source: mainline/uspace/app/edit/edit.c@ 28a5ebd

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 28a5ebd was 28a5ebd, checked in by Martin Decky <martin@…>, 5 years ago

Use char32_t instead of wchat_t to represent UTF-32 strings

The intention of the native HelenOS string API has been always to
support Unicode in the UTF-8 and UTF-32 encodings as the sole character
representations and ignore the obsolete mess of older single-byte and
multibyte character encodings. Before C11, the wchar_t type has been
slightly misused for the purpose of the UTF-32 strings. The newer
char32_t type is obviously a much more suitable option. The standard
defines char32_t as uint_least32_t, thus we can take the liberty to fix
it to uint32_t.

To maintain compatilibity with the C Standard, the putwchar(wchar_t)
functions has been replaced by our custom putuchar(char32_t) functions
where appropriate.
  • Property mode set to 100644
File size: 35.7 KB
Line 
1/*
2 * Copyright (c) 2009 Jiri Svoboda
3 * Copyright (c) 2012 Martin Sucha
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * - The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30/** @addtogroup edit
31 * @brief Text editor.
32 * @{
33 */
34/**
35 * @file
36 */
37
38#include <stdio.h>
39#include <stdlib.h>
40#include <stddef.h>
41#include <stdbool.h>
42#include <vfs/vfs.h>
43#include <io/console.h>
44#include <io/style.h>
45#include <io/keycode.h>
46#include <errno.h>
47#include <align.h>
48#include <macros.h>
49#include <clipboard.h>
50#include <types/common.h>
51
52#include "sheet.h"
53#include "search.h"
54
55enum redraw_flags {
56 REDRAW_TEXT = (1 << 0),
57 REDRAW_ROW = (1 << 1),
58 REDRAW_STATUS = (1 << 2),
59 REDRAW_CARET = (1 << 3)
60};
61
62/** Pane
63 *
64 * A rectangular area of the screen used to edit a document. Different
65 * panes can be possibly used to edit the same document.
66 */
67typedef struct {
68 /* Pane dimensions */
69 int rows, columns;
70
71 /* Position of the visible area */
72 int sh_row, sh_column;
73
74 /** Bitmask of components that need redrawing */
75 enum redraw_flags rflags;
76
77 /** Current position of the caret */
78 tag_t caret_pos;
79
80 /** Start of selection */
81 tag_t sel_start;
82
83 /** Active keyboard modifiers */
84 keymod_t keymod;
85
86 /**
87 * Ideal column where the caret should try to get. This is used
88 * for maintaining the same column during vertical movement.
89 */
90 int ideal_column;
91
92 char *previous_search;
93 bool previous_search_reverse;
94} pane_t;
95
96/** Document
97 *
98 * Associates a sheet with a file where it can be saved to.
99 */
100typedef struct {
101 char *file_name;
102 sheet_t *sh;
103} doc_t;
104
105static console_ctrl_t *con;
106static doc_t doc;
107static bool done;
108static pane_t pane;
109static bool cursor_visible;
110
111static sysarg_t scr_rows;
112static sysarg_t scr_columns;
113
114#define ROW_BUF_SIZE 4096
115#define BUF_SIZE 64
116#define TAB_WIDTH 8
117
118/** Maximum filename length that can be entered. */
119#define INFNAME_MAX_LEN 128
120
121static void cursor_show(void);
122static void cursor_hide(void);
123static void cursor_setvis(bool visible);
124
125static void key_handle_press(kbd_event_t *ev);
126static void key_handle_unmod(kbd_event_t const *ev);
127static void key_handle_ctrl(kbd_event_t const *ev);
128static void key_handle_shift(kbd_event_t const *ev);
129static void key_handle_shift_ctrl(kbd_event_t const *ev);
130static void key_handle_movement(unsigned int key, bool shift);
131
132static void pos_handle(pos_event_t *ev);
133
134static errno_t file_save(char const *fname);
135static void file_save_as(void);
136static errno_t file_insert(char *fname);
137static errno_t file_save_range(char const *fname, spt_t const *spos,
138 spt_t const *epos);
139static char *range_get_str(spt_t const *spos, spt_t const *epos);
140
141static char *prompt(char const *prompt, char const *init_value);
142
143static void pane_text_display(void);
144static void pane_row_display(void);
145static void pane_row_range_display(int r0, int r1);
146static void pane_status_display(void);
147static void pane_caret_display(void);
148
149static void insert_char(char32_t c);
150static void delete_char_before(void);
151static void delete_char_after(void);
152static void caret_update(void);
153static void caret_move_relative(int drow, int dcolumn, enum dir_spec align_dir, bool select);
154static void caret_move_absolute(int row, int column, enum dir_spec align_dir, bool select);
155static void caret_move(spt_t spt, bool select, bool update_ideal_column);
156static void caret_move_word_left(bool select);
157static void caret_move_word_right(bool select);
158static void caret_go_to_line_ask(void);
159
160static bool selection_active(void);
161static void selection_sel_all(void);
162static void selection_sel_range(spt_t pa, spt_t pb);
163static void selection_get_points(spt_t *pa, spt_t *pb);
164static void selection_delete(void);
165static void selection_copy(void);
166static void insert_clipboard_data(void);
167
168static void search(char *pattern, bool reverse);
169static void search_prompt(bool reverse);
170static void search_repeat(void);
171
172static void pt_get_sof(spt_t *pt);
173static void pt_get_eof(spt_t *pt);
174static void pt_get_sol(spt_t *cpt, spt_t *spt);
175static void pt_get_eol(spt_t *cpt, spt_t *ept);
176static bool pt_is_word_beginning(spt_t *pt);
177static bool pt_is_delimiter(spt_t *pt);
178static bool pt_is_punctuation(spt_t *pt);
179static spt_t pt_find_word_left(spt_t spt);
180static spt_t pt_find_word_left(spt_t spt);
181
182static int tag_cmp(tag_t const *a, tag_t const *b);
183static int spt_cmp(spt_t const *a, spt_t const *b);
184static int coord_cmp(coord_t const *a, coord_t const *b);
185
186static void status_display(char const *str);
187
188int main(int argc, char *argv[])
189{
190 cons_event_t ev;
191 bool new_file;
192 errno_t rc;
193
194 con = console_init(stdin, stdout);
195 console_clear(con);
196
197 console_get_size(con, &scr_columns, &scr_rows);
198
199 pane.rows = scr_rows - 1;
200 pane.columns = scr_columns;
201 pane.sh_row = 1;
202 pane.sh_column = 1;
203
204 /* Start with an empty sheet. */
205 rc = sheet_create(&doc.sh);
206 if (rc != EOK) {
207 printf("Out of memory.\n");
208 return -1;
209 }
210
211 /* Place caret at the beginning of file. */
212 spt_t sof;
213 pt_get_sof(&sof);
214 sheet_place_tag(doc.sh, &sof, &pane.caret_pos);
215 pane.ideal_column = 1;
216
217 if (argc == 2) {
218 doc.file_name = str_dup(argv[1]);
219 } else if (argc > 1) {
220 printf("Invalid arguments.\n");
221 return -2;
222 } else {
223 doc.file_name = NULL;
224 }
225
226 new_file = false;
227
228 if (doc.file_name == NULL || file_insert(doc.file_name) != EOK)
229 new_file = true;
230
231 /* Place selection start tag. */
232 sheet_place_tag(doc.sh, &sof, &pane.sel_start);
233
234 /* Move to beginning of file. */
235 pt_get_sof(&sof);
236 caret_move(sof, true, true);
237
238 /* Initial display */
239 cursor_visible = true;
240
241 cursor_hide();
242 console_clear(con);
243 pane_text_display();
244 pane_status_display();
245 if (new_file && doc.file_name != NULL)
246 status_display("File not found. Starting empty file.");
247 pane_caret_display();
248 cursor_show();
249
250 done = false;
251
252 while (!done) {
253 console_get_event(con, &ev);
254 pane.rflags = 0;
255
256 switch (ev.type) {
257 case CEV_KEY:
258 pane.keymod = ev.ev.key.mods;
259 if (ev.ev.key.type == KEY_PRESS)
260 key_handle_press(&ev.ev.key);
261 break;
262 case CEV_POS:
263 pos_handle(&ev.ev.pos);
264 break;
265 }
266
267 /* Redraw as necessary. */
268
269 cursor_hide();
270
271 if (pane.rflags & REDRAW_TEXT)
272 pane_text_display();
273 if (pane.rflags & REDRAW_ROW)
274 pane_row_display();
275 if (pane.rflags & REDRAW_STATUS)
276 pane_status_display();
277 if (pane.rflags & REDRAW_CARET)
278 pane_caret_display();
279
280 cursor_show();
281 }
282
283 console_clear(con);
284
285 return 0;
286}
287
288/* Handle key press. */
289static void key_handle_press(kbd_event_t *ev)
290{
291 if (((ev->mods & KM_ALT) == 0) &&
292 ((ev->mods & KM_SHIFT) == 0) &&
293 (ev->mods & KM_CTRL) != 0) {
294 key_handle_ctrl(ev);
295 } else if (((ev->mods & KM_ALT) == 0) &&
296 ((ev->mods & KM_CTRL) == 0) &&
297 (ev->mods & KM_SHIFT) != 0) {
298 key_handle_shift(ev);
299 } else if (((ev->mods & KM_ALT) == 0) &&
300 ((ev->mods & KM_CTRL) != 0) &&
301 (ev->mods & KM_SHIFT) != 0) {
302 key_handle_shift_ctrl(ev);
303 } else if ((ev->mods & (KM_CTRL | KM_ALT | KM_SHIFT)) == 0) {
304 key_handle_unmod(ev);
305 }
306}
307
308static void cursor_show(void)
309{
310 cursor_setvis(true);
311}
312
313static void cursor_hide(void)
314{
315 cursor_setvis(false);
316}
317
318static void cursor_setvis(bool visible)
319{
320 if (cursor_visible != visible) {
321 console_cursor_visibility(con, visible);
322 cursor_visible = visible;
323 }
324}
325
326/** Handle key without modifier. */
327static void key_handle_unmod(kbd_event_t const *ev)
328{
329 switch (ev->key) {
330 case KC_ENTER:
331 selection_delete();
332 insert_char('\n');
333 caret_update();
334 break;
335 case KC_LEFT:
336 case KC_RIGHT:
337 case KC_UP:
338 case KC_DOWN:
339 case KC_HOME:
340 case KC_END:
341 case KC_PAGE_UP:
342 case KC_PAGE_DOWN:
343 key_handle_movement(ev->key, false);
344 break;
345 case KC_BACKSPACE:
346 if (selection_active())
347 selection_delete();
348 else
349 delete_char_before();
350 caret_update();
351 break;
352 case KC_DELETE:
353 if (selection_active())
354 selection_delete();
355 else
356 delete_char_after();
357 caret_update();
358 break;
359 default:
360 if (ev->c >= 32 || ev->c == '\t') {
361 selection_delete();
362 insert_char(ev->c);
363 caret_update();
364 }
365 break;
366 }
367}
368
369/** Handle Shift-key combination. */
370static void key_handle_shift(kbd_event_t const *ev)
371{
372 switch (ev->key) {
373 case KC_LEFT:
374 case KC_RIGHT:
375 case KC_UP:
376 case KC_DOWN:
377 case KC_HOME:
378 case KC_END:
379 case KC_PAGE_UP:
380 case KC_PAGE_DOWN:
381 key_handle_movement(ev->key, true);
382 break;
383 default:
384 if (ev->c >= 32 || ev->c == '\t') {
385 selection_delete();
386 insert_char(ev->c);
387 caret_update();
388 }
389 break;
390 }
391}
392
393/** Handle Ctrl-key combination. */
394static void key_handle_ctrl(kbd_event_t const *ev)
395{
396 spt_t pt;
397 switch (ev->key) {
398 case KC_Q:
399 done = true;
400 break;
401 case KC_S:
402 if (doc.file_name != NULL)
403 file_save(doc.file_name);
404 else
405 file_save_as();
406 break;
407 case KC_E:
408 file_save_as();
409 break;
410 case KC_C:
411 selection_copy();
412 break;
413 case KC_V:
414 selection_delete();
415 insert_clipboard_data();
416 pane.rflags |= REDRAW_TEXT;
417 caret_update();
418 break;
419 case KC_X:
420 selection_copy();
421 selection_delete();
422 pane.rflags |= REDRAW_TEXT;
423 caret_update();
424 break;
425 case KC_A:
426 selection_sel_all();
427 break;
428 case KC_RIGHT:
429 caret_move_word_right(false);
430 break;
431 case KC_LEFT:
432 caret_move_word_left(false);
433 break;
434 case KC_L:
435 caret_go_to_line_ask();
436 break;
437 case KC_F:
438 search_prompt(false);
439 break;
440 case KC_N:
441 search_repeat();
442 break;
443 case KC_HOME:
444 pt_get_sof(&pt);
445 caret_move(pt, false, true);
446 break;
447 case KC_END:
448 pt_get_eof(&pt);
449 caret_move(pt, false, true);
450 break;
451 default:
452 break;
453 }
454}
455
456static void key_handle_shift_ctrl(kbd_event_t const *ev)
457{
458 spt_t pt;
459 switch (ev->key) {
460 case KC_LEFT:
461 caret_move_word_left(true);
462 break;
463 case KC_RIGHT:
464 caret_move_word_right(true);
465 break;
466 case KC_F:
467 search_prompt(true);
468 break;
469 case KC_HOME:
470 pt_get_sof(&pt);
471 caret_move(pt, true, true);
472 break;
473 case KC_END:
474 pt_get_eof(&pt);
475 caret_move(pt, true, true);
476 break;
477 default:
478 break;
479 }
480}
481
482static void pos_handle(pos_event_t *ev)
483{
484 coord_t bc;
485 spt_t pt;
486 bool select;
487
488 if (ev->type == POS_PRESS && ev->vpos < (unsigned)pane.rows) {
489 bc.row = pane.sh_row + ev->vpos;
490 bc.column = pane.sh_column + ev->hpos;
491 sheet_get_cell_pt(doc.sh, &bc, dir_before, &pt);
492
493 select = (pane.keymod & KM_SHIFT) != 0;
494
495 caret_move(pt, select, true);
496 }
497}
498
499/** Move caret while preserving or resetting selection. */
500static void caret_move(spt_t new_caret_pt, bool select, bool update_ideal_column)
501{
502 spt_t old_caret_pt, old_sel_pt;
503 coord_t c_old, c_new;
504 bool had_sel;
505
506 /* Check if we had selection before. */
507 tag_get_pt(&pane.caret_pos, &old_caret_pt);
508 tag_get_pt(&pane.sel_start, &old_sel_pt);
509 had_sel = !spt_equal(&old_caret_pt, &old_sel_pt);
510
511 /* Place tag of the caret */
512 sheet_remove_tag(doc.sh, &pane.caret_pos);
513 sheet_place_tag(doc.sh, &new_caret_pt, &pane.caret_pos);
514
515 if (select == false) {
516 /* Move sel_start to the same point as caret. */
517 sheet_remove_tag(doc.sh, &pane.sel_start);
518 sheet_place_tag(doc.sh, &new_caret_pt, &pane.sel_start);
519 }
520
521 spt_get_coord(&new_caret_pt, &c_new);
522 if (select) {
523 spt_get_coord(&old_caret_pt, &c_old);
524
525 if (c_old.row == c_new.row)
526 pane.rflags |= REDRAW_ROW;
527 else
528 pane.rflags |= REDRAW_TEXT;
529
530 } else if (had_sel == true) {
531 /* Redraw because text was unselected. */
532 pane.rflags |= REDRAW_TEXT;
533 }
534
535 if (update_ideal_column)
536 pane.ideal_column = c_new.column;
537
538 caret_update();
539}
540
541static void key_handle_movement(unsigned int key, bool select)
542{
543 spt_t pt;
544 switch (key) {
545 case KC_LEFT:
546 caret_move_relative(0, -1, dir_before, select);
547 break;
548 case KC_RIGHT:
549 caret_move_relative(0, 0, dir_after, select);
550 break;
551 case KC_UP:
552 caret_move_relative(-1, 0, dir_before, select);
553 break;
554 case KC_DOWN:
555 caret_move_relative(+1, 0, dir_before, select);
556 break;
557 case KC_HOME:
558 tag_get_pt(&pane.caret_pos, &pt);
559 pt_get_sol(&pt, &pt);
560 caret_move(pt, select, true);
561 break;
562 case KC_END:
563 tag_get_pt(&pane.caret_pos, &pt);
564 pt_get_eol(&pt, &pt);
565 caret_move(pt, select, true);
566 break;
567 case KC_PAGE_UP:
568 caret_move_relative(-pane.rows, 0, dir_before, select);
569 break;
570 case KC_PAGE_DOWN:
571 caret_move_relative(+pane.rows, 0, dir_before, select);
572 break;
573 default:
574 break;
575 }
576}
577
578/** Save the document. */
579static errno_t file_save(char const *fname)
580{
581 spt_t sp, ep;
582 errno_t rc;
583
584 status_display("Saving...");
585 pt_get_sof(&sp);
586 pt_get_eof(&ep);
587
588 rc = file_save_range(fname, &sp, &ep);
589
590 switch (rc) {
591 case EINVAL:
592 status_display("Error opening file!");
593 break;
594 case EIO:
595 status_display("Error writing data!");
596 break;
597 default:
598 status_display("File saved.");
599 break;
600 }
601
602 return rc;
603}
604
605/** Change document name and save. */
606static void file_save_as(void)
607{
608 const char *old_fname = (doc.file_name != NULL) ? doc.file_name : "";
609 char *fname;
610
611 fname = prompt("Save As", old_fname);
612 if (fname == NULL) {
613 status_display("Save cancelled.");
614 return;
615 }
616
617 errno_t rc = file_save(fname);
618 if (rc != EOK)
619 return;
620
621 if (doc.file_name != NULL)
622 free(doc.file_name);
623 doc.file_name = fname;
624}
625
626/** Ask for a string. */
627static char *prompt(char const *prompt, char const *init_value)
628{
629 cons_event_t ev;
630 kbd_event_t *kev;
631 char *str;
632 char32_t buffer[INFNAME_MAX_LEN + 1];
633 int max_len;
634 int nc;
635 bool done;
636
637 asprintf(&str, "%s: %s", prompt, init_value);
638 status_display(str);
639 console_set_pos(con, 1 + str_length(str), scr_rows - 1);
640 free(str);
641
642 console_set_style(con, STYLE_INVERTED);
643
644 max_len = min(INFNAME_MAX_LEN, scr_columns - 4 - str_length(prompt));
645 str_to_wstr(buffer, max_len + 1, init_value);
646 nc = wstr_length(buffer);
647 done = false;
648
649 while (!done) {
650 console_get_event(con, &ev);
651
652 if (ev.type == CEV_KEY && ev.ev.key.type == KEY_PRESS) {
653 kev = &ev.ev.key;
654
655 /* Handle key press. */
656 if ((kev->mods & (KM_CTRL | KM_ALT)) == 0) {
657 switch (kev->key) {
658 case KC_ESCAPE:
659 return NULL;
660 case KC_BACKSPACE:
661 if (nc > 0) {
662 putchar('\b');
663 console_flush(con);
664 --nc;
665 }
666 break;
667 case KC_ENTER:
668 done = true;
669 break;
670 default:
671 if (kev->c >= 32 && nc < max_len) {
672 putuchar(kev->c);
673 console_flush(con);
674 buffer[nc++] = kev->c;
675 }
676 break;
677 }
678 }
679 }
680 }
681
682 buffer[nc] = '\0';
683 str = wstr_to_astr(buffer);
684
685 console_set_style(con, STYLE_NORMAL);
686
687 return str;
688}
689
690/** Insert file at caret position.
691 *
692 * Reads in the contents of a file and inserts them at the current position
693 * of the caret.
694 */
695static errno_t file_insert(char *fname)
696{
697 FILE *f;
698 char32_t c;
699 char buf[BUF_SIZE];
700 int bcnt;
701 int n_read;
702 size_t off;
703
704 f = fopen(fname, "rt");
705 if (f == NULL)
706 return EINVAL;
707
708 bcnt = 0;
709
710 while (true) {
711 if (bcnt < STR_BOUNDS(1)) {
712 n_read = fread(buf + bcnt, 1, BUF_SIZE - bcnt, f);
713 bcnt += n_read;
714 }
715
716 off = 0;
717 c = str_decode(buf, &off, bcnt);
718 if (c == '\0')
719 break;
720
721 bcnt -= off;
722 memcpy(buf, buf + off, bcnt);
723
724 insert_char(c);
725 }
726
727 fclose(f);
728
729 return EOK;
730}
731
732/** Save a range of text into a file. */
733static errno_t file_save_range(char const *fname, spt_t const *spos,
734 spt_t const *epos)
735{
736 FILE *f;
737 char buf[BUF_SIZE];
738 spt_t sp, bep;
739 size_t bytes, n_written;
740
741 f = fopen(fname, "wt");
742 if (f == NULL)
743 return EINVAL;
744
745 sp = *spos;
746
747 do {
748 sheet_copy_out(doc.sh, &sp, epos, buf, BUF_SIZE, &bep);
749 bytes = str_size(buf);
750
751 n_written = fwrite(buf, 1, bytes, f);
752 if (n_written != bytes) {
753 return EIO;
754 }
755
756 sp = bep;
757 } while (!spt_equal(&bep, epos));
758
759 if (fclose(f) < 0)
760 return EIO;
761
762 return EOK;
763}
764
765/** Return contents of range as a new string. */
766static char *range_get_str(spt_t const *spos, spt_t const *epos)
767{
768 char *buf;
769 spt_t sp, bep;
770 size_t bytes;
771 size_t buf_size, bpos;
772
773 buf_size = 1;
774
775 buf = malloc(buf_size);
776 if (buf == NULL)
777 return NULL;
778
779 bpos = 0;
780 sp = *spos;
781
782 while (true) {
783 sheet_copy_out(doc.sh, &sp, epos, &buf[bpos], buf_size - bpos,
784 &bep);
785 bytes = str_size(&buf[bpos]);
786 bpos += bytes;
787 sp = bep;
788
789 if (spt_equal(&bep, epos))
790 break;
791
792 buf_size *= 2;
793 char *tmp = realloc(buf, buf_size);
794 if (tmp == NULL) {
795 free(buf);
796 return NULL;
797 }
798 buf = tmp;
799 }
800
801 return buf;
802}
803
804static void pane_text_display(void)
805{
806 int sh_rows, rows;
807
808 sheet_get_num_rows(doc.sh, &sh_rows);
809 rows = min(sh_rows - pane.sh_row + 1, pane.rows);
810
811 /* Draw rows from the sheet. */
812
813 console_set_pos(con, 0, 0);
814 pane_row_range_display(0, rows);
815
816 /* Clear the remaining rows if file is short. */
817
818 int i;
819 sysarg_t j;
820 for (i = rows; i < pane.rows; ++i) {
821 console_set_pos(con, 0, i);
822 for (j = 0; j < scr_columns; ++j)
823 putchar(' ');
824 console_flush(con);
825 }
826
827 pane.rflags |= (REDRAW_STATUS | REDRAW_CARET);
828 pane.rflags &= ~REDRAW_ROW;
829}
830
831/** Display just the row where the caret is. */
832static void pane_row_display(void)
833{
834 spt_t caret_pt;
835 coord_t coord;
836 int ridx;
837
838 tag_get_pt(&pane.caret_pos, &caret_pt);
839 spt_get_coord(&caret_pt, &coord);
840
841 ridx = coord.row - pane.sh_row;
842 pane_row_range_display(ridx, ridx + 1);
843 pane.rflags |= (REDRAW_STATUS | REDRAW_CARET);
844}
845
846static void pane_row_range_display(int r0, int r1)
847{
848 int i, j, fill;
849 spt_t rb, re, dep, pt;
850 coord_t rbc, rec;
851 char row_buf[ROW_BUF_SIZE];
852 char32_t c;
853 size_t pos, size;
854 int s_column;
855 coord_t csel_start, csel_end, ctmp;
856
857 /* Determine selection start and end. */
858
859 tag_get_pt(&pane.sel_start, &pt);
860 spt_get_coord(&pt, &csel_start);
861
862 tag_get_pt(&pane.caret_pos, &pt);
863 spt_get_coord(&pt, &csel_end);
864
865 if (coord_cmp(&csel_start, &csel_end) > 0) {
866 ctmp = csel_start;
867 csel_start = csel_end;
868 csel_end = ctmp;
869 }
870
871 /* Draw rows from the sheet. */
872
873 console_set_pos(con, 0, 0);
874 for (i = r0; i < r1; ++i) {
875 /* Starting point for row display */
876 rbc.row = pane.sh_row + i;
877 rbc.column = pane.sh_column;
878 sheet_get_cell_pt(doc.sh, &rbc, dir_before, &rb);
879
880 /* Ending point for row display */
881 rec.row = pane.sh_row + i;
882 rec.column = pane.sh_column + pane.columns;
883 sheet_get_cell_pt(doc.sh, &rec, dir_before, &re);
884
885 /* Copy the text of the row to the buffer. */
886 sheet_copy_out(doc.sh, &rb, &re, row_buf, ROW_BUF_SIZE, &dep);
887
888 /* Display text from the buffer. */
889
890 if (coord_cmp(&csel_start, &rbc) <= 0 &&
891 coord_cmp(&rbc, &csel_end) < 0) {
892 console_flush(con);
893 console_set_style(con, STYLE_SELECTED);
894 console_flush(con);
895 }
896
897 console_set_pos(con, 0, i);
898 size = str_size(row_buf);
899 pos = 0;
900 s_column = pane.sh_column;
901 while (pos < size) {
902 if ((csel_start.row == rbc.row) && (csel_start.column == s_column)) {
903 console_flush(con);
904 console_set_style(con, STYLE_SELECTED);
905 console_flush(con);
906 }
907
908 if ((csel_end.row == rbc.row) && (csel_end.column == s_column)) {
909 console_flush(con);
910 console_set_style(con, STYLE_NORMAL);
911 console_flush(con);
912 }
913
914 c = str_decode(row_buf, &pos, size);
915 if (c != '\t') {
916 printf("%lc", (wint_t) c);
917 s_column += 1;
918 } else {
919 fill = 1 + ALIGN_UP(s_column, TAB_WIDTH) -
920 s_column;
921
922 for (j = 0; j < fill; ++j)
923 putchar(' ');
924 s_column += fill;
925 }
926 }
927
928 if ((csel_end.row == rbc.row) && (csel_end.column == s_column)) {
929 console_flush(con);
930 console_set_style(con, STYLE_NORMAL);
931 console_flush(con);
932 }
933
934 /* Fill until the end of display area. */
935
936 if ((unsigned)s_column - 1 < scr_columns)
937 fill = scr_columns - (s_column - 1);
938 else
939 fill = 0;
940
941 for (j = 0; j < fill; ++j)
942 putchar(' ');
943 console_flush(con);
944 console_set_style(con, STYLE_NORMAL);
945 }
946
947 pane.rflags |= REDRAW_CARET;
948}
949
950/** Display pane status in the status line. */
951static void pane_status_display(void)
952{
953 spt_t caret_pt;
954 coord_t coord;
955 int last_row;
956 char *fname;
957 char *p;
958 char *text;
959 size_t n;
960 int pos;
961 size_t nextra;
962 size_t fnw;
963
964 tag_get_pt(&pane.caret_pos, &caret_pt);
965 spt_get_coord(&caret_pt, &coord);
966
967 sheet_get_num_rows(doc.sh, &last_row);
968
969 if (doc.file_name != NULL) {
970 /* Remove directory component */
971 p = str_rchr(doc.file_name, '/');
972 if (p != NULL)
973 fname = str_dup(p + 1);
974 else
975 fname = str_dup(doc.file_name);
976 } else {
977 fname = str_dup("<unnamed>");
978 }
979
980 if (fname == NULL)
981 return;
982
983 console_set_pos(con, 0, scr_rows - 1);
984 console_set_style(con, STYLE_INVERTED);
985
986 /*
987 * Make sure the status fits on the screen. This loop should
988 * be executed at most twice.
989 */
990 while (true) {
991 int rc = asprintf(&text, " %d, %d (%d): File '%s'. Ctrl-Q Quit Ctrl-S Save "
992 "Ctrl-E Save As", coord.row, coord.column, last_row, fname);
993 if (rc < 0) {
994 n = 0;
995 goto finish;
996 }
997
998 /* If it already fits, we're done */
999 n = str_width(text);
1000 if (n <= scr_columns - 2)
1001 break;
1002
1003 /* Compute number of excess characters */
1004 nextra = n - (scr_columns - 2);
1005 /** With of the file name part */
1006 fnw = str_width(fname);
1007
1008 /*
1009 * If reducing file name to two characters '..' won't help,
1010 * just give up and print a blank status.
1011 */
1012 if (nextra > fnw - 2)
1013 goto finish;
1014
1015 /* Compute position where we overwrite with '..\0' */
1016 if (fnw >= nextra + 2) {
1017 p = fname + str_lsize(fname, fnw - nextra - 2);
1018 } else {
1019 p = fname;
1020 }
1021
1022 /* Shorten the string */
1023 p[0] = p[1] = '.';
1024 p[2] = '\0';
1025
1026 /* Need to format the string once more. */
1027 free(text);
1028 }
1029
1030 printf("%s", text);
1031 free(text);
1032 free(fname);
1033finish:
1034 /* Fill the rest of the line */
1035 pos = scr_columns - 1 - n;
1036 printf("%*s", pos, "");
1037 console_flush(con);
1038 console_set_style(con, STYLE_NORMAL);
1039
1040 pane.rflags |= REDRAW_CARET;
1041}
1042
1043/** Set cursor to reflect position of the caret. */
1044static void pane_caret_display(void)
1045{
1046 spt_t caret_pt;
1047 coord_t coord;
1048
1049 tag_get_pt(&pane.caret_pos, &caret_pt);
1050
1051 spt_get_coord(&caret_pt, &coord);
1052 console_set_pos(con, coord.column - pane.sh_column,
1053 coord.row - pane.sh_row);
1054}
1055
1056/** Insert a character at caret position. */
1057static void insert_char(char32_t c)
1058{
1059 spt_t pt;
1060 char cbuf[STR_BOUNDS(1) + 1];
1061 size_t offs;
1062
1063 tag_get_pt(&pane.caret_pos, &pt);
1064
1065 offs = 0;
1066 chr_encode(c, cbuf, &offs, STR_BOUNDS(1) + 1);
1067 cbuf[offs] = '\0';
1068
1069 (void) sheet_insert(doc.sh, &pt, dir_before, cbuf);
1070
1071 pane.rflags |= REDRAW_ROW;
1072 if (c == '\n')
1073 pane.rflags |= REDRAW_TEXT;
1074}
1075
1076/** Delete the character before the caret. */
1077static void delete_char_before(void)
1078{
1079 spt_t sp, ep;
1080 coord_t coord;
1081
1082 tag_get_pt(&pane.caret_pos, &ep);
1083 spt_get_coord(&ep, &coord);
1084
1085 coord.column -= 1;
1086 sheet_get_cell_pt(doc.sh, &coord, dir_before, &sp);
1087
1088 (void) sheet_delete(doc.sh, &sp, &ep);
1089
1090 pane.rflags |= REDRAW_ROW;
1091 if (coord.column < 1)
1092 pane.rflags |= REDRAW_TEXT;
1093}
1094
1095/** Delete the character after the caret. */
1096static void delete_char_after(void)
1097{
1098 spt_t sp, ep;
1099 coord_t sc, ec;
1100
1101 tag_get_pt(&pane.caret_pos, &sp);
1102 spt_get_coord(&sp, &sc);
1103
1104 sheet_get_cell_pt(doc.sh, &sc, dir_after, &ep);
1105 spt_get_coord(&ep, &ec);
1106
1107 (void) sheet_delete(doc.sh, &sp, &ep);
1108
1109 pane.rflags |= REDRAW_ROW;
1110 if (ec.row != sc.row)
1111 pane.rflags |= REDRAW_TEXT;
1112}
1113
1114/** Scroll pane after caret has moved.
1115 *
1116 * After modifying the position of the caret, this is called to scroll
1117 * the pane to ensure that the caret is in the visible area.
1118 */
1119static void caret_update(void)
1120{
1121 spt_t pt;
1122 coord_t coord;
1123
1124 tag_get_pt(&pane.caret_pos, &pt);
1125 spt_get_coord(&pt, &coord);
1126
1127 /* Scroll pane vertically. */
1128
1129 if (coord.row < pane.sh_row) {
1130 pane.sh_row = coord.row;
1131 pane.rflags |= REDRAW_TEXT;
1132 }
1133
1134 if (coord.row > pane.sh_row + pane.rows - 1) {
1135 pane.sh_row = coord.row - pane.rows + 1;
1136 pane.rflags |= REDRAW_TEXT;
1137 }
1138
1139 /* Scroll pane horizontally. */
1140
1141 if (coord.column < pane.sh_column) {
1142 pane.sh_column = coord.column;
1143 pane.rflags |= REDRAW_TEXT;
1144 }
1145
1146 if (coord.column > pane.sh_column + pane.columns - 1) {
1147 pane.sh_column = coord.column - pane.columns + 1;
1148 pane.rflags |= REDRAW_TEXT;
1149 }
1150
1151 pane.rflags |= (REDRAW_CARET | REDRAW_STATUS);
1152}
1153
1154/** Relatively move caret position.
1155 *
1156 * Moves caret relatively to the current position. Looking at the first
1157 * character cell after the caret and moving by @a drow and @a dcolumn, we get
1158 * to a new character cell, and thus a new character. Then we either go to the
1159 * point before the the character or after it, depending on @a align_dir.
1160 *
1161 * @param select true if the selection tag should stay where it is
1162 */
1163static void caret_move_relative(int drow, int dcolumn, enum dir_spec align_dir,
1164 bool select)
1165{
1166 spt_t pt;
1167 coord_t coord;
1168 int num_rows;
1169 bool pure_vertical;
1170
1171 tag_get_pt(&pane.caret_pos, &pt);
1172 spt_get_coord(&pt, &coord);
1173 coord.row += drow;
1174 coord.column += dcolumn;
1175
1176 /* Clamp coordinates. */
1177 if (drow < 0 && coord.row < 1)
1178 coord.row = 1;
1179 if (dcolumn < 0 && coord.column < 1) {
1180 if (coord.row < 2)
1181 coord.column = 1;
1182 else {
1183 coord.row--;
1184 sheet_get_row_width(doc.sh, coord.row, &coord.column);
1185 }
1186 }
1187 if (drow > 0) {
1188 sheet_get_num_rows(doc.sh, &num_rows);
1189 if (coord.row > num_rows)
1190 coord.row = num_rows;
1191 }
1192
1193 /* For purely vertical movement try attaining @c ideal_column. */
1194 pure_vertical = (dcolumn == 0 && align_dir == dir_before);
1195 if (pure_vertical)
1196 coord.column = pane.ideal_column;
1197
1198 /*
1199 * Select the point before or after the character at the designated
1200 * coordinates. The character can be wider than one cell (e.g. tab).
1201 */
1202 sheet_get_cell_pt(doc.sh, &coord, align_dir, &pt);
1203
1204 /* For non-vertical movement set the new value for @c ideal_column. */
1205 caret_move(pt, select, !pure_vertical);
1206}
1207
1208/** Absolutely move caret position.
1209 *
1210 * Moves caret to a specified position. We get to a new character cell, and
1211 * thus a new character. Then we either go to the point before the the character
1212 * or after it, depending on @a align_dir.
1213 *
1214 * @param select true if the selection tag should stay where it is
1215 */
1216static void caret_move_absolute(int row, int column, enum dir_spec align_dir,
1217 bool select)
1218{
1219 coord_t coord;
1220 coord.row = row;
1221 coord.column = column;
1222
1223 spt_t pt;
1224 sheet_get_cell_pt(doc.sh, &coord, align_dir, &pt);
1225
1226 caret_move(pt, select, true);
1227}
1228
1229/** Find beginning of a word to the left of spt */
1230static spt_t pt_find_word_left(spt_t spt)
1231{
1232 do {
1233 spt_prev_char(spt, &spt);
1234 } while (!pt_is_word_beginning(&spt));
1235 return spt;
1236}
1237
1238/** Find beginning of a word to the right of spt */
1239static spt_t pt_find_word_right(spt_t spt)
1240{
1241 do {
1242 spt_next_char(spt, &spt);
1243 } while (!pt_is_word_beginning(&spt));
1244 return spt;
1245}
1246
1247static void caret_move_word_left(bool select)
1248{
1249 spt_t pt;
1250 tag_get_pt(&pane.caret_pos, &pt);
1251 spt_t word_left = pt_find_word_left(pt);
1252 caret_move(word_left, select, true);
1253}
1254
1255static void caret_move_word_right(bool select)
1256{
1257 spt_t pt;
1258 tag_get_pt(&pane.caret_pos, &pt);
1259 spt_t word_right = pt_find_word_right(pt);
1260 caret_move(word_right, select, true);
1261}
1262
1263/** Ask for line and go to it. */
1264static void caret_go_to_line_ask(void)
1265{
1266 char *sline;
1267
1268 sline = prompt("Go to line", "");
1269 if (sline == NULL) {
1270 status_display("Go to line cancelled.");
1271 return;
1272 }
1273
1274 char *endptr;
1275 int line = strtol(sline, &endptr, 10);
1276 if (*endptr != '\0') {
1277 free(sline);
1278 status_display("Invalid number entered.");
1279 return;
1280 }
1281 free(sline);
1282
1283 caret_move_absolute(line, pane.ideal_column, dir_before, false);
1284}
1285
1286/* Search operations */
1287static errno_t search_spt_producer(void *data, char32_t *ret)
1288{
1289 assert(data != NULL);
1290 assert(ret != NULL);
1291 spt_t *spt = data;
1292 *ret = spt_next_char(*spt, spt);
1293 return EOK;
1294}
1295
1296static errno_t search_spt_reverse_producer(void *data, char32_t *ret)
1297{
1298 assert(data != NULL);
1299 assert(ret != NULL);
1300 spt_t *spt = data;
1301 *ret = spt_prev_char(*spt, spt);
1302 return EOK;
1303}
1304
1305static errno_t search_spt_mark(void *data, void **mark)
1306{
1307 assert(data != NULL);
1308 assert(mark != NULL);
1309 spt_t *spt = data;
1310 spt_t *new = calloc(1, sizeof(spt_t));
1311 *mark = new;
1312 if (new == NULL)
1313 return ENOMEM;
1314 *new = *spt;
1315 return EOK;
1316}
1317
1318static void search_spt_mark_free(void *data)
1319{
1320 free(data);
1321}
1322
1323static search_ops_t search_spt_ops = {
1324 .equals = char_exact_equals,
1325 .producer = search_spt_producer,
1326 .mark = search_spt_mark,
1327 .mark_free = search_spt_mark_free,
1328};
1329
1330static search_ops_t search_spt_reverse_ops = {
1331 .equals = char_exact_equals,
1332 .producer = search_spt_reverse_producer,
1333 .mark = search_spt_mark,
1334 .mark_free = search_spt_mark_free,
1335};
1336
1337/** Ask for line and go to it. */
1338static void search_prompt(bool reverse)
1339{
1340 char *pattern;
1341
1342 const char *prompt_text = "Find next";
1343 if (reverse)
1344 prompt_text = "Find previous";
1345
1346 const char *default_value = "";
1347 if (pane.previous_search)
1348 default_value = pane.previous_search;
1349
1350 pattern = prompt(prompt_text, default_value);
1351 if (pattern == NULL) {
1352 status_display("Search cancelled.");
1353 return;
1354 }
1355
1356 if (pane.previous_search)
1357 free(pane.previous_search);
1358 pane.previous_search = pattern;
1359 pane.previous_search_reverse = reverse;
1360
1361 search(pattern, reverse);
1362}
1363
1364static void search_repeat(void)
1365{
1366 if (pane.previous_search == NULL) {
1367 status_display("No previous search to repeat.");
1368 return;
1369 }
1370
1371 search(pane.previous_search, pane.previous_search_reverse);
1372}
1373
1374static void search(char *pattern, bool reverse)
1375{
1376 status_display("Searching...");
1377
1378 spt_t sp, producer_pos;
1379 tag_get_pt(&pane.caret_pos, &sp);
1380
1381 /* Start searching on the position before/after caret */
1382 if (!reverse) {
1383 spt_next_char(sp, &sp);
1384 } else {
1385 spt_prev_char(sp, &sp);
1386 }
1387 producer_pos = sp;
1388
1389 search_ops_t ops = search_spt_ops;
1390 if (reverse)
1391 ops = search_spt_reverse_ops;
1392
1393 search_t *search = search_init(pattern, &producer_pos, ops, reverse);
1394 if (search == NULL) {
1395 status_display("Failed initializing search.");
1396 return;
1397 }
1398
1399 match_t match;
1400 errno_t rc = search_next_match(search, &match);
1401 if (rc != EOK) {
1402 status_display("Failed searching.");
1403 search_fini(search);
1404 }
1405
1406 if (match.end) {
1407 status_display("Match found.");
1408 assert(match.end != NULL);
1409 spt_t *end = match.end;
1410 caret_move(*end, false, true);
1411 while (match.length > 0) {
1412 match.length--;
1413 if (reverse) {
1414 spt_next_char(*end, end);
1415 } else {
1416 spt_prev_char(*end, end);
1417 }
1418 }
1419 caret_move(*end, true, true);
1420 free(end);
1421 } else {
1422 status_display("Not found.");
1423 }
1424
1425 search_fini(search);
1426}
1427
1428/** Check for non-empty selection. */
1429static bool selection_active(void)
1430{
1431 return (tag_cmp(&pane.caret_pos, &pane.sel_start) != 0);
1432}
1433
1434static void selection_get_points(spt_t *pa, spt_t *pb)
1435{
1436 spt_t pt;
1437
1438 tag_get_pt(&pane.sel_start, pa);
1439 tag_get_pt(&pane.caret_pos, pb);
1440
1441 if (spt_cmp(pa, pb) > 0) {
1442 pt = *pa;
1443 *pa = *pb;
1444 *pb = pt;
1445 }
1446}
1447
1448/** Delete selected text. */
1449static void selection_delete(void)
1450{
1451 spt_t pa, pb;
1452 coord_t ca, cb;
1453 int rel;
1454
1455 tag_get_pt(&pane.sel_start, &pa);
1456 tag_get_pt(&pane.caret_pos, &pb);
1457 spt_get_coord(&pa, &ca);
1458 spt_get_coord(&pb, &cb);
1459 rel = coord_cmp(&ca, &cb);
1460
1461 if (rel == 0)
1462 return;
1463
1464 if (rel < 0)
1465 sheet_delete(doc.sh, &pa, &pb);
1466 else
1467 sheet_delete(doc.sh, &pb, &pa);
1468
1469 if (ca.row == cb.row)
1470 pane.rflags |= REDRAW_ROW;
1471 else
1472 pane.rflags |= REDRAW_TEXT;
1473}
1474
1475/** Select all text in the editor */
1476static void selection_sel_all(void)
1477{
1478 spt_t spt, ept;
1479
1480 pt_get_sof(&spt);
1481 pt_get_eof(&ept);
1482
1483 selection_sel_range(spt, ept);
1484}
1485
1486/** Select select all text in a given range with the given direction */
1487static void selection_sel_range(spt_t pa, spt_t pb)
1488{
1489 sheet_remove_tag(doc.sh, &pane.sel_start);
1490 sheet_place_tag(doc.sh, &pa, &pane.sel_start);
1491 sheet_remove_tag(doc.sh, &pane.caret_pos);
1492 sheet_place_tag(doc.sh, &pb, &pane.caret_pos);
1493
1494 pane.rflags |= REDRAW_TEXT;
1495 caret_update();
1496}
1497
1498static void selection_copy(void)
1499{
1500 spt_t pa, pb;
1501 char *str;
1502
1503 selection_get_points(&pa, &pb);
1504 str = range_get_str(&pa, &pb);
1505 if (str == NULL || clipboard_put_str(str) != EOK) {
1506 status_display("Copying to clipboard failed!");
1507 }
1508 free(str);
1509}
1510
1511static void insert_clipboard_data(void)
1512{
1513 char *str;
1514 size_t off;
1515 char32_t c;
1516 errno_t rc;
1517
1518 rc = clipboard_get_str(&str);
1519 if (rc != EOK || str == NULL)
1520 return;
1521
1522 off = 0;
1523
1524 while (true) {
1525 c = str_decode(str, &off, STR_NO_LIMIT);
1526 if (c == '\0')
1527 break;
1528
1529 insert_char(c);
1530 }
1531
1532 free(str);
1533}
1534
1535/** Get start-of-file s-point. */
1536static void pt_get_sof(spt_t *pt)
1537{
1538 coord_t coord;
1539
1540 coord.row = coord.column = 1;
1541 sheet_get_cell_pt(doc.sh, &coord, dir_before, pt);
1542}
1543
1544/** Get end-of-file s-point. */
1545static void pt_get_eof(spt_t *pt)
1546{
1547 coord_t coord;
1548 int num_rows;
1549
1550 sheet_get_num_rows(doc.sh, &num_rows);
1551 coord.row = num_rows + 1;
1552 coord.column = 1;
1553
1554 sheet_get_cell_pt(doc.sh, &coord, dir_after, pt);
1555}
1556
1557/** Get start-of-line s-point for given s-point cpt */
1558static void pt_get_sol(spt_t *cpt, spt_t *spt)
1559{
1560 coord_t coord;
1561
1562 spt_get_coord(cpt, &coord);
1563 coord.column = 1;
1564
1565 sheet_get_cell_pt(doc.sh, &coord, dir_before, spt);
1566}
1567
1568/** Get end-of-line s-point for given s-point cpt */
1569static void pt_get_eol(spt_t *cpt, spt_t *ept)
1570{
1571 coord_t coord;
1572 int row_width;
1573
1574 spt_get_coord(cpt, &coord);
1575 sheet_get_row_width(doc.sh, coord.row, &row_width);
1576 coord.column = row_width - 1;
1577
1578 sheet_get_cell_pt(doc.sh, &coord, dir_after, ept);
1579}
1580
1581/** Check whether the spt is at a beginning of a word */
1582static bool pt_is_word_beginning(spt_t *pt)
1583{
1584 spt_t lp, sfp, efp, slp, elp;
1585 coord_t coord;
1586
1587 pt_get_sof(&sfp);
1588 pt_get_eof(&efp);
1589 pt_get_sol(pt, &slp);
1590 pt_get_eol(pt, &elp);
1591
1592 /* the spt is at the beginning or end of the file or line */
1593 if ((spt_cmp(&sfp, pt) == 0) || (spt_cmp(&efp, pt) == 0) ||
1594 (spt_cmp(&slp, pt) == 0) || (spt_cmp(&elp, pt) == 0))
1595 return true;
1596
1597 /* the spt is a delimiter */
1598 if (pt_is_delimiter(pt))
1599 return false;
1600
1601 spt_get_coord(pt, &coord);
1602
1603 coord.column -= 1;
1604 sheet_get_cell_pt(doc.sh, &coord, dir_before, &lp);
1605
1606 return pt_is_delimiter(&lp) ||
1607 (pt_is_punctuation(pt) && !pt_is_punctuation(&lp)) ||
1608 (pt_is_punctuation(&lp) && !pt_is_punctuation(pt));
1609}
1610
1611static char32_t get_first_wchar(const char *str)
1612{
1613 size_t offset = 0;
1614 return str_decode(str, &offset, str_size(str));
1615}
1616
1617static bool pt_is_delimiter(spt_t *pt)
1618{
1619 spt_t rp;
1620 coord_t coord;
1621 char *ch = NULL;
1622
1623 spt_get_coord(pt, &coord);
1624
1625 coord.column += 1;
1626 sheet_get_cell_pt(doc.sh, &coord, dir_after, &rp);
1627
1628 ch = range_get_str(pt, &rp);
1629 if (ch == NULL)
1630 return false;
1631
1632 char32_t first_char = get_first_wchar(ch);
1633 switch (first_char) {
1634 case ' ':
1635 case '\t':
1636 case '\n':
1637 return true;
1638 default:
1639 return false;
1640 }
1641}
1642
1643static bool pt_is_punctuation(spt_t *pt)
1644{
1645 spt_t rp;
1646 coord_t coord;
1647 char *ch = NULL;
1648
1649 spt_get_coord(pt, &coord);
1650
1651 coord.column += 1;
1652 sheet_get_cell_pt(doc.sh, &coord, dir_after, &rp);
1653
1654 ch = range_get_str(pt, &rp);
1655 if (ch == NULL)
1656 return false;
1657
1658 char32_t first_char = get_first_wchar(ch);
1659 switch (first_char) {
1660 case ',':
1661 case '.':
1662 case ';':
1663 case ':':
1664 case '/':
1665 case '?':
1666 case '\\':
1667 case '|':
1668 case '_':
1669 case '+':
1670 case '-':
1671 case '*':
1672 case '=':
1673 case '<':
1674 case '>':
1675 return true;
1676 default:
1677 return false;
1678 }
1679}
1680
1681/** Compare tags. */
1682static int tag_cmp(tag_t const *a, tag_t const *b)
1683{
1684 spt_t pa, pb;
1685
1686 tag_get_pt(a, &pa);
1687 tag_get_pt(b, &pb);
1688
1689 return spt_cmp(&pa, &pb);
1690}
1691
1692/** Compare s-points. */
1693static int spt_cmp(spt_t const *a, spt_t const *b)
1694{
1695 coord_t ca, cb;
1696
1697 spt_get_coord(a, &ca);
1698 spt_get_coord(b, &cb);
1699
1700 return coord_cmp(&ca, &cb);
1701}
1702
1703/** Compare coordinats. */
1704static int coord_cmp(coord_t const *a, coord_t const *b)
1705{
1706 if (a->row - b->row != 0)
1707 return a->row - b->row;
1708
1709 return a->column - b->column;
1710}
1711
1712/** Display text in the status line. */
1713static void status_display(char const *str)
1714{
1715 console_set_pos(con, 0, scr_rows - 1);
1716 console_set_style(con, STYLE_INVERTED);
1717
1718 int pos = -(scr_columns - 3);
1719 printf(" %*s ", pos, str);
1720 console_flush(con);
1721 console_set_style(con, STYLE_NORMAL);
1722
1723 pane.rflags |= REDRAW_CARET;
1724}
1725
1726/** @}
1727 */
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