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