Class: Dommy::BroadcastChannel

Inherits:
Object
  • Object
show all
Includes:
EventTarget
Defined in:
lib/dommy/message_channel.rb

Overview

‘BroadcastChannel` — same-origin pub/sub. Dommy keeps a per-window channel registry; sending posts to all other peers on the same name within the same Window.

Constant Summary collapse

@@registries = 
Hash.new { |h, w| h[w] = Hash.new { |c, n| c[n] = [] } }

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from EventTarget

#__deliver_event__, #add_event_listener, #dispatch_event, #invoke_listener, #remove_event_listener

Constructor Details

#initialize(window, name) ⇒ BroadcastChannel

Returns a new instance of BroadcastChannel.



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# File 'lib/dommy/message_channel.rb', line 172

def initialize(window, name)
  @window = window
  @name = name.to_s
  @closed = false
  @onmessage = nil
  @@registries[window][@name] << self
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/dommy/message_channel.rb', line 170

def name
  @name
end

Instance Method Details

#__event_parent__ ⇒ Object 



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# File 'lib/dommy/message_channel.rb', line 245

def __event_parent__
  nil
end

#__js_call__(method, args) ⇒ Object 



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# File 'lib/dommy/message_channel.rb', line 230

def __js_call__(method, args)
  case method
  when "postMessage"
    post_message(args[0])
  when "close"
    close
  when "addEventListener"
    add_event_listener(args[0], args[1], args[2])
  when "removeEventListener"
    remove_event_listener(args[0], args[1])
  when "dispatchEvent"
    dispatch_event(args[0])
  end
end

#__js_get__(key) ⇒ Object 



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# File 'lib/dommy/message_channel.rb', line 210

def __js_get__(key)
  case key
  when "name"
    @name
  when "onmessage"
    @onmessage
  end
end

#__js_set__(key, value) ⇒ Object 



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# File 'lib/dommy/message_channel.rb', line 219

def __js_set__(key, value)
  case key
  when "onmessage"
    remove_event_listener("message", @onmessage) if @onmessage
    @onmessage = value
    add_event_listener("message", value) if value
  end

  nil
end

#close ⇒ Object 



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# File 'lib/dommy/message_channel.rb', line 198

def close
  return if @closed

  @closed = true
  @@registries[@window][@name].delete(self)
  nil
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dommy/message_channel.rb', line 206

def closed?
  @closed
end

#post_message(data) ⇒ Object Also known as: postMessage 



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# File 'lib/dommy/message_channel.rb', line 180

def post_message(data)
  return if @closed

  peers = @@registries[@window][@name].reject { |p| p.equal?(self) || p.closed? }
  cloned = Dommy.structured_clone(data)
  peers.each do |peer|
    @window.scheduler.queue_microtask(
      proc do
        peer.dispatch_event(MessageEvent.new("message", "data" => cloned))
      end
    )
  end

  nil
end