# File lib/feed_tools/vendor/html5/lib/html5/filters/inject_meta_charset.rb, line 6
6:       def initialize(source, encoding)
7:         super(source)
8:         @encoding = encoding
9:       end

    # File lib/feed_tools/vendor/html5/lib/html5/filters/inject_meta_charset.rb, line 11
11:       def each
12:         state = :pre_head
13:         meta_found = @encoding.nil?
14:         pending = []
15: 
16:         __getobj__.each do |token|
17:           case token[:type]
18:           when :StartTag
19:             state = :in_head if token[:name].downcase == "head"
20: 
21:           when :EmptyTag
22:             if token[:name].downcase == "meta"
23:               # replace charset with actual encoding
24:               token[:data].each_with_index do |(name, value), index|
25:                 if name == 'charset'
26:                   token[:data][index][1] = @encoding
27:                   meta_found = true
28:                 end
29:               end
30: 
31:               # replace charset with actual encoding
32:               has_http_equiv_content_type = false
33:               content_index = -1
34:               token[:data].each_with_index do |(name, value), i|
35:                 if name.downcase == 'charset'
36:                   token[:data][i] = ['charset', @encoding]
37:                   meta_found = true
38:                   break
39:                 elsif name == 'http-equiv' and value.downcase == 'content-type'
40:                   has_http_equiv_content_type = true
41:                 elsif name == 'content'
42:                   content_index = i
43:                 end
44:               end
45: 
46:               if !meta_found
47:                 if has_http_equiv_content_type && content_index >= 0
48:                   token[:data][content_index][1] = 'text/html; charset=%s' % @encoding
49:                   meta_found = true
50:                 end
51:               end
52: 
53:             elsif token[:name].downcase == "head" && !meta_found
54:               # insert meta into empty head
55:               yield :type => :StartTag, :name => "head", :data => token[:data]
56:               yield :type => :EmptyTag, :name => "meta", :data => [["charset", @encoding]]
57:               yield :type => :EndTag,   :name => "head"
58:               meta_found = true
59:               next
60:             end
61: 
62:           when :EndTag
63:             if token[:name].downcase == "head" && pending.any?
64:               # insert meta into head (if necessary) and flush pending queue
65:               yield pending.shift
66:               yield :type => :EmptyTag, :name => "meta", :data => [["charset", @encoding]] if !meta_found
67:               yield pending.shift while pending.any?
68:               meta_found = true
69:               state = :post_head
70:             end
71:           end
72: 
73:           if state == :in_head
74:             pending << token
75:           else
76:             yield token
77:           end
78:         end
79:       end