src/screen_keydef.c

   1 /*
   2  * $Id$
   3  *
   4  * (c) 2004 by Kalle Wallin <kaw@linux.se>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include "config.h"
  22
  23 #ifndef  DISABLE_KEYDEF_SCREEN
  24 #include "ncmpc.h"
  25 #include "mpdclient.h"
  26 #include "options.h"
  27 #include "conf.h"
  28 #include "command.h"
  29 #include "screen.h"
  30 #include "screen_utils.h"
  31 #include "gcc.h"
  32
  33 #include <errno.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <glib.h>
  37 #include <ncurses.h>
  38
  39 #define STATIC_ITEMS      0
  40 #define STATIC_SUB_ITEMS  1
  41 #define BUFSIZE 256
  42
  43 #define LIST_ITEM_APPLY()   ((unsigned)command_list_length)
  44 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  45 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  46
  47 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  48 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  49
  50
  51 static list_window_t *lw = NULL;
  52 static unsigned command_list_length = 0;
  53 static command_definition_t *cmds = NULL;
  54
  55 static int subcmd = -1;
  56 static unsigned subcmd_length = 0;
  57 static unsigned subcmd_addpos = 0;
  58
  59 static int
  60 keybindings_changed(void)
  61 {
  62   command_definition_t *orginal_cmds = get_command_definitions();
  63   size_t size = command_list_length*sizeof(command_definition_t);
  64
  65   return memcmp(orginal_cmds, cmds, size);
  66 }
  67
  68 static void
  69 apply_keys(void)
  70 {
  71   if( keybindings_changed() )
  72     {
  73       command_definition_t *orginal_cmds = get_command_definitions();
  74       size_t size = command_list_length*sizeof(command_definition_t);
  75
  76       memcpy(orginal_cmds, cmds, size);
  77       screen_status_printf(_("You have new key bindings!"));
  78     }
  79   else
  80     screen_status_printf(_("Keybindings unchanged."));
  81 }
  82
  83 static int
  84 save_keys(void)
  85 {
  86   FILE *f;
  87   char *filename;
  88
  89   if( check_user_conf_dir() )
  90     {
  91       screen_status_printf(_("Error: Unable to create direcory ~/.ncmpc - %s"),
  92                            strerror(errno));
  93       screen_bell();
  94       return -1;
  95     }
  96
  97   filename = get_user_key_binding_filename();
  98
  99   if( (f=fopen(filename,"w")) == NULL )
 100     {
 101       screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
 102       screen_bell();
 103       g_free(filename);
 104       return -1;
 105     }
 106   if( write_key_bindings(f, KEYDEF_WRITE_HEADER) )
 107     screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
 108   else
 109     screen_status_printf(_("Wrote %s"), filename);
 110
 111   g_free(filename);
 112   return fclose(f);
 113 }
 114
 115 static void
 116 check_subcmd_length(void)
 117 {
 118   subcmd_length = 0;
 119   while( subcmd_length<MAX_COMMAND_KEYS && cmds[subcmd].keys[subcmd_length]>0 )
 120    subcmd_length ++;
 121
 122   if( subcmd_length<MAX_COMMAND_KEYS )
 123     {
 124       subcmd_addpos = subcmd_length;
 125       subcmd_length++;
 126     }
 127   else
 128     subcmd_addpos = 0;
 129   subcmd_length += STATIC_SUB_ITEMS;
 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   lw->clear = 1;
 144   lw->repaint = 1;
 145   /* update key conflict flags */
 146   check_key_bindings(cmds, NULL, 0);
 147 }
 148
 149 static void
 150 assign_new_key(WINDOW *w, 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(w, buf);
 158   g_free(buf);
 159   if( key==KEY_RESIZE )
 160     screen_resize();
 161   if( key==ERR )
 162     {
 163       screen_status_printf(_("Aborted!"));
 164       return;
 165     }
 166   cmd = find_key_command(key, cmds);
 167   if( cmd!=CMD_NONE && cmd!= cmds[cmd_index].command )
 168     {
 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   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   lw->repaint = 1;
 182   /* update key conflict flags */
 183   check_key_bindings(cmds, NULL, 0);
 184 }
 185
 186 static const char *
 187 list_callback(unsigned idx, int *highlight, mpd_unused void *data)
 188 {
 189         static char buf[BUFSIZE];
 190
 191         if (subcmd < 0) {
 192                 if (idx < (unsigned)command_list_length) {
 193                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 194                                 *highlight = 1;
 195                         return cmds[idx].name;
 196                 } else if (idx == LIST_ITEM_APPLY())
 197                         return LIST_ITEM_APPLY_LABEL;
 198                 else if (idx == LIST_ITEM_SAVE())
 199                         return LIST_ITEM_SAVE_LABEL;
 200         } else {
 201                 if (idx == 0)
 202                         return "[..]";
 203                 idx--;
 204                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 205                         g_snprintf(buf,
 206                                    BUFSIZE, "%d. %-20s   (%d) ",
 207                                    idx + 1,
 208                                    key2str(cmds[subcmd].keys[idx]),
 209                                    cmds[subcmd].keys[idx]);
 210                         return buf;
 211                 } else if (idx == subcmd_addpos) {
 212                         g_snprintf(buf, BUFSIZE, _("%d. Add new key "), idx + 1);
 213                         return buf;
 214                 }
 215         }
 216
 217         return NULL;
 218 }
 219
 220 static void
 221 keydef_init(WINDOW *w, int cols, int rows)
 222 {
 223   lw = list_window_init(w, cols, rows);
 224 }
 225
 226 static void
 227 keydef_resize(int cols, int rows)
 228 {
 229   lw->cols = cols;
 230   lw->rows = rows;
 231 }
 232
 233 static void
 234 keydef_exit(void)
 235 {
 236   list_window_free(lw);
 237   if( cmds )
 238     g_free(cmds);
 239   cmds = NULL;
 240   lw = NULL;
 241 }
 242
 243 static void
 244 keydef_open(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 245 {
 246   if( cmds == NULL )
 247     {
 248       command_definition_t *current_cmds = get_command_definitions();
 249       size_t cmds_size;
 250
 251       command_list_length = 0;
 252       while( current_cmds[command_list_length].name )
 253         command_list_length++;
 254
 255       cmds_size = (command_list_length+1)*sizeof(command_definition_t);
 256       cmds = g_malloc0(cmds_size);
 257       memcpy(cmds, current_cmds, cmds_size);
 258       command_list_length += STATIC_ITEMS;
 259       screen_status_printf(_("Welcome to the key editor!"));
 260     }
 261
 262   subcmd = -1;
 263   list_window_check_selected(lw, LIST_LENGTH());
 264 }
 265
 266 static void
 267 keydef_close(void)
 268 {
 269   if( cmds && !keybindings_changed() )
 270     {
 271       g_free(cmds);
 272       cmds = NULL;
 273     }
 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(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 290 {
 291   lw->clear = 1;
 292   list_window_paint(lw, list_callback, NULL);
 293   wrefresh(lw->w);
 294 }
 295
 296 static void
 297 keydef_update(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 298 {
 299   if( lw->repaint )
 300     {
 301       list_window_paint(lw, list_callback, NULL);
 302       wrefresh(lw->w);
 303       lw->repaint = 0;
 304     }
 305 }
 306
 307 static int
 308 keydef_cmd(screen_t *screen, mpd_unused mpdclient_t *c, command_t cmd)
 309 {
 310         int length = LIST_LENGTH();
 311
 312         if (subcmd >= 0)
 313                 length = subcmd_length;
 314
 315         switch(cmd) {
 316         case CMD_PLAY:
 317                 if( subcmd<0 ) {
 318                         if( lw->selected == LIST_ITEM_APPLY() )
 319                                 apply_keys();
 320                         else if( lw->selected == LIST_ITEM_SAVE() ) {
 321                                 apply_keys();
 322                                 save_keys();
 323                         } else {
 324                                 subcmd = lw->selected;
 325                                 lw->selected=0;
 326                                 check_subcmd_length();
 327                         }
 328                 } else {
 329                         if (lw->selected == 0) { /* up */
 330                                 lw->selected = subcmd;
 331                                 subcmd = -1;
 332                         } else
 333                                 assign_new_key(screen->status_window.w,
 334                                                subcmd,
 335                                                lw->selected-STATIC_SUB_ITEMS);
 336                 }
 337                 lw->repaint = 1;
 338                 lw->clear = 1;
 339                 return 1;
 340         case CMD_DELETE:
 341                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 342                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 343                 return 1;
 344                 break;
 345         case CMD_SAVE_PLAYLIST:
 346                 apply_keys();
 347                 save_keys();
 348                 break;
 349         case CMD_LIST_FIND:
 350         case CMD_LIST_RFIND:
 351         case CMD_LIST_FIND_NEXT:
 352         case CMD_LIST_RFIND_NEXT:
 353                 return screen_find(screen,
 354                                    lw,  length,
 355                                    cmd, list_callback, NULL);
 356
 357         default:
 358                 break;
 359         }
 360
 361         return list_window_cmd(lw, length, cmd);
 362 }
 363
 364 const struct screen_functions screen_keydef = {
 365         .init = keydef_init,
 366         .exit = keydef_exit,
 367         .open = keydef_open,
 368         .close = keydef_close,
 369         .resize = keydef_resize,
 370         .paint = keydef_paint,
 371         .update = keydef_update,
 372         .cmd = keydef_cmd,
 373         .get_title = keydef_title,
 374 };
 375
 376 #endif