Class: Fable::RuntimeObject

Inherits:
Object
  • Object
show all
Defined in:
lib/fable/runtime_object.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ RuntimeObject

Returns a new instance of RuntimeObject.



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# File 'lib/fable/runtime_object.rb', line 7

def initialize
  @path = nil
end

Instance Attribute Details

#original_object ⇒ Object

RuntimeObjects can be included in the main story as a hierarchy usually parents are container objectsd



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# File 'lib/fable/runtime_object.rb', line 5

def original_object
  @original_object
end

#own_debug_metadata ⇒ Object

RuntimeObjects can be included in the main story as a hierarchy usually parents are container objectsd



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# File 'lib/fable/runtime_object.rb', line 5

def own_debug_metadata
  @own_debug_metadata
end

#parent ⇒ Object

RuntimeObjects can be included in the main story as a hierarchy usually parents are container objectsd



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# File 'lib/fable/runtime_object.rb', line 5

def parent
  @parent
end

#path ⇒ Object

RuntimeObjects can be included in the main story as a hierarchy usually parents are container objectsd



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# File 'lib/fable/runtime_object.rb', line 5

def path
  @path
end

Instance Method Details

#compact_path_string(other_path) ⇒ Object

Find the most compact representation for a path, whether relative or global



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# File 'lib/fable/runtime_object.rb', line 129

def compact_path_string(other_path)
  if other_path.relative?
    relative_path_string = other_path.components_string
    global_path_string = self.path.path_by_appending_path(other_path).components_string
  else
    relative_path = convert_path_to_relative(other_path)
    relative_path_string = relative_path.components_string
    global_path_string = other_path.components_string
  end

  if relative_path_string.length < global_path_string.length
    return relative_path_string
  else
    return global_path_string
  end
end

#convert_path_to_relative(global_path) ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 88

def convert_path_to_relative(global_path)
  # 1. Find last shared ancestor
  # 2. Drill up using '..' style (actually represented as "^")
  # 3. Re-build downward chain from common ancestor

  own_path = self.path

  min_path_length = [global_path.length, own_path.length].min
  last_shared_path_comp_index = -1
  (0..min_path_length).each do |i|
    own_component = own_path.components[i]
    other_component = global_path.components[i]

    if own_component == other_component
      last_shared_path_comp_index = i
    else
      break
    end
  end

  # No shared path components, so just use global path
  if last_shared_path_comp_index == -1
    return global_path
  end

  number_of_upwards_moves = (own_path.length - 1) - last_shared_path_comp_index - 1
  new_path_components = []

  (0..number_of_upwards_moves).each do |i|
    new_path_components << Path::Component.parent_component
  end

  (last_shared_path_comp_index + 1..global_path.length).each do |i|
    new_path_components << global_path.components[i]
  end

  return Path.new(new_path_components, true)
end

#copy ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/fable/runtime_object.rb', line 155

def copy
  raise NotImplementedError, "#{self.class} doesn't support copying"
end

#debug_line_number_of_path(path) ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 25

def debug_line_number_of_path(path)
  return nil if path.nil?

  # Try to get a line number from debug metadata
  root = self.root_content_container

  if !root.nil?
    target_content = root.content_at_path(path).object
    if !target_content.nil?
      target_debug_metadata = target_content.debug_metadata
      if !target_debug_metadata.nil?
        target_debug_metadata.start_line_number
      end
    end
  end
end

#debug_metadata ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 11

def debug_metadata
  if @own_debug_metadata.nil?
    if !parent.nil?
      return parent.debug_metadata || DebugMetadata.new
    end
  end

  return @own_debug_metadata
end

#indentation_string(indentation = 0) ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 21

def indentation_string(indentation = 0)
  " " * indentation
end

#resolve_path(path) ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 73

def resolve_path(path)
  if path.relative?
    nearest_container = self

    if !nearest_container.is_a?(Container)
      nearest_container = self.parent
      path = path.tail
    end

    return nearest_container.content_at_path(path)
  else
    return self.root_content_container.content_at_path(path)
  end
end

#root_content_container ⇒ Object 



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# File 'lib/fable/runtime_object.rb', line 146

def root_content_container
  ancestor = self
  while !ancestor.parent.nil?
    ancestor = ancestor.parent
  end

  return ancestor
end