Class: Gretel::Renderer::LinkCollection

Inherits:
Array
  • Object
show all
Defined in:
lib/gretel/renderer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context, links, options = {}) ⇒ LinkCollection

Returns a new instance of LinkCollection.



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# File 'lib/gretel/renderer.rb', line 158

def initialize(context, links, options = {})
  @context, @links, @options = context, links, options
  concat links
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

Proxy to view context.



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# File 'lib/gretel/renderer.rb', line 249

def method_missing(method, *args, &block)
  context.send(method, *args, &block)
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/gretel/renderer.rb', line 156

def context
  @context
end

#links ⇒ Object (readonly)

Returns the value of attribute links.



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# File 'lib/gretel/renderer.rb', line 156

def links
  @links
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/gretel/renderer.rb', line 156

def options
  @options
end

Instance Method Details

Proxy for context.link_to that can be overridden by plugins.



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# File 'lib/gretel/renderer.rb', line 244

def breadcrumb_link_to(name, url, options = {})
  context.link_to(name, url, options)
end

#keys ⇒ Object

Helper for returning all link keys to allow for simple testing.



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# File 'lib/gretel/renderer.rb', line 164

def keys
  map(&:key)
end

#render ⇒ Object Also known as: to_s

Renders the links into breadcrumbs.



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# File 'lib/gretel/renderer.rb', line 169

def render
  return "" if links.empty?

  # Loop through all but the last (current) link and build HTML of the fragments
  fragments = links[0..-2].map do |link|
    render_fragment(options[:fragment_tag], link.text, link.url, options[:semantic])
  end

  # The current link is handled a little differently, and is only linked if specified in the options
  current_link = links.last
  fragments << render_fragment(options[:fragment_tag], current_link.text, (options[:link_current] ? current_link.url : nil), options[:semantic], class: options[:current_class], current_link: current_link.url)

  # Build the final HTML
  html_fragments = []

  if options[:pretext].present?
    html_fragments << content_tag(:span, options[:pretext], class: options[:pretext_class])
  end

  html_fragments << fragments.join(options[:separator])

  if options[:posttext].present?
    html_fragments << content_tag(:span, options[:posttext], class: options[:posttext_class])
  end

  html = html_fragments.join(" ").html_safe
  content_tag(options[:container_tag], html, id: options[:id], class: options[:class])
end

#render_fragment(fragment_tag, text, url, semantic, options = {}) ⇒ Object

Renders HTML for a breadcrumb fragment, i.e. a breadcrumb link.



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# File 'lib/gretel/renderer.rb', line 201

def render_fragment(fragment_tag, text, url, semantic, options = {})
  if semantic
    render_semantic_fragment(fragment_tag, text, url, options)
  else
    render_nonsemantic_fragment(fragment_tag, text, url, options)
  end
end

#render_nonsemantic_fragment(fragment_tag, text, url, options = {}) ⇒ Object

Renders regular, non-semantic fragment HTML.



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# File 'lib/gretel/renderer.rb', line 230

def render_nonsemantic_fragment(fragment_tag, text, url, options = {})
  if fragment_tag
    text = breadcrumb_link_to(text, url) if url.present?
    content_tag(fragment_tag, text, class: options[:class])
  elsif url.present?
    breadcrumb_link_to(text, url, class: options[:class])
  elsif options[:class].present?
    content_tag(:span, text, class: options[:class])
  else
    text
  end
end

#render_semantic_fragment(fragment_tag, text, url, options = {}) ⇒ Object

Renders semantic fragment HTML.



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# File 'lib/gretel/renderer.rb', line 210

def render_semantic_fragment(fragment_tag, text, url, options = {})
  if fragment_tag
    text = content_tag(:span, text, itemprop: "title")

    if url.present?
      text = breadcrumb_link_to(text, url, itemprop: "url")
    elsif options[:current_link].present?
      current_url = "#{root_url}#{options[:current_link].gsub(/^\//, '')}"
      text = text + tag(:meta, itemprop: "url", content: current_url)
    end

    content_tag(fragment_tag, text, class: options[:class], itemscope: "", itemtype: "http://data-vocabulary.org/Breadcrumb")
  elsif url.present?
    content_tag(:span, breadcrumb_link_to(content_tag(:span, text, itemprop: "title"), url, class: options[:class], itemprop: "url"), itemscope: "", itemtype: "http://data-vocabulary.org/Breadcrumb")
  else
    content_tag(:span, content_tag(:span, text, class: options[:class], itemprop: "title"), itemscope: "", itemtype: "http://data-vocabulary.org/Breadcrumb")
  end
end