Use autoloading for plugin classes

inc/load.php

@@ -43,7 +43,7 @@ require_once(DOKU_INC.'inc/auth.php');
  * require()s their associated php files when an object is instantiated.
  *
  * @author Andreas Gohr <andi@splitbrain.org>
- * @todo   add generic loading of plugins and other generically named classes
+ * @todo   add generic loading of renderers and auth backends
  */
 function load_autoload($name){
     static $classes = null;
@@ -87,5 +87,16 @@ function load_autoload($name){
         require_once($classes[$name]);
         return;
     }
+
+    // Plugin loading
+    if(preg_match('/^(helper|syntax|action|admin|renderer)_plugin_([^_]+)(?:_([^_]+))?$/',
+                  $name, $m)) {
+                //try to load the wanted plugin file
+        // include, but be silent. Maybe some other autoloader has an idea
+        // how to load this class.
+        $c = ((count($m) === 4) ? "/{$m[3]}" : '');
+        @include DOKU_PLUGIN . "{$m[2]}/{$m[1]}$c.php";
+        return;
+    }
 }
 

inc/plugincontroller.class.php

@@ -72,32 +72,21 @@ class Doku_Plugin_Controller {
             return null;
         }
 
+        $class = $type.'_plugin_'.$name;
+
         //plugin already loaded?
         if(!empty($DOKU_PLUGINS[$type][$name])){
             if ($new || !$DOKU_PLUGINS[$type][$name]->isSingleton()) {
-                $class = $type.'_plugin_'.$name;
-                return class_exists($class) ? new $class : null;
+                return class_exists($class, true) ? new $class : null;
             } else {
                 return $DOKU_PLUGINS[$type][$name];
             }
         }
 
-        //try to load the wanted plugin file
-        $dir = $this->get_directory($plugin);
-        $file = $component ? "$type/$component.php" : "$type.php";
-
-        if(!is_file(DOKU_PLUGIN."$dir/$file")){
-            return null;
-        }
-
-        if (!include_once(DOKU_PLUGIN."$dir/$file")) {
-            return null;
-        }
-
         //construct class and instantiate
-        $class = $type.'_plugin_'.$name;
-        if (!class_exists($class)){
+        if (!class_exists($class, true)) {
             # the plugin might be in the wrong directory
+            $dir = $this->get_directory($plugin);
             $inf = confToHash(DOKU_PLUGIN."$dir/plugin.info.txt");
             if($inf['base'] && $inf['base'] != $plugin){
                 msg("Plugin installed incorrectly. Rename plugin directory '".