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   1  /*

   2   * jQuery UI Droppable 1.7.2

   3   *

   4   * Copyright (c) 2009 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   *    ui.core.js

  12   *    ui.draggable.js

  13   */
  14  (function($) {
  15  
  16  $.widget("ui.droppable", {
  17  
  18      _init: function() {
  19  
  20          var o = this.options, accept = o.accept;
  21          this.isover = 0; this.isout = 1;
  22  
  23          this.options.accept = this.options.accept && $.isFunction(this.options.accept) ? this.options.accept : function(d) {
  24              return d.is(accept);
  25          };
  26  
  27          //Store the droppable's proportions

  28          this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
  29  
  30          // Add the reference and positions to the manager

  31          $.ui.ddmanager.droppables[this.options.scope] = $.ui.ddmanager.droppables[this.options.scope] || [];
  32          $.ui.ddmanager.droppables[this.options.scope].push(this);
  33  
  34          (this.options.addClasses && this.element.addClass("ui-droppable"));
  35  
  36      },
  37  
  38      destroy: function() {
  39          var drop = $.ui.ddmanager.droppables[this.options.scope];
  40          for ( var i = 0; i < drop.length; i++ )
  41              if ( drop[i] == this )
  42                  drop.splice(i, 1);
  43  
  44          this.element
  45              .removeClass("ui-droppable ui-droppable-disabled")
  46              .removeData("droppable")
  47              .unbind(".droppable");
  48      },
  49  
  50      _setData: function(key, value) {
  51  
  52          if(key == 'accept') {
  53              this.options.accept = value && $.isFunction(value) ? value : function(d) {
  54                  return d.is(value);
  55              };
  56          } else {
  57              $.widget.prototype._setData.apply(this, arguments);
  58          }
  59  
  60      },
  61  
  62      _activate: function(event) {
  63          var draggable = $.ui.ddmanager.current;
  64          if(this.options.activeClass) this.element.addClass(this.options.activeClass);
  65          (draggable && this._trigger('activate', event, this.ui(draggable)));
  66      },
  67  
  68      _deactivate: function(event) {
  69          var draggable = $.ui.ddmanager.current;
  70          if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
  71          (draggable && this._trigger('deactivate', event, this.ui(draggable)));
  72      },
  73  
  74      _over: function(event) {
  75  
  76          var draggable = $.ui.ddmanager.current;
  77          if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element

  78  
  79          if (this.options.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
  80              if(this.options.hoverClass) this.element.addClass(this.options.hoverClass);
  81              this._trigger('over', event, this.ui(draggable));
  82          }
  83  
  84      },
  85  
  86      _out: function(event) {
  87  
  88          var draggable = $.ui.ddmanager.current;
  89          if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element

  90  
  91          if (this.options.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
  92              if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
  93              this._trigger('out', event, this.ui(draggable));
  94          }
  95  
  96      },
  97  
  98      _drop: function(event,custom) {
  99  
 100          var draggable = custom || $.ui.ddmanager.current;
 101          if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element

 102  
 103          var childrenIntersection = false;
 104          this.element.find(":data(droppable)").not(".ui-draggable-dragging").each(function() {
 105              var inst = $.data(this, 'droppable');
 106              if(inst.options.greedy && $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)) {
 107                  childrenIntersection = true; return false;
 108              }
 109          });
 110          if(childrenIntersection) return false;
 111  
 112          if(this.options.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
 113              if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
 114              if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
 115              this._trigger('drop', event, this.ui(draggable));
 116              return this.element;
 117          }
 118  
 119          return false;
 120  
 121      },
 122  
 123      ui: function(c) {
 124          return {
 125              draggable: (c.currentItem || c.element),
 126              helper: c.helper,
 127              position: c.position,
 128              absolutePosition: c.positionAbs, //deprecated
 129              offset: c.positionAbs
 130          };
 131      }
 132  
 133  });
 134  
 135  $.extend($.ui.droppable, {
 136      version: "1.7.2",
 137      eventPrefix: 'drop',
 138      defaults: {
 139          accept: '*',
 140          activeClass: false,
 141          addClasses: true,
 142          greedy: false,
 143          hoverClass: false,
 144          scope: 'default',
 145          tolerance: 'intersect'
 146      }
 147  });
 148  
 149  $.ui.intersect = function(draggable, droppable, toleranceMode) {
 150  
 151      if (!droppable.offset) return false;
 152  
 153      var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
 154          y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
 155      var l = droppable.offset.left, r = l + droppable.proportions.width,
 156          t = droppable.offset.top, b = t + droppable.proportions.height;
 157  
 158      switch (toleranceMode) {
 159          case 'fit':
 160              return (l < x1 && x2 < r
 161                  && t < y1 && y2 < b);
 162              break;
 163          case 'intersect':
 164              return (l < x1 + (draggable.helperProportions.width / 2) // Right Half
 165                  && x2 - (draggable.helperProportions.width / 2) < r // Left Half
 166                  && t < y1 + (draggable.helperProportions.height / 2) // Bottom Half
 167                  && y2 - (draggable.helperProportions.height / 2) < b ); // Top Half

 168              break;
 169          case 'pointer':
 170              var draggableLeft = ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left),
 171                  draggableTop = ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top),
 172                  isOver = $.ui.isOver(draggableTop, draggableLeft, t, l, droppable.proportions.height, droppable.proportions.width);
 173              return isOver;
 174              break;
 175          case 'touch':
 176              return (
 177                      (y1 >= t && y1 <= b) ||    // Top edge touching
 178                      (y2 >= t && y2 <= b) ||    // Bottom edge touching
 179                      (y1 < t && y2 > b)        // Surrounded vertically
 180                  ) && (
 181                      (x1 >= l && x1 <= r) ||    // Left edge touching
 182                      (x2 >= l && x2 <= r) ||    // Right edge touching
 183                      (x1 < l && x2 > r)        // Surrounded horizontally
 184                  );
 185              break;
 186          default:
 187              return false;
 188              break;
 189          }
 190  
 191  };
 192  
 193  /*

 194      This manager tracks offsets of draggables and droppables

 195  */
 196  $.ui.ddmanager = {
 197      current: null,
 198      droppables: { 'default': [] },
 199      prepareOffsets: function(t, event) {
 200  
 201          var m = $.ui.ddmanager.droppables[t.options.scope];
 202          var type = event ? event.type : null; // workaround for #2317

 203          var list = (t.currentItem || t.element).find(":data(droppable)").andSelf();
 204  
 205          droppablesLoop: for (var i = 0; i < m.length; i++) {
 206  
 207              if(m[i].options.disabled || (t && !m[i].options.accept.call(m[i].element[0],(t.currentItem || t.element)))) continue;    //No disabled and non-accepted

 208              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

 209              m[i].visible = m[i].element.css("display") != "none"; if(!m[i].visible) continue;                                     //If the element is not visible, continue

 210  
 211              m[i].offset = m[i].element.offset();
 212              m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
 213  
 214              if(type == "mousedown") m[i]._activate.call(m[i], event); //Activate the droppable if used directly from draggables

 215  
 216          }
 217  
 218      },
 219      drop: function(draggable, event) {
 220  
 221          var dropped = false;
 222          $.each($.ui.ddmanager.droppables[draggable.options.scope], function() {
 223  
 224              if(!this.options) return;
 225              if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
 226                  dropped = this._drop.call(this, event);
 227  
 228              if (!this.options.disabled && this.visible && this.options.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
 229                  this.isout = 1; this.isover = 0;
 230                  this._deactivate.call(this, event);
 231              }
 232  
 233          });
 234          return dropped;
 235  
 236      },
 237      drag: function(draggable, event) {
 238  
 239          //If you have a highly dynamic page, you might try this option. It renders positions every time you move the mouse.

 240          if(draggable.options.refreshPositions) $.ui.ddmanager.prepareOffsets(draggable, event);
 241  
 242          //Run through all droppables and check their positions based on specific tolerance options

 243  
 244          $.each($.ui.ddmanager.droppables[draggable.options.scope], function() {
 245  
 246              if(this.options.disabled || this.greedyChild || !this.visible) return;
 247              var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
 248  
 249              var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
 250              if(!c) return;
 251  
 252              var parentInstance;
 253              if (this.options.greedy) {
 254                  var parent = this.element.parents(':data(droppable):eq(0)');
 255                  if (parent.length) {
 256                      parentInstance = $.data(parent[0], 'droppable');
 257                      parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
 258                  }
 259              }
 260  
 261              // we just moved into a greedy child

 262              if (parentInstance && c == 'isover') {
 263                  parentInstance['isover'] = 0;
 264                  parentInstance['isout'] = 1;
 265                  parentInstance._out.call(parentInstance, event);
 266              }
 267  
 268              this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
 269              this[c == "isover" ? "_over" : "_out"].call(this, event);
 270  
 271              // we just moved out of a greedy child

 272              if (parentInstance && c == 'isout') {
 273                  parentInstance['isout'] = 0;
 274                  parentInstance['isover'] = 1;
 275                  parentInstance._over.call(parentInstance, event);
 276              }
 277          });
 278  
 279      }
 280  };
 281  
 282  })(jQuery);