Subversion-Projekte lars-tiefland.prado

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/**
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* the interface for all shell extensions
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*
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* Extension can hook into the execution of the shell
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*
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* examples:
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* - execution time for parsing and execute
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* - colours for the output
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* - inline help
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*
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*
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*/
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interface PHP_Shell_Extension {
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    public function register();
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}
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/**
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* storage class for Shell Extensions
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*
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*
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*/
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class PHP_Shell_Extensions {
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    /**
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    * @var PHP_Shell_Extensions
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    */
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    static protected $instance;
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    /**
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    * storage for the extension
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    *
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    * @var array
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    */
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    protected $exts = array();
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    /**
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    * the extension object gives access to the register objects
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    * through the a simple $exts->name->...
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    *
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    * @param string registered name of the extension
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    * @return PHP_Shell_Extension object handle
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    */
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    public function __get($key) {
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        if (!isset($this->exts[$key])) {
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            throw new Exception("Extension $s is not known.");
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        }
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        return $this->exts[$key];
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    }
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    /**
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    * register set of extensions
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    *
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    * @param array set of (name, class-name) pairs
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    */
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    public function registerExtensions($exts) {
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        foreach ($exts as $k => $v) {
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            $this->registerExtension($k, $v);
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        }
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    }
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    /**
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    * register a single extension
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    *
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    * @param string name of the registered extension
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    * @param PHP_Shell_Extension the extension object
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    */
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    public function registerExtension($k, PHP_Shell_Extension $obj) {
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        $obj->register();
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        $this->exts[$k] = $obj;
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    }
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    /**
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    * @return object a singleton of the class
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    */
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    static function getInstance() {
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        if (is_null(self::$instance)) {
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            $class = __CLASS__;
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            self::$instance = new $class();
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        }
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        return self::$instance;
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    }
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}
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