ThinkPHP/Library/Vendor/Smarty/sysplugins/smarty_internal_resource_extends.php

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<?php
/**
* Smarty Internal Plugin Resource Extends
*
* @package Smarty
* @subpackage TemplateResources
* @author Uwe Tews
* @author Rodney Rehm
*/

/**
* Smarty Internal Plugin Resource Extends
*
* Implements the file system as resource for Smarty which {extend}s a chain of template files templates
*
* @package Smarty
* @subpackage TemplateResources
*/
class Smarty_Internal_Resource_Extends extends Smarty_Resource {

    /**
    * populate Source Object with meta data from Resource
    *
    * @param Smarty_Template_Source   $source    source object
    * @param Smarty_Internal_Template $_template template object
    */
    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template=null)
    {
        $uid = '';
        $sources = array();
        $components = explode('|', $source->name);
        $exists = true;
        foreach ($components as $component) {
            $s = Smarty_Resource::source(null, $source->smarty, $component);
            if ($s->type == 'php') {
                throw new SmartyException("Resource type {$s->type} cannot be used with the extends resource type");
            }
            $sources[$s->uid] = $s;
            $uid .= $s->filepath;
            if ($_template && $_template->smarty->compile_check) {
                $exists == $exists && $s->exists;
            }
        }
        $source->components = $sources;
        $source->filepath = $s->filepath;
        $source->uid = sha1($uid);
        if ($_template && $_template->smarty->compile_check) {
            $source->timestamp = $s->timestamp;
            $source->exists = $exists;
        }
        // need the template at getContent()
        $source->template = $_template;
    }

    /**
    * populate Source Object with timestamp and exists from Resource
    *
    * @param Smarty_Template_Source $source source object
    */
    public function populateTimestamp(Smarty_Template_Source $source)