338 lines
9 KiB
JavaScript
338 lines
9 KiB
JavaScript
import { ElementType, isTag as isTagRaw } from "domelementtype";
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/**
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* This object will be used as the prototype for Nodes when creating a
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* DOM-Level-1-compliant structure.
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*/
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export class Node {
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constructor() {
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/** Parent of the node */
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this.parent = null;
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/** Previous sibling */
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this.prev = null;
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/** Next sibling */
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this.next = null;
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/** The start index of the node. Requires `withStartIndices` on the handler to be `true. */
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this.startIndex = null;
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/** The end index of the node. Requires `withEndIndices` on the handler to be `true. */
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this.endIndex = null;
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}
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// Read-write aliases for properties
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/**
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* Same as {@link parent}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get parentNode() {
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return this.parent;
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}
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set parentNode(parent) {
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this.parent = parent;
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}
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/**
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* Same as {@link prev}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get previousSibling() {
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return this.prev;
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}
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set previousSibling(prev) {
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this.prev = prev;
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}
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/**
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* Same as {@link next}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get nextSibling() {
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return this.next;
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}
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set nextSibling(next) {
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this.next = next;
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}
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/**
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* Clone this node, and optionally its children.
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*
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* @param recursive Clone child nodes as well.
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* @returns A clone of the node.
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*/
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cloneNode(recursive = false) {
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return cloneNode(this, recursive);
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}
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}
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/**
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* A node that contains some data.
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*/
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export class DataNode extends Node {
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/**
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* @param data The content of the data node
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*/
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constructor(data) {
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super();
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this.data = data;
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}
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/**
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* Same as {@link data}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get nodeValue() {
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return this.data;
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}
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set nodeValue(data) {
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this.data = data;
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}
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}
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/**
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* Text within the document.
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*/
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export class Text extends DataNode {
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constructor() {
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super(...arguments);
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this.type = ElementType.Text;
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}
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get nodeType() {
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return 3;
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}
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}
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/**
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* Comments within the document.
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*/
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export class Comment extends DataNode {
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constructor() {
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super(...arguments);
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this.type = ElementType.Comment;
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}
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get nodeType() {
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return 8;
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}
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}
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/**
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* Processing instructions, including doc types.
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*/
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export class ProcessingInstruction extends DataNode {
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constructor(name, data) {
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super(data);
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this.name = name;
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this.type = ElementType.Directive;
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}
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get nodeType() {
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return 1;
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}
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}
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/**
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* A `Node` that can have children.
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*/
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export class NodeWithChildren extends Node {
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/**
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* @param children Children of the node. Only certain node types can have children.
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*/
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constructor(children) {
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super();
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this.children = children;
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}
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// Aliases
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/** First child of the node. */
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get firstChild() {
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var _a;
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return (_a = this.children[0]) !== null && _a !== void 0 ? _a : null;
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}
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/** Last child of the node. */
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get lastChild() {
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return this.children.length > 0
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? this.children[this.children.length - 1]
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: null;
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}
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/**
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* Same as {@link children}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get childNodes() {
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return this.children;
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}
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set childNodes(children) {
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this.children = children;
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}
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}
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export class CDATA extends NodeWithChildren {
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constructor() {
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super(...arguments);
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this.type = ElementType.CDATA;
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}
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get nodeType() {
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return 4;
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}
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}
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/**
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* The root node of the document.
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*/
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export class Document extends NodeWithChildren {
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constructor() {
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super(...arguments);
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this.type = ElementType.Root;
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}
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get nodeType() {
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return 9;
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}
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}
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/**
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* An element within the DOM.
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*/
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export class Element extends NodeWithChildren {
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/**
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* @param name Name of the tag, eg. `div`, `span`.
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* @param attribs Object mapping attribute names to attribute values.
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* @param children Children of the node.
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*/
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constructor(name, attribs, children = [], type = name === "script"
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? ElementType.Script
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: name === "style"
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? ElementType.Style
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: ElementType.Tag) {
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super(children);
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this.name = name;
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this.attribs = attribs;
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this.type = type;
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}
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get nodeType() {
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return 1;
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}
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// DOM Level 1 aliases
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/**
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* Same as {@link name}.
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* [DOM spec](https://dom.spec.whatwg.org)-compatible alias.
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*/
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get tagName() {
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return this.name;
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}
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set tagName(name) {
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this.name = name;
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}
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get attributes() {
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return Object.keys(this.attribs).map((name) => {
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var _a, _b;
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return ({
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name,
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value: this.attribs[name],
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namespace: (_a = this["x-attribsNamespace"]) === null || _a === void 0 ? void 0 : _a[name],
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prefix: (_b = this["x-attribsPrefix"]) === null || _b === void 0 ? void 0 : _b[name],
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});
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});
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}
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node is a `Element`, `false` otherwise.
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*/
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export function isTag(node) {
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return isTagRaw(node);
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has the type `CDATA`, `false` otherwise.
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*/
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export function isCDATA(node) {
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return node.type === ElementType.CDATA;
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has the type `Text`, `false` otherwise.
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*/
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export function isText(node) {
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return node.type === ElementType.Text;
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has the type `Comment`, `false` otherwise.
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*/
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export function isComment(node) {
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return node.type === ElementType.Comment;
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
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*/
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export function isDirective(node) {
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return node.type === ElementType.Directive;
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has the type `ProcessingInstruction`, `false` otherwise.
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*/
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export function isDocument(node) {
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return node.type === ElementType.Root;
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}
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/**
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* @param node Node to check.
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* @returns `true` if the node has children, `false` otherwise.
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*/
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export function hasChildren(node) {
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return Object.prototype.hasOwnProperty.call(node, "children");
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}
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/**
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* Clone a node, and optionally its children.
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*
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* @param recursive Clone child nodes as well.
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* @returns A clone of the node.
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*/
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export function cloneNode(node, recursive = false) {
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let result;
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if (isText(node)) {
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result = new Text(node.data);
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}
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else if (isComment(node)) {
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result = new Comment(node.data);
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}
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else if (isTag(node)) {
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const children = recursive ? cloneChildren(node.children) : [];
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const clone = new Element(node.name, { ...node.attribs }, children);
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children.forEach((child) => (child.parent = clone));
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if (node.namespace != null) {
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clone.namespace = node.namespace;
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}
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if (node["x-attribsNamespace"]) {
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clone["x-attribsNamespace"] = { ...node["x-attribsNamespace"] };
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}
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if (node["x-attribsPrefix"]) {
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clone["x-attribsPrefix"] = { ...node["x-attribsPrefix"] };
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}
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result = clone;
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}
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else if (isCDATA(node)) {
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const children = recursive ? cloneChildren(node.children) : [];
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const clone = new CDATA(children);
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children.forEach((child) => (child.parent = clone));
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result = clone;
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}
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else if (isDocument(node)) {
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const children = recursive ? cloneChildren(node.children) : [];
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const clone = new Document(children);
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children.forEach((child) => (child.parent = clone));
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if (node["x-mode"]) {
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clone["x-mode"] = node["x-mode"];
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}
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result = clone;
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}
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else if (isDirective(node)) {
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const instruction = new ProcessingInstruction(node.name, node.data);
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if (node["x-name"] != null) {
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instruction["x-name"] = node["x-name"];
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instruction["x-publicId"] = node["x-publicId"];
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instruction["x-systemId"] = node["x-systemId"];
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}
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result = instruction;
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}
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else {
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throw new Error(`Not implemented yet: ${node.type}`);
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}
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result.startIndex = node.startIndex;
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result.endIndex = node.endIndex;
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if (node.sourceCodeLocation != null) {
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result.sourceCodeLocation = node.sourceCodeLocation;
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}
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return result;
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}
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function cloneChildren(childs) {
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const children = childs.map((child) => cloneNode(child, true));
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for (let i = 1; i < children.length; i++) {
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children[i].prev = children[i - 1];
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children[i - 1].next = children[i];
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}
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return children;
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}
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