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<?php /** * Class for working with PO files * * @version $Id: po.php 718 2012-10-31 00:32:02Z nbachiyski $ * @package pomo * @subpackage po */
require_once dirname(__FILE__) . '/translations.php';
define('PO_MAX_LINE_LEN', 79);
ini_set('auto_detect_line_endings', 1);
/** * Routines for working with PO files */ if ( !class_exists( 'PO' ) ): class PO extends Gettext_Translations {
var $comments_before_headers = '';
/** * Exports headers to a PO entry * * @return string msgid/msgstr PO entry for this PO file headers, doesn't contain newline at the end */ function export_headers() { $header_string = ''; foreach($this->headers as $header => $value) { $header_string.= "$header: $value\n"; } $poified = PO::poify($header_string); if ($this->comments_before_headers) $before_headers = $this->prepend_each_line(rtrim($this->comments_before_headers)."\n", '# '); else $before_headers = ''; return rtrim("{$before_headers}msgid \"\"\nmsgstr $poified"); }
/** * Exports all entries to PO format * * @return string sequence of mgsgid/msgstr PO strings, doesn't containt newline at the end */ function export_entries() { //TODO sorting return implode("\n\n", array_map(array('PO', 'export_entry'), $this->entries)); }
/** * Exports the whole PO file as a string * * @param bool $include_headers whether to include the headers in the export * @return string ready for inclusion in PO file string for headers and all the enrtries */ function export($include_headers = true) { $res = ''; if ($include_headers) { $res .= $this->export_headers(); $res .= "\n\n"; } $res .= $this->export_entries(); return $res; }
/** * Same as {@link export}, but writes the result to a file * * @param string $filename where to write the PO string * @param bool $include_headers whether to include tje headers in the export * @return bool true on success, false on error */ function export_to_file($filename, $include_headers = true) { $fh = fopen($filename, 'w'); if (false === $fh) return false; $export = $this->export($include_headers); $res = fwrite($fh, $export); if (false === $res) return false; return fclose($fh); }
/** * Text to include as a comment before the start of the PO contents * * Doesn't need to include # in the beginning of lines, these are added automatically */ function set_comment_before_headers( $text ) { $this->comments_before_headers = $text; }
/** * Formats a string in PO-style * * @static * @param string $string the string to format * @return string the poified string */ function poify($string) { $quote = '"'; $slash = '\\'; $newline = "\n";
$replaces = array( "$slash" => "$slash$slash", "$quote" => "$slash$quote", "\t" => '\t', );
$string = str_replace(array_keys($replaces), array_values($replaces), $string);
$po = $quote.implode("${slash}n$quote$newline$quote", explode($newline, $string)).$quote; // add empty string on first line for readbility if (false !== strpos($string, $newline) && (substr_count($string, $newline) > 1 || !($newline === substr($string, -strlen($newline))))) { $po = "$quote$quote$newline$po"; } // remove empty strings $po = str_replace("$newline$quote$quote", '', $po); return $po; }
/** * Gives back the original string from a PO-formatted string * * @static * @param string $string PO-formatted string * @return string enascaped string */ function unpoify($string) { $escapes = array('t' => "\t", 'n' => "\n", '\\' => '\\'); $lines = array_map('trim', explode("\n", $string)); $lines = array_map(array('PO', 'trim_quotes'), $lines); $unpoified = ''; $previous_is_backslash = false; foreach($lines as $line) { preg_match_all('/./u', $line, $chars); $chars = $chars[0]; foreach($chars as $char) { if (!$previous_is_backslash) { if ('\\' == $char) $previous_is_backslash = true; else $unpoified .= $char; } else { $previous_is_backslash = false; $unpoified .= isset($escapes[$char])? $escapes[$char] : $char; } } } return $unpoified; }
/** * Inserts $with in the beginning of every new line of $string and * returns the modified string * * @static * @param string $string prepend lines in this string * @param string $with prepend lines with this string */ function prepend_each_line($string, $with) { $php_with = var_export($with, true); $lines = explode("\n", $string); // do not prepend the string on the last empty line, artefact by explode if ("\n" == substr($string, -1)) unset($lines[count($lines) - 1]); $res = implode("\n", array_map(create_function('$x', "return $php_with.\$x;"), $lines)); // give back the empty line, we ignored above if ("\n" == substr($string, -1)) $res .= "\n"; return $res; }
/** * Prepare a text as a comment -- wraps the lines and prepends # * and a special character to each line * * @access private * @param string $text the comment text * @param string $char character to denote a special PO comment, * like :, default is a space */ function comment_block($text, $char=' ') { $text = wordwrap($text, PO_MAX_LINE_LEN - 3); return PO::prepend_each_line($text, "#$char "); }
/** * Builds a string from the entry for inclusion in PO file * * @static * @param Translation_Entry &$entry the entry to convert to po string * @return false|string PO-style formatted string for the entry or * false if the entry is empty */ function export_entry(&$entry) { if (is_null($entry->singular)) return false; $po = array(); if (!empty($entry->translator_comments)) $po[] = PO::comment_block($entry->translator_comments); if (!empty($entry->extracted_comments)) $po[] = PO::comment_block($entry->extracted_comments, '.'); if (!empty($entry->references)) $po[] = PO::comment_block(implode(' ', $entry->references), ':'); if (!empty($entry->flags)) $po[] = PO::comment_block(implode(", ", $entry->flags), ','); if (!is_null($entry->context)) $po[] = 'msgctxt '.PO::poify($entry->context); $po[] = 'msgid '.PO::poify($entry->singular); if (!$entry->is_plural) { $translation = empty($entry->translations)? '' : $entry->translations[0]; $po[] = 'msgstr '.PO::poify($translation); } else { $po[] = 'msgid_plural '.PO::poify($entry->plural); $translations = empty($entry->translations)? array('', '') : $entry->translations; foreach($translations as $i => $translation) { $po[] = "msgstr[$i] ".PO::poify($translation); } } return implode("\n", $po); }
/** * @param string $filename * @return boolean */ function import_from_file($filename) { $f = fopen($filename, 'r'); if (!$f) return false; $lineno = 0; while (true) { $res = $this->read_entry($f, $lineno); if (!$res) break; if ($res['entry']->singular == '') { $this->set_headers($this->make_headers($res['entry']->translations[0])); } else { $this->add_entry($res['entry']); } } PO::read_line($f, 'clear'); if ( false === $res ) { return false; } if ( ! $this->headers && ! $this->entries ) { return false; } return true; }
/** * @param resource $f * @param int $lineno * @return null|false|array */ function read_entry($f, $lineno = 0) { $entry = new Translation_Entry(); // where were we in the last step // can be: comment, msgctxt, msgid, msgid_plural, msgstr, msgstr_plural $context = ''; $msgstr_index = 0; $is_final = create_function('$context', 'return $context == "msgstr" || $context == "msgstr_plural";'); while (true) { $lineno++; $line = PO::read_line($f); if (!$line) { if (feof($f)) { if ($is_final($context)) break; elseif (!$context) // we haven't read a line and eof came return null; else return false; } else { return false; } } if ($line == "\n") continue; $line = trim($line); if (preg_match('/^#/', $line, $m)) { // the comment is the start of a new entry if ($is_final($context)) { PO::read_line($f, 'put-back'); $lineno--; break; } // comments have to be at the beginning if ($context && $context != 'comment') { return false; } // add comment $this->add_comment_to_entry($entry, $line); } elseif (preg_match('/^msgctxt\s+(".*")/', $line, $m)) { if ($is_final($context)) { PO::read_line($f, 'put-back'); $lineno--; break; } if ($context && $context != 'comment') { return false; } $context = 'msgctxt'; $entry->context .= PO::unpoify($m[1]); } elseif (preg_match('/^msgid\s+(".*")/', $line, $m)) { if ($is_final($context)) { PO::read_line($f, 'put-back'); $lineno--; break; } if ($context && $context != 'msgctxt' && $context != 'comment') { return false; } $context = 'msgid'; $entry->singular .= PO::unpoify($m[1]); } elseif (preg_match('/^msgid_plural\s+(".*")/', $line, $m)) { if ($context != 'msgid') { return false; } $context = 'msgid_plural'; $entry->is_plural = true; $entry->plural .= PO::unpoify($m[1]); } elseif (preg_match('/^msgstr\s+(".*")/', $line, $m)) { if ($context != 'msgid') { return false; } $context = 'msgstr'; $entry->translations = array(PO::unpoify($m[1])); } elseif (preg_match('/^msgstr\[(\d+)\]\s+(".*")/', $line, $m)) { if ($context != 'msgid_plural' && $context != 'msgstr_plural') { return false; } $context = 'msgstr_plural'; $msgstr_index = $m[1]; $entry->translations[$m[1]] = PO::unpoify($m[2]); } elseif (preg_match('/^".*"$/', $line)) { $unpoified = PO::unpoify($line); switch ($context) { case 'msgid': $entry->singular .= $unpoified; break; case 'msgctxt': $entry->context .= $unpoified; break; case 'msgid_plural': $entry->plural .= $unpoified; break; case 'msgstr': $entry->translations[0] .= $unpoified; break; case 'msgstr_plural': $entry->translations[$msgstr_index] .= $unpoified; break; default: return false; } } else { return false; } } if (array() == array_filter($entry->translations, create_function('$t', 'return $t || "0" === $t;'))) { $entry->translations = array(); } return array('entry' => $entry, 'lineno' => $lineno); }
/** * @staticvar string $last_line * @staticvar boolean $use_last_line * @param resource $f * @param string $action * @return boolean */ function read_line($f, $action = 'read') { static $last_line = ''; static $use_last_line = false; if ('clear' == $action) { $last_line = ''; return true; } if ('put-back' == $action) { $use_last_line = true; return true; } $line = $use_last_line? $last_line : fgets($f); $line = ( "\r\n" == substr( $line, -2 ) ) ? rtrim( $line, "\r\n" ) . "\n" : $line; $last_line = $line; $use_last_line = false; return $line; }
/** * @param Translation_Entry $entry * @param string $po_comment_line */ function add_comment_to_entry(&$entry, $po_comment_line) { $first_two = substr($po_comment_line, 0, 2); $comment = trim(substr($po_comment_line, 2)); if ('#:' == $first_two) { $entry->references = array_merge($entry->references, preg_split('/\s+/', $comment)); } elseif ('#.' == $first_two) { $entry->extracted_comments = trim($entry->extracted_comments . "\n" . $comment); } elseif ('#,' == $first_two) { $entry->flags = array_merge($entry->flags, preg_split('/,\s*/', $comment)); } else { $entry->translator_comments = trim($entry->translator_comments . "\n" . $comment); } }
/** * @param string $s * @return sring */ function trim_quotes($s) { if ( substr($s, 0, 1) == '"') $s = substr($s, 1); if ( substr($s, -1, 1) == '"') $s = substr($s, 0, -1); return $s; } } endif;
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