Class: Bowline::Watcher

Inherits:

Object

• Object
• Bowline::Watcher

show all

Defined in:

lib/bowline/watcher.rb

Instance Method Summary (collapse)

• - (Object) append(event, method = nil, oneshot = false, &block)

  Add new method/proc to a specific event.

• - (Object) call(event, *args)

  Call an event's callbacks with provided arguments.

• - (Object) clear

  Clear all events and callbacks.

• - (Watcher) initialize constructor

  A new instance of Watcher.

• - (Object) remove(event, value = nil)

  Remove an specific callback on an event, or all an event's callbacks.

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# File 'lib/bowline/watcher.rb', line 90

def initialize
  @listeners = {}
end

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# File 'lib/bowline/watcher.rb', line 95

def append(event, method = nil, oneshot = false, &block)
  callback = Callback.new(self, event, method||block, oneshot)
  (@listeners[event] ||= []) << callback
  callback
end

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# File 'lib/bowline/watcher.rb', line 102

def call(event, *args)
  return unless @listeners[event]
  @listeners[event].each do |callback|
    callback.call(*args)
  end
end

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# File 'lib/bowline/watcher.rb', line 124

def clear
  @listeners = {}
end

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# File 'lib/bowline/watcher.rb', line 111

def remove(event, value=nil)
  return unless @listeners[event]
  if value
    @listeners[event].delete(value)
    if @listeners[event].empty?
      @listeners.delete(event)
    end
  else
    @listeners.delete(event)
  end
end