Code

Merge remote branches 'jn/cosmetics', 'jn/doxygen' and 'jn/renames'
[ncmpc.git] / src / list_window.c
1 /* ncmpc (Ncurses MPD Client)
2  * (c) 2004-2010 The Music Player Daemon Project
3  * Project homepage: http://musicpd.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  *
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 "paint.h"
28 #include "screen_status.h"
29 #include "i18n.h"
31 #include <assert.h>
32 #include <stdlib.h>
33 #include <unistd.h>
34 #include <string.h>
36 extern void screen_bell(void);
38 struct list_window *
39 list_window_init(WINDOW *w, unsigned width, unsigned height)
40 {
41         struct list_window *lw;
43         lw = g_malloc0(sizeof(*lw));
44         lw->w = w;
45         lw->cols = width;
46         lw->rows = height;
47         lw->range_selection = false;
48         return lw;
49 }
51 void
52 list_window_free(struct list_window *lw)
53 {
54         assert(lw != NULL);
56         g_free(lw);
57 }
59 void
60 list_window_reset(struct list_window *lw)
61 {
62         lw->selected = 0;
63         lw->range_selection = false;
64         lw->range_base = 0;
65         lw->start = 0;
66 }
68 static unsigned
69 list_window_validate_index(const struct list_window *lw, unsigned i)
70 {
71         if (lw->length == 0)
72                 return 0;
73         else if (i >= lw->length)
74                 return lw->length - 1;
75         else
76                 return i;
77 }
79 static void
80 list_window_check_selected(struct list_window *lw)
81 {
82         lw->selected = list_window_validate_index(lw, lw->selected);
84         if(lw->range_selection)
85                 lw->range_base =
86                         list_window_validate_index(lw, lw->range_base);
87 }
89 /**
90  * Scroll after the cursor was moved, the list was changed or the
91  * window was resized.
92  */
93 static void
94 list_window_check_origin(struct list_window *lw)
95 {
96         list_window_scroll_to(lw, lw->selected);
97 }
99 void
100 list_window_resize(struct list_window *lw, unsigned width, unsigned height)
102         lw->cols = width;
103         lw->rows = height;
105         list_window_check_origin(lw);
108 void
109 list_window_set_length(struct list_window *lw, unsigned length)
111         if (length == lw->length)
112                 return;
114         lw->length = length;
116         list_window_check_selected(lw);
117         list_window_check_origin(lw);
120 void
121 list_window_center(struct list_window *lw, unsigned n)
123         if (n > lw->rows / 2)
124                 lw->start = n - lw->rows / 2;
125         else
126                 lw->start = 0;
128         if (lw->start + lw->rows > lw->length) {
129                 if (lw->rows < lw->length)
130                         lw->start = lw->length - lw->rows;
131                 else
132                         lw->start = 0;
133         }
136 void
137 list_window_scroll_to(struct list_window *lw, unsigned n)
139         int start = lw->start;
141         if ((unsigned) options.scroll_offset * 2 >= lw->rows)
142                 // Center if the offset is more than half the screen
143                 start = n - lw->rows / 2;
144         else {
145                 if (n < lw->start + options.scroll_offset)
146                         start = n - options.scroll_offset;
148                 if (n >= lw->start + lw->rows - options.scroll_offset)
149                         start = n - lw->rows + 1 + options.scroll_offset;
150         }
152         if (start + lw->rows > lw->length)
153                 start = lw->length - lw->rows;
155         if (start < 0 || lw->length == 0)
156                 start = 0;
158         lw->start = start;
161 void
162 list_window_set_cursor(struct list_window *lw, unsigned i)
164         lw->range_selection = false;
165         lw->selected = i;
167         list_window_check_selected(lw);
168         list_window_check_origin(lw);
171 void
172 list_window_move_cursor(struct list_window *lw, unsigned n)
174         lw->selected = n;
176         list_window_check_selected(lw);
177         list_window_check_origin(lw);
180 void
181 list_window_fetch_cursor(struct list_window *lw)
183         if (lw->start > 0 &&
184             lw->selected < lw->start + options.scroll_offset)
185                 list_window_move_cursor(lw, lw->start + options.scroll_offset);
186         else if (lw->start + lw->rows < lw->length &&
187                  lw->selected > lw->start + lw->rows - 1 - options.scroll_offset)
188                 list_window_move_cursor(lw, lw->start + lw->rows - 1 - options.scroll_offset);
191 void
192 list_window_get_range(const struct list_window *lw,
193                       struct list_window_range *range)
195         if (lw->length == 0) {
196                 /* empty list - no selection */
197                 range->start = 0;
198                 range->end = 0;
199         } else if (lw->range_selection) {
200                 /* a range selection */
201                 if (lw->range_base < lw->selected) {
202                         range->start = lw->range_base;
203                         range->end = lw->selected + 1;
204                 } else {
205                         range->start = lw->selected;
206                         range->end = lw->range_base + 1;
207                 }
208         } else {
209                 /* no range, just the cursor */
210                 range->start = lw->selected;
211                 range->end = lw->selected + 1;
212         }
215 static void
216 list_window_next(struct list_window *lw)
218         if (lw->selected + 1 < lw->length)
219                 list_window_move_cursor(lw, lw->selected + 1);
220         else if (options.list_wrap)
221                 list_window_move_cursor(lw, 0);
224 static void
225 list_window_previous(struct list_window *lw)
227         if (lw->selected > 0)
228                 list_window_move_cursor(lw, lw->selected - 1);
229         else if (options.list_wrap)
230                 list_window_move_cursor(lw, lw->length - 1);
233 static void
234 list_window_top(struct list_window *lw)
236         if (lw->start == 0)
237                 list_window_move_cursor(lw, lw->start);
238         else
239                 if ((unsigned) options.scroll_offset * 2 >= lw->rows)
240                         list_window_move_cursor(lw, lw->start + lw->rows / 2);
241                 else
242                         list_window_move_cursor(lw, lw->start + options.scroll_offset);
245 static void
246 list_window_middle(struct list_window *lw)
248         if (lw->length >= lw->rows)
249                 list_window_move_cursor(lw, lw->start + lw->rows / 2);
250         else
251                 list_window_move_cursor(lw, lw->length / 2);
254 static void
255 list_window_bottom(struct list_window *lw)
257         if (lw->length >= lw->rows)
258                 if ((unsigned) options.scroll_offset * 2 >= lw->rows)
259                         list_window_move_cursor(lw, lw->start + lw->rows / 2);
260                 else
261                         if (lw->start + lw->rows == lw->length)
262                                 list_window_move_cursor(lw, lw->length - 1);
263                         else
264                                 list_window_move_cursor(lw, lw->start + lw->rows - 1 - options.scroll_offset);
265         else
266                 list_window_move_cursor(lw, lw->length - 1);
269 static void
270 list_window_first(struct list_window *lw)
272         list_window_move_cursor(lw, 0);
275 static void
276 list_window_last(struct list_window *lw)
278         if (lw->length > 0)
279                 list_window_move_cursor(lw, lw->length - 1);
280         else
281                 list_window_move_cursor(lw, 0);
284 static void
285 list_window_next_page(struct list_window *lw)
287         if (lw->rows < 2)
288                 return;
289         if (lw->selected + lw->rows < lw->length)
290                 list_window_move_cursor(lw, lw->selected + lw->rows - 1);
291         else
292                 list_window_last(lw);
295 static void
296 list_window_previous_page(struct list_window *lw)
298         if (lw->rows < 2)
299                 return;
300         if (lw->selected > lw->rows - 1)
301                 list_window_move_cursor(lw, lw->selected - lw->rows + 1);
302         else
303                 list_window_first(lw);
306 static void
307 list_window_scroll_up(struct list_window *lw, unsigned n)
309         if (lw->start > 0) {
310                 if (n > lw->start)
311                         lw->start = 0;
312                 else
313                         lw->start -= n;
315                 list_window_fetch_cursor(lw);
316         }
319 static void
320 list_window_scroll_down(struct list_window *lw, unsigned n)
322         if (lw->start + lw->rows < lw->length)
323         {
324                 if (lw->start + lw->rows + n > lw->length - 1)
325                         lw->start = lw->length - lw->rows;
326                 else
327                         lw->start += n;
329                 list_window_fetch_cursor(lw);
330         }
333 static void
334 list_window_paint_row(WINDOW *w, unsigned width, bool selected,
335                       const char *text)
337         row_paint_text(w, width, COLOR_LIST,
338                        selected, text);
341 void
342 list_window_paint(const struct list_window *lw,
343                   list_window_callback_fn_t callback,
344                   void *callback_data)
346         bool show_cursor = !lw->hide_cursor &&
347                 (!options.hardware_cursor || lw->range_selection);
348         struct list_window_range range;
350         if (show_cursor)
351                 list_window_get_range(lw, &range);
353         for (unsigned i = 0; i < lw->rows; i++) {
354                 const char *label;
356                 wmove(lw->w, i, 0);
358                 if (lw->start + i >= lw->length) {
359                         wclrtobot(lw->w);
360                         break;
361                 }
363                 label = callback(lw->start + i, callback_data);
364                 assert(label != NULL);
366                 list_window_paint_row(lw->w, lw->cols,
367                                       show_cursor &&
368                                       lw->start + i >= range.start &&
369                                       lw->start + i < range.end,
370                                       label);
371         }
373         row_color_end(lw->w);
375         if (options.hardware_cursor && lw->selected >= lw->start &&
376             lw->selected < lw->start + lw->rows) {
377                 curs_set(1);
378                 wmove(lw->w, lw->selected - lw->start, 0);
379         }
382 void
383 list_window_paint2(const struct list_window *lw,
384                    list_window_paint_callback_t paint_callback,
385                    void *callback_data)
387         bool show_cursor = !lw->hide_cursor &&
388                 (!options.hardware_cursor || lw->range_selection);
389         struct list_window_range range;
391         if (show_cursor)
392                 list_window_get_range(lw, &range);
394         for (unsigned i = 0; i < lw->rows; i++) {
395                 bool selected;
397                 wmove(lw->w, i, 0);
399                 if (lw->start + i >= lw->length) {
400                         wclrtobot(lw->w);
401                         break;
402                 }
404                 selected = show_cursor &&
405                         lw->start + i >= range.start &&
406                         lw->start + i < range.end;
408                 paint_callback(lw->w, lw->start + i, i, lw->cols,
409                                selected, callback_data);
410         }
412         if (options.hardware_cursor && lw->selected >= lw->start &&
413             lw->selected < lw->start + lw->rows) {
414                 curs_set(1);
415                 wmove(lw->w, lw->selected - lw->start, 0);
416         }
419 bool
420 list_window_find(struct list_window *lw,
421                  list_window_callback_fn_t callback,
422                  void *callback_data,
423                  const char *str,
424                  bool wrap,
425                  bool bell_on_wrap)
427         unsigned i = lw->selected + 1;
428         const char *label;
430         assert(str != NULL);
432         do {
433                 while (i < lw->length) {
434                         label = callback(i, callback_data);
435                         assert(label != NULL);
437                         if (match_line(label, str)) {
438                                 list_window_move_cursor(lw, i);
439                                 return true;
440                         }
441                         if (wrap && i == lw->selected)
442                                 return false;
443                         i++;
444                 }
445                 if (wrap) {
446                         if (i == 0) /* empty list */
447                                 return 1;
448                         i=0; /* first item */
449                         if (bell_on_wrap) {
450                                 screen_bell();
451                         }
452                 }
453         } while (wrap);
455         return false;
458 bool
459 list_window_rfind(struct list_window *lw,
460                   list_window_callback_fn_t callback,
461                   void *callback_data,
462                   const char *str,
463                   bool wrap,
464                   bool bell_on_wrap)
466         int i = lw->selected - 1;
467         const char *label;
469         assert(str != NULL);
471         if (lw->length == 0)
472                 return false;
474         do {
475                 while (i >= 0) {
476                         label = callback(i, callback_data);
477                         assert(label != NULL);
479                         if (match_line(label, str)) {
480                                 list_window_move_cursor(lw, i);
481                                 return true;
482                         }
483                         if (wrap && i == (int)lw->selected)
484                                 return false;
485                         i--;
486                 }
487                 if (wrap) {
488                         i = lw->length - 1; /* last item */
489                         if (bell_on_wrap) {
490                                 screen_bell();
491                         }
492                 }
493         } while (wrap);
495         return false;
498 #ifdef NCMPC_MINI
499 bool
500 list_window_jump(struct list_window *lw,
501                  list_window_callback_fn_t callback,
502                  void *callback_data,
503                  const char *str)
505         unsigned i;
506         const char *label;
508         assert(str != NULL);
510         for (i = 0; i < lw->length; i++) {
511                 label = callback(i, callback_data);
512                 assert(label != NULL);
514                 if (g_ascii_strncasecmp(label, str, strlen(str)) == 0) {
515                         list_window_move_cursor(lw, i);
516                         return true;
517                 }
518         }
519         return false;
521 #else
522 bool
523 list_window_jump(struct list_window *lw,
524                  list_window_callback_fn_t callback,
525                  void *callback_data,
526                  const char *str)
528         unsigned i;
529         const char *label;
530         GRegex *regex;
532         assert(str != NULL);
534         regex = compile_regex(str, options.jump_prefix_only);
535         if (regex == NULL)
536                 return false;
538         for (i = 0; i < lw->length; i++) {
539                 label = callback(i, callback_data);
540                 assert(label != NULL);
542                 if (match_regex(regex, label)) {
543                         g_regex_unref(regex);
544                         list_window_move_cursor(lw, i);
545                         return true;
546                 }
547         }
548         g_regex_unref(regex);
549         return false;
551 #endif
553 /* perform basic list window commands (movement) */
554 bool
555 list_window_cmd(struct list_window *lw, command_t cmd)
557         switch (cmd) {
558         case CMD_LIST_PREVIOUS:
559                 list_window_previous(lw);
560                 break;
561         case CMD_LIST_NEXT:
562                 list_window_next(lw);
563                 break;
564         case CMD_LIST_TOP:
565                 list_window_top(lw);
566                 break;
567         case CMD_LIST_MIDDLE:
568                 list_window_middle(lw);
569                 break;
570         case CMD_LIST_BOTTOM:
571                 list_window_bottom(lw);
572                 break;
573         case CMD_LIST_FIRST:
574                 list_window_first(lw);
575                 break;
576         case CMD_LIST_LAST:
577                 list_window_last(lw);
578                 break;
579         case CMD_LIST_NEXT_PAGE:
580                 list_window_next_page(lw);
581                 break;
582         case CMD_LIST_PREVIOUS_PAGE:
583                 list_window_previous_page(lw);
584                 break;
585         case CMD_LIST_RANGE_SELECT:
586                 if(lw->range_selection)
587                 {
588                         screen_status_printf(_("Range selection disabled"));
589                         list_window_set_cursor(lw, lw->selected);
590                 }
591                 else
592                 {
593                         screen_status_printf(_("Range selection enabled"));
594                         lw->range_base = lw->selected;
595                         lw->range_selection = true;
596                 }
597                 break;
598         case CMD_LIST_SCROLL_UP_LINE:
599                 list_window_scroll_up(lw, 1);
600                 break;
601         case CMD_LIST_SCROLL_DOWN_LINE:
602                 list_window_scroll_down(lw, 1);
603                 break;
604         case CMD_LIST_SCROLL_UP_HALF:
605                 list_window_scroll_up(lw, (lw->rows - 1) / 2);
606                 break;
607         case CMD_LIST_SCROLL_DOWN_HALF:
608                 list_window_scroll_down(lw, (lw->rows - 1) / 2);
609                 break;
610         default:
611                 return false;
612         }
614         return true;
617 bool
618 list_window_scroll_cmd(struct list_window *lw, command_t cmd)
620         switch (cmd) {
621         case CMD_LIST_SCROLL_UP_LINE:
622         case CMD_LIST_PREVIOUS:
623                 if (lw->start > 0)
624                         lw->start--;
625                 break;
627         case CMD_LIST_SCROLL_DOWN_LINE:
628         case CMD_LIST_NEXT:
629                 if (lw->start + lw->rows < lw->length)
630                         lw->start++;
631                 break;
633         case CMD_LIST_FIRST:
634                 lw->start = 0;
635                 break;
637         case CMD_LIST_LAST:
638                 if (lw->length > lw->rows)
639                         lw->start = lw->length - lw->rows;
640                 else
641                         lw->start = 0;
642                 break;
644         case CMD_LIST_NEXT_PAGE:
645                 lw->start += lw->rows;
646                 if (lw->start + lw->rows > lw->length) {
647                         if (lw->length > lw->rows)
648                                 lw->start = lw->length - lw->rows;
649                         else
650                                 lw->start = 0;
651                 }
652                 break;
654         case CMD_LIST_PREVIOUS_PAGE:
655                 if (lw->start > lw->rows)
656                         lw->start -= lw->rows;
657                 else
658                         lw->start = 0;
659                 break;
661         case CMD_LIST_SCROLL_UP_HALF:
662                 if (lw->start > (lw->rows - 1) / 2)
663                         lw->start -= (lw->rows - 1) / 2;
664                 else
665                         lw->start = 0;
666                 break;
668         case CMD_LIST_SCROLL_DOWN_HALF:
669                 lw->start += (lw->rows - 1) / 2;
670                 if (lw->start + lw->rows > lw->length) {
671                         if (lw->length > lw->rows)
672                                 lw->start = lw->length - lw->rows;
673                         else
674                                 lw->start = 0;
675                 }
676                 break;
678         default:
679                 return false;
680         }
682         return true;
685 #ifdef HAVE_GETMOUSE
686 bool
687 list_window_mouse(struct list_window *lw, unsigned long bstate, int y)
689         assert(lw != NULL);
691         /* if the even occurred above the list window move up */
692         if (y < 0) {
693                 if (bstate & BUTTON3_CLICKED)
694                         list_window_first(lw);
695                 else
696                         list_window_previous_page(lw);
697                 return true;
698         }
700         /* if the even occurred below the list window move down */
701         if ((unsigned)y >= lw->length) {
702                 if (bstate & BUTTON3_CLICKED)
703                         list_window_last(lw);
704                 else
705                         list_window_next_page(lw);
706                 return true;
707         }
709         return false;
711 #endif