summaryrefslogtreecommitdiff
path: root/src/fe-text/term-terminfo.c
blob: ba1c2cbcaa1e0309c6bfd69c498e78a922237e23 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
/*
 term-terminfo.c : irssi

    Copyright (C) 2001 Timo Sirainen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "module.h"
#include "signals.h"
#include "term.h"
#include "terminfo-core.h"
#include "utf8.h"

#include <signal.h>

/* returns number of characters in the beginning of the buffer being a
   a single character, or -1 if more input is needed. The character will be
   saved in result */
typedef int (*TERM_INPUT_FUNC)(const unsigned char *buffer, int size,
			       unichar *result);

struct _TERM_WINDOW {
        /* Terminal to use for window */
	TERM_REC *term;

        /* Area for window in terminal */
	int x, y;
	int width, height;
};

TERM_WINDOW *root_window;

static char *term_lines_empty; /* 1 if line is entirely empty */
static int vcmove, vcx, vcy, curs_visible;
static int crealx, crealy, cforcemove;
static int curs_x, curs_y;

static int last_fg, last_bg, last_attrs;

static int redraw_needed, redraw_tag;
static int freeze_counter;

static TERM_INPUT_FUNC input_func;
static unsigned char term_inbuf[256];
static int term_inbuf_pos;

/* SIGCONT handler */
static void sig_cont(int p)
{
        redraw_needed = TRUE;
	terminfo_cont(current_term);
}

static int redraw_timeout(void)
{
	if (redraw_needed) {
		irssi_redraw();
                redraw_needed = FALSE;
	}

        return 1;
}

int term_init(void)
{
	struct sigaction act;
        int width, height;

	last_fg = last_bg = -1;
	last_attrs = 0;
	vcx = vcy = 0; crealx = crealy = -1;
	vcmove = FALSE; cforcemove = TRUE;
        curs_visible = TRUE;

	current_term = terminfo_core_init(stdin, stdout);
	if (current_term == NULL)
		return FALSE;

	if (term_get_size(&width, &height)) {
                current_term->width = width;
                current_term->height = height;
	}

        /* grab CONT signal */
	sigemptyset(&act.sa_mask);
	act.sa_flags = 0;
	act.sa_handler = sig_cont;
	sigaction(SIGCONT, &act, NULL);
        redraw_tag = g_timeout_add(500, (GSourceFunc) redraw_timeout, NULL);

	curs_x = curs_y = 0;
	term_width = current_term->width;
	term_height = current_term->height;
	root_window = term_window_create(0, 0, term_width, term_height);

        term_lines_empty = g_new0(char, term_height);

        term_set_input_type(TERM_TYPE_8BIT);
	term_common_init();
        g_atexit(term_deinit);
        return TRUE;
}

void term_deinit(void)
{
	if (current_term != NULL) {
		signal(SIGCONT, SIG_DFL);
		g_source_remove(redraw_tag);

		term_common_deinit();
		terminfo_core_deinit(current_term);
		current_term = NULL;
	}
}

static void term_move_real(void)
{
	if (vcx != crealx || vcy != crealy || cforcemove) {
		if (curs_visible) {
			terminfo_set_cursor_visible(FALSE);
			curs_visible = FALSE;
		}

		if (cforcemove) {
			crealx = crealy = -1;
			cforcemove = FALSE;
		}
		terminfo_move_relative(crealx, crealy, vcx, vcy);
                crealx = vcx; crealy = vcy;
	}

        vcmove = FALSE;
}

/* Cursor position is unknown - move it immediately to known position */
static void term_move_reset(int x, int y)
{
	if (x >= term_width) x = term_width-1;
	if (y >= term_height) y = term_height-1;

	vcx = x; vcy = y;
        cforcemove = TRUE;
        term_move_real();
}

/* Resize terminal - if width or height is negative,
   the new size is unknown and should be figured out somehow */
void term_resize(int width, int height)
{
	if (width < 0 || height < 0) {
		width = current_term->width;
                height = current_term->height;
	}

	if (term_width != width || term_height != height) {
		term_width = current_term->width = width;
		term_height = current_term->height = height;
		term_window_move(root_window, 0, 0, term_width, term_height);

                g_free(term_lines_empty);
		term_lines_empty = g_new0(char, term_height);
	}

        term_move_reset(0, 0);
}

void term_resize_final(int width, int height)
{
}

/* Returns TRUE if terminal has colors */
int term_has_colors(void)
{
        return current_term->TI_colors > 0;
}

/* Force the colors on any way you can */
void term_force_colors(int set)
{
	terminfo_setup_colors(current_term, set);
}

/* Clear screen */
void term_clear(void)
{
        term_set_color(root_window, ATTR_RESET);
	terminfo_clear();
        term_move_reset(0, 0);

	memset(term_lines_empty, 1, term_height);
}

/* Beep */
void term_beep(void)
{
        terminfo_beep(current_term);
}

/* Create a new window in terminal */
TERM_WINDOW *term_window_create(int x, int y, int width, int height)
{
	TERM_WINDOW *window;

	window = g_new0(TERM_WINDOW, 1);
        window->term = current_term;
	window->x = x; window->y = y;
	window->width = width; window->height = height;
        return window;
}

/* Destroy a terminal window */
void term_window_destroy(TERM_WINDOW *window)
{
        g_free(window);
}

/* Move/resize a window */
void term_window_move(TERM_WINDOW *window, int x, int y,
		      int width, int height)
{
	window->x = x;
	window->y = y;
	window->width = width;
        window->height = height;
}

/* Clear window */
void term_window_clear(TERM_WINDOW *window)
{
	int y;

        terminfo_set_normal();
        if (window->y == 0 && window->height == term_height) {
        	term_clear();
        } else {
		for (y = 0; y < window->height; y++) {
			term_move(window, 0, y);
			term_clrtoeol(window);
		}
	}
}

/* Scroll window up/down */
void term_window_scroll(TERM_WINDOW *window, int count)
{
	int y;

	terminfo_scroll(window->y, window->y+window->height-1, count);
        term_move_reset(vcx, vcy);

        /* set the newly scrolled area dirty */
	for (y = 0; y < window->height; y++)
		term_lines_empty[window->y+y] = FALSE;
}

/* Change active color */
void term_set_color(TERM_WINDOW *window, int col)
{
	int set_normal;
	int fg = col & 0x0f;
	int bg = (col & 0xf0) >> 4;

        set_normal = ((col & ATTR_RESETFG) && last_fg != -1) ||
		((col & ATTR_RESETBG) && last_bg != -1);
	if (((last_attrs & ATTR_BOLD) && (col & ATTR_BOLD) == 0) ||
	    ((last_attrs & ATTR_BLINK) && (col & ATTR_BLINK) == 0)) {
		/* we'll need to get rid of bold/blink - this can only be
		   done with setting the default color */
		set_normal = TRUE;
	}

	if (set_normal) {
		last_fg = last_bg = -1;
                last_attrs = 0;
		terminfo_set_normal();
	}

	if (!term_use_colors && (col & 0xf0) != 0)
		col |= ATTR_REVERSE;

	/* reversed text (use standout) */
	if (col & ATTR_REVERSE) {
		if ((last_attrs & ATTR_REVERSE) == 0)
			terminfo_set_standout(TRUE);
	} else if (last_attrs & ATTR_REVERSE)
		terminfo_set_standout(FALSE);

	/* set foreground color */
	if (fg != last_fg &&
	    (fg != 0 || (col & ATTR_RESETFG) == 0)) {
                if (term_use_colors) {
			last_fg = fg;
			terminfo_set_fg(last_fg);
		}
	}

	/* set background color */
	if (col & 0x80 && window->term->TI_colors == 8)
		col |= ATTR_BLINK;
	if (col & ATTR_BLINK)
		current_term->set_blink(current_term);

	if (bg != last_bg &&
	    (bg != 0 || (col & ATTR_RESETBG) == 0)) {
                if (term_use_colors) {
			last_bg = bg;
			terminfo_set_bg(last_bg);
		}
	}

	/* bold */
	if (col & 0x08 && window->term->TI_colors == 8)
		col |= ATTR_BOLD;
	if (col & ATTR_BOLD)
		terminfo_set_bold();

	/* underline */
	if (col & ATTR_UNDERLINE) {
		if ((last_attrs & ATTR_UNDERLINE) == 0)
			terminfo_set_uline(TRUE);
	} else if (last_attrs & ATTR_UNDERLINE)
		terminfo_set_uline(FALSE);

        last_attrs = col & ~0xff;
}

void term_move(TERM_WINDOW *window, int x, int y)
{
	if (x >= 0 && y >= 0) {
	vcmove = TRUE;
	vcx = x+window->x;
        vcy = y+window->y;

	if (vcx >= term_width)
		vcx = term_width-1;
	if (vcy >= term_height)
                vcy = term_height-1;
	}
}

static void term_printed_text(int count)
{
	term_lines_empty[vcy] = FALSE;

	/* if we continued writing past the line, wrap to next line.
	   However, next term_move() really shouldn't try to cache
	   the move, otherwise terminals would try to combine the
	   last word in upper line with first word in lower line. */
	vcx += count;
	while (vcx >= term_width) {
		vcx -= term_width;
		if (vcy < term_height-1) vcy++;
		if (vcx > 0) term_lines_empty[vcy] = FALSE;
	}

	crealx += count;
	if (crealx >= term_width)
		cforcemove = TRUE;
}

void term_addch(TERM_WINDOW *window, char chr)
{
	if (vcmove) term_move_real();

	/* With UTF-8, move cursor only if this char is either
	   single-byte (8. bit off) or beginning of multibyte
	   (7. bit off) */
	if (term_type != TERM_TYPE_UTF8 ||
	    (chr & 0x80) == 0 || (chr & 0x40) == 0) {
		term_printed_text(1);
	}

	putc(chr, window->term->out);
}

static void term_addch_utf8(TERM_WINDOW *window, unichar chr)
{
	char buf[10];
	int i, len;

	len = g_unichar_to_utf8(chr, buf);
	for (i = 0;  i < len; i++)
                putc(buf[i], window->term->out);
}

void term_add_unichar(TERM_WINDOW *window, unichar chr)
{
	if (vcmove) term_move_real();

	switch (term_type) {
	case TERM_TYPE_UTF8:
	  	term_printed_text(unichar_isprint(chr) ? mk_wcwidth(chr) : 1);
                term_addch_utf8(window, chr);
		break;
	case TERM_TYPE_BIG5:
		if (chr > 0xff) {
			term_printed_text(2);
			putc((chr >> 8) & 0xff, window->term->out);
		} else {
			term_printed_text(1);
		}
		putc((chr & 0xff), window->term->out);
                break;
	default:
		term_printed_text(1);
		putc(chr, window->term->out);
                break;
	}
}

void term_addstr(TERM_WINDOW *window, const char *str)
{
	int len;

	if (vcmove) term_move_real();
	len = strlen(str); /* FIXME utf8 or big5 */
        term_printed_text(len);

	fwrite(str, 1, len, window->term->out);
}

void term_clrtoeol(TERM_WINDOW *window)
{
	/* clrtoeol() doesn't necessarily understand colors */
	if (last_fg == -1 && last_bg == -1 &&
	    (last_attrs & (ATTR_UNDERLINE|ATTR_REVERSE)) == 0) {
		if (!term_lines_empty[vcy]) {
			if (vcmove) term_move_real();
			terminfo_clrtoeol();
			if (vcx == 0) term_lines_empty[vcy] = TRUE;
		}
	} else if (vcx < term_width) {
		/* we'll need to fill the line ourself. */
		if (vcmove) term_move_real();
		terminfo_repeat(' ', term_width-vcx);
		terminfo_move(vcx, vcy);
                term_lines_empty[vcy] = FALSE;
	}
}

void term_move_cursor(int x, int y)
{
	curs_x = x;
        curs_y = y;
}

void term_refresh(TERM_WINDOW *window)
{
	if (freeze_counter > 0)
		return;

	term_move(root_window, curs_x, curs_y);
	term_move_real();

	if (!curs_visible) {
		terminfo_set_cursor_visible(TRUE);
                curs_visible = TRUE;
	}

	term_set_color(window, ATTR_RESET);
	fflush(window != NULL ? window->term->out : current_term->out);
}

void term_refresh_freeze(void)
{
        freeze_counter++;
}

void term_refresh_thaw(void)
{
	if (--freeze_counter == 0)
                term_refresh(NULL);
}

void term_stop(void)
{
	terminfo_stop(current_term);
	kill(getpid(), SIGTSTP);
	terminfo_cont(current_term);
	irssi_redraw();
}

static int input_utf8(const unsigned char *buffer, int size, unichar *result)
{
	unichar c = g_utf8_get_char_validated(buffer, size);

	switch (c) {
	case (unichar)-1:
		/* not UTF8 - fallback to 8bit ascii */
		*result = *buffer;
		return 1;
	case (unichar)-2:
                /* need more data */
		return -1;
	default:
		*result = c;
		return g_utf8_skip[*buffer];
	}
}

static int input_big5(const unsigned char *buffer, int size, unichar *result)
{
	if (is_big5_hi(*buffer)) {
		/* could be */
		if (size == 1)
			return -1;

		if (is_big5_los(buffer[1]) || is_big5_lox(buffer[1])) {
                        *result = buffer[1] + ((int) *buffer << 8);
			return 2;
		}
	}

        *result = *buffer;
	return 1;
}

static int input_8bit(const unsigned char *buffer, int size, unichar *result)
{
        *result = *buffer;
        return 1;
}

void term_set_input_type(int type)
{
	switch (type) {
	case TERM_TYPE_UTF8:
                input_func = input_utf8;
                break;
	case TERM_TYPE_BIG5:
                input_func = input_big5;
		break;
	default:
                input_func = input_8bit;
	}
}

void term_gets(void)
{
	int ret, i, char_len;

        /* fread() doesn't work */

	ret = read(fileno(current_term->in),
		   term_inbuf + term_inbuf_pos, sizeof(term_inbuf)-term_inbuf_pos);
	if (ret == 0) {
		/* EOF - terminal got lost */
		ret = -1;
	} else if (ret == -1 && (errno == EINTR || errno == EAGAIN))
		ret = 0;
	if (ret == -1)
		signal_emit("command quit", 1, "Lost terminal");

	if (ret > 0) {
                /* convert input to unichars. */
		term_inbuf_pos += ret;
		for (i = 0; i < term_inbuf_pos; ) {
			unichar key;
			char_len = input_func(term_inbuf+i, term_inbuf_pos-i,
					      &key);
			if (char_len < 0)
				break;
			signal_emit("gui key pressed", 1, GINT_TO_POINTER(key));

			i += char_len;
		}

		if (i >= term_inbuf_pos)
			term_inbuf_pos = 0;
		else if (i > 0) {
			memmove(term_inbuf, term_inbuf+i, term_inbuf_pos-i);
                        term_inbuf_pos -= i;
		}
	}
}