/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * Copyright (c) 1998,1999,2000 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 *
/* lib_color.c
*
* Handles color emulation of SYS V curses
- *
*/
#include <curses.priv.h>
#include <term.h>
+#include <tic.h>
-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 1.53 2000/09/02 18:02:15 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;
+int COLOR_PAIRS = 0;
+int COLORS = 0;
/*
* Given a RGB range of 0..1000, we'll normally set the individual values
*/
#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 */
+ {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 */
};
+
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 */
+ { 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 */
};
+/* *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(set_a_background, bg), 1, outc);
+ } else {
+ TPUTS_TRACE("set_background");
+ tputs(tparm(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(set_a_foreground, fg), 1, outc);
+ } else {
+ TPUTS_TRACE("set_foreground");
+ tputs(tparm(set_foreground, toggled_colors(fg)), 1, outc);
+ }
}
-static bool set_original_colors(void)
+static bool
+set_original_colors(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;
- }
- return FALSE;
+ 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;
+ }
+ return FALSE;
}
-int start_color(void)
+int
+start_color(void)
{
- T((T_CALLED("start_color()")));
+ int n;
+ const color_t *tp;
+
+ T((T_CALLED("start_color()")));
- if (set_original_colors() != TRUE)
- {
- set_foreground_color(COLOR_WHITE, _nc_outch);
- set_background_color(COLOR_BLACK, _nc_outch);
+ if (set_original_colors() != TRUE) {
+ set_foreground_color(default_fg(), _nc_outch);
+ set_background_color(default_bg(), _nc_outch);
+ }
+
+ if (VALID_NUMERIC(max_pairs))
+ 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(default_fg(), default_bg());
+ if (VALID_NUMERIC(max_colors))
+ COLORS = SP->_color_count = max_colors;
+ else
+ returnCode(ERR);
+ SP->_coloron = 1;
+
+ if ((SP->_color_table = typeMalloc(color_t, COLORS)) == 0)
+ returnCode(ERR);
+ tp = (hue_lightness_saturation) ? hls_palette : cga_palette;
+ for (n = 0; n < COLORS; n++) {
+ if (n < 8) {
+ SP->_color_table[n] = tp[n];
+ } else {
+ SP->_color_table[n] = tp[n % 8];
+ 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;
+ }
}
+ }
- 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);
+ T(("started color: COLORS = %d, COLOR_PAIRS = %d", COLORS, COLOR_PAIRS));
+
+ returnCode(OK);
}
/* This function was originally written by Daniel Weaver <danw@znyx.com> */
-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;
/* 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;
}
* Extension (1997/1/18) - Allow negative f/b values to set default color
* values.
*/
-int init_pair(short pair, short f, short b)
+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
+ unsigned result;
+
+ T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b));
+
+ if ((pair < 0) || (pair >= COLOR_PAIRS))
+ returnCode(ERR);
+#if NCURSES_EXT_FUNCS
+ 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
+#endif
+ {
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;
- }
+ || (b < 0) || (b >= COLORS)
+ || (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;
+ 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;
}
- if (changed)
- _nc_make_oldhash(y);
}
+ 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));
- }
+ }
+ SP->_color_pairs[pair] = result;
+ if ((int) (SP->_current_attr & A_COLOR) == COLOR_PAIR(pair))
+ SP->_current_attr |= A_COLOR; /* force attribute update */
+
+ 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));
}
+ }
- returnCode(OK);
+ returnCode(OK);
}
-int init_color(short color, short r, short g, short b)
+int
+init_color(short color, short r, short g, short b)
{
- T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b));
-
- if (initialize_color == NULL)
- returnCode(ERR);
-
- if (color < 0 || color >= COLORS)
- returnCode(ERR);
- if (r < 0 || r > 1000 || g < 0 || g > 1000 || b < 0 || b > 1000)
- returnCode(ERR);
-
- 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;
- }
+ T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b));
- if (initialize_color)
- {
- TPUTS_TRACE("initialize_color");
- putp(tparm(initialize_color, color, r, g, b));
- }
- returnCode(OK);
+ if (initialize_color == NULL)
+ returnCode(ERR);
+
+ if (color < 0 || color >= COLORS)
+ returnCode(ERR);
+ if (r < 0 || r > 1000 || g < 0 || g > 1000 || b < 0 || b > 1000)
+ returnCode(ERR);
+
+ 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;
+ }
+
+ if (initialize_color) {
+ TPUTS_TRACE("initialize_color");
+ putp(tparm(initialize_color, color, r, g, b));
+ }
+ returnCode(OK);
}
-bool can_change_color(void)
+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)
+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)
+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);
- if (r) *r = SP->_color_table[color].red;
- if (g) *g = SP->_color_table[color].green;
- if (b) *b = SP->_color_table[color].blue;
+ 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);
}
-int pair_content(short pair, short *f, short *b)
+int
+pair_content(short pair, short *f, short *b)
{
- T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, 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);
+ 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);
+ returnCode(OK);
}
-void _nc_do_color(int pair, bool reverse, int (*outc)(int))
+void
+_nc_do_color(int old_pair, int pair, bool reverse, int (*outc) (int))
{
- short fg, bg;
+ NCURSES_COLOR_T fg = C_MASK, bg = C_MASK;
+ 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);
+ return;
+ } else if (SP != 0) {
+ pair_content(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);
+ if ((fg == C_MASK && old_fg != C_MASK)
+ || (bg == C_MASK && old_bg != C_MASK)) {
+#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 && old_bg == C_MASK && old_fg != C_MASK) {
+ tputs("\033[39m", 1, outc);
+ } else if (SP->_has_sgr_39_49 && old_fg == C_MASK && old_bg != C_MASK) {
+ tputs("\033[49m", 1, outc);
+ } else
+#endif
+ set_original_colors();
}
- else
- {
- pair_content(pair, &fg, &bg);
- if (reverse) {
- short xx = fg;
- fg = bg;
- bg = xx;
- }
+ } else {
+ set_original_colors();
+ if (old_pair < 0)
+ return;
+ }
- T(("setting colors: pair = %d, fg = %d, bg = %d", pair, fg, bg));
+#if NCURSES_EXT_FUNCS
+ if (fg == C_MASK)
+ fg = default_fg();
+ if (bg == C_MASK)
+ 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 (fg != C_MASK) {
+ set_foreground_color(fg, outc);
+ }
+ if (bg != C_MASK) {
+ set_background_color(bg, outc);
}
}
projects / ncurses.git / blobdiff