components/autofill/ios/form_util/resources/fill_constants.ts

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '//components/autofill/ios/form_util/resources/create_fill_namespace.js';

import {gCrWebLegacy} from '//ios/web/public/js_messaging/resources/gcrweb.js';

declare type FormControlElement =
    HTMLInputElement | HTMLTextAreaElement | HTMLSelectElement;

/**
 * The maximum length allowed for form data.
 *
 * This variable is from AutofillTable::kMaxDataLength in
 * chromium/src/components/autofill/core/browser/webdata/autofill_table.h
 */
const MAX_DATA_LENGTH = 1024;

/**
 * The maximum string length supported by Autofill.
 *
 * This variable is from kMaxStringLength in
 * chromium/src/components/autofill/core/common/autofill_constant.h
 */
const MAX_STRING_LENGTH = 1024;

/**
 * The maximum number of form fields we are willing to parse, due to
 * computational costs. Several examples of forms with lots of fields that are
 * not relevant to Autofill: (1) the Netflix queue; (2) the Amazon wishlist;
 * (3) router configuration pages; and (4) other configuration pages, e.g. for
 * Google code project settings.
 *
 * This variable is `kMaxExtractableFields` from
 * chromium/src/components/autofill/core/common/autofill_constants.h
 */
const MAX_EXTRACTABLE_FIELDS = 200;

// The maximum number of frames we are willing to extract, due to computational
// costs.
const MAX_EXTRACTABLE_FRAMES = 20;

/**
 * A value for the "presentation" role.
 *
 * This variable is from enum RoleAttribute in
 * chromium/src/components/autofill/core/common/form_field_data.h
 */
const ROLE_ATTRIBUTE_PRESENTATION = 0;

/**
 * The value for a unique form or field ID not set or missing.
 */
const RENDERER_ID_NOT_SET = '0';

/**
 Name of the html attribute used for storing stable unique form and field IDs.
 */
const UNIQUE_ID_ATTRIBUTE = '__gChrome_uniqueID';

/**
 * The JS Symbol object used to set stable unique form and field IDs.
 */
const ID_SYMBOL = window.Symbol.for(UNIQUE_ID_ATTRIBUTE);

/**
 Name of the html attribute used for storing the remote frame token assigned to
 a child frame. Stored as an attribute of the iframe html element hosting the
 child frame.
 */
const CHILD_FRAME_REMOTE_TOKEN_ATTRIBUTE = '__gChrome_childFrameRemoteToken';

export {
  CHILD_FRAME_REMOTE_TOKEN_ATTRIBUTE,
  FormControlElement,
  MAX_DATA_LENGTH,
  MAX_STRING_LENGTH,
  MAX_EXTRACTABLE_FIELDS,
  MAX_EXTRACTABLE_FRAMES,
  ROLE_ATTRIBUTE_PRESENTATION,
  RENDERER_ID_NOT_SET,
  UNIQUE_ID_ATTRIBUTE,
};

gCrWebLegacy.fill.ID_SYMBOL = ID_SYMBOL;