80 lines
2.1 KiB
JavaScript
80 lines
2.1 KiB
JavaScript
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/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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/**
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* Escape Unicode Characters operation
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*/
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class EscapeUnicodeCharacters extends Operation {
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/**
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* EscapeUnicodeCharacters constructor
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*/
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constructor() {
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super();
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this.name = "Escape Unicode Characters";
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this.module = "Default";
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this.description = "Converts characters to their unicode-escaped notations.<br><br>Supports the prefixes:<ul><li><code>\\u</code></li><li><code>%u</code></li><li><code>U+</code></li></ul>e.g. <code>σου</code> becomes <code>\\u03C3\\u03BF\\u03C5</code>";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Prefix",
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"type": "option",
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"value": ["\\u", "%u", "U+"]
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},
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{
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"name": "Encode all chars",
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"type": "boolean",
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"value": false
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},
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{
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"name": "Padding",
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"type": "number",
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"value": 4
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},
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{
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"name": "Uppercase hex",
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"type": "boolean",
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"value": true
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}
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const regexWhitelist = /[ -~]/i,
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[prefix, encodeAll, padding, uppercaseHex] = args;
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let output = "",
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character = "";
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for (let i = 0; i < input.length; i++) {
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character = input[i];
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if (!encodeAll && regexWhitelist.test(character)) {
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// It’s a printable ASCII character so don’t escape it.
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output += character;
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continue;
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}
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let cp = character.codePointAt(0).toString(16);
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if (uppercaseHex) cp = cp.toUpperCase();
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output += prefix + cp.padStart(padding, "0");
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}
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return output;
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}
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}
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export default EscapeUnicodeCharacters;
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