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 "ncmpc.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 struct {
  42         const struct mpd_song *song;
  43
  44         char *artist, *title;
  45
  46         struct lyrics_loader *loader;
  47
  48         GPtrArray *lines;
  49 } current;
  50
  51 static void
  52 screen_lyrics_abort(void)
  53 {
  54         if (current.loader != NULL) {
  55                 lyrics_free(current.loader);
  56                 current.loader = NULL;
  57         }
  58
  59         if (current.artist != NULL) {
  60                 g_free(current.artist);
  61                 current.artist = NULL;
  62         }
  63
  64         if (current.title != NULL) {
  65                 g_free(current.title);
  66                 current.artist = NULL;
  67         }
  68
  69         current.song = NULL;
  70 }
  71
  72 static void
  73 screen_lyrics_clear(void)
  74 {
  75         guint i;
  76
  77         for (i = 0; i < current.lines->len; ++i)
  78                 g_free(g_ptr_array_index(current.lines, i));
  79
  80         g_ptr_array_set_size(current.lines, 0);
  81 }
  82
  83 static void
  84 lyrics_paint(mpdclient_t *c);
  85
  86 /**
  87  * Repaint and update the screen.
  88  */
  89 static void
  90 lyrics_repaint(void)
  91 {
  92         lyrics_paint(NULL);
  93         wrefresh(lw->w);
  94 }
  95
  96 /**
  97  * Repaint and update the screen, if it is currently active.
  98  */
  99 static void
 100 lyrics_repaint_if_active(void)
 101 {
 102         if (screen_is_visible(&screen_lyrics)) {
 103                 lyrics_repaint();
 104
 105                 /* XXX repaint the screen title */
 106         }
 107 }
 108
 109 static void
 110 screen_lyrics_set(const GString *str)
 111 {
 112         const char *p, *eol, *next;
 113
 114         screen_lyrics_clear();
 115
 116         p = str->str;
 117         while ((eol = strchr(p, '\n')) != NULL) {
 118                 char *line;
 119
 120                 next = eol + 1;
 121
 122                 /* strip whitespace at end */
 123
 124                 while (eol > p && (unsigned char)eol[-1] <= 0x20)
 125                         --eol;
 126
 127                 /* create copy and append it to current.lines*/
 128
 129                 line = g_malloc(eol - p + 1);
 130                 memcpy(line, p, eol - p);
 131                 line[eol - p] = 0;
 132
 133                 g_ptr_array_add(current.lines, line);
 134
 135                 /* reset control characters */
 136
 137                 for (eol = line + (eol - p); line < eol; ++line)
 138                         if ((unsigned char)*line < 0x20)
 139                                 *line = ' ';
 140
 141                 p = next;
 142         }
 143
 144         if (*p != 0)
 145                 g_ptr_array_add(current.lines, g_strdup(p));
 146
 147         /* paint new data */
 148
 149         lyrics_repaint_if_active();
 150 }
 151
 152 static void
 153 screen_lyrics_callback(const GString *result, mpd_unused void *data)
 154 {
 155         assert(current.loader != NULL);
 156
 157         if (result != NULL)
 158                 screen_lyrics_set(result);
 159         else
 160                 screen_status_message (_("No lyrics"));
 161
 162         lyrics_free(current.loader);
 163         current.loader = NULL;
 164 }
 165
 166 static void
 167 screen_lyrics_load(const struct mpd_song *song)
 168 {
 169         char buffer[MAX_SONGNAME_LENGTH];
 170
 171         assert(song != NULL);
 172
 173         screen_lyrics_abort();
 174         screen_lyrics_clear();
 175
 176         current.song = song;
 177
 178         strfsong(buffer, sizeof(buffer), "%artist%", song);
 179         current.artist = g_strdup(buffer);
 180
 181         strfsong(buffer, sizeof(buffer), "%title%", song);
 182         current.title = g_strdup(buffer);
 183
 184         current.loader = lyrics_load(current.artist, current.title,
 185                                      screen_lyrics_callback, NULL);
 186 }
 187
 188 static FILE *create_lyr_file(const char *artist, const char *title)
 189 {
 190         char path[1024];
 191
 192         snprintf(path, 1024, "%s/.lyrics",
 193                  getenv("HOME"));
 194         mkdir(path, S_IRWXU);
 195
 196         snprintf(path, 1024, "%s/.lyrics/%s - %s.txt",
 197                  getenv("HOME"), artist, title);
 198
 199         return fopen(path, "w");
 200 }
 201
 202 static int store_lyr_hd(void)
 203 {
 204         FILE *lyr_file;
 205         unsigned i;
 206
 207         lyr_file = create_lyr_file(current.artist, current.title);
 208         if (lyr_file == NULL)
 209                 return -1;
 210
 211         for (i = 0; i < current.lines->len; ++i)
 212                 fprintf(lyr_file, "%s\n",
 213                         (const char*)g_ptr_array_index(current.lines, i));
 214
 215         fclose(lyr_file);
 216         return 0;
 217 }
 218
 219 static const char *
 220 list_callback(unsigned idx, mpd_unused int *highlight, mpd_unused void *data)
 221 {
 222         if (idx >= current.lines->len)
 223                 return NULL;
 224
 225         return g_ptr_array_index(current.lines, idx);
 226 }
 227
 228
 229 static void
 230 lyrics_screen_init(WINDOW *w, int cols, int rows)
 231 {
 232         current.lines = g_ptr_array_new();
 233         lw = list_window_init(w, cols, rows);
 234         lw->flags = LW_HIDE_CURSOR;
 235 }
 236
 237 static void
 238 lyrics_resize(int cols, int rows)
 239 {
 240         lw->cols = cols;
 241         lw->rows = rows;
 242 }
 243
 244 static void
 245 lyrics_exit(void)
 246 {
 247         list_window_free(lw);
 248
 249         screen_lyrics_abort();
 250         screen_lyrics_clear();
 251
 252         g_ptr_array_free(current.lines, TRUE);
 253         current.lines = NULL;
 254 }
 255
 256 static void
 257 lyrics_open(mpd_unused screen_t *screen, mpdclient_t *c)
 258 {
 259         if (c->song != NULL && c->song != current.song)
 260                 screen_lyrics_load(c->song);
 261 }
 262
 263
 264 static const char *
 265 lyrics_title(char *str, size_t size)
 266 {
 267         if (current.loader != NULL)
 268                 return "Lyrics (loading)";
 269         else if (current.artist != NULL && current.title != NULL &&
 270                  current.lines->len > 0) {
 271                 snprintf(str, size, "Lyrics: %s - %s",
 272                          current.artist, current.title);
 273                 return str;
 274         } else
 275                 return "Lyrics";
 276 }
 277
 278 static void
 279 lyrics_paint(mpd_unused mpdclient_t *c)
 280 {
 281         list_window_paint(lw, list_callback, NULL);
 282 }
 283
 284 static int
 285 lyrics_cmd(screen_t *screen, mpdclient_t *c, command_t cmd)
 286 {
 287         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 288                 lyrics_repaint();
 289                 return 1;
 290         }
 291
 292         switch(cmd) {
 293         case CMD_INTERRUPT:
 294                 if (current.loader != NULL) {
 295                         screen_lyrics_abort();
 296                         screen_lyrics_clear();
 297                 }
 298                 return 1;
 299         case CMD_ADD:
 300                 if (current.loader == NULL && current.artist != NULL &&
 301                     current.title != NULL && store_lyr_hd() == 0)
 302                         screen_status_message (_("Lyrics saved!"));
 303                 return 1;
 304         case CMD_LYRICS_UPDATE:
 305                 if (c->song != NULL) {
 306                         screen_lyrics_load(c->song);
 307                         lyrics_repaint();
 308                 }
 309                 return 1;
 310         default:
 311                 break;
 312         }
 313
 314         lw->selected = lw->start+lw->rows;
 315         if (screen_find(screen,
 316                         lw, current.lines->len,
 317                         cmd, list_callback, NULL)) {
 318                 /* center the row */
 319                 list_window_center(lw, current.lines->len, lw->selected);
 320                 lyrics_repaint();
 321                 return 1;
 322         }
 323
 324         return 0;
 325 }
 326
 327 const struct screen_functions screen_lyrics = {
 328         .init = lyrics_screen_init,
 329         .exit = lyrics_exit,
 330         .open = lyrics_open,
 331         .close = NULL,
 332         .resize = lyrics_resize,
 333         .paint = lyrics_paint,
 334         .cmd = lyrics_cmd,
 335         .get_title = lyrics_title,
 336 };