function mathfield_form_afterbuild in Math Field 7

Afterbuild callbcak for forms with math expression fields.

1 string reference to 'mathfield_form_afterbuild'

mathfield_field_widget_form in ./mathfield.module

Implements hook_field_widget_form().

File

./mathfield.module, line 287

Adds a dynamic math expression field.

Code

function mathfield_form_afterbuild($form, &$form_state) {
  $info = entity_get_info($form['#entity_type']);
  $is_new = !empty($form['#entity']->{$info['entity keys']['id']});
  if ($is_new || $form_state['rebuild'] || empty($form_state['mathfield'])) {

    // Nothing to see here.
    return $form;
  }

  // Order mathfield elements by dependency.
  $elements = $form_state['mathfield'];
  uasort($elements, '_mathfield_order_by_dependency');

  // Evaluate math expression fields on initial form load for new entities.
  foreach ($elements as $element) {
    if ($element['#widget'] != 'mathfield_markup') {

      // Don't override custom values.
      $submitted_value = drupal_array_get_nested_value($form_state['values'], $element['#parents']);
      if (is_numeric($submitted_value)) {
        continue;
      }
    }
    $expression = $element['#settings']['expression'];
    $replacements = mathfield_get_token_values($element, $form_state);
    $value = mathfield_evaluate($expression, $element['#settings'], $replacements);
    if (is_numeric($value)) {

      // Update the value of the mathfield.
      $element['#value'] = $value;

      // Update the value column and field prefix for readonly math
      // expressions.
      if ($element['#widget'] == 'mathfield_markup') {
        $parents = $element['#array_parents'];
        array_splice($parents, -1, 1, array(
          'value',
        ));
        $value_element = drupal_array_get_nested_value($form, $parents);
        $value_element['#value'] = $value;
        drupal_array_set_nested_value($form, $parents, $value_element, TRUE);
        $element['#field_prefix'] = preg_replace('/<span class="mathfield-display">*?<\\/span>/i', '<span class="mathfield-display">' . check_plain($value) . '</span>', $element['#field_prefix']);
      }

      // Update the value in $form and $form_state.
      drupal_array_set_nested_value($form, $element['#parents'], $element, TRUE);
      mathfield_form_set_value($element, $value, $form_state);
    }
  }
  return $form;
}