HTMLFrameElement-impl.js
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"use strict";
const DOMException = require("domexception");
const MIMEType = require("whatwg-mimetype");
const whatwgEncoding = require("whatwg-encoding");
const { parseURL, serializeURL } = require("whatwg-url");
const sniffHTMLEncoding = require("html-encoding-sniffer");
const { evaluateJavaScriptURL } = require("../window/navigation");
const HTMLElementImpl = require("./HTMLElement-impl").implementation;
const { reflectURLAttribute } = require("../../utils");
const { parseIntoDocument } = require("../../browser/parser");
const { documentBaseURL } = require("../helpers/document-base-url");
const { fireAnEvent } = require("../helpers/events");
const { getAttributeValue } = require("../attributes");
const idlUtils = require("../generated/utils");
function fireLoadEvent(document, frame, attaching) {
if (attaching) {
fireAnEvent("load", frame);
return;
}
const dummyPromise = Promise.resolve();
function onLoad() {
fireAnEvent("load", frame);
}
document._queue.push(dummyPromise, onLoad);
}
function fetchFrame(serializedURL, frame, document, contentDoc) {
const resourceLoader = document._resourceLoader;
let request;
function onFrameLoaded(data) {
const sniffOptions = {
defaultEncoding: document._encoding
};
if (request.response) {
const contentType = MIMEType.parse(request.response.headers["content-type"]) || new MIMEType("text/plain");
sniffOptions.transportLayerEncodingLabel = contentType.parameters.get("charset");
if (contentType) {
if (contentType.isXML()) {
contentDoc._parsingMode = "xml";
}
contentDoc.contentType = contentType.essence;
}
}
const encoding = sniffHTMLEncoding(data, sniffOptions);
contentDoc._encoding = encoding;
const html = whatwgEncoding.decode(data, contentDoc._encoding);
try {
parseIntoDocument(html, contentDoc);
} catch (error) {
if (
error instanceof DOMException &&
error.code === DOMException.SYNTAX_ERR &&
contentDoc._parsingMode === "xml"
) {
// As defined (https://html.spec.whatwg.org/#read-xml) parsing error in XML document may be reported inline by
// mutating the document.
const element = contentDoc.createElementNS("http://www.mozilla.org/newlayout/xml/parsererror.xml", "parsererror");
element.textContent = error.message;
while (contentDoc.childNodes.length > 0) {
contentDoc.removeChild(contentDoc.lastChild);
}
contentDoc.appendChild(element);
} else {
throw error;
}
}
contentDoc.close();
return new Promise((resolve, reject) => {
contentDoc.addEventListener("load", resolve);
contentDoc.addEventListener("error", reject);
});
}
request = resourceLoader.fetch(serializedURL, {
element: frame,
onLoad: onFrameLoaded
});
}
function canDispatchEvents(frame, attaching) {
if (!attaching) {
return false;
}
return Object.keys(frame._eventListeners).length === 0;
}
function loadFrame(frame, attaching) {
if (frame._contentDocument) {
if (frame._contentDocument._defaultView) {
// close calls delete on its document.
frame._contentDocument._defaultView.close();
} else {
delete frame._contentDocument;
}
}
const parentDoc = frame._ownerDocument;
// https://html.spec.whatwg.org/#process-the-iframe-attributes
let url;
const srcAttribute = getAttributeValue(frame, "src");
if (srcAttribute === "") {
url = parseURL("about:blank");
} else {
url = parseURL(srcAttribute, { baseURL: documentBaseURL(parentDoc) || undefined }) || parseURL("about:blank");
}
const serializedURL = serializeURL(url);
// This is not great, but prevents a require cycle during webidl2js generation
const wnd = new parentDoc._defaultView.constructor({
parsingMode: "html",
url: url.scheme === "javascript" || serializedURL === "about:blank" ? parentDoc.URL : serializedURL,
resourceLoader: parentDoc._defaultView._resourceLoader,
referrer: parentDoc.URL,
cookieJar: parentDoc._cookieJar,
pool: parentDoc._pool,
encoding: parentDoc._encoding,
runScripts: parentDoc._defaultView._runScripts,
commonForOrigin: parentDoc._defaultView._commonForOrigin,
pretendToBeVisual: parentDoc._defaultView._pretendToBeVisual
});
const contentDoc = frame._contentDocument = idlUtils.implForWrapper(wnd._document);
const parent = parentDoc._defaultView;
const contentWindow = contentDoc._defaultView;
contentWindow._parent = parent;
contentWindow._top = parent.top;
contentWindow._frameElement = frame;
contentWindow._virtualConsole = parent._virtualConsole;
if (parentDoc.origin === contentDoc.origin) {
contentWindow._currentOriginData.windowsInSameOrigin.push(contentWindow);
}
const noQueue = canDispatchEvents(frame, attaching);
// Handle about:blank with a simulated load of an empty document.
if (serializedURL === "about:blank") {
// Cannot be done inside the enqueued callback; the documentElement etc. need to be immediately available.
parseIntoDocument("<html><head></head><body></body></html>", contentDoc);
contentDoc.close(noQueue);
if (noQueue) {
fireLoadEvent(parentDoc, frame, noQueue);
} else {
contentDoc.addEventListener("load", () => {
fireLoadEvent(parentDoc, frame);
});
}
} else if (url.scheme === "javascript") {
// Cannot be done inside the enqueued callback; the documentElement etc. need to be immediately available.
parseIntoDocument("<html><head></head><body></body></html>", contentDoc);
contentDoc.close(noQueue);
const result = evaluateJavaScriptURL(contentWindow, url);
if (typeof result === "string") {
contentDoc.body.textContent = result;
}
if (noQueue) {
fireLoadEvent(parentDoc, frame, noQueue);
} else {
contentDoc.addEventListener("load", () => {
fireLoadEvent(parentDoc, frame);
});
}
} else {
fetchFrame(serializedURL, frame, parentDoc, contentDoc);
}
}
function refreshAccessors(document) {
const window = document._defaultView;
if (!window) {
return;
}
const frames = document.querySelectorAll("iframe,frame");
// delete accessors for all frames
for (let i = 0; i < window._length; ++i) {
delete window[i];
}
window._length = frames.length;
Array.prototype.forEach.call(frames, (frame, i) => {
Object.defineProperty(window, i, {
configurable: true,
enumerable: true,
get() {
return frame.contentWindow;
}
});
});
}
class HTMLFrameElementImpl extends HTMLElementImpl {
constructor(args, privateData) {
super(args, privateData);
this._contentDocument = null;
}
_attrModified(name, value, oldVal) {
super._attrModified(name, value, oldVal);
if (name === "src") {
// iframe should never load in a document without a Window
// (e.g. implementation.createHTMLDocument)
if (this._attached && this._ownerDocument._defaultView) {
loadFrame(this);
}
}
}
_detach() {
super._detach();
if (this.contentWindow) {
this.contentWindow.close();
}
refreshAccessors(this._ownerDocument);
}
_attach() {
super._attach();
if (this._ownerDocument._defaultView) {
loadFrame(this, true);
}
refreshAccessors(this._ownerDocument);
}
get contentDocument() {
return this._contentDocument;
}
get contentWindow() {
return this.contentDocument ? this.contentDocument._defaultView : null;
}
get src() {
return reflectURLAttribute(this, "src");
}
set src(value) {
this.setAttributeNS(null, "src", value);
}
get longDesc() {
return reflectURLAttribute(this, "longdesc");
}
set longDesc(value) {
this.setAttributeNS(null, "longdesc", value);
}
}
module.exports = {
implementation: HTMLFrameElementImpl
};