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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 com.android.launcher3.widget;
import android.content.Context;
import android.graphics.Outline;
import android.graphics.Rect;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewOutlineProvider;
import android.widget.RemoteViews;
import androidx.annotation.UiThread;
import com.android.launcher3.R;
import com.android.launcher3.util.Executors;
/**
* Launcher AppWidgetHostView with support for rounded corners and a fallback View.
*/
public abstract class BaseLauncherAppWidgetHostView extends NavigableAppWidgetHostView {
protected final LayoutInflater mInflater;
private final Rect mEnforcedRectangle = new Rect();
private final float mEnforcedCornerRadius;
private final ViewOutlineProvider mCornerRadiusEnforcementOutline = new ViewOutlineProvider() {
@Override
public void getOutline(View view, Outline outline) {
if (mEnforcedRectangle.isEmpty() || mEnforcedCornerRadius <= 0) {
outline.setEmpty();
} else {
outline.setRoundRect(mEnforcedRectangle, mEnforcedCornerRadius);
}
}
};
public BaseLauncherAppWidgetHostView(Context context) {
super(context);
setExecutor(Executors.THREAD_POOL_EXECUTOR);
mInflater = LayoutInflater.from(context);
mEnforcedCornerRadius = RoundedCornerEnforcement.computeEnforcedRadius(getContext());
}
@Override
protected View getErrorView() {
return mInflater.inflate(R.layout.appwidget_error, this, false);
}
/**
* Fall back to error layout instead of showing widget.
*/
public void switchToErrorView() {
// Update the widget with 0 Layout id, to reset the view to error view.
updateAppWidget(new RemoteViews(getAppWidgetInfo().provider.getPackageName(), 0));
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
try {
super.onLayout(changed, left, top, right, bottom);
} catch (final RuntimeException e) {
post(this::switchToErrorView);
}
enforceRoundedCorners();
}
@UiThread
private void resetRoundedCorners() {
setOutlineProvider(ViewOutlineProvider.BACKGROUND);
setClipToOutline(false);
}
@UiThread
private void enforceRoundedCorners() {
if (mEnforcedCornerRadius <= 0 || !RoundedCornerEnforcement.isRoundedCornerEnabled()) {
resetRoundedCorners();
return;
}
View background = RoundedCornerEnforcement.findBackground(this);
if (background == null
|| RoundedCornerEnforcement.hasAppWidgetOptedOut(this, background)) {
resetRoundedCorners();
return;
}
RoundedCornerEnforcement.computeRoundedRectangle(this,
background,
mEnforcedRectangle);
setOutlineProvider(mCornerRadiusEnforcementOutline);
setClipToOutline(true);
}
/** Returns the corner radius currently enforced, in pixels. */
public float getEnforcedCornerRadius() {
return mEnforcedCornerRadius;
}
/** Returns true if the corner radius are enforced for this App Widget. */
public boolean hasEnforcedCornerRadius() {
return getClipToOutline();
}
}
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