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color.c revision 1.36
      1 /*	$NetBSD: color.c,v 1.36 2010/12/25 10:05:08 blymn Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __RCSID("$NetBSD: color.c,v 1.36 2010/12/25 10:05:08 blymn Exp $");
     35 #endif				/* not lint */
     36 
     37 #include "curses.h"
     38 #include "curses_private.h"
     39 
     40 /* Have we initialised colours? */
     41 int	__using_color = 0;
     42 
     43 /* Default colour number */
     44 attr_t	__default_color = 0;
     45 
     46 /* Default colour pair values - white on black. */
     47 struct __pair	__default_pair = {COLOR_WHITE, COLOR_BLACK, 0};
     48 
     49 /* Default colour values */
     50 /* Flags for colours and pairs */
     51 #define	__USED		0x01
     52 
     53 static void
     54 __change_pair(short);
     55 
     56 /*
     57  * has_colors --
     58  *	Check if terminal has colours.
     59  */
     60 bool
     61 has_colors(void)
     62 {
     63 	if (max_colors > 0 && max_pairs > 0 &&
     64 	    ((set_a_foreground != NULL && set_a_background != NULL) ||
     65 		initialize_pair != NULL || initialize_color != NULL ||
     66 		(set_background != NULL && set_foreground != NULL)))
     67 		return(TRUE);
     68 	else
     69 		return(FALSE);
     70 }
     71 
     72 /*
     73  * can_change_color --
     74  *	Check if terminal can change colours.
     75  */
     76 bool
     77 can_change_color(void)
     78 {
     79 	if (can_change)
     80 		return(TRUE);
     81 	else
     82 		return(FALSE);
     83 }
     84 
     85 /*
     86  * start_color --
     87  *	Initialise colour support.
     88  */
     89 int
     90 start_color(void)
     91 {
     92 	int			 i;
     93 	attr_t			 temp_nc;
     94 	struct __winlist	*wlp;
     95 	WINDOW			*win;
     96 	int			 y, x;
     97 
     98 	if (has_colors() == FALSE)
     99 		return(ERR);
    100 
    101 	/* Max colours and colour pairs */
    102 	if (max_colors == -1)
    103 		COLORS = 0;
    104 	else {
    105 		COLORS = max_colors > MAX_COLORS ? MAX_COLORS : max_colors;
    106 		if (max_pairs == -1) {
    107 			COLOR_PAIRS = 0;
    108 			COLORS = 0;
    109 		} else {
    110 			COLOR_PAIRS = (max_pairs > MAX_PAIRS - 1 ?
    111 			    MAX_PAIRS - 1 : max_pairs);
    112 			 /* Use the last colour pair for curses default. */
    113 			__default_color = COLOR_PAIR(MAX_PAIRS - 1);
    114 		}
    115 	}
    116 	if (!COLORS)
    117 		return (ERR);
    118 
    119 	_cursesi_screen->COLORS = COLORS;
    120 	_cursesi_screen->COLOR_PAIRS = COLOR_PAIRS;
    121 
    122 	/* Reset terminal colour and colour pairs. */
    123 	if (orig_colors != NULL)
    124 		tputs(orig_colors, 0, __cputchar);
    125 	if (orig_pair != NULL) {
    126 		tputs(orig_pair, 0, __cputchar);
    127 		curscr->wattr &= _cursesi_screen->mask_op;
    128 	}
    129 
    130 	/* Type of colour manipulation - ANSI/TEK/HP/other */
    131 	if (set_a_foreground != NULL && set_a_background != NULL)
    132 		_cursesi_screen->color_type = COLOR_ANSI;
    133 	else if (initialize_pair != NULL)
    134 		_cursesi_screen->color_type = COLOR_HP;
    135 	else if (initialize_color != NULL)
    136 		_cursesi_screen->color_type = COLOR_TEK;
    137 	else if (set_foreground != NULL && set_background != NULL)
    138 		_cursesi_screen->color_type = COLOR_OTHER;
    139 	else
    140 		return(ERR);		/* Unsupported colour method */
    141 
    142 #ifdef DEBUG
    143 	__CTRACE(__CTRACE_COLOR, "start_color: COLORS = %d, COLOR_PAIRS = %d",
    144 	    COLORS, COLOR_PAIRS);
    145 	switch (_cursesi_screen->color_type) {
    146 	case COLOR_ANSI:
    147 		__CTRACE(__CTRACE_COLOR, " (ANSI style)\n");
    148 		break;
    149 	case COLOR_HP:
    150 		__CTRACE(__CTRACE_COLOR, " (HP style)\n");
    151 		break;
    152 	case COLOR_TEK:
    153 		__CTRACE(__CTRACE_COLOR, " (Tektronics style)\n");
    154 		break;
    155 	case COLOR_OTHER:
    156 		__CTRACE(__CTRACE_COLOR, " (Other style)\n");
    157 		break;
    158 	}
    159 #endif
    160 
    161 	/*
    162 	 * Attributes that cannot be used with color.
    163 	 * Store these in an attr_t for wattrset()/wattron().
    164 	 */
    165 	_cursesi_screen->nca = __NORMAL;
    166 	if (no_color_video != -1) {
    167 		temp_nc = (attr_t) t_no_color_video(_cursesi_screen->term);
    168 		if (temp_nc & 0x0001)
    169 			_cursesi_screen->nca |= __STANDOUT;
    170 		if (temp_nc & 0x0002)
    171 			_cursesi_screen->nca |= __UNDERSCORE;
    172 		if (temp_nc & 0x0004)
    173 			_cursesi_screen->nca |= __REVERSE;
    174 		if (temp_nc & 0x0008)
    175 			_cursesi_screen->nca |= __BLINK;
    176 		if (temp_nc & 0x0010)
    177 			_cursesi_screen->nca |= __DIM;
    178 		if (temp_nc & 0x0020)
    179 			_cursesi_screen->nca |= __BOLD;
    180 		if (temp_nc & 0x0040)
    181 			_cursesi_screen->nca |= __BLANK;
    182 		if (temp_nc & 0x0080)
    183 			_cursesi_screen->nca |= __PROTECT;
    184 		if (temp_nc & 0x0100)
    185 			_cursesi_screen->nca |= __ALTCHARSET;
    186 	}
    187 #ifdef DEBUG
    188 	__CTRACE(__CTRACE_COLOR, "start_color: _cursesi_screen->nca = %08x\n",
    189 	    _cursesi_screen->nca);
    190 #endif
    191 
    192 	/* Set up initial 8 colours */
    193 	if (COLORS >= COLOR_BLACK)
    194 		(void) init_color(COLOR_BLACK, 0, 0, 0);
    195 	if (COLORS >= COLOR_RED)
    196 		(void) init_color(COLOR_RED, 1000, 0, 0);
    197 	if (COLORS >= COLOR_GREEN)
    198 		(void) init_color(COLOR_GREEN, 0, 1000, 0);
    199 	if (COLORS >= COLOR_YELLOW)
    200 		(void) init_color(COLOR_YELLOW, 1000, 1000, 0);
    201 	if (COLORS >= COLOR_BLUE)
    202 		(void) init_color(COLOR_BLUE, 0, 0, 1000);
    203 	if (COLORS >= COLOR_MAGENTA)
    204 		(void) init_color(COLOR_MAGENTA, 1000, 0, 1000);
    205 	if (COLORS >= COLOR_CYAN)
    206 		(void) init_color(COLOR_CYAN, 0, 1000, 1000);
    207 	if (COLORS >= COLOR_WHITE)
    208 		(void) init_color(COLOR_WHITE, 1000, 1000, 1000);
    209 
    210 	/* Initialise other colours */
    211 	for (i = 8; i < COLORS; i++) {
    212 		_cursesi_screen->colours[i].red = 0;
    213 		_cursesi_screen->colours[i].green = 0;
    214 		_cursesi_screen->colours[i].blue = 0;
    215 		_cursesi_screen->colours[i].flags = 0;
    216 	}
    217 
    218 	/* Initialise pair 0 to default colours. */
    219 	_cursesi_screen->colour_pairs[0].fore = -1;
    220 	_cursesi_screen->colour_pairs[0].back = -1;
    221 	_cursesi_screen->colour_pairs[0].flags = 0;
    222 
    223 	/* Initialise user colour pairs to default (white on black) */
    224 	for (i = 0; i < COLOR_PAIRS; i++) {
    225 		_cursesi_screen->colour_pairs[i].fore = COLOR_WHITE;
    226 		_cursesi_screen->colour_pairs[i].back = COLOR_BLACK;
    227 		_cursesi_screen->colour_pairs[i].flags = 0;
    228 	}
    229 
    230 	/* Initialise default colour pair. */
    231 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore =
    232 	    __default_pair.fore;
    233 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back =
    234 	    __default_pair.back;
    235 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags =
    236 	    __default_pair.flags;
    237 
    238 	__using_color = 1;
    239 
    240 	/* Set all positions on all windows to curses default colours. */
    241 	for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
    242 		win = wlp->winp;
    243 		if (wlp->winp != __virtscr && wlp->winp != curscr) {
    244 			/* Set color attribute on other windows */
    245 			win->battr |= __default_color;
    246 			for (y = 0; y < win->maxy; y++) {
    247 				for (x = 0; x < win->maxx; x++) {
    248 					win->alines[y]->line[x].attr &= ~__COLOR;
    249 					win->alines[y]->line[x].attr |= __default_color;
    250 				}
    251 			}
    252 			__touchwin(win);
    253 		}
    254 	}
    255 
    256 	return(OK);
    257 }
    258 
    259 /*
    260  * init_pair --
    261  *	Set pair foreground and background colors.
    262  *	Our default colour ordering is ANSI - 1 = red, 4 = blue, 3 = yellow,
    263  *	6 = cyan.  The older style (Sb/Sf) uses 1 = blue, 4 = red, 3 = cyan,
    264  *	6 = yellow, so we swap them here and in pair_content().
    265  */
    266 int
    267 init_pair(short pair, short fore, short back)
    268 {
    269 	int	changed;
    270 
    271 #ifdef DEBUG
    272 	__CTRACE(__CTRACE_COLOR, "init_pair: %d, %d, %d\n", pair, fore, back);
    273 #endif
    274 
    275 	if (pair < 0 || pair >= COLOR_PAIRS)
    276 		return (ERR);
    277 
    278 	if (pair == 0) /* Ignore request for pair 0, it is default. */
    279 		return OK;
    280 
    281 	if (fore >= COLORS)
    282 		return (ERR);
    283 	if (back >= COLORS)
    284 		return (ERR);
    285 
    286 	/* Swap red/blue and yellow/cyan */
    287 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    288 		switch (fore) {
    289 		case COLOR_RED:
    290 			fore = COLOR_BLUE;
    291 			break;
    292 		case COLOR_BLUE:
    293 			fore = COLOR_RED;
    294 			break;
    295 		case COLOR_YELLOW:
    296 			fore = COLOR_CYAN;
    297 			break;
    298 		case COLOR_CYAN:
    299 			fore = COLOR_YELLOW;
    300 			break;
    301 		}
    302 		switch (back) {
    303 		case COLOR_RED:
    304 			back = COLOR_BLUE;
    305 			break;
    306 		case COLOR_BLUE:
    307 			back = COLOR_RED;
    308 			break;
    309 		case COLOR_YELLOW:
    310 			back = COLOR_CYAN;
    311 			break;
    312 		case COLOR_CYAN:
    313 			back = COLOR_YELLOW;
    314 			break;
    315 		}
    316 	}
    317 
    318 	if ((_cursesi_screen->colour_pairs[pair].flags & __USED) &&
    319 	    (fore != _cursesi_screen->colour_pairs[pair].fore ||
    320 	     back != _cursesi_screen->colour_pairs[pair].back))
    321 		changed = 1;
    322 	else
    323 		changed = 0;
    324 
    325 	_cursesi_screen->colour_pairs[pair].flags |= __USED;
    326 	_cursesi_screen->colour_pairs[pair].fore = fore;
    327 	_cursesi_screen->colour_pairs[pair].back = back;
    328 
    329 	/* XXX: need to initialise HP style (Ip) */
    330 
    331 	if (changed)
    332 		__change_pair(pair);
    333 	return (OK);
    334 }
    335 
    336 /*
    337  * pair_content --
    338  *	Get pair foreground and background colours.
    339  */
    340 int
    341 pair_content(short pair, short *forep, short *backp)
    342 {
    343 	if (pair < 0 || pair > _cursesi_screen->COLOR_PAIRS)
    344 		return(ERR);
    345 
    346 	*forep = _cursesi_screen->colour_pairs[pair].fore;
    347 	*backp = _cursesi_screen->colour_pairs[pair].back;
    348 
    349 	/* Swap red/blue and yellow/cyan */
    350 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    351 		switch (*forep) {
    352 		case COLOR_RED:
    353 			*forep = COLOR_BLUE;
    354 			break;
    355 		case COLOR_BLUE:
    356 			*forep = COLOR_RED;
    357 			break;
    358 		case COLOR_YELLOW:
    359 			*forep = COLOR_CYAN;
    360 			break;
    361 		case COLOR_CYAN:
    362 			*forep = COLOR_YELLOW;
    363 			break;
    364 		}
    365 		switch (*backp) {
    366 		case COLOR_RED:
    367 			*backp = COLOR_BLUE;
    368 			break;
    369 		case COLOR_BLUE:
    370 			*backp = COLOR_RED;
    371 			break;
    372 		case COLOR_YELLOW:
    373 			*backp = COLOR_CYAN;
    374 			break;
    375 		case COLOR_CYAN:
    376 			*backp = COLOR_YELLOW;
    377 			break;
    378 		}
    379 	}
    380 	return(OK);
    381 }
    382 
    383 /*
    384  * init_color --
    385  *	Set colour red, green and blue values.
    386  */
    387 int
    388 init_color(short color, short red, short green, short blue)
    389 {
    390 #ifdef DEBUG
    391 	__CTRACE(__CTRACE_COLOR, "init_color: %d, %d, %d, %d\n",
    392 	    color, red, green, blue);
    393 #endif
    394 	if (color < 0 || color >= _cursesi_screen->COLORS)
    395 		return(ERR);
    396 
    397 	_cursesi_screen->colours[color].red = red;
    398 	_cursesi_screen->colours[color].green = green;
    399 	_cursesi_screen->colours[color].blue = blue;
    400 	/* XXX Not yet implemented */
    401 	return(ERR);
    402 	/* XXX: need to initialise Tek style (Ic) and support HLS */
    403 }
    404 
    405 /*
    406  * color_content --
    407  *	Get colour red, green and blue values.
    408  */
    409 int
    410 color_content(short color, short *redp, short *greenp, short *bluep)
    411 {
    412 	if (color < 0 || color >= _cursesi_screen->COLORS)
    413 		return(ERR);
    414 
    415 	*redp = _cursesi_screen->colours[color].red;
    416 	*greenp = _cursesi_screen->colours[color].green;
    417 	*bluep = _cursesi_screen->colours[color].blue;
    418 	return(OK);
    419 }
    420 
    421 /*
    422  * use_default_colors --
    423  *	Use terminal default colours instead of curses default colour.
    424   */
    425 int
    426 use_default_colors()
    427 {
    428 #ifdef DEBUG
    429 	__CTRACE(__CTRACE_COLOR, "use_default_colors\n");
    430 #endif
    431 
    432 	return(assume_default_colors(-1, -1));
    433 }
    434 
    435 /*
    436  * assume_default_colors --
    437  *	Set the default foreground and background colours.
    438  */
    439 int
    440 assume_default_colors(short arg_fore, short arg_back)
    441 {
    442 	short fore, back;
    443 
    444 	fore = arg_fore;
    445 	back = arg_back;
    446 
    447 #ifdef DEBUG
    448 	__CTRACE(__CTRACE_COLOR, "assume_default_colors: %d, %d\n",
    449 	    fore, back);
    450 	__CTRACE(__CTRACE_COLOR, "assume_default_colors: default_colour = %d, pair_number = %d\n", __default_color, PAIR_NUMBER(__default_color));
    451 #endif
    452 
    453 	if (arg_fore == -1)
    454 		fore = COLOR_WHITE;
    455 	if (arg_back == -1)
    456 		back = COLOR_BLACK;
    457 
    458 	/* Swap red/blue and yellow/cyan */
    459 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    460 		switch (fore) {
    461 		case COLOR_RED:
    462 			fore = COLOR_BLUE;
    463 			break;
    464 		case COLOR_BLUE:
    465 			fore = COLOR_RED;
    466 			break;
    467 		case COLOR_YELLOW:
    468 			fore = COLOR_CYAN;
    469 			break;
    470 		case COLOR_CYAN:
    471 			fore = COLOR_YELLOW;
    472 			break;
    473 		}
    474 		switch (back) {
    475 		case COLOR_RED:
    476 			back = COLOR_BLUE;
    477 			break;
    478 		case COLOR_BLUE:
    479 			back = COLOR_RED;
    480 			break;
    481 		case COLOR_YELLOW:
    482 			back = COLOR_CYAN;
    483 			break;
    484 		case COLOR_CYAN:
    485 			back = COLOR_YELLOW;
    486 			break;
    487 		}
    488 	}
    489 	__default_pair.fore = fore;
    490 	__default_pair.back = back;
    491 	__default_pair.flags = __USED;
    492 
    493 	if (COLOR_PAIRS) {
    494 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore = fore;
    495 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back = back;
    496 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags = __USED;
    497 	}
    498 
    499 	/*
    500 	 * If we've already called start_color(), make sure all instances
    501 	 * of the curses default colour pair are dirty.
    502 	 */
    503 	if (__using_color)
    504 		__change_pair(PAIR_NUMBER(__default_color));
    505 
    506 	return(OK);
    507 }
    508 
    509 /* no_color_video is a terminfo macro, but we need to retain binary compat */
    510 #ifdef __strong_alias
    511 #undef no_color_video
    512 __strong_alias(no_color_video, no_color_attributes)
    513 #endif
    514 /*
    515  * no_color_attributes --
    516  *	Return attributes that cannot be combined with color.
    517  */
    518 attr_t
    519 no_color_attributes(void)
    520 {
    521 	return(_cursesi_screen->nca);
    522 }
    523 
    524 /*
    525  * __set_color --
    526  *	Set terminal foreground and background colours.
    527  */
    528 void
    529 __set_color( /*ARGSUSED*/ WINDOW *win, attr_t attr)
    530 {
    531 	short	pair;
    532 
    533 	if ((curscr->wattr & __COLOR) == (attr & __COLOR))
    534 		return;
    535 
    536 	pair = PAIR_NUMBER((u_int32_t)attr);
    537 #ifdef DEBUG
    538 	__CTRACE(__CTRACE_COLOR, "__set_color: %d, %d, %d\n", pair,
    539 		 _cursesi_screen->colour_pairs[pair].fore,
    540 		 _cursesi_screen->colour_pairs[pair].back);
    541 #endif
    542 	switch (_cursesi_screen->color_type) {
    543 	/* Set ANSI forground and background colours */
    544 	case COLOR_ANSI:
    545 		if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
    546 		    _cursesi_screen->colour_pairs[pair].back < 0)
    547 			__unset_color(curscr);
    548 		if (_cursesi_screen->colour_pairs[pair].fore >= 0)
    549 			tputs(vtparm(t_set_a_foreground(_cursesi_screen->term),
    550 			    _cursesi_screen->colour_pairs[pair].fore),
    551 			    0, __cputchar);
    552 		if (_cursesi_screen->colour_pairs[pair].back >= 0)
    553 			tputs(vtparm(t_set_a_background(_cursesi_screen->term),
    554 			    _cursesi_screen->colour_pairs[pair].back),
    555 			    0, __cputchar);
    556 		break;
    557 	case COLOR_HP:
    558 		/* XXX: need to support HP style */
    559 		break;
    560 	case COLOR_TEK:
    561 		/* XXX: need to support Tek style */
    562 		break;
    563 	case COLOR_OTHER:
    564 		if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
    565 		    _cursesi_screen->colour_pairs[pair].back < 0)
    566 			__unset_color(curscr);
    567 		if (_cursesi_screen->colour_pairs[pair].fore >= 0)
    568 			tputs(vtparm(t_set_foreground(_cursesi_screen->term),
    569 			    _cursesi_screen->colour_pairs[pair].fore),
    570 			    0, __cputchar);
    571 		if (_cursesi_screen->colour_pairs[pair].back >= 0)
    572 			tputs(vtparm(t_set_background(_cursesi_screen->term),
    573 			    _cursesi_screen->colour_pairs[pair].back),
    574 			    0, __cputchar);
    575 		break;
    576 	}
    577 	curscr->wattr &= ~__COLOR;
    578 	curscr->wattr |= attr & __COLOR;
    579 }
    580 
    581 /*
    582  * __unset_color --
    583  *	Clear terminal foreground and background colours.
    584  */
    585 void
    586 __unset_color(WINDOW *win)
    587 {
    588 #ifdef DEBUG
    589 	__CTRACE(__CTRACE_COLOR, "__unset_color\n");
    590 #endif
    591 	switch (_cursesi_screen->color_type) {
    592 	/* Clear ANSI forground and background colours */
    593 	case COLOR_ANSI:
    594 		if (orig_pair != NULL) {
    595 			tputs(orig_pair, 0, __cputchar);
    596 			win->wattr &= __mask_op;
    597 		}
    598 		break;
    599 	case COLOR_HP:
    600 		/* XXX: need to support HP style */
    601 		break;
    602 	case COLOR_TEK:
    603 		/* XXX: need to support Tek style */
    604 		break;
    605 	case COLOR_OTHER:
    606 		if (orig_pair != NULL) {
    607 			tputs(orig_pair, 0, __cputchar);
    608 			win->wattr &= __mask_op;
    609 		}
    610 		break;
    611 	}
    612 }
    613 
    614 /*
    615  * __restore_colors --
    616  *	Redo color definitions after restarting 'curses' mode.
    617  */
    618 void
    619 __restore_colors(void)
    620 {
    621 	if (can_change != 0)
    622 		switch (_cursesi_screen->color_type) {
    623 		case COLOR_HP:
    624 			/* XXX: need to re-initialise HP style (Ip) */
    625 			break;
    626 		case COLOR_TEK:
    627 			/* XXX: need to re-initialise Tek style (Ic) */
    628 			break;
    629 		}
    630 }
    631 
    632 /*
    633  * __change_pair --
    634  *	Mark dirty all positions using pair.
    635  */
    636 void
    637 __change_pair(short pair)
    638 {
    639 	struct __winlist	*wlp;
    640 	WINDOW			*win;
    641 	int			 y, x;
    642 	__LINE			*lp;
    643 	uint32_t		cl = COLOR_PAIR(pair);
    644 
    645 
    646 	for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
    647 #ifdef DEBUG
    648 		__CTRACE(__CTRACE_COLOR, "__change_pair: win = %p\n",
    649 		    wlp->winp);
    650 #endif
    651 		win = wlp->winp;
    652 		if (win == __virtscr)
    653 			continue;
    654 		else if (win == curscr) {
    655 			/* Reset colour attribute on curscr */
    656 #ifdef DEBUG
    657 			__CTRACE(__CTRACE_COLOR,
    658 			    "__change_pair: win == curscr\n");
    659 #endif
    660 			for (y = 0; y < curscr->maxy; y++) {
    661 				lp = curscr->alines[y];
    662 				for (x = 0; x < curscr->maxx; x++) {
    663 					if ((lp->line[x].attr & __COLOR) == cl)
    664 						lp->line[x].attr &= ~__COLOR;
    665 				}
    666 			}
    667 		} else {
    668 			/* Mark dirty those positions with colour pair "pair" */
    669 			for (y = 0; y < win->maxy; y++) {
    670 				lp = win->alines[y];
    671 				for (x = 0; x < win->maxx; x++)
    672 					if ((lp->line[x].attr &
    673 					    __COLOR) == cl) {
    674 						if (!(lp->flags & __ISDIRTY))
    675 							lp->flags |= __ISDIRTY;
    676 						/*
    677 					 	* firstchp/lastchp are shared
    678 					 	* between parent window and
    679 					 	* sub-window.
    680 					 	*/
    681 						if (*lp->firstchp > x)
    682 						*lp->firstchp = x;
    683 						if (*lp->lastchp < x)
    684 							*lp->lastchp = x;
    685 					}
    686 #ifdef DEBUG
    687 				if ((win->alines[y]->flags & __ISDIRTY))
    688 					__CTRACE(__CTRACE_COLOR,
    689 					    "__change_pair: first = %d, "
    690 					    "last = %d\n",
    691 					    *win->alines[y]->firstchp,
    692 					    *win->alines[y]->lastchp);
    693 #endif
    694 			}
    695 		}
    696 	}
    697 }
    698