term.h

   1 /*      $Id: term.h,v 1.88 2011/09/19 22:36:16 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifndef TERM_H
  18 #define TERM_H
  19
  20 __BEGIN_DECLS
  21
  22 struct  termp;
  23
  24 enum    termenc {
  25         TERMENC_ASCII,
  26         TERMENC_LOCALE,
  27         TERMENC_UTF8
  28 };
  29
  30 enum    termtype {
  31         TERMTYPE_CHAR,
  32         TERMTYPE_PS,
  33         TERMTYPE_PDF
  34 };
  35
  36 enum    termfont {
  37         TERMFONT_NONE = 0,
  38         TERMFONT_BOLD,
  39         TERMFONT_UNDER,
  40         TERMFONT__MAX
  41 };
  42
  43 #define TERM_MAXMARGIN    100000 /* FIXME */
  44
  45 typedef void    (*term_margin)(struct termp *, const void *);
  46
  47 struct  termp_tbl {
  48         int               width;        /* width in fixed chars */
  49         int               decimal;      /* decimal point position */
  50 };
  51
  52 struct  termp {
  53         enum termtype     type;
  54         struct rofftbl    tbl;          /* table configuration */
  55         size_t            defrmargin;   /* Right margin of the device. */
  56         size_t            rmargin;      /* Current right margin. */
  57         size_t            maxrmargin;   /* Max right margin. */
  58         int               maxcols;      /* Max size of buf. */
  59         size_t            offset;       /* Margin offest. */
  60         size_t            tabwidth;     /* Distance of tab positions. */
  61         int               col;          /* Bytes in buf. */
  62         size_t            viscol;       /* Chars on current line. */
  63         int               overstep;     /* See termp_flushln(). */
  64         int               flags;
  65 #define TERMP_SENTENCE   (1 << 1)       /* Space before a sentence. */
  66 #define TERMP_NOSPACE    (1 << 2)       /* No space before words. */
  67 #define TERMP_NOBREAK    (1 << 4)       /* See term_flushln(). */
  68 #define TERMP_IGNDELIM   (1 << 6)       /* Delims like regulars. */
  69 #define TERMP_NONOSPACE  (1 << 7)       /* No space (no autounset). */
  70 #define TERMP_DANGLE     (1 << 8)       /* See term_flushln(). */
  71 #define TERMP_HANG       (1 << 9)       /* See term_flushln(). */
  72 #define TERMP_TWOSPACE   (1 << 10)      /* See term_flushln(). */
  73 #define TERMP_NOSPLIT    (1 << 11)      /* See termp_an_pre/post(). */
  74 #define TERMP_SPLIT      (1 << 12)      /* See termp_an_pre/post(). */
  75 #define TERMP_ANPREC     (1 << 13)      /* See termp_an_pre(). */
  76 #define TERMP_KEEP       (1 << 14)      /* Keep words together. */
  77 #define TERMP_PREKEEP    (1 << 15)      /* ...starting with the next one. */
  78         int              *buf;          /* Output buffer. */
  79         enum termenc      enc;          /* Type of encoding. */
  80         struct mchars    *symtab;       /* Encoded-symbol table. */
  81         enum termfont     fontl;        /* Last font set. */
  82         enum termfont     fontq[10];    /* Symmetric fonts. */
  83         int               fonti;        /* Index of font stack. */
  84         term_margin       headf;        /* invoked to print head */
  85         term_margin       footf;        /* invoked to print foot */
  86         void            (*letter)(struct termp *, int);
  87         void            (*begin)(struct termp *);
  88         void            (*end)(struct termp *);
  89         void            (*endline)(struct termp *);
  90         void            (*advance)(struct termp *, size_t);
  91         size_t          (*width)(const struct termp *, int);
  92         double          (*hspan)(const struct termp *,
  93                                 const struct roffsu *);
  94         const void       *argf;         /* arg for headf/footf */
  95         struct termp_ps  *ps;
  96 };
  97
  98 void              term_eqn(struct termp *, const struct eqn *);
  99 void              term_tbl(struct termp *, const struct tbl_span *);
 100 void              term_free(struct termp *);
 101 void              term_newln(struct termp *);
 102 void              term_vspace(struct termp *);
 103 void              term_word(struct termp *, const char *);
 104 void              term_flushln(struct termp *);
 105 void              term_begin(struct termp *, term_margin,
 106                         term_margin, const void *);
 107 void              term_end(struct termp *);
 108
 109 size_t            term_hspan(const struct termp *,
 110                         const struct roffsu *);
 111 size_t            term_vspan(const struct termp *,
 112                         const struct roffsu *);
 113 size_t            term_strlen(const struct termp *, const char *);
 114 size_t            term_len(const struct termp *, size_t);
 115
 116 enum termfont     term_fonttop(struct termp *);
 117 const void       *term_fontq(struct termp *);
 118 void              term_fontpush(struct termp *, enum termfont);
 119 void              term_fontpop(struct termp *);
 120 void              term_fontpopq(struct termp *, const void *);
 121 void              term_fontrepl(struct termp *, enum termfont);
 122 void              term_fontlast(struct termp *);
 123
 124 __END_DECLS
 125
 126 #endif /*!TERM_H*/