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 "config.h"
  21 #ifndef DISABLE_LYRICS_SCREEN
  22 #include <sys/stat.h>
  23 #include "ncmpc.h"
  24 #include "options.h"
  25 #include "mpdclient.h"
  26 #include "command.h"
  27 #include "screen.h"
  28 #include "screen_utils.h"
  29 #include "strfsong.h"
  30 #include "lyrics.h"
  31 #include "gcc.h"
  32
  33 #define _GNU_SOURCE
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <glib.h>
  37 #include <ncurses.h>
  38 #include <unistd.h>
  39 #include <stdio.h>
  40
  41 static list_window_t *lw = NULL;
  42
  43 static struct {
  44         const 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         current.song = NULL;
  72 }
  73
  74 static void
  75 screen_lyrics_clear(void)
  76 {
  77         guint i;
  78
  79         for (i = 0; i < current.lines->len; ++i)
  80                 g_free(g_ptr_array_index(current.lines, i));
  81
  82         g_ptr_array_set_size(current.lines, 0);
  83 }
  84
  85 static const char *
  86 list_callback(unsigned idx, int *highlight, void *data);
  87
  88 static void
  89 screen_lyrics_set(const GString *str)
  90 {
  91         const char *p, *eol, *next;
  92
  93         screen_lyrics_clear();
  94
  95         p = str->str;
  96         while ((eol = strchr(p, '\n')) != NULL) {
  97                 char *line;
  98
  99                 next = eol + 1;
 100
 101                 /* strip whitespace at end */
 102
 103                 while (eol > p && (unsigned char)eol[-1] <= 0x20)
 104                         --eol;
 105
 106                 /* create copy and append it to current.lines*/
 107
 108                 line = g_malloc(eol - p + 1);
 109                 memcpy(line, p, eol - p);
 110                 line[eol - p] = 0;
 111
 112                 g_ptr_array_add(current.lines, line);
 113
 114                 /* reset control characters */
 115
 116                 for (eol = line + (eol - p); line < eol; ++line)
 117                         if ((unsigned char)*line < 0x20)
 118                                 *line = ' ';
 119
 120                 p = next;
 121         }
 122
 123         if (*p != 0)
 124                 g_ptr_array_add(current.lines, g_strdup(p));
 125
 126         /* paint new data */
 127
 128         if (get_cur_mode_id() == 104) { /* XXX don't use the literal number */
 129                 list_window_paint(lw, list_callback, NULL);
 130                 wrefresh(lw->w);
 131
 132                 /* XXX repaint the screen title */
 133         }
 134 }
 135
 136 static void
 137 screen_lyrics_callback(const GString *result, mpd_unused void *data)
 138 {
 139         assert(current.loader != NULL);
 140
 141         if (result != NULL)
 142                 screen_lyrics_set(result);
 143         else
 144                 screen_status_message (_("No lyrics"));
 145
 146         lyrics_free(current.loader);
 147         current.loader = NULL;
 148 }
 149
 150 static void
 151 screen_lyrics_load(struct mpd_song *song)
 152 {
 153         char buffer[MAX_SONGNAME_LENGTH];
 154
 155         assert(song != NULL);
 156
 157         screen_lyrics_abort();
 158         screen_lyrics_clear();
 159
 160         current.song = song;
 161
 162         strfsong(buffer, sizeof(buffer), "%artist%", song);
 163         current.artist = g_strdup(buffer);
 164
 165         strfsong(buffer, sizeof(buffer), "%title%", song);
 166         current.title = g_strdup(buffer);
 167
 168         current.loader = lyrics_load(current.artist, current.title,
 169                                      screen_lyrics_callback, NULL);
 170 }
 171
 172 static FILE *create_lyr_file(const char *artist, const char *title)
 173 {
 174         char path[1024];
 175
 176         snprintf(path, 1024, "%s/.lyrics",
 177                  getenv("HOME"));
 178         mkdir(path, S_IRWXU);
 179
 180         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 181                  getenv("HOME"), artist, title);
 182
 183         return fopen(path, "w");
 184 }
 185
 186 static int store_lyr_hd(void)
 187 {
 188         FILE *lyr_file;
 189         unsigned i;
 190
 191         lyr_file = create_lyr_file(current.artist, current.title);
 192         if (lyr_file == NULL)
 193                 return -1;
 194
 195         for (i = 0; i < current.lines->len; ++i)
 196                 fprintf(lyr_file, "%s\n",
 197                         (const char*)g_ptr_array_index(current.lines, i));
 198
 199         fclose(lyr_file);
 200         return 0;
 201 }
 202
 203 static const char *
 204 list_callback(unsigned idx, mpd_unused int *highlight, mpd_unused void *data)
 205 {
 206         if (idx >= current.lines->len)
 207                 return NULL;
 208
 209         return g_ptr_array_index(current.lines, idx);
 210 }
 211
 212
 213 static void
 214 lyrics_screen_init(WINDOW *w, int cols, int rows)
 215 {
 216         current.lines = g_ptr_array_new();
 217         lw = list_window_init(w, cols, rows);
 218         lw->flags = LW_HIDE_CURSOR;
 219 }
 220
 221 static void
 222 lyrics_resize(int cols, int rows)
 223 {
 224         lw->cols = cols;
 225         lw->rows = rows;
 226 }
 227
 228 static void
 229 lyrics_exit(void)
 230 {
 231         list_window_free(lw);
 232
 233         screen_lyrics_abort();
 234         screen_lyrics_clear();
 235
 236         g_ptr_array_free(current.lines, TRUE);
 237         current.lines = NULL;
 238 }
 239
 240 static void
 241 lyrics_open(mpd_unused screen_t *screen, mpdclient_t *c)
 242 {
 243         if (c->song != NULL && c->song != current.song)
 244                 screen_lyrics_load(c->song);
 245 }
 246
 247
 248 static const char *
 249 lyrics_title(char *str, size_t size)
 250 {
 251         if (current.loader != NULL)
 252                 return "Lyrics (loading)";
 253         else if (current.artist != NULL && current.title != NULL &&
 254                  current.lines->len > 0) {
 255                 snprintf(str, size, "Lyrics: %s - %s",
 256                          current.artist, current.title);
 257                 return str;
 258         } else
 259                 return "Lyrics";
 260 }
 261
 262 static void
 263 lyrics_paint(mpd_unused mpdclient_t *c)
 264 {
 265         list_window_paint(lw, list_callback, NULL);
 266 }
 267
 268
 269 static void
 270 lyrics_update(mpd_unused screen_t *screen, mpd_unused mpdclient_t *c)
 271 {
 272         if( lw->repaint ) {
 273                 list_window_paint(lw, list_callback, NULL);
 274                 lw->repaint = 0;
 275         }
 276 }
 277
 278
 279 static int
 280 lyrics_cmd(screen_t *screen, mpdclient_t *c, command_t cmd)
 281 {
 282         if (list_window_scroll_cmd(lw, current.lines->len, cmd))
 283                 return 1;
 284
 285         switch(cmd) {
 286         case CMD_INTERRUPT:
 287                 if (current.loader != NULL) {
 288                         screen_lyrics_abort();
 289                         screen_lyrics_clear();
 290                 }
 291                 return 1;
 292         case CMD_ADD:
 293                 if (current.loader == NULL && current.artist != NULL &&
 294                     current.title != NULL && store_lyr_hd() == 0)
 295                         screen_status_message (_("Lyrics saved!"));
 296                 return 1;
 297         case CMD_LYRICS_UPDATE:
 298                 if (c->song != NULL) {
 299                         screen_lyrics_load(c->song);
 300                         lyrics_paint(NULL);
 301                         wrefresh(lw->w);
 302                 }
 303                 return 1;
 304         default:
 305                 break;
 306         }
 307
 308         lw->selected = lw->start+lw->rows;
 309         if (screen_find(screen,
 310                         lw, current.lines->len,
 311                         cmd, list_callback, NULL)) {
 312                 /* center the row */
 313                 list_window_center(lw, current.lines->len, lw->selected);
 314                 return 1;
 315         }
 316
 317         return 0;
 318 }
 319
 320 const struct screen_functions screen_lyrics = {
 321         .init = lyrics_screen_init,
 322         .exit = lyrics_exit,
 323         .open = lyrics_open,
 324         .close = NULL,
 325         .resize = lyrics_resize,
 326         .paint = lyrics_paint,
 327         .update = lyrics_update,
 328         .cmd = lyrics_cmd,
 329         .get_title = lyrics_title,
 330 };
 331
 332 #endif /* ENABLE_LYRICS_SCREEN */