#[
The targets in the SKS use the LaTeX convention for converting ASCII
characters into standard typographical characters.  This is done
by LaTeX by default; other targets must use the transforms parameter
of Parameter_set, as defined for the m_parameters variable of the
Target_registry class.  (See file target_registry.cpp.)

The LaTeX transformations supported by the SKS are:

  --   ->  en-dash
  ---  ->  em-dash
  `    ->  open single quote
  '    ->  close single quote
  ``   ->  open double quote
  ''   ->  close double quote
  ~    ->  non-breaking space

"^" before any punctuation character quotes it (an engine rule, not an SKS
one): the character reaches the output literally, taking no part in the
transforms above -- ^-^- writes two plain hyphens (a --flag in prose), ^~ a
plain tilde.  The one exception is the apostrophe: "^" before it opens a
literal span instead (a literal apostrophe is ^0027^), and writing that
pair even in THIS comment would open one -- the span sentinels are placed
before text removal.  A target where the raw character would
still be re-interpreted declares its rendering with :resolve -- the tex
target maps a quoted hyphen to {-} (a bare -- in .tex re-forms TeX's dash
ligature) and a quoted tilde to \textasciitilde{} (a raw ~ is TeX's
non-breaking space).  Verbatim text (@c, @code, ^'...'^) never needs any
of this: neither the transforms nor the quoting reach it.

]#


@@@state Target_txt_width
  :desc Width of the text in the plain text target (txt)
  :value 72
@@@


# The txt target is not fully implemented in the SKS yet.
@@@target txt | Plain text with formatting |  
  --  -  |
  --- -- |
  ``  "  |
  ''  "  |
  `   `  |
  '   '  |
  ~   ^0020^
  :after_apply
    phases.txt_format_footnotes ;
    phases.txt_justify_blocks
@@@

@@@target html | HTML page
#  :escape < &lt; & &amp; |
|
  --- &^#x2014; |
  -- &^#x2013;  |
  `` “        |
  '' ”        |
  ` ‘         |
  ' ’         |
  ~ &^#160;
  :after_apply
    phases.html_format_footnotes
@@@

# No transforms: LaTeX applies the input conventions itself.  The :resolve
# entries say how a QUOTED character renders where the raw character would
# still be re-interpreted by TeX: ^- resolves to {-}, not a bare -, or the
# hyphens re-form a run and the dash ligature turns ^-^- into an en-dash;
# ^~ resolves to \textasciitilde{}, since a raw ~ is TeX's non-breaking
# space.  Other quoted punctuation either has an :escape entry (its marker
# takes the escape replacement: ^$ renders as \$) or decodes to the raw
# character.
@@@target tex | LaTeX
  :escape \ \textbackslash{} & \& { \{ } \} $ \$ % \% _ \_ ^# \^# ^^ \textasciicircum{}
  :resolve - {-} ~ \textasciitilde{}
@@@

@@@target pdf | PDF from LaTeX
  :includes tex
  :after_apply
     ^:cpp *KLAMMERTEXT_HOME*/sks/document/document tex_to_pdf
@@@