blog/plugins/image_tag.rb

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# Title: Simple Image tag for Jekyll
# Author: Brandon Mathis http://brandonmathis.com
# Description: Easily output images with optional class names and title/alt attributes
#
# Syntax {% image [class name(s)] url [title text] %}
#
# Example:
# {% ima left half http://site.com/images/ninja.png Ninja Attack! %}
#
# Output:
# <image class='left' src="http://site.com/images/ninja.png" title="Ninja Attack!" alt="Ninja Attack!">
#
module Jekyll
class ImageTag < Liquid::Tag
@img = nil
@title = nil
@class = ''
def initialize(tag_name, markup, tokens)
if markup =~ /(\S.*\s+)?(https?:\/\/|\/)(\S+)(\s+.+)?/i
@class = $1
@img = $2 + $3
@title = $4
end
super
end
def render(context)
output = super
if @img
"<img class='#{@class}' src='#{@img}' alt='#{@title}' title='#{@title}'>"
else
"Error processing input, expected syntax: {% img [class name(s)] /url/to/image [title text] %}"
end
end
end
end
Liquid::Template.register_tag('img', Jekyll::ImageTag)