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 "screen_message.h"
  23 #include "i18n.h"
  24 #include "conf.h"
  25 #include "screen.h"
  26 #include "screen_utils.h"
  27
  28 #include <errno.h>
  29 #include <string.h>
  30 #include <glib.h>
  31
  32 #define STATIC_ITEMS      0
  33 #define STATIC_SUB_ITEMS  1
  34 #define BUFSIZE 256
  35
  36 #define LIST_ITEM_APPLY()   ((unsigned)command_list_length)
  37 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  38 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  39
  40 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  41 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  42
  43
  44 static list_window_t *lw = NULL;
  45 static unsigned command_list_length = 0;
  46 static command_definition_t *cmds = NULL;
  47
  48 static int subcmd = -1;
  49 static unsigned subcmd_length = 0;
  50 static unsigned subcmd_addpos = 0;
  51
  52 static int
  53 keybindings_changed(void)
  54 {
  55         command_definition_t *orginal_cmds = get_command_definitions();
  56         size_t size = command_list_length * sizeof(command_definition_t);
  57
  58         return memcmp(orginal_cmds, cmds, size);
  59 }
  60
  61 static void
  62 apply_keys(void)
  63 {
  64         if (keybindings_changed()) {
  65                 command_definition_t *orginal_cmds = get_command_definitions();
  66                 size_t size = command_list_length * sizeof(command_definition_t);
  67
  68                 memcpy(orginal_cmds, cmds, size);
  69                 screen_status_printf(_("You have new key bindings"));
  70         } else
  71                 screen_status_printf(_("Keybindings unchanged."));
  72 }
  73
  74 static int
  75 save_keys(void)
  76 {
  77         FILE *f;
  78         char *filename;
  79
  80         if (check_user_conf_dir()) {
  81                 screen_status_printf(_("Error: Unable to create directory ~/.ncmpc - %s"),
  82                                      strerror(errno));
  83                 screen_bell();
  84                 return -1;
  85         }
  86
  87         filename = get_user_key_binding_filename();
  88
  89         if ((f = fopen(filename,"w")) == NULL) {
  90                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  91                 screen_bell();
  92                 g_free(filename);
  93                 return -1;
  94         }
  95
  96         if (write_key_bindings(f, KEYDEF_WRITE_HEADER))
  97                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  98         else
  99                 screen_status_printf(_("Wrote %s"), filename);
 100
 101         g_free(filename);
 102         return fclose(f);
 103 }
 104
 105 static void
 106 check_subcmd_length(void)
 107 {
 108         subcmd_length = 0;
 109         while (subcmd_length < MAX_COMMAND_KEYS &&
 110                cmds[subcmd].keys[subcmd_length] > 0)
 111                 ++subcmd_length;
 112
 113         if (subcmd_length < MAX_COMMAND_KEYS) {
 114                 subcmd_addpos = subcmd_length;
 115                 subcmd_length++;
 116         } else
 117                 subcmd_addpos = 0;
 118         subcmd_length += STATIC_SUB_ITEMS;
 119 }
 120
 121 static void
 122 keydef_paint(void);
 123
 124 static void
 125 keydef_repaint(void)
 126 {
 127         keydef_paint();
 128         wrefresh(lw->w);
 129 }
 130
 131 static void
 132 delete_key(int cmd_index, int key_index)
 133 {
 134         int i = key_index+1;
 135
 136         screen_status_printf(_("Deleted"));
 137         while (i < MAX_COMMAND_KEYS && cmds[cmd_index].keys[i])
 138                 cmds[cmd_index].keys[key_index++] = cmds[cmd_index].keys[i++];
 139         cmds[cmd_index].keys[key_index] = 0;
 140         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 141         check_subcmd_length();
 142
 143         /* repaint */
 144         keydef_repaint();
 145
 146         /* update key conflict flags */
 147         check_key_bindings(cmds, NULL, 0);
 148 }
 149
 150 static void
 151 assign_new_key(int cmd_index, int key_index)
 152 {
 153         int key;
 154         char *buf;
 155         command_t cmd;
 156
 157         buf = g_strdup_printf(_("Enter new key for %s: "), cmds[cmd_index].name);
 158         key = screen_getch(buf);
 159         g_free(buf);
 160
 161         if (key==ERR) {
 162                 screen_status_printf(_("Aborted"));
 163                 return;
 164         }
 165
 166         cmd = find_key_command(key, cmds);
 167         if (cmd != CMD_NONE && cmd != cmds[cmd_index].command) {
 168                 screen_status_printf(_("Error: key %s is already used for %s"),
 169                                      key2str(key),
 170                                      get_key_command_name(cmd));
 171                 screen_bell();
 172                 return;
 173         }
 174
 175         cmds[cmd_index].keys[key_index] = key;
 176         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 177
 178         screen_status_printf(_("Assigned %s to %s"),
 179                              key2str(key),cmds[cmd_index].name);
 180         check_subcmd_length();
 181
 182         /* repaint */
 183         keydef_repaint();
 184
 185         /* update key conflict flags */
 186         check_key_bindings(cmds, NULL, 0);
 187 }
 188
 189 static const char *
 190 list_callback(unsigned idx, bool *highlight, G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
 191 {
 192         static char buf[BUFSIZE];
 193
 194         if (subcmd < 0) {
 195                 if (idx < (unsigned)command_list_length) {
 196                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 197                                 *highlight = true;
 198                         return cmds[idx].name;
 199                 } else if (idx == LIST_ITEM_APPLY())
 200                         return LIST_ITEM_APPLY_LABEL;
 201                 else if (idx == LIST_ITEM_SAVE())
 202                         return LIST_ITEM_SAVE_LABEL;
 203         } else {
 204                 if (idx == 0)
 205                         return "[..]";
 206                 idx--;
 207                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 208                         g_snprintf(buf,
 209                                    BUFSIZE, "%d. %-20s   (%d) ",
 210                                    idx + 1,
 211                                    key2str(cmds[subcmd].keys[idx]),
 212                                    cmds[subcmd].keys[idx]);
 213                         return buf;
 214                 } else if (idx == subcmd_addpos) {
 215                         g_snprintf(buf, BUFSIZE, "%d. %s",
 216                                    idx + 1, _("Add new key"));
 217                         return buf;
 218                 }
 219         }
 220
 221         return NULL;
 222 }
 223
 224 static void
 225 keydef_init(WINDOW *w, int cols, int rows)
 226 {
 227         lw = list_window_init(w, cols, rows);
 228 }
 229
 230 static void
 231 keydef_resize(int cols, int rows)
 232 {
 233         lw->cols = cols;
 234         lw->rows = rows;
 235 }
 236
 237 static void
 238 keydef_exit(void)
 239 {
 240         list_window_free(lw);
 241         if (cmds)
 242                 g_free(cmds);
 243         cmds = NULL;
 244         lw = NULL;
 245 }
 246
 247 static void
 248 keydef_open(G_GNUC_UNUSED struct mpdclient *c)
 249 {
 250         if (cmds == NULL) {
 251                 command_definition_t *current_cmds = get_command_definitions();
 252                 size_t cmds_size;
 253
 254                 command_list_length = 0;
 255                 while (current_cmds[command_list_length].name)
 256                         command_list_length++;
 257
 258                 cmds_size = (command_list_length+1) * sizeof(command_definition_t);
 259                 cmds = g_malloc0(cmds_size);
 260                 memcpy(cmds, current_cmds, cmds_size);
 261                 command_list_length += STATIC_ITEMS;
 262         }
 263
 264         subcmd = -1;
 265         list_window_check_selected(lw, LIST_LENGTH());
 266 }
 267
 268 static void
 269 keydef_close(void)
 270 {
 271         if (cmds && !keybindings_changed()) {
 272                 g_free(cmds);
 273                 cmds = NULL;
 274         } else
 275                 screen_status_printf(_("Note: Did you forget to \'Apply\' your changes?"));
 276 }
 277
 278 static const char *
 279 keydef_title(char *str, size_t size)
 280 {
 281         if (subcmd < 0)
 282                 return _("Edit key bindings");
 283
 284         g_snprintf(str, size, _("Edit keys for %s"), cmds[subcmd].name);
 285         return str;
 286 }
 287
 288 static void
 289 keydef_paint(void)
 290 {
 291         list_window_paint(lw, list_callback, NULL);
 292 }
 293
 294 static bool
 295 keydef_cmd(G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
 296 {
 297         int length = LIST_LENGTH();
 298
 299         if (subcmd >= 0)
 300                 length = subcmd_length;
 301
 302         if (cmd == CMD_LIST_RANGE_SELECT)
 303                 return false;
 304
 305         if (list_window_cmd(lw, length, cmd)) {
 306                 keydef_repaint();
 307                 return true;
 308         }
 309
 310         switch(cmd) {
 311         case CMD_PLAY:
 312                 if (subcmd < 0) {
 313                         if (lw->selected == LIST_ITEM_APPLY())
 314                                 apply_keys();
 315                         else if (lw->selected == LIST_ITEM_SAVE()) {
 316                                 apply_keys();
 317                                 save_keys();
 318                         } else {
 319                                 subcmd = lw->selected;
 320                                 lw->selected=0;
 321                                 lw->selected_start = lw->selected;
 322                                 lw->selected_end = lw->selected;
 323                                 check_subcmd_length();
 324
 325                                 keydef_repaint();
 326                         }
 327                 } else {
 328                         if (lw->selected == 0) { /* up */
 329                                 lw->selected = subcmd;
 330                                 lw->selected_start = lw->selected;
 331                                 lw->selected_end = lw->selected;
 332                                 subcmd = -1;
 333
 334                                 keydef_repaint();
 335                         } else
 336                                 assign_new_key(subcmd,
 337                                                lw->selected - STATIC_SUB_ITEMS);
 338                 }
 339                 return true;
 340         case CMD_GO_PARENT_DIRECTORY:
 341                 if (subcmd >=0) {
 342                         lw->selected = subcmd;
 343                         lw->selected_start = lw->selected;
 344                         lw->selected_end = lw->selected;
 345                         subcmd = -1;
 346
 347                         keydef_repaint();
 348                 }
 349                 break;
 350         case CMD_DELETE:
 351                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 352                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 353                 return true;
 354                 break;
 355         case CMD_SAVE_PLAYLIST:
 356                 apply_keys();
 357                 save_keys();
 358                 break;
 359         case CMD_LIST_FIND:
 360         case CMD_LIST_RFIND:
 361         case CMD_LIST_FIND_NEXT:
 362         case CMD_LIST_RFIND_NEXT:
 363                 screen_find(lw, length,
 364                             cmd, list_callback, NULL);
 365                 keydef_repaint();
 366                 return true;
 367
 368         default:
 369                 break;
 370         }
 371
 372         return false;
 373 }
 374
 375 const struct screen_functions screen_keydef = {
 376         .init = keydef_init,
 377         .exit = keydef_exit,
 378         .open = keydef_open,
 379         .close = keydef_close,
 380         .resize = keydef_resize,
 381         .paint = keydef_paint,
 382         .cmd = keydef_cmd,
 383         .get_title = keydef_title,
 384 };