Class: ActionviewPrecompiler::PrismASTParser::RenderNode

Inherits:
Object
  • Object
show all
Defined in:
lib/actionview_precompiler/ast_parser/prism.rb

Overview

This class represents a node in the tree that is returned by the parser that corresponds to an argument to a render call, or a child of one of those nodes.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ RenderNode

Returns a new instance of RenderNode.



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 28

def initialize(node)
  @node = node
end

Instance Attribute Details

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 26

def node
  @node
end

Instance Method Details

#call? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 32

def call?
  node.is_a?(Prism::CallNode)
end

#call_method_name ⇒ Object 



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 62

def call_method_name
  node.message
end

#hash? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 36

def hash?
  node.is_a?(Prism::HashNode) || node.is_a?(Prism::KeywordHashNode)
end

#string? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 40

def string?
  node.is_a?(Prism::StringNode)
end

#symbol? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 44

def symbol?
  node.is_a?(Prism::SymbolNode)
end

#to_hash ⇒ Object

Converts the node into a hash where the keys and values are nodes. This will raise an error if the hash doesn’t match the format we expect or if the hash contains any splats.



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 79

def to_hash
  if hash?
    if node.elements.all? { |assoc| assoc.is_a?(Prism::AssocNode) && assoc.key.is_a?(Prism::SymbolNode) }
      node.elements.to_h { |assoc| [RenderNode.new(assoc.key), RenderNode.new(assoc.value)] }
    end
  else
    raise CompilationError, "Unexpected node type: #{node.inspect}"
  end
end

#to_string ⇒ Object

Converts the node into a string value. Only handles plain string content, and will raise an error if the node contains interpolation.



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 91

def to_string
  if string?
    node.unescaped
  else
    raise CompilationError, "Unexpected node type: #{node.inspect}"
  end
end

#to_symbol ⇒ Object

Converts the node into a symbol value. Only handles labels and plain symbols, and will raise an error if the node contains interpolation.



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 101

def to_symbol
  if symbol?
    node.unescaped.to_sym
  else
    raise CompilationError, "Unexpected node type: #{node.inspect}"
  end
end

#variable_name ⇒ Object 



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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 66

def variable_name
  case node.type
  when :class_variable_read_node, :instance_variable_read_node,
       :global_variable_read_node, :local_variable_read_node
    node.name.name
  when :call_node
    node.message
  end
end

#variable_reference? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 48

def variable_reference?
  case node.type
  when :class_variable_read_node, :instance_variable_read_node,
       :global_variable_read_node, :local_variable_read_node
    true
  else
    false
  end
end

#vcall? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/actionview_precompiler/ast_parser/prism.rb', line 58

def vcall?
  node.is_a?(Prism::CallNode) && node.variable_call?
end