tbl_html.c

   1 /*      $Id: tbl_html.c,v 1.28 2018/11/26 01:51:46 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2014, 2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #include "config.h"
  19
  20 #include <sys/types.h>
  21
  22 #include <assert.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "mandoc.h"
  28 #include "out.h"
  29 #include "html.h"
  30
  31 static  void     html_tblopen(struct html *, const struct tbl_span *);
  32 static  size_t   html_tbl_len(size_t, void *);
  33 static  size_t   html_tbl_strlen(const char *, void *);
  34 static  size_t   html_tbl_sulen(const struct roffsu *, void *);
  35
  36
  37 static size_t
  38 html_tbl_len(size_t sz, void *arg)
  39 {
  40         return sz;
  41 }
  42
  43 static size_t
  44 html_tbl_strlen(const char *p, void *arg)
  45 {
  46         return strlen(p);
  47 }
  48
  49 static size_t
  50 html_tbl_sulen(const struct roffsu *su, void *arg)
  51 {
  52         if (su->scale < 0.0)
  53                 return 0;
  54
  55         switch (su->unit) {
  56         case SCALE_FS:  /* 2^16 basic units */
  57                 return su->scale * 65536.0 / 24.0;
  58         case SCALE_IN:  /* 10 characters per inch */
  59                 return su->scale * 10.0;
  60         case SCALE_CM:  /* 2.54 cm per inch */
  61                 return su->scale * 10.0 / 2.54;
  62         case SCALE_PC:  /* 6 pica per inch */
  63         case SCALE_VS:
  64                 return su->scale * 10.0 / 6.0;
  65         case SCALE_EN:
  66         case SCALE_EM:
  67                 return su->scale;
  68         case SCALE_PT:  /* 12 points per pica */
  69                 return su->scale * 10.0 / 6.0 / 12.0;
  70         case SCALE_BU:  /* 24 basic units per character */
  71                 return su->scale / 24.0;
  72         case SCALE_MM:  /* 1/1000 inch */
  73                 return su->scale / 100.0;
  74         default:
  75                 abort();
  76         }
  77 }
  78
  79 static void
  80 html_tblopen(struct html *h, const struct tbl_span *sp)
  81 {
  82         if (h->tbl.cols == NULL) {
  83                 h->tbl.len = html_tbl_len;
  84                 h->tbl.slen = html_tbl_strlen;
  85                 h->tbl.sulen = html_tbl_sulen;
  86                 tblcalc(&h->tbl, sp, 0, 0);
  87         }
  88         assert(NULL == h->tblt);
  89         h->tblt = print_otag(h, TAG_TABLE, "c", "tbl");
  90 }
  91
  92 void
  93 print_tblclose(struct html *h)
  94 {
  95
  96         assert(h->tblt);
  97         print_tagq(h, h->tblt);
  98         h->tblt = NULL;
  99 }
 100
 101 void
 102 print_tbl(struct html *h, const struct tbl_span *sp)
 103 {
 104         const struct tbl_dat    *dp;
 105         struct tag              *tt;
 106         const char              *hspans, *vspans, *halign, *valign;
 107         char                     hbuf[4], vbuf[4];
 108
 109         /* Inhibit printing of spaces: we do padding ourselves. */
 110
 111         if (h->tblt == NULL)
 112                 html_tblopen(h, sp);
 113
 114         assert(h->tblt);
 115
 116         h->flags |= HTML_NONOSPACE;
 117         h->flags |= HTML_NOSPACE;
 118
 119         tt = print_otag(h, TAG_TR, "");
 120
 121         switch (sp->pos) {
 122         case TBL_SPAN_HORIZ:
 123         case TBL_SPAN_DHORIZ:
 124                 print_otag(h, TAG_TD, "?", "colspan", "0");
 125                 break;
 126         default:
 127                 for (dp = sp->first; dp != NULL; dp = dp->next) {
 128                         print_stagq(h, tt);
 129
 130                         /*
 131                          * Do not generate <td> elements for continuations
 132                          * of spanned cells.  Larger <td> elements covering
 133                          * this space were already generated earlier.
 134                          */
 135
 136                         if (dp->layout->pos == TBL_CELL_SPAN ||
 137                             dp->layout->pos == TBL_CELL_DOWN ||
 138                             (dp->string != NULL &&
 139                              strcmp(dp->string, "\\^") == 0))
 140                                 continue;
 141
 142                         /* Determine the attribute values. */
 143
 144                         if (dp->hspans > 0) {
 145                                 (void)snprintf(hbuf, sizeof(hbuf),
 146                                     "%d", dp->hspans + 1);
 147                                 hspans = hbuf;
 148                         } else
 149                                 hspans = NULL;
 150                         if (dp->vspans > 0) {
 151                                 (void)snprintf(vbuf, sizeof(vbuf),
 152                                     "%d", dp->vspans + 1);
 153                                 vspans = vbuf;
 154                         } else
 155                                 vspans = NULL;
 156
 157                         switch (dp->layout->pos) {
 158                         case TBL_CELL_CENTRE:
 159                                 halign = "center";
 160                                 break;
 161                         case TBL_CELL_RIGHT:
 162                         case TBL_CELL_NUMBER:
 163                                 halign = "right";
 164                                 break;
 165                         default:
 166                                 halign = NULL;
 167                                 break;
 168                         }
 169                         if (dp->layout->flags & TBL_CELL_TALIGN)
 170                                 valign = "top";
 171                         else if (dp->layout->flags & TBL_CELL_BALIGN)
 172                                 valign = "bottom";
 173                         else
 174                                 valign = NULL;
 175
 176                         /* Print the element and the attributes. */
 177
 178                         print_otag(h, TAG_TD, "??ss",
 179                             "colspan", hspans, "rowspan", vspans,
 180                             "vertical-align", valign,
 181                             "text-align", halign);
 182                         if (dp->string != NULL)
 183                                 print_text(h, dp->string);
 184                 }
 185                 break;
 186         }
 187
 188         print_tagq(h, tt);
 189
 190         h->flags &= ~HTML_NONOSPACE;
 191
 192         if (sp->next == NULL) {
 193                 assert(h->tbl.cols);
 194                 free(h->tbl.cols);
 195                 h->tbl.cols = NULL;
 196                 print_tblclose(h);
 197         }
 198 }