Class: Boxer

Inherits:
Object
  • Object
show all
Defined in:
lib/boxer.rb,
lib/boxer/version.rb

Defined Under Namespace

Classes: ViewMissingError

Constant Summary collapse

VERSION = 
"1.0.2"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}, &block) ⇒ Boxer

Returns a new instance of Boxer.



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# File 'lib/boxer.rb', line 16

def initialize(name, options={}, &block)
  @name = name
  @block = block
  @fallback = []
  @views = {}
  @views_chain = {}
  @options = options
end

Class Method Details

.box(name, options = {}, &block) ⇒ Object

class methods



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# File 'lib/boxer.rb', line 27

def self.box(name, options={}, &block)
  (@boxes ||= {})[name] = self.new(name, options, &block)
end

.boxes ⇒ Object 



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# File 'lib/boxer.rb', line 31

def self.boxes
  @boxes
end

.clear! ⇒ Object 



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# File 'lib/boxer.rb', line 35

def self.clear!
  @boxes = {}
end

.configure {|config| ... } ⇒ Object

Yields:

  • (config) 


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# File 'lib/boxer.rb', line 39

def self.configure
  yield config
end

.ship(name, *args) ⇒ Object 



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# File 'lib/boxer.rb', line 43

def self.ship(name, *args)
  fail "Unknown box: #{name.inspect}" unless @boxes.has_key?(name)
  @boxes[name].ship(*args)
end

Instance Method Details

#emit(val) ⇒ Object

instance methods



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# File 'lib/boxer.rb', line 50

def emit(val)
  @fallback = [val]
end

#precondition {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:

  • _self (Boxer) —

    the object that the method was called on



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# File 'lib/boxer.rb', line 85

def precondition
  yield self
end

#ship(*args) ⇒ Object 



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# File 'lib/boxer.rb', line 54

def ship(*args)
  args = args.dup
  if args.last.is_a?(Hash)
    args[-1] = args.last.dup
    view = args.last.delete(:view)
    args.slice!(-1) if args.last.empty?
  end
  view ||= :base

  modules = self.class.config.box_includes
  black_box = Class.new do
    modules.each do |mod|
      include mod
    end
  end
  block_result = black_box.new.instance_exec(self, *args, &@block)

  if @fallback.length > 0
    return @fallback.pop
  elsif @views_chain.any?
    unless @views_chain.has_key?(view)
      fail ViewMissingError.new([@name, view].map(&:inspect).join('/'))
    end
    return @views_chain[view].inject({}) do |res, view_name|
      res.deep_merge(@views[view_name].call(*args))
    end
  else
    return block_result
  end
end

#view(name, opts = {}, &block) ⇒ Object 



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# File 'lib/boxer.rb', line 89

def view(name, opts={}, &block)
  @views_chain[name] = []
  if opts.has_key?(:extends)
    ancestors = Array(opts[:extends]).map do |parent|
      (@views_chain[parent] || []) + [parent]
    end.flatten.uniq
    @views_chain[name] += ancestors
  end
  @views_chain[name] << name

  @views[name] = block
end