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 <sys/stat.h>
  21 #include "i18n.h"
  22 #include "options.h"
  23 #include "mpdclient.h"
  24 #include "command.h"
  25 #include "screen.h"
  26 #include "strfsong.h"
  27 #include "lyrics.h"
  28 #include "screen_text.h"
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <glib.h>
  33 #include <unistd.h>
  34 #include <stdio.h>
  35
  36 static struct screen_text text;
  37
  38 static struct mpd_song *next_song;
  39 static bool follow = false;
  40
  41 static struct {
  42         struct mpd_song *song;
  43
  44         char *artist, *title;
  45
  46         struct plugin_cycle *loader;
  47 } current;
  48
  49 static void
  50 screen_lyrics_abort(void)
  51 {
  52         if (current.loader != NULL) {
  53                 plugin_stop(current.loader);
  54                 current.loader = NULL;
  55         }
  56
  57         if (current.artist != NULL) {
  58                 g_free(current.artist);
  59                 current.artist = NULL;
  60         }
  61
  62         if (current.title != NULL) {
  63                 g_free(current.title);
  64                 current.artist = NULL;
  65         }
  66
  67         if (current.song != NULL) {
  68                 mpd_song_free(current.song);
  69                 current.song = NULL;
  70         }
  71 }
  72
  73 /**
  74  * Repaint and update the screen, if it is currently active.
  75  */
  76 static void
  77 lyrics_repaint_if_active(void)
  78 {
  79         if (screen_is_visible(&screen_lyrics)) {
  80                 screen_text_repaint(&text);
  81
  82                 /* XXX repaint the screen title */
  83         }
  84 }
  85
  86 static bool
  87 exists_lyr_file(const char *artist, const char *title)
  88 {
  89         char path[1024];
  90         struct stat result;
  91
  92         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
  93                  getenv("HOME"), artist, title);
  94
  95         return (stat(path, &result) == 0);
  96 }
  97
  98 static FILE *
  99 create_lyr_file(const char *artist, const char *title)
 100 {
 101         char path[1024];
 102
 103         snprintf(path, 1024, "%s/.lyrics",
 104                  getenv("HOME"));
 105         mkdir(path, S_IRWXU);
 106
 107         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 108                  getenv("HOME"), artist, title);
 109
 110         return fopen(path, "w");
 111 }
 112
 113 static int
 114 store_lyr_hd(void)
 115 {
 116         FILE *lyr_file;
 117         unsigned i;
 118
 119         lyr_file = create_lyr_file(current.artist, current.title);
 120         if (lyr_file == NULL)
 121                 return -1;
 122
 123         for (i = 0; i < text.lines->len; ++i)
 124                 fprintf(lyr_file, "%s\n",
 125                         (const char*)g_ptr_array_index(text.lines, i));
 126
 127         fclose(lyr_file);
 128         return 0;
 129 }
 130
 131 static void
 132 screen_lyrics_set(const GString *str)
 133 {
 134         screen_text_set(&text, str);
 135
 136         /* paint new data */
 137
 138         lyrics_repaint_if_active();
 139
 140         if (options.lyrics_autosave &&
 141             !exists_lyr_file(current.artist, current.title))
 142                 store_lyr_hd();
 143 }
 144
 145 static void
 146 screen_lyrics_callback(const GString *result, G_GNUC_UNUSED void *data)
 147 {
 148         assert(current.loader != NULL);
 149
 150         if (result != NULL)
 151                 screen_lyrics_set(result);
 152         else
 153                 /* translators: no lyrics were found for the song */
 154                 screen_status_message (_("No lyrics"));
 155
 156         plugin_stop(current.loader);
 157         current.loader = NULL;
 158 }
 159
 160 static void
 161 screen_lyrics_load(const struct mpd_song *song)
 162 {
 163         char buffer[MAX_SONGNAME_LENGTH];
 164
 165         assert(song != NULL);
 166
 167         screen_lyrics_abort();
 168         screen_text_clear(&text);
 169
 170         current.song = mpd_song_dup(song);
 171
 172         strfsong(buffer, sizeof(buffer), "%artist%", song);
 173         current.artist = g_strdup(buffer);
 174
 175         strfsong(buffer, sizeof(buffer), "%title%", song);
 176         current.title = g_strdup(buffer);
 177
 178         current.loader = lyrics_load(current.artist, current.title,
 179                                      screen_lyrics_callback, NULL);
 180 }
 181
 182 static void
 183 lyrics_screen_init(WINDOW *w, int cols, int rows)
 184 {
 185         screen_text_init(&text, w, cols, rows);
 186 }
 187
 188 static void
 189 lyrics_resize(int cols, int rows)
 190 {
 191         screen_text_resize(&text, cols, rows);
 192 }
 193
 194 static void
 195 lyrics_exit(void)
 196 {
 197         screen_lyrics_abort();
 198
 199         screen_text_deinit(&text);
 200 }
 201
 202 static void
 203 lyrics_open(mpdclient_t *c)
 204 {
 205         if (next_song == NULL)
 206                 next_song = c->song;
 207
 208         if (next_song != NULL &&
 209             (current.song == NULL ||
 210              strcmp(mpd_song_get_uri(next_song),
 211                     mpd_song_get_uri(current.song)) != 0))
 212                 screen_lyrics_load(next_song);
 213
 214         if (next_song != c->song)
 215                 mpd_song_free(next_song);
 216         next_song = NULL;
 217 }
 218
 219 static void
 220 lyrics_update(mpdclient_t *c)
 221 {
 222         if (!follow)
 223                 return;
 224
 225         next_song = c->song;
 226
 227         if (next_song != NULL &&
 228             (current.song == NULL ||
 229              strcmp(mpd_song_get_uri(next_song),
 230                     mpd_song_get_uri(current.song)) != 0))
 231                 screen_lyrics_load(next_song);
 232
 233         next_song = NULL;
 234 }
 235
 236 static const char *
 237 lyrics_title(char *str, size_t size)
 238 {
 239         if (current.loader != NULL) {
 240                 snprintf(str, size, "%s (%s)",
 241                          _("Lyrics"),
 242                          /* translators: this message is displayed
 243                             while data is retrieved */
 244                          _("loading..."));
 245                 return str;
 246         } else if (current.artist != NULL && current.title != NULL &&
 247                    !screen_text_is_empty(&text)) {
 248                 snprintf(str, size, "%s: %s - %s",
 249                          _("Lyrics"),
 250                          current.artist, current.title);
 251                 return str;
 252         } else
 253                 return _("Lyrics");
 254 }
 255
 256 static void
 257 lyrics_paint(void)
 258 {
 259         screen_text_paint(&text);
 260 }
 261
 262 static bool
 263 lyrics_cmd(mpdclient_t *c, command_t cmd)
 264 {
 265         if (screen_text_cmd(&text, c, cmd))
 266                 return true;
 267
 268         switch(cmd) {
 269         case CMD_INTERRUPT:
 270                 if (current.loader != NULL) {
 271                         screen_lyrics_abort();
 272                         screen_text_clear(&text);
 273                 }
 274                 return true;
 275         case CMD_SAVE_PLAYLIST:
 276                 if (current.loader == NULL && current.artist != NULL &&
 277                     current.title != NULL && store_lyr_hd() == 0)
 278                         /* lyrics for the song were saved on hard disk */
 279                         screen_status_message (_("Lyrics saved"));
 280                 return true;
 281         case CMD_LYRICS_UPDATE:
 282                 if (c->song != NULL) {
 283                         screen_lyrics_load(c->song);
 284                         screen_text_repaint(&text);
 285                 }
 286                 return true;
 287
 288 #ifdef ENABLE_SONG_SCREEN
 289         case CMD_SCREEN_SONG:
 290                 if (current.song != NULL) {
 291                         screen_song_switch(c, current.song);
 292                         return true;
 293                 }
 294
 295                 break;
 296 #endif
 297         case CMD_SCREEN_SWAP:
 298                 screen_swap(c, current.song);
 299                 return true;
 300
 301         case CMD_LOCATE:
 302                 if (current.song != NULL) {
 303                         screen_file_goto_song(c, current.song);
 304                         return true;
 305                 }
 306
 307                 return false;
 308
 309         default:
 310                 break;
 311         }
 312
 313         return false;
 314 }
 315
 316 const struct screen_functions screen_lyrics = {
 317         .init = lyrics_screen_init,
 318         .exit = lyrics_exit,
 319         .open = lyrics_open,
 320         .update = lyrics_update,
 321         .close = NULL,
 322         .resize = lyrics_resize,
 323         .paint = lyrics_paint,
 324         .cmd = lyrics_cmd,
 325         .get_title = lyrics_title,
 326 };
 327
 328 void
 329 screen_lyrics_switch(struct mpdclient *c, const struct mpd_song *song, bool f)
 330 {
 331         assert(song != NULL);
 332
 333         follow = f;
 334         next_song = mpd_song_dup(song);
 335         screen_switch(&screen_lyrics, c);
 336 }