term.h

   1 /*      $Id: term.h,v 1.79 2011/01/05 15:37:23 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008, 2009, 2010 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 };
  27
  28 enum    termtype {
  29         TERMTYPE_CHAR,
  30         TERMTYPE_PS,
  31         TERMTYPE_PDF
  32 };
  33
  34 enum    termfont {
  35         TERMFONT_NONE = 0,
  36         TERMFONT_BOLD,
  37         TERMFONT_UNDER,
  38         TERMFONT__MAX
  39 };
  40
  41 #define TERM_MAXMARGIN    100000 /* FIXME */
  42
  43 typedef void    (*term_margin)(struct termp *, const void *);
  44
  45 struct  termp_ps {
  46         int               flags;
  47 #define PS_INLINE        (1 << 0)       /* we're in a word */
  48 #define PS_MARGINS       (1 << 1)       /* we're in the margins */
  49 #define PS_NEWPAGE       (1 << 2)       /* new page, no words yet */
  50         size_t            pscol;        /* visible column (AFM units) */
  51         size_t            psrow;        /* visible row (AFM units) */
  52         char             *psmarg;       /* margin buf */
  53         size_t            psmargsz;     /* margin buf size */
  54         size_t            psmargcur;    /* cur index in margin buf */
  55         char              last;         /* character buffer */
  56         enum termfont     lastf;        /* last set font */
  57         size_t            scale;        /* font scaling factor */
  58         size_t            pages;        /* number of pages shown */
  59         size_t            lineheight;   /* line height (AFM units) */
  60         size_t            top;          /* body top (AFM units) */
  61         size_t            bottom;       /* body bottom (AFM units) */
  62         size_t            height;       /* page height (AFM units */
  63         size_t            width;        /* page width (AFM units) */
  64         size_t            left;         /* body left (AFM units) */
  65         size_t            header;       /* header pos (AFM units) */
  66         size_t            footer;       /* footer pos (AFM units) */
  67         size_t            pdfbytes;     /* current output byte */
  68         size_t            pdflastpg;    /* byte of last page mark */
  69         size_t            pdfbody;      /* start of body object */
  70         size_t           *pdfobjs;      /* table of object offsets */
  71         size_t            pdfobjsz;     /* size of pdfobjs */
  72 };
  73
  74 struct  termp_tbl {
  75         int               width;        /* width in fixed chars */
  76         int               decimal;      /* decimal point position */
  77 };
  78
  79 struct  termp {
  80         enum termtype     type;
  81         struct rofftbl    tbl;          /* table configuration */
  82         size_t            defrmargin;   /* Right margin of the device. */
  83         size_t            rmargin;      /* Current right margin. */
  84         size_t            maxrmargin;   /* Max right margin. */
  85         size_t            maxcols;      /* Max size of buf. */
  86         size_t            offset;       /* Margin offest. */
  87         size_t            tabwidth;     /* Distance of tab positions. */
  88         size_t            col;          /* Bytes in buf. */
  89         size_t            viscol;       /* Chars on current line. */
  90         int               overstep;     /* See termp_flushln(). */
  91         int               flags;
  92 #define TERMP_SENTENCE   (1 << 1)       /* Space before a sentence. */
  93 #define TERMP_NOSPACE    (1 << 2)       /* No space before words. */
  94 #define TERMP_NOLPAD     (1 << 3)       /* See term_flushln(). */
  95 #define TERMP_NOBREAK    (1 << 4)       /* See term_flushln(). */
  96 #define TERMP_IGNDELIM   (1 << 6)       /* Delims like regulars. */
  97 #define TERMP_NONOSPACE  (1 << 7)       /* No space (no autounset). */
  98 #define TERMP_DANGLE     (1 << 8)       /* See term_flushln(). */
  99 #define TERMP_HANG       (1 << 9)       /* See term_flushln(). */
 100 #define TERMP_TWOSPACE   (1 << 10)      /* See term_flushln(). */
 101 #define TERMP_NOSPLIT    (1 << 11)      /* See termp_an_pre/post(). */
 102 #define TERMP_SPLIT      (1 << 12)      /* See termp_an_pre/post(). */
 103 #define TERMP_ANPREC     (1 << 13)      /* See termp_an_pre(). */
 104 #define TERMP_KEEP       (1 << 14)      /* Keep words together. */
 105 #define TERMP_PREKEEP    (1 << 15)      /* ...starting with the next one. */
 106         char             *buf;          /* Output buffer. */
 107         enum termenc      enc;          /* Type of encoding. */
 108         void             *symtab;       /* Encoded-symbol table. */
 109         enum termfont     fontl;        /* Last font set. */
 110         enum termfont     fontq[10];    /* Symmetric fonts. */
 111         int               fonti;        /* Index of font stack. */
 112         term_margin       headf;        /* invoked to print head */
 113         term_margin       footf;        /* invoked to print foot */
 114         void            (*letter)(struct termp *, char);
 115         void            (*begin)(struct termp *);
 116         void            (*end)(struct termp *);
 117         void            (*endline)(struct termp *);
 118         void            (*advance)(struct termp *, size_t);
 119         size_t          (*width)(const struct termp *, char);
 120         double          (*hspan)(const struct termp *,
 121                                 const struct roffsu *);
 122         const void       *argf;         /* arg for headf/footf */
 123         union {
 124                 struct termp_ps ps;
 125         } engine;
 126 };
 127
 128 struct termp     *term_alloc(enum termenc);
 129 void              term_tbl(struct termp *, const struct tbl_span *);
 130 void              term_free(struct termp *);
 131 void              term_newln(struct termp *);
 132 void              term_vspace(struct termp *);
 133 void              term_word(struct termp *, const char *);
 134 void              term_flushln(struct termp *);
 135 void              term_begin(struct termp *, term_margin,
 136                         term_margin, const void *);
 137 void              term_end(struct termp *);
 138
 139 size_t            term_hspan(const struct termp *,
 140                         const struct roffsu *);
 141 size_t            term_vspan(const struct termp *,
 142                         const struct roffsu *);
 143 size_t            term_strlen(const struct termp *, const char *);
 144 size_t            term_len(const struct termp *, size_t);
 145
 146 enum termfont     term_fonttop(struct termp *);
 147 const void       *term_fontq(struct termp *);
 148 void              term_fontpush(struct termp *, enum termfont);
 149 void              term_fontpop(struct termp *);
 150 void              term_fontpopq(struct termp *, const void *);
 151 void              term_fontrepl(struct termp *, enum termfont);
 152 void              term_fontlast(struct termp *);
 153
 154 __END_DECLS
 155
 156 #endif /*!TERM_H*/