source: mainline/uspace/lib/gui/terminal.c@ 5d94b16c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 5d94b16c was 5d94b16c, checked in by Jiri Svoboda <jiri@…>, 13 years ago

Factor out server side of console IPC protocol.
  • Property mode set to 100644
File size: 19.2 KB
Line 
1/*
2 * Copyright (c) 2012 Petr Koupy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup gui
30 * @{
31 */
32/**
33 * @file
34 */
35
36#include <errno.h>
37#include <malloc.h>
38#include <io/chargrid.h>
39#include <surface.h>
40#include <gfx/font-8x16.h>
41#include <io/con_srv.h>
42#include <io/concaps.h>
43#include <io/console.h>
44#include <task.h>
45#include <adt/list.h>
46#include <adt/prodcons.h>
47#include <atomic.h>
48#include <stdarg.h>
49#include "window.h"
50#include "terminal.h"
51
52#define NAME "vterm"
53#define NAMESPACE "vterm"
54
55#define LOCFS_MOUNT_POINT "/loc"
56
57#define APP_GETTERM "/app/getterm"
58
59#define TERM_CAPS \
60 (CONSOLE_CAP_STYLE | CONSOLE_CAP_INDEXED | CONSOLE_CAP_RGB)
61
62static LIST_INITIALIZE(terms);
63
64static int term_open(con_srvs_t *, con_srv_t *);
65static int term_close(con_srv_t *);
66static int term_read(con_srv_t *, void *, size_t);
67static int term_write(con_srv_t *, void *, size_t);
68static void term_sync(con_srv_t *);
69static void term_clear(con_srv_t *);
70static void term_set_pos(con_srv_t *, sysarg_t col, sysarg_t row);
71static int term_get_pos(con_srv_t *, sysarg_t *, sysarg_t *);
72static int term_get_size(con_srv_t *, sysarg_t *, sysarg_t *);
73static int term_get_color_cap(con_srv_t *, console_caps_t *);
74static void term_set_style(con_srv_t *, console_style_t);
75static void term_set_color(con_srv_t *, console_color_t, console_color_t,
76 console_color_attr_t);
77static void term_set_rgb_color(con_srv_t *, pixel_t, pixel_t);
78static void term_set_cursor_visibility(con_srv_t *, bool);
79static int term_get_event(con_srv_t *, kbd_event_t *);
80
81static con_ops_t con_ops = {
82 .open = term_open,
83 .close = term_close,
84 .read = term_read,
85 .write = term_write,
86 .sync = term_sync,
87 .clear = term_clear,
88 .set_pos = term_set_pos,
89 .get_pos = term_get_pos,
90 .get_size = term_get_size,
91 .get_color_cap = term_get_color_cap,
92 .set_style = term_set_style,
93 .set_color = term_set_color,
94 .set_rgb_color = term_set_rgb_color,
95 .set_cursor_visibility = term_set_cursor_visibility,
96 .get_event = term_get_event
97};
98
99static terminal_t *srv_to_terminal(con_srv_t *srv)
100{
101 return srv->srvs->sarg;
102}
103
104static void getterm(const char *svc, const char *app)
105{
106 char term[LOC_NAME_MAXLEN];
107 snprintf(term, LOC_NAME_MAXLEN, "%s/%s", LOCFS_MOUNT_POINT, svc);
108
109 /* Wait for the terminal service to be ready */
110 service_id_t service_id;
111 int rc = loc_service_get_id(svc, &service_id, IPC_FLAG_BLOCKING);
112 if (rc != EOK)
113 return;
114
115 task_spawnl(NULL, APP_GETTERM, APP_GETTERM, "-w", term, app, NULL);
116}
117
118static pixel_t color_table[16] = {
119 [COLOR_BLACK] = PIXEL(255, 0, 0, 0),
120 [COLOR_BLUE] = PIXEL(255, 0, 0, 240),
121 [COLOR_GREEN] = PIXEL(255, 0, 240, 0),
122 [COLOR_CYAN] = PIXEL(255, 0, 240, 240),
123 [COLOR_RED] = PIXEL(255, 240, 0, 0),
124 [COLOR_MAGENTA] = PIXEL(255, 240, 0, 240),
125 [COLOR_YELLOW] = PIXEL(255, 240, 240, 0),
126 [COLOR_WHITE] = PIXEL(255, 240, 240, 240),
127
128 [COLOR_BLACK + 8] = PIXEL(255, 0, 0, 0),
129 [COLOR_BLUE + 8] = PIXEL(255, 0, 0, 255),
130 [COLOR_GREEN + 8] = PIXEL(255, 0, 255, 0),
131 [COLOR_CYAN + 8] = PIXEL(255, 0, 255, 255),
132 [COLOR_RED + 8] = PIXEL(255, 255, 0, 0),
133 [COLOR_MAGENTA + 8] = PIXEL(255, 255, 0, 255),
134 [COLOR_YELLOW + 8] = PIXEL(255, 255, 255, 0),
135 [COLOR_WHITE + 8] = PIXEL(255, 255, 255, 255),
136};
137
138static inline void attrs_rgb(char_attrs_t attrs, pixel_t *bgcolor, pixel_t *fgcolor)
139{
140 switch (attrs.type) {
141 case CHAR_ATTR_STYLE:
142 switch (attrs.val.style) {
143 case STYLE_NORMAL:
144 *bgcolor = color_table[COLOR_WHITE];
145 *fgcolor = color_table[COLOR_BLACK];
146 break;
147 case STYLE_EMPHASIS:
148 *bgcolor = color_table[COLOR_WHITE];
149 *fgcolor = color_table[COLOR_RED];
150 break;
151 case STYLE_INVERTED:
152 *bgcolor = color_table[COLOR_BLACK];
153 *fgcolor = color_table[COLOR_WHITE];
154 break;
155 case STYLE_SELECTED:
156 *bgcolor = color_table[COLOR_RED];
157 *fgcolor = color_table[COLOR_WHITE];
158 break;
159 }
160 break;
161 case CHAR_ATTR_INDEX:
162 *bgcolor = color_table[(attrs.val.index.bgcolor & 7) |
163 ((attrs.val.index.attr & CATTR_BRIGHT) ? 8 : 0)];
164 *fgcolor = color_table[(attrs.val.index.fgcolor & 7) |
165 ((attrs.val.index.attr & CATTR_BRIGHT) ? 8 : 0)];
166 break;
167 case CHAR_ATTR_RGB:
168 *bgcolor = 0xff000000 | attrs.val.rgb.bgcolor;
169 *fgcolor = 0xff000000 | attrs.val.rgb.fgcolor;
170 break;
171 }
172}
173
174static void term_update_char(terminal_t *term, surface_t *surface,
175 sysarg_t sx, sysarg_t sy, sysarg_t col, sysarg_t row)
176{
177 charfield_t *field =
178 chargrid_charfield_at(term->backbuf, col, row);
179
180 bool inverted = chargrid_cursor_at(term->backbuf, col, row);
181
182 sysarg_t bx = sx + (col * FONT_WIDTH);
183 sysarg_t by = sy + (row * FONT_SCANLINES);
184
185 pixel_t bgcolor = 0;
186 pixel_t fgcolor = 0;
187
188 if (inverted)
189 attrs_rgb(field->attrs, &fgcolor, &bgcolor);
190 else
191 attrs_rgb(field->attrs, &bgcolor, &fgcolor);
192
193 // FIXME: Glyph type should be actually uint32_t
194 // for full UTF-32 coverage.
195
196 uint16_t glyph = fb_font_glyph(field->ch);
197
198 // FIXME: This font drawing routine is shamelessly
199 // suboptimal. It should be optimized for
200 // aligned memory transfers, etc.
201
202 for (unsigned int y = 0; y < FONT_SCANLINES; y++) {
203 for (unsigned int x = 0; x < FONT_WIDTH; x++) {
204 pixel_t pixel =
205 (fb_font[glyph][y] & (1 << (7 - x))) ? fgcolor : bgcolor;
206 surface_put_pixel(surface, bx + x, by + y, pixel);
207 }
208 }
209}
210
211static bool term_update_scroll(terminal_t *term, surface_t *surface,
212 sysarg_t sx, sysarg_t sy)
213{
214 sysarg_t top_row = chargrid_get_top_row(term->frontbuf);
215
216 if (term->top_row == top_row)
217 return false;
218
219 term->top_row = top_row;
220
221 for (sysarg_t row = 0; row < term->rows; row++) {
222 for (sysarg_t col = 0; col < term->cols; col++) {
223 charfield_t *front_field =
224 chargrid_charfield_at(term->frontbuf, col, row);
225 charfield_t *back_field =
226 chargrid_charfield_at(term->backbuf, col, row);
227 bool update = false;
228
229 if (front_field->ch != back_field->ch) {
230 back_field->ch = front_field->ch;
231 update = true;
232 }
233
234 if (!attrs_same(front_field->attrs, back_field->attrs)) {
235 back_field->attrs = front_field->attrs;
236 update = true;
237 }
238
239 front_field->flags &= ~CHAR_FLAG_DIRTY;
240
241 if (update)
242 term_update_char(term, surface, sx, sy, col, row);
243 }
244 }
245
246 return true;
247}
248
249static bool term_update_cursor(terminal_t *term, surface_t *surface,
250 sysarg_t sx, sysarg_t sy)
251{
252 bool damage = false;
253
254 sysarg_t front_col;
255 sysarg_t front_row;
256 chargrid_get_cursor(term->frontbuf, &front_col, &front_row);
257
258 sysarg_t back_col;
259 sysarg_t back_row;
260 chargrid_get_cursor(term->backbuf, &back_col, &back_row);
261
262 bool front_visibility =
263 chargrid_get_cursor_visibility(term->frontbuf);
264 bool back_visibility =
265 chargrid_get_cursor_visibility(term->backbuf);
266
267 if (front_visibility != back_visibility) {
268 chargrid_set_cursor_visibility(term->backbuf,
269 front_visibility);
270 term_update_char(term, surface, sx, sy, back_col, back_row);
271 damage = true;
272 }
273
274 if ((front_col != back_col) || (front_row != back_row)) {
275 chargrid_set_cursor(term->backbuf, front_col, front_row);
276 term_update_char(term, surface, sx, sy, back_col, back_row);
277 term_update_char(term, surface, sx, sy, front_col, front_row);
278 damage = true;
279 }
280
281 return damage;
282}
283
284static void term_update(terminal_t *term)
285{
286 fibril_mutex_lock(&term->mtx);
287
288 surface_t *surface = window_claim(term->widget.window);
289 if (!surface) {
290 window_yield(term->widget.window);
291 fibril_mutex_unlock(&term->mtx);
292 return;
293 }
294
295 bool damage = false;
296 sysarg_t sx = term->widget.hpos;
297 sysarg_t sy = term->widget.vpos;
298
299 if (term_update_scroll(term, surface, sx, sy)) {
300 damage = true;
301 } else {
302 for (sysarg_t y = 0; y < term->rows; y++) {
303 for (sysarg_t x = 0; x < term->cols; x++) {
304 charfield_t *front_field =
305 chargrid_charfield_at(term->frontbuf, x, y);
306 charfield_t *back_field =
307 chargrid_charfield_at(term->backbuf, x, y);
308 bool update = false;
309
310 if ((front_field->flags & CHAR_FLAG_DIRTY) ==
311 CHAR_FLAG_DIRTY) {
312 if (front_field->ch != back_field->ch) {
313 back_field->ch = front_field->ch;
314 update = true;
315 }
316
317 if (!attrs_same(front_field->attrs,
318 back_field->attrs)) {
319 back_field->attrs = front_field->attrs;
320 update = true;
321 }
322
323 front_field->flags &= ~CHAR_FLAG_DIRTY;
324 }
325
326 if (update) {
327 term_update_char(term, surface, sx, sy, x, y);
328 damage = true;
329 }
330 }
331 }
332 }
333
334 if (term_update_cursor(term, surface, sx, sy))
335 damage = true;
336
337 window_yield(term->widget.window);
338
339 if (damage)
340 window_damage(term->widget.window);
341
342 fibril_mutex_unlock(&term->mtx);
343}
344
345static void term_damage(terminal_t *term)
346{
347 fibril_mutex_lock(&term->mtx);
348
349 surface_t *surface = window_claim(term->widget.window);
350 if (!surface) {
351 window_yield(term->widget.window);
352 fibril_mutex_unlock(&term->mtx);
353 return;
354 }
355
356 sysarg_t sx = term->widget.hpos;
357 sysarg_t sy = term->widget.vpos;
358
359 if (!term_update_scroll(term, surface, sx, sy)) {
360 for (sysarg_t y = 0; y < term->rows; y++) {
361 for (sysarg_t x = 0; x < term->cols; x++) {
362 charfield_t *front_field =
363 chargrid_charfield_at(term->frontbuf, x, y);
364 charfield_t *back_field =
365 chargrid_charfield_at(term->backbuf, x, y);
366
367 back_field->ch = front_field->ch;
368 back_field->attrs = front_field->attrs;
369 front_field->flags &= ~CHAR_FLAG_DIRTY;
370
371 term_update_char(term, surface, sx, sy, x, y);
372 }
373 }
374 }
375
376 term_update_cursor(term, surface, sx, sy);
377
378 window_yield(term->widget.window);
379 window_damage(term->widget.window);
380
381 fibril_mutex_unlock(&term->mtx);
382}
383
384static int term_open(con_srvs_t *srvs, con_srv_t *srv)
385{
386 return EOK;
387}
388
389static int term_close(con_srv_t *srv)
390{
391 return EOK;
392}
393
394static int term_read(con_srv_t *srv, void *buf, size_t size)
395{
396 terminal_t *term = srv_to_terminal(srv);
397 uint8_t *bbuf = buf;
398 size_t pos = 0;
399
400 /*
401 * Read input from keyboard and copy it to the buffer.
402 * We need to handle situation when wchar is split by 2 following
403 * reads.
404 */
405 while (pos < size) {
406 /* Copy to the buffer remaining characters. */
407 while ((pos < size) && (term->char_remains_len > 0)) {
408 bbuf[pos] = term->char_remains[0];
409 pos++;
410
411 /* Unshift the array. */
412 for (size_t i = 1; i < term->char_remains_len; i++)
413 term->char_remains[i - 1] = term->char_remains[i];
414
415 term->char_remains_len--;
416 }
417
418 /* Still not enough? Then get another key from the queue. */
419 if (pos < size) {
420 link_t *link = prodcons_consume(&term->input_pc);
421 kbd_event_t *event = list_get_instance(link, kbd_event_t, link);
422
423 /* Accept key presses of printable chars only. */
424 if ((event->type == KEY_PRESS) && (event->c != 0)) {
425 wchar_t tmp[2] = {
426 event->c,
427 0
428 };
429
430 wstr_to_str(term->char_remains, UTF8_CHAR_BUFFER_SIZE, tmp);
431 term->char_remains_len = str_size(term->char_remains);
432 }
433
434 free(event);
435 }
436 }
437
438 return size;
439}
440
441static void term_write_char(terminal_t *term, wchar_t ch)
442{
443 sysarg_t updated = 0;
444
445 fibril_mutex_lock(&term->mtx);
446
447 switch (ch) {
448 case '\n':
449 updated = chargrid_newline(term->frontbuf);
450 break;
451 case '\r':
452 break;
453 case '\t':
454 updated = chargrid_tabstop(term->frontbuf, 8);
455 break;
456 case '\b':
457 updated = chargrid_backspace(term->frontbuf);
458 break;
459 default:
460 updated = chargrid_putchar(term->frontbuf, ch, true);
461 }
462
463 fibril_mutex_unlock(&term->mtx);
464
465 if (updated > 1)
466 term_update(term);
467}
468
469static int term_write(con_srv_t *srv, void *data, size_t size)
470{
471 terminal_t *term = srv_to_terminal(srv);
472
473 size_t off = 0;
474 while (off < size)
475 term_write_char(term, str_decode(data, &off, size));
476
477 return size;
478}
479
480static void term_sync(con_srv_t *srv)
481{
482 terminal_t *term = srv_to_terminal(srv);
483
484 term_update(term);
485}
486
487static void term_clear(con_srv_t *srv)
488{
489 terminal_t *term = srv_to_terminal(srv);
490
491 fibril_mutex_lock(&term->mtx);
492 chargrid_clear(term->frontbuf);
493 fibril_mutex_unlock(&term->mtx);
494
495 term_update(term);
496}
497
498static void term_set_pos(con_srv_t *srv, sysarg_t col, sysarg_t row)
499{
500 terminal_t *term = srv_to_terminal(srv);
501
502 fibril_mutex_lock(&term->mtx);
503 chargrid_set_cursor(term->frontbuf, col, row);
504 fibril_mutex_unlock(&term->mtx);
505
506 term_update(term);
507}
508
509static int term_get_pos(con_srv_t *srv, sysarg_t *col, sysarg_t *row)
510{
511 terminal_t *term = srv_to_terminal(srv);
512
513 fibril_mutex_lock(&term->mtx);
514 chargrid_get_cursor(term->frontbuf, col, row);
515 fibril_mutex_unlock(&term->mtx);
516
517 return EOK;
518}
519
520static int term_get_size(con_srv_t *srv, sysarg_t *cols, sysarg_t *rows)
521{
522 terminal_t *term = srv_to_terminal(srv);
523
524 fibril_mutex_lock(&term->mtx);
525 *cols = term->cols;
526 *rows = term->rows;
527 fibril_mutex_unlock(&term->mtx);
528
529 return EOK;
530}
531
532static int term_get_color_cap(con_srv_t *srv, console_caps_t *caps)
533{
534 (void) srv;
535 *caps = TERM_CAPS;
536
537 return EOK;
538}
539
540static void term_set_style(con_srv_t *srv, console_style_t style)
541{
542 terminal_t *term = srv_to_terminal(srv);
543
544 fibril_mutex_lock(&term->mtx);
545 chargrid_set_style(term->frontbuf, style);
546 fibril_mutex_unlock(&term->mtx);
547}
548
549static void term_set_color(con_srv_t *srv, console_color_t bgcolor,
550 console_color_t fgcolor, console_color_attr_t attr)
551{
552 terminal_t *term = srv_to_terminal(srv);
553
554 fibril_mutex_lock(&term->mtx);
555 chargrid_set_color(term->frontbuf, bgcolor, fgcolor, attr);
556 fibril_mutex_unlock(&term->mtx);
557}
558
559static void term_set_rgb_color(con_srv_t *srv, pixel_t bgcolor,
560 pixel_t fgcolor)
561{
562 terminal_t *term = srv_to_terminal(srv);
563
564 fibril_mutex_lock(&term->mtx);
565 chargrid_set_rgb_color(term->frontbuf, bgcolor, fgcolor);
566 fibril_mutex_unlock(&term->mtx);
567}
568
569static void term_set_cursor_visibility(con_srv_t *srv, bool visible)
570{
571 terminal_t *term = srv_to_terminal(srv);
572
573 fibril_mutex_lock(&term->mtx);
574 chargrid_set_cursor_visibility(term->frontbuf, visible);
575 fibril_mutex_unlock(&term->mtx);
576
577 term_update(term);
578}
579
580static int term_get_event(con_srv_t *srv, kbd_event_t *event)
581{
582 terminal_t *term = srv_to_terminal(srv);
583 link_t *link = prodcons_consume(&term->input_pc);
584 kbd_event_t *kevent = list_get_instance(link, kbd_event_t, link);
585
586 *event = *kevent;
587 free(kevent);
588 return EOK;
589}
590
591void deinit_terminal(terminal_t *term)
592{
593 list_remove(&term->link);
594 widget_deinit(&term->widget);
595
596 if (term->frontbuf)
597 chargrid_destroy(term->frontbuf);
598
599 if (term->backbuf)
600 chargrid_destroy(term->backbuf);
601}
602
603static void terminal_destroy(widget_t *widget)
604{
605 terminal_t *term = (terminal_t *) widget;
606
607 deinit_terminal(term);
608 free(term);
609}
610
611static void terminal_reconfigure(widget_t *widget)
612{
613 /* No-op */
614}
615
616static void terminal_rearrange(widget_t *widget, sysarg_t hpos, sysarg_t vpos,
617 sysarg_t width, sysarg_t height)
618{
619 terminal_t *term = (terminal_t *) widget;
620
621 widget_modify(widget, hpos, vpos, width, height);
622 widget->width_ideal = width;
623 widget->height_ideal = height;
624
625 term_damage(term);
626}
627
628static void terminal_repaint(widget_t *widget)
629{
630 terminal_t *term = (terminal_t *) widget;
631
632 term_damage(term);
633}
634
635static void terminal_handle_keyboard_event(widget_t *widget,
636 kbd_event_t kbd_event)
637{
638 terminal_t *term = (terminal_t *) widget;
639
640 /* Got key press/release event */
641 kbd_event_t *event =
642 (kbd_event_t *) malloc(sizeof(kbd_event_t));
643 if (event == NULL)
644 return;
645
646 link_initialize(&event->link);
647 event->type = kbd_event.type;
648 event->key = kbd_event.key;
649 event->mods = kbd_event.mods;
650 event->c = kbd_event.c;
651
652 prodcons_produce(&term->input_pc, &event->link);
653}
654
655static void terminal_handle_position_event(widget_t *widget, pos_event_t event)
656{
657 /*
658 * Mouse events are ignored so far.
659 * There is no consumer for it.
660 */
661}
662
663static void term_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
664{
665 terminal_t *term = NULL;
666
667 list_foreach(terms, link) {
668 terminal_t *cur = list_get_instance(link, terminal_t, link);
669
670 if (cur->dsid == (service_id_t) IPC_GET_ARG1(*icall)) {
671 term = cur;
672 break;
673 }
674 }
675
676 if (term == NULL) {
677 async_answer_0(iid, ENOENT);
678 return;
679 }
680
681 if (atomic_postinc(&term->refcnt) == 0)
682 chargrid_set_cursor_visibility(term->frontbuf, true);
683
684 con_conn(iid, icall, &term->srvs);
685}
686
687bool init_terminal(terminal_t *term, widget_t *parent, sysarg_t width,
688 sysarg_t height)
689{
690 widget_init(&term->widget, parent);
691
692 link_initialize(&term->link);
693 fibril_mutex_initialize(&term->mtx);
694 atomic_set(&term->refcnt, 0);
695
696 prodcons_initialize(&term->input_pc);
697 term->char_remains_len = 0;
698
699 term->widget.width = width;
700 term->widget.height = height;
701 term->widget.width_ideal = width;
702 term->widget.height_ideal = height;
703
704 term->widget.destroy = terminal_destroy;
705 term->widget.reconfigure = terminal_reconfigure;
706 term->widget.rearrange = terminal_rearrange;
707 term->widget.repaint = terminal_repaint;
708 term->widget.handle_keyboard_event = terminal_handle_keyboard_event;
709 term->widget.handle_position_event = terminal_handle_position_event;
710
711 term->cols = width / FONT_WIDTH;
712 term->rows = height / FONT_SCANLINES;
713
714 term->frontbuf = NULL;
715 term->backbuf = NULL;
716
717 term->frontbuf = chargrid_create(term->cols, term->rows,
718 CHARGRID_FLAG_NONE);
719 if (!term->frontbuf) {
720 widget_deinit(&term->widget);
721 return false;
722 }
723
724 term->backbuf = chargrid_create(term->cols, term->rows,
725 CHARGRID_FLAG_NONE);
726 if (!term->backbuf) {
727 widget_deinit(&term->widget);
728 return false;
729 }
730
731 chargrid_clear(term->frontbuf);
732 chargrid_clear(term->backbuf);
733 term->top_row = 0;
734
735 async_set_client_connection(term_connection);
736 con_srvs_init(&term->srvs);
737 term->srvs.ops = &con_ops;
738 term->srvs.sarg = term;
739
740 int rc = loc_server_register(NAME);
741 if (rc != EOK) {
742 widget_deinit(&term->widget);
743 return false;
744 }
745
746 char vc[LOC_NAME_MAXLEN + 1];
747 snprintf(vc, LOC_NAME_MAXLEN, "%s/%" PRIu64, NAMESPACE,
748 task_get_id());
749
750 rc = loc_service_register(vc, &term->dsid);
751 if (rc != EOK) {
752 widget_deinit(&term->widget);
753 return false;
754 }
755
756 list_append(&term->link, &terms);
757 getterm(vc, "/app/bdsh");
758
759 return true;
760}
761
762terminal_t *create_terminal(widget_t *parent, sysarg_t width, sysarg_t height)
763{
764 terminal_t *term = (terminal_t *) malloc(sizeof(terminal_t));
765 if (!term)
766 return NULL;
767
768 bool ret = init_terminal(term, parent, width, height);
769 if (!ret) {
770 free(term);
771 return NULL;
772 }
773
774 return term;
775}
776
777/** @}
778 */
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