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                                gboolean *always_show);
  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(void)
 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                                gboolean *always_show)
 209 {
 210     gunichar shortcut = 0;
 211
 212     *position = 0;
 213     *always_show = FALSE;
 214
 215     g_assert(strippedlabel != NULL);
 216
 217     if (label == NULL) {
 218         *strippedlabel = NULL;
 219     } else {
 220         gchar *i;
 221
 222         *strippedlabel = g_strdup(label);
 223
 224         /* if allow_shortcut is false, then you can't use the '_', instead you
 225            have to just use the first valid character
 226         */
 227
 228         i = strchr(*strippedlabel, '_');
 229         if (allow_shortcut && i != NULL) {
 230             /* there is an underscore in the string */
 231
 232             /* you have to use a printable ascii character for shortcuts
 233                don't allow space either, so you can have like "a _ b"
 234             */
 235             if (VALID_SHORTCUT(*(i+1)) || *(i+1) == '_') {
 236                 /* Allow you to escape the first _ by putting __ */
 237                 if (*(i+1) != '_') {
 238                     shortcut = g_unichar_tolower(g_utf8_get_char(i+1));
 239                     *position = i - *strippedlabel;
 240                     *always_show = TRUE;
 241                 }
 242
 243                 /* remove the '_' from the string */
 244                 for (; *i != '\0'; ++i)
 245                     *i = *(i+1);
 246             } else if (*(i+1) == '\0') {
 247                 /* no default shortcut if the '_' is the last character
 248                    (eg. "Exit_") for menu entries that you don't want
 249                    to be executed by mistake
 250                 */
 251                     *i = '\0';
 252             }
 253         } else {
 254             /* there is no underscore, so find the first valid character to use
 255                instead */
 256
 257             for (i = *strippedlabel; *i != '\0'; ++i)
 258                 if (VALID_SHORTCUT(*i)) {
 259                     *position = i - *strippedlabel;
 260                     shortcut = g_unichar_tolower(g_utf8_get_char(i));
 261                     break;
 262                 }
 263         }
 264     }
 265     return shortcut;
 266 }
 267
 268 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 269                             gpointer data)
 270 {
 271     ObMenuParseState *state = data;
 272     gchar *label;
 273
 274     if (state->parent) {
 275         if (parse_attr_string("label", node, &label)) {
 276             GSList *acts = NULL;
 277
 278             for (node = node->children; node; node = node->next)
 279                 if (!xmlStrcasecmp(node->name, (const xmlChar*) "action")) {
 280                     ObActionsAct *a = actions_parse(i, doc, node);
 281                     if (a)
 282                         acts = g_slist_append(acts, a);
 283                 }
 284             menu_add_normal(state->parent, -1, label, acts, TRUE);
 285             g_free(label);
 286         }
 287     }
 288 }
 289
 290 static void parse_menu_separator(ObParseInst *i,
 291                                  xmlDocPtr doc, xmlNodePtr node,
 292                                  gpointer data)
 293 {
 294     ObMenuParseState *state = data;
 295
 296     if (state->parent) {
 297         gchar *label;
 298
 299         if (!parse_attr_string("label", node, &label))
 300             label = NULL;
 301
 302         menu_add_separator(state->parent, -1, label);
 303         g_free(label);
 304     }
 305 }
 306
 307 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
 308                        gpointer data)
 309 {
 310     ObMenuParseState *state = data;
 311     gchar *name = NULL, *title = NULL, *script = NULL;
 312     ObMenu *menu;
 313
 314     if (!parse_attr_string("id", node, &name))
 315         goto parse_menu_fail;
 316
 317     if (!g_hash_table_lookup(menu_hash, name)) {
 318         if (!parse_attr_string("label", node, &title))
 319             goto parse_menu_fail;
 320
 321         if ((menu = menu_new(name, title, TRUE, NULL))) {
 322             menu->pipe_creator = state->pipe_creator;
 323             if (parse_attr_string("execute", node, &script)) {
 324                 menu->execute = parse_expand_tilde(script);
 325             } else {
 326                 ObMenu *old;
 327
 328                 old = state->parent;
 329                 state->parent = menu;
 330                 parse_tree(i, doc, node->children);
 331                 state->parent = old;
 332             }
 333         }
 334     }
 335
 336     if (state->parent)
 337         menu_add_submenu(state->parent, -1, name);
 338
 339 parse_menu_fail:
 340     g_free(name);
 341     g_free(title);
 342     g_free(script);
 343 }
 344
 345 ObMenu* menu_new(const gchar *name, const gchar *title,
 346                  gboolean allow_shortcut_selection, gpointer data)
 347 {
 348     ObMenu *self;
 349
 350     self = g_new0(ObMenu, 1);
 351     self->name = g_strdup(name);
 352     self->data = data;
 353
 354     self->shortcut = parse_shortcut(title, allow_shortcut_selection,
 355                                     &self->title, &self->shortcut_position,
 356                                     &self->shortcut_always_show);
 357
 358     g_hash_table_replace(menu_hash, self->name, self);
 359
 360     /* Each menu has a single more_menu.  When the menu spills past what
 361        can fit on the screen, a new menu frame entry is created from this
 362        more_menu, and a new menu frame for the submenu is created for this
 363        menu, also pointing to the more_menu.
 364
 365        This can be done multiple times using the same more_menu.
 366
 367        more_menu->more_menu will always be NULL, since there is only 1 for
 368        each menu. */
 369     self->more_menu = g_new0(ObMenu, 1);
 370     self->more_menu->name = _("More...");
 371     self->more_menu->title = _("More...");
 372     self->more_menu->data = data;
 373     self->more_menu->shortcut = g_unichar_tolower(g_utf8_get_char("M"));
 374
 375     return self;
 376 }
 377
 378 static void menu_destroy_hash_value(ObMenu *self)
 379 {
 380     /* make sure its not visible */
 381     {
 382         GList *it;
 383         ObMenuFrame *f;
 384
 385         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 386             f = it->data;
 387             if (f->menu == self)
 388                 menu_frame_hide_all();
 389         }
 390     }
 391
 392     if (self->destroy_func)
 393         self->destroy_func(self, self->data);
 394
 395     menu_clear_entries(self);
 396     g_free(self->name);
 397     g_free(self->title);
 398     g_free(self->execute);
 399     g_free(self->more_menu);
 400
 401     g_free(self);
 402 }
 403
 404 void menu_free(ObMenu *menu)
 405 {
 406     if (menu)
 407         g_hash_table_remove(menu_hash, menu->name);
 408 }
 409
 410 static gboolean menu_hide_delay_func(gpointer data)
 411 {
 412     menu_can_hide = TRUE;
 413     return FALSE; /* no repeat */
 414 }
 415
 416 void menu_show(gchar *name, gint x, gint y, gboolean mouse, ObClient *client)
 417 {
 418     ObMenu *self;
 419     ObMenuFrame *frame;
 420
 421     if (!(self = menu_from_name(name)) ||
 422         grab_on_keyboard() || grab_on_pointer()) return;
 423
 424     /* if the requested menu is already the top visible menu, then don't
 425        bother */
 426     if (menu_frame_visible) {
 427         frame = menu_frame_visible->data;
 428         if (frame->menu == self)
 429             return;
 430     }
 431
 432     menu_frame_hide_all();
 433
 434     /* clear the pipe menus when showing a new menu */
 435     menu_clear_pipe_caches();
 436
 437     frame = menu_frame_new(self, 0, client);
 438     if (!menu_frame_show_topmenu(frame, x, y, mouse))
 439         menu_frame_free(frame);
 440     else {
 441         if (!mouse) {
 442             /* select the first entry if it's not a submenu and we opened
 443              * the menu with the keyboard, and skip all headers */
 444             GList *it = frame->entries;
 445             while (it) {
 446                 ObMenuEntryFrame *e = it->data;
 447                 if (e->entry->type == OB_MENU_ENTRY_TYPE_NORMAL) {
 448                     menu_frame_select(frame, e, FALSE);
 449                     break;
 450                 } else if (e->entry->type == OB_MENU_ENTRY_TYPE_SEPARATOR)
 451                     it = g_list_next(it);
 452                 else
 453                     break;
 454             }
 455         }
 456
 457         /* reset the hide timer */
 458         if (!mouse)
 459             menu_can_hide = TRUE;
 460         else {
 461             menu_can_hide = FALSE;
 462             ob_main_loop_timeout_add(ob_main_loop,
 463                                      config_menu_hide_delay * 1000,
 464                                      menu_hide_delay_func,
 465                                      NULL, g_direct_equal, NULL);
 466         }
 467     }
 468 }
 469
 470 gboolean menu_hide_delay_reached(void)
 471 {
 472     return menu_can_hide;
 473 }
 474
 475 static ObMenuEntry* menu_entry_new(ObMenu *menu, ObMenuEntryType type, gint id)
 476 {
 477     ObMenuEntry *self;
 478
 479     g_assert(menu);
 480
 481     self = g_new0(ObMenuEntry, 1);
 482     self->ref = 1;
 483     self->type = type;
 484     self->menu = menu;
 485     self->id = id;
 486
 487     switch (type) {
 488     case OB_MENU_ENTRY_TYPE_NORMAL:
 489         self->data.normal.enabled = TRUE;
 490         break;
 491     case OB_MENU_ENTRY_TYPE_SUBMENU:
 492     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 493         break;
 494     }
 495
 496     return self;
 497 }
 498
 499 void menu_entry_ref(ObMenuEntry *self)
 500 {
 501     ++self->ref;
 502 }
 503
 504 void menu_entry_unref(ObMenuEntry *self)
 505 {
 506     if (self && --self->ref == 0) {
 507         switch (self->type) {
 508         case OB_MENU_ENTRY_TYPE_NORMAL:
 509             RrImageUnref(self->data.normal.icon);
 510             g_free(self->data.normal.label);
 511             while (self->data.normal.actions) {
 512                 actions_act_unref(self->data.normal.actions->data);
 513                 self->data.normal.actions =
 514                     g_slist_delete_link(self->data.normal.actions,
 515                                         self->data.normal.actions);
 516             }
 517             break;
 518         case OB_MENU_ENTRY_TYPE_SUBMENU:
 519             g_free(self->data.submenu.name);
 520             break;
 521         case OB_MENU_ENTRY_TYPE_SEPARATOR:
 522             g_free(self->data.separator.label);
 523             break;
 524         }
 525
 526         g_free(self);
 527     }
 528 }
 529
 530 void menu_clear_entries(ObMenu *self)
 531 {
 532 #ifdef DEBUG
 533     /* assert that the menu isn't visible */
 534     {
 535         GList *it;
 536         ObMenuFrame *f;
 537
 538         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 539             f = it->data;
 540             g_assert(f->menu != self);
 541         }
 542     }
 543 #endif
 544
 545     while (self->entries) {
 546         menu_entry_unref(self->entries->data);
 547         self->entries = g_list_delete_link(self->entries, self->entries);
 548     }
 549     self->more_menu->entries = self->entries; /* keep it in sync */
 550 }
 551
 552 void menu_entry_remove(ObMenuEntry *self)
 553 {
 554     self->menu->entries = g_list_remove(self->menu->entries, self);
 555     menu_entry_unref(self);
 556 }
 557
 558 ObMenuEntry* menu_add_normal(ObMenu *self, gint id, const gchar *label,
 559                              GSList *actions, gboolean allow_shortcut)
 560 {
 561     ObMenuEntry *e;
 562
 563     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_NORMAL, id);
 564     e->data.normal.actions = actions;
 565
 566     menu_entry_set_label(e, label, allow_shortcut);
 567
 568     self->entries = g_list_append(self->entries, e);
 569     self->more_menu->entries = self->entries; /* keep it in sync */
 570     return e;
 571 }
 572
 573 ObMenuEntry* menu_get_more(ObMenu *self, guint show_from)
 574 {
 575     ObMenuEntry *e;
 576     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, -1);
 577     /* points to itself */
 578     e->data.submenu.name = g_strdup(self->name);
 579     e->data.submenu.submenu = self;
 580     e->data.submenu.show_from = show_from;
 581     return e;
 582 }
 583
 584 ObMenuEntry* menu_add_submenu(ObMenu *self, gint id, const gchar *submenu)
 585 {
 586     ObMenuEntry *e;
 587
 588     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, id);
 589     e->data.submenu.name = g_strdup(submenu);
 590
 591     self->entries = g_list_append(self->entries, e);
 592     self->more_menu->entries = self->entries; /* keep it in sync */
 593     return e;
 594 }
 595
 596 ObMenuEntry* menu_add_separator(ObMenu *self, gint id, const gchar *label)
 597 {
 598     ObMenuEntry *e;
 599
 600     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SEPARATOR, id);
 601
 602     menu_entry_set_label(e, label, FALSE);
 603
 604     self->entries = g_list_append(self->entries, e);
 605     self->more_menu->entries = self->entries; /* keep it in sync */
 606     return e;
 607 }
 608
 609 void menu_set_show_func(ObMenu *self, ObMenuShowFunc func)
 610 {
 611     self->show_func = func;
 612 }
 613
 614 void menu_set_hide_func(ObMenu *self, ObMenuHideFunc func)
 615 {
 616     self->hide_func = func;
 617 }
 618
 619 void menu_set_update_func(ObMenu *self, ObMenuUpdateFunc func)
 620 {
 621     self->update_func = func;
 622 }
 623
 624 void menu_set_execute_func(ObMenu *self, ObMenuExecuteFunc func)
 625 {
 626     self->execute_func = func;
 627     self->more_menu->execute_func = func; /* keep it in sync */
 628 }
 629
 630 void menu_set_destroy_func(ObMenu *self, ObMenuDestroyFunc func)
 631 {
 632     self->destroy_func = func;
 633 }
 634
 635 void menu_set_place_func(ObMenu *self, ObMenuPlaceFunc func)
 636 {
 637     self->place_func = func;
 638 }
 639
 640 ObMenuEntry* menu_find_entry_id(ObMenu *self, gint id)
 641 {
 642     ObMenuEntry *ret = NULL;
 643     GList *it;
 644
 645     for (it = self->entries; it; it = g_list_next(it)) {
 646         ObMenuEntry *e = it->data;
 647
 648         if (e->id == id) {
 649             ret = e;
 650             break;
 651         }
 652     }
 653     return ret;
 654 }
 655
 656 void menu_find_submenus(ObMenu *self)
 657 {
 658     GList *it;
 659
 660     for (it = self->entries; it; it = g_list_next(it)) {
 661         ObMenuEntry *e = it->data;
 662
 663         if (e->type == OB_MENU_ENTRY_TYPE_SUBMENU)
 664             e->data.submenu.submenu = menu_from_name(e->data.submenu.name);
 665     }
 666 }
 667
 668 void menu_entry_set_label(ObMenuEntry *self, const gchar *label,
 669                           gboolean allow_shortcut)
 670 {
 671     switch (self->type) {
 672     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 673         g_free(self->data.separator.label);
 674         self->data.separator.label = g_strdup(label);
 675         break;
 676     case OB_MENU_ENTRY_TYPE_NORMAL:
 677         g_free(self->data.normal.label);
 678         self->data.normal.shortcut =
 679             parse_shortcut(label, allow_shortcut, &self->data.normal.label,
 680                            &self->data.normal.shortcut_position,
 681                            &self->data.normal.shortcut_always_show);
 682         break;
 683     default:
 684         g_assert_not_reached();
 685     }
 686 }
 687
 688 void menu_show_all_shortcuts(ObMenu *self, gboolean show)
 689 {
 690     self->show_all_shortcuts = show;
 691 }