From f74458cc5c1d9664306c55fbc10b8f687a055114 Mon Sep 17 00:00:00 2001
From: Double-X <lkllun@yahoo.com.hk>
Date: Thu, 18 Jun 2020 17:12:00 +0800
Subject: [PATCH] Adds a function to check if a key's just released

Added this._isReleased = {}; in Input.clear

Added the following in Input.update:
else if (this._previousState[name] && !this._currentState[name]) {
    this._isReleased[name] = true;
} else {
    this._isReleased[name] = false;
}
Right after:
if (this._currentState[name] && !this._previousState[name]) {
    this._latestButton = name;
    this._pressedTime = 0;
    this._date = Date.now();
}

Added Input.isReleased
---
 js/rpg_core/Input.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/js/rpg_core/Input.js b/js/rpg_core/Input.js
index 9c305c59..a4acf903 100644
--- a/js/rpg_core/Input.js
+++ b/js/rpg_core/Input.js
@@ -108,6 +108,7 @@ Input.clear = function() {
     this._dir8 = 0;
     this._preferredAxis = '';
     this._date = 0;
+    this._isReleased = {};
 };
 
 /**
@@ -128,12 +129,32 @@ Input.update = function() {
             this._latestButton = name;
             this._pressedTime = 0;
             this._date = Date.now();
+        } else if (this._previousState[name] && !this._currentState[name]) {
+            this._isReleased[name] = true;
+        } else {
+            this._isReleased[name] = false;
         }
         this._previousState[name] = this._currentState[name];
     }
     this._updateDirection();
 };
 
+/**
+ * Checks whether a key is just released.
+ *
+ * @static
+ * @method isTriggered
+ * @param {String} keyName The mapped name of the key
+ * @return {Boolean} True if the key is released
+ */
+Input.isReleased = function(keyName) {
+    if (this._isEscapeCompatible(keyName) && this.isTriggered('escape')) {
+        return true;
+    } else {
+        return !!this._isReleased[keyName];
+    }
+};
+
 /**
  * Checks whether a key is currently pressed down.
  *