132 lines
3.5 KiB
Ruby
132 lines
3.5 KiB
Ruby
#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)
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input.split(/<!--\s*more\s*-->/i)[0]
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else
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input
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end
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end
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# Checks for excerpts (helpful for template conditionals)
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def has_excerpt(input)
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input =~ /<!--\s*more\s*-->/i ? true : false
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end
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# Summary is used on the Archive pages to return the first block of content from a post.
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def summary(input)
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if input.index(/\n\n/)
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input.split(/\n\n/)[0]
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else
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input
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end
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end
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# for Github style codeblocks eg.
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# ``` ruby
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# code snippet
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# ```
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def backtick_codeblock(input)
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code = nil
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# Markdown support
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input = input.gsub /<p>`{3}\s*(\w+)?<\/p>\s*<pre><code>\s*(.+?)\s*<\/code><\/pre>\s*<p>`{3}<\/p>/m do
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lang = $1
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if lang != ''
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str = $2.gsub('<','<').gsub('>','>').gsub('&','&')
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code = highlight(str, lang)
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"<figure role=code>#{code}</figure>"
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else
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code = tableize_code($2)
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"<figure role=code>#{code}</figure>"
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end
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end
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# Textile warning
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input = input.gsub /<p>`{3}\s*(\w+)?<br\s*\/>\n(.+?)`{3}<\/p>/m do
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lang = $1
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"<pre><code>Back tick code blocks are not supported for Textile.\nTry HTML or Markdown instead or use the codeblock tag.\n\n{% codeblock #{lang} %}\nYour code snippet\n{% endcodeblock %}</code></pre>"
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end
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# Regular HTML support
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input.gsub /^`{3}\s*(\w+)?\n(.+?)\n`{3}/m do
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lang = $1
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str = $2.gsub(/^\s{4}/, '')
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if lang != ''
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code = highlight(str, lang)
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"<figure role=code>#{code}</figure>"
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else
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code = tableize_code($2.gsub('<','<').gsub('>','>'))
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"<figure role=code>#{code}</figure>"
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end
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end
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end
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# Replaces relative urls with full urls
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def expand_urls(input, url='')
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url ||= '/'
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input.gsub /(\s+(href|src)\s*=\s*["|']{1})(\/[^\"'>]*)/ do
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$1+url+$3
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end
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end
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# Removes trailing forward slash from a string for easily appending url segments
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def strip_slash(input)
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if input =~ /(.+)\/$|^\/$/
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input = $1
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end
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input
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end
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# Returns a url without the protocol (http://)
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def shorthand_url(input)
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input.gsub /(https?:\/\/)(\S+)/ do
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$2
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end
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end
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# replaces primes with smartquotes using RubyPants
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def smart_quotes(input)
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require 'rubypants'
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RubyPants.new(input).to_html
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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)
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input.titlecase
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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
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date = Time.parse(date)
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end
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date
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end
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# Returns an ordidinal date eg July 22 2007 -> July 22nd 2007
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def ordinalize(date)
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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)
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if (11..13).include?(number.to_i % 100)
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"#{number}<span>th</span>"
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else
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case number.to_i % 10
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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>"
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else "#{number}<span>th</span>"
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end
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end
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end
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end
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Liquid::Template.register_filter OctopressFilters
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