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Makes img tag more flexible, adds support for relative paths. Includes pull request #145, fixes #161

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Frederic Hemberger 2011-09-26 11:00:35 +02:00
parent 8c5ce51b3f
commit 50eaf98c24
1 changed files with 23 additions and 22 deletions
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45
plugins/image_tag.rb
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@ -1,46 +1,47 @@
# Title: Simple Image tag for Jekyll # Title: Simple Image tag for Jekyll
# Author: Brandon Mathis http://brandonmathis.com # Authors: Brandon Mathis http://brandonmathis.com
# Description: Easily output images with optional class names and title/alt attributes # Felix Schäfer, Frederic Hemberger
# Description: Easily output images with optional class names, width, height, title and alt attributes
# #
# Syntax {% image [class name(s)] url [title text] %} # Syntax {% img [class name(s)] [http[s]:/]/path/to/image [width [height]] [title text | "title text" ["alt text"]] %}
# #
# Example: # Examples:
# {% ima left half http://site.com/images/ninja.png Ninja Attack! %} # {% img /images/ninja.png Ninja Attack! %}
# {% img left half http://site.com/images/ninja.png Ninja Attack! %}
# {% img left half http://site.com/images/ninja.png 150 150 "Ninja Attack!" "Ninja in attack posture" %}
# #
# Output: # Output:
# <image class='left' src="http://site.com/images/ninja.png" title="Ninja Attack!" alt="Ninja Attack!"> # <img src="/images/ninja.png">
# <img class="left half" src="http://site.com/images/ninja.png" title="Ninja Attack!" alt="Ninja Attack!">
# <img class="left half" src="http://site.com/images/ninja.png" width="150" height="150" title="Ninja Attack!" alt="Ninja in attack posture">
# #
module Jekyll module Jekyll
class ImageTag < Liquid::Tag class ImageTag < Liquid::Tag
@img = nil @img = nil
@title = nil
@class = ''
@width = ''
@height = ''
def initialize(tag_name, markup, tokens) def initialize(tag_name, markup, tokens)
if markup =~ /(\S.*\s+)?(https?:\/\/|\/)(\S+)(\s+\d+\s+\d+)?(\s+.+)?/i attributes = ['class', 'src', 'width', 'height', 'title']
@class = $1 || ''
@img = $2 + $3 if markup =~ /(?<class>\S.*\s+)?(?<src>(?:https?:\/\/|\/|\S+\/)\S+)(?:\s+(?<width>\d+))?(?:\s+(?<height>\d+))?(?<title>\s+.+)?/i
if $5 @img = attributes.reduce({}) { |img, attr| img[attr] = $~[attr].strip if $~[attr]; img }
@title = $5.strip if @img['title'] =~ /(?:"|')([^"']+)?(?:"|')\s+(?:"|')([^"']+)?(?:"|')/
end @img['title'] = $1
if $4 =~ /\s*(\d+)\s+(\d+)/ @img['alt'] = $2
@width = $1 else
@height = $2 @img['alt'] = @img['title'].gsub!(/"/, '')
end end
@img['class'].gsub!(/"/, '')
end end
super super
end end
def render(context) def render(context)
output = super
if @img if @img
"<img class='#{@class}' src='#{@img}' width='#{@width}' height='#{@height}' alt='#{@title}' title='#{@title}'>" "<img #{@img.collect {|k,v| "#{k}=\"#{v}\"" if v}.join(" ")}>"
else else
"Error processing input, expected syntax: {% img [class name(s)] /url/to/image [width height] [title text] %}" "Error processing input, expected syntax: {% img [class name(s)] [http[s]:/]/path/to/image [width [height]] [title text | \"title text\" [\"alt text\"]] %}"
end end
end end
end end