<?php
/**
 * @package php-font-lib
 * @link    https://github.com/PhenX/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();
    }
}