Class: Rexle::Element
Defined Under Namespace
Instance Attribute Summary collapse
-
#child_elements ⇒ Object
readonly
Returns the value of attribute child_elements.
-
#doc_id ⇒ Object
readonly
Returns the value of attribute doc_id.
-
#instructions ⇒ Object
readonly
Returns the value of attribute instructions.
-
#name ⇒ Object
Returns the value of attribute name.
-
#parent ⇒ Object
Returns the value of attribute parent.
-
#value ⇒ Object
Returns the value of attribute value.
Instance Method Summary collapse
- #add(item) ⇒ Object
- #add_attribute(*x) ⇒ Object
- #add_element(item) ⇒ Object
- #add_text(s) ⇒ Object
- #at_css(selector) ⇒ Object
- #attribute(key) ⇒ Object
- #attributes ⇒ Object
- #backtrack(use_attributes: true) ⇒ Object
- #cdata? ⇒ Boolean
- #cdatas ⇒ Object
- #children ⇒ Object
- #children=(a) ⇒ Object
- #clone ⇒ Object
- #contains(raw_args) ⇒ Object
- #content(options = {}) ⇒ Object
- #count(path) ⇒ Object
- #css(selector) ⇒ Object
- #current ⇒ Object
- #deep_clone ⇒ Object
- #delete(obj = nil) ⇒ Object (also: #remove)
- #doc_root ⇒ Object
- #each(&blk) ⇒ Object
- #each_recursive(&blk) ⇒ Object (also: #traverse)
- #element(s) ⇒ Object
- #elements(s = nil) ⇒ Object
- #filter_xpath(raw_path, rlist = [], &blk) ⇒ Object
- #has_elements? ⇒ Boolean
-
#initialize(name = nil, value: nil, attributes: Attributes.new, rexle: self) ⇒ Element
constructor
A new instance of Element.
- #insert_after(node) ⇒ Object
- #insert_before(node) ⇒ Object
- #inspect ⇒ Object
- #last(a) ⇒ Object
-
#lowercase(s) ⇒ Object
not yet implemented.
- #map(&blk) ⇒ Object
- #max(path) ⇒ Object
- #next_element ⇒ Object (also: #next_sibling)
- #not(bool) ⇒ Object
- #original_clone ⇒ Object
- #plaintext ⇒ Object
- #prepend(item) ⇒ Object
- #previous_element ⇒ Object (also: #previous_sibling)
- #query_xpath(raw_xpath_value, rlist = [], &blk) ⇒ Object
- #root ⇒ Object
- #text(s = '') ⇒ Object
- #texts ⇒ Object
- #to_a ⇒ Object
- #xml(options = {}) ⇒ Object (also: #to_s)
- #xpath(path, rlist = [], &blk) ⇒ Object
Methods included from XMLhelper
#doc_pretty_print, #doc_print, #pretty_print, #processing_instructions, #scan_print, #scan_to_a
Constructor Details
#initialize(name = nil, value: nil, attributes: Attributes.new, rexle: self) ⇒ Element
Returns a new instance of Element.
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# File 'lib/rexle.rb', line 314 def initialize(name=nil, value: nil, attributes: Attributes.new, rexle: self) @rexle = rexle super() @name, @attributes = name.to_s, attributes raise "Element name must not be blank" unless name @child_elements = [] self.add_text value if value end |
Instance Attribute Details
#child_elements ⇒ Object (readonly)
Returns the value of attribute child_elements.
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# File 'lib/rexle.rb', line 310 def child_elements @child_elements end |
#doc_id ⇒ Object (readonly)
Returns the value of attribute doc_id.
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# File 'lib/rexle.rb', line 310 def doc_id @doc_id end |
#instructions ⇒ Object (readonly)
Returns the value of attribute instructions.
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# File 'lib/rexle.rb', line 310 def instructions @instructions end |
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/rexle.rb', line 309 def name @name end |
#parent ⇒ Object
Returns the value of attribute parent.
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# File 'lib/rexle.rb', line 309 def parent @parent end |
#value ⇒ Object
Returns the value of attribute value.
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# File 'lib/rexle.rb', line 309 def value @value end |
Instance Method Details
#add(item) ⇒ Object
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# File 'lib/rexle.rb', line 871 def add(item) if item.is_a? Rexle::Element then if self.doc_id == item.doc_id then new_item = item.deep_clone add_element new_item item.delete item = nil item = new_item new_item else add_element item end else add_element item end end |
#add_attribute(*x) ⇒ Object
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# File 'lib/rexle.rb', line 900 def add_attribute(*x) proc_hash = lambda {|x| Hash[*x]} procs = { Hash: lambda {|x| x[0] || {}}, String: proc_hash, Symbol: proc_hash, :'Attributes::Value' => proc_hash } type = x[0].class.to_s.to_sym h = procs[type].call(x) @attributes.merge! h end |
#add_element(item) ⇒ Object
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# File 'lib/rexle.rb', line 849 def add_element(item) if item.is_a? String then @child_elements << Value.new(item) elsif item.is_a? Rexle::CData then @child_elements << item elsif item.is_a? Rexle::Comment then @child_elements << item elsif item.is_a? Rexle::Element then @child_elements << item # add a reference from this element (the parent) to the child item.parent = self item elsif item.is_a? Rexle then self.add_element(item.root) end end |
#add_text(s) ⇒ Object
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# File 'lib/rexle.rb', line 918 def add_text(s) self.child_elements << s self end |
#at_css(selector) ⇒ Object
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# File 'lib/rexle.rb', line 359 def at_css(selector) self.root.element RexleCSS.new(selector).to_xpath end |
#attribute(key) ⇒ Object
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# File 'lib/rexle.rb', line 924 def attribute(key) key = key.to_sym if key.is_a? String if @attributes[key].is_a? String then @attributes[key].gsub('<','<').gsub('>','>') else @attributes[key] end end |
#attributes ⇒ Object
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# File 'lib/rexle.rb', line 935 def attributes() @attributes end |
#backtrack(use_attributes: true) ⇒ Object
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# File 'lib/rexle.rb', line 327 def backtrack(use_attributes: true) BacktrackXPath.new(self, use_attributes: use_attributes) end |
#cdatas ⇒ Object
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# File 'lib/rexle.rb', line 937 def cdatas() self.children.inject([]){|r,x| x.is_a?(Rexle::CData) ? r << x.to_s : r } end |
#children ⇒ Object
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# File 'lib/rexle.rb', line 941 def children() r = @child_elements def r.is_an_empty_string?() self.length == 1 and self.first == '' end return r end |
#children=(a) ⇒ Object
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# File 'lib/rexle.rb', line 952 def children=(a) @child_elements = a if a.is_a? Array end |
#clone ⇒ Object
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# File 'lib/rexle.rb', line 956 def clone() Element.new(@name, attributes: Marshal.load( Marshal.dump(@attributes))) end |
#contains(raw_args) ⇒ Object
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# File 'lib/rexle.rb', line 335 def contains(raw_args) path, raw_val = raw_args.split(',',2) val = raw_val.strip[/^["']?.*["']?$/] anode = query_xpath(path) return [false] if anode.nil? or anode.empty? a = scan_contents(anode.first) r = [a.grep(/#{val.sub(/^["'](.*)["']$/,'\1')}/).length > 0] r.any? end |
#content(options = {}) ⇒ Object
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# File 'lib/rexle.rb', line 1090 def content(={}) CGI.unescapeHTML(xml()) end |
#count(path) ⇒ Object
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# File 'lib/rexle.rb', line 350 def count(path) length = query_xpath(path).flatten.compact.length length end |
#css(selector) ⇒ Object
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# File 'lib/rexle.rb', line 363 def css(selector) selector.split(',')\ .flat_map{|x| self.root.xpath RexleCSS.new(x).to_xpath} end |
#current ⇒ Object
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# File 'lib/rexle.rb', line 355 def current() self end |
#deep_clone ⇒ Object
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# File 'lib/rexle.rb', line 954 def deep_clone() Rexle.new(self.xml).root end |
#delete(obj = nil) ⇒ Object Also known as: remove
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# File 'lib/rexle.rb', line 960 def delete(obj=nil) if obj then if obj.is_a? String then self.xpath(obj).each {|e| e.delete; e = nil} else i = @child_elements.index(obj) [@child_elements].each{|x| x.delete_at i} if i end else self.parent.delete(self) if self.parent end end |
#doc_root ⇒ Object
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# File 'lib/rexle.rb', line 996 def doc_root() @rexle.root end |
#each(&blk) ⇒ Object
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# File 'lib/rexle.rb', line 997 def each(&blk) self.children.each(&blk) end |
#each_recursive(&blk) ⇒ Object Also known as: traverse
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# File 'lib/rexle.rb', line 998 def each_recursive(&blk) recursive_scan(self.children,&blk) end |
#element(s) ⇒ Object
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# File 'lib/rexle.rb', line 981 def element(s) r = self.xpath(s) r.is_a?(Array) ? r.first : r end |
#elements(s = nil) ⇒ Object
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# File 'lib/rexle.rb', line 986 def elements(s=nil) procs = { NilClass: proc {Elements.new(@child_elements\ .select{|x| x.kind_of? Rexle::Element })}, String: proc {|x| @child_elements[x]} } procs[s.class.to_s.to_sym].call(s) end |
#filter_xpath(raw_path, rlist = [], &blk) ⇒ Object
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# File 'lib/rexle.rb', line 443 def filter_xpath(raw_path, rlist=[], &blk) #@log.debug 'inside filter_xpath : ' + raw_path.inspect path = String.new raw_path # is it a function fn_match = path.match(/^(\w+)\(["']?([^\)]*)["']?\)(?:\[(.*)\])?$/) #fn_match = path.match(/^(\w+)\(/) #@log.debug 'fn_match : ' + fn_match.inspect end_fn_match = path.slice!(/\[\w+\(\)\]$/) if end_fn_match then m = end_fn_match[1..-4] #@log.debug 'its a function' [method(m.to_sym).call(xpath path)] elsif (fn_match and fn_match.captures.first[/^(attribute|@)/]) procs = { Array: proc { |x| if block_given? then x.flatten(1) else rs = x.flatten rs.any?{|x| x == true or x == false} ? rs : rs.uniq(&:object_id) end }, String: proc {|x| x}, Hash: proc {|x| x}, TrueClass: proc{|x| x}, FalseClass: proc{|x| x}, :"Rexle::Element" => proc {|x| [x]} } bucket = [] raw_results = path.split('|').map do |xp| query_xpath(xp.strip, bucket, &blk) end results = raw_results procs[results.class.to_s.to_sym].call(results) if results elsif fn_match.nil? procs = { Array: proc { |x| if block_given? then x.flatten(1) else rs = x.flatten rs.any?{|x| x == true or x == false} ? rs : rs.uniq(&:object_id) end }, String: proc {|x| x}, Hash: proc {|x| x}, TrueClass: proc{|x| x}, FalseClass: proc{|x| x}, :"Rexle::Element" => proc {|x| [x]} } bucket = [] results = if path =~ /[\[]|\(/ then raw_results = path.split(/\|/).map do |xp| query_xpath(xp.strip, bucket, &blk) end raw_results.flatten.index(true) ? [true] : [] else raw_results = path.split(/ *(?:\||\band\b) */).map do |xp| query_xpath(xp.strip, bucket, &blk) end if path =~ / and / then raw_results.flatten.select {|x| x == true or x == false} else raw_results.flatten.index(true) ? [true] : [] end end return results if !path[/[><]/] and results.any? results = raw_results # .flatten.select {|x| x} procs[results.class.to_s.to_sym].call(results) if results else m, xpath_value, index = fn_match.captures if m == 'text' then a = texts() return index ? a[index.to_i - 1].to_s : a end #@log.debug 'before function call' raw_results = xpath_value.empty? ? method(m.to_sym).call \ : method(m.to_sym).call(xpath_value) raw_results end end |
#has_elements? ⇒ Boolean
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# File 'lib/rexle.rb', line 1000 def has_elements?() !self.elements.empty? end |
#insert_after(node) ⇒ Object
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# File 'lib/rexle.rb', line 1001 def insert_after(node) insert(node, 1) end |
#insert_before(node) ⇒ Object
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# File 'lib/rexle.rb', line 1002 def insert_before(node) insert(node) end |
#inspect ⇒ Object
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# File 'lib/rexle.rb', line 892 def inspect() if self.xml.length > 30 then "%s ... </>" % self.xml[/<[^>]+>/] else self.xml end end |
#last(a) ⇒ Object
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# File 'lib/rexle.rb', line 1003 def last(a) a.last end |
#lowercase(s) ⇒ Object
not yet implemented
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# File 'lib/rexle.rb', line 370 def lowercase(s) end |
#map(&blk) ⇒ Object
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# File 'lib/rexle.rb', line 1004 def map(&blk) self.children.map(&blk) end |
#max(path) ⇒ Object
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# File 'lib/rexle.rb', line 374 def max(path) a = query_xpath(path).flatten.select{|x| x.is_a? String or x.is_a? Rexle::Element::Attribute}.map(&:to_i) a.max end |
#next_element ⇒ Object Also known as: next_sibling
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# File 'lib/rexle.rb', line 395 def next_element() id = self.object_id a = self.parent.elements i = a.index {|x| x.object_id == id} + 2 a[i] if i < a.length + 1 end |
#not(bool) ⇒ Object
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# File 'lib/rexle.rb', line 407 def not(bool) r = self.xpath(bool).any? !r end |
#original_clone ⇒ Object
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# File 'lib/rexle.rb', line 312 alias original_clone clone |
#plaintext ⇒ Object
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# File 'lib/rexle.rb', line 1006 def plaintext() CGI.unescapeHTML xml().gsub(/<\/?[^>]+>/,'').gsub(' ',' ')\ .gsub(/\n\s+/,' ') end |
#prepend(item) ⇒ Object
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# File 'lib/rexle.rb', line 1094 def prepend(item) @child_elements.unshift item # add a reference from this element (the parent) to the child item.parent = self item end |
#previous_element ⇒ Object Also known as: previous_sibling
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# File 'lib/rexle.rb', line 414 def previous_element() id = self.object_id a = self.parent.elements i = a.index {|x| x.object_id == id} a[i] if i > 0 end |
#query_xpath(raw_xpath_value, rlist = [], &blk) ⇒ Object
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# File 'lib/rexle.rb', line 551 def query_xpath(raw_xpath_value, rlist=[], &blk) #@log.debug 'query_xpath : ' + raw_xpath_value.inspect #@log.debug '++ ' + self.xml.inspect flag_func = false xpath_value = raw_xpath_value.sub('child::','./') if xpath_value[/^[\w\/]+\s*=.*/] then flag_func = true xpath_value.sub!(/^\w+\s*=.*/,'.[\0]') xpath_value.sub!(/\/([\w]+\s*=.*)/,'[\1]') end raw_path, raw_condition = xpath_value.sub(/^\.?\/(?!\/)/,'')\ .match(/([^\[]+)(\[[^\]]+\])?/).captures remaining_path = ($').to_s #@log.debug 'remaining_path: ' + remaining_path.inspect if remaining_path[/^contains\(/] then raw_condition = raw_condition ? raw_condition + '/' + remaining_path \ : remaining_path remaining_path = '' end r = raw_path[/^([^\/]+)(?=\/\/)/,1] if r then a_path = raw_path.split(/(?=\/\/)/,2) else a_path = raw_path.split('/',2) end condition = raw_condition if a_path.length <= 1 #and not raw_condition[/^\[\w+\(.*\)\]$/] if raw_path[0,2] == '//' then s = '' elsif raw_path == 'text()' a_path.shift #return @value return self.texts else attribute = xpath_value[/^(attribute::|@)(.*)/,2] return @attributes if attribute == '*' if attribute and @attributes and \ @attributes.has_key?(attribute.to_sym) then return [Attribute.new(@attributes[attribute.to_sym])] end s = a_path.shift end # isolate the xpath to return just the path to the current element elmnt_path = s[/^([a-zA-Z:\-\*]+\[[^\]]+\])|[\/]+{,2}[^\/]+/] element_part = elmnt_path[/(^@?[^\[]+)?/,1] if elmnt_path if element_part then unless element_part[/^(@|[@\.a-zA-Z]+[\s=])/] then element_name = element_part[/^[\w:\-\*\.]+/] if element_name and element_name[/^\d/] then element_name = nil end condition = raw_xpath_value if element_name.nil? else if xpath_value[/^\[/] then condition = xpath_value element_name = nil else condition = element_part attr_search = format_condition('[' + condition + ']') #@log.debug 'attr_search : ' + attr_search.inspect return [attribute_search(attr_search, \ self, self.attributes) != nil] end end end #element_name ||= '*' raw_condition = '' if condition attr_search = format_condition(condition) if condition \ and condition.length > 0 puts ('1. attr_search: ' + attr_search.inspect).debug if $debug #@log.debug 'attr_search2 : ' + attr_search.inspect attr_search2 = xpath_value[/^\[(.*)\]$/,1] if attr_search2 then #@log.debug 'before attribute_Search' r4 = attribute_search(attr_search, self, self.attributes) return r4 end return_elements = [] if raw_path[0,2] == '//' then regex = /\[(\d+)\]$/ n = xpath_value[regex,1] xpath_value.slice!(regex) rs = scan_match(self, xpath_value).flatten.compact return n ? rs[n.to_i-1] : rs else if element_name.is_a? String then ename, raw_selector = (element_name.split('::',2)).reverse selector = case raw_selector when 'following-sibling' then 1 when 'preceding-sibling' then -1 end else ename = element_name end if ename == '..' then remaining_xpath = raw_path[/\.\.\/(.*)/,1] # select the parent element r2 = self.parent.xpath(remaining_xpath) return r2 elsif ename == '.' remaining_xpath = raw_path[1..-1] if remaining_xpath.empty? then if xpath_value.length > 0 and xpath_value =~ /\[/ then r = eval(attr_search.sub(/^h/,'self.attributes')) return self if r else return self end else return self.xpath(remaining_xpath) end elsif element_name.nil? puts ('attr_search: ' + attr_search.inspect).debug if $debug return eval attr_search else if raw_selector.nil? and ename != element_part then right_cond = element_part[/#{ename}(.*)/,1] end return_elements = @child_elements.map.with_index.select do |x, i| next unless x.is_a? Rexle::Element #x.name == ename or (ename == '*') r10 = ((x.name == ename) or (ename == '*')) end if right_cond then r12 = return_elements.map do |x, i| if x.text then r11 = eval "'%s'%s" % [x.text.to_s, right_cond] else false end end return r12 end if selector then ne = return_elements.inject([]) do |r,x| i = x.last + selector if i >= 0 then r << i else r end end return_elements = ne.map {|x| [@child_elements[x], x] if x} end end end if return_elements.length > 0 then if (a_path + [remaining_path]).join.empty? then # pass in a block to the filter if it is function contains? rlist = return_elements.map.with_index do |x,i| r5 = filter(x, i+1, attr_search, &blk) r5 end.compact rlist = rlist[0] if rlist.length == 1 else rlist << return_elements.map.with_index do |x,i| rtn_element = filter(x, i+1, attr_search) do |e| r = e.xpath(a_path.join('/') + raw_condition.to_s \ + remaining_path, &blk) r = e if r.is_a?(Array) and r.first and r.first == true \ and a_path.empty? r end next if rtn_element.nil? or (rtn_element.is_a? Array \ and rtn_element.empty?) if rtn_element.is_a? Hash then rtn_element elsif rtn_element.is_a? Array then rtn_element elsif (rtn_element.is_a? String) || (rtn_element.is_a?(Array) \ and not(rtn_element[0].is_a? String)) rtn_element elsif rtn_element.is_a? Rexle::Element rtn_element elsif rtn_element == true true end end rlist = rlist.flatten(1) unless rlist.length > 1 \ and rlist[0].is_a? Array rlist end rlist.compact! if rlist.is_a? Array else # strip off the 1st element from the XPath new_xpath = xpath_value[/^\/\/[\w:\-]+\/(.*)/,1] if new_xpath then self.xpath(new_xpath + raw_condition.to_s + remaining_path, \ rlist,&blk) end end rlist = rlist.flatten(1) unless not(rlist.is_a? Array) \ or (rlist.length > 1 and rlist[0].is_a? Array) rlist = [rlist] if rlist.is_a? Rexle::Element rlist = (rlist.length > 0 ? true : false) if flag_func == true rlist end |
#root ⇒ Object
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# File 'lib/rexle.rb', line 1011 def root() self end |
#text(s = '') ⇒ Object
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# File 'lib/rexle.rb', line 1013 def text(s='') return self.value if s.empty? e = self.element(s) return e if e.is_a? String e.value if e end |
#texts ⇒ Object
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# File 'lib/rexle.rb', line 1023 def texts() r = @child_elements.select do |x| x.is_a? String or x.is_a? Rexle::CData end r.map do |x| def x.unescape() s = self.to_s.clone %w(< < > > & & ' ').each_slice(2){|x| s.gsub!(*x)} s end end return r end |
#to_a ⇒ Object
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# File 'lib/rexle.rb', line 1068 def to_a() e = [String.new(self.name), Hash.new(self.attributes)] [*e, *scan_to_a(self.children)] end |
#xml(options = {}) ⇒ Object Also known as: to_s
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# File 'lib/rexle.rb', line 1073 def xml(={}) h = { Hash: lambda {|x| o = {pretty: false}.merge(x) msg = o[:pretty] == false ? :doc_print : :doc_pretty_print method(msg).call(self.children) }, String: lambda {|x| r = self.element(x) r ? r.xml : '' } } h[.class.to_s.to_sym].call end |
#xpath(path, rlist = [], &blk) ⇒ Object
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# File 'lib/rexle.rb', line 426 def xpath(path, rlist=[], &blk) #@log.debug 'inside xpath ' + path.inspect r = filter_xpath(path, rlist=[], &blk) #@log.debug 'after filter_xpath : ' + r.inspect if r.is_a?(Array) then Recordset.new(r.compact) else r end end |