Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "color.h"
   3
   4static int git_use_color_default = GIT_COLOR_AUTO;
   5int color_stdout_is_tty = -1;
   6
   7/*
   8 * The list of available column colors.
   9 */
  10const char *column_colors_ansi[] = {
  11        GIT_COLOR_RED,
  12        GIT_COLOR_GREEN,
  13        GIT_COLOR_YELLOW,
  14        GIT_COLOR_BLUE,
  15        GIT_COLOR_MAGENTA,
  16        GIT_COLOR_CYAN,
  17        GIT_COLOR_BOLD_RED,
  18        GIT_COLOR_BOLD_GREEN,
  19        GIT_COLOR_BOLD_YELLOW,
  20        GIT_COLOR_BOLD_BLUE,
  21        GIT_COLOR_BOLD_MAGENTA,
  22        GIT_COLOR_BOLD_CYAN,
  23        GIT_COLOR_RESET,
  24};
  25
  26/* Ignore the RESET at the end when giving the size */
  27const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
  28
  29static int parse_color(const char *name, int len)
  30{
  31        static const char * const color_names[] = {
  32                "normal", "black", "red", "green", "yellow",
  33                "blue", "magenta", "cyan", "white"
  34        };
  35        char *end;
  36        int i;
  37        for (i = 0; i < ARRAY_SIZE(color_names); i++) {
  38                const char *str = color_names[i];
  39                if (!strncasecmp(name, str, len) && !str[len])
  40                        return i - 1;
  41        }
  42        i = strtol(name, &end, 10);
  43        if (end - name == len && i >= -1 && i <= 255)
  44                return i;
  45        return -2;
  46}
  47
  48static int parse_attr(const char *name, int len)
  49{
  50        static const int attr_values[] = { 1, 2, 4, 5, 7 };
  51        static const char * const attr_names[] = {
  52                "bold", "dim", "ul", "blink", "reverse"
  53        };
  54        int i;
  55        for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
  56                const char *str = attr_names[i];
  57                if (!strncasecmp(name, str, len) && !str[len])
  58                        return attr_values[i];
  59        }
  60        return -1;
  61}
  62
  63int color_parse(const char *value, char *dst)
  64{
  65        return color_parse_mem(value, strlen(value), dst);
  66}
  67
  68int color_parse_mem(const char *value, int value_len, char *dst)
  69{
  70        const char *ptr = value;
  71        int len = value_len;
  72        unsigned int attr = 0;
  73        int fg = -2;
  74        int bg = -2;
  75
  76        if (!strncasecmp(value, "reset", len)) {
  77                strcpy(dst, GIT_COLOR_RESET);
  78                return 0;
  79        }
  80
  81        /* [fg [bg]] [attr]... */
  82        while (len > 0) {
  83                const char *word = ptr;
  84                int val, wordlen = 0;
  85
  86                while (len > 0 && !isspace(word[wordlen])) {
  87                        wordlen++;
  88                        len--;
  89                }
  90
  91                ptr = word + wordlen;
  92                while (len > 0 && isspace(*ptr)) {
  93                        ptr++;
  94                        len--;
  95                }
  96
  97                val = parse_color(word, wordlen);
  98                if (val >= -1) {
  99                        if (fg == -2) {
 100                                fg = val;
 101                                continue;
 102                        }
 103                        if (bg == -2) {
 104                                bg = val;
 105                                continue;
 106                        }
 107                        goto bad;
 108                }
 109                val = parse_attr(word, wordlen);
 110                if (0 <= val)
 111                        attr |= (1 << val);
 112                else
 113                        goto bad;
 114        }
 115
 116        if (attr || fg >= 0 || bg >= 0) {
 117                int sep = 0;
 118                int i;
 119
 120                *dst++ = '\033';
 121                *dst++ = '[';
 122
 123                for (i = 0; attr; i++) {
 124                        unsigned bit = (1 << i);
 125                        if (!(attr & bit))
 126                                continue;
 127                        attr &= ~bit;
 128                        if (sep++)
 129                                *dst++ = ';';
 130                        *dst++ = '0' + i;
 131                }
 132                if (fg >= 0) {
 133                        if (sep++)
 134                                *dst++ = ';';
 135                        if (fg < 8) {
 136                                *dst++ = '3';
 137                                *dst++ = '0' + fg;
 138                        } else {
 139                                dst += sprintf(dst, "38;5;%d", fg);
 140                        }
 141                }
 142                if (bg >= 0) {
 143                        if (sep++)
 144                                *dst++ = ';';
 145                        if (bg < 8) {
 146                                *dst++ = '4';
 147                                *dst++ = '0' + bg;
 148                        } else {
 149                                dst += sprintf(dst, "48;5;%d", bg);
 150                        }
 151                }
 152                *dst++ = 'm';
 153        }
 154        *dst = 0;
 155        return 0;
 156bad:
 157        return error(_("invalid color value: %.*s"), value_len, value);
 158}
 159
 160int git_config_colorbool(const char *var, const char *value)
 161{
 162        if (value) {
 163                if (!strcasecmp(value, "never"))
 164                        return 0;
 165                if (!strcasecmp(value, "always"))
 166                        return 1;
 167                if (!strcasecmp(value, "auto"))
 168                        return GIT_COLOR_AUTO;
 169        }
 170
 171        if (!var)
 172                return -1;
 173
 174        /* Missing or explicit false to turn off colorization */
 175        if (!git_config_bool(var, value))
 176                return 0;
 177
 178        /* any normal truth value defaults to 'auto' */
 179        return GIT_COLOR_AUTO;
 180}
 181
 182static int check_auto_color(void)
 183{
 184        if (color_stdout_is_tty < 0)
 185                color_stdout_is_tty = isatty(1);
 186        if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
 187                char *term = getenv("TERM");
 188                if (term && strcmp(term, "dumb"))
 189                        return 1;
 190        }
 191        return 0;
 192}
 193
 194int want_color(int var)
 195{
 196        static int want_auto = -1;
 197
 198        if (var < 0)
 199                var = git_use_color_default;
 200
 201        if (var == GIT_COLOR_AUTO) {
 202                if (want_auto < 0)
 203                        want_auto = check_auto_color();
 204                return want_auto;
 205        }
 206        return var;
 207}
 208
 209int git_color_config(const char *var, const char *value, void *cb)
 210{
 211        if (!strcmp(var, "color.ui")) {
 212                git_use_color_default = git_config_colorbool(var, value);
 213                return 0;
 214        }
 215
 216        return 0;
 217}
 218
 219int git_color_default_config(const char *var, const char *value, void *cb)
 220{
 221        if (git_color_config(var, value, cb) < 0)
 222                return -1;
 223
 224        return git_default_config(var, value, cb);
 225}
 226
 227void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
 228{
 229        if (*color)
 230                fprintf(fp, "%s", color);
 231        fprintf(fp, "%s", sb->buf);
 232        if (*color)
 233                fprintf(fp, "%s", GIT_COLOR_RESET);
 234}
 235
 236static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
 237                va_list args, const char *trail)
 238{
 239        int r = 0;
 240
 241        if (*color)
 242                r += fprintf(fp, "%s", color);
 243        r += vfprintf(fp, fmt, args);
 244        if (*color)
 245                r += fprintf(fp, "%s", GIT_COLOR_RESET);
 246        if (trail)
 247                r += fprintf(fp, "%s", trail);
 248        return r;
 249}
 250
 251
 252
 253int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
 254{
 255        va_list args;
 256        int r;
 257        va_start(args, fmt);
 258        r = color_vfprintf(fp, color, fmt, args, NULL);
 259        va_end(args);
 260        return r;
 261}
 262
 263int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
 264{
 265        va_list args;
 266        int r;
 267        va_start(args, fmt);
 268        r = color_vfprintf(fp, color, fmt, args, "\n");
 269        va_end(args);
 270        return r;
 271}
 272
 273int color_is_nil(const char *c)
 274{
 275        return !strcmp(c, "NIL");
 276}