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VLNA(1)								       VLNA(1)

NAME
       vlna - adds tilde after each non-syllabic preposition

USAGE
       vlna [options] [filenames]

PREFACE
       There  exists a special Czech and Slovak typographical rule: you cannot
       leave the non-syllabic preposition on the end of one line and  continue
       writting text on next line. For example, you cannot write down the text
       "v lese" (in a forest) like "v<new-line>lese". The  program  vlna  adds
       the  asciitilde	between such preposition and the next word and removes
       the space(s) in this place.  It means, the program converts "v lese" to
       "v~lese".  You  can  use	 this program as a preporcessor before TeXing.
       Moreower, you can set another sequence to store instead asciitilte (see
       the -x option).

DESCRIPTION
       The program vlna processes one or more files, searches the non-syllabic
       prepositions  followed  by  space(s)  in	 these	files	and   converts
       this/these space(s) to asciitilde for each such occurrence.

       In  the	processed  file, the activity of the program can be blocked by
       %~- sequence and	 the  activity	can  be	 restored  again  by  the  %~+
       sequence.  These	 sequences can include spaces, it means that % ~- is a
       correct sequence too.

       The rule to recognize a preposition follows: The	 arbitrary  number  of
       opening	parentheses  can  be written before the preposition and before
       these (optional) parentheses must be the space, tabelator or  new-line.
       The  preposition itself is one-letter word, the letters have to be from
       this set: {KkSsVvZzOoUuAI}. See the -v option if	 you  want  to	change
       this  set of letters. From version 1.2, the TeX sequence can be written
       before preposition and before the brace. Example: "<new-line>([V	 lese"
       is  converted  to "<new-line>([V~lese".	Another example: "\uv{V lese}"
       is converted to "\uv{V~lese}".

       One or more blank-spaces have to be included after  preposition	before
       next  word.  The	 blank-space means space or tabelator.	One <new-line>
       can be here too.	 All these characters  are  removed  and  replaced  by
       asciitilde  (or	by  another  string,  see -x option). If <new-line> is
       deleted, another <new-line> is created before preposition  (and	before
       optional	 parentheses)  in  order  to  the  number  of  lines  is  kept
       unchanged.  Example: "... V<new-line><tabelator>lese" is	 converted  to
       "...<new-line>V~lese".

       The  program  checks  the consintence of TeX's math environments (if -m
       option isn't used). For example the "$...$$...$" sequence (it means the
       display	mode  switch  inside  the text-math mode) generates a warning.
       Empty line inside display mode generates a warning too and the  program
       processes  next	text  like in normal (non-math) mode. The existence of
       the "$" inside display mode are accepted because the constructions like
       $$..\hbox{..$..$}..$$ are allowed and common.

       The consistence of verbatim mode is checked on the end of the file.  If
       the file ends but the  verbatim	mode  does  not	 end  the  warning  is
       printed.	 This behavior can be switched off by -n or -w options.

       The   program   suppresses   the	 tilde	changing  after	 letters  like
       prepositions but they are not prepositions because the \TeX  or	\LaTeX
       sequence	 precedes.  Example: "vlastnosti \TeX u jsou" is not converted
       to "vlastnosti \TeX u~jsou", because this text is  printed  (after  TeX
       processing)  like  "vlastnosti  TeXu  jsou". The letter "u" is a suffix
       here, no preposition.

OPTIONS
       The options are	optional  and  can  be	written	 in  arbitrarty	 order
       separated by space.

       -f     Filter. The [filenames] are treated as follows:

	      vlna -f filename1 filename2
		  Input is filename1, output is filename2.

	      vlna -f filename1
		  Input is filename1, output is stdout.

	      vlna -f
		  Input is stdin, output is stdout.

	      vlna filename1 [filename2 [filename3 ...]]
		  If  the  -f  option  is  omitted then each file is processed
		  independently and it is re-written.

       -s     The silent mode. No messages, warnings, statistics are  printed.
	      Only  errors  which terminates the program untimely are printed.
	      If  this	parameter  is  omitted	then  banner,	warnings   and
	      statistics are printed to stderr.

       -r     Do not create the backups. The option -r is irrelevant if the -f
	      option is used. If the -f and -r options aren't used  then  each
	      re-written file is stored with its original contents to a backup
	      file (the name of backup file is the same as filename, only  the
	      tilde is used instead of the last character).

       -v characters
	      The  set	of  characters treated as non-syllabic prepositions is
	      declared by this option. Default: -v KkSsVvZzOoUuAI.  The	 space
	      between -v and characters is required.

       -x code
	      The  code is a string written in hexadecimal notation (even hexa
	      digits  is  required).  This  string   will   be	 saved	 after
	      prepositions  instead asciitilde which is default.  The example:
	      -x  C2A0	two  bytes  are	  stored   after   each	  non-syllabic
	      preposition, first byte has C2 code and second byte has A0 code.
	      This example means that NO-BREAK SPACE in UTF8 encoding will  be
	      used  after prepositions.	 Another example: -x 00A0 the NO-BREAK
	      SPACE in UTF16 encoding.	Another	 example:  -x  48454C4C4F  the
	      string  HELLO  will  be  used.  The space between -x and code is
	      required.

       -m     The math-modes ($...$ and $$...$$) are ignored.  It  means  that
	      non-syllabic prepositions is searched in math-mode too.  Default
	      (without -m option): no changes in math modes are	 done  because
	      (for example) "v" is variable in math-mode, no preposition.

       -n     The  verbatim  mode  (\verb<char>...<char>,  \begtt...\endtt) is
	      ignored, it means the program  can  do  a	 changes  in  verbatim
	      environment.    Default  (without	 -n  option):  no  changes  in
	      verbatim mode are done.

       -l     The LaTeX	 mode.	The  following	environments  are  treated  as
	      display	   mode:      \begin{display}...\end{display}	   and
	      \begin{equation}...\end{equation} and the following  environment
	      is treated as verbatim mode: \begin{verbatim}...\end{verbatim}.

       -w     The  web	mode  (Knuth's web, no www:-). The following sequences
	      are treated as verbatim: @<, @d...@*, @space or @>|.   It	 means
	      program  code  is	 unchanged  in	*.w  or *.web files, only web-
	      comments are processed.

EXAMPLES
       vlna -m -n -s -r file
	      The program has a behavior similar to the old vlnka program.

       vlna *.tex
	      All  files  with	.tex  suffix  in  current  directory  will  be
	      processed	  (and	possibly  changed).  (The  "*"	is  UNIX-shell
	      feautre).

       vlna -f file > /dev/null
	      Only the consistence checking of	math  and  verbatim  modes  is
	      processed.  No changes are done.

AUTHORS
       Petr  Olsak  <olsak@math.feld.cvut.cz>.	 Man page (Czech original) and
       Makefile is created by Rulolf Cejka

				 March 30 2009			       VLNA(1)
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