--- /dev/null
+<?php
+/**
+ * Class for a set of entries for translation and their associated headers
+ *
+ * @version $Id: translations.php 114 2009-05-11 17:30:38Z nbachiyski $
+ * @package pomo
+ * @subpackage translations
+ */
+
+require_once dirname(__FILE__) . '/entry.php';
+
+class Translations {
+ var $entries = array();
+ var $headers = array();
+
+ /**
+ * Add entry to the PO structure
+ *
+ * @param object &$entry
+ * @return bool true on success, false if the entry doesn't have a key
+ */
+ function add_entry($entry) {
+ if (is_array($entry)) {
+ $entry = new Translation_Entry($entry);
+ }
+ $key = $entry->key();
+ if (false === $key) return false;
+ $this->entries[$key] = $entry;
+ return true;
+ }
+
+ /**
+ * Sets $header PO header to $value
+ *
+ * If the header already exists, it will be overwritten
+ *
+ * TODO: this should be out of this class, it is gettext specific
+ *
+ * @param string $header header name, without trailing :
+ * @param string $value header value, without trailing \n
+ */
+ function set_header($header, $value) {
+ $this->headers[$header] = $value;
+ }
+
+ function set_headers(&$headers) {
+ foreach($headers as $header => $value) {
+ $this->set_header($header, $value);
+ }
+ }
+
+ function get_header($header) {
+ return isset($this->headers[$header])? $this->headers[$header] : false;
+ }
+
+ function translate_entry(&$entry) {
+ $key = $entry->key();
+ return isset($this->entries[$key])? $this->entries[$key] : false;
+ }
+
+ function translate($singular, $context=null) {
+ $entry = new Translation_Entry(array('singular' => $singular, 'context' => $context));
+ $translated = $this->translate_entry($entry);
+ return ($translated && !empty($translated->translations))? $translated->translations[0] : $singular;
+ }
+
+ /**
+ * Given the number of items, returns the 0-based index of the plural form to use
+ *
+ * Here, in the base Translations class, the commong logic for English is implmented:
+ * 0 if there is one element, 1 otherwise
+ *
+ * This function should be overrided by the sub-classes. For example MO/PO can derive the logic
+ * from their headers.
+ *
+ * @param integer $count number of items
+ */
+ function select_plural_form($count) {
+ return 1 == $count? 0 : 1;
+ }
+
+ function get_plural_forms_count() {
+ return 2;
+ }
+
+ function translate_plural($singular, $plural, $count, $context = null) {
+ $entry = new Translation_Entry(array('singular' => $singular, 'plural' => $plural, 'context' => $context));
+ $translated = $this->translate_entry($entry);
+ $index = $this->select_plural_form($count);
+ $total_plural_forms = $this->get_plural_forms_count();
+ if ($translated && 0 <= $index && $index < $total_plural_forms &&
+ is_array($translated->translations) &&
+ isset($translated->translations[$index]))
+ return $translated->translations[$index];
+ else
+ return 1 == $count? $singular : $plural;
+ }
+
+ /**
+ * Merge $other in the current object.
+ *
+ * @param Object &$other Another Translation object, whose translations will be merged in this one
+ * @return void
+ **/
+ function merge_with(&$other) {
+ $this->entries = array_merge($this->entries, $other->entries);
+ }
+}
+
+class Gettext_Translations extends Translations {
+ /**
+ * The gettext implmentation of select_plural_form.
+ *
+ * It lives in this class, because there are more than one descendand, which will use it and
+ * they can't share it effectively.
+ *
+ */
+ function gettext_select_plural_form($count) {
+ if (!isset($this->_gettext_select_plural_form) || is_null($this->_gettext_select_plural_form)) {
+ $plural_header = $this->get_header('Plural-Forms');
+ $this->_gettext_select_plural_form = $this->_make_gettext_select_plural_form($plural_header);
+ }
+ return call_user_func($this->_gettext_select_plural_form, $count);
+ }
+
+ /**
+ * Makes a function, which will return the right translation index, according to the
+ * plural forms header
+ */
+ function _make_gettext_select_plural_form($plural_header) {
+ $res = create_function('$count', 'return 1 == $count? 0 : 1;');
+ if ($plural_header && (preg_match('/^\s*nplurals\s*=\s*(\d+)\s*;\s+plural\s*=\s*(.+)$/', $plural_header, $matches))) {
+ $nplurals = (int)$matches[1];
+ $this->_nplurals = $nplurals;
+ $plural_expr = trim($this->_parenthesize_plural_exression($matches[2]));
+ $plural_expr = str_replace('n', '$n', $plural_expr);
+ $func_body = "
+ \$index = (int)($plural_expr);
+ return (\$index < $nplurals)? \$index : $nplurals - 1;";
+ $res = create_function('$n', $func_body);
+ }
+ return $res;
+ }
+
+ /**
+ * Adds parantheses to the inner parts of ternary operators in
+ * plural expressions, because PHP evaluates ternary oerators from left to right
+ *
+ * @param string $expression the expression without parentheses
+ * @return string the expression with parentheses added
+ */
+ function _parenthesize_plural_exression($expression) {
+ $expression .= ';';
+ $res = '';
+ $depth = 0;
+ for ($i = 0; $i < strlen($expression); ++$i) {
+ $char = $expression[$i];
+ switch ($char) {
+ case '?':
+ $res .= ' ? (';
+ $depth++;
+ break;
+ case ':':
+ $res .= ') : (';
+ break;
+ case ';':
+ $res .= str_repeat(')', $depth) . ';';
+ $depth= 0;
+ break;
+ default:
+ $res .= $char;
+ }
+ }
+ return rtrim($res, ';');
+ }
+
+ function make_headers($translation) {
+ $headers = array();
+ // sometimes \ns are used instead of real new lines
+ $translation = str_replace('\n', "\n", $translation);
+ $lines = explode("\n", $translation);
+ foreach($lines as $line) {
+ $parts = explode(':', $line, 2);
+ if (!isset($parts[1])) continue;
+ $headers[trim($parts[0])] = trim($parts[1]);
+ }
+ return $headers;
+ }
+
+ function set_header($header, $value) {
+ parent::set_header($header, $value);
+ if ('Plural-Forms' == $header)
+ $this->_gettext_select_plural_form = $this->_make_gettext_select_plural_form($value);
+ }
+
+
+}
+
+?>
projects / vuplus_webkit / blobdiff