51 lines
2.0 KiB
Ruby
51 lines
2.0 KiB
Ruby
# Title: Simple Image tag for Jekyll
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# Authors: Brandon Mathis http://brandonmathis.com
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# Felix Schäfer, Frederic Hemberger
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# Description: Easily output images with optional class names, width, height, title and alt attributes
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#
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# Syntax {% img [class name(s)] [http[s]:/]/path/to/image [width [height]] [title text | "title text" ["alt text"]] %}
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#
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# Examples:
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# {% img /images/ninja.png Ninja Attack! %}
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# {% img left half http://site.com/images/ninja.png Ninja Attack! %}
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# {% img left half http://site.com/images/ninja.png 150 150 "Ninja Attack!" "Ninja in attack posture" %}
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#
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# Output:
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# <img src="/images/ninja.png">
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# <img class="left half" src="http://site.com/images/ninja.png" title="Ninja Attack!" alt="Ninja Attack!">
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# <img class="left half" src="http://site.com/images/ninja.png" width="150" height="150" title="Ninja Attack!" alt="Ninja in attack posture">
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#
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module Jekyll
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class ImageTag < Liquid::Tag
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@img = nil
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def initialize(tag_name, markup, tokens)
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attributes = ['class', 'src', 'width', 'height', 'title']
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if markup =~ /(?<class>\S.*\s+)?(?<src>(?:https?:\/\/|\/|\S+\/)\S+)(?:\s+(?<width>\d+))?(?:\s+(?<height>\d+))?(?<title>\s+.+)?/i
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@img = attributes.reduce({}) { |img, attr| img[attr] = $~[attr].strip if $~[attr]; img }
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if /(?:"|')(?<title>[^"']+)?(?:"|')\s+(?:"|')(?<alt>[^"']+)?(?:"|')/ =~ @img['title']
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@img['title'] = title
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@img['alt'] = alt
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else
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@img['alt'] = @img['title'].gsub!(/"/, '"') if @img['title']
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end
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@img['class'].gsub!(/"/, '') if @img['class']
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end
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super
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end
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def render(context)
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if @img
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"<img #{@img.collect {|k,v| "#{k}=\"#{v}\"" if v}.join(" ")}>"
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else
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"Error processing input, expected syntax: {% img [class name(s)] [http[s]:/]/path/to/image [width [height]] [title text | \"title text\" [\"alt text\"]] %}"
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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_tag('img', Jekyll::ImageTag)
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