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1 | #include "cache.h" | |
2 | #include "color.h" | |
3 | ||
4 | static int git_use_color_default = 0; | |
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 | static 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 | ||
48 | static 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 | ||
63 | void color_parse(const char *value, const char *var, char *dst) | |
64 | { | |
65 | color_parse_mem(value, strlen(value), var, dst); | |
66 | } | |
67 | ||
68 | void 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; | |
157 | bad: | |
158 | die("bad color value '%.*s' for variable '%s'", value_len, value, var); | |
159 | } | |
160 | ||
161 | int 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 | ||
183 | static 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 | ||
195 | int 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 | ||
210 | int 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 | ||
220 | int 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 | ||
228 | void 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 | ||
237 | static 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 | ||
254 | int 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 | ||
264 | int 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 | ||
274 | int color_is_nil(const char *c) | |
275 | { | |
276 | return !strcmp(c, "NIL"); | |
277 | } |