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);
use Text::Wrap qw(wrap $columns $huge); $columns = 132; # Wrap at 132 characters $huge = 'die'; $huge = 'wrap'; $huge = 'overflow';
use Text::Wrap; $Text::Wrap::columns = 72; print wrap('', '', @text);
"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 destroy 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().
"wrap()" compresses trailing whitespace into one newline, and "fill()" deletes all trailing whitespace.
Both "wrap()" and "fill()" return a single string.
Unlike the old Unix fmt(1) utility, this module correctly accounts for any Unicode combining characters (such as diacriticals) that may occur in each line for both expansion and unexpansion. These are overstrike characters that do not increment the logical position. Make sure you have the appropriate Unicode settings enabled.
Lines are wrapped at $Text::Wrap::columns columns (default value: 76). $Text::Wrap::columns should be set to the full width of your output device. In fact, every resulting line will have length of no more than "$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.) Setting $Text::Wrap::break to a regular expression that doesn't eat any characters (perhaps just a forward look-ahead assertion) will cause warnings.
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::unexpand 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::separator to your preference. This replaces all newlines with $Text::Wrap::separator. If you just want to preserve existing newlines but add new breaks with something else, set $Text::Wrap::separator2 instead.
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.
print wrap("\t","",<<END); This is a bit of text that forms a normal book-style indented paragraph END
" This is a bit of text that forms a normal book-style indented paragraph "
$Text::Wrap::columns=20; $Text::Wrap::separator="|"; print wrap("","","This is a bit of text that forms a normal book-style paragraph");
"This is a bit of|text that forms a|normal book-style|paragraph"