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/*
* Copyright (C) 2021 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 android.inputmethodservice;
import static android.view.WindowManager.LayoutParams;
import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
import static android.view.WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
import android.annotation.NonNull;
import android.content.Context;
import android.os.IBinder;
import android.util.Slog;
import android.view.View;
import android.view.WindowManager;
import com.android.internal.policy.PhoneWindow;
/**
* Window of type {@code LayoutParams.TYPE_INPUT_METHOD_DIALOG} for drawing
* Handwriting Ink on screen.
* @hide
*/
final class InkWindow extends PhoneWindow {
private final WindowManager mWindowManager;
private boolean mIsViewAdded;
public InkWindow(@NonNull Context context) {
super(context);
setType(LayoutParams.TYPE_INPUT_METHOD);
final LayoutParams attrs = getAttributes();
attrs.layoutInDisplayCutoutMode = LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
attrs.setFitInsetsTypes(0);
// TODO(b/210039666): use INPUT_FEATURE_NO_INPUT_CHANNEL once b/216179339 is fixed.
setAttributes(attrs);
// Ink window is not touchable with finger.
addFlags(FLAG_LAYOUT_IN_SCREEN | FLAG_LAYOUT_NO_LIMITS | FLAG_NOT_TOUCHABLE
| FLAG_NOT_FOCUSABLE);
setBackgroundDrawableResource(android.R.color.transparent);
setLayout(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
mWindowManager = context.getSystemService(WindowManager.class);
}
/**
* Initialize InkWindow if we only want to create and draw surface but not show it.
*/
void initOnly() {
show(true /* keepInvisible */);
}
/**
* Method to show InkWindow on screen.
* Emulates internal behavior similar to Dialog.show().
*/
void show() {
show(false /* keepInvisible */);
}
private void show(boolean keepInvisible) {
if (getDecorView() == null) {
Slog.i(InputMethodService.TAG, "DecorView is not set for InkWindow. show() failed.");
return;
}
getDecorView().setVisibility(keepInvisible ? View.INVISIBLE : View.VISIBLE);
if (!mIsViewAdded) {
mWindowManager.addView(getDecorView(), getAttributes());
mIsViewAdded = true;
}
}
/**
* Method to hide InkWindow from screen.
* Emulates internal behavior similar to Dialog.hide().
* @param remove set {@code true} to remove InkWindow surface completely.
*/
void hide(boolean remove) {
if (getDecorView() != null) {
getDecorView().setVisibility(remove ? View.GONE : View.INVISIBLE);
}
//TODO(b/210039666): remove window from WM after a delay. Delay amount TBD.
}
void setToken(@NonNull IBinder token) {
WindowManager.LayoutParams lp = getAttributes();
lp.token = token;
setAttributes(lp);
}
}
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