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->clear = 1;
 138         lw->repaint = 1;
 139         /* update key conflict flags */
 140         check_key_bindings(cmds, NULL, 0);
 141 }
 142
 143 static void
 144 assign_new_key(WINDOW *w, int cmd_index, int key_index)
 145 {
 146         int key;
 147         char *buf;
 148         command_t cmd;
 149
 150         buf = g_strdup_printf(_("Enter new key for %s: "), cmds[cmd_index].name);
 151         key = screen_getch(w, buf);
 152         g_free(buf);
 153
 154         if (key == KEY_RESIZE)
 155                 screen_resize();
 156
 157         if (key==ERR) {
 158                 screen_status_printf(_("Aborted!"));
 159                 return;
 160         }
 161
 162         cmd = find_key_command(key, cmds);
 163         if (cmd != CMD_NONE && cmd != cmds[cmd_index].command) {
 164                 screen_status_printf(_("Error: key %s is already used for %s"),
 165                                      key2str(key),
 166                                      get_key_command_name(cmd));
 167                 screen_bell();
 168                 return;
 169         }
 170
 171         cmds[cmd_index].keys[key_index] = key;
 172         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 173
 174         screen_status_printf(_("Assigned %s to %s"),
 175                              key2str(key),cmds[cmd_index].name);
 176         check_subcmd_length();
 177         lw->repaint = 1;
 178         /* update key conflict flags */
 179         check_key_bindings(cmds, NULL, 0);
 180 }
 181
 182 static const char *
 183 list_callback(unsigned idx, int *highlight, mpd_unused void *data)
 184 {
 185         static char buf[BUFSIZE];
 186
 187         if (subcmd < 0) {
 188                 if (idx < (unsigned)command_list_length) {
 189                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 190                                 *highlight = 1;
 191                         return cmds[idx].name;
 192                 } else if (idx == LIST_ITEM_APPLY())
 193                         return LIST_ITEM_APPLY_LABEL;
 194                 else if (idx == LIST_ITEM_SAVE())
 195                         return LIST_ITEM_SAVE_LABEL;
 196         } else {
 197                 if (idx == 0)
 198                         return "[..]";
 199                 idx--;
 200                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 201                         g_snprintf(buf,
 202                                    BUFSIZE, "%d. %-20s   (%d) ",
 203                                    idx + 1,
 204                                    key2str(cmds[subcmd].keys[idx]),
 205                                    cmds[subcmd].keys[idx]);
 206                         return buf;
 207                 } else if (idx == subcmd_addpos) {
 208                         g_snprintf(buf, BUFSIZE, _("%d. Add new key "), idx + 1);
 209                         return buf;
 210                 }
 211         }
 212
 213         return NULL;
 214 }
 215
 216 static void
 217 keydef_init(WINDOW *w, int cols, int rows)
 218 {
 219         lw = list_window_init(w, cols, rows);
 220 }
 221
 222 static void
 223 keydef_resize(int cols, int rows)
 224 {
 225         lw->cols = cols;
 226         lw->rows = rows;
 227 }
 228
 229 static void
 230 keydef_exit(void)
 231 {
 232         list_window_free(lw);
 233         if (cmds)
 234                 g_free(cmds);
 235         cmds = NULL;
 236         lw = NULL;
 237 }
 238
 239 static void
 240 keydef_open(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 241 {
 242         if (cmds == NULL) {
 243                 command_definition_t *current_cmds = get_command_definitions();
 244                 size_t cmds_size;
 245
 246                 command_list_length = 0;
 247                 while (current_cmds[command_list_length].name)
 248                         command_list_length++;
 249
 250                 cmds_size = (command_list_length+1) * sizeof(command_definition_t);
 251                 cmds = g_malloc0(cmds_size);
 252                 memcpy(cmds, current_cmds, cmds_size);
 253                 command_list_length += STATIC_ITEMS;
 254                 screen_status_printf(_("Welcome to the key editor!"));
 255         }
 256
 257         subcmd = -1;
 258         list_window_check_selected(lw, LIST_LENGTH());
 259 }
 260
 261 static void
 262 keydef_close(void)
 263 {
 264         if (cmds && !keybindings_changed()) {
 265                 g_free(cmds);
 266                 cmds = NULL;
 267         } else
 268                 screen_status_printf(_("Note: Did you forget to \'Apply\' your changes?"));
 269 }
 270
 271 static const char *
 272 keydef_title(char *str, size_t size)
 273 {
 274         if (subcmd < 0)
 275                 return _("Edit key bindings");
 276
 277         g_snprintf(str, size, _("Edit keys for %s"), cmds[subcmd].name);
 278         return str;
 279 }
 280
 281 static void
 282 keydef_paint(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 283 {
 284         lw->clear = 1;
 285         list_window_paint(lw, list_callback, NULL);
 286         wrefresh(lw->w);
 287 }
 288
 289 static void
 290 keydef_update(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 291 {
 292         if (lw->repaint) {
 293                 list_window_paint(lw, list_callback, NULL);
 294                 wrefresh(lw->w);
 295                 lw->repaint = 0;
 296         }
 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         switch(cmd) {
 308         case CMD_PLAY:
 309                 if (subcmd < 0) {
 310                         if (lw->selected == LIST_ITEM_APPLY())
 311                                 apply_keys();
 312                         else if (lw->selected == LIST_ITEM_SAVE()) {
 313                                 apply_keys();
 314                                 save_keys();
 315                         } else {
 316                                 subcmd = lw->selected;
 317                                 lw->selected=0;
 318                                 check_subcmd_length();
 319                         }
 320                 } else {
 321                         if (lw->selected == 0) { /* up */
 322                                 lw->selected = subcmd;
 323                                 subcmd = -1;
 324                         } else
 325                                 assign_new_key(screen->status_window.w,
 326                                                subcmd,
 327                                                lw->selected - STATIC_SUB_ITEMS);
 328                 }
 329                 lw->repaint = 1;
 330                 lw->clear = 1;
 331                 return 1;
 332         case CMD_DELETE:
 333                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 334                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 335                 return 1;
 336                 break;
 337         case CMD_SAVE_PLAYLIST:
 338                 apply_keys();
 339                 save_keys();
 340                 break;
 341         case CMD_LIST_FIND:
 342         case CMD_LIST_RFIND:
 343         case CMD_LIST_FIND_NEXT:
 344         case CMD_LIST_RFIND_NEXT:
 345                 return screen_find(screen,
 346                                    lw,  length,
 347                                    cmd, list_callback, NULL);
 348
 349         default:
 350                 break;
 351         }
 352
 353         return list_window_cmd(lw, length, cmd);
 354 }
 355
 356 const struct screen_functions screen_keydef = {
 357         .init = keydef_init,
 358         .exit = keydef_exit,
 359         .open = keydef_open,
 360         .close = keydef_close,
 361         .resize = keydef_resize,
 362         .paint = keydef_paint,
 363         .update = keydef_update,
 364         .cmd = keydef_cmd,
 365         .get_title = keydef_title,
 366 };
 367
 368 #endif