<?php
  /**
   * @package php-font-lib
   * @link    https://github.com/dompdf/php-font-lib
   * @author  Fabien Ménager <fabien.menager@gmail.com>
   * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
   */
  namespace FontLib\Table;
  
  use FontLib\TrueType\File;
  use FontLib\Font;
  use FontLib\BinaryStream;
  
  /**
   * Generic font table.
   *
   * @package php-font-lib
   */
  class Table extends BinaryStream {
    /**
     * @var DirectoryEntry
     */
    protected $entry;
    protected $def = array();
  
    public $data;
  
    final public function __construct(DirectoryEntry $entry) {
      $this->entry = $entry;
      $entry->setTable($this);
    }
  
    /**
     * @return File
     */
    public function getFont() {
      return $this->entry->getFont();
    }
  
    protected function _encode() {
      if (empty($this->data)) {
        Font::d("  >> Table is empty");
  
        return 0;
      }
  
      return $this->getFont()->pack($this->def, $this->data);
    }
  
    protected function _parse() {
      $this->data = $this->getFont()->unpack($this->def);
    }
  
    protected function _parseRaw() {
      $this->data = $this->getFont()->read($this->entry->length);
    }
  
    protected function _encodeRaw() {
      return $this->getFont()->write($this->data, $this->entry->length);
    }
  
    public function toHTML() {
      return "<pre>" . var_export($this->data, true) . "</pre>";
    }
  
    final public function encode() {
      $this->entry->startWrite();
  
      if (false && empty($this->def)) {
        $length = $this->_encodeRaw();
      }
      else {
        $length = $this->_encode();
      }
  
      $this->entry->endWrite();
  
      return $length;
    }
  
    final public function parse() {
      $this->entry->startRead();
  
      if (false && empty($this->def)) {
        $this->_parseRaw();
      }
      else {
        $this->_parse();
      }
  
      $this->entry->endRead();
    }
  }