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 "stacking.h"
  24 #include "grab.h"
  25 #include "client.h"
  26 #include "config.h"
  27 #include "actions.h"
  28 #include "screen.h"
  29 #include "menuframe.h"
  30 #include "keyboard.h"
  31 #include "geom.h"
  32 #include "misc.h"
  33 #include "client_menu.h"
  34 #include "client_list_menu.h"
  35 #include "client_list_combined_menu.h"
  36 #include "gettext.h"
  37 #include "parser/parse.h"
  38
  39 typedef struct _ObMenuParseState ObMenuParseState;
  40
  41 struct _ObMenuParseState
  42 {
  43     ObMenu *parent;
  44     ObMenu *pipe_creator;
  45 };
  46
  47 static GHashTable *menu_hash = NULL;
  48 static ObParseInst *menu_parse_inst;
  49 static ObMenuParseState menu_parse_state;
  50 static gboolean menu_can_hide = FALSE;
  51
  52 static void menu_destroy_hash_value(ObMenu *self);
  53 static void parse_menu_item(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  54                             gpointer data);
  55 static void parse_menu_separator(ObParseInst *i,
  56                                  xmlDocPtr doc, xmlNodePtr node,
  57                                  gpointer data);
  58 static void parse_menu(ObParseInst *i, xmlDocPtr doc, xmlNodePtr node,
  59                        gpointer data);
  60 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
  61                                gchar **strippedlabel, guint *position,
  62                                gboolean *always_show);
  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(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             obt_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             g_free(self->data.normal.label);
 507             while (self->data.normal.actions) {
 508                 actions_act_unref(self->data.normal.actions->data);
 509                 self->data.normal.actions =
 510                     g_slist_delete_link(self->data.normal.actions,
 511                                         self->data.normal.actions);
 512             }
 513             break;
 514         case OB_MENU_ENTRY_TYPE_SUBMENU:
 515             g_free(self->data.submenu.name);
 516             break;
 517         case OB_MENU_ENTRY_TYPE_SEPARATOR:
 518             g_free(self->data.separator.label);
 519             break;
 520         }
 521
 522         g_free(self);
 523     }
 524 }
 525
 526 void menu_clear_entries(ObMenu *self)
 527 {
 528 #ifdef DEBUG
 529     /* assert that the menu isn't visible */
 530     {
 531         GList *it;
 532         ObMenuFrame *f;
 533
 534         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 535             f = it->data;
 536             g_assert(f->menu != self);
 537         }
 538     }
 539 #endif
 540
 541     while (self->entries) {
 542         menu_entry_unref(self->entries->data);
 543         self->entries = g_list_delete_link(self->entries, self->entries);
 544     }
 545     self->more_menu->entries = self->entries; /* keep it in sync */
 546 }
 547
 548 void menu_entry_remove(ObMenuEntry *self)
 549 {
 550     self->menu->entries = g_list_remove(self->menu->entries, self);
 551     menu_entry_unref(self);
 552 }
 553
 554 ObMenuEntry* menu_add_normal(ObMenu *self, gint id, const gchar *label,
 555                              GSList *actions, gboolean allow_shortcut)
 556 {
 557     ObMenuEntry *e;
 558
 559     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_NORMAL, id);
 560     e->data.normal.actions = actions;
 561
 562     menu_entry_set_label(e, label, allow_shortcut);
 563
 564     self->entries = g_list_append(self->entries, e);
 565     self->more_menu->entries = self->entries; /* keep it in sync */
 566     return e;
 567 }
 568
 569 ObMenuEntry* menu_get_more(ObMenu *self, guint show_from)
 570 {
 571     ObMenuEntry *e;
 572     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, -1);
 573     /* points to itself */
 574     e->data.submenu.name = g_strdup(self->name);
 575     e->data.submenu.submenu = self;
 576     e->data.submenu.show_from = show_from;
 577     return e;
 578 }
 579
 580 ObMenuEntry* menu_add_submenu(ObMenu *self, gint id, const gchar *submenu)
 581 {
 582     ObMenuEntry *e;
 583
 584     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, id);
 585     e->data.submenu.name = g_strdup(submenu);
 586
 587     self->entries = g_list_append(self->entries, e);
 588     self->more_menu->entries = self->entries; /* keep it in sync */
 589     return e;
 590 }
 591
 592 ObMenuEntry* menu_add_separator(ObMenu *self, gint id, const gchar *label)
 593 {
 594     ObMenuEntry *e;
 595
 596     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SEPARATOR, id);
 597
 598     menu_entry_set_label(e, label, FALSE);
 599
 600     self->entries = g_list_append(self->entries, e);
 601     self->more_menu->entries = self->entries; /* keep it in sync */
 602     return e;
 603 }
 604
 605 void menu_set_show_func(ObMenu *self, ObMenuShowFunc func)
 606 {
 607     self->show_func = func;
 608 }
 609
 610 void menu_set_hide_func(ObMenu *self, ObMenuHideFunc func)
 611 {
 612     self->hide_func = func;
 613 }
 614
 615 void menu_set_update_func(ObMenu *self, ObMenuUpdateFunc func)
 616 {
 617     self->update_func = func;
 618 }
 619
 620 void menu_set_execute_func(ObMenu *self, ObMenuExecuteFunc func)
 621 {
 622     self->execute_func = func;
 623     self->more_menu->execute_func = func; /* keep it in sync */
 624 }
 625
 626 void menu_set_destroy_func(ObMenu *self, ObMenuDestroyFunc func)
 627 {
 628     self->destroy_func = func;
 629 }
 630
 631 void menu_set_place_func(ObMenu *self, ObMenuPlaceFunc func)
 632 {
 633     self->place_func = func;
 634 }
 635
 636 ObMenuEntry* menu_find_entry_id(ObMenu *self, gint id)
 637 {
 638     ObMenuEntry *ret = NULL;
 639     GList *it;
 640
 641     for (it = self->entries; it; it = g_list_next(it)) {
 642         ObMenuEntry *e = it->data;
 643
 644         if (e->id == id) {
 645             ret = e;
 646             break;
 647         }
 648     }
 649     return ret;
 650 }
 651
 652 void menu_find_submenus(ObMenu *self)
 653 {
 654     GList *it;
 655
 656     for (it = self->entries; it; it = g_list_next(it)) {
 657         ObMenuEntry *e = it->data;
 658
 659         if (e->type == OB_MENU_ENTRY_TYPE_SUBMENU)
 660             e->data.submenu.submenu = menu_from_name(e->data.submenu.name);
 661     }
 662 }
 663
 664 void menu_entry_set_label(ObMenuEntry *self, const gchar *label,
 665                           gboolean allow_shortcut)
 666 {
 667     switch (self->type) {
 668     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 669         g_free(self->data.separator.label);
 670         self->data.separator.label = g_strdup(label);
 671         break;
 672     case OB_MENU_ENTRY_TYPE_NORMAL:
 673         g_free(self->data.normal.label);
 674         self->data.normal.shortcut =
 675             parse_shortcut(label, allow_shortcut, &self->data.normal.label,
 676                            &self->data.normal.shortcut_position,
 677                            &self->data.normal.shortcut_always_show);
 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 }