string#fmt - breaking lines (no indent)

[Josef 'Jupp' SCHUGT]

Hi!

After some trouble with mail programs not supporting "format=flowed" I
wrote a quick hack that line-breaks strings but keeps words intact
that exceed the intended line-length (currently hard-wired to 72 - I
already wrote that it is a quick hack, didn't I?). No warranty of any
kind. Improvements welcome. I did not forget to implement indentations
- the strings that I apply String#fmt to simply don't have them.

class String
def fmt
maxlen = 72
result = ""
temp = ""
gsub(/[ \s]+/, ' ').strip.scan(/[^ ]+/) { |x|
if temp == ""
temp << x
else
if temp.length + x.length < maxlen
temp << " " + x
else
result << temp + "\n"
temp = ""
redo
end
end
}
result + temp
end
end

Josef 'Jupp' Schugt

 

[Ara.T.Howard]

Hi!

After some trouble with mail programs not supporting "format=flowed" I
wrote a quick hack that line-breaks strings but keeps words intact
that exceed the intended line-length (currently hard-wired to 72 - I
already wrote that it is a quick hack, didn't I?). No warranty of any
kind. Improvements welcome. I did not forget to implement indentations
- the strings that I apply String#fmt to simply don't have them.

class String
def fmt
maxlen = 72
result = ""
temp = ""
gsub(/[ \s]+/, ' ').strip.scan(/[^ ]+/) { |x|
if temp == ""
temp << x
else
if temp.length + x.length < maxlen
temp << " " + x
else
result << temp + "\n"
temp = ""
redo
end
end
}
result + temp
end
end

for anyone wanting to make a really robust version i'm contributing my code to
do the same too:

module Util
#
# wrap a string using options width (default 80) and indent using the indent
# option (default 0)
#
def columnize buf, opts = {}
#--{{{
width = getopt 'width', opts, 80
indent = getopt 'indent', opts, 0
columns = []
words = buf.split %r/\s+/o
row = ' ' * indent
while((word = words.shift))
if((row.size + word.size) < (width - 1))
row << word
else
columns << row
row = ' ' * indent
row << word
end
row << ' ' unless row.size == (width - 1)
end
columns << row unless row.strip.empty?
columns.join "\n"
#--}}}
end
#
# look up key in hash as key, then string of key, then intern of key -
# returning the value or, if key is not found, nil or default
#
def getopt opt, hash, default = nil
#--{{{
key = opt
return hash[key] if hash.has_key? key
key = "#{ key }"
return hash[key] if hash.has_key? key
key = key.intern
return hash[key] if hash.has_key? key
return default
#--}}}
end
end


improvements welcome.


-a
--
===============================================================================
| email :: ara [dot] t [dot] howard [at] noaa [dot] gov
| phone :: 303.497.6469
| renunciation is not getting rid of the things of this world, but accepting
| that they pass away. --aitken roshi
===============================================================================

 

[nobu.nokada]

Hi,

At Fri, 29 Apr 2005 01:44:17 +0900,
Josef 'Jupp' SCHUGT wrote in [ruby-talk:140291]:

After some trouble with mail programs not supporting "format=flowed" I
wrote a quick hack that line-breaks strings but keeps words intact
that exceed the intended line-length (currently hard-wired to 72 - I
already wrote that it is a quick hack, didn't I?). No warranty of any
kind. Improvements welcome. I did not forget to implement indentations
- the strings that I apply String#fmt to simply don't have them.

wrap.rb <http://www.ruby-lang.org/cgi-bin/cvsweb.cgi/rough/lib/wrap.rb>