fontwrap package for XeLaTex
                ----------------------------
                Michiel Kamermans, june 2008
                     Available under GPL


What is it?
  --------------

    fontwrap is a package for XeLaTeX to automatically
    wrap multilingual utf8 encoded text in approriate
    font tags, issuing fontspec commands whenever text
    switches from one unicode block to another. As most
    of us use TeX in order to separate visual styling
    from the actual document as much as possible, this
    package removes the need to add fonttags all over
    the place when writing multilingual documents.


... Example?
  --------------

    Say you have a mixed text of English and Japanese,
    going something like this:

    "English and nihongo can both be written in utf8"

    with the word "nihongo" written in Japanes.
    the fontwrap package can automatically change
    this to the following:

    "\fontspec{SomeFont}English and \fontspec{OtherFont}
    nihongo\fontspec{SomeFont}\ can both be written in
    utf8"

    where 'SomeFont' is a font you picked for English
    - or rather, Latin - text, and 'OtherFont' is a
    font you picked for Japanese text.


How do I use it?
  --------------

    simply use the fontwrap package like any other, and
    wrap whichever text you want automatically font tagged
    with the following command:

      \fontwrap{...your text here...}

    Both the fontwrap.tex and fontwrap_example.tex files
    contain examples of this.

    Of course, fontwrap needs to know which fonts you want
    to use for which blocks, for which there are a few
    basic commands:

      \setfontwrapdefaultfont{Font Name}

    where 'Font Name' is the name of the font as you'd use
    it in a word processor (and capitalisation counts!). To
    then override the default, you can set fonts either for
    single unicode blocks, or for entire informal unicode
    groups:

      \setunicodeblockfont{BLock Name}{Font Name}

      \setunicodegroupfont{BLock Name}{Font Name}

    There are a small number of groups to pick from (namely
    Arabic, Chinese, CJK (which combines all Chinese,
    Japanese and Korean blocks), Cyrillic, Diacritics,
    Greek (including some Coptic), Korean, Japanese, Latin,
    Mathematics, Phonetics, Punctuation, Symbols, Yi and
    'Other'). There are few more blocks (158 of them), so
    I won't list all of there here - please see the more
    detailed pdf documentation for which specific blocks
    you can set fonts for.

    In addition to these fonts, you also need to instruct
    fontwrap which macros and environments it is allowed
    to process the content of, because by default it will
    skip over any macros or environments it is wrapping.

      \setfontwrapallowedmacros{macro list}

      \setfontwrapallowedenvironments{env. list}

    For both these commands, the lists are comma delimited,
    so that if you want fontwrap to process the content of
    emph, ruby and section macros, you would pass it the
    list "emph,ruby,section".


Special notes
  --------------
  
    This package requires you use perltex, which is just
    a wrapper for xelatex. if you use Tex Live or MikTeX
    then you should either already have it installed,
    or it should grab perltex automatically for you. 
    The command is also rather simple:

      perltex --latex=xelatex inputfile.tex

    Running this when using fontwrap may result in a
    number of warnings/errors:
    
    1) free to wrong pool
    
    perltex can, in some cases, perform mem cleanup on
    the wrong thread. This will not affect your document
    in any way. it's just annoying.
    
    2) no unicode mapping available
    
    a font you picked for some block of text does not
    contain the characters of that text. this is common
    when using foreign language in a verbatim block.