Text::LineFold(3)

NAME
Text::LineFold - Line Folding for Plain Text

SYNOPSIS
    use Text::LineFold;
    $lf = Text::LineFold->new();

    # Fold lines
    $folded = $lf->fold($string, 'PLAIN');
    $indented = $lf->fold(' ' x 8, ' ' x 4, $string);

    # Unfold lines
    $unfolded = $lf->unfold($string, 'FIXED');

DESCRIPTION
Text::LineFold folds or unfolds lines of plain text. As it mainly focuses on plain text e-mail messages, RFC 3676 flowed format is also supported.

  Public Interface

new ([KEY => VALUE, ...])
    Constructor. About KEY => VALUE pairs see config method.

$self->config (KEY)
$self->config ([KEY => VAL, ...])
    Instance method. Get or update configuration. Following KEY => VALUE pairs may be specified.

    Charset => CHARSET
        Character set that is used to encode string. It may be string or MIME::Charset object. Default is "UTF-8".

    Language => LANGUAGE
        Along with Charset option, this may be used to define language/region context. Default is "XX". See also "Context" in Unicode::LineBreak option.

    Newline => STRING
        String to be used for newline sequence. Default is "\n".

    OutputCharset => CHARSET
        Character set that is used to encode result of fold()/unfold(). It may be string or MIME::Charset object. If a special value "_UNICODE_" is specified, result will be Unicode string. Default is the value of Charset option.

    TabSize => NUMBER
        Column width of tab stops. When 0 is specified, tab stops are ignored. Default is 8.

    BreakIndent
    CharMax
    ColMax
    ColMin
    ComplexBreaking
    EAWidth
    HangulAsAL
    LBClass
    LegacyCM
    Prep
    Urgent
        See "Options" in Unicode::LineBreak.

$self->fold (STRING, [METHOD])
$self->fold (INITIAL_TAB, SUBSEQUENT_TAB, STRING, ...)
    Instance method. fold() folds lines of string STRING and returns it. Surplus SPACEs and horizontal tabs at end of line are removed, newline sequences are replaced by that specified by Newline option and newline is appended at end of text if it does not exist. Horizontal tabs are treated as tab stops according to TabSize option.

    By the first style, following options may be specified for METHOD argument.

    "FIXED"
        Lines preceded by ">" won't be folded. Paragraphs are separated by empty line.

    "FLOWED"
        "Format=Flowed; DelSp=Yes" formatting defined by RFC 3676.

    "PLAIN"
        Default method. All lines are folded.

    Second style is similar to "wrap()" in Text::Wrap. All lines are folded. INITIAL_TAB is inserted at beginning of paragraphs and SUBSEQUENT_TAB at beginning of other broken lines.

$self->unfold (STRING, METHOD)
    Conjunct folded paragraphs of string STRING and returns it.

    Following options may be specified for METHOD argument.

    "FIXED"
        Default method. Lines preceded by ">" won't be conjuncted. Treat empty line as paragraph separator.

    "FLOWED"
        Unfold "Format=Flowed; DelSp=Yes" formatting defined by RFC 3676.

    "FLOWEDSP"
        Unfold "Format=Flowed; DelSp=No" formatting defined by RFC 3676.

BUGS
Please report bugs or buggy behaviors to developer.

CPAN Request Tracker: <http://rt.cpan.org/Public/Dist/Display.html?Name=Unicode-LineBreak>.

VERSION
Consult $VERSION variable.

SEE ALSO
Unicode::LineBreak, Text::Wrap.

AUTHOR
Copyright (C) 2009-2012 Hatuka*nezumi - IKEDA Soji <hatuka(at)nezumi.nu>.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.