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Commit 13dbf878 authored by Matthew Ng's avatar Matthew Ng
Browse files

Started code to pipe overview events and info to launcher 

The first event will have navigationbar send its x and y touch events
with no delay (upon vsync) to launcher so that launcher can detect and
animate a drag gesture.

If the user has provisioned setup, the connection between overview to
launcher service will be establish to send any information as a proxy
through binder calls. Connection will be reattached if device switches
between users. Each failure to connect to launcher service will have an
exponential backoff timeout to reconnect.

To implement call Dependency.get(OverviewProxyService.class) and then
getProxy() to get the proxy to pipe events or other information across
to launcher.

Test: manual
Bug: 67957962
Change-Id: I3828474147c37b2c514a682f9124e29a5e142736
parent 1b7c2e9f

packages/SystemUI/res/values/config.xml

+3 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ 
     interface.  This name is in the ComponentName flattened format (package/class)  -->

    <string name="config_statusBarComponent" translatable="false">com.android.systemui.statusbar.phone.StatusBar</string>



    <!-- Component name of launcher service for overview to connect to -->

    <string name="config_overviewServiceComponent" translateable="false">com.android.launcher3/com.android.quickstep.TouchInteractionService</string>



    <!-- Whether or not we show the number in the bar. -->

    <bool name="config_statusBarShowNumber">false</bool>

packages/SystemUI/shared/Android.mk

+1 −1
Original line number Diff line number Diff line
@@ -21,7 +21,7 @@ LOCAL_MODULE_TAGS := optional 


LOCAL_MODULE := SystemUISharedLib



LOCAL_SRC_FILES := $(call all-java-files-under, src)

LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-Iaidl-files-under, src)



LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res

LOCAL_JAR_EXCLUDE_FILES := none

packages/SystemUI/shared/src/com/android/systemui/shared/recents/model/IOverviewProxy.aidl

0 → 100644
+23 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 The Android Open Source 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 com.android.systemui.shared.recents.model;



import android.view.MotionEvent;



oneway interface IOverviewProxy {

    void onMotionEvent(in MotionEvent event);

}

packages/SystemUI/src/com/android/systemui/Dependency.java

+2 −0
Original line number Diff line number Diff line
@@ -308,6 +308,8 @@ public class Dependency extends SystemUI { 


        mProviders.put(IWindowManager.class, () -> WindowManagerGlobal.getWindowManagerService());



        mProviders.put(OverviewProxyService.class, () -> new OverviewProxyService(mContext));



        // Put all dependencies above here so the factory can override them if it wants.

        SystemUIFactory.getInstance().injectDependencies(mProviders, mContext);

    }

packages/SystemUI/src/com/android/systemui/OverviewProxyService.java

0 → 100644
+130 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 The Android Open Source 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 com.android.systemui;



import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.content.ServiceConnection;

import android.os.Handler;

import android.os.IBinder;

import android.os.RemoteException;

import android.os.UserHandle;

import android.util.Log;

import com.android.systemui.shared.recents.model.IOverviewProxy;

import com.android.systemui.statusbar.policy.DeviceProvisionedController;

import com.android.systemui.statusbar.policy.DeviceProvisionedController.DeviceProvisionedListener;



/**

 * Class to send information from overview to launcher with a binder.

 */

public class OverviewProxyService {



    private static final String TAG = "OverviewProxyService";

    private static final long BACKOFF_MILLIS = 5000;



    private final Context mContext;

    private final Handler mHandler;

    private final Runnable mConnectionRunnable = this::startConnectionToCurrentUser;

    private final DeviceProvisionedController mDeviceProvisionedController

            = Dependency.get(DeviceProvisionedController.class);



    private IOverviewProxy mOverviewProxy;

    private int mConnectionBackoffAttempts;



    private final ServiceConnection mOverviewServiceConnection = new ServiceConnection() {

        @Override

        public void onServiceConnected(ComponentName name, IBinder service) {

            if (service != null) {

                mConnectionBackoffAttempts = 0;

                mOverviewProxy = IOverviewProxy.Stub.asInterface(service);

                // Listen for launcher's death

                try {

                    service.linkToDeath(mOverviewServiceDeathRcpt, 0);

                } catch (RemoteException e) {

                    Log.e(TAG, "Lost connection to launcher service", e);

                }

            }

        }



        @Override

        public void onServiceDisconnected(ComponentName name) {

            // Do nothing

        }

    };



    private final DeviceProvisionedListener mDeviceProvisionedCallback =

                new DeviceProvisionedListener() {

            @Override

            public void onDeviceProvisionedChanged() {

                if (mDeviceProvisionedController.isCurrentUserSetup()) {

                    startConnectionToCurrentUser();

                }

            }



            @Override

            public void onUserSwitched() {

                disconnectFromLauncherService();

                mConnectionBackoffAttempts = 0;

                startConnectionToCurrentUser();

            }

        };



    // This is the death handler for the binder from the launcher service

    private final IBinder.DeathRecipient mOverviewServiceDeathRcpt = new IBinder.DeathRecipient() {

        @Override

        public void binderDied() {

            mOverviewProxy = null;

        }

    };



    public OverviewProxyService(Context context) {

        mContext = context;

        mHandler = new Handler();

        mConnectionBackoffAttempts = 0;

        mDeviceProvisionedController.addCallback(mDeviceProvisionedCallback);

    }



    public void startConnectionToCurrentUser() {

        // If user has not setup yet or already connected, do not try to connect

        if (!mDeviceProvisionedController.isCurrentUserSetup() || mOverviewProxy != null) {

            return;

        }

        mHandler.removeCallbacks(mConnectionRunnable);

        Intent launcherServiceIntent = new Intent();

        launcherServiceIntent.setComponent(ComponentName.unflattenFromString(

                mContext.getString(R.string.config_overviewServiceComponent)));

        boolean bound = mContext.bindServiceAsUser(launcherServiceIntent,

                mOverviewServiceConnection, Context.BIND_AUTO_CREATE,

                UserHandle.getUserHandleForUid(mDeviceProvisionedController.getCurrentUser()));

        if (!bound) {

            // Retry after exponential backoff timeout

            final long timeoutMs = (long) Math.scalb(BACKOFF_MILLIS, mConnectionBackoffAttempts);

            mHandler.postDelayed(mConnectionRunnable, timeoutMs);

            mConnectionBackoffAttempts++;

        }

    }



    public IOverviewProxy getProxy() {

        return mOverviewProxy;

    }



    private void disconnectFromLauncherService() {

        mContext.unbindService(mOverviewServiceConnection);

        mOverviewProxy = null;

    }

}