androidx/webkit/WebViewFeature.java

/*
 * Copyright 2018 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.webkit;

import androidx.annotation.NonNull;
import androidx.annotation.RestrictTo;
import androidx.annotation.StringDef;
import androidx.webkit.internal.WebViewFeatureInternal;

import org.chromium.support_lib_boundary.util.Features;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Utility class for checking which WebView Support Library features are supported on the device.
 */
public class WebViewFeature {

    private WebViewFeature() {}

    /**
     * @hide
     */
    @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
    @StringDef(value = {
            VISUAL_STATE_CALLBACK,
    })
    @Retention(RetentionPolicy.SOURCE)
    @Target({ElementType.PARAMETER, ElementType.METHOD})
    public @interface WebViewSupportFeature {}

    /**
     * Feature for {@link #isFeatureSupported(String)}.
     * This feature covers
     * {@link androidx.webkit.WebViewCompat#postVisualStateCallback(android.webkit.WebView, long,
     * WebViewCompat.VisualStateCallback)}.
     */
    public static final String VISUAL_STATE_CALLBACK = Features.VISUAL_STATE_CALLBACK;

    /**
     * Return whether a feature is supported at run-time. This depends on the Android version of the
     * device and the WebView APK on the device.
     */
    public static boolean isFeatureSupported(@NonNull @WebViewSupportFeature String feature) {
        WebViewFeatureInternal webviewFeature = WebViewFeatureInternal.getFeature(feature);
        return webviewFeature.isSupportedByFramework() || webviewFeature.isSupportedByWebView();
    }
}