src/command.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 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 "command.h"
  21 #include "i18n.h"
  22 #include "ncmpc_curses.h"
  23
  24 #include <assert.h>
  25 #include <ctype.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <ctype.h>
  29 #include <glib.h>
  30 #include <signal.h>
  31 #include <unistd.h>
  32
  33 #define KEY_CTL(x) ((x) & 0x1f) /* KEY_CTL(A) == ^A == \1 */
  34
  35 #define BS   KEY_BACKSPACE
  36 #define DEL  KEY_DC
  37 #define UP   KEY_UP
  38 #define DWN  KEY_DOWN
  39 #define LEFT KEY_LEFT
  40 #define RGHT KEY_RIGHT
  41 #define HOME KEY_HOME
  42 #define END  KEY_END
  43 #define PGDN KEY_NPAGE
  44 #define PGUP KEY_PPAGE
  45 #define TAB  0x09
  46 #define STAB 0x161
  47 #define ESC  0x1B
  48 #define RET  '\r'
  49 #define F1   KEY_F(1)
  50 #define F2   KEY_F(2)
  51 #define F3   KEY_F(3)
  52 #define F4   KEY_F(4)
  53 #define F5   KEY_F(5)
  54 #define F6   KEY_F(6)
  55 #define F7   KEY_F(7)
  56 #define F8   KEY_F(8)
  57 #define F9   KEY_F(9)
  58 #define C(x) KEY_CTL(x)
  59
  60 static command_definition_t cmds[] = {
  61 #ifdef ENABLE_KEYDEF_SCREEN
  62         { {'K', 0, 0 }, 0, CMD_SCREEN_KEYDEF, "screen-keyedit",
  63           N_("Key configuration screen") },
  64 #endif
  65         { { 'q', 'Q', C('C') }, 0, CMD_QUIT, "quit",
  66           N_("Quit") },
  67
  68         /* movement */
  69         { { UP, 'k', 0 }, 0, CMD_LIST_PREVIOUS, "up",
  70           N_("Move cursor up") },
  71         { { DWN, 'j', 0 }, 0, CMD_LIST_NEXT, "down",
  72           N_("Move cursor down") },
  73         { { 'H', 0, 0 }, 0, CMD_LIST_TOP, "top",
  74           N_("Move cursor to the top of screen") },
  75         { { 'M', 0, 0 }, 0, CMD_LIST_MIDDLE, "middle",
  76           N_("Move cursor to the middle of screen") },
  77         { { 'L', 0, 0 }, 0, CMD_LIST_BOTTOM, "bottom",
  78           N_("Move cursor to the bottom of screen") },
  79         { { HOME, C('A'), 0 }, 0, CMD_LIST_FIRST, "home",
  80           N_("Move cursor to the top of the list") },
  81         { { END, C('E'), 0 }, 0, CMD_LIST_LAST, "end",
  82           N_("Move cursor to the bottom of the list") },
  83         { { PGUP, 0, 0 }, 0, CMD_LIST_PREVIOUS_PAGE, "pgup",
  84           N_("Page up") },
  85         { { PGDN, 0, 0 }, 0, CMD_LIST_NEXT_PAGE, "pgdn",
  86           N_("Page down") },
  87         { { 'v',  0, 0 }, 0, CMD_LIST_RANGE_SELECT, "range-select",
  88           N_("Range selection") },
  89         { { C('N'),  0, 0 }, 0, CMD_LIST_SCROLL_DOWN_LINE, "scroll-down-line",
  90           N_("Scroll down one line") },
  91         { { C('B'),  0, 0 }, 0, CMD_LIST_SCROLL_UP_LINE, "scroll-up-line",
  92           N_("Scroll up one line") },
  93         { { 'N',  0, 0 }, 0, CMD_LIST_SCROLL_DOWN_HALF, "scroll-down-half",
  94           N_("Scroll up half a screen") },
  95         { { 'B',  0, 0 }, 0, CMD_LIST_SCROLL_UP_HALF, "scroll-up-half",
  96           N_("Scroll down half a screen") },
  97         { { 'l', 0, 0 }, 0, CMD_SELECT_PLAYING, "select-playing",
  98           N_("Select currently playing song") },
  99
 100
 101         /* basic screens */
 102         { { '1', F1, 'h' }, 0, CMD_SCREEN_HELP, "screen-help",
 103           N_("Help screen") },
 104         { { '2', F2, 0 }, 0, CMD_SCREEN_PLAY, "screen-playlist",
 105           N_("Queue screen") },
 106         { { '3', F3, 0 }, 0, CMD_SCREEN_FILE, "screen-browse",
 107           N_("Browse screen") },
 108
 109
 110         /* player commands */
 111         { { RET, 0, 0 }, 0, CMD_PLAY, "play",
 112           N_("Play/Enter directory") },
 113         { { 'P', 0, 0 }, 0, CMD_PAUSE,"pause",
 114           N_("Pause") },
 115         { { 's', BS, 0 }, 0, CMD_STOP, "stop",
 116           N_("Stop") },
 117         { { 'o', 0, 0 }, 0, CMD_CROP, "crop",
 118           N_("Crop") },
 119         { { '>', 0, 0 }, 0, CMD_TRACK_NEXT, "next",
 120           N_("Next track") },
 121         { { '<', 0, 0 }, 0, CMD_TRACK_PREVIOUS, "prev",
 122           N_("Previous track") },
 123         { { 'f', 0, 0 }, 0, CMD_SEEK_FORWARD, "seek-forward",
 124           N_("Seek forward") },
 125         { { 'b', 0, 0 }, 0, CMD_SEEK_BACKWARD, "seek-backward",
 126           N_("Seek backward") },
 127         { { '+', RGHT, 0 }, 0, CMD_VOLUME_UP, "volume-up",
 128           N_("Increase volume") },
 129         { { '-', LEFT, 0 }, 0, CMD_VOLUME_DOWN, "volume-down",
 130           N_("Decrease volume") },
 131         { { ' ', 0, 0 }, 0, CMD_SELECT, "select",
 132           N_("Select/deselect song in queue") },
 133         { { 't', 0, 0 }, 0, CMD_SELECT_ALL, "select_all",
 134           N_("Select all listed items") },
 135         { { DEL, 'd', 0 }, 0, CMD_DELETE, "delete",
 136           N_("Delete song from queue") },
 137         { { 'Z', 0, 0 }, 0, CMD_SHUFFLE, "shuffle",
 138           N_("Shuffle queue") },
 139         { { 'c', 0, 0 }, 0, CMD_CLEAR, "clear",
 140           N_("Clear queue") },
 141         { { 'r', 0, 0 }, 0, CMD_REPEAT, "repeat",
 142           N_("Toggle repeat mode") },
 143         { { 'z', 0, 0 }, 0, CMD_RANDOM, "random",
 144           N_("Toggle random mode") },
 145         { { 'y', 0, 0 }, 0, CMD_SINGLE, "single",
 146           N_("Toggle single mode") },
 147         { { 'C', 0, 0 }, 0, CMD_CONSUME, "consume",
 148           N_("Toggle consume mode") },
 149         { { 'x', 0, 0 }, 0, CMD_CROSSFADE, "crossfade",
 150           N_("Toggle crossfade mode") },
 151         { { C('U'), 0, 0 }, 0, CMD_DB_UPDATE, "db-update",
 152           N_("Start a music database update") },
 153         { { 'S', 0, 0 }, 0, CMD_SAVE_PLAYLIST, "save",
 154           N_("Save queue") },
 155         { { 'a', 0, 0 }, 0, CMD_ADD, "add",
 156           N_("Add url/file to queue") },
 157
 158         { { '!', 0, 0 }, 0, CMD_GO_ROOT_DIRECTORY, "go-root-directory",
 159           N_("Go to root directory") },
 160         { { '"', 0, 0 }, 0, CMD_GO_PARENT_DIRECTORY, "go-parent-directory",
 161           N_("Go to parent directory") },
 162
 163         { { 'G', 0, 0 }, 0, CMD_LOCATE, "locate",
 164           N_("Locate song in browser") },
 165
 166         /* lists */
 167         { { C('K'), 0, 0 }, 0, CMD_LIST_MOVE_UP, "move-up",
 168           N_("Move item up") },
 169         { { C('J'), 0, 0 }, 0, CMD_LIST_MOVE_DOWN, "move-down",
 170           N_("Move item down") },
 171         { { C('L'), 0, 0 }, 0, CMD_SCREEN_UPDATE, "update",
 172           N_("Refresh screen") },
 173
 174
 175         /* ncmpc options */
 176         { { 'w', 0, 0 }, 0, CMD_TOGGLE_FIND_WRAP, "wrap-mode",
 177           /* translators: toggle between wrapping and non-wrapping
 178              search */
 179           N_("Toggle find mode") },
 180         { { 'U', 0, 0 }, 0, CMD_TOGGLE_AUTOCENTER, "autocenter-mode",
 181           /* translators: the auto center mode always centers the song
 182              currently being played */
 183           N_("Toggle auto center mode") },
 184
 185
 186         /* change screen */
 187         { { TAB, 0, 0 }, 0, CMD_SCREEN_NEXT, "screen-next",
 188           N_("Next screen") },
 189         { { STAB, 0, 0 }, 0, CMD_SCREEN_PREVIOUS, "screen-prev",
 190           N_("Previous screen") },
 191         { { '`', 0, 0 }, 0, CMD_SCREEN_SWAP, "screen-swap",
 192           N_("Swap to most recent screen") },
 193
 194
 195         /* find */
 196         { { '/', 0, 0 }, 0, CMD_LIST_FIND, "find",
 197           N_("Forward find") },
 198         { { 'n', 0, 0 }, 0, CMD_LIST_FIND_NEXT, "find-next",
 199           N_("Forward find next") },
 200         { { '?', 0, 0 }, 0, CMD_LIST_RFIND, "rfind",
 201           N_("Backward find") },
 202         { { 'p', 0, 0 }, 0, CMD_LIST_RFIND_NEXT, "rfind-next",
 203           N_("Backward find previous") },
 204         { { '.', 0, 0 }, 0, CMD_LIST_JUMP, "jump",
 205                 /* translators: this queries the user for a string
 206                  * and jumps directly (while the user is typing)
 207                  * to the entry which begins with this string */
 208           N_("Jump to") },
 209
 210
 211         /* extra screens */
 212 #ifdef ENABLE_ARTIST_SCREEN
 213         { {'4', F4, 0 }, 0, CMD_SCREEN_ARTIST, "screen-artist",
 214           N_("Artist screen") },
 215 #endif
 216 #ifdef ENABLE_SEARCH_SCREEN
 217         { {'5', F5, 0 }, 0, CMD_SCREEN_SEARCH, "screen-search",
 218           N_("Search screen") },
 219         { {'m', 0, 0 }, 0, CMD_SEARCH_MODE, "search-mode",
 220           N_("Change search mode") },
 221 #endif
 222 #ifdef ENABLE_SONG_SCREEN
 223         { { 'i', 0, 0 }, 0, CMD_SCREEN_SONG, "view",
 224           N_("View the selected and the currently playing song") },
 225 #endif
 226 #ifdef ENABLE_LYRICS_SCREEN
 227         { {'7', F7, 0 }, 0, CMD_SCREEN_LYRICS, "screen-lyrics",
 228           N_("Lyrics screen") },
 229         { {ESC, 0, 0 }, 0, CMD_INTERRUPT, "lyrics-interrupt",
 230           /* translators: interrupt the current background action,
 231              e.g. stop loading lyrics from the internet */
 232           N_("Interrupt action") },
 233         { {'u', 0, 0 }, 0, CMD_LYRICS_UPDATE, "lyrics-update",
 234           N_("Update Lyrics") },
 235         /* this command may move out of #ifdef ENABLE_LYRICS_SCREEN
 236            at some point */
 237         { {'e', 0, 0 }, 0, CMD_EDIT, "edit",
 238           N_("Edit the current item") },
 239 #endif
 240
 241 #ifdef ENABLE_OUTPUTS_SCREEN
 242         { {'8', F8, 0 }, 0, CMD_SCREEN_OUTPUTS, "screen-outputs",
 243           N_("Outputs screen") },
 244 #endif
 245
 246 #ifdef ENABLE_CHAT_SCREEN
 247         { {'9', F9, 0}, 0, CMD_SCREEN_CHAT, "screen-chat",
 248           N_("Chat screen") },
 249 #endif
 250
 251         { { -1, -1, -1 }, 0, CMD_NONE, NULL, NULL }
 252 };
 253
 254 #ifdef ENABLE_KEYDEF_SCREEN
 255 command_definition_t *
 256 get_command_definitions(void)
 257 {
 258         return cmds;
 259 }
 260
 261 size_t
 262 get_cmds_max_name_width(command_definition_t *c)
 263 {
 264         static size_t max = 0;
 265
 266         if (max != 0)
 267                 return max;
 268
 269         for (command_definition_t *p = c; p->name != NULL; p++) {
 270                 /*
 271                  * width and length are considered the same here, as command
 272                  * names are not translated.
 273                  */
 274                 size_t len = strlen(p->name);
 275                 if (len > max)
 276                         max = len;
 277         }
 278
 279         return max;
 280 }
 281 #endif
 282
 283 const char *
 284 key2str(int key)
 285 {
 286         switch(key) {
 287                 static char buf[32];
 288
 289         case 0:
 290                 return _("Undefined");
 291         case ' ':
 292                 return _("Space");
 293         case RET:
 294                 return _("Enter");
 295         case BS:
 296                 return _("Backspace");
 297         case DEL:
 298                 return _("Delete");
 299         case UP:
 300                 return _("Up");
 301         case DWN:
 302                 return _("Down");
 303         case LEFT:
 304                 return _("Left");
 305         case RGHT:
 306                 return _("Right");
 307         case HOME:
 308                 return _("Home");
 309         case END:
 310                 return _("End");
 311         case PGDN:
 312                 return _("PageDown");
 313         case PGUP:
 314                 return _("PageUp");
 315         case TAB:
 316                 return _("Tab");
 317         case STAB:
 318                 return _("Shift+Tab");
 319         case ESC:
 320                 return _("Esc");
 321         case KEY_IC:
 322                 return _("Insert");
 323         default:
 324                 for (int i = 0; i <= 63; i++)
 325                         if (key == KEY_F(i)) {
 326                                 g_snprintf(buf, 32, _("F%d"), i );
 327                                 return buf;
 328                         }
 329                 if (!(key & ~037))
 330                         g_snprintf(buf, 32, _("Ctrl-%c"), 'A'+(key & 037)-1 );
 331                 else if ((key & ~037) == 224)
 332                         g_snprintf(buf, 32, _("Alt-%c"), 'A'+(key & 037)-1 );
 333                 else if (key > 32 && key < 256)
 334                         g_snprintf(buf, 32, "%c", key);
 335                 else
 336                         g_snprintf(buf, 32, "0x%03X", key);
 337                 return buf;
 338         }
 339 }
 340
 341 void
 342 command_dump_keys(void)
 343 {
 344         for (size_t i = 0; cmds[i].description; i++)
 345                 if (cmds[i].command != CMD_NONE)
 346                         printf(" %20s : %s\n",
 347                                get_key_names(cmds[i].command, true),
 348                                cmds[i].name);
 349 }
 350
 351 #ifndef NCMPC_MINI
 352
 353 static void
 354 set_key_flags(command_definition_t *cp, command_t command, int flags)
 355 {
 356         for (size_t i = 0; cp[i].name; i++) {
 357                 if (cp[i].command == command) {
 358                         cp[i].flags |= flags;
 359                         break;
 360                 }
 361         }
 362 }
 363
 364 #endif
 365
 366 const char *
 367 get_key_names(command_t command, bool all)
 368 {
 369         for (int i = 0; cmds[i].description; i++) {
 370                 if (cmds[i].command == command) {
 371                         static char keystr[80];
 372
 373                         g_strlcpy(keystr, key2str(cmds[i].keys[0]), sizeof(keystr));
 374                         if (!all)
 375                                 return keystr;
 376
 377                         for (unsigned j = 1; j < MAX_COMMAND_KEYS &&
 378                                         cmds[i].keys[j] > 0; j++) {
 379                                 g_strlcat(keystr, " ", sizeof(keystr));
 380                                 g_strlcat(keystr, key2str(cmds[i].keys[j]), sizeof(keystr));
 381                         }
 382                         return keystr;
 383                 }
 384         }
 385         return NULL;
 386 }
 387
 388 const char *
 389 get_key_description(command_t command)
 390 {
 391         for (size_t i = 0; cmds[i].description; i++)
 392                 if (cmds[i].command == command)
 393                         return _(cmds[i].description);
 394
 395         return NULL;
 396 }
 397
 398 const char *
 399 get_key_command_name(command_t command)
 400 {
 401         for (size_t i = 0; cmds[i].name; i++)
 402                 if (cmds[i].command == command)
 403                         return cmds[i].name;
 404
 405         return NULL;
 406 }
 407
 408 command_t
 409 get_key_command_from_name(const char *name)
 410 {
 411         for (size_t i = 0; cmds[i].name; i++)
 412                 if (strcmp(name, cmds[i].name) == 0)
 413                         return cmds[i].command;
 414
 415         return CMD_NONE;
 416 }
 417
 418 command_t
 419 find_key_command(int key, const command_definition_t *c)
 420 {
 421         assert(key != 0);
 422         assert(c != NULL);
 423
 424         for (size_t i = 0; c[i].name; i++) {
 425                 for (int j = 0; j < MAX_COMMAND_KEYS; j++)
 426                         if (c[i].keys[j] == key)
 427                                 return c[i].command;
 428         }
 429
 430         return CMD_NONE;
 431 }
 432
 433 command_t
 434 get_key_command(int key)
 435 {
 436         return find_key_command(key, cmds);
 437 }
 438
 439 bool
 440 assign_keys(command_t command, int keys[MAX_COMMAND_KEYS])
 441 {
 442         for (size_t i = 0; cmds[i].name; i++) {
 443                 if (cmds[i].command == command) {
 444                         memcpy(cmds[i].keys, keys, sizeof(int)*MAX_COMMAND_KEYS);
 445 #ifndef NCMPC_MINI
 446                         cmds[i].flags |= COMMAND_KEY_MODIFIED;
 447 #endif
 448                         return true;
 449                 }
 450         }
 451
 452         return false;
 453 }
 454
 455 #ifndef NCMPC_MINI
 456
 457 bool
 458 check_key_bindings(command_definition_t *cp, char *buf, size_t bufsize)
 459 {
 460         bool success = true;
 461
 462         if (cp == NULL)
 463                 cp = cmds;
 464
 465         for (size_t i = 0; cp[i].name; i++)
 466                 cp[i].flags &= ~COMMAND_KEY_CONFLICT;
 467
 468         for (size_t i = 0; cp[i].name; i++) {
 469                 int j;
 470                 command_t cmd;
 471
 472                 for(j=0; j<MAX_COMMAND_KEYS; j++) {
 473                         if (cp[i].keys[j] &&
 474                             (cmd = find_key_command(cp[i].keys[j],cp)) != cp[i].command) {
 475                                 if (buf) {
 476                                         g_snprintf(buf, bufsize,
 477                                                    _("Key %s assigned to %s and %s"),
 478                                                    key2str(cp[i].keys[j]),
 479                                                    get_key_command_name(cp[i].command),
 480                                                    get_key_command_name(cmd));
 481                                 } else {
 482                                         fprintf(stderr,
 483                                                 _("Key %s assigned to %s and %s"),
 484                                                 key2str(cp[i].keys[j]),
 485                                                 get_key_command_name(cp[i].command),
 486                                                 get_key_command_name(cmd));
 487                                         fputc('\n', stderr);
 488                                 }
 489                                 cp[i].flags |= COMMAND_KEY_CONFLICT;
 490                                 set_key_flags(cp, cmd, COMMAND_KEY_CONFLICT);
 491                                 success = false;
 492                         }
 493                 }
 494         }
 495
 496         return success;
 497 }
 498
 499 bool
 500 write_key_bindings(FILE *f, int flags)
 501 {
 502         if (flags & KEYDEF_WRITE_HEADER)
 503                 fprintf(f, "## Key bindings for ncmpc (generated by ncmpc)\n\n");
 504
 505         for (size_t i = 0; cmds[i].name && !ferror(f); i++) {
 506                 if (cmds[i].flags & COMMAND_KEY_MODIFIED ||
 507                     flags & KEYDEF_WRITE_ALL) {
 508                         fprintf(f, "## %s\n", cmds[i].description);
 509                         if (flags & KEYDEF_COMMENT_ALL)
 510                                 fprintf(f, "#");
 511                         fprintf(f, "key %s = ", cmds[i].name);
 512                         for (int j = 0; j < MAX_COMMAND_KEYS; j++) {
 513                                 if (j && cmds[i].keys[j])
 514                                         fprintf(f, ",  ");
 515                                 if (!j || cmds[i].keys[j]) {
 516                                         if (cmds[i].keys[j]<256 && (isalpha(cmds[i].keys[j]) ||
 517                                                                     isdigit(cmds[i].keys[j])))
 518                                                 fprintf(f, "\'%c\'", cmds[i].keys[j]);
 519                                         else
 520                                                 fprintf(f, "%d", cmds[i].keys[j]);
 521                                 }
 522                         }
 523                         fprintf(f,"\n\n");
 524                 }
 525         }
 526
 527         return ferror(f) == 0;
 528 }
 529
 530 #endif /* NCMPC_MINI */