src/screen_keydef.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "screen_keydef.h"
  21 #include "screen_interface.h"
  22 #include "i18n.h"
  23 #include "conf.h"
  24 #include "screen.h"
  25 #include "screen_utils.h"
  26
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <glib.h>
  30
  31 #define STATIC_ITEMS      0
  32 #define STATIC_SUB_ITEMS  1
  33 #define BUFSIZE 256
  34
  35 #define LIST_ITEM_APPLY()   ((unsigned)command_list_length)
  36 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  37 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  38
  39 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  40 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  41
  42
  43 static list_window_t *lw = NULL;
  44 static unsigned command_list_length = 0;
  45 static command_definition_t *cmds = NULL;
  46
  47 static int subcmd = -1;
  48 static unsigned subcmd_length = 0;
  49 static unsigned subcmd_addpos = 0;
  50
  51 static int
  52 keybindings_changed(void)
  53 {
  54         command_definition_t *orginal_cmds = get_command_definitions();
  55         size_t size = command_list_length * sizeof(command_definition_t);
  56
  57         return memcmp(orginal_cmds, cmds, size);
  58 }
  59
  60 static void
  61 apply_keys(void)
  62 {
  63         if (keybindings_changed()) {
  64                 command_definition_t *orginal_cmds = get_command_definitions();
  65                 size_t size = command_list_length * sizeof(command_definition_t);
  66
  67                 memcpy(orginal_cmds, cmds, size);
  68                 screen_status_printf(_("You have new key bindings"));
  69         } else
  70                 screen_status_printf(_("Keybindings unchanged."));
  71 }
  72
  73 static int
  74 save_keys(void)
  75 {
  76         FILE *f;
  77         char *filename;
  78
  79         if (check_user_conf_dir()) {
  80                 screen_status_printf(_("Error: Unable to create directory ~/.ncmpc - %s"),
  81                                      strerror(errno));
  82                 screen_bell();
  83                 return -1;
  84         }
  85
  86         filename = get_user_key_binding_filename();
  87
  88         if ((f = fopen(filename,"w")) == NULL) {
  89                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  90                 screen_bell();
  91                 g_free(filename);
  92                 return -1;
  93         }
  94
  95         if (write_key_bindings(f, KEYDEF_WRITE_HEADER))
  96                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  97         else
  98                 screen_status_printf(_("Wrote %s"), filename);
  99
 100         g_free(filename);
 101         return fclose(f);
 102 }
 103
 104 static void
 105 check_subcmd_length(void)
 106 {
 107         subcmd_length = 0;
 108         while (subcmd_length < MAX_COMMAND_KEYS &&
 109                cmds[subcmd].keys[subcmd_length] > 0)
 110                 ++subcmd_length;
 111
 112         if (subcmd_length < MAX_COMMAND_KEYS) {
 113                 subcmd_addpos = subcmd_length;
 114                 subcmd_length++;
 115         } else
 116                 subcmd_addpos = 0;
 117         subcmd_length += STATIC_SUB_ITEMS;
 118 }
 119
 120 static void
 121 keydef_paint(void);
 122
 123 static void
 124 keydef_repaint(void)
 125 {
 126         keydef_paint();
 127         wrefresh(lw->w);
 128 }
 129
 130 static void
 131 delete_key(int cmd_index, int key_index)
 132 {
 133         int i = key_index+1;
 134
 135         screen_status_printf(_("Deleted"));
 136         while (i < MAX_COMMAND_KEYS && cmds[cmd_index].keys[i])
 137                 cmds[cmd_index].keys[key_index++] = cmds[cmd_index].keys[i++];
 138         cmds[cmd_index].keys[key_index] = 0;
 139         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 140         check_subcmd_length();
 141
 142         /* repaint */
 143         keydef_repaint();
 144
 145         /* update key conflict flags */
 146         check_key_bindings(cmds, NULL, 0);
 147 }
 148
 149 static void
 150 assign_new_key(int cmd_index, int key_index)
 151 {
 152         int key;
 153         char *buf;
 154         command_t cmd;
 155
 156         buf = g_strdup_printf(_("Enter new key for %s: "), cmds[cmd_index].name);
 157         key = screen_getch(buf);
 158         g_free(buf);
 159
 160         if (key==ERR) {
 161                 screen_status_printf(_("Aborted"));
 162                 return;
 163         }
 164
 165         cmd = find_key_command(key, cmds);
 166         if (cmd != CMD_NONE && cmd != cmds[cmd_index].command) {
 167                 screen_status_printf(_("Error: key %s is already used for %s"),
 168                                      key2str(key),
 169                                      get_key_command_name(cmd));
 170                 screen_bell();
 171                 return;
 172         }
 173
 174         cmds[cmd_index].keys[key_index] = key;
 175         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 176
 177         screen_status_printf(_("Assigned %s to %s"),
 178                              key2str(key),cmds[cmd_index].name);
 179         check_subcmd_length();
 180
 181         /* repaint */
 182         keydef_repaint();
 183
 184         /* update key conflict flags */
 185         check_key_bindings(cmds, NULL, 0);
 186 }
 187
 188 static const char *
 189 list_callback(unsigned idx, bool *highlight, G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
 190 {
 191         static char buf[BUFSIZE];
 192
 193         if (subcmd < 0) {
 194                 if (idx < (unsigned)command_list_length) {
 195                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 196                                 *highlight = true;
 197                         return cmds[idx].name;
 198                 } else if (idx == LIST_ITEM_APPLY())
 199                         return LIST_ITEM_APPLY_LABEL;
 200                 else if (idx == LIST_ITEM_SAVE())
 201                         return LIST_ITEM_SAVE_LABEL;
 202         } else {
 203                 if (idx == 0)
 204                         return "[..]";
 205                 idx--;
 206                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 207                         g_snprintf(buf,
 208                                    BUFSIZE, "%d. %-20s   (%d) ",
 209                                    idx + 1,
 210                                    key2str(cmds[subcmd].keys[idx]),
 211                                    cmds[subcmd].keys[idx]);
 212                         return buf;
 213                 } else if (idx == subcmd_addpos) {
 214                         g_snprintf(buf, BUFSIZE, "%d. %s",
 215                                    idx + 1, _("Add new key"));
 216                         return buf;
 217                 }
 218         }
 219
 220         return NULL;
 221 }
 222
 223 static void
 224 keydef_init(WINDOW *w, int cols, int rows)
 225 {
 226         lw = list_window_init(w, cols, rows);
 227 }
 228
 229 static void
 230 keydef_resize(int cols, int rows)
 231 {
 232         lw->cols = cols;
 233         lw->rows = rows;
 234 }
 235
 236 static void
 237 keydef_exit(void)
 238 {
 239         list_window_free(lw);
 240         if (cmds)
 241                 g_free(cmds);
 242         cmds = NULL;
 243         lw = NULL;
 244 }
 245
 246 static void
 247 keydef_open(G_GNUC_UNUSED struct mpdclient *c)
 248 {
 249         if (cmds == NULL) {
 250                 command_definition_t *current_cmds = get_command_definitions();
 251                 size_t cmds_size;
 252
 253                 command_list_length = 0;
 254                 while (current_cmds[command_list_length].name)
 255                         command_list_length++;
 256
 257                 cmds_size = (command_list_length+1) * sizeof(command_definition_t);
 258                 cmds = g_malloc0(cmds_size);
 259                 memcpy(cmds, current_cmds, cmds_size);
 260                 command_list_length += STATIC_ITEMS;
 261         }
 262
 263         subcmd = -1;
 264         list_window_check_selected(lw, LIST_LENGTH());
 265 }
 266
 267 static void
 268 keydef_close(void)
 269 {
 270         if (cmds && !keybindings_changed()) {
 271                 g_free(cmds);
 272                 cmds = NULL;
 273         } else
 274                 screen_status_printf(_("Note: Did you forget to \'Apply\' your changes?"));
 275 }
 276
 277 static const char *
 278 keydef_title(char *str, size_t size)
 279 {
 280         if (subcmd < 0)
 281                 return _("Edit key bindings");
 282
 283         g_snprintf(str, size, _("Edit keys for %s"), cmds[subcmd].name);
 284         return str;
 285 }
 286
 287 static void
 288 keydef_paint(void)
 289 {
 290         list_window_paint(lw, list_callback, NULL);
 291 }
 292
 293 static bool
 294 keydef_cmd(G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
 295 {
 296         int length = LIST_LENGTH();
 297
 298         if (subcmd >= 0)
 299                 length = subcmd_length;
 300
 301         if (cmd == CMD_LIST_RANGE_SELECT)
 302                 return false;
 303
 304         if (list_window_cmd(lw, length, cmd)) {
 305                 keydef_repaint();
 306                 return true;
 307         }
 308
 309         switch(cmd) {
 310         case CMD_PLAY:
 311                 if (subcmd < 0) {
 312                         if (lw->selected == LIST_ITEM_APPLY())
 313                                 apply_keys();
 314                         else if (lw->selected == LIST_ITEM_SAVE()) {
 315                                 apply_keys();
 316                                 save_keys();
 317                         } else {
 318                                 subcmd = lw->selected;
 319                                 lw->selected=0;
 320                                 lw->selected_start = lw->selected;
 321                                 lw->selected_end = lw->selected;
 322                                 check_subcmd_length();
 323
 324                                 keydef_repaint();
 325                         }
 326                 } else {
 327                         if (lw->selected == 0) { /* up */
 328                                 lw->selected = subcmd;
 329                                 lw->selected_start = lw->selected;
 330                                 lw->selected_end = lw->selected;
 331                                 subcmd = -1;
 332
 333                                 keydef_repaint();
 334                         } else
 335                                 assign_new_key(subcmd,
 336                                                lw->selected - STATIC_SUB_ITEMS);
 337                 }
 338                 return true;
 339         case CMD_GO_PARENT_DIRECTORY:
 340                 if (subcmd >=0) {
 341                         lw->selected = subcmd;
 342                         lw->selected_start = lw->selected;
 343                         lw->selected_end = lw->selected;
 344                         subcmd = -1;
 345
 346                         keydef_repaint();
 347                 }
 348                 break;
 349         case CMD_DELETE:
 350                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 351                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 352                 return true;
 353                 break;
 354         case CMD_SAVE_PLAYLIST:
 355                 apply_keys();
 356                 save_keys();
 357                 break;
 358         case CMD_LIST_FIND:
 359         case CMD_LIST_RFIND:
 360         case CMD_LIST_FIND_NEXT:
 361         case CMD_LIST_RFIND_NEXT:
 362                 screen_find(lw, length,
 363                             cmd, list_callback, NULL);
 364                 keydef_repaint();
 365                 return true;
 366
 367         default:
 368                 break;
 369         }
 370
 371         return false;
 372 }
 373
 374 const struct screen_functions screen_keydef = {
 375         .init = keydef_init,
 376         .exit = keydef_exit,
 377         .open = keydef_open,
 378         .close = keydef_close,
 379         .resize = keydef_resize,
 380         .paint = keydef_paint,
 381         .cmd = keydef_cmd,
 382         .get_title = keydef_title,
 383 };