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droppable.js (12817B)

---

 /*!
  * jQuery UI Droppable 1.12.1
  * http://jqueryui.com
  *
  * Copyright jQuery Foundation and other contributors
  * Released under the MIT license.
  * http://jquery.org/license
  */
 
 //>>label: Droppable
 //>>group: Interactions
 //>>description: Enables drop targets for draggable elements.
 //>>docs: http://api.jqueryui.com/droppable/
 //>>demos: http://jqueryui.com/droppable/
 
 ( function( factory ) {
 	if ( typeof define === "function" && define.amd ) {
 
 		// AMD. Register as an anonymous module.
 		define( [
 			"jquery",
 			"./draggable",
 			"./mouse",
 			"./core"
 		], factory );
 	} else {
 
 		// Browser globals
 		factory( jQuery );
 	}
 }( function( $ ) {
 
 $.widget( "ui.droppable", {
 	version: "1.12.1",
 	widgetEventPrefix: "drop",
 	options: {
 		accept: "*",
 		addClasses: true,
 		greedy: false,
 		scope: "default",
 		tolerance: "intersect",
 
 		// Callbacks
 		activate: null,
 		deactivate: null,
 		drop: null,
 		out: null,
 		over: null
 	},
 	_create: function() {
 
 		var proportions,
 			o = this.options,
 			accept = o.accept;
 
 		this.isover = false;
 		this.isout = true;
 
 		this.accept = $.isFunction( accept ) ? accept : function( d ) {
 			return d.is( accept );
 		};
 
 		this.proportions = function( /* valueToWrite */ ) {
 			if ( arguments.length ) {
 
 				// Store the droppable's proportions
 				proportions = arguments[ 0 ];
 			} else {
 
 				// Retrieve or derive the droppable's proportions
 				return proportions ?
 					proportions :
 					proportions = {
 						width: this.element[ 0 ].offsetWidth,
 						height: this.element[ 0 ].offsetHeight
 					};
 			}
 		};
 
 		this._addToManager( o.scope );
 
 		o.addClasses && this._addClass( "ui-droppable" );
 
 	},
 
 	_addToManager: function( scope ) {
 
 		// Add the reference and positions to the manager
 		$.ui.ddmanager.droppables[ scope ] = $.ui.ddmanager.droppables[ scope ] || [];
 		$.ui.ddmanager.droppables[ scope ].push( this );
 	},
 
 	_splice: function( drop ) {
 		var i = 0;
 		for ( ; i < drop.length; i++ ) {
 			if ( drop[ i ] === this ) {
 				drop.splice( i, 1 );
 			}
 		}
 	},
 
 	_destroy: function() {
 		var drop = $.ui.ddmanager.droppables[ this.options.scope ];
 
 		this._splice( drop );
 	},
 
 	_setOption: function( key, value ) {
 
 		if ( key === "accept" ) {
 			this.accept = $.isFunction( value ) ? value : function( d ) {
 				return d.is( value );
 			};
 		} else if ( key === "scope" ) {
 			var drop = $.ui.ddmanager.droppables[ this.options.scope ];
 
 			this._splice( drop );
 			this._addToManager( value );
 		}
 
 		this._super( key, value );
 	},
 
 	_activate: function( event ) {
 		var draggable = $.ui.ddmanager.current;
 
 		this._addActiveClass();
 		if ( draggable ) {
 			this._trigger( "activate", event, this.ui( draggable ) );
 		}
 	},
 
 	_deactivate: function( event ) {
 		var draggable = $.ui.ddmanager.current;
 
 		this._removeActiveClass();
 		if ( draggable ) {
 			this._trigger( "deactivate", event, this.ui( draggable ) );
 		}
 	},
 
 	_over: function( event ) {
 
 		var draggable = $.ui.ddmanager.current;
 
 		// Bail if draggable and droppable are same element
 		if ( !draggable || ( draggable.currentItem ||
 				draggable.element )[ 0 ] === this.element[ 0 ] ) {
 			return;
 		}
 
 		if ( this.accept.call( this.element[ 0 ], ( draggable.currentItem ||
 				draggable.element ) ) ) {
 			this._addHoverClass();
 			this._trigger( "over", event, this.ui( draggable ) );
 		}
 
 	},
 
 	_out: function( event ) {
 
 		var draggable = $.ui.ddmanager.current;
 
 		// Bail if draggable and droppable are same element
 		if ( !draggable || ( draggable.currentItem ||
 				draggable.element )[ 0 ] === this.element[ 0 ] ) {
 			return;
 		}
 
 		if ( this.accept.call( this.element[ 0 ], ( draggable.currentItem ||
 				draggable.element ) ) ) {
 			this._removeHoverClass();
 			this._trigger( "out", event, this.ui( draggable ) );
 		}
 
 	},
 
 	_drop: function( event, custom ) {
 
 		var draggable = custom || $.ui.ddmanager.current,
 			childrenIntersection = false;
 
 		// Bail if draggable and droppable are same element
 		if ( !draggable || ( draggable.currentItem ||
 				draggable.element )[ 0 ] === this.element[ 0 ] ) {
 			return false;
 		}
 
 		this.element
 			.find( ":data(ui-droppable)" )
 			.not( ".ui-draggable-dragging" )
 			.each( function() {
 				var inst = $( this ).droppable( "instance" );
 				if (
 					inst.options.greedy &&
 					!inst.options.disabled &&
 					inst.options.scope === draggable.options.scope &&
 					inst.accept.call(
 						inst.element[ 0 ], ( draggable.currentItem || draggable.element )
 					) &&
 					intersect(
 						draggable,
 						$.extend( inst, { offset: inst.element.offset() } ),
 						inst.options.tolerance, event
 					)
 				) {
 					childrenIntersection = true;
 					return false; }
 			} );
 		if ( childrenIntersection ) {
 			return false;
 		}
 
 		if ( this.accept.call( this.element[ 0 ],
 				( draggable.currentItem || draggable.element ) ) ) {
 			this._removeActiveClass();
 			this._removeHoverClass();
 
 			this._trigger( "drop", event, this.ui( draggable ) );
 			return this.element;
 		}
 
 		return false;
 
 	},
 
 	ui: function( c ) {
 		return {
 			draggable: ( c.currentItem || c.element ),
 			helper: c.helper,
 			position: c.position,
 			offset: c.positionAbs
 		};
 	},
 
 	// Extension points just to make backcompat sane and avoid duplicating logic
 	// TODO: Remove in 1.13 along with call to it below
 	_addHoverClass: function() {
 		this._addClass( "ui-droppable-hover" );
 	},
 
 	_removeHoverClass: function() {
 		this._removeClass( "ui-droppable-hover" );
 	},
 
 	_addActiveClass: function() {
 		this._addClass( "ui-droppable-active" );
 	},
 
 	_removeActiveClass: function() {
 		this._removeClass( "ui-droppable-active" );
 	}
 } );
 
 var intersect = $.ui.intersect = ( function() {
 	function isOverAxis( x, reference, size ) {
 		return ( x >= reference ) && ( x < ( reference + size ) );
 	}
 
 	return function( draggable, droppable, toleranceMode, event ) {
 
 		if ( !droppable.offset ) {
 			return false;
 		}
 
 		var x1 = ( draggable.positionAbs ||
 				draggable.position.absolute ).left + draggable.margins.left,
 			y1 = ( draggable.positionAbs ||
 				draggable.position.absolute ).top + draggable.margins.top,
 			x2 = x1 + draggable.helperProportions.width,
 			y2 = y1 + draggable.helperProportions.height,
 			l = droppable.offset.left,
 			t = droppable.offset.top,
 			r = l + droppable.proportions().width,
 			b = t + droppable.proportions().height;
 
 		switch ( toleranceMode ) {
 		case "fit":
 			return ( l <= x1 && x2 <= r && t <= y1 && y2 <= b );
 		case "intersect":
 			return ( l < x1 + ( draggable.helperProportions.width / 2 ) && // Right Half
 				x2 - ( draggable.helperProportions.width / 2 ) < r && // Left Half
 				t < y1 + ( draggable.helperProportions.height / 2 ) && // Bottom Half
 				y2 - ( draggable.helperProportions.height / 2 ) < b ); // Top Half
 		case "pointer":
 			return isOverAxis( event.pageY, t, droppable.proportions().height ) &&
 				isOverAxis( event.pageX, l, droppable.proportions().width );
 		case "touch":
 			return (
 				( y1 >= t && y1 <= b ) || // Top edge touching
 				( y2 >= t && y2 <= b ) || // Bottom edge touching
 				( y1 < t && y2 > b ) // Surrounded vertically
 			) && (
 				( x1 >= l && x1 <= r ) || // Left edge touching
 				( x2 >= l && x2 <= r ) || // Right edge touching
 				( x1 < l && x2 > r ) // Surrounded horizontally
 			);
 		default:
 			return false;
 		}
 	};
 } )();
 
 /*
 	This manager tracks offsets of draggables and droppables
 */
 $.ui.ddmanager = {
 	current: null,
 	droppables: { "default": [] },
 	prepareOffsets: function( t, event ) {
 
 		var i, j,
 			m = $.ui.ddmanager.droppables[ t.options.scope ] || [],
 			type = event ? event.type : null, // workaround for #2317
 			list = ( t.currentItem || t.element ).find( ":data(ui-droppable)" ).addBack();
 
 		droppablesLoop: for ( i = 0; i < m.length; i++ ) {
 
 			// No disabled and non-accepted
 			if ( m[ i ].options.disabled || ( t && !m[ i ].accept.call( m[ i ].element[ 0 ],
 					( t.currentItem || t.element ) ) ) ) {
 				continue;
 			}
 
 			// Filter out elements in the current dragged item
 			for ( j = 0; j < list.length; j++ ) {
 				if ( list[ j ] === m[ i ].element[ 0 ] ) {
 					m[ i ].proportions().height = 0;
 					continue droppablesLoop;
 				}
 			}
 
 			m[ i ].visible = m[ i ].element.css( "display" ) !== "none";
 			if ( !m[ i ].visible ) {
 				continue;
 			}
 
 			// Activate the droppable if used directly from draggables
 			if ( type === "mousedown" ) {
 				m[ i ]._activate.call( m[ i ], event );
 			}
 
 			m[ i ].offset = m[ i ].element.offset();
 			m[ i ].proportions( {
 				width: m[ i ].element[ 0 ].offsetWidth,
 				height: m[ i ].element[ 0 ].offsetHeight
 			} );
 
 		}
 
 	},
 	drop: function( draggable, event ) {
 
 		var dropped = false;
 
 		// Create a copy of the droppables in case the list changes during the drop (#9116)
 		$.each( ( $.ui.ddmanager.droppables[ draggable.options.scope ] || [] ).slice(), function() {
 
 			if ( !this.options ) {
 				return;
 			}
 			if ( !this.options.disabled && this.visible &&
 					intersect( draggable, this, this.options.tolerance, event ) ) {
 				dropped = this._drop.call( this, event ) || dropped;
 			}
 
 			if ( !this.options.disabled && this.visible && this.accept.call( this.element[ 0 ],
 					( draggable.currentItem || draggable.element ) ) ) {
 				this.isout = true;
 				this.isover = false;
 				this._deactivate.call( this, event );
 			}
 
 		} );
 		return dropped;
 
 	},
 	dragStart: function( draggable, event ) {
 
 		// Listen for scrolling so that if the dragging causes scrolling the position of the
 		// droppables can be recalculated (see #5003)
 		draggable.element.parentsUntil( "body" ).on( "scroll.droppable", function() {
 			if ( !draggable.options.refreshPositions ) {
 				$.ui.ddmanager.prepareOffsets( draggable, event );
 			}
 		} );
 	},
 	drag: function( draggable, event ) {
 
 		// If you have a highly dynamic page, you might try this option. It renders positions
 		// every time you move the mouse.
 		if ( draggable.options.refreshPositions ) {
 			$.ui.ddmanager.prepareOffsets( draggable, event );
 		}
 
 		// Run through all droppables and check their positions based on specific tolerance options
 		$.each( $.ui.ddmanager.droppables[ draggable.options.scope ] || [], function() {
 
 			if ( this.options.disabled || this.greedyChild || !this.visible ) {
 				return;
 			}
 
 			var parentInstance, scope, parent,
 				intersects = intersect( draggable, this, this.options.tolerance, event ),
 				c = !intersects && this.isover ?
 					"isout" :
 					( intersects && !this.isover ? "isover" : null );
 			if ( !c ) {
 				return;
 			}
 
 			if ( this.options.greedy ) {
 
 				// find droppable parents with same scope
 				scope = this.options.scope;
 				parent = this.element.parents( ":data(ui-droppable)" ).filter( function() {
 					return $( this ).droppable( "instance" ).options.scope === scope;
 				} );
 
 				if ( parent.length ) {
 					parentInstance = $( parent[ 0 ] ).droppable( "instance" );
 					parentInstance.greedyChild = ( c === "isover" );
 				}
 			}
 
 			// We just moved into a greedy child
 			if ( parentInstance && c === "isover" ) {
 				parentInstance.isover = false;
 				parentInstance.isout = true;
 				parentInstance._out.call( parentInstance, event );
 			}
 
 			this[ c ] = true;
 			this[ c === "isout" ? "isover" : "isout" ] = false;
 			this[ c === "isover" ? "_over" : "_out" ].call( this, event );
 
 			// We just moved out of a greedy child
 			if ( parentInstance && c === "isout" ) {
 				parentInstance.isout = false;
 				parentInstance.isover = true;
 				parentInstance._over.call( parentInstance, event );
 			}
 		} );
 
 	},
 	dragStop: function( draggable, event ) {
 		draggable.element.parentsUntil( "body" ).off( "scroll.droppable" );
 
 		// Call prepareOffsets one final time since IE does not fire return scroll events when
 		// overflow was caused by drag (see #5003)
 		if ( !draggable.options.refreshPositions ) {
 			$.ui.ddmanager.prepareOffsets( draggable, event );
 		}
 	}
 };
 
 // DEPRECATED
 // TODO: switch return back to widget declaration at top of file when this is removed
 if ( $.uiBackCompat !== false ) {
 
 	// Backcompat for activeClass and hoverClass options
 	$.widget( "ui.droppable", $.ui.droppable, {
 		options: {
 			hoverClass: false,
 			activeClass: false
 		},
 		_addActiveClass: function() {
 			this._super();
 			if ( this.options.activeClass ) {
 				this.element.addClass( this.options.activeClass );
 			}
 		},
 		_removeActiveClass: function() {
 			this._super();
 			if ( this.options.activeClass ) {
 				this.element.removeClass( this.options.activeClass );
 			}
 		},
 		_addHoverClass: function() {
 			this._super();
 			if ( this.options.hoverClass ) {
 				this.element.addClass( this.options.hoverClass );
 			}
 		},
 		_removeHoverClass: function() {
 			this._super();
 			if ( this.options.hoverClass ) {
 				this.element.removeClass( this.options.hoverClass );
 			}
 		}
 	} );
 }
 
 return $.ui.droppable;
 
 } ) );