<?php /* vim: set binary expandtab tabstop=4 shiftwidth=4 textwidth=80:
-------------------------------------------------------------------------------
                             Ministerio de Economía
                                    meconlib
-------------------------------------------------------------------------------
This file is part of meconlib.

meconlib is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.

meconlib is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License; if not,
write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA  02111-1307  USA
-------------------------------------------------------------------------------
Creado: Thu Aug 21 15:09:10 2003
Autor:  @@author <@@email>
-------------------------------------------------------------------------------
$Id$
-----------------------------------------------------------------------------*/

require_once 'HTML/Common.php';

/**
 * HTML Link representation.
When adding GET variables, if the value is an object, it looks for a toString() method, if it doesn't exists or if is an array, it serializes the object/array to get a string value.
This is done in toHtml() method. Object are stored as references.
 *
 * @package HTML
 * @access public
 */
class MECON_HTML_Link extends HTML_Common {
    /**
     * Variables to send via GET HTTP method.
     *
     * @var    array $getVars
     * @access protected
     */
    var $_getVars = array();

    /**
     * Link contents.
     *
     * @var    array $contents
     * @access protected
     */
    var $_contents = array();

    /**
     * Gets GetVars.
     *
     * @return array
     * @access public
     */
    function getGetVars()
    {
        return $this->_getVars;
    }

    /**
     * Sets GetVars.
     *
     * @param  array $getVars GetVars.
     *
     * @return void
     * @access public
     */
    function setGetVars($getVars)
    {
        $this->_getVars = $getVars;
    }

    /**
     * Constructor.
     *
     * @param  string $href Hypertext reference.
     * @param  mixed $contents Link contents.
     * @param  array $getVars Array (as key => value pairs) of GET variables to pass to the link.
     * @param  array $attrs Other links (A tag) attributes.
     *
     * @return void
     * @access public
     */
    function MECON_HTML_Link($href = '', $contents = '', $getVars = array(), $attrs = array())
    {
        if (is_array($attrs)) {
            $attrs['href'] = $href;
            if (!isset($attrs['class'])){
                $attrs['class'] = 'mecon_html_link';
            }
        } else {
            $attrs .= " href=$href";
        }
        parent::HTML_Common($attrs);
        $this->_getVars = $getVars;
        $this->addContents($contents);
    }

    /**
     * Converts to HTML output.
     *
     * @return string
     * @access public
     */
    function toHtml() // ~X2C
    {
        $attrs = '';
        foreach ($this->getAttributes() as $key => $val) {
            if ($key == 'href') {
                $vars = array();
                foreach ($this->_getVars as $var => $v) {
                    if (is_object($v) and method_exists($v, 'tostring')) {
                        $v = $v->tostring();
                    } elseif (is_object($v) or is_array($v)) {
                        $v = serialize($v);
                    }
                    $vars[] = urlencode($var) . '=' . urlencode($v);
                }
                if ($vars) {
                    $val .= '?' . join('&', $vars);
                }
            } else {
                $val = htmlentities($val);
            }
            $attrs .= ' ' . $key . '="' . $val . '"';
        }
        return "<A$attrs>" . $this->getContents() . '</A>';
    }

    /**
     * Gets hypertext reference.
     *
     * @return string
     * @access public
     */
    function getHref() // ~X2C
    {
        return $this->getAttribute('href');
    }

    /**
     * Sets hypertext reference.
     *
     * @param  string $href Hypertext reference.
     *
     * @return void
     * @access public
     */
    function setHref($href) // ~X2C
    {
        $this->updateAttributes(array('href' => $href));
    }

    /**
     * Set a GET variable.
     *
     * @param  string $key Key for the GET variable.
     * @param  mixed $value Value for the variable.
     *
     * @return void
     * @access public
     */
    function setGetVar($key, $value) // ~X2C
    {
        $this->_getVars[$key] = $value;
    }

    /**
     * Updates GET variables.
     *
     * @param  array $vars Array (as key => value pairs) of GET variables to update.
If they doesn't exists, they are added, if they exists, they are updated.
     *
     * @return void
     * @access public
     */
    function updateGetVars($vars) // ~X2C
    {
        $this->_getVars += $vars;
    }

    /**
     * Unsets (removes) GET variables. This method supports variable arguments.
     *
     * @param  string $key Key of the GET variable to remove.
     *
     * @return void
     * @access public
     */
    function unsetGetVars($key) // ~X2C
    {
        $keys = func_get_args();
        foreach ($keys as $key) {
            unset($this->_getVars[$key]);
        }
    }

    /**
     * Adds contents to the link.
     *
     * @param  mixed &$contents Contents to add. Can be an object with a toHtml() method.
     *
     * @return void
     * @access public
     */
    function addContents($contents) // ~X2C
    {
        $this->_contents[] = $contents;
    }

    /**
     * @return string
     * @access public
     */
    function getContents() // ~X2C
    {
        $html = '';
        foreach ($this->_contents as $c) {
            if (is_object($c) and method_exists($c, 'tohtml')) {
                $html .= $c->toHtml();
            } else {
                $html .= htmlentities($c);
            }
        }
        return $html;
    }

    /**
     * @param  mixed $contents New link contents.
     *
     * @return void
     * @access public
     */
    function setContents($contents) // ~X2C
    {
        $this->_contents = array($contents);
    }

    /**
     * @param  mixed $contents New link contents.
     *
     * @return void
     * @access public
     */
    function getCSS()
    {
        return '/MECON/css/html/link';
    }

}

?>