X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_color.c;h=9cae495436fecc4f3a3b80546e6a18d05fe4dbec;hp=297a14c36d6eaf518825f697d0c2918771d9fdb6;hb=d8b5e3f8187d68e90f8146e866470fcff148073d;hpb=0eb88fc5281804773e2a0c7a488a4452463535ce diff --git a/ncurses/base/lib_color.c b/ncurses/base/lib_color.c index 297a14c3..9cae4954 100644 --- a/ncurses/base/lib_color.c +++ b/ncurses/base/lib_color.c @@ -1,5 +1,5 @@ /**************************************************************************** - * Copyright (c) 1998 Free Software Foundation, Inc. * + * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * @@ -29,27 +29,50 @@ /**************************************************************************** * Author: Zeyd M. Ben-Halim 1992,1995 * * and: Eric S. Raymond * + * and: Thomas E. Dickey 1996-on * ****************************************************************************/ /* lib_color.c * * Handles color emulation of SYS V curses - * */ #include #include +#include -MODULE_ID("$Id: lib_color.c,v 1.36 1999/10/03 00:20:37 Philippe.Blain Exp $") +MODULE_ID("$Id: lib_color.c,v 1.85 2007/04/07 17:07:28 tom Exp $") /* * These should be screen structure members. They need to be globals for - * hystorical reasons. So we assign them in start_color() and also in + * historical reasons. So we assign them in start_color() and also in * set_term()'s screen-switching logic. */ -int COLOR_PAIRS; -int COLORS; +#if USE_REENTRANT +NCURSES_EXPORT(int) +NCURSES_PUBLIC_VAR(COLOR_PAIRS) (void) +{ + return SP ? SP->_pair_count : -1; +} +NCURSES_EXPORT(int) +NCURSES_PUBLIC_VAR(COLORS) (void) +{ + return SP ? SP->_color_count : -1; +} +#else +NCURSES_EXPORT_VAR(int) COLOR_PAIRS = 0; +NCURSES_EXPORT_VAR(int) COLORS = 0; +#endif + +#define DATA(r,g,b) {r,g,b, 0,0,0, 0} + +#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts)) + +#define MAX_PALETTE 8 + +#define OkColorHi(n) (((n) < COLORS) && ((n) < max_colors)) +#define InPalette(n) ((n) >= 0 && (n) < MAX_PALETTE) /* * Given a RGB range of 0..1000, we'll normally set the individual values @@ -57,141 +80,227 @@ int COLORS; */ #define RGB_ON 680 #define RGB_OFF 0 - +/* *INDENT-OFF* */ static const color_t cga_palette[] = { - /* R G B */ - {RGB_OFF, RGB_OFF, RGB_OFF}, /* COLOR_BLACK */ - {RGB_ON, RGB_OFF, RGB_OFF}, /* COLOR_RED */ - {RGB_OFF, RGB_ON, RGB_OFF}, /* COLOR_GREEN */ - {RGB_ON, RGB_ON, RGB_OFF}, /* COLOR_YELLOW */ - {RGB_OFF, RGB_OFF, RGB_ON}, /* COLOR_BLUE */ - {RGB_ON, RGB_OFF, RGB_ON}, /* COLOR_MAGENTA */ - {RGB_OFF, RGB_ON, RGB_ON}, /* COLOR_CYAN */ - {RGB_ON, RGB_ON, RGB_ON}, /* COLOR_WHITE */ + /* R G B */ + DATA(RGB_OFF, RGB_OFF, RGB_OFF), /* COLOR_BLACK */ + DATA(RGB_ON, RGB_OFF, RGB_OFF), /* COLOR_RED */ + DATA(RGB_OFF, RGB_ON, RGB_OFF), /* COLOR_GREEN */ + DATA(RGB_ON, RGB_ON, RGB_OFF), /* COLOR_YELLOW */ + DATA(RGB_OFF, RGB_OFF, RGB_ON), /* COLOR_BLUE */ + DATA(RGB_ON, RGB_OFF, RGB_ON), /* COLOR_MAGENTA */ + DATA(RGB_OFF, RGB_ON, RGB_ON), /* COLOR_CYAN */ + DATA(RGB_ON, RGB_ON, RGB_ON), /* COLOR_WHITE */ }; + static const color_t hls_palette[] = { - /* H L S */ - {0, 0, 0}, /* COLOR_BLACK */ - {120, 50, 100}, /* COLOR_RED */ - {240, 50, 100}, /* COLOR_GREEN */ - {180, 50, 100}, /* COLOR_YELLOW */ - {330, 50, 100}, /* COLOR_BLUE */ - {60, 50, 100}, /* COLOR_MAGENTA */ - {300, 50, 100}, /* COLOR_CYAN */ - {0, 50, 100}, /* COLOR_WHITE */ + /* H L S */ + DATA( 0, 0, 0), /* COLOR_BLACK */ + DATA( 120, 50, 100), /* COLOR_RED */ + DATA( 240, 50, 100), /* COLOR_GREEN */ + DATA( 180, 50, 100), /* COLOR_YELLOW */ + DATA( 330, 50, 100), /* COLOR_BLUE */ + DATA( 60, 50, 100), /* COLOR_MAGENTA */ + DATA( 300, 50, 100), /* COLOR_CYAN */ + DATA( 0, 50, 100), /* COLOR_WHITE */ }; +/* *INDENT-ON* */ + +#if NCURSES_EXT_FUNCS +/* + * These are called from _nc_do_color(), which in turn is called from + * vidattr - so we have to assume that SP may be null. + */ +static int +default_fg(void) +{ + return (SP != 0) ? SP->_default_fg : COLOR_WHITE; +} + +static int +default_bg(void) +{ + return SP != 0 ? SP->_default_bg : COLOR_BLACK; +} +#else +#define default_fg() COLOR_WHITE +#define default_bg() COLOR_BLACK +#endif /* * SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly * to maintain compatibility with a pre-ANSI scheme. The same scheme is * also used in the FreeBSD syscons. */ -static int toggled_colors(int c) +static int +toggled_colors(int c) { if (c < 16) { static const int table[] = - { 0, 4, 2, 6, 1, 5, 3, 7, - 8, 12, 10, 14, 9, 13, 11, 15}; + {0, 4, 2, 6, 1, 5, 3, 7, + 8, 12, 10, 14, 9, 13, 11, 15}; c = table[c]; } return c; } -static void set_background_color(int bg, int (*outc)(int)) +static void +set_background_color(int bg, int (*outc) (int)) { - if (set_a_background) - { - TPUTS_TRACE("set_a_background"); - tputs(tparm(set_a_background, bg), 1, outc); - } - else - { - TPUTS_TRACE("set_background"); - tputs(tparm(set_background, toggled_colors(bg)), 1, outc); - } + if (set_a_background) { + TPUTS_TRACE("set_a_background"); + tputs(TPARM_1(set_a_background, bg), 1, outc); + } else { + TPUTS_TRACE("set_background"); + tputs(TPARM_1(set_background, toggled_colors(bg)), 1, outc); + } } -static void set_foreground_color(int fg, int (*outc)(int)) +static void +set_foreground_color(int fg, int (*outc) (int)) { - if (set_a_foreground) - { - TPUTS_TRACE("set_a_foreground"); - tputs(tparm(set_a_foreground, fg), 1, outc); - } - else - { - TPUTS_TRACE("set_foreground"); - tputs(tparm(set_foreground, toggled_colors(fg)), 1, outc); - } + if (set_a_foreground) { + TPUTS_TRACE("set_a_foreground"); + tputs(TPARM_1(set_a_foreground, fg), 1, outc); + } else { + TPUTS_TRACE("set_foreground"); + tputs(TPARM_1(set_foreground, toggled_colors(fg)), 1, outc); + } } -static bool set_original_colors(void) +static void +init_color_table(void) { - if (orig_pair != 0) { - TPUTS_TRACE("orig_pair"); - putp(orig_pair); - return TRUE; - } - else if (orig_colors != NULL) - { - TPUTS_TRACE("orig_colors"); - putp(orig_colors); - return TRUE; + const color_t *tp; + int n; + + tp = (hue_lightness_saturation) ? hls_palette : cga_palette; + for (n = 0; n < COLORS; n++) { + if (InPalette(n)) { + SP->_color_table[n] = tp[n]; + } else { + SP->_color_table[n] = tp[n % MAX_PALETTE]; + if (hue_lightness_saturation) { + SP->_color_table[n].green = 100; + } else { + if (SP->_color_table[n].red) + SP->_color_table[n].red = 1000; + if (SP->_color_table[n].green) + SP->_color_table[n].green = 1000; + if (SP->_color_table[n].blue) + SP->_color_table[n].blue = 1000; + } } - return FALSE; + } } -int start_color(void) +/* + * Reset the color pair, e.g., to whatever color pair 0 is. + */ +static bool +reset_color_pair(void) { - T((T_CALLED("start_color()"))); + bool result = FALSE; + + if (orig_pair != 0) { + TPUTS_TRACE("orig_pair"); + putp(orig_pair); + result = TRUE; + } + return result; +} - if (set_original_colors() != TRUE) - { - set_foreground_color(COLOR_WHITE, _nc_outch); - set_background_color(COLOR_BLACK, _nc_outch); +/* + * Reset color pairs and definitions. Actually we do both more to accommodate + * badly-written terminal descriptions than for the relatively rare case where + * someone has changed the color definitions. + */ +bool +_nc_reset_colors(void) +{ + int result = FALSE; + + T((T_CALLED("_nc_reset_colors()"))); + if (SP->_color_defs > 0) + SP->_color_defs = -(SP->_color_defs); + + if (reset_color_pair()) + result = TRUE; + if (orig_colors != 0) { + TPUTS_TRACE("orig_colors"); + putp(orig_colors); + result = TRUE; + } + returnBool(result); +} + +NCURSES_EXPORT(int) +start_color(void) +{ + int result = ERR; + + T((T_CALLED("start_color()"))); + + if (SP == 0) { + result = ERR; + } else if (SP->_coloron) { + result = OK; + } else { + + if (reset_color_pair() != TRUE) { + set_foreground_color(default_fg(), _nc_outch); + set_background_color(default_bg(), _nc_outch); } - if (max_pairs != -1) - COLOR_PAIRS = SP->_pair_count = max_pairs; - else - returnCode(ERR); - if ((SP->_color_pairs = typeCalloc(unsigned short, max_pairs)) == 0) - returnCode(ERR); - SP->_color_pairs[0] = PAIR_OF(COLOR_WHITE, COLOR_BLACK); - if (max_colors != -1) - COLORS = SP->_color_count = max_colors; - else - returnCode(ERR); - SP->_coloron = 1; - - if ((SP->_color_table = typeMalloc(color_t, COLORS)) == 0) - returnCode(ERR); - if (hue_lightness_saturation) - memcpy(SP->_color_table, hls_palette, sizeof(color_t) * COLORS); - else - memcpy(SP->_color_table, cga_palette, sizeof(color_t) * COLORS); - - T(("started color: COLORS = %d, COLOR_PAIRS = %d", COLORS, COLOR_PAIRS)); - - returnCode(OK); + if (max_pairs > 0 && max_colors > 0) { + SP->_pair_count = max_pairs; + SP->_color_count = max_colors; +#if !USE_REENTRANT + COLOR_PAIRS = max_pairs; + COLORS = max_colors; +#endif + + if ((SP->_color_pairs = TYPE_CALLOC(colorpair_t, + max_pairs)) != 0) { + if ((SP->_color_table = TYPE_CALLOC(color_t, + max_colors)) != 0) { + SP->_color_pairs[0] = PAIR_OF(default_fg(), default_bg()); + init_color_table(); + + T(("started color: COLORS = %d, COLOR_PAIRS = %d", + COLORS, COLOR_PAIRS)); + + SP->_coloron = 1; + result = OK; + } else if (SP->_color_pairs != 0) { + FreeAndNull(SP->_color_pairs); + } + } + } else { + result = OK; + } + } + returnCode(result); } /* This function was originally written by Daniel Weaver */ -static void rgb2hls(short r, short g, short b, short *h, short *l, short *s) +static void +rgb2hls(short r, short g, short b, short *h, short *l, short *s) /* convert RGB to HLS system */ { short min, max, t; - if ((min = g < r ? g : r) > b) min = b; - if ((max = g > r ? g : r) < b) max = b; + if ((min = g < r ? g : r) > b) + min = b; + if ((max = g > r ? g : r) < b) + max = b; /* calculate lightness */ *l = (min + max) / 20; - if (min == max) /* black, white and all shades of gray */ - { + if (min == max) { /* black, white and all shades of gray */ *h = 0; *s = 0; return; @@ -200,16 +309,16 @@ static void rgb2hls(short r, short g, short b, short *h, short *l, short *s) /* calculate saturation */ if (*l < 50) *s = ((max - min) * 100) / (max + min); - else *s = ((max - min) * 100) / (2000 - max - min); + else + *s = ((max - min) * 100) / (2000 - max - min); /* calculate hue */ if (r == max) t = 120 + ((g - b) * 60) / (max - min); + else if (g == max) + t = 240 + ((b - r) * 60) / (max - min); else - if (g == max) - t = 240 + ((b - r) * 60) / (max - min); - else - t = 360 + ((r - g) * 60) / (max - min); + t = 360 + ((r - g) * 60) / (max - min); *h = t % 360; } @@ -218,212 +327,267 @@ static void rgb2hls(short r, short g, short b, short *h, short *l, short *s) * Extension (1997/1/18) - Allow negative f/b values to set default color * values. */ -int init_pair(short pair, short f, short b) +NCURSES_EXPORT(int) +init_pair(short pair, short f, short b) { - unsigned result; - - T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b)); - - if ((pair < 1) || (pair >= COLOR_PAIRS)) - returnCode(ERR); - if (SP->_default_color) - { - if (f < 0) - f = C_MASK; - if (b < 0) - b = C_MASK; - if (f >= COLORS && f != C_MASK) - returnCode(ERR); - if (b >= COLORS && b != C_MASK) - returnCode(ERR); - } - else - if ((f < 0) || (f >= COLORS) - || (b < 0) || (b >= COLORS)) - returnCode(ERR); - - /* - * When a pair's content is changed, replace its colors (if pair was - * initialized before a screen update is performed replacing original - * pair colors with the new ones). - */ - result = PAIR_OF(f,b); - if (SP->_color_pairs[pair] != 0 - && SP->_color_pairs[pair] != result) { - int y, x; - attr_t z = COLOR_PAIR(pair); - - for (y = 0; y <= curscr->_maxy; y++) { - struct ldat *ptr = &(curscr->_line[y]); - bool changed = FALSE; - for (x = 0; x <= curscr->_maxx; x++) { - if ((ptr->text[x] & A_COLOR) == z) { - /* Set the old cell to zero to ensure it will be - updated on the next doupdate() */ - ptr->text[x] = 0; - CHANGED_CELL(ptr,x); - changed = TRUE; - } + colorpair_t result; + + T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b)); + + if ((pair < 0) || (pair >= COLOR_PAIRS) || SP == 0 || !SP->_coloron) + returnCode(ERR); +#if NCURSES_EXT_FUNCS + if (SP->_default_color) { + if (f < 0) + f = COLOR_DEFAULT; + if (b < 0) + b = COLOR_DEFAULT; + if (!OkColorHi(f) && !isDefaultColor(f)) + returnCode(ERR); + if (!OkColorHi(b) && !isDefaultColor(b)) + returnCode(ERR); + } else +#endif + { + if ((f < 0) || !OkColorHi(f) + || (b < 0) || !OkColorHi(b) + || (pair < 1)) + returnCode(ERR); + } + + /* + * When a pair's content is changed, replace its colors (if pair was + * initialized before a screen update is performed replacing original + * pair colors with the new ones). + */ + result = PAIR_OF(f, b); + if (SP->_color_pairs[pair] != 0 + && SP->_color_pairs[pair] != result) { + int y, x; + + for (y = 0; y <= curscr->_maxy; y++) { + struct ldat *ptr = &(curscr->_line[y]); + bool changed = FALSE; + for (x = 0; x <= curscr->_maxx; x++) { + if (GetPair(ptr->text[x]) == pair) { + /* Set the old cell to zero to ensure it will be + updated on the next doupdate() */ + SetChar(ptr->text[x], 0, 0); + CHANGED_CELL(ptr, x); + changed = TRUE; } - if (changed) - _nc_make_oldhash(y); - } - } - SP->_color_pairs[pair] = result; - - if (initialize_pair) - { - const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette; - - T(("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)", - pair, - tp[f].red, tp[f].green, tp[f].blue, - tp[b].red, tp[b].green, tp[b].blue)); - - if (initialize_pair) - { - TPUTS_TRACE("initialize_pair"); - putp(tparm(initialize_pair, - pair, - tp[f].red, tp[f].green, tp[f].blue, - tp[b].red, tp[b].green, tp[b].blue)); } + if (changed) + _nc_make_oldhash(y); } + } + SP->_color_pairs[pair] = result; + if (GET_SCREEN_PAIR(SP) == pair) + SET_SCREEN_PAIR(SP, (chtype) (~0)); /* force attribute update */ + + if (initialize_pair && InPalette(f) && InPalette(b)) { + const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette; + + TR(TRACE_ATTRS, + ("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)", + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + + TPUTS_TRACE("initialize_pair"); + putp(TPARM_7(initialize_pair, + pair, + tp[f].red, tp[f].green, tp[f].blue, + tp[b].red, tp[b].green, tp[b].blue)); + } - returnCode(OK); + returnCode(OK); } -int init_color(short color, short r, short g, short b) +#define okRGB(n) ((n) >= 0 && (n) <= 1000) + +NCURSES_EXPORT(int) +init_color(short color, short r, short g, short b) { - T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b)); + int result = ERR; + + T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b)); - if (initialize_color == NULL) - returnCode(ERR); + if (initialize_color != NULL + && SP != 0 + && SP->_coloron + && (color >= 0 && OkColorHi(color)) + && (okRGB(r) && okRGB(g) && okRGB(b))) { - if (color < 0 || color >= COLORS) - returnCode(ERR); - if (r < 0 || r > 1000 || g < 0 || g > 1000 || b < 0 || b > 1000) - returnCode(ERR); + SP->_color_table[color].init = 1; + SP->_color_table[color].r = r; + SP->_color_table[color].g = g; + SP->_color_table[color].b = b; - if (hue_lightness_saturation) + if (hue_lightness_saturation) { rgb2hls(r, g, b, - &SP->_color_table[color].red, - &SP->_color_table[color].green, - &SP->_color_table[color].blue); - else - { - SP->_color_table[color].red = r; - SP->_color_table[color].green = g; - SP->_color_table[color].blue = b; + &SP->_color_table[color].red, + &SP->_color_table[color].green, + &SP->_color_table[color].blue); + } else { + SP->_color_table[color].red = r; + SP->_color_table[color].green = g; + SP->_color_table[color].blue = b; } - if (initialize_color) - { - TPUTS_TRACE("initialize_color"); - putp(tparm(initialize_color, color, r, g, b)); - } - returnCode(OK); + TPUTS_TRACE("initialize_color"); + putp(TPARM_4(initialize_color, color, r, g, b)); + SP->_color_defs = max(color + 1, SP->_color_defs); + result = OK; + } + returnCode(result); } -bool can_change_color(void) +NCURSES_EXPORT(bool) +can_change_color(void) { - T((T_CALLED("can_change_color()"))); - returnCode ((can_change != 0) ? TRUE : FALSE); + T((T_CALLED("can_change_color()"))); + returnCode((can_change != 0) ? TRUE : FALSE); } -bool has_colors(void) +NCURSES_EXPORT(bool) +has_colors(void) { - T((T_CALLED("has_colors()"))); - returnCode (((max_colors != -1) && (max_pairs != -1) - && (((set_foreground != NULL) - && (set_background != NULL)) - || ((set_a_foreground != NULL) - && (set_a_background != NULL)) - || set_color_pair)) ? TRUE : FALSE); + T((T_CALLED("has_colors()"))); + returnCode((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs) + && (((set_foreground != NULL) + && (set_background != NULL)) + || ((set_a_foreground != NULL) + && (set_a_background != NULL)) + || set_color_pair)) ? TRUE : FALSE); } -int color_content(short color, short *r, short *g, short *b) +NCURSES_EXPORT(int) +color_content(short color, short *r, short *g, short *b) { - T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b)); - if (color < 0 || color >= COLORS) - returnCode(ERR); + int result; - if (r) *r = SP->_color_table[color].red; - if (g) *g = SP->_color_table[color].green; - if (b) *b = SP->_color_table[color].blue; - returnCode(OK); + T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b)); + if (color < 0 || !OkColorHi(color) || SP == 0 || !SP->_coloron) { + result = ERR; + } else { + NCURSES_COLOR_T c_r = SP->_color_table[color].red; + NCURSES_COLOR_T c_g = SP->_color_table[color].green; + NCURSES_COLOR_T c_b = SP->_color_table[color].blue; + + if (r) + *r = c_r; + if (g) + *g = c_g; + if (b) + *b = c_b; + + TR(TRACE_ATTRS, ("...color_content(%d,%d,%d,%d)", + color, c_r, c_g, c_b)); + result = OK; + } + returnCode(result); } -int pair_content(short pair, short *f, short *b) +NCURSES_EXPORT(int) +pair_content(short pair, short *f, short *b) { - T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b)); - - if ((pair < 0) || (pair >= COLOR_PAIRS)) - returnCode(ERR); - if (f) *f = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK); - if (b) *b = (SP->_color_pairs[pair] & C_MASK); - - returnCode(OK); + int result; + + T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b)); + + if ((pair < 0) || (pair >= COLOR_PAIRS) || SP == 0 || !SP->_coloron) { + result = ERR; + } else { + NCURSES_COLOR_T fg = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK); + NCURSES_COLOR_T bg = (SP->_color_pairs[pair] & C_MASK); + +#if NCURSES_EXT_FUNCS + if (fg == COLOR_DEFAULT) + fg = -1; + if (bg == COLOR_DEFAULT) + bg = -1; +#endif + + if (f) + *f = fg; + if (b) + *b = bg; + + TR(TRACE_ATTRS, ("...pair_content(%d,%d,%d)", pair, fg, bg)); + result = OK; + } + returnCode(result); } -void _nc_do_color(int pair, bool reverse, int (*outc)(int)) +NCURSES_EXPORT(void) +_nc_do_color(short old_pair, short pair, bool reverse, int (*outc) (int)) { - short fg, bg; + NCURSES_COLOR_T fg = COLOR_DEFAULT; + NCURSES_COLOR_T bg = COLOR_DEFAULT; + NCURSES_COLOR_T old_fg, old_bg; - if (pair == 0) - { - if (orig_pair) - { - TPUTS_TRACE("orig_pair"); - tputs(orig_pair, 1, outc); - } - else if (set_color_pair) - { + if (pair < 0 || pair >= COLOR_PAIRS) { + return; + } else if (pair != 0) { + if (set_color_pair) { TPUTS_TRACE("set_color_pair"); - tputs(tparm(set_color_pair, pair), 1, outc); - } - else - { - set_foreground_color(COLOR_WHITE, outc); - set_background_color(COLOR_BLACK, outc); + tputs(TPARM_1(set_color_pair, pair), 1, outc); + return; + } else if (SP != 0) { + pair_content((short) pair, &fg, &bg); } } - else - { - if (set_color_pair) - { - TPUTS_TRACE("set_color_pair"); - tputs(tparm(set_color_pair, pair), 1, outc); + + if (old_pair >= 0 + && SP != 0 + && pair_content(old_pair, &old_fg, &old_bg) != ERR) { + if ((isDefaultColor(fg) && !isDefaultColor(old_fg)) + || (isDefaultColor(bg) && !isDefaultColor(old_bg))) { +#if NCURSES_EXT_FUNCS + /* + * A minor optimization - but extension. If "AX" is specified in + * the terminal description, treat it as screen's indicator of ECMA + * SGR 39 and SGR 49, and assume the two sequences are independent. + */ + if (SP->_has_sgr_39_49 + && isDefaultColor(old_bg) + && !isDefaultColor(old_fg)) { + tputs("\033[39m", 1, outc); + } else if (SP->_has_sgr_39_49 + && isDefaultColor(old_fg) + && !isDefaultColor(old_bg)) { + tputs("\033[49m", 1, outc); + } else +#endif + reset_color_pair(); } - else - { - pair_content(pair, &fg, &bg); - if (reverse) { - short xx = fg; - fg = bg; - bg = xx; - } + } else { + reset_color_pair(); + if (old_pair < 0) + return; + } - T(("setting colors: pair = %d, fg = %d, bg = %d", pair, fg, bg)); +#if NCURSES_EXT_FUNCS + if (isDefaultColor(fg)) + fg = default_fg(); + if (isDefaultColor(bg)) + bg = default_bg(); +#endif + + if (reverse) { + NCURSES_COLOR_T xx = fg; + fg = bg; + bg = xx; + } - if (fg == C_MASK || bg == C_MASK) - { - if (set_original_colors() != TRUE) - { - if (fg == C_MASK) - set_foreground_color(COLOR_WHITE, outc); - if (bg == C_MASK) - set_background_color(COLOR_BLACK, outc); - } - } - if (fg != C_MASK) - { - set_foreground_color(fg, outc); - } - if (bg != C_MASK) - { - set_background_color(bg, outc); - } - } + TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair, + fg, bg)); + + if (!isDefaultColor(fg)) { + set_foreground_color(fg, outc); + } + if (!isDefaultColor(bg)) { + set_background_color(bg, outc); } }