Module: DashFu::Bee::Utils

Included in:
DashFu::Bee
Defined in:
lib/dash-fu/bee/utils.rb

Overview

Utility functions. Also accessible as instance methods in Bee.

Class Method Summary collapse

Class Method Details

.escape_html(text) ⇒ Object Also known as: h

Shortcut for Rack::Utils.escape_html



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# File 'lib/dash-fu/bee/utils.rb', line 7

def escape_html(text)
  Rack::Utils.escape_html(text.to_s)
end

.truncate(text, length = 250, continue = "...") ⇒ Object

Truncates text value.



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# File 'lib/dash-fu/bee/utils.rb', line 13

def truncate(text, length = 250, continue = "...")
  return text unless text.length > length
  trim = length - continue.length
  text[0,trim] + continue
end

.truncate_html(html, limit = 250, ellipsis = "...") ⇒ Object

Truncates HTML without unbalanced elements/entities.



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# File 'lib/dash-fu/bee/utils.rb', line 20

def truncate_html(html, limit = 250, ellipsis = "...")
  # Inspiration: http://pastie.textmate.org/145402
  ellipsis_length = Nokogiri::HTML.fragment(ellipsis).text.length
  truncate = lambda do |node, avail|
    node.children.each do |child|
      if avail <= 0
        child.remove
      elsif child.text?
        source = child.parent.name == "pre" ? child.content : child.content.squeeze(" ")
        child.content = source[/^(.{0,#{avail}})(\s.*)?$/, 1]
        avail -= source.length
      elsif child.element? && !%w{script style}.include?(child.name)
        avail = truncate[child, avail]
      else
        child.remove
      end
    end
    avail
  end
  nodes = Nokogiri::HTML.fragment(html)
  left = truncate[nodes, limit - ellipsis_length]
  left < 0 ? nodes.to_html + ellipsis : nodes.to_html
end