src/screen_keydef.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "screen_keydef.h"
  21 #include "screen_interface.h"
  22 #include "screen_message.h"
  23 #include "screen_find.h"
  24 #include "i18n.h"
  25 #include "conf.h"
  26 #include "screen.h"
  27 #include "screen_utils.h"
  28
  29 #include <errno.h>
  30 #include <string.h>
  31 #include <glib.h>
  32
  33 #define STATIC_ITEMS      0
  34 #define STATIC_SUB_ITEMS  1
  35 #define BUFSIZE 256
  36
  37 #define LIST_ITEM_APPLY()   ((unsigned)command_list_length)
  38 #define LIST_ITEM_SAVE()    (LIST_ITEM_APPLY()+1)
  39 #define LIST_LENGTH()       (LIST_ITEM_SAVE()+1)
  40
  41 #define LIST_ITEM_SAVE_LABEL  _("===> Apply & Save key bindings  ")
  42 #define LIST_ITEM_APPLY_LABEL _("===> Apply key bindings ")
  43
  44
  45 static struct list_window *lw;
  46 static unsigned command_list_length = 0;
  47 static command_definition_t *cmds = NULL;
  48
  49 static int subcmd = -1;
  50 static unsigned subcmd_length = 0;
  51 static unsigned subcmd_addpos = 0;
  52
  53 static int
  54 keybindings_changed(void)
  55 {
  56         command_definition_t *orginal_cmds = get_command_definitions();
  57         size_t size = command_list_length * sizeof(command_definition_t);
  58
  59         return memcmp(orginal_cmds, cmds, size);
  60 }
  61
  62 static void
  63 apply_keys(void)
  64 {
  65         if (keybindings_changed()) {
  66                 command_definition_t *orginal_cmds = get_command_definitions();
  67                 size_t size = command_list_length * sizeof(command_definition_t);
  68
  69                 memcpy(orginal_cmds, cmds, size);
  70                 screen_status_printf(_("You have new key bindings"));
  71         } else
  72                 screen_status_printf(_("Keybindings unchanged."));
  73 }
  74
  75 static int
  76 save_keys(void)
  77 {
  78         FILE *f;
  79         char *filename;
  80
  81         if (check_user_conf_dir()) {
  82                 screen_status_printf(_("Error: Unable to create directory ~/.ncmpc - %s"),
  83                                      strerror(errno));
  84                 screen_bell();
  85                 return -1;
  86         }
  87
  88         filename = get_user_key_binding_filename();
  89
  90         if ((f = fopen(filename,"w")) == NULL) {
  91                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  92                 screen_bell();
  93                 g_free(filename);
  94                 return -1;
  95         }
  96
  97         if (write_key_bindings(f, KEYDEF_WRITE_HEADER))
  98                 screen_status_printf(_("Error: %s - %s"), filename, strerror(errno));
  99         else
 100                 screen_status_printf(_("Wrote %s"), filename);
 101
 102         g_free(filename);
 103         return fclose(f);
 104 }
 105
 106 static void
 107 check_subcmd_length(void)
 108 {
 109         subcmd_length = 0;
 110         while (subcmd_length < MAX_COMMAND_KEYS &&
 111                cmds[subcmd].keys[subcmd_length] > 0)
 112                 ++subcmd_length;
 113
 114         if (subcmd_length < MAX_COMMAND_KEYS) {
 115                 subcmd_addpos = subcmd_length;
 116                 subcmd_length++;
 117         } else
 118                 subcmd_addpos = 0;
 119         subcmd_length += STATIC_SUB_ITEMS;
 120         list_window_set_length(lw, subcmd_length);
 121 }
 122
 123 static void
 124 keydef_paint(void);
 125
 126 static void
 127 keydef_repaint(void)
 128 {
 129         keydef_paint();
 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(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(buf);
 161         g_free(buf);
 162
 163         if (key==ERR) {
 164                 screen_status_printf(_("Aborted"));
 165                 return;
 166         }
 167
 168         cmd = find_key_command(key, cmds);
 169         if (cmd != CMD_NONE && cmd != cmds[cmd_index].command) {
 170                 screen_status_printf(_("Error: key %s is already used for %s"),
 171                                      key2str(key),
 172                                      get_key_command_name(cmd));
 173                 screen_bell();
 174                 return;
 175         }
 176
 177         cmds[cmd_index].keys[key_index] = key;
 178         cmds[cmd_index].flags |= COMMAND_KEY_MODIFIED;
 179
 180         screen_status_printf(_("Assigned %s to %s"),
 181                              key2str(key),cmds[cmd_index].name);
 182         check_subcmd_length();
 183
 184         /* repaint */
 185         keydef_repaint();
 186
 187         /* update key conflict flags */
 188         check_key_bindings(cmds, NULL, 0);
 189 }
 190
 191 static const char *
 192 list_callback(unsigned idx, bool *highlight, G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
 193 {
 194         static char buf[BUFSIZE];
 195
 196         if (subcmd < 0) {
 197                 if (idx < (unsigned)command_list_length) {
 198                         if (cmds[idx].flags & COMMAND_KEY_CONFLICT)
 199                                 *highlight = true;
 200                         return cmds[idx].name;
 201                 } else if (idx == LIST_ITEM_APPLY())
 202                         return LIST_ITEM_APPLY_LABEL;
 203                 else if (idx == LIST_ITEM_SAVE())
 204                         return LIST_ITEM_SAVE_LABEL;
 205         } else {
 206                 if (idx == 0)
 207                         return "[..]";
 208                 idx--;
 209                 if (idx < MAX_COMMAND_KEYS && cmds[subcmd].keys[idx] > 0) {
 210                         g_snprintf(buf,
 211                                    BUFSIZE, "%d. %-20s   (%d) ",
 212                                    idx + 1,
 213                                    key2str(cmds[subcmd].keys[idx]),
 214                                    cmds[subcmd].keys[idx]);
 215                         return buf;
 216                 } else if (idx == subcmd_addpos) {
 217                         g_snprintf(buf, BUFSIZE, "%d. %s",
 218                                    idx + 1, _("Add new key"));
 219                         return buf;
 220                 }
 221         }
 222
 223         return NULL;
 224 }
 225
 226 static void
 227 keydef_init(WINDOW *w, int cols, int rows)
 228 {
 229         lw = list_window_init(w, cols, rows);
 230 }
 231
 232 static void
 233 keydef_resize(int cols, int rows)
 234 {
 235         lw->cols = cols;
 236         lw->rows = rows;
 237 }
 238
 239 static void
 240 keydef_exit(void)
 241 {
 242         list_window_free(lw);
 243         if (cmds)
 244                 g_free(cmds);
 245         cmds = NULL;
 246         lw = NULL;
 247 }
 248
 249 static void
 250 keydef_open(G_GNUC_UNUSED struct mpdclient *c)
 251 {
 252         if (cmds == NULL) {
 253                 command_definition_t *current_cmds = get_command_definitions();
 254                 size_t cmds_size;
 255
 256                 command_list_length = 0;
 257                 while (current_cmds[command_list_length].name)
 258                         command_list_length++;
 259
 260                 cmds_size = (command_list_length+1) * sizeof(command_definition_t);
 261                 cmds = g_malloc0(cmds_size);
 262                 memcpy(cmds, current_cmds, cmds_size);
 263                 command_list_length += STATIC_ITEMS;
 264         }
 265
 266         subcmd = -1;
 267         list_window_set_length(lw, LIST_LENGTH());
 268 }
 269
 270 static void
 271 keydef_close(void)
 272 {
 273         if (cmds && !keybindings_changed()) {
 274                 g_free(cmds);
 275                 cmds = NULL;
 276         } else
 277                 screen_status_printf(_("Note: Did you forget to \'Apply\' your changes?"));
 278 }
 279
 280 static const char *
 281 keydef_title(char *str, size_t size)
 282 {
 283         if (subcmd < 0)
 284                 return _("Edit key bindings");
 285
 286         g_snprintf(str, size, _("Edit keys for %s"), cmds[subcmd].name);
 287         return str;
 288 }
 289
 290 static void
 291 keydef_paint(void)
 292 {
 293         list_window_paint(lw, list_callback, NULL);
 294 }
 295
 296 static bool
 297 keydef_cmd(G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
 298 {
 299         if (cmd == CMD_LIST_RANGE_SELECT)
 300                 return false;
 301
 302         if (list_window_cmd(lw, cmd)) {
 303                 keydef_repaint();
 304                 return true;
 305         }
 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                                 list_window_reset(lw);
 318                                 check_subcmd_length();
 319
 320                                 keydef_repaint();
 321                         }
 322                 } else {
 323                         if (lw->selected == 0) { /* up */
 324                                 list_window_set_length(lw, LIST_LENGTH());
 325                                 list_window_set_cursor(lw, subcmd);
 326                                 subcmd = -1;
 327
 328                                 keydef_repaint();
 329                         } else
 330                                 assign_new_key(subcmd,
 331                                                lw->selected - STATIC_SUB_ITEMS);
 332                 }
 333                 return true;
 334         case CMD_GO_PARENT_DIRECTORY:
 335                 if (subcmd >=0) {
 336                         list_window_set_length(lw, LIST_LENGTH());
 337                         list_window_set_cursor(lw, subcmd);
 338                         subcmd = -1;
 339
 340                         keydef_repaint();
 341                 }
 342                 break;
 343         case CMD_DELETE:
 344                 if (subcmd >= 0 && lw->selected >= STATIC_SUB_ITEMS)
 345                         delete_key(subcmd, lw->selected - STATIC_SUB_ITEMS);
 346                 return true;
 347                 break;
 348         case CMD_SAVE_PLAYLIST:
 349                 apply_keys();
 350                 save_keys();
 351                 break;
 352         case CMD_LIST_FIND:
 353         case CMD_LIST_RFIND:
 354         case CMD_LIST_FIND_NEXT:
 355         case CMD_LIST_RFIND_NEXT:
 356                 screen_find(lw, cmd, list_callback, NULL);
 357                 keydef_repaint();
 358                 return true;
 359
 360         default:
 361                 break;
 362         }
 363
 364         return false;
 365 }
 366
 367 const struct screen_functions screen_keydef = {
 368         .init = keydef_init,
 369         .exit = keydef_exit,
 370         .open = keydef_open,
 371         .close = keydef_close,
 372         .resize = keydef_resize,
 373         .paint = keydef_paint,
 374         .cmd = keydef_cmd,
 375         .get_title = keydef_title,
 376 };