capybara/public/index.html

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="user-scalable=no, width=device-width, initial-scale=1, maximum-scale=1"> <title>Document</title>
<script>
const loggerOfType = (components, type='log') => (...args) => {
let str = '%c';
const style = 'color: #5e81ac; font-weight: bold;';
for (const i in components) {
const v = components[i];
if (components[i+1] === undefined) {
str += `[${v}]`;
} else {
str += `[${v}] `;
}
}
switch (type) {
case 'log': {
console.log(str, style, ...args);
break;
}
case 'error': {
console.error(str, style, ...args);
break;
}
case 'warn': {
console.warn(str, style, ...args);
break;
}
case 'genmsg': {
return str;
}
default: {
return str;
}
}
};
function Logger(components, types=['warn', 'error', 'log']) {
const loggerObj = {};
for (const type of types) {
loggerObj[type] = loggerOfType(components, type);
}
return loggerObj;
}
class Connection {
constructor(url, logMessages=false) {
this.ws = null;
this.log = Logger(["Connection"], ["log"]).log;
this.messageLog = Logger(["Connection", "Message"], ["log"]).log;
this.logMessages = logMessages;
this.url = url;
}
connect() {
this.ws = new WebSocket(this.url);
this.ws.onerror = (e) => this.log("Error", e);
this.ws.onopen = () => {
this.log("Open");
};
this.ws.onclose = () => {
this.log("Closed - attempting to reconnect in 4000ms");
setTimeout(() => this.connect(), 4000);
}
}
sendMessage(code, params=[]) {
let message = code;
params.forEach((param, i) => {
if (i == params.length - 1)
message += param;
else
message += param + ";";
});
if (this.logMessages) this.messageLog(message);
this.ws.send(message);
return message;
}
disconnect() {
this.ws.close();
}
}
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class TouchpadController {
constructor(connection) {
this.currentMoveX = 0;
this.currentMoveY = 0;
this.lastMoveX = 0;
this.lastMoveY = 0;
this.shouldResetLastMove = false;
this.ongoingTouches = {};
this.log = Logger(["TouchpadController"], ["log"]).log;
this.connection = connection;
}
_sendRelativeMouseMovement(dx, dy) {
if (dx === 0 && dy === 0)
return;
this.connection.sendMessage("r", [dx, dy]);
}
_sendSingleClick(button="left") {
let buttonCode = 0;
if (button === "right") buttonCode = 1;
this.connection.sendMessage("d", [buttonCode]);
setTimeout(
() =>this.connection.sendMessage("u", [buttonCode]),
5
);
}
bindTo(element) {
element.addEventListener("touchmove", this.onTouchMove.bind(this));
element.addEventListener("touchend", this.onTouchEnd.bind(this));
element.addEventListener("touchstart", this.onTouchStart.bind(this));
}
onTouchMove({ touches }) {
const targetTouch = touches[0];
this.ongoingTouches[targetTouch.identifier].hasMoved = true;
this.currentMoveX = targetTouch.clientX;
this.currentMoveY = targetTouch.clientY;
// When ending a touch and starting a new one in another part of the touchpad,
// the cursor "rubber bands" to that position.
// To solve this, the "last move" parameters are reset when a touch is ended
// (see onTouchEnd())
if (this.shouldResetLastMove) {
this.shouldResetLastMove = false;
this.lastMoveX = this.currentMoveX;
this.lastMoveY = this.currentMoveY;
}
const deltaX = this.currentMoveX - this.lastMoveX;
const deltaY = this.currentMoveY - this.lastMoveY;
this.lastMoveX = this.currentMoveX;
this.lastMoveY = this.currentMoveY;
this._sendRelativeMouseMovement(deltaX, deltaY);
}
onTouchEnd({ changedTouches }) {
this.shouldResetLastMove = true;
// A single tap = left click
if (changedTouches.length === 1 && !this.ongoingTouches[changedTouches[0].identifier].hasMoved)
this._sendSingleClick("left");
for (let i = 0; i < changedTouches.length; i++) {
const touch = changedTouches[i];
this.ongoingTouches[touch.identifier] = null;
delete this.ongoingTouches[touch.identifier];
}
}
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onTouchStart({ changedTouches }) {
for (let i = 0; i < changedTouches.length; i++) {
const touch = changedTouches[i];
this.ongoingTouches[touch.identifier] = {
identifier: touch.identifier,
clientX: touch.clientX,
clientY: touch.clientY,
hasMoved: false
};
}
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}
}
const connection = new Connection(`ws://${location.host}/gateway`, true);
const controller = new TouchpadController(connection);
function main() {
connection.connect();
controller.bindTo(document.querySelector(".touchpad"));
}
</script>
<style>
.touchpad {
width: 75vw;
height: 50vh;
background-color: blue;
}
</style>
</head>
<body onload="main();">
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<div class="touchpad"></div>
</body>
</html>