Module: Psychgus::Blueberry

Defined in:
lib/psychgus/blueberry.rb

Overview

This is the OOP way to style your classes/modules/etc.

Even though it’s unnecessary to mix in (include) this module, it’s recommended because new methods may be added in the future, so this pseudo-guarantees your class won’t break in a new version.

A complete example:

require 'psychgus'

class MyClass
  include Psychgus::Blueberry

  attr_reader :my_hash

  def initialize()
    @my_hash = {:key1=>'val1',:key2=>'val2'}
  end

  def psychgus_stylers(sniffer)
    return MyClassStyler.new(sniffer)
  end
end

class MyClassStyler
  include Psychgus::Styler

  def initialize(sniffer)
    @level = sniffer.level
  end

  def style_mapping(sniffer,node)
    node.style = Psychgus::MAPPING_FLOW

    relative_level = sniffer.level - @level
  end
end

my_class = MyClass.new()
puts my_class.to_yaml()

Alternatively, MyClass could have been the Blueberry and the Styler, without the need for MyClassStyler:

class MyClass
  include Psychgus::Blueberry
  include Psychgus::Styler

  # ...

  def psychgus_stylers(sniffer)
    @level = sniffer.level # This will be included in the output of to_yaml()

    return self
  end

  def style_mapping(sniffer,node)
    # ...
  end
end

However, it’s best to put the styling logic inside of a separate class (or inner class) away from the main logic. This also prevents extra helper vars, like @level, from showing up in the output.

After your class and its children have been processed, the styler(s) will be removed from the logic for the next sibling object(s). Therefore, you can safely do class-specific checks on level, etc. without it affecting the sibling object(s). See Ext::YAMLTreeExt and Ext::YAMLTreeExt#accept for details.

“The Blueberry” is the name of Gus’s car from the TV show Psych.

See Also:

Instance Method Summary collapse

Instance Method Details

#psychgus_stylers(sniffer) ⇒ Styler, ...

Duck Type this method to return the Styler(s) for your class/module/etc.

Parameters:

  • sniffer (SuperSniffer) —

    passed in from StyledTreeBuilder; use this for storing the level, position, etc. for styling your instance variables later relative to your class/module/etc.

Returns:



91
92
93
 
# File 'lib/psychgus/blueberry.rb', line 91

def psychgus_stylers(sniffer)
  return nil
end