diff options
Diffstat (limited to 'color.c')
| -rw-r--r-- | color.c | 277 |
1 files changed, 277 insertions, 0 deletions
@@ -0,0 +1,277 @@ +#include "cache.h" +#include "color.h" + +static int git_use_color_default = 0; +int color_stdout_is_tty = -1; + +/* + * The list of available column colors. + */ +const char *column_colors_ansi[] = { + GIT_COLOR_RED, + GIT_COLOR_GREEN, + GIT_COLOR_YELLOW, + GIT_COLOR_BLUE, + GIT_COLOR_MAGENTA, + GIT_COLOR_CYAN, + GIT_COLOR_BOLD_RED, + GIT_COLOR_BOLD_GREEN, + GIT_COLOR_BOLD_YELLOW, + GIT_COLOR_BOLD_BLUE, + GIT_COLOR_BOLD_MAGENTA, + GIT_COLOR_BOLD_CYAN, + GIT_COLOR_RESET, +}; + +/* Ignore the RESET at the end when giving the size */ +const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1; + +static int parse_color(const char *name, int len) +{ + static const char * const color_names[] = { + "normal", "black", "red", "green", "yellow", + "blue", "magenta", "cyan", "white" + }; + char *end; + int i; + for (i = 0; i < ARRAY_SIZE(color_names); i++) { + const char *str = color_names[i]; + if (!strncasecmp(name, str, len) && !str[len]) + return i - 1; + } + i = strtol(name, &end, 10); + if (end - name == len && i >= -1 && i <= 255) + return i; + return -2; +} + +static int parse_attr(const char *name, int len) +{ + static const int attr_values[] = { 1, 2, 4, 5, 7 }; + static const char * const attr_names[] = { + "bold", "dim", "ul", "blink", "reverse" + }; + int i; + for (i = 0; i < ARRAY_SIZE(attr_names); i++) { + const char *str = attr_names[i]; + if (!strncasecmp(name, str, len) && !str[len]) + return attr_values[i]; + } + return -1; +} + +void color_parse(const char *value, const char *var, char *dst) +{ + color_parse_mem(value, strlen(value), var, dst); +} + +void color_parse_mem(const char *value, int value_len, const char *var, + char *dst) +{ + const char *ptr = value; + int len = value_len; + unsigned int attr = 0; + int fg = -2; + int bg = -2; + + if (!strncasecmp(value, "reset", len)) { + strcpy(dst, GIT_COLOR_RESET); + return; + } + + /* [fg [bg]] [attr]... */ + while (len > 0) { + const char *word = ptr; + int val, wordlen = 0; + + while (len > 0 && !isspace(word[wordlen])) { + wordlen++; + len--; + } + + ptr = word + wordlen; + while (len > 0 && isspace(*ptr)) { + ptr++; + len--; + } + + val = parse_color(word, wordlen); + if (val >= -1) { + if (fg == -2) { + fg = val; + continue; + } + if (bg == -2) { + bg = val; + continue; + } + goto bad; + } + val = parse_attr(word, wordlen); + if (0 <= val) + attr |= (1 << val); + else + goto bad; + } + + if (attr || fg >= 0 || bg >= 0) { + int sep = 0; + int i; + + *dst++ = '\033'; + *dst++ = '['; + + for (i = 0; attr; i++) { + unsigned bit = (1 << i); + if (!(attr & bit)) + continue; + attr &= ~bit; + if (sep++) + *dst++ = ';'; + *dst++ = '0' + i; + } + if (fg >= 0) { + if (sep++) + *dst++ = ';'; + if (fg < 8) { + *dst++ = '3'; + *dst++ = '0' + fg; + } else { + dst += sprintf(dst, "38;5;%d", fg); + } + } + if (bg >= 0) { + if (sep++) + *dst++ = ';'; + if (bg < 8) { + *dst++ = '4'; + *dst++ = '0' + bg; + } else { + dst += sprintf(dst, "48;5;%d", bg); + } + } + *dst++ = 'm'; + } + *dst = 0; + return; +bad: + die("bad color value '%.*s' for variable '%s'", value_len, value, var); +} + +int git_config_colorbool(const char *var, const char *value) +{ + if (value) { + if (!strcasecmp(value, "never")) + return 0; + if (!strcasecmp(value, "always")) + return 1; + if (!strcasecmp(value, "auto")) + return GIT_COLOR_AUTO; + } + + if (!var) + return -1; + + /* Missing or explicit false to turn off colorization */ + if (!git_config_bool(var, value)) + return 0; + + /* any normal truth value defaults to 'auto' */ + return GIT_COLOR_AUTO; +} + +static int check_auto_color(void) +{ + if (color_stdout_is_tty < 0) + color_stdout_is_tty = isatty(1); + if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) { + char *term = getenv("TERM"); + if (term && strcmp(term, "dumb")) + return 1; + } + return 0; +} + +int want_color(int var) +{ + static int want_auto = -1; + + if (var < 0) + var = git_use_color_default; + + if (var == GIT_COLOR_AUTO) { + if (want_auto < 0) + want_auto = check_auto_color(); + return want_auto; + } + return var; +} + +int git_color_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "color.ui")) { + git_use_color_default = git_config_colorbool(var, value); + return 0; + } + + return 0; +} + +int git_color_default_config(const char *var, const char *value, void *cb) +{ + if (git_color_config(var, value, cb) < 0) + return -1; + + return git_default_config(var, value, cb); +} + +void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb) +{ + if (*color) + fprintf(fp, "%s", color); + fprintf(fp, "%s", sb->buf); + if (*color) + fprintf(fp, "%s", GIT_COLOR_RESET); +} + +static int color_vfprintf(FILE *fp, const char *color, const char *fmt, + va_list args, const char *trail) +{ + int r = 0; + + if (*color) + r += fprintf(fp, "%s", color); + r += vfprintf(fp, fmt, args); + if (*color) + r += fprintf(fp, "%s", GIT_COLOR_RESET); + if (trail) + r += fprintf(fp, "%s", trail); + return r; +} + + + +int color_fprintf(FILE *fp, const char *color, const char *fmt, ...) +{ + va_list args; + int r; + va_start(args, fmt); + r = color_vfprintf(fp, color, fmt, args, NULL); + va_end(args); + return r; +} + +int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...) +{ + va_list args; + int r; + va_start(args, fmt); + r = color_vfprintf(fp, color, fmt, args, "\n"); + va_end(args); + return r; +} + +int color_is_nil(const char *c) +{ + return !strcmp(c, "NIL"); +} |