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 "gcc.h"
  30
  31 #define _GNU_SOURCE
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <glib.h>
  35 #include <ncurses.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         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 void
  86 lyrics_paint(mpdclient_t *c);
  87
  88 /**
  89  * Repaint and update the screen.
  90  */
  91 static void
  92 lyrics_repaint(void)
  93 {
  94         lyrics_paint(NULL);
  95         wrefresh(lw->w);
  96 }
  97
  98 /**
  99  * Repaint and update the screen, if it is currently active.
 100  */
 101 static void
 102 lyrics_repaint_if_active(void)
 103 {
 104         if (screen_is_visible(&screen_lyrics)) {
 105                 lyrics_repaint();
 106
 107                 /* XXX repaint the screen title */
 108         }
 109 }
 110
 111 static void
 112 screen_lyrics_set(const GString *str)
 113 {
 114         const char *p, *eol, *next;
 115
 116         screen_lyrics_clear();
 117
 118         p = str->str;
 119         while ((eol = strchr(p, '\n')) != NULL) {
 120                 char *line;
 121
 122                 next = eol + 1;
 123
 124                 /* strip whitespace at end */
 125
 126                 while (eol > p && (unsigned char)eol[-1] <= 0x20)
 127                         --eol;
 128
 129                 /* create copy and append it to current.lines*/
 130
 131                 line = g_malloc(eol - p + 1);
 132                 memcpy(line, p, eol - p);
 133                 line[eol - p] = 0;
 134
 135                 g_ptr_array_add(current.lines, line);
 136
 137                 /* reset control characters */
 138
 139                 for (eol = line + (eol - p); line < eol; ++line)
 140                         if ((unsigned char)*line < 0x20)
 141                                 *line = ' ';
 142
 143                 p = next;
 144         }
 145
 146         if (*p != 0)
 147                 g_ptr_array_add(current.lines, g_strdup(p));
 148
 149         /* paint new data */
 150
 151         lyrics_repaint_if_active();
 152 }
 153
 154 static void
 155 screen_lyrics_callback(const GString *result, mpd_unused void *data)
 156 {
 157         assert(current.loader != NULL);
 158
 159         if (result != NULL)
 160                 screen_lyrics_set(result);
 161         else
 162                 screen_status_message (_("No lyrics"));
 163
 164         lyrics_free(current.loader);
 165         current.loader = NULL;
 166 }
 167
 168 static void
 169 screen_lyrics_load(const struct mpd_song *song)
 170 {
 171         char buffer[MAX_SONGNAME_LENGTH];
 172
 173         assert(song != NULL);
 174
 175         screen_lyrics_abort();
 176         screen_lyrics_clear();
 177
 178         current.song = song;
 179
 180         strfsong(buffer, sizeof(buffer), "%artist%", song);
 181         current.artist = g_strdup(buffer);
 182
 183         strfsong(buffer, sizeof(buffer), "%title%", song);
 184         current.title = g_strdup(buffer);
 185
 186         current.loader = lyrics_load(current.artist, current.title,
 187                                      screen_lyrics_callback, NULL);
 188 }
 189
 190 static FILE *create_lyr_file(const char *artist, const char *title)
 191 {
 192         char path[1024];
 193
 194         snprintf(path, 1024, "%s/.lyrics",
 195                  getenv("HOME"));
 196         mkdir(path, S_IRWXU);
 197
 198         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 199                  getenv("HOME"), artist, title);
 200
 201         return fopen(path, "w");
 202 }
 203
 204 static int store_lyr_hd(void)
 205 {
 206         FILE *lyr_file;
 207         unsigned i;
 208
 209         lyr_file = create_lyr_file(current.artist, current.title);
 210         if (lyr_file == NULL)
 211                 return -1;
 212
 213         for (i = 0; i < current.lines->len; ++i)
 214                 fprintf(lyr_file, "%s\n",
 215                         (const char*)g_ptr_array_index(current.lines, i));
 216
 217         fclose(lyr_file);
 218         return 0;
 219 }
 220
 221 static const char *
 222 list_callback(unsigned idx, mpd_unused int *highlight, mpd_unused void *data)
 223 {
 224         if (idx >= current.lines->len)
 225                 return NULL;
 226
 227         return g_ptr_array_index(current.lines, idx);
 228 }
 229
 230
 231 static void
 232 lyrics_screen_init(WINDOW *w, int cols, int rows)
 233 {
 234         current.lines = g_ptr_array_new();
 235         lw = list_window_init(w, cols, rows);
 236         lw->flags = LW_HIDE_CURSOR;
 237 }
 238
 239 static void
 240 lyrics_resize(int cols, int rows)
 241 {
 242         lw->cols = cols;
 243         lw->rows = rows;
 244 }
 245
 246 static void
 247 lyrics_exit(void)
 248 {
 249         list_window_free(lw);
 250
 251         screen_lyrics_abort();
 252         screen_lyrics_clear();
 253
 254         g_ptr_array_free(current.lines, TRUE);
 255         current.lines = NULL;
 256 }
 257
 258 static void
 259 lyrics_open(mpd_unused screen_t *screen, mpdclient_t *c)
 260 {
 261         if (next_song == NULL)
 262                 next_song = c->song;
 263
 264         if (next_song != NULL && next_song != current.song)
 265                 screen_lyrics_load(next_song);
 266
 267         next_song = NULL;
 268 }
 269
 270
 271 static const char *
 272 lyrics_title(char *str, size_t size)
 273 {
 274         if (current.loader != NULL)
 275                 return "Lyrics (loading)";
 276         else if (current.artist != NULL && current.title != NULL &&
 277                  current.lines->len > 0) {
 278                 snprintf(str, size, "Lyrics: %s - %s",
 279                          current.artist, current.title);
 280                 return str;
 281         } else
 282                 return "Lyrics";
 283 }
 284
 285 static void
 286 lyrics_paint(mpd_unused mpdclient_t *c)
 287 {
 288         list_window_paint(lw, list_callback, NULL);
 289 }
 290
 291 static int
 292 lyrics_cmd(screen_t *screen, mpdclient_t *c, command_t cmd)
 293 {
 294         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 295                 lyrics_repaint();
 296                 return 1;
 297         }
 298
 299         switch(cmd) {
 300         case CMD_INTERRUPT:
 301                 if (current.loader != NULL) {
 302                         screen_lyrics_abort();
 303                         screen_lyrics_clear();
 304                 }
 305                 return 1;
 306         case CMD_ADD:
 307                 if (current.loader == NULL && current.artist != NULL &&
 308                     current.title != NULL && store_lyr_hd() == 0)
 309                         screen_status_message (_("Lyrics saved!"));
 310                 return 1;
 311         case CMD_LYRICS_UPDATE:
 312                 if (c->song != NULL) {
 313                         screen_lyrics_load(c->song);
 314                         lyrics_repaint();
 315                 }
 316                 return 1;
 317         default:
 318                 break;
 319         }
 320
 321         lw->selected = lw->start+lw->rows;
 322         if (screen_find(screen,
 323                         lw, current.lines->len,
 324                         cmd, list_callback, NULL)) {
 325                 /* center the row */
 326                 list_window_center(lw, current.lines->len, lw->selected);
 327                 lyrics_repaint();
 328                 return 1;
 329         }
 330
 331         return 0;
 332 }
 333
 334 const struct screen_functions screen_lyrics = {
 335         .init = lyrics_screen_init,
 336         .exit = lyrics_exit,
 337         .open = lyrics_open,
 338         .close = NULL,
 339         .resize = lyrics_resize,
 340         .paint = lyrics_paint,
 341         .cmd = lyrics_cmd,
 342         .get_title = lyrics_title,
 343 };
 344
 345 void
 346 screen_lyrics_switch(struct mpdclient *c, const struct mpd_song *song)
 347 {
 348         assert(song != NULL);
 349
 350         next_song = song;
 351         screen_switch(&screen_lyrics, c);
 352 }