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/*
* Copyright (C) 2015 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cyanogenmod.externalviews;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import com.android.internal.policy.PhoneWindow;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
/**
* TODO: unhide once documented and finalized
* @hide
*/
public abstract class ExternalViewProviderService extends Service {
private static final String TAG = "ExternalViewProvider";
private static final boolean DEBUG = false;
private WindowManager mWindowManager;
private final Handler mHandler = new Handler();
@Override
public void onCreate() {
super.onCreate();
mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
}
@Override
public final IBinder onBind(Intent intent) {
return new IExternalViewProviderFactory.Stub() {
@Override public IBinder createExternalView(final Bundle options) {
FutureTask<IBinder> c = new FutureTask<IBinder>(new Callable<IBinder>() {
@Override
public IBinder call() throws Exception {
return ExternalViewProviderService.this.createExternalView(options).mImpl;
}
});
mHandler.post(c);
try {
return c.get();
} catch (InterruptedException | ExecutionException e) {
Log.e(TAG, "error: ", e);
return null;
}
}
};
}
protected abstract Provider createExternalView(Bundle options);
protected abstract class Provider {
public static final int DEFAULT_WINDOW_TYPE = WindowManager.LayoutParams.TYPE_PHONE;
public static final int DEFAULT_WINDOW_FLAGS =
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS |
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;;
private final class ProviderImpl extends IExternalViewProvider.Stub {
private final Window mWindow;
private final WindowManager.LayoutParams mParams;
private boolean mShouldShow = true;
private boolean mAskedShow = false;
public ProviderImpl(Provider provider) {
mWindow = new PhoneWindow(ExternalViewProviderService.this);
((ViewGroup) mWindow.getDecorView()).addView(onCreateView());
mParams = new WindowManager.LayoutParams();
mParams.type = provider.getWindowType();
mParams.flags = provider.getWindowFlags();
mParams.gravity = Gravity.LEFT | Gravity.TOP;
mParams.format = PixelFormat.TRANSPARENT;
}
@Override
public void onAttach(IBinder windowToken) throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
mWindowManager.addView(mWindow.getDecorView(), mParams);
Provider.this.onAttach();
}
});
}
@Override
public void onStart() throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
Provider.this.onStart();
}
});
}
@Override
public void onResume() throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
mShouldShow = true;
updateVisibility();
Provider.this.onResume();
}
});
}
@Override
public void onPause() throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
mShouldShow = false;
updateVisibility();
Provider.this.onPause();
}
});
}
@Override
public void onStop() throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
Provider.this.onStop();
}
});
}
@Override
public void onDetach() throws RemoteException {
mHandler.post(new Runnable() {
@Override
public void run() {
mWindowManager.removeView(mWindow.getDecorView());
Provider.this.onDetach();
}
});
}
@Override
public void alterWindow(final int x, final int y, final int width, final int height,
final boolean visible, final Rect clipRect) {
mHandler.post(new Runnable() {
@Override
public void run() {
mParams.x = x;
mParams.y = y;
mParams.width = width;
mParams.height = height;
if (DEBUG) Log.d(TAG, mParams.toString());
mAskedShow = visible;
updateVisibility();
View decorView = mWindow.getDecorView();
if (decorView.getVisibility() == View.VISIBLE) {
decorView.setClipBounds(clipRect);
}
if (mWindow.getDecorView().getVisibility() != View.GONE)
mWindowManager.updateViewLayout(mWindow.getDecorView(), mParams);
}
});
}
private void updateVisibility() {
if (DEBUG) Log.d(TAG, "shouldShow = " + mShouldShow + " askedShow = " + mAskedShow);
mWindow.getDecorView().setVisibility(mShouldShow && mAskedShow ?
View.VISIBLE : View.GONE);
}
}
private final ProviderImpl mImpl = new ProviderImpl(this);
private final Bundle mOptions;
protected Provider(Bundle options) {
mOptions = options;
}
protected Bundle getOptions() {
return mOptions;
}
protected void onAttach() {}
protected abstract View onCreateView();
protected void onStart() {}
protected void onResume() {}
protected void onPause() {}
protected void onStop() {}
protected void onDetach() {}
/*package*/ int getWindowType() {
return DEFAULT_WINDOW_TYPE;
}
/*package*/ int getWindowFlags() {
return DEFAULT_WINDOW_FLAGS;
}
}
}
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