<?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 Actions

 * @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: Action.php 22437 2010-06-15 16:13:46Z alexander $

 */

/** Internally used classes */

require_once 'Zend/Pdf/Element.php';

require_once 'Zend/Pdf/Element/Array.php';

/** Zend_Pdf_Target */

require_once 'Zend/Pdf/Target.php';

/**

 * Abstract PDF action representation class

 *

 * @package    Zend_Pdf

 * @subpackage Actions

 * @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_Action extends Zend_Pdf_Target implements RecursiveIterator, Countable

{

    /**

     * Action dictionary

     *

     * @var Zend_Pdf_Element_Dictionary|Zend_Pdf_Element_Object|Zend_Pdf_Element_Reference

     */

    protected $_actionDictionary;

    /**

     * An original list of chained actions

     *

     * @var array  Array of Zend_Pdf_Action objects

     */

    protected $_originalNextList;

    /**

     * A list of next actions in actions tree (used for actions chaining)

     *

     * @var array  Array of Zend_Pdf_Action objects

     */

    public $next = array();

    /**

     * Object constructor

     *

     * @param Zend_Pdf_Element_Dictionary $dictionary

     * @param SplObjectStorage            $processedActions  list of already processed action dictionaries, used to avoid cyclic references

     * @throws Zend_Pdf_Exception

     */

    public function __construct(Zend_Pdf_Element $dictionary, SplObjectStorage $processedActions)

    {

        require_once 'Zend/Pdf/Element.php';

        if ($dictionary->getType() != Zend_Pdf_Element::TYPE_DICTIONARY) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('$dictionary mast be a direct or an indirect dictionary object.');

        }

        $this->_actionDictionary = $dictionary;

        if ($dictionary->Next !== null) {

            if ($dictionary->Next instanceof Zend_Pdf_Element_Dictionary) {

                // Check if dictionary object is not already processed

                if (!$processedActions->contains($dictionary->Next)) {

                    $processedActions->attach($dictionary->Next);

                    $this->next[] = Zend_Pdf_Action::load($dictionary->Next, $processedActions);

                }

            } else if ($dictionary->Next instanceof Zend_Pdf_Element_Array) {

                foreach ($dictionary->Next->items as $chainedActionDictionary) {

                    // Check if dictionary object is not already processed

                    if (!$processedActions->contains($chainedActionDictionary)) {

                        $processedActions->attach($chainedActionDictionary);

                        $this->next[] = Zend_Pdf_Action::load($chainedActionDictionary, $processedActions);

                    }

                }

            } else {

                require_once 'Zend/Pdf/Exception.php';

                throw new Zend_Pdf_Exception('PDF Action dictionary Next entry must be a dictionary or an array.');

            }

        }

        $this->_originalNextList = $this->next;

    }

    /**

     * Load PDF action object using specified dictionary

     *

     * @internal

     * @param Zend_Pdf_Element $dictionary (It's actually Dictionary or Dictionary Object or Reference to a Dictionary Object)

     * @param SplObjectStorage $processedActions  list of already processed action dictionaries, used to avoid cyclic references

     * @return Zend_Pdf_Action

     * @throws Zend_Pdf_Exception

     */

    public static function load(Zend_Pdf_Element $dictionary, SplObjectStorage $processedActions = null)

    {

        if ($processedActions === null) {

            $processedActions = new SplObjectStorage();

        }

        require_once 'Zend/Pdf/Element.php';

        if ($dictionary->getType() != Zend_Pdf_Element::TYPE_DICTIONARY) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('$dictionary mast be a direct or an indirect dictionary object.');

        }

        if (isset($dictionary->Type)  &&  $dictionary->Type->value != 'Action') {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('Action dictionary Type entry must be set to \'Action\'.');

        }

        if ($dictionary->S === null) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('Action dictionary must contain S entry');

        }

        switch ($dictionary->S->value) {

            case 'GoTo':

                require_once 'Zend/Pdf/Action/GoTo.php';

                return new Zend_Pdf_Action_GoTo($dictionary, $processedActions);

                break;

            case 'GoToR':

                require_once 'Zend/Pdf/Action/GoToR.php';

                return new Zend_Pdf_Action_GoToR($dictionary, $processedActions);

                break;

            case 'GoToE':

                require_once 'Zend/Pdf/Action/GoToE.php';

                return new Zend_Pdf_Action_GoToE($dictionary, $processedActions);

                break;

            case 'Launch':

                require_once 'Zend/Pdf/Action/Launch.php';

                return new Zend_Pdf_Action_Launch($dictionary, $processedActions);

                break;

            case 'Thread':

                require_once 'Zend/Pdf/Action/Thread.php';

                return new Zend_Pdf_Action_Thread($dictionary, $processedActions);

                break;

            case 'URI':

                require_once 'Zend/Pdf/Action/URI.php';

                return new Zend_Pdf_Action_URI($dictionary, $processedActions);

                break;

            case 'Sound':

                require_once 'Zend/Pdf/Action/Sound.php';

                return new Zend_Pdf_Action_Sound($dictionary, $processedActions);

                break;

            case 'Movie':

                require_once 'Zend/Pdf/Action/Movie.php';

                return new Zend_Pdf_Action_Movie($dictionary, $processedActions);

                break;

            case 'Hide':

                require_once 'Zend/Pdf/Action/Hide.php';

                return new Zend_Pdf_Action_Hide($dictionary, $processedActions);

                break;

            case 'Named':

                require_once 'Zend/Pdf/Action/Named.php';

                return new Zend_Pdf_Action_Named($dictionary, $processedActions);

                break;

            case 'SubmitForm':

                require_once 'Zend/Pdf/Action/SubmitForm.php';

                return new Zend_Pdf_Action_SubmitForm($dictionary, $processedActions);

                break;

            case 'ResetForm':

                require_once 'Zend/Pdf/Action/ResetForm.php';

                return new Zend_Pdf_Action_ResetForm($dictionary, $processedActions);

                break;

            case 'ImportData':

                require_once 'Zend/Pdf/Action/ImportData.php';

                return new Zend_Pdf_Action_ImportData($dictionary, $processedActions);

                break;

            case 'JavaScript':

                require_once 'Zend/Pdf/Action/JavaScript.php';

                return new Zend_Pdf_Action_JavaScript($dictionary, $processedActions);

                break;

            case 'SetOCGState':

                require_once 'Zend/Pdf/Action/SetOCGState.php';

                return new Zend_Pdf_Action_SetOCGState($dictionary, $processedActions);

                break;

            case 'Rendition':

                require_once 'Zend/Pdf/Action/Rendition.php';

                return new Zend_Pdf_Action_Rendition($dictionary, $processedActions);

                break;

            case 'Trans':

                require_once 'Zend/Pdf/Action/Trans.php';

                return new Zend_Pdf_Action_Trans($dictionary, $processedActions);

                break;

            case 'GoTo3DView':

                require_once 'Zend/Pdf/Action/GoTo3DView.php';

                return new Zend_Pdf_Action_GoTo3DView($dictionary, $processedActions);

                break;

            default:

                require_once 'Zend/Pdf/Action/Unknown.php';

                return new Zend_Pdf_Action_Unknown($dictionary, $processedActions);

                break;

        }

    }

    /**

     * Get resource

     *

     * @internal

     * @return Zend_Pdf_Element

     */

    public function getResource()

    {

        return $this->_actionDictionary;

    }

    /**

     * Dump Action and its child actions into PDF structures

     *

     * Returns dictionary indirect object or reference

     *

     * @internal

     * @param Zend_Pdf_ElementFactory $factory   Object factory for newly created indirect objects

     * @param SplObjectStorage $processedActions  list of already processed actions (used to prevent infinity loop caused by cyclic references)

     * @return Zend_Pdf_Element_Object|Zend_Pdf_Element_Reference   Dictionary indirect object

     */

    public function dumpAction(Zend_Pdf_ElementFactory_Interface $factory, SplObjectStorage $processedActions = null)

    {

        if ($processedActions === null) {

            $processedActions = new SplObjectStorage();

        }

        if ($processedActions->contains($this)) {

            require_once 'Zend/Pdf/Exception.php';

            throw new Zend_Pdf_Exception('Action chain cyclyc reference is detected.');

        }

        $processedActions->attach($this);

        $childListUpdated = false;

        if (count($this->_originalNextList) != count($this->next)) {

            // If original and current children arrays have different size then children list was updated

            $childListUpdated = true;

        } else if ( !(array_keys($this->_originalNextList) === array_keys($this->next)) ) {

            // If original and current children arrays have different keys (with a glance to an order) then children list was updated

            $childListUpdated = true;

        } else {

            foreach ($this->next as $key => $childAction) {

                if ($this->_originalNextList[$key] !== $childAction) {

                    $childListUpdated = true;

                    break;

                }

            }

        }

        if ($childListUpdated) {

            $this->_actionDictionary->touch();

            switch (count($this->next)) {

                case 0:

                    $this->_actionDictionary->Next = null;

                    break;

                case 1:

                    $child = reset($this->next);

                    $this->_actionDictionary->Next = $child->dumpAction($factory, $processedActions);

                    break;

                default:

                    require_once 'Zend/Pdf/Element/Array.php';

                    $pdfChildArray = new Zend_Pdf_Element_Array();

                    foreach ($this->next as $child) {

                        $pdfChildArray->items[] = $child->dumpAction($factory, $processedActions);

                    }

                    $this->_actionDictionary->Next = $pdfChildArray;

                    break;

            }

        } else {

            foreach ($this->next as $child) {

                $child->dumpAction($factory, $processedActions);

            }

        }

        if ($this->_actionDictionary instanceof Zend_Pdf_Element_Dictionary) {

            // It's a newly created action. Register it within object factory and return indirect object

            return $factory->newObject($this->_actionDictionary);

        } else {

            // It's a loaded object

            return $this->_actionDictionary;

        }

    }

    ////////////////////////////////////////////////////////////////////////

    //  RecursiveIterator interface methods

    //////////////

    /**

     * Returns current child action.

     *

     * @return Zend_Pdf_Action

     */

    public function current()

    {

        return current($this->next);

    }

    /**

     * Returns current iterator key

     *

     * @return integer

     */

    public function key()

    {

        return key($this->next);

    }

    /**

     * Go to next child

     */

    public function next()

    {

        return next($this->next);

    }

    /**

     * Rewind children

     */

    public function rewind()

    {

        return reset($this->next);

    }

    /**

     * Check if current position is valid

     *

     * @return boolean

     */

    public function valid()

    {

        return current($this->next) !== false;

    }

    /**

     * Returns the child action.

     *

     * @return Zend_Pdf_Action|null

     */

    public function getChildren()

    {

        return current($this->next);

    }

    /**

     * Implements RecursiveIterator interface.

     *

     * @return bool  whether container has any pages

     */

    public function hasChildren()

    {

        return count($this->next) > 0;

    }

    ////////////////////////////////////////////////////////////////////////

    //  Countable interface methods

    //////////////

    /**

     * count()

     *

     * @return int

     */

    public function count()

    {

        return count($this->childOutlines);

    }

}