minix/lib/libcurses/color.c

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/* $NetBSD: color.c,v 1.37 2011/01/06 11:29:40 blymn Exp $ */
/*
* Copyright (c) 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Julian Coleman.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: color.c,v 1.37 2011/01/06 11:29:40 blymn Exp $");
#endif /* not lint */
#include "curses.h"
#include "curses_private.h"
/* Have we initialised colours? */
int __using_color = 0;
/* Default colour number */
attr_t __default_color = 0;
/* Default colour pair values - white on black. */
struct __pair __default_pair = {COLOR_WHITE, COLOR_BLACK, 0};
/* Default colour values */
/* Flags for colours and pairs */
#define __USED 0x01
static void
__change_pair(short);
/*
* has_colors --
* Check if terminal has colours.
*/
bool
has_colors(void)
{
if (max_colors > 0 && max_pairs > 0 &&
((set_a_foreground != NULL && set_a_background != NULL) ||
initialize_pair != NULL || initialize_color != NULL ||
(set_background != NULL && set_foreground != NULL)))
return(TRUE);
else
return(FALSE);
}
/*
* can_change_color --
* Check if terminal can change colours.
*/
bool
can_change_color(void)
{
if (can_change)
return(TRUE);
else
return(FALSE);
}
/*
* start_color --
* Initialise colour support.
*/
int
start_color(void)
{
int i;
attr_t temp_nc;
struct __winlist *wlp;
WINDOW *win;
int y, x;
if (has_colors() == FALSE)
return(ERR);
/* Max colours and colour pairs */
if (max_colors == -1)
COLORS = 0;
else {
COLORS = max_colors > MAX_COLORS ? MAX_COLORS : max_colors;
if (max_pairs == -1) {
COLOR_PAIRS = 0;
COLORS = 0;
} else {
COLOR_PAIRS = (max_pairs > MAX_PAIRS - 1 ?
MAX_PAIRS - 1 : max_pairs);
/* Use the last colour pair for curses default. */
__default_color = COLOR_PAIR(MAX_PAIRS - 1);
}
}
if (!COLORS)
return (ERR);
_cursesi_screen->COLORS = COLORS;
_cursesi_screen->COLOR_PAIRS = COLOR_PAIRS;
/* Reset terminal colour and colour pairs. */
if (orig_colors != NULL)
tputs(orig_colors, 0, __cputchar);
if (orig_pair != NULL) {
tputs(orig_pair, 0, __cputchar);
curscr->wattr &= _cursesi_screen->mask_op;
}
/* Type of colour manipulation - ANSI/TEK/HP/other */
if (set_a_foreground != NULL && set_a_background != NULL)
_cursesi_screen->color_type = COLOR_ANSI;
else if (initialize_pair != NULL)
_cursesi_screen->color_type = COLOR_HP;
else if (initialize_color != NULL)
_cursesi_screen->color_type = COLOR_TEK;
else if (set_foreground != NULL && set_background != NULL)
_cursesi_screen->color_type = COLOR_OTHER;
else
return(ERR); /* Unsupported colour method */
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "start_color: COLORS = %d, COLOR_PAIRS = %d",
COLORS, COLOR_PAIRS);
switch (_cursesi_screen->color_type) {
case COLOR_ANSI:
__CTRACE(__CTRACE_COLOR, " (ANSI style)\n");
break;
case COLOR_HP:
__CTRACE(__CTRACE_COLOR, " (HP style)\n");
break;
case COLOR_TEK:
__CTRACE(__CTRACE_COLOR, " (Tektronics style)\n");
break;
case COLOR_OTHER:
__CTRACE(__CTRACE_COLOR, " (Other style)\n");
break;
}
#endif
/*
* Attributes that cannot be used with color.
* Store these in an attr_t for wattrset()/wattron().
*/
_cursesi_screen->nca = __NORMAL;
if (no_color_video != -1) {
temp_nc = (attr_t) t_no_color_video(_cursesi_screen->term);
if (temp_nc & 0x0001)
_cursesi_screen->nca |= __STANDOUT;
if (temp_nc & 0x0002)
_cursesi_screen->nca |= __UNDERSCORE;
if (temp_nc & 0x0004)
_cursesi_screen->nca |= __REVERSE;
if (temp_nc & 0x0008)
_cursesi_screen->nca |= __BLINK;
if (temp_nc & 0x0010)
_cursesi_screen->nca |= __DIM;
if (temp_nc & 0x0020)
_cursesi_screen->nca |= __BOLD;
if (temp_nc & 0x0040)
_cursesi_screen->nca |= __BLANK;
if (temp_nc & 0x0080)
_cursesi_screen->nca |= __PROTECT;
if (temp_nc & 0x0100)
_cursesi_screen->nca |= __ALTCHARSET;
}
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "start_color: _cursesi_screen->nca = %08x\n",
_cursesi_screen->nca);
#endif
/* Set up initial 8 colours */
if (COLORS >= COLOR_BLACK)
(void) init_color(COLOR_BLACK, 0, 0, 0);
if (COLORS >= COLOR_RED)
(void) init_color(COLOR_RED, 1000, 0, 0);
if (COLORS >= COLOR_GREEN)
(void) init_color(COLOR_GREEN, 0, 1000, 0);
if (COLORS >= COLOR_YELLOW)
(void) init_color(COLOR_YELLOW, 1000, 1000, 0);
if (COLORS >= COLOR_BLUE)
(void) init_color(COLOR_BLUE, 0, 0, 1000);
if (COLORS >= COLOR_MAGENTA)
(void) init_color(COLOR_MAGENTA, 1000, 0, 1000);
if (COLORS >= COLOR_CYAN)
(void) init_color(COLOR_CYAN, 0, 1000, 1000);
if (COLORS >= COLOR_WHITE)
(void) init_color(COLOR_WHITE, 1000, 1000, 1000);
/* Initialise other colours */
for (i = 8; i < COLORS; i++) {
_cursesi_screen->colours[i].red = 0;
_cursesi_screen->colours[i].green = 0;
_cursesi_screen->colours[i].blue = 0;
_cursesi_screen->colours[i].flags = 0;
}
/* Initialise pair 0 to default colours. */
_cursesi_screen->colour_pairs[0].fore = -1;
_cursesi_screen->colour_pairs[0].back = -1;
_cursesi_screen->colour_pairs[0].flags = 0;
/* Initialise user colour pairs to default (white on black) */
for (i = 0; i < COLOR_PAIRS; i++) {
_cursesi_screen->colour_pairs[i].fore = COLOR_WHITE;
_cursesi_screen->colour_pairs[i].back = COLOR_BLACK;
_cursesi_screen->colour_pairs[i].flags = 0;
}
/* Initialise default colour pair. */
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore =
__default_pair.fore;
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back =
__default_pair.back;
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags =
__default_pair.flags;
__using_color = 1;
/* Set all positions on all windows to curses default colours. */
for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
win = wlp->winp;
if (wlp->winp != __virtscr && wlp->winp != curscr) {
/* Set color attribute on other windows */
win->battr |= __default_color;
for (y = 0; y < win->maxy; y++) {
for (x = 0; x < win->maxx; x++) {
win->alines[y]->line[x].attr &= ~__COLOR;
win->alines[y]->line[x].attr |= __default_color;
}
}
__touchwin(win);
}
}
return(OK);
}
/*
* init_pair --
* Set pair foreground and background colors.
* Our default colour ordering is ANSI - 1 = red, 4 = blue, 3 = yellow,
* 6 = cyan. The older style (Sb/Sf) uses 1 = blue, 4 = red, 3 = cyan,
* 6 = yellow, so we swap them here and in pair_content().
*/
int
init_pair(short pair, short fore, short back)
{
int changed;
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "init_pair: %d, %d, %d\n", pair, fore, back);
#endif
if (pair < 0 || pair >= COLOR_PAIRS)
return (ERR);
if (pair == 0) /* Ignore request for pair 0, it is default. */
return OK;
if (fore >= COLORS)
return (ERR);
if (back >= COLORS)
return (ERR);
/* Swap red/blue and yellow/cyan */
if (_cursesi_screen->color_type == COLOR_OTHER) {
switch (fore) {
case COLOR_RED:
fore = COLOR_BLUE;
break;
case COLOR_BLUE:
fore = COLOR_RED;
break;
case COLOR_YELLOW:
fore = COLOR_CYAN;
break;
case COLOR_CYAN:
fore = COLOR_YELLOW;
break;
}
switch (back) {
case COLOR_RED:
back = COLOR_BLUE;
break;
case COLOR_BLUE:
back = COLOR_RED;
break;
case COLOR_YELLOW:
back = COLOR_CYAN;
break;
case COLOR_CYAN:
back = COLOR_YELLOW;
break;
}
}
if ((_cursesi_screen->colour_pairs[pair].flags & __USED) &&
(fore != _cursesi_screen->colour_pairs[pair].fore ||
back != _cursesi_screen->colour_pairs[pair].back))
changed = 1;
else
changed = 0;
_cursesi_screen->colour_pairs[pair].flags |= __USED;
_cursesi_screen->colour_pairs[pair].fore = fore;
_cursesi_screen->colour_pairs[pair].back = back;
/* XXX: need to initialise HP style (Ip) */
if (changed)
__change_pair(pair);
return (OK);
}
/*
* pair_content --
* Get pair foreground and background colours.
*/
int
pair_content(short pair, short *forep, short *backp)
{
if (pair < 0 || pair > _cursesi_screen->COLOR_PAIRS)
return(ERR);
*forep = _cursesi_screen->colour_pairs[pair].fore;
*backp = _cursesi_screen->colour_pairs[pair].back;
/* Swap red/blue and yellow/cyan */
if (_cursesi_screen->color_type == COLOR_OTHER) {
switch (*forep) {
case COLOR_RED:
*forep = COLOR_BLUE;
break;
case COLOR_BLUE:
*forep = COLOR_RED;
break;
case COLOR_YELLOW:
*forep = COLOR_CYAN;
break;
case COLOR_CYAN:
*forep = COLOR_YELLOW;
break;
}
switch (*backp) {
case COLOR_RED:
*backp = COLOR_BLUE;
break;
case COLOR_BLUE:
*backp = COLOR_RED;
break;
case COLOR_YELLOW:
*backp = COLOR_CYAN;
break;
case COLOR_CYAN:
*backp = COLOR_YELLOW;
break;
}
}
return(OK);
}
/*
* init_color --
* Set colour red, green and blue values.
*/
int
init_color(short color, short red, short green, short blue)
{
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "init_color: %d, %d, %d, %d\n",
color, red, green, blue);
#endif
if (color < 0 || color >= _cursesi_screen->COLORS)
return(ERR);
_cursesi_screen->colours[color].red = red;
_cursesi_screen->colours[color].green = green;
_cursesi_screen->colours[color].blue = blue;
/* XXX Not yet implemented */
return(ERR);
/* XXX: need to initialise Tek style (Ic) and support HLS */
}
/*
* color_content --
* Get colour red, green and blue values.
*/
int
color_content(short color, short *redp, short *greenp, short *bluep)
{
if (color < 0 || color >= _cursesi_screen->COLORS)
return(ERR);
*redp = _cursesi_screen->colours[color].red;
*greenp = _cursesi_screen->colours[color].green;
*bluep = _cursesi_screen->colours[color].blue;
return(OK);
}
/*
* use_default_colors --
* Use terminal default colours instead of curses default colour.
*/
int
use_default_colors()
{
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "use_default_colors\n");
#endif
return(assume_default_colors(-1, -1));
}
/*
* assume_default_colors --
* Set the default foreground and background colours.
*/
int
assume_default_colors(short fore, short back)
{
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "assume_default_colors: %d, %d\n",
fore, back);
__CTRACE(__CTRACE_COLOR, "assume_default_colors: default_colour = %d, pair_number = %d\n", __default_color, PAIR_NUMBER(__default_color));
#endif
/* Swap red/blue and yellow/cyan */
if (_cursesi_screen->color_type == COLOR_OTHER) {
switch (fore) {
case COLOR_RED:
fore = COLOR_BLUE;
break;
case COLOR_BLUE:
fore = COLOR_RED;
break;
case COLOR_YELLOW:
fore = COLOR_CYAN;
break;
case COLOR_CYAN:
fore = COLOR_YELLOW;
break;
}
switch (back) {
case COLOR_RED:
back = COLOR_BLUE;
break;
case COLOR_BLUE:
back = COLOR_RED;
break;
case COLOR_YELLOW:
back = COLOR_CYAN;
break;
case COLOR_CYAN:
back = COLOR_YELLOW;
break;
}
}
__default_pair.fore = fore;
__default_pair.back = back;
__default_pair.flags = __USED;
if (COLOR_PAIRS) {
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].fore = fore;
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].back = back;
_cursesi_screen->colour_pairs[PAIR_NUMBER(__default_color)].flags = __USED;
}
/*
* If we've already called start_color(), make sure all instances
* of the curses default colour pair are dirty.
*/
if (__using_color)
__change_pair(PAIR_NUMBER(__default_color));
return(OK);
}
/* no_color_video is a terminfo macro, but we need to retain binary compat */
#ifdef __strong_alias
#undef no_color_video
__strong_alias(no_color_video, no_color_attributes)
#endif
/*
* no_color_attributes --
* Return attributes that cannot be combined with color.
*/
attr_t
no_color_attributes(void)
{
return(_cursesi_screen->nca);
}
/*
* __set_color --
* Set terminal foreground and background colours.
*/
void
__set_color( /*ARGSUSED*/ WINDOW *win, attr_t attr)
{
short pair;
if ((curscr->wattr & __COLOR) == (attr & __COLOR))
return;
pair = PAIR_NUMBER((u_int32_t)attr);
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "__set_color: %d, %d, %d\n", pair,
_cursesi_screen->colour_pairs[pair].fore,
_cursesi_screen->colour_pairs[pair].back);
#endif
switch (_cursesi_screen->color_type) {
/* Set ANSI forground and background colours */
case COLOR_ANSI:
if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
_cursesi_screen->colour_pairs[pair].back < 0)
__unset_color(curscr);
if (_cursesi_screen->colour_pairs[pair].fore >= 0)
tputs(vtparm(t_set_a_foreground(_cursesi_screen->term),
_cursesi_screen->colour_pairs[pair].fore),
0, __cputchar);
if (_cursesi_screen->colour_pairs[pair].back >= 0)
tputs(vtparm(t_set_a_background(_cursesi_screen->term),
_cursesi_screen->colour_pairs[pair].back),
0, __cputchar);
break;
case COLOR_HP:
/* XXX: need to support HP style */
break;
case COLOR_TEK:
/* XXX: need to support Tek style */
break;
case COLOR_OTHER:
if (_cursesi_screen->colour_pairs[pair].fore < 0 ||
_cursesi_screen->colour_pairs[pair].back < 0)
__unset_color(curscr);
if (_cursesi_screen->colour_pairs[pair].fore >= 0)
tputs(vtparm(t_set_foreground(_cursesi_screen->term),
_cursesi_screen->colour_pairs[pair].fore),
0, __cputchar);
if (_cursesi_screen->colour_pairs[pair].back >= 0)
tputs(vtparm(t_set_background(_cursesi_screen->term),
_cursesi_screen->colour_pairs[pair].back),
0, __cputchar);
break;
}
curscr->wattr &= ~__COLOR;
curscr->wattr |= attr & __COLOR;
}
/*
* __unset_color --
* Clear terminal foreground and background colours.
*/
void
__unset_color(WINDOW *win)
{
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "__unset_color\n");
#endif
switch (_cursesi_screen->color_type) {
/* Clear ANSI forground and background colours */
case COLOR_ANSI:
if (orig_pair != NULL) {
tputs(orig_pair, 0, __cputchar);
win->wattr &= __mask_op;
}
break;
case COLOR_HP:
/* XXX: need to support HP style */
break;
case COLOR_TEK:
/* XXX: need to support Tek style */
break;
case COLOR_OTHER:
if (orig_pair != NULL) {
tputs(orig_pair, 0, __cputchar);
win->wattr &= __mask_op;
}
break;
}
}
/*
* __restore_colors --
* Redo color definitions after restarting 'curses' mode.
*/
void
__restore_colors(void)
{
if (can_change != 0)
switch (_cursesi_screen->color_type) {
case COLOR_HP:
/* XXX: need to re-initialise HP style (Ip) */
break;
case COLOR_TEK:
/* XXX: need to re-initialise Tek style (Ic) */
break;
}
}
/*
* __change_pair --
* Mark dirty all positions using pair.
*/
void
__change_pair(short pair)
{
struct __winlist *wlp;
WINDOW *win;
int y, x;
__LINE *lp;
uint32_t cl = COLOR_PAIR(pair);
for (wlp = _cursesi_screen->winlistp; wlp != NULL; wlp = wlp->nextp) {
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR, "__change_pair: win = %p\n",
wlp->winp);
#endif
win = wlp->winp;
if (win == __virtscr)
continue;
else if (win == curscr) {
/* Reset colour attribute on curscr */
#ifdef DEBUG
__CTRACE(__CTRACE_COLOR,
"__change_pair: win == curscr\n");
#endif
for (y = 0; y < curscr->maxy; y++) {
lp = curscr->alines[y];
for (x = 0; x < curscr->maxx; x++) {
if ((lp->line[x].attr & __COLOR) == cl)
lp->line[x].attr &= ~__COLOR;
}
}
} else {
/* Mark dirty those positions with colour pair "pair" */
for (y = 0; y < win->maxy; y++) {
lp = win->alines[y];
for (x = 0; x < win->maxx; x++)
if ((lp->line[x].attr &
__COLOR) == cl) {
if (!(lp->flags & __ISDIRTY))
lp->flags |= __ISDIRTY;
/*
* firstchp/lastchp are shared
* between parent window and
* sub-window.
*/
if (*lp->firstchp > x)
*lp->firstchp = x;
if (*lp->lastchp < x)
*lp->lastchp = x;
}
#ifdef DEBUG
if ((win->alines[y]->flags & __ISDIRTY))
__CTRACE(__CTRACE_COLOR,
"__change_pair: first = %d, "
"last = %d\n",
*win->alines[y]->firstchp,
*win->alines[y]->lastchp);
#endif
}
}
}
}