all files / ol/ centerconstraint.js

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goog.provide('ol.CenterConstraint');
 
goog.require('ol.math');
 
 
/**
 * @param {ol.Extent} extent Extent.
 * @return {ol.CenterConstraintType} The constraint.
 */
ol.CenterConstraint.createExtent = function(extent) {
  return (
    /**
     * @param {ol.Coordinate|undefined} center Center.
     * @return {ol.Coordinate|undefined} Center.
     */
    function(center) {
      if (center) {
        return [
          ol.math.clamp(center[0], extent[0], extent[2]),
          ol.math.clamp(center[1], extent[1], extent[3])
        ];
      } else {
        return undefined;
      }
    });
};
 
 
/**
 * @param {ol.Coordinate|undefined} center Center.
 * @return {ol.Coordinate|undefined} Center.
 */
ol.CenterConstraint.none = function(center) {
  return center;
};