From 49d2c554ef5b50cef28c5efb1229593d301526c0 Mon Sep 17 00:00:00 2001
From: Ethan O'Brien <77750390+ethanaobrien@users.noreply.github.com>
Date: Sat, 24 Jun 2023 22:18:12 -0500
Subject: [PATCH] push gamepad script

---
 src/emulator.js |  2 ++
 src/gamepad.js  | 92 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/loader.js   |  1 +
 3 files changed, 95 insertions(+)
 create mode 100644 src/gamepad.js

diff --git a/src/emulator.js b/src/emulator.js
index 932ec23..b7c3be9 100644
--- a/src/emulator.js
+++ b/src/emulator.js
@@ -422,6 +422,7 @@ class EmulatorJS {
         this.createControlSettingMenu();
         this.setVirtualGamepad();
         this.addEventListener(document, "keydown keyup", this.keyChange.bind(this));
+        //this.gamepad = new GamepadHandler(); //https://github.com/ethanaobrien/Gamepad
         //keyboard, etc...
     }
     createContextMenu() {
@@ -893,6 +894,7 @@ class EmulatorJS {
         this.controlPopup = popupMsg;
         popup.appendChild(popupMsg);
         this.controlMenu.appendChild(popup);
+        
     }
     defaultControllers = {
         0: {
diff --git a/src/gamepad.js b/src/gamepad.js
new file mode 100644
index 0000000..02a6b9e
--- /dev/null
+++ b/src/gamepad.js
@@ -0,0 +1,92 @@
+class GamepadHandler {
+    gamepads;
+    timeout;
+    listeners;
+    constructor() {
+        this.gamepads = [];
+        this.listeners = {};
+        this.timeout = null;
+        this.loop();
+    }
+    terminate() {
+        window.clearTimeout(this.timeout);
+    }
+    getGamepads() {
+        return navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads() : []);
+    }
+    loop() {
+        this.updateGamepadState();
+        this.timeout = setTimeout(this.loop.bind(this), 10);
+    }
+    updateGamepadState() {
+        const gamepads = this.getGamepads();
+        gamepads.forEach((gamepad, index) => {
+            if (!gamepad) return;
+            let hasGamepad = false;
+            this.gamepads.forEach((oldGamepad, oldIndex) => {
+                if (oldGamepad.index !== gamepad.index) return;
+                hasGamepad = true;
+                
+                oldGamepad.axes.forEach((axis, axisIndex) => {
+                    if (gamepad.axes[axisIndex] !== axis) {
+                        const axis = ['LEFT_STICK_X', 'LEFT_STICK_Y', 'RIGHT_STICK_X', 'RIGHT_STICK_Y'][axisIndex];
+                        if (!axis) return;
+                        this.dispatchEvent('axischanged', {axis: axis, value: gamepad.axes[axisIndex], index: gamepad.index, gamepadIndex: gamepad.index});
+                    }
+                    
+                })
+                gamepad.buttons.forEach((button, buttonIndex) => {
+                    let pressed = oldGamepad.buttons[buttonIndex] === 1.0;
+                    if (typeof oldGamepad.buttons[buttonIndex] === "object") {
+                        pressed = oldGamepad.buttons[buttonIndex].pressed;
+                    }
+                    let pressed2 = button === 1.0;
+                    if (typeof button === "object") {
+                        pressed2 = button.pressed;
+                    }
+                    if (pressed !== pressed2) {
+                        if (pressed2) {
+                            this.dispatchEvent('buttondown', {index: buttonIndex, gamepadIndex: gamepad.index});
+                        } else {
+                            this.dispatchEvent('buttonup', {index: buttonIndex, gamepadIndex: gamepad.index});
+                        }
+                    }
+                    
+                })
+                this.gamepads[oldIndex] = gamepads[index];
+            })
+            if (!hasGamepad) {
+                this.gamepads.push(gamepads[index]);
+                this.dispatchEvent('connected', {gamepadIndex: gamepad.index});
+            }
+        });
+        
+        for (let j=0; j<this.gamepads.length; j++) {
+            if (!this.gamepads[j]) continue;
+            let has = false;
+            for (let i=0; i<gamepads.length; i++) {
+                if (!gamepads[i]) continue;
+                if (this.gamepads[j].index === gamepads[i].index) {
+                    has = true;
+                    break;
+                }
+            }
+            if (!has) {
+                this.dispatchEvent('disconnected', {gamepadIndex: this.gamepads[j].index});
+                this.gamepads.splice(j, 1);
+                j--;
+            }
+        }
+    }
+    dispatchEvent(name, arg) {
+        if (typeof this.listeners[name] !== 'function') return;
+        if (!arg) arg={};
+        arg.type = name;
+        this.listeners[name](arg);
+    }
+    on(name, cb) {
+        this.listeners[name.toLowerCase()] = cb;
+    }
+}
+
+window.GamepadHandler = GamepadHandler;
\ No newline at end of file
diff --git a/src/loader.js b/src/loader.js
index 50e3bb3..bcf16e1 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -36,6 +36,7 @@
     if (('undefined' != typeof EJS_DEBUG_XX && true === EJS_DEBUG_XX) || true) {
         await loadScript('emulator.js');
         await loadScript('nipplejs.js');
+        await loadScript('gamepad.js');
         await loadScript('GameManager.js');
         await loadStyle('css/main.css');
     }