Class: REXML::Parsers::SAX2ParserWithDoctypeFix

Inherits:
Object
  • Object
show all
Defined in:
lib/rexml/parsers/sax2parser_with_doctype_fix.rb

Overview

SAX2Parser

Instance Method Summary collapse

Constructor Details

#initialize(source) ⇒ SAX2ParserWithDoctypeFix

Returns a new instance of SAX2ParserWithDoctypeFix.



19
20
21
22
23
24
25
26
27
 
# File 'lib/rexml/parsers/sax2parser_with_doctype_fix.rb', line 19

def initialize source
        @parser = BaseParserWithDoctypeFix.new(source)
        @listeners = []
        @procs = []
        @namespace_stack = []
        @has_listeners = false
        @tag_stack = []
        @entities = {}
end

Instance Method Details

#add_listener(listener) ⇒ Object 



29
30
31
 
# File 'lib/rexml/parsers/sax2parser_with_doctype_fix.rb', line 29

def add_listener( listener )
  @parser.add_listener( listener )
end

#deafen(listener = nil, &blok) ⇒ Object 



81
82
83
84
85
86
87
88
 
# File 'lib/rexml/parsers/sax2parser_with_doctype_fix.rb', line 81

def deafen( listener=nil, &blok )
        if listener
                @listeners.delete_if {|item| item[-1] == listener }
                @has_listeners = false if @listeners.size == 0
        else
                @procs.delete_if {|item| item[-1] == blok }
        end
end

#listen(*args, &blok) ⇒ Object

Array contains regular expressions or strings which will be matched against fully qualified element names.

Listener must implement the methods in SAX2Listener

Block will be passed the same arguments as a SAX2Listener method would be, where the method name is the same as the matched Symbol. See the SAX2Listener for more information.



63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/rexml/parsers/sax2parser_with_doctype_fix.rb', line 63

def listen( *args, &blok )
        if args[0].kind_of? Symbol
                if args.size == 2
                        args[1].each { |match| @procs << [args[0], match, blok] }
                else
                        add( [args[0], nil, blok] )
                end
        elsif args[0].kind_of? Array
                if args.size == 2
                        args[0].each { |match| add( [nil, match, args[1]] ) }
                else
                        args[0].each { |match| add( [ :start_element, match, blok ] ) }
                end
        else
                add([nil, nil, args[0]])
        end
end

#parse ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
 
# File 'lib/rexml/parsers/sax2parser_with_doctype_fix.rb', line 90

def parse
        @procs.each { |sym,match,block| block.call if sym == :start_document }
        @listeners.each { |sym,match,block|
                block.start_document if sym == :start_document or sym.nil?
        }
        root = context = []
        while true
                event = @parser.pull
                case event[0]
                when :end_document
                        handle( :end_document )
                        break
                when :start_doctype
                        handle( :doctype, *event[1..-1])
                when :end_doctype
                        context = context[1]
                when :start_element
                        @tag_stack.push(event[1])
                        # find the observers for namespaces
                        procs = get_procs( :start_prefix_mapping, event[1] )
                        listeners = get_listeners( :start_prefix_mapping, event[1] )
                        if procs or listeners
                                # break out the namespace declarations
                                # The attributes live in event[2]
                                event[2].each {|n, v| event[2][n] = @parser.normalize(v)}
                                nsdecl = event[2].find_all { |n, value| n =~ /^xmlns(:|$)/ }
                                nsdecl.collect! { |n, value| [ n[6..-1], value ] }
                                @namespace_stack.push({})
                                nsdecl.each do |n,v|
                                        @namespace_stack[-1][n] = v
                                        # notify observers of namespaces
                                        procs.each { |ob| ob.call( n, v ) } if procs
                                        listeners.each { |ob| ob.start_prefix_mapping(n, v) } if listeners
                                end
                        end
                        event[1] =~ Namespace::NAMESPLIT
                        prefix = $1
                        local = $2
                        uri = get_namespace(prefix)
                        # find the observers for start_element
                        procs = get_procs( :start_element, event[1] )
                        listeners = get_listeners( :start_element, event[1] )
                        # notify observers
                        procs.each { |ob| ob.call( uri, local, event[1], event[2] ) } if procs
                        listeners.each { |ob|
                                ob.start_element( uri, local, event[1], event[2] )
                        } if listeners
                when :end_element
                        @tag_stack.pop
                        event[1] =~ Namespace::NAMESPLIT
                        prefix = $1
                        local = $2
                        uri = get_namespace(prefix)
                        # find the observers for start_element
                        procs = get_procs( :end_element, event[1] )
                        listeners = get_listeners( :end_element, event[1] )
                        # notify observers
                        procs.each { |ob| ob.call( uri, local, event[1] ) } if procs
                        listeners.each { |ob|
                                ob.end_element( uri, local, event[1] )
                        } if listeners

                        namespace_mapping = @namespace_stack.pop
                        # find the observers for namespaces
                        procs = get_procs( :end_prefix_mapping, event[1] )
                        listeners = get_listeners( :end_prefix_mapping, event[1] )
                        if procs or listeners
                                namespace_mapping.each do |prefix, uri|
                                        # notify observers of namespaces
                                        procs.each { |ob| ob.call( prefix ) } if procs
                                        listeners.each { |ob| ob.end_prefix_mapping(prefix) } if listeners
                                end
                        end
                when :text
            #normalized = @parser.normalize( event[1] )
            #handle( :characters, normalized )
            copy = event[1].clone
            @entities.each { |key, value| copy = copy.gsub("&#{key};", value) }
            copy.gsub!( Text::NUMERICENTITY ) {|m|
              m=$1
              m = "0#{m}" if m[0] == ?x
              [Integer(m)].pack('U*')
            }
            handle( :characters, copy )
          when :entitydecl
            @entities[ event[1] ] = event[2] if event.size == 3
                        handle( *event )
                when :processing_instruction, :comment, :attlistdecl,
                        :elementdecl, :cdata, :notationdecl, :xmldecl
                        handle( *event )
                end
          handle( :progress, @parser.position )
        end
end