diff: refactor COLOR_DIFF from a flag into an int
[git/git.git] / color.c
CommitLineData
7c92fe0e 1#include "cache.h"
85023577 2#include "color.h"
7c92fe0e 3
6b2f2d98
MK
4int git_use_color_default = 0;
5
7cd52b5b
DM
6/*
7 * The list of available column colors.
8 */
9const char *column_colors_ansi[] = {
10 GIT_COLOR_RED,
11 GIT_COLOR_GREEN,
12 GIT_COLOR_YELLOW,
13 GIT_COLOR_BLUE,
14 GIT_COLOR_MAGENTA,
15 GIT_COLOR_CYAN,
16 GIT_COLOR_BOLD_RED,
17 GIT_COLOR_BOLD_GREEN,
18 GIT_COLOR_BOLD_YELLOW,
19 GIT_COLOR_BOLD_BLUE,
20 GIT_COLOR_BOLD_MAGENTA,
21 GIT_COLOR_BOLD_CYAN,
22 GIT_COLOR_RESET,
23};
24
25/* Ignore the RESET at the end when giving the size */
26const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
27
7c92fe0e
JK
28static int parse_color(const char *name, int len)
29{
30 static const char * const color_names[] = {
31 "normal", "black", "red", "green", "yellow",
32 "blue", "magenta", "cyan", "white"
33 };
34 char *end;
35 int i;
36 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
37 const char *str = color_names[i];
38 if (!strncasecmp(name, str, len) && !str[len])
39 return i - 1;
40 }
41 i = strtol(name, &end, 10);
a0cf49c1 42 if (end - name == len && i >= -1 && i <= 255)
7c92fe0e
JK
43 return i;
44 return -2;
45}
46
47static int parse_attr(const char *name, int len)
48{
49 static const int attr_values[] = { 1, 2, 4, 5, 7 };
50 static const char * const attr_names[] = {
51 "bold", "dim", "ul", "blink", "reverse"
52 };
53 int i;
54 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
55 const char *str = attr_names[i];
56 if (!strncasecmp(name, str, len) && !str[len])
57 return attr_values[i];
58 }
59 return -1;
60}
61
62void color_parse(const char *value, const char *var, char *dst)
2c2dc7c8
RS
63{
64 color_parse_mem(value, strlen(value), var, dst);
65}
66
67void color_parse_mem(const char *value, int value_len, const char *var,
68 char *dst)
7c92fe0e
JK
69{
70 const char *ptr = value;
2c2dc7c8 71 int len = value_len;
8b124135 72 unsigned int attr = 0;
7c92fe0e
JK
73 int fg = -2;
74 int bg = -2;
75
2c2dc7c8 76 if (!strncasecmp(value, "reset", len)) {
dc6ebd4c 77 strcpy(dst, GIT_COLOR_RESET);
7c92fe0e
JK
78 return;
79 }
80
8b124135 81 /* [fg [bg]] [attr]... */
2c2dc7c8 82 while (len > 0) {
7c92fe0e 83 const char *word = ptr;
2c2dc7c8 84 int val, wordlen = 0;
7c92fe0e 85
2c2dc7c8
RS
86 while (len > 0 && !isspace(word[wordlen])) {
87 wordlen++;
88 len--;
89 }
7c92fe0e 90
2c2dc7c8
RS
91 ptr = word + wordlen;
92 while (len > 0 && isspace(*ptr)) {
7c92fe0e 93 ptr++;
2c2dc7c8
RS
94 len--;
95 }
7c92fe0e 96
2c2dc7c8 97 val = parse_color(word, wordlen);
7c92fe0e
JK
98 if (val >= -1) {
99 if (fg == -2) {
100 fg = val;
101 continue;
102 }
103 if (bg == -2) {
104 bg = val;
105 continue;
106 }
107 goto bad;
108 }
2c2dc7c8 109 val = parse_attr(word, wordlen);
8b124135
JH
110 if (0 <= val)
111 attr |= (1 << val);
112 else
7c92fe0e 113 goto bad;
7c92fe0e
JK
114 }
115
8b124135 116 if (attr || fg >= 0 || bg >= 0) {
7c92fe0e 117 int sep = 0;
8b124135 118 int i;
7c92fe0e
JK
119
120 *dst++ = '\033';
121 *dst++ = '[';
8b124135
JH
122
123 for (i = 0; attr; i++) {
124 unsigned bit = (1 << i);
125 if (!(attr & bit))
126 continue;
127 attr &= ~bit;
128 if (sep++)
129 *dst++ = ';';
130 *dst++ = '0' + i;
7c92fe0e
JK
131 }
132 if (fg >= 0) {
133 if (sep++)
134 *dst++ = ';';
135 if (fg < 8) {
136 *dst++ = '3';
137 *dst++ = '0' + fg;
138 } else {
139 dst += sprintf(dst, "38;5;%d", fg);
140 }
141 }
142 if (bg >= 0) {
143 if (sep++)
144 *dst++ = ';';
145 if (bg < 8) {
146 *dst++ = '4';
147 *dst++ = '0' + bg;
148 } else {
149 dst += sprintf(dst, "48;5;%d", bg);
150 }
151 }
152 *dst++ = 'm';
153 }
154 *dst = 0;
155 return;
156bad:
2c2dc7c8 157 die("bad color value '%.*s' for variable '%s'", value_len, value, var);
7c92fe0e
JK
158}
159
0f6f5a40 160int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
7c92fe0e 161{
57f2b842
JH
162 if (value) {
163 if (!strcasecmp(value, "never"))
164 return 0;
165 if (!strcasecmp(value, "always"))
166 return 1;
167 if (!strcasecmp(value, "auto"))
168 goto auto_color;
7c92fe0e 169 }
57f2b842 170
73e9da01
ML
171 if (!var)
172 return -1;
173
57f2b842
JH
174 /* Missing or explicit false to turn off colorization */
175 if (!git_config_bool(var, value))
7c92fe0e 176 return 0;
57f2b842
JH
177
178 /* any normal truth value defaults to 'auto' */
179 auto_color:
0f6f5a40
JH
180 if (stdout_is_tty < 0)
181 stdout_is_tty = isatty(1);
6e9af863 182 if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
57f2b842
JH
183 char *term = getenv("TERM");
184 if (term && strcmp(term, "dumb"))
185 return 1;
186 }
187 return 0;
7c92fe0e
JK
188}
189
ef90d6d4 190int git_color_default_config(const char *var, const char *value, void *cb)
6b2f2d98
MK
191{
192 if (!strcmp(var, "color.ui")) {
193 git_use_color_default = git_config_colorbool(var, value, -1);
194 return 0;
195 }
196
ef90d6d4 197 return git_default_config(var, value, cb);
6b2f2d98
MK
198}
199
becbdae8
JN
200void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
201{
202 if (*color)
203 fprintf(fp, "%s", color);
204 fprintf(fp, "%s", sb->buf);
205 if (*color)
206 fprintf(fp, "%s", GIT_COLOR_RESET);
207}
208
f26a0012 209static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
7c92fe0e
JK
210 va_list args, const char *trail)
211{
212 int r = 0;
213
214 if (*color)
f26a0012
KH
215 r += fprintf(fp, "%s", color);
216 r += vfprintf(fp, fmt, args);
7c92fe0e 217 if (*color)
dc6ebd4c 218 r += fprintf(fp, "%s", GIT_COLOR_RESET);
7c92fe0e 219 if (trail)
f26a0012 220 r += fprintf(fp, "%s", trail);
7c92fe0e
JK
221 return r;
222}
223
224
225
f26a0012 226int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
7c92fe0e
JK
227{
228 va_list args;
229 int r;
230 va_start(args, fmt);
f26a0012 231 r = color_vfprintf(fp, color, fmt, args, NULL);
7c92fe0e
JK
232 va_end(args);
233 return r;
234}
235
f26a0012 236int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
7c92fe0e
JK
237{
238 va_list args;
239 int r;
240 va_start(args, fmt);
f26a0012 241 r = color_vfprintf(fp, color, fmt, args, "\n");
7c92fe0e
JK
242 va_end(args);
243 return r;
244}
148135fc
JK
245
246int color_is_nil(const char *c)
247{
248 return !strcmp(c, "NIL");
249}