From: Trans <transfire@...>
Date: 2008-08-14T04:51:05+09:00
Subject: Re: script for wrapping and unwrapping text?



On Aug 13, 2:02 pm, Daniel Choi <dhc...@gmail.com> wrote:
> I'm interested in storing, say, wiki pages as flat files that can be
> edited with Vim or Emacs and also processed with line-based unix text
> tools and version control systems like Git. All these tools work much
> better with linebreaks after every line of text. For example, diffs
> are much easier to deal with when a text file has line breaks after
> every line of text.
>
> But it's awkward to edit these same files through a textarea on a
> webpage with all the line breaks. Is there a good Ruby tool or script
> that can convert a text file written in, say Markdown or Asciidoc,
> into a version that removes the line breaks for editing in a browser
> textarea and then reinserts them on the update?
>
> The problem is complicated a bit by the fact that you might want to
> preserve line breaks in some parts of a Markdown or Asciidoc document,
> like where you have a bulleted list. But you would want to wrap and
> unwrap flowing text in a paragraph or in an item of a list.

Well, here's something I've used for part of what you are asking for:

 class String

  #
  def unfold_paragraphs
    blank = false
    text  = ''
    split(/\n/).each do |line|
      if /\S/ !~ line
        text << "\n\n"
        blank = true
      else
        if /^(\s+|[*])/ =~ line
          text << (line.rstrip + "\n")
        else
          text << (line.rstrip + " ")
        end
        blank = false
      end
    end
    return text
  end

 end

T.