618 lines
20 KiB
JavaScript
618 lines
20 KiB
JavaScript
"use strict";
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/*
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* Copyright (c) 2018-2019 Unrud <unrud@outlook.com>
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*
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* This file is part of Remote-Touchpad.
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*
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* Remote-Touchpad 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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* Remote-Touchpad 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 Remote-Touchpad. If not, see <http://www.gnu.org/licenses/>.
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*/
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// [1 Touch, 2 Touches, 3 Touches] (as pixel)
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var TOUCH_MOVE_THRESHOLD = [10, 15, 15];
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// Max time between consecutive touches for clicking or dragging (as milliseconds)
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var TOUCH_TIMEOUT = 250;
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// [[pixel/second, multiplicator], ...]
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var POINTER_ACCELERATION = [
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[0, 0],
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[87, 1],
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[173, 1],
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[553, 2]
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];
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var POINTER_BUTTON_LEFT = 0;
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var POINTER_BUTTON_RIGHT = 1;
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var POINTER_BUTTON_MIDDLE = 2;
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var KEY_VOLUME_MUTE = 0;
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var KEY_VOLUME_DOWN = 1;
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var KEY_VOLUME_UP = 2;
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var KEY_MEDIA_PLAY_PAUSE = 3;
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var KEY_MEDIA_PREV_TRACK = 4;
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var KEY_MEDIA_NEXT_TRACK = 5;
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var KEY_BROWSER_BACK = 6;
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var KEY_BROWSER_FORWARD = 7;
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var KEY_SUPER = 8;
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var KEY_LEFT = 9;
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var KEY_RIGHT = 10;
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var KEY_UP = 11;
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var KEY_DOWN = 12;
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var KEY_HOME = 13;
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var KEY_END = 14;
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var KEY_BACK_SPACE = 15;
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var KEY_DELETE = 16;
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var KEY_RETURN = 17;
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var ws = null;
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var config = null;
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var touchMoved = false;
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var touchStart = 0;
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var touchLastEnd = 0;
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var touchReleasedCount = 0;
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var ongoingTouches = [];
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var moveXSum = 0;
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var moveYSum = 0;
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var scrollXSum = 0;
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var scrollYSum = 0;
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var dragging = false;
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var draggingTimeout = null;
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var scrolling = false;
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var mouseButtons = 0;
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function fullscreenEnabled() {
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return (document.fullscreenEnabled ||
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document.webkitFullscreenEnabled ||
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document.mozFullScreenEnabled ||
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document.msFullscreenEnabled ||
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false);
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}
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function requestFullscreen(element, options) {
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if (element.requestFullscreen) {
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element.requestFullscreen(options);
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} else if (element.webkitRequestFullscreen) {
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element.webkitRequestFullscreen(options);
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} else if (element.mozRequestFullScreen) {
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element.mozRequestFullScreen(options);
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} else if (element.msRequestFullscreen) {
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element.msRequestFullscreen(options);
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}
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}
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function exitFullscreen() {
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if (document.exitFullscreen) {
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document.exitFullscreen();
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} else if (document.webkitExitFullscreen) {
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document.webkitExitFullscreen();
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} else if (document.mozCancelFullScreen) {
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document.mozCancelFullScreen();
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} else if (document.msExitFullscreen) {
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document.msExitFullscreen();
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}
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}
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function fullscreenElement() {
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return (document.fullscreenElement ||
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document.webkitFullscreenElement ||
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document.mozFullScreenElement ||
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document.msFullscreenElement ||
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null);
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}
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function addFullscreenchangeEventListener(listener) {
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if ("onfullscreenchange" in document) {
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document.addEventListener("fullscreenchange", listener);
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} else if ("onwebkitfullscreenchange" in document) {
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document.addEventListener("webkitfullscreenchange", listener);
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}
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}
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function requestPointerLock(element) {
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if (element.requestPointerLock) {
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element.requestPointerLock();
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} else if (element.mozRequestPointerLock) {
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element.mozRequestPointerLock();
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}
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}
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function exitPointerLock() {
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if (document.exitPointerLock) {
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document.exitPointerLock();
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} else if (document.mozExitPointerLock) {
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document.mozExitPointerLock();
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}
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}
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function pointerLockElement() {
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return (document.pointerLockElement ||
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document.mozPointerLockElement ||
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null);
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}
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function addPointerlockchangeEventListener(listener) {
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if ("onpointerlockchange" in document) {
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document.addEventListener("pointerlockchange", listener);
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} else if ("onmozpointerlockchange" in document) {
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document.addEventListener("mozpointerlockchange", listener);
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}
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}
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function copyTouch(touch, timeStamp) {
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return {
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identifier: touch.identifier,
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pageX: touch.pageX,
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pageXStart: touch.pageX,
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pageY: touch.pageY,
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pageYStart: touch.pageY,
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timeStamp: timeStamp
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};
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}
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function ongoingTouchIndexById(idToFind) {
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for (var i = 0; i < ongoingTouches.length; i += 1) {
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if (ongoingTouches[i].identifier == idToFind) {
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return i;
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}
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}
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return -1;
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}
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function calculatePointerAccelerationMult(speed) {
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for (var i = 0; i < POINTER_ACCELERATION.length; i += 1) {
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var s2 = POINTER_ACCELERATION[i][0];
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var a2 = POINTER_ACCELERATION[i][1];
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if (s2 <= speed) {
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continue;
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}
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if (i == 0) {
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return a2;
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}
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var s1 = POINTER_ACCELERATION[i - 1][0];
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var a1 = POINTER_ACCELERATION[i - 1][1];
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return ((speed - s1) / (s2 - s1)) * (a2 - a1) + a1;
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}
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if (POINTER_ACCELERATION.length > 0) {
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return POINTER_ACCELERATION[POINTER_ACCELERATION.length - 1][1];
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}
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return 1;
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}
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function onDraggingTimeout() {
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draggingTimeout = null;
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ws.send("b" + POINTER_BUTTON_LEFT + ";0");
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}
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function updateMove(x, y) {
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moveXSum += x;
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moveYSum += y;
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var xInt = Math.trunc(moveXSum);
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var yInt = Math.trunc(moveYSum);
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if (xInt != 0 || yInt != 0) {
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moveXSum -= xInt;
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moveYSum -= yInt;
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ws.send("m" + xInt + ";" + yInt);
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}
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}
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function updateScroll(x, y, scrollFinish) {
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scrollXSum += x;
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scrollYSum += y;
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var xInt = Math.trunc(scrollXSum);
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var yInt = Math.trunc(scrollYSum);
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if (xInt != 0 || yInt != 0) {
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scrollXSum -= xInt;
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scrollYSum -= yInt;
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ws.send((scrollFinish ? "S" : "s") + xInt + ";" + yInt);
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scrolling = !scrollFinish;
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} else if (scrollFinish && scrolling) {
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ws.send("S");
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scrolling = false;
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}
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}
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function handleTouchstart(evt) {
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// Might get called multiple times for the same touches
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if (ongoingTouches.length == 0) {
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touchStart = evt.timeStamp;
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touchMoved = false;
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}
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var touches = evt.changedTouches;
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for (var i = 0; i < touches.length; i += 1) {
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if (ongoingTouches.length == 0 && !touches[i].target.classList.contains("touch")) {
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continue;
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}
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evt.preventDefault();
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var touch = copyTouch(touches[i], evt.timeStamp);
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var idx = ongoingTouchIndexById(touch.identifier);
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if (idx < 0) {
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ongoingTouches.push(touch);
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} else {
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ongoingTouches[idx] = touch;
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}
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touchLastEnd = 0;
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if (draggingTimeout != null) {
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clearTimeout(draggingTimeout);
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draggingTimeout = null;
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dragging = true;
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}
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updateScroll(0, 0, true);
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}
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}
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function handleTouchend(evt) {
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var touches = evt.changedTouches;
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for (var i = 0; i < touches.length; i += 1) {
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var idx = ongoingTouchIndexById(touches[i].identifier);
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if (idx < 0) {
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continue;
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}
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evt.preventDefault();
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ongoingTouches.splice(idx, 1);
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touchReleasedCount += 1;
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touchLastEnd = evt.timeStamp;
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updateScroll(0, 0, true);
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}
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if (touchReleasedCount > TOUCH_MOVE_THRESHOLD.length) {
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touchMoved = true;
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}
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if (ongoingTouches.length == 0 && touchReleasedCount >= 1) {
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if (dragging) {
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dragging = false;
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ws.send("b" + POINTER_BUTTON_LEFT + ";0");
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}
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if (!touchMoved && evt.timeStamp - touchStart < TOUCH_TIMEOUT) {
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var button = 0;
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if (touchReleasedCount == 1) {
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button = POINTER_BUTTON_LEFT;
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} else if (touchReleasedCount == 2) {
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button = POINTER_BUTTON_RIGHT;
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} else if (touchReleasedCount == 3) {
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button = POINTER_BUTTON_MIDDLE;
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}
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ws.send("b" + button + ";1");
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if (button == POINTER_BUTTON_LEFT) {
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draggingTimeout = setTimeout(onDraggingTimeout, TOUCH_TIMEOUT);
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} else {
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ws.send("b" + button + ";0");
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}
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}
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touchReleasedCount = 0;
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}
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}
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function handleTouchmove(evt) {
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var sumX = 0;
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var sumY = 0;
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var touches = evt.changedTouches;
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for (var i = 0; i < touches.length; i += 1) {
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var idx = ongoingTouchIndexById(touches[i].identifier);
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if (idx < 0) {
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continue;
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}
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evt.preventDefault();
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if (!touchMoved) {
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var dist = Math.sqrt(Math.pow(touches[i].pageX - ongoingTouches[idx].pageXStart, 2) +
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Math.pow(touches[i].pageY - ongoingTouches[idx].pageYStart, 2));
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if (ongoingTouches.length > TOUCH_MOVE_THRESHOLD.length ||
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dist > TOUCH_MOVE_THRESHOLD[ongoingTouches.length - 1] ||
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evt.timeStamp - touchStart >= TOUCH_TIMEOUT) {
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touchMoved = true;
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}
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}
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var dx = touches[i].pageX - ongoingTouches[idx].pageX;
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var dy = touches[i].pageY - ongoingTouches[idx].pageY;
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var timeDelta = evt.timeStamp - ongoingTouches[idx].timeStamp;
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sumX += dx * calculatePointerAccelerationMult(Math.abs(dx) / timeDelta * 1000);
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sumY += dy * calculatePointerAccelerationMult(Math.abs(dy) / timeDelta * 1000);
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ongoingTouches[idx].pageX = touches[i].pageX;
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ongoingTouches[idx].pageY = touches[i].pageY;
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ongoingTouches[idx].timeStamp = evt.timeStamp;
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}
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if (touchMoved && evt.timeStamp - touchLastEnd >= TOUCH_TIMEOUT) {
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if (ongoingTouches.length == 1 || dragging) {
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updateMove(sumX*config.moveSpeed, sumY*config.moveSpeed);
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} else if (ongoingTouches.length == 2) {
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updateScroll(-sumX*config.scrollSpeed, -sumY*config.scrollSpeed, false);
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}
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}
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}
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function handleKeydown(evt) {
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if (evt.ctrlKey || evt.altKey || evt.isComposing) {
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return;
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}
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var key = null;
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if (evt.key == "OS" || evt.key == "Super" || evt.key == "Meta") {
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key = KEY_SUPER;
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} else if (evt.key == "Backspace") {
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key = KEY_BACK_SPACE;
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} else if (evt.key == "Enter") {
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key = KEY_RETURN;
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} else if (evt.key == "Delete") {
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key = KEY_DELETE;
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} else if (evt.key == "Home") {
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key = KEY_HOME;
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} else if (evt.key == "End") {
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key = KEY_END;
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} else if (evt.key == "Left" || evt.key == "ArrowLeft") {
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key = KEY_LEFT;
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} else if (evt.key == "Right" || evt.key == "ArrowRight") {
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key = KEY_RIGHT;
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} else if (evt.key == "Up" || evt.key == "ArrowUp") {
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key = KEY_UP;
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} else if (evt.key == "Down" || evt.key == "ArrowDown") {
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key = KEY_DOWN;
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}
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if (key != null) {
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if (!evt.shiftKey) {
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evt.preventDefault();
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ws.send("k" + key);
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}
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} else if (evt.key.length == 1) {
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evt.preventDefault();
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ws.send("t" + evt.key);
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}
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}
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function updateMouseButtons(buttons) {
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for (var button = 0; button < 3; button += 1) {
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var flag = 1 << button;
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if ((buttons&flag) != (mouseButtons&flag)) {
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ws.send("b" + button + ";" + (buttons&flag ? 1 : 0));
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}
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}
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mouseButtons = buttons;
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}
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function handleMousedown(evt) {
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updateMouseButtons(evt.buttons);
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}
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function handleMouseup(evt) {
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updateMouseButtons(evt.buttons);
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}
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function handleMousemove(evt) {
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updateMove(evt.movementX*config.mouseMoveSpeed, evt.movementY*config.mouseMoveSpeed);
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}
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function handleWheel(evt) {
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if (evt.deltaMode == WheelEvent.DOM_DELTA_PIXEL) {
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updateScroll(evt.deltaX*config.mouseScrollSpeed, evt.deltaY*config.mouseScrollSpeed, true);
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} else if (evt.deltaMode == WheelEvent.DOM_DELTA_LINE) {
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updateScroll(evt.deltaX*20*config.mouseScrollSpeed, evt.deltaY*20*config.mouseScrollSpeed, true);
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}
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}
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function challengeResponse(message) {
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var shaObj = new jsSHA("SHA-256", "TEXT");
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shaObj.setHMACKey(message, "TEXT");
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shaObj.update(window.location.hash.substr(1));
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return btoa(shaObj.getHMAC("BYTES"));
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}
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window.addEventListener("load", function() {
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var DEFAULT_KEYS_SCENE = {
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"": 0,
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"keyboard": 1
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};
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var ready = false;
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var scenes = document.querySelectorAll("body > .scene");
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var opening = document.getElementById("opening");
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var closed = document.getElementById("closed");
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var pad = document.getElementById("pad");
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var keys = document.getElementById("keys");
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var keysScenes = keys.querySelectorAll(".scene");
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var keyboard = document.getElementById("keyboard");
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var fullscreenbutton = document.getElementById("fullscreenbutton");
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var keyboardtext = document.getElementById("keyboardtext");
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var mouse = document.getElementById("mouse")
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var activeScene;
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var keysActiveName;
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function showScene(scene) {
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activeScene = scene;
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if (fullscreenElement() && !scene.classList.contains("fullscreen")) {
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exitFullscreen();
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}
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if (pointerLockElement() && activeScene != mouse) {
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exitPointerLock();
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}
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keyboardtext.value = "";
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scenes.forEach(function(otherScene) {
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otherScene.classList.toggle("hidden", otherScene != scene);
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});
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}
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function showKeysScene(index) {
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if (!Number.isInteger(index) || index < 0 || keysScenes.length <= index) {
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index = 0;
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}
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sessionStorage.setItem(keysActiveName, index);
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for (var i = 0; i < keysScenes.length; i += 1) {
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keysScenes[i].classList.toggle("hidden", i != index);
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}
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}
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function showKeys(name) {
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showScene(keys);
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keysActiveName = "keys" + (name ? ":" + name : "");
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var keysIndex = parseInt(sessionStorage.getItem(keysActiveName));
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if (isNaN(keysIndex)) {
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keysIndex = DEFAULT_KEYS_SCENE[name || ""] || 0;
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}
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showKeysScene(keysIndex);
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if (history.state != keysActiveName) {
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history.pushState(keysActiveName, "");
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}
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}
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function showKeyboard() {
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showScene(keyboard);
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keyboardtext.value = sessionStorage.getItem("keyboard") || "";
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keyboardtext.focus();
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if (history.state != "keyboard") {
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history.pushState("keyboard", "");
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}
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}
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keyboardtext.oninput = function() {
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sessionStorage.setItem("keyboard", keyboardtext.value);
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};
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showScene(opening);
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var wsURL = new URL("ws", location.href);
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wsURL.protocol = wsURL.protocol == "http:" ? "ws:" : "wss:";
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ws = new WebSocket(wsURL);
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var authenticated = false;
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ws.onmessage = function(evt) {
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if (!authenticated) {
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ws.send(challengeResponse(evt.data));
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authenticated = true;
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return;
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}
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try {
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config = JSON.parse(evt.data);
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} catch (e) {
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console.log(e);
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ws.close();
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return;
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}
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ready = true;
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window.onpopstate();
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};
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ws.onclose = function() {
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ready = false;
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showScene(closed);
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};
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document.getElementById("keysbutton").addEventListener("click", function() {
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showKeys();
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});
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document.getElementById("keyboardbutton").addEventListener("click", function() {
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showKeyboard();
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});
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addFullscreenchangeEventListener(function() {
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if (fullscreenElement() && !activeScene.classList.contains("fullscreen")) {
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exitFullscreen();
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}
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});
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if (!fullscreenEnabled()) {
|
|
fullscreenbutton.classList.add("hidden");
|
|
}
|
|
fullscreenbutton.addEventListener("click", function() {
|
|
if (fullscreenElement()) {
|
|
exitFullscreen();
|
|
} else {
|
|
requestFullscreen(document.documentElement, {navigationUI: "hide"});
|
|
}
|
|
});
|
|
document.getElementById("switchbutton").addEventListener("click", function() {
|
|
var keysIndex = 0;
|
|
for (var i = 0; i < keysScenes.length; i += 1) {
|
|
if (!keysScenes[i].classList.contains("hidden")) {
|
|
keysIndex = i;
|
|
}
|
|
}
|
|
showKeysScene(keysIndex + 1);
|
|
});
|
|
[
|
|
{id: "browserbackbutton", key: KEY_BROWSER_BACK},
|
|
{id: "superbutton", key: KEY_SUPER},
|
|
{id: "browserforwardbutton", key: KEY_BROWSER_FORWARD},
|
|
{id: "prevtrackbutton", key: KEY_MEDIA_PREV_TRACK},
|
|
{id: "playpausebutton", key: KEY_MEDIA_PLAY_PAUSE},
|
|
{id: "nexttrackbutton", key: KEY_MEDIA_NEXT_TRACK},
|
|
{id: "volumedownbutton", key: KEY_VOLUME_DOWN},
|
|
{id: "volumemutebutton", key: KEY_VOLUME_MUTE},
|
|
{id: "volumeupbutton", key: KEY_VOLUME_UP},
|
|
{id: "backspacebutton", key: KEY_BACK_SPACE},
|
|
{id: "returnbutton", key: KEY_RETURN},
|
|
{id: "deletebutton", key: KEY_DELETE},
|
|
{id: "homebutton", key: KEY_HOME},
|
|
{id: "endbutton", key: KEY_END},
|
|
{id: "leftbutton", key: KEY_LEFT},
|
|
{id: "rightbutton", key: KEY_RIGHT},
|
|
{id: "upbutton", key: KEY_UP},
|
|
{id: "downbutton", key: KEY_DOWN}
|
|
].forEach(function(o) {
|
|
document.getElementById(o.id).addEventListener("click", function() {
|
|
ws.send("k" + o.key);
|
|
});
|
|
});
|
|
document.getElementById("keyboardkeysbutton").addEventListener("click", function() {
|
|
showKeys("keyboard");
|
|
});
|
|
document.getElementById("sendbutton").addEventListener("click", function() {
|
|
if (keyboardtext.value) {
|
|
ws.send("t" + keyboardtext.value);
|
|
keyboardtext.value = "";
|
|
keyboardtext.oninput();
|
|
}
|
|
history.back();
|
|
});
|
|
window.onpopstate = function() {
|
|
if (ready) {
|
|
if (pointerLockElement()) {
|
|
showScene(mouse);
|
|
} else if ((history.state || "").split(":")[0] == "keys") {
|
|
showKeys(history.state.substr("keys:".length));
|
|
} else if (history.state == "keyboard") {
|
|
showKeyboard();
|
|
} else {
|
|
showScene(pad);
|
|
}
|
|
}
|
|
};
|
|
document.getElementById("reloadbutton").addEventListener("click", function() {
|
|
location.reload();
|
|
});
|
|
document.querySelectorAll(".backbutton").forEach(function(button) {
|
|
button.addEventListener("click", function() {
|
|
history.back();
|
|
});
|
|
});
|
|
document.addEventListener("touchstart", handleTouchstart);
|
|
document.addEventListener("touchend", handleTouchend);
|
|
document.addEventListener("touchcancel", handleTouchend);
|
|
document.addEventListener("touchmove", handleTouchmove);
|
|
document.addEventListener("keydown", function(evt) {
|
|
if (activeScene && activeScene.classList.contains("key")) {
|
|
handleKeydown(evt);
|
|
}
|
|
});
|
|
addPointerlockchangeEventListener(function() {
|
|
if (pointerLockElement() && !ready) {
|
|
exitPointerLock();
|
|
}
|
|
window.onpopstate();
|
|
});
|
|
document.addEventListener("mousedown", function(event) {
|
|
if (activeScene != mouse && event.buttons == 1 && event.target.classList.contains("touch")) {
|
|
requestPointerLock(mouse);
|
|
}
|
|
});
|
|
["touchstart", "touchend", "touchcancel", "touchmove"].forEach(function(type) {
|
|
mouse.addEventListener(type, function(evt) {
|
|
evt.preventDefault();
|
|
});
|
|
});
|
|
mouse.addEventListener("mousedown", handleMousedown);
|
|
mouse.addEventListener("mouseup", handleMouseup);
|
|
mouse.addEventListener("mousemove", handleMousemove);
|
|
mouse.addEventListener("wheel", handleWheel);
|
|
});
|