| | |
| | | /* |
| | | +-----------------------------------------------------------------------+ |
| | | | This file is part of the Roundcube Webmail client | |
| | | | Copyright (C) 2008-2011, The Roundcube Dev Team | |
| | | | Copyright (C) 2008-2012, The Roundcube Dev Team | |
| | | | | |
| | | | Licensed under the GNU General Public License version 3 or | |
| | | | any later version with exceptions for skins & plugins. | |
| | |
| | | */ |
| | | |
| | | // location where plugins are loade from |
| | | if (!defined('RCUBE_PLUGINS_DIR')) |
| | | if (!defined('RCUBE_PLUGINS_DIR')) { |
| | | define('RCUBE_PLUGINS_DIR', RCUBE_INSTALL_PATH . 'plugins/'); |
| | | |
| | | } |
| | | |
| | | /** |
| | | * The plugin loader and global API |
| | |
| | | public $url = 'plugins/'; |
| | | public $task = ''; |
| | | public $output; |
| | | |
| | | public $handlers = array(); |
| | | |
| | | protected $plugins = array(); |
| | | protected $tasks = array(); |
| | | protected $actions = array(); |
| | |
| | | return self::$instance; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Private constructor |
| | | */ |
| | |
| | | { |
| | | $this->dir = slashify(RCUBE_PLUGINS_DIR); |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Initialize plugin engine |
| | |
| | | // register an internal hook |
| | | $this->register_hook('template_container', array($this, 'template_container_hook')); |
| | | |
| | | // maybe also register a shudown function which triggers shutdown functions of all plugin objects |
| | | // maybe also register a shudown function which triggers |
| | | // shutdown functions of all plugin objects |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Load and init all enabled plugins |
| | |
| | | } |
| | | |
| | | // load required core plugin if no derivate was found |
| | | if (!$loaded) |
| | | if (!$loaded) { |
| | | $loaded = $this->load_plugin($plugin_name); |
| | | } |
| | | |
| | | // trigger fatal error if still not loaded |
| | | if (!$loaded) { |
| | | rcube::raise_error(array('code' => 520, 'type' => 'php', |
| | | rcube::raise_error(array( |
| | | 'code' => 520, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Requried plugin $plugin_name was not loaded"), true, true); |
| | | } |
| | |
| | | * Load the specified plugin |
| | | * |
| | | * @param string Plugin name |
| | | * |
| | | * @return boolean True on success, false if not loaded or failure |
| | | */ |
| | | public function load_plugin($plugin_name) |
| | |
| | | } |
| | | |
| | | // plugin already loaded |
| | | if ($this->plugins[$plugin_name] || class_exists($plugin_name, false)) |
| | | if ($this->plugins[$plugin_name] || class_exists($plugin_name, false)) { |
| | | return true; |
| | | } |
| | | |
| | | $fn = $plugins_dir . DIRECTORY_SEPARATOR . $plugin_name . DIRECTORY_SEPARATOR . $plugin_name . '.php'; |
| | | $fn = $plugins_dir . DIRECTORY_SEPARATOR . $plugin_name |
| | | . DIRECTORY_SEPARATOR . $plugin_name . '.php'; |
| | | |
| | | if (file_exists($fn)) { |
| | | include($fn); |
| | | include $fn; |
| | | |
| | | // instantiate class if exists |
| | | if (class_exists($plugin_name, false)) { |
| | |
| | | else { |
| | | rcube::raise_error(array('code' => 520, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "No plugin class $plugin_name found in $fn"), true, false); |
| | | 'message' => "No plugin class $plugin_name found in $fn"), |
| | | true, false); |
| | | } |
| | | } |
| | | else { |
| | |
| | | |
| | | return false; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Allows a plugin object to register a callback for a certain hook |
| | |
| | | if (isset($this->deprecated_hooks[$hook])) { |
| | | rcube::raise_error(array('code' => 522, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Deprecated hook name. ".$hook.' -> '.$this->deprecated_hooks[$hook]), true, false); |
| | | 'message' => "Deprecated hook name. " |
| | | . $hook . ' -> ' . $this->deprecated_hooks[$hook]), true, false); |
| | | $hook = $this->deprecated_hooks[$hook]; |
| | | } |
| | | $this->handlers[$hook][] = $callback; |
| | | } |
| | | else |
| | | else { |
| | | rcube::raise_error(array('code' => 521, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Invalid callback function for $hook"), true, false); |
| | | } |
| | | } |
| | | |
| | | /** |
| | |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Triggers a plugin hook. |
| | | * This is called from the application and executes all registered handlers |
| | | * |
| | | * @param string $hook Hook name |
| | | * @param array $args Named arguments (key->value pairs) |
| | | * |
| | | * @return array The (probably) altered hook arguments |
| | | */ |
| | | public function exec_hook($hook, $args = array()) |
| | | { |
| | | if (!is_array($args)) |
| | | if (!is_array($args)) { |
| | | $args = array('arg' => $args); |
| | | } |
| | | |
| | | $args += array('abort' => false); |
| | | $this->active_hook = $hook; |
| | | |
| | | foreach ((array)$this->handlers[$hook] as $callback) { |
| | | $ret = call_user_func($callback, $args); |
| | | if ($ret && is_array($ret)) |
| | | if ($ret && is_array($ret)) { |
| | | $args = $ret + $args; |
| | | } |
| | | |
| | | if ($args['abort']) |
| | | if ($args['abort']) { |
| | | break; |
| | | } |
| | | } |
| | | |
| | | $this->active_hook = false; |
| | | return $args; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Let a plugin register a handler for a specific request |
| | |
| | | else { |
| | | rcube::raise_error(array('code' => 523, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Cannot register action $action; already taken by another plugin"), true, false); |
| | | 'message' => "Cannot register action $action;" |
| | | ." already taken by another plugin"), true, false); |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * This method handles requests like _task=mail&_action=plugin.foo |
| | |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Register a handler function for template objects |
| | | * |
| | |
| | | public function register_handler($name, $owner, $callback) |
| | | { |
| | | // check name |
| | | if (strpos($name, 'plugin.') !== 0) |
| | | if (strpos($name, 'plugin.') !== 0) { |
| | | $name = 'plugin.'.$name; |
| | | } |
| | | |
| | | // can register handler only if it's not taken or registered by myself |
| | | if (is_object($this->output) && (!isset($this->objectsmap[$name]) || $this->objectsmap[$name] == $owner)) { |
| | | if (is_object($this->output) |
| | | && (!isset($this->objectsmap[$name]) || $this->objectsmap[$name] == $owner) |
| | | ) { |
| | | $this->output->add_handler($name, $callback); |
| | | $this->objectsmap[$name] = $owner; |
| | | } |
| | | else { |
| | | rcube::raise_error(array('code' => 525, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Cannot register template handler $name; already taken by another plugin or no output object available"), true, false); |
| | | 'message' => "Cannot register template handler $name;" |
| | | ." already taken by another plugin or no output object available"), true, false); |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Register this plugin to be responsible for a specific task |
| | |
| | | public function register_task($task, $owner) |
| | | { |
| | | // tasks are irrelevant in framework mode |
| | | if (!class_exists('rcmail', false)) |
| | | if (!class_exists('rcmail', false)) { |
| | | return true; |
| | | } |
| | | |
| | | if ($task != asciiwords($task)) { |
| | | rcube::raise_error(array('code' => 526, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Invalid task name: $task. Only characters [a-z0-9_.-] are allowed"), true, false); |
| | | 'message' => "Invalid task name: $task." |
| | | ." Only characters [a-z0-9_.-] are allowed"), true, false); |
| | | } |
| | | else if (in_array($task, rcmail::$main_tasks)) { |
| | | rcube::raise_error(array('code' => 526, 'type' => 'php', |
| | | 'file' => __FILE__, 'line' => __LINE__, |
| | | 'message' => "Cannot register taks $task; already taken by another plugin or the application itself"), true, false); |
| | | 'message' => "Cannot register taks $task;" |
| | | ." already taken by another plugin or the application itself"), true, false); |
| | | } |
| | | else { |
| | | $this->tasks[$task] = $owner; |
| | |
| | | return false; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Checks whether the given task is registered by a plugin |
| | | * |
| | | * @param string $task Task name |
| | | * |
| | | * @return boolean True if registered, otherwise false |
| | | */ |
| | | public function is_plugin_task($task) |
| | |
| | | return $this->tasks[$task] ? true : false; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Check if a plugin hook is currently processing. |
| | | * Mainly used to prevent loops and recursion. |
| | | * |
| | | * @param string $hook Hook to check (optional) |
| | | * |
| | | * @return boolean True if any/the given hook is currently processed, otherwise false |
| | | */ |
| | | public function is_processing($hook = null) |
| | |
| | | { |
| | | if (is_object($this->output) && $this->output->type == 'html') { |
| | | $src = $this->resource_url($fn); |
| | | $this->output->add_header(html::tag('script', array('type' => "text/javascript", 'src' => $src))); |
| | | $this->output->add_header(html::tag('script', |
| | | array('type' => "text/javascript", 'src' => $src))); |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Include a plugin stylesheet in the current HTML page |
| | |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Save the given HTML content to be added to a template container |
| | | * |
| | |
| | | $this->template_contents[$container] .= $html . "\n"; |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Returns list of loaded plugins names |
| | | * |
| | |
| | | { |
| | | return array_keys($this->plugins); |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Callback for template_container hooks |
| | |
| | | $container = $attrib['name']; |
| | | return array('content' => $attrib['content'] . $this->template_contents[$container]); |
| | | } |
| | | |
| | | |
| | | /** |
| | | * Make the given file name link into the plugins directory |
| | |
| | | else |
| | | return $fn; |
| | | } |
| | | |
| | | } |