Vorrei applicare questa patch   https://www.drupal.org/node/2451775

il link diretto è:  https://www.drupal.org/files/issues/math_exp_unformat_token-2451775.patch

il risultato è:

<code><?php

/**
* @file
* Definition of views_handler_field_math.
*/

/**
* Render a mathematical expression as a numeric value
*
* Definition terms:
* - float: If true this field contains a decimal value. If unset this field
*   will be assumed to be integer.
*
* @ingroup views_field_handlers
*/
class views_handler_field_math extends views_handler_field_numeric {
  function option_definition() {
    $options = parent::option_definition();
    $options['expression'] = array('default' => '');

    return $options;
  }

  function options_form(&$form, &$form_state) {
    $form['expression'] = array(
      '#type' => 'textarea',
      '#title' => t('Expression'),
      '#description' => t("Enter mathematical expressions such as 2 + 2 or sqrt(5). You may assign variables and create mathematical functions and evaluate them. Use the ; to separate these. For example: f(x) = x + 2; f(2). The result of the previous row's mathematical expression can be accessed by using the [expression] token itself."),
      '#default_value' => $this->options['expression'],
    );

    // Create a place for the help
    $form['expression_help'] = array();
    parent::options_form($form, $form_state);

    // Then move the existing help:
    $form['expression_help'] = $form['alter']['help'];
    unset($form['expression_help']['#dependency']);
    unset($form['alter']['help']);
  }

  function render($values) {
    ctools_include('math-expr');
    /**
   * Unformat number.
   *
   * @param string $number
   *   The formatted number.
   * @param bool $force_number
   *   Force to convert to number or not.
   * @param string $dec_point
   *   Decimal point.
   * @param string $thousands_sep
   *   Thousand separator.
   *
   * @return string
   *   Unformat number.
   */
  function number_unformat($number, $force_number = FALSE, $dec_point = '.', $thousands_sep = ',') {
    if ($force_number) {
      $number = preg_replace('/^[^\d-]+/', '', $number);
    }
    else {
      if (preg_match('/^[^\d]+/', $number)) {
        return FALSE;
      }
    }
    $type = (strpos($number, $dec_point) === FALSE) ? 'int' : 'float';
    $number = str_replace(array($dec_point, $thousands_sep), array(
      '.',
      ''
    ), $number);
    settype($number, $type);
    return $number;
   }

   /**
   * Unformat token value.
   *
   * @param string $token_value
   *   The token value.
   * @param string $token_name
   *   The token name ([field_a]).
   * @param object $values
   *   View result at each row.
   *
   * @return float
   *   Unformat token value.
   */
    function unformat_token_value($token_value, $token_name, $values) {
    $token_name = str_replace('[', '', $token_name);
    $token_name = str_replace(']', '', $token_name);
    if (!empty($this->view->field[$token_name])) {
      $handler = $this->view->field[$token_name];
      if (is_a($handler, 'views_handler_field_numeric')) {
        // Remove link.
        $token_value = $handler->original_value;
        // Remove prefix and suffix.
        $prefix = $handler->options['prefix'];
        $suffix = $handler->options['suffix'];
        $token_value = str_replace($prefix, '', $token_value);
        $token_value = str_replace($suffix, '', $token_value);

        // Unformat number.
        $token_value = $this->number_unformat($token_value, TRUE, $handler->options['decimal'], $handler->options['separator']);
        return floatval($token_value);
      }

      // Support for field commerce_price.
      if (is_a($handler, 'commerce_price_handler_field_commerce_price')) {
        $amount = $handler->get_value($values);
        $amount = $amount[0];
        return floatval(a_currency_amount_to_decimal($amount['amount'], $amount['currency_code']));
      }
    }
    return $token_value;
    }

    function render($values) {
     ctools_include('math-expr');
    $tokens = $this->get_render_tokens(array());
    foreach ($tokens as $token_name => &$token_value) {
      $token_value = $this->unformat_token_value($token_value, $token_name, $values);
    }

     $value = strtr($this->options['expression'], $tokens);
     $expressions = explode(';', $value);
     $math = new ctools_math_expr;
     $value = strtr($this->options['expression'], $tokens);
     $expressions = explode(';', $value);
     $math = new ctools_math_expr;
     foreach ($expressions as $expression) {
      if ($expression !== '') {
        $value = $math->evaluate($expression);
      }
    }

    // The rest is directly from views_handler_field_numeric but because it
    // does not allow the value to be passed in, it is copied.
    if (!empty($this->options['set_precision'])) {
      $value = number_format($value, $this->options['precision'], $this->options['decimal'], $this->options['separator']);
    }
    else {
      $remainder = abs($value) - intval(abs($value));
      $value = $value > 0 ? floor($value) : ceil($value);
      $value = number_format($value, 0, '', $this->options['separator']);
      if ($remainder) {
        // The substr may not be locale safe.
        $value .= $this->options['decimal'] . substr($remainder, 2);
      }
    }

    // Check to see if hiding should happen before adding prefix and suffix.
    if ($this->options['hide_empty'] && empty($value) && ($value !== 0 || $this->options['empty_zero'])) {
      return '';
    }

    // Should we format as a plural.
    if (!empty($this->options['format_plural']) && ($value != 0 || !$this->options['empty_zero'])) {
      $value = format_plural($value, $this->options['format_plural_singular'], $this->options['format_plural_plural']);
    }

    return $this->sanitize_value($this->options['prefix'] . $value . $this->options['suffix']);
  }

  function query() { }
} </code>

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views_handler_field_math.txt2.99 KB