# 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;
    };