src/screen_lyrics.c

   1 /*
   2  * (c) 2006 by Kalle Wallin <kaw@linux.se>
   3  * Copyright (C) 2008 Max Kellermann <max@duempel.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  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  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 "screen_utils.h"
  27 #include "strfsong.h"
  28 #include "lyrics.h"
  29 #include "charset.h"
  30 #include "gcc.h"
  31
  32 #define _GNU_SOURCE
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <glib.h>
  36 #include <unistd.h>
  37 #include <stdio.h>
  38
  39 static list_window_t *lw = NULL;
  40
  41 static const struct mpd_song *next_song;
  42
  43 static struct {
  44         struct mpd_song *song;
  45
  46         char *artist, *title;
  47
  48         struct lyrics_loader *loader;
  49
  50         GPtrArray *lines;
  51 } current;
  52
  53 static void
  54 screen_lyrics_abort(void)
  55 {
  56         if (current.loader != NULL) {
  57                 lyrics_free(current.loader);
  58                 current.loader = NULL;
  59         }
  60
  61         if (current.artist != NULL) {
  62                 g_free(current.artist);
  63                 current.artist = NULL;
  64         }
  65
  66         if (current.title != NULL) {
  67                 g_free(current.title);
  68                 current.artist = NULL;
  69         }
  70
  71         if (current.song != NULL) {
  72                 mpd_freeSong(current.song);
  73                 current.song = NULL;
  74         }
  75 }
  76
  77 static void
  78 screen_lyrics_clear(void)
  79 {
  80         guint i;
  81
  82         for (i = 0; i < current.lines->len; ++i)
  83                 g_free(g_ptr_array_index(current.lines, i));
  84
  85         g_ptr_array_set_size(current.lines, 0);
  86 }
  87
  88 static void
  89 lyrics_paint(void);
  90
  91 /**
  92  * Repaint and update the screen.
  93  */
  94 static void
  95 lyrics_repaint(void)
  96 {
  97         lyrics_paint();
  98         wrefresh(lw->w);
  99 }
 100
 101 /**
 102  * Repaint and update the screen, if it is currently active.
 103  */
 104 static void
 105 lyrics_repaint_if_active(void)
 106 {
 107         if (screen_is_visible(&screen_lyrics)) {
 108                 lyrics_repaint();
 109
 110                 /* XXX repaint the screen title */
 111         }
 112 }
 113
 114 static void
 115 screen_lyrics_set(const GString *str)
 116 {
 117         const char *p, *eol, *next;
 118
 119         screen_lyrics_clear();
 120
 121         p = str->str;
 122         while ((eol = strchr(p, '\n')) != NULL) {
 123                 char *line;
 124
 125                 next = eol + 1;
 126
 127                 /* strip whitespace at end */
 128
 129                 while (eol > p && (unsigned char)eol[-1] <= 0x20)
 130                         --eol;
 131
 132                 /* create copy and append it to current.lines*/
 133
 134                 line = g_malloc(eol - p + 1);
 135                 memcpy(line, p, eol - p);
 136                 line[eol - p] = 0;
 137
 138                 g_ptr_array_add(current.lines, line);
 139
 140                 /* reset control characters */
 141
 142                 for (eol = line + (eol - p); line < eol; ++line)
 143                         if ((unsigned char)*line < 0x20)
 144                                 *line = ' ';
 145
 146                 p = next;
 147         }
 148
 149         if (*p != 0)
 150                 g_ptr_array_add(current.lines, g_strdup(p));
 151
 152         /* paint new data */
 153
 154         lyrics_repaint_if_active();
 155 }
 156
 157 static void
 158 screen_lyrics_callback(const GString *result, mpd_unused void *data)
 159 {
 160         assert(current.loader != NULL);
 161
 162         if (result != NULL)
 163                 screen_lyrics_set(result);
 164         else
 165                 screen_status_message (_("No lyrics"));
 166
 167         lyrics_free(current.loader);
 168         current.loader = NULL;
 169 }
 170
 171 static void
 172 screen_lyrics_load(const struct mpd_song *song)
 173 {
 174         char buffer[MAX_SONGNAME_LENGTH];
 175
 176         assert(song != NULL);
 177
 178         screen_lyrics_abort();
 179         screen_lyrics_clear();
 180
 181         current.song = mpd_songDup(song);
 182
 183         strfsong(buffer, sizeof(buffer), "%artist%", song);
 184         current.artist = g_strdup(buffer);
 185
 186         strfsong(buffer, sizeof(buffer), "%title%", song);
 187         current.title = g_strdup(buffer);
 188
 189         current.loader = lyrics_load(current.artist, current.title,
 190                                      screen_lyrics_callback, NULL);
 191 }
 192
 193 static FILE *create_lyr_file(const char *artist, const char *title)
 194 {
 195         char path[1024];
 196
 197         snprintf(path, 1024, "%s/.lyrics",
 198                  getenv("HOME"));
 199         mkdir(path, S_IRWXU);
 200
 201         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 202                  getenv("HOME"), artist, title);
 203
 204         return fopen(path, "w");
 205 }
 206
 207 static int store_lyr_hd(void)
 208 {
 209         FILE *lyr_file;
 210         unsigned i;
 211
 212         lyr_file = create_lyr_file(current.artist, current.title);
 213         if (lyr_file == NULL)
 214                 return -1;
 215
 216         for (i = 0; i < current.lines->len; ++i)
 217                 fprintf(lyr_file, "%s\n",
 218                         (const char*)g_ptr_array_index(current.lines, i));
 219
 220         fclose(lyr_file);
 221         return 0;
 222 }
 223
 224 static const char *
 225 list_callback(unsigned idx, mpd_unused int *highlight, mpd_unused void *data)
 226 {
 227         static char buffer[256];
 228         char *value;
 229
 230         if (idx >= current.lines->len)
 231                 return NULL;
 232
 233         value = utf8_to_locale(g_ptr_array_index(current.lines, idx));
 234         g_strlcpy(buffer, value, sizeof(buffer));
 235         free(value);
 236
 237         return buffer;
 238 }
 239
 240
 241 static void
 242 lyrics_screen_init(WINDOW *w, int cols, int rows)
 243 {
 244         current.lines = g_ptr_array_new();
 245         lw = list_window_init(w, cols, rows);
 246         lw->flags = LW_HIDE_CURSOR;
 247 }
 248
 249 static void
 250 lyrics_resize(int cols, int rows)
 251 {
 252         lw->cols = cols;
 253         lw->rows = rows;
 254 }
 255
 256 static void
 257 lyrics_exit(void)
 258 {
 259         list_window_free(lw);
 260
 261         screen_lyrics_abort();
 262         screen_lyrics_clear();
 263
 264         g_ptr_array_free(current.lines, TRUE);
 265         current.lines = NULL;
 266 }
 267
 268 static void
 269 lyrics_open(mpdclient_t *c)
 270 {
 271         if (next_song == NULL)
 272                 next_song = c->song;
 273
 274         if (next_song != NULL &&
 275             (current.song == NULL ||
 276              strcmp(next_song->file, current.song->file) != 0))
 277                 screen_lyrics_load(next_song);
 278
 279         next_song = NULL;
 280 }
 281
 282
 283 static const char *
 284 lyrics_title(char *str, size_t size)
 285 {
 286         if (current.loader != NULL) {
 287                 snprintf(str, size, "%s (%s)",
 288                          _("Lyrics"), _("loading..."));
 289                 return str;
 290         } else if (current.artist != NULL && current.title != NULL &&
 291                    current.lines->len > 0) {
 292                 snprintf(str, size, "%s: %s - %s",
 293                          _("Lyrics"),
 294                          current.artist, current.title);
 295                 return str;
 296         } else
 297                 return _("Lyrics");
 298 }
 299
 300 static void
 301 lyrics_paint(void)
 302 {
 303         list_window_paint(lw, list_callback, NULL);
 304 }
 305
 306 static int
 307 lyrics_cmd(mpdclient_t *c, command_t cmd)
 308 {
 309         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 310                 lyrics_repaint();
 311                 return 1;
 312         }
 313
 314         switch(cmd) {
 315         case CMD_INTERRUPT:
 316                 if (current.loader != NULL) {
 317                         screen_lyrics_abort();
 318                         screen_lyrics_clear();
 319                 }
 320                 return 1;
 321         case CMD_ADD:
 322                 if (current.loader == NULL && current.artist != NULL &&
 323                     current.title != NULL && store_lyr_hd() == 0)
 324                         screen_status_message (_("Lyrics saved!"));
 325                 return 1;
 326         case CMD_LYRICS_UPDATE:
 327                 if (c->song != NULL) {
 328                         screen_lyrics_load(c->song);
 329                         lyrics_repaint();
 330                 }
 331                 return 1;
 332         default:
 333                 break;
 334         }
 335
 336         lw->selected = lw->start+lw->rows;
 337         if (screen_find(lw, current.lines->len,
 338                         cmd, list_callback, NULL)) {
 339                 /* center the row */
 340                 list_window_center(lw, current.lines->len, lw->selected);
 341                 lyrics_repaint();
 342                 return 1;
 343         }
 344
 345         return 0;
 346 }
 347
 348 const struct screen_functions screen_lyrics = {
 349         .init = lyrics_screen_init,
 350         .exit = lyrics_exit,
 351         .open = lyrics_open,
 352         .close = NULL,
 353         .resize = lyrics_resize,
 354         .paint = lyrics_paint,
 355         .cmd = lyrics_cmd,
 356         .get_title = lyrics_title,
 357 };
 358
 359 void
 360 screen_lyrics_switch(struct mpdclient *c, const struct mpd_song *song)
 361 {
 362         assert(song != NULL);
 363
 364         next_song = song;
 365         screen_switch(&screen_lyrics, c);
 366 }