Class: Hexp::Node::PP

Inherits:

Object

• Object
• Hexp::Node::PP

show all

Defined in:

lib/hexp/node/pp.rb

Overview

Class Method Summary (collapse)

• + (String) indent(string, indent = 2) private

  Indent a multiline string with a number of spaces.

Instance Method Summary (collapse)

• - (String) call private

  Perform the pretty-printing.

• - (PP) initialize(node) constructor private

  Create a new pretty-printer.

• - (String) pp_attributes private

  Format the node attributes.

• - (String) pp_children private

  Format the node children.

• - (String) pp_tag private

  Format the node tag.

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# File 'lib/hexp/node/pp.rb', line 10

def initialize(node)
  @node = node
end

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# File 'lib/hexp/node/pp.rb', line 65

def self.indent(string, indent = 2)
  string.lines.map {|line|  " "*indent + line}.join
end

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# File 'lib/hexp/node/pp.rb', line 19

def call
  [
    @node.class.inspect_name,
    pp_tag,
    PP.indent(pp_attributes + pp_children).strip
  ].join
end

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# File 'lib/hexp/node/pp.rb', line 41

def pp_attributes
  attrs = @node.attributes
  return '' if attrs.empty?
  ', ' + attrs.inspect
end

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# File 'lib/hexp/node/pp.rb', line 52

def pp_children
  children = @node.children
  return ']' if children.empty?
  ", [\n#{ children.map(&:pp).join(",\n") }]]"
end

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# File 'lib/hexp/node/pp.rb', line 32

def pp_tag
  "[#{@node.tag.inspect}"
end