1 /* ncmpc (Ncurses MPD Client)
2 * (c) 2004-2009 The Music Player Daemon Project
3 * Project homepage: http://musicpd.org
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.
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.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
20 #include "list_window.h"
21 #include "config.h"
22 #include "options.h"
23 #include "charset.h"
24 #include "match.h"
25 #include "command.h"
26 #include "colors.h"
27 #include "screen_message.h"
28 #include "i18n.h"
30 #include <assert.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <string.h>
35 extern void screen_bell(void);
37 struct list_window *
38 list_window_init(WINDOW *w, unsigned width, unsigned height)
39 {
40 struct list_window *lw;
42 lw = g_malloc0(sizeof(list_window_t));
43 lw->w = w;
44 lw->cols = width;
45 lw->rows = height;
46 lw->range_selection = false;
47 return lw;
48 }
50 void
51 list_window_free(struct list_window *lw)
52 {
53 if (lw) {
54 memset(lw, 0, sizeof(list_window_t));
55 g_free(lw);
56 }
57 }
59 void
60 list_window_reset(struct list_window *lw)
61 {
62 lw->selected = 0;
63 lw->selected_start = 0;
64 lw->selected_end = 0;
65 lw->range_selection = false;
66 lw->range_base = 0;
67 lw->start = 0;
68 }
70 void
71 list_window_check_selected(struct list_window *lw, unsigned length)
72 {
73 if (lw->start + lw->rows > length) {
74 if (length > lw->rows)
75 lw->start = length - lw->rows;
76 else
77 lw->start = 0;
78 }
80 if (lw->selected < lw->start)
81 lw->selected = lw->start;
83 if (length == 0)
84 lw->selected = 0;
85 else if (lw->selected >= length)
86 lw->selected = length - 1;
88 if(lw->range_selection)
89 {
90 if (length == 0) {
91 lw->selected_start = 0;
92 lw->selected_end = 0;
93 lw->range_base = 0;
94 } else {
95 if (lw->selected_start >= length)
96 lw->selected_start = length - 1;
97 if (lw->selected_end >= length)
98 lw->selected_end = length - 1;
99 if (lw->range_base >= length)
100 lw->range_base = length - 1;
101 }
103 if(lw->range_base > lw->selected_end)
104 lw->selected_end = lw->selected;
105 if(lw->range_base < lw->selected_start)
106 lw->selected_start = lw->selected;
107 }
108 else
109 {
110 lw->selected_start = lw->selected;
111 lw->selected_end = lw->selected;
112 }
113 }
115 void
116 list_window_center(struct list_window *lw, unsigned rows, unsigned n)
117 {
118 if (n > lw->rows / 2)
119 lw->start = n - lw->rows / 2;
120 else
121 lw->start = 0;
123 if (lw->start + lw->rows > rows) {
124 if (lw->rows < rows)
125 lw->start = rows - lw->rows;
126 else
127 lw->start = 0;
128 }
129 }
131 void
132 list_window_set_selected(struct list_window *lw, unsigned n)
133 {
134 lw->selected = n;
135 if(lw->range_selection)
136 {
137 if(n >= lw->range_base)
138 {
139 lw->selected_end = n;
140 lw->selected_start = lw->range_base;
141 }
142 if(n <= lw->range_base)
143 {
144 lw->selected_start = n;
145 lw->selected_end = lw->range_base;
146 }
147 }
148 else
149 {
150 lw->selected_start = n;
151 lw->selected_end = n;
152 }
153 }
155 static void
156 list_window_next(struct list_window *lw, unsigned length)
157 {
158 if (lw->selected + 1 < length)
159 list_window_set_selected(lw, lw->selected + 1);
160 else if (options.list_wrap)
161 list_window_set_selected(lw, 0);
162 }
164 static void
165 list_window_previous(struct list_window *lw, unsigned length)
166 {
167 if (lw->selected > 0)
168 list_window_set_selected(lw, lw->selected - 1);
169 else if (options.list_wrap)
170 list_window_set_selected(lw, length-1);
171 }
173 static void
174 list_window_top(struct list_window *lw)
175 {
176 if (lw->start == 0)
177 list_window_set_selected(lw, lw->start);
178 else
179 if ((unsigned) options.scroll_offset * 2 >= lw->rows)
180 list_window_set_selected(lw, lw->start + lw->rows / 2);
181 else
182 list_window_set_selected(lw, lw->start + options.scroll_offset);
183 }
185 static void
186 list_window_middle(struct list_window *lw, unsigned length)
187 {
188 if (length >= lw->rows)
189 list_window_set_selected(lw, lw->start + lw->rows / 2);
190 else
191 list_window_set_selected(lw, length / 2);
192 }
194 static void
195 list_window_bottom(struct list_window *lw, unsigned length)
196 {
197 if (length >= lw->rows)
198 if ((unsigned) options.scroll_offset * 2 >= lw->rows)
199 list_window_set_selected(lw, lw->start + lw->rows / 2);
200 else
201 if (lw->start + lw->rows == length)
202 list_window_set_selected(lw, length - 1);
203 else
204 list_window_set_selected(lw, lw->start + lw->rows - 1 - options.scroll_offset);
205 else
206 list_window_set_selected(lw, length - 1);
207 }
209 static void
210 list_window_first(struct list_window *lw)
211 {
212 list_window_set_selected(lw, 0);
213 }
215 static void
216 list_window_last(struct list_window *lw, unsigned length)
217 {
218 if (length > 0)
219 list_window_set_selected(lw, length - 1);
220 else
221 list_window_set_selected(lw, 0);
222 }
224 static void
225 list_window_next_page(struct list_window *lw, unsigned length)
226 {
227 if (lw->rows < 2)
228 return;
229 if (lw->selected + lw->rows < length)
230 list_window_set_selected(lw, lw->selected + lw->rows - 1);
231 else
232 list_window_last(lw, length);
233 }
235 static void
236 list_window_previous_page(struct list_window *lw)
237 {
238 if (lw->rows < 2)
239 return;
240 if (lw->selected > lw->rows - 1)
241 list_window_set_selected(lw, lw->selected - lw->rows + 1);
242 else
243 list_window_first(lw);
244 }
246 static void
247 list_window_scroll_up(struct list_window *lw, unsigned n)
248 {
249 if (lw->start > 0) {
250 if (n > lw->start)
251 lw->start = 0;
252 else
253 lw->start -= n;
254 if (lw->selected > lw->start + lw->rows - 1 - options.scroll_offset) {
255 lw->selected = lw->start + lw->rows - 1 - options.scroll_offset;
256 if (lw->range_selection) {
257 if (lw->selected < lw->range_base) {
258 lw->selected_start = lw->selected;
259 lw->selected_end = lw->range_base;
260 } else {
261 lw->selected_end = lw->selected;
262 }
263 } else {
264 lw->selected_start = lw->selected;
265 lw->selected_end = lw->selected;
266 }
267 }
268 }
269 }
271 static void
272 list_window_scroll_down(struct list_window *lw, unsigned length, unsigned n)
273 {
274 if (lw->start + lw->rows < length)
275 {
276 if ( lw->start + lw->rows + n > length - 1)
277 lw->start = length - lw->rows;
278 else
279 lw->start += n;
280 if (lw->selected < lw->start + options.scroll_offset) {
281 lw->selected = lw->start + options.scroll_offset;
282 if (lw->range_selection) {
283 if (lw->selected > lw->range_base) {
284 lw->selected_end = lw->selected;
285 lw->selected_start = lw->range_base;
286 } else {
287 lw->selected_start = lw->selected;
288 }
289 } else {
290 lw->selected_start = lw->selected;
291 lw->selected_end = lw->selected;
292 }
293 }
294 }
295 }
297 void
298 list_window_paint(struct list_window *lw,
299 list_window_callback_fn_t callback,
300 void *callback_data)
301 {
302 unsigned i;
303 bool fill = options.wide_cursor;
304 bool show_cursor = !lw->hide_cursor;
305 bool highlight = false;
307 if (show_cursor) {
308 int start = lw->start;
309 if ((unsigned) options.scroll_offset * 2 >= lw->rows)
310 // Center if the offset is more than half the screen
311 start = lw->selected - lw->rows / 2;
312 else
313 {
314 if (lw->selected < lw->start + options.scroll_offset)
315 start = lw->selected - options.scroll_offset;
317 if (lw->selected >= lw->start + lw->rows - options.scroll_offset)
318 {
319 start = lw->selected - lw->rows + 1 + options.scroll_offset;
320 }
321 }
322 if (start < 0)
323 lw->start = 0;
324 else
325 {
326 while ( start > 0 && callback(start + lw->rows - 1, &highlight, NULL, callback_data) == NULL)
327 start--;
328 lw->start = start;
329 }
330 }
332 for (i = 0; i < lw->rows; i++) {
333 const char *label;
334 char *second_column = NULL;
335 highlight = false;
337 label = callback(lw->start + i, &highlight, &second_column, callback_data);
338 wmove(lw->w, i, 0);
340 if (label) {
341 bool selected = (lw->start + i >= lw->selected_start && lw->start + i <= lw->selected_end);
342 unsigned len = utf8_width(label);
344 if (highlight)
345 colors_use(lw->w, COLOR_LIST_BOLD);
346 else
347 colors_use(lw->w, COLOR_LIST);
349 if (show_cursor && selected &&
350 (!options.hardware_cursor || lw->range_selection))
351 wattron(lw->w, A_REVERSE);
353 //waddnstr(lw->w, label, lw->cols);
354 waddstr(lw->w, label);
355 if (fill && len < lw->cols)
356 whline(lw->w, ' ', lw->cols-len);
358 if(second_column)
359 {
360 unsigned sc_len = utf8_width(second_column) + 1;
361 if(lw->cols > sc_len)
362 {
363 wmove(lw->w, i, lw->cols - sc_len);
364 waddstr(lw->w, " ");
365 wmove(lw->w, i, lw->cols - sc_len + 1);
366 waddstr(lw->w, second_column);
367 }
368 g_free(second_column);
369 }
371 if (selected)
372 wattroff(lw->w, A_REVERSE);
374 if (!fill && len < lw->cols)
375 wclrtoeol(lw->w);
376 } else
377 wclrtoeol(lw->w);
378 }
380 if (options.hardware_cursor && lw->selected >= lw->start &&
381 lw->selected < lw->start + lw->rows) {
382 curs_set(1);
383 wmove(lw->w, lw->selected - lw->start, 0);
384 }
385 }
387 bool
388 list_window_find(struct list_window *lw,
389 list_window_callback_fn_t callback,
390 void *callback_data,
391 const char *str,
392 bool wrap,
393 bool bell_on_wrap)
394 {
395 bool h;
396 unsigned i = lw->selected + 1;
397 const char *label;
399 do {
400 while ((label = callback(i,&h,NULL,callback_data))) {
401 if (str && label && match_line(label, str)) {
402 lw->selected = i;
403 if(!lw->range_selection || i > lw->selected_end)
404 lw->selected_end = i;
405 if(!lw->range_selection || i < lw->selected_start)
406 lw->selected_start = i;
407 return true;
408 }
409 if (wrap && i == lw->selected)
410 return false;
411 i++;
412 }
413 if (wrap) {
414 if (i == 0) /* empty list */
415 return 1;
416 i=0; /* first item */
417 if (bell_on_wrap) {
418 screen_bell();
419 }
420 }
421 } while (wrap);
423 return false;
424 }
426 bool
427 list_window_rfind(struct list_window *lw,
428 list_window_callback_fn_t callback,
429 void *callback_data,
430 const char *str,
431 bool wrap,
432 bool bell_on_wrap,
433 unsigned rows)
434 {
435 bool h;
436 int i = lw->selected - 1;
437 const char *label;
439 if (rows == 0)
440 return false;
442 do {
443 while (i >= 0 && (label = callback(i,&h,NULL,callback_data))) {
444 if( str && label && match_line(label, str) ) {
445 lw->selected = i;
446 if(!lw->range_selection || i > (int)lw->selected_end)
447 lw->selected_end = i;
448 if(!lw->range_selection || i < (int)lw->selected_start)
449 lw->selected_start = i;
450 return true;
451 }
452 if (wrap && i == (int)lw->selected)
453 return false;
454 i--;
455 }
456 if (wrap) {
457 i = rows - 1; /* last item */
458 if (bell_on_wrap) {
459 screen_bell();
460 }
461 }
462 } while (wrap);
464 return false;
465 }
467 bool
468 list_window_jump(struct list_window *lw,
469 list_window_callback_fn_t callback,
470 void *callback_data,
471 const char *str)
472 {
473 bool h;
474 unsigned i = 0;
475 const char *label;
477 while ((label = callback(i,&h,NULL,callback_data))) {
478 if (label && label[0] == '[')
479 label++;
480 #ifndef NCMPC_MINI
481 if (str && label &&
482 ((options.jump_prefix_only && g_ascii_strncasecmp(label, str, strlen(str)) == 0) ||
483 (!options.jump_prefix_only && match_line(label, str))) )
484 #else
485 if (str && label && g_ascii_strncasecmp(label, str, strlen(str)) == 0)
486 #endif
487 {
488 lw->selected = i;
489 if(!lw->range_selection || i > lw->selected_end)
490 lw->selected_end = i;
491 if(!lw->range_selection || i < lw->selected_start)
492 lw->selected_start = i;
493 return true;
494 }
495 i++;
496 }
497 return false;
498 }
500 /* perform basic list window commands (movement) */
501 bool
502 list_window_cmd(struct list_window *lw, unsigned rows, command_t cmd)
503 {
504 switch (cmd) {
505 case CMD_LIST_PREVIOUS:
506 list_window_previous(lw, rows);
507 break;
508 case CMD_LIST_NEXT:
509 list_window_next(lw, rows);
510 break;
511 case CMD_LIST_TOP:
512 list_window_top(lw);
513 break;
514 case CMD_LIST_MIDDLE:
515 list_window_middle(lw,rows);
516 break;
517 case CMD_LIST_BOTTOM:
518 list_window_bottom(lw,rows);
519 break;
520 case CMD_LIST_FIRST:
521 list_window_first(lw);
522 break;
523 case CMD_LIST_LAST:
524 list_window_last(lw, rows);
525 break;
526 case CMD_LIST_NEXT_PAGE:
527 list_window_next_page(lw, rows);
528 break;
529 case CMD_LIST_PREVIOUS_PAGE:
530 list_window_previous_page(lw);
531 break;
532 case CMD_LIST_RANGE_SELECT:
533 if(lw->range_selection)
534 {
535 screen_status_printf(_("Range selection disabled"));
536 lw->range_selection = false;
537 list_window_set_selected(lw, lw->selected);
538 }
539 else
540 {
541 screen_status_printf(_("Range selection enabled"));
542 lw->range_base = lw->selected;
543 lw->range_selection = true;
544 }
545 break;
546 case CMD_LIST_SCROLL_UP_LINE:
547 list_window_scroll_up(lw, 1);
548 break;
549 case CMD_LIST_SCROLL_DOWN_LINE:
550 list_window_scroll_down(lw, rows, 1);
551 break;
552 case CMD_LIST_SCROLL_UP_HALF:
553 list_window_scroll_up(lw, (lw->rows - 1) / 2);
554 break;
555 case CMD_LIST_SCROLL_DOWN_HALF:
556 list_window_scroll_down(lw, rows, (lw->rows - 1) / 2);
557 break;
558 default:
559 return false;
560 }
562 return true;
563 }
565 bool
566 list_window_scroll_cmd(struct list_window *lw, unsigned rows, command_t cmd)
567 {
568 switch (cmd) {
569 case CMD_LIST_SCROLL_UP_LINE:
570 case CMD_LIST_PREVIOUS:
571 if (lw->start > 0)
572 lw->start--;
573 break;
575 case CMD_LIST_SCROLL_DOWN_LINE:
576 case CMD_LIST_NEXT:
577 if (lw->start + lw->rows < rows)
578 lw->start++;
579 break;
581 case CMD_LIST_FIRST:
582 lw->start = 0;
583 break;
585 case CMD_LIST_LAST:
586 if (rows > lw->rows)
587 lw->start = rows - lw->rows;
588 else
589 lw->start = 0;
590 break;
592 case CMD_LIST_NEXT_PAGE:
593 lw->start += lw->rows - 1;
594 if (lw->start + lw->rows > rows) {
595 if (rows > lw->rows)
596 lw->start = rows - lw->rows;
597 else
598 lw->start = 0;
599 }
600 break;
602 case CMD_LIST_PREVIOUS_PAGE:
603 if (lw->start > lw->rows)
604 lw->start -= lw->rows;
605 else
606 lw->start = 0;
607 break;
609 case CMD_LIST_SCROLL_UP_HALF:
610 if (lw->start > (lw->rows - 1) / 2)
611 lw->start -= (lw->rows - 1) / 2;
612 else
613 lw->start = 0;
614 break;
616 case CMD_LIST_SCROLL_DOWN_HALF:
617 lw->start += (lw->rows - 1) / 2;
618 if (lw->start + lw->rows > rows) {
619 if (rows > lw->rows)
620 lw->start = rows - lw->rows;
621 else
622 lw->start = 0;
623 }
624 break;
626 default:
627 return false;
628 }
630 return true;
631 }
633 #ifdef HAVE_GETMOUSE
634 bool
635 list_window_mouse(struct list_window *lw, unsigned rows,
636 unsigned long bstate, int y)
637 {
638 assert(lw != NULL);
640 /* if the even occurred above the list window move up */
641 if (y < 0) {
642 if (bstate & BUTTON3_CLICKED)
643 list_window_first(lw);
644 else
645 list_window_previous_page(lw);
646 return true;
647 }
649 /* if the even occurred below the list window move down */
650 if ((unsigned)y >= rows) {
651 if (bstate & BUTTON3_CLICKED)
652 list_window_last(lw, rows);
653 else
654 list_window_next_page(lw, rows);
655 return true;
656 }
658 return false;
659 }
660 #endif