Create a new window to host car specific sysui

<?xml version="1.0" encoding="utf-8"?>

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<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:background="@android:color/transparent"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

</FrameLayout>

 No newline at end of file

/*

 * Copyright (C) 2020 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.car;

import static android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;

import android.content.Context;

import android.content.res.Resources;

import android.graphics.PixelFormat;

import android.graphics.Point;

import android.os.Binder;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.ViewGroup;

import android.view.WindowManager;

import com.android.systemui.R;

import com.android.systemui.dagger.qualifiers.Main;

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

import javax.inject.Inject;

import javax.inject.Singleton;

/**

 * Controls the expansion state of the primary window which will contain all of the fullscreen sysui

 * behavior. This window still has a collapsed state in order to watch for swipe events to expand

 * this window for the notification panel.

 */

@Singleton

public class SystemUIPrimaryWindowController implements

        ConfigurationController.ConfigurationListener {

    private final Context mContext;

    private final Resources mResources;

    private final WindowManager mWindowManager;

    private final int mStatusBarHeight;

    private final int mNavBarHeight;

    private final int mDisplayHeight;

    private ViewGroup mBaseLayout;

    private WindowManager.LayoutParams mLp;

    private WindowManager.LayoutParams mLpChanged;

    @Inject

    public SystemUIPrimaryWindowController(

            Context context,

            @Main Resources resources,

            WindowManager windowManager,

            ConfigurationController configurationController

    ) {

        mContext = context;

        mResources = resources;

        mWindowManager = windowManager;

        Point display = new Point();

        mWindowManager.getDefaultDisplay().getSize(display);

        mDisplayHeight = display.y;

        mStatusBarHeight = mResources.getDimensionPixelSize(

                com.android.internal.R.dimen.status_bar_height);

        mNavBarHeight = mResources.getDimensionPixelSize(R.dimen.navigation_bar_height);

        mLpChanged = new WindowManager.LayoutParams();

        mBaseLayout = (ViewGroup) LayoutInflater.from(context)

                .inflate(R.layout.sysui_primary_window, /* root= */ null, false);

        configurationController.addCallback(this);

    }

    /** Returns the base view of the primary window. */

    public ViewGroup getBaseLayout() {

        return mBaseLayout;

    }

    /** Attaches the window to the window manager. */

    public void attach() {

        // Now that the status bar window encompasses the sliding panel and its

        // translucent backdrop, the entire thing is made TRANSLUCENT and is

        // hardware-accelerated.

        mLp = new WindowManager.LayoutParams(

                ViewGroup.LayoutParams.MATCH_PARENT,

                mStatusBarHeight,

                WindowManager.LayoutParams.TYPE_STATUS_BAR_SUB_PANEL,

                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

                        | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH

                        | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH

                        | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,

                PixelFormat.TRANSLUCENT);

        mLp.token = new Binder();

        mLp.gravity = Gravity.TOP;

        mLp.setFitWindowInsetsTypes(/* types= */ 0);

        mLp.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE;

        mLp.setTitle("NotificationShade");

        mLp.packageName = mContext.getPackageName();

        mLp.layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;

        mWindowManager.addView(mBaseLayout, mLp);

        mLpChanged.copyFrom(mLp);

    }

    /** Sets the window to the expanded state. */

    public void setWindowExpanded(boolean expanded) {

        if (expanded) {

            // TODO: Update this so that the windowing type gets the full height of the display

            //  when we use MATCH_PARENT.

            mLpChanged.height = mDisplayHeight + mNavBarHeight;

        } else {

            mLpChanged.height = mStatusBarHeight;

        }

        updateWindow();

    }

    /** Returns {@code true} if the window is expanded */

    public boolean isWindowExpanded() {

        return mLp.height != mStatusBarHeight;

    }

    private void updateWindow() {

        if (mLp != null && mLp.copyFrom(mLpChanged) != 0) {

            mWindowManager.updateViewLayout(mBaseLayout, mLp);

        }

    }

}