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![Jeff King](/assets/img/avatar_default.png)
All of the "do we want color" flags default to -1 to indicate that we don't have any color configured. This value is handled in one of two ways: 1. In porcelain, we check early on whether the value is still -1 after reading the config, and set it to the value of color.ui (which defaults to 0). 2. In plumbing, it stays untouched as -1, and want_color defaults it to off. This works fine, but means that every porcelain has to check and reassign its color flag. Now that want_color gives us a place to put this check in a single spot, we can do that, simplifying the calling code. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
278 lines
5.2 KiB
C
278 lines
5.2 KiB
C
#include "cache.h"
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#include "color.h"
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static int git_use_color_default = 0;
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int color_stdout_is_tty = -1;
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/*
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* The list of available column colors.
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*/
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const char *column_colors_ansi[] = {
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GIT_COLOR_RED,
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GIT_COLOR_GREEN,
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GIT_COLOR_YELLOW,
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GIT_COLOR_BLUE,
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GIT_COLOR_MAGENTA,
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GIT_COLOR_CYAN,
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GIT_COLOR_BOLD_RED,
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GIT_COLOR_BOLD_GREEN,
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GIT_COLOR_BOLD_YELLOW,
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GIT_COLOR_BOLD_BLUE,
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GIT_COLOR_BOLD_MAGENTA,
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GIT_COLOR_BOLD_CYAN,
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GIT_COLOR_RESET,
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};
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/* Ignore the RESET at the end when giving the size */
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const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
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static int parse_color(const char *name, int len)
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{
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static const char * const color_names[] = {
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"normal", "black", "red", "green", "yellow",
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"blue", "magenta", "cyan", "white"
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};
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char *end;
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int i;
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for (i = 0; i < ARRAY_SIZE(color_names); i++) {
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const char *str = color_names[i];
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if (!strncasecmp(name, str, len) && !str[len])
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return i - 1;
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}
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i = strtol(name, &end, 10);
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if (end - name == len && i >= -1 && i <= 255)
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return i;
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return -2;
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}
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static int parse_attr(const char *name, int len)
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{
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static const int attr_values[] = { 1, 2, 4, 5, 7 };
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static const char * const attr_names[] = {
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"bold", "dim", "ul", "blink", "reverse"
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};
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int i;
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for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
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const char *str = attr_names[i];
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if (!strncasecmp(name, str, len) && !str[len])
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return attr_values[i];
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}
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return -1;
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}
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void color_parse(const char *value, const char *var, char *dst)
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{
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color_parse_mem(value, strlen(value), var, dst);
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}
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void color_parse_mem(const char *value, int value_len, const char *var,
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char *dst)
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{
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const char *ptr = value;
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int len = value_len;
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unsigned int attr = 0;
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int fg = -2;
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int bg = -2;
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if (!strncasecmp(value, "reset", len)) {
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strcpy(dst, GIT_COLOR_RESET);
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return;
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}
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/* [fg [bg]] [attr]... */
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while (len > 0) {
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const char *word = ptr;
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int val, wordlen = 0;
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while (len > 0 && !isspace(word[wordlen])) {
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wordlen++;
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len--;
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}
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ptr = word + wordlen;
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while (len > 0 && isspace(*ptr)) {
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ptr++;
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len--;
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}
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val = parse_color(word, wordlen);
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if (val >= -1) {
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if (fg == -2) {
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fg = val;
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continue;
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}
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if (bg == -2) {
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bg = val;
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continue;
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}
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goto bad;
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}
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val = parse_attr(word, wordlen);
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if (0 <= val)
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attr |= (1 << val);
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else
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goto bad;
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}
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if (attr || fg >= 0 || bg >= 0) {
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int sep = 0;
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int i;
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*dst++ = '\033';
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*dst++ = '[';
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for (i = 0; attr; i++) {
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unsigned bit = (1 << i);
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if (!(attr & bit))
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continue;
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attr &= ~bit;
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if (sep++)
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*dst++ = ';';
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*dst++ = '0' + i;
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}
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if (fg >= 0) {
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if (sep++)
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*dst++ = ';';
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if (fg < 8) {
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*dst++ = '3';
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*dst++ = '0' + fg;
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} else {
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dst += sprintf(dst, "38;5;%d", fg);
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}
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}
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if (bg >= 0) {
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if (sep++)
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*dst++ = ';';
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if (bg < 8) {
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*dst++ = '4';
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*dst++ = '0' + bg;
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} else {
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dst += sprintf(dst, "48;5;%d", bg);
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}
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}
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*dst++ = 'm';
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}
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*dst = 0;
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return;
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bad:
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die("bad color value '%.*s' for variable '%s'", value_len, value, var);
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}
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int git_config_colorbool(const char *var, const char *value)
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{
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if (value) {
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if (!strcasecmp(value, "never"))
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return 0;
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if (!strcasecmp(value, "always"))
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return 1;
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if (!strcasecmp(value, "auto"))
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return GIT_COLOR_AUTO;
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}
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if (!var)
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return -1;
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/* Missing or explicit false to turn off colorization */
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if (!git_config_bool(var, value))
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return 0;
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/* any normal truth value defaults to 'auto' */
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return GIT_COLOR_AUTO;
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}
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static int check_auto_color(void)
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{
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if (color_stdout_is_tty < 0)
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color_stdout_is_tty = isatty(1);
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if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
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char *term = getenv("TERM");
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if (term && strcmp(term, "dumb"))
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return 1;
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}
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return 0;
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}
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int want_color(int var)
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{
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static int want_auto = -1;
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if (var < 0)
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var = git_use_color_default;
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if (var == GIT_COLOR_AUTO) {
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if (want_auto < 0)
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want_auto = check_auto_color();
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return want_auto;
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}
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return var;
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}
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int git_color_config(const char *var, const char *value, void *cb)
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{
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if (!strcmp(var, "color.ui")) {
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git_use_color_default = git_config_colorbool(var, value);
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return 0;
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}
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return 0;
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}
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int git_color_default_config(const char *var, const char *value, void *cb)
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{
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if (git_color_config(var, value, cb) < 0)
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return -1;
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return git_default_config(var, value, cb);
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}
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void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
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{
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if (*color)
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fprintf(fp, "%s", color);
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fprintf(fp, "%s", sb->buf);
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if (*color)
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fprintf(fp, "%s", GIT_COLOR_RESET);
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}
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static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
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va_list args, const char *trail)
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{
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int r = 0;
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if (*color)
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r += fprintf(fp, "%s", color);
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r += vfprintf(fp, fmt, args);
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if (*color)
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r += fprintf(fp, "%s", GIT_COLOR_RESET);
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if (trail)
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r += fprintf(fp, "%s", trail);
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return r;
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}
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int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vfprintf(fp, color, fmt, args, NULL);
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va_end(args);
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return r;
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}
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int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
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{
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va_list args;
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int r;
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va_start(args, fmt);
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r = color_vfprintf(fp, color, fmt, args, "\n");
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va_end(args);
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return r;
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}
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int color_is_nil(const char *c)
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{
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return !strcmp(c, "NIL");
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}
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