gistfile1.php

<?php

/**
 * Layout management library based on:
 * http://codeigniter.com/wiki/layout_library/
 *
 * Extended layout placeholders and javascript and css files inclussion.
 * Author: gbrunacci <gbrunacci *at siamsoft *dot com *dot ar>
 */
class Layout {
    var $obj;
    var $layout;
    var $js;
    var $css;
    var $placeholder;
    var $content_var = 'content';
    var $app_layout_path = 'layouts/';
    

    function Layout($layout = "default")
    {
        $this->obj =& get_instance();
        $this->layout = $layout;
        $this->js = $this->css = $this->placeholder = array();
    }

    function setLayout($layout)
    {
      $this->layout = $layout;
    }

    function view($view, $data=null, $return=false)
    {
        $loadedData = array();
        $loadedData['content'] = $this->obj->load->view($view,$data,true);

        if($return)
        {
            $this->obj->load->_ci_view_path = APPPATH . $this->app_layout_path;
            $output = $this->obj->load->view($this->layout, $loadedData, true);
            $this->obj->load->_ci_view_path = $this->placeholder;
            return $output;
        }
        else
        {
            $this->obj->load->_ci_view_path = APPPATH . $this->app_layout_path;
            $this->obj->load->view($this->layout, $loadedData, false);
            $this->obj->load->_ci_view_path = $this->placeholder;
        }
    }

    function render($html)
    {
        $this->obj->load->_ci_view_path = APPPATH . $this->app_layout_path;
        $loadedData["content"] = $html;
        $this->obj->load->view($this->layout,$loadedData);
        $this->obj->load->_ci_view_path = $this->placeholder;
    }

    function load_js($file=null)
    {
        if(is_array($file)){
            foreach($file as $f)
                $this->js[] = $f;
        }else $this->js[] = $file;
    }

    function js()
    {
        $stream = "";
        foreach($this->js as $js){
            $stream .= '<script type="text/javascript" src="/js/'. $js .'.js" ></script>' . "\n";
        }

        
        return $stream;
    }

    function load_css($file=null)
    {
        if(is_array($file)){
            foreach($file as $f)
                $this->css[] = $f;
        }else $this->css[] = $file;
    }

    function css()
    {
        $stream = "";
        foreach($this->css as $css){
            $stream .= '<link href="/css/'. $css .'.css" rel="stylesheet" type="text/css" media="screen" />' . "\n";
        }

        return $stream;
    }

    function placeholder($key, $value=null){
        if($value==null){
            if(isset($this->placeholder[$key])){
              return $this->placeholder[$key];
            } else {
              return "<!-- missing placeholder:" . $key . " -->";
            }
        } else {
          $this->placeholder[$key] = $value;
        }
    }
} 

// rendering without a view but with the layout.

$this->layout->render("hello");