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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* A factory to generate LoginForm objects that represent a set of login fields
* which aren't necessarily marked up with a <form> element.
*/
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
FormLikeFactory: "resource://gre/modules/FormLikeFactory.sys.mjs",
LoginHelper: "resource://gre/modules/LoginHelper.sys.mjs",
});
ChromeUtils.defineLazyGetter(lazy, "log", () => {
return lazy.LoginHelper.createLogger("LoginFormFactory");
});
export const LoginFormFactory = {
/**
* WeakMap of the root element of a LoginForm to the LoginForm representing its fields.
*
* This is used to be able to lookup an existing LoginForm for a given root element since multiple
* calls to LoginFormFactory.createFrom* won't give the exact same object. When batching fills we don't always
* want to use the most recent list of elements for a LoginForm since we may end up doing multiple
* fills for the same set of elements when a field gets added between arming and running the
* DeferredTask.
*
* @type {WeakMap}
*/
_loginFormsByRootElement: new WeakMap(),
/**
* Maps all DOM content documents in this content process, including those in
* frames, to a WeakSet of LoginForm.rootElement for the document.
*/
_loginFormRootElementsByDocument: new WeakMap(),
/**
* Create a LoginForm object from a <form>.
*
* @param {HTMLFormElement} aForm
* @return {LoginForm}
* @throws Error if aForm isn't an HTMLFormElement
*/
createFromForm(aForm) {
let formLike = lazy.FormLikeFactory.createFromForm(aForm);
formLike.action = lazy.LoginHelper.getFormActionOrigin(aForm);
let rootElementsSet = this.getRootElementsWeakSetForDocument(
formLike.ownerDocument
);
rootElementsSet.add(formLike.rootElement);
lazy.log.debug(
"adding",
formLike.rootElement,
"to root elements for",
formLike.ownerDocument
);
this._loginFormsByRootElement.set(formLike.rootElement, formLike);
return formLike;
},
/**
* Create a LoginForm object from a password or username field.
*
* If the field is in a <form>, construct the LoginForm from the form.
* Otherwise, create a LoginForm with a rootElement (wrapper) according to
* heuristics. Currently all <input> not in a <form> are one LoginForm but this
* shouldn't be relied upon as the heuristics may change to detect multiple
* "forms" (e.g. registration and login) on one page with a <form>.
*
* Note that two LoginForms created from the same field won't return the same LoginForm object.
* Use the `rootElement` property on the LoginForm as a key instead.
*
* @param {HTMLInputElement} aField - a password or username field in a document
* @return {LoginForm}
* @throws Error if aField isn't a password or username field in a document
*/
createFromField(aField) {
if (
!HTMLInputElement.isInstance(aField) ||
(!aField.hasBeenTypePassword &&
!lazy.LoginHelper.isUsernameFieldType(aField)) ||
!aField.ownerDocument
) {
throw new Error(
"createFromField requires a password or username field in a document"
);
}
let form =
aField.form ||
lazy.FormLikeFactory.closestFormIgnoringShadowRoots(aField);
if (form) {
return this.createFromForm(form);
} else if (aField.hasAttribute("form")) {
lazy.log.debug(
"createFromField: field has form attribute but no form: ",
aField.getAttribute("form")
);
}
let formLike = lazy.FormLikeFactory.createFromField(aField);
formLike.action = lazy.LoginHelper.getLoginOrigin(
aField.ownerDocument.baseURI
);
lazy.log.debug(
"Created non-form LoginForm for rootElement:",
aField.ownerDocument.documentElement
);
let rootElementsSet = this.getRootElementsWeakSetForDocument(
formLike.ownerDocument
);
rootElementsSet.add(formLike.rootElement);
lazy.log.debug(
"adding",
formLike.rootElement,
"to root elements for",
formLike.ownerDocument
);
this._loginFormsByRootElement.set(formLike.rootElement, formLike);
return formLike;
},
getRootElementsWeakSetForDocument(aDocument) {
let rootElementsSet = this._loginFormRootElementsByDocument.get(aDocument);
if (!rootElementsSet) {
rootElementsSet = new WeakSet();
this._loginFormRootElementsByDocument.set(aDocument, rootElementsSet);
}
return rootElementsSet;
},
getForRootElement(aRootElement) {
return this._loginFormsByRootElement.get(aRootElement);
},
setForRootElement(aRootElement, aLoginForm) {
return this._loginFormsByRootElement.set(aRootElement, aLoginForm);
},
};
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