Class: Jekyll::VibrantJS::VibrantJSTag

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/jekyll-vibrantjs/jekyll-vibrantjs-tag.rb

Instance Method Summary collapse

Constructor Details

#initialize(tagName, image_arg, tokens) ⇒ VibrantJSTag

Returns a new instance of VibrantJSTag.



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# File 'lib/jekyll-vibrantjs/jekyll-vibrantjs-tag.rb', line 5

def initialize(tagName, image_arg, tokens)
  super
  @image_arg = image_arg
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/jekyll-vibrantjs/jekyll-vibrantjs-tag.rb', line 10

def render(context)
  # if we pass in something like "post.image.feature" instead of a path,
  # the variable name gets passed in as a string, so we can look it up in the context
  image_path = "#{context[@image_arg.strip]}"

  if File.exist?(image_path)
    script_path = File.expand_path('./call-vibrant.js', File.dirname(__FILE__))
    node_modules_path = File.join Dir.pwd, "node_modules"

    stdout, status = Open3.capture2({"NODE_PATH" => node_modules_path}, 'node', script_path, image_path)
    
    raise "Failed to call vibrantjs" unless status.success?
  else
    raise "Given image file `#{image_path}` doesn't exist"
  end

  @palette = eval(stdout)
  
  tmpl_path = File.join Dir.pwd, "_includes", "vibrantjs-css.html"
  unless File.exist?(tmpl_path)
    tmpl_path = File.expand_path('./vibrantjs-css.html', File.dirname(__FILE__))
  end

  tmpl = File.read tmpl_path
  site = context.registers[:site]
  tmpl = (Liquid::Template.parse tmpl).render site.site_payload.merge!({
    "rgbVibrant" => @palette["Vibrant"],
    "rgbLightVibrant" => @palette["LightVibrant"],
    "rgbDarkVibrant" => @palette["DarkVibrant"],
    "rgbMuted" => @palette["Muted"],
    "rgbLightMuted" => @palette["LightMuted"],
    "rgbDarkMuted" => @palette["DarkMuted"]
  })
end