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File:C:/xampp/phpMyAdmin/js/vendor/jquery/jquery.event.drag-2.2.js

/*!
 * jquery.event.drag - v 2.2
 * Copyright (c) 2010 Three Dub Media - http://threedubmedia.com
 * Open Source MIT License - http://threedubmedia.com/code/license
 */
// Created: 2008-06-04
// Updated: 2012-05-21
// REQUIRES: jquery 1.7.x

;(function( $ ){
  // add the jquery instance method
  $.fn.drag = function( str, arg, opts ){
  	// figure out the event type
  	var type = typeof str == "string" ? str : "",
  	// figure out the event handler...
  	fn = $.isFunction( str ) ? str : $.isFunction( arg ) ? arg : null;
  	// fix the event type
  	if ( type.indexOf("drag") !== 0 )
  		type = "drag"+ type;
  	// were options passed
  	opts = ( str == fn ? arg : opts ) || {};
  	// trigger or bind event handler
  	return fn ? this.bind( type, opts, fn ) : this.trigger( type );
  };

  // local refs (increase compression)
  var $event = $.event,
  $special = $event.special,
  // configure the drag special event
  drag = $special.drag = {

  	// these are the default settings
  	defaults: {
  		which: 1, // mouse button pressed to start drag sequence
  		distance: 0, // distance dragged before dragstart
  		not: ':input', // selector to suppress dragging on target elements
  		handle: null, // selector to match handle target elements
  		relative: false, // true to use "position", false to use "offset"
  		drop: true, // false to suppress drop events, true or selector to allow
  		click: false // false to suppress click events after dragend (no proxy)
  	},

  	// the key name for stored drag data
  	datakey: "dragdata",

  	// prevent bubbling for better performance
  	noBubble: true,

  	// count bound related events
  	add: function( obj ){
  		// read the interaction data
  		var data = $.data( this, drag.datakey ),
  		// read any passed options
  		opts = obj.data || {};
  		// count another realted event
  		data.related += 1;
  		// extend data options bound with this event
  		// don't iterate "opts" in case it is a node
  		$.each( drag.defaults, function( key, def ){
  			if ( opts[ key ] !== undefined )
  				data[ key ] = opts[ key ];
  		});
  	},

  	// forget unbound related events
  	remove: function(){
  		$.data( this, drag.datakey ).related -= 1;
  	},

  	// configure interaction, capture settings
  	setup: function(){
  		// check for related events
  		if ( $.data( this, drag.datakey ) )
  			return;
  		// initialize the drag data with copied defaults
  		var data = $.extend({ related:0 }, drag.defaults );
  		// store the interaction data
  		$.data( this, drag.datakey, data );
  		// bind the mousedown event, which starts drag interactions
  		$event.add( this, "touchstart mousedown", drag.init, data );
  		// prevent image dragging in IE...
  		if ( this.attachEvent )
  			this.attachEvent("ondragstart", drag.dontstart );
  	},

  	// destroy configured interaction
  	teardown: function(){
  		var data = $.data( this, drag.datakey ) || {};
  		// check for related events
  		if ( data.related )
  			return;
  		// remove the stored data
  		$.removeData( this, drag.datakey );
  		// remove the mousedown event
  		$event.remove( this, "touchstart mousedown", drag.init );
  		// enable text selection
  		drag.textselect( true );
  		// un-prevent image dragging in IE...
  		if ( this.detachEvent )
  			this.detachEvent("ondragstart", drag.dontstart );
  	},

  	// initialize the interaction
  	init: function( event ){
  		// sorry, only one touch at a time
  		if ( drag.touched )
  			return;
  		// the drag/drop interaction data
  		var dd = event.data, results;
  		// check the which directive
  		if ( event.which != 0 && dd.which > 0 && event.which != dd.which )
  			return;
  		// check for suppressed selector
  		if ( $( event.target ).is( dd.not ) )
  			return;
  		// check for handle selector
  		if ( dd.handle && !$( event.target ).closest( dd.handle, event.currentTarget ).length )
  			return;

  		drag.touched = event.type == 'touchstart' ? this : null;
  		dd.propagates = 1;
  		dd.mousedown = this;
  		dd.interactions = [ drag.interaction( this, dd ) ];
  		dd.target = event.target;
  		dd.pageX = event.pageX;
  		dd.pageY = event.pageY;
  		dd.dragging = null;
  		// handle draginit event...
  		results = drag.hijack( event, "draginit", dd );
  		// early cancel
  		if ( !dd.propagates )
  			return;
  		// flatten the result set
  		results = drag.flatten( results );
  		// insert new interaction elements
  		if ( results && results.length ){
  			dd.interactions = [];
  			$.each( results, function(){
  				dd.interactions.push( drag.interaction( this, dd ) );
  			});
  		}
  		// remember how many interactions are propagating
  		dd.propagates = dd.interactions.length;
  		// locate and init the drop targets
  		if ( dd.drop !== false && $special.drop )
  			$special.drop.handler( event, dd );
  		// disable text selection
  		drag.textselect( false );
  		// bind additional events...
  		if ( drag.touched )
  			$event.add( drag.touched, "touchmove touchend", drag.handler, dd );
  		else
  			$event.add( document, "mousemove mouseup", drag.handler, dd );
  		// helps prevent text selection or scrolling
  		if ( !drag.touched || dd.live )
  			return false;
  	},

  	// returns an interaction object
  	interaction: function( elem, dd ){
  		var offset = $( elem )[ dd.relative ? "position" : "offset" ]() || { top:0, left:0 };
  		return {
  			drag: elem,
  			callback: new drag.callback(),
  			droppable: [],
  			offset: offset
  		};
  	},

  	// handle drag-releatd DOM events
  	handler: function( event ){
  		// read the data before hijacking anything
  		var dd = event.data;
  		// handle various events
  		switch ( event.type ){
  			// mousemove, check distance, start dragging
  			case !dd.dragging && 'touchmove':
  				event.preventDefault();
  			case !dd.dragging && 'mousemove':
  				//  drag tolerance, x� + y� = distance�
  				if ( Math.pow(  event.pageX-dd.pageX, 2 ) + Math.pow(  event.pageY-dd.pageY, 2 ) < Math.pow( dd.distance, 2 ) )
  					break; // distance tolerance not reached
  				event.target = dd.target; // force target from "mousedown" event (fix distance issue)
  				drag.hijack( event, "dragstart", dd ); // trigger "dragstart"
  				if ( dd.propagates ) // "dragstart" not rejected
  					dd.dragging = true; // activate interaction
  			// mousemove, dragging
  			case 'touchmove':
  				event.preventDefault();
  			case 'mousemove':
  				if ( dd.dragging ){
  					// trigger "drag"
  					drag.hijack( event, "drag", dd );
  					if ( dd.propagates ){
  						// manage drop events
  						if ( dd.drop !== false && $special.drop )
  							$special.drop.handler( event, dd ); // "dropstart", "dropend"
  						break; // "drag" not rejected, stop
  					}
  					event.type = "mouseup"; // helps "drop" handler behave
  				}
  			// mouseup, stop dragging
  			case 'touchend':
  			case 'mouseup':
  			default:
  				if ( drag.touched )
  					$event.remove( drag.touched, "touchmove touchend", drag.handler ); // remove touch events
  				else
  					$event.remove( document, "mousemove mouseup", drag.handler ); // remove page events
  				if ( dd.dragging ){
  					if ( dd.drop !== false && $special.drop )
  						$special.drop.handler( event, dd ); // "drop"
  					drag.hijack( event, "dragend", dd ); // trigger "dragend"
  				}
  				drag.textselect( true ); // enable text selection
  				// if suppressing click events...
  				if ( dd.click === false && dd.dragging )
  					$.data( dd.mousedown, "suppress.click", new Date().getTime() + 5 );
  				dd.dragging = drag.touched = false; // deactivate element
  				break;
  		}
  	},

  	// re-use event object for custom events
  	hijack: function( event, type, dd, x, elem ){
  		// not configured
  		if ( !dd )
  			return;
  		// remember the original event and type
  		var orig = { event:event.originalEvent, type:event.type },
  		// is the event drag related or drog related?
  		mode = type.indexOf("drop") ? "drag" : "drop",
  		// iteration vars
  		result, i = x || 0, ia, $elems, callback,
  		len = !isNaN( x ) ? x : dd.interactions.length;
  		// modify the event type
  		event.type = type;
  		// remove the original event
  		event.originalEvent = null;
  		// initialize the results
  		dd.results = [];
  		// handle each interacted element
  		do if ( ia = dd.interactions[ i ] ){
  			// validate the interaction
  			if ( type !== "dragend" && ia.cancelled )
  				continue;
  			// set the dragdrop properties on the event object
  			callback = drag.properties( event, dd, ia );
  			// prepare for more results
  			ia.results = [];
  			// handle each element
  			$( elem || ia[ mode ] || dd.droppable ).each(function( p, subject ){
  				// identify drag or drop targets individually
  				callback.target = subject;
  				// force propagtion of the custom event
  				event.isPropagationStopped = function(){ return false; };
  				// handle the event
  				result = subject ? $event.dispatch.call( subject, event, callback ) : null;
  				// stop the drag interaction for this element
  				if ( result === false ){
  					if ( mode == "drag" ){
  						ia.cancelled = true;
  						dd.propagates -= 1;
  					}
  					if ( type == "drop" ){
  						ia[ mode ][p] = null;
  					}
  				}
  				// assign any dropinit elements
  				else if ( type == "dropinit" )
  					ia.droppable.push( drag.element( result ) || subject );
  				// accept a returned proxy element
  				if ( type == "dragstart" )
  					ia.proxy = $( drag.element( result ) || ia.drag )[0];
  				// remember this result
  				ia.results.push( result );
  				// forget the event result, for recycling
  				delete event.result;
  				// break on cancelled handler
  				if ( type !== "dropinit" )
  					return result;
  			});
  			// flatten the results
  			dd.results[ i ] = drag.flatten( ia.results );
  			// accept a set of valid drop targets
  			if ( type == "dropinit" )
  				ia.droppable = drag.flatten( ia.droppable );
  			// locate drop targets
  			if ( type == "dragstart" && !ia.cancelled )
  				callback.update();
  		}
  		while ( ++i < len )
  		// restore the original event & type
  		event.type = orig.type;
  		event.originalEvent = orig.event;
  		// return all handler results
  		return drag.flatten( dd.results );
  	},

  	// extend the callback object with drag/drop properties...
  	properties: function( event, dd, ia ){
  		var obj = ia.callback;
  		// elements
  		obj.drag = ia.drag;
  		obj.proxy = ia.proxy || ia.drag;
  		// starting mouse position
  		obj.startX = dd.pageX;
  		obj.startY = dd.pageY;
  		// current distance dragged
  		obj.deltaX = event.pageX - dd.pageX;
  		obj.deltaY = event.pageY - dd.pageY;
  		// original element position
  		obj.originalX = ia.offset.left;
  		obj.originalY = ia.offset.top;
  		// adjusted element position
  		obj.offsetX = obj.originalX + obj.deltaX;
  		obj.offsetY = obj.originalY + obj.deltaY;
  		// assign the drop targets information
  		obj.drop = drag.flatten( ( ia.drop || [] ).slice() );
  		obj.available = drag.flatten( ( ia.droppable || [] ).slice() );
  		return obj;
  	},

  	// determine is the argument is an element or jquery instance
  	element: function( arg ){
  		if ( arg && ( arg.jquery || arg.nodeType == 1 ) )
  			return arg;
  	},

  	// flatten nested jquery objects and arrays into a single dimension array
  	flatten: function( arr ){
  		return $.map( arr, function( member ){
  			return member && member.jquery ? $.makeArray( member ) :
  				member && member.length ? drag.flatten( member ) : member;
  		});
  	},

  	// toggles text selection attributes ON (true) or OFF (false)
  	textselect: function( bool ){
  		$( document )[ bool ? "unbind" : "bind" ]("selectstart", drag.dontstart )
  			.css("MozUserSelect", bool ? "" : "none" );
  		// .attr("unselectable", bool ? "off" : "on" )
  		document.unselectable = bool ? "off" : "on";
  	},

  	// suppress "selectstart" and "ondragstart" events
  	dontstart: function(){
  		return false;
  	},

  	// a callback instance contructor
  	callback: function(){}

  };

  // callback methods
  drag.callback.prototype = {
  	update: function(){
  		if ( $special.drop && this.available.length )
  			$.each( this.available, function( i ){
  				$special.drop.locate( this, i );
  			});
  	}
  };

  // patch $.event.$dispatch to allow suppressing clicks
  var $dispatch = $event.dispatch;
  $event.dispatch = function( event ){
  	if ( $.data( this, "suppress."+ event.type ) - new Date().getTime() > 0 ){
  		$.removeData( this, "suppress."+ event.type );
  		return;
  	}
  	return $dispatch.apply( this, arguments );
  };

  // event fix hooks for touch events...
  var touchHooks =
  $event.fixHooks.touchstart =
  $event.fixHooks.touchmove =
  $event.fixHooks.touchend =
  $event.fixHooks.touchcancel = {
  	props: "clientX clientY pageX pageY screenX screenY".split( " " ),
  	filter: function( event, orig ) {
  		if ( orig ){
  			var touched = ( orig.touches && orig.touches[0] )
  				|| ( orig.changedTouches && orig.changedTouches[0] )
  				|| null;
  			// iOS webkit: touchstart, touchmove, touchend
  			if ( touched )
  				$.each( touchHooks.props, function( i, prop ){
  					event[ prop ] = touched[ prop ];
  				});
  		}
  		return event;
  	}
  };

  // share the same special event configuration with related events...
  $special.draginit = $special.dragstart = $special.dragend = drag;
})( jQuery );

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