shiziyu18/ThinkPHP/Library/Vendor/Smarty/Smarty.class.php

<?php
/**
* Project:     Smarty: the PHP compiling template engine
* File:        Smarty.class.php
* SVN:         $Id: Smarty.class.php 2504 2011-12-28 07:35:29Z liu21st $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*
* For questions, help, comments, discussion, etc., please join the
* Smarty mailing list. Send a blank e-mail to
* smarty-discussion-subscribe@googlegroups.com
*
* @link http://www.smarty.net/
* @copyright 2008 New Digital Group, Inc.
* @author Monte Ohrt <monte at ohrt dot com>
* @author Uwe Tews
* @author Rodney Rehm
* @package Smarty
* @version 3.1.6
*/

/**
* define shorthand directory separator constant
*/
if (!defined('DS')) {
    define('DS', DIRECTORY_SEPARATOR);
}

/**
* set SMARTY_DIR to absolute path to Smarty library files.
* Sets SMARTY_DIR only if user application has not already defined it.
*/
if (!defined('SMARTY_DIR')) {
    define('SMARTY_DIR', dirname(__FILE__) . DS);
}

/**
* set SMARTY_SYSPLUGINS_DIR to absolute path to Smarty internal plugins.
* Sets SMARTY_SYSPLUGINS_DIR only if user application has not already defined it.
*/
if (!defined('SMARTY_SYSPLUGINS_DIR')) {
    define('SMARTY_SYSPLUGINS_DIR', SMARTY_DIR . 'sysplugins' . DS);
}
if (!defined('SMARTY_PLUGINS_DIR')) {
    define('SMARTY_PLUGINS_DIR', SMARTY_DIR . 'plugins' . DS);
}
if (!defined('SMARTY_MBSTRING')) {
    define('SMARTY_MBSTRING', function_exists('mb_strlen'));
}
if (!defined('SMARTY_RESOURCE_CHAR_SET')) {
    // UTF-8 can only be done properly when mbstring is available!
    define('SMARTY_RESOURCE_CHAR_SET', SMARTY_MBSTRING ? 'UTF-8' : 'ISO-8859-1');
}
if (!defined('SMARTY_RESOURCE_DATE_FORMAT')) {
    define('SMARTY_RESOURCE_DATE_FORMAT', '%b %e, %Y');
}

/**
* register the class autoloader
*/
if (!defined('SMARTY_SPL_AUTOLOAD')) {
    define('SMARTY_SPL_AUTOLOAD', 0);
}

if (SMARTY_SPL_AUTOLOAD && set_include_path(get_include_path() . PATH_SEPARATOR . SMARTY_SYSPLUGINS_DIR) !== false) {
    $registeredAutoLoadFunctions = spl_autoload_functions();
    if (!isset($registeredAutoLoadFunctions['spl_autoload'])) {
        spl_autoload_register();
    }
} else {
    spl_autoload_register('smartyAutoload');
}

/**
* Load always needed external class files
*/
include_once SMARTY_SYSPLUGINS_DIR.'smarty_internal_data.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_internal_templatebase.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_internal_template.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_resource.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_internal_resource_file.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_cacheresource.php';
include_once SMARTY_SYSPLUGINS_DIR.'smarty_internal_cacheresource_file.php';

/**
* This is the main Smarty class
* @package Smarty
*/
class Smarty extends Smarty_Internal_TemplateBase {

    /**#@+
    * constant definitions
    */

    /**
    * smarty version
    */
    const SMARTY_VERSION = 'Smarty-3.1.6';

    /**
    * define variable scopes
    */
    const SCOPE_LOCAL = 0;
    const SCOPE_PARENT = 1;
    const SCOPE_ROOT = 2;
    const SCOPE_GLOBAL = 3;
    /**
    * define caching modes
    */
    const CACHING_OFF = 0;
    const CACHING_LIFETIME_CURRENT = 1;
    const CACHING_LIFETIME_SAVED = 2;
    /**
    * define compile check modes
    */
    const COMPILECHECK_OFF = 0;
    const COMPILECHECK_ON = 1;
    const COMPILECHECK_CACHEMISS = 2;
    /**
    * modes for handling of "<?php ... ?>" tags in templates.
    */
    const PHP_PASSTHRU = 0; //-> print tags as plain text
    const PHP_QUOTE = 1; //-> escape tags as entities
    const PHP_REMOVE = 2; //-> escape tags as entities
    const PHP_ALLOW = 3; //-> escape tags as entities
    /**
    * filter types
    */
    const FILTER_POST = 'post';
    const FILTER_PRE = 'pre';
    const FILTER_OUTPUT = 'output';
    const FILTER_VARIABLE = 'variable';
    /**
    * plugin types
    */
    const PLUGIN_FUNCTION = 'function';
    const PLUGIN_BLOCK = 'block';
    const PLUGIN_COMPILER = 'compiler';
    const PLUGIN_MODIFIER = 'modifier';
    const PLUGIN_MODIFIERCOMPILER = 'modifiercompiler';

    /**#@-*/

    /**
    * assigned global tpl vars
    */
    public static $global_tpl_vars = array();

    /**
     * error handler returned by set_error_hanlder() in Smarty::muteExpectedErrors()
     */
    public static $_previous_error_handler = null;
    /**
     * contains directories outside of SMARTY_DIR that are to be muted by muteExpectedErrors()
     */
    public static $_muted_directories = array();

    /**#@+
    * variables
    */

    /**
    * auto literal on delimiters with whitspace
    * @var boolean
    */
    public $auto_literal = true;
    /**
    * display error on not assigned variables
    * @var boolean
    */
    public $error_unassigned = false;
    /**
    * look up relative filepaths in include_path
    * @var boolean
    */
    public $use_include_path = false;
    /**
    * template directory
    * @var array
    */
    private $template_dir = array();
    /**
    * joined template directory string used in cache keys
    * @var string
    */
    public $joined_template_dir = null;
    /**
    * joined config directory string used in cache keys
    * @var string
    */
    public $joined_config_dir = null;
    /**
    * default template handler
    * @var callable
    */
    public $default_template_handler_func = null;
    /**
    * default config handler
    * @var callable
    */
    public $default_config_handler_func = null;
    /**
    * default plugin handler
    * @var callable
    */
    public $default_plugin_handler_func = null;
    /**
    * compile directory
    * @var string
    */
    private $compile_dir = null;
    /**
    * plugins directory
    * @var array
    */
    private $plugins_dir = array();
    /**
    * cache directory
    * @var string
    */
    private $cache_dir = null;
    /**
    * config directory
    * @var array
    */
    private $config_dir = array();
    /**
    * force template compiling?
    * @var boolean
    */
    public $force_compile = false;
    /**
    * check template for modifications?
    * @var boolean
    */
    public $compile_check = true;
    /**
    * use sub dirs for compiled/cached files?
    * @var boolean
    */
    public $use_sub_dirs = false;
    /**
     * allow ambiguous resources (that are made unique by the resource handler)
     * @var boolean
     */
    public $allow_ambiguous_resources = false;
    /**
    * caching enabled
    * @var boolean
    */
    public $caching = false;
    /**
    * merge compiled includes
    * @var boolean
    */
    public $merge_compiled_includes = false;
    /**
    * cache lifetime in seconds
    * @var integer
    */
    public $cache_lifetime = 3600;
    /**
    * force cache file creation
    * @var boolean
    */
    public $force_cache = false;
    /**
     * Set this if you want different sets of cache files for the same
     * templates.
     *
     * @var string
     */
    public $cache_id = null;
    /**
     * Set this if you want different sets of compiled files for the same
     * templates.
     *
     * @var string
     */
    public $compile_id = null;
    /**
    * template left-delimiter
    * @var string
    */
    public $left_delimiter = "{";
    /**
    * template right-delimiter
    * @var string
    */
    public $right_delimiter = "}";
    /**#@+
    * security
    */
    /**
    * class name
    *
    * This should be instance of Smarty_Security.
    *
    * @var string
    * @see Smarty_Security
    */
    public $security_class = 'Smarty_Security';
    /**
    * implementation of security class
    *
    * @var Smarty_Security
    */
    public $security_policy = null;
    /**
    * controls handling of PHP-blocks
    *
    * @var integer
    */
    public $php_handling = self::PHP_PASSTHRU;
    /**
    * controls if the php template file resource is allowed
    *
    * @var bool
    */
    public $allow_php_templates = false;
    /**
    * Should compiled-templates be prevented from being called directly?
    *
    * {@internal
    * Currently used by Smarty_Internal_Template only.
    * }}
    *
    * @var boolean
    */
    public $direct_access_security = true;
    /**#@-*/
    /**
    * debug mode
    *
    * Setting this to true enables the debug-console.
    *
    * @var boolean
    */
    public $debugging = false;
    /**
     * This determines if debugging is enable-able from the browser.
     * <ul>
     *  <li>NONE => no debugging control allowed</li>
     *  <li>URL => enable debugging when SMARTY_DEBUG is found in the URL.</li>
     * </ul>
    * @var string
    */
    public $debugging_ctrl = 'NONE';
    /**
    * Name of debugging URL-param.
    *
    * Only used when $debugging_ctrl is set to 'URL'.
    * The name of the URL-parameter that activates debugging.
    *
    * @var type
    */
    public $smarty_debug_id = 'SMARTY_DEBUG';
    /**
    * Path of debug template.
    * @var string
    */
    public $debug_tpl = null;
    /**
    * When set, smarty uses this value as error_reporting-level.
    * @var int
    */
    public $error_reporting = null;
    /**
    * Internal flag for getTags()
    * @var boolean
    */
    public $get_used_tags = false;

    /**#@+
    * config var settings
    */

    /**
    * Controls whether variables with the same name overwrite each other.
    * @var boolean
    */
    public $config_overwrite = true;
    /**
    * Controls whether config values of on/true/yes and off/false/no get converted to boolean.
    * @var boolean
    */
    public $config_booleanize = true;
    /**
    * Controls whether hidden config sections/vars are read from the file.
    * @var boolean
    */
    public $config_read_hidden = false;

    /**#@-*/

    /**#@+
    * resource locking
    */

    /**
    * locking concurrent compiles
    * @var boolean
    */
    public $compile_locking = true;
    /**
     * Controls whether cache resources should emply locking mechanism
     * @var boolean
     */
    public $cache_locking = false;
    /**
     * seconds to wait for acquiring a lock before ignoring the write lock
     * @var float
     */
    public $locking_timeout = 10;

    /**#@-*/

    /**
    * global template functions
    * @var array
    */
    public $template_functions = array();
    /**
    * resource type used if none given
    *
    * Must be an valid key of $registered_resources.
    * @var string
    */
    public $default_resource_type = 'file';
    /**
    * caching type
    *
    * Must be an element of $cache_resource_types.
    *
    * @var string
    */
    public $caching_type = 'file';
    /**
    * internal config properties
    * @var array
    */
    public $properties = array();
    /**
    * config type
    * @var string
    */
    public $default_config_type = 'file';
    /**
    * cached template objects
    * @var array
    */
    public $template_objects = array();
    /**
    * check If-Modified-Since headers
    * @var boolean
    */
    public $cache_modified_check = false;
    /**
    * registered plugins
    * @var array
    */
    public $registered_plugins = array();
    /**
    * plugin search order
    * @var array
    */
    public $plugin_search_order = array('function', 'block', 'compiler', 'class');
    /**
    * registered objects
    * @var array
    */
    public $registered_objects = array();
    /**
    * registered classes
    * @var array
    */
    public $registered_classes = array();
    /**
    * registered filters
    * @var array
    */
    public $registered_filters = array();
    /**
    * registered resources
    * @var array
    */
    public $registered_resources = array();
    /**
    * resource handler cache
    * @var array
    */
    public $_resource_handlers = array();
    /**
    * registered cache resources
    * @var array
    */
    public $registered_cache_resources = array();
    /**
    * cache resource handler cache
    * @var array
    */
    public $_cacheresource_handlers = array();
    /**
    * autoload filter
    * @var array
    */
    public $autoload_filters = array();
    /**
    * default modifier
    * @var array
    */
    public $default_modifiers = array();
    /**
    * autoescape variable output
    * @var boolean
    */
    public $escape_html = false;
    /**
    * global internal smarty vars
    * @var array
    */
    public static $_smarty_vars = array();
    /**
    * start time for execution time calculation
    * @var int
    */
    public $start_time = 0;
    /**
    * default file permissions
    * @var int
    */
    public $_file_perms = 0644;
    /**
    * default dir permissions
    * @var int
    */
    public $_dir_perms = 0771;
    /**
    * block tag hierarchy
    * @var array
    */
    public $_tag_stack = array();
    /**
    * self pointer to Smarty object
    * @var Smarty
    */
    public $smarty;
    /**
    * required by the compiler for BC
    * @var string
    */
    public $_current_file = null;
    /**
    * internal flag to enable parser debugging
    * @var bool
    */
    public $_parserdebug = false;
    /**
    * Saved parameter of merged templates during compilation
    *
    * @var array
    */
    public $merged_templates_func = array();
    /**#@-*/

    /**
    * Initialize new Smarty object
    *
    */
    public function __construct()
    {
        // selfpointer needed by some other class methods
        $this->smarty = $this;
        if (is_callable('mb_internal_encoding')) {
            mb_internal_encoding(SMARTY_RESOURCE_CHAR_SET);
        }
        $this->start_time = microtime(true);
        // set default dirs
        $this->setTemplateDir('.' . DS . 'templates' . DS)
            ->setCompileDir('.' . DS . 'templates_c' . DS)
            ->setPluginsDir(SMARTY_PLUGINS_DIR)
            ->setCacheDir('.' . DS . 'cache' . DS)
            ->setConfigDir('.' . DS . 'configs' . DS);

        $this->debug_tpl = 'file:' . dirname(__FILE__) . '/debug.tpl';
        if (isset($_SERVER['SCRIPT_NAME'])) {
            $this->assignGlobal('SCRIPT_NAME', $_SERVER['SCRIPT_NAME']);
        }
    }


    /**
    * Class destructor
    */
    public function __destruct()
    {
        // intentionally left blank
    }

    /**
    * <<magic>> set selfpointer on cloned object
    */
    public function __clone()
    {
        $this->smarty = $this;
    }


    /**
    * <<magic>> Generic getter.
    *
    * Calls the appropriate getter function.
    * Issues an E_USER_NOTICE if no valid getter is found.
    *
    * @param string $name property name
    * @return mixed
    */
    public function __get($name)
    {
        $allowed = array(
        'template_dir' => 'getTemplateDir',
        'config_dir' => 'getConfigDir',
        'plugins_dir' => 'getPluginsDir',
        'compile_dir' => 'getCompileDir',
        'cache_dir' => 'getCacheDir',
        );

        if (isset($allowed[$name])) {
            return $this->{$allowed[$name]}();
        } else {
            trigger_error('Undefined property: '. get_class($this) .'::$'. $name, E_USER_NOTICE);
        }
    }

    /**
    * <<magic>> Generic setter.
    *
    * Calls the appropriate setter function.
    * Issues an E_USER_NOTICE if no valid setter is found.
    *
    * @param string $name  property name
    * @param mixed  $value parameter passed to setter
    */
    public function __set($name, $value)
    {
        $allowed = array(
        'template_dir' => 'setTemplateDir',
        'config_dir' => 'setConfigDir',
        'plugins_dir' => 'setPluginsDir',
        'compile_dir' => 'setCompileDir',
        'cache_dir' => 'setCacheDir',
        );

        if (isset($allowed[$name])) {
            $this->{$allowed[$name]}($value);
        } else {
            trigger_error('Undefined property: ' . get_class($this) . '::$' . $name, E_USER_NOTICE);
        }
    }

    /**
    * Check if a template resource exists
    *
    * @param string $resource_name template name
    * @return boolean status
    */
    public function templateExists($resource_name)
    {
        // create template object
        $save = $this->template_objects;
        $tpl = new $this->template_class($resource_name, $this);
        // check if it does exists
        $result = $tpl->source->exists;
        $this->template_objects = $save;
        return $result;
    }

    /**
    * Returns a single or all global  variables
    *
    * @param object $smarty
    * @param string $varname variable name or null
    * @return string variable value or or array of variables
    */
    public function getGlobal($varname = null)
    {
        if (isset($varname)) {
            if (isset(self::$global_tpl_vars[$varname])) {
                return self::$global_tpl_vars[$varname]->value;
            } else {
                return '';
            }
        } else {
            $_result = array();
            foreach (self::$global_tpl_vars AS $key => $var) {
                $_result[$key] = $var->value;
            }
            return $_result;
        }
    }

    /**
    * Empty cache folder
    *
    * @param integer $exp_time expiration time
    * @param string  $type     resource type
    * @return integer number of cache files deleted
    */
    function clearAllCache($exp_time = null, $type = null)
    {
        // load cache resource and call clearAll
        $_cache_resource = Smarty_CacheResource::load($this, $type);
        Smarty_CacheResource::invalidLoadedCache($this);
        return $_cache_resource->clearAll($this, $exp_time);
    }

    /**
    * Empty cache for a specific template
    *
    * @param string  $template_name template name
    * @param string  $cache_id      cache id
    * @param string  $compile_id    compile id
    * @param integer $exp_time      expiration time
    * @param string  $type          resource type
    * @return integer number of cache files deleted
    */
    public function clearCache($template_name, $cache_id = null, $compile_id = null, $exp_time = null, $type = null)
    {
        // load cache resource and call clear
        $_cache_resource = Smarty_CacheResource::load($this, $type);
        Smarty_CacheResource::invalidLoadedCache($this);
        return $_cache_resource->clear($this, $template_name, $cache_id, $compile_id, $exp_time);
    }

    /**
    * Loads security class and enables security
    *
    * @param string|Smarty_Security $security_class if a string is used, it must be class-name
    * @return Smarty current Smarty instance for chaining
    * @throws SmartyException when an invalid class name is provided
    */
    public function enableSecurity($security_class = null)
    {
        if ($security_class instanceof Smarty_Security) {
            $this->security_policy = $security_class;
            return $this;
        } elseif (is_object($security_class)) {
            throw new SmartyException("Class '" . get_class($security_class) . "' must extend Smarty_Security.");
        }
        if ($security_class == null) {
            $security_class = $this->security_class;
        }
        if (!class_exists($security_class)) {
            throw new SmartyException("Security class '$security_class' is not defined");
        } elseif ($security_class !== 'Smarty_Security' && !is_subclass_of($security_class, 'Smarty_Security')) {
            throw new SmartyException("Class '$security_class' must extend Smarty_Security.");
        } else {
            $this->security_policy = new $security_class($this);
        }

        return $this;
    }

    /**
    * Disable security
    * @return Smarty current Smarty instance for chaining
    */
    public function disableSecurity()
    {
        $this->security_policy = null;

        return $this;
    }

    /**
    * Set template directory
    *
    * @param string|array $template_dir directory(s) of template sources
    * @return Smarty current Smarty instance for chaining
    */
    public function setTemplateDir($template_dir)
    {
        $this->template_dir = array();
        foreach ((array) $template_dir as $k => $v) {
            $this->template_dir[$k] = rtrim($v, '/\\') . DS;
        }

        $this->joined_template_dir = join(DIRECTORY_SEPARATOR, $this->template_dir);
        return $this;
    }

    /**
    * Add template directory(s)
    *
    * @param string|array $template_dir directory(s) of template sources
    * @param string       $key          of the array element to assign the template dir to
    * @return Smarty current Smarty instance for chaining
    * @throws SmartyException when the given template directory is not valid
    */
    public function addTemplateDir($template_dir, $key=null)
    {
        // make sure we're dealing with an array
        $this->template_dir = (array) $this->template_dir;

        if (is_array($template_dir)) {
            foreach ($template_dir as $k => $v) {
                if (is_int($k)) {
                    // indexes are not merged but appended
                    $this->template_dir[] = rtrim($v, '/\\') . DS;
                } else {
                    // string indexes are overridden
                    $this->template_dir[$k] = rtrim($v, '/\\') . DS;
                }
            }
        } elseif ($key !== null) {
            // override directory at specified index
            $this->template_dir[$key] = rtrim($template_dir, '/\\') . DS;
        } else {
            // append new directory
            $this->template_dir[] = rtrim($template_dir, '/\\') . DS;
        }
        $this->joined_template_dir = join(DIRECTORY_SEPARATOR, $this->template_dir);
        return $this;
    }

    /**
    * Get template directories
    *
    * @param mixed index of directory to get, null to get all
    * @return array|string list of template directories, or directory of $index
    */
    public function getTemplateDir($index=null)
    {
        if ($index !== null) {
            return isset($this->template_dir[$index]) ? $this->template_dir[$index] : null;
        }

        return (array)$this->template_dir;
    }

    /**
    * Set config directory
    *
    * @param string|array $template_dir directory(s) of configuration sources
    * @return Smarty current Smarty instance for chaining
    */
    public function setConfigDir($config_dir)
    {
        $this->config_dir = array();
        foreach ((array) $config_dir as $k => $v) {
            $this->config_dir[$k] = rtrim($v, '/\\') . DS;
        }

        $this->joined_config_dir = join(DIRECTORY_SEPARATOR, $this->config_dir);
        return $this;
    }

    /**
    * Add config directory(s)
    *
    * @param string|array $config_dir directory(s) of config sources
    * @param string key of the array element to assign the config dir to
    * @return Smarty current Smarty instance for chaining
    */
    public function addConfigDir($config_dir, $key=null)
    {
        // make sure we're dealing with an array
        $this->config_dir = (array) $this->config_dir;

        if (is_array($config_dir)) {
            foreach ($config_dir as $k => $v) {
                if (is_int($k)) {
                    // indexes are not merged but appended
                    $this->config_dir[] = rtrim($v, '/\\') . DS;
                } else {
                    // string indexes are overridden
                    $this->config_dir[$k] = rtrim($v, '/\\') . DS;
                }
            }
        } elseif( $key !== null ) {
            // override directory at specified index
            $this->config_dir[$key] = rtrim($config_dir, '/\\') . DS;
        } else {
            // append new directory
            $this->config_dir[] = rtrim($config_dir, '/\\') . DS;
        }

        $this->joined_config_dir = join(DIRECTORY_SEPARATOR, $this->config_dir);
        return $this;
    }

    /**
    * Get config directory
    *
    * @param mixed index of directory to get, null to get all
    * @return array|string configuration directory
    */
    public function getConfigDir($index=null)
    {
        if ($index !== null) {
            return isset($this->config_dir[$index]) ? $this->config_dir[$index] : null;
        }

        return (array)$this->config_dir;
    }

    /**
    * Set plugins directory
    *
    * @param string|array $plugins_dir directory(s) of plugins
    * @return Smarty current Smarty instance for chaining
    */
    public function setPluginsDir($plugins_dir)
    {
        $this->plugins_dir = array();
        foreach ((array)$plugins_dir as $k => $v) {
            $this->plugins_dir[$k] = rtrim($v, '/\\') . DS;
        }

        return $this;
    }

    /**
    * Adds directory of plugin files
    *
    * @param object $smarty
    * @param string $ |array $ plugins folder
    * @return Smarty current Smarty instance for chaining
    */
    public function addPluginsDir($plugins_dir)
    {
        // make sure we're dealing with an array
        $this->plugins_dir = (array) $this->plugins_dir;

        if (is_array($plugins_dir)) {
            foreach ($plugins_dir as $k => $v) {
                if (is_int($k)) {
                    // indexes are not merged but appended
                    $this->plugins_dir[] = rtrim($v, '/\\') . DS;
                } else {
                    // string indexes are overridden
                    $this->plugins_dir[$k] = rtrim($v, '/\\') . DS;
                }
            }
        } else {
            // append new directory
            $this->plugins_dir[] = rtrim($plugins_dir, '/\\') . DS;
        }

        $this->plugins_dir = array_unique($this->plugins_dir);
        return $this;
    }

    /**
    * Get plugin directories
    *
    * @return array list of plugin directories
    */
    public function getPluginsDir()
    {
        return (array)$this->plugins_dir;
    }

    /**
    * Set compile directory
    *
    * @param string $compile_dir directory to store compiled templates in
    * @return Smarty current Smarty instance for chaining
    */
    public function setCompileDir($compile_dir)
    {
        $this->compile_dir = rtrim($compile_dir, '/\\') . DS;
        if (!isset(Smarty::$_muted_directories[$this->compile_dir])) {
            Smarty::$_muted_directories[$this->compile_dir] = null;
        }
        return $this;
    }

    /**
    * Get compiled directory
    *
    * @return string path to compiled templates
    */
    public function getCompileDir()
    {
        return $this->compile_dir;
    }

    /**
    * Set cache directory
    *
    * @param string $cache_dir directory to store cached templates in
    * @return Smarty current Smarty instance for chaining
    */
    public function setCacheDir($cache_dir)
    {
        $this->cache_dir = rtrim($cache_dir, '/\\') . DS;
        if (!isset(Smarty::$_muted_directories[$this->cache_dir])) {
            Smarty::$_muted_directories[$this->cache_dir] = null;
        }
        return $this;
    }

    /**
    * Get cache directory
    *
    * @return string path of cache directory
    */
    public function getCacheDir()
    {
        return $this->cache_dir;
    }

    /**
    * Set default modifiers
    *
    * @param array|string $modifiers modifier or list of modifiers to set
    * @return Smarty current Smarty instance for chaining
    */
    public function setDefaultModifiers($modifiers)
    {
        $this->default_modifiers = (array) $modifiers;
        return $this;
    }

    /**
    * Add default modifiers
    *
    * @param array|string $modifiers modifier or list of modifiers to add
    * @return Smarty current Smarty instance for chaining
    */
    public function addDefaultModifiers($modifiers)
    {
        if (is_array($modifiers)) {
            $this->default_modifiers = array_merge($this->default_modifiers, $modifiers);
        } else {
            $this->default_modifiers[] = $modifiers;
        }

        return $this;
    }

    /**
    * Get default modifiers
    *
    * @return array list of default modifiers
    */
    public function getDefaultModifiers()
    {
        return $this->default_modifiers;
    }


    /**
    * Set autoload filters
    *
    * @param array $filters filters to load automatically
    * @param string $type "pre", "output", … specify the filter type to set. Defaults to none treating $filters' keys as the appropriate types
    * @return Smarty current Smarty instance for chaining
    */
    public function setAutoloadFilters($filters, $type=null)
    {
        if ($type !== null) {
            $this->autoload_filters[$type] = (array) $filters;
        } else {
            $this->autoload_filters = (array) $filters;
        }

        return $this;
    }

    /**
    * Add autoload filters
    *
    * @param array $filters filters to load automatically
    * @param string $type "pre", "output", … specify the filter type to set. Defaults to none treating $filters' keys as the appropriate types
    * @return Smarty current Smarty instance for chaining
    */
    public function addAutoloadFilters($filters, $type=null)
    {
        if ($type !== null) {
            if (!empty($this->autoload_filters[$type])) {
                $this->autoload_filters[$type] = array_merge($this->autoload_filters[$type], (array) $filters);
            } else {
                $this->autoload_filters[$type] = (array) $filters;
            }
        } else {
            foreach ((array) $filters as $key => $value) {
                if (!empty($this->autoload_filters[$key])) {
                    $this->autoload_filters[$key] = array_merge($this->autoload_filters[$key], (array) $value);
                } else {
                    $this->autoload_filters[$key] = (array) $value;
                }
            }
        }

        return $this;
    }

    /**
    * Get autoload filters
    *
    * @param string $type type of filter to get autoloads for. Defaults to all autoload filters
    * @return array array( 'type1' => array( 'filter1', 'filter2', … ) ) or array( 'filter1', 'filter2', …) if $type was specified
    */
    public function getAutoloadFilters($type=null)
    {
        if ($type !== null) {
            return isset($this->autoload_filters[$type]) ? $this->autoload_filters[$type] : array();
        }

        return $this->autoload_filters;
    }

    /**
    * return name of debugging template
    *
    * @return string
    */
    public function getDebugTemplate()
    {
        return $this->debug_tpl;
    }

    /**
    * set the debug template
    *
    * @param string $tpl_name
    * @return Smarty current Smarty instance for chaining
    * @throws SmartyException if file is not readable
    */
    public function setDebugTemplate($tpl_name)
    {
        if (!is_readable($tpl_name)) {
            throw new SmartyException("Unknown file '{$tpl_name}'");
        }
        $this->debug_tpl = $tpl_name;

        return $this;
    }

    /**
    * creates a template object
    *
    * @param string $template the resource handle of the template file
    * @param mixed $cache_id cache id to be used with this template
    * @param mixed $compile_id compile id to be used with this template
    * @param object $parent next higher level of Smarty variables
    * @param boolean $do_clone flag is Smarty object shall be cloned
    * @return object template object
    */
    public function createTemplate($template, $cache_id = null, $compile_id = null, $parent = null, $do_clone = true)
    {
        if (!empty($cache_id) && (is_object($cache_id) || is_array($cache_id))) {
            $parent = $cache_id;
            $cache_id = null;
        }
        if (!empty($parent) && is_array($parent)) {
            $data = $parent;
            $parent = null;
        } else {
            $data = null;
        }
        // default to cache_id and compile_id of Smarty object
        $cache_id = $cache_id === null ? $this->cache_id : $cache_id;
        $compile_id = $compile_id === null ? $this->compile_id : $compile_id;
        // already in template cache?
        if ($this->allow_ambiguous_resources) {
            $_templateId = Smarty_Resource::getUniqueTemplateName($this, $template) . $cache_id . $compile_id;
        } else {
            $_templateId = $this->joined_template_dir . '#' . $template . $cache_id . $compile_id;
        }
        if (isset($_templateId[150])) {
            $_templateId = sha1($_templateId);
        }
        if ($do_clone) {
            if (isset($this->template_objects[$_templateId])) {
                // return cached template object
                $tpl = clone $this->template_objects[$_templateId];
                $tpl->smarty = clone $tpl->smarty;
                $tpl->parent = $parent;
                $tpl->tpl_vars = array();
                $tpl->config_vars = array();
            } else {
                $tpl = new $this->template_class($template, clone $this, $parent, $cache_id, $compile_id);
            }
        } else {
            if (isset($this->template_objects[$_templateId])) {
                // return cached template object
                $tpl = $this->template_objects[$_templateId];
                $tpl->parent = $parent;
                $tpl->tpl_vars = array();
                $tpl->config_vars = array();
            } else {
                $tpl = new $this->template_class($template, $this, $parent, $cache_id, $compile_id);
            }
        }
        // fill data if present
        if (!empty($data) && is_array($data)) {
            // set up variable values
            foreach ($data as $_key => $_val) {
                $tpl->tpl_vars[$_key] = new Smarty_variable($_val);
            }
        }
        return $tpl;
    }


    /**
    * Takes unknown classes and loads plugin files for them
    * class name format: Smarty_PluginType_PluginName
    * plugin filename format: plugintype.pluginname.php
    *
    * @param string $plugin_name    class plugin name to load
    * @param bool   $check          check if already loaded
    * @return string |boolean filepath of loaded file or false
    */
    public function loadPlugin($plugin_name, $check = true)
    {
        // if function or class exists, exit silently (already loaded)
        if ($check && (is_callable($plugin_name) || class_exists($plugin_name, false))) {
            return true;
        }
        // Plugin name is expected to be: Smarty_[Type]_[Name]
        $_name_parts = explode('_', $plugin_name, 3);
        // class name must have three parts to be valid plugin
        // count($_name_parts) < 3 === !isset($_name_parts[2])
        if (!isset($_name_parts[2]) || strtolower($_name_parts[0]) !== 'smarty') {
            throw new SmartyException("plugin {$plugin_name} is not a valid name format");
            return false;
        }
        // if type is "internal", get plugin from sysplugins
        if (strtolower($_name_parts[1]) == 'internal') {
            $file = SMARTY_SYSPLUGINS_DIR . strtolower($plugin_name) . '.php';
            if (file_exists($file)) {
                require_once($file);
                return $file;
            } else {
                return false;
            }
        }
        // plugin filename is expected to be: [type].[name].php
        $_plugin_filename = "{$_name_parts[1]}.{$_name_parts[2]}.php";

        // loop through plugin dirs and find the plugin
        foreach($this->getPluginsDir() as $_plugin_dir) {
            $names = array(
                $_plugin_dir . $_plugin_filename,
                $_plugin_dir . strtolower($_plugin_filename),
            );
            foreach ($names as $file) {
                if (file_exists($file)) {
                    require_once($file);
                    return $file;
                }
                if ($this->use_include_path && !preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_plugin_dir)) {
                    // try PHP include_path
                    if (($file = Smarty_Internal_Get_Include_Path::getIncludePath($file)) !== false) {
                        require_once($file);
                        return $file;
                    }
                }
            }
        }
        // no plugin loaded
        return false;
    }

    /**
    * Compile all template files
    *
    * @param string $extension file extension
    * @param bool $force_compile force all to recompile
    * @param int $time_limit
    * @param int $max_errors
    * @return integer number of template files recompiled
    */
    public function compileAllTemplates($extention = '.tpl', $force_compile = false, $time_limit = 0, $max_errors = null)
    {
        return Smarty_Internal_Utility::compileAllTemplates($extention, $force_compile, $time_limit, $max_errors, $this);
    }

    /**
    * Compile all config files
    *
    * @param string $extension file extension
    * @param bool $force_compile force all to recompile
    * @param int $time_limit
    * @param int $max_errors
    * @return integer number of template files recompiled
    */
    public function compileAllConfig($extention = '.conf', $force_compile = false, $time_limit = 0, $max_errors = null)
    {
        return Smarty_Internal_Utility::compileAllConfig($extention, $force_compile, $time_limit, $max_errors, $this);
    }

    /**
    * Delete compiled template file
    *
    * @param string $resource_name template name
    * @param string $compile_id compile id
    * @param integer $exp_time expiration time
    * @return integer number of template files deleted
    */
    public function clearCompiledTemplate($resource_name = null, $compile_id = null, $exp_time = null)
    {
        return Smarty_Internal_Utility::clearCompiledTemplate($resource_name, $compile_id, $exp_time, $this);
    }


    /**
    * Return array of tag/attributes of all tags used by an template
    *
    * @param object $templae template object
    * @return array of tag/attributes
    */
    public function getTags(Smarty_Internal_Template $template)
    {
        return Smarty_Internal_Utility::getTags($template);
    }

    /**
     * Run installation test
     *
     * @param array $errors Array to write errors into, rather than outputting them
     * @return boolean true if setup is fine, false if something is wrong
     */
    public function testInstall(&$errors=null)
    {
        return Smarty_Internal_Utility::testInstall($this, $errors);
    }

    /**
     * Error Handler to mute expected messages
     *
     * @link http://php.net/set_error_handler
     * @param integer $errno Error level
     * @return boolean
     */
    public static function mutingErrorHandler($errno, $errstr, $errfile, $errline, $errcontext)
    {
        $_is_muted_directory = false;

        // add the SMARTY_DIR to the list of muted directories
        if (!isset(Smarty::$_muted_directories[SMARTY_DIR])) {
            $smarty_dir = realpath(SMARTY_DIR);
            Smarty::$_muted_directories[SMARTY_DIR] = array(
                'file' => $smarty_dir,
                'length' => strlen($smarty_dir),
            );
        }

        // walk the muted directories and test against $errfile
        foreach (Smarty::$_muted_directories as $key => &$dir) {
            if (!$dir) {
                // resolve directory and length for speedy comparisons
                $file = realpath($key);
                $dir = array(
                    'file' => $file,
                    'length' => strlen($file),
                );
            }
            if (!strncmp($errfile, $dir['file'], $dir['length'])) {
                $_is_muted_directory = true;
                break;
            }
        }

        // pass to next error handler if this error did not occur inside SMARTY_DIR
        // or the error was within smarty but masked to be ignored
        if (!$_is_muted_directory || ($errno && $errno & error_reporting())) {
            if (Smarty::$_previous_error_handler) {
                return call_user_func(Smarty::$_previous_error_handler, $errno, $errstr, $errfile, $errline, $errcontext);
            } else {
                return false;
            }
        }
    }

    /**
     * Enable error handler to mute expected messages
     *
     * @return void
     */
    public static function muteExpectedErrors()
    {
        /*
            error muting is done because some people implemented custom error_handlers using
            http://php.net/set_error_handler and for some reason did not understand the following paragraph:

                It is important to remember that the standard PHP error handler is completely bypassed for the
                error types specified by error_types unless the callback function returns FALSE.
                error_reporting() settings will have no effect and your error handler will be called regardless -
                however you are still able to read the current value of error_reporting and act appropriately.
                Of particular note is that this value will be 0 if the statement that caused the error was
                prepended by the @ error-control operator.

            Smarty deliberately uses @filemtime() over file_exists() and filemtime() in some places. Reasons include
                - @filemtime() is almost twice as fast as using an additional file_exists()
                - between file_exists() and filemtime() a possible race condition is opened,
                  which does not exist using the simple @filemtime() approach.
        */
        $error_handler = array('Smarty', 'mutingErrorHandler');
        $previous = set_error_handler($error_handler);

        // avoid dead loops
        if ($previous !== $error_handler) {
            Smarty::$_previous_error_handler = $previous;
        }
    }

    /**
     * Disable error handler muting expected messages
     *
     * @return void
     */
    public static function unmuteExpectedErrors()
    {
        restore_error_handler();
    }
}

/**
* Smarty exception class
* @package Smarty
*/
class SmartyException extends Exception {
}

/**
* Smarty compiler exception class
* @package Smarty
*/
class SmartyCompilerException extends SmartyException  {
}

/**
* Autoloader
*/
function smartyAutoload($class)
{
    $_class = strtolower($class);
    $_classes = array(
        'smarty_config_source' => true,
        'smarty_config_compiled' => true,
        'smarty_security' => true,
        'smarty_cacheresource' => true,
        'smarty_cacheresource_custom' => true,
        'smarty_cacheresource_keyvaluestore' => true,
        'smarty_resource' => true,
        'smarty_resource_custom' => true,
        'smarty_resource_uncompiled' => true,
        'smarty_resource_recompiled' => true,
    );

    if (!strncmp($_class, 'smarty_internal_', 16) || isset($_classes[$_class])) {
        include SMARTY_SYSPLUGINS_DIR . $_class . '.php';
    }
}

?>