I ran into an interesting one today. I'm trying to dynamically-size the number of rows in an 80-char wide TEXTAREA such that the default content just fits inside it. 

# pass in multi-paragraph English text
sub calculate_rows_from_content($) {
  my ($content) = @_;

  # hard wrap
  $content =~ s/([^\n]{80})/$1\n/g;

  # count newlines + 3
  my $rows = 3;
  $rows++ while ($blurb =~ /\n/g);

  return $rows;
}

[download]

Its pretty good, but not perfect (nor will it ever be without testing the user agent because different browsers hide and show the scrollbar when the content fits, changing the real width, sigh).

Wondering if anyone has a more accurate one? This one doesn't take into account whole words getting wrapped - and most likely a bunch of other things.

-Andrew.

Andrew Tomazos  |  andrew@tomazos.com  |  www.tomazos.com

In reply to Estimating height of TEXTAREA from content by tomazos

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