84 lines
2.4 KiB
JavaScript
84 lines
2.4 KiB
JavaScript
/** \file
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* \brief This file contains wrappers for the DOM API
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*
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* \see https://dom.spec.whatwg.org/
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*
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* \author Copyright (C) 2021 Libor Polcak
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*
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* \license SPDX-License-Identifier: GPL-3.0-or-later
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*/
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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/** \file
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* \ingroup wrappers
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*
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* The events carry timestamp of their creation. As we allow wrapping of
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* several ways to obtain timestamps, we need to provide the same precision
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* for the Event API.
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*/
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(function() {
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var remember_past_values = `var precision = args[0];
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var doNoise = args[1];
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var pastValues = {};
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${rounding_function}
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${noise_function}
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var mitigationF = rounding_function;
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if (doNoise === true){
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mitigationF = function(value, precision) {
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let params = [value, precision];
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if (params in pastValues) {
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return pastValues[params];
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}
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let result = noise_function(...params);
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pastValues[params] = result;
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return result;
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}
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}
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`;
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var wrappers = [
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{
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/**
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* \see https://dom.spec.whatwg.org/#ref-for-dom-event-timestamp%E2%91%A0
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*/
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parent_object: "Event.prototype",
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parent_object_property: "timeStamp",
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wrapped_objects: [],
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helping_code: remember_past_values + `let origGet = Object.getOwnPropertyDescriptor(Event.prototype, "timeStamp").get`,
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post_wrapping_code: [
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{
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code_type: "object_properties",
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parent_object: "Event.prototype",
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parent_object_property: "timeStamp",
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wrapped_objects: [],
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/** \brief replaces Event.prototype.timeStamp getter to create
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* a timestamp with the desired precision.
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*/
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wrapped_properties: [
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{
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property_name: "get",
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property_value: `
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function() {
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return mitigationF(origGet.call(this), precision);
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}`,
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},
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],
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}
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],
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},
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]
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add_wrappers(wrappers);
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})()
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