mirror of
https://github.com/EmulatorJS/EmulatorJS.git
synced 2024-09-20 02:46:23 +00:00
92 lines
3.4 KiB
JavaScript
92 lines
3.4 KiB
JavaScript
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class GamepadHandler {
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gamepads;
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timeout;
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listeners;
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constructor() {
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this.gamepads = [];
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this.listeners = {};
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this.timeout = null;
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this.loop();
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}
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terminate() {
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window.clearTimeout(this.timeout);
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}
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getGamepads() {
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return navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads() : []);
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}
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loop() {
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this.updateGamepadState();
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this.timeout = setTimeout(this.loop.bind(this), 10);
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}
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updateGamepadState() {
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const gamepads = this.getGamepads();
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gamepads.forEach((gamepad, index) => {
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if (!gamepad) return;
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let hasGamepad = false;
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this.gamepads.forEach((oldGamepad, oldIndex) => {
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if (oldGamepad.index !== gamepad.index) return;
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hasGamepad = true;
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oldGamepad.axes.forEach((axis, axisIndex) => {
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if (gamepad.axes[axisIndex] !== axis) {
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const axis = ['LEFT_STICK_X', 'LEFT_STICK_Y', 'RIGHT_STICK_X', 'RIGHT_STICK_Y'][axisIndex];
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if (!axis) return;
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this.dispatchEvent('axischanged', {axis: axis, value: gamepad.axes[axisIndex], index: gamepad.index, gamepadIndex: gamepad.index});
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}
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})
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gamepad.buttons.forEach((button, buttonIndex) => {
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let pressed = oldGamepad.buttons[buttonIndex] === 1.0;
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if (typeof oldGamepad.buttons[buttonIndex] === "object") {
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pressed = oldGamepad.buttons[buttonIndex].pressed;
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}
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let pressed2 = button === 1.0;
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if (typeof button === "object") {
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pressed2 = button.pressed;
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}
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if (pressed !== pressed2) {
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if (pressed2) {
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this.dispatchEvent('buttondown', {index: buttonIndex, gamepadIndex: gamepad.index});
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} else {
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this.dispatchEvent('buttonup', {index: buttonIndex, gamepadIndex: gamepad.index});
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}
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}
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})
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this.gamepads[oldIndex] = gamepads[index];
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})
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if (!hasGamepad) {
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this.gamepads.push(gamepads[index]);
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this.dispatchEvent('connected', {gamepadIndex: gamepad.index});
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}
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});
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for (let j=0; j<this.gamepads.length; j++) {
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if (!this.gamepads[j]) continue;
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let has = false;
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for (let i=0; i<gamepads.length; i++) {
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if (!gamepads[i]) continue;
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if (this.gamepads[j].index === gamepads[i].index) {
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has = true;
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break;
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}
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}
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if (!has) {
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this.dispatchEvent('disconnected', {gamepadIndex: this.gamepads[j].index});
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this.gamepads.splice(j, 1);
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j--;
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}
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}
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}
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dispatchEvent(name, arg) {
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if (typeof this.listeners[name] !== 'function') return;
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if (!arg) arg={};
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arg.type = name;
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this.listeners[name](arg);
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}
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on(name, cb) {
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this.listeners[name.toLowerCase()] = cb;
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}
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}
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window.GamepadHandler = GamepadHandler;
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