HtmlUtils.java
/*
* 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 androidx.media3.ui;
import android.graphics.Color;
import androidx.annotation.ColorInt;
import androidx.media3.common.util.Util;
/**
* Utility methods for generating HTML and CSS for use with {@link WebViewSubtitleOutput} and {@link
* SpannedToHtmlConverter}.
*/
/* package */ final class HtmlUtils {
private HtmlUtils() {}
public static String toCssRgba(@ColorInt int color) {
return Util.formatInvariant(
"rgba(%d,%d,%d,%.3f)",
Color.red(color), Color.green(color), Color.blue(color), Color.alpha(color) / 255.0);
}
/**
* Returns a CSS selector that selects all elements with {@code class=className} and all their
* descendants.
*/
public static String cssAllClassDescendantsSelector(String className) {
return "." + className + ",." + className + " *";
}
}