contents of zip

scripts/scroll.js

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+// Use strict
+"use strict";
+
+
+// Classes
+
+// Scroll class
+class Scroll {
+
+	// Public
+	
+		// Constructor
+		constructor() {
+		
+			// Set prevent scrolling keys to false
+			this.preventScrollingKeys = false;
+		
+			// Set self
+			var self = this;
+		
+			// Document key down event
+			$(document).on("keydown", function(event) {
+			
+				// Check if preventing scrolling keys and a scroll key was pressed
+				if(self.preventScrollingKeys === true && Scroll.isScrollKey(event["which"]) === true) {
+				
+					// Prevent default
+					event.preventDefault();
+				}
+			
+			// Input blur or mouse out event
+			}).on("blur mouseout", "input", function() {
+			
+				// Get input
+				var input = $(this);
+				
+				// Check if input doesn't have focus
+				if(input.is(":focus") === false) {
+			
+					// Scroll input back to start
+					input.scrollLeft(0);
+				}
+			});
+			
+			// Check if browser isn't Firefox
+			if(typeof navigator !== "object" || navigator === null || "userAgent" in navigator === false || navigator["userAgent"].toLowerCase().indexOf("firefox") === Common.INDEX_NOT_FOUND) {
+			
+				// Scroll event
+				document.addEventListener("scroll", function(event) {
+					
+					// Get element
+					var element = $(event["target"]);
+					
+					// Check if element is an input and it doesn't have focus
+					if(element.is("input") === true && element.is(":focus") === false) {
+					
+						// Prevent scrolling
+						element.scrollLeft(0);
+					}
+				}, true);
+			}
+		}
+		
+		// Prevent keys
+		preventKeys() {
+		
+			// Set prevent scrolling keys
+			this.preventScrollingKeys = true;
+		}
+		
+		// Allow keys
+		allowKeys() {
+		
+			// Clear prevent scrolling keys
+			this.preventScrollingKeys = false;
+		}
+		
+		// Tolerance
+		static get TOLERANCE() {
+		
+			// Return tolerance
+			return 2;
+		}
+	
+	// Private
+	
+		// Is scroll key
+		static isScrollKey(key) {
+		
+			// Return is key is a scroll key
+			return Scroll.SCROLL_KEYS.indexOf(key) !== Common.INDEX_NOT_FOUND;
+		}
+		
+		// Scroll keys
+		static get SCROLL_KEYS() {
+		
+			// Return scroll keys
+			return [
+		
+				// Page up
+				Scroll.PAGE_UP_KEY_CODE,
+				
+				// Page down
+				Scroll.PAGE_DOWN_KEY_CODE,
+				
+				// End
+				Scroll.END_KEY_CODE,
+				
+				// Home
+				Scroll.HOME_KEY_CODE,
+				
+				// Left arrow
+				Scroll.LEFT_ARROW_KEY_CODE,
+				
+				// Up arrow
+				Scroll.UP_ARROW_KEY_CODE,
+				
+				// Right arrow
+				Scroll.RIGHT_ARROW_KEY_CODE,
+				
+				// Down arrow
+				Scroll.DOWN_ARROW_KEY_CODE
+			];
+		}
+		
+		// Page up key code
+		static get PAGE_UP_KEY_CODE() {
+		
+			// Return page up key code
+			return 33;
+		}
+		
+		// Page down key code
+		static get PAGE_DOWN_KEY_CODE() {
+		
+			// Return page down key code
+			return 34;
+		}
+		
+		// End key code
+		static get END_KEY_CODE() {
+		
+			// Return end key code
+			return 35;
+		}
+		
+		// Home key code
+		static get HOME_KEY_CODE() {
+		
+			// Return home key code
+			return 36;
+		}
+		
+		// Left arrow key code
+		static get LEFT_ARROW_KEY_CODE() {
+		
+			// Return left arrow key code
+			return 37;
+		}
+		
+		// Up arrow key code
+		static get UP_ARROW_KEY_CODE() {
+		
+			// Return up arrow key code
+			return 38;
+		}
+		
+		// Right arrow key code
+		static get RIGHT_ARROW_KEY_CODE() {
+		
+			// Return right arrow key code
+			return 39;
+		}
+		
+		// Down arrow key code
+		static get DOWN_ARROW_KEY_CODE() {
+		
+			// Return down arrow key code
+			return 40;
+		}
+}
+
+
+// Main function
+
+// Set global object's scroll
+globalThis["Scroll"] = Scroll;