1// SPDX-License-Identifier: GPL-2.0
2#include "../util/string2.h"
3#include "../util/config.h"
4#include "libslang.h"
5#include "ui.h"
6#include "util.h"
7#include <linux/compiler.h>
8#include <linux/list.h>
9#include <linux/rbtree.h>
10#include <linux/string.h>
11#include <stdlib.h>
12#include <sys/ttydefaults.h>
13#include "browser.h"
14#include "helpline.h"
15#include "keysyms.h"
16#include "../util/color.h"
17#include <linux/ctype.h>
18#include <linux/zalloc.h>
19
20static int ui_browser__percent_color(struct ui_browser *browser,
21 double percent, bool current)
22{
23 if (current && (!browser->use_navkeypressed || browser->navkeypressed))
24 return HE_COLORSET_SELECTED;
25 if (percent >= MIN_RED)
26 return HE_COLORSET_TOP;
27 if (percent >= MIN_GREEN)
28 return HE_COLORSET_MEDIUM;
29 return HE_COLORSET_NORMAL;
30}
31
32int ui_browser__set_color(struct ui_browser *browser, int color)
33{
34 int ret = browser->current_color;
35 browser->current_color = color;
36 SLsmg_set_color(color);
37 return ret;
38}
39
40void ui_browser__set_percent_color(struct ui_browser *browser,
41 double percent, bool current)
42{
43 int color = ui_browser__percent_color(browser, percent, current);
44 ui_browser__set_color(browser, color);
45}
46
47void ui_browser__gotorc_title(struct ui_browser *browser, int y, int x)
48{
49 SLsmg_gotorc(browser->y + y, browser->x + x);
50}
51
52void ui_browser__gotorc(struct ui_browser *browser, int y, int x)
53{
54 SLsmg_gotorc(browser->y + y + browser->extra_title_lines, browser->x + x);
55}
56
57void ui_browser__write_nstring(struct ui_browser *browser __maybe_unused, const char *msg,
58 unsigned int width)
59{
60 SLsmg_write_nstring(msg, width);
61}
62
63void ui_browser__vprintf(struct ui_browser *browser __maybe_unused, const char *fmt, va_list args)
64{
65 SLsmg_vprintf(fmt, args);
66}
67
68void ui_browser__printf(struct ui_browser *browser __maybe_unused, const char *fmt, ...)
69{
70 va_list args;
71
72 va_start(args, fmt);
73 ui_browser__vprintf(browser, fmt, args);
74 va_end(args);
75}
76
77static struct list_head *
78ui_browser__list_head_filter_entries(struct ui_browser *browser,
79 struct list_head *pos)
80{
81 do {
82 if (!browser->filter || !browser->filter(browser, pos))
83 return pos;
84 pos = pos->next;
85 } while (pos != browser->entries);
86
87 return NULL;
88}
89
90static struct list_head *
91ui_browser__list_head_filter_prev_entries(struct ui_browser *browser,
92 struct list_head *pos)
93{
94 do {
95 if (!browser->filter || !browser->filter(browser, pos))
96 return pos;
97 pos = pos->prev;
98 } while (pos != browser->entries);
99
100 return NULL;
101}
102
103void ui_browser__list_head_seek(struct ui_browser *browser, off_t offset, int whence)
104{
105 struct list_head *head = browser->entries;
106 struct list_head *pos;
107
108 if (browser->nr_entries == 0)
109 return;
110
111 switch (whence) {
112 case SEEK_SET:
113 pos = ui_browser__list_head_filter_entries(browser, pos: head->next);
114 break;
115 case SEEK_CUR:
116 pos = browser->top;
117 break;
118 case SEEK_END:
119 pos = ui_browser__list_head_filter_prev_entries(browser, pos: head->prev);
120 break;
121 default:
122 return;
123 }
124
125 assert(pos != NULL);
126
127 if (offset > 0) {
128 while (offset-- != 0)
129 pos = ui_browser__list_head_filter_entries(browser, pos: pos->next);
130 } else {
131 while (offset++ != 0)
132 pos = ui_browser__list_head_filter_prev_entries(browser, pos: pos->prev);
133 }
134
135 browser->top = pos;
136}
137
138void ui_browser__rb_tree_seek(struct ui_browser *browser, off_t offset, int whence)
139{
140 struct rb_root *root = browser->entries;
141 struct rb_node *nd;
142
143 switch (whence) {
144 case SEEK_SET:
145 nd = rb_first(root);
146 break;
147 case SEEK_CUR:
148 nd = browser->top;
149 break;
150 case SEEK_END:
151 nd = rb_last(root);
152 break;
153 default:
154 return;
155 }
156
157 if (offset > 0) {
158 while (offset-- != 0)
159 nd = rb_next(nd);
160 } else {
161 while (offset++ != 0)
162 nd = rb_prev(nd);
163 }
164
165 browser->top = nd;
166}
167
168unsigned int ui_browser__rb_tree_refresh(struct ui_browser *browser)
169{
170 struct rb_node *nd;
171 int row = 0;
172
173 if (browser->top == NULL)
174 browser->top = rb_first(browser->entries);
175
176 nd = browser->top;
177
178 while (nd != NULL) {
179 ui_browser__gotorc(browser, y: row, x: 0);
180 browser->write(browser, nd, row);
181 if (++row == browser->rows)
182 break;
183 nd = rb_next(nd);
184 }
185
186 return row;
187}
188
189bool ui_browser__is_current_entry(struct ui_browser *browser, unsigned row)
190{
191 return browser->top_idx + row == browser->index;
192}
193
194void ui_browser__refresh_dimensions(struct ui_browser *browser)
195{
196 browser->width = SLtt_Screen_Cols - 1;
197 browser->height = browser->rows = SLtt_Screen_Rows - 2;
198 browser->rows -= browser->extra_title_lines;
199 browser->y = 1;
200 browser->x = 0;
201}
202
203void ui_browser__handle_resize(struct ui_browser *browser)
204{
205 ui__refresh_dimensions(force: false);
206 ui_browser__show(browser, title: browser->title, helpline: ui_helpline__current);
207 ui_browser__refresh(browser);
208}
209
210int ui_browser__warning(struct ui_browser *browser, int timeout,
211 const char *format, ...)
212{
213 va_list args;
214 char *text;
215 int key = 0, err;
216
217 va_start(args, format);
218 err = vasprintf(&text, format, args);
219 va_end(args);
220
221 if (err < 0) {
222 va_start(args, format);
223 ui_helpline__vpush(fmt: format, ap: args);
224 va_end(args);
225 } else {
226 while ((key = ui__question_window(title: "Warning!", text,
227 exit_msg: "Press any key...",
228 delay_secs: timeout)) == K_RESIZE)
229 ui_browser__handle_resize(browser);
230 free(text);
231 }
232
233 return key;
234}
235
236int ui_browser__help_window(struct ui_browser *browser, const char *text)
237{
238 int key;
239
240 while ((key = ui__help_window(text)) == K_RESIZE)
241 ui_browser__handle_resize(browser);
242
243 return key;
244}
245
246bool ui_browser__dialog_yesno(struct ui_browser *browser, const char *text)
247{
248 int key;
249
250 while ((key = ui__dialog_yesno(msg: text)) == K_RESIZE)
251 ui_browser__handle_resize(browser);
252
253 return key == K_ENTER || toupper(key) == 'Y';
254}
255
256void ui_browser__reset_index(struct ui_browser *browser)
257{
258 browser->index = browser->top_idx = 0;
259 browser->seek(browser, 0, SEEK_SET);
260}
261
262void __ui_browser__show_title(struct ui_browser *browser, const char *title)
263{
264 SLsmg_gotorc(0, 0);
265 ui_browser__set_color(browser, HE_COLORSET_ROOT);
266 ui_browser__write_nstring(browser, msg: title, width: browser->width + 1);
267}
268
269void ui_browser__show_title(struct ui_browser *browser, const char *title)
270{
271 mutex_lock(mtx: &ui__lock);
272 __ui_browser__show_title(browser, title);
273 mutex_unlock(mtx: &ui__lock);
274}
275
276int ui_browser__show(struct ui_browser *browser, const char *title,
277 const char *helpline, ...)
278{
279 int err;
280 va_list ap;
281
282 if (browser->refresh_dimensions == NULL)
283 browser->refresh_dimensions = ui_browser__refresh_dimensions;
284
285 browser->refresh_dimensions(browser);
286
287 mutex_lock(mtx: &ui__lock);
288 __ui_browser__show_title(browser, title);
289
290 browser->title = title;
291 zfree(&browser->helpline);
292
293 va_start(ap, helpline);
294 err = vasprintf(&browser->helpline, helpline, ap);
295 va_end(ap);
296 if (err > 0)
297 ui_helpline__push(msg: browser->helpline);
298 mutex_unlock(mtx: &ui__lock);
299 return err ? 0 : -1;
300}
301
302void ui_browser__hide(struct ui_browser *browser)
303{
304 mutex_lock(mtx: &ui__lock);
305 ui_helpline__pop();
306 zfree(&browser->helpline);
307 mutex_unlock(mtx: &ui__lock);
308}
309
310static void ui_browser__scrollbar_set(struct ui_browser *browser)
311{
312 int height = browser->height, h = 0, pct = 0,
313 col = browser->width,
314 row = 0;
315
316 if (browser->nr_entries > 1) {
317 pct = ((browser->index * (browser->height - 1)) /
318 (browser->nr_entries - 1));
319 }
320
321 SLsmg_set_char_set(1);
322
323 while (h < height) {
324 ui_browser__gotorc(browser, y: row++, x: col);
325 SLsmg_write_char(h == pct ? SLSMG_DIAMOND_CHAR : SLSMG_CKBRD_CHAR);
326 ++h;
327 }
328
329 SLsmg_set_char_set(0);
330}
331
332static int __ui_browser__refresh(struct ui_browser *browser)
333{
334 int row;
335 int width = browser->width;
336
337 row = browser->refresh(browser);
338 ui_browser__set_color(browser, HE_COLORSET_NORMAL);
339
340 if (!browser->use_navkeypressed || browser->navkeypressed)
341 ui_browser__scrollbar_set(browser);
342 else
343 width += 1;
344
345 SLsmg_fill_region(browser->y + row + browser->extra_title_lines, browser->x,
346 browser->rows - row, width, ' ');
347
348 if (browser->nr_entries == 0 && browser->no_samples_msg)
349 __ui__info_window(NULL, text: browser->no_samples_msg, NULL);
350 return 0;
351}
352
353int ui_browser__refresh(struct ui_browser *browser)
354{
355 mutex_lock(mtx: &ui__lock);
356 __ui_browser__refresh(browser);
357 mutex_unlock(mtx: &ui__lock);
358
359 return 0;
360}
361
362/*
363 * Here we're updating nr_entries _after_ we started browsing, i.e. we have to
364 * forget about any reference to any entry in the underlying data structure,
365 * that is why we do a SEEK_SET. Think about 'perf top' in the hists browser
366 * after an output_resort and hist decay.
367 */
368void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries)
369{
370 off_t offset = nr_entries - browser->nr_entries;
371
372 browser->nr_entries = nr_entries;
373
374 if (offset < 0) {
375 if (browser->top_idx < (u64)-offset)
376 offset = -browser->top_idx;
377
378 browser->index += offset;
379 browser->top_idx += offset;
380 }
381
382 browser->top = NULL;
383 browser->seek(browser, browser->top_idx, SEEK_SET);
384}
385
386int ui_browser__run(struct ui_browser *browser, int delay_secs)
387{
388 int err, key;
389
390 while (1) {
391 off_t offset;
392
393 mutex_lock(mtx: &ui__lock);
394 err = __ui_browser__refresh(browser);
395 SLsmg_refresh();
396 mutex_unlock(mtx: &ui__lock);
397 if (err < 0)
398 break;
399
400 key = ui__getch(delay_secs);
401
402 if (key == K_RESIZE) {
403 ui__refresh_dimensions(force: false);
404 browser->refresh_dimensions(browser);
405 __ui_browser__show_title(browser, title: browser->title);
406 ui_helpline__puts(msg: browser->helpline);
407 continue;
408 }
409
410 if (browser->use_navkeypressed && !browser->navkeypressed) {
411 if (key == K_DOWN || key == K_UP ||
412 (browser->columns && (key == K_LEFT || key == K_RIGHT)) ||
413 key == K_PGDN || key == K_PGUP ||
414 key == K_HOME || key == K_END ||
415 key == ' ') {
416 browser->navkeypressed = true;
417 continue;
418 } else
419 return key;
420 }
421
422 switch (key) {
423 case K_DOWN:
424 if (browser->index == browser->nr_entries - 1)
425 break;
426 ++browser->index;
427 if (browser->index == browser->top_idx + browser->rows) {
428 ++browser->top_idx;
429 browser->seek(browser, +1, SEEK_CUR);
430 }
431 break;
432 case K_UP:
433 if (browser->index == 0)
434 break;
435 --browser->index;
436 if (browser->index < browser->top_idx) {
437 --browser->top_idx;
438 browser->seek(browser, -1, SEEK_CUR);
439 }
440 break;
441 case K_RIGHT:
442 if (!browser->columns)
443 goto out;
444 if (browser->horiz_scroll < browser->columns - 1)
445 ++browser->horiz_scroll;
446 break;
447 case K_LEFT:
448 if (!browser->columns)
449 goto out;
450 if (browser->horiz_scroll != 0)
451 --browser->horiz_scroll;
452 break;
453 case K_PGDN:
454 case ' ':
455 if (browser->top_idx + browser->rows > browser->nr_entries - 1)
456 break;
457
458 offset = browser->rows;
459 if (browser->index + offset > browser->nr_entries - 1)
460 offset = browser->nr_entries - 1 - browser->index;
461 browser->index += offset;
462 browser->top_idx += offset;
463 browser->seek(browser, +offset, SEEK_CUR);
464 break;
465 case K_PGUP:
466 if (browser->top_idx == 0)
467 break;
468
469 if (browser->top_idx < browser->rows)
470 offset = browser->top_idx;
471 else
472 offset = browser->rows;
473
474 browser->index -= offset;
475 browser->top_idx -= offset;
476 browser->seek(browser, -offset, SEEK_CUR);
477 break;
478 case K_HOME:
479 ui_browser__reset_index(browser);
480 break;
481 case K_END:
482 offset = browser->rows - 1;
483 if (offset >= browser->nr_entries)
484 offset = browser->nr_entries - 1;
485
486 browser->index = browser->nr_entries - 1;
487 browser->top_idx = browser->index - offset;
488 browser->seek(browser, -offset, SEEK_END);
489 break;
490 default:
491 out:
492 return key;
493 }
494 }
495 return -1;
496}
497
498unsigned int ui_browser__list_head_refresh(struct ui_browser *browser)
499{
500 struct list_head *pos;
501 struct list_head *head = browser->entries;
502 int row = 0;
503
504 if (browser->top == NULL || browser->top == browser->entries)
505 browser->top = ui_browser__list_head_filter_entries(browser, pos: head->next);
506
507 pos = browser->top;
508
509 list_for_each_from(pos, head) {
510 if (!browser->filter || !browser->filter(browser, pos)) {
511 ui_browser__gotorc(browser, y: row, x: 0);
512 browser->write(browser, pos, row);
513 if (++row == browser->rows)
514 break;
515 }
516 }
517
518 return row;
519}
520
521static struct ui_browser_colorset {
522 const char *name, *fg, *bg;
523 int colorset;
524} ui_browser__colorsets[] = {
525 {
526 .colorset = HE_COLORSET_TOP,
527 .name = "top",
528 .fg = "red",
529 .bg = "default",
530 },
531 {
532 .colorset = HE_COLORSET_MEDIUM,
533 .name = "medium",
534 .fg = "green",
535 .bg = "default",
536 },
537 {
538 .colorset = HE_COLORSET_NORMAL,
539 .name = "normal",
540 .fg = "default",
541 .bg = "default",
542 },
543 {
544 .colorset = HE_COLORSET_SELECTED,
545 .name = "selected",
546 .fg = "black",
547 .bg = "yellow",
548 },
549 {
550 .colorset = HE_COLORSET_JUMP_ARROWS,
551 .name = "jump_arrows",
552 .fg = "blue",
553 .bg = "default",
554 },
555 {
556 .colorset = HE_COLORSET_ADDR,
557 .name = "addr",
558 .fg = "magenta",
559 .bg = "default",
560 },
561 {
562 .colorset = HE_COLORSET_ROOT,
563 .name = "root",
564 .fg = "white",
565 .bg = "blue",
566 },
567 {
568 .name = NULL,
569 }
570};
571
572
573static int ui_browser__color_config(const char *var, const char *value,
574 void *data __maybe_unused)
575{
576 char *fg = NULL, *bg;
577 int i;
578
579 /* same dir for all commands */
580 if (!strstarts(str: var, prefix: "colors.") != 0)
581 return 0;
582
583 for (i = 0; ui_browser__colorsets[i].name != NULL; ++i) {
584 const char *name = var + 7;
585
586 if (strcmp(ui_browser__colorsets[i].name, name) != 0)
587 continue;
588
589 fg = strdup(value);
590 if (fg == NULL)
591 break;
592
593 bg = strchr(fg, ',');
594 if (bg == NULL)
595 break;
596
597 *bg = '\0';
598 bg = skip_spaces(bg + 1);
599 ui_browser__colorsets[i].bg = bg;
600 ui_browser__colorsets[i].fg = fg;
601 return 0;
602 }
603
604 free(fg);
605 return -1;
606}
607
608void ui_browser__argv_seek(struct ui_browser *browser, off_t offset, int whence)
609{
610 switch (whence) {
611 case SEEK_SET:
612 browser->top = browser->entries;
613 break;
614 case SEEK_CUR:
615 browser->top = (char **)browser->top + offset;
616 break;
617 case SEEK_END:
618 browser->top = (char **)browser->entries + browser->nr_entries - 1 + offset;
619 break;
620 default:
621 return;
622 }
623 assert((char **)browser->top < (char **)browser->entries + browser->nr_entries);
624 assert((char **)browser->top >= (char **)browser->entries);
625}
626
627unsigned int ui_browser__argv_refresh(struct ui_browser *browser)
628{
629 unsigned int row = 0, idx = browser->top_idx;
630 char **pos;
631
632 if (browser->top == NULL)
633 browser->top = browser->entries;
634
635 pos = (char **)browser->top;
636 while (idx < browser->nr_entries &&
637 row < (unsigned)SLtt_Screen_Rows - 1) {
638 assert(pos < (char **)browser->entries + browser->nr_entries);
639 if (!browser->filter || !browser->filter(browser, *pos)) {
640 ui_browser__gotorc(browser, y: row, x: 0);
641 browser->write(browser, pos, row);
642 if (++row == browser->rows)
643 break;
644 }
645
646 ++idx;
647 ++pos;
648 }
649
650 return row;
651}
652
653void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
654 u16 start, u16 end)
655{
656 SLsmg_set_char_set(1);
657 ui_browser__gotorc(browser, y: start, x: column);
658 SLsmg_draw_vline(end - start + 1);
659 SLsmg_set_char_set(0);
660}
661
662void ui_browser__write_graph(struct ui_browser *browser __maybe_unused,
663 int graph)
664{
665 SLsmg_set_char_set(1);
666 SLsmg_write_char(graph);
667 SLsmg_set_char_set(0);
668}
669
670static void __ui_browser__line_arrow_up(struct ui_browser *browser,
671 unsigned int column,
672 u64 start, u64 end)
673{
674 unsigned int row, end_row;
675
676 SLsmg_set_char_set(1);
677
678 if (start < browser->top_idx + browser->rows) {
679 row = start - browser->top_idx;
680 ui_browser__gotorc(browser, y: row, x: column);
681 SLsmg_write_char(SLSMG_LLCORN_CHAR);
682 ui_browser__gotorc(browser, y: row, x: column + 1);
683 SLsmg_draw_hline(2);
684
685 if (row-- == 0)
686 goto out;
687 } else
688 row = browser->rows - 1;
689
690 if (end > browser->top_idx)
691 end_row = end - browser->top_idx;
692 else
693 end_row = 0;
694
695 ui_browser__gotorc(browser, y: end_row, x: column);
696 SLsmg_draw_vline(row - end_row + 1);
697
698 ui_browser__gotorc(browser, y: end_row, x: column);
699 if (end >= browser->top_idx) {
700 SLsmg_write_char(SLSMG_ULCORN_CHAR);
701 ui_browser__gotorc(browser, y: end_row, x: column + 1);
702 SLsmg_write_char(SLSMG_HLINE_CHAR);
703 ui_browser__gotorc(browser, y: end_row, x: column + 2);
704 SLsmg_write_char(SLSMG_RARROW_CHAR);
705 }
706out:
707 SLsmg_set_char_set(0);
708}
709
710static void __ui_browser__line_arrow_down(struct ui_browser *browser,
711 unsigned int column,
712 u64 start, u64 end)
713{
714 unsigned int row, end_row;
715
716 SLsmg_set_char_set(1);
717
718 if (start >= browser->top_idx) {
719 row = start - browser->top_idx;
720 ui_browser__gotorc(browser, y: row, x: column);
721 SLsmg_write_char(SLSMG_ULCORN_CHAR);
722 ui_browser__gotorc(browser, y: row, x: column + 1);
723 SLsmg_draw_hline(2);
724
725 if (++row == 0)
726 goto out;
727 } else
728 row = 0;
729
730 if (end >= browser->top_idx + browser->rows)
731 end_row = browser->rows - 1;
732 else
733 end_row = end - browser->top_idx;
734
735 ui_browser__gotorc(browser, y: row, x: column);
736 SLsmg_draw_vline(end_row - row + 1);
737
738 ui_browser__gotorc(browser, y: end_row, x: column);
739 if (end < browser->top_idx + browser->rows) {
740 SLsmg_write_char(SLSMG_LLCORN_CHAR);
741 ui_browser__gotorc(browser, y: end_row, x: column + 1);
742 SLsmg_write_char(SLSMG_HLINE_CHAR);
743 ui_browser__gotorc(browser, y: end_row, x: column + 2);
744 SLsmg_write_char(SLSMG_RARROW_CHAR);
745 }
746out:
747 SLsmg_set_char_set(0);
748}
749
750void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
751 u64 start, u64 end)
752{
753 if (start > end)
754 __ui_browser__line_arrow_up(browser, column, start, end);
755 else
756 __ui_browser__line_arrow_down(browser, column, start, end);
757}
758
759void ui_browser__mark_fused(struct ui_browser *browser, unsigned int column,
760 unsigned int row, int diff, bool arrow_down)
761{
762 int end_row;
763
764 if (diff <= 0)
765 return;
766
767 SLsmg_set_char_set(1);
768
769 if (arrow_down) {
770 if (row + diff <= browser->top_idx)
771 return;
772
773 end_row = row + diff - browser->top_idx;
774 ui_browser__gotorc(browser, y: end_row, x: column - 1);
775 SLsmg_write_char(SLSMG_LTEE_CHAR);
776
777 while (--end_row >= 0 && end_row > (int)(row - browser->top_idx)) {
778 ui_browser__gotorc(browser, y: end_row, x: column - 1);
779 SLsmg_draw_vline(1);
780 }
781
782 end_row = (int)(row - browser->top_idx);
783 if (end_row >= 0) {
784 ui_browser__gotorc(browser, y: end_row, x: column - 1);
785 SLsmg_write_char(SLSMG_ULCORN_CHAR);
786 ui_browser__gotorc(browser, y: end_row, x: column);
787 SLsmg_draw_hline(2);
788 }
789 } else {
790 if (row < browser->top_idx)
791 return;
792
793 end_row = row - browser->top_idx;
794 ui_browser__gotorc(browser, y: end_row, x: column - 1);
795 SLsmg_write_char(SLSMG_LTEE_CHAR);
796 ui_browser__gotorc(browser, y: end_row, x: column);
797 SLsmg_draw_hline(2);
798 }
799
800 SLsmg_set_char_set(0);
801}
802
803void ui_browser__init(void)
804{
805 int i = 0;
806
807 perf_config(fn: ui_browser__color_config, NULL);
808
809 while (ui_browser__colorsets[i].name) {
810 struct ui_browser_colorset *c = &ui_browser__colorsets[i++];
811 SLtt_set_color(c->colorset, c->name, c->fg, c->bg);
812 }
813}
814

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source code of linux/tools/perf/ui/browser.c