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# $Id: textfmt.rb,v 1.5 2003/11/04 10:57:43 sdalu Exp $
#
# AUTHOR : Stephane D'Alu <sdalu@nic.fr>
# CREATED : 2002/07/19 07:28:13
#
# COPYRIGHT: AFNIC (c) 2003
# CONTACT :
# LICENSE : RUBY
#
# $Revision: 1.5 $
# $Date: 2003/11/04 10:57:43 $
#
# INSPIRED BY:
# Austin Ziegler ruby version of the perl version of Text::Format
#
# CONTRIBUTORS: (see also CREDITS file)
#
#
module Text
module Formater
LEFT_ALIGN = 0
RIGHT_ALIGN = 1
FILLED = 2
JUSTIFY = 3
MaxLineLength = 79
#
# Draw an L-shapped box (as below) arround the text
#
# |
# |
# `----- -- -- - - -
#
def self.lbox(text, decoration=[ '|', '`', '-', ' ' ])
finalline = decoration[1] +
decoration[2]*5 + decoration[3] +
decoration[2]*2 + decoration[3] +
decoration[2]*2 + decoration[3] +
decoration[2] + decoration[3] +
decoration[2] + decoration[3]*2 +
decoration[2]
(text.split(/\n/).collect { |l|
"#{decoration[0]} #{l}" } << finalline << '').join("\n")
end
#
# Draw a title box as below
# _____________
# ,-------------.|
# ~~~~ | title || ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# `-------------'
#
def self.title(title, maxlen=MaxLineLength)
txtlen = [title.length, maxlen-20].min
txt = title[0..txtlen]
[ ' ' + '_'*(8+txtlen),
' ,' + '-'*(8+txtlen) + '.|',
'~~~~ | ' + txt + ' || ' + '~'*(maxlen-19-txtlen),
' `'+ '-' * (8+txtlen) + "'",
'' ].join("\n")
end
#
# Itemize a text as below
#
# => item1 on
# several lines
# => item2
#
def self.item(text, bullet="=> ", offset=bullet.size)
lines = text.split(/\n/)
spacer = " " * offset
([ bullet + lines[0] ] +
lines[1..-1].collect { |line| spacer + line } +
['']).join("\n")
end
def self.paragraph(text, width=78, tag=' ', style=LEFT_ALIGN)
out = [ ]
words = text.split(/\s+/)
words.shift if words[0].empty?
first_width = width - tag.size
line = words.shift
while w = words.shift
break unless (w.size + line.size) < (first_width - 1)
line << ' ' << w
end
out << build_line(line, width, tag, style, w.nil?) unless line.nil?
line = w
while w = words.shift
if (w.size + line.size < (width - 1))
line << ' ' << w
else
out << build_line(line, width,'', style, w.nil?) unless line.nil?
line = w
end
end
out << build_line(line, width, '', style, true) unless line.nil?
out.join('')
end
def self.build_line(line, width, tag='', style=LEFT_ALIGN, last=false)
case style
when JUSTIFY
return line if last || line.empty?
return line unless line =~ /\S+\s+\S+/
spaces = width - line.size - tag.size
words = line.split(/(\s+)/)
ws = spaces / (words.size / 2)
spaces = spaces % (words.size / 2) if ws > 0
words.reverse.each { |rw|
next if rw =~ /^\S/
if spaces > 0
then rw.replace((' ' * (ws+1)) + rw) ; spaces -= 1
else rw.replace((' ' * (ws) ) + rw)
end
}
tag + words.join('') + "\n"
when FILLED
"#{tag}#{line}".ljust(width) + "\n"
when RIGHT_ALIGN
"#{tag}#{line}".rjust(width) + "\n"
else
tag + line + "\n"
end
end
end
end
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