src/screen_keydef.c

   1 /*
   2  * (c) 2004 by Kalle Wallin <kaw@linux.se>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  *
  17  */
  18
  19 #include "ncmpc.h"
  20 #include "mpdclient.h"
  21 #include "options.h"
  22 #include "conf.h"
  23 #include "command.h"
  24 #include "screen.h"
  25 #include "screen_utils.h"
  26 #include "gcc.h"
  27
  28 #include <errno.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <glib.h>
  32 #include <ncurses.h>
  33
  34 #define STATIC_ITEMS      0
  35 #define STATIC_SUB_ITEMS  1
  36 #define BUFSIZE 256
  37
  38 #define LIST_ITEM_APPLY()   ((unsigned)command_list_length)
  39 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  40 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  41
  42 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  43 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  44
  45
  46 static list_window_t *lw = NULL;
  47 static unsigned command_list_length = 0;
  48 static command_definition_t *cmds = NULL;
  49
  50 static int subcmd = -1;
  51 static unsigned subcmd_length = 0;
  52 static unsigned subcmd_addpos = 0;
  53
  54 static int
  55 keybindings_changed(void)
  56 {
  57         command_definition_t *orginal_cmds = get_command_definitions();
  58         size_t size = command_list_length * sizeof(command_definition_t);
  59
  60         return memcmp(orginal_cmds, cmds, size);
  61 }
  62
  63 static void
  64 apply_keys(void)
  65 {
  66         if (keybindings_changed()) {
  67                 command_definition_t *orginal_cmds = get_command_definitions();
  68                 size_t size = command_list_length * sizeof(command_definition_t);
  69
  70                 memcpy(orginal_cmds, cmds, size);
  71                 screen_status_printf(_("You have new key bindings!"));
  72         } else
  73                 screen_status_printf(_("Keybindings unchanged."));
  74 }
  75
  76 static int
  77 save_keys(void)
  78 {
  79         FILE *f;
  80         char *filename;
  81
  82         if (check_user_conf_dir()) {
  83                 screen_status_printf(_("Error: Unable to create direcory ~/.ncmpc - %s"),
  84                                      strerror(errno));
  85                 screen_bell();
  86                 return -1;
  87         }
  88
  89         filename = get_user_key_binding_filename();
  90
  91         if ((f = fopen(filename,"w")) == NULL) {
  92                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  93                 screen_bell();
  94                 g_free(filename);
  95                 return -1;
  96         }
  97
  98         if (write_key_bindings(f, KEYDEF_WRITE_HEADER))
  99                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
 100         else
 101                 screen_status_printf(_("Wrote %s"), filename);
 102
 103         g_free(filename);
 104         return fclose(f);
 105 }
 106
 107 static void
 108 check_subcmd_length(void)
 109 {
 110         subcmd_length = 0;
 111         while (subcmd_length < MAX_COMMAND_KEYS &&
 112                cmds[subcmd].keys[subcmd_length] > 0)
 113                 ++subcmd_length;
 114
 115         if (subcmd_length < MAX_COMMAND_KEYS) {
 116                 subcmd_addpos = subcmd_length;
 117                 subcmd_length++;
 118         } else
 119                 subcmd_addpos = 0;
 120         subcmd_length += STATIC_SUB_ITEMS;
 121 }
 122
 123 static void
 124 keydef_paint(mpdclient_t *c);
 125
 126 static void
 127 keydef_repaint(void)
 128 {
 129         keydef_paint(NULL);
 130         wrefresh(lw->w);
 131 }
 132
 133 static void
 134 delete_key(int cmd_index, int key_index)
 135 {
 136         int i = key_index+1;
 137
 138         screen_status_printf(_("Deleted"));
 139         while (i < MAX_COMMAND_KEYS && cmds[cmd_index].keys[i])
 140                 cmds[cmd_index].keys[key_index++] = cmds[cmd_index].keys[i++];
 141         cmds[cmd_index].keys[key_index] = 0;
 142         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 143         check_subcmd_length();
 144
 145         /* repaint */
 146         keydef_repaint();
 147
 148         /* update key conflict flags */
 149         check_key_bindings(cmds, NULL, 0);
 150 }
 151
 152 static void
 153 assign_new_key(WINDOW *w, int cmd_index, int key_index)
 154 {
 155         int key;
 156         char *buf;
 157         command_t cmd;
 158
 159         buf = g_strdup_printf(_("Enter new key for %s: "), cmds[cmd_index].name);
 160         key = screen_getch(w, buf);
 161         g_free(buf);
 162
 163         if (key == KEY_RESIZE)
 164                 screen_resize();
 165
 166         if (key==ERR) {
 167                 screen_status_printf(_("Aborted!"));
 168                 return;
 169         }
 170
 171         cmd = find_key_command(key, cmds);
 172         if (cmd != CMD_NONE && cmd != cmds[cmd_index].command) {
 173                 screen_status_printf(_("Error: key %s is already used for %s"),
 174                                      key2str(key),
 175                                      get_key_command_name(cmd));
 176                 screen_bell();
 177                 return;
 178         }
 179
 180         cmds[cmd_index].keys[key_index] = key;
 181         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 182
 183         screen_status_printf(_("Assigned %s to %s"),
 184                              key2str(key),cmds[cmd_index].name);
 185         check_subcmd_length();
 186
 187         /* repaint */
 188         keydef_repaint();
 189
 190         /* update key conflict flags */
 191         check_key_bindings(cmds, NULL, 0);
 192 }
 193
 194 static const char *
 195 list_callback(unsigned idx, int *highlight, mpd_unused void *data)
 196 {
 197         static char buf[BUFSIZE];
 198
 199         if (subcmd < 0) {
 200                 if (idx < (unsigned)command_list_length) {
 201                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 202                                 *highlight = 1;
 203                         return cmds[idx].name;
 204                 } else if (idx == LIST_ITEM_APPLY())
 205                         return LIST_ITEM_APPLY_LABEL;
 206                 else if (idx == LIST_ITEM_SAVE())
 207                         return LIST_ITEM_SAVE_LABEL;
 208         } else {
 209                 if (idx == 0)
 210                         return "[..]";
 211                 idx--;
 212                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 213                         g_snprintf(buf,
 214                                    BUFSIZE, "%d. %-20s   (%d) ",
 215                                    idx + 1,
 216                                    key2str(cmds[subcmd].keys[idx]),
 217                                    cmds[subcmd].keys[idx]);
 218                         return buf;
 219                 } else if (idx == subcmd_addpos) {
 220                         g_snprintf(buf, BUFSIZE, _("%d. Add new key "), idx + 1);
 221                         return buf;
 222                 }
 223         }
 224
 225         return NULL;
 226 }
 227
 228 static void
 229 keydef_init(WINDOW *w, int cols, int rows)
 230 {
 231         lw = list_window_init(w, cols, rows);
 232 }
 233
 234 static void
 235 keydef_resize(int cols, int rows)
 236 {
 237         lw->cols = cols;
 238         lw->rows = rows;
 239 }
 240
 241 static void
 242 keydef_exit(void)
 243 {
 244         list_window_free(lw);
 245         if (cmds)
 246                 g_free(cmds);
 247         cmds = NULL;
 248         lw = NULL;
 249 }
 250
 251 static void
 252 keydef_open(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 253 {
 254         if (cmds == NULL) {
 255                 command_definition_t *current_cmds = get_command_definitions();
 256                 size_t cmds_size;
 257
 258                 command_list_length = 0;
 259                 while (current_cmds[command_list_length].name)
 260                         command_list_length++;
 261
 262                 cmds_size = (command_list_length+1) * sizeof(command_definition_t);
 263                 cmds = g_malloc0(cmds_size);
 264                 memcpy(cmds, current_cmds, cmds_size);
 265                 command_list_length += STATIC_ITEMS;
 266                 screen_status_printf(_("Welcome to the key editor!"));
 267         }
 268
 269         subcmd = -1;
 270         list_window_check_selected(lw, LIST_LENGTH());
 271 }
 272
 273 static void
 274 keydef_close(void)
 275 {
 276         if (cmds && !keybindings_changed()) {
 277                 g_free(cmds);
 278                 cmds = NULL;
 279         } else
 280                 screen_status_printf(_("Note: Did you forget to \'Apply\' your changes?"));
 281 }
 282
 283 static const char *
 284 keydef_title(char *str, size_t size)
 285 {
 286         if (subcmd < 0)
 287                 return _("Edit key bindings");
 288
 289         g_snprintf(str, size, _("Edit keys for %s"), cmds[subcmd].name);
 290         return str;
 291 }
 292
 293 static void
 294 keydef_paint(mpd_unused mpdclient_t *c)
 295 {
 296         list_window_paint(lw, list_callback, NULL);
 297 }
 298
 299 static int
 300 keydef_cmd(screen_t *screen, mpd_unused mpdclient_t *c, command_t cmd)
 301 {
 302         int length = LIST_LENGTH();
 303
 304         if (subcmd >= 0)
 305                 length = subcmd_length;
 306
 307         if (list_window_cmd(lw, length, cmd)) {
 308                 keydef_repaint();
 309                 return 1;
 310         }
 311
 312         switch(cmd) {
 313         case CMD_PLAY:
 314                 if (subcmd < 0) {
 315                         if (lw->selected == LIST_ITEM_APPLY())
 316                                 apply_keys();
 317                         else if (lw->selected == LIST_ITEM_SAVE()) {
 318                                 apply_keys();
 319                                 save_keys();
 320                         } else {
 321                                 subcmd = lw->selected;
 322                                 lw->selected=0;
 323                                 check_subcmd_length();
 324
 325                                 keydef_repaint();
 326                         }
 327                 } else {
 328                         if (lw->selected == 0) { /* up */
 329                                 lw->selected = subcmd;
 330                                 subcmd = -1;
 331
 332                                 keydef_repaint();
 333                         } else
 334                                 assign_new_key(screen->status_window.w,
 335                                                subcmd,
 336                                                lw->selected - STATIC_SUB_ITEMS);
 337                 }
 338                 return 1;
 339         case CMD_DELETE:
 340                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 341                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 342                 return 1;
 343                 break;
 344         case CMD_SAVE_PLAYLIST:
 345                 apply_keys();
 346                 save_keys();
 347                 break;
 348         case CMD_LIST_FIND:
 349         case CMD_LIST_RFIND:
 350         case CMD_LIST_FIND_NEXT:
 351         case CMD_LIST_RFIND_NEXT:
 352                 screen_find(screen,
 353                             lw, length,
 354                             cmd, list_callback, NULL);
 355                 keydef_repaint();
 356                 return 1;
 357
 358         default:
 359                 break;
 360         }
 361
 362         return 0;
 363 }
 364
 365 const struct screen_functions screen_keydef = {
 366         .init = keydef_init,
 367         .exit = keydef_exit,
 368         .open = keydef_open,
 369         .close = keydef_close,
 370         .resize = keydef_resize,
 371         .paint = keydef_paint,
 372         .cmd = keydef_cmd,
 373         .get_title = keydef_title,
 374 };