]>
Commit | Line | Data |
---|---|---|
1 | #include "cache.h" | |
2 | #include "color.h" | |
3 | ||
4 | static int git_use_color_default = GIT_COLOR_AUTO; | |
5 | int color_stdout_is_tty = -1; | |
6 | ||
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, | |
24 | }; | |
25 | ||
26 | /* Ignore the RESET at the end when giving the size */ | |
27 | const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1; | |
28 | ||
29 | /* An individual foreground or background color. */ | |
30 | struct color { | |
31 | enum { | |
32 | COLOR_UNSPECIFIED = 0, | |
33 | COLOR_NORMAL, | |
34 | COLOR_ANSI, /* basic 0-7 ANSI colors */ | |
35 | COLOR_256, | |
36 | COLOR_RGB | |
37 | } type; | |
38 | /* The numeric value for ANSI and 256-color modes */ | |
39 | unsigned char value; | |
40 | /* 24-bit RGB color values */ | |
41 | unsigned char red, green, blue; | |
42 | }; | |
43 | ||
44 | /* | |
45 | * "word" is a buffer of length "len"; does it match the NUL-terminated | |
46 | * "match" exactly? | |
47 | */ | |
48 | static int match_word(const char *word, int len, const char *match) | |
49 | { | |
50 | return !strncasecmp(word, match, len) && !match[len]; | |
51 | } | |
52 | ||
53 | static int get_hex_color(const char *in, unsigned char *out) | |
54 | { | |
55 | unsigned int val; | |
56 | val = (hexval(in[0]) << 4) | hexval(in[1]); | |
57 | if (val & ~0xff) | |
58 | return -1; | |
59 | *out = val; | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int parse_color(struct color *out, const char *name, int len) | |
64 | { | |
65 | /* Positions in array must match ANSI color codes */ | |
66 | static const char * const color_names[] = { | |
67 | "black", "red", "green", "yellow", | |
68 | "blue", "magenta", "cyan", "white" | |
69 | }; | |
70 | char *end; | |
71 | int i; | |
72 | long val; | |
73 | ||
74 | /* First try the special word "normal"... */ | |
75 | if (match_word(name, len, "normal")) { | |
76 | out->type = COLOR_NORMAL; | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* Try a 24-bit RGB value */ | |
81 | if (len == 7 && name[0] == '#') { | |
82 | if (!get_hex_color(name + 1, &out->red) && | |
83 | !get_hex_color(name + 3, &out->green) && | |
84 | !get_hex_color(name + 5, &out->blue)) { | |
85 | out->type = COLOR_RGB; | |
86 | return 0; | |
87 | } | |
88 | } | |
89 | ||
90 | /* Then pick from our human-readable color names... */ | |
91 | for (i = 0; i < ARRAY_SIZE(color_names); i++) { | |
92 | if (match_word(name, len, color_names[i])) { | |
93 | out->type = COLOR_ANSI; | |
94 | out->value = i; | |
95 | return 0; | |
96 | } | |
97 | } | |
98 | ||
99 | /* And finally try a literal 256-color-mode number */ | |
100 | val = strtol(name, &end, 10); | |
101 | if (end - name == len) { | |
102 | /* | |
103 | * Allow "-1" as an alias for "normal", but other negative | |
104 | * numbers are bogus. | |
105 | */ | |
106 | if (val < -1) | |
107 | ; /* fall through to error */ | |
108 | else if (val < 0) { | |
109 | out->type = COLOR_NORMAL; | |
110 | return 0; | |
111 | /* Rewrite low numbers as more-portable standard colors. */ | |
112 | } else if (val < 8) { | |
113 | out->type = COLOR_ANSI; | |
114 | out->value = val; | |
115 | return 0; | |
116 | } else if (val < 256) { | |
117 | out->type = COLOR_256; | |
118 | out->value = val; | |
119 | return 0; | |
120 | } | |
121 | } | |
122 | ||
123 | return -1; | |
124 | } | |
125 | ||
126 | static int parse_attr(const char *name, int len) | |
127 | { | |
128 | static const int attr_values[] = { 1, 2, 4, 5, 7, | |
129 | 22, 22, 24, 25, 27 }; | |
130 | static const char * const attr_names[] = { | |
131 | "bold", "dim", "ul", "blink", "reverse", | |
132 | "nobold", "nodim", "noul", "noblink", "noreverse" | |
133 | }; | |
134 | int i; | |
135 | for (i = 0; i < ARRAY_SIZE(attr_names); i++) { | |
136 | const char *str = attr_names[i]; | |
137 | if (!strncasecmp(name, str, len) && !str[len]) | |
138 | return attr_values[i]; | |
139 | } | |
140 | return -1; | |
141 | } | |
142 | ||
143 | int color_parse(const char *value, char *dst) | |
144 | { | |
145 | return color_parse_mem(value, strlen(value), dst); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Write the ANSI color codes for "c" to "out"; the string should | |
150 | * already have the ANSI escape code in it. "out" should have enough | |
151 | * space in it to fit any color. | |
152 | */ | |
153 | static char *color_output(char *out, const struct color *c, char type) | |
154 | { | |
155 | switch (c->type) { | |
156 | case COLOR_UNSPECIFIED: | |
157 | case COLOR_NORMAL: | |
158 | break; | |
159 | case COLOR_ANSI: | |
160 | *out++ = type; | |
161 | *out++ = '0' + c->value; | |
162 | break; | |
163 | case COLOR_256: | |
164 | out += sprintf(out, "%c8;5;%d", type, c->value); | |
165 | break; | |
166 | case COLOR_RGB: | |
167 | out += sprintf(out, "%c8;2;%d;%d;%d", type, | |
168 | c->red, c->green, c->blue); | |
169 | break; | |
170 | } | |
171 | return out; | |
172 | } | |
173 | ||
174 | static int color_empty(const struct color *c) | |
175 | { | |
176 | return c->type <= COLOR_NORMAL; | |
177 | } | |
178 | ||
179 | int color_parse_mem(const char *value, int value_len, char *dst) | |
180 | { | |
181 | const char *ptr = value; | |
182 | int len = value_len; | |
183 | unsigned int attr = 0; | |
184 | struct color fg = { COLOR_UNSPECIFIED }; | |
185 | struct color bg = { COLOR_UNSPECIFIED }; | |
186 | ||
187 | if (!strncasecmp(value, "reset", len)) { | |
188 | strcpy(dst, GIT_COLOR_RESET); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | /* [fg [bg]] [attr]... */ | |
193 | while (len > 0) { | |
194 | const char *word = ptr; | |
195 | struct color c; | |
196 | int val, wordlen = 0; | |
197 | ||
198 | while (len > 0 && !isspace(word[wordlen])) { | |
199 | wordlen++; | |
200 | len--; | |
201 | } | |
202 | ||
203 | ptr = word + wordlen; | |
204 | while (len > 0 && isspace(*ptr)) { | |
205 | ptr++; | |
206 | len--; | |
207 | } | |
208 | ||
209 | if (!parse_color(&c, word, wordlen)) { | |
210 | if (fg.type == COLOR_UNSPECIFIED) { | |
211 | fg = c; | |
212 | continue; | |
213 | } | |
214 | if (bg.type == COLOR_UNSPECIFIED) { | |
215 | bg = c; | |
216 | continue; | |
217 | } | |
218 | goto bad; | |
219 | } | |
220 | val = parse_attr(word, wordlen); | |
221 | if (0 <= val) | |
222 | attr |= (1 << val); | |
223 | else | |
224 | goto bad; | |
225 | } | |
226 | ||
227 | if (attr || !color_empty(&fg) || !color_empty(&bg)) { | |
228 | int sep = 0; | |
229 | int i; | |
230 | ||
231 | *dst++ = '\033'; | |
232 | *dst++ = '['; | |
233 | ||
234 | for (i = 0; attr; i++) { | |
235 | unsigned bit = (1 << i); | |
236 | if (!(attr & bit)) | |
237 | continue; | |
238 | attr &= ~bit; | |
239 | if (sep++) | |
240 | *dst++ = ';'; | |
241 | dst += sprintf(dst, "%d", i); | |
242 | } | |
243 | if (!color_empty(&fg)) { | |
244 | if (sep++) | |
245 | *dst++ = ';'; | |
246 | /* foreground colors are all in the 3x range */ | |
247 | dst = color_output(dst, &fg, '3'); | |
248 | } | |
249 | if (!color_empty(&bg)) { | |
250 | if (sep++) | |
251 | *dst++ = ';'; | |
252 | /* background colors are all in the 4x range */ | |
253 | dst = color_output(dst, &bg, '4'); | |
254 | } | |
255 | *dst++ = 'm'; | |
256 | } | |
257 | *dst = 0; | |
258 | return 0; | |
259 | bad: | |
260 | return error(_("invalid color value: %.*s"), value_len, value); | |
261 | } | |
262 | ||
263 | int git_config_colorbool(const char *var, const char *value) | |
264 | { | |
265 | if (value) { | |
266 | if (!strcasecmp(value, "never")) | |
267 | return 0; | |
268 | if (!strcasecmp(value, "always")) | |
269 | return 1; | |
270 | if (!strcasecmp(value, "auto")) | |
271 | return GIT_COLOR_AUTO; | |
272 | } | |
273 | ||
274 | if (!var) | |
275 | return -1; | |
276 | ||
277 | /* Missing or explicit false to turn off colorization */ | |
278 | if (!git_config_bool(var, value)) | |
279 | return 0; | |
280 | ||
281 | /* any normal truth value defaults to 'auto' */ | |
282 | return GIT_COLOR_AUTO; | |
283 | } | |
284 | ||
285 | static int check_auto_color(void) | |
286 | { | |
287 | if (color_stdout_is_tty < 0) | |
288 | color_stdout_is_tty = isatty(1); | |
289 | if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) { | |
290 | char *term = getenv("TERM"); | |
291 | if (term && strcmp(term, "dumb")) | |
292 | return 1; | |
293 | } | |
294 | return 0; | |
295 | } | |
296 | ||
297 | int want_color(int var) | |
298 | { | |
299 | static int want_auto = -1; | |
300 | ||
301 | if (var < 0) | |
302 | var = git_use_color_default; | |
303 | ||
304 | if (var == GIT_COLOR_AUTO) { | |
305 | if (want_auto < 0) | |
306 | want_auto = check_auto_color(); | |
307 | return want_auto; | |
308 | } | |
309 | return var; | |
310 | } | |
311 | ||
312 | int git_color_config(const char *var, const char *value, void *cb) | |
313 | { | |
314 | if (!strcmp(var, "color.ui")) { | |
315 | git_use_color_default = git_config_colorbool(var, value); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | int git_color_default_config(const char *var, const char *value, void *cb) | |
323 | { | |
324 | if (git_color_config(var, value, cb) < 0) | |
325 | return -1; | |
326 | ||
327 | return git_default_config(var, value, cb); | |
328 | } | |
329 | ||
330 | void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb) | |
331 | { | |
332 | if (*color) | |
333 | fprintf(fp, "%s", color); | |
334 | fprintf(fp, "%s", sb->buf); | |
335 | if (*color) | |
336 | fprintf(fp, "%s", GIT_COLOR_RESET); | |
337 | } | |
338 | ||
339 | static int color_vfprintf(FILE *fp, const char *color, const char *fmt, | |
340 | va_list args, const char *trail) | |
341 | { | |
342 | int r = 0; | |
343 | ||
344 | if (*color) | |
345 | r += fprintf(fp, "%s", color); | |
346 | r += vfprintf(fp, fmt, args); | |
347 | if (*color) | |
348 | r += fprintf(fp, "%s", GIT_COLOR_RESET); | |
349 | if (trail) | |
350 | r += fprintf(fp, "%s", trail); | |
351 | return r; | |
352 | } | |
353 | ||
354 | ||
355 | ||
356 | int color_fprintf(FILE *fp, const char *color, const char *fmt, ...) | |
357 | { | |
358 | va_list args; | |
359 | int r; | |
360 | va_start(args, fmt); | |
361 | r = color_vfprintf(fp, color, fmt, args, NULL); | |
362 | va_end(args); | |
363 | return r; | |
364 | } | |
365 | ||
366 | int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...) | |
367 | { | |
368 | va_list args; | |
369 | int r; | |
370 | va_start(args, fmt); | |
371 | r = color_vfprintf(fp, color, fmt, args, "\n"); | |
372 | va_end(args); | |
373 | return r; | |
374 | } | |
375 | ||
376 | int color_is_nil(const char *c) | |
377 | { | |
378 | return !strcmp(c, "NIL"); | |
379 | } |