lang_dropdown.module in Language Switcher Dropdown 6

File

lang_dropdown.module

<?php

/**
 * Implements hook_help().
 */
function lang_dropdown_help($path, $arg) {
  switch ($path) {
    case 'admin/build/block/configure':
      if ($arg[4] == 'lang_dropdown' && $arg[5] == 0) {
        return '<p>' . t('This block is only shown if <a href="@languages">at least two languages are enabled</a> and <a href="@configuration">language negotiation</a> is set to something other than <em>None</em>.', array(
          '@languages' => url('admin/settings/language'),
          '@configuration' => url('admin/settings/language/configure'),
        )) . '</p>';
      }
      break;
  }
}

/**
 * Implements hook_block().
 */
function lang_dropdown_block($op = 'list', $delta = 0, $edit = array()) {
  if ($op == 'list') {
    $blocks[0] = array(
      'info' => t('Language switcher dropdown'),
      'cache' => BLOCK_NO_CACHE,
    );
    return $blocks;
  }
  elseif ($op == 'view' && variable_get('language_count', 1) > 1 && variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE) != LANGUAGE_NEGOTIATION_NONE && $delta == 0) {
    switch ($delta) {
      case 0:
        $block = array(
          'subject' => t('Languages'),
          'content' => drupal_get_form('lang_dropdown_form'),
        );
        break;
    }
    return $block;
  }
  elseif ($op == 'configure' && $delta == 0) {
    drupal_add_js(drupal_get_path('module', 'lang_dropdown') . '/lang_dropdown.admin.js');
    return lang_dropdown_block_form();
  }
  elseif ($op == 'save' && $delta == 0) {
    $lang_dropdown_settings = array(
      'showall' => $edit['showall'],
      'js_widget' => $edit['js_widget'],
      'js_widget_settings' => array(
        'visible_rows' => $edit['visible_rows'],
        'row_height' => $edit['row_height'],
        'width' => $edit['width'],
        'animation' => $edit['animation'],
      ),
      'languageicons' => array(),
    );
    if (module_exists('languageicons')) {
      $lang_dropdown_settings['languageicons']['flag_position'] = $edit['flag_position'];
    }
    variable_set('lang_dropdown', $lang_dropdown_settings);
  }
}

/**
 * Builds the select widget form
 */
function lang_dropdown_form() {
  global $language;
  if (module_exists('languageicons')) {
    variable_set('languageicons_show_block', 0);
  }
  $module_path = drupal_get_path('module', 'lang_dropdown');
  $path = drupal_is_front_page() ? '<front>' : $_GET['q'];
  $settings = _lang_dropdown_get_settings();
  $languages = language_list('enabled');
  $options = $select_options = $js_settings = array();
  $selected_option_language_icon = '';
  foreach ($languages[1] as $lang_item) {
    $options[$lang_item->language] = array(
      'href' => $path,
      'title' => $lang_item->native,
      'language' => $lang_item,
    );
  }

  // All languages
  $all_languages = $options;

  // Only languages for which there is a translation
  drupal_alter('translation_link', $options, $path);

  // If show all languages is configured we have
  // to take into account languages with no translation
  // linking them to homepage <front>
  if ($settings['showall'] && count($all_languages) != count($options)) {
    foreach ($all_languages as $key => $value) {
      if (!array_key_exists($key, $options)) {
        $all_languages[$key]['href'] = '<front>';
      }
      else {
        $all_languages[$key] = $options[$key];
      }
    }
    $options = $all_languages;
  }
  drupal_add_js($module_path . '/lang_dropdown.js');
  drupal_add_css($module_path . '/lang_dropdown.css');
  foreach ($options as $lang_option) {
    $path = check_url(url($lang_option['href'], array(
      'language' => $lang_option['language'],
      'query' => drupal_query_string_encode($_GET, array(
        'q',
      )),
    )));
    $select_options += array(
      $path => $lang_option['language']->native,
    );

    // Set the selected option
    if ($language->language == $lang_option['language']->language) {
      $selected_option = $path;
      if (module_exists('languageicons')) {
        $selected_option_language_icon = theme('languageicons_icon', $lang_option['language']);
      }
    }

    // Handle flags with Language icons module using JS widget
    if (module_exists('languageicons') && $settings['js_widget']) {
      $selected_option_language_icon = '';
      $icons_path = variable_get('languageicons_path', drupal_get_path('module', 'languageicons') . '/flags/*.png');
      $js_settings['languageicons'][$path] = base_path() . str_replace('*', $lang_option['language']->language, $icons_path);
    }
  }

  // Add required files and settings for JS widget
  if ($settings['js_widget']) {
    drupal_add_js($module_path . '/msdropdown/jquery.dd.js');
    $js_settings += array(
      'visibleRows' => $settings['js_widget_settings']['visible_rows'],
      'rowHeight' => $settings['js_widget_settings']['row_height'],
      'animStyle' => $settings['js_widget_settings']['animation'],
    );
    if ($settings['languageicons']['flag_position']) {
      drupal_add_css($module_path . '/msdropdown/dd_after.css');
      $js_settings += array(
        'mainCSS' => 'dd_after',
      );
    }
    else {
      drupal_add_css($module_path . '/msdropdown/dd.css');
      $js_settings += array(
        'mainCSS' => 'dd',
      );
    }
    drupal_add_js(array(
      'langDropdown' => array(
        'jsWidget' => $js_settings,
      ),
    ), 'setting');
  }
  $settings['languageicons']['flag_position'] ? $flag_position = '#suffix' : ($flag_position = '#prefix');
  $form['lang_dropdown_select'] = array(
    '#type' => 'select',
    '#default_value' => isset($selected_option) ? $selected_option : key($select_options),
    '#options' => $select_options,
    '#attributes' => array(
      'style' => 'width:' . $settings['js_widget_settings']['width'] . 'px',
    ),
  );
  if (module_exists('languageicons') && !$settings['js_widget']) {
    $form['lang_dropdown_select'][$flag_position] = $selected_option_language_icon;
  }
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Go'),
    // The below prefix & suffix for gracefull fallback if JavaScript was disabled
    '#prefix' => "<noscript><div>\n",
    '#suffix' => "\n</div></noscript>",
  );
  return $form;
}

/**
 * Handles graceful degrade when JS is disabled.
 */
function lang_dropdown_form_submit($form, &$form_state) {
  drupal_goto($form_state['values']['lang_dropdown_select']);
}

/**
 * Generates block settings form
 */
function lang_dropdown_block_form() {
  $settings = _lang_dropdown_get_settings();
  $form = array();
  $form['lang_dropdown'] = array(
    '#type' => 'fieldset',
    '#title' => t('Language switcher dropdown settings'),
    '#weight' => 10,
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
  );
  $form['lang_dropdown']['showall'] = array(
    '#type' => 'checkbox',
    '#title' => t('Show all enabled languages'),
    '#description' => t('Show all languages in the switcher no matter if there is a translation for the node or not. For languages without translation the switcher will redirect to homepage.'),
    '#default_value' => $settings['showall'],
  );
  $form['lang_dropdown']['js_widget'] = array(
    '#type' => 'checkbox',
    '#title' => t('Output as JavaScript widget instead of HTML <em>select</em> element.'),
    '#description' => t('This option is amazing with <a href="!href">Language icons</a> module.', array(
      '!href' => 'http://drupal.org/project/languageicons',
    )),
    '#default_value' => $settings['js_widget'],
  );
  $form['lang_dropdown']['width'] = array(
    '#type' => 'textfield',
    '#title' => t('Width of dropdown element'),
    '#size' => 5,
    '#maxlength' => 3,
    '#required' => TRUE,
    '#field_suffix' => 'px',
    '#default_value' => $settings['js_widget_settings']['width'],
  );
  $form['lang_dropdown']['wrapper'] = array(
    '#prefix' => '<div class="clear-block" id="lang-dropdown-js-widget-settings-wrapper">',
    '#suffix' => '</div>',
  );
  $num_rows = array(
    2,
    3,
    4,
    5,
    6,
    7,
    8,
    9,
    10,
  );
  $form['lang_dropdown']['wrapper']['visible_rows'] = array(
    '#type' => 'select',
    '#title' => t('Number of visible rows'),
    '#options' => array_combine($num_rows, $num_rows),
    '#default_value' => $settings['js_widget_settings']['visible_rows'],
  );
  $form['lang_dropdown']['wrapper']['row_height'] = array(
    '#type' => 'textfield',
    '#title' => t('Row height'),
    '#size' => 5,
    '#maxlength' => 3,
    '#required' => TRUE,
    '#field_suffix' => 'px',
    '#default_value' => $settings['js_widget_settings']['row_height'],
  );
  $form['lang_dropdown']['wrapper']['animation'] = array(
    '#type' => 'select',
    '#title' => t('Animation style for dropdown'),
    '#options' => array(
      'slideDown' => t('Slide down'),
      'fadeIn' => t('Fade in'),
    ),
    '#default_value' => $settings['js_widget_settings']['animation'],
  );
  $form['lang_dropdown']['languageicons'] = array(
    '#type' => 'fieldset',
    '#title' => t('Language icons settings'),
    '#weight' => 10,
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );
  if (module_exists('languageicons')) {
    $form['lang_dropdown']['languageicons']['flag_position'] = array(
      '#type' => 'select',
      '#title' => t('Position of the flag'),
      '#options' => array(
        0 => t('Before'),
        1 => t('After'),
      ),
      '#default_value' => $settings['languageicons']['flag_position'],
    );
  }
  else {
    $form['lang_dropdown']['languageicons']['#description'] = t('Enable <a href="!href">Language icons</a> to enhance the Language dropdown widget.', array(
      '!href' => 'http://drupal.org/project/languageicons',
    ));
  }
  return $form;
}

/**
 * Helper function to get Language switcher dropdown settings
 */
function _lang_dropdown_get_settings() {
  $defaults = array(
    'showall' => 0,
    'js_widget' => 1,
    'js_widget_settings' => array(
      'visible_rows' => 5,
      'row_height' => 23,
      'width' => 140,
      'animation' => 'slideDown',
    ),
    'languageicons' => array(
      'flag_position' => 1,
    ),
  );
  return array_merge($defaults, variable_get('lang_dropdown', $defaults));
}

Functions

Name	Description
lang_dropdown_block	Implements hook_block().
lang_dropdown_block_form	Generates block settings form
lang_dropdown_form	Builds the select widget form
lang_dropdown_form_submit	Handles graceful degrade when JS is disabled.
lang_dropdown_help	Implements hook_help().
_lang_dropdown_get_settings	Helper function to get Language switcher dropdown settings