[Chromoting] Decouple DesktopView and TouchInputHandler

remoting/android/java/src/org/chromium/chromoting/TouchInputHandlerInterface.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.graphics.Rect;
 import android.view.MotionEvent;
 
+import org.chromium.chromoting.jni.Client;
+
 /**
  * This interface allows multiple styles of touchscreen UI to be implemented and dynamically
  * switched. The DesktopView passes the low-level touchscreen events and other events via this
  * interface. The implementation recognizes and processes the touchscreen gestures, and then
  * performs actions on the DesktopView (such as panning/zooming the display, injecting input, or
  * showing/hiding UI elements). All methods are called on the main UI thread.
  */
 public interface TouchInputHandlerInterface {
     // These constants must match those in the generated struct protocol::MouseEvent_MouseButton.
     int BUTTON_UNDEFINED = 0;
     int BUTTON_LEFT = 1;
     int BUTTON_MIDDLE = 2;
     int BUTTON_RIGHT = 3;
 
     /**
+     * Initializes the instance. Implementations can assume this function will be called exactly
+     * once after constructor but before other functions.
+     */
+    void init(Desktop desktop, Client client);
+
+    /**
      * Processes a touch event. This should be called by the View in its onTouchEvent() handler.
      */
     boolean onTouchEvent(MotionEvent event);
 
     /**
      * Called whenever the client display area changes size. The caller will handle repainting
      * after this method returns.
      */
     void onClientSizeChanged(int width, int height);
 
     /**
      * Called when the host screen size is changed. The caller will handle repainting after this
      * method returns.
      */
     void onHostSizeChanged(int width, int height);
 
     /**
-     * Called when the visibility of the soft input method has changed.
-     * The innerBounds parameter describes the amount of space used by SystemUI along each edge of
-     * the screen.  The status bar is typically shown along the top, soft input UI is generally
-     * shown at the bottom.  The navigation bar is shown along the bottom for tablets and along the
-     * right side for phones in landscape mode (it shown at the bottom in portrait mode).
-     */
-    void onSoftInputMethodVisibilityChanged(boolean inputMethodVisible, Rect innerBounds);
-
-    /**
      * Whilst an animation is in progress, this method is called repeatedly until the animation is
      * cancelled. After this method returns, the DesktopView will schedule a repaint.
      */
     void processAnimation();
-
-    /** Sets the underlying strategy to use when translating and forwarding local touch input. */
-    void setInputStrategy(InputStrategyInterface inputStrategy);
 }