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