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Drupal example source code file (locale.admin.inc)

This example Drupal source code file (locale.admin.inc) is included in the DevDaily.com "Drupal Source Code Warehouse" project. The intent of this project is to help you "Learn Drupal by Example".

PHP - Drupal tags/keywords

array, foreach, form, function, if, langcode, language, languages, locale, php, title, translate, type, value

The locale.admin.inc Drupal example source code

<?php
// $Id: locale.admin.inc,v 1.23 2011/01/03 18:03:54 webchick Exp $

/**
 * @file
 * Administration functions for locale.module.
 */

/**
 * @defgroup locale-language-administration Language administration interface
 * @{
 * Administration interface for languages.
 *
 * These functions provide the user interface to show, add, edit and
 * delete languages as well as providing options for language negotiation.
 */

/**
 * User interface for the language overview screen.
 */
function locale_languages_overview_form() {
  drupal_static_reset('language');
  $languages = language_list('language');

  $options = array();
  $form['weight'] = array('#tree' => TRUE);
  foreach ($languages as $langcode => $language) {

    $options[$langcode] = '';
    if ($language->enabled) {
      $enabled[] = $langcode;
    }
    $form['weight'][$langcode] = array(
      '#type' => 'weight',
      '#title' => t('Weight for @title', array('@title' => $language->name)),
      '#title_display' => 'invisible',
      '#default_value' => $language->weight,
      '#attributes' => array('class' => array('language-order-weight')),
    );
    $form['name'][$langcode] = array('#markup' => check_plain($language->name));
    $form['native'][$langcode] = array('#markup' => check_plain($language->native));
    $form['direction'][$langcode] = array('#markup' => ($language->direction == LANGUAGE_RTL ? t('Right to left') : t('Left to right')));
  }
  $form['enabled'] = array(
    '#type' => 'checkboxes',
    '#title' => t('Enabled languages'),
    '#title_display' => 'invisible',
    '#options' => $options,
    '#default_value' => $enabled,
  );
  $form['site_default'] = array(
    '#type' => 'radios',
    '#title' => t('Default language'),
    '#title_display' => 'invisible',
    '#options' => $options,
    '#default_value' => language_default('language'),
  );
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Save configuration'));
  $form['#theme'] = 'locale_languages_overview_form';

  return $form;
}

/**
 * Returns HTML for the language overview form.
 *
 * @param $variables
 *   An associative array containing:
 *   - form: A render element representing the form.
 *
 * @ingroup themeable
 */
function theme_locale_languages_overview_form($variables) {
  $form = $variables['form'];
  $default = language_default();
  foreach ($form['name'] as $key => $element) {
    // Do not take form control structures.
    if (is_array($element) && element_child($key)) {
      // Disable checkbox for the default language, because it cannot be disabled.
      if ($key == $default->language) {
        $form['enabled'][$key]['#attributes']['disabled'] = 'disabled';
      }
      $rows[] = array(
        'data' => array(
          '<strong>' . drupal_render($form['name'][$key]) . '</strong>',
          drupal_render($form['native'][$key]),
          check_plain($key),
          drupal_render($form['direction'][$key]),
          array('data' => drupal_render($form['enabled'][$key]), 'align' => 'center'),
          drupal_render($form['site_default'][$key]),
          drupal_render($form['weight'][$key]),
          l(t('edit'), 'admin/config/regional/language/edit/' . $key) . (($key != 'en' && $key != $default->language) ? ' ' . l(t('delete'), 'admin/config/regional/language/delete/' . $key) : '')
        ),
        'class' => array('draggable'),
      );
    }
  }
  $header = array(array('data' => t('English name')), array('data' => t('Native name')), array('data' => t('Code')), array('data' => t('Direction')), array('data' => t('Enabled')), array('data' => t('Default')), array('data' => t('Weight')), array('data' => t('Operations')));
  $output = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'language-order')));
  $output .= drupal_render_children($form);

  drupal_add_tabledrag('language-order', 'order', 'sibling', 'language-order-weight');

  return $output;
}

/**
 * Process language overview form submissions, updating existing languages.
 */
function locale_languages_overview_form_submit($form, &$form_state) {
  $languages = language_list();
  $default = language_default();
  $url_prefixes = variable_get('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX) == LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX;
  $enabled_count = 0;

  foreach ($languages as $langcode => $language) {
    if ($form_state['values']['site_default'] == $langcode || $default->language == $langcode) {
      // Automatically enable the default language and the language
      // which was default previously (because we will not get the
      // value from that disabled checkbox).
      $form_state['values']['enabled'][$langcode] = 1;
    }

    // If language URL prefixes are enabled we must clear language domains and
    // assign a valid prefix to each non-default language.
    if ($url_prefixes) {
      $language->domain = '';
      if (empty($language->prefix) && $form_state['values']['site_default'] != $langcode) {
        $language->prefix = $langcode;
      }
    }

    if ($form_state['values']['enabled'][$langcode]) {
      $enabled_count++;
      $language->enabled = 1;
    }
    else {
      $language->enabled = 0;
    }

    $language->weight = $form_state['values']['weight'][$langcode];

    db_update('languages')
      ->fields(array(
        'enabled' => $language->enabled,
        'weight' => $language->weight,
        'prefix' => $language->prefix,
        'domain' => $language->domain,
      ))
      ->condition('language', $langcode)
      ->execute();

    $languages[$langcode] = $language;
  }

  variable_set('language_default', $languages[$form_state['values']['site_default']]);
  variable_set('language_count', $enabled_count);
  drupal_set_message(t('Configuration saved.'));

  // Changing the language settings impacts the interface.
  cache_clear_all('*', 'cache_page', TRUE);
  module_invoke_all('multilingual_settings_changed');

  $form_state['redirect'] = 'admin/config/regional/language';
  return;
}

/**
 * User interface for the language addition screen.
 */
function locale_languages_add_screen() {
  $build['predefined'] = drupal_get_form('locale_languages_predefined_form');
  $build['custom'] = drupal_get_form('locale_languages_custom_form');
  return $build;
}

/**
 * Predefined language setup form.
 */
function locale_languages_predefined_form($form) {
  $predefined = _locale_prepare_predefined_list();
  $form['language list'] = array('#type' => 'fieldset',
    '#title' => t('Predefined language'),
    '#collapsible' => TRUE,
  );
  $form['language list']['langcode'] = array('#type' => 'select',
    '#title' => t('Language name'),
    '#default_value' => key($predefined),
    '#options' => $predefined,
    '#description' => t('Use the <em>Custom language</em> section below if your desired language does not appear in this list.'),
  );
  $form['language list']['actions'] = array('#type' => 'actions');
  $form['language list']['actions']['submit'] = array('#type' => 'submit', '#value' => t('Add language'));
  return $form;
}

/**
 * Custom language addition form.
 */
function locale_languages_custom_form($form) {
  $form['custom language'] = array('#type' => 'fieldset',
    '#title' => t('Custom language'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  _locale_languages_common_controls($form['custom language']);
  $form['custom language']['actions'] = array('#type' => 'actions');
  $form['custom language']['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Add custom language')
  );
  // Reuse the validation and submit functions of the predefined language setup form.
  $form['#submit'][] = 'locale_languages_predefined_form_submit';
  $form['#validate'][] = 'locale_languages_predefined_form_validate';
  return $form;
}

/**
 * Editing screen for a particular language.
 *
 * @param $langcode
 *   Language code of the language to edit.
 */
function locale_languages_edit_form($form, &$form_state, $langcode) {
  if ($language = db_query("SELECT * FROM {languages} WHERE language = :language", array(':language' => $langcode))->fetchObject()) {
    _locale_languages_common_controls($form, $language);
    $form['actions'] = array('#type' => 'actions');
    $form['actions']['submit'] = array(
      '#type' => 'submit',
      '#value' => t('Save language')
    );
    $form['#submit'][] = 'locale_languages_edit_form_submit';
    $form['#validate'][] = 'locale_languages_edit_form_validate';
    return $form;
  }
  else {
    drupal_not_found();
    drupal_exit();
  }
}

/**
 * Common elements of the language addition and editing form.
 *
 * @param $form
 *   A parent form item (or empty array) to add items below.
 * @param $language
 *   Language object to edit.
 */
function _locale_languages_common_controls(&$form, $language = NULL) {
  if (!is_object($language)) {
    $language = new stdClass();
  }
  if (isset($language->language)) {
    $form['langcode_view'] = array(
      '#type' => 'item',
      '#title' => t('Language code'),
      '#markup' => $language->language
    );
    $form['langcode'] = array(
      '#type' => 'value',
      '#value' => $language->language
    );
  }
  else {
    $form['langcode'] = array('#type' => 'textfield',
      '#title' => t('Language code'),
      '#size' => 12,
      '#maxlength' => 60,
      '#required' => TRUE,
      '#default_value' => @$language->language,
      '#disabled' => (isset($language->language)),
      '#description' => t('<a href="@rfc4646">RFC 4646</a> compliant language identifier. Language codes typically use a country code, and optionally, a script or regional variant name. <em>Examples: "en", "en-US" and "zh-Hant".</em>', array('@rfc4646' => 'http://www.ietf.org/rfc/rfc4646.txt')),
    );
  }
  $form['name'] = array('#type' => 'textfield',
    '#title' => t('Language name in English'),
    '#maxlength' => 64,
    '#default_value' => @$language->name,
    '#required' => TRUE,
    '#description' => t('Name of the language in English. Will be available for translation in all languages.'),
  );
  $form['native'] = array('#type' => 'textfield',
    '#title' => t('Native language name'),
    '#maxlength' => 64,
    '#default_value' => @$language->native,
    '#required' => TRUE,
    '#description' => t('Name of the language in the language being added.'),
  );
  $form['prefix'] = array('#type' => 'textfield',
    '#title' => t('Path prefix language code'),
    '#maxlength' => 64,
    '#default_value' => @$language->prefix,
    '#description' => t('Language code or other custom text to use as a path prefix for URL language detection, if your <em>Detection and selection</em> settings use URL path prefixes. For the default language, this value may be left blank. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "deutsch" as the path prefix code for German results in URLs like "example.com/deutsch/contact".')
  );
  $form['domain'] = array('#type' => 'textfield',
    '#title' => t('Language domain'),
    '#maxlength' => 128,
    '#default_value' => @$language->domain,
    '#description' => t('URL <strong>including protocol</strong> to use for this language, if your <em>Detection and selection</em> settings use URL domains. For the default language, this value may be left blank. <strong>Modifying this value may break existing URLs. Use with caution in a production environment.</strong> Example: Specifying "http://example.de" or "http://de.example.com" as language domains for German results in URLs like "http://example.de/contact" and "http://de.example.com/contact", respectively.'),
  );
  $form['direction'] = array('#type' => 'radios',
    '#title' => t('Direction'),
    '#required' => TRUE,
    '#description' => t('Direction that text in this language is presented.'),
    '#default_value' => @$language->direction,
    '#options' => array(LANGUAGE_LTR => t('Left to right'), LANGUAGE_RTL => t('Right to left'))
  );
  return $form;
}

/**
 * Validate the language addition form.
 */
function locale_languages_predefined_form_validate($form, &$form_state) {
  $langcode = $form_state['values']['langcode'];

  if (($duplicate = db_query("SELECT COUNT(*) FROM {languages} WHERE language = :language", array(':language' => $langcode))->fetchField()) != 0) {
    form_set_error('langcode', t('The language %language (%code) already exists.', array('%language' => $form_state['values']['name'], '%code' => $langcode)));
  }

  if (!isset($form_state['values']['name'])) {
    // Predefined language selection.
    include_once DRUPAL_ROOT . '/includes/iso.inc';
    $predefined = _locale_get_predefined_list();
    if (!isset($predefined[$langcode])) {
      form_set_error('langcode', t('Invalid language code.'));
    }
  }
  else {
    // Reuse the editing form validation routine if we add a custom language.
    locale_languages_edit_form_validate($form, $form_state);
  }
}

/**
 * Process the language addition form submission.
 */
function locale_languages_predefined_form_submit($form, &$form_state) {
  $langcode = $form_state['values']['langcode'];
  if (isset($form_state['values']['name'])) {
    // Custom language form.
    locale_add_language($langcode, $form_state['values']['name'], $form_state['values']['native'], $form_state['values']['direction'], $form_state['values']['domain'], $form_state['values']['prefix']);
    drupal_set_message(t('The language %language has been created and can now be used. More information is available on the <a href="@locale-help">help screen</a>.', array('%language' => t($form_state['values']['name']), '@locale-help' => url('admin/help/locale'))));
  }
  else {
    // Predefined language selection.
    include_once DRUPAL_ROOT . '/includes/iso.inc';
    $predefined = _locale_get_predefined_list();
    locale_add_language($langcode);
    drupal_set_message(t('The language %language has been created and can now be used. More information is available on the <a href="@locale-help">help screen</a>.', array('%language' => t($predefined[$langcode][0]), '@locale-help' => url('admin/help/locale'))));
  }

  // See if we have language files to import for the newly added
  // language, collect and import them.
  if ($batch = locale_batch_by_language($langcode, '_locale_batch_language_finished')) {
    batch_set($batch);
  }

  $form_state['redirect'] = 'admin/config/regional/language';
}

/**
 * Validate the language editing form. Reused for custom language addition too.
 */
function locale_languages_edit_form_validate($form, &$form_state) {
  // Ensure sane field values for langcode, name, and native.
  if (!isset($form['langcode_view']) && preg_match('@[^a-zA-Z_-]@', $form_state['values']['langcode'])) {
    form_set_error('langcode', t('%field may only contain characters a-z, underscores, or hyphens.', array('%field' => $form['langcode']['#title'])));
  }
  if ($form_state['values']['name'] != check_plain($form_state['values']['name'])) {
    form_set_error('name', t('%field cannot contain any markup.', array('%field' => $form['name']['#title'])));
  }
  if ($form_state['values']['native'] != check_plain($form_state['values']['native'])) {
    form_set_error('native', t('%field cannot contain any markup.', array('%field' => $form['native']['#title'])));
  }

  if (!empty($form_state['values']['domain']) && !empty($form_state['values']['prefix'])) {
    form_set_error('prefix', t('Domain and path prefix values should not be set at the same time.'));
  }
  if (!empty($form_state['values']['domain']) && $duplicate = db_query("SELECT language FROM {languages} WHERE domain = :domain AND language <> :language", array(':domain' => $form_state['values']['domain'], ':language' => $form_state['values']['langcode']))->fetchField()) {
    form_set_error('domain', t('The domain (%domain) is already tied to a language (%language).', array('%domain' => $form_state['values']['domain'], '%language' => $duplicate->language)));
  }
  if (empty($form_state['values']['prefix']) && language_default('language') != $form_state['values']['langcode'] && empty($form_state['values']['domain'])) {
    form_set_error('prefix', t('Only the default language can have both the domain and prefix empty.'));
  }
  if (!empty($form_state['values']['prefix']) && $duplicate = db_query("SELECT language FROM {languages} WHERE prefix = :prefix AND language <> :language", array(':prefix' => $form_state['values']['prefix'], ':language' => $form_state['values']['langcode']))->fetchField()) {
    form_set_error('prefix', t('The prefix (%prefix) is already tied to a language (%language).', array('%prefix' => $form_state['values']['prefix'], '%language' => $duplicate->language)));
  }
}

/**
 * Process the language editing form submission.
 */
function locale_languages_edit_form_submit($form, &$form_state) {
  db_update('languages')
    ->fields(array(
      'name' => $form_state['values']['name'],
      'native' => $form_state['values']['native'],
      'domain' => $form_state['values']['domain'],
      'prefix' => $form_state['values']['prefix'],
      'direction' => $form_state['values']['direction'],
    ))
    ->condition('language',  $form_state['values']['langcode'])
    ->execute();
  $default = language_default();
  if ($default->language == $form_state['values']['langcode']) {
    $properties = array('name', 'native', 'direction', 'enabled', 'plurals', 'formula', 'domain', 'prefix', 'weight');
    foreach ($properties as $keyname) {
      if (isset($form_state['values'][$keyname])) {
        $default->$keyname = $form_state['values'][$keyname];
      }
    }
    variable_set('language_default', $default);
  }
  $form_state['redirect'] = 'admin/config/regional/language';
  return;
}

/**
 * User interface for the language deletion confirmation screen.
 */
function locale_languages_delete_form($form, &$form_state, $langcode) {

  // Do not allow deletion of English locale.
  if ($langcode == 'en') {
    drupal_set_message(t('The English language cannot be deleted.'));
    drupal_goto('admin/config/regional/language');
  }

  if (language_default('language') == $langcode) {
    drupal_set_message(t('The default language cannot be deleted.'));
    drupal_goto('admin/config/regional/language');
  }

  // For other languages, warn user that data loss is ahead.
  $languages = language_list();

  if (!isset($languages[$langcode])) {
    drupal_not_found();
    drupal_exit();
  }
  else {
    $form['langcode'] = array('#type' => 'value', '#value' => $langcode);
    return confirm_form($form, t('Are you sure you want to delete the language %name?', array('%name' => t($languages[$langcode]->name))), 'admin/config/regional/language', t('Deleting a language will remove all interface translations associated with it, and posts in this language will be set to be language neutral. This action cannot be undone.'), t('Delete'), t('Cancel'));
  }
}

/**
 * Process language deletion submissions.
 */
function locale_languages_delete_form_submit($form, &$form_state) {
  $languages = language_list();
  if (isset($languages[$form_state['values']['langcode']])) {
    // Remove translations first.
    db_delete('locales_target')
      ->condition('language', $form_state['values']['langcode'])
      ->execute();
    cache_clear_all('locale:' . $form_state['values']['langcode'], 'cache');
    // With no translations, this removes existing JavaScript translations file.
    _locale_rebuild_js($form_state['values']['langcode']);
    // Remove the language.
    db_delete('languages')
      ->condition('language', $form_state['values']['langcode'])
      ->execute();
    db_update('node')
      ->fields(array('language' => ''))
      ->condition('language', $form_state['values']['langcode'])
      ->execute();
    module_invoke_all('multilingual_settings_changed');
    $variables = array('%locale' => $languages[$form_state['values']['langcode']]->name);
    drupal_set_message(t('The language %locale has been removed.', $variables));
    watchdog('locale', 'The language %locale has been removed.', $variables);
  }

  // Changing the language settings impacts the interface:
  cache_clear_all('*', 'cache_page', TRUE);

  $form_state['redirect'] = 'admin/config/regional/language';
  return;
}

/**
 * Setting for language negotiation options
 */
function locale_languages_configure_form() {
  include_once DRUPAL_ROOT . '/includes/language.inc';

  $form = array(
    '#submit' => array('locale_languages_configure_form_submit'),
    '#theme' => 'locale_languages_configure_form',
    '#language_types' => language_types_configurable(FALSE),
    '#language_types_info' => language_types_info(),
    '#language_providers' => language_negotiation_info(),
  );

  foreach ($form['#language_types'] as $type) {
    _locale_languages_configure_form_language_table($form, $type);
  }

  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Save settings'),
  );

  return $form;
}

/**
 * Helper function to build a language provider table.
 */
function _locale_languages_configure_form_language_table(&$form, $type) {
  $info = $form['#language_types_info'][$type];

  $table_form = array(
    '#title' => t('@type language detection', array('@type' => $info['name'])),
    '#tree' => TRUE,
    '#description' => $info['description'],
    '#language_providers' => array(),
    '#show_operations' => FALSE,
    'weight' => array('#tree' => TRUE),
    'enabled' => array('#tree' => TRUE),
  );

  $language_providers = $form['#language_providers'];
  $enabled_providers = variable_get("language_negotiation_$type", array());
  $providers_weight = variable_get("locale_language_providers_weight_$type", array());

  // Add missing data to the providers lists.
  foreach ($language_providers as $id => $provider) {
    if (!isset($providers_weight[$id])) {
      $providers_weight[$id] = language_provider_weight($provider);
    }
  }

  // Order providers list by weight.
  asort($providers_weight);

  foreach ($providers_weight as $id => $weight) {
    $enabled = isset($enabled_providers[$id]);
    $provider = $language_providers[$id];

    // List the provider only if the current type is defined in its 'types' key.
    // If it is not defined default to all the configurable language types.
    $types = array_flip(isset($provider['types']) ? $provider['types'] : $form['#language_types']);

    if (isset($types[$type])) {
      $table_form['#language_providers'][$id] = $provider;

      $table_form['weight'][$id] = array(
        '#type' => 'weight',
        '#title' => t('Weight for @title', array('@title' => $provider['name'])),
        '#title_display' => 'invisible',
        '#default_value' => $weight,
        '#attributes' => array('class' => array("language-provider-weight-$type")),
      );

      $table_form['title'][$id] = array('#markup' => check_plain($provider['name']));

      $table_form['enabled'][$id] = array(
        '#type' => 'checkbox',
        '#title' => t('@title language provider', array('@title' => $provider['name'])),
        '#title_display' => 'invisible',
        '#default_value' => $enabled,
      );
      if ($id === LANGUAGE_NEGOTIATION_DEFAULT) {
        $table_form['enabled'][$id]['#default_value'] = TRUE;
        $table_form['enabled'][$id]['#attributes'] = array('disabled' => 'disabled');
      }

      $table_form['description'][$id] = array('#markup' => filter_xss_admin($provider['description']));

      $config_op = array();
      if (isset($provider['config'])) {
        $config_op = array('#type' => 'link', '#title' => t('Configure'), '#href' => $provider['config']);
        // If there is at least one operation enabled show the operation column.
        $table_form['#show_operations'] = TRUE;
      }
      $table_form['operation'][$id] = $config_op;
    }
  }

  $form[$type] = $table_form;
}

/**
 * Returns HTML for a language configuration form.
 *
 * @param $variables
 *   An associative array containing:
 *   - form: A render element representing the form.
 *
 * @ingroup themeable
 */
function theme_locale_languages_configure_form($variables) {
  $form = $variables['form'];
  $output = '';

  foreach ($form['#language_types'] as $type) {
    $rows = array();
    $info = $form['#language_types_info'][$type];
    $title = '<label>' . $form[$type]['#title'] . '</label>';
    $description = '<div class="description">' . $form[$type]['#description'] . '</div>';

    foreach ($form[$type]['title'] as $id => $element) {
      // Do not take form control structures.
      if (is_array($element) && element_child($id)) {
        $row = array(
          'data' => array(
            '<strong>' . drupal_render($form[$type]['title'][$id]) . '</strong>',
            drupal_render($form[$type]['description'][$id]),
            drupal_render($form[$type]['enabled'][$id]),
            drupal_render($form[$type]['weight'][$id]),
          ),
          'class' => array('draggable'),
        );
        if ($form[$type]['#show_operations']) {
          $row['data'][] = drupal_render($form[$type]['operation'][$id]);
        }
        $rows[] = $row;
      }
    }

    $header = array(
      array('data' => t('Detection method')),
      array('data' => t('Description')),
      array('data' => t('Enabled')),
      array('data' => t('Weight')),
    );

    // If there is at least one operation enabled show the operation column.
    if ($form[$type]['#show_operations']) {
      $header[] = array('data' => t('Operations'));
    }

    $variables = array(
      'header' => $header,
      'rows' => $rows,
      'attributes' => array('id' => "language-negotiation-providers-$type"),
    );
    $table  = theme('table', $variables);
    $table .= drupal_render_children($form[$type]);

    drupal_add_tabledrag("language-negotiation-providers-$type", 'order', 'sibling', "language-provider-weight-$type");

    $output .= '<div class="form-item">' . $title . $description . $table . '</div>';
  }

  $output .= drupal_render_children($form);
  return $output;
}

/**
 * Submit handler for language negotiation settings.
 */
function locale_languages_configure_form_submit($form, &$form_state) {
  $language_types = array();
  $configurable_types = $form['#language_types'];

  foreach ($configurable_types as $type) {
    $negotiation = array();
    $enabled_providers = $form_state['values'][$type]['enabled'];
    $enabled_providers[LANGUAGE_NEGOTIATION_DEFAULT] = TRUE;
    $providers_weight = $form_state['values'][$type]['weight'];
    $language_types[$type] = TRUE;

    foreach ($providers_weight as $id => $weight) {
      if ($enabled_providers[$id]) {
        $provider = $form[$type]['#language_providers'][$id];
        $provider['weight'] = $weight;
        $negotiation[$id] = $provider;
      }
    }

    language_negotiation_set($type, $negotiation);
    variable_set("locale_language_providers_weight_$type", $providers_weight);
  }

  // Save non-configurable language types negotiation.
  $language_types_info = language_types_info();
  $defined_providers = $form['#language_providers'];
  foreach ($language_types_info as $type => $info) {
    if (isset($info['fixed'])) {
      $language_types[$type] = FALSE;
      $negotiation = array();
      foreach ($info['fixed'] as $weight => $id) {
        if (isset($defined_providers[$id])) {
          $negotiation[$id] = $defined_providers[$id];
          $negotiation[$id]['weight'] = $weight;
        }
      }
      language_negotiation_set($type, $negotiation);
    }
  }

  // Save language types.
  variable_set('language_types', $language_types);

  $form_state['redirect'] = 'admin/config/regional/language';
  drupal_set_message(t('Language negotiation configuration saved.'));
}

/**
 * The URL language provider configuration form.
 */
function locale_language_providers_url_form($form, &$form_state) {
  $form['locale_language_negotiation_url_part'] = array(
    '#title' => t('Part of the URL that determines language'),
    '#type' => 'radios',
    '#options' => array(
      LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX => t('Path prefix'),
      LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN => t('Domain'),
    ),
    '#default_value' => variable_get('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX),
    '#description' => t('<em>Path prefix</em>: URLs like http://example.com/de/contact set language to German (de). <em>Domain</em>: URLs like http://de.example.com/contact set the language to German. <strong>Warning: Changing this setting may break incoming URLs. Use with caution on a production site.</strong>'),
  );

  $form_state['redirect'] = 'admin/config/regional/language/configure';

  return system_settings_form($form);
}

/**
 * The URL language provider configuration form.
 */
function locale_language_providers_session_form($form, &$form_state) {
  $form['locale_language_negotiation_session_param'] = array(
    '#title' => t('Request/session parameter'),
    '#type' => 'textfield',
    '#default_value' => variable_get('locale_language_negotiation_session_param', 'language'),
    '#description' => t('Name of the request/session parameter used to determine the desired language.'),
  );

  $form_state['redirect'] = 'admin/config/regional/language/configure';

  return system_settings_form($form);
}

/**
 * @} End of "locale-language-administration"
 */

/**
 * @defgroup locale-translate-administration-screens Translation administration screens
 * @{
 * Screens for translation administration.
 *
 * These functions provide various screens as administration interface
 * to import, export and view translations.
 */

/**
 * Overview screen for translations.
 */
function locale_translate_overview_screen() {
  drupal_static_reset('language_list');
  $languages = language_list('language');
  $groups = module_invoke_all('locale', 'groups');

  // Build headers with all groups in order.
  $headers = array_merge(array(t('Language')), array_values($groups));

  // Collect summaries of all source strings in all groups.
  $sums = db_query("SELECT COUNT(*) AS strings, textgroup FROM {locales_source} GROUP BY textgroup");
  $groupsums = array();
  foreach ($sums as $group) {
    $groupsums[$group->textgroup] = $group->strings;
  }

  // Set up overview table with default values, ensuring common order for values.
  $rows = array();
  foreach ($languages as $langcode => $language) {
    $rows[$langcode] = array('name' => ($langcode == 'en' ? t('English (built-in)') : t($language->name)));
    foreach ($groups as $group => $name) {
      $rows[$langcode][$group] = ($langcode == 'en' ? t('n/a') : '0/' . (isset($groupsums[$group]) ? $groupsums[$group] : 0) . ' (0%)');
    }
  }

  // Languages with at least one record in the locale table.
  $translations = db_query("SELECT COUNT(*) AS translation, t.language, s.textgroup FROM {locales_source} s INNER JOIN {locales_target} t ON s.lid = t.lid GROUP BY textgroup, language");
  foreach ($translations as $data) {
    $ratio = (!empty($groupsums[$data->textgroup]) && $data->translation > 0) ? round(($data->translation/$groupsums[$data->textgroup]) * 100.0, 2) : 0;
    $rows[$data->language][$data->textgroup] = $data->translation . '/' . $groupsums[$data->textgroup] . " ($ratio%)";
  }

  return theme('table', array('header' => $headers, 'rows' => $rows));
}

/**
 * String search screen.
 */
function locale_translate_seek_screen() {
  // Add CSS.
  drupal_add_css(drupal_get_path('module', 'locale') . '/locale.css');

  $elements = drupal_get_form('locale_translation_filter_form');
  $output = drupal_render($elements);
  $output .= _locale_translate_seek();
  return $output;
}

/**
 * List locale translation filters that can be applied.
 */
function locale_translation_filters() {
  $filters = array();

  // Get all languages, except English
  drupal_static_reset('language_list');
  $languages = locale_language_list('name');
  unset($languages['en']);

  $filters['string'] = array(
    'title' => t('String contains'),
    'description' => t('Leave blank to show all strings. The search is case sensitive.'),
  );

  $filters['language'] = array(
    'title' => t('Language'),
    'options' => array_merge(array('all' => t('All languages'), 'en' => t('English (provided by Drupal)')), $languages),
  );

  $filters['translation'] = array(
    'title' => t('Search in'),
    'options' => array('all' => t('Both translated and untranslated strings'), 'translated' => t('Only translated strings'), 'untranslated' => t('Only untranslated strings')),
  );

  $groups = module_invoke_all('locale', 'groups');
  $filters['group'] = array(
    'title' => t('Limit search to'),
    'options' => array_merge(array('all' => t('All text groups')), $groups),
  );

  return $filters;
}

/**
 * Return form for locale translation filters.
 *
 * @ingroup forms
 */
function locale_translation_filter_form() {
  $filters = locale_translation_filters();

  $form['filters'] = array(
    '#type' => 'fieldset',
    '#title' => t('Filter translatable strings'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );
  foreach ($filters as $key => $filter) {
    // Special case for 'string' filter.
    if ($key == 'string') {
      $form['filters']['status']['string'] = array(
        '#type' => 'textfield',
        '#title' => $filter['title'],
        '#description' => $filter['description'],
      );
    }
    else {
      $form['filters']['status'][$key] = array(
        '#title' => $filter['title'],
        '#type' => 'select',
        '#empty_value' => 'all',
        '#empty_option' => $filter['options']['all'],
        '#size' => 0,
        '#options' => $filter['options'],
      );
    }
    if (!empty($_SESSION['locale_translation_filter'][$key])) {
      $form['filters']['status'][$key]['#default_value'] = $_SESSION['locale_translation_filter'][$key];
    }
  }

  $form['filters']['actions'] = array(
    '#type' => 'actions',
    '#attributes' => array('class' => array('container-inline')),
  );
  $form['filters']['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Filter'),
  );
  if (!empty($_SESSION['locale_translation_filter'])) {
    $form['filters']['actions']['reset'] = array(
      '#type' => 'submit',
      '#value' => t('Reset')
    );
  }

  return $form;
}

/**
 * Validate result from locale translation filter form.
 */
function locale_translation_filter_form_validate($form, &$form_state) {
  if ($form_state['values']['op'] == t('Filter') && empty($form_state['values']['language']) && empty($form_state['values']['group'])) {
    form_set_error('type', t('You must select something to filter by.'));
  }
}

/**
 * Process result from locale translation filter form.
 */
function locale_translation_filter_form_submit($form, &$form_state) {
  $op = $form_state['values']['op'];
  $filters = locale_translation_filters();
  switch ($op) {
    case t('Filter'):
      foreach ($filters as $name => $filter) {
        if (isset($form_state['values'][$name])) {
          $_SESSION['locale_translation_filter'][$name] = $form_state['values'][$name];
        }
      }
      break;
    case t('Reset'):
      $_SESSION['locale_translation_filter'] = array();
      break;
  }

  $form_state['redirect'] = 'admin/config/regional/translate/translate';
}

/**
 * User interface for the translation import screen.
 */
function locale_translate_import_form($form) {
  // Get all languages, except English
  drupal_static_reset('language_list');
  $names = locale_language_list('name');
  unset($names['en']);

  if (!count($names)) {
    $languages = _locale_prepare_predefined_list();
    $default = key($languages);
  }
  else {
    $languages = array(
      t('Already added languages') => $names,
      t('Languages not yet added') => _locale_prepare_predefined_list()
    );
    $default = key($names);
  }

  $form['import'] = array('#type' => 'fieldset',
    '#title' => t('Import translation'),
  );
  $form['import']['file'] = array('#type' => 'file',
    '#title' => t('Language file'),
    '#size' => 50,
    '#description' => t('A Gettext Portable Object (<em>.po</em>) file.'),
  );
  $form['import']['langcode'] = array('#type' => 'select',
    '#title' => t('Import into'),
    '#options' => $languages,
    '#default_value' => $default,
    '#description' => t('Choose the language you want to add strings into. If you choose a language which is not yet set up, it will be added.'),
  );
  $form['import']['group'] = array('#type' => 'radios',
    '#title' => t('Text group'),
    '#default_value' => 'default',
    '#options' => module_invoke_all('locale', 'groups'),
    '#description' => t('Imported translations will be added to this text group.'),
  );
  $form['import']['mode'] = array('#type' => 'radios',
    '#title' => t('Mode'),
    '#default_value' => LOCALE_IMPORT_KEEP,
    '#options' => array(
      LOCALE_IMPORT_OVERWRITE => t('Strings in the uploaded file replace existing ones, new ones are added. The plural format is updated.'),
      LOCALE_IMPORT_KEEP => t('Existing strings and the plural format are kept, only new strings are added.')
    ),
  );
  $form['import']['submit'] = array('#type' => 'submit', '#value' => t('Import'));

  return $form;
}

/**
 * Process the locale import form submission.
 */
function locale_translate_import_form_submit($form, &$form_state) {
  $validators = array('file_validate_extensions' => array('po'));
  // Ensure we have the file uploaded
  if ($file = file_save_upload('file', $validators)) {

    // Add language, if not yet supported
    drupal_static_reset('language_list');
    $languages = language_list('language');
    $langcode = $form_state['values']['langcode'];
    if (!isset($languages[$langcode])) {
      include_once DRUPAL_ROOT . '/includes/iso.inc';
      $predefined = _locale_get_predefined_list();
      locale_add_language($langcode);
      drupal_set_message(t('The language %language has been created.', array('%language' => t($predefined[$langcode][0]))));
    }

    // Now import strings into the language
    if ($return = _locale_import_po($file, $langcode, $form_state['values']['mode'], $form_state['values']['group']) == FALSE) {
      $variables = array('%filename' => $file->filename);
      drupal_set_message(t('The translation import of %filename failed.', $variables), 'error');
      watchdog('locale', 'The translation import of %filename failed.', $variables, WATCHDOG_ERROR);
    }
  }
  else {
    drupal_set_message(t('File to import not found.'), 'error');
    $form_state['redirect'] = 'admin/config/regional/translate/import';
    return;
  }

  $form_state['redirect'] = 'admin/config/regional/translate';
  return;
}

/**
 * User interface for the translation export screen.
 */
function locale_translate_export_screen() {
  // Get all languages, except English
  drupal_static_reset('language_list');
  $names = locale_language_list('name');
  unset($names['en']);
  $output = '';
  // Offer translation export if any language is set up.
  if (count($names)) {
    $elements = drupal_get_form('locale_translate_export_po_form', $names);
    $output = drupal_render($elements);
  }
  $elements = drupal_get_form('locale_translate_export_pot_form');
  $output .= drupal_render($elements);
  return $output;
}

/**
 * Form to export PO files for the languages provided.
 *
 * @param $names
 *   An associate array with localized language names
 */
function locale_translate_export_po_form($form, &$form_state, $names) {
  $form['export_title'] = array('#type' => 'item',
    '#title' => t('Export translation'),
  );
  $form['langcode'] = array('#type' => 'select',
    '#title' => t('Language name'),
    '#options' => $names,
    '#description' => t('Select the language to export in Gettext Portable Object (<em>.po</em>) format.'),
  );
  $form['group'] = array('#type' => 'radios',
    '#title' => t('Text group'),
    '#default_value' => 'default',
    '#options' => module_invoke_all('locale', 'groups'),
  );
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Export'));
  return $form;
}

/**
 * Translation template export form.
 */
function locale_translate_export_pot_form() {
  // Complete template export of the strings
  $form['export_title'] = array('#type' => 'item',
    '#title' => t('Export template'),
    '#description' => t('Generate a Gettext Portable Object Template (<em>.pot</em>) file with all strings from the Drupal locale database.'),
  );
  $form['group'] = array('#type' => 'radios',
    '#title' => t('Text group'),
    '#default_value' => 'default',
    '#options' => module_invoke_all('locale', 'groups'),
  );
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Export'));
  // Reuse PO export submission callback.
  $form['#submit'][] = 'locale_translate_export_po_form_submit';
  return $form;
}

/**
 * Process a translation (or template) export form submission.
 */
function locale_translate_export_po_form_submit($form, &$form_state) {
  // If template is required, language code is not given.
  $language = NULL;
  if (isset($form_state['values']['langcode'])) {
    $languages = language_list();
    $language = $languages[$form_state['values']['langcode']];
  }
  _locale_export_po($language, _locale_export_po_generate($language, _locale_export_get_strings($language, $form_state['values']['group'])));
}
/**
 * @} End of "locale-translate-administration-screens"
 */

/**
 * @defgroup locale-translate-edit-delete Translation editing/deletion interface
 * @{
 * Edit and delete translation strings.
 *
 * These functions provide the user interface to edit and delete
 * translation strings.
 */

/**
 * User interface for string editing.
 */
function locale_translate_edit_form($form, &$form_state, $lid) {
  // Fetch source string, if possible.
  $source = db_query('SELECT source, context, textgroup, location FROM {locales_source} WHERE lid = :lid', array(':lid' => $lid))->fetchObject();
  if (!$source) {
    drupal_set_message(t('String not found.'), 'error');
    drupal_goto('admin/config/regional/translate/translate');
  }

  // Add original text to the top and some values for form altering.
  $form['original'] = array(
    '#type'  => 'item',
    '#title' => t('Original text'),
    '#markup' => check_plain(wordwrap($source->source, 0)),
  );
  if (!empty($source->context)) {
    $form['context'] = array(
      '#type' => 'item',
      '#title' => t('Context'),
      '#markup' => check_plain($source->context),
    );
  }
  $form['lid'] = array(
    '#type'  => 'value',
    '#value' => $lid
  );
  $form['textgroup'] = array(
    '#type'  => 'value',
    '#value' => $source->textgroup,
  );
  $form['location'] = array(
    '#type'  => 'value',
    '#value' => $source->location
  );

  // Include default form controls with empty values for all languages.
  // This ensures that the languages are always in the same order in forms.
  $languages = language_list();
  $default = language_default();
  // We don't need the default language value, that value is in $source.
  $omit = $source->textgroup == 'default' ? 'en' : $default->language;
  unset($languages[($omit)]);
  $form['translations'] = array('#tree' => TRUE);
  // Approximate the number of rows to use in the default textarea.
  $rows = min(ceil(str_word_count($source->source) / 12), 10);
  foreach ($languages as $langcode => $language) {
    $form['translations'][$langcode] = array(
      '#type' => 'textarea',
      '#title' => t($language->name),
      '#rows' => $rows,
      '#default_value' => '',
    );
  }

  // Fetch translations and fill in default values in the form.
  $result = db_query("SELECT DISTINCT translation, language FROM {locales_target} WHERE lid = :lid AND language <> :omit", array(':lid' => $lid, ':omit' => $omit));
  foreach ($result as $translation) {
    $form['translations'][$translation->language]['#default_value'] = $translation->translation;
  }

  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Save translations'));
  return $form;
}

/**
 * Validate string editing form submissions.
 */
function locale_translate_edit_form_validate($form, &$form_state) {
  // Locale string check is needed for default textgroup only.
  $safe_check_needed = $form_state['values']['textgroup'] == 'default';
  foreach ($form_state['values']['translations'] as $key => $value) {
    if ($safe_check_needed && !locale_string_is_safe($value)) {
      form_set_error('translations', t('The submitted string contains disallowed HTML: %string', array('%string' => $value)));
      watchdog('locale', 'Attempted submission of a translation string with disallowed HTML: %string', array('%string' => $value), WATCHDOG_WARNING);
    }
  }
}

/**
 * Process string editing form submissions.
 *
 * Saves all translations of one string submitted from a form.
 */
function locale_translate_edit_form_submit($form, &$form_state) {
  $lid = $form_state['values']['lid'];
  foreach ($form_state['values']['translations'] as $key => $value) {
    $translation = db_query("SELECT translation FROM {locales_target} WHERE lid = :lid AND language = :language", array(':lid' => $lid, ':language' => $key))->fetchField();
    if (!empty($value)) {
      // Only update or insert if we have a value to use.
      if (!empty($translation)) {
        db_update('locales_target')
          ->fields(array(
            'translation' => $value,
          ))
          ->condition('lid', $lid)
          ->condition('language', $key)
          ->execute();
      }
      else {
        db_insert('locales_target')
          ->fields(array(
            'lid' => $lid,
            'translation' => $value,
            'language' => $key,
          ))
          ->execute();
      }
    }
    elseif (!empty($translation)) {
      // Empty translation entered: remove existing entry from database.
      db_delete('locales_target')
        ->condition('lid', $lid)
        ->condition('language', $key)
        ->execute();
    }

    // Force JavaScript translation file recreation for this language.
    _locale_invalidate_js($key);
  }

  drupal_set_message(t('The string has been saved.'));

  // Clear locale cache.
  _locale_invalidate_js();
  cache_clear_all('locale:', 'cache', TRUE);

  $form_state['redirect'] = 'admin/config/regional/translate/translate';
  return;
}

/**
 * String deletion confirmation page.
 */
function locale_translate_delete_page($lid) {
  if ($source = db_query('SELECT lid, source FROM {locales_source} WHERE lid = :lid', array(':lid' => $lid))->fetchObject()) {
    return drupal_get_form('locale_translate_delete_form', $source);
  }
  else {
    return drupal_not_found();
  }
}

/**
 * User interface for the string deletion confirmation screen.
 */
function locale_translate_delete_form($form, &$form_state, $source) {
  $form['lid'] = array('#type' => 'value', '#value' => $source->lid);
  return confirm_form($form, t('Are you sure you want to delete the string "%source"?', array('%source' => $source->source)), 'admin/config/regional/translate/translate', t('Deleting the string will remove all translations of this string in all languages. This action cannot be undone.'), t('Delete'), t('Cancel'));
}

/**
 * Process string deletion submissions.
 */
function locale_translate_delete_form_submit($form, &$form_state) {
  db_delete('locales_source')
    ->condition('lid', $form_state['values']['lid'])
    ->execute();
  db_delete('locales_target')
    ->condition('lid', $form_state['values']['lid'])
    ->execute();
  // Force JavaScript translation file recreation for all languages.
  _locale_invalidate_js();
  cache_clear_all('locale:', 'cache', TRUE);
  drupal_set_message(t('The string has been removed.'));
  $form_state['redirect'] = 'admin/config/regional/translate/translate';
}
/**
 * @} End of "locale-translate-edit-delete"
 */

/**
 * Returns HTML for a locale date format form.
 *
 * @param $variables
 *   An associative array containing:
 *   - form: A render element representing the form.
 *
 * @ingroup themeable
 */
function theme_locale_date_format_form($variables) {
  $form = $variables['form'];
  $header = array(
    t('Date type'),
    t('Format'),
  );

  foreach (element_children($form['date_formats']) as $key) {
    $row = array();
    $row[] = $form['date_formats'][$key]['#title'];
    unset($form['date_formats'][$key]['#title']);
    $row[] = array('data' => drupal_render($form['date_formats'][$key]));
    $rows[] = $row;
  }

  $output = drupal_render($form['language']);
  $output .= theme('table', array('header' => $header, 'rows' => $rows));
  $output .= drupal_render_children($form);

  return $output;
}

/**
 * Display edit date format links for each language.
 */
function locale_date_format_language_overview_page() {
  $header = array(
    t('Language'),
    array('data' => t('Operations'), 'colspan' => '2'),
  );

  // Get list of languages.
  $languages = locale_language_list('native');

  foreach ($languages as $langcode => $info) {
    $row = array();
    $row[] = $languages[$langcode];
    $row[] = l(t('edit'), 'admin/config/regional/date-time/locale/' . $langcode . '/edit');
    $row[] = l(t('reset'), 'admin/config/regional/date-time/locale/' . $langcode . '/reset');
    $rows[] = $row;
  }

  return theme('table', array('header' => $header, 'rows' => $rows));
}

/**
 * Provide date localization configuration options to users.
 */
function locale_date_format_form($form, &$form_state, $langcode) {
  $languages = locale_language_list('native');
  $language_name = $languages[$langcode];

  // Display the current language name.
  $form['language'] = array(
    '#type' => 'item',
    '#title' => t('Language'),
    '#markup' => check_plain($language_name),
    '#weight' => -10,
  );
  $form['langcode'] = array(
    '#type' => 'value',
    '#value' => $langcode,
  );

  // Get list of date format types.
  $types = system_get_date_types();

  // Get list of available formats.
  $formats = system_get_date_formats();
  $choices = array();
  foreach ($formats as $type => $list) {
    foreach ($list as $f => $format) {
      $choices[$f] = format_date(REQUEST_TIME, 'custom', $f);
    }
  }
  reset($formats);

  // Get configured formats for each language.
  $locale_formats = system_date_format_locale($langcode);
  // Display a form field for each format type.
  foreach ($types as $type => $type_info) {
    if (!empty($locale_formats) && in_array($type, array_keys($locale_formats))) {
      $default = $locale_formats[$type];
    }
    else {
      $default = variable_get('date_format_' . $type, key($formats));
    }

    // Show date format select list.
    $form['date_formats']['date_format_' . $type] = array(
      '#type' => 'select',
      '#title' => check_plain($type_info['title']),
      '#attributes' => array('class' => array('date-format')),
      '#default_value' => (isset($choices[$default]) ? $default : 'custom'),
      '#options' => $choices,
    );
  }

  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Save configuration'),
  );

  return $form;
}

/**
 * Submit handler for configuring localized date formats on the locale_date_format_form.
 */
function locale_date_format_form_submit($form, &$form_state) {
  include_once DRUPAL_ROOT . '/includes/locale.inc';
  $langcode = $form_state['values']['langcode'];

  // Get list of date format types.
  $types = system_get_date_types();
  foreach ($types as $type => $type_info) {
    $format = $form_state['values']['date_format_' . $type];
    if ($format == 'custom') {
      $format = $form_state['values']['date_format_' . $type . '_custom'];
    }
    locale_date_format_save($langcode, $type, $format);
  }
  drupal_set_message(t('Configuration saved.'));
  $form_state['redirect'] = 'admin/config/regional/date-time/locale';
}

/**
 * Reset locale specific date formats to the global defaults.
 *
 * @param $langcode
 *   Language code, e.g. 'en'.
 */
function locale_date_format_reset_form($form, &$form_state, $langcode) {
  $form['langcode'] = array('#type' => 'value', '#value' => $langcode);
  $languages = language_list();
  return confirm_form($form,
    t('Are you sure you want to reset the date formats for %language to the global defaults?', array('%language' => $languages[$langcode]->name)),
    'admin/config/regional/date-time/locale',
    t('Resetting will remove all localized date formats for this language. This action cannot be undone.'),
    t('Reset'), t('Cancel'));
}

/**
 * Reset date formats for a specific language to global defaults.
 */
function locale_date_format_reset_form_submit($form, &$form_state) {
  db_delete('date_format_locale')
    ->condition('language', $form_state['values']['langcode'])
    ->execute();
  $form_state['redirect'] = 'admin/config/regional/date-time/locale';
}

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