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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "color.h" | |
4 | ||
5 | static int git_use_color_default = GIT_COLOR_AUTO; | |
6 | int color_stdout_is_tty = -1; | |
7 | ||
8 | /* | |
9 | * The list of available column colors. | |
10 | */ | |
11 | const char *column_colors_ansi[] = { | |
12 | GIT_COLOR_RED, | |
13 | GIT_COLOR_GREEN, | |
14 | GIT_COLOR_YELLOW, | |
15 | GIT_COLOR_BLUE, | |
16 | GIT_COLOR_MAGENTA, | |
17 | GIT_COLOR_CYAN, | |
18 | GIT_COLOR_BOLD_RED, | |
19 | GIT_COLOR_BOLD_GREEN, | |
20 | GIT_COLOR_BOLD_YELLOW, | |
21 | GIT_COLOR_BOLD_BLUE, | |
22 | GIT_COLOR_BOLD_MAGENTA, | |
23 | GIT_COLOR_BOLD_CYAN, | |
24 | GIT_COLOR_RESET, | |
25 | }; | |
26 | ||
27 | /* Ignore the RESET at the end when giving the size */ | |
28 | const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1; | |
29 | ||
30 | /* An individual foreground or background color. */ | |
31 | struct color { | |
32 | enum { | |
33 | COLOR_UNSPECIFIED = 0, | |
34 | COLOR_NORMAL, | |
35 | COLOR_ANSI, /* basic 0-7 ANSI colors */ | |
36 | COLOR_256, | |
37 | COLOR_RGB | |
38 | } type; | |
39 | /* The numeric value for ANSI and 256-color modes */ | |
40 | unsigned char value; | |
41 | /* 24-bit RGB color values */ | |
42 | unsigned char red, green, blue; | |
43 | }; | |
44 | ||
45 | /* | |
46 | * "word" is a buffer of length "len"; does it match the NUL-terminated | |
47 | * "match" exactly? | |
48 | */ | |
49 | static int match_word(const char *word, int len, const char *match) | |
50 | { | |
51 | return !strncasecmp(word, match, len) && !match[len]; | |
52 | } | |
53 | ||
54 | static int get_hex_color(const char *in, unsigned char *out) | |
55 | { | |
56 | unsigned int val; | |
57 | val = (hexval(in[0]) << 4) | hexval(in[1]); | |
58 | if (val & ~0xff) | |
59 | return -1; | |
60 | *out = val; | |
61 | return 0; | |
62 | } | |
63 | ||
64 | static int parse_color(struct color *out, const char *name, int len) | |
65 | { | |
66 | /* Positions in array must match ANSI color codes */ | |
67 | static const char * const color_names[] = { | |
68 | "black", "red", "green", "yellow", | |
69 | "blue", "magenta", "cyan", "white" | |
70 | }; | |
71 | char *end; | |
72 | int i; | |
73 | long val; | |
74 | ||
75 | /* First try the special word "normal"... */ | |
76 | if (match_word(name, len, "normal")) { | |
77 | out->type = COLOR_NORMAL; | |
78 | return 0; | |
79 | } | |
80 | ||
81 | /* Try a 24-bit RGB value */ | |
82 | if (len == 7 && name[0] == '#') { | |
83 | if (!get_hex_color(name + 1, &out->red) && | |
84 | !get_hex_color(name + 3, &out->green) && | |
85 | !get_hex_color(name + 5, &out->blue)) { | |
86 | out->type = COLOR_RGB; | |
87 | return 0; | |
88 | } | |
89 | } | |
90 | ||
91 | /* Then pick from our human-readable color names... */ | |
92 | for (i = 0; i < ARRAY_SIZE(color_names); i++) { | |
93 | if (match_word(name, len, color_names[i])) { | |
94 | out->type = COLOR_ANSI; | |
95 | out->value = i; | |
96 | return 0; | |
97 | } | |
98 | } | |
99 | ||
100 | /* And finally try a literal 256-color-mode number */ | |
101 | val = strtol(name, &end, 10); | |
102 | if (end - name == len) { | |
103 | /* | |
104 | * Allow "-1" as an alias for "normal", but other negative | |
105 | * numbers are bogus. | |
106 | */ | |
107 | if (val < -1) | |
108 | ; /* fall through to error */ | |
109 | else if (val < 0) { | |
110 | out->type = COLOR_NORMAL; | |
111 | return 0; | |
112 | /* Rewrite low numbers as more-portable standard colors. */ | |
113 | } else if (val < 8) { | |
114 | out->type = COLOR_ANSI; | |
115 | out->value = val; | |
116 | return 0; | |
117 | } else if (val < 256) { | |
118 | out->type = COLOR_256; | |
119 | out->value = val; | |
120 | return 0; | |
121 | } | |
122 | } | |
123 | ||
124 | return -1; | |
125 | } | |
126 | ||
127 | static int parse_attr(const char *name, size_t len) | |
128 | { | |
129 | static const struct { | |
130 | const char *name; | |
131 | size_t len; | |
132 | int val, neg; | |
133 | } attrs[] = { | |
134 | #define ATTR(x, val, neg) { (x), sizeof(x)-1, (val), (neg) } | |
135 | ATTR("bold", 1, 22), | |
136 | ATTR("dim", 2, 22), | |
137 | ATTR("italic", 3, 23), | |
138 | ATTR("ul", 4, 24), | |
139 | ATTR("blink", 5, 25), | |
140 | ATTR("reverse", 7, 27), | |
141 | ATTR("strike", 9, 29) | |
142 | #undef ATTR | |
143 | }; | |
144 | int negate = 0; | |
145 | int i; | |
146 | ||
147 | if (skip_prefix_mem(name, len, "no", &name, &len)) { | |
148 | skip_prefix_mem(name, len, "-", &name, &len); | |
149 | negate = 1; | |
150 | } | |
151 | ||
152 | for (i = 0; i < ARRAY_SIZE(attrs); i++) { | |
153 | if (attrs[i].len == len && !memcmp(attrs[i].name, name, len)) | |
154 | return negate ? attrs[i].neg : attrs[i].val; | |
155 | } | |
156 | return -1; | |
157 | } | |
158 | ||
159 | int color_parse(const char *value, char *dst) | |
160 | { | |
161 | return color_parse_mem(value, strlen(value), dst); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Write the ANSI color codes for "c" to "out"; the string should | |
166 | * already have the ANSI escape code in it. "out" should have enough | |
167 | * space in it to fit any color. | |
168 | */ | |
169 | static char *color_output(char *out, int len, const struct color *c, char type) | |
170 | { | |
171 | switch (c->type) { | |
172 | case COLOR_UNSPECIFIED: | |
173 | case COLOR_NORMAL: | |
174 | break; | |
175 | case COLOR_ANSI: | |
176 | if (len < 2) | |
177 | BUG("color parsing ran out of space"); | |
178 | *out++ = type; | |
179 | *out++ = '0' + c->value; | |
180 | break; | |
181 | case COLOR_256: | |
182 | out += xsnprintf(out, len, "%c8;5;%d", type, c->value); | |
183 | break; | |
184 | case COLOR_RGB: | |
185 | out += xsnprintf(out, len, "%c8;2;%d;%d;%d", type, | |
186 | c->red, c->green, c->blue); | |
187 | break; | |
188 | } | |
189 | return out; | |
190 | } | |
191 | ||
192 | static int color_empty(const struct color *c) | |
193 | { | |
194 | return c->type <= COLOR_NORMAL; | |
195 | } | |
196 | ||
197 | int color_parse_mem(const char *value, int value_len, char *dst) | |
198 | { | |
199 | const char *ptr = value; | |
200 | int len = value_len; | |
201 | char *end = dst + COLOR_MAXLEN; | |
202 | unsigned int attr = 0; | |
203 | struct color fg = { COLOR_UNSPECIFIED }; | |
204 | struct color bg = { COLOR_UNSPECIFIED }; | |
205 | ||
206 | while (len > 0 && isspace(*ptr)) { | |
207 | ptr++; | |
208 | len--; | |
209 | } | |
210 | ||
211 | if (!len) { | |
212 | dst[0] = '\0'; | |
213 | return 0; | |
214 | } | |
215 | ||
216 | if (!strncasecmp(ptr, "reset", len)) { | |
217 | xsnprintf(dst, end - dst, GIT_COLOR_RESET); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | /* [fg [bg]] [attr]... */ | |
222 | while (len > 0) { | |
223 | const char *word = ptr; | |
224 | struct color c = { COLOR_UNSPECIFIED }; | |
225 | int val, wordlen = 0; | |
226 | ||
227 | while (len > 0 && !isspace(word[wordlen])) { | |
228 | wordlen++; | |
229 | len--; | |
230 | } | |
231 | ||
232 | ptr = word + wordlen; | |
233 | while (len > 0 && isspace(*ptr)) { | |
234 | ptr++; | |
235 | len--; | |
236 | } | |
237 | ||
238 | if (!parse_color(&c, word, wordlen)) { | |
239 | if (fg.type == COLOR_UNSPECIFIED) { | |
240 | fg = c; | |
241 | continue; | |
242 | } | |
243 | if (bg.type == COLOR_UNSPECIFIED) { | |
244 | bg = c; | |
245 | continue; | |
246 | } | |
247 | goto bad; | |
248 | } | |
249 | val = parse_attr(word, wordlen); | |
250 | if (0 <= val) | |
251 | attr |= (1 << val); | |
252 | else | |
253 | goto bad; | |
254 | } | |
255 | ||
256 | #undef OUT | |
257 | #define OUT(x) do { \ | |
258 | if (dst == end) \ | |
259 | BUG("color parsing ran out of space"); \ | |
260 | *dst++ = (x); \ | |
261 | } while(0) | |
262 | ||
263 | if (attr || !color_empty(&fg) || !color_empty(&bg)) { | |
264 | int sep = 0; | |
265 | int i; | |
266 | ||
267 | OUT('\033'); | |
268 | OUT('['); | |
269 | ||
270 | for (i = 0; attr; i++) { | |
271 | unsigned bit = (1 << i); | |
272 | if (!(attr & bit)) | |
273 | continue; | |
274 | attr &= ~bit; | |
275 | if (sep++) | |
276 | OUT(';'); | |
277 | dst += xsnprintf(dst, end - dst, "%d", i); | |
278 | } | |
279 | if (!color_empty(&fg)) { | |
280 | if (sep++) | |
281 | OUT(';'); | |
282 | /* foreground colors are all in the 3x range */ | |
283 | dst = color_output(dst, end - dst, &fg, '3'); | |
284 | } | |
285 | if (!color_empty(&bg)) { | |
286 | if (sep++) | |
287 | OUT(';'); | |
288 | /* background colors are all in the 4x range */ | |
289 | dst = color_output(dst, end - dst, &bg, '4'); | |
290 | } | |
291 | OUT('m'); | |
292 | } | |
293 | OUT(0); | |
294 | return 0; | |
295 | bad: | |
296 | return error(_("invalid color value: %.*s"), value_len, value); | |
297 | #undef OUT | |
298 | } | |
299 | ||
300 | int git_config_colorbool(const char *var, const char *value) | |
301 | { | |
302 | if (value) { | |
303 | if (!strcasecmp(value, "never")) | |
304 | return 0; | |
305 | if (!strcasecmp(value, "always")) | |
306 | return 1; | |
307 | if (!strcasecmp(value, "auto")) | |
308 | return GIT_COLOR_AUTO; | |
309 | } | |
310 | ||
311 | if (!var) | |
312 | return -1; | |
313 | ||
314 | /* Missing or explicit false to turn off colorization */ | |
315 | if (!git_config_bool(var, value)) | |
316 | return 0; | |
317 | ||
318 | /* any normal truth value defaults to 'auto' */ | |
319 | return GIT_COLOR_AUTO; | |
320 | } | |
321 | ||
322 | static int check_auto_color(int fd) | |
323 | { | |
324 | static int color_stderr_is_tty = -1; | |
325 | int *is_tty_p = fd == 1 ? &color_stdout_is_tty : &color_stderr_is_tty; | |
326 | if (*is_tty_p < 0) | |
327 | *is_tty_p = isatty(fd); | |
328 | if (*is_tty_p || (fd == 1 && pager_in_use() && pager_use_color)) { | |
329 | if (!is_terminal_dumb()) | |
330 | return 1; | |
331 | } | |
332 | return 0; | |
333 | } | |
334 | ||
335 | int want_color_fd(int fd, int var) | |
336 | { | |
337 | /* | |
338 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
339 | * we end up using want_auto racily. That "should not matter" since | |
340 | * we always write the same value, but it's still wrong. This function | |
341 | * is listed in .tsan-suppressions for the time being. | |
342 | */ | |
343 | ||
344 | static int want_auto[3] = { -1, -1, -1 }; | |
345 | ||
346 | if (fd < 1 || fd >= ARRAY_SIZE(want_auto)) | |
347 | BUG("file descriptor out of range: %d", fd); | |
348 | ||
349 | if (var < 0) | |
350 | var = git_use_color_default; | |
351 | ||
352 | if (var == GIT_COLOR_AUTO) { | |
353 | if (want_auto[fd] < 0) | |
354 | want_auto[fd] = check_auto_color(fd); | |
355 | return want_auto[fd]; | |
356 | } | |
357 | return var; | |
358 | } | |
359 | ||
360 | int git_color_config(const char *var, const char *value, void *cb) | |
361 | { | |
362 | if (!strcmp(var, "color.ui")) { | |
363 | git_use_color_default = git_config_colorbool(var, value); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | int git_color_default_config(const char *var, const char *value, void *cb) | |
371 | { | |
372 | if (git_color_config(var, value, cb) < 0) | |
373 | return -1; | |
374 | ||
375 | return git_default_config(var, value, cb); | |
376 | } | |
377 | ||
378 | void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb) | |
379 | { | |
380 | if (*color) | |
381 | fprintf(fp, "%s", color); | |
382 | fprintf(fp, "%s", sb->buf); | |
383 | if (*color) | |
384 | fprintf(fp, "%s", GIT_COLOR_RESET); | |
385 | } | |
386 | ||
387 | static int color_vfprintf(FILE *fp, const char *color, const char *fmt, | |
388 | va_list args, const char *trail) | |
389 | { | |
390 | int r = 0; | |
391 | ||
392 | if (*color) | |
393 | r += fprintf(fp, "%s", color); | |
394 | r += vfprintf(fp, fmt, args); | |
395 | if (*color) | |
396 | r += fprintf(fp, "%s", GIT_COLOR_RESET); | |
397 | if (trail) | |
398 | r += fprintf(fp, "%s", trail); | |
399 | return r; | |
400 | } | |
401 | ||
402 | int color_fprintf(FILE *fp, const char *color, const char *fmt, ...) | |
403 | { | |
404 | va_list args; | |
405 | int r; | |
406 | va_start(args, fmt); | |
407 | r = color_vfprintf(fp, color, fmt, args, NULL); | |
408 | va_end(args); | |
409 | return r; | |
410 | } | |
411 | ||
412 | int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...) | |
413 | { | |
414 | va_list args; | |
415 | int r; | |
416 | va_start(args, fmt); | |
417 | r = color_vfprintf(fp, color, fmt, args, "\n"); | |
418 | va_end(args); | |
419 | return r; | |
420 | } | |
421 | ||
422 | int color_is_nil(const char *c) | |
423 | { | |
424 | return !strcmp(c, "NIL"); | |
425 | } |