<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>gestures_test.html</title>
  <link rel="stylesheet" href="/filez/_main/third_party/js/qunit/qunit.css">
  <script src="/filez/_main/third_party/js/qunit/qunit.js"></script>
  <script src="/filez/_main/third_party/js/qunit/qunit_test_runner.js"></script>
  <script src="test_bootstrap.js"></script>
  <script type="text/javascript">
    goog.require('bot.action');
    goog.require('bot.userAgent');
    goog.require('goog.dom');
    goog.require('goog.events');
    goog.require('goog.events.EventType');
    goog.require('goog.userAgent.product');
  </script>
  <script type="text/javascript">
    var elem, startCoords, firstMoveCoords, secondMoveCoords, endCoords;

    QUnit.testStart(function() {
      elem = goog.dom.getElement('multitouch');
      goog.events.removeAll(elem);
      startCoords = [];
      firstMoveCoords = [];
      secondMoveCoords = [];
      endCoords = [];

      function handleCoords(event, touchListName) {
        event.preventDefault();
        var e = event.getBrowserEvent();
        var touches = e[touchListName];
        if (touches.length !== 2) {
          throw new Error('Expected 2 touches, got ' + touches.length);
        }
        var touch0 = touches[0], touch1 = touches[1];
        return [
          new goog.math.Coordinate(touch0.clientX, touch0.clientY),
          new goog.math.Coordinate(touch1.clientX, touch1.clientY)
        ];
      }

      goog.events.listen(elem, goog.events.EventType.TOUCHSTART, function(e) {
        if (startCoords.length) {
          throw new Error('touchstart already fired');
        }
        startCoords = handleCoords(e, 'touches');
      });

      goog.events.listen(elem, goog.events.EventType.TOUCHMOVE, function(e) {
        if (secondMoveCoords.length) {
          throw new Error('two touchmoves already fired');
        }
        if (!firstMoveCoords.length) {
          firstMoveCoords = handleCoords(e, 'touches');
        } else {
          secondMoveCoords = handleCoords(e, 'touches');
        }
      });

      goog.events.listen(elem, goog.events.EventType.TOUCHEND, function(e) {
        if (endCoords.length) {
          throw new Error('touchend already fired');
        }
        endCoords = handleCoords(e, 'changedTouches');
      });

      function handlePointerCoords(event) {
        event.preventDefault();
        var e = event.getBrowserEvent();
        return new goog.math.Coordinate(e.clientX, e.clientY);
      }

      goog.events.listen(elem, goog.events.EventType.MSPOINTERDOWN,
                         function(e) {
        if (startCoords.length >= 2) {
          throw new Error('MSPointerDown already fired');
        }
        startCoords.push(handlePointerCoords(e));
      });

      goog.events.listen(elem, goog.events.EventType.MSPOINTERMOVE,
                         function(e) {
        if (secondMoveCoords.length >= 2) {
          throw new Error('MSPointerMoves already fired');
        }
        if (firstMoveCoords.length < 2) {
          firstMoveCoords.push(handlePointerCoords(e));
        } else {
          secondMoveCoords.push(handlePointerCoords(e));
        }
      });

      goog.events.listen(elem, goog.events.EventType.MSPOINTERUP, function(e) {
        if (endCoords.length >= 2) {
          throw new Error('MSPointerUp already fired');
        }
        endCoords.push(handlePointerCoords(e));
      });
    });

    var EPSILON = 0.01;

    function assertApproxEquals(assert, comment, expected, actual) {
      if (goog.userAgent.product.ANDROID &&
          bot.userAgent.isProductVersion(4)) {
        var expectedMinFloor = Math.floor(expected - EPSILON);
        var expectedMaxFloor = Math.floor(expected + EPSILON);
        assert.ok(actual >= expectedMinFloor, comment + ' (min floor)');
        assert.ok(actual <= expectedMaxFloor, comment + ' (max floor)');
      } else {
        assert.ok(Math.abs(expected - actual) <= EPSILON, comment + ': expected ' + expected + ', got ' + actual);
      }
    }

    function assertMultitouchPoints(assert, start0X, start0Y, start1X, start1Y,
        mid0X, mid0Y, mid1X, mid1Y, end0X, end0Y, end1X, end1Y) {
      assertApproxEquals(assert, 'start 0 x', start0X, startCoords[0].x);
      assertApproxEquals(assert, 'start 0 y', start0Y, startCoords[0].y);
      assertApproxEquals(assert, 'start 1 x', start1X, startCoords[1].x);
      assertApproxEquals(assert, 'start 1 y', start1Y, startCoords[1].y);

      assertApproxEquals(assert, 'first move 0 x', mid0X, firstMoveCoords[0].x);
      assertApproxEquals(assert, 'first move 0 y', mid0Y, firstMoveCoords[0].y);
      assertApproxEquals(assert, 'first move 1 x', mid1X, firstMoveCoords[1].x);
      assertApproxEquals(assert, 'first move 1 y', mid1Y, firstMoveCoords[1].y);

      assertApproxEquals(assert, 'second move 0 x', end0X, secondMoveCoords[0].x);
      assertApproxEquals(assert, 'second move 0 y', end0Y, secondMoveCoords[0].y);
      assertApproxEquals(assert, 'second move 1 x', end1X, secondMoveCoords[1].x);
      assertApproxEquals(assert, 'second move 1 y', end1Y, secondMoveCoords[1].y);

      assertApproxEquals(assert, 'end 0 x', end0X, endCoords[0].x);
      assertApproxEquals(assert, 'end 0 y', end0Y, endCoords[0].y);
      assertApproxEquals(assert, 'end 1 x', end1X, endCoords[1].x);
      assertApproxEquals(assert, 'end 1 y', end1Y, endCoords[1].y);
    }

    QUnit.test('PinchInward', function(assert) {
      if (!bot.events.SUPPORTS_TOUCH_EVENTS) {
        assert.ok(true, 'Skipping: touch events not supported');
        return;
      }
      var pinchDistance = Math.sqrt(2 * 50 * 50) / 2;
      bot.action.pinch(elem, pinchDistance);
      assertMultitouchPoints(assert, /* start */ 100, 100, 0, 0,
                             /* mid */ 87.5, 87.5, 12.5, 12.5,
                             /* end */ 75, 75, 25, 25);
    });

    QUnit.test('PinchOutward', function(assert) {
      if (!bot.events.SUPPORTS_TOUCH_EVENTS) {
        assert.ok(true, 'Skipping: touch events not supported');
        return;
      }
      var pinchDistance = -Math.sqrt(2 * 50 * 50) / 2;
      bot.action.pinch(elem, pinchDistance);
      assertMultitouchPoints(assert, /* start */ 75, 75, 25, 25,
                             /* mid */ 87.5, 87.5, 12.5, 12.5,
                             /* end */ 100, 100, 0, 0);
    });

    QUnit.test('RotateClockwise', function(assert) {
      if (!bot.events.SUPPORTS_TOUCH_EVENTS) {
        assert.ok(true, 'Skipping: touch events not supported');
        return;
      }
      bot.action.rotate(elem, 90);
      var midYOffset = Math.sqrt(2 * 25 * 25);
      assertMultitouchPoints(assert, /* start */ 75, 75, 25, 25,
                             /* mid */ 50, 50 + midYOffset, 50, 50 - midYOffset,
                             /* end */ 25, 75, 75, 25);
    });

    QUnit.test('RotateCounterClockwise', function(assert) {
      if (!bot.events.SUPPORTS_TOUCH_EVENTS) {
        assert.ok(true, 'Skipping: touch events not supported');
        return;
      }
      bot.action.rotate(elem, -90);
      var midXOffset = Math.sqrt(2 * 25 * 25);
      assertMultitouchPoints(assert, /* start */ 75, 75, 25, 25,
                             /* mid */ 50 + midXOffset, 50, 50 - midXOffset, 50,
                             /* end */ 75, 25, 25, 75);
    });
    </script>
</head>
<body>
  <div id="qunit"></div>
  <div id="qunit-fixture"></div>
  <div id="multitouch"
       style="position:fixed;
              left:0px;
              top:0px;
              width:100px;
              height:100px;
              -ms-touch-action:none">
    multitouch
  </div>
</body>
</html>