Module: Matplotlib::IRuby::HookExtension

Defined in:
lib/matplotlib/iruby.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extended(obj) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 6

def self.extended(obj)
  @event_registry ||= {}
  @event_registry[obj] = {}
end

.register_event(target, event, hook) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 11

def self.register_event(target, event, hook)
  @event_registry[target][event] ||= []
  @event_registry[target][event] << hook
end

.trigger_event(target, event) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 30

def self.trigger_event(target, event)
  return unless @event_registry[target][event]
  @event_registry[target][event].each do |hooks|
    hooks.to_a.each do |hook|
      hook.call if hook
    end
  end
rescue Exception
  $stderr.puts "Error occurred in triggerred event: target=#{target} event=#{event}", $!.to_s, *$!.backtrace
end

.unregister_event(target, event, hook) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 20

def self.unregister_event(target, event, hook)
  return unless @event_registry[target]
  return unless @event_registry[target][event]
  @event_registry[target][event].delete(hook)
end

Instance Method Details

#execute_request(msg) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 45

def execute_request(msg)
  code = msg[:content]['code']
  @execution_count += 1 if msg[:content]['store_history']
  @session.send(:publish, :execute_input, code: code, execution_count: @execution_count)

  trigger_event(:pre_execute)

  content = {
    status: :ok,
    payload: [],
    user_expressions: {},
    execution_count: @execution_count
  }
  result = nil
  begin
    result = @backend.eval(code, msg[:content]['store_history'])
  rescue SystemExit
    content[:payload] << { source: :ask_exit }
  rescue Exception => e
    content = error_content(e)
    @session.send(:publish, :error, content)
  end

  unless result.nil? || msg[:content]['silent']
    @session.send(:publish, :execute_result,
                  data: ::IRuby::Display.display(result),
                  metadata: {},
                  execution_count: @execution_count)
  end

  trigger_event(:post_execute)

  @session.send(:reply, :execute_reply, content)
end

#register_event(event, hook = nil, &block) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 16

def register_event(event, hook=nil, &block)
  HookExtension.register_event(self, event, [hook, block].compact)
end

#trigger_event(event) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 41

def trigger_event(event)
  HookExtension.trigger_event(self, event)
end

#unregister_event(event, hook) ⇒ Object 



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# File 'lib/matplotlib/iruby.rb', line 26

def unregister_event(event, hook)
  HookExtension.unregister_event(self, event, hook)
end