com.gargoylesoftware.htmlunit.javascript.host.TextEncoder Maven / Gradle / Ivy

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A headless browser intended for use in testing web-based applications.
There is a newer version: 2.70.0
/*
 * Copyright (c) 2002-2022 Gargoyle Software Inc.
 *
 * 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
 * https://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.gargoylesoftware.htmlunit.javascript.host;

import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.CHROME;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.EDGE;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.FF;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.FF_ESR;

import java.nio.charset.StandardCharsets;

import com.gargoylesoftware.htmlunit.javascript.HtmlUnitScriptable;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxClass;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxConstructor;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxFunction;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxGetter;

import net.sourceforge.htmlunit.corejs.javascript.Context;
import net.sourceforge.htmlunit.corejs.javascript.ScriptableObject;
import net.sourceforge.htmlunit.corejs.javascript.Undefined;
import net.sourceforge.htmlunit.corejs.javascript.typedarrays.NativeArrayBuffer;
import net.sourceforge.htmlunit.corejs.javascript.typedarrays.NativeUint8Array;

/**
 * A JavaScript object for {@code TextEncoder}.
 *
 * @author Ahmed Ashour
 * @author Ronald Brill
 */
@JsxClass({CHROME, EDGE, FF, FF_ESR})
public class TextEncoder extends HtmlUnitScriptable {

    /**
     * Creates an instance.
     */
    @JsxConstructor
    public TextEncoder() {
    }

    /**
     * @return always "utf-8"
     */
    @JsxGetter
    public String getEncoding() {
        return "utf-8";
    }

    /**
     * @param toEncode the string to encode
     * @return returns a Uint8Array containing the text given encoded .
     */
    @JsxFunction
    public NativeUint8Array encode(final Object toEncode) {
        if (Undefined.isUndefined(toEncode)) {
            final NativeUint8Array result = new NativeUint8Array(0);
            result.setParentScope(getParentScope());
            result.setPrototype(ScriptableObject.getClassPrototype(getWindow(this), result.getClassName()));
            return result;
        }

        final String txt;
        if (toEncode == null) {
            txt = "null";
        }
        else {
            txt = Context.toString(toEncode);
        }

        final byte[] bytes = txt.getBytes(StandardCharsets.UTF_8);

        final NativeArrayBuffer arrayBuffer = new NativeArrayBuffer(bytes.length);
        System.arraycopy(bytes, 0, arrayBuffer.getBuffer(), 0, bytes.length);

        final NativeUint8Array result = new NativeUint8Array(arrayBuffer, 0, bytes.length);
        result.setParentScope(getParentScope());
        result.setPrototype(ScriptableObject.getClassPrototype(getWindow(this), result.getClassName()));
        return result;
    }
}