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Text::Wrap(3)
NAME
Text::Wrap - line wrapping to form simple paragraphs
SYNOPSIS
Example 1
use Text::Wrap
$initial_tab = "\t"; # Tab before first line
$subsequent_tab = ""; # All other lines flush left
print wrap($initial_tab, $subsequent_tab, @text);
print fill($initial_tab, $subsequent_tab, @text);
@lines = wrap($initial_tab, $subsequent_tab, @text);
@paragraphs = fill($initial_tab, $subsequent_tab, @text);
Example 2
use Text::Wrap qw(wrap $columns $huge);
$columns = 132; # Wrap at 132 characters
$huge = 'die';
$huge = 'wrap';
$huge = 'overflow';
Example 3
use Text::Wrap
$Text::Wrap::columns = 72;
print wrap('', '', @text);
DESCRIPTION
"Text::Wrap::wrap()" is a very simple paragraph formatter. It formats a
single paragraph at a time by breaking lines at word boundries.
Indentation is controlled for the first line ($initial_tab) and all
subsequent lines ($subsequent_tab) independently. Please note:
$initial_tab and $subsequent_tab are the literal strings that will be used:
it is unlikley you would want to pass in a number.
Text::Wrap::fill() is a simple multi-paragraph formatter. It formats each
paragraph separately and then joins them together when it's done. It will
destory any whitespace in the original text. It breaks text into
paragraphs by looking for whitespace after a newline. In other respects it
acts like wrap().
OVERRIDES
"Text::Wrap::wrap()" has a number of variables that control its behavior.
Because other modules might be using "Text::Wrap::wrap()" it is suggested
that you leave these variables alone! If you can't do that, then use
"local($Text::Wrap::VARIABLE) = YOURVALUE" when you change the values so
that the original value is restored. This "local()" trick will not work if
you import the variable into your own namespace.
Lines are wrapped at $Text::Wrap::columns columns. $Text::Wrap::columns
should be set to the full width of your output device. In fact, every
resulting line will have length of no more than "$columns - 1".
It is possible to control which characters terminate words by modifying
$Text::Wrap::break. Set this to a string such as '[\s:]' (to break before
spaces or colons) or a pre-compiled regexp such as "qr/[\s']/" (to break
before spaces or apostrophes). The default is simply '\s'; that is, words
are terminated by spaces. (This means, among other things, that trailing
punctuation such as full stops or commas stay with the word they are
"attached" to.)
Beginner note: In example 2, above $columns is imported into the local
namespace, and set locally. In example 3, $Text::Wrap::columns is set in
its own namespace without importing it.
"Text::Wrap::wrap()" starts its work by expanding all the tabs in its input
into spaces. The last thing it does it to turn spaces back into tabs. If
you do not want tabs in your results, set $Text::Wrap::unexapand to a false
value. Likewise if you do not want to use 8-character tabstops, set
$Text::Wrap::tabstop to the number of characters you do want for your
tabstops.
If you want to separate your lines with something other than "\n" then set
$Text::Wrap::seporator to your preference.
When words that are longer than $columns are encountered, they are broken
up. "wrap()" adds a "\n" at column $columns. This behavior can be
overridden by setting $huge to 'die' or to 'overflow'. When set to 'die',
large words will cause "die()" to be called. When set to 'overflow', large
words will be left intact.
Historical notes: 'die' used to be the default value of $huge. Now, 'wrap'
is the default value.
EXAMPLE
print wrap("\t","","This is a bit of text that forms
a normal book-style paragraph");
AUTHOR
David Muir Sharnoff <muir@idiom.com> with help from Tim Pierce and many
many others.
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