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/*
* Copyright 2007-2011 WorldWide Conferencing, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package net.liftweb
package record
package field

import net.liftweb.http.{S}
import net.liftweb.http.js._
import net.liftweb.util._
import net.liftweb.common._
import scala.reflect.Manifest
import scala.xml._
import S._
import Helpers._
import JE._

trait NumericTypedField[MyType] extends TypedField[MyType] {

  /** Augments genericSetFromAny with support for values of type Number (optionally wrapped in any of the usual suspects) */
  protected final def setNumericFromAny(in: Any, f: Number => MyType)(implicit m: Manifest[MyType]): Box[MyType] =
    in match {
      case (n: Number) => setBox(Full(f(n)))
      case Some(n: Number) => setBox(Full(f(n)))
      case Full(n: Number) => setBox(Full(f(n)))
      case (n: Number)::_ => setBox(Full(f(n)))
      case _ => genericSetFromAny(in)
    }

  private def elem = S.fmapFunc((s: List[String]) => setFromAny(s)) {
    funcName => <input type="text" name={funcName} value={valueBox.map(_.toString) openOr ""} tabindex={tabIndex toString}/>
  }

  /**
* Returns form input of this field
*/
  def toForm: Box[NodeSeq] =
    uniqueFieldId match {
      case Full(id) => Full(elem % ("id" -> id))
      case _ => Full(elem)
    }

  override def noValueErrorMessage = S.?("number.required")

  def asJs = valueBox.map(v => JsRaw(String.valueOf(v))) openOr JsNull

}
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