Lady’s Gitweb - Lemon/blob - dev-deps.js

   1 // 🍋🏷 Lemon ∷ dev-deps.js
   2 // ====================================================================
   3 //
   4 // Copyright © 2021–2022 Lady [@ Lady’s Computer].
   5 //
   6 // This Source Code Form is subject to the terms of the Mozilla Public
   7 // License, v. 2.0. If a copy of the MPL was not distributed with this
   8 // file, You can obtain one at <https://mozilla.org/MPL/2.0/>.
   9
  10 import { xhtmlNamespace } from "./names.js";
  11 import {
  12   DOMImplementation,
  13   Node,
  14 } from "https://esm.sh/@xmldom/xmldom@0.8.2/lib/dom.js";
  15
  16 { // Polyfill document.
  17   globalThis.document = new DOMImplementation().createDocument(
  18     xhtmlNamespace,
  19     "html",
  20     null,
  21   );
  22 }
  23
  24 { // Polyfill `element.append()`.
  25   Object.getPrototypeOf(
  26     globalThis.document.documentElement,
  27   ).append = function (...children) {
  28     for (const child of children) {
  29       this.appendChild(
  30         typeof child === "string"
  31           ? this.ownerDocument.createTextNode(child)
  32           : child,
  33       );
  34     }
  35   };
  36 }
  37
  38 { // Polyfill `Node` and apply patches to `Node.nodeType` and
  39   // `Node.normalize`.
  40   globalThis.Node = Node;
  41   const originalNodeTypeGetter = Object.getOwnPropertyDescriptor(
  42     Node.prototype,
  43     "nodeType",
  44   )?.get ?? (() => {
  45     const originalNodeTypeValue = Node.prototype.nodeType;
  46     return () => originalNodeTypeValue;
  47   })();
  48   Object.defineProperty(Node.prototype, "nodeType", {
  49     configurable: true,
  50     enumerable: true,
  51     /**
  52      * To simulate restrictions on calling `nodeType` only on actual
  53      * Nodes, check for inheritance first.
  54      */
  55     get() {
  56       if (!(this instanceof Node)) {
  57         // This is not a Node.
  58         throw new TypeError("nodeType requires this be a Node.");
  59       } else {
  60         // This is a Node; walk the prototype chain and attempt to get
  61         // the node type.
  62         for (
  63           //deno-lint-ignore no-this-alias
  64           let target = this;
  65           target != null && target != Node.prototype;
  66           target = Object.getPrototypeOf(target)
  67         ) {
  68           if (Object.hasOwn(target, "nodeType")) {
  69             return Reflect.get(target, "nodeType", this);
  70           } else {
  71             continue;
  72           }
  73         }
  74         return originalNodeTypeGetter.call(this);
  75       }
  76     },
  77     set: undefined,
  78   });
  79   Node.prototype.normalize = function () { // modified from xmldom
  80     let child = this.firstChild;
  81     while (child) {
  82       const next = child.nextSibling;
  83       if (
  84         next && next.nodeType == Node.TEXT_NODE &&
  85         child.nodeType == Node.TEXT_NODE
  86       ) {
  87         this.removeChild(next);
  88         child.appendData(next.data);
  89       } else {
  90         if (child.nodeType == Node.TEXT_NODE && !child.data) {
  91           this.removeChild(child);
  92         } else {
  93           child.normalize();
  94         }
  95         child = next;
  96       }
  97     }
  98   };
  99 }
 100
 101 export { assertStrictEquals } from "https://deno.land/std@0.134.0/testing/asserts.ts";