Class: GenX::Builder
Instance Method Summary
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Constructor Details
#initialize(writer) ⇒ Builder
Returns a new instance of Builder.
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# File 'lib/genx4r/builder.rb', line 13
def initialize(writer)
@writer = writer
@elements = {}
@attributes = {}
@namespaces = {}
@indent = 2
@level = 0
end
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Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(sym, *args, &block) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 24
def method_missing(sym, *args, &block)
text = nil
attrs = nil
args.each do |arg|
case arg
when Hash
attrs ||= {}
attrs.merge!(arg)
else
text ||= ''
text << arg.to_s
end
end
_cache_element(sym)
_cache_attrs(attrs) unless attrs.nil?
if block
raise ArgumentError, 'can\'t have both text and block' unless text.nil?
_indent
@writer.element(@elements[sym]) do
_write_attrs(attrs) unless attrs.nil?
_write_contents(block)
end
_newline
else
_indent
@writer.element(@elements[sym]) do
_write_attrs(attrs) unless attrs.nil?
@writer.text(text) unless text.nil?
end
_newline
end
end
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Instance Method Details
#_begin_doc(io) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 103
def _begin_doc(io)
@writer.begin_document(io)
end
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#_cache_attrs(attrs) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 77
def _cache_attrs(attrs)
attrs.each_key do |attr|
unless @attributes.has_key?(attr)
@attributes[attr] = @writer.declare_attribute(attr.to_s)
end
end
end
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#_cache_element(sym) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 85
def _cache_element(sym)
unless @elements.has_key?(sym.to_s)
@elements[sym] = @writer.declare_element(sym.to_s)
end
end
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#_end_doc ⇒ Object
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# File 'lib/genx4r/builder.rb', line 107
def _end_doc
@writer.end_document
end
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#_indent ⇒ Object
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# File 'lib/genx4r/builder.rb', line 97
def _indent
unless @indent == 0 || @level == 0
@writer.text(" " * (@indent * @level))
end
end
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#_newline ⇒ Object
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# File 'lib/genx4r/builder.rb', line 91
def _newline
unless @indent == 0 || @level == 0
@writer.text("\n")
end
end
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#_write_attrs(attrs) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 71
def _write_attrs(attrs)
attrs.each_key do |attr|
@writer.attribute(@attributes[attr], attrs[attr])
end
end
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#_write_contents(block) ⇒ Object
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# File 'lib/genx4r/builder.rb', line 60
def _write_contents(block)
begin
@level += 1
_newline
block.call(self)
ensure
@level -= 1
_indent
end
end
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