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#custom filters for Octopress |
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require './plugins/pygments_code' |
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module OctopressFilters |
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include HighlightCode |
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# Used on the blog index to split posts on the <!--more--> marker |
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def excerpt(input) |
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if input.index(/<!--\s*more\s*-->/i)
input.split(/<!--\s*more\s*-->/i)[0] |
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else
input
end
end |
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# Summary is used on the Archive pages to return the first block of content from a post.
def summary(input)
if input.index(/\n\n/)
input.split(/\n\n/)[0] |
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else
input
end
end |
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|
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# for Github style codeblocks eg.
# ``` ruby
# code snippet
# ```
def backtick_codeblock(input)
input.gsub /<p>`{3}\s(\w+)<\/p>.+<pre><code>(.+)<\/code><\/pre>.+`{3}<\/p>/m do
lang = $1
str = $2.gsub(/^\s{4}/, '').gsub('<','<').gsub('>','>')
highlight(str, lang)
end
end
|
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# Replaces relative urls with full urls |
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def expand_urls(input, url='')
url ||= '/' |
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input.gsub /(\s+(href|src)\s*=\s*["|']{1})(\/[^\"'>]+)/ do
$1+url+$3
end
end |
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|
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# Removes trailing forward slash from a string for easily appending url segments
def strip_slash(input)
if input =~ /(.+)\/$|^\/$/
input = $1
end
input
end
# Returns a url without the protocol (http://)
def shorthand_url(input) |
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input.gsub /(https?:\/\/)(\S+)/ do |
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$2
end
end |
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# replaces primes with smartquotes using RubyPants |
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def smart_quotes(input)
require 'rubypants'
RubyPants.new(input).to_html
end |
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# Returns a title cased string based on John Gruber's title case http://daringfireball.net/2008/08/title_case_update |
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def titlecase(input)
input.titlecase
end |
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# Returns a datetime if the input is a string |
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def datetime(date) |
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if date.class == String
date = Time.parse(date)
end |
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date
end |
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# Returns an ordidinal date eg July 22 2007 -> July 22nd 2007 |
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def ordinalize(date)
date = datetime(date) |
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"#{date.strftime('%b')} #{ordinal(date.strftime('%e').to_i)}, #{date.strftime('%Y')}" |
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end |
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# Returns an ordinal number. 13 -> 13th, 21 -> 21st etc. |
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def ordinal(number)
if (11..13).include?(number.to_i % 100)
"#{number}<span>th</span>"
else
case number.to_i % 10
when 1; "#{number}<span>st</span>" |
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when 2; "#{number}<span>nd</span>" |
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when 3; "#{number}<span>rd</span>"
else "#{number}<span>th</span>"
end
end
end
end
Liquid::Template.register_filter OctopressFilters |