gntmenu.c

   1 /**
   2  * GNT - The GLib Ncurses Toolkit
   3  *
   4  * GNT is the legal property of its developers, whose names are too numerous
   5  * to list here.  Please refer to the COPYRIGHT file distributed with this
   6  * source distribution.
   7  *
   8  * This library is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
  21  */
  22
  23 #include "gntmenu.h"
  24 #include "gntmenuitemcheck.h"
  25
  26 #include <ctype.h>
  27 #include <string.h>
  28
  29 enum
  30 {
  31         SIGS = 1,
  32 };
  33
  34 enum
  35 {
  36         ITEM_TEXT = 0,
  37         ITEM_TRIGGER,
  38         ITEM_SUBMENU,
  39         NUM_COLUMNS
  40 };
  41
  42 static GntTreeClass *parent_class = NULL;
  43
  44 static void (*org_draw)(GntWidget *wid);
  45 static void (*org_destroy)(GntWidget *wid);
  46 static void (*org_map)(GntWidget *wid);
  47 static void (*org_size_request)(GntWidget *wid);
  48 static gboolean (*org_key_pressed)(GntWidget *w, const char *t);
  49
  50 static void
  51 menu_hide_all(GntMenu *menu)
  52 {
  53         while (menu->parentmenu)
  54                 menu = menu->parentmenu;
  55         gnt_widget_hide(GNT_WIDGET(menu));
  56 }
  57
  58 static void
  59 gnt_menu_draw(GntWidget *widget)
  60 {
  61         GntMenu *menu = GNT_MENU(widget);
  62         GList *iter;
  63         chtype type;
  64         int i;
  65
  66         if (menu->type == GNT_MENU_TOPLEVEL) {
  67                 wbkgdset(widget->window, '\0' | gnt_color_pair(GNT_COLOR_HIGHLIGHT));
  68                 werase(widget->window);
  69
  70                 for (i = 0, iter = menu->list; iter; iter = iter->next, i++) {
  71                         GntMenuItem *item = GNT_MENU_ITEM(iter->data);
  72                         type = ' ' | gnt_color_pair(GNT_COLOR_HIGHLIGHT);
  73                         if (i == menu->selected)
  74                                 type |= A_REVERSE;
  75                         item->priv.x = getcurx(widget->window) + widget->priv.x;
  76                         item->priv.y = getcury(widget->window) + widget->priv.y + 1;
  77                         wbkgdset(widget->window, type);
  78                         wprintw(widget->window, " %s   ", item->text);
  79                 }
  80         } else {
  81                 org_draw(widget);
  82         }
  83
  84         GNTDEBUG;
  85 }
  86
  87 static void
  88 gnt_menu_size_request(GntWidget *widget)
  89 {
  90         GntMenu *menu = GNT_MENU(widget);
  91
  92         if (menu->type == GNT_MENU_TOPLEVEL) {
  93                 widget->priv.height = 1;
  94                 widget->priv.width = getmaxx(stdscr);
  95         } else {
  96                 org_size_request(widget);
  97                 widget->priv.height = g_list_length(menu->list) + 2;
  98         }
  99 }
 100
 101 static void
 102 menu_tree_add(GntMenu *menu, GntMenuItem *item, GntMenuItem *parent)
 103 {
 104         char trigger[4] = "\0 )\0";
 105
 106         if ((trigger[1] = gnt_menuitem_get_trigger(item)) && trigger[1] != ' ')
 107                 trigger[0] = '(';
 108
 109         if (GNT_IS_MENU_ITEM_CHECK(item)) {
 110                 gnt_tree_add_choice(GNT_TREE(menu), item,
 111                         gnt_tree_create_row(GNT_TREE(menu), item->text, trigger, " "), parent, NULL);
 112                 gnt_tree_set_choice(GNT_TREE(menu), item, gnt_menuitem_check_get_checked(GNT_MENU_ITEM_CHECK(item)));
 113         } else
 114                 gnt_tree_add_row_last(GNT_TREE(menu), item,
 115                         gnt_tree_create_row(GNT_TREE(menu), item->text, trigger, item->submenu ? ">" : " "), parent);
 116
 117         if (0 && item->submenu) {
 118                 GntMenu *sub = GNT_MENU(item->submenu);
 119                 GList *iter;
 120                 for (iter = sub->list; iter; iter = iter->next) {
 121                         GntMenuItem *it = GNT_MENU_ITEM(iter->data);
 122                         menu_tree_add(menu, it, item);
 123                 }
 124         }
 125 }
 126
 127 #define GET_VAL(ch)  ((ch >= '0' && ch <= '9') ? (ch - '0') : (ch >= 'a' && ch <= 'z') ? (10 + ch - 'a') : 36)
 128
 129 static void
 130 assign_triggers(GntMenu *menu)
 131 {
 132         GList *iter;
 133         gboolean bools[37];
 134
 135         memset(bools, 0, sizeof(bools));
 136         bools[36] = 1;
 137
 138         for (iter = menu->list; iter; iter = iter->next) {
 139                 GntMenuItem *item = iter->data;
 140                 char trigger = tolower(gnt_menuitem_get_trigger(item));
 141                 if (trigger == '\0' || trigger == ' ')
 142                         continue;
 143                 bools[(int)GET_VAL(trigger)] = 1;
 144         }
 145
 146         for (iter = menu->list; iter; iter = iter->next) {
 147                 GntMenuItem *item = iter->data;
 148                 char trigger = gnt_menuitem_get_trigger(item);
 149                 const char *text = item->text;
 150                 if (trigger != '\0')
 151                         continue;
 152                 while (*text) {
 153                         char ch = tolower(*text++);
 154                         if (ch == ' ' || bools[(int)GET_VAL(ch)])
 155                                 continue;
 156                         trigger = ch;
 157                         break;
 158                 }
 159                 if (trigger == 0)
 160                         trigger = item->text[0];
 161                 gnt_menuitem_set_trigger(item, trigger);
 162                 bools[(int)GET_VAL(trigger)] = 1;
 163         }
 164 }
 165
 166 static void
 167 gnt_menu_map(GntWidget *widget)
 168 {
 169         GntMenu *menu = GNT_MENU(widget);
 170
 171         if (menu->type == GNT_MENU_TOPLEVEL) {
 172                 gnt_widget_size_request(widget);
 173         } else {
 174                 /* Populate the tree */
 175                 GList *iter;
 176                 gnt_tree_remove_all(GNT_TREE(widget));
 177                 /* Try to assign some trigger for the items */
 178                 assign_triggers(menu);
 179                 for (iter = menu->list; iter; iter = iter->next) {
 180                         GntMenuItem *item = GNT_MENU_ITEM(iter->data);
 181                         menu_tree_add(menu, item, NULL);
 182                 }
 183                 org_map(widget);
 184                 gnt_tree_adjust_columns(GNT_TREE(widget));
 185         }
 186         GNTDEBUG;
 187 }
 188
 189 static void
 190 menuitem_activate(GntMenu *menu, GntMenuItem *item)
 191 {
 192         if (!item)
 193                 return;
 194
 195         if (gnt_menuitem_activate(item)) {
 196                 menu_hide_all(menu);
 197         } else {
 198                 if (item->submenu) {
 199                         GntMenu *sub = GNT_MENU(item->submenu);
 200                         menu->submenu = sub;
 201                         sub->type = GNT_MENU_POPUP;     /* Submenus are *never* toplevel */
 202                         sub->parentmenu = menu;
 203                         if (menu->type != GNT_MENU_TOPLEVEL) {
 204                                 GntWidget *widget = GNT_WIDGET(menu);
 205                                 item->priv.x = widget->priv.x + widget->priv.width - 1;
 206                                 item->priv.y = widget->priv.y + gnt_tree_get_selection_visible_line(GNT_TREE(menu));
 207                         }
 208                         gnt_widget_set_position(GNT_WIDGET(sub), item->priv.x, item->priv.y);
 209                         GNT_WIDGET_UNSET_FLAGS(GNT_WIDGET(sub), GNT_WIDGET_INVISIBLE);
 210                         gnt_widget_draw(GNT_WIDGET(sub));
 211                 } else {
 212                         menu_hide_all(menu);
 213                 }
 214         }
 215 }
 216
 217 static GList*
 218 find_item_with_trigger(GList *start, GList *end, char trigger)
 219 {
 220         GList *iter;
 221         for (iter = start; iter != (end ? end : NULL); iter = iter->next) {
 222                 if (gnt_menuitem_get_trigger(iter->data) == trigger)
 223                         return iter;
 224         }
 225         return NULL;
 226 }
 227
 228 static gboolean
 229 check_for_trigger(GntMenu *menu, char trigger)
 230 {
 231         /* check for a trigger key */
 232         GList *iter;
 233         GList *find;
 234         GList *nth = g_list_find(menu->list, gnt_tree_get_selection_data(GNT_TREE(menu)));
 235
 236         if (nth == NULL)
 237                 return FALSE;
 238
 239         find = find_item_with_trigger(nth->next, NULL, trigger);
 240         if (!find)
 241                 find = find_item_with_trigger(menu->list, nth->next, trigger);
 242         if (!find)
 243                 return FALSE;
 244         if (find != nth) {
 245                 gnt_tree_set_selected(GNT_TREE(menu), find->data);
 246                 iter = find_item_with_trigger(find->next, NULL, trigger);
 247                 if (iter != NULL && iter != find)
 248                         return TRUE;
 249                 iter = find_item_with_trigger(menu->list, nth, trigger);
 250                 if (iter != NULL && iter != find)
 251                         return TRUE;
 252         }
 253         gnt_widget_activate(GNT_WIDGET(menu));
 254         return TRUE;
 255 }
 256
 257 static gboolean
 258 gnt_menu_key_pressed(GntWidget *widget, const char *text)
 259 {
 260         GntMenu *menu = GNT_MENU(widget);
 261         int current = menu->selected;
 262
 263         if (menu->submenu) {
 264                 GntMenu *sub = menu;
 265                 do sub = sub->submenu; while (sub->submenu);
 266                 if (gnt_widget_key_pressed(GNT_WIDGET(sub), text))
 267                         return TRUE;
 268         }
 269
 270         if ((text[0] == 27 && text[1] == 0) ||
 271                         (menu->type != GNT_MENU_TOPLEVEL && strcmp(text, GNT_KEY_LEFT) == 0)) {
 272                 /* Escape closes menu */
 273                 GntMenu *par = menu->parentmenu;
 274                 if (par != NULL) {
 275                         par->submenu = NULL;
 276                         gnt_widget_hide(widget);
 277                 } else
 278                         gnt_widget_hide(widget);
 279                 return TRUE;
 280         }
 281
 282         if (menu->type == GNT_MENU_TOPLEVEL) {
 283                 if (strcmp(text, GNT_KEY_LEFT) == 0) {
 284                         menu->selected--;
 285                         if (menu->selected < 0)
 286                                 menu->selected = g_list_length(menu->list) - 1;
 287                 } else if (strcmp(text, GNT_KEY_RIGHT) == 0) {
 288                         menu->selected++;
 289                         if (menu->selected >= g_list_length(menu->list))
 290                                 menu->selected = 0;
 291                 } else if (strcmp(text, GNT_KEY_ENTER) == 0 ||
 292                                 strcmp(text, GNT_KEY_DOWN) == 0) {
 293                         gnt_widget_activate(widget);
 294                 }
 295
 296                 if (current != menu->selected) {
 297                         GntMenu *sub = menu->submenu;
 298                         if (sub)
 299                                 gnt_widget_hide(GNT_WIDGET(sub));
 300                         gnt_widget_draw(widget);
 301                         return TRUE;
 302                 }
 303         } else {
 304                 if (text[1] == '\0') {
 305                         if (check_for_trigger(menu, text[0]))
 306                                 return TRUE;
 307                 } else if (strcmp(text, GNT_KEY_RIGHT) == 0) {
 308                         GntMenuItem *item = gnt_tree_get_selection_data(GNT_TREE(menu));
 309                         if (item && item->submenu) {
 310                                 menuitem_activate(menu, item);
 311                                 return TRUE;
 312                         }
 313                 }
 314                 return org_key_pressed(widget, text);
 315         }
 316
 317         return FALSE;
 318 }
 319
 320 static void
 321 gnt_menu_destroy(GntWidget *widget)
 322 {
 323         GntMenu *menu = GNT_MENU(widget);
 324         g_list_foreach(menu->list, (GFunc)g_object_unref, NULL);
 325         g_list_free(menu->list);
 326         org_destroy(widget);
 327 }
 328
 329 static void
 330 gnt_menu_toggled(GntTree *tree, gpointer key)
 331 {
 332         GntMenuItem *item = GNT_MENU_ITEM(key);
 333         GntMenu *menu = GNT_MENU(tree);
 334         gboolean check = gnt_menuitem_check_get_checked(GNT_MENU_ITEM_CHECK(item));
 335         gnt_menuitem_check_set_checked(GNT_MENU_ITEM_CHECK(item), !check);
 336         gnt_menuitem_activate(item);
 337         while (menu) {
 338                 gnt_widget_hide(GNT_WIDGET(menu));
 339                 menu = menu->parentmenu;
 340         }
 341 }
 342
 343 static void
 344 gnt_menu_activate(GntWidget *widget)
 345 {
 346         GntMenu *menu = GNT_MENU(widget);
 347         GntMenuItem *item;
 348
 349         if (menu->type == GNT_MENU_TOPLEVEL) {
 350                 item = g_list_nth_data(menu->list, menu->selected);
 351         } else {
 352                 item = gnt_tree_get_selection_data(GNT_TREE(menu));
 353         }
 354
 355         if (item) {
 356                 if (GNT_IS_MENU_ITEM_CHECK(item))
 357                         gnt_menu_toggled(GNT_TREE(widget), item);
 358                 else
 359                         menuitem_activate(menu, item);
 360         }
 361 }
 362
 363 static void
 364 gnt_menu_hide(GntWidget *widget)
 365 {
 366         GntMenu *sub, *menu = GNT_MENU(widget);
 367
 368         while ((sub = menu->submenu))
 369                 gnt_widget_hide(GNT_WIDGET(sub));
 370         if (menu->parentmenu)
 371                 menu->parentmenu->submenu = NULL;
 372 }
 373
 374 static void
 375 gnt_menu_class_init(GntMenuClass *klass)
 376 {
 377         GntWidgetClass *wid_class = GNT_WIDGET_CLASS(klass);
 378         parent_class = GNT_TREE_CLASS(klass);
 379
 380         org_destroy = wid_class->destroy;
 381         org_map = wid_class->map;
 382         org_draw = wid_class->draw;
 383         org_key_pressed = wid_class->key_pressed;
 384         org_size_request = wid_class->size_request;
 385
 386         wid_class->destroy = gnt_menu_destroy;
 387         wid_class->draw = gnt_menu_draw;
 388         wid_class->map = gnt_menu_map;
 389         wid_class->size_request = gnt_menu_size_request;
 390         wid_class->key_pressed = gnt_menu_key_pressed;
 391         wid_class->activate = gnt_menu_activate;
 392         wid_class->hide = gnt_menu_hide;
 393
 394         parent_class->toggled = gnt_menu_toggled;
 395
 396         GNTDEBUG;
 397 }
 398
 399 static void
 400 gnt_menu_init(GTypeInstance *instance, gpointer class)
 401 {
 402         GntWidget *widget = GNT_WIDGET(instance);
 403         GNT_WIDGET_SET_FLAGS(widget, GNT_WIDGET_NO_SHADOW | GNT_WIDGET_NO_BORDER |
 404                         GNT_WIDGET_CAN_TAKE_FOCUS | GNT_WIDGET_TRANSIENT);
 405         GNTDEBUG;
 406 }
 407
 408 /******************************************************************************
 409  * GntMenu API
 410  *****************************************************************************/
 411 GType
 412 gnt_menu_get_gtype(void)
 413 {
 414         static GType type = 0;
 415
 416         if(type == 0)
 417         {
 418                 static const GTypeInfo info = {
 419                         sizeof(GntMenuClass),
 420                         NULL,                                   /* base_init            */
 421                         NULL,                                   /* base_finalize        */
 422                         (GClassInitFunc)gnt_menu_class_init,
 423                         NULL,                                   /* class_finalize       */
 424                         NULL,                                   /* class_data           */
 425                         sizeof(GntMenu),
 426                         0,                                              /* n_preallocs          */
 427                         gnt_menu_init,                  /* instance_init        */
 428                         NULL                                    /* value_table          */
 429                 };
 430
 431                 type = g_type_register_static(GNT_TYPE_TREE,
 432                                                                           "GntMenu",
 433                                                                           &info, 0);
 434         }
 435
 436         return type;
 437 }
 438
 439 GntWidget *gnt_menu_new(GntMenuType type)
 440 {
 441         GntWidget *widget = g_object_new(GNT_TYPE_MENU, NULL);
 442         GntMenu *menu = GNT_MENU(widget);
 443         menu->list = NULL;
 444         menu->selected = 0;
 445         menu->type = type;
 446
 447         if (type == GNT_MENU_TOPLEVEL) {
 448                 widget->priv.x = 0;
 449                 widget->priv.y = 0;
 450         } else {
 451                 GNT_TREE(widget)->show_separator = FALSE;
 452                 g_object_set(G_OBJECT(widget), "columns", NUM_COLUMNS, NULL);
 453                 gnt_tree_set_col_width(GNT_TREE(widget), ITEM_TRIGGER, 3);
 454                 gnt_tree_set_column_resizable(GNT_TREE(widget), ITEM_TRIGGER, FALSE);
 455                 gnt_tree_set_col_width(GNT_TREE(widget), ITEM_SUBMENU, 1);
 456                 gnt_tree_set_column_resizable(GNT_TREE(widget), ITEM_SUBMENU, FALSE);
 457                 GNT_WIDGET_UNSET_FLAGS(widget, GNT_WIDGET_NO_BORDER);
 458         }
 459
 460         return widget;
 461 }
 462
 463 void gnt_menu_add_item(GntMenu *menu, GntMenuItem *item)
 464 {
 465         menu->list = g_list_append(menu->list, item);
 466         g_object_ref(item);
 467 }
 468
 469 GntMenuItem *gnt_menu_get_item(GntMenu *menu, const char *id)
 470 {
 471         GntMenuItem *item = NULL;
 472         GList *iter = menu->list;
 473
 474         if (!id || !*id)
 475                 return NULL;
 476
 477         for (; iter; iter = iter->next) {
 478                 GntMenu *sub;
 479                 item = iter->data;
 480                 sub = gnt_menuitem_get_submenu(item);
 481                 if (sub) {
 482                         item = gnt_menu_get_item(sub, id);
 483                         if (item)
 484                                 break;
 485                 } else {
 486                         const char *itid = gnt_menuitem_get_id(item);
 487                         if (itid && strcmp(itid, id) == 0)
 488                                 break;
 489                         /* XXX: Perhaps look at the menu-label as well? */
 490                 }
 491                 item = NULL;
 492         }
 493
 494         if (item)
 495                 menuitem_activate(menu, item);
 496
 497         return item;
 498 }
 499