1 /* $OpenBSD: style.c,v 1.20 2019/05/12 18:16:33 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * Copyright (c) 2014 Tiago Cunha <tcunha@users.sourceforge.net> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 22 #include <ctype.h> 23 #include <stdlib.h> 24 #include <string.h> 25 26 #include "tmux.h" 27 28 /* Mask for bits not included in style. */ 29 #define STYLE_ATTR_MASK (~GRID_ATTR_CHARSET) 30 31 /* Default style. */ 32 static struct style style_default = { 33 { 0, 0, 8, 8, { { ' ' }, 0, 1, 1 } }, 34 35 STYLE_ALIGN_DEFAULT, 36 STYLE_LIST_OFF, 37 38 STYLE_RANGE_NONE, 0 39 }; 40 41 /* 42 * Parse an embedded style of the form "fg=colour,bg=colour,bright,...". 43 * Note that this adds onto the given style, so it must have been initialized 44 * alredy. 45 */ 46 int 47 style_parse(struct style *sy, const struct grid_cell *base, const char *in) 48 { 49 struct style saved; 50 const char delimiters[] = " ,", *cp; 51 char tmp[256], *found; 52 int value; 53 size_t end; 54 55 if (*in == '\0') 56 return (0); 57 style_copy(&saved, sy); 58 59 do { 60 while (*in != '\0' && strchr(delimiters, *in) != NULL) 61 in++; 62 if (*in == '\0') 63 break; 64 65 end = strcspn(in, delimiters); 66 if (end > (sizeof tmp) - 1) 67 goto error; 68 memcpy(tmp, in, end); 69 tmp[end] = '\0'; 70 71 if (strcasecmp(tmp, "default") == 0) { 72 sy->gc.fg = base->fg; 73 sy->gc.bg = base->bg; 74 sy->gc.attr = base->attr; 75 sy->gc.flags = base->flags; 76 } else if (strcasecmp(tmp, "nolist") == 0) 77 sy->list = STYLE_LIST_OFF; 78 else if (strncasecmp(tmp, "list=", 5) == 0) { 79 if (strcasecmp(tmp + 5, "on") == 0) 80 sy->list = STYLE_LIST_ON; 81 else if (strcasecmp(tmp + 5, "focus") == 0) 82 sy->list = STYLE_LIST_FOCUS; 83 else if (strcasecmp(tmp + 5, "left-marker") == 0) 84 sy->list = STYLE_LIST_LEFT_MARKER; 85 else if (strcasecmp(tmp + 5, "right-marker") == 0) 86 sy->list = STYLE_LIST_RIGHT_MARKER; 87 else 88 goto error; 89 } else if (strcasecmp(tmp, "norange") == 0) { 90 sy->range_type = style_default.range_type; 91 sy->range_argument = style_default.range_type; 92 } else if (end > 6 && strncasecmp(tmp, "range=", 6) == 0) { 93 found = strchr(tmp + 6, '|'); 94 if (found != NULL) { 95 *found++ = '\0'; 96 if (*found == '\0') 97 goto error; 98 for (cp = found; *cp != '\0'; cp++) { 99 if (!isdigit((u_char)*cp)) 100 goto error; 101 } 102 } 103 if (strcasecmp(tmp + 6, "left") == 0) { 104 if (found != NULL) 105 goto error; 106 sy->range_type = STYLE_RANGE_LEFT; 107 sy->range_argument = 0; 108 } else if (strcasecmp(tmp + 6, "right") == 0) { 109 if (found != NULL) 110 goto error; 111 sy->range_type = STYLE_RANGE_RIGHT; 112 sy->range_argument = 0; 113 } else if (strcasecmp(tmp + 6, "window") == 0) { 114 if (found == NULL) 115 goto error; 116 sy->range_type = STYLE_RANGE_WINDOW; 117 sy->range_argument = atoi(found); 118 } 119 } else if (strcasecmp(tmp, "noalign") == 0) 120 sy->align = style_default.align; 121 else if (end > 6 && strncasecmp(tmp, "align=", 6) == 0) { 122 if (strcasecmp(tmp + 6, "left") == 0) 123 sy->align = STYLE_ALIGN_LEFT; 124 else if (strcasecmp(tmp + 6, "centre") == 0) 125 sy->align = STYLE_ALIGN_CENTRE; 126 else if (strcasecmp(tmp + 6, "right") == 0) 127 sy->align = STYLE_ALIGN_RIGHT; 128 else 129 goto error; 130 } else if (end > 3 && strncasecmp(tmp + 1, "g=", 2) == 0) { 131 if ((value = colour_fromstring(tmp + 3)) == -1) 132 goto error; 133 if (*in == 'f' || *in == 'F') { 134 if (value != 8) 135 sy->gc.fg = value; 136 else 137 sy->gc.fg = base->fg; 138 } else if (*in == 'b' || *in == 'B') { 139 if (value != 8) 140 sy->gc.bg = value; 141 else 142 sy->gc.bg = base->bg; 143 } else 144 goto error; 145 } else if (strcasecmp(tmp, "none") == 0) 146 sy->gc.attr = 0; 147 else if (end > 2 && strncasecmp(tmp, "no", 2) == 0) { 148 if ((value = attributes_fromstring(tmp + 2)) == -1) 149 goto error; 150 sy->gc.attr &= ~value; 151 } else { 152 if ((value = attributes_fromstring(tmp)) == -1) 153 goto error; 154 sy->gc.attr |= value; 155 } 156 157 in += end + strspn(in + end, delimiters); 158 } while (*in != '\0'); 159 160 return (0); 161 162 error: 163 style_copy(sy, &saved); 164 return (-1); 165 } 166 167 /* Convert style to a string. */ 168 const char * 169 style_tostring(struct style *sy) 170 { 171 struct grid_cell *gc = &sy->gc; 172 int off = 0; 173 const char *comma = "", *tmp = ""; 174 static char s[256]; 175 char b[16]; 176 177 *s = '\0'; 178 179 if (sy->list != STYLE_LIST_OFF) { 180 if (sy->list == STYLE_LIST_ON) 181 tmp = "on"; 182 else if (sy->list == STYLE_LIST_FOCUS) 183 tmp = "focus"; 184 else if (sy->list == STYLE_LIST_LEFT_MARKER) 185 tmp = "left-marker"; 186 else if (sy->list == STYLE_LIST_RIGHT_MARKER) 187 tmp = "right-marker"; 188 off += xsnprintf(s + off, sizeof s - off, "%slist=%s", comma, 189 tmp); 190 comma = ","; 191 } 192 if (sy->range_type != STYLE_RANGE_NONE) { 193 if (sy->range_type == STYLE_RANGE_LEFT) 194 tmp = "left"; 195 else if (sy->range_type == STYLE_RANGE_RIGHT) 196 tmp = "right"; 197 else if (sy->range_type == STYLE_RANGE_WINDOW) { 198 snprintf(b, sizeof b, "window|%u", sy->range_argument); 199 tmp = b; 200 } 201 off += xsnprintf(s + off, sizeof s - off, "%srange=%s", comma, 202 tmp); 203 comma = ","; 204 } 205 if (sy->align != STYLE_ALIGN_DEFAULT) { 206 if (sy->align == STYLE_ALIGN_LEFT) 207 tmp = "left"; 208 else if (sy->align == STYLE_ALIGN_CENTRE) 209 tmp = "centre"; 210 else if (sy->align == STYLE_ALIGN_RIGHT) 211 tmp = "right"; 212 off += xsnprintf(s + off, sizeof s - off, "%salign=%s", comma, 213 tmp); 214 comma = ","; 215 } 216 if (gc->fg != 8) { 217 off += xsnprintf(s + off, sizeof s - off, "%sfg=%s", comma, 218 colour_tostring(gc->fg)); 219 comma = ","; 220 } 221 if (gc->bg != 8) { 222 off += xsnprintf(s + off, sizeof s - off, "%sbg=%s", comma, 223 colour_tostring(gc->bg)); 224 comma = ","; 225 } 226 if (gc->attr != 0 && gc->attr != GRID_ATTR_CHARSET) { 227 xsnprintf(s + off, sizeof s - off, "%s%s", comma, 228 attributes_tostring(gc->attr)); 229 comma = ","; 230 } 231 232 if (*s == '\0') 233 return ("default"); 234 return (s); 235 } 236 237 /* Apply a style. */ 238 void 239 style_apply(struct grid_cell *gc, struct options *oo, const char *name) 240 { 241 struct style *sy; 242 243 memcpy(gc, &grid_default_cell, sizeof *gc); 244 sy = options_get_style(oo, name); 245 gc->fg = sy->gc.fg; 246 gc->bg = sy->gc.bg; 247 gc->attr |= sy->gc.attr; 248 } 249 250 /* Apply a style, updating if default. */ 251 void 252 style_apply_update(struct grid_cell *gc, struct options *oo, const char *name) 253 { 254 struct style *sy; 255 256 sy = options_get_style(oo, name); 257 if (sy->gc.fg != 8) 258 gc->fg = sy->gc.fg; 259 if (sy->gc.bg != 8) 260 gc->bg = sy->gc.bg; 261 if (sy->gc.attr != 0) 262 gc->attr |= sy->gc.attr; 263 } 264 265 /* Initialize style from cell. */ 266 void 267 style_set(struct style *sy, const struct grid_cell *gc) 268 { 269 memcpy(sy, &style_default, sizeof *sy); 270 memcpy(&sy->gc, gc, sizeof sy->gc); 271 } 272 273 /* Copy style. */ 274 void 275 style_copy(struct style *dst, struct style *src) 276 { 277 memcpy(dst, src, sizeof *dst); 278 } 279 280 /* Check if two styles are (visibly) the same. */ 281 int 282 style_equal(struct style *sy1, struct style *sy2) 283 { 284 struct grid_cell *gc1 = &sy1->gc; 285 struct grid_cell *gc2 = &sy2->gc; 286 287 if (gc1->fg != gc2->fg) 288 return (0); 289 if (gc1->bg != gc2->bg) 290 return (0); 291 if ((gc1->attr & STYLE_ATTR_MASK) != (gc2->attr & STYLE_ATTR_MASK)) 292 return (0); 293 if (sy1->align != sy2->align) 294 return (0); 295 return (1); 296 } 297 298 /* Is this style default? */ 299 int 300 style_is_default(struct style *sy) 301 { 302 return (style_equal(sy, &style_default)); 303 } 304