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