term.h

   1 /*      $Id: term.h,v 1.129 2017/06/17 14:55:30 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2011-2015, 2017 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 AUTHORS DISCLAIM ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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
  19 enum    termenc {
  20         TERMENC_ASCII,
  21         TERMENC_LOCALE,
  22         TERMENC_UTF8
  23 };
  24
  25 enum    termtype {
  26         TERMTYPE_CHAR,
  27         TERMTYPE_PS,
  28         TERMTYPE_PDF
  29 };
  30
  31 enum    termfont {
  32         TERMFONT_NONE = 0,
  33         TERMFONT_BOLD,
  34         TERMFONT_UNDER,
  35         TERMFONT_BI,
  36         TERMFONT__MAX
  37 };
  38
  39 struct  eqn;
  40 struct  roff_meta;
  41 struct  roff_node;
  42 struct  tbl_span;
  43 struct  termp;
  44
  45 typedef void    (*term_margin)(struct termp *, const struct roff_meta *);
  46
  47 struct  termp_tbl {
  48         int               width;        /* width in fixed chars */
  49         int               decimal;      /* decimal point position */
  50 };
  51
  52 struct  termp_col {
  53         int              *buf;          /* Output buffer. */
  54         size_t            maxcols;      /* Allocated bytes in buf. */
  55         size_t            lastcol;      /* Last byte in buf. */
  56         size_t            col;          /* Byte in buf to be written. */
  57         size_t            rmargin;      /* Current right margin. */
  58         size_t            offset;       /* Current left margin. */
  59 };
  60
  61 struct  termp {
  62         struct rofftbl    tbl;          /* Table configuration. */
  63         struct termp_col *tcols;        /* Array of table columns. */
  64         struct termp_col *tcol;         /* Current table column. */
  65         size_t            maxtcol;      /* Allocated table columns. */
  66         size_t            lasttcol;     /* Last column currently used. */
  67         size_t            line;         /* Current output line number. */
  68         size_t            defindent;    /* Default indent for text. */
  69         size_t            defrmargin;   /* Right margin of the device. */
  70         size_t            lastrmargin;  /* Right margin before the last ll. */
  71         size_t            maxrmargin;   /* Max right margin. */
  72         size_t            col;          /* Byte position in buf. */
  73         size_t            viscol;       /* Chars on current line. */
  74         size_t            trailspace;   /* See term_flushln(). */
  75         size_t            minbl;        /* Minimum blanks before next field. */
  76         int               synopsisonly; /* Print the synopsis only. */
  77         int               mdocstyle;    /* Imitate mdoc(7) output. */
  78         int               ti;           /* Temporary indent for one line. */
  79         int               skipvsp;      /* Vertical space to skip. */
  80         int               flags;
  81 #define TERMP_SENTENCE   (1 << 0)       /* Space before a sentence. */
  82 #define TERMP_NOSPACE    (1 << 1)       /* No space before words. */
  83 #define TERMP_NONOSPACE  (1 << 2)       /* No space (no autounset). */
  84 #define TERMP_NBRWORD    (1 << 3)       /* Make next word nonbreaking. */
  85 #define TERMP_KEEP       (1 << 4)       /* Keep words together. */
  86 #define TERMP_PREKEEP    (1 << 5)       /* ...starting with the next one. */
  87 #define TERMP_BACKAFTER  (1 << 6)       /* Back up after next character. */
  88 #define TERMP_BACKBEFORE (1 << 7)       /* Back up before next character. */
  89 #define TERMP_NOBREAK    (1 << 8)       /* See term_flushln(). */
  90 #define TERMP_BRTRSP     (1 << 9)       /* See term_flushln(). */
  91 #define TERMP_BRIND      (1 << 10)      /* See term_flushln(). */
  92 #define TERMP_HANG       (1 << 11)      /* See term_flushln(). */
  93 #define TERMP_NOPAD      (1 << 12)      /* See term_flushln(). */
  94 #define TERMP_NOSPLIT    (1 << 13)      /* Do not break line before .An. */
  95 #define TERMP_SPLIT      (1 << 14)      /* Break line before .An. */
  96 #define TERMP_NONEWLINE  (1 << 15)      /* No line break in nofill mode. */
  97 #define TERMP_BRNEVER    (1 << 16)      /* Don't even break at maxrmargin. */
  98 #define TERMP_NOBUF      (1 << 17)      /* Bypass output buffer. */
  99 #define TERMP_NEWMC      (1 << 18)      /* No .mc printed yet. */
 100 #define TERMP_ENDMC      (1 << 19)      /* Next break ends .mc mode. */
 101 #define TERMP_MULTICOL   (1 << 20)      /* Multiple column mode. */
 102         enum termtype     type;         /* Terminal, PS, or PDF. */
 103         enum termenc      enc;          /* Type of encoding. */
 104         enum termfont     fontl;        /* Last font set. */
 105         enum termfont    *fontq;        /* Symmetric fonts. */
 106         int               fontsz;       /* Allocated size of font stack */
 107         int               fonti;        /* Index of font stack. */
 108         term_margin       headf;        /* invoked to print head */
 109         term_margin       footf;        /* invoked to print foot */
 110         void            (*letter)(struct termp *, int);
 111         void            (*begin)(struct termp *);
 112         void            (*end)(struct termp *);
 113         void            (*endline)(struct termp *);
 114         void            (*advance)(struct termp *, size_t);
 115         void            (*setwidth)(struct termp *, int, int);
 116         size_t          (*width)(const struct termp *, int);
 117         int             (*hspan)(const struct termp *,
 118                                 const struct roffsu *);
 119         const void       *argf;         /* arg for headf/footf */
 120         const char       *mc;           /* Margin character. */
 121         struct termp_ps  *ps;
 122 };
 123
 124
 125 const char       *ascii_uc2str(int);
 126
 127 void              roff_term_pre(struct termp *, const struct roff_node *);
 128
 129 void              term_eqn(struct termp *, const struct eqn *);
 130 void              term_tbl(struct termp *, const struct tbl_span *);
 131 void              term_free(struct termp *);
 132 void              term_setcol(struct termp *, size_t);
 133 void              term_newln(struct termp *);
 134 void              term_vspace(struct termp *);
 135 void              term_word(struct termp *, const char *);
 136 void              term_flushln(struct termp *);
 137 void              term_begin(struct termp *, term_margin,
 138                         term_margin, const struct roff_meta *);
 139 void              term_end(struct termp *);
 140
 141 void              term_setwidth(struct termp *, const char *);
 142 int               term_hspan(const struct termp *, const struct roffsu *);
 143 int               term_hen(const struct termp *, const struct roffsu *);
 144 int               term_vspan(const struct termp *, const struct roffsu *);
 145 size_t            term_strlen(const struct termp *, const char *);
 146 size_t            term_len(const struct termp *, size_t);
 147
 148 void              term_tab_set(const struct termp *, const char *);
 149 void              term_tab_iset(size_t);
 150 size_t            term_tab_next(size_t);
 151
 152 void              term_fontpush(struct termp *, enum termfont);
 153 void              term_fontpop(struct termp *);
 154 void              term_fontpopq(struct termp *, int);
 155 void              term_fontrepl(struct termp *, enum termfont);
 156 void              term_fontlast(struct termp *);