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/**
* @add jQuery.Drag.prototype
*/
steal('jquery/event/drag', 'jquery/dom/cur_styles').then(function( $ ) {
$.Drag.prototype
/**
* @function limit
* @plugin jquery/event/drag/limit
* @download http://jmvcsite.heroku.com/pluginify?plugins[]=jquery/event/event/drag/limit/limit.js
* limits the drag to a containing element
* @param {jQuery} container
* @param {Object} [center] can set the limit to the center of the object. Can be
* 'x', 'y' or 'both'
* @return {$.Drag}
*/
.limit = function( container, center ) {
//on draws ... make sure this happens
var styles = container.curStyles('borderTopWidth', 'paddingTop', 'borderLeftWidth', 'paddingLeft'),
paddingBorder = new $.Vector(
parseInt(styles.borderLeftWidth, 10) + parseInt(styles.paddingLeft, 10) || 0, parseInt(styles.borderTopWidth, 10) + parseInt(styles.paddingTop, 10) || 0);
this._limit = {
offset: container.offsetv().plus(paddingBorder),
size: container.dimensionsv(),
center : center === true ? 'both' : center
};
return this;
};
var oldPosition = $.Drag.prototype.position;
$.Drag.prototype.position = function( offsetPositionv ) {
//adjust required_css_position accordingly
if ( this._limit ) {
var limit = this._limit,
center = limit.center && limit.center.toLowerCase(),
movingSize = this.movingElement.dimensionsv('outer'),
halfHeight = center && center != 'x' ? movingSize.height() / 2 : 0,
halfWidth = center && center != 'y' ? movingSize.width() / 2 : 0,
lot = limit.offset.top(),
lof = limit.offset.left(),
height = limit.size.height(),
width = limit.size.width();
//check if we are out of bounds ...
//above
if ( offsetPositionv.top()+halfHeight < lot ) {
offsetPositionv.top(lot - halfHeight);
}
//below
if ( offsetPositionv.top() + movingSize.height() - halfHeight > lot + height ) {
offsetPositionv.top(lot + height - movingSize.height() + halfHeight);
}
//left
if ( offsetPositionv.left()+halfWidth < lof ) {
offsetPositionv.left(lof - halfWidth);
}
//right
if ( offsetPositionv.left() + movingSize.width() -halfWidth > lof + width ) {
offsetPositionv.left(lof + width - movingSize.left()+halfWidth);
}
}
oldPosition.call(this, offsetPositionv);
};
});