437 lines
12 KiB
PHP
437 lines
12 KiB
PHP
<?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
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
* @version $Id: ElementFactory.php 18993 2009-11-15 17:09:16Z alexander $
|
|
*/
|
|
|
|
|
|
/** Zend_Pdf_ElementFactory_Interface */
|
|
require_once 'Zend/Pdf/ElementFactory/Interface.php';
|
|
|
|
/**
|
|
* PDF element factory.
|
|
* Responsibility is to log PDF changes
|
|
*
|
|
* @package Zend_Pdf
|
|
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
|
|
* @license http://framework.zend.com/license/new-bsd New BSD License
|
|
*/
|
|
class Zend_Pdf_ElementFactory implements Zend_Pdf_ElementFactory_Interface
|
|
{
|
|
/**
|
|
* List of the modified objects.
|
|
* Also contains new and removed objects
|
|
*
|
|
* Array: ojbectNumber => Zend_Pdf_Element_Object
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_modifiedObjects = array();
|
|
|
|
/**
|
|
* List of the removed objects
|
|
*
|
|
* Array: ojbectNumber => Zend_Pdf_Element_Object
|
|
*
|
|
* @var SplObjectStorage
|
|
*/
|
|
private $_removedObjects;
|
|
|
|
/**
|
|
* List of registered objects.
|
|
* Used for resources clean up when factory is destroyed.
|
|
*
|
|
* Array of Zend_Pdf_Element objects
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_registeredObjects = array();
|
|
|
|
/**
|
|
* PDF object counter.
|
|
* Actually it's an object number for new PDF object
|
|
*
|
|
* @var integer
|
|
*/
|
|
private $_objectCount;
|
|
|
|
|
|
/**
|
|
* List of the attached object factories.
|
|
* Array of Zend_Pdf_ElementFactory_Interface objects
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_attachedFactories = array();
|
|
|
|
|
|
/**
|
|
* Factory internal id
|
|
*
|
|
* @var integer
|
|
*/
|
|
private $_factoryId;
|
|
|
|
/**
|
|
* Identity, used for factory id generation
|
|
*
|
|
* @var integer
|
|
*/
|
|
private static $_identity = 0;
|
|
|
|
|
|
/**
|
|
* Internal cache to save calculated shifts
|
|
*
|
|
* @var array
|
|
*/
|
|
private $_shiftCalculationCache = array();
|
|
|
|
|
|
/**
|
|
* Object constructor
|
|
*
|
|
* @param integer $objCount
|
|
*/
|
|
public function __construct($objCount)
|
|
{
|
|
$this->_objectCount = (int)$objCount;
|
|
$this->_factoryId = self::$_identity++;
|
|
$this->_removedObjects = new SplObjectStorage();
|
|
}
|
|
|
|
|
|
/**
|
|
* Factory generator
|
|
*
|
|
* @param integer $objCount
|
|
* @return Zend_Pdf_ElementFactory_Interface
|
|
*/
|
|
static public function createFactory($objCount)
|
|
{
|
|
require_once 'Zend/Pdf/ElementFactory/Proxy.php';
|
|
return new Zend_Pdf_ElementFactory_Proxy(new Zend_Pdf_ElementFactory($objCount));
|
|
}
|
|
|
|
/**
|
|
* Close factory and clean-up resources
|
|
*
|
|
* @internal
|
|
*/
|
|
public function close()
|
|
{
|
|
$this->_modifiedObjects = null;
|
|
$this->_removedObjects = null;
|
|
$this->_attachedFactories = null;
|
|
|
|
foreach ($this->_registeredObjects as $obj) {
|
|
$obj->cleanUp();
|
|
}
|
|
$this->_registeredObjects = null;
|
|
}
|
|
|
|
/**
|
|
* Get source factory object
|
|
*
|
|
* @return Zend_Pdf_ElementFactory
|
|
*/
|
|
public function resolve()
|
|
{
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Get factory ID
|
|
*
|
|
* @return integer
|
|
*/
|
|
public function getId()
|
|
{
|
|
return $this->_factoryId;
|
|
}
|
|
|
|
/**
|
|
* Set object counter
|
|
*
|
|
* @param integer $objCount
|
|
*/
|
|
public function setObjectCount($objCount)
|
|
{
|
|
$this->_objectCount = (int)$objCount;
|
|
}
|
|
|
|
/**
|
|
* Get object counter
|
|
*
|
|
* @return integer
|
|
*/
|
|
public function getObjectCount()
|
|
{
|
|
$count = $this->_objectCount;
|
|
|
|
foreach ($this->_attachedFactories as $attached) {
|
|
$count += $attached->getObjectCount() - 1; // -1 as "0" object is a special case and shared between factories
|
|
}
|
|
|
|
return $count;
|
|
}
|
|
|
|
|
|
/**
|
|
* Attach factory to the current;
|
|
*
|
|
* @param Zend_Pdf_ElementFactory_Interface $factory
|
|
*/
|
|
public function attach(Zend_Pdf_ElementFactory_Interface $factory)
|
|
{
|
|
if ( $factory === $this || isset($this->_attachedFactories[$factory->getId()])) {
|
|
/**
|
|
* Don't attach factory twice.
|
|
* We do not check recusively because of nature of attach operation
|
|
* (Pages are always attached to the Documents, Fonts are always attached
|
|
* to the pages even if pages already use Document level object factory and so on)
|
|
*/
|
|
return;
|
|
}
|
|
|
|
$this->_attachedFactories[$factory->getId()] = $factory;
|
|
}
|
|
|
|
|
|
/**
|
|
* Calculate object enumeration shift.
|
|
*
|
|
* @param Zend_Pdf_ElementFactory_Interface $factory
|
|
* @return integer
|
|
*/
|
|
public function calculateShift(Zend_Pdf_ElementFactory_Interface $factory)
|
|
{
|
|
if ($factory === $this) {
|
|
return 0;
|
|
}
|
|
|
|
if (isset($this->_shiftCalculationCache[$factory->_factoryId])) {
|
|
return $this->_shiftCalculationCache[$factory->_factoryId];
|
|
}
|
|
|
|
$shift = $this->_objectCount - 1;
|
|
|
|
foreach ($this->_attachedFactories as $subFactory) {
|
|
$subFactoryShift = $subFactory->calculateShift($factory);
|
|
|
|
if ($subFactoryShift != -1) {
|
|
// context found
|
|
$this->_shiftCalculationCache[$factory->_factoryId] = $shift + $subFactoryShift;
|
|
return $shift + $subFactoryShift;
|
|
} else {
|
|
$shift += $subFactory->getObjectCount()-1;
|
|
}
|
|
}
|
|
|
|
$this->_shiftCalculationCache[$factory->_factoryId] = -1;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Clean enumeration shift cache.
|
|
* Has to be used after PDF render operation to let followed updates be correct.
|
|
*/
|
|
public function cleanEnumerationShiftCache()
|
|
{
|
|
$this->_shiftCalculationCache = array();
|
|
|
|
foreach ($this->_attachedFactories as $attached) {
|
|
$attached->cleanEnumerationShiftCache();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Retrive object enumeration shift.
|
|
*
|
|
* @param Zend_Pdf_ElementFactory_Interface $factory
|
|
* @return integer
|
|
* @throws Zend_Pdf_Exception
|
|
*/
|
|
public function getEnumerationShift(Zend_Pdf_ElementFactory_Interface $factory)
|
|
{
|
|
if (($shift = $this->calculateShift($factory)) == -1) {
|
|
require_once 'Zend/Pdf/Exception.php';
|
|
throw new Zend_Pdf_Exception('Wrong object context');
|
|
}
|
|
|
|
return $shift;
|
|
}
|
|
|
|
/**
|
|
* Mark object as modified in context of current factory.
|
|
*
|
|
* @param Zend_Pdf_Element_Object $obj
|
|
* @throws Zend_Pdf_Exception
|
|
*/
|
|
public function markAsModified(Zend_Pdf_Element_Object $obj)
|
|
{
|
|
if ($obj->getFactory() !== $this) {
|
|
require_once 'Zend/Pdf/Exception.php';
|
|
throw new Zend_Pdf_Exception('Object is not generated by this factory');
|
|
}
|
|
|
|
$this->_modifiedObjects[$obj->getObjNum()] = $obj;
|
|
}
|
|
|
|
|
|
/**
|
|
* Remove object in context of current factory.
|
|
*
|
|
* @param Zend_Pdf_Element_Object $obj
|
|
* @throws Zend_Pdf_Exception
|
|
*/
|
|
public function remove(Zend_Pdf_Element_Object $obj)
|
|
{
|
|
if (!$obj->compareFactory($this)) {
|
|
require_once 'Zend/Pdf/Exception.php';
|
|
throw new Zend_Pdf_Exception('Object is not generated by this factory');
|
|
}
|
|
|
|
$this->_modifiedObjects[$obj->getObjNum()] = $obj;
|
|
$this->_removedObjects->attach($obj);
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate new Zend_Pdf_Element_Object
|
|
*
|
|
* @todo Reusage of the freed object. It's not a support of new feature, but only improvement.
|
|
*
|
|
* @param Zend_Pdf_Element $objectValue
|
|
* @return Zend_Pdf_Element_Object
|
|
*/
|
|
public function newObject(Zend_Pdf_Element $objectValue)
|
|
{
|
|
require_once 'Zend/Pdf/Element/Object.php';
|
|
$obj = new Zend_Pdf_Element_Object($objectValue, $this->_objectCount++, 0, $this);
|
|
$this->_modifiedObjects[$obj->getObjNum()] = $obj;
|
|
return $obj;
|
|
}
|
|
|
|
/**
|
|
* Generate new Zend_Pdf_Element_Object_Stream
|
|
*
|
|
* @todo Reusage of the freed object. It's not a support of new feature, but only improvement.
|
|
*
|
|
* @param mixed $objectValue
|
|
* @return Zend_Pdf_Element_Object_Stream
|
|
*/
|
|
public function newStreamObject($streamValue)
|
|
{
|
|
require_once 'Zend/Pdf/Element/Object/Stream.php';
|
|
$obj = new Zend_Pdf_Element_Object_Stream($streamValue, $this->_objectCount++, 0, $this);
|
|
$this->_modifiedObjects[$obj->getObjNum()] = $obj;
|
|
return $obj;
|
|
}
|
|
|
|
|
|
/**
|
|
* Enumerate modified objects.
|
|
* Returns array of Zend_Pdf_UpdateInfoContainer
|
|
*
|
|
* @param Zend_Pdf_ElementFactory_Interface $rootFactory
|
|
* @return array
|
|
*/
|
|
public function listModifiedObjects($rootFactory = null)
|
|
{
|
|
if ($rootFactory == null) {
|
|
$rootFactory = $this;
|
|
$shift = 0;
|
|
} else {
|
|
$shift = $rootFactory->getEnumerationShift($this);
|
|
}
|
|
|
|
ksort($this->_modifiedObjects);
|
|
|
|
$result = array();
|
|
require_once 'Zend/Pdf/UpdateInfoContainer.php';
|
|
foreach ($this->_modifiedObjects as $objNum => $obj) {
|
|
if ($this->_removedObjects->contains($obj)) {
|
|
$result[$objNum+$shift] = new Zend_Pdf_UpdateInfoContainer($objNum + $shift,
|
|
$obj->getGenNum()+1,
|
|
true);
|
|
} else {
|
|
$result[$objNum+$shift] = new Zend_Pdf_UpdateInfoContainer($objNum + $shift,
|
|
$obj->getGenNum(),
|
|
false,
|
|
$obj->dump($rootFactory));
|
|
}
|
|
}
|
|
|
|
foreach ($this->_attachedFactories as $factory) {
|
|
$result += $factory->listModifiedObjects($rootFactory);
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Register object in the factory
|
|
*
|
|
* It's used to clear "parent object" referencies when factory is closed and clean up resources
|
|
*
|
|
* @param string $refString
|
|
* @param Zend_Pdf_Element_Object $obj
|
|
*/
|
|
public function registerObject(Zend_Pdf_Element_Object $obj, $refString)
|
|
{
|
|
$this->_registeredObjects[$refString] = $obj;
|
|
}
|
|
|
|
/**
|
|
* Fetch object specified by reference
|
|
*
|
|
* @param string $refString
|
|
* @return Zend_Pdf_Element_Object|null
|
|
*/
|
|
public function fetchObject($refString)
|
|
{
|
|
if (!isset($this->_registeredObjects[$refString])) {
|
|
return null;
|
|
}
|
|
return $this->_registeredObjects[$refString];
|
|
}
|
|
|
|
|
|
/**
|
|
* Check if PDF file was modified
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public function isModified()
|
|
{
|
|
if (count($this->_modifiedObjects) != 0) {
|
|
return true;
|
|
}
|
|
|
|
foreach ($this->_attachedFactories as $subFactory) {
|
|
if ($subFactory->isModified()) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|