resources/jquery.ui/jquery.ui.droppable.js

   1 /*
   2  * jQuery UI Droppable 1.8.2
   3  *
   4  * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   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($) {
  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: "1.8.2"
 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                         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);