Initial commit moving from jQuery UI repo

Author: kborchers

pointer.js

@@ -0,0 +1,138 @@
+(function( $ ) {
+var eventName, lastTouch,
+	POINTER_TYPE_UNAVAILABLE = "",
+	POINTER_TYPE_TOUCH = "touch",
+	POINTER_TYPE_PEN = "pen",
+	POINTER_TYPE_MOUSE = "mouse",
+	eventMap = (function() {
+		if ( "MSPointerEvent" in window ) {
+			return {
+				pointerdown: "MSPointerDown",
+				pointerup: "MSPointerUp",
+				pointermove: "MSPointerMove MSPointerHover",
+				pointercancel: "MSPointerCancel",
+				pointerover: "MSPointerOver",
+				pointerout: "MSPointerOut"
+			};
+		}
+
+		return {
+			pointerdown: "touchstart mousedown",
+			pointerup: "touchend mouseup",
+			pointermove: "touchmove mousemove",
+			pointercancel: "touchcancel",
+			pointerover: "mouseover",
+			pointerout: "mouseout"
+		};
+	})();
+
+function processEvent( event, pointerType ) {
+	var propLength, touch,
+		i = 0,
+		orig = event,
+		mouseProps = $.event.mouseHooks.props;
+
+	event = $.Event( pointerType, {
+		bubbles: true,
+		cancelable: true,
+		pointerId: 0,
+		width: 0,
+		height: 0,
+		pressure: 0,
+		tiltX: 0,
+		tiltY: 0,
+		pointerType: "",
+		isPrimary: false
+	});
+
+	if ( orig.type.indexOf("mouse") !== -1 ) {
+		for ( propLength = mouseProps.length; i < propLength; i++ ) {
+			event[ mouseProps[ i ] ] = orig[ mouseProps[ i ] ];
+		}
+
+		event.pointerId = 1;
+		event.pointerType = POINTER_TYPE_MOUSE;
+		event.isPrimary = true;
+		event.button = event.button !== undefined ? event.button : -1,
+		event.buttons = event.buttons !== undefined ? event.buttons : 0,
+		event.pressure = event.buttons > 0 ? 0.5 : 0;
+	} else if ( orig.type.indexOf("touch") !== -1 ) {
+		touch = orig.originalEvent.changedTouches[ 0 ];
+		event.pageX = touch.pageX;
+		event.pageY = touch.pageY;
+		event.screenX = touch.screenX;
+		event.screenY = touch.screenY;
+		event.clientX = touch.clientX;
+		event.clientY = touch.clientY;
+		event.pointerId = touch.identifier;
+		event.pointerType = POINTER_TYPE_TOUCH;
+		event.button = 0;
+		event.buttons = 1;
+		event.pressure = 0.5;
+		event.originalEvent = orig;
+		// TODO: Properly determine primary pointer
+		event.isPrimary = true;
+	} else if ( orig.type.indexOf("Pointer") !== -1 ) {
+		event.pointerId = orig.originalEvent.pointerId;
+		event.pointerType = processMSPointerType( orig.originalEvent.pointerType );
+		event.button = orig.originalEvent.button;
+		event.buttons = event.pointerType === POINTER_TYPE_TOUCH ? 1 : orig.originalEvent.buttons;
+		event.width = orig.originalEvent.width;
+		event.height = orig.originalEvent.height;
+		event.pressure = orig.originalEvent.pressure;
+		event.tiltX = orig.originalEvent.tiltX;
+		event.tiltY = orig.originalEvent.tiltY;
+		event.pageX = orig.originalEvent.pageX;
+		event.pageY = orig.originalEvent.pageY;
+		event.screenX = orig.originalEvent.screenX;
+		event.screenY = orig.originalEvent.screenY;
+		event.clientX = orig.originalEvent.clientX;
+		event.clientY = orig.originalEvent.clientY;
+		event.isPrimary = orig.originalEvent.isPrimary;
+	}
+
+	return event;
+}
+
+function processMSPointerType( type ) {
+	if ( type === 2 ) {
+		return POINTER_TYPE_TOUCH;
+	} else if ( type === 3 ) {
+		return POINTER_TYPE_PEN;
+	} else if ( type === 4 ) {
+		return POINTER_TYPE_MOUSE;
+	} else {
+		return POINTER_TYPE_UNAVAILABLE;
+	}
+}
+
+function createSpecialEvent( eventName ) {
+	$.event.special[ eventName ] = {
+		setup: function() {
+			$( this ).on( eventMap[ eventName ], $.event.special[ eventName ].handler );
+		},
+		teardown: function() {
+			$( this ).off( eventMap[ eventName ], $.event.special[ eventName ].handler );
+		},
+		handler: function( event ) {
+			if ( !lastTouch || event.type.indexOf("touch") !== -1 ||
+					( event.type.indexOf("mouse") !== -1 && event.timestamp - lastTouch.timestamp > 1000 ) ) {
+				if ( event.type.indexOf("touch") !== -1 ) {
+					lastTouch = event;
+				}
+				if ( eventName === "pointerdown" && event.type.indexOf("touch") !== -1 ) {
+					$( event.target ).trigger( processEvent( event, "pointerover" ) );
+				}
+				$( event.target ).trigger( processEvent( event, eventName ) );
+				if ( eventName === "pointerup" && event.type.indexOf("touch") !== -1 ) {
+					$( event.target ).trigger( processEvent( event, "pointerout" ) );
+				}
+			}
+		}
+	};
+}
+
+for ( eventName in eventMap ) {
+	createSpecialEvent( eventName );
+}
+})( jQuery );