style.c

   1 /* $OpenBSD$ */
   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 (~0)
  30
  31 /* Default style. */
  32 static struct style style_default = {
  33         { { { ' ' }, 0, 1, 1 }, 0, 0, 8, 8, 0, 0 },
  34         0,
  35
  36         8,
  37         STYLE_ALIGN_DEFAULT,
  38         STYLE_LIST_OFF,
  39
  40         STYLE_RANGE_NONE, 0,
  41
  42         STYLE_DEFAULT_BASE
  43 };
  44
  45 /*
  46  * Parse an embedded style of the form "fg=colour,bg=colour,bright,...".  Note
  47  * that this adds onto the given style, so it must have been initialized
  48  * already.
  49  */
  50 int
  51 style_parse(struct style *sy, const struct grid_cell *base, const char *in)
  52 {
  53         struct style    saved;
  54         const char      delimiters[] = " ,\n", *cp;
  55         char            tmp[256], *found;
  56         int             value;
  57         size_t          end;
  58
  59         if (*in == '\0')
  60                 return (0);
  61         style_copy(&saved, sy);
  62
  63         log_debug("%s: %s", __func__, in);
  64         do {
  65                 while (*in != '\0' && strchr(delimiters, *in) != NULL)
  66                         in++;
  67                 if (*in == '\0')
  68                         break;
  69
  70                 end = strcspn(in, delimiters);
  71                 if (end > (sizeof tmp) - 1)
  72                         goto error;
  73                 memcpy(tmp, in, end);
  74                 tmp[end] = '\0';
  75
  76                 log_debug("%s: %s", __func__, tmp);
  77                 if (strcasecmp(tmp, "default") == 0) {
  78                         sy->gc.fg = base->fg;
  79                         sy->gc.bg = base->bg;
  80                         sy->gc.us = base->us;
  81                         sy->gc.attr = base->attr;
  82                         sy->gc.flags = base->flags;
  83                 } else if (strcasecmp(tmp, "ignore") == 0)
  84                         sy->ignore = 1;
  85                 else if (strcasecmp(tmp, "noignore") == 0)
  86                         sy->ignore = 0;
  87                 else if (strcasecmp(tmp, "push-default") == 0)
  88                         sy->default_type = STYLE_DEFAULT_PUSH;
  89                 else if (strcasecmp(tmp, "pop-default") == 0)
  90                         sy->default_type = STYLE_DEFAULT_POP;
  91                 else if (strcasecmp(tmp, "nolist") == 0)
  92                         sy->list = STYLE_LIST_OFF;
  93                 else if (strncasecmp(tmp, "list=", 5) == 0) {
  94                         if (strcasecmp(tmp + 5, "on") == 0)
  95                                 sy->list = STYLE_LIST_ON;
  96                         else if (strcasecmp(tmp + 5, "focus") == 0)
  97                                 sy->list = STYLE_LIST_FOCUS;
  98                         else if (strcasecmp(tmp + 5, "left-marker") == 0)
  99                                 sy->list = STYLE_LIST_LEFT_MARKER;
 100                         else if (strcasecmp(tmp + 5, "right-marker") == 0)
 101                                 sy->list = STYLE_LIST_RIGHT_MARKER;
 102                         else
 103                                 goto error;
 104                 } else if (strcasecmp(tmp, "norange") == 0) {
 105                         sy->range_type = style_default.range_type;
 106                         sy->range_argument = style_default.range_type;
 107                 } else if (end > 6 && strncasecmp(tmp, "range=", 6) == 0) {
 108                         found = strchr(tmp + 6, '|');
 109                         if (found != NULL) {
 110                                 *found++ = '\0';
 111                                 if (*found == '\0')
 112                                         goto error;
 113                                 for (cp = found; *cp != '\0'; cp++) {
 114                                         if (!isdigit((u_char)*cp))
 115                                                 goto error;
 116                                 }
 117                         }
 118                         if (strcasecmp(tmp + 6, "left") == 0) {
 119                                 if (found != NULL)
 120                                         goto error;
 121                                 sy->range_type = STYLE_RANGE_LEFT;
 122                                 sy->range_argument = 0;
 123                         } else if (strcasecmp(tmp + 6, "right") == 0) {
 124                                 if (found != NULL)
 125                                         goto error;
 126                                 sy->range_type = STYLE_RANGE_RIGHT;
 127                                 sy->range_argument = 0;
 128                         } else if (strcasecmp(tmp + 6, "window") == 0) {
 129                                 if (found == NULL)
 130                                         goto error;
 131                                 sy->range_type = STYLE_RANGE_WINDOW;
 132                                 sy->range_argument = atoi(found);
 133                         }
 134                 } else if (strcasecmp(tmp, "noalign") == 0)
 135                         sy->align = style_default.align;
 136                 else if (end > 6 && strncasecmp(tmp, "align=", 6) == 0) {
 137                         if (strcasecmp(tmp + 6, "left") == 0)
 138                                 sy->align = STYLE_ALIGN_LEFT;
 139                         else if (strcasecmp(tmp + 6, "centre") == 0)
 140                                 sy->align = STYLE_ALIGN_CENTRE;
 141                         else if (strcasecmp(tmp + 6, "right") == 0)
 142                                 sy->align = STYLE_ALIGN_RIGHT;
 143                         else if (strcasecmp(tmp + 6, "absolute-centre") == 0)
 144                                 sy->align = STYLE_ALIGN_ABSOLUTE_CENTRE;
 145                         else
 146                                 goto error;
 147                 } else if (end > 5 && strncasecmp(tmp, "fill=", 5) == 0) {
 148                         if ((value = colour_fromstring(tmp + 5)) == -1)
 149                                 goto error;
 150                         sy->fill = value;
 151                 } else if (end > 3 && strncasecmp(tmp + 1, "g=", 2) == 0) {
 152                         if ((value = colour_fromstring(tmp + 3)) == -1)
 153                                 goto error;
 154                         if (*in == 'f' || *in == 'F') {
 155                                 if (value != 8)
 156                                         sy->gc.fg = value;
 157                                 else
 158                                         sy->gc.fg = base->fg;
 159                         } else if (*in == 'b' || *in == 'B') {
 160                                 if (value != 8)
 161                                         sy->gc.bg = value;
 162                                 else
 163                                         sy->gc.bg = base->bg;
 164                         } else
 165                                 goto error;
 166                 } else if (end > 3 && strncasecmp(tmp, "us=", 3) == 0) {
 167                         if ((value = colour_fromstring(tmp + 3)) == -1)
 168                                 goto error;
 169                         if (value != 8)
 170                                 sy->gc.us = value;
 171                         else
 172                                 sy->gc.us = base->us;
 173                 } else if (strcasecmp(tmp, "none") == 0)
 174                         sy->gc.attr = 0;
 175                 else if (end > 2 && strncasecmp(tmp, "no", 2) == 0) {
 176                         if ((value = attributes_fromstring(tmp + 2)) == -1)
 177                                 goto error;
 178                         sy->gc.attr &= ~value;
 179                 } else {
 180                         if ((value = attributes_fromstring(tmp)) == -1)
 181                                 goto error;
 182                         sy->gc.attr |= value;
 183                 }
 184
 185                 in += end + strspn(in + end, delimiters);
 186         } while (*in != '\0');
 187
 188         return (0);
 189
 190 error:
 191         style_copy(sy, &saved);
 192         return (-1);
 193 }
 194
 195 /* Convert style to a string. */
 196 const char *
 197 style_tostring(struct style *sy)
 198 {
 199         struct grid_cell        *gc = &sy->gc;
 200         int                      off = 0;
 201         const char              *comma = "", *tmp = "";
 202         static char              s[256];
 203         char                     b[16];
 204
 205         *s = '\0';
 206
 207         if (sy->list != STYLE_LIST_OFF) {
 208                 if (sy->list == STYLE_LIST_ON)
 209                         tmp = "on";
 210                 else if (sy->list == STYLE_LIST_FOCUS)
 211                         tmp = "focus";
 212                 else if (sy->list == STYLE_LIST_LEFT_MARKER)
 213                         tmp = "left-marker";
 214                 else if (sy->list == STYLE_LIST_RIGHT_MARKER)
 215                         tmp = "right-marker";
 216                 off += xsnprintf(s + off, sizeof s - off, "%slist=%s", comma,
 217                     tmp);
 218                 comma = ",";
 219         }
 220         if (sy->range_type != STYLE_RANGE_NONE) {
 221                 if (sy->range_type == STYLE_RANGE_LEFT)
 222                         tmp = "left";
 223                 else if (sy->range_type == STYLE_RANGE_RIGHT)
 224                         tmp = "right";
 225                 else if (sy->range_type == STYLE_RANGE_WINDOW) {
 226                         snprintf(b, sizeof b, "window|%u", sy->range_argument);
 227                         tmp = b;
 228                 }
 229                 off += xsnprintf(s + off, sizeof s - off, "%srange=%s", comma,
 230                     tmp);
 231                 comma = ",";
 232         }
 233         if (sy->align != STYLE_ALIGN_DEFAULT) {
 234                 if (sy->align == STYLE_ALIGN_LEFT)
 235                         tmp = "left";
 236                 else if (sy->align == STYLE_ALIGN_CENTRE)
 237                         tmp = "centre";
 238                 else if (sy->align == STYLE_ALIGN_RIGHT)
 239                         tmp = "right";
 240                 else if (sy->align == STYLE_ALIGN_ABSOLUTE_CENTRE)
 241                         tmp = "absolute-centre";
 242                 off += xsnprintf(s + off, sizeof s - off, "%salign=%s", comma,
 243                     tmp);
 244                 comma = ",";
 245         }
 246         if (sy->default_type != STYLE_DEFAULT_BASE) {
 247                 if (sy->default_type == STYLE_DEFAULT_PUSH)
 248                         tmp = "push-default";
 249                 else if (sy->default_type == STYLE_DEFAULT_POP)
 250                         tmp = "pop-default";
 251                 off += xsnprintf(s + off, sizeof s - off, "%s%s", comma, tmp);
 252                 comma = ",";
 253         }
 254         if (sy->fill != 8) {
 255                 off += xsnprintf(s + off, sizeof s - off, "%sfill=%s", comma,
 256                     colour_tostring(sy->fill));
 257                 comma = ",";
 258         }
 259         if (gc->fg != 8) {
 260                 off += xsnprintf(s + off, sizeof s - off, "%sfg=%s", comma,
 261                     colour_tostring(gc->fg));
 262                 comma = ",";
 263         }
 264         if (gc->bg != 8) {
 265                 off += xsnprintf(s + off, sizeof s - off, "%sbg=%s", comma,
 266                     colour_tostring(gc->bg));
 267                 comma = ",";
 268         }
 269         if (gc->us != 8) {
 270                 off += xsnprintf(s + off, sizeof s - off, "%sus=%s", comma,
 271                     colour_tostring(gc->us));
 272                 comma = ",";
 273         }
 274         if (gc->attr != 0) {
 275                 xsnprintf(s + off, sizeof s - off, "%s%s", comma,
 276                     attributes_tostring(gc->attr));
 277                 comma = ",";
 278         }
 279
 280         if (*s == '\0')
 281                 return ("default");
 282         return (s);
 283 }
 284
 285 /* Apply a style on top of the given style. */
 286 void
 287 style_add(struct grid_cell *gc, struct options *oo, const char *name,
 288     struct format_tree *ft)
 289 {
 290         struct style            *sy;
 291         struct format_tree      *ft0 = NULL;
 292
 293         if (ft == NULL)
 294                 ft = ft0 = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 295
 296         sy = options_string_to_style(oo, name, ft);
 297         if (sy == NULL)
 298                 sy = &style_default;
 299         if (sy->gc.fg != 8)
 300                 gc->fg = sy->gc.fg;
 301         if (sy->gc.bg != 8)
 302                 gc->bg = sy->gc.bg;
 303         if (sy->gc.us != 8)
 304                 gc->us = sy->gc.us;
 305         gc->attr |= sy->gc.attr;
 306
 307         if (ft0 != NULL)
 308                 format_free(ft0);
 309 }
 310
 311 /* Apply a style on top of the default style. */
 312 void
 313 style_apply(struct grid_cell *gc, struct options *oo, const char *name,
 314     struct format_tree *ft)
 315 {
 316         memcpy(gc, &grid_default_cell, sizeof *gc);
 317         style_add(gc, oo, name, ft);
 318 }
 319
 320 /* Initialize style from cell. */
 321 void
 322 style_set(struct style *sy, const struct grid_cell *gc)
 323 {
 324         memcpy(sy, &style_default, sizeof *sy);
 325         memcpy(&sy->gc, gc, sizeof sy->gc);
 326 }
 327
 328 /* Copy style. */
 329 void
 330 style_copy(struct style *dst, struct style *src)
 331 {
 332         memcpy(dst, src, sizeof *dst);
 333 }