https://www.firststage.org/cms3t/res/js/jQuery/ui/jquery.ui.droppable.js

1/*
2 * jQuery UI Droppable 1.8.16
3 *
4 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
5 * Dual licensed under the MIT or GPL Version 2 licenses.
6 * http://jquery.org/license
7 *
8 * http://docs.jquery.com/UI/Droppables
9 *
10 * Depends:
11 *	jquery.ui.core.js
12 *	jquery.ui.widget.js
13 *	jquery.ui.mouse.js
14 *	jquery.ui.draggable.js
15 */
16(function( $, undefined ) {
17
18$.widget("ui.droppable", {
19	widgetEventPrefix: "drop",
20	options: {
21		accept: '*',
22		activeClass: false,
23		addClasses: true,
24		greedy: false,
25		hoverClass: false,
26		scope: 'default',
27		tolerance: 'intersect'
28	},
29	_create: function() {
30
31		var o = this.options, accept = o.accept;
32		this.isover = 0; this.isout = 1;
33
34		this.accept = $.isFunction(accept) ? accept : function(d) {
35			return d.is(accept);
36		};
37
38		//Store the droppable's proportions
39		this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
40
41		// Add the reference and positions to the manager
42		$.ui.ddmanager.droppables[o.scope] = $.ui.ddmanager.droppables[o.scope] || [];
43		$.ui.ddmanager.droppables[o.scope].push(this);
44
45		(o.addClasses && this.element.addClass("ui-droppable"));
46
47	},
48
49	destroy: function() {
50		var drop = $.ui.ddmanager.droppables[this.options.scope];
51		for ( var i = 0; i < drop.length; i++ )
52			if ( drop[i] == this )
53				drop.splice(i, 1);
54
55		this.element
56			.removeClass("ui-droppable ui-droppable-disabled")
57			.removeData("droppable")
58			.unbind(".droppable");
59
60		return this;
61	},
62
63	_setOption: function(key, value) {
64
65		if(key == 'accept') {
66			this.accept = $.isFunction(value) ? value : function(d) {
67				return d.is(value);
68			};
69		}
70		$.Widget.prototype._setOption.apply(this, arguments);
71	},
72
73	_activate: function(event) {
74		var draggable = $.ui.ddmanager.current;
75		if(this.options.activeClass) this.element.addClass(this.options.activeClass);
76		(draggable && this._trigger('activate', event, this.ui(draggable)));
77	},
78
79	_deactivate: function(event) {
80		var draggable = $.ui.ddmanager.current;
81		if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
82		(draggable && this._trigger('deactivate', event, this.ui(draggable)));
83	},
84
85	_over: function(event) {
86
87		var draggable = $.ui.ddmanager.current;
88		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
89
90		if (this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
91			if(this.options.hoverClass) this.element.addClass(this.options.hoverClass);
92			this._trigger('over', event, this.ui(draggable));
93		}
94
95	},
96
97	_out: function(event) {
98
99		var draggable = $.ui.ddmanager.current;
100		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
101
102		if (this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
103			if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
104			this._trigger('out', event, this.ui(draggable));
105		}
106
107	},
108
109	_drop: function(event,custom) {
110
111		var draggable = custom || $.ui.ddmanager.current;
112		if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element
113
114		var childrenIntersection = false;
115		this.element.find(":data(droppable)").not(".ui-draggable-dragging").each(function() {
116			var inst = $.data(this, 'droppable');
117			if(
118				inst.options.greedy
119				&& !inst.options.disabled
120				&& inst.options.scope == draggable.options.scope
121				&& inst.accept.call(inst.element[0], (draggable.currentItem || draggable.element))
122				&& $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)
123			) { childrenIntersection = true; return false; }
124		});
125		if(childrenIntersection) return false;
126
127		if(this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
128			if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
129			if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
130			this._trigger('drop', event, this.ui(draggable));
131			return this.element;
132		}
133
134		return false;

135
136	},
137
138	ui: function(c) {
139		return {
140			draggable: (c.currentItem || c.element),
141			helper: c.helper,
142			position: c.position,
143			offset: c.positionAbs
144		};
145	}
146
147});
148
149$.extend($.ui.droppable, {
150	version: "1.8.16"
151});
152
153$.ui.intersect = function(draggable, droppable, toleranceMode) {
154
155	if (!droppable.offset) return false;
156
157	var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
158		y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
159	var l = droppable.offset.left, r = l + droppable.proportions.width,
160		t = droppable.offset.top, b = t + droppable.proportions.height;
161
162	switch (toleranceMode) {
163		case 'fit':
164			return (l <= x1 && x2 <= r
165				&& t <= y1 && y2 <= b);
166			break;
167		case 'intersect':
168			return (l < x1 + (draggable.helperProportions.width / 2) // Right Half
169				&& x2 - (draggable.helperProportions.width / 2) < r // Left Half
170				&& t < y1 + (draggable.helperProportions.height / 2) // Bottom Half
171				&& y2 - (draggable.helperProportions.height / 2) < b ); // Top Half
172			break;
173		case 'pointer':
174			var draggableLeft = ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left),
175				draggableTop = ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top),
176				isOver = $.ui.isOver(draggableTop, draggableLeft, t, l, droppable.proportions.height, droppable.proportions.width);
177			return isOver;
178			break;
179		case 'touch':
180			return (
181					(y1 >= t && y1 <= b) ||	// Top edge touching
182					(y2 >= t && y2 <= b) ||	// Bottom edge touching
183					(y1 < t && y2 > b)		// Surrounded vertically
184				) && (
185					(x1 >= l && x1 <= r) ||	// Left edge touching
186					(x2 >= l && x2 <= r) ||	// Right edge touching
187					(x1 < l && x2 > r)		// Surrounded horizontally
188				);
189			break;
190		default:
191			return false;
192			break;
193		}
194
195};
196
197/*
198	This manager tracks offsets of draggables and droppables
199*/
200$.ui.ddmanager = {
201	current: null,
202	droppables: { 'default': [] },
203	prepareOffsets: function(t, event) {
204
205		var m = $.ui.ddmanager.droppables[t.options.scope] || [];
206		var type = event ? event.type : null; // workaround for #2317
207		var list = (t.currentItem || t.element).find(":data(droppable)").andSelf();
208
209		droppablesLoop: for (var i = 0; i < m.length; i++) {
210
211			if(m[i].options.disabled || (t && !m[i].accept.call(m[i].element[0],(t.currentItem || t.element)))) continue;	//No disabled and non-accepted
212			for (var j=0; j < list.length; j++) { if(list[j] == m[i].element[0]) { m[i].proportions.height = 0; continue droppablesLoop; } }; //Filter out elements in the current dragged item
213			m[i].visible = m[i].element.css("display") != "none"; if(!m[i].visible) continue; 									//If the element is not visible, continue
214
215			if(type == "mousedown") m[i]._activate.call(m[i], event); //Activate the droppable if used directly from draggables
216
217			m[i].offset = m[i].element.offset();
218			m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
219
220		}
221
222	},
223	drop: function(draggable, event) {
224
225		var dropped = false;
226		$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
227
228			if(!this.options) return;
229			if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
230				dropped = dropped || this._drop.call(this, event);
231
232			if (!this.options.disabled && this.visible && this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
233				this.isout = 1; this.isover = 0;
234				this._deactivate.call(this, event);
235			}
236
237		});
238		return dropped;
239
240	},
241	dragStart: function( draggable, event ) {
242		//Listen for scrolling so that if the dragging causes scrolling the position of the droppables can be recalculated (see #5003)
243		draggable.element.parents( ":not(body,html)" ).bind( "scroll.droppable", function() {
244			if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
245		});
246	},
247	drag: function(draggable, event) {
248
249		//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.

250		if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, event);
251
252		//Run through all droppables and check their positions based on specific tolerance options
253		$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
254
255			if(this.options.disabled || this.greedyChild || !this.visible) return;
256			var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
257
258			var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
259			if(!c) return;
260
261			var parentInstance;
262			if (this.options.greedy) {
263				var parent = this.element.parents(':data(droppable):eq(0)');
264				if (parent.length) {
265					parentInstance = $.data(parent[0], 'droppable');
266					parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
267				}
268			}
269
270			// we just moved into a greedy child
271			if (parentInstance && c == 'isover') {
272				parentInstance['isover'] = 0;
273				parentInstance['isout'] = 1;
274				parentInstance._out.call(parentInstance, event);
275			}
276
277			this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
278			this[c == "isover" ? "_over" : "_out"].call(this, event);
279
280			// we just moved out of a greedy child
281			if (parentInstance && c == 'isout') {
282				parentInstance['isout'] = 0;
283				parentInstance['isover'] = 1;
284				parentInstance._over.call(parentInstance, event);
285			}
286		});
287
288	},
289	dragStop: function( draggable, event ) {
290		draggable.element.parents( ":not(body,html)" ).unbind( "scroll.droppable" );
291		//Call prepareOffsets one final time since IE does not fire return scroll events when overflow was caused by drag (see #5003)
292		if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
293	}
294};
295
296})(jQuery);