i18n.inc

   1 <?php
   2 // $Id$
   3
   4 /**
   5  * Internationalization (i18n) module
   6  *
   7  * These are the functions to be defined only when module is enabled.
   8  * Otherwise they could mess up with the admin system
   9  *
  10  * @author Jose A. Reyero, 2004
  11  *
  12  */
  13
  14 /**
  15  * Implementation of conf_url_rewrite
  16  *
  17  * This is a conditional definition, just in case it is defined somewhere else
  18  */
  19
  20 if(!function_exists('custom_url_rewrite')) {
  21   function custom_url_rewrite($type, $path, $original) {
  22     return i18n_url_rewrite($type, $path, $original);
  23   }
  24 }
  25
  26 function i18n_url_rewrite($type, $path, $original){
  27   if ($type == 'alias' && !i18n_get_lang_prefix($path) ){
  28     return $path ? i18n_get_lang() . '/'. $path : i18n_get_lang();
  29   } else {
  30     return $path;
  31   }
  32 }
  33
  34 /**
  35  * Implementation of hook_db_rewrite_sql()
  36  */
  37 function i18n_db_rewrite_sql($query, $primary_table, $primary_key){
  38   // Some exceptions for query rewrites
  39   if(strstr(request_uri(),'cron.php')) return;
  40
  41   $alias = $primary_table;
  42
  43   switch ($alias) {
  44     case 'n':
  45       $result = i18n_db_node_rewrite($query, $primary_table, $primary_key);
  46       break;
  47     case 't':
  48     case 'v':
  49       $result = i18n_db_taxonomy_rewrite($query, $primary_table, $primary_key);
  50       break;
  51   }
  52
  53   return $result;
  54 }
  55
  56 function i18n_db_node_rewrite($query, $primary_table, $primary_key){
  57   $alias = $primary_table;
  58   // When loading specific nodes, language conditions shouldn't apply
  59   // TO-DO: Refine this regexp
  60   if (preg_match("/WHERE.*$alias.nid\s*=\s*(\d|%d)/", $query)) return;
  61   //drupal_set_message($query);
  62   $mode = i18n_selection_mode();
  63   if($mode == 'off') return;
  64
  65   $result['join'] = "LEFT JOIN {i18n_node} i18n ON $alias.nid = i18n.nid";
  66   $alias = 'i18n';
  67
  68   switch($mode){
  69     case 'simple':
  70       $result['where'] = "$alias.language ='".i18n_get_lang()."' OR $alias.language IS NULL" ;
  71       break;
  72     case 'mixed':
  73       $result['where'] = "$alias.language ='".i18n_get_lang()."' OR $alias.language ='".i18n_default_language()."' OR $alias.language IS NULL" ;
  74       break;
  75     case 'strict':
  76       $result['where'] = "$alias.language ='".i18n_get_lang()."'" ;
  77       break;
  78     case 'default':
  79       $result['where'] = "$alias.language ='".i18n_default_language()."' OR $alias.language IS NULL" ;
  80       break;
  81   }
  82
  83   return $result;
  84 }
  85
  86 function i18n_db_taxonomy_rewrite($query, $primary_table, $primary_key){
  87   // When loading specific terms, vocabs, language conditions shouldn't apply
  88   // TO-DO: Refine this regexp
  89   if (preg_match("/WHERE.* $primary_table\.tid\s*(=\s*\d|IN)/", $query)) return;
  90
  91   // Decide language depending on what we are doing
  92   $lang = i18n_get_lang(); // Default
  93   switch(arg(0)) {
  94     case 'node':
  95             $edit = $_POST['edit'];
  96             if( arg(1) == 'add'){
  97               // Adding node
  98               $lang = isset($edit['language']) ? $edit['language'] : i18n_get_lang();
  99             } elseif( is_numeric(arg(1)) && arg(2) == 'edit') {
 100               // Editing a node
 101               if(is_array($edit)) {
 102                 $lang = isset($edit['language']) ? $edit['language'] : i18n_get_lang();
 103               } else {
 104                 $lang = i18n_node_get_lang(arg(1), i18n_get_lang());
 105               }
 106             } else {
 107               $lang = i18n_get_lang();
 108             }
 109             break;
 110     case 'translation':
 111       $edit = $_POST['edit'];
 112       $lang = isset($edit['language']) ? $edit['language'] : arg(3);
 113       break;
 114     case 'admin':
 115                   if(arg(1) == 'taxonomy') {
 116                     // Taxonomy administration. Show all
 117                     $lang = NULL;
 118                   }
 119     /*
 120     case 'taxonomy':
 121       if(arg(1) == 'term'){
 122         $lang = NULL;
 123       }
 124       */
 125   }
 126
 127   if($lang) {
 128     $alias = $primary_table;
 129     $result['where'] = "$alias.language ='$lang' OR $alias.language = ''";
 130     return $result;
 131   }
 132 }
 133
 134 /**
 135  * Implementation of hook_exit
 136  */
 137 function i18n_exit(){
 138   _i18n_variable_exit();
 139 }
 140
 141 /**
 142  * Implementation of hook_form_alter
 143  *
 144  * This is the place to add language fields to all forms
 145  * Alan: - changed to test in case translation_form_alter (or another module/mechanism) has already set language
 146  *       - translation module may reduce language selection options in case there already exist translations
 147  */
 148 function i18n_form_alter($form_id, &$form) {
 149   //drupal_set_message("i18n_form_alter form_id=$form_id ");
 150   switch($form_id){
 151     case 'taxonomy_overview_vocabularies':
 152       $vocabularies = taxonomy_get_vocabularies();
 153       $languages = i18n_supported_languages();
 154       foreach ($vocabularies as $vocabulary) {
 155         if($vocabulary->language) $form[$vocabulary->vid]['type']['#value'] = $form[$vocabulary->vid]['type']['#value'].'&nbsp('.$languages[$vocabulary->language].')';
 156       }
 157         break;
 158     case 'taxonomy_form_vocabulary': // Taxonomy vocabulary
 159       if(isset($form['vid'])) {
 160         $vocabulary = taxonomy_get_vocabulary($form['vid']['#value']);
 161       }
 162       $form['language'] = _i18n_language_select(isset($vocabulary) ? $vocabulary->language : i18n_get_lang(),t('This language will be set for all terms in this vocabulary'));
 163       break;
 164
 165     case 'taxonomy_form_term': // Taxonomy term
 166       if(isset($form['vid']) && is_numeric($form['vid'])) {
 167         $vocabulary = taxonomy_get_vocabulary($form['vid']);
 168       }
 169           $form['language'] = _i18n_language_select(isset($vocabulary) ? $vocabulary->language : i18n_get_lang());
 170       break;
 171
 172     default:
 173             // Content type settings
 174                   if (isset($form['type']) && $form['type']['#value'] .'_node_settings' == $form_id) {
 175                     $form['workflow']['i18n_node_'. $form['type']['#value']] = array(
 176                       '#type' => 'radios',
 177                       '#title' => t('Multilingual support'),
 178                       '#default_value' => variable_get('i18n_node_'. $form['type']['#value'], 0),
 179                       '#options' => array(t('Disabled'), t('Enabled')),
 180                       '#description' => t('Enables language field and multilingual support for this content type.'),
 181                     );
 182                   }
 183             // Node edit form
 184                   if (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id){
 185               // Language field
 186               if(variable_get('i18n_node_'.$form['type']['#value'], 0) && !isset($form['i18n']['language'])) {
 187           // Language field
 188           $form['i18n'] = array('#type' => 'fieldset', '#title' => t('Language'), '#collapsible' => TRUE, '#collapsed' => FALSE, '#weight' => -4);
 189           // Language will default to current only when creating a node
 190                 $language = isset($form['#node']->language) ? $form['#node']->language : (arg(1)=='add' ? i18n_get_lang() : '');
 191                 $form['i18n']['language'] = _i18n_language_select($language, t('If you change the Language, you must click on <i>Preview</i> to get the right Categories &amp; Terms for that language.'), -4);
 192               }
 193               // Correction for lang/node/nid aliases generated by path module
 194                                 // if($form['#node']->path && $form['#node']->path == i18n_get_lang().'/node/'.$form['#node']->nid){
 195               if($form['#node']->path) {
 196                 $alias=drupal_lookup_path('alias', 'node/'.$form['#node']->nid);
 197                 if($alias && $alias != 'node/'.$form['#node']->nid){
 198                   $form['#node']->path = $alias;
 199                 } else {
 200                   unset($form['#node']->path);
 201                 }
 202               }
 203           }
 204
 205   }
 206 }
 207
 208 /**
 209  * Implementation of hook_nodeapi
 210  * Updated for new table i18n_node
 211  */
 212 function i18n_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
 213   if (variable_get("i18n_node_$node->type", 0)) {
 214           switch ($op) {
 215       case 'load':
 216         return db_fetch_array(db_query("SELECT trid, language FROM {i18n_node} WHERE nid=%d", $node->nid));
 217       case 'insert':
 218       case 'update':
 219         db_query("DELETE FROM {i18n_node} WHERE nid=%d",$node->nid);
 220         if($node->language){
 221           db_query("INSERT INTO {i18n_node} (nid, trid, language) VALUES(%d, '%d', '%s')", $node->nid, $node->trid, $node->language);
 222         }
 223         break;
 224       case 'delete':
 225         db_query('DELETE FROM {i18n_node} WHERE nid=%d', $node->nid);
 226         break;
 227           }
 228   }
 229 }
 230
 231 /**
 232  * Helper function to create language selector
 233  */
 234 function _i18n_language_select($value ='', $description ='', $weight = -20){
 235   return array(
 236           '#type' => 'select',
 237           '#title' => t('Language'),
 238           '#default_value' => $value,
 239           '#options' => array_merge(array('' => ''), i18n_supported_languages()),
 240           '#description' => $description,
 241           '#weight' => $weight,
 242   );
 243 }
 244
 245 /**
 246  * Implementation of hook_taxonomy
 247  *
 248  * $edit parameter may be an array or an object !!
 249  */
 250 function i18n_taxonomy($op, $type, $edit = NULL) {
 251   $edit = (array)$edit;
 252   switch ("$type/$op") {
 253     case 'term/insert':
 254     case 'term/update':
 255             $language = isset($edit['language']) ? $edit['language'] : '';
 256       db_query("UPDATE {term_data} SET language='%s' WHERE tid=%d", $language, $edit['tid']);
 257       break;
 258     case 'vocabulary/insert':
 259     case 'vocabulary/update':
 260             $language = isset($edit['language']) ? $edit['language'] : '';
 261             db_query("UPDATE {vocabulary} SET language='%s' WHERE vid=%d", $language, $edit['vid']);
 262             if ($language && $op == 'update') {
 263               db_query("UPDATE {term_data} t SET t.language='%s' WHERE t.vid=%d", $edit['language'], $edit['vid']);
 264               drupal_set_message(t('Reset language for all terms.'));
 265             }
 266             break;
 267   }
 268 }
 269
 270 /**
 271  * More i18n API
 272  */
 273
 274 /**
 275  * This one expects to be called first from common.inc
 276  */
 277 function i18n_get_lang() {
 278   static $i18n_language;
 279   //see if the language is already set.
 280   if ($i18n_language) {
 281     return $i18n_language;
 282   } else {
 283     return $i18n_language = _i18n_get_lang();
 284   }
 285 }
 286
 287 // Note: do not call url() anymore, it will be called from l()
 288 function i18n_url($url, $lang) {
 289   // Strip prefix if default language
 290   if ($url) {
 291     return $lang.'/'.$url;
 292   } else {
 293     return $lang;
 294   }
 295 }
 296
 297 function i18n_node_get_lang($nid, $default = '') {
 298   $lang = db_result(db_query('SELECT language FROM {i18n_node} WHERE nid=%d',$nid));
 299   return $lang ? $lang : $default ;
 300 }
 301
 302 /**
 303  * Returns main language, two letter code
 304  */
 305 function i18n_get_main_lang($lang = NULL){
 306   $lang = $lang ? $lang : i18n_get_lang();
 307   return substr($lang, 2);
 308 }
 309
 310
 311 /**
 312  * Language block
 313  *
 314  * This is a simple language switcher which knows nothing about translations
 315  */
 316 function i18n_block($op = 'list', $delta = 0) {
 317   if ($op == 'list') {
 318     $blocks[0]['info'] = t('Language switcher');
 319   }
 320   elseif($op == 'view') {
 321     $blocks['subject'] = t('Languages');
 322     $blocks['content'] = theme('item_list', i18n_get_links($_GET['q']));
 323   }
 324
 325   return $blocks;
 326 }
 327
 328 /**
 329  * Function i18n_get_links
 330  *
 331  * Returns an array of urls for all languages, with or without names/flags
 332  */
 333 function i18n_get_links($path = '') {
 334   foreach(i18n_supported_languages() as $lang => $name){
 335     $links[$lang]= theme('i18n_link', $name, i18n_url($path, $lang), $lang);
 336   }
 337   return $links;
 338 }
 339
 340
 341 /**
 342  * Multilingual variables
 343  */
 344 function i18n_variable_init(){
 345   global $conf;
 346   global $i18n_conf;
 347   $lang = _i18n_get_lang();
 348   if($i18n_variables = variable_get('i18n_variables', '')){
 349     $i18n_conf = array();
 350     $variables = _i18n_variable_init();
 351     foreach($i18n_variables as $name){
 352       $i18n_conf[$name] = isset($variables[$name]) ? $variables[$name] : (isset($conf[$name]) ? $conf[$name] : '');
 353     }
 354     $conf = array_merge($conf, $i18n_conf);
 355   }
 356 }
 357
 358 function _i18n_variable_init(){
 359   $lang = _i18n_get_lang();
 360   $variables = array();
 361   if ($cached = cache_get('variables:'.$lang)) {
 362     $variables = unserialize($cached->data);
 363   }
 364   else {
 365     $result = db_query("SELECT * FROM {i18n_variable} WHERE language='%s'", $lang);
 366     while ($variable = db_fetch_object($result)) {
 367       $variables[$variable->name] = unserialize($variable->value);
 368     }
 369     cache_set('variables:'.$lang, serialize($variables));
 370   }
 371
 372   return $variables;
 373
 374 }
 375
 376 function _i18n_variable_exit(){
 377   global $i18n_conf;
 378   global $conf;
 379   $lang = _i18n_get_lang();
 380   if($i18n_conf){
 381     $variables = array_diff_assoc($i18n_conf, $conf);
 382     if($variables){
 383       foreach($variables as $name => $value){
 384         $i18n_conf[$name] = $conf[$name];
 385         db_query("DELETE FROM {i18n_variable} WHERE name='%s' AND language='%s'", $name, $lang );
 386         db_query("INSERT INTO {i18n_variable} (language, name, value) VALUES('%s', '%s', '%s')", $lang, $name, serialize($conf[$name]));
 387       }
 388       cache_set('variables:'.$lang, serialize($i18n_conf));
 389     }
 390   }
 391 }
 392
 393 /**
 394  * @name Themeable functions
 395  * @{
 396  */
 397
 398 /**
 399  * Produces a language link with the right flag
 400  */
 401 function theme_i18n_link($text, $target, $lang, $separator='&nbsp;'){
 402   $output = '<span class="i18n-link">';
 403   $attributes = ($lang == i18n_get_lang()) ? array('class' => 'active') : NULL;
 404   $output .= l(theme('i18n_language_icon', $lang), $target, $attributes, NULL, NULL, FALSE, TRUE);
 405   $output .= $separator;
 406   $output .= l($text, $target, $attributes, NULL, NULL, FALSE, TRUE);
 407   $output .= '</span>';
 408   return $output;
 409 }
 410
 411 function theme_i18n_language_icon($lang){
 412   if ($path = variable_get('i18n_icon_path', drupal_get_path('module', 'i18n').'/flags/*.png')) {
 413     $languages = i18n_supported_languages();
 414     $src = base_path().str_replace('*', $lang, $path);
 415     list($width, $height) = explode('x', variable_get('i18n_flags_size', '16x12'));
 416     $attribs = array('class' => 'i18n-icon', 'width' => $width, 'height' => $height, 'alt' => $languages[$lang]);
 417     return "<img src=\"$src\" ".drupal_attributes($attribs)." />";
 418   }
 419 }
 420
 421 /* @} */
 422 ?>