gecko-dev/browser/extensions/formautofill/FormAutofillHandler.jsm

1238 строки
35 KiB
JavaScript

/* 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/. */
/*
* Defines a handler object to represent forms that autofill can handle.
*/
"use strict";
var EXPORTED_SYMBOLS = ["FormAutofillHandler"];
const { AppConstants } = ChromeUtils.import(
"resource://gre/modules/AppConstants.jsm"
);
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
const { XPCOMUtils } = ChromeUtils.import(
"resource://gre/modules/XPCOMUtils.jsm"
);
const { FormAutofill } = ChromeUtils.import(
"resource://formautofill/FormAutofill.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"FormAutofillUtils",
"resource://formautofill/FormAutofillUtils.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"FormAutofillHeuristics",
"resource://formautofill/FormAutofillHeuristics.jsm"
);
ChromeUtils.defineModuleGetter(
this,
"FormLikeFactory",
"resource://gre/modules/FormLikeFactory.jsm"
);
XPCOMUtils.defineLazyGetter(this, "reauthPasswordPromptMessage", () => {
const brandShortName = FormAutofillUtils.brandBundle.GetStringFromName(
"brandShortName"
);
return FormAutofillUtils.stringBundle.formatStringFromName(
`useCreditCardPasswordPrompt.${AppConstants.platform}`,
[brandShortName]
);
});
this.log = null;
FormAutofill.defineLazyLogGetter(this, EXPORTED_SYMBOLS[0]);
const { FIELD_STATES } = FormAutofillUtils;
class FormAutofillSection {
constructor(fieldDetails, winUtils) {
this.fieldDetails = fieldDetails;
this.filledRecordGUID = null;
this.winUtils = winUtils;
/**
* Enum for form autofill MANUALLY_MANAGED_STATES values
*/
this._FIELD_STATE_ENUM = {
// not themed
[FIELD_STATES.NORMAL]: null,
// highlighted
[FIELD_STATES.AUTO_FILLED]: "-moz-autofill",
// highlighted && grey color text
[FIELD_STATES.PREVIEW]: "-moz-autofill-preview",
};
if (!this.isValidSection()) {
this.fieldDetails = [];
log.debug(
`Ignoring ${
this.constructor.name
} related fields since it is an invalid section`
);
}
this._cacheValue = {
allFieldNames: null,
matchingSelectOption: null,
};
}
/*
* Examine the section is a valid section or not based on its fieldDetails or
* other information. This method must be overrided.
*
* @returns {boolean} True for a valid section, otherwise false
*
*/
isValidSection() {
throw new TypeError("isValidSection method must be overrided");
}
/*
* Examine the section is an enabled section type or not based on its
* preferences. This method must be overrided.
*
* @returns {boolean} True for an enabled section type, otherwise false
*
*/
isEnabled() {
throw new TypeError("isEnabled method must be overrided");
}
/*
* Examine the section is createable for storing the profile. This method
* must be overrided.
*
* @param {Object} record The record for examining createable
* @returns {boolean} True for the record is createable, otherwise false
*
*/
isRecordCreatable(record) {
throw new TypeError("isRecordCreatable method must be overrided");
}
/**
* Override this method if the profile is needed to apply some transformers.
*
* @param {Object} profile
* A profile should be converted based on the specific requirement.
*/
applyTransformers(profile) {}
/**
* Override this method if the profile is needed to be customized for
* previewing values.
*
* @param {Object} profile
* A profile for pre-processing before previewing values.
*/
preparePreviewProfile(profile) {}
/**
* Override this method if the profile is needed to be customized for filling
* values.
*
* @param {Object} profile
* A profile for pre-processing before filling values.
* @returns {boolean} Whether the profile should be filled.
*/
async prepareFillingProfile(profile) {
return true;
}
/*
* Override this methid if any data for `createRecord` is needed to be
* normailized before submitting the record.
*
* @param {Object} profile
* A record for normalization.
*/
normalizeCreatingRecord(data) {}
/*
* Override this method if there is any field value needs to compute for a
* specific case. Return the original value in the default case.
* @param {String} value
* The original field value.
* @param {Object} fieldDetail
* A fieldDetail of the related element.
* @param {HTMLElement} element
* A element for checking converting value.
*
* @returns {String}
* A string of the converted value.
*/
computeFillingValue(value, fieldName, element) {
return value;
}
set focusedInput(element) {
this._focusedDetail = this.getFieldDetailByElement(element);
}
getFieldDetailByElement(element) {
return this.fieldDetails.find(
detail => detail.elementWeakRef.get() == element
);
}
get allFieldNames() {
if (!this._cacheValue.allFieldNames) {
this._cacheValue.allFieldNames = this.fieldDetails.map(
record => record.fieldName
);
}
return this._cacheValue.allFieldNames;
}
getFieldDetailByName(fieldName) {
return this.fieldDetails.find(detail => detail.fieldName == fieldName);
}
matchSelectOptions(profile) {
if (!this._cacheValue.matchingSelectOption) {
this._cacheValue.matchingSelectOption = new WeakMap();
}
for (let fieldName in profile) {
let fieldDetail = this.getFieldDetailByName(fieldName);
if (!fieldDetail) {
continue;
}
let element = fieldDetail.elementWeakRef.get();
if (ChromeUtils.getClassName(element) !== "HTMLSelectElement") {
continue;
}
let cache = this._cacheValue.matchingSelectOption.get(element) || {};
let value = profile[fieldName];
if (cache[value] && cache[value].get()) {
continue;
}
let option = FormAutofillUtils.findSelectOption(
element,
profile,
fieldName
);
if (option) {
cache[value] = Cu.getWeakReference(option);
this._cacheValue.matchingSelectOption.set(element, cache);
} else {
if (cache[value]) {
delete cache[value];
this._cacheValue.matchingSelectOption.set(element, cache);
}
// Delete the field so the phishing hint won't treat it as a "also fill"
// field.
delete profile[fieldName];
}
}
}
adaptFieldMaxLength(profile) {
for (let key in profile) {
let detail = this.getFieldDetailByName(key);
if (!detail) {
continue;
}
let element = detail.elementWeakRef.get();
if (!element) {
continue;
}
let maxLength = element.maxLength;
if (
maxLength === undefined ||
maxLength < 0 ||
profile[key].length <= maxLength
) {
continue;
}
if (maxLength) {
profile[key] = profile[key].substr(0, maxLength);
} else {
delete profile[key];
}
}
}
getAdaptedProfiles(originalProfiles) {
for (let profile of originalProfiles) {
this.applyTransformers(profile);
}
return originalProfiles;
}
/**
* Processes form fields that can be autofilled, and populates them with the
* profile provided by backend.
*
* @param {Object} profile
* A profile to be filled in.
*/
async autofillFields(profile) {
let focusedDetail = this._focusedDetail;
if (!focusedDetail) {
throw new Error("No fieldDetail for the focused input.");
}
if (!(await this.prepareFillingProfile(profile))) {
log.debug("profile cannot be filled", profile);
return;
}
log.debug("profile in autofillFields:", profile);
this.filledRecordGUID = profile.guid;
for (let fieldDetail of this.fieldDetails) {
// Avoid filling field value in the following cases:
// 1. a non-empty input field for an unfocused input
// 2. the invalid value set
// 3. value already chosen in select element
let element = fieldDetail.elementWeakRef.get();
if (!element) {
continue;
}
element.previewValue = "";
let value = profile[fieldDetail.fieldName];
if (ChromeUtils.getClassName(element) === "HTMLInputElement" && value) {
// For the focused input element, it will be filled with a valid value
// anyway.
// For the others, the fields should be only filled when their values
// are empty.
let focusedInput = focusedDetail.elementWeakRef.get();
if (
element == focusedInput ||
(element != focusedInput && !element.value)
) {
element.setUserInput(value);
this._changeFieldState(fieldDetail, FIELD_STATES.AUTO_FILLED);
}
} else if (ChromeUtils.getClassName(element) === "HTMLSelectElement") {
let cache = this._cacheValue.matchingSelectOption.get(element) || {};
let option = cache[value] && cache[value].get();
if (!option) {
continue;
}
// Do not change value or dispatch events if the option is already selected.
// Use case for multiple select is not considered here.
if (!option.selected) {
option.selected = true;
element.dispatchEvent(
new element.ownerGlobal.Event("input", { bubbles: true })
);
element.dispatchEvent(
new element.ownerGlobal.Event("change", { bubbles: true })
);
}
// Autofill highlight appears regardless if value is changed or not
this._changeFieldState(fieldDetail, FIELD_STATES.AUTO_FILLED);
}
}
}
/**
* Populates result to the preview layers with given profile.
*
* @param {Object} profile
* A profile to be previewed with
*/
previewFormFields(profile) {
log.debug("preview profile: ", profile);
this.preparePreviewProfile(profile);
for (let fieldDetail of this.fieldDetails) {
let element = fieldDetail.elementWeakRef.get();
let value = profile[fieldDetail.fieldName] || "";
// Skip the field that is null
if (!element) {
continue;
}
if (ChromeUtils.getClassName(element) === "HTMLSelectElement") {
// Unlike text input, select element is always previewed even if
// the option is already selected.
if (value) {
let cache = this._cacheValue.matchingSelectOption.get(element) || {};
let option = cache[value] && cache[value].get();
if (option) {
value = option.text || "";
} else {
value = "";
}
}
} else if (element.value) {
// Skip the field if it already has text entered.
continue;
}
element.previewValue = value;
this._changeFieldState(
fieldDetail,
value ? FIELD_STATES.PREVIEW : FIELD_STATES.NORMAL
);
}
}
/**
* Clear preview text and background highlight of all fields.
*/
clearPreviewedFormFields() {
log.debug("clear previewed fields in:", this.form);
for (let fieldDetail of this.fieldDetails) {
let element = fieldDetail.elementWeakRef.get();
if (!element) {
log.warn(fieldDetail.fieldName, "is unreachable");
continue;
}
element.previewValue = "";
// We keep the state if this field has
// already been auto-filled.
if (fieldDetail.state == FIELD_STATES.AUTO_FILLED) {
continue;
}
this._changeFieldState(fieldDetail, FIELD_STATES.NORMAL);
}
}
/**
* Clear value and highlight style of all filled fields.
*/
clearPopulatedForm() {
for (let fieldDetail of this.fieldDetails) {
let element = fieldDetail.elementWeakRef.get();
if (!element) {
log.warn(fieldDetail.fieldName, "is unreachable");
continue;
}
// Only reset value for input element.
if (
fieldDetail.state == FIELD_STATES.AUTO_FILLED &&
ChromeUtils.getClassName(element) === "HTMLInputElement"
) {
element.setUserInput("");
}
}
}
/**
* Change the state of a field to correspond with different presentations.
*
* @param {Object} fieldDetail
* A fieldDetail of which its element is about to update the state.
* @param {string} nextState
* Used to determine the next state
*/
_changeFieldState(fieldDetail, nextState) {
let element = fieldDetail.elementWeakRef.get();
if (!element) {
log.warn(fieldDetail.fieldName, "is unreachable while changing state");
return;
}
if (!(nextState in this._FIELD_STATE_ENUM)) {
log.warn(
fieldDetail.fieldName,
"is trying to change to an invalid state"
);
return;
}
if (fieldDetail.state == nextState) {
return;
}
for (let [state, mmStateValue] of Object.entries(this._FIELD_STATE_ENUM)) {
// The NORMAL state is simply the absence of other manually
// managed states so we never need to add or remove it.
if (!mmStateValue) {
continue;
}
if (state == nextState) {
this.winUtils.addManuallyManagedState(element, mmStateValue);
} else {
this.winUtils.removeManuallyManagedState(element, mmStateValue);
}
}
switch (nextState) {
case FIELD_STATES.NORMAL: {
if (fieldDetail.state == FIELD_STATES.AUTO_FILLED) {
element.removeEventListener("input", this, { mozSystemGroup: true });
}
break;
}
case FIELD_STATES.AUTO_FILLED: {
element.addEventListener("input", this, { mozSystemGroup: true });
break;
}
}
fieldDetail.state = nextState;
}
resetFieldStates() {
for (let fieldDetail of this.fieldDetails) {
const element = fieldDetail.elementWeakRef.get();
element.removeEventListener("input", this, { mozSystemGroup: true });
this._changeFieldState(fieldDetail, FIELD_STATES.NORMAL);
}
this.filledRecordGUID = null;
}
isFilled() {
return !!this.filledRecordGUID;
}
/**
* Return the record that is converted from `fieldDetails` and only valid
* form record is included.
*
* @returns {Object|null}
* A record object consists of three properties:
* - guid: The id of the previously-filled profile or null if omitted.
* - record: A valid record converted from details with trimmed result.
* - untouchedFields: Fields that aren't touched after autofilling.
* Return `null` for any uncreatable or invalid record.
*/
createRecord() {
let details = this.fieldDetails;
if (!this.isEnabled() || !details || details.length == 0) {
return null;
}
let data = {
guid: this.filledRecordGUID,
record: {},
untouchedFields: [],
};
details.forEach(detail => {
let element = detail.elementWeakRef.get();
// Remove the unnecessary spaces
let value = element && element.value.trim();
value = this.computeFillingValue(value, detail, element);
if (!value || value.length > FormAutofillUtils.MAX_FIELD_VALUE_LENGTH) {
// Keep the property and preserve more information for updating
data.record[detail.fieldName] = "";
return;
}
data.record[detail.fieldName] = value;
if (detail.state == FIELD_STATES.AUTO_FILLED) {
data.untouchedFields.push(detail.fieldName);
}
});
this.normalizeCreatingRecord(data);
if (!this.isRecordCreatable(data.record)) {
return null;
}
return data;
}
handleEvent(event) {
switch (event.type) {
case "input": {
if (!event.isTrusted) {
return;
}
const target = event.target;
const targetFieldDetail = this.getFieldDetailByElement(target);
this._changeFieldState(targetFieldDetail, FIELD_STATES.NORMAL);
let isAutofilled = false;
let dimFieldDetails = [];
for (const fieldDetail of this.fieldDetails) {
const element = fieldDetail.elementWeakRef.get();
if (ChromeUtils.getClassName(element) === "HTMLSelectElement") {
// Dim fields are those we don't attempt to revert their value
// when clear the target set, such as <select>.
dimFieldDetails.push(fieldDetail);
} else {
isAutofilled |= fieldDetail.state == FIELD_STATES.AUTO_FILLED;
}
}
if (!isAutofilled) {
// Restore the dim fields to initial state as well once we knew
// that user had intention to clear the filled form manually.
for (const fieldDetail of dimFieldDetails) {
this._changeFieldState(fieldDetail, FIELD_STATES.NORMAL);
}
this.filledRecordGUID = null;
}
break;
}
}
}
}
class FormAutofillAddressSection extends FormAutofillSection {
constructor(fieldDetails, winUtils) {
super(fieldDetails, winUtils);
this._cacheValue.oneLineStreetAddress = null;
}
isValidSection() {
return (
this.fieldDetails.length >= FormAutofillUtils.AUTOFILL_FIELDS_THRESHOLD
);
}
isEnabled() {
return FormAutofill.isAutofillAddressesEnabled;
}
isRecordCreatable(record) {
if (
record.country &&
!FormAutofill.supportedCountries.includes(record.country)
) {
// We don't want to save data in the wrong fields due to not having proper
// heuristic regexes in countries we don't yet support.
log.warn("isRecordCreatable: Country not supported:", record.country);
return false;
}
let hasName = 0;
let length = 0;
for (let key of Object.keys(record)) {
if (!record[key]) {
continue;
}
if (FormAutofillUtils.getCategoryFromFieldName(key) == "name") {
hasName = 1;
continue;
}
length++;
}
return length + hasName >= FormAutofillUtils.AUTOFILL_FIELDS_THRESHOLD;
}
_getOneLineStreetAddress(address) {
if (!this._cacheValue.oneLineStreetAddress) {
this._cacheValue.oneLineStreetAddress = {};
}
if (!this._cacheValue.oneLineStreetAddress[address]) {
this._cacheValue.oneLineStreetAddress[
address
] = FormAutofillUtils.toOneLineAddress(address);
}
return this._cacheValue.oneLineStreetAddress[address];
}
addressTransformer(profile) {
if (profile["street-address"]) {
// "-moz-street-address-one-line" is used by the labels in
// ProfileAutoCompleteResult.
profile["-moz-street-address-one-line"] = this._getOneLineStreetAddress(
profile["street-address"]
);
let streetAddressDetail = this.getFieldDetailByName("street-address");
if (
streetAddressDetail &&
ChromeUtils.getClassName(streetAddressDetail.elementWeakRef.get()) ===
"HTMLInputElement"
) {
profile["street-address"] = profile["-moz-street-address-one-line"];
}
let waitForConcat = [];
for (let f of ["address-line3", "address-line2", "address-line1"]) {
waitForConcat.unshift(profile[f]);
if (this.getFieldDetailByName(f)) {
if (waitForConcat.length > 1) {
profile[f] = FormAutofillUtils.toOneLineAddress(waitForConcat);
}
waitForConcat = [];
}
}
}
}
/**
* Replace tel with tel-national if tel violates the input element's
* restriction.
* @param {Object} profile
* A profile to be converted.
*/
telTransformer(profile) {
if (!profile.tel || !profile["tel-national"]) {
return;
}
let detail = this.getFieldDetailByName("tel");
if (!detail) {
return;
}
let element = detail.elementWeakRef.get();
let _pattern;
let testPattern = str => {
if (!_pattern) {
// The pattern has to match the entire value.
_pattern = new RegExp("^(?:" + element.pattern + ")$", "u");
}
return _pattern.test(str);
};
if (element.pattern) {
if (testPattern(profile.tel)) {
return;
}
} else if (element.maxLength) {
if (
detail._reason == "autocomplete" &&
profile.tel.length <= element.maxLength
) {
return;
}
}
if (detail._reason != "autocomplete") {
// Since we only target people living in US and using en-US websites in
// MVP, it makes more sense to fill `tel-national` instead of `tel`
// if the field is identified by heuristics and no other clues to
// determine which one is better.
// TODO: [Bug 1407545] This should be improved once more countries are
// supported.
profile.tel = profile["tel-national"];
} else if (element.pattern) {
if (testPattern(profile["tel-national"])) {
profile.tel = profile["tel-national"];
}
} else if (element.maxLength) {
if (profile["tel-national"].length <= element.maxLength) {
profile.tel = profile["tel-national"];
}
}
}
/*
* Apply all address related transformers.
*
* @param {Object} profile
* A profile for adjusting address related value.
* @override
*/
applyTransformers(profile) {
this.addressTransformer(profile);
this.telTransformer(profile);
this.matchSelectOptions(profile);
this.adaptFieldMaxLength(profile);
}
computeFillingValue(value, fieldDetail, element) {
// Try to abbreviate the value of select element.
if (
fieldDetail.fieldName == "address-level1" &&
ChromeUtils.getClassName(element) === "HTMLSelectElement"
) {
// Don't save the record when the option value is empty *OR* there
// are multiple options being selected. The empty option is usually
// assumed to be default along with a meaningless text to users.
if (!value || element.selectedOptions.length != 1) {
// Keep the property and preserve more information for address updating
value = "";
} else {
let text = element.selectedOptions[0].text.trim();
value =
FormAutofillUtils.getAbbreviatedSubregionName([value, text]) || text;
}
}
return value;
}
normalizeCreatingRecord(address) {
if (!address) {
return;
}
// Normalize Country
if (address.record.country) {
let detail = this.getFieldDetailByName("country");
// Try identifying country field aggressively if it doesn't come from
// @autocomplete.
if (detail._reason != "autocomplete") {
let countryCode = FormAutofillUtils.identifyCountryCode(
address.record.country
);
if (countryCode) {
address.record.country = countryCode;
}
}
}
// Normalize Tel
FormAutofillUtils.compressTel(address.record);
if (address.record.tel) {
let allTelComponentsAreUntouched = Object.keys(address.record)
.filter(
field => FormAutofillUtils.getCategoryFromFieldName(field) == "tel"
)
.every(field => address.untouchedFields.includes(field));
if (allTelComponentsAreUntouched) {
// No need to verify it if none of related fields are modified after autofilling.
if (!address.untouchedFields.includes("tel")) {
address.untouchedFields.push("tel");
}
} else {
let strippedNumber = address.record.tel.replace(/[\s\(\)-]/g, "");
// Remove "tel" if it contains invalid characters or the length of its
// number part isn't between 5 and 15.
// (The maximum length of a valid number in E.164 format is 15 digits
// according to https://en.wikipedia.org/wiki/E.164 )
if (!/^(\+?)[\da-zA-Z]{5,15}$/.test(strippedNumber)) {
address.record.tel = "";
}
}
}
}
}
class FormAutofillCreditCardSection extends FormAutofillSection {
constructor(fieldDetails, winUtils) {
super(fieldDetails, winUtils);
}
isValidSection() {
let ccNumberReason = "";
let hasCCNumber = false;
let hasExpiryDate = false;
let hasCCName = false;
for (let detail of this.fieldDetails) {
switch (detail.fieldName) {
case "cc-number":
hasCCNumber = true;
ccNumberReason = detail._reason;
break;
case "cc-name":
case "cc-given-name":
case "cc-additional-name":
case "cc-family-name":
hasCCName = true;
break;
case "cc-exp":
case "cc-exp-month":
case "cc-exp-year":
hasExpiryDate = true;
break;
}
}
return (
hasCCNumber &&
(ccNumberReason == "autocomplete" || hasExpiryDate || hasCCName)
);
}
isEnabled() {
return FormAutofill.isAutofillCreditCardsEnabled;
}
isRecordCreatable(record) {
return (
record["cc-number"] && FormAutofillUtils.isCCNumber(record["cc-number"])
);
}
creditCardExpDateTransformer(profile) {
if (!profile["cc-exp"]) {
return;
}
let detail = this.getFieldDetailByName("cc-exp");
if (!detail) {
return;
}
let element = detail.elementWeakRef.get();
if (element.tagName != "INPUT" || !element.placeholder) {
return;
}
let result,
ccExpMonth = profile["cc-exp-month"],
ccExpYear = profile["cc-exp-year"],
placeholder = element.placeholder;
result = /(?:[^m]|\b)(m{1,2})\s*([-/\\]*)\s*(y{2,4})(?!y)/i.exec(
placeholder
);
if (result) {
profile["cc-exp"] =
String(ccExpMonth).padStart(result[1].length, "0") +
result[2] +
String(ccExpYear).substr(-1 * result[3].length);
return;
}
result = /(?:[^y]|\b)(y{2,4})\s*([-/\\]*)\s*(m{1,2})(?!m)/i.exec(
placeholder
);
if (result) {
profile["cc-exp"] =
String(ccExpYear).substr(-1 * result[1].length) +
result[2] +
String(ccExpMonth).padStart(result[3].length, "0");
}
}
async _decrypt(cipherText, reauth) {
return new Promise(resolve => {
Services.cpmm.addMessageListener(
"FormAutofill:DecryptedString",
function getResult(result) {
Services.cpmm.removeMessageListener(
"FormAutofill:DecryptedString",
getResult
);
resolve(result.data);
}
);
Services.cpmm.sendAsyncMessage("FormAutofill:GetDecryptedString", {
cipherText,
reauth,
});
});
}
/*
* Apply all credit card related transformers.
*
* @param {Object} profile
* A profile for adjusting credit card related value.
* @override
*/
applyTransformers(profile) {
this.matchSelectOptions(profile);
this.creditCardExpDateTransformer(profile);
this.adaptFieldMaxLength(profile);
}
/**
* Customize for previewing prorifle.
*
* @param {Object} profile
* A profile for pre-processing before previewing values.
* @override
*/
preparePreviewProfile(profile) {
// Always show the decrypted credit card number when Master Password is
// disabled.
if (profile["cc-number-decrypted"]) {
profile["cc-number"] = profile["cc-number-decrypted"];
}
}
/**
* Customize for filling prorifle.
*
* @param {Object} profile
* A profile for pre-processing before filling values.
* @returns {boolean} Whether the profile should be filled.
* @override
*/
async prepareFillingProfile(profile) {
// Prompt the OS login dialog to get the decrypted credit
// card number.
if (profile["cc-number-encrypted"]) {
let decrypted = await this._decrypt(
profile["cc-number-encrypted"],
reauthPasswordPromptMessage
);
if (!decrypted) {
// Early return if the decrypted is empty or undefined
return false;
}
profile["cc-number"] = decrypted;
}
return true;
}
}
/**
* Handles profile autofill for a DOM Form element.
*/
class FormAutofillHandler {
/**
* Initialize the form from `FormLike` object to handle the section or form
* operations.
* @param {FormLike} form Form that need to be auto filled
*/
constructor(form) {
this._updateForm(form);
/**
* A WindowUtils reference of which Window the form belongs
*/
this.winUtils = this.form.rootElement.ownerGlobal.windowUtils;
/**
* Time in milliseconds since epoch when a user started filling in the form.
*/
this.timeStartedFillingMS = null;
}
set focusedInput(element) {
let section = this._sectionCache.get(element);
if (!section) {
section = this.sections.find(s => s.getFieldDetailByElement(element));
this._sectionCache.set(element, section);
}
this._focusedSection = section;
if (section) {
section.focusedInput = element;
}
}
get activeSection() {
return this._focusedSection;
}
/**
* Check the form is necessary to be updated. This function should be able to
* detect any changes including all control elements in the form.
* @param {HTMLElement} element The element supposed to be in the form.
* @returns {boolean} FormAutofillHandler.form is updated or not.
*/
updateFormIfNeeded(element) {
// When the following condition happens, FormAutofillHandler.form should be
// updated:
// * The count of form controls is changed.
// * When the element can not be found in the current form.
//
// However, we should improve the function to detect the element changes.
// e.g. a tel field is changed from type="hidden" to type="tel".
let _formLike;
let getFormLike = () => {
if (!_formLike) {
_formLike = FormLikeFactory.createFromField(element);
}
return _formLike;
};
let currentForm = element.form;
if (!currentForm) {
currentForm = getFormLike();
}
if (currentForm.elements.length != this.form.elements.length) {
log.debug("The count of form elements is changed.");
this._updateForm(getFormLike());
return true;
}
if (!this.form.elements.includes(element)) {
log.debug("The element can not be found in the current form.");
this._updateForm(getFormLike());
return true;
}
return false;
}
/**
* Update the form with a new FormLike, and the related fields should be
* updated or clear to ensure the data consistency.
* @param {FormLike} form a new FormLike to replace the original one.
*/
_updateForm(form) {
/**
* DOM Form element to which this object is attached.
*/
this.form = form;
/**
* Array of collected data about relevant form fields. Each item is an object
* storing the identifying details of the field and a reference to the
* originally associated element from the form.
*
* The "section", "addressType", "contactType", and "fieldName" values are
* used to identify the exact field when the serializable data is received
* from the backend. There cannot be multiple fields which have
* the same exact combination of these values.
*
* A direct reference to the associated element cannot be sent to the user
* interface because processing may be done in the parent process.
*/
this.fieldDetails = null;
this.sections = [];
this._sectionCache = new WeakMap();
}
/**
* Set fieldDetails from the form about fields that can be autofilled.
*
* @param {boolean} allowDuplicates
* true to remain any duplicated field details otherwise to remove the
* duplicated ones.
* @returns {Array} The valid address and credit card details.
*/
collectFormFields(allowDuplicates = false) {
let sections = FormAutofillHeuristics.getFormInfo(
this.form,
allowDuplicates
);
let allValidDetails = [];
for (let { fieldDetails, type } of sections) {
let section;
if (type == FormAutofillUtils.SECTION_TYPES.ADDRESS) {
section = new FormAutofillAddressSection(fieldDetails, this.winUtils);
} else if (type == FormAutofillUtils.SECTION_TYPES.CREDIT_CARD) {
section = new FormAutofillCreditCardSection(
fieldDetails,
this.winUtils
);
} else {
throw new Error("Unknown field type.");
}
this.sections.push(section);
allValidDetails.push(...section.fieldDetails);
}
for (let detail of allValidDetails) {
let input = detail.elementWeakRef.get();
if (!input) {
continue;
}
input.addEventListener("input", this, { mozSystemGroup: true });
}
this.fieldDetails = allValidDetails;
return allValidDetails;
}
_hasFilledSection() {
return this.sections.some(section => section.isFilled());
}
/**
* Processes form fields that can be autofilled, and populates them with the
* profile provided by backend.
*
* @param {Object} profile
* A profile to be filled in.
*/
async autofillFormFields(profile) {
let noFilledSectionsPreviously = !this._hasFilledSection();
await this.activeSection.autofillFields(profile);
const onChangeHandler = e => {
if (!e.isTrusted) {
return;
}
if (e.type == "reset") {
for (let section of this.sections) {
section.resetFieldStates();
}
}
// Unregister listeners once no field is in AUTO_FILLED state.
if (!this._hasFilledSection()) {
this.form.rootElement.removeEventListener("input", onChangeHandler, {
mozSystemGroup: true,
});
this.form.rootElement.removeEventListener("reset", onChangeHandler, {
mozSystemGroup: true,
});
}
};
if (noFilledSectionsPreviously) {
// Handle the highlight style resetting caused by user's correction afterward.
log.debug("register change handler for filled form:", this.form);
this.form.rootElement.addEventListener("input", onChangeHandler, {
mozSystemGroup: true,
});
this.form.rootElement.addEventListener("reset", onChangeHandler, {
mozSystemGroup: true,
});
}
}
handleEvent(event) {
switch (event.type) {
case "input":
if (!event.isTrusted) {
return;
}
for (let detail of this.fieldDetails) {
let input = detail.elementWeakRef.get();
if (!input) {
continue;
}
input.removeEventListener("input", this, { mozSystemGroup: true });
}
this.timeStartedFillingMS = Date.now();
break;
}
}
/**
* Collect the filled sections within submitted form and convert all the valid
* field data into multiple records.
*
* @returns {Object} records
* {Array.<Object>} records.address
* {Array.<Object>} records.creditCard
*/
createRecords() {
const records = {
address: [],
creditCard: [],
};
for (const section of this.sections) {
const secRecord = section.createRecord();
if (!secRecord) {
continue;
}
if (section instanceof FormAutofillAddressSection) {
records.address.push(secRecord);
} else if (section instanceof FormAutofillCreditCardSection) {
records.creditCard.push(secRecord);
} else {
throw new Error("Unknown section type");
}
}
log.debug("Create records:", records);
return records;
}
}