ESM: Ported case converters, generic beautifier and syntax highlighting

src/core/operations/SyntaxHighlighter.mjs

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+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import hljs from "highlight.js";
+
+/**
+ * Syntax highlighter operation
+ */
+class SyntaxHighlighter extends Operation {
+
+    /**
+     * SyntaxHighlighter constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Syntax highlighter";
+        this.module = "Code";
+        this.description = "Adds syntax highlighting to a range of source code languages. Note that this will not indent the code. Use one of the 'Beautify' operations for that.";
+        this.inputType = "string";
+        this.outputType = "html";
+        this.args = [
+            {
+                "name": "Language",
+                "type": "option",
+                "value": ["auto detect"].concat(hljs.listLanguages())
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {html}
+     */
+    run(input, args) {
+        const language = args[0];
+
+        if (language === "auto detect") {
+            return hljs.highlightAuto(input).value;
+        }
+
+        return hljs.highlight(language, input, true).value;
+    }
+
+    /**
+     * Highlight Syntax highlighter
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlight(pos, args) {
+        return pos;
+    }
+
+    /**
+     * Highlight Syntax highlighter in reverse
+     *
+     * @param {Object[]} pos
+     * @param {number} pos[].start
+     * @param {number} pos[].end
+     * @param {Object[]} args
+     * @returns {Object[]} pos
+     */
+    highlightReverse(pos, args) {
+        return pos;
+    }
+
+}
+
+export default SyntaxHighlighter;