HTMLFloatField.php

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<?php

class HTMLFloatField extends HTMLTextField {
    function getSize() {
        return isset( $this->mParams['size'] ) ? $this->mParams['size'] : 20;
    }

    function validate( $value, $alldata ) {
        $p = parent::validate( $value, $alldata );

        if ( $p !== true ) {
            return $p;
        }

        $value = trim( $value );

        # http://dev.w3.org/html5/spec/common-microsyntaxes.html#real-numbers
        # with the addition that a leading '+' sign is ok.
        if ( !preg_match( '/^((\+|\-)?\d+(\.\d+)?(E(\+|\-)?\d+)?)?$/i', $value ) ) {
            return $this->msg( 'htmlform-float-invalid' )->parseAsBlock();
        }

        # The "int" part of these message names is rather confusing.
        # They make equal sense for all numbers.
        if ( isset( $this->mParams['min'] ) ) {
            $min = $this->mParams['min'];

            if ( $min > $value ) {
                return $this->msg( 'htmlform-int-toolow', $min )->parseAsBlock();
            }
        }

        if ( isset( $this->mParams['max'] ) ) {
            $max = $this->mParams['max'];

            if ( $max < $value ) {
                return $this->msg( 'htmlform-int-toohigh', $max )->parseAsBlock();
            }
        }

        return true;
    }
}