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jquery.ui.droppable.js
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jquery.ui.droppable.js
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/*!
* jQuery UI Droppable 1.9.2
* http://jqueryui.com
*
* Copyright 2012 jQuery Foundation and other contributors
* Released under the MIT license.
* http://jquery.org/license
*
* http://api.jqueryui.com/droppable/
*
* Depends:
* jquery.ui.core.js
* jquery.ui.widget.js
* jquery.ui.mouse.js
* jquery.ui.draggable.js
*/
(function( $, undefined ) {
$.widget("ui.droppable", {
version: "1.9.2",
widgetEventPrefix: "drop",
options: {
accept: '*',
activeClass: false,
addClasses: true,
greedy: false,
hoverClass: false,
scope: 'default',
tolerance: 'intersect'
},
_create: function() {
var o = this.options, accept = o.accept;
this.isover = 0; this.isout = 1;
this.accept = typeof accept === 'function' ? accept : function(d) {
return d.is(accept);
};
//Store the droppable's proportions
this.proportions = { width: this.element[0].offsetWidth, height: this.element[0].offsetHeight };
// Add the reference and positions to the manager
$.ui.ddmanager.droppables[o.scope] = $.ui.ddmanager.droppables[o.scope] || [];
$.ui.ddmanager.droppables[o.scope].push(this);
(o.addClasses && this.element.addClass("ui-droppable"));
},
_destroy: function() {
var drop = $.ui.ddmanager.droppables[this.options.scope];
for ( var i = 0; i < drop.length; i++ )
if ( drop[i] == this )
drop.splice(i, 1);
this.element.removeClass("ui-droppable ui-droppable-disabled");
},
_setOption: function(key, value) {
if(key == 'accept') {
this.accept = typeof value === 'function' ? value : function(d) {
return d.is(value);
};
}
$.Widget.prototype._setOption.apply(this, arguments);
},
_activate: function(event) {
var draggable = $.ui.ddmanager.current;
if(this.options.activeClass) this.element.addClass(this.options.activeClass);
(draggable && this._trigger('activate', event, this.ui(draggable)));
},
_deactivate: function(event) {
var draggable = $.ui.ddmanager.current;
if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
(draggable && this._trigger('deactivate', event, this.ui(draggable)));
},
_over: function(event) {
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.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
if(this.options.hoverClass) this.element.addClass(this.options.hoverClass);
this._trigger('over', event, this.ui(draggable));
}
},
_out: function(event) {
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.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
this._trigger('out', event, this.ui(draggable));
}
},
_drop: function(event,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(":data(droppable)").not(".ui-draggable-dragging").each(function() {
var inst = $.data(this, 'droppable');
if(
inst.options.greedy
&& !inst.options.disabled
&& inst.options.scope == draggable.options.scope
&& inst.accept.call(inst.element[0], (draggable.currentItem || draggable.element))
&& $.ui.intersect(draggable, $.extend(inst, { offset: inst.element.offset() }), inst.options.tolerance)
) { childrenIntersection = true; return false; }
});
if(childrenIntersection) return false;
if(this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
if(this.options.activeClass) this.element.removeClass(this.options.activeClass);
if(this.options.hoverClass) this.element.removeClass(this.options.hoverClass);
this._trigger('drop', event, this.ui(draggable));
return this.element;
}
return false;
},
ui: function(c) {
return {
draggable: (c.currentItem || c.element),
helper: c.helper,
position: c.position,
offset: c.positionAbs
};
}
});
$.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':
var draggableLeft = ((draggable.positionAbs || draggable.position.absolute).left + (draggable.clickOffset || draggable.offset.click).left),
draggableTop = ((draggable.positionAbs || draggable.position.absolute).top + (draggable.clickOffset || draggable.offset.click).top),
isOver = $.ui.isOver(draggableTop, draggableLeft, t, l, droppable.proportions.height, droppable.proportions.width);
return isOver;
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: { 'default': [] },
prepareOffsets: function(t, event) {
var m = $.ui.ddmanager.droppables[t.options.scope] || [];
var type = event ? event.type : null; // workaround for #2317
var list = (t.currentItem || t.element).find(":data(droppable)").addBack();
droppablesLoop: for (var i = 0; i < m.length; i++) {
if(m[i].options.disabled || (t && !m[i].accept.call(m[i].element[0],(t.currentItem || t.element)))) continue; //No disabled and non-accepted
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
m[i].visible = m[i].element.css("display") != "none"; if(!m[i].visible) continue; //If the element is not visible, continue
if(type == "mousedown") m[i]._activate.call(m[i], event); //Activate the droppable if used directly from draggables
m[i].offset = m[i].element.offset();
m[i].proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
}
},
drop: function(draggable, event) {
var dropped = false;
$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
if(!this.options) return;
if (!this.options.disabled && this.visible && $.ui.intersect(draggable, this, this.options.tolerance))
dropped = this._drop.call(this, event) || dropped;
if (!this.options.disabled && this.visible && this.accept.call(this.element[0],(draggable.currentItem || draggable.element))) {
this.isout = 1; this.isover = 0;
this._deactivate.call(this, event);
}
});
return dropped;
},
dragStart: function( draggable, event ) {
//Listen for scrolling so that if the dragging causes scrolling the position of the droppables can be recalculated (see #5003)
draggable.element.parentsUntil( "body" ).bind( "scroll.droppable", function() {
if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
});
},
drag: function(draggable, event) {
//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, event);
//Run through all droppables and check their positions based on specific tolerance options
$.each($.ui.ddmanager.droppables[draggable.options.scope] || [], function() {
if(this.options.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) {
// find droppable parents with same scope
var scope = this.options.scope;
var parent = this.element.parents(':data(droppable)').filter(function () {
return $.data(this, 'droppable').options.scope === scope;
});
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, event);
}
this[c] = 1; this[c == 'isout' ? 'isover' : 'isout'] = 0;
this[c == "isover" ? "_over" : "_out"].call(this, event);
// we just moved out of a greedy child
if (parentInstance && c == 'isout') {
parentInstance['isout'] = 0;
parentInstance['isover'] = 1;
parentInstance._over.call(parentInstance, event);
}
});
},
dragStop: function( draggable, event ) {
draggable.element.parentsUntil( "body" ).unbind( "scroll.droppable" );
//Call prepareOffsets one final time since IE does not fire return scroll events when overflow was caused by drag (see #5003)
if( !draggable.options.refreshPositions ) $.ui.ddmanager.prepareOffsets( draggable, event );
}
};
})(jQuery);

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