| "use strict"; |
| /** |
| * @license |
| * Copyright Google LLC All Rights Reserved. |
| * |
| * Use of this source code is governed by an MIT-style license that can be |
| * found in the LICENSE file at https://angular.io/license |
| */ |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| const schematics_1 = require("@angular-devkit/schematics"); |
| const parse5_element_1 = require("./parse5-element"); |
| const parse5_1 = require("parse5"); |
| /** Appends the given element HTML fragment to the `<head>` element of the specified HTML file. */ |
| function appendHtmlElementToHead(host, htmlFilePath, elementHtml) { |
| const htmlFileBuffer = host.read(htmlFilePath); |
| if (!htmlFileBuffer) { |
| throw new schematics_1.SchematicsException(`Could not read file for path: ${htmlFilePath}`); |
| } |
| const htmlContent = htmlFileBuffer.toString(); |
| if (htmlContent.includes(elementHtml)) { |
| return; |
| } |
| const headTag = getHtmlHeadTagElement(htmlContent); |
| if (!headTag) { |
| throw `Could not find '<head>' element in HTML file: ${htmlFileBuffer}`; |
| } |
| // We always have access to the source code location here because the `getHeadTagElement` |
| // function explicitly has the `sourceCodeLocationInfo` option enabled. |
| const endTagOffset = headTag.sourceCodeLocation.endTag.startOffset; |
| const indentationOffset = parse5_element_1.getChildElementIndentation(headTag); |
| const insertion = `${' '.repeat(indentationOffset)}${elementHtml}`; |
| const recordedChange = host |
| .beginUpdate(htmlFilePath) |
| .insertRight(endTagOffset, `${insertion}\n`); |
| host.commitUpdate(recordedChange); |
| } |
| exports.appendHtmlElementToHead = appendHtmlElementToHead; |
| /** Parses the given HTML file and returns the head element if available. */ |
| function getHtmlHeadTagElement(htmlContent) { |
| const document = parse5_1.parse(htmlContent, { sourceCodeLocationInfo: true }); |
| const nodeQueue = [...document.childNodes]; |
| while (nodeQueue.length) { |
| const node = nodeQueue.shift(); |
| if (node.nodeName.toLowerCase() === 'head') { |
| return node; |
| } |
| else if (node.childNodes) { |
| nodeQueue.push(...node.childNodes); |
| } |
| } |
| return null; |
| } |
| exports.getHtmlHeadTagElement = getHtmlHeadTagElement; |
| //# sourceMappingURL=html-head-element.js.map |
