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 "obt/xml.h"
  38 #include "obt/paths.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 ObtXmlInst *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(xmlNodePtr node, gpointer data);
  55 static void parse_menu_separator(xmlNodePtr node, gpointer data);
  56 static void parse_menu(xmlNodePtr node, gpointer data);
  57 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
  58                                gchar **strippedlabel, guint *position,
  59                                gboolean *always_show);
  60
  61 void menu_startup(gboolean reconfig)
  62 {
  63     gboolean loaded = FALSE;
  64     GSList *it;
  65
  66     menu_hash = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
  67                                       (GDestroyNotify)menu_destroy_hash_value);
  68
  69     client_list_menu_startup(reconfig);
  70     client_list_combined_menu_startup(reconfig);
  71     client_menu_startup();
  72
  73     menu_parse_inst = obt_xml_instance_new();
  74
  75     menu_parse_state.parent = NULL;
  76     menu_parse_state.pipe_creator = NULL;
  77     obt_xml_register(menu_parse_inst, "menu", parse_menu, &menu_parse_state);
  78     obt_xml_register(menu_parse_inst, "item", parse_menu_item,
  79                      &menu_parse_state);
  80     obt_xml_register(menu_parse_inst, "separator",
  81                        parse_menu_separator, &menu_parse_state);
  82
  83     for (it = config_menu_files; it; it = g_slist_next(it)) {
  84         if (obt_xml_load_config_file(menu_parse_inst,
  85                                      "openbox",
  86                                      it->data,
  87                                      "openbox_menu"))
  88         {
  89             loaded = TRUE;
  90             obt_xml_tree_from_root(menu_parse_inst);
  91             obt_xml_close(menu_parse_inst);
  92         } else
  93             g_message(_("Unable to find a valid menu file \"%s\""),
  94                       (const gchar*)it->data);
  95     }
  96     if (!loaded) {
  97         if (obt_xml_load_config_file(menu_parse_inst,
  98                                      "openbox",
  99                                      "menu.xml",
 100                                      "openbox_menu"))
 101         {
 102             obt_xml_tree_from_root(menu_parse_inst);
 103             obt_xml_close(menu_parse_inst);
 104         } else
 105             g_message(_("Unable to find a valid menu file \"%s\""),
 106                       "menu.xml");
 107     }
 108
 109     g_assert(menu_parse_state.parent == NULL);
 110 }
 111
 112 void menu_shutdown(gboolean reconfig)
 113 {
 114     obt_xml_instance_unref(menu_parse_inst);
 115     menu_parse_inst = NULL;
 116
 117     client_list_menu_shutdown(reconfig);
 118     client_list_combined_menu_shutdown(reconfig);
 119
 120     menu_frame_hide_all();
 121     g_hash_table_destroy(menu_hash);
 122     menu_hash = NULL;
 123 }
 124
 125 static gboolean menu_pipe_submenu(gpointer key, gpointer val, gpointer data)
 126 {
 127     ObMenu *menu = val;
 128     return menu->pipe_creator != NULL;
 129 }
 130
 131 static void clear_cache(gpointer key, gpointer val, gpointer data)
 132 {
 133     ObMenu *menu = val;
 134     if (menu->execute)
 135         menu_clear_entries(menu);
 136 }
 137
 138 void menu_clear_pipe_caches(void)
 139 {
 140     /* delete any pipe menus' submenus */
 141     g_hash_table_foreach_remove(menu_hash, menu_pipe_submenu, NULL);
 142     /* empty the top level pipe menus */
 143     g_hash_table_foreach(menu_hash, clear_cache, NULL);
 144 }
 145
 146 void menu_pipe_execute(ObMenu *self)
 147 {
 148     gchar *output;
 149     GError *err = NULL;
 150
 151     if (!self->execute)
 152         return;
 153     if (self->entries) /* the entries are already created and cached */
 154         return;
 155
 156     if (!g_spawn_command_line_sync(self->execute, &output, NULL, NULL, &err)) {
 157         g_message(_("Failed to execute command for pipe-menu \"%s\": %s"),
 158                   self->execute, err->message);
 159         g_error_free(err);
 160         return;
 161     }
 162
 163     if (obt_xml_load_mem(menu_parse_inst, output, strlen(output),
 164                          "openbox_pipe_menu"))
 165     {
 166         menu_parse_state.pipe_creator = self;
 167         menu_parse_state.parent = self;
 168         obt_xml_tree_from_root(menu_parse_inst);
 169         obt_xml_close(menu_parse_inst);
 170     } else {
 171         g_message(_("Invalid output from pipe-menu \"%s\""), self->execute);
 172     }
 173
 174     g_free(output);
 175 }
 176
 177 static ObMenu* menu_from_name(gchar *name)
 178 {
 179     ObMenu *self = NULL;
 180
 181     g_assert(name != NULL);
 182
 183     if (!(self = g_hash_table_lookup(menu_hash, name)))
 184         g_message(_("Attempted to access menu \"%s\" but it does not exist"),
 185                   name);
 186     return self;
 187 }
 188
 189 #define VALID_SHORTCUT(c) (((c) >= '0' && (c) <= '9') || \
 190                            ((c) >= 'A' && (c) <= 'Z') || \
 191                            ((c) >= 'a' && (c) <= 'z'))
 192
 193 static gunichar parse_shortcut(const gchar *label, gboolean allow_shortcut,
 194                                gchar **strippedlabel, guint *position,
 195                                gboolean *always_show)
 196 {
 197     gunichar shortcut = 0;
 198
 199     *position = 0;
 200     *always_show = FALSE;
 201
 202     g_assert(strippedlabel != NULL);
 203
 204     if (label == NULL) {
 205         *strippedlabel = NULL;
 206     } else {
 207         gchar *i;
 208         gboolean escape;
 209
 210         *strippedlabel = g_strdup(label);
 211
 212         /* if allow_shortcut is false, then you can't use the '_', instead you
 213            have to just use the first valid character
 214         */
 215
 216         /* allow __ to escape an underscore */
 217         i = *strippedlabel;
 218         do {
 219             escape = FALSE;
 220             i = strchr(i, '_');
 221             if (i && *(i+1) == '_') {
 222                 gchar *j;
 223
 224                 /* remove the escape '_' from the string */
 225                 for (j = i; *j != '\0'; ++j)
 226                     *j = *(j+1);
 227
 228                 ++i;
 229                 escape = TRUE;
 230             }
 231         } while (escape);
 232
 233         if (allow_shortcut && i != NULL) {
 234             /* there is an underscore in the string */
 235
 236             /* you have to use a printable ascii character for shortcuts
 237                don't allow space either, so you can have like "a _ b"
 238             */
 239             if (VALID_SHORTCUT(*(i+1))) {
 240                 shortcut = g_unichar_tolower(g_utf8_get_char(i+1));
 241                 *position = i - *strippedlabel;
 242                 *always_show = TRUE;
 243
 244                 /* remove the '_' from the string */
 245                 for (; *i != '\0'; ++i)
 246                     *i = *(i+1);
 247             } else if (*(i+1) == '\0') {
 248                 /* no default shortcut if the '_' is the last character
 249                    (eg. "Exit_") for menu entries that you don't want
 250                    to be executed by mistake
 251                 */
 252                     *i = '\0';
 253             }
 254         } else {
 255             /* there is no underscore, so find the first valid character to use
 256                instead */
 257
 258             for (i = *strippedlabel; *i != '\0'; ++i)
 259                 if (VALID_SHORTCUT(*i)) {
 260                     *position = i - *strippedlabel;
 261                     shortcut = g_unichar_tolower(g_utf8_get_char(i));
 262                     break;
 263                 }
 264         }
 265     }
 266     return shortcut;
 267 }
 268
 269 static void parse_menu_item(xmlNodePtr node,  gpointer data)
 270 {
 271     ObMenuParseState *state = data;
 272     gchar *label;
 273     gchar *icon;
 274     ObMenuEntry *e;
 275
 276     if (state->parent) {
 277         /* Don't try to extract "icon" attribute if icons in user-defined
 278            menus are not enabled. */
 279
 280         if (obt_xml_attr_string(node, "label", &label)) {
 281             xmlNodePtr c;
 282             GSList *acts = NULL;
 283
 284             c = obt_xml_find_node(node->children, "action");
 285             while (c) {
 286                 ObActionsAct *action = actions_parse(c);
 287                 if (action)
 288                     acts = g_slist_append(acts, action);
 289                 c = obt_xml_find_node(node->next, "action");
 290             }
 291             e = menu_add_normal(state->parent, -1, label, acts, TRUE);
 292
 293             if (config_menu_show_icons &&
 294                 obt_xml_attr_string(node, "icon", &icon))
 295             {
 296                 RrImage *ic;
 297
 298                 ic = RrImageCacheFindName(ob_rr_icons, icon);
 299                 if (ic)
 300                     RrImageRef(ic);
 301                 else {
 302                     ic = RrImageNew(ob_rr_icons);
 303                     if (!RrImageAddPictureName(ic, icon)) {
 304                         RrImageUnref(ic); /* no need to keep it around */
 305                         ic = NULL;
 306                     }
 307                 }
 308                 e->data.normal.icon = ic;
 309
 310                 if (e->data.normal.icon)
 311                     e->data.normal.icon_alpha = 0xff;
 312
 313                 g_free(icon);
 314             }
 315             g_free(label);
 316         }
 317     }
 318 }
 319
 320 static void parse_menu_separator(xmlNodePtr node, gpointer data)
 321 {
 322     ObMenuParseState *state = data;
 323
 324     if (state->parent) {
 325         gchar *label;
 326
 327         if (!obt_xml_attr_string(node, "label", &label))
 328             label = NULL;
 329
 330         menu_add_separator(state->parent, -1, label);
 331         g_free(label);
 332     }
 333 }
 334
 335 static void parse_menu(xmlNodePtr node, gpointer data)
 336 {
 337     ObMenuParseState *state = data;
 338     gchar *name = NULL, *title = NULL, *script = NULL;
 339     ObMenu *menu;
 340
 341     if (!obt_xml_attr_string(node, "id", &name))
 342         goto parse_menu_fail;
 343
 344     if (!g_hash_table_lookup(menu_hash, name)) {
 345         if (!obt_xml_attr_string(node, "label", &title))
 346             goto parse_menu_fail;
 347
 348         if ((menu = menu_new(name, title, TRUE, NULL))) {
 349             menu->pipe_creator = state->pipe_creator;
 350             if (obt_xml_attr_string(node, "execute", &script)) {
 351                 menu->execute = obt_paths_expand_tilde(script);
 352             } else {
 353                 ObMenu *old;
 354
 355                 old = state->parent;
 356                 state->parent = menu;
 357                 obt_xml_tree(menu_parse_inst, node->children);
 358                 state->parent = old;
 359             }
 360         }
 361     }
 362
 363     if (state->parent)
 364         menu_add_submenu(state->parent, -1, name);
 365
 366 parse_menu_fail:
 367     g_free(name);
 368     g_free(title);
 369     g_free(script);
 370 }
 371
 372 ObMenu* menu_new(const gchar *name, const gchar *title,
 373                  gboolean allow_shortcut_selection, gpointer data)
 374 {
 375     ObMenu *self;
 376
 377     self = g_slice_new0(ObMenu);
 378     self->name = g_strdup(name);
 379     self->data = data;
 380
 381     self->shortcut = parse_shortcut(title, allow_shortcut_selection,
 382                                     &self->title, &self->shortcut_position,
 383                                     &self->shortcut_always_show);
 384
 385     g_hash_table_replace(menu_hash, self->name, self);
 386
 387     /* Each menu has a single more_menu.  When the menu spills past what
 388        can fit on the screen, a new menu frame entry is created from this
 389        more_menu, and a new menu frame for the submenu is created for this
 390        menu, also pointing to the more_menu.
 391
 392        This can be done multiple times using the same more_menu.
 393
 394        more_menu->more_menu will always be NULL, since there is only 1 for
 395        each menu. */
 396     self->more_menu = g_slice_new0(ObMenu);
 397     self->more_menu->name = _("More...");
 398     self->more_menu->title = _("More...");
 399     self->more_menu->data = data;
 400     self->more_menu->shortcut = g_unichar_tolower(g_utf8_get_char("M"));
 401
 402     return self;
 403 }
 404
 405 static void menu_destroy_hash_value(ObMenu *self)
 406 {
 407     /* make sure its not visible */
 408     {
 409         GList *it;
 410         ObMenuFrame *f;
 411
 412         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 413             f = it->data;
 414             if (f->menu == self)
 415                 menu_frame_hide_all();
 416         }
 417     }
 418
 419     if (self->destroy_func)
 420         self->destroy_func(self, self->data);
 421
 422     menu_clear_entries(self);
 423     g_free(self->name);
 424     g_free(self->title);
 425     g_free(self->execute);
 426     g_slice_free(ObMenu, self->more_menu);
 427
 428     g_slice_free(ObMenu, self);
 429 }
 430
 431 void menu_free(ObMenu *menu)
 432 {
 433     if (menu)
 434         g_hash_table_remove(menu_hash, menu->name);
 435 }
 436
 437 static gboolean menu_hide_delay_func(gpointer data)
 438 {
 439     menu_can_hide = TRUE;
 440     return FALSE; /* no repeat */
 441 }
 442
 443 void menu_show(gchar *name, gint x, gint y, gboolean mouse, ObClient *client)
 444 {
 445     ObMenu *self;
 446     ObMenuFrame *frame;
 447
 448     if (!(self = menu_from_name(name)) ||
 449         grab_on_keyboard() || grab_on_pointer()) return;
 450
 451     /* if the requested menu is already the top visible menu, then don't
 452        bother */
 453     if (menu_frame_visible) {
 454         frame = menu_frame_visible->data;
 455         if (frame->menu == self)
 456             return;
 457     }
 458
 459     menu_frame_hide_all();
 460
 461     /* clear the pipe menus when showing a new menu */
 462     menu_clear_pipe_caches();
 463
 464     frame = menu_frame_new(self, 0, client);
 465     if (!menu_frame_show_topmenu(frame, x, y, mouse))
 466         menu_frame_free(frame);
 467     else {
 468         if (!mouse) {
 469             /* select the first entry if it's not a submenu and we opened
 470              * the menu with the keyboard, and skip all headers */
 471             GList *it = frame->entries;
 472             while (it) {
 473                 ObMenuEntryFrame *e = it->data;
 474                 if (e->entry->type == OB_MENU_ENTRY_TYPE_NORMAL) {
 475                     menu_frame_select(frame, e, FALSE);
 476                     break;
 477                 } else if (e->entry->type == OB_MENU_ENTRY_TYPE_SEPARATOR)
 478                     it = g_list_next(it);
 479                 else
 480                     break;
 481             }
 482         }
 483
 484         /* reset the hide timer */
 485         if (!mouse)
 486             menu_can_hide = TRUE;
 487         else {
 488             menu_can_hide = FALSE;
 489             g_timeout_add_full(G_PRIORITY_DEFAULT,
 490                                config_menu_hide_delay,
 491                                menu_hide_delay_func,
 492                                NULL, NULL);
 493         }
 494     }
 495 }
 496
 497 gboolean menu_hide_delay_reached(void)
 498 {
 499     return menu_can_hide;
 500 }
 501
 502 static ObMenuEntry* menu_entry_new(ObMenu *menu, ObMenuEntryType type, gint id)
 503 {
 504     ObMenuEntry *self;
 505
 506     g_assert(menu);
 507
 508     self = g_slice_new0(ObMenuEntry);
 509     self->ref = 1;
 510     self->type = type;
 511     self->menu = menu;
 512     self->id = id;
 513
 514     switch (type) {
 515     case OB_MENU_ENTRY_TYPE_NORMAL:
 516         self->data.normal.enabled = TRUE;
 517         break;
 518     case OB_MENU_ENTRY_TYPE_SUBMENU:
 519     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 520         break;
 521     }
 522
 523     return self;
 524 }
 525
 526 void menu_entry_ref(ObMenuEntry *self)
 527 {
 528     ++self->ref;
 529 }
 530
 531 void menu_entry_unref(ObMenuEntry *self)
 532 {
 533     if (self && --self->ref == 0) {
 534         switch (self->type) {
 535         case OB_MENU_ENTRY_TYPE_NORMAL:
 536             RrImageUnref(self->data.normal.icon);
 537             g_free(self->data.normal.label);
 538             while (self->data.normal.actions) {
 539                 actions_act_unref(self->data.normal.actions->data);
 540                 self->data.normal.actions =
 541                     g_slist_delete_link(self->data.normal.actions,
 542                                         self->data.normal.actions);
 543             }
 544             break;
 545         case OB_MENU_ENTRY_TYPE_SUBMENU:
 546             g_free(self->data.submenu.name);
 547             break;
 548         case OB_MENU_ENTRY_TYPE_SEPARATOR:
 549             g_free(self->data.separator.label);
 550             break;
 551         }
 552
 553         g_slice_free(ObMenuEntry, self);
 554     }
 555 }
 556
 557 void menu_clear_entries(ObMenu *self)
 558 {
 559 #ifdef DEBUG
 560     /* assert that the menu isn't visible */
 561     {
 562         GList *it;
 563         ObMenuFrame *f;
 564
 565         for (it = menu_frame_visible; it; it = g_list_next(it)) {
 566             f = it->data;
 567             g_assert(f->menu != self);
 568         }
 569     }
 570 #endif
 571
 572     while (self->entries) {
 573         menu_entry_unref(self->entries->data);
 574         self->entries = g_list_delete_link(self->entries, self->entries);
 575     }
 576     self->more_menu->entries = self->entries; /* keep it in sync */
 577 }
 578
 579 void menu_entry_remove(ObMenuEntry *self)
 580 {
 581     self->menu->entries = g_list_remove(self->menu->entries, self);
 582     menu_entry_unref(self);
 583 }
 584
 585 ObMenuEntry* menu_add_normal(ObMenu *self, gint id, const gchar *label,
 586                              GSList *actions, gboolean allow_shortcut)
 587 {
 588     ObMenuEntry *e;
 589
 590     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_NORMAL, id);
 591     e->data.normal.actions = actions;
 592
 593     menu_entry_set_label(e, label, allow_shortcut);
 594
 595     self->entries = g_list_append(self->entries, e);
 596     self->more_menu->entries = self->entries; /* keep it in sync */
 597     return e;
 598 }
 599
 600 ObMenuEntry* menu_get_more(ObMenu *self, guint show_from)
 601 {
 602     ObMenuEntry *e;
 603     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, -1);
 604     /* points to itself */
 605     e->data.submenu.name = g_strdup(self->name);
 606     e->data.submenu.submenu = self;
 607     e->data.submenu.show_from = show_from;
 608     return e;
 609 }
 610
 611 ObMenuEntry* menu_add_submenu(ObMenu *self, gint id, const gchar *submenu)
 612 {
 613     ObMenuEntry *e;
 614
 615     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SUBMENU, id);
 616     e->data.submenu.name = g_strdup(submenu);
 617
 618     self->entries = g_list_append(self->entries, e);
 619     self->more_menu->entries = self->entries; /* keep it in sync */
 620     return e;
 621 }
 622
 623 ObMenuEntry* menu_add_separator(ObMenu *self, gint id, const gchar *label)
 624 {
 625     ObMenuEntry *e;
 626
 627     e = menu_entry_new(self, OB_MENU_ENTRY_TYPE_SEPARATOR, id);
 628
 629     menu_entry_set_label(e, label, FALSE);
 630
 631     self->entries = g_list_append(self->entries, e);
 632     self->more_menu->entries = self->entries; /* keep it in sync */
 633     return e;
 634 }
 635
 636 void menu_set_show_func(ObMenu *self, ObMenuShowFunc func)
 637 {
 638     self->show_func = func;
 639 }
 640
 641 void menu_set_hide_func(ObMenu *self, ObMenuHideFunc func)
 642 {
 643     self->hide_func = func;
 644 }
 645
 646 void menu_set_update_func(ObMenu *self, ObMenuUpdateFunc func)
 647 {
 648     self->update_func = func;
 649 }
 650
 651 void menu_set_execute_func(ObMenu *self, ObMenuExecuteFunc func)
 652 {
 653     self->execute_func = func;
 654     self->more_menu->execute_func = func; /* keep it in sync */
 655 }
 656
 657 void menu_set_cleanup_func(ObMenu *self, ObMenuCleanupFunc func)
 658 {
 659     self->cleanup_func = func;
 660 }
 661
 662 void menu_set_destroy_func(ObMenu *self, ObMenuDestroyFunc func)
 663 {
 664     self->destroy_func = func;
 665 }
 666
 667 void menu_set_place_func(ObMenu *self, ObMenuPlaceFunc func)
 668 {
 669     self->place_func = func;
 670 }
 671
 672 ObMenuEntry* menu_find_entry_id(ObMenu *self, gint id)
 673 {
 674     ObMenuEntry *ret = NULL;
 675     GList *it;
 676
 677     for (it = self->entries; it; it = g_list_next(it)) {
 678         ObMenuEntry *e = it->data;
 679
 680         if (e->id == id) {
 681             ret = e;
 682             break;
 683         }
 684     }
 685     return ret;
 686 }
 687
 688 void menu_find_submenus(ObMenu *self)
 689 {
 690     GList *it;
 691
 692     for (it = self->entries; it; it = g_list_next(it)) {
 693         ObMenuEntry *e = it->data;
 694
 695         if (e->type == OB_MENU_ENTRY_TYPE_SUBMENU)
 696             e->data.submenu.submenu = menu_from_name(e->data.submenu.name);
 697     }
 698 }
 699
 700 void menu_entry_set_label(ObMenuEntry *self, const gchar *label,
 701                           gboolean allow_shortcut)
 702 {
 703     switch (self->type) {
 704     case OB_MENU_ENTRY_TYPE_SEPARATOR:
 705         g_free(self->data.separator.label);
 706         self->data.separator.label = g_strdup(label);
 707         break;
 708     case OB_MENU_ENTRY_TYPE_NORMAL:
 709         g_free(self->data.normal.label);
 710         self->data.normal.shortcut =
 711             parse_shortcut(label, allow_shortcut, &self->data.normal.label,
 712                            &self->data.normal.shortcut_position,
 713                            &self->data.normal.shortcut_always_show);
 714         break;
 715     default:
 716         g_assert_not_reached();
 717     }
 718 }
 719
 720 void menu_show_all_shortcuts(ObMenu *self, gboolean show)
 721 {
 722     self->show_all_shortcuts = show;
 723 }