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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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
FormLikeFactory: "resource://gre/modules/FormLikeFactory.sys.mjs",
FormAutofillHandler:
"resource://gre/modules/shared/FormAutofillHandler.sys.mjs",
});
export class FormStateManager {
constructor(onSubmit, onAutofillCallback) {
/**
* @type {WeakMap} mapping FormLike root HTML elements to FormAutofillHandler objects.
*/
this._formsDetails = new WeakMap();
/**
* @type {object} The object where to store the active items, e.g. element,
* handler, section, and field detail.
*/
this._activeItems = {};
this.onSubmit = onSubmit;
this.onAutofillCallback = onAutofillCallback;
}
/**
* Get the active input's information from cache which is created after page
* identified.
*
* @returns {object | null}
* Return the active input's information that cloned from content cache
* (or return null if the information is not found in the cache).
*/
get activeFieldDetail() {
if (!this._activeItems.fieldDetail) {
let formDetails = this.activeFormDetails;
if (!formDetails) {
return null;
}
for (let detail of formDetails) {
let detailElement = detail.elementWeakRef.get();
if (detailElement && this.activeInput == detailElement) {
this._activeItems.fieldDetail = detail;
break;
}
}
}
return this._activeItems.fieldDetail;
}
/**
* Get the active form's information from cache which is created after page
* identified.
*
* @returns {Array<object> | null}
* Return target form's information from content cache
* (or return null if the information is not found in the cache).
*
*/
get activeFormDetails() {
let formHandler = this.activeHandler;
return formHandler ? formHandler.fieldDetails : null;
}
get activeInput() {
let elementWeakRef = this._activeItems.elementWeakRef;
return elementWeakRef ? elementWeakRef.get() : null;
}
get activeHandler() {
const activeInput = this.activeInput;
if (!activeInput) {
return null;
}
// XXX: We are recomputing the activeHandler every time to avoid keeping a
// reference on the active element. This might be called quite frequently
// so if _getFormHandler/findRootForField become more costly, we should
// look into caching this result (eg by adding a weakmap).
let handler = this._getFormHandler(activeInput);
if (handler) {
handler.focusedInput = activeInput;
}
return handler;
}
get activeSection() {
let formHandler = this.activeHandler;
return formHandler ? formHandler.activeSection : null;
}
/**
* Get the form's handler from cache which is created after page identified.
*
* @param {HTMLInputElement} element Focused input which triggered profile searching
* @returns {Array<object> | null}
* Return target form's handler from content cache
* (or return null if the information is not found in the cache).
*
*/
_getFormHandler(element) {
if (!element) {
return null;
}
let rootElement = lazy.FormLikeFactory.findRootForField(element);
return this._formsDetails.get(rootElement);
}
identifyAutofillFields(element) {
let formHandler = this._getFormHandler(element);
if (!formHandler) {
let formLike = lazy.FormLikeFactory.createFromField(element);
formHandler = new lazy.FormAutofillHandler(
formLike,
this.onSubmit,
this.onAutofillCallback
);
} else if (!formHandler.updateFormIfNeeded(element)) {
return formHandler.fieldDetails;
}
this._formsDetails.set(formHandler.form.rootElement, formHandler);
return formHandler.collectFormFields();
}
updateActiveInput(element) {
if (!element) {
this._activeItems = {};
return;
}
this._activeItems = {
elementWeakRef: Cu.getWeakReference(element),
fieldDetail: null,
};
}
getRecords(formElement, handler) {
handler = handler || this._formsDetails.get(formElement);
const records = handler?.createRecords();
if (
!handler ||
!records ||
!Object.values(records).some(typeRecords => typeRecords.length)
) {
return null;
}
return records;
}
}
export default FormStateManager;
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