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100 lines
2.4 KiB
TypeScript
100 lines
2.4 KiB
TypeScript
/**
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* @license
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* Copyright 2018 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* XML element manipulation.
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* These methods are not specific to Blockly, and could be factored out into
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* a JavaScript framework such as Closure.
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*
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* @namespace Blockly.utils.xml
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*/
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import * as goog from '../../closure/goog/goog.js';
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goog.declareModuleId('Blockly.utils.xml');
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/**
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* Namespace for Blockly's XML.
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*
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* @alias Blockly.utils.xml.NAME_SPACE
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*/
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export const NAME_SPACE = 'https://developers.google.com/blockly/xml';
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/**
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* The Document object to use. By default this is just document, but
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* the Node.js build of Blockly (see scripts/package/node/core.js)
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* calls setDocument to supply a Document implementation from the
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* jsdom package instead.
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*/
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let xmlDocument: Document = globalThis['document'];
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/**
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* Get the document object to use for XML serialization.
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*
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* @returns The document object.
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* @alias Blockly.utils.xml.getDocument
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*/
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export function getDocument(): Document {
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return xmlDocument;
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}
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/**
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* Get the document object to use for XML serialization.
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*
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* @param document The document object to use.
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* @alias Blockly.utils.xml.setDocument
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*/
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export function setDocument(document: Document) {
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xmlDocument = document;
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}
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/**
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* Create DOM element for XML.
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*
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* @param tagName Name of DOM element.
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* @returns New DOM element.
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* @alias Blockly.utils.xml.createElement
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*/
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export function createElement(tagName: string): Element {
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return xmlDocument.createElementNS(NAME_SPACE, tagName);
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}
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/**
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* Create text element for XML.
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*
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* @param text Text content.
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* @returns New DOM text node.
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* @alias Blockly.utils.xml.createTextNode
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*/
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export function createTextNode(text: string): Text {
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return xmlDocument.createTextNode(text);
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}
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/**
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* Converts an XML string into a DOM tree.
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*
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* @param text XML string.
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* @returns The DOM document.
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* @throws if XML doesn't parse.
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* @alias Blockly.utils.xml.textToDomDocument
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*/
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export function textToDomDocument(text: string): Document {
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const oParser = new DOMParser();
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return oParser.parseFromString(text, 'text/xml');
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}
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/**
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* Converts a DOM structure into plain text.
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* Currently the text format is fairly ugly: all one line with no whitespace.
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*
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* @param dom A tree of XML nodes.
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* @returns Text representation.
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* @alias Blockly.utils.xml.domToText
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*/
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export function domToText(dom: Node): string {
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const oSerializer = new XMLSerializer();
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return oSerializer.serializeToString(dom);
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}
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