| 1 | 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type Awaitable<T> = T | Promise<T>;\n\nexport function append<K, V>(m: Map<K, V[]>, k: K, v: V) {\n const vs = m.get(k) ?? [];\n vs.push(v);\n return m.set(k, vs);\n}\n\nexport async function* promiseToAsyncIterable<T>(promise: Promise<T>): AsyncIterableIterator<T> {\n yield await promise;\n}\n\nexport function* treeWalkerToIter(walker: TreeWalker): IterableIterator<Node> {\n let node = walker.nextNode();\n while (node) {\n yield node;\n node = walker.nextNode();\n }\n}\n\ntype Content = string;\n\n/** Fragment form string function that works with linkedom. */\nfunction fragmentFromString(document: Document, html: string) {\n const temp = document.createElement('template');\n temp.innerHTML = html;\n return temp.content;\n}\n\nfunction replace(document: Document, node: Element | Text | Comment | null, content: string, opts?: ContentOptions) {\n node?.replaceWith(...opts?.html\n ? fragmentFromString(document, content).childNodes // depends on DOM.Iterable\n : [content]);\n}\n\nexport class ParsedHTMLRewriterNode {\n #node: Element | Text | Comment | null;\n #doc: Document;\n constructor(node: Element | Text | Comment | null, document: Document) {\n this.#node = node;\n this.#doc = document;\n }\n\n get removed() { return !this.#doc.contains(this.#node) }\n\n before(content: Content, opts?: ContentOptions): this {\n const before = this.#doc.createComment('');\n this.#node?.parentElement?.insertBefore(before, this.#node)\n replace(this.#doc, before, content, opts);\n return this;\n }\n\n after(content: Content, opts?: ContentOptions): this {\n const after = this.#doc.createComment('');\n this.#node?.parentElement?.insertBefore(after, this.#node.nextSibling)\n replace(this.#doc, after, content, opts);\n return this;\n }\n\n replace(content: Content, opts?: ContentOptions): this {\n replace(this.#doc, this.#node, content, opts);\n return this;\n }\n\n remove(): this {\n this.#node?.remove()\n return this;\n }\n}\n\nexport class ParsedHTMLRewriterElement extends ParsedHTMLRewriterNode {\n #node: Element;\n\n constructor(node: Element, document: Document) {\n super(node, document)\n this.#node = node;\n }\n\n get tagName() { return this.#node.tagName.toLowerCase() }\n get attributes(): Iterable<[string, string]> {\n return [...this.#node.attributes].map(attr => [attr.name, attr.value]);\n }\n get namespaceURI() { return this.#node.namespaceURI }\n\n getAttribute(name: string) {\n return this.#node.getAttribute(name);\n }\n\n hasAttribute(name: string) {\n return this.#node.hasAttribute(name);\n }\n\n setAttribute(name: string, value: string): this {\n this.#node.setAttribute(name, value);\n return this;\n }\n\n removeAttribute(name: string): this {\n this.#node.removeAttribute(name);\n return this;\n }\n\n prepend(content: Content, opts?: ContentOptions): this {\n return this.before(content, opts);\n }\n\n append(content: Content, opts?: ContentOptions): this {\n return this.after(content, opts);\n }\n\n setInnerContent(content: Content, opts?: ContentOptions): this {\n this.#node[opts?.html ? 'innerHTML' : 'textContent'] = content;\n return this;\n }\n\n removeAndKeepContent(): this {\n this.#node?.replaceWith(...this.#node.childNodes);\n return this;\n }\n}\n\nexport class ParsedHTMLRewriterText extends ParsedHTMLRewriterNode {\n #text: Text | null;\n #done: boolean;\n\n constructor(text: Text | null, document: Document) {\n super(text, document);\n this.#text = text;\n this.#done = text === null;\n }\n get text() { return this.#text?.textContent ?? '' }\n get lastInTextNode() { return this.#done }\n}\n\nexport class ParsedHTMLRewriterComment extends ParsedHTMLRewriterNode {\n #comm: Comment;\n constructor(comm: Comment, document: Document) {\n super(comm, document);\n this.#comm = comm;\n }\n get text() { return this.#comm.textContent ?? '' }\n set text(value: string) { this.#comm.textContent = value }\n}\n\nexport class ParsedHTMLRewriterDocumentType {\n #doctype: DocumentType;\n\n constructor(doctype: DocumentType) {\n this.#doctype = doctype;\n }\n get name() { return this.#doctype.name }\n get publicId() { return this.#doctype.publicId }\n get systemId() { return this.#doctype.systemId }\n}\n\nexport class ParsedHTMLRewriterEnd {\n #doc: Document;\n\n constructor(document: Document) {\n this.#doc = document;\n }\n\n append(content: Content, opts?: ContentOptions): this {\n const after = this.#doc.createComment('');\n this.#doc.insertBefore(after, null);\n replace(this.#doc, after, content, opts);\n return this;\n }\n}\n\n// function* ancestors(el: Node) {\n// while (el.parentElement) {\n// yield el.parentElement\n// el = el.parentElement\n// }\n// }\n\n// function root(el: Node): globalThis.HTMLElement | undefined {\n// const ancs = [...ancestors(el)]\n// return ancs[ancs.length - 1];\n// }\n\n// function* zip<X, Y>(xs: Iterable<X>, ys: Iterable<Y>): IterableIterator<[X, Y]> {\n// const xit = xs[Symbol.iterator]();\n// const yit = ys[Symbol.iterator]();\n// while (true) {\n// const [xr, yr] = [xit.next(), yit.next()];\n// if (xr.done || yr.done) break;\n// yield [xr.value, yr.value];\n// }\n// }\n\n// /* Checks if this element or any of its parents matches a given `selector`. */\n// function matchesAncestors(el: Element | null, selector: string): Element | null {\n// let curr = el;\n// while (curr != null) {\n// if (curr.matches(selector)) return curr;\n// curr = curr.parentElement;\n// }\n// return null;\n// }"]} |