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
  32 #include <errno.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <glib.h>
  36 #include <ncurses.h>
  37
  38 #define STATIC_ITEMS      0
  39 #define STATIC_SUB_ITEMS  1
  40 #define BUFSIZE 256
  41
  42 #define LIST_ITEM_APPLY()   (command_list_length)
  43 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  44 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  45
  46 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  47 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  48
  49
  50 static list_window_t *lw = NULL;
  51 static int command_list_length = 0;
  52 static command_definition_t *cmds = NULL;
  53
  54 static int subcmd = -1;
  55 static int subcmd_length = 0;
  56 static int subcmd_addpos = 0;
  57
  58 static int
  59 keybindings_changed(void)
  60 {
  61   command_definition_t *orginal_cmds = get_command_definitions();
  62   size_t size = command_list_length*sizeof(command_definition_t);
  63
  64   return memcmp(orginal_cmds, cmds, size);
  65 }
  66
  67 static void
  68 apply_keys(void)
  69 {
  70   if( keybindings_changed() )
  71     {
  72       command_definition_t *orginal_cmds = get_command_definitions();
  73       size_t size = command_list_length*sizeof(command_definition_t);
  74
  75       memcpy(orginal_cmds, cmds, size);
  76       screen_status_printf(_("You have new key bindings!"));
  77     }
  78   else
  79     screen_status_printf(_("Keybindings unchanged."));
  80 }
  81
  82 static int
  83 save_keys(void)
  84 {
  85   FILE *f;
  86   char *filename;
  87
  88   if( check_user_conf_dir() )
  89     {
  90       screen_status_printf(_("Error: Unable to create direcory ~/.ncmpc - %s"),
  91                            strerror(errno));
  92       screen_bell();
  93       return -1;
  94     }
  95
  96   filename = get_user_key_binding_filename();
  97
  98   if( (f=fopen(filename,"w")) == NULL )
  99     {
 100       screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
 101       screen_bell();
 102       g_free(filename);
 103       return -1;
 104     }
 105   if( write_key_bindings(f, KEYDEF_WRITE_HEADER) )
 106     screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
 107   else
 108     screen_status_printf(_("Wrote %s"), filename);
 109
 110   g_free(filename);
 111   return fclose(f);
 112 }
 113
 114 static void
 115 check_subcmd_length(void)
 116 {
 117   subcmd_length = 0;
 118   while( subcmd_length<MAX_COMMAND_KEYS && cmds[subcmd].keys[subcmd_length]>0 )
 119    subcmd_length ++;
 120
 121   if( subcmd_length<MAX_COMMAND_KEYS )
 122     {
 123       subcmd_addpos = subcmd_length;
 124       subcmd_length++;
 125     }
 126   else
 127     subcmd_addpos = 0;
 128   subcmd_length += STATIC_SUB_ITEMS;
 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   lw->clear = 1;
 143   lw->repaint = 1;
 144   /* update key conflict flags */
 145   check_key_bindings(cmds, NULL, 0);
 146 }
 147
 148 static void
 149 assign_new_key(WINDOW *w, int cmd_index, int key_index)
 150 {
 151   int key;
 152   char *buf;
 153   command_t cmd;
 154
 155   buf = g_strdup_printf(_("Enter new key for %s: "), cmds[cmd_index].name);
 156   key = screen_getch(w, buf);
 157   g_free(buf);
 158   if( key==KEY_RESIZE )
 159     screen_resize();
 160   if( key==ERR )
 161     {
 162       screen_status_printf(_("Aborted!"));
 163       return;
 164     }
 165   cmd = find_key_command(key, cmds);
 166   if( cmd!=CMD_NONE && cmd!= cmds[cmd_index].command )
 167     {
 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   cmds[cmd_index].keys[key_index] = key;
 175   cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 176
 177   screen_status_printf(_("Assigned %s to %s"),
 178                        key2str(key),cmds[cmd_index].name);
 179   check_subcmd_length();
 180   lw->repaint = 1;
 181   /* update key conflict flags */
 182   check_key_bindings(cmds, NULL, 0);
 183 }
 184
 185 static const char *
 186 list_callback(int idx, int *highlight, void *data)
 187 {
 188         static char buf[BUFSIZE];
 189
 190         *highlight = 0;
 191         if (subcmd < 0) {
 192                 if (idx < 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(screen_t *screen, 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(screen_t *screen, 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(screen_t *screen, 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, 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 >= 0)
 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 static list_window_t *
 365 keydef_lw(void)
 366 {
 367   return lw;
 368 }
 369
 370 screen_functions_t *
 371 get_screen_keydef(void)
 372 {
 373   static screen_functions_t functions;
 374
 375   memset(&functions, 0, sizeof(screen_functions_t));
 376   functions.init   = keydef_init;
 377   functions.exit   = keydef_exit;
 378   functions.open   = keydef_open;
 379   functions.close  = keydef_close;
 380   functions.resize = keydef_resize;
 381   functions.paint  = keydef_paint;
 382   functions.update = keydef_update;
 383   functions.cmd    = keydef_cmd;
 384   functions.get_lw = keydef_lw;
 385   functions.get_title = keydef_title;
 386
 387   return &functions;
 388 }
 389
 390
 391 #endif