element.php

Bug tracker, and reporter.

<?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 [e-mail] so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Form
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */

/** Zend_Filter */
require_once 'Zend/Filter.php';

/** Zend_Validate_Interface */
require_once 'Zend/Validate/Interface.php';

/**
 * Zend_Form_Element 
 * 
 * @category   Zend
 * @package    Zend_Form
 * @subpackage Element
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Element.php 8984 2008-03-21 21:16:25Z matthew $
 */
class Zend_Form_Element implements Zend_Validate_Interface
{
    /**
     * Element Constants
     */
    const DECORATOR = 'DECORATOR';
    const FILTER    = 'FILTER';
    const VALIDATE  = 'VALIDATE';

    /**
     * Default view helper to use
     * @var string
     */
    public $helper = 'formText';

    /**
     * 'Allow empty' flag
     * @var bool
     */
    protected $_allowEmpty = true;

    /**
     * Flag indicating whether or not to insert NotEmpty validator when element is required
     * @var bool
     */
    protected $_autoInsertNotEmptyValidator = true;

    /**
     * Array to which element belongs
     * @var string
     */
    protected $_belongsTo;

    /**
     * Element decorators 
     * @var array
     */
    protected $_decorators = array();

    /**
     * Element description
     * @var string
     */
    protected $_description;

    /**
     * Should we disable loading the default decorators?
     * @var bool
     */
    protected $_disableLoadDefaultDecorators = false;

    /**
     * Validation errors
     * @var array
     */
    protected $_errors = array();

    /**
     * Element filters
     * @var array
     */
    protected $_filters = array();

    /**
     * Ignore flag (used when retrieving values at form level)
     * @var bool
     */
    protected $_ignore = false;

    /**
     * Does the element represent an array?
     * @var bool
     */
    protected $_isArray = false;

    /**
     * Element label
     * @var string
     */
    protected $_label;

    /**
     * Plugin loaders for filter and validator chains
     * @var array
     */
    protected $_loaders = array();

    /**
     * Formatted validation error messages
     * @var array
     */
    protected $_messages = array();

    /**
     * Element name
     * @var string
     */
    protected $_name;

    /**
     * Order of element
     * @var int
     */
    protected $_order;

    /**
     * Required flag
     * @var bool
     */
    protected $_required = false;

    /**
     * @var Zend_Translate
     */
    protected $_translator;

    /**
     * Is translation disabled?
     * @var bool
     */
    protected $_translatorDisabled = false;

    /**
     * Element type
     * @var string
     */
    protected $_type;

    /**
     * Array of initialized validators
     * @var array Validators
     */
    protected $_validators = array();

    /**
     * Array of un-initialized validators
     * @var array
     */
    protected $_validatorRules = array();

    /**
     * Element value
     * @var mixed
     */
    protected $_value;

    /**
     * @var Zend_View_Interface
     */
    protected $_view;

    /**
     * Constructor
     *
     * $spec may be:
     * - string: name of element
     * - array: options with which to configure element
     * - Zend_Config: Zend_Config with options for configuring element
     * 
     * @param  string|array|Zend_Config $spec 
     * @return void
     * @throws Zend_Form_Exception if no element name after initialization
     */
    public function __construct($spec, $options = null)
    {
        if (is_string($spec)) {
            $this->setName($spec);
        } elseif (is_array($spec)) {
            $this->setOptions($spec);
        } elseif ($spec instanceof Zend_Config) {
            $this->setConfig($spec);
        } 
        
        if (is_string($spec) && is_array($options)) {
            $this->setOptions($options);
        } elseif (is_string($spec) && ($options instanceof Zend_Config)) {
            $this->setConfig($options);
        }

        if (null === $this->getName()) {
            require_once 'Zend/Form/Exception.php';
            throw new Zend_Form_Exception('Zend_Form_Element requires each element to have a name');
        }

        /**
         * Extensions
         */
        $this->init();

        /**
         * Register ViewHelper decorator by default
         */
        $this->loadDefaultDecorators();
    }

    /**
     * Initialize object; used by extending classes
     * 
     * @return void
     */
    public function init()
    {
    }

    /**
     * Set flag to disable loading default decorators
     * 
     * @param  bool $flag 
     * @return Zend_Form_Element
     */
    public function setDisableLoadDefaultDecorators($flag)
    {
        $this->_disableLoadDefaultDecorators = (bool) $flag;
        return $this;
    }

    /**
     * Should we load the default decorators?
     * 
     * @return bool
     */
    public function loadDefaultDecoratorsIsDisabled()
    {
        return $this->_disableLoadDefaultDecorators;
    }

    /**
     * Load default decorators
     * 
     * @return void
     */
    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return;
        }

        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('ViewHelper')
                ->addDecorator('Errors')
                ->addDecorator('HtmlTag', array('tag' => 'dd'))
                ->addDecorator('Label', array('tag' => 'dt'));
        }
    }

    /**
     * Set object state from options array
     * 
     * @param  array $options 
     * @return Zend_Form_Element
     */
    public function setOptions(array $options)
    {
        if (isset($options['prefixPath'])) {
            $this->addPrefixPaths($options['prefixPath']);
            unset($options['prefixPath']);
        }

        foreach ($options as $key => $value) {
            if (in_array($key, array('options', 'config'))) {
                continue;
            }

            $method = 'set' . ucfirst($key);

            if (in_array($method, array('setTranslator', 'setPluginLoader', 'setView'))) {
                if (!is_object($value)) {
                    continue;
                }
            }

            if (method_exists($this, $method)) {
                // Setter exists; use it
                $this->$method($value);
            } else {
                // Assume it's metadata
                $this->setAttrib($key, $value);
            }
        }
        return $this;
    }

    /**
     * Set object state from Zend_Config object
     * 
     * @param  Zend_Config $config 
     * @return Zend_Form_Element
     */
    public function setConfig(Zend_Config $config)
    {
        return $this->setOptions($config->toArray());
    }


    // Localization:

    /**
     * Set translator object for localization
     * 
     * @param  Zend_Translate|null $translator 
     * @return Zend_Form_Element
     */
    public function setTranslator($translator = null)
    {
        if (null === $translator) {
            $this->_translator = null;
        } elseif ($translator instanceof Zend_Translate_Adapter) {
            $this->_translator = $translator;
        } elseif ($translator instanceof Zend_Translate) {
            $this->_translator = $translator->getAdapter();
        } else {
            require_once 'Zend/Form/Exception.php';
            throw new Zend_Form_Exception('Invalid translator specified');
        }
        return $this;
    }

    /**
     * Retrieve localization translator object
     * 
     * @return Zend_Translate_Adapter|null
     */
    public function getTranslator()
    {
        if ($this->translatorIsDisabled()) {
            return null;
        }

        if (null === $this->_translator) {
            require_once 'Zend/Form.php';
            return Zend_Form::getDefaultTranslator();
        }
        return $this->_translator;
    }

    /**
     * Indicate whether or not translation should be disabled
     * 
     * @param  bool $flag 
     * @return Zend_Form_Element
     */
    public function setDisableTranslator($flag)
    {
        $this->_translatorDisabled = (bool) $flag;
        return $this;
    }

    /**
     * Is translation disabled?
     * 
     * @return bool
     */
    public function translatorIsDisabled()
    {
        return $this->_translatorDisabled;
    }

    // Metadata

    /**
     * Filter a name to only allow valid variable characters
     * 
     * @param  string $value 
     * @param  bool $allowBrackets
     * @return string
     */
    public function filterName($value, $allowBrackets = false)
    {
        $charset = '^a-zA-Z0-9_\x7f-\xff';
        if ($allowBrackets) {
            $charset .= '\[\]';
        }
        return preg_replace('/[' . $charset . ']/', '', (string) $value);
    }

    /**
     * Set element name
     * 
     * @param  string $name 
     * @return Zend_Form_Element
     */
    public function setName($name)
    {
        $name = $this->filtername($name);
        if (('0' !== $name) && empty($name)) {
            require_once 'Zend/Form/Exception.php';
            throw new Zend_Form_Exception('Invalid name provided; must contain only valid variable characters and be non-empty');
        }

        $this->_name = $name;
        return $this;
    }

    /**
     * Return element name
     * 
     * @return string
     */
    public function getName()
    {
        return $this->_name;
    }

    /**
     * Set element value
     * 
     * @param  mixed $value 
     * @return Zend_Form_Element
     */
    public function setValue($value)
    {
        $this->_value = $value;
        return $this;
    }

    /**
     * Filter a value
     * 
     * @param  string $value 
     * @param  string $key 
     * @return void
     */
    protected function _filterValue(&$value, &$key)
    {
        foreach ($this->_filters as $filter) {
            $value = $filter->filter($value);
        }
    }

    /**
     * Retrieve filtered element value
     * 
     * @return mixed
     */
    public function getValue()
    {
        $valueFiltered = $this->_value;

        if (is_array($valueFiltered)) {
            array_walk_recursive($valueFiltered, array($this, '_filterValue'));
        } else {
            $this->_filterValue($valueFiltered, $valueFiltered);
        }

        return $valueFiltered;
    }

    /**
     * Retrieve unfiltered element value
     * 
     * @return mixed
     */
    public function getUnfilteredValue()
    {
        return $this->_value;
    }

    /**
     * Set element label
     * 
     * @param  string $label 
     * @return Zend_Form_Element
     */
    public function setLabel($label)
    {
        $this->_label = (string) $label;
        return $this;
    }

    /**
     * Retrieve element label
     * 
     * @return string
     */
    public function getLabel()
    {
        return $this->_label;
    }

    /**
     * Set element order
     * 
     * @param  int $order 
     * @return Zend_Form_Element
     */
    public function setOrder($order)
    {
        $this->_order = (int) $order;
        return $this;
    }

    /**
     * Retrieve element order
     * 
     * @return int
     */
    public function getOrder()
    {
        return $this->_order;
    }

    /**
     * Set required flag
     * 
     * @param  bool $flag 
     * @return Zend_Form_Element
     */
    public function setRequired($flag)
    {