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