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/*
* 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.Context;
import android.database.ContentObserver;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.Region;
import android.os.Handler;
import android.os.Looper;
import android.os.UserHandle;
import android.provider.Settings;
import android.view.DisplayCutout;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowInsets;
import android.view.WindowManager;
import java.util.Collections;
import java.util.List;
/**
* Emulates a display cutout by drawing its shape in an overlay as supplied by
* {@link DisplayCutout}.
*/
public class EmulatedDisplayCutout extends SystemUI {
private View mOverlay;
private boolean mAttached;
private WindowManager mWindowManager;
@Override
public void start() {
mWindowManager = mContext.getSystemService(WindowManager.class);
mContext.getContentResolver().registerContentObserver(
Settings.Global.getUriFor(Settings.Global.EMULATE_DISPLAY_CUTOUT),
false, mObserver, UserHandle.USER_ALL);
mObserver.onChange(false);
}
private void setAttached(boolean attached) {
if (attached && !mAttached) {
if (mOverlay == null) {
mOverlay = new CutoutView(mContext);
mOverlay.setLayoutParams(getLayoutParams());
}
mWindowManager.addView(mOverlay, mOverlay.getLayoutParams());
mAttached = true;
} else if (!attached && mAttached) {
mWindowManager.removeView(mOverlay);
mAttached = false;
}
}
private WindowManager.LayoutParams getLayoutParams() {
final WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL,
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
| WindowManager.LayoutParams.FLAG_SPLIT_TOUCH
| WindowManager.LayoutParams.FLAG_SLIPPERY
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
| WindowManager.LayoutParams.FLAG_LAYOUT_INSET_DECOR,
PixelFormat.TRANSLUCENT);
lp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_SHOW_FOR_ALL_USERS
| WindowManager.LayoutParams.PRIVATE_FLAG_IS_ROUNDED_CORNERS_OVERLAY;
lp.flags2 |= WindowManager.LayoutParams.FLAG2_LAYOUT_IN_DISPLAY_CUTOUT_AREA;
lp.setTitle("EmulatedDisplayCutout");
lp.gravity = Gravity.TOP;
return lp;
}
private ContentObserver mObserver = new ContentObserver(new Handler(Looper.getMainLooper())) {
@Override
public void onChange(boolean selfChange) {
boolean emulateCutout = Settings.Global.getInt(
mContext.getContentResolver(), Settings.Global.EMULATE_DISPLAY_CUTOUT,
Settings.Global.EMULATE_DISPLAY_CUTOUT_OFF)
!= Settings.Global.EMULATE_DISPLAY_CUTOUT_OFF;
setAttached(emulateCutout);
}
};
private static class CutoutView extends View {
private final Paint mPaint = new Paint();
private final Path mBounds = new Path();
CutoutView(Context context) {
super(context);
}
@Override
public WindowInsets onApplyWindowInsets(WindowInsets insets) {
if (insets.getDisplayCutout() != null) {
insets.getDisplayCutout().getBounds().getBoundaryPath(mBounds);
} else {
mBounds.reset();
}
invalidate();
return insets.consumeDisplayCutout();
}
@Override
protected void onDraw(Canvas canvas) {
if (!mBounds.isEmpty()) {
mPaint.setColor(Color.DKGRAY);
mPaint.setStyle(Paint.Style.FILL);
canvas.drawPath(mBounds, mPaint);
}
}
}
}
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