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+/*
+ * jQuery UI Droppable
+ *
+ * Copyright (c) 2008 Paul Bakaus
+ * Dual licensed under the MIT (MIT-LICENSE.txt)
+ * and GPL (GPL-LICENSE.txt) licenses.
+ *
+ * http://docs.jquery.com/UI/Droppables
+ *
+ * Depends:
+ * ui.core.js
+ * ui.draggable.js
+ *
+ * Revision: $Id: ui.droppable.js 5568 2008-05-12 15:07:16Z paul.bakaus $
+ */
+(function($) {
+
+$.widget("ui.droppable", {
+ init: function() {
+
+ this.element.addClass("ui-droppable");
+ this.isover = 0; this.isout = 1;
+
+ //Prepare the passed options
+ var o = this.options, accept = o.accept;
+ o = $.extend(o, {
+ accept: o.accept && o.accept.constructor == Function ? o.accept : function(d) {
+ return $(d).is(accept);
+ }
+ });
+
+ //Store the droppable's proportions
+ this.proportions = { width: this.element.outerWidth(), height: this.element.outerHeight() };
+
+ // Add the reference and positions to the manager
+ $.ui.ddmanager.droppables.push(this);
+
+ },
+ plugins: {},
+ ui: function(c) {
+ return {
+ instance: this,
+ draggable: (c.currentItem || c.element),
+ helper: c.helper,
+ position: c.position,
+ absolutePosition: c.positionAbs,
+ options: this.options,
+ element: this.element
+ };
+ },
+ destroy: function() {
+ var drop = $.ui.ddmanager.droppables;
+ for ( var i = 0; i < drop.length; i++ )
+ if ( drop[i] == this )
+ drop.splice(i, 1);
+
+ this.element
+ .removeClass("ui-droppable ui-droppable-disabled")
+ .removeData("droppable")
+ .unbind(".droppable");
+ },
+ over: function(e) {
+
+ var draggable = $.ui.ddmanager.current;
+ if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
+
+ if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
+ $.ui.plugin.call(this, 'over', [e, this.ui(draggable)]);
+ this.element.triggerHandler("dropover", [e, this.ui(draggable)], this.options.over);
+ }
+
+ },
+ out: function(e) {
+
+ var draggable = $.ui.ddmanager.current;
+ if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return; // Bail if draggable and droppable are same element
+
+ if (this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
+ $.ui.plugin.call(this, 'out', [e, this.ui(draggable)]);
+ this.element.triggerHandler("dropout", [e, this.ui(draggable)], this.options.out);
+ }
+
+ },
+ drop: function(e,custom) {
+
+ var draggable = custom || $.ui.ddmanager.current;
+ if (!draggable || (draggable.currentItem || draggable.element)[0] == this.element[0]) return false; // Bail if draggable and droppable are same element
+
+ var childrenIntersection = false;
+ this.element.find(".ui-droppable").not(".ui-draggable-dragging").each(function() {
+ var inst = $.data(this, 'droppable');
+ if(inst.options.greedy && $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)) {
+ childrenIntersection = true; return false;
+ }
+ });
+ if(childrenIntersection) return false;
+
+ if(this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
+ $.ui.plugin.call(this, 'drop', [e, this.ui(draggable)]);
+ this.element.triggerHandler("drop", [e, this.ui(draggable)], this.options.drop);
+ return true;
+ }
+
+ return false;
+
+ },
+ activate: function(e) {
+
+ var draggable = $.ui.ddmanager.current;
+ $.ui.plugin.call(this, 'activate', [e, this.ui(draggable)]);
+ if(draggable) this.element.triggerHandler("dropactivate", [e, this.ui(draggable)], this.options.activate);
+
+ },
+ deactivate: function(e) {
+
+ var draggable = $.ui.ddmanager.current;
+ $.ui.plugin.call(this, 'deactivate', [e, this.ui(draggable)]);
+ if(draggable) this.element.triggerHandler("dropdeactivate", [e, this.ui(draggable)], this.options.deactivate);
+
+ }
+});
+
+$.extend($.ui.droppable, {
+ defaults: {
+ disabled: false,
+ tolerance: 'intersect'
+ }
+});
+
+$.ui.intersect = function(draggable, droppable, toleranceMode) {
+
+ if (!droppable.offset) return false;
+
+ var x1 = (draggable.positionAbs || draggable.position.absolute).left, x2 = x1 + draggable.helperProportions.width,
+ y1 = (draggable.positionAbs || draggable.position.absolute).top, y2 = y1 + draggable.helperProportions.height;
+ var l = droppable.offset.left, r = l + droppable.proportions.width,
+ t = droppable.offset.top, b = t + droppable.proportions.height;
+
+ switch (toleranceMode) {
+ case 'fit':
+ return (l < x1 && x2 < r
+ && t < y1 && y2 < b);
+ break;
+ 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
+ break;
+ case 'pointer':
+ return (l < ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) && ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left) < r
+ && t < ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) && ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top) < b);
+ break;
+ 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
+ );
+ break;
+ default:
+ return false;
+ break;
+ }
+
+};
+
+/*
+ This manager tracks offsets of draggables and droppables
+*/
+$.ui.ddmanager = {
+ current: null,
+ droppables: [],
+ prepareOffsets: function(t, e) {
+
+ var m = $.ui.ddmanager.droppables;
+ var type = e ? e.type : null; // workaround for #2317
+ for (var i = 0; i < m.length; i++) {
+
+ if(m[i].options.disabled || (t && !m[i].options.accept.call(m[i].element,(t.currentItem || t.element)))) continue;
+ m[i].visible = m[i].element.is(":visible"); if(!m[i].visible) continue; //If the element is not visible, continue
+ m[i].offset = m[i].element.offset();
+ m[i].proportions = { width: m[i].element.outerWidth(), height: m[i].element.outerHeight() };
+
+ if(type == "dragstart" || type == "sortactivate") m[i].activate.call(m[i], e); //Activate the droppable if used directly from draggables
+ }
+
+ },
+ drop: function(draggable, e) {
+
+ var dropped = false;
+ $.each($.ui.ddmanager.droppables, function() {
+
+ if(!this.options) return;
+ if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
+ dropped = this.drop.call(this, e);
+
+ if (!this.options.disabled && this.visible && this.options.accept.call(this.element,(draggable.currentItem || draggable.element))) {
+ this.isout = 1; this.isover = 0;
+ this.deactivate.call(this, e);
+ }
+
+ });
+ return dropped;
+
+ },
+ drag: function(draggable, e) {
+
+ //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, e);
+
+ //Run through all droppables and check their positions based on specific tolerance options
+ $.each($.ui.ddmanager.droppables, function() {
+
+ if(this.disabled || this.greedyChild || !this.visible) return;
+ var intersects = $.ui.intersect(draggable, this, this.options.tolerance);
+
+ var c = !intersects && this.isover == 1 ? 'isout' : (intersects && this.isover == 0 ? 'isover' : null);
+ if(!c) return;
+
+ var parentInstance;
+ if (this.options.greedy) {
+ var parent = this.element.parents('.ui-droppable:eq(0)');
+ if (parent.length) {
+ parentInstance = $.data(parent[0], 'droppable');
+ parentInstance.greedyChild = (c == 'isover' ? 1 : 0);
+ }
+ }
+
+ // we just moved into a greedy child
+ if (parentInstance && c == 'isover') {
+ parentInstance['isover'] = 0;
+ parentInstance['isout'] = 1;
+ parentInstance.out.call(parentInstance, e);
+ }
+
+ this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
+ this[c == "isover" ? "over" : "out"].call(this, e);
+
+ // we just moved out of a greedy child
+ if (parentInstance && c == 'isout') {
+ parentInstance['isout'] = 0;
+ parentInstance['isover'] = 1;
+ parentInstance.over.call(parentInstance, e);
+ }
+ });
+
+ }
+};
+
+/*
+ * Droppable Extensions
+ */
+
+$.ui.plugin.add("droppable", "activeClass", {
+ activate: function(e, ui) {
+ $(this).addClass(ui.options.activeClass);
+ },
+ deactivate: function(e, ui) {
+ $(this).removeClass(ui.options.activeClass);
+ },
+ drop: function(e, ui) {
+ $(this).removeClass(ui.options.activeClass);
+ }
+});
+
+$.ui.plugin.add("droppable", "hoverClass", {
+ over: function(e, ui) {
+ $(this).addClass(ui.options.hoverClass);
+ },
+ out: function(e, ui) {
+ $(this).removeClass(ui.options.hoverClass);
+ },
+ drop: function(e, ui) {
+ $(this).removeClass(ui.options.hoverClass);
+ }
+});
+
+})(jQuery);
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