Add custom rules to redcloth/textile how?

Ruby
1

Hi,

has anybody successfully added custom inline tag rules to
RedCloth/textile?

Thanks!
Ingo

2

Here is all the code implementing one of the default rules.

To create custom rules would be simple:

class RedCloth
HYPERLINK = ‘(\S+?)([^\w\s/;=?]*?)(?=\s|<|$)’

TEXTILE_REFS_RE =  /(^ *)\[([^\n]+?)\](#{HYPERLINK})(?=\s|$)/

def refs_textile( text )
    text.gsub!( TEXTILE_REFS_RE ) do |m|
        @urlrefs ||= {} # in RedCloth code, initialized in

initialize, but here I am giving an example of how to extend it

        flag, url = $~[2..3]
        @urlrefs[flag.downcase] = [url, nil]
        nil
    end
end

end

textile_rules = [:refs_textile, :block_textile_table,
:block_textile_lists,
:block_textile_prefix, :inline_textile_image,
:inline_textile_link,
:inline_textile_code, :inline_textile_span,
:glyphs_textile]

redclothvar.to_html(textile_rules)

From here, figuring how to add a rule is really simple.

Define a method in class RedCloth with some RegExp action in it, call
#to_html passing an array which is a copy of the textile_rules array
in #to_html but with your rule added (array sets precedence, so it
counts where your rule is).

Reading _why’s code is a pleasure, you should try it once.

Careful: It might blow your mind and send you flying in a three headed
truck with a bouncy marmoset. Specifically, beware of Camping. That is
code on a level that might get those of us with less self confidence
to decide that perhaps shoemaking is a more befitting career.

Aur S.

3

Oh, and have a look at the adopt-a-newbie thread, here in ruby-talk :slight_smile:

Aur S.

4

Thanks so much!
Ingo

5

Oh, and have a look at the adopt-a-newbie thread, here in ruby-talk :slight_smile:

I aplologize if my question was too ‘newbie’ to send to the list. I
guess my judgement was a little off…

Ingo

6

I was merely pointing to it because I think it would benefit you and
as the current guy-in-charge of it I’m trying to spread knowledge of
it’s existence to those who might find it useful.

Oh I see! Sorry for the confusion, and thanks again. Following your
hints I got it working! Below is my code in case this is useful for
someone struggling with the same problem. Beware, the regex is probably
VERY naive!

:slight_smile: Ingo

class CustomRedCloth < RedCloth

RULES = [:inline_textile_geo, :inline_textile_span,
:inline_textile_link, :block_textile_lists, :block_textile_prefix ]

render ‘geo’ microformat (abbr pattern)

def inline_textile_geo( text )
# this: “content”:-71.34534/22.34760
text.gsub!( /"([^"]+)":(-?\d+.\d+)/(-?\d+.\d+)/ ) do |m|
content,lat,lng = $~[1…3]
# becomes this: content
“<abbr class=“geo” title=”#{lat};#{lng}">#{content}"
end
end

def to_html
super(*RULES)
end

end

7

It wasn’t. It was a perfectly OK question to ask in my opinion.

We are doing our best to help newbies learn Ruby.

The only too-newby thing would be to post another question simply
solvable by looking at the code without looking at it (what I mean is
that everything is OK as long as you learn “to fish” and not just “eat
every fish I give out”).
At least that’s how I feel. Others on the list might feel differently,
also I see this list called in many places "the kindest list on the
internet’ and I agree, form those I know.

My pointing to the adopt-a-newbie thread has nothing to do with that.

I was merely pointing to it because I think it would benefit you and
as the current guy-in-charge of it I’m trying to spread knowledge of
it’s existence to those who might find it useful.

So really, have a look - it is exactly about this, about teaching
newbies where to find solutions and how to find themselves in the
world of Ruby :slight_smile:

Aur