mirror of https://github.com/texmacs/doc.git
Doc: convert verbatim to scm-code/cpp-code for fonts.en.tm
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Darcy Shen
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<TeXmacs|1.99.8>
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<TeXmacs|1.99.18>
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<style|<tuple|tmdoc|english|old-spacing>>
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<style|<tuple|tmdoc|english|old-spacing|old-dots|old-lengths>>
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<\body>
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<tmdoc-title|<TeXmacs> fonts>
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@ -115,55 +115,54 @@
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The main abstract <verbatim|font> class is defined in <verbatim|font.hpp>:\
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<\verbatim>
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\ \ \ \ struct font_rep: rep\<less\>font\<gtr\> {<next-line>
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\ \ \ \ \ display \ dis; \ \ \ \ \ \ \ \ \ \ \ \ \ // underlying
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display<next-line> \ \ \ \ \ encoding enc; \ \ \ \ \ \ \ \ \ \ \ \ \ //
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underlying encoding of the font<next-line> \ \ \ \ \ SI
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\ \ \ \ \ \ design_size; \ \ \ \ \ // design size in
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points/256<next-line> \ \ \ \ \ SI \ \ \ \ \ \ display_size; \ \ \ \ //
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display size in points/PIXEL<next-line> \ \ \ \ \ double \ \ slope;
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\ \ \ \ \ \ \ \ \ \ \ // italic slope<next-line> \ \ \ \ \ space
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\ \ \ spc; \ \ \ \ \ \ \ \ \ \ \ \ \ // usual space between
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words<next-line> \ \ \ \ \ space \ \ \ extra; \ \ \ \ \ \ \ \ \ \ \ //
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extra space at end of words<next-line><next-line> \ \ \ \ \ SI
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\ \ \ \ \ \ y1; \ \ \ \ \ \ \ \ \ \ \ \ \ \ // bottom y
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position<next-line> \ \ \ \ \ SI \ \ \ \ \ \ y2;
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\ \ \ \ \ \ \ \ \ \ \ \ \ \ // top y position<next-line> \ \ \ \ \ SI
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\ \ \ \ \ \ yfrac; \ \ \ \ \ \ \ \ \ \ \ // vertical position fraction
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bar<next-line> \ \ \ \ \ SI \ \ \ \ \ \ ysub; \ \ \ \ \ \ \ \ \ \ \ \ //
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base line for subscripts<next-line> \ \ \ \ \ SI \ \ \ \ \ \ ysup;
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<\cpp-code>
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struct font_rep: rep\<less\>font\<gtr\> {<next-line> \ display \ dis;
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\ \ \ \ \ \ \ \ \ \ \ \ \ // underlying display<next-line> \ encoding
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enc; \ \ \ \ \ \ \ \ \ \ \ \ \ // underlying encoding of the
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font<next-line> \ SI \ \ \ \ \ \ design_size; \ \ \ \ \ // design size in
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points/256<next-line> \ SI \ \ \ \ \ \ display_size; \ \ \ \ // display
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size in points/PIXEL<next-line> \ double \ \ slope;
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\ \ \ \ \ \ \ \ \ \ \ // italic slope<next-line> \ space \ \ \ spc;
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\ \ \ \ \ \ \ \ \ \ \ \ \ // usual space between words<next-line> \ space
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\ \ \ extra; \ \ \ \ \ \ \ \ \ \ \ // extra space at end of
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words<next-line><next-line> \ SI \ \ \ \ \ \ y1;
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\ \ \ \ \ \ \ \ \ \ \ \ \ \ // bottom y position<next-line> \ SI
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\ \ \ \ \ \ y2; \ \ \ \ \ \ \ \ \ \ \ \ \ \ // top y position<next-line>
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\ SI \ \ \ \ \ \ yfrac; \ \ \ \ \ \ \ \ \ \ \ // vertical position
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fraction bar<next-line> \ SI \ \ \ \ \ \ ysub; \ \ \ \ \ \ \ \ \ \ \ \ //
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base line for subscripts<next-line> \ SI \ \ \ \ \ \ ysup;
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\ \ \ \ \ \ \ \ \ \ \ \ // base line for
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superscripts<next-line><next-line> \ \ \ \ \ SI \ \ \ \ \ \ wpt;
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\ \ \ \ \ \ \ \ \ \ \ \ \ // width of one point in font<next-line>
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\ \ \ \ \ SI \ \ \ \ \ \ wquad; \ \ \ \ \ \ \ \ \ \ \ // wpt * design
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size in points<next-line> \ \ \ \ \ SI \ \ \ \ \ \ wunit;
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\ \ \ \ \ \ \ \ \ \ \ // unit width for extendable fonts<next-line>
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\ \ \ \ \ SI \ \ \ \ \ \ wfrac; \ \ \ \ \ \ \ \ \ \ \ // width fraction
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bar<next-line> \ \ \ \ \ SI \ \ \ \ \ \ wsqrt; \ \ \ \ \ \ \ \ \ \ \ //
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width horzontal line in square root<next-line> \ \ \ \ \ SI
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\ \ \ \ \ \ wneg; \ \ \ \ \ \ \ \ \ \ \ \ // width of negation
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line<next-line><next-line> \ \ \ \ \ font_rep (display dis, string
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name);<next-line> \ \ \ \ \ font_rep (display dis, string name, font
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fn);<next-line> \ \ \ \ \ void copy_math_pars (font
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fn);<next-line><next-line> \ \ \ \ \ virtual void \ \ get_extents (string
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s, text_extents& ex) = 0;<next-line> \ \ \ \ \ virtual void \ \ draw
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(ps_device dev, string s, SI x, SI y) = 0;<next-line><next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_sub_base (string s);<next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_sup_base (string s);<next-line>
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\ \ \ \ \ virtual double get_left_slope \ (string s);<next-line>
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\ \ \ \ \ virtual double get_right_slope (string s);<next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_left_correction \ (string s);<next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_right_correction (string s);<next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_lsub_correction (string s, double
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level);<next-line> \ \ \ \ \ virtual SI \ \ \ \ get_lsup_correction
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(string s, double level);<next-line> \ \ \ \ \ virtual SI
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\ \ \ \ get_rsub_correction (string s, double level);<next-line>
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\ \ \ \ \ virtual SI \ \ \ \ get_rsup_correction (string s, double
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level);<next-line><next-line> \ \ \ \ void var_get_extents (string s,
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text_extents& ex);<next-line> \ \ \ \ void var_draw (ps_device dev,
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string s, SI x, SI y);<next-line> \ \ \ \ virtual bitmap_char get_bitmap
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(string s);<next-line> \ \ };
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superscripts<next-line><next-line> \ SI \ \ \ \ \ \ wpt;
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\ \ \ \ \ \ \ \ \ \ \ \ \ // width of one point in font<next-line> \ SI
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\ \ \ \ \ \ wquad; \ \ \ \ \ \ \ \ \ \ \ // wpt * design size in
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points<next-line> \ SI \ \ \ \ \ \ wunit; \ \ \ \ \ \ \ \ \ \ \ // unit
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width for extendable fonts<next-line> \ SI \ \ \ \ \ \ wfrac;
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\ \ \ \ \ \ \ \ \ \ \ // width fraction bar<next-line> \ SI
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\ \ \ \ \ \ wsqrt; \ \ \ \ \ \ \ \ \ \ \ // width horzontal line in
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square root<next-line> \ SI \ \ \ \ \ \ wneg; \ \ \ \ \ \ \ \ \ \ \ \ //
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width of negation line<next-line><next-line> \ font_rep (display dis,
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string name);<next-line> \ font_rep (display dis, string name, font
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fn);<next-line> \ void copy_math_pars (font fn);<next-line><next-line>
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\ virtual void \ \ get_extents (string s, text_extents& ex) =
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0;<next-line> \ virtual void \ \ draw (ps_device dev, string s, SI x, SI
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y) = 0;<next-line><next-line> \ virtual SI \ \ \ \ get_sub_base (string
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s);<next-line> \ virtual SI \ \ \ \ get_sup_base (string s);<next-line>
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\ virtual double get_left_slope \ (string s);<next-line> \ virtual double
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get_right_slope (string s);<next-line> \ virtual SI
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\ \ \ \ get_left_correction \ (string s);<next-line> \ virtual SI
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\ \ \ \ get_right_correction (string s);<next-line> \ virtual SI
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\ \ \ \ get_lsub_correction (string s, double level);<next-line>
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\ virtual SI \ \ \ \ get_lsup_correction (string s, double
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level);<next-line> \ virtual SI \ \ \ \ get_rsub_correction (string s,
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double level);<next-line> \ virtual SI \ \ \ \ get_rsup_correction
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(string s, double level);<next-line><next-line> \ void var_get_extents
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(string s, text_extents& ex);<next-line> \ void var_draw (ps_device dev,
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string s, SI x, SI y);<next-line> \ virtual bitmap_char get_bitmap
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(string s);<next-line>};
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</cpp-code>
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<\verbatim>
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\ \ \ \
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</verbatim>
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The main abstract routines are <verbatim|get_extents> and <verbatim|draw>.
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@ -209,27 +208,27 @@
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At the lowest level, we provide a fixed number of macros which directly
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correspond to the above types of concrete fonts. For instance, the macro\
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<\verbatim>
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<\scm>
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\ \ \ \ (tex $name $size $dpi)
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</verbatim>
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</scm>
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corresponds to the constructor\
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corresponds to the constructor
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<\verbatim>
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\ \ \ \ font tex_font (display dis, string fam, int size, int dpi, int
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dsize=10);
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</verbatim>
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<\cpp-code>
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font tex_font (display dis, string fam, int size, int dpi, int dsize=10);
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</cpp-code>
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of a <TeX> text font.
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At the middle level, it is possible to specify some rewriting rules like\
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<\verbatim>
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\ \ \ \ ((roman rm medium right $s $d) (ec ecrm $s $d))<next-line>
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\ \ \ ((avant-garde rm medium right $s $d) (tex rpagk $s $d
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0))<next-line> \ \ \ ((x-times rm medium right $s $d) (ps
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adobe-times-medium-r-normal $s $d))
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</verbatim>
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<\scm-code>
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((roman rm medium right $s $d) (ec ecrm $s $d))
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((avant-garde rm medium right $s $d) (tex rpagk $s $d 0))
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((x-times rm medium right $s $d) (ps adobe-times-medium-r-normal $s $d))
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</scm-code>
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When a left hand pattern is matched, it is recursively substituted by the
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right hand side. The files in the directory <verbatim|progs/fonts> contain
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@ -237,15 +236,15 @@
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At the top level, <TeXmacs> calls a macro of the form\
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<\verbatim>
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\ \ \ \ ($name $family $series $shape $size $dpi)
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</verbatim>
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<\scm-code>
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($name $family $series $shape $size $dpi)
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</scm-code>
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as a function of the current environment in the text. In the future, the
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top level macro call might change in order to enable the user to let the
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font depend on other environment variables.
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<tmdoc-copyright|1998--2002|Joris van der Hoeven>
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<tmdoc-copyright|1998\U2021|Joris van der Hoeven|Darcy Shen>
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<tmdoc-license|Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version 1.1
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