Class TemplateParser

packages/core/ui/builder/index.ts:498–586

	}

	export class TemplateParser implements XmlStateConsumer {
		private _context: any;
		private _recordedXmlStream: Array<xml.ParserEvent>;
		private _templateProperty: TemplateProperty;
		private _nestingLevel: number;
		private _state: TemplateParser.State;

		private parent: XmlStateConsumer;
		private _setTemplateProperty: boolean;

		constructor(parent: XmlStateConsumer, templateProperty: TemplateProperty, setTemplateProperty = true) {
			this.parent = parent;
			this._context = templateProperty.context;
			this._recordedXmlStream = new Array<xml.ParserEvent>();
			this._templateProperty = templateProperty;
			this._nestingLevel = 0;
			this._state = TemplateParser.State.EXPECTING_START;
			this._setTemplateProperty = setTemplateProperty;
		}

		public parse(args: xml.ParserEvent): XmlStateConsumer {
			if (args.eventType === xml.ParserEventType.StartElement) {
				this.parseStartElement(args.prefix, args.namespace, args.elementName, args.attributes);
			} else if (args.eventType === xml.ParserEventType.EndElement) {
				this.parseEndElement(args.prefix, args.elementName);
			}

			this._recordedXmlStream.push(args);

			return this._state === TemplateParser.State.FINISHED ? this.parent : this;
		}

		public get elementName(): string {
			return this._templateProperty.elementName;
		}

		private parseStartElement(prefix: string, namespace: string, elementName: string, attributes: Object) {
			if (this._state === TemplateParser.State.EXPECTING_START) {
				this._state = TemplateParser.State.PARSING;
			} else if (this._state === TemplateParser.State.FINISHED) {
				throw new Error('Template must have exactly one root element but multiple elements were found.');
			}

			this._nestingLevel++;
		}

		private parseEndElement(prefix: string, elementName: string) {
			if (this._state === TemplateParser.State.EXPECTING_START) {
				throw new Error('Template must have exactly one root element but none was found.');
			} else if (this._state === TemplateParser.State.FINISHED) {
				throw new Error('No more closing elements expected for this template.');
			}

			this._nestingLevel--;

			if (this._nestingLevel === 0) {
				this._state = TemplateParser.State.FINISHED;