100 lines
3.3 KiB
TypeScript
100 lines
3.3 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import * as html from '@angular/compiler/src/ml_parser/ast';
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import {HtmlParser} from '@angular/compiler/src/ml_parser/html_parser';
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import {getHtmlTagDefinition} from '@angular/compiler/src/ml_parser/html_tags';
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export function main() {
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describe('Node serializer', () => {
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let parser: HtmlParser;
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beforeEach(() => { parser = new HtmlParser(); });
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it('should support element', () => {
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const html = '<p></p>';
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const ast = parser.parse(html, 'url');
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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it('should support attributes', () => {
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const html = '<p k="value"></p>';
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const ast = parser.parse(html, 'url');
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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it('should support text', () => {
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const html = 'some text';
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const ast = parser.parse(html, 'url');
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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it('should support expansion', () => {
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const html = '{number, plural, =0 {none} =1 {one} other {many}}';
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const ast = parser.parse(html, 'url', true);
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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it('should support comment', () => {
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const html = '<!--comment-->';
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const ast = parser.parse(html, 'url', true);
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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it('should support nesting', () => {
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const html = `<div i18n="meaning|desc">
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<span>{{ interpolation }}</span>
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<!--comment-->
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<p expansion="true">
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{number, plural, =0 {{sex, select, other {<b>?</b>}}}}
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</p>
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</div>`;
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const ast = parser.parse(html, 'url', true);
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expect(serializeNodes(ast.rootNodes)).toEqual([html]);
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});
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});
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}
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class _SerializerVisitor implements html.Visitor {
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visitElement(element: html.Element, context: any): any {
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if (getHtmlTagDefinition(element.name).isVoid) {
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return `<${element.name}${this._visitAll(element.attrs, ' ')}/>`;
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}
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return `<${element.name}${this._visitAll(element.attrs, ' ')}>${this._visitAll(element.children)}</${element.name}>`;
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}
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visitAttribute(attribute: html.Attribute, context: any): any {
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return `${attribute.name}="${attribute.value}"`;
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}
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visitText(text: html.Text, context: any): any { return text.value; }
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visitComment(comment: html.Comment, context: any): any { return `<!--${comment.value}-->`; }
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visitExpansion(expansion: html.Expansion, context: any): any {
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return `{${expansion.switchValue}, ${expansion.type},${this._visitAll(expansion.cases)}}`;
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}
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visitExpansionCase(expansionCase: html.ExpansionCase, context: any): any {
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return ` ${expansionCase.value} {${this._visitAll(expansionCase.expression)}}`;
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}
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private _visitAll(nodes: html.Node[], join: string = ''): string {
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if (nodes.length == 0) {
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return '';
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}
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return join + nodes.map(a => a.visit(this, null)).join(join);
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}
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}
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const serializerVisitor = new _SerializerVisitor();
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export function serializeNodes(nodes: html.Node[]): string[] {
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return nodes.map(node => node.visit(serializerVisitor, null));
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} |