1 /*
2 * $Id: screen_lyrics.c 3355 2006-09-1 17:44:04Z tradiaz $
3 *
4 * (c) 2006 by Kalle Wallin <kaw@linux.se>
5 * Tue Aug 1 23:17:38 2006
6 * lyrics enhancement written by Andreas Obergrusberger <tradiaz@yahoo.de>
7 * using www.leoslyrics.com XML API
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
24 #include <stdlib.h>
25 #include <string.h>
26 #include <glib.h>
27 #include <ncurses.h>
28 #include <expat.h>
29 #include <unistd.h>
31 #include "config.h"
32 #ifndef DISABLE_LYRICS_SCREEN
33 #include "ncmpc.h"
34 #include "options.h"
35 #include "mpdclient.h"
36 #include "command.h"
37 #include "screen.h"
38 #include "screen_utils.h"
39 #include "easy_download.h"
40 #include "strfsong.h"
42 #define LEOSLYRICS_SEARCH_URL "http://api.leoslyrics.com/api_search.php?auth=QuodLibet&artist=%s&songtitle=%s"
44 #define LEOSLYRICS_CONTENT_URL "http://api.leoslyrics.com/api_lyrics.php?auth=QuodLibet&hid=%s"
46 #define CREDITS "Lyrics provided by www.LeosLyrics.com"
47 typedef struct _formed_text
48 {
49 GString *text;
50 GArray *lines;
51 int val;
52 } formed_text;
55 XML_Parser parser, contentp;
56 static int lyrics_text_rows = -1;
57 static list_window_t *lw = NULL;
58 guint8 result;
59 char *hid;
60 GTimer *dltime;
61 short int lock;
62 //GString *lyr_text;
63 //char *lyr_text;
64 //GArray *textline;
65 formed_text lyr_text;
66 /* result is a bitset in which the succes when searching 4 lyrics is logged
67 countend by position - backwards
68 0: lyrics in database
69 1: proper access to the lyrics provider
70 2: lyrics found
71 3: exact match
72 4: lyrics downloaded
73 5: lyrics saved
74 wasting 3 bits doesn't mean being a fat memory hog like kde.... does it?
75 */
76 static void lyrics_paint(screen_t *screen, mpdclient_t *c);
78 void get_text_line(formed_text *text, int num, char *dest, int len)
79 {
80 memset(dest, '\0', len*sizeof(char));
81 if(num >= text->lines->len-1) return;
82 int linelen;
83 if(num == 0)
84 {
85 linelen = g_array_index(text->lines, int, num);
86 memcpy(dest, text->text->str, linelen*sizeof(char));
87 }
88 else if(num == 1)
89 { //dont ask me why, but this is needed....
90 linelen = g_array_index(text->lines, int, num)
91 - g_array_index(text->lines, int, num-1);
92 memcpy(dest, &text->text->str[g_array_index(text->lines, int, num-1)],
93 linelen*sizeof(char));
94 }
95 else
96 {
97 linelen = g_array_index(text->lines, int, num+1)
98 - g_array_index(text->lines, int, num);
99 memcpy(dest, &text->text->str[g_array_index(text->lines, int, num)],
100 linelen*sizeof(char));
101 }
102 dest[linelen] = '\n';
103 dest[linelen+1] = '\0';
104 }
106 void add_text_line(formed_text *dest, const char *src, int len)
107 {
108 // need this because g_array_append_val doesnt work with literals
109 // and expat sends "\n" as an extra line everytime
110 if(len == 0)
111 {
112 dest->val = strlen(src);
113 if(dest->lines->len > 0) dest->val += g_array_index(dest->lines, int,
114 dest->lines->len-1);
115 g_string_append(dest->text, src);
116 g_array_append_val(dest->lines, dest->val);
117 return;
118 }
119 if(len > 1 || dest->val == 0)
120 {
121 dest->val = len;
122 if(dest->lines->len > 0) dest->val += g_array_index(dest->lines, int,
123 dest->lines->len-1);
124 }
125 else if (len == 1 && dest->val != 0) dest->val = 0;
127 if(dest->val > 0)
128 {
129 g_string_append_len(dest->text, src, len);
130 g_array_append_val(dest->lines, dest->val);
131 }
132 }
134 void formed_text_init(formed_text *text)
135 {
136 if(text->text != NULL) g_string_free(text->text, TRUE);
137 text->text = g_string_new("");
139 if(text->lines != NULL) g_array_free(text->lines, TRUE);
140 text->lines = g_array_new(FALSE, TRUE, 4);
142 text->val = 0;
143 }
144 /*
145 char *check_lyr_hd(char *artist, char *title, int how)
146 { //checking whether for lyrics file existence and proper access
147 static char path[1024];
148 snprintf(path, 1024, "%s/.lyrics/%s/%s.lyric",
149 getenv("HOME"), artist, title);
151 if(g_access(path, how) != 0) return NULL;
152 return path;
153 }
155 int get_lyr_hd(char *artist, char *title)
156 {
157 char *path = check_lyr_hd(artist, title, R_OK);
158 if(path == NULL) return -1;
160 FILE *lyr_file;
161 lyr_file = fopen(path, "r");
162 if(lyr_file == NULL) return -1;
164 char *buf = NULL;
165 char **line = &buf;
166 size_t n = 0;
168 while(1)
169 {
170 n = getline(line, &n, lyr_file);
171 if( n < 1 || *line == NULL || feof(lyr_file) != 0 ) return 0;
172 add_text_line(&lyr_text, *line, n+1);
173 free(*line);
174 *line = NULL; n = 0;
175 }
177 return 0;
178 }
180 int store_lyr_hd()
181 {
182 char artist[512];
183 char title[512];
184 static char path[1024];
185 FILE *lyr_file;
187 get_text_line(&lyr_text, 0, artist, 512);
188 get_text_line(&lyr_text, 1, title, 512);
189 artist[strlen(artist)-2] = '\0';
190 title[strlen(title)-2] = '\0';
192 snprintf(path, 1024, "%s/.lyrics/%s/%s.lyric",
193 getenv("HOME"), artist, title);
195 if (check_lyr_hd(artist, title, F_OK) == 0) lyr_file = fopen(path, "w");
196 else lyr_file = fopen(path, "xw");
197 if(lyr_file == NULL) return -1;
199 int i;
200 char line_buf[1024];
202 for(i = 2; i <= lyr_text.text->len; i++)
203 {
204 get_text_line(&lyr_text, i, line_buf, 0);
205 fputs(line_buf, lyr_file);
206 }
207 fclose(lyr_file);
208 return 0;
209 }
211 */
212 void check_repaint()
213 {
214 if(screen_get_id("lyrics") == get_cur_mode_id())lyrics_paint(NULL, NULL);
215 }
217 int check_dl_progress(void *clientp, double dltotal, double dlnow,
218 double ultotal, double ulnow)
219 {
220 if(g_timer_elapsed(dltime, NULL) >= options.lyrics_timeout)
221 {
222 formed_text_init(&lyr_text);
223 return -1;
224 }
225 return 0;
226 }
230 static void check_content(void *data, const char *name, const char **atts)
231 {
232 if(strstr(name, "text") != NULL)
233 {
235 result |= 16;
236 }
237 }
240 static void check_search_response(void *data, const char *name,
241 const char **atts)
242 {
243 if(strstr(name, "response") != NULL)
244 {
245 result |=2;
246 return;
247 }
249 if(result & 4)
250 {
251 if(strstr(name, "result") != NULL)
252 {
253 if(strstr(atts[2], "hid") != NULL)
254 {
255 hid = atts[3];
256 }
258 if(strstr(atts[2], "exactMatch") != NULL)
259 {
260 result |= 8;
261 }
262 }
263 }
265 }
267 static void end_tag(void *data, const char *name)
268 {
269 //hmmmmmm
270 }
272 static void check_search_success(void *userData, const XML_Char *s, int len)
273 {
274 if(result & 2) //lets first check whether we're right
275 { //we don't really want to search in the wrong string
276 if(strstr((char*) s, "SUCCESS"))
277 {
278 result |=4;
279 }
280 }
281 }
283 static void fetch_text(void *userData, const XML_Char *s, int len)
284 {
285 if(result & 16)
286 {
287 add_text_line(&lyr_text, s, len);
288 }
289 }
291 gpointer get_lyr(void *c)
292 {
293 mpd_Status *status = ((mpdclient_t*)c)->status;
294 mpd_Song *cur = ((mpdclient_t*)c)->song;
295 mpdclient_update((mpdclient_t*)c);
297 if(!(IS_PAUSED(status->state)||IS_PLAYING(status->state)))
298 {
299 formed_text_init(&lyr_text);
300 return NULL;
301 }
303 char url_avail[256];
304 char url_hid[256];
305 char artist[MAX_SONGNAME_LENGTH];
306 char title[MAX_SONGNAME_LENGTH];
307 lock = 2;
308 result = 0;
310 if(dltime == NULL) dltime = g_timer_new();
312 strfsong(artist, MAX_SONGNAME_LENGTH, "%artist%", cur);
313 strfsong(title, MAX_SONGNAME_LENGTH, "%title%", cur);
315 formed_text_init(&lyr_text);
316 add_text_line(&lyr_text, artist, 0);
317 add_text_line(&lyr_text, title, 0);
319 //if(get_lyr_hd(artist, title) == 0) return &lyr_text;
321 //this replacess the whitespaces with '+'
322 g_strdelimit(artist, " ", '+');
323 g_strdelimit(title, " ", '+');
325 //we insert the artist and the title into the url
326 snprintf(url_avail, 512, LEOSLYRICS_SEARCH_URL, artist, title);
328 //download that xml!
329 easy_download_struct lyr_avail = {NULL, 0,-1};
331 g_timer_start(dltime);
332 if(!easy_download(url_avail, &lyr_avail, check_dl_progress)) return NULL;
333 g_timer_stop(dltime);
335 //we gotta parse that stuff with expat
336 parser = XML_ParserCreate(NULL);
337 XML_SetUserData(parser, NULL);
339 int state = 0;
341 XML_SetElementHandler(parser, check_search_response, end_tag);
342 XML_SetCharacterDataHandler(parser, check_search_success);
343 XML_Parse(parser, lyr_avail.data, strlen(lyr_avail.data), state);
344 XML_ParserFree(parser);
346 if(!(result & 4)) return NULL; //check whether lyrics found
347 easy_download_struct lyr_content = {NULL, 0,-1};
348 snprintf(url_hid, 512, LEOSLYRICS_CONTENT_URL, hid);
350 g_timer_continue(dltime);
351 if(!(easy_download(url_hid, &lyr_content, check_dl_progress))) return NULL;
352 g_timer_stop(dltime);
354 contentp = XML_ParserCreate(NULL);
355 XML_SetUserData(contentp, NULL);
356 XML_SetElementHandler(contentp, check_content, end_tag);
357 XML_SetCharacterDataHandler(contentp, fetch_text);
358 XML_Parse(contentp, lyr_content.data, strlen(lyr_content.data), state);
359 XML_ParserFree(contentp);
361 lw->start = 0;
362 check_repaint();
364 lock = 1;
365 return &lyr_text;
366 }
368 static char *
369 list_callback(int index, int *highlight, void *data)
370 {
371 static char buf[512];
372 int linelen;
374 //i think i'ts fine to write it into the 1st line...
375 if((index == lyr_text.lines->len && lyr_text.lines->len != 2)||
376 ((lyr_text.lines->len == 0
377 ||lyr_text.lines->len == 2) && index == 0))
378 {
379 *highlight=3;
380 return CREDITS;
381 }
383 if(index < 2 && lyr_text.lines->len > 2) *highlight=3;
384 else if(index >= lyr_text.lines->len || index == 2)
385 {
386 return "";
387 }
388 if(index >1) index--;
389 get_text_line(&lyr_text, index, buf, 512);
390 return buf;
391 }
394 static void
395 lyrics_init(WINDOW *w, int cols, int rows)
396 {
397 lw = list_window_init(w, cols, rows);
398 lw->flags = LW_HIDE_CURSOR;
399 //lyr_text.lines = g_array_new(FALSE, TRUE, 4);
400 formed_text_init(&lyr_text);
401 if (!g_thread_supported()) g_thread_init(NULL);
403 }
405 static void
406 lyrics_resize(int cols, int rows)
407 {
408 lw->cols = cols;
409 lw->rows = rows;
410 }
412 static void
413 lyrics_exit(void)
414 {
415 list_window_free(lw);
416 }
419 static char *
420 lyrics_title(char *str, size_t size)
421 {
422 if(lyr_text.lines->len == 2){
423 if(lock == 1 && !(result & 2)) return _("Lyrics [No connection]");
424 if(lock == 1 && !(result & 4)) return _("Lyrics [Not found]");
425 if(lock == 2) return _("Lyrics [retrieving]");
426 }
427 /*if(lyr_text.lines->len > 2)
428 {
429 static char buf[512];
430 char artist[512];
431 char title[512];
432 get_text_line(&lyr_text, 0, artist, 512);
433 get_text_line(&lyr_text, 1, artist, 512);
434 snprintf(buf, 512, "Lyrics %s - %s", artist, title);
435 return buf;
436 }*/
437 return "Lyrics";
438 }
440 static void
441 lyrics_paint(screen_t *screen, mpdclient_t *c)
442 {
443 lw->clear = 1;
444 list_window_paint(lw, list_callback, NULL);
445 wrefresh(lw->w);
446 }
448 static void
449 lyrics_update(screen_t *screen, mpdclient_t *c)
450 {
451 if( lw->repaint )
452 {
453 list_window_paint(lw, list_callback, NULL);
454 wrefresh(lw->w);
455 lw->repaint = 0;
456 }
457 }
460 static int
461 lyrics_cmd(screen_t *screen, mpdclient_t *c, command_t cmd)
462 {
463 lw->repaint=1;
464 switch(cmd)
465 {
466 case CMD_LIST_NEXT:
467 if( lw->start+lw->rows < lyr_text.lines->len+1 )
468 lw->start++;
469 return 1;
470 case CMD_LIST_PREVIOUS:
471 if( lw->start >0 )
472 lw->start--;
473 return 1;
474 case CMD_LIST_FIRST:
475 lw->start = 0;
476 return 1;
477 case CMD_LIST_LAST:
478 lw->start = lyrics_text_rows-lw->rows;
479 if( lw->start<0 )
480 lw->start = 0;
481 return 1;
482 case CMD_LIST_NEXT_PAGE:
483 lw->start = lw->start + lw->rows-1;
484 if( lw->start+lw->rows >= lyr_text.lines->len+1 )
485 lw->start = lyr_text.lines->len-lw->rows+1;
486 if( lw->start<0 )
487 lw->start = 0;
488 return 1;
489 case CMD_LIST_PREVIOUS_PAGE:
490 lw->start = lw->start - lw->rows;
491 if( lw->start<0 )
492 lw->start = 0;
493 return 1;
494 case CMD_SELECT:
495 g_thread_create(get_lyr, c, FALSE, NULL);
496 return 1;
497 default:
498 break;
499 }
501 lw->selected = lw->start+lw->rows;
502 if( screen_find(screen, c,
503 lw, lyrics_text_rows,
504 cmd, list_callback, NULL) )
505 {
506 /* center the row */
507 lw->start = lw->selected-(lw->rows/2);
508 if( lw->start+lw->rows > lyrics_text_rows )
509 lw->start = lyrics_text_rows-lw->rows;
510 if( lw->start<0 )
511 lw->start=0;
512 return 1;
513 }
515 return 0;
516 }
518 static list_window_t *
519 lyrics_lw(void)
520 {
521 return lw;
522 }
524 screen_functions_t *
525 get_screen_lyrics(void)
526 {
527 static screen_functions_t functions;
529 memset(&functions, 0, sizeof(screen_functions_t));
530 functions.init = lyrics_init;
531 functions.exit = lyrics_exit;
532 functions.open = NULL;
533 functions.close = NULL;
534 functions.resize = lyrics_resize;
535 functions.paint = lyrics_paint;
536 functions.update = lyrics_update;
537 functions.cmd = lyrics_cmd;
538 functions.get_lw = lyrics_lw;
539 functions.get_title = lyrics_title;
541 return &functions;
542 }
543 #endif /* ENABLE_LYRICS_SCREEN */