[Chromoting] Add InputMonitor and InputState

remoting/android/java/src/org/chromium/chromoting/TouchInputHandler.java

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chromoting;
 
 import android.content.Context;
 import android.graphics.Matrix;
 import android.graphics.Point;
 import android.graphics.PointF;
@@ skipping 438 matching lines @@
             int pointerCount = e2.getPointerCount();
 
             // Check to see if the motion originated at the edge of the screen.
             // If so, then the user is likely swiping in to display system UI.
             if (!mPanGestureBounds.contains((int) e1.getX(), (int) e1.getY())) {
                 // Prevent the cursor being moved or flung by the gesture.
                 mSuppressCursorMovement = true;
                 return false;
             }
 
-            if (pointerCount == 3 && !mSwipeCompleted) {
+            if (pointerCount >= 3 && !mSwipeCompleted) {
                 // Note that distance values are reversed. For example, dragging a finger in the
                 // direction of increasing Y coordinate (downwards) results in distanceY being
                 // negative.
                 mTotalMotionY -= distanceY;
                 return onSwipe();
             }
 
             if (pointerCount == 2 && mSwipePinchDetector.isSwiping()) {
                 if (!mInputStrategy.isIndirectInputMode()) {
                     // Ensure the cursor is located at the coordinates of the original event,
@@ skipping 167 matching lines @@
                 imageWidth = mRenderData.imageWidth;
                 imageHeight = mRenderData.imageHeight;
             }
             screenToImage.mapPoints(mappedPoints);
 
             return (mappedPoints[0] >= 0 && mappedPoints[0] <= imageWidth)
                     && (mappedPoints[1] >= 0 && mappedPoints[1] <= imageHeight);
         }
     }
 }