Module: Fabulator::Expr::NodeLogic

Included in:
Node
Defined in:
lib/fabulator/expr/node_logic.rb

Instance Method Summary collapse

Instance Method Details

#copy(c) ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 67

def copy(c)
  self.value = c.value
  self.vtype = c.vtype
  # TODO: attributes
  
  c.attributes.each do |a|
    self.set_attribute(a.name,a.value)
  end
  c.children.each do |cc|
    n = self.create_child(cc.name, cc.value)
    n.copy(cc)
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fabulator/expr/node_logic.rb', line 81

def empty?
  self.value.nil? && self.children.empty?
end

#in_context(&block) ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 55

def in_context(&block)
    yield
end

#path ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 59

def path
  if self.parent.nil? || self.parent == self
    return ''
  else
    return self.parent.path + '/' + (self.is_attribute? ? '@' : '') + self.name
  end
end

#root(a = nil) ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 85

def root(a = nil)
  if(a.nil? || a == '')
    a = self.axis
  end
  if a.nil? || a == '' || self.roots[a].nil?
    p = self
    while !p.parent.nil? && p.parent != self
      p = p.parent
    end
    self.roots[a] = p unless a.nil? || a == ''
    return p
  else
    self.roots[a.nil? ? self.axis : a]
  end
end

#to(t, ctx = nil) ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 24

def to(t, ctx = nil)
  if @vtype.nil? || t.nil?
    return self.anon_node(self.value, self.vtype)
  end
  if self.vtype.join('') == t.join('')
    return self
  end
  # see if there's a path between @vtype and t
  #   if so, do the conversion
  #   otherwise, return nil
  path = Fabulator::TagLib.type_path(self.vtype, t)
  return self.anon_node(nil,nil) if path.empty?
  v = self
  ctx = Fabulator::Expr::Context.new if ctx.nil?
  path.each do |p|
    vv = nil
    begin
      vv = p.convert(ctx.with_root(v))
    rescue => e
      raise "Converting to #{t[1]} raised #{e}"
    end
    if vv.is_a?(Fabulator::Expr::Node)
      v = vv
    else
      v = self.anon_node(vv)
    end
  end
  v.vtype = t
  return v
end

#to_h ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 8

def to_h
  r = { }
  #  :attributes => { },

  r[:name] = self.name unless self.name.nil?
  cs = self.children.collect { |c| c.to_h }
  r[:children] = cs unless cs.empty?
  r[:value] = self.value unless self.value.nil?
  r[:type] = self.vtype.join('') unless self.vtype.nil?
  r[:attributes] = { }
  self.attributes.each do |a|
    r[:attributes][a.name] = a.value
  end
  r
end

#to_s ⇒ Object 



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# File 'lib/fabulator/expr/node_logic.rb', line 4

def to_s
  self.to([ FAB_NS, 'string' ]).value
end