root/trunk/patForms/Renderer/PhpTal.php

<?php
/**
 * patForms Renderer for PHPTal
 *
 * $Id$
 *
 * @package       patForms
 * @subpackage    Renderer
 */

/**
 * Error: PHPTal is not available
 */
define('PATFORMS_RENDERER_PHPTAL_ERROR_NO_CLASS', 'Renderer:PhpTal:001');


/**
 * patForms Renderer for PHPTal
 *
 * This requires PHPTal to work. See http://phptal.motion-twin.com/
 *
 * @package       patForms
 * @subpackage    Renderer
 * @author        Sven Fuchs <svenfuchs@artweb-design.de>
 * @license       LGPL, see license.txt for details
 * @link          http://www.php-tools.net
 */
class patForms_Renderer_PhpTal extends patForms_Renderer
{
   /**
    * Stores forms data
    *
    * @access    private
    * @var       array
    */
    var $forms = array();

   /**
    * Stores the template object
    *
    * @access    private
    * @var       object PHPTal
    */
    var $_tmpl = null;

   /**
    * Stores the name of the element attributes that will
    * be replaced in the template.
    *
    * @access    private
    * @var       array
    */
    var $_attributes = array(
        'label',
        'title',
        'display',
    );

   /**
    * Sets the PHPTal object, that will be used to render the page.
    *
    * @access    public
    * @param    object PHPTal
    */
    function setTemplate(&$tmpl)
    {
        $this->_tmpl = &$tmpl;
    }

   /**
    * Sets a list of attributes to replace in the template
    * in addition of the default attributes list.
    *
    * @access   public
    * @param    array   The list of attributes
    * @see      $_attributes
    */
    function setAttributes($attributes)
    {
        $this->_attributes = array_merge( $this->_attributes, $attributes );
    }

   /**
    * Serializes the form elements and sets them to a PHPTal
    * object.
    *
    * Arguments that can be passed:
    * - template = an instance of PHPTal
    * - tmplFile = name of the template file
    * - tmplDir  = directory in which templates are stored
    *
    * @access   public
    * @param    object  Reference to the patForms object
    * @param    array   optional arguments for the renderer
    * @return   object     PHPTal
    */
    function &render(&$patForms, $args = array())
    {
        if (is_object($args)) {
            $args = array('template' => $args);
        }

        // set the template
        if (isset($args['template'])) {
            $this->_tmpl = $args['template'];
        }

        // create a new template instance
        if ($this->_tmpl === null) {
            if (!class_exists('PHPTAL')) {
                return patErrorManager::raiseError(PATFORMS_RENDERER_PHPTAL_ERROR_NO_CLASS, 'No instance of PHPTal has been passed, nor has the class been loaded.');
            }
            $this->_tmpl = new PHPTal();
        }

        // set the base directory
        if (isset($args['tmplDir'])) {
            $this->_tmpl->setTemplateRepository($args['tmplDir']);
        }

        // load the template
        if (isset($args['tmplFile'])) {
            $result = $this->_tmpl->setTemplate($args['tmplFile']);
        }

        // render start and end tags
        $data = array(
            'start' => $patForms->serializeStart(),
            'end' => $patForms->serializeEnd(),
            'elements' => array()
        );

        // render the elements
        foreach ($patForms->getElements() as $element) {

            $ptr = &$data['elements'][$element->getName()];
            $ptr['tag'] = $element->serialize();

            foreach ($this->_attributes as $name) {
                $ptr[$name] = (string) $element->getAttribute($name);
            }
        }

        // render errors if present
        if ($validationErrors = $patForms->getValidationErrors()) {
            foreach($validationErrors as $name => $errors) {
                if (empty($errors)) {
                    continue;
                }

                foreach($errors as $error) {
                    $data['errors'][$name] = $error;
                    $data['errors'][$name]['field'] = $name;
                    $data['errors'][$name]['isFormError'] = ($name == '__form');
                }
            }
        }

        $this->forms[$patForms->getName()] = $data;
        $this->_tmpl->set('forms', $this->forms);

        return $this->_tmpl;
    }
}
?>