81 lines
2.4 KiB
TypeScript
81 lines
2.4 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 '../ml_parser/ast';
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import {splitNsName} from '../ml_parser/tags';
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const NG_CONTENT_SELECT_ATTR = 'select';
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const NG_CONTENT_ELEMENT = 'ng-content';
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const LINK_ELEMENT = 'link';
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const LINK_STYLE_REL_ATTR = 'rel';
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const LINK_STYLE_HREF_ATTR = 'href';
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const LINK_STYLE_REL_VALUE = 'stylesheet';
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const STYLE_ELEMENT = 'style';
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const SCRIPT_ELEMENT = 'script';
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const NG_NON_BINDABLE_ATTR = 'ngNonBindable';
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const NG_PROJECT_AS = 'ngProjectAs';
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export function preparseElement(ast: html.Element): PreparsedElement {
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let selectAttr: string = null !;
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let hrefAttr: string = null !;
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let relAttr: string = null !;
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let nonBindable = false;
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let projectAs: string = null !;
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ast.attrs.forEach(attr => {
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const lcAttrName = attr.name.toLowerCase();
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if (lcAttrName == NG_CONTENT_SELECT_ATTR) {
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selectAttr = attr.value;
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} else if (lcAttrName == LINK_STYLE_HREF_ATTR) {
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hrefAttr = attr.value;
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} else if (lcAttrName == LINK_STYLE_REL_ATTR) {
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relAttr = attr.value;
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} else if (attr.name == NG_NON_BINDABLE_ATTR) {
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nonBindable = true;
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} else if (attr.name == NG_PROJECT_AS) {
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if (attr.value.length > 0) {
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projectAs = attr.value;
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}
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}
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});
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selectAttr = normalizeNgContentSelect(selectAttr);
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const nodeName = ast.name.toLowerCase();
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let type = PreparsedElementType.OTHER;
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if (splitNsName(nodeName)[1] == NG_CONTENT_ELEMENT) {
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type = PreparsedElementType.NG_CONTENT;
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} else if (nodeName == STYLE_ELEMENT) {
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type = PreparsedElementType.STYLE;
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} else if (nodeName == SCRIPT_ELEMENT) {
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type = PreparsedElementType.SCRIPT;
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} else if (nodeName == LINK_ELEMENT && relAttr == LINK_STYLE_REL_VALUE) {
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type = PreparsedElementType.STYLESHEET;
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}
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return new PreparsedElement(type, selectAttr, hrefAttr, nonBindable, projectAs);
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}
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export enum PreparsedElementType {
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NG_CONTENT,
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STYLE,
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STYLESHEET,
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SCRIPT,
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OTHER
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}
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export class PreparsedElement {
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constructor(
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public type: PreparsedElementType, public selectAttr: string, public hrefAttr: string,
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public nonBindable: boolean, public projectAs: string) {}
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}
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function normalizeNgContentSelect(selectAttr: string): string {
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if (selectAttr === null || selectAttr.length === 0) {
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return '*';
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}
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return selectAttr;
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}
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