119 lines
2.9 KiB
Ruby
119 lines
2.9 KiB
Ruby
#custom filters for Octopress
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require './plugins/backtick_code_block'
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require './plugins/post_filters'
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require './plugins/raw'
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require './plugins/date'
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require 'rubypants'
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module OctopressFilters
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include BacktickCodeBlock
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include TemplateWrapper
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def pre_filter(input, ext)
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input = render_code_block(input, ext)
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end
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end
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module Jekyll
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class ContentFilters < PostFilter
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include OctopressFilters
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def pre_render(post)
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if post.ext.match('html|textile|markdown|md|haml|slim|xml')
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post.content = pre_filter(post.content, post.ext)
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end
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end
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end
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end
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module OctopressLiquidFilters
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include Octopress::Date
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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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# Escapes CDATA sections in post content
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def cdata_escape(input)
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input.gsub(/<!\[CDATA\[/, '<![CDATA[').gsub(/\]\]>/, ']]>')
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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+$3
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end
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end
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# Prepend a local url with a file path
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# remote urls and urls beginning with ! will be ignored
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def prepend_url(input, path='')
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path += '/' unless path.match /\/$/
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if input.match /^!/
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input.gsub(/^(!)(.+)/, '\2')
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else
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input.gsub(/^(\/)?([^:]+?)$/, "#{path}"+'\2')
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end
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end
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# Improved version of Liquid's truncate:
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# - Doesn't cut in the middle of a word.
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# - Uses typographically correct ellipsis (…) insted of '...'
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def truncate(input, length)
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if input.length > length && input[0..(length-1)] =~ /(.+)\b.+$/im
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$1.strip + ' …'
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else
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input
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end
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end
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# Improved version of Liquid's truncatewords:
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# - Uses typographically correct ellipsis (…) insted of '...'
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def truncatewords(input, length)
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truncate = input.split(' ')
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if truncate.length > length
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truncate[0..length-1].join(' ').strip + ' …'
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else
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input
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end
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end
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# Removes trailing forward slash from a string for easily appending url segments
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def strip_slash(input)
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input.sub(/\/\s*$/, '')
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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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# 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 unless input.nil?
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end
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end
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Liquid::Template.register_filter OctopressLiquidFilters
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