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 "grab.h"
  26 #include "client.h"
  27 #include "config.h"
  28 #include "actions.h"
  29 #include "screen.h"
  30 #include "menuframe.h"
  31 #include "keyboard.h"
  32 #include "geom.h"
  33 #include "misc.h"
  34 #include "client_menu.h"
  35 #include "client_list_menu.h"
  36 #include "client_list_combined_menu.h"
  37 #include "gettext.h"
  38 #include "parser/parse.h"
  39
  40 typedef struct _ObMenuParseState ObMenuParseState;
  41
  42 struct _ObMenuParseState
  43 {
  44     ObMenu *parent;
  45     ObMenu *pipe_creator;
  46 };
  47
  48 static GHashTable *menu_hash = NULL;
  49 static ObParseInst *menu_parse_inst;
  50 static ObMenuParseState menu_parse_state;
  51 static gboolean menu_can_hide = FALSE;
  52
  53 static void menu_destroy_hash_value(ObMenu *self);
  54 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  55                             gpointer data);
  56 static void parse_menu_separator(ObParseInst *i,
  57                                  xmlDocPtr doc, xmlNodePtr node,
  58                                  gpointer data);
  59 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  60                        gpointer data);
  61 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
  62                                gchar **strippedlabel, guint *position);
  63
  64
  65 static void client_dest(ObClient *client, gpointer data)
  66 {
  67     /* menus can be associated with a client, so close any that are since
  68        we are disappearing now */
  69     menu_frame_hide_all_client(client);
  70 }
  71
  72 void menu_startup(gboolean reconfig)
  73 {
  74     xmlDocPtr doc;
  75     xmlNodePtr node;
  76     gboolean loaded = FALSE;
  77     GSList *it;
  78
  79     menu_hash = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
  80                                       (GDestroyNotify)menu_destroy_hash_value);
  81
  82     client_list_menu_startup(reconfig);
  83     client_list_combined_menu_startup(reconfig);
  84     client_menu_startup();
  85
  86     menu_parse_inst = parse_startup();
  87
  88     menu_parse_state.parent = NULL;
  89     menu_parse_state.pipe_creator = NULL;
  90     parse_register(menu_parse_inst, "menu", parse_menu, &menu_parse_state);
  91     parse_register(menu_parse_inst, "item", parse_menu_item,
  92                    &menu_parse_state);
  93     parse_register(menu_parse_inst, "separator",
  94                    parse_menu_separator, &menu_parse_state);
  95
  96     for (it = config_menu_files; it; it = g_slist_next(it)) {
  97         if (parse_load_menu(it->data, &doc, &node)) {
  98             loaded = TRUE;
  99             parse_tree(menu_parse_inst, doc, node->children);
 100             xmlFreeDoc(doc);
 101         } else
 102             g_message(_("Unable to find a valid menu file '%s'"),
 103                       (const gchar*)it->data);
 104     }
 105     if (!loaded) {
 106         if (parse_load_menu("menu.xml", &doc, &node)) {
 107             parse_tree(menu_parse_inst, doc, node->children);
 108             xmlFreeDoc(doc);
 109         } else
 110             g_message(_("Unable to find a valid menu file '%s'"),
 111                       "menu.xml");
 112     }
 113
 114     g_assert(menu_parse_state.parent == NULL);
 115
 116     if (!reconfig)
 117         client_add_destroy_notify(client_dest, NULL);
 118 }
 119
 120 void menu_shutdown(gboolean reconfig)
 121 {
 122     if (!reconfig)
 123         client_remove_destroy_notify(client_dest);
 124
 125     parse_shutdown(menu_parse_inst);
 126     menu_parse_inst = NULL;
 127
 128     client_list_menu_shutdown(reconfig);
 129     client_list_combined_menu_shutdown(reconfig);
 130
 131     menu_frame_hide_all();
 132     g_hash_table_destroy(menu_hash);
 133     menu_hash = NULL;
 134 }
 135
 136 static gboolean menu_pipe_submenu(gpointer key, gpointer val, gpointer data)
 137 {
 138     ObMenu *menu = val;
 139     return menu->pipe_creator != NULL;
 140 }
 141
 142 static void clear_cache(gpointer key, gpointer val, gpointer data)
 143 {
 144     ObMenu *menu = val;
 145     if (menu->execute)
 146         menu_clear_entries(menu);
 147 }
 148
 149 void menu_clear_pipe_caches()
 150 {
 151     /* delete any pipe menus' submenus */
 152     g_hash_table_foreach_remove(menu_hash, menu_pipe_submenu, NULL);
 153     /* empty the top level pipe menus */
 154     g_hash_table_foreach(menu_hash, clear_cache, NULL);
 155 }
 156
 157 void menu_pipe_execute(ObMenu *self)
 158 {
 159     xmlDocPtr doc;
 160     xmlNodePtr node;
 161     gchar *output;
 162     GError *err = NULL;
 163
 164     if (!self->execute)
 165         return;
 166     if (self->entries) /* the entries are already created and cached */
 167         return;
 168
 169     if (!g_spawn_command_line_sync(self->execute, &output, NULL, NULL, &err)) {
 170         g_message(_("Failed to execute command for pipe-menu '%s': %s"),
 171                   self->execute, err->message);
 172         g_error_free(err);
 173         return;
 174     }
 175
 176     if (parse_load_mem(output, strlen(output),
 177                        "openbox_pipe_menu", &doc, &node))
 178     {
 179         menu_parse_state.pipe_creator = self;
 180         menu_parse_state.parent = self;
 181         parse_tree(menu_parse_inst, doc, node->children);
 182         xmlFreeDoc(doc);
 183     } else {
 184         g_message(_("Invalid output from pipe-menu '%s'"), self->execute);
 185     }
 186
 187     g_free(output);
 188 }
 189
 190 static ObMenu* menu_from_name(gchar *name)
 191 {
 192     ObMenu *self = NULL;
 193
 194     g_assert(name != NULL);
 195
 196     if (!(self = g_hash_table_lookup(menu_hash, name)))
 197         g_message(_("Attempted to access menu '%s' but it does not exist"),
 198                   name);
 199     return self;
 200 }
 201
 202 #define VALID_SHORTCUT(c) (((c) >= '0' && (c) <= '9') || \
 203                            ((c) >= 'A' && (c) <= 'Z') || \
 204                            ((c) >= 'a' && (c) <= 'z'))
 205
 206 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
 207                                gchar **strippedlabel, guint *position)
 208 {
 209     gunichar shortcut = 0;
 210
 211     *position = 0;
 212
 213     g_assert(strippedlabel != NULL);
 214
 215     if (label == NULL) {
 216         *strippedlabel = NULL;
 217     } else {
 218         gchar *i;
 219
 220         *strippedlabel = g_strdup(label);
 221
 222         /* if allow_shortcut is false, then you can't use the &, instead you
 223            have to just use the first valid character
 224         */
 225
 226         i = strchr(*strippedlabel, '&');
 227         if (allow_shortcut && i != NULL) {
 228             /* there is an ampersand in the string */
 229
 230             /* you have to use a printable ascii character for shortcuts
 231                don't allow space either, so you can have like "a & b"
 232             */
 233             if (VALID_SHORTCUT(*(i+1))) {
 234                 shortcut = g_unichar_tolower(g_utf8_get_char(i+1));
 235                 *position = i - *strippedlabel;
 236
 237                 /* remove the & from the string */
 238                 for (; *i != '\0'; ++i)
 239                     *i = *(i+1);
 240             }
 241         } else {
 242             /* there is no ampersand, so find the first valid character to use
 243                instead */
 244
 245             for (i = *strippedlabel; *i != '\0'; ++i)
 246                 if (VALID_SHORTCUT(*i)) {
 247                     *position = i - *strippedlabel;
 248                     shortcut = g_unichar_tolower(g_utf8_get_char(i));
 249                     break;
 250                 }
 251         }
 252     }
 253     return shortcut;
 254 }
 255
 256 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 257                             gpointer data)
 258 {
 259     ObMenuParseState *state = data;
 260     gchar *label;
 261
 262     if (state->parent) {
 263         if (parse_attr_string("label", node, &label)) {
 264             GSList *acts = NULL;
 265
 266             for (node = node->children; node; node = node->next)
 267                 if (!xmlStrcasecmp(node->name, (const xmlChar*) "action")) {
 268                     ObActionsAct *a = actions_parse(i, doc, node);
 269                     if (a)
 270                         acts = g_slist_append(acts, a);
 271                 }
 272             menu_add_normal(state->parent, -1, label, acts, FALSE);
 273             g_free(label);
 274         }
 275     }
 276 }
 277
 278 static void parse_menu_separator(ObParseInst *i,
 279                                  xmlDocPtr doc, xmlNodePtr node,
 280                                  gpointer data)
 281 {
 282     ObMenuParseState *state = data;
 283
 284     if (state->parent) {
 285         gchar *label;
 286
 287         if (!parse_attr_string("label", node, &label))
 288             label = NULL;
 289
 290         menu_add_separator(state->parent, -1, label);
 291         g_free(label);
 292     }
 293 }
 294
 295 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 296                        gpointer data)
 297 {
 298     ObMenuParseState *state = data;
 299     gchar *name = NULL, *title = NULL, *script = NULL;
 300     ObMenu *menu;
 301
 302     if (!parse_attr_string("id", node, &name))
 303         goto parse_menu_fail;
 304
 305     if (!g_hash_table_lookup(menu_hash, name)) {
 306         if (!parse_attr_string("label", node, &title))
 307             goto parse_menu_fail;
 308
 309         if ((menu = menu_new(name, title, FALSE, NULL))) {
 310             menu->pipe_creator = state->pipe_creator;
 311             if (parse_attr_string("execute", node, &script)) {
 312                 menu->execute = parse_expand_tilde(script);
 313             } else {
 314                 ObMenu *old;
 315
 316                 old = state->parent;
 317                 state->parent = menu;
 318                 parse_tree(i, doc, node->children);
 319                 state->parent = old;
 320             }
 321         }
 322     }
 323
 324     if (state->parent)
 325         menu_add_submenu(state->parent, -1, name);
 326
 327 parse_menu_fail:
 328     g_free(name);
 329     g_free(title);
 330     g_free(script);
 331 }
 332
 333 ObMenu* menu_new(const gchar *name, const gchar *title,
 334                  gboolean allow_shortcut_selection, gpointer data)
 335 {
 336     ObMenu *self;
 337
 338     self = g_new0(ObMenu, 1);
 339     self->name = g_strdup(name);
 340     self->data = data;
 341
 342     self->shortcut = parse_shortcut(title, allow_shortcut_selection,
 343                                     &self->title, &self->shortcut_position);
 344
 345     g_hash_table_replace(menu_hash, self->name, self);
 346
 347     /* Each menu has a single more_menu.  When the menu spills past what
 348        can fit on the screen, a new menu frame entry is created from this
 349        more_menu, and a new menu frame for the submenu is created for this
 350        menu, also pointing to the more_menu.
 351
 352        This can be done multiple times using the same more_menu.
 353
 354        more_menu->more_menu will always be NULL, since there is only 1 for
 355        each menu. */
 356     self->more_menu = g_new0(ObMenu, 1);
 357     self->more_menu->name = _("More...");
 358     self->more_menu->title = _("More...");
 359     self->more_menu->data = data;
 360     self->more_menu->shortcut = g_unichar_tolower(g_utf8_get_char("M"));
 361
 362     self->more_menu->show_func = self->show_func;
 363     self->more_menu->hide_func = self->hide_func;
 364     self->more_menu->update_func = self->update_func;
 365     self->more_menu->execute_func = self->execute_func;
 366     self->more_menu->destroy_func = self->destroy_func;
 367     self->more_menu->place_func = self->place_func;
 368
 369     return self;
 370 }
 371
 372 static void menu_destroy_hash_value(ObMenu *self)
 373 {
 374     /* make sure its not visible */
 375     {
 376         GList *it;
 377         ObMenuFrame *f;
 378
 379         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 380             f = it->data;
 381             if (f->menu == self)
 382                 menu_frame_hide_all();
 383         }
 384     }
 385
 386     if (self->destroy_func)
 387         self->destroy_func(self, self->data);
 388
 389     menu_clear_entries(self);
 390     g_free(self->name);
 391     g_free(self->title);
 392     g_free(self->execute);
 393     g_free(self->more_menu);
 394
 395     g_free(self);
 396 }
 397
 398 void menu_free(ObMenu *menu)
 399 {
 400     if (menu)
 401         g_hash_table_remove(menu_hash, menu->name);
 402 }
 403
 404 static gboolean menu_hide_delay_func(gpointer data)
 405 {
 406     menu_can_hide = TRUE;
 407     return FALSE; /* no repeat */
 408 }
 409
 410 void menu_show(gchar *name, gint x, gint y, gint button, ObClient *client)
 411 {
 412     ObMenu *self;
 413     ObMenuFrame *frame;
 414
 415     if (!(self = menu_from_name(name)) ||
 416         grab_on_keyboard() || grab_on_pointer()) return;
 417
 418     /* if the requested menu is already the top visible menu, then don't
 419        bother */
 420     if (menu_frame_visible) {
 421         frame = menu_frame_visible->data;
 422         if (frame->menu == self)
 423             return;
 424     }
 425
 426     menu_frame_hide_all();
 427
 428     /* clear the pipe menus when showing a new menu */
 429     menu_clear_pipe_caches();
 430
 431     frame = menu_frame_new(self, 0, client);
 432     if (!menu_frame_show_topmenu(frame, x, y, button))
 433         menu_frame_free(frame);
 434     else {
 435         if (!button) {
 436             /* select the first entry if it's not a submenu and we opened
 437              * the menu with the keyboard, and skip all headers */
 438             GList *it = frame->entries;
 439             while (it) {
 440                 ObMenuEntryFrame *e = it->data;
 441                 if (e->entry->type == OB_MENU_ENTRY_TYPE_NORMAL) {
 442                     menu_frame_select(frame, e, FALSE);
 443                     break;
 444                 } else if (e->entry->type == OB_MENU_ENTRY_TYPE_SEPARATOR)
 445                     it = g_list_next(it);
 446                 else
 447                     break;
 448             }
 449         }
 450
 451         /* reset the hide timer */
 452         if (!button)
 453             menu_can_hide = TRUE;
 454         else {
 455             menu_can_hide = FALSE;
 456             ob_main_loop_timeout_add(ob_main_loop,
 457                                      config_menu_hide_delay * 1000,
 458                                      menu_hide_delay_func,
 459                                      NULL, g_direct_equal, NULL);
 460         }
 461     }
 462 }
 463
 464 gboolean menu_hide_delay_reached()
 465 {
 466     return menu_can_hide;
 467 }
 468
 469 static ObMenuEntry* menu_entry_new(ObMenu *menu, ObMenuEntryType type, gint id)
 470 {
 471     ObMenuEntry *self;
 472
 473     g_assert(menu);
 474
 475     self = g_new0(ObMenuEntry, 1);
 476     self->ref = 1;
 477     self->type = type;
 478     self->menu = menu;
 479     self->id = id;
 480
 481     switch (type) {
 482     case OB_MENU_ENTRY_TYPE_NORMAL:
 483         self->data.normal.enabled = TRUE;
 484         break;
 485     case OB_MENU_ENTRY_TYPE_SUBMENU:
 486     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 487         break;
 488     }
 489
 490     return self;
 491 }
 492
 493 void menu_entry_ref(ObMenuEntry *self)
 494 {
 495     ++self->ref;
 496 }
 497
 498 void menu_entry_unref(ObMenuEntry *self)
 499 {
 500     if (self && --self->ref == 0) {
 501         switch (self->type) {
 502         case OB_MENU_ENTRY_TYPE_NORMAL:
 503             g_free(self->data.normal.label);
 504             while (self->data.normal.actions) {
 505                 actions_act_unref(self->data.normal.actions->data);
 506                 self->data.normal.actions =
 507                     g_slist_delete_link(self->data.normal.actions,
 508                                         self->data.normal.actions);
 509             }
 510             break;
 511         case OB_MENU_ENTRY_TYPE_SUBMENU:
 512             g_free(self->data.submenu.name);
 513             break;
 514         case OB_MENU_ENTRY_TYPE_SEPARATOR:
 515             break;
 516         }
 517
 518         g_free(self);
 519     }
 520 }
 521
 522 void menu_clear_entries(ObMenu *self)
 523 {
 524 #ifdef DEBUG
 525     /* assert that the menu isn't visible */
 526     {
 527         GList *it;
 528         ObMenuFrame *f;
 529
 530         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 531             f = it->data;
 532             g_assert(f->menu != self);
 533         }
 534     }
 535 #endif
 536
 537     while (self->entries) {
 538         menu_entry_unref(self->entries->data);
 539         self->entries = g_list_delete_link(self->entries, self->entries);
 540     }
 541     self->more_menu->entries = self->entries; /* keep it in sync */
 542 }
 543
 544 void menu_entry_remove(ObMenuEntry *self)
 545 {
 546     self->menu->entries = g_list_remove(self->menu->entries, self);
 547     menu_entry_unref(self);
 548 }
 549
 550 ObMenuEntry* menu_add_normal(ObMenu *self, gint id, const gchar *label,
 551                              GSList *actions, gboolean allow_shortcut)
 552 {
 553     ObMenuEntry *e;
 554
 555     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_NORMAL, id);
 556     e->data.normal.actions = actions;
 557
 558     menu_entry_set_label(e, label, allow_shortcut);
 559
 560     self->entries = g_list_append(self->entries, e);
 561     self->more_menu->entries = self->entries; /* keep it in sync */
 562     return e;
 563 }
 564
 565 ObMenuEntry* menu_get_more(ObMenu *self, guint show_from)
 566 {
 567     ObMenuEntry *e;
 568     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, -1);
 569     /* points to itself */
 570     e->data.submenu.name = g_strdup(self->name);
 571     e->data.submenu.submenu = self;
 572     e->data.submenu.show_from = show_from;
 573     return e;
 574 }
 575
 576 ObMenuEntry* menu_add_submenu(ObMenu *self, gint id, const gchar *submenu)
 577 {
 578     ObMenuEntry *e;
 579
 580     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, id);
 581     e->data.submenu.name = g_strdup(submenu);
 582
 583     self->entries = g_list_append(self->entries, e);
 584     self->more_menu->entries = self->entries; /* keep it in sync */
 585     return e;
 586 }
 587
 588 ObMenuEntry* menu_add_separator(ObMenu *self, gint id, const gchar *label)
 589 {
 590     ObMenuEntry *e;
 591
 592     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SEPARATOR, id);
 593
 594     menu_entry_set_label(e, label, FALSE);
 595
 596     self->entries = g_list_append(self->entries, e);
 597     self->more_menu->entries = self->entries; /* keep it in sync */
 598     return e;
 599 }
 600
 601 void menu_set_show_func(ObMenu *self, ObMenuShowFunc func)
 602 {
 603     self->show_func = func;
 604     self->more_menu->show_func = func; /* keep it in sync */
 605 }
 606
 607 void menu_set_hide_func(ObMenu *self, ObMenuHideFunc func)
 608 {
 609     self->hide_func = func;
 610     self->more_menu->hide_func = func; /* keep it in sync */
 611 }
 612
 613 void menu_set_update_func(ObMenu *self, ObMenuUpdateFunc func)
 614 {
 615     self->update_func = func;
 616     self->more_menu->update_func = func; /* keep it in sync */
 617 }
 618
 619 void menu_set_execute_func(ObMenu *self, ObMenuExecuteFunc func)
 620 {
 621     self->execute_func = func;
 622     self->more_menu->execute_func = func; /* keep it in sync */
 623 }
 624
 625 void menu_set_destroy_func(ObMenu *self, ObMenuDestroyFunc func)
 626 {
 627     self->destroy_func = func;
 628     self->more_menu->destroy_func = func; /* keep it in sync */
 629 }
 630
 631 void menu_set_place_func(ObMenu *self, ObMenuPlaceFunc func)
 632 {
 633     self->place_func = func;
 634     self->more_menu->place_func = func; /* keep it in sync */
 635 }
 636
 637 ObMenuEntry* menu_find_entry_id(ObMenu *self, gint id)
 638 {
 639     ObMenuEntry *ret = NULL;
 640     GList *it;
 641
 642     for (it = self->entries; it; it = g_list_next(it)) {
 643         ObMenuEntry *e = it->data;
 644
 645         if (e->id == id) {
 646             ret = e;
 647             break;
 648         }
 649     }
 650     return ret;
 651 }
 652
 653 void menu_find_submenus(ObMenu *self)
 654 {
 655     GList *it;
 656
 657     for (it = self->entries; it; it = g_list_next(it)) {
 658         ObMenuEntry *e = it->data;
 659
 660         if (e->type == OB_MENU_ENTRY_TYPE_SUBMENU)
 661             e->data.submenu.submenu = menu_from_name(e->data.submenu.name);
 662     }
 663 }
 664
 665 void menu_entry_set_label(ObMenuEntry *self, const gchar *label,
 666                           gboolean allow_shortcut)
 667 {
 668     switch (self->type) {
 669     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 670         g_free(self->data.separator.label);
 671         self->data.separator.label = g_strdup(label);
 672         break;
 673     case OB_MENU_ENTRY_TYPE_NORMAL:
 674         g_free(self->data.normal.label);
 675         self->data.normal.shortcut =
 676             parse_shortcut(label, allow_shortcut, &self->data.normal.label,
 677                            &self->data.normal.shortcut_position);
 678         break;
 679     default:
 680         g_assert_not_reached();
 681     }
 682 }
 683
 684 void menu_show_all_shortcuts(ObMenu *self, gboolean show)
 685 {
 686     self->show_all_shortcuts = show;
 687 }