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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Pdf
* @subpackage FileParser
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Font.php 20096 2010-01-06 02:05:09Z bkarwin $
*/
/** Internally used classes */
require_once 'Zend/Pdf/Font.php';
/** Zend_Pdf_FileParser */
require_once 'Zend/Pdf/FileParser.php';
/**
* Abstract helper class for {@link Zend_Pdf_Font} that parses font files.
*
* Defines the public interface for concrete subclasses which are responsible
* for parsing the raw binary data from the font file on disk. Also provides
* a debug logging interface and a couple of shared utility methods.
*
* @package Zend_Pdf
* @subpackage FileParser
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Pdf_FileParser_Font extends Zend_Pdf_FileParser
{
/**** Instance Variables ****/
/**
* Array of parsed font properties. Used with {@link __get()} and
* {@link __set()}.
* @var array
*/
private $_fontProperties = array();
/**
* Flag indicating whether or not debug logging is active.
* @var boolean
*/
private $_debug = false;
/**** Public Interface ****/
/* Object Lifecycle */
/**
* Object constructor.
*
* Validates the data source and enables debug logging if so configured.
*
* @param Zend_Pdf_FileParserDataSource $dataSource
* @throws Zend_Pdf_Exception
*/
public function __construct(Zend_Pdf_FileParserDataSource $dataSource)
{
parent::__construct($dataSource);
$this->fontType = Zend_Pdf_Font::TYPE_UNKNOWN;
}
/* Accessors */
/**
* Get handler
*
* @param string $property
* @return mixed
*/
public function __get($property)
{
if (isset($this->_fontProperties[$property])) {
return $this->_fontProperties[$property];
} else {
return null;
}
}
/* NOTE: The set handler is defined below in the internal methods group. */
/* Parser Methods */
/**
* Reads the Unicode UTF-16-encoded string from the binary file at the
* current offset location. Overridden to fix return character set at UTF-16BE.
*
* @todo Deal with to-dos in the parent method.
*
* @param integer $byteCount Number of bytes (characters * 2) to return.
* @param integer $byteOrder (optional) Big- or little-endian byte order.
* Use the BYTE_ORDER_ constants defined in {@link Zend_Pdf_FileParser}. If
* omitted, uses big-endian.
* @param string $characterSet (optional) --Ignored--
* @return string
* @throws Zend_Pdf_Exception
*/
public function readStringUTF16($byteCount,
$byteOrder = Zend_Pdf_FileParser::BYTE_ORDER_BIG_ENDIAN,
$characterSet = '')
{
return parent::readStringUTF16($byteCount, $byteOrder, 'UTF-16BE');
}
/**
* Reads the Mac Roman-encoded string from the binary file at the current
* offset location. Overridden to fix return character set at UTF-16BE.
*
* @param integer $byteCount Number of bytes (characters) to return.
* @param string $characterSet (optional) --Ignored--
* @return string
* @throws Zend_Pdf_Exception
*/
public function readStringMacRoman($byteCount, $characterSet = '')
{
return parent::readStringMacRoman($byteCount, 'UTF-16BE');
}
/**
* Reads the Pascal string from the binary file at the current offset
* location. Overridden to fix return character set at UTF-16BE.
*
* @param string $characterSet (optional) --Ignored--
* @param integer $lengthBytes (optional) Number of bytes that make up the
* length. Default is 1.
* @return string
* @throws Zend_Pdf_Exception
*/
public function readStringPascal($characterSet = '', $lengthBytes = 1)
{
return parent::readStringPascal('UTF-16BE');
}
/* Utility Methods */
/**
* Writes the entire font properties array to STDOUT. Used only for debugging.
*/
public function writeDebug()
{
print_r($this->_fontProperties);
}
/**** Internal Methods ****/
/* Internal Accessors */
/**
* Set handler
*
* NOTE: This method is protected. Other classes may freely interrogate
* the font properties, but only this and its subclasses may set them.
*
* @param string $property
* @param mixed $value
*/
public function __set($property, $value)
{
if ($value === null) {
unset($this->_fontProperties[$property]);
} else {
$this->_fontProperties[$property] = $value;
}
}
/* Internal Utility Methods */
/**
* If debug logging is enabled, writes the log message.
*
* The log message is a sprintf() style string and any number of arguments
* may accompany it as additional parameters.
*
* @param string $message
* @param mixed (optional, multiple) Additional arguments
*/
protected function _debugLog($message)
{
if (! $this->_debug) {
return;
}
if (func_num_args() > 1) {
$args = func_get_args();
$message = array_shift($args);
$message = vsprintf($message, $args);
}
require_once 'Zend/Log.php';
$logger = new Zend_Log();
$logger->log($message, Zend_Log::DEBUG);
}
}
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