Class: AndroidXml::Tag

Inherits:
Object
  • Object
show all
Defined in:
lib/android-xml/tag.rb

Direct Known Subclasses

XmlFile

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(tag, *args, &block) ⇒ Tag

Returns a new instance of Tag.



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# File 'lib/android-xml/tag.rb', line 6

def initialize(tag, *args, &block)
  @buffer = []
  @attrs = {}
  @raw_tag = tag.to_s
  @text = nil

  if rename = AndroidXml.tags[tag.to_s][:rename]
    @tag = rename
  else
    @tag = tag.to_s.gsub('_', '-')
  end

  args.each do |arg|
    if arg.is_a?(Hash)
      @attrs.merge!(arg)
    elsif arg.is_a?(String)
      @text = arg
    else
      raise ArgumentError.new("Unknown argument #{arg.inspect} in #{self.class}#new")
    end
  end

  @generate = block
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *args, &block) ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 31

def method_missing(method_name, *args, &block)
  tag = Tag.new(method_name, *args, &block)
  @buffer << tag
  tag
end

Instance Attribute Details

#is_root ⇒ Object

Returns the value of attribute is_root.



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# File 'lib/android-xml/tag.rb', line 4

def is_root
  @is_root
end

Instance Method Details

#attrs(whitespace) ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 37

def attrs(whitespace)
  attrs = {}

  attrs.merge!(AndroidXml.all_tag[:defaults])
  if is_root
    attrs.merge!(AndroidXml.root_tag[:defaults])
  end

  attrs.merge!(AndroidXml.tags[@raw_tag][:defaults])
  attrs.merge!(@attrs)

  output = ''
  is_first = true
  attrs.each do |key, value|
    next if value.nil?

    key = key.to_s

    if AndroidXml.tags[@tag][:attrs].key?(key)
      xml_key = AndroidXml.tags[@tag][:attrs][key]
    elsif AndroidXml.all_tag[:attrs].key?(key)
      xml_key = AndroidXml.all_tag[:attrs][key]
    elsif key.to_s.include?(':')
      xml_key = key.to_s
    else
      xml_key = "android:#{key}"
    end

    if is_first
      output << " #{xml_key}=\"#{value}\""
      is_first = false
    else
      output << "\n#{whitespace}#{xml_key}=\"#{value}\""
    end
  end
  output
end

#generate(tab = '') ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 75

def generate(tab='')
  whitespace = "#{tab}  #{' ' * @tag.length}"
  output = "#{tab}<#{@tag}#{attrs(whitespace)}"
  if @generate
    inside = generate_block(tab + AndroidXml.tab)
    if !inside || inside.strip.empty?
      output << " />\n"
    else
      output << ">"
      if inside.lstrip.start_with?('<')
        output << "\n" << inside << "#{tab}</#{@tag}>\n"
      else
        output << inside << "</#{@tag}>\n"
      end
    end
  else
    output << " />\n"
  end

  output
end

#generate_block(tab = '') ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 97

def generate_block(tab='')
  return @block_output if @block_output

  output = ''
  if @generate
    text = instance_exec(&@generate)
    @buffer.each do |tag|
      output << tag.generate(tab)
    end
    if text.is_a?(String)
      if output.empty?
        output << text
      else
        output << tab << text << "\n"
      end
    end
  end

  @block_output = output
end

#out ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 126

def out
  puts to_s
end

#to_ary ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 122

def to_ary
  [to_s]
end

#to_s ⇒ Object 



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# File 'lib/android-xml/tag.rb', line 118

def to_s
  generate
end