<?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_View

 * @subpackage Helper

 * @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: HtmlElement.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_View_Helper_Abstract

 */

require_once 'Zend/View/Helper/Abstract.php';

/**

 * @category   Zend

 * @package    Zend_View

 * @subpackage Helper

 * @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_View_Helper_HtmlElement extends Zend_View_Helper_Abstract

{

    /**

     * EOL character

     */

    const EOL = "\n";

    /**

     * The tag closing bracket

     *

     * @var string

     */

    protected $_closingBracket = null;

    /**

     * Get the tag closing bracket

     *

     * @return string

     */

    public function getClosingBracket()

    {

        if (!$this->_closingBracket) {

            if ($this->_isXhtml()) {

                $this->_closingBracket = ' />';

            } else {

                $this->_closingBracket = '>';

            }

        }

        return $this->_closingBracket;

    }

    /**

     * Is doctype XHTML?

     *

     * @return boolean

     */

    protected function _isXhtml()

    {

        $doctype = $this->view->doctype();

        return $doctype->isXhtml();

    }

    /**

     * Converts an associative array to a string of tag attributes.

     *

     * @access public

     *

     * @param array $attribs From this array, each key-value pair is

     * converted to an attribute name and value.

     *

     * @return string The XHTML for the attributes.

     */

    protected function _htmlAttribs($attribs)

    {

        $xhtml = '';

        foreach ((array) $attribs as $key => $val) {

            $key = $this->view->escape($key);

            if (('on' == substr($key, 0, 2)) || ('constraints' == $key)) {

                // Don't escape event attributes; _do_ substitute double quotes with singles

                if (!is_scalar($val)) {

                    // non-scalar data should be cast to JSON first

                    require_once 'Zend/Json.php';

                    $val = Zend_Json::encode($val);

                }

                $val = preg_replace('/"([^"]*)":/', '$1:', $val);

            } else {

                if (is_array($val)) {

                    $val = implode(' ', $val);

                }

                $val = $this->view->escape($val);

            }

            if ('id' == $key) {

                $val = $this->_normalizeId($val);

            }

            if (strpos($val, '"') !== false) {

                $xhtml .= " $key='$val'";

            } else {

                $xhtml .= " $key=\"$val\"";

            }

        }

        return $xhtml;

    }

    /**

     * Normalize an ID

     *

     * @param  string $value

     * @return string

     */

    protected function _normalizeId($value)

    {

        if (strstr($value, '[')) {

            if ('[]' == substr($value, -2)) {

                $value = substr($value, 0, strlen($value) - 2);

            }

            $value = trim($value, ']');

            $value = str_replace('][', '-', $value);

            $value = str_replace('[', '-', $value);

        }

        return $value;

    }

}