src/screen_lyrics.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_lyrics.h"
  21 #include "screen_interface.h"
  22 #include "screen_file.h"
  23 #include "screen_song.h"
  24 #include "i18n.h"
  25 #include "options.h"
  26 #include "mpdclient.h"
  27 #include "screen.h"
  28 #include "lyrics.h"
  29 #include "screen_text.h"
  30
  31 #include <assert.h>
  32 #include <sys/stat.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <glib.h>
  36 #include <unistd.h>
  37 #include <stdio.h>
  38
  39 static struct screen_text text;
  40
  41 static struct mpd_song *next_song;
  42 static bool follow = false;
  43
  44 static struct {
  45         struct mpd_song *song;
  46
  47         char *artist, *title;
  48
  49         struct plugin_cycle *loader;
  50 } current;
  51
  52 static void
  53 screen_lyrics_abort(void)
  54 {
  55         if (current.loader != NULL) {
  56                 plugin_stop(current.loader);
  57                 current.loader = NULL;
  58         }
  59
  60         if (current.artist != NULL) {
  61                 g_free(current.artist);
  62                 current.artist = NULL;
  63         }
  64
  65         if (current.title != NULL) {
  66                 g_free(current.title);
  67                 current.artist = NULL;
  68         }
  69
  70         if (current.song != NULL) {
  71                 mpd_song_free(current.song);
  72                 current.song = NULL;
  73         }
  74 }
  75
  76 /**
  77  * Repaint and update the screen, if it is currently active.
  78  */
  79 static void
  80 lyrics_repaint_if_active(void)
  81 {
  82         if (screen_is_visible(&screen_lyrics)) {
  83                 screen_text_repaint(&text);
  84
  85                 /* XXX repaint the screen title */
  86         }
  87 }
  88
  89 static bool
  90 exists_lyr_file(const char *artist, const char *title)
  91 {
  92         char path[1024];
  93         struct stat result;
  94
  95         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
  96                  getenv("HOME"), artist, title);
  97
  98         return (stat(path, &result) == 0);
  99 }
 100
 101 static FILE *
 102 create_lyr_file(const char *artist, const char *title)
 103 {
 104         char path[1024];
 105
 106         snprintf(path, 1024, "%s/.lyrics",
 107                  getenv("HOME"));
 108         mkdir(path, S_IRWXU);
 109
 110         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 111                  getenv("HOME"), artist, title);
 112
 113         return fopen(path, "w");
 114 }
 115
 116 static int
 117 store_lyr_hd(void)
 118 {
 119         FILE *lyr_file;
 120         unsigned i;
 121
 122         lyr_file = create_lyr_file(current.artist, current.title);
 123         if (lyr_file == NULL)
 124                 return -1;
 125
 126         for (i = 0; i < text.lines->len; ++i)
 127                 fprintf(lyr_file, "%s\n",
 128                         (const char*)g_ptr_array_index(text.lines, i));
 129
 130         fclose(lyr_file);
 131         return 0;
 132 }
 133
 134 static void
 135 screen_lyrics_set(const GString *str)
 136 {
 137         screen_text_set(&text, str);
 138
 139         /* paint new data */
 140
 141         lyrics_repaint_if_active();
 142
 143         if (options.lyrics_autosave &&
 144             !exists_lyr_file(current.artist, current.title))
 145                 store_lyr_hd();
 146 }
 147
 148 static void
 149 screen_lyrics_callback(const GString *result, G_GNUC_UNUSED void *data)
 150 {
 151         assert(current.loader != NULL);
 152
 153         if (result != NULL)
 154                 screen_lyrics_set(result);
 155         else
 156                 /* translators: no lyrics were found for the song */
 157                 screen_status_message (_("No lyrics"));
 158
 159         plugin_stop(current.loader);
 160         current.loader = NULL;
 161 }
 162
 163 static void
 164 screen_lyrics_load(const struct mpd_song *song)
 165 {
 166         const char *artist, *title;
 167
 168         assert(song != NULL);
 169
 170         screen_lyrics_abort();
 171         screen_text_clear(&text);
 172
 173         artist = mpd_song_get_tag(song, MPD_TAG_ARTIST, 0);
 174         title = mpd_song_get_tag(song, MPD_TAG_TITLE, 0);
 175
 176         current.song = mpd_song_dup(song);
 177         current.artist = g_strdup(artist);
 178         current.title = g_strdup(title);
 179
 180         current.loader = lyrics_load(current.artist, current.title,
 181                                      screen_lyrics_callback, NULL);
 182 }
 183
 184 static void
 185 lyrics_screen_init(WINDOW *w, int cols, int rows)
 186 {
 187         screen_text_init(&text, w, cols, rows);
 188 }
 189
 190 static void
 191 lyrics_resize(int cols, int rows)
 192 {
 193         screen_text_resize(&text, cols, rows);
 194 }
 195
 196 static void
 197 lyrics_exit(void)
 198 {
 199         screen_lyrics_abort();
 200
 201         screen_text_deinit(&text);
 202 }
 203
 204 static void
 205 lyrics_open(struct mpdclient *c)
 206 {
 207         const struct mpd_song *next_song_c =
 208                 next_song != NULL ? next_song : c->song;
 209
 210         if (next_song_c != NULL &&
 211             (current.song == NULL ||
 212              strcmp(mpd_song_get_uri(next_song_c),
 213                     mpd_song_get_uri(current.song)) != 0))
 214                 screen_lyrics_load(next_song_c);
 215
 216         if (next_song != NULL)
 217                 mpd_song_free(next_song);
 218         next_song = NULL;
 219 }
 220
 221 static void
 222 lyrics_update(struct mpdclient *c)
 223 {
 224         if (!follow)
 225                 return;
 226
 227         if (c->song != NULL &&
 228             (current.song == NULL ||
 229              strcmp(mpd_song_get_uri(c->song),
 230                     mpd_song_get_uri(current.song)) != 0))
 231                 screen_lyrics_load(c->song);
 232 }
 233
 234 static const char *
 235 lyrics_title(char *str, size_t size)
 236 {
 237         if (current.loader != NULL) {
 238                 snprintf(str, size, "%s (%s)",
 239                          _("Lyrics"),
 240                          /* translators: this message is displayed
 241                             while data is retrieved */
 242                          _("loading..."));
 243                 return str;
 244         } else if (current.artist != NULL && current.title != NULL &&
 245                    !screen_text_is_empty(&text)) {
 246                 snprintf(str, size, "%s: %s - %s",
 247                          _("Lyrics"),
 248                          current.artist, current.title);
 249                 return str;
 250         } else
 251                 return _("Lyrics");
 252 }
 253
 254 static void
 255 lyrics_paint(void)
 256 {
 257         screen_text_paint(&text);
 258 }
 259
 260 static bool
 261 lyrics_cmd(struct mpdclient *c, command_t cmd)
 262 {
 263         if (screen_text_cmd(&text, c, cmd))
 264                 return true;
 265
 266         switch(cmd) {
 267         case CMD_INTERRUPT:
 268                 if (current.loader != NULL) {
 269                         screen_lyrics_abort();
 270                         screen_text_clear(&text);
 271                 }
 272                 return true;
 273         case CMD_SAVE_PLAYLIST:
 274                 if (current.loader == NULL && current.artist != NULL &&
 275                     current.title != NULL && store_lyr_hd() == 0)
 276                         /* lyrics for the song were saved on hard disk */
 277                         screen_status_message (_("Lyrics saved"));
 278                 return true;
 279         case CMD_LYRICS_UPDATE:
 280                 if (c->song != NULL) {
 281                         screen_lyrics_load(c->song);
 282                         screen_text_repaint(&text);
 283                 }
 284                 return true;
 285
 286 #ifdef ENABLE_SONG_SCREEN
 287         case CMD_SCREEN_SONG:
 288                 if (current.song != NULL) {
 289                         screen_song_switch(c, current.song);
 290                         return true;
 291                 }
 292
 293                 break;
 294 #endif
 295         case CMD_SCREEN_SWAP:
 296                 screen_swap(c, current.song);
 297                 return true;
 298
 299         case CMD_LOCATE:
 300                 if (current.song != NULL) {
 301                         screen_file_goto_song(c, current.song);
 302                         return true;
 303                 }
 304
 305                 return false;
 306
 307         default:
 308                 break;
 309         }
 310
 311         return false;
 312 }
 313
 314 const struct screen_functions screen_lyrics = {
 315         .init = lyrics_screen_init,
 316         .exit = lyrics_exit,
 317         .open = lyrics_open,
 318         .update = lyrics_update,
 319         .close = NULL,
 320         .resize = lyrics_resize,
 321         .paint = lyrics_paint,
 322         .cmd = lyrics_cmd,
 323         .get_title = lyrics_title,
 324 };
 325
 326 void
 327 screen_lyrics_switch(struct mpdclient *c, const struct mpd_song *song, bool f)
 328 {
 329         assert(song != NULL);
 330
 331         follow = f;
 332         next_song = mpd_song_dup(song);
 333         screen_switch(&screen_lyrics, c);
 334 }