<?php
  /**
   * @package php-font-lib
   * @link    http://php-font-lib.googlecode.com/
   * @author  Fabien Ménager <fabien.menager@gmail.com>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   * @version $Id: font_table_name.cls.php 36 2011-11-03 23:02:06Z fabien.menager $
   */
  
  require_once dirname(__FILE__)."/font_table_name_record.cls.php";
  
  /**
   * `name` font table.
   * 
   * @package php-font-lib
   */
  class Font_Table_name extends Font_Table {
    private static $header_format = array(
      "format"       => self::uint16,
      "count"        => self::uint16,
      "stringOffset" => self::uint16,
    );
    
    protected function _parse(){
      $font = $this->getFont();
      $data = array();
      
      $tableOffset = $font->pos();
      
      $data = $font->unpack(self::$header_format);
      
      $records = array();
      for($i = 0; $i < $data["count"]; $i++) {
        $record = new Font_Table_name_Record();
        $record_data = $font->unpack(Font_Table_name_Record::$format);
        $record->map($record_data);
        
        $records[] = $record;
      }
      
      $names = array();
      foreach($records as $record) {
        $font->seek($tableOffset + $data["stringOffset"] + $record->offset);
        $s = $font->read($record->length);
        $record->string = Font::UTF16ToUTF8($s);
        $names[$record->nameID] = $record;
      }
      
      $data["records"] = $names;
      
      $this->data = $data;
    }
    
    protected function _encode(){
      $font = $this->getFont();
      
      $records = $this->data["records"];
      $count_records = count($records);
      
      $this->data["count"] = $count_records;
      $this->data["stringOffset"] = 6 + $count_records * 12; // 6 => uint16 * 3, 12 => sizeof self::$record_format
      
      $tableOffset = $font->pos();
      
      $length = $font->pack(self::$header_format, $this->data);
      
      $recordsOffset = $font->pos();
      
      $offset = 0;
      foreach($records as $record) {
        $record->length = mb_strlen($record->getUTF16(), "8bit");
        $record->offset = $offset;
        $offset += $record->length;
        $length += $font->pack(Font_Table_name_Record::$format, (array)$record);
      }
      
      foreach($records as $record) {
        $str = $record->getUTF16();
        $length += $font->write($str, mb_strlen($str, "8bit"));
      }
      
      return $length;
    }
  }