Class: Fusuma::Plugin::Detectors::TouchDetector

Inherits:
Detector
  • Object
show all
Defined in:
lib/fusuma/plugin/detectors/touch_detector.rb

Constant Summary collapse

SOURCES = 
%w[touch timer].freeze

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TouchDetector 



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# File 'lib/fusuma/plugin/detectors/touch_detector.rb', line 18

def initialize(*)
  super
  @detectors = [
    Fusuma::Plugin::Detectors::TouchDetectors::TapDetector.new,
    (@hold_detector = Fusuma::Plugin::Detectors::TouchDetectors::HoldDetector.new),
    Fusuma::Plugin::Detectors::TouchDetectors::SwipeDetector.new,
    Fusuma::Plugin::Detectors::TouchDetectors::PinchDetector.new,
    # Fusuma::Plugin::Detectors::TouchDetectors::RotateDetector.new,
    # Fusuma::Plugin::Detectors::TouchDetectors::EdgeDetector.new
  ]
  @last_known_gesture = nil
end

Instance Method Details

#detect(buffers) ⇒ Object 



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# File 'lib/fusuma/plugin/detectors/touch_detector.rb', line 31

def detect(buffers)
  events = []

  timer_buffer = buffers.find { |b| b.type == 'timer' }
  touch_buffer = buffers.find { |b| b.type == 'touch' }
  @touch_buffer = touch_buffer || @touch_buffer

  if timer_buffer &&
    timer_buffer.events.any? &&
    @last_known_gesture &&
    (timer_buffer.events.last.time - @last_known_gesture.time) > event_expire_time

    # TODO: should we also clear the touch buffer?
    events << create_event(record: @last_known_gesture.record.create_index_record(status: 'end', trigger: :repeat)) if @last_known_gesture.record.repeatable?
    @last_known_gesture = nil
  end

  if timer_buffer
    # if this is a timer tick, we have to have saved touch buffer to work with
    return events if @touch_buffer.nil? || @touch_buffer.empty?
  else
    # if not, we have to have a new touch buffer events
    return events if touch_buffer.nil? || touch_buffer.empty?
  end

  # current gesture ended or even new gesture began
  # if (@touch_buffer.ended? || @touch_buffer.began?) && @last_known_gesture
  #   events << create_event(record: @last_known_gesture.record.create_index_record(status: 'end', trigger: :repeat)) if @last_known_gesture.record.repeatable?
  #   @last_known_gesture = nil
  # end

  gesture_record = nil
  if touch_buffer
    @detectors.each do |detector|
      gesture_record = detector.detect(@touch_buffer)
      break if gesture_record
    end
  else
    return events if @touch_buffer.empty?
    gesture_record = @hold_detector.detect(@touch_buffer)
  end

  if gesture_record
    # repeat previous gesture
    if gesture_record.repeatable? && @last_known_gesture&.record == gesture_record
      @last_known_gesture = create_event(record: gesture_record)
      if touch_buffer.ended?
        events << create_event(record: gesture_record.create_index_record(status: 'end', trigger: :repeat))
      else
        events << create_event(record: gesture_record.create_index_record(status: 'update', trigger: :repeat))
      end
    # new gesture (repeatable or not)
    else
      events << create_event(record: @last_known_gesture.record.create_index_record(status: 'end', trigger: :repeat)) if @last_known_gesture&.record&.repeatable?
      @last_known_gesture = create_event(record: gesture_record)
      events << create_event(record: gesture_record.create_index_record)
      if gesture_record.repeatable?
        events << create_event(record: gesture_record.create_index_record(status: 'begin', trigger: :repeat))
        # already ended? (in this very same tick)
        events << create_event(record: gesture_record.create_index_record(status: 'end', trigger: :repeat)) if touch_buffer.ended?
      end
    end
    @touch_buffer.clear
  # no new gesture, but may be the previous one ended?
  elsif @touch_buffer&.ended? && @last_known_gesture
    events << create_event(record: @last_known_gesture.record.create_index_record(status: 'end', trigger: :repeat)) if @last_known_gesture.record.repeatable?
    @last_known_gesture = nil
  end

  events
end