Class: Detergent::Matchers::RemovableNodeMatcher

Inherits:
Object
  • Object
show all
Defined in:
lib/detergent/matchers/removable_node_matcher.rb

Instance Method Summary collapse

Instance Method Details

#match?(node) ⇒ Boolean

Returns:

  • (Boolean) 


5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/detergent/matchers/removable_node_matcher.rb', line 5

def match?(node)
  # Remove button elements with Share or Save aria-labels
  if node.name.downcase == "button"
    aria_label = node['aria-label'].to_s.downcase
    return true if ["share", "save"].include?(aria_label)
  end

  # Remove nav with role=navigation
  if node.name.downcase == "nav"
    return true if node['role'].to_s.downcase == "navigation"
  end

  # Elements we don't care about
  return true if %w(link iframe script style footer nav form select textarea).include?(node.name.downcase)

  # Get rid of elements with classnames that look suspect
  class_list = node['class'].to_s.downcase.split(" ")
  return true if class_list.any?{ %w(comments-show comments actionbar related-stories navigation nodisplay sidebar admz hidden header footer social share).include?(_1) }

  id_list = node['id'].to_s.downcase.split(" ")
  return true if id_list.any?{ %w(header navigation ad admz sidebar related-stories hidden).include?(_1) }

  # Get rid of elements with inline styles that look suspect
  style_list = node['style'].to_s.downcase.split(";")
  return true if style_list.any?{ ["display: none", "display:none"].include?(_1) }

  # Don't remove images, etc in this step, which never have text content:
  return false if %w(img picture figure).include?(node.name.downcase)

  # Don't remove if any descendants are imgs, etc:
  return false if node.xpath(".//img | .//picture | .//figure").any?

  # Using XPath to find any descendant text node that contains non-whitespace characters.
  node.xpath(".//text()[normalize-space()]").empty?
end