Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "color.h"
   3
   4static int git_use_color_default = 0;
   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
  63void color_parse(const char *value, const char *var, char *dst)
  64{
  65        color_parse_mem(value, strlen(value), var, dst);
  66}
  67
  68void color_parse_mem(const char *value, int value_len, const char *var,
  69                char *dst)
  70{
  71        const char *ptr = value;
  72        int len = value_len;
  73        unsigned int attr = 0;
  74        int fg = -2;
  75        int bg = -2;
  76
  77        if (!strncasecmp(value, "reset", len)) {
  78                strcpy(dst, GIT_COLOR_RESET);
  79                return;
  80        }
  81
  82        /* [fg [bg]] [attr]... */
  83        while (len > 0) {
  84                const char *word = ptr;
  85                int val, wordlen = 0;
  86
  87                while (len > 0 && !isspace(word[wordlen])) {
  88                        wordlen++;
  89                        len--;
  90                }
  91
  92                ptr = word + wordlen;
  93                while (len > 0 && isspace(*ptr)) {
  94                        ptr++;
  95                        len--;
  96                }
  97
  98                val = parse_color(word, wordlen);
  99                if (val >= -1) {
 100                        if (fg == -2) {
 101                                fg = val;
 102                                continue;
 103                        }
 104                        if (bg == -2) {
 105                                bg = val;
 106                                continue;
 107                        }
 108                        goto bad;
 109                }
 110                val = parse_attr(word, wordlen);
 111                if (0 <= val)
 112                        attr |= (1 << val);
 113                else
 114                        goto bad;
 115        }
 116
 117        if (attr || fg >= 0 || bg >= 0) {
 118                int sep = 0;
 119                int i;
 120
 121                *dst++ = '\033';
 122                *dst++ = '[';
 123
 124                for (i = 0; attr; i++) {
 125                        unsigned bit = (1 << i);
 126                        if (!(attr & bit))
 127                                continue;
 128                        attr &= ~bit;
 129                        if (sep++)
 130                                *dst++ = ';';
 131                        *dst++ = '0' + i;
 132                }
 133                if (fg >= 0) {
 134                        if (sep++)
 135                                *dst++ = ';';
 136                        if (fg < 8) {
 137                                *dst++ = '3';
 138                                *dst++ = '0' + fg;
 139                        } else {
 140                                dst += sprintf(dst, "38;5;%d", fg);
 141                        }
 142                }
 143                if (bg >= 0) {
 144                        if (sep++)
 145                                *dst++ = ';';
 146                        if (bg < 8) {
 147                                *dst++ = '4';
 148                                *dst++ = '0' + bg;
 149                        } else {
 150                                dst += sprintf(dst, "48;5;%d", bg);
 151                        }
 152                }
 153                *dst++ = 'm';
 154        }
 155        *dst = 0;
 156        return;
 157bad:
 158        die("bad color value '%.*s' for variable '%s'", value_len, value, var);
 159}
 160
 161int git_config_colorbool(const char *var, const char *value)
 162{
 163        if (value) {
 164                if (!strcasecmp(value, "never"))
 165                        return 0;
 166                if (!strcasecmp(value, "always"))
 167                        return 1;
 168                if (!strcasecmp(value, "auto"))
 169                        return GIT_COLOR_AUTO;
 170        }
 171
 172        if (!var)
 173                return -1;
 174
 175        /* Missing or explicit false to turn off colorization */
 176        if (!git_config_bool(var, value))
 177                return 0;
 178
 179        /* any normal truth value defaults to 'auto' */
 180        return GIT_COLOR_AUTO;
 181}
 182
 183static int check_auto_color(void)
 184{
 185        if (color_stdout_is_tty < 0)
 186                color_stdout_is_tty = isatty(1);
 187        if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
 188                char *term = getenv("TERM");
 189                if (term && strcmp(term, "dumb"))
 190                        return 1;
 191        }
 192        return 0;
 193}
 194
 195int want_color(int var)
 196{
 197        static int want_auto = -1;
 198
 199        if (var < 0)
 200                var = git_use_color_default;
 201
 202        if (var == GIT_COLOR_AUTO) {
 203                if (want_auto < 0)
 204                        want_auto = check_auto_color();
 205                return want_auto;
 206        }
 207        return var;
 208}
 209
 210int git_color_config(const char *var, const char *value, void *cb)
 211{
 212        if (!strcmp(var, "color.ui")) {
 213                git_use_color_default = git_config_colorbool(var, value);
 214                return 0;
 215        }
 216
 217        return 0;
 218}
 219
 220int git_color_default_config(const char *var, const char *value, void *cb)
 221{
 222        if (git_color_config(var, value, cb) < 0)
 223                return -1;
 224
 225        return git_default_config(var, value, cb);
 226}
 227
 228void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
 229{
 230        if (*color)
 231                fprintf(fp, "%s", color);
 232        fprintf(fp, "%s", sb->buf);
 233        if (*color)
 234                fprintf(fp, "%s", GIT_COLOR_RESET);
 235}
 236
 237static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
 238                va_list args, const char *trail)
 239{
 240        int r = 0;
 241
 242        if (*color)
 243                r += fprintf(fp, "%s", color);
 244        r += vfprintf(fp, fmt, args);
 245        if (*color)
 246                r += fprintf(fp, "%s", GIT_COLOR_RESET);
 247        if (trail)
 248                r += fprintf(fp, "%s", trail);
 249        return r;
 250}
 251
 252
 253
 254int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
 255{
 256        va_list args;
 257        int r;
 258        va_start(args, fmt);
 259        r = color_vfprintf(fp, color, fmt, args, NULL);
 260        va_end(args);
 261        return r;
 262}
 263
 264int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
 265{
 266        va_list args;
 267        int r;
 268        va_start(args, fmt);
 269        r = color_vfprintf(fp, color, fmt, args, "\n");
 270        va_end(args);
 271        return r;
 272}
 273
 274int color_is_nil(const char *c)
 275{
 276        return !strcmp(c, "NIL");
 277}