out.h

   1 /* $Id: out.h,v 1.34 2020/04/03 11:35:01 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2014, 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  * Utilities for use by multiple mandoc(1) formatters.
  19  */
  20
  21 enum    roffscale {
  22         SCALE_CM, /* centimeters (c) */
  23         SCALE_IN, /* inches (i) */
  24         SCALE_PC, /* pica (P) */
  25         SCALE_PT, /* points (p) */
  26         SCALE_EM, /* ems (m) */
  27         SCALE_MM, /* mini-ems (M) */
  28         SCALE_EN, /* ens (n) */
  29         SCALE_BU, /* default horizontal (u) */
  30         SCALE_VS, /* default vertical (v) */
  31         SCALE_FS, /* syn. for u (f) */
  32         SCALE_MAX
  33 };
  34
  35 struct  roffcol {
  36         size_t           width; /* width of cell */
  37         size_t           nwidth; /* max. width of number in cell */
  38         size_t           decimal; /* decimal position in cell */
  39         size_t           spacing; /* spacing after the column */
  40         int              flags; /* layout flags, see tbl_cell */
  41 };
  42
  43 struct  roffsu {
  44         enum roffscale    unit;
  45         double            scale;
  46 };
  47
  48 typedef size_t  (*tbl_sulen)(const struct roffsu *, void *);
  49 typedef size_t  (*tbl_strlen)(const char *, void *);
  50 typedef size_t  (*tbl_len)(size_t, void *);
  51
  52 struct  rofftbl {
  53         tbl_sulen        sulen; /* calculate scaling unit length */
  54         tbl_strlen       slen; /* calculate string length */
  55         tbl_len          len; /* produce width of empty space */
  56         struct roffcol  *cols; /* master column specifiers */
  57         void            *arg; /* passed to sulen, slen, and len */
  58 };
  59
  60 #define SCALE_HS_INIT(p, v) \
  61         do { (p)->unit = SCALE_EN; \
  62              (p)->scale = (v); } \
  63         while (/* CONSTCOND */ 0)
  64
  65
  66 struct  tbl_span;
  67
  68 const char       *a2roffsu(const char *, struct roffsu *, enum roffscale);
  69 void              tblcalc(struct rofftbl *,
  70                         const struct tbl_span *, size_t, size_t);