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Date:: Sun Jun 20 21:20:54 2021 UTC
Message:: bring back the ugly hack for the side window
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1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <string.h>
18 #include <stdlib.h>
19 
20 #include "telescope.h"
21 #include "cmd.gen.h"
22 
23 void
24 cmd_previous_line(struct buffer *buffer)
25 {
26 	struct vline	*vl;
27 
28 	if (buffer->current_line == NULL
29 	    || (vl = TAILQ_PREV(buffer->current_line, vhead, vlines)) == NULL)
30 		return;
31 
32 	if (--buffer->curs_y < 0) {
33 		buffer->curs_y = 0;
34 		cmd_scroll_line_up(buffer);
35 		return;
36 	}
37 
38 	buffer->current_line = vl;
39 	restore_cursor(buffer);
40 }
41 
42 void
43 cmd_next_line(struct buffer *buffer)
44 {
45 	struct vline	*vl;
46 
47 	if (buffer->current_line == NULL
48 	    || (vl = TAILQ_NEXT(buffer->current_line, vlines)) == NULL)
49 		return;
50 
51 	if (++buffer->curs_y > body_lines-1) {
52 		buffer->curs_y = body_lines-1;
53 		cmd_scroll_line_down(buffer);
54 		return;
55 	}
56 
57 	buffer->current_line = vl;
58 	restore_cursor(buffer);
59 }
60 
61 void
62 cmd_backward_char(struct buffer *buffer)
63 {
64 	if (buffer->cpoff != 0)
65 		buffer->cpoff--;
66 	restore_cursor(buffer);
67 }
68 
69 void
70 cmd_forward_char(struct buffer *buffer)
71 {
72 	size_t len = 0;
73 
74 	if (buffer->current_line->line != NULL)
75 		len = utf8_cplen(buffer->current_line->line);
76 	if (++buffer->cpoff > len)
77 		buffer->cpoff = len;
78 	restore_cursor(buffer);
79 }
80 
81 void
82 cmd_backward_paragraph(struct buffer *buffer)
83 {
84 	do {
85 		if (buffer->current_line == NULL ||
86 		    buffer->current_line == TAILQ_FIRST(&buffer->head)) {
87 			message("No previous paragraph");
88 			return;
89 		}
90 		cmd_previous_line(buffer);
91 	} while (buffer->current_line->line != NULL ||
92 	    buffer->current_line->parent->type != LINE_TEXT);
93 }
94 
95 void
96 cmd_forward_paragraph(struct buffer *buffer)
97 {
98 	do {
99 		if (buffer->current_line == NULL ||
100 		    buffer->current_line == TAILQ_LAST(&buffer->head, vhead)) {
101 			message("No next paragraph");
102 			return;
103 		}
104 		cmd_next_line(buffer);
105 	} while (buffer->current_line->line != NULL ||
106 	    buffer->current_line->parent->type != LINE_TEXT);
107 }
108 
109 void
110 cmd_move_beginning_of_line(struct buffer *buffer)
111 {
112 	buffer->cpoff = 0;
113 	restore_cursor(buffer);
114 }
115 
116 void
117 cmd_move_end_of_line(struct buffer *buffer)
118 {
119 	struct vline	*vl;
120 
121 	vl = buffer->current_line;
122 	if (vl->line == NULL)
123 		return;
124 	buffer->cpoff = utf8_cplen(vl->line);
125 	restore_cursor(buffer);
126 }
127 
128 void
129 cmd_redraw(struct buffer *buffer)
130 {
131         ui_schedule_redraw();
132 }
133 
134 void
135 cmd_scroll_line_up(struct buffer *buffer)
136 {
137 	if (buffer->current_line == NULL)
138 		return;
139 
140 	if (buffer->line_off == 0)
141 		return;
142 
143 	buffer->line_off--;
144 	buffer->current_line = TAILQ_PREV(buffer->current_line, vhead, vlines);
145 	restore_cursor(buffer);
146 }
147 
148 void
149 cmd_scroll_line_down(struct buffer *buffer)
150 {
151 	struct vline	*vl;
152 
153 	if (buffer->current_line == NULL)
154 		return;
155 
156 	if ((vl = TAILQ_NEXT(buffer->current_line, vlines)) == NULL)
157 		return;
158 
159 	buffer->current_line = vl;
160 	buffer->line_off++;
161 	restore_cursor(buffer);
162 }
163 
164 void
165 cmd_scroll_up(struct buffer *buffer)
166 {
167 	size_t off;
168 
169 	off = body_lines-1;
170 
171 	for (; off > 0; --off)
172 		cmd_scroll_line_up(buffer);
173 }
174 
175 void
176 cmd_scroll_down(struct buffer *buffer)
177 {
178 	size_t off;
179 
180 	off = body_lines-1;
181 
182 	for (; off > 0; --off)
183 		cmd_scroll_line_down(buffer);
184 }
185 
186 void
187 cmd_beginning_of_buffer(struct buffer *buffer)
188 {
189 	buffer->current_line = TAILQ_FIRST(&buffer->head);
190 	buffer->line_off = 0;
191 	buffer->curs_y = 0;
192 	buffer->cpoff = 0;
193 	restore_cursor(buffer);
194 }
195 
196 void
197 cmd_end_of_buffer(struct buffer *buffer)
198 {
199 	ssize_t off;
200 
201 	off = buffer->line_max - body_lines;
202 	off = MAX(0, off);
203 
204 	buffer->line_off = off;
205 	buffer->curs_y = MIN((size_t)body_lines-1, buffer->line_max-1);
206 
207 	buffer->current_line = TAILQ_LAST(&buffer->head, vhead);
208 	buffer->cpoff = body_cols;
209 	restore_cursor(buffer);
210 }
211 
212 void
213 cmd_kill_telescope(struct buffer *buffer)
214 {
215 	save_session();
216 	event_loopbreak();
217 }
218 
219 void
220 cmd_push_button(struct buffer *buffer)
221 {
222 	struct vline	*vl;
223 
224 	vl = buffer->current_line;
225 	if (vl->parent->type != LINE_LINK)
226 		return;
227 
228 	load_url_in_tab(current_tab(), vl->parent->alt);
229 }
230 
231 void
232 cmd_push_button_new_tab(struct buffer *buffer)
233 {
234 	struct vline	*vl;
235 
236 	vl = buffer->current_line;
237 	if (vl->parent->type != LINE_LINK)
238 		return;
239 
240 	new_tab(vl->parent->alt);
241 }
242 
243 void
244 cmd_previous_button(struct buffer *buffer)
245 {
246 	do {
247 		if (buffer->current_line == NULL ||
248 		    buffer->current_line == TAILQ_FIRST(&buffer->head)) {
249 			message("No previous link");
250 			return;
251 		}
252 		cmd_previous_line(buffer);
253 	} while (buffer->current_line->parent->type != LINE_LINK);
254 }
255 
256 void
257 cmd_next_button(struct buffer *buffer)
258 {
259 	do {
260 		if (buffer->current_line == NULL ||
261 		    buffer->current_line == TAILQ_LAST(&buffer->head, vhead)) {
262 			message("No next link");
263 			return;
264 		}
265 		cmd_next_line(buffer);
266 	} while (buffer->current_line->parent->type != LINE_LINK);
267 }
268 
269 void
270 cmd_previous_page(struct buffer *buffer)
271 {
272 	struct tab *tab = current_tab();
273 
274 	if (!load_previous_page(tab))
275 		message("No previous page");
276 	else
277 		start_loading_anim(tab);
278 }
279 
280 void
281 cmd_next_page(struct buffer *buffer)
282 {
283 	struct tab *tab = current_tab();
284 
285 	if (!load_next_page(tab))
286 		message("No next page");
287 	else
288 		start_loading_anim(tab);
289 }
290 
291 void
292 cmd_clear_minibuf(struct buffer *buffer)
293 {
294         message(NULL);
295 }
296 
297 void
298 cmd_execute_extended_command(struct buffer *buffer)
299 {
300 	size_t	 len;
301 
302 	if (in_minibuffer) {
303 		message("We don't have enable-recursive-minibuffers");
304 		return;
305 	}
306 
307 	enter_minibuffer(eecmd_self_insert, eecmd_select, exit_minibuffer,
308 	    &eecmd_history);
309 
310 	len = sizeof(ministate.prompt);
311 	strlcpy(ministate.prompt, "", len);
312 
313 	if (thiskey.meta)
314 		strlcat(ministate.prompt, "M-", len);
315 
316 	strlcat(ministate.prompt, ui_keyname(thiskey.key), len);
317 
318 	if (thiskey.meta)
319 		strlcat(ministate.prompt, " ", len);
320 }
321 
322 void
323 cmd_tab_close(struct buffer *buffer)
324 {
325 	struct tab *tab, *t;
326 
327 	tab = current_tab();
328 	if (TAILQ_PREV(tab, tabshead, tabs) == NULL &&
329 	    TAILQ_NEXT(tab, tabs) == NULL) {
330 		message("Can't close the only tab.");
331 		return;
332 	}
333 
334 	if (evtimer_pending(&tab->loadingev, NULL))
335 		evtimer_del(&tab->loadingev);
336 
337 	stop_tab(tab);
338 
339 	if ((t = TAILQ_PREV(tab, tabshead, tabs)) == NULL)
340 		t = TAILQ_NEXT(tab, tabs);
341 	TAILQ_REMOVE(&tabshead, tab, tabs);
342 	free(tab);
343 
344 	switch_to_tab(t);
345 }
346 
347 void
348 cmd_tab_close_other(struct buffer *buffer)
349 {
350 	struct tab *t, *i;
351 
352 	TAILQ_FOREACH_SAFE(t, &tabshead, tabs, i) {
353 		if (t->flags & TAB_CURRENT)
354 			continue;
355 
356 		stop_tab(t);
357 		TAILQ_REMOVE(&tabshead, t, tabs);
358 		free(t);
359 	}
360 }
361 
362 void
363 cmd_tab_new(struct buffer *buffer)
364 {
365 	const char *url;
366 
367 	if ((url = new_tab_url) == NULL)
368 		url = NEW_TAB_URL;
369 
370 	new_tab(url);
371 }
372 
373 void
374 cmd_tab_next(struct buffer *buffer)
375 {
376 	struct tab *tab, *t;
377 
378 	tab = current_tab();
379 	tab->flags &= ~TAB_CURRENT;
380 
381 	if ((t = TAILQ_NEXT(tab, tabs)) == NULL)
382 		t = TAILQ_FIRST(&tabshead);
383 	t->flags |= TAB_CURRENT;
384 	t->flags &= ~TAB_URGENT;
385 }
386 
387 void
388 cmd_tab_previous(struct buffer *buffer)
389 {
390 	struct tab *tab, *t;
391 
392 	tab = current_tab();
393 	tab->flags &= ~TAB_CURRENT;
394 
395 	if ((t = TAILQ_PREV(tab, tabshead, tabs)) == NULL)
396 		t = TAILQ_LAST(&tabshead, tabshead);
397 	t->flags |= TAB_CURRENT;
398 	t->flags &= ~TAB_URGENT;
399 }
400 
401 void
402 cmd_tab_move(struct buffer *buffer)
403 {
404 	struct tab *tab, *t;
405 
406 	tab = current_tab();
407 	t = TAILQ_NEXT(tab, tabs);
408 	TAILQ_REMOVE(&tabshead, tab, tabs);
409 
410 	if (t == NULL)
411 		TAILQ_INSERT_HEAD(&tabshead, tab, tabs);
412 	else
413 		TAILQ_INSERT_AFTER(&tabshead, t, tab, tabs);
414 }
415 
416 void
417 cmd_tab_move_to(struct buffer *buffer)
418 {
419 	struct tab *tab, *t;
420 
421 	tab = current_tab();
422 	t = TAILQ_PREV(tab, tabshead, tabs);
423 	TAILQ_REMOVE(&tabshead, tab, tabs);
424 
425 	if (t == NULL) {
426 		if (TAILQ_EMPTY(&tabshead))
427 			TAILQ_INSERT_HEAD(&tabshead, tab, tabs);
428 		else
429 			TAILQ_INSERT_TAIL(&tabshead, tab, tabs);
430 	} else
431 		TAILQ_INSERT_BEFORE(t, tab, tabs);
432 }
433 
434 void
435 cmd_load_url(struct buffer *buffer)
436 {
437 	if (in_minibuffer) {
438 		message("We don't have enable-recursive-minibuffers");
439 		return;
440 	}
441 
442 	enter_minibuffer(lu_self_insert, lu_select, exit_minibuffer,
443 	    &lu_history);
444 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
445 	strlcpy(ministate.buf, "gemini://", sizeof(ministate.buf));
446 	cmd_move_end_of_line(&ministate.buffer);
447 }
448 
449 void
450 cmd_load_current_url(struct buffer *buffer)
451 {
452 	struct tab *tab = current_tab();
453 
454 	if (in_minibuffer) {
455 		message("We don't have enable-recursive-minibuffers");
456 		return;
457 	}
458 
459 	enter_minibuffer(lu_self_insert, lu_select, exit_minibuffer,
460 	    &lu_history);
461 	strlcpy(ministate.prompt, "Load URL: ", sizeof(ministate.prompt));
462 	strlcpy(ministate.buf, tab->hist_cur->h, sizeof(ministate.buf));
463 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
464 }
465 
466 void
467 cmd_bookmark_page(struct buffer *buffer)
468 {
469 	struct tab *tab = current_tab();
470 
471 	enter_minibuffer(lu_self_insert, bp_select, exit_minibuffer, NULL);
472 	strlcpy(ministate.prompt, "Bookmark URL: ", sizeof(ministate.prompt));
473 	strlcpy(ministate.buf, tab->hist_cur->h, sizeof(ministate.buf));
474 	ministate.buffer.cpoff = utf8_cplen(ministate.buf);
475 }
476 
477 void
478 cmd_list_bookmarks(struct buffer *buffer)
479 {
480 	load_url_in_tab(current_tab(), "about:bookmarks");
481 }
482 
483 void
484 cmd_toggle_help(struct buffer *buffer)
485 {
486 	ui_toggle_side_window();
487 }
488 
489 void
490 cmd_olivetti_mode(struct buffer *buffer)
491 {
492 	olivetti_mode = !olivetti_mode;
493 	if (olivetti_mode)
494 		message("olivetti-mode enabled");
495 	else
496 		message("olivetti-mode disabled");
497 
498 	ui_schedule_redraw();
499 }
500 
501 void
502 cmd_mini_delete_char(struct buffer *buffer)
503 {
504 	char *c, *n;
505 
506 	if (!in_minibuffer) {
507 		message("text is read-only");
508 		return;
509 	}
510 
511 	minibuffer_taint_hist();
512 
513 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
514 	if (*c == '\0')
515 		return;
516 	n = utf8_next_cp(c);
517 
518 	memmove(c, n, strlen(n)+1);
519 }
520 
521 void
522 cmd_mini_delete_backward_char(struct buffer *buffer)
523 {
524 	char *c, *p, *start;
525 
526 	if (!in_minibuffer) {
527 		message("text is read-only");
528 		return;
529 	}
530 
531 	minibuffer_taint_hist();
532 
533 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
534 	start = buffer->current_line->line;
535 	if (c == start)
536 		return;
537 	p = utf8_prev_cp(c-1, start);
538 
539 	memmove(p, c, strlen(c)+1);
540 	buffer->cpoff--;
541 }
542 
543 void
544 cmd_mini_kill_line(struct buffer *buffer)
545 {
546 	char *c;
547 
548 	if (!in_minibuffer) {
549 		message("text is read-only");
550 		return;
551 	}
552 
553 	minibuffer_taint_hist();
554 	c = utf8_nth(buffer->current_line->line, buffer->cpoff);
555 	*c = '\0';
556 }
557 
558 void
559 cmd_mini_abort(struct buffer *buffer)
560 {
561 	if (!in_minibuffer)
562 		return;
563 
564 	ministate.abortfn();
565 }
566 
567 void
568 cmd_mini_complete_and_exit(struct buffer *buffer)
569 {
570 	if (!in_minibuffer)
571 		return;
572 
573 	minibuffer_taint_hist();
574 	ministate.donefn();
575 }
576 
577 void
578 cmd_mini_previous_history_element(struct buffer *buffer)
579 {
580 	if (ministate.history == NULL) {
581 		message("No history");
582 		return;
583 	}
584 
585 	if (ministate.hist_cur == NULL ||
586 	    (ministate.hist_cur = TAILQ_PREV(ministate.hist_cur, mhisthead, entries)) == NULL) {
587 		ministate.hist_cur = TAILQ_LAST(&ministate.history->head, mhisthead);
588 		ministate.hist_off = ministate.history->len - 1;
589 		if (ministate.hist_cur == NULL)
590 			message("No prev item");
591 	} else {
592 		ministate.hist_off--;
593 	}
594 
595 	if (ministate.hist_cur != NULL)
596 		buffer->current_line->line = ministate.hist_cur->h;
597 }
598 
599 void
600 cmd_mini_next_history_element(struct buffer *buffer)
601 {
602 	if (ministate.history == NULL) {
603 		message("No history");
604 		return;
605 	}
606 
607 	if (ministate.hist_cur == NULL ||
608 	    (ministate.hist_cur = TAILQ_NEXT(ministate.hist_cur, entries)) == NULL) {
609 		ministate.hist_cur = TAILQ_FIRST(&ministate.history->head);
610 		ministate.hist_off = 0;
611 		if (ministate.hist_cur == NULL)
612 			message("No next item");
613 	} else {
614 		ministate.hist_off++;
615 	}
616 
617 	if (ministate.hist_cur != NULL)
618 		buffer->current_line->line = ministate.hist_cur->h;
619 }