Current state

public/legacy/assets/plugins/jstree/dist/libs/jquery.ui.touch.js

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+/**
+* jQuery.UI.iPad plugin
+* Copyright (c) 2010 Stephen von Takach
+* licensed under MIT.
+* Date: 27/8/2010
+*
+* Project Home:
+* http://code.google.com/p/jquery-ui-for-ipad-and-iphone/
+*
+* Modified: 19/01/2012
+* Organized as a proper plugin and added addTouch()
+*/
+(function ($) {
+	var lastTap = null,				// Holds last tapped element (so we can compare for double tap)
+		tapValid = false,			// Are we still in the .6 second window where a double tap can occur
+		tapTimeout = null,			// The timeout reference
+		rightClickPending = false,	// Is a right click still feasible
+		rightClickEvent = null,		// the original event
+		holdTimeout = null,			// timeout reference
+		cancelMouseUp = false,		// prevents a click from occurring as we want the context menu
+		currentDOMElement = null;	// the last DOM element that was seen during a drag.
+
+	function cancelTap() {
+		tapValid = false;
+	}
+	
+	function cancelHold() {
+		if (rightClickPending) {
+			window.clearTimeout(holdTimeout);
+			rightClickPending = false;
+			rightClickEvent = null;
+		}
+	}
+	
+	function startHold(event) {
+		if (rightClickPending) {
+			return;
+		}
+		rightClickPending = true; // We could be performing a right click
+		rightClickEvent = (event.changedTouches)[0];
+		holdTimeout = window.setTimeout(doRightClick, 800);
+	}
+
+	function doRightClick() {
+		rightClickPending = false;
+		// We need to mouse up (as we were down)
+		var first = rightClickEvent,
+			simulatedEvent = document.createEvent("MouseEvent");
+		simulatedEvent.initMouseEvent("mouseup", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		// Emulate a right click
+		simulatedEvent = document.createEvent("MouseEvent");
+		simulatedEvent.initMouseEvent("mousedown", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 2, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		// Show a context menu
+		simulatedEvent = document.createEvent("MouseEvent");
+		simulatedEvent.initMouseEvent("contextmenu", true, true, window, 1, first.screenX + 50, first.screenY + 5, first.clientX + 50, first.clientY + 5, false, false, false, false, 2, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		simulatedEvent = document.createEvent("MouseEvent");
+		simulatedEvent.initMouseEvent("mouseup", true, true, window, 1, first.screenX + 50, first.screenY + 5, first.clientX + 50, first.clientY + 5, false, false, false, false, 2, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		cancelMouseUp = true;
+		rightClickEvent = null; // Release memory
+	}
+
+
+	// mouse over event then mouse down
+	function iPadTouchStart(event) {
+		var touches = event.changedTouches,
+			first = touches[0],
+			type = "mouseover",
+			simulatedEvent = document.createEvent("MouseEvent");
+
+		// Mouse over first - I have live events attached on mouse over
+		simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		type = "mousedown";
+		simulatedEvent = document.createEvent("MouseEvent");
+
+		simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0, null);
+		first.target.dispatchEvent(simulatedEvent);
+
+		if (!tapValid) {
+			lastTap = first.target;
+			tapValid = true;
+			tapTimeout = window.setTimeout(cancelTap, 600);
+			startHold(event);
+		} else {
+			window.clearTimeout(tapTimeout);
+			// If a double tap is still a possibility and the elements are the same then perform a double click
+			if (first.target == lastTap) {
+				lastTap = null;
+				tapValid = false;
+
+				type = "click";
+				simulatedEvent = document.createEvent("MouseEvent");
+
+				simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0, null);
+				first.target.dispatchEvent(simulatedEvent);
+
+				type = "dblclick";
+				simulatedEvent = document.createEvent("MouseEvent");
+
+				simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY, false, false, false, false, 0, null);
+				first.target.dispatchEvent(simulatedEvent);
+			} else {
+				lastTap = first.target;
+				tapValid = true;
+				tapTimeout = window.setTimeout(cancelTap, 600);
+				startHold(event);
+			}
+		}
+	}
+
+	function getDOMElementFromEvent(event) {
+		if (event.targetTouches && event.targetTouches[0]) {
+			return document.elementFromPoint(event.targetTouches[0].pageX - window.pageXOffset, event.targetTouches[0].pageY - window.pageYOffset);
+		}
+		return null;
+	}
+
+	function iPadTouchHandler(event) {
+		var type = "",
+			button = 0; /*left*/
+		if (event.touches.length > 1) {
+			return;
+		}
+		switch (event.type) {
+		case "touchstart":
+			if ($(event.changedTouches[0].target).is("select")) {
+				return;
+			}
+			iPadTouchStart(event); /*We need to trigger two events here to support one touch drag and drop*/
+			event.preventDefault();
+			currentDOMElement = getDOMElementFromEvent(event);
+			return false;
+
+		case "touchmove":
+			cancelHold();
+			type = "mousemove";
+			event.preventDefault();
+
+			currentDOMElement = getDOMElementFromEvent(event);
+			break;
+
+		case "touchend":
+			if (cancelMouseUp) {
+				cancelMouseUp = false;
+				event.preventDefault();
+				return false;
+			}
+			cancelHold();
+			type = "mouseup";
+			break;
+
+		default:
+			return;
+		}
+		var touches = event.changedTouches,
+			first = touches[0],
+			simulatedEvent = document.createEvent("MouseEvent");
+		simulatedEvent.initMouseEvent(type, true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,false, false, false, false, button, null);
+		currentDOMElement.dispatchEvent(simulatedEvent);
+		if (type == "mouseup" && tapValid && first.target == lastTap) {	// This actually emulates the ipad's default behavior (which we prevented)
+			simulatedEvent = document.createEvent("MouseEvent");		// This check avoids click being emulated on a double tap
+			simulatedEvent.initMouseEvent("click", true, true, window, 1, first.screenX, first.screenY, first.clientX, first.clientY,false, false, false, false, button, null);
+			currentDOMElement.dispatchEvent(simulatedEvent);
+		}
+	}
+	
+	$.extend($.support, {
+		touch: "ontouchend" in document
+	});
+
+	$.fn.addTouch = function () {
+		if ($.support.touch) {
+			this.each(function (i, el) {
+				el.addEventListener("touchstart", iPadTouchHandler, false);
+				el.addEventListener("touchmove", iPadTouchHandler, false);
+				el.addEventListener("touchend", iPadTouchHandler, false);
+				el.addEventListener("touchcancel", iPadTouchHandler, false);
+			});
+		}
+		return this;
+	};
+
+})(jQuery);