<?php
require_once('fishnavbase.class.php');
class FishNavItem extends FishNavBase
{
    var $item = NULL;
    var $url = NULL;
    var $link = NULL;
    var $selected_link = NULL;
    var $unselected_link = NULL;
    var $displayed = TRUE;
    var $selected = FALSE;
    var $display_text = NULL;
    var $link_tag_text = NULL;

    function FishNavItem()
    {
        $args = func_get_args();
        $this->constructor($args);
    }

    function selected($newvalue=NULL)
    {
        if ($newvalue !== NULL)
            $this->selected = !empty($newvalue);
        elseif (gettype($this->selected) != 'boolean')
            $this->selected = !empty($this->selected);
        return $this->selected;
    }

    function selected_link()
    {
        if (empty($this->selected_link))
        {
            if (!empty($this->link))
                $this->selected_link = $this->link;
            elseif (!empty($this->unselected_link))
                $this->selected_link = $this->unselected_link;
            else
                $this->selected_link = $this->item;
        }
        return $this->selected_link;
    }

    function unselected_link()
    {
        if (empty($this->unselected_link))
        {
            if (!empty($this->link))
                $this->unselected_link = $this->link;
            elseif (!empty($this->selected_link))
                $this->unselected_link = $this->selected_link;
            else
                $this->unselected_link = $this->item;
        }
        return $this->unselected_link;
    }

    function displayed($newvalue=NULL)
    {
        if ($newvalue !== NULL)
            $this->displayed = !empty($newvalue);
        elseif (gettype($this->displayed) != 'boolean')
            $this->displayed = !empty($this->displayed);
        return $this->displayed;
    }

    function selected_link_tag($url,$link)
    {
        return $this->link_tag($url, $link, 'black');
    }

    function unselected_link_tag($url,$link)
    {
        return $this->link_tag($url, $link, 'red');
    }

    function link_tag($url=NULL,$link=NULL,$color='red')
    {
        if ($this->link_tag_text)
        {
            $cmd = '$link_tag_text = <<<EOT
'.$this->link_tag_text.'
EOT;
';
            eval($cmd);
            $output = $link_tag_text;
        }
        elseif ($url)
        {
            if (!$link)
                $link = basename($url);
            $output = <<<EOT
<a target="_top" href="$url" style="text-decoration:none;color:$color;">$link</a>
EOT;
        }
        elseif ($link)
        {
            $output = $link;
        }
        else
        {
            $output = '';
        }
        return $output;
    }

    function link()
    {
        if ($this->selected())
        {
            $output = $this->selected_link_tag(
                $this->url
                , $this->selected_link()
            );
        }
        else
        {
            $output = $this->unselected_link_tag(
                $this->url
                , $this->unselected_link()
            );
        }
        return $output;
    }

    function format_display()
    {
        $link = $this->link();
        if ($this->display_text)
        {
            $cmd = '$display_text = <<<EOT
'.$this->display_text.'
EOT;
';
            eval($cmd);
            $output = $display_text;
        }
        else
        {
            $output = <<<EOT

  <td nowrap align="left" valign="center"><b>$link</b></td>

EOT;
        }
        return $output;
    }

    function display()
    {
        return $this->displayed() ? $this->format_display() : '';
    }
}
?>