Start preparing for 1.8.4.2
[alt-git.git] / color.c
blobf672885b71acef4108c8cefc9cf887c220f614d3
1 #include "cache.h"
2 #include "color.h"
4 static int git_use_color_default = GIT_COLOR_AUTO;
5 int color_stdout_is_tty = -1;
7 /*
8 * The list of available column colors.
9 */
10 const 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,
26 /* Ignore the RESET at the end when giving the size */
27 const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
29 static int parse_color(const char *name, int len)
31 static const char * const color_names[] = {
32 "normal", "black", "red", "green", "yellow",
33 "blue", "magenta", "cyan", "white"
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;
42 i = strtol(name, &end, 10);
43 if (end - name == len && i >= -1 && i <= 255)
44 return i;
45 return -2;
48 static int parse_attr(const char *name, int len)
50 static const int attr_values[] = { 1, 2, 4, 5, 7 };
51 static const char * const attr_names[] = {
52 "bold", "dim", "ul", "blink", "reverse"
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];
60 return -1;
63 void color_parse(const char *value, const char *var, char *dst)
65 color_parse_mem(value, strlen(value), var, dst);
68 void color_parse_mem(const char *value, int value_len, const char *var,
69 char *dst)
71 const char *ptr = value;
72 int len = value_len;
73 unsigned int attr = 0;
74 int fg = -2;
75 int bg = -2;
77 if (!strncasecmp(value, "reset", len)) {
78 strcpy(dst, GIT_COLOR_RESET);
79 return;
82 /* [fg [bg]] [attr]... */
83 while (len > 0) {
84 const char *word = ptr;
85 int val, wordlen = 0;
87 while (len > 0 && !isspace(word[wordlen])) {
88 wordlen++;
89 len--;
92 ptr = word + wordlen;
93 while (len > 0 && isspace(*ptr)) {
94 ptr++;
95 len--;
98 val = parse_color(word, wordlen);
99 if (val >= -1) {
100 if (fg == -2) {
101 fg = val;
102 continue;
104 if (bg == -2) {
105 bg = val;
106 continue;
108 goto bad;
110 val = parse_attr(word, wordlen);
111 if (0 <= val)
112 attr |= (1 << val);
113 else
114 goto bad;
117 if (attr || fg >= 0 || bg >= 0) {
118 int sep = 0;
119 int i;
121 *dst++ = '\033';
122 *dst++ = '[';
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;
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);
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);
153 *dst++ = 'm';
155 *dst = 0;
156 return;
157 bad:
158 die("bad color value '%.*s' for variable '%s'", value_len, value, var);
161 int git_config_colorbool(const char *var, const char *value)
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;
172 if (!var)
173 return -1;
175 /* Missing or explicit false to turn off colorization */
176 if (!git_config_bool(var, value))
177 return 0;
179 /* any normal truth value defaults to 'auto' */
180 return GIT_COLOR_AUTO;
183 static int check_auto_color(void)
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;
192 return 0;
195 int want_color(int var)
197 static int want_auto = -1;
199 if (var < 0)
200 var = git_use_color_default;
202 if (var == GIT_COLOR_AUTO) {
203 if (want_auto < 0)
204 want_auto = check_auto_color();
205 return want_auto;
207 return var;
210 int git_color_config(const char *var, const char *value, void *cb)
212 if (!strcmp(var, "color.ui")) {
213 git_use_color_default = git_config_colorbool(var, value);
214 return 0;
217 return 0;
220 int git_color_default_config(const char *var, const char *value, void *cb)
222 if (git_color_config(var, value, cb) < 0)
223 return -1;
225 return git_default_config(var, value, cb);
228 void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
230 if (*color)
231 fprintf(fp, "%s", color);
232 fprintf(fp, "%s", sb->buf);
233 if (*color)
234 fprintf(fp, "%s", GIT_COLOR_RESET);
237 static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
238 va_list args, const char *trail)
240 int r = 0;
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;
254 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
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;
264 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
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;
274 int color_is_nil(const char *c)
276 return !strcmp(c, "NIL");