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color.c revision 1.47
      1 /*	$NetBSD: color.c,v 1.47 2022/10/19 06:09:27 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 1.47 2022/10/19 06:09:27 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 int	__do_color_init = 0; /* force refresh to init color in all cells */
     43 
     44 /* Default colour number */
     45 attr_t	__default_color = 0;
     46 
     47 /* Default colour pair values - white on black. */
     48 struct __pair	__default_pair = {COLOR_WHITE, COLOR_BLACK, 0};
     49 
     50 /* Default colour values */
     51 /* Flags for colours and pairs */
     52 #define	__USED		0x01
     53 
     54 static void
     55 __change_pair(short);
     56 
     57 static int
     58 init_color_value(short, short, short, short);
     59 
     60 /*
     61  * has_colors --
     62  *	Check if terminal has colours.
     63  */
     64 bool
     65 has_colors(void)
     66 {
     67 	if (max_colors > 0 && max_pairs > 0 &&
     68 	    ((set_a_foreground != NULL && set_a_background != NULL) ||
     69 		initialize_pair != NULL || initialize_color != NULL ||
     70 		(set_background != NULL && set_foreground != NULL)))
     71 		return true;
     72 	else
     73 		return false;
     74 }
     75 
     76 /*
     77  * can_change_color --
     78  *	Check if terminal can change colours.
     79  */
     80 bool
     81 can_change_color(void)
     82 {
     83 	return can_change ? true : false;
     84 }
     85 
     86 /*
     87  * start_color --
     88  *	Initialise colour support.
     89  */
     90 int
     91 start_color(void)
     92 {
     93 	int			 i;
     94 	attr_t			 temp_nc;
     95 	struct __winlist	*wlp;
     96 	WINDOW			*win;
     97 	int			 y, x;
     98 
     99 	if (has_colors() == FALSE)
    100 		return ERR;
    101 
    102 	/* Max colours and colour pairs */
    103 	if (max_colors == -1)
    104 		COLORS = 0;
    105 	else {
    106 		COLORS = max_colors > MAX_COLORS ? MAX_COLORS : max_colors;
    107 		if (max_pairs == -1) {
    108 			COLOR_PAIRS = 0;
    109 			COLORS = 0;
    110 		} else {
    111 			COLOR_PAIRS = (max_pairs > MAX_PAIRS - 1 ?
    112 			    MAX_PAIRS - 1 : max_pairs);
    113 			 /* Use the last colour pair for curses default. */
    114 #ifdef __OLD_DEFAULT_COLOR
    115 			__default_color = COLOR_PAIR(MAX_PAIRS - 1);
    116 #else
    117 			__default_color = COLOR_PAIR(0);
    118 #endif
    119 		}
    120 	}
    121 	if (!COLORS)
    122 		return ERR;
    123 
    124 	_cursesi_screen->COLORS = COLORS;
    125 	_cursesi_screen->COLOR_PAIRS = COLOR_PAIRS;
    126 
    127 	/* Reset terminal colour and colour pairs. */
    128 	if (orig_colors != NULL)
    129 		tputs(orig_colors, 0, __cputchar);
    130 	if (orig_pair != NULL) {
    131 		tputs(orig_pair, 0, __cputchar);
    132 		curscr->wattr &= _cursesi_screen->mask_op;
    133 	}
    134 
    135 	/* Type of colour manipulation - ANSI/TEK/HP/other */
    136 	if (set_a_foreground != NULL && set_a_background != NULL)
    137 		_cursesi_screen->color_type = COLOR_ANSI;
    138 	else if (initialize_pair != NULL)
    139 		_cursesi_screen->color_type = COLOR_HP;
    140 	else if (initialize_color != NULL)
    141 		_cursesi_screen->color_type = COLOR_TEK;
    142 	else if (set_foreground != NULL && set_background != NULL)
    143 		_cursesi_screen->color_type = COLOR_OTHER;
    144 	else
    145 		return(ERR);		/* Unsupported colour method */
    146 
    147 #ifdef DEBUG
    148 	__CTRACE(__CTRACE_COLOR, "start_color: COLORS = %d, COLOR_PAIRS = %d",
    149 	    COLORS, COLOR_PAIRS);
    150 	switch (_cursesi_screen->color_type) {
    151 	case COLOR_ANSI:
    152 		__CTRACE(__CTRACE_COLOR, " (ANSI style)\n");
    153 		break;
    154 	case COLOR_HP:
    155 		__CTRACE(__CTRACE_COLOR, " (HP style)\n");
    156 		break;
    157 	case COLOR_TEK:
    158 		__CTRACE(__CTRACE_COLOR, " (Tektronics style)\n");
    159 		break;
    160 	case COLOR_OTHER:
    161 		__CTRACE(__CTRACE_COLOR, " (Other style)\n");
    162 		break;
    163 	}
    164 #endif
    165 
    166 	/*
    167 	 * Attributes that cannot be used with color.
    168 	 * Store these in an attr_t for wattrset()/wattron().
    169 	 */
    170 	_cursesi_screen->nca = __NORMAL;
    171 	if (no_color_video != -1) {
    172 		temp_nc = (attr_t)t_no_color_video(_cursesi_screen->term);
    173 		if (temp_nc & 0x0001)
    174 			_cursesi_screen->nca |= __STANDOUT;
    175 		if (temp_nc & 0x0002)
    176 			_cursesi_screen->nca |= __UNDERSCORE;
    177 		if (temp_nc & 0x0004)
    178 			_cursesi_screen->nca |= __REVERSE;
    179 		if (temp_nc & 0x0008)
    180 			_cursesi_screen->nca |= __BLINK;
    181 		if (temp_nc & 0x0010)
    182 			_cursesi_screen->nca |= __DIM;
    183 		if (temp_nc & 0x0020)
    184 			_cursesi_screen->nca |= __BOLD;
    185 		if (temp_nc & 0x0040)
    186 			_cursesi_screen->nca |= __BLANK;
    187 		if (temp_nc & 0x0080)
    188 			_cursesi_screen->nca |= __PROTECT;
    189 		if (temp_nc & 0x0100)
    190 			_cursesi_screen->nca |= __ALTCHARSET;
    191 	}
    192 	__CTRACE(__CTRACE_COLOR, "start_color: _cursesi_screen->nca = %08x\n",
    193 	    _cursesi_screen->nca);
    194 
    195 	/* Set up initial 8 colours */
    196 #define	RGB_ON	680	/* Allow for bright colours */
    197 	if (COLORS >= COLOR_BLACK)
    198 		(void)init_color_value(COLOR_BLACK, 0, 0, 0);
    199 	if (COLORS >= COLOR_RED)
    200 		(void)init_color_value(COLOR_RED, RGB_ON, 0, 0);
    201 	if (COLORS >= COLOR_GREEN)
    202 		(void)init_color_value(COLOR_GREEN, 0, RGB_ON, 0);
    203 	if (COLORS >= COLOR_YELLOW)
    204 		(void)init_color_value(COLOR_YELLOW, RGB_ON, RGB_ON, 0);
    205 	if (COLORS >= COLOR_BLUE)
    206 		(void)init_color_value(COLOR_BLUE, 0, 0, RGB_ON);
    207 	if (COLORS >= COLOR_MAGENTA)
    208 		(void)init_color_value(COLOR_MAGENTA, RGB_ON, 0, RGB_ON);
    209 	if (COLORS >= COLOR_CYAN)
    210 		(void)init_color_value(COLOR_CYAN, 0, RGB_ON, RGB_ON);
    211 	if (COLORS >= COLOR_WHITE)
    212 		(void)init_color_value(COLOR_WHITE, RGB_ON, RGB_ON, RGB_ON);
    213 
    214 	/* Initialise other colours */
    215 	for (i = 8; i < COLORS; i++) {
    216 		_cursesi_screen->colours[i].red = 0;
    217 		_cursesi_screen->colours[i].green = 0;
    218 		_cursesi_screen->colours[i].blue = 0;
    219 		_cursesi_screen->colours[i].flags = 0;
    220 	}
    221 
    222 	/* Initialise pair 0 to default colours. */
    223 	_cursesi_screen->colour_pairs[0].fore = -1;
    224 	_cursesi_screen->colour_pairs[0].back = -1;
    225 	_cursesi_screen->colour_pairs[0].flags = 0;
    226 
    227 	/* Initialise user colour pairs to default (white on black) */
    228 	for (i = 0; i < COLOR_PAIRS; i++) {
    229 		_cursesi_screen->colour_pairs[i].fore = COLOR_WHITE;
    230 		_cursesi_screen->colour_pairs[i].back = COLOR_BLACK;
    231 		_cursesi_screen->colour_pairs[i].flags = 0;
    232 	}
    233 
    234 	/* Initialise default colour pair. */
    235 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore =
    236 	    __default_pair.fore;
    237 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back =
    238 	    __default_pair.back;
    239 	_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags =
    240 	    __default_pair.flags;
    241 
    242 	__using_color = 1;
    243 	__do_color_init = 1;
    244 
    245 	/* Set all positions on all windows to curses default colours. */
    246 	for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
    247 		win = wlp->winp;
    248 		if (wlp->winp != __virtscr && wlp->winp != curscr) {
    249 			/* Set color attribute on other windows */
    250 			win->battr |= __default_color;
    251 			for (y = 0; y < win->maxy; y++) {
    252 				win->alines[y]->flags |= __ISFORCED;
    253 				for (x = 0; x < win->maxx; x++) {
    254 					win->alines[y]->line[x].attr &= ~__COLOR;
    255 					win->alines[y]->line[x].attr |= __default_color;
    256 				}
    257 			}
    258 			__touchwin(win, 0);
    259 		}
    260 	}
    261 
    262 	return(OK);
    263 }
    264 
    265 /*
    266  * init_pair --
    267  *	Set pair foreground and background colors.
    268  *	Our default colour ordering is ANSI - 1 = red, 4 = blue, 3 = yellow,
    269  *	6 = cyan.  The older style (Sb/Sf) uses 1 = blue, 4 = red, 3 = cyan,
    270  *	6 = yellow, so we swap them here and in pair_content().
    271  */
    272 int
    273 init_pair(short pair, short fore, short back)
    274 {
    275 	int	changed;
    276 
    277 	__CTRACE(__CTRACE_COLOR, "init_pair: %d, %d, %d\n", pair, fore, back);
    278 
    279 	if (pair < 0 || pair >= COLOR_PAIRS)
    280 		return ERR;
    281 
    282 	if (pair == 0) /* Ignore request for pair 0, it is default. */
    283 		return OK;
    284 
    285 	if (fore >= COLORS)
    286 		return ERR;
    287 	if (back >= COLORS)
    288 		return ERR;
    289 
    290 	/* Swap red/blue and yellow/cyan */
    291 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    292 		switch (fore) {
    293 		case COLOR_RED:
    294 			fore = COLOR_BLUE;
    295 			break;
    296 		case COLOR_BLUE:
    297 			fore = COLOR_RED;
    298 			break;
    299 		case COLOR_YELLOW:
    300 			fore = COLOR_CYAN;
    301 			break;
    302 		case COLOR_CYAN:
    303 			fore = COLOR_YELLOW;
    304 			break;
    305 		}
    306 		switch (back) {
    307 		case COLOR_RED:
    308 			back = COLOR_BLUE;
    309 			break;
    310 		case COLOR_BLUE:
    311 			back = COLOR_RED;
    312 			break;
    313 		case COLOR_YELLOW:
    314 			back = COLOR_CYAN;
    315 			break;
    316 		case COLOR_CYAN:
    317 			back = COLOR_YELLOW;
    318 			break;
    319 		}
    320 	}
    321 
    322 	if ((_cursesi_screen->colour_pairs[pair].flags & __USED) &&
    323 	    (fore != _cursesi_screen->colour_pairs[pair].fore ||
    324 	     back != _cursesi_screen->colour_pairs[pair].back))
    325 		changed = 1;
    326 	else
    327 		changed = 0;
    328 
    329 	_cursesi_screen->colour_pairs[pair].flags |= __USED;
    330 	_cursesi_screen->colour_pairs[pair].fore = fore;
    331 	_cursesi_screen->colour_pairs[pair].back = back;
    332 
    333 	/* XXX: need to initialise HP style (Ip) */
    334 
    335 	if (changed)
    336 		__change_pair(pair);
    337 	return OK;
    338 }
    339 
    340 /*
    341  * pair_content --
    342  *	Get pair foreground and background colours.
    343  */
    344 int
    345 pair_content(short pair, short *forep, short *backp)
    346 {
    347 	if (pair < 0 || pair > _cursesi_screen->COLOR_PAIRS)
    348 		return ERR;
    349 
    350 	*forep = _cursesi_screen->colour_pairs[pair].fore;
    351 	*backp = _cursesi_screen->colour_pairs[pair].back;
    352 
    353 	/* Swap red/blue and yellow/cyan */
    354 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    355 		switch (*forep) {
    356 		case COLOR_RED:
    357 			*forep = COLOR_BLUE;
    358 			break;
    359 		case COLOR_BLUE:
    360 			*forep = COLOR_RED;
    361 			break;
    362 		case COLOR_YELLOW:
    363 			*forep = COLOR_CYAN;
    364 			break;
    365 		case COLOR_CYAN:
    366 			*forep = COLOR_YELLOW;
    367 			break;
    368 		}
    369 		switch (*backp) {
    370 		case COLOR_RED:
    371 			*backp = COLOR_BLUE;
    372 			break;
    373 		case COLOR_BLUE:
    374 			*backp = COLOR_RED;
    375 			break;
    376 		case COLOR_YELLOW:
    377 			*backp = COLOR_CYAN;
    378 			break;
    379 		case COLOR_CYAN:
    380 			*backp = COLOR_YELLOW;
    381 			break;
    382 		}
    383 	}
    384 	return OK;
    385 }
    386 
    387 /*
    388  * init_color_Value --
    389  *	Set colour red, green and blue values.
    390  */
    391 static int
    392 init_color_value(short color, short red, short green, short blue)
    393 {
    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 	return OK;
    401 }
    402 
    403 /*
    404  * init_color --
    405  *	Set colour red, green and blue values.
    406  *	Change color on screen.
    407  */
    408 int
    409 init_color(short color, short red, short green, short blue)
    410 {
    411 	__CTRACE(__CTRACE_COLOR, "init_color: %d, %d, %d, %d\n",
    412 	    color, red, green, blue);
    413 	if (init_color_value(color, red, green, blue) == ERR)
    414 		return ERR;
    415 	if (!can_change || t_initialize_color(_cursesi_screen->term) == NULL)
    416 		return ERR;
    417 	tputs(tiparm(t_initialize_color(_cursesi_screen->term),
    418 	             color, red, green, blue), 0, __cputchar);
    419 	return OK;
    420 }
    421 
    422 /*
    423  * color_content --
    424  *	Get colour red, green and blue values.
    425  */
    426 int
    427 color_content(short color, short *redp, short *greenp, short *bluep)
    428 {
    429 	if (color < 0 || color >= _cursesi_screen->COLORS)
    430 		return ERR;
    431 
    432 	*redp = _cursesi_screen->colours[color].red;
    433 	*greenp = _cursesi_screen->colours[color].green;
    434 	*bluep = _cursesi_screen->colours[color].blue;
    435 	return OK;
    436 }
    437 
    438 /*
    439  * use_default_colors --
    440  *	Use terminal default colours instead of curses default colour.
    441   */
    442 int
    443 use_default_colors(void)
    444 {
    445 	__CTRACE(__CTRACE_COLOR, "use_default_colors\n");
    446 
    447 	return (assume_default_colors(-1, -1));
    448 }
    449 
    450 /*
    451  * assume_default_colors --
    452  *	Set the default foreground and background colours.
    453  */
    454 int
    455 assume_default_colors(short fore, short back)
    456 {
    457 	__CTRACE(__CTRACE_COLOR, "assume_default_colors: %d, %d\n",
    458 	    fore, back);
    459 	__CTRACE(__CTRACE_COLOR,
    460 	    "assume_default_colors: default_colour = %d, pair_number = %d\n",
    461 	    __default_color, PAIR_NUMBER(__default_color));
    462 
    463 	/* Swap red/blue and yellow/cyan */
    464 	if (_cursesi_screen->color_type == COLOR_OTHER) {
    465 		switch (fore) {
    466 		case COLOR_RED:
    467 			fore = COLOR_BLUE;
    468 			break;
    469 		case COLOR_BLUE:
    470 			fore = COLOR_RED;
    471 			break;
    472 		case COLOR_YELLOW:
    473 			fore = COLOR_CYAN;
    474 			break;
    475 		case COLOR_CYAN:
    476 			fore = COLOR_YELLOW;
    477 			break;
    478 		}
    479 		switch (back) {
    480 		case COLOR_RED:
    481 			back = COLOR_BLUE;
    482 			break;
    483 		case COLOR_BLUE:
    484 			back = COLOR_RED;
    485 			break;
    486 		case COLOR_YELLOW:
    487 			back = COLOR_CYAN;
    488 			break;
    489 		case COLOR_CYAN:
    490 			back = COLOR_YELLOW;
    491 			break;
    492 		}
    493 	}
    494 	__default_pair.fore = fore;
    495 	__default_pair.back = back;
    496 	__default_pair.flags = __USED;
    497 
    498 	if (COLOR_PAIRS) {
    499 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore = fore;
    500 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back = back;
    501 		_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags = __USED;
    502 	}
    503 
    504 	/*
    505 	 * If we've already called start_color(), make sure all instances
    506 	 * of the curses default colour pair are dirty.
    507 	 */
    508 	if (__using_color)
    509 		__change_pair(PAIR_NUMBER(__default_color));
    510 
    511 	return(OK);
    512 }
    513 
    514 /* no_color_video is a terminfo macro, but we need to retain binary compat */
    515 #ifdef __strong_alias
    516 #undef no_color_video
    517 __strong_alias(no_color_video, no_color_attributes)
    518 #endif
    519 /*
    520  * no_color_attributes --
    521  *	Return attributes that cannot be combined with color.
    522  */
    523 attr_t
    524 no_color_attributes(void)
    525 {
    526 	return(_cursesi_screen->nca);
    527 }
    528 
    529 /*
    530  * __set_color --
    531  *	Set terminal foreground and background colours.
    532  */
    533 void
    534 __set_color( /*ARGSUSED*/ WINDOW *win, attr_t attr)
    535 {
    536 	short	pair;
    537 
    538 	if ((__do_color_init != 1) &&
    539 	    ((curscr->wattr & __COLOR) == (attr & __COLOR)))
    540 		return;
    541 
    542 	pair = PAIR_NUMBER((uint32_t)attr);
    543 	__CTRACE(__CTRACE_COLOR, "__set_color: %d, %d, %d\n", pair,
    544 	    _cursesi_screen->colour_pairs[pair].fore,
    545 	    _cursesi_screen->colour_pairs[pair].back);
    546 	switch (_cursesi_screen->color_type) {
    547 	/* Set ANSI foreground and background colours */
    548 	case COLOR_ANSI:
    549 		if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
    550 		    _cursesi_screen->colour_pairs[pair].back < 0)
    551 			__unset_color(curscr);
    552 		if (_cursesi_screen->colour_pairs[pair].fore >= 0)
    553 			tputs(tiparm(t_set_a_foreground(_cursesi_screen->term),
    554 			    (int)_cursesi_screen->colour_pairs[pair].fore),
    555 			    0, __cputchar);
    556 		if (_cursesi_screen->colour_pairs[pair].back >= 0)
    557 			tputs(tiparm(t_set_a_background(_cursesi_screen->term),
    558 			    (int)_cursesi_screen->colour_pairs[pair].back),
    559 			    0, __cputchar);
    560 		break;
    561 	case COLOR_HP:
    562 		/* XXX: need to support HP style */
    563 		break;
    564 	case COLOR_TEK:
    565 		/* XXX: need to support Tek style */
    566 		break;
    567 	case COLOR_OTHER:
    568 		if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
    569 		    _cursesi_screen->colour_pairs[pair].back < 0)
    570 			__unset_color(curscr);
    571 		if (_cursesi_screen->colour_pairs[pair].fore >= 0)
    572 			tputs(tiparm(t_set_foreground(_cursesi_screen->term),
    573 			    (int)_cursesi_screen->colour_pairs[pair].fore),
    574 			    0, __cputchar);
    575 		if (_cursesi_screen->colour_pairs[pair].back >= 0)
    576 			tputs(tiparm(t_set_background(_cursesi_screen->term),
    577 			    (int)_cursesi_screen->colour_pairs[pair].back),
    578 			    0, __cputchar);
    579 		break;
    580 	}
    581 	curscr->wattr &= ~__COLOR;
    582 	curscr->wattr |= attr & __COLOR;
    583 }
    584 
    585 /*
    586  * __unset_color --
    587  *	Clear terminal foreground and background colours.
    588  */
    589 void
    590 __unset_color(WINDOW *win)
    591 {
    592 	__CTRACE(__CTRACE_COLOR, "__unset_color\n");
    593 	switch (_cursesi_screen->color_type) {
    594 	/* Clear ANSI foreground and background colours */
    595 	case COLOR_ANSI:
    596 		if (orig_pair != NULL) {
    597 			tputs(orig_pair, 0, __cputchar);
    598 			win->wattr &= __mask_op;
    599 		}
    600 		break;
    601 	case COLOR_HP:
    602 		/* XXX: need to support HP style */
    603 		break;
    604 	case COLOR_TEK:
    605 		/* XXX: need to support Tek style */
    606 		break;
    607 	case COLOR_OTHER:
    608 		if (orig_pair != NULL) {
    609 			tputs(orig_pair, 0, __cputchar);
    610 			win->wattr &= __mask_op;
    611 		}
    612 		break;
    613 	}
    614 }
    615 
    616 /*
    617  * __restore_colors --
    618  *	Redo color definitions after restarting 'curses' mode.
    619  */
    620 void
    621 __restore_colors(void)
    622 {
    623 	if (can_change != 0)
    624 		switch (_cursesi_screen->color_type) {
    625 		case COLOR_HP:
    626 			/* XXX: need to re-initialise HP style (Ip) */
    627 			break;
    628 		case COLOR_TEK:
    629 			/* XXX: need to re-initialise Tek style (Ic) */
    630 			break;
    631 		}
    632 }
    633 
    634 /*
    635  * __change_pair --
    636  *	Mark dirty all positions using pair.
    637  */
    638 void
    639 __change_pair(short pair)
    640 {
    641 	struct __winlist	*wlp;
    642 	WINDOW			*win;
    643 	int			 y, x;
    644 	__LINE			*lp;
    645 	uint32_t		cl = COLOR_PAIR(pair);
    646 
    647 
    648 	for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
    649 		__CTRACE(__CTRACE_COLOR, "__change_pair: win = %p\n",
    650 		    wlp->winp);
    651 		win = wlp->winp;
    652 		if (win == __virtscr)
    653 			continue;
    654 		else if (win == curscr) {
    655 			/* Reset colour attribute on curscr */
    656 			__CTRACE(__CTRACE_COLOR,
    657 			    "__change_pair: win == curscr\n");
    658 			for (y = 0; y < curscr->maxy; y++) {
    659 				lp = curscr->alines[y];
    660 				for (x = 0; x < curscr->maxx; x++) {
    661 					if ((lp->line[x].attr & __COLOR) == cl)
    662 						lp->line[x].attr &= ~__COLOR;
    663 				}
    664 			}
    665 		} else {
    666 			/* Mark dirty those positions with colour pair "pair" */
    667 			for (y = 0; y < win->maxy; y++) {
    668 				lp = win->alines[y];
    669 				for (x = 0; x < win->maxx; x++)
    670 					if ((lp->line[x].attr &
    671 					    __COLOR) == cl) {
    672 						if (!(lp->flags & __ISDIRTY))
    673 							lp->flags |= __ISDIRTY;
    674 						/*
    675 						 * firstchp/lastchp are shared
    676 						 * between parent window and
    677 						 * sub-window.
    678 						 */
    679 						if (*lp->firstchp > x)
    680 							*lp->firstchp = x;
    681 
    682 						if (*lp->lastchp < x)
    683 							*lp->lastchp = x;
    684 					}
    685 #ifdef DEBUG
    686 				if ((win->alines[y]->flags & __ISDIRTY))
    687 					__CTRACE(__CTRACE_COLOR,
    688 					    "__change_pair: first = %d, "
    689 					    "last = %d\n",
    690 					    *win->alines[y]->firstchp,
    691 					    *win->alines[y]->lastchp);
    692 #endif
    693 			}
    694 		}
    695 	}
    696 }
    697