path: root/src/command.c

/* 
 * $Id$
 *
 * (c) 2004 by Kalle Wallin <kaw@linux.se>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "command.h"
#include "config.h"
#include "ncmpc.h"
#include "mpdclient.h"
#include "screen.h"

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <glib.h>
#include <signal.h>
#include <unistd.h>

#undef DEBUG_KEYS

#ifdef DEBUG_KEYS
#define DK(x) x
#else
#define DK(x)
#endif

#define BS   KEY_BACKSPACE
#define DEL  KEY_DC
#define UP   KEY_UP
#define DWN  KEY_DOWN
#define LEFT KEY_LEFT
#define RGHT KEY_RIGHT
#define HOME KEY_HOME
#define END  KEY_END
#define PGDN KEY_NPAGE
#define PGUP KEY_PPAGE
#define TAB  0x09
#define STAB 0x161
#define ESC  0x1B
#define F1   KEY_F(1)
#define F2   KEY_F(2)
#define F3   KEY_F(3)
#define F4   KEY_F(4)
#define F5   KEY_F(5)
#define F6   KEY_F(6)
#define F7   KEY_F(7)


static command_definition_t cmds[] =
{
#ifdef ENABLE_KEYDEF_SCREEN
  { {'K',   0,   0 }, 0, CMD_SCREEN_KEYDEF,    "screen-keyedit",
    N_("Key configuration screen") },
#endif
  { { 'q', 'Q',  3 }, 0, CMD_QUIT,   "quit",
    N_("Quit") },  

  /* movment */
  { {  UP,  'k',   0 }, 0, CMD_LIST_PREVIOUS,      "up",
    N_("Move cursor up") },
  { { DWN,  'j',   0 }, 0, CMD_LIST_NEXT,          "down",
    N_("Move cursor down") },
  { { HOME, 0x01, 0 }, 0, CMD_LIST_FIRST,          "home",
    N_("Home ") },
  { { END,  0x05, 0 }, 0, CMD_LIST_LAST,           "end",
    N_("End ") },
  { { PGUP,   0,   0 }, 0, CMD_LIST_PREVIOUS_PAGE, "pgup",
    N_("Page up") },
  { { PGDN,   0,   0 }, 0, CMD_LIST_NEXT_PAGE,     "pgdn", 
    N_("Page down") },


  /* basic screens */
  { { '1', F1, 'h' }, 0, CMD_SCREEN_HELP,      "screen-help",
    N_("Help screen") },
  { { '2', F2,  0 }, 0, CMD_SCREEN_PLAY,      "screen-playlist",
    N_("Playlist screen") },
  { { '3', F3,  0 }, 0, CMD_SCREEN_FILE,      "screen-browse",
    N_("Browse screen") },


  /* player commands */
  { {  13,   0,   0 }, 0, CMD_PLAY, "play",  
    N_("Play/Enter directory") },
  { { 'P',   0,   0 }, 0, CMD_PAUSE,"pause", 
    N_("Pause") },
  { { 's',  BS,   0 }, 0, CMD_STOP, "stop",   
    N_("Stop") },
  { { '>',   0,   0 }, 0, CMD_TRACK_NEXT, "next", 
    N_("Next track") },
  { { '<',   0,   0 }, 0, CMD_TRACK_PREVIOUS, "prev", 
    N_("Previous track") },
  { { 'f',   0,   0 }, 0, CMD_SEEK_FORWARD, "seek-forward", 
    N_("Seek forward") },
  { { 'b',   0,   0 }, 0, CMD_SEEK_BACKWARD, "seek-backward", 
    N_("Seek backward") },
  { { '+', RGHT,  0 }, 0, CMD_VOLUME_UP, "volume-up", 
    N_("Increase volume") },
  { { '-', LEFT,  0 }, 0, CMD_VOLUME_DOWN, "volume-down", 
    N_("Decrease volume") },
  { { ' ',   0,   0 }, 0, CMD_SELECT, "select", 
    N_("Select/deselect song in playlist") },
  { { 't',   0,   0 }, 0, CMD_SELECT_ALL, "select_all",
    N_("Select all listed items") },
  { { DEL,  'd',  0 }, 0, CMD_DELETE, "delete",
    N_("Delete song from playlist") },
  { { 'Z',   0,   0 }, 0, CMD_SHUFFLE, "shuffle",
    N_("Shuffle playlist") },
  { { 'c',   0,   0 }, 0, CMD_CLEAR, "clear",
    N_("Clear playlist") },
  { { 'r',   0,   0 }, 0, CMD_REPEAT, "repeat",
    N_("Toggle repeat mode") },
  { { 'z',   0,   0 }, 0, CMD_RANDOM, "random",
    N_("Toggle random mode") },
  { { 'x',   0,   0 }, 0, CMD_CROSSFADE, "crossfade",
    N_("Toggle crossfade mode") },
  { { 21,    0,   0 }, 0, CMD_DB_UPDATE,  "db-update",
    N_("Start a music database update") },
  { { 'S',   0,   0 }, 0, CMD_SAVE_PLAYLIST, "save",
    N_("Save playlist") },
  { { 'a',   0,   0 }, 0, CMD_ADD, "add",
    N_("Add url/file to playlist") },

  { { '!',   0,   0 }, 0, CMD_GO_ROOT_DIRECTORY, "go-root-directory",
    N_("Go to root directory") },
  { { '"',   0,   0 }, 0, CMD_GO_PARENT_DIRECTORY, "go-parent-directory",
    N_("Go to parent directory") },

  /* lists */
  { { 11,  0,   0 }, 0, CMD_LIST_MOVE_UP,     "move-up", 
    N_("Move item up") },
  { { 10,  0,   0 }, 0, CMD_LIST_MOVE_DOWN,   "move-down", 
    N_("Move item down") },
  { { 12,  0,   0 }, 0, CMD_SCREEN_UPDATE,    "update",
    N_("Update screen") },


  /* ncmpc options */
  { { 'w',   0,   0 }, 0, CMD_TOGGLE_FIND_WRAP,  "wrap-mode", 
    N_("Toggle find mode") },
  { { 'U',   0,   0 }, 0, CMD_TOGGLE_AUTOCENTER, "autocenter-mode", 
    N_("Toggle auto center mode") },


  /* change screen */
  { { TAB,   0,   0 }, 0, CMD_SCREEN_NEXT,     "screen-next",
    N_("Next screen") },
  { { STAB,  0,   0 }, 0, CMD_SCREEN_PREVIOUS, "screen-prev",
    N_("Previous screen") },

 
  /* find */
  { { '/',   0,   0 }, 0, CMD_LIST_FIND,           "find",
    N_("Forward find") },
  { { 'n',   0,   0 }, 0, CMD_LIST_FIND_NEXT,      "find-next",
    N_("Forward find next") },
  { { '?',   0,   0 }, 0, CMD_LIST_RFIND,          "rfind",
    N_("Backward find") },
  { { 'p',   0,   0 }, 0, CMD_LIST_RFIND_NEXT,     "rfind-next",
    N_("Backward find previous") },


  /* extra screens */
#ifdef ENABLE_ARTIST_SCREEN
  { {'4',  F4,   0 }, 0, CMD_SCREEN_ARTIST,    "screen-artist",
    N_("Artist screen") },
#endif
#ifdef ENABLE_SEARCH_SCREEN
  { {'5',  F5,   0 }, 0, CMD_SCREEN_SEARCH,    "screen-search",
    N_("Search screen") },
  { {'m',   0,   0 }, 0, CMD_SEARCH_MODE,      "search-mode",
    N_("Change search mode") },
#endif

#ifdef ENABLE_LYRICS_SCREEN
  { {'7',  F7,   0 }, 0, CMD_SCREEN_LYRICS,    "screen-lyrics",
    N_("Lyrics screen") },
  { {ESC,  0,   0 }, 0, CMD_INTERRUPT,    "lyrics-interrupt",
    N_("Interrupt action") },
  { {'u',  0,   0 }, 0, CMD_LYRICS_UPDATE,    "lyrics-update",
    N_("Update Lyrics") },
#endif


  { { -1,  -1,  -1 }, 0, CMD_NONE, NULL, NULL }
};

command_definition_t *
get_command_definitions(void)
{
	return cmds;
}

const char *
key2str(int key)
{
	static char buf[32];
	int i;

	buf[0] = 0;
	switch(key) {
	case 0:
		return _("Undefined");
	case ' ':
		return _("Space");
	case 13:
		return _("Enter");
	case BS:
		return _("Backspace");
	case DEL:
		return _("Delete");
	case UP:
		return _("Up");
	case DWN:
		return _("Down");
	case LEFT:
		return _("Left");
	case RGHT:
		return _("Right");
	case HOME:
		return _("Home");
	case END:
		return _("End");
	case PGDN:
		return _("PageDown");
	case PGUP:
		return _("PageUp");
	case TAB:
		return _("Tab");
	case STAB:
		return _("Shift+Tab");
	case ESC:
		return _("Esc");
	case KEY_IC:
		return _("Insert");
	default:
		for (i = 0; i <= 63; i++)
			if (key == KEY_F(i)) {
				g_snprintf(buf, 32, "F%d", i );
				return buf;
			}
		if (!(key & ~037))
			g_snprintf(buf, 32, "Ctrl-%c", 'A'+(key & 037)-1 );
		else if ((key & ~037) == 224)
			g_snprintf(buf, 32, "Alt-%c", 'A'+(key & 037)-1 );
		else if (key > 32 && key < 256)
			g_snprintf(buf, 32, "%c", key);
		else
			g_snprintf(buf, 32, "0x%03X", key);
	}

	return buf;
}

void
command_dump_keys(void)
{
	int i;

	i = 0;
	while (cmds[i].description) {
		if (cmds[i].command != CMD_NONE)
			printf(" %20s : %s\n", get_key_names(cmds[i].command,1),cmds[i].name);
		i++;
	}
}

static int
set_key_flags(command_definition_t *cp, command_t command, int flags)
{
	int i;

	i = 0;
	while (cp[i].name) {
		if (cp[i].command == command) {
			cp[i].flags |= flags;
			return 0;
		}
		i++;
	}

	return 1;
}

const char *
get_key_names(command_t command, int all)
{
  int i;

  i=0;
  while (cmds[i].description) {
	  if (cmds[i].command == command) {
		  int j;
		  static char keystr[80];

		  g_strlcpy(keystr, key2str(cmds[i].keys[0]), sizeof(keystr));
		  if (!all)
			  return keystr;
		  j=1;
		  while (j < MAX_COMMAND_KEYS && cmds[i].keys[j] > 0) {
			  g_strlcat(keystr, " ", sizeof(keystr));
			  g_strlcat(keystr, key2str(cmds[i].keys[j]), sizeof(keystr));
			  j++;
		  }
		  return keystr;
	  }
	  i++;
  }
  return NULL;
}

const char *
get_key_description(command_t command)
{
	int i;

	i=0;
	while (cmds[i].description) {
		if (cmds[i].command == command)
			return _(cmds[i].description);
		i++;
	}

	return NULL;
}

const char *
get_key_command_name(command_t command)
{
	int i;

	i=0;
	while (cmds[i].name) {
		if (cmds[i].command == command)
			return cmds[i].name;
		i++;
	}
	return NULL;
}

command_t
get_key_command_from_name(char *name)
{
	int i;

	i=0;
	while (cmds[i].name) {
		if (strcmp(name, cmds[i].name) == 0)
			return cmds[i].command;
		i++;
	}

	return CMD_NONE;
}

command_t
find_key_command(int key, command_definition_t *c)
{
	int i;

	i=0;
	while (key && c && c[i].name) {
		if (c[i].keys[0] == key ||
		    c[i].keys[1] == key ||
		    c[i].keys[2] == key)
			return c[i].command;
		i++;
	}

	return CMD_NONE;
}

command_t
get_key_command(int key)
{
	return find_key_command(key, cmds);
}

int
my_wgetch(WINDOW *w)
{
	int c;

	c = wgetch(w);

	/* handle resize event */
	if (c == KEY_RESIZE)
		screen_resize();

#ifdef ENABLE_RAW_MODE
	/* handle SIGSTOP (Ctrl-Z) */
	if (c == 26 || c == 407)
		sigstop();
	/* handle SIGINT (Ctrl-C) */
	if (c == 3)
		kill(getpid(), SIGTERM);
#endif

	return c;
}

command_t
get_keyboard_command(void)
{
	int key;

	key = my_wgetch(stdscr);
	if (key == ERR)
		return CMD_NONE;

#ifdef HAVE_GETMOUSE
	if (key == KEY_MOUSE)
		return CMD_MOUSE_EVENT;
#endif

	return get_key_command(key);
}

int
assign_keys(command_t command, int keys[MAX_COMMAND_KEYS])
{
	int i;

	i=0;
	while (cmds[i].name) {
		if (cmds[i].command == command) {
			memcpy(cmds[i].keys, keys, sizeof(int)*MAX_COMMAND_KEYS);
			cmds[i].flags |= COMMAND_KEY_MODIFIED;
			return 0;
		}
		i++;
	}
	return -1;
}

int
check_key_bindings(command_definition_t *cp, char *buf, size_t bufsize)
{
	int i;
	int retval = 0;

	if (cp == NULL)
		cp = cmds;

	i=0;
	while (cp[i].name) {
		cp[i].flags &= ~COMMAND_KEY_CONFLICT;
		i++;
	}

	i=0;
	while (cp[i].name) {
		int j;
		command_t cmd;

		for(j=0; j<MAX_COMMAND_KEYS; j++)
			if (cp[i].keys[j] &&
			    (cmd = find_key_command(cp[i].keys[j],cp)) != cp[i].command) {
				if (buf) {
#ifdef ENABLE_KEYDEF_SCREEN
					g_snprintf(buf, bufsize,
						   _("Key %s assigned to %s and %s (press %s for the key editor)"),
						   key2str(cp[i].keys[j]),
						   get_key_command_name(cp[i].command),
						   get_key_command_name(cmd),
						   get_key_names(CMD_SCREEN_KEYDEF,0));
#else
					g_snprintf(buf, bufsize,
						   _("Error: Key %s assigned to %s and %s !!!\n"),
						   key2str(cp[i].keys[j]),
						   get_key_command_name(cp[i].command),
						   get_key_command_name(cmd));
#endif
				} else
					fprintf(stderr,
						_("Error: Key %s assigned to %s and %s !!!\n"),
						key2str(cp[i].keys[j]),
						get_key_command_name(cp[i].command),
						get_key_command_name(cmd));
				cp[i].flags |= COMMAND_KEY_CONFLICT;
				set_key_flags(cp, cmd, COMMAND_KEY_CONFLICT);
				retval = -1;
			}
		i++;
	}
	return retval;
}

int
write_key_bindings(FILE *f, int flags)
{
	int i,j;

	if( flags & KEYDEF_WRITE_HEADER )
		fprintf(f, "## Key bindings for ncmpc (generated by ncmpc)\n\n");

	i=0;
	while (cmds[i].name && !ferror(f)) {
		if (cmds[i].flags & COMMAND_KEY_MODIFIED ||
		    flags & KEYDEF_WRITE_ALL) {
			fprintf(f, "## %s\n", cmds[i].description);
			if (flags & KEYDEF_COMMENT_ALL)
				fprintf(f, "#");
			fprintf(f, "key %s = ", cmds[i].name);
			for (j = 0; j < MAX_COMMAND_KEYS; j++) {
				if (j && cmds[i].keys[j])
					fprintf(f, ",  ");
				if (!j || cmds[i].keys[j]) {
					if (cmds[i].keys[j]<256 && (isalpha(cmds[i].keys[j]) ||
								    isdigit(cmds[i].keys[j])))
						fprintf(f, "\'%c\'", cmds[i].keys[j]);
					else
						fprintf(f, "%d", cmds[i].keys[j]);
				}
			}
			fprintf(f,"\n\n");
		}
		i++;
	}

	return ferror(f);
}