@doodad-js/xml/browserify/server/Tools_Xml_Parsers_Libxml2_Loader.js

XML Parser

// Copyright 2015-2018 Claude Petit, licensed under Apache License version 2.0

	"use strict";

exports.add = function add(modules) {
	modules = (modules || {});
	modules['Doodad.Tools.Xml.Parsers.Libxml2.Loader'] = {
		version: '5.2.0b',
		dependencies: [
			'Doodad.Tools.Xml',
		],

		create: function create(root, /*optional*/_options) {
			//===================================
			// Get namespaces
			//===================================

			const doodad = root.Doodad,
				//types = doodad.Types,
				tools = doodad.Tools,
				modules = doodad.Modules,
				xml = tools.Xml,
				xmlParsers = xml.Parsers,
				libxml2 = xmlParsers.Libxml2,
				libxml2Loader = libxml2.Loader;

			//===================================
			// Internal
			//===================================

			// <FUTURE> Thread context
			const __Internal__ = {
				libxml2: null,
			};

			//===================================
			// libxml2 Parser
			//===================================

			// NOTE: libxml2 is optional
			libxml2Loader.ADD('get', root.DD_DOC(
									{
						author: "Claude Petit",
						revision: 0,
						params: null,
						returns: 'object',
						description: "Returns parser from the libxml2 library when available. Otherwise, returns 'null'.",
					}
								, function get() {
					return __Internal__.libxml2;
				}));


			//===================================
			// Init
			//===================================
			return function init(/*optional*/options) {
				// <PRB> Emscripten calls "process.exit" on "unhandledRejection" !!!
				const unhandledListeners = process.listeners('unhandledRejection');
				const handledListeners = process.listeners('rejectionHandled');

				return modules.import('@doodad-js/xml/lib/libxml2/libxml2.js')
					.then(function(exports) {
						process.listeners('unhandledRejection').forEach(function(listener) {
							if (tools.indexOf(unhandledListeners, listener) < 0) {
								process.removeListener('unhandledRejection', listener);
							};
						});
						process.listeners('rejectionHandled').forEach(function(listener) {
							if (tools.indexOf(handledListeners, listener) < 0) {
								process.removeListener('rejectionHandled', listener);
							};
						});

						__Internal__.libxml2 = exports.default;
					})
					.catch(function(err) {
						// Do nothing
					});
			};
		},
	};
	return modules;
};