       "menu.xml");
 110     }
 111
 112     g_assert(menu_parse_state.parent == NULL);
 113
 114     if (!reconfig)
 115         client_add_destroy_notify(client_dest, NULL);
 116 }
 117
 118 void menu_shutdown(gboolean reconfig)
 119 {
 120     if (!reconfig)
 121         client_remove_destroy_notify(client_dest);
 122
 123     parse_shutdown(menu_parse_inst);
 124     menu_parse_inst = NULL;
 125
 126     client_list_menu_shutdown(reconfig);
 127     client_list_combined_menu_shutdown(reconfig);
 128
 129     menu_frame_hide_all();
 130     g_hash_table_destroy(menu_hash);
 131     menu_hash = NULL;
 132 }
 133
 134 static gboolean menu_pipe_submenu(gpointer key, gpointer val, gpointer data)
 135 {
 136     ObMenu *menu = val;
 137     return menu->pipe_creator != NULL;
 138 }
 139
 140 static void clear_cache(gpointer key, gpointer val, gpointer data)
 141 {
 142     ObMenu *menu = val;
 143     if (menu->execute)
 144         menu_clear_entries(menu);
 145 }
 146
 147 void menu_clear_pipe_caches()
 148 {
 149     /* delete any pipe menus' submenus */
 150     g_hash_table_foreach_remove(menu_hash, menu_pipe_submenu, NULL);
 151     /* empty the top level pipe menus */
 152     g_hash_table_foreach(menu_hash, clear_cache, NULL);
 153 }
 154
 155 void menu_pipe_execute(ObMenu *self)
 156 {
 157     xmlDocPtr doc;
 158     xmlNodePtr node;
 159     gchar *output;
 160     GError *err = NULL;
 161
 162     if (!self->execute)
 163         return;
 164     if (self->entries) /* the entries are already created and cached */
 165         return;
 166
 167     if (!g_spawn_command_line_sync(self->execute, &output, NULL, NULL, &err)) {
 168         g_message(_("Failed to execute command for pipe-menu '%s': %s"),
 169                   self->execute, err->message);
 170         g_error_free(err);
 171         return;
 172     }
 173
 174     if (parse_load_mem(output, strlen(output),
 175                        "openbox_pipe_menu", &doc, &node))
 176     {
 177         menu_parse_state.pipe_creator = self;
 178         menu_parse_state.parent = self;
 179         parse_tree(menu_parse_inst, doc, node->children);
 180         xmlFreeDoc(doc);
 181     } else {
 182         g_message(_("Invalid output from pipe-menu '%s'"), self->execute);
 183     }
 184
 185     g_free(output);
 186 }
 187
 188 static ObMenu* menu_from_name(gchar *name)
 189 {
 190     ObMenu *self = NULL;
 191
 192     g_assert(name != NULL);
 193
 194     if (!(self = g_hash_table_lookup(menu_hash, name)))
 195         g_message(_("Attempted to access menu '%s' but it does not exist"),
 196                   name);
 197     return self;
 198 }
 199
 200 #define VALID_SHORTCUT(c) (((c) >= '0' && (c) <= '9') || \
 201                            ((c) >= 'A' && (c) <= 'Z') || \
 202                            ((c) >= 'a' && (c) <= 'z'))
 203
 204 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
 205                                gchar **strippedlabel, guint *position)
 206 {
 207     gunichar shortcut = 0;
 208
 209     *position = 0;
 210
 211     g_assert(strippedlabel != NULL);
 212
 213     if (label == NULL) {
 214         *strippedlabel = NULL;
 215     } else {
 216         gchar *i;
 217
 218         *strippedlabel = g_strdup(label);
 219
 220         /* if allow_shortcut is false, then you can't use the &, instead you
 221            have to just use the first valid character
 222         */
 223
 224         i = strchr(*strippedlabel, '&');
 225         if (allow_shortcut && i != NULL) {
 226             /* there is an ampersand in the string */
 227
 228             /* you have to use a printable ascii character for shortcuts
 229                don't allow space either, so you can have like "a & b"
 230             */
 231             if (VALID_SHORTCUT(*(i+1))) {
 232                 shortcut = g_unichar_tolower(g_utf8_get_char(i+1));
 233                 *position = i - *strippedlabel;
 234
 235                 /* remove the & from the string */
 236                 for (; *i != '\0'; ++i)
 237                     *i = *(i+1);
 238             }
 239         } else {
 240             /* there is no ampersand, so find the first valid character to use
 241                instead */
 242
 243             for (i = *strippedlabel; *i != '\0'; ++i)
 244                 if (VALID_SHORTCUT(*i)) {
 245                     *position = i - *strippedlabel;
 246                     shortcut = g_unichar_tolower(g_utf8_get_char(i));
 247                     break;
 248                 }
 249         }
 250     }
 251     return shortcut;
 252 }
 253
 254 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 255                             gpointer data)
 256 {
 257     ObMenuParseState *state = data;
 258     gchar *label;
 259
 260     if (state->parent) {
 261         if (parse_attr_string("label", node, &label)) {
 262             GSList *acts = NULL;
 263
 264             for (node = node->children; node; node = node->next)
 265                 if (!xmlStrcasecmp(node->name, (const xmlChar*) "action")) {
 266                     ObAction *a = action_parse
 267                         (i, doc, node, OB_USER_ACTION_MENU_SELECTION);
 268                     if (a)
 269                         acts = g_slist_append(acts, a);
 270                 }
 271             menu_add_normal(state->parent, -1, label, acts, FALSE);
 272             g_free(label);
 273         }
 274     }
 275 }
 276
 277 static void parse_menu_separator(ObParseInst *i,
 278                                  xmlDocPtr doc, xmlNodePtr node,
 279                                  gpointer data)
 280 {
 281     ObMenuParseState *state = data;
 282
 283     if (state->parent) {
 284         gchar *label;
 285
 286         if (!parse_attr_string("label", node, &label))
 287             label = NULL;
 288
 289         menu_add_separator(state->parent, -1, label);
 290         g_free(label);
 291     }
 292 }
 293
 294 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 295                        gpointer data)
 296 {
 297     ObMenuParseState *state = data;
 298     gchar *name = NULL, *title = NULL, *script = NULL;
 299     ObMenu *menu;
 300
 301     if (!parse_attr_string("id", node, &name))
 302         goto parse_menu_fail;
 303
 304     if (!g_hash_table_lookup(menu_hash, name)) {
 305         if (!parse_attr_string("label", node, &title))
 306             goto parse_menu_fail;
 307
 308         if ((menu = menu_new(name, title, FALSE, NULL))) {
 309             menu->pipe_creator = state->pipe_creator;
 310             if (parse_attr_string("execute", node, &script)) {
 311                 menu->execute = parse_expand_tilde(script);
 312             } else {
 313                 ObMenu *old;
 314
 315                 old = state->parent;
 316                 state->parent = menu;
 317                 parse_tree(i, doc, node->children);
 318                 state->parent = old;
 319             }
 320         }
 321     }
 322
 323     if (state->parent)
 324         menu_add_submenu(state->parent, -1, name);
 325
 326 parse_menu_fail:
 327     g_free(name);
 328     g_free(title);
 329     g_free(script);
 330 }
 331
 332 ObMenu* menu_new(const gchar *name, const gchar *title,
 333                  gboolean allow_shortcut_selection, gpointer data)
 334 {
 335     ObMenu *self;
 336
 337     self = g_new0(ObMenu, 1);
 338     self->name = g_strdup(name);
 339     self->data = data;
 340
 341     self->shortcut = parse_shortcut(title, allow_shortcut_selection,
 342                                     &self->title, &self->shortcut_position);
 343
 344     g_hash_table_replace(menu_hash, self->name, self);
 345
 346     /* Each menu has a single more_menu.  When the menu spills past what
 347        can fit on the screen, a new menu frame entry is created from this
 348        more_menu, and a new menu frame for the submenu is created for this
 349        menu, also pointing to the more_menu.
 350
 351        This can be done multiple times using the same more_menu.
 352
 353        more_menu->more_menu will always be NULL, since there is only 1 for
 354        each menu. */
 355     self->more_menu = g_new0(ObMenu, 1);
 356     self->more_menu->name = _("More...");
 357     self->more_menu->title = _("More...");
 358     self->more_menu->data = data;
 359     self->more_menu->shortcut = g_unichar_tolower(g_utf8_get_char("M"));
 360
 361     self->more_menu->show_func = self->show_func;
 362     self->more_menu->hide_func = self->hide_func;
 363     self->more_menu->update_func = self->update_func;
 364     self->more_menu->execute_func = self->execute_func;
 365     self->more_menu->destroy_func = self->destroy_func;
 366     self->more_menu->place_func = self->place_func;
 367
 368     return self;
 369 }
 370
 371 static void menu_destroy_hash_value(ObMenu *self)
 372 {
 373     /* make sure its not visible */
 374     {
 375         GList *it;
 376         ObMenuFrame *f;
 377
 378         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 379             f = it->data;
 380             if (f->menu == self)
 381                 menu_frame_hide_all();
 382         }
 383     }
 384
 385     if (self->destroy_func)
 386         self->destroy_func(self, self->data);
 387
 388     menu_clear_entries(self);
 389     g_free(self->name);
 390     g_free(self->title);
 391     g_free(self->execute);
 392     g_free(self->more_menu);
 393
 394     g_free(self);
 395 }
 396
 397 void menu_free(ObMenu *menu)
 398 {
 399     if (menu)
 400         g_hash_table_remove(menu_hash, menu->name);
 401 }
 402
 403 static gboolean menu_hide_delay_func(gpointer data)
 404 {
 405     menu_can_hide = TRUE;
 406     return FALSE; /* no repeat */
 407 }
 408
 409 void menu_show(gchar *name, gint x, gint y, gint button, ObClient *client)
 410 {
 411     ObMenu *self;
 412     ObMenuFrame *frame;
 413
 414     if (!(self = menu_from_name(name))
 415         || keyboard_interactively_grabbed()) return;
 416
 417     /* if the requested menu is already the top visible menu, then don't
 418        bother */
 419     if (menu_frame_visible) {
 420         frame = menu_frame_visible->data;
 421         if (frame->menu == self)
 422             return;
 423     }
 424
 425     menu_frame_hide_all();
 426
 427     /* clear the pipe menus when showing a new menu */
 428     menu_clear_pipe_caches();
 429
 430     frame = menu_frame_new(self, 0, client);
 431     if (!menu_frame_show_topmenu(frame, x, y, button))
 432         menu_frame_free(frame);
 433     else if (!button) {
 434         /* select the first entry if it's not a submenu and we opened
 435          * the menu with the keyboard, and skip all headers */
 436         GList *it = frame->entries;
 437         while (it) {
 438             ObMenuEntryFrame *e = it->data;
 439             if (e->entry->type == OB_MENU_ENTRY_TYPE_NORMAL) {
 440                 menu_frame_select(frame, e, FALSE);
 441                 break;
 442             } else if (e->entry->type == OB_MENU_ENTRY_TYPE_SEPARATOR)
 443                 it = g_list_next(it);
 444             else
 445                 break;
 446         }
 447     }
 448
 449     if (!button)
 450         menu_can_hide = TRUE;
 451     else {
 452         menu_can_hide = FALSE;
 453         ob_main_loop_timeout_add(ob_main_loop,
 454                                  config_menu_hide_delay * 1000,
 455                                  menu_hide_delay_func,
 456                                  NULL, g_direct_equal, NULL);
 457     }
 458 }
 459
 460 gboolean menu_hide_delay_reached()
 461 {
 462     return menu_can_hide;
 463 }
 464
 465 static ObMenuEntry* menu_entry_new(ObMenu *menu, ObMenuEntryType type, gint id)
 466 {
 467     ObMenuEntry *self;
 468
 469     g_assert(menu);
 470
 471     self = g_new0(ObMenuEntry, 1);
 472     self->ref = 1;
 473     self->type = type;
 474     self->menu = menu;
 475     self->id = id;
 476
 477     switch (type) {
 478     case OB_MENU_ENTRY_TYPE_NORMAL:
 479         self->data.normal.enabled = TRUE;
 480         break;
 481     case OB_MENU_ENTRY_TYPE_SUBMENU:
 482     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 483         break;
 484     }
 485
 486     return self;
 487 }
 488
 489 void menu_entry_ref(ObMenuEntry *self)
 490 {
 491     ++self->ref;
 492 }
 493
 494 void menu_entry_unref(ObMenuEntry *self)
 495 {
 496     if (self && --self->ref == 0) {
 497         switch (self->type) {
 498         case OB_MENU_ENTRY_TYPE_NORMAL:
 499             g_free(self->data.normal.label);
 500             while (self->data.normal.actions) {
 501                 action_unref(self->data.normal.actions->data);
 502                 self->data.normal.actions =
 503                     g_slist_delete_link(self->data.normal.actions,
 504                                         self->data.normal.actions);
 505             }
 506             break;
 507         case OB_MENU_ENTRY_TYPE_SUBMENU:
 508             g_free(self->data.submenu.name);
 509             break;
 510         case OB_MENU_ENTRY_TYPE_SEPARATOR:
 511             break;
 512         }
 513
 514         g_free(self);
 515     }
 516 }
 517
 518 void menu_clear_entries(ObMenu *self)
 519 {
 520 #ifdef DEBUG
 521     /* assert that the menu isn't visible */
 522     {
 523         GList *it;
 524         ObMenuFrame *f;
 525
 526         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 527             f = it->data;
 528             g_assert(f->menu != self);
 529         }
 530     }
 531 #endif
 532
 533     while (self->entries) {
 534         menu_entry_unref(self->entries->data);
 535         self->entries = g_list_delete_link(self->entries, self->entries);
 536     }
 537     self->more_menu->entries = self->entries; /* keep it in sync */
 538 }
 539
 540 void menu_entry_remove(ObMenuEntry *self)
 541 {
 542     self->menu->entries = g_list_remove(self->menu->entries, self);
 543     menu_entry_unref(self);
 544 }
 545
 546 ObMenuEntry* menu_add_normal(ObMenu *self, gint id, const gchar *label,
 547                              GSList *actions, gboolean allow_shortcut)
 548 {
 549     ObMenuEntry *e;
 550
 551     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_NORMAL, id);
 552     e->data.normal.actions = actions;
 553
 554     menu_entry_set_label(e, label, allow_shortcut);
 555
 556     self->entries = g_list_append(self->entries, e);
 557     self->more_menu->entries = self->entries; /* keep it in sync */
 558     return e;
 559 }
 560
 561 ObMenuEntry* menu_get_more(ObMenu *self, guint show_from)
 562 {
 563     ObMenuEntry *e;
 564     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, -1);
 565     /* points to itself */
 566     e->data.submenu.name = g_strdup(self->name);
 567     e->data.submenu.submenu = self;
 568     e->data.submenu.show_from = show_from;
 569     return e;
 570 }
 571
 572 ObMenuEntry* menu_add_submenu(ObMenu *self, gint id, const gchar *submenu)
 573 {
 574     ObMenuEntry *e;
 575
 576     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, id);
 577     e->data.submenu.name = g_strdup(submenu);
 578
 579     self->entries = g_list_append(self->entries, e);
 580     self->more_menu->entries = self->entries; /* keep it in sync */
 581     return e;
 582 }
 583
 584 ObMenuEntry* menu_add_separator(ObMenu *self, gint id, const gchar *label)
 585 {
 586     ObMenuEntry *e;
 587
 588     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SEPARATOR, id);
 589
 590     menu_entry_set_label(e, label, FALSE);
 591
 592     self->entries = g_list_append(self->entries, e);
 593     self->more_menu->entries = self->entries; /* keep it in sync */
 594     return e;
 595 }
 596
 597 void menu_set_show_func(ObMenu *self, ObMenuShowFunc func)
 598 {
 599     self->show_func = func;
 600     self->more_menu->show_func = func; /* keep it in sync */
 601 }
 602
 603 void menu_set_hide_func(ObMenu *self, ObMenuHideFunc func)
 604 {
 605     self->hide_func = func;
 606     self->more_menu->hide_func = func; /* keep it in sync */
 607 }
 608
 609 void menu_set_update_func(ObMenu *self, ObMenuUpdateFunc func)
 610 {
 611     self->update_func = func;
 612     self->more_menu->update_func = func; /* keep it in sync */
 613 }
 614
 615 void menu_set_execute_func(ObMenu *self, ObMenuExecuteFunc func)
 616 {
 617     self->execute_func = func;
 618     self->more_menu->execute_func = func; /* keep it in sync */
 619 }
 620
 621 void menu_set_destroy_func(ObMenu *self, ObMenuDestroyFunc func)
 622 {
 623     self->destroy_func = func;
 624     self->more_menu->destroy_func = func; /* keep it in sync */
 625 }
 626
 627 void menu_set_place_func(ObMenu *self, ObMenuPlaceFunc func)
 628 {
 629     self->place_func = func;
 630     self->more_menu->place_func = func; /* keep it in sync */
 631 }
 632
 633 ObMenuEntry* menu_find_entry_id(ObMenu *self, gint id)
 634 {
 635     ObMenuEntry *ret = NULL;
 636     GList *it;
 637
 638     for (it = self->entries; it; it = g_list_next(it)) {
 639         ObMenuEntry *e = it->data;
 640
 641         if (e->id == id) {
 642             ret = e;
 643             break;
 644         }
 645     }
 646     return ret;
 647 }
 648
 649 void menu_find_submenus(ObMenu *self)
 650 {
 651     GList *it;
 652
 653     for (it = self->entries; it; it = g_list_next(it)) {
 654         ObMenuEntry *e = it->data;
 655
 656         if (e->type == OB_MENU_ENTRY_TYPE_SUBMENU)
 657             e->data.submenu.submenu = menu_from_name(e->data.submenu.name);
 658     }
 659 }
 660
 661 void menu_entry_set_label(ObMenuEntry *self, const gchar *label,
 662                           gboolean allow_shortcut)
 663 {
 664     switch (self->type) {
 665     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 666         g_free(self->data.separator.label);
 667         self->data.separator.label = g_strdup(label);
 668         break;
 669     case OB_MENU_ENTRY_TYPE_NORMAL:
 670         g_free(self->data.normal.label);
 671         self->data.normal.shortcut =
 672             parse_shortcut(label, allow_shortcut, &self->data.normal.label,
 673                            &self->data.normal.shortcut_position);
 674         break;
 675     default:
 676         g_assert_not_reached();
 677     }
 678 }
 679
 680 void menu_show_all_shortcuts(ObMenu *self, gboolean show)
 681 {
 682     self->show_all_shortcuts = show;
 683 }