src/mojo/services/native_viewport/android/src/org/chromium/mojo/PlatformViewportAndroid.java

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 package org.chromium.mojo;
   6
   7 import android.app.Activity;
   8 import android.content.Context;
   9 import android.view.MotionEvent;
  10 import android.view.Surface;
  11 import android.view.SurfaceHolder;
  12 import android.view.SurfaceView;
  13
  14 import org.chromium.base.CalledByNative;
  15 import org.chromium.base.JNINamespace;
  16
  17 /**
  18  * Exposes SurfaceView to native code.
  19  */
  20 @JNINamespace("mojo")
  21 public class PlatformViewportAndroid extends SurfaceView {
  22
  23     private long mNativeMojoViewport;
  24     private final SurfaceHolder.Callback mSurfaceCallback;
  25
  26     @SuppressWarnings("unused")
  27     @CalledByNative
  28     public static void createForActivity(Activity activity, long nativeViewport) {
  29         activity.setContentView(new PlatformViewportAndroid(activity, nativeViewport));
  30     }
  31
  32     public PlatformViewportAndroid(Context context, long nativeViewport) {
  33         super(context);
  34
  35         mNativeMojoViewport = nativeViewport;
  36         assert mNativeMojoViewport != 0;
  37
  38         mSurfaceCallback = new SurfaceHolder.Callback() {
  39             @Override
  40             public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
  41                 assert mNativeMojoViewport != 0;
  42                 nativeSurfaceSetSize(mNativeMojoViewport, width, height);
  43             }
  44
  45             @Override
  46             public void surfaceCreated(SurfaceHolder holder) {
  47                 assert mNativeMojoViewport != 0;
  48                 nativeSurfaceCreated(mNativeMojoViewport, holder.getSurface());
  49             }
  50
  51             @Override
  52             public void surfaceDestroyed(SurfaceHolder holder) {
  53                 assert mNativeMojoViewport != 0;
  54                 nativeSurfaceDestroyed(mNativeMojoViewport);
  55             }
  56         };
  57         getHolder().addCallback(mSurfaceCallback);
  58
  59     }
  60
  61     // TODO(abarth): Someone needs to call destroy at some point.
  62     public void destroy() {
  63         getHolder().removeCallback(mSurfaceCallback);
  64         nativeDestroy(mNativeMojoViewport);
  65         mNativeMojoViewport = 0;
  66     }
  67
  68     @Override
  69     public boolean onTouchEvent(MotionEvent event) {
  70         return nativeTouchEvent(mNativeMojoViewport,
  71                                 event.getPointerId(0),
  72                                 event.getAction(),
  73                                 event.getX(), event.getY(),
  74                                 event.getEventTime());
  75     }
  76
  77     private static native void nativeDestroy(long nativePlatformViewportAndroid);
  78     private static native void nativeSurfaceCreated(
  79         long nativePlatformViewportAndroid, Surface surface);
  80     private static native void nativeSurfaceDestroyed(
  81         long nativePlatformViewportAndroid);
  82     private static native void nativeSurfaceSetSize(
  83         long nativePlatformViewportAndroid,
  84         int width, int height);
  85     private static native boolean nativeTouchEvent(
  86         long nativePlatformViewportAndroid,
  87         int pointerId,
  88         int action,
  89         float x, float y,
  90         long timeMs);
  91 };