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40 aurelien 1
/*
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 * jQuery UI Droppable 1.8.5
3
 *
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 * Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
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 * Dual licensed under the MIT or GPL Version 2 licenses.
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 * http://jquery.org/license
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 *
8
 * http://docs.jquery.com/UI/Droppables
9
 *
10
 * Depends:
11
 *	jquery.ui.core.js
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 *	jquery.ui.widget.js
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 *	jquery.ui.mouse.js
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 *	jquery.ui.draggable.js
15
 */
16
(function( $, undefined ) {
17
 
18
$.widget("ui.droppable", {
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	widgetEventPrefix: "drop",
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	options: {
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		accept: '*',
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		activeClass: false,
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		addClasses: true,
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		greedy: false,
25
		hoverClass: false,
26
		scope: 'default',
27
		tolerance: 'intersect'
28
	},
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	_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) {
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			return d.is(accept);
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		};
37
 
38
		//Store the droppable's proportions
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		this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
40
 
41
		// Add the reference and positions to the manager
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		$.ui.ddmanager.droppables[o.scope] = $.ui.ddmanager.droppables[o.scope] || [];
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		$.ui.ddmanager.droppables[o.scope].push(this);
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45
		(o.addClasses && this.element.addClass("ui-droppable"));
46
 
47
	},
48
 
49
	destroy: function() {
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		var drop = $.ui.ddmanager.droppables[this.options.scope];
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		for ( var i = 0; i < drop.length; i++ )
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			if ( drop[i] == this )
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				drop.splice(i, 1);
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55
		this.element
56
			.removeClass("ui-droppable ui-droppable-disabled")
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			.removeData("droppable")
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			.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);
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		(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
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				&& 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: "1.8.5"
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
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					(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
			m[i].offset = m[i].element.offset();
216
			m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
217
 
218
			if(type == "mousedown") m[i]._activate.call(m[i], event); //Activate the droppable if used directly from draggables
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
	drag: function(draggable, event) {
242
 
243
		//If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.
244
		if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, event);
245
 
246
		//Run through all droppables and check their positions based on specific tolerance options
247
		$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
248
 
249
			if(this.options.disabled || this.greedyChild || !this.visible) return;
250
			var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
251
 
252
			var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
253
			if(!c) return;
254
 
255
			var parentInstance;
256
			if (this.options.greedy) {
257
				var parent = this.element.parents(':data(droppable):eq(0)');
258
				if (parent.length) {
259
					parentInstance = $.data(parent[0], 'droppable');
260
					parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
261
				}
262
			}
263
 
264
			// we just moved into a greedy child
265
			if (parentInstance && c == 'isover') {
266
				parentInstance['isover'] = 0;
267
				parentInstance['isout'] = 1;
268
				parentInstance._out.call(parentInstance, event);
269
			}
270
 
271
			this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
272
			this[c == "isover" ? "_over" : "_out"].call(this, event);
273
 
274
			// we just moved out of a greedy child
275
			if (parentInstance && c == 'isout') {
276
				parentInstance['isout'] = 0;
277
				parentInstance['isover'] = 1;
278
				parentInstance._over.call(parentInstance, event);
279
			}
280
		});
281
 
282
	}
283
};
284
 
285
})(jQuery);