packages/SystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java

/*
 * Copyright (C) 2015 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.statusbar.car;

import android.app.ActivityManager;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;
import android.sysprop.CarProperties;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;

import com.android.keyguard.KeyguardUpdateMonitor;
import com.android.systemui.BatteryMeterView;
import com.android.systemui.Dependency;
import com.android.systemui.Prefs;
import com.android.systemui.R;
import com.android.systemui.classifier.FalsingLog;
import com.android.systemui.classifier.FalsingManager;
import com.android.systemui.fragments.FragmentHostManager;
import com.android.systemui.recents.Recents;
import com.android.systemui.recents.misc.SysUiTaskStackChangeListener;
import com.android.systemui.shared.system.ActivityManagerWrapper;
import com.android.systemui.statusbar.StatusBarState;
import com.android.systemui.statusbar.car.hvac.HvacController;
import com.android.systemui.statusbar.phone.CollapsedStatusBarFragment;
import com.android.systemui.statusbar.phone.StatusBar;
import com.android.systemui.statusbar.policy.BatteryController;
import com.android.systemui.statusbar.policy.DeviceProvisionedController;
import com.android.systemui.statusbar.policy.UserSwitcherController;

import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.util.Map;
/**
 * A status bar (and navigation bar) tailored for the automotive use case.
 */
public class CarStatusBar extends StatusBar implements
        CarBatteryController.BatteryViewHandler {
    private static final String TAG = "CarStatusBar";
    public static final boolean ENABLE_HVAC_CONNECTION
            = !CarProperties.hvac_demo().orElse(true);

    private TaskStackListenerImpl mTaskStackListener;

    private FullscreenUserSwitcher mFullscreenUserSwitcher;

    private CarBatteryController mCarBatteryController;
    private BatteryMeterView mBatteryMeterView;
    private Drawable mNotificationPanelBackground;

    private ConnectedDeviceSignalController mConnectedDeviceSignalController;
    private ViewGroup mNavigationBarWindow;
    private ViewGroup mLeftNavigationBarWindow;
    private ViewGroup mRightNavigationBarWindow;
    private CarNavigationBarView mNavigationBarView;
    private CarNavigationBarView mLeftNavigationBarView;
    private CarNavigationBarView mRightNavigationBarView;

    private final Object mQueueLock = new Object();
    private boolean mShowLeft;
    private boolean mShowRight;
    private boolean mShowBottom;
    private CarFacetButtonController mCarFacetButtonController;
    private ActivityManagerWrapper mActivityManagerWrapper;
    private DeviceProvisionedController mDeviceProvisionedController;
    private boolean mDeviceIsProvisioned = true;

    @Override
    public void start() {
        super.start();
        mTaskStackListener = new TaskStackListenerImpl();
        mActivityManagerWrapper = ActivityManagerWrapper.getInstance();
        mActivityManagerWrapper.registerTaskStackListener(mTaskStackListener);

        mStackScroller.setScrollingEnabled(true);

        createBatteryController();
        mCarBatteryController.startListening();

        if (ENABLE_HVAC_CONNECTION) {
            Log.d(TAG, "Connecting to HVAC service");
            Dependency.get(HvacController.class).connectToCarService();
        }
        mCarFacetButtonController = Dependency.get(CarFacetButtonController.class);
        mDeviceProvisionedController = Dependency.get(DeviceProvisionedController.class);
        mDeviceIsProvisioned = mDeviceProvisionedController.isDeviceProvisioned();
        if (!mDeviceIsProvisioned) {
            mDeviceProvisionedController.addCallback(
                    new DeviceProvisionedController.DeviceProvisionedListener() {
                        @Override
                        public void onDeviceProvisionedChanged() {
                            mDeviceIsProvisioned =
                                    mDeviceProvisionedController.isDeviceProvisioned();
                            restartNavBars();
                        }
                    });
        }
    }

    /**
     * Remove all content from navbars and rebuild them. Used to allow for different nav bars
     * before and after the device is provisioned
     */
    private void restartNavBars() {
        mCarFacetButtonController.removeAll();
        if (ENABLE_HVAC_CONNECTION) {
            Dependency.get(HvacController.class).removeAllComponents();
        }
        if (mNavigationBarWindow != null) {
            mNavigationBarWindow.removeAllViews();
            mNavigationBarView = null;
        }

        if (mLeftNavigationBarWindow != null) {
            mLeftNavigationBarWindow.removeAllViews();
            mLeftNavigationBarView = null;
        }

        if (mRightNavigationBarWindow != null) {
            mRightNavigationBarWindow.removeAllViews();
            mRightNavigationBarView = null;
        }
        buildNavBarContent();
    }

    /**
     * Allows for showing or hiding just the navigation bars. This is indented to be used when
     * the full screen user selector is shown.
     */
     void setNavBarVisibility(@View.Visibility int visibility) {
        if (mNavigationBarWindow != null) {
            mNavigationBarWindow.setVisibility(visibility);
        }
        if (mLeftNavigationBarWindow != null) {
            mLeftNavigationBarWindow.setVisibility(visibility);
        }
        if (mRightNavigationBarWindow != null) {
            mRightNavigationBarWindow.setVisibility(visibility);
        }
    }


    @Override
    public boolean hideKeyguard() {
        boolean result = super.hideKeyguard();
        if (mNavigationBarView != null) {
            mNavigationBarView.hideKeyguardButtons();
        }
        if (mLeftNavigationBarView != null) {
            mLeftNavigationBarView.hideKeyguardButtons();
        }
        if (mRightNavigationBarView != null) {
            mRightNavigationBarView.hideKeyguardButtons();
        }
        return result;
    }


    @Override
    public void showKeyguard() {
        super.showKeyguard();
        if (mNavigationBarView != null) {
            mNavigationBarView.showKeyguardButtons();
        }
        if (mLeftNavigationBarView != null) {
            mLeftNavigationBarView.showKeyguardButtons();
        }
        if (mRightNavigationBarView != null) {
            mRightNavigationBarView.showKeyguardButtons();
        }
    }

    @Override
    public void destroy() {
        mCarBatteryController.stopListening();
        mConnectedDeviceSignalController.stopListening();
        mActivityManagerWrapper.unregisterTaskStackListener(mTaskStackListener);

        if (mNavigationBarWindow != null) {
            mWindowManager.removeViewImmediate(mNavigationBarWindow);
            mNavigationBarView = null;
        }

        if (mLeftNavigationBarWindow != null) {
            mWindowManager.removeViewImmediate(mLeftNavigationBarWindow);
            mLeftNavigationBarView = null;
        }

        if (mRightNavigationBarWindow != null) {
            mWindowManager.removeViewImmediate(mRightNavigationBarWindow);
            mRightNavigationBarView = null;
        }
        super.destroy();
    }


    @Override
    protected void makeStatusBarView() {
        super.makeStatusBarView();

        mNotificationPanelBackground = getDefaultWallpaper();
        mScrimController.setScrimBehindDrawable(mNotificationPanelBackground);

        FragmentHostManager manager = FragmentHostManager.get(mStatusBarWindow);
        manager.addTagListener(CollapsedStatusBarFragment.TAG, (tag, fragment) -> {
            mBatteryMeterView = fragment.getView().findViewById(R.id.battery);

            // By default, the BatteryMeterView should not be visible. It will be toggled
            // when a device has connected by bluetooth.
            mBatteryMeterView.setVisibility(View.GONE);
        });
    }

    private BatteryController createBatteryController() {
        mCarBatteryController = new CarBatteryController(mContext);
        mCarBatteryController.addBatteryViewHandler(this);
        return mCarBatteryController;
    }

    @Override
    protected void createNavigationBar() {
        mShowBottom = mContext.getResources().getBoolean(R.bool.config_enableBottomNavigationBar);
        mShowLeft = mContext.getResources().getBoolean(R.bool.config_enableLeftNavigationBar);
        mShowRight = mContext.getResources().getBoolean(R.bool.config_enableRightNavigationBar);

        buildNavBarWindows();
        buildNavBarContent();
        attachNavBarWindows();
    }

    private void buildNavBarContent() {
        if (mShowBottom) {
            buildBottomBar((mDeviceIsProvisioned) ? R.layout.car_navigation_bar :
                    R.layout.car_navigation_bar_unprovisioned);
        }

        if (mShowLeft) {
            buildLeft((mDeviceIsProvisioned) ? R.layout.car_left_navigation_bar :
                    R.layout.car_left_navigation_bar_unprovisioned);
        }

        if (mShowRight) {
            buildRight((mDeviceIsProvisioned) ? R.layout.car_right_navigation_bar :
                    R.layout.car_right_navigation_bar_unprovisioned);
        }
    }

    private void buildNavBarWindows() {
        if (mShowBottom) {

             mNavigationBarWindow = (ViewGroup) View.inflate(mContext,
                    R.layout.navigation_bar_window, null);
        }
        if (mShowLeft) {
            mLeftNavigationBarWindow = (ViewGroup) View.inflate(mContext,
                R.layout.navigation_bar_window, null);
        }
        if (mShowRight) {
            mRightNavigationBarWindow = (ViewGroup) View.inflate(mContext,
                    R.layout.navigation_bar_window, null);
        }

    }

    private void attachNavBarWindows() {

        if (mShowBottom) {
            WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
                    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.TYPE_NAVIGATION_BAR,
                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                            | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                            | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                    PixelFormat.TRANSLUCENT);
            lp.setTitle("CarNavigationBar");
            lp.windowAnimations = 0;
            mWindowManager.addView(mNavigationBarWindow, lp);
        }
        if (mShowLeft) {
            int width = mContext.getResources().getDimensionPixelSize(
                    R.dimen.car_left_navigation_bar_width);
            WindowManager.LayoutParams leftlp = new WindowManager.LayoutParams(
                    width, LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL,
                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                            | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                            | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                    PixelFormat.TRANSLUCENT);
            leftlp.setTitle("LeftCarNavigationBar");
            leftlp.windowAnimations = 0;
            leftlp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_IS_SCREEN_DECOR;
            leftlp.gravity = Gravity.LEFT;
            mWindowManager.addView(mLeftNavigationBarWindow, leftlp);
        }
        if (mShowRight) {
            int width = mContext.getResources().getDimensionPixelSize(
                    R.dimen.car_right_navigation_bar_width);
            WindowManager.LayoutParams rightlp = new WindowManager.LayoutParams(
                    width, LayoutParams.MATCH_PARENT,
                    WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL,
                    WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                            | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                            | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                            | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                    PixelFormat.TRANSLUCENT);
            rightlp.setTitle("RightCarNavigationBar");
            rightlp.windowAnimations = 0;
            rightlp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_IS_SCREEN_DECOR;
            rightlp.gravity = Gravity.RIGHT;
            mWindowManager.addView(mRightNavigationBarWindow, rightlp);
        }

    }

    private void buildBottomBar(int layout) {
        // SystemUI requires that the navigation bar view have a parent. Since the regular
        // StatusBar inflates navigation_bar_window as this parent view, use the same view for the
        // CarNavigationBarView.
        View.inflate(mContext, layout, mNavigationBarWindow);
        mNavigationBarView = (CarNavigationBarView) mNavigationBarWindow.getChildAt(0);
        if (mNavigationBarView == null) {
            Log.e(TAG, "CarStatusBar failed inflate for R.layout.car_navigation_bar");
            throw new RuntimeException("Unable to build botom nav bar due to missing layout");
        }
        mNavigationBarView.setStatusBar(this);
    }

    private void buildLeft(int layout) {
        View.inflate(mContext, layout, mLeftNavigationBarWindow);
        mLeftNavigationBarView = (CarNavigationBarView) mLeftNavigationBarWindow.getChildAt(0);
        if (mLeftNavigationBarView == null) {
            Log.e(TAG, "CarStatusBar failed inflate for R.layout.car_navigation_bar");
            throw new RuntimeException("Unable to build left nav bar due to missing layout");
        }
        mLeftNavigationBarView.setStatusBar(this);
    }


    private void buildRight(int layout) {
        View.inflate(mContext, layout, mRightNavigationBarWindow);
        mRightNavigationBarView = (CarNavigationBarView) mRightNavigationBarWindow.getChildAt(0);
        if (mRightNavigationBarView == null) {
            Log.e(TAG, "CarStatusBar failed inflate for R.layout.car_navigation_bar");
            throw new RuntimeException("Unable to build right nav bar due to missing layout");
        }
    }

    @Override
    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        //When executing dump() funciton simultaneously, we need to serialize them
        //to get mStackScroller's position correctly.
        synchronized (mQueueLock) {
            pw.println("  mStackScroller: " + viewInfo(mStackScroller));
            pw.println("  mStackScroller: " + viewInfo(mStackScroller)
                    + " scroll " + mStackScroller.getScrollX()
                    + "," + mStackScroller.getScrollY());
        }

        pw.print("  mTaskStackListener="); pw.println(mTaskStackListener);
        pw.print("  mCarFacetButtonController=");
        pw.println(mCarFacetButtonController);
        pw.print("  mFullscreenUserSwitcher="); pw.println(mFullscreenUserSwitcher);
        pw.print("  mCarBatteryController=");
        pw.println(mCarBatteryController);
        pw.print("  mBatteryMeterView=");
        pw.println(mBatteryMeterView);
        pw.print("  mConnectedDeviceSignalController=");
        pw.println(mConnectedDeviceSignalController);
        pw.print("  mNavigationBarView=");
        pw.println(mNavigationBarView);

        if (KeyguardUpdateMonitor.getInstance(mContext) != null) {
            KeyguardUpdateMonitor.getInstance(mContext).dump(fd, pw, args);
        }

        FalsingManager.getInstance(mContext).dump(pw);
        FalsingLog.dump(pw);

        pw.println("SharedPreferences:");
        for (Map.Entry<String, ?> entry : Prefs.getAll(mContext).entrySet()) {
            pw.print("  "); pw.print(entry.getKey()); pw.print("="); pw.println(entry.getValue());
        }
    }


    @Override
    public View getNavigationBarWindow() {
        return mNavigationBarWindow;
    }

    @Override
    protected View.OnTouchListener getStatusBarWindowTouchListener() {
        // Usually, a touch on the background window will dismiss the notification shade. However,
        // for the car use-case, the shade should remain unless the user switches to a different
        // facet (e.g. phone).
        return null;
    }

    @Override
    public void showBatteryView() {
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "showBatteryView(). mBatteryMeterView: " + mBatteryMeterView);
        }

        if (mBatteryMeterView != null) {
            mBatteryMeterView.setVisibility(View.VISIBLE);
        }
    }

    @Override
    public void hideBatteryView() {
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "hideBatteryView(). mBatteryMeterView: " + mBatteryMeterView);
        }

        if (mBatteryMeterView != null) {
            mBatteryMeterView.setVisibility(View.GONE);
        }
    }


    public boolean hasDockedTask() {
        return Recents.getSystemServices().hasDockedTask();
    }

    /**
     * An implementation of SysUiTaskStackChangeListener, that listens for changes in the system task
     * stack and notifies the navigation bar.
     */
    private class TaskStackListenerImpl extends SysUiTaskStackChangeListener {
        @Override
        public void onTaskStackChanged() {
            try {
                mCarFacetButtonController.taskChanged(
                        ActivityManager.getService().getAllStackInfos());
            } catch (Exception e) {
                Log.e(TAG, "Getting StackInfo from activity manager failed", e);
            }
        }
    }

    @Override
    protected void createUserSwitcher() {
        UserSwitcherController userSwitcherController =
                Dependency.get(UserSwitcherController.class);
        if (userSwitcherController.useFullscreenUserSwitcher()) {
            mFullscreenUserSwitcher = new FullscreenUserSwitcher(this,
                    mStatusBarWindow.findViewById(R.id.fullscreen_user_switcher_stub), mContext);
        } else {
            super.createUserSwitcher();
        }
    }

    @Override
    public void onUserSwitched(int newUserId) {
        super.onUserSwitched(newUserId);
        if (mFullscreenUserSwitcher != null) {
            mFullscreenUserSwitcher.onUserSwitched(newUserId);
        }
    }

    @Override
    public void updateKeyguardState(boolean goingToFullShade, boolean fromShadeLocked) {
        super.updateKeyguardState(goingToFullShade, fromShadeLocked);
        if (mFullscreenUserSwitcher != null) {
            if (mState == StatusBarState.FULLSCREEN_USER_SWITCHER) {
                mFullscreenUserSwitcher.show();
            } else {
                mFullscreenUserSwitcher.hide();
            }
        }
    }

    @Override
    public void updateMediaMetaData(boolean metaDataChanged, boolean allowEnterAnimation) {
        // Do nothing, we don't want to display media art in the lock screen for a car.
    }


    @Override
    public void animateExpandNotificationsPanel() {
        // Because space is usually constrained in the auto use-case, there should not be a
        // pinned notification when the shade has been expanded. Ensure this by removing all heads-
        // up notifications.
        mHeadsUpManager.releaseAllImmediately();
        super.animateExpandNotificationsPanel();
    }

    /**
     * Ensures that relevant child views are appropriately recreated when the device's density
     * changes.
     */
    @Override
    public void onDensityOrFontScaleChanged() {
        super.onDensityOrFontScaleChanged();
        // Need to update the background on density changed in case the change was due to night
        // mode.
        mNotificationPanelBackground = getDefaultWallpaper();
        mScrimController.setScrimBehindDrawable(mNotificationPanelBackground);
    }

    /**
     * Returns the {@link Drawable} that represents the wallpaper that the user has currently set.
     */
    private Drawable getDefaultWallpaper() {
        return mContext.getDrawable(com.android.internal.R.drawable.default_wallpaper);
    }
}