Fixes #4040: Added `$viewFile` and `$params` to the `EVENT_BEFORE_RENDER` and…

docs/guide/runtime-url-handling.md

-URL Management
-==============
+URL Parsing and Generation
+==========================
 
 > Note: This section is under development.
 

framework/CHANGELOG.md

@@ -7,6 +7,7 @@ Yii Framework 2 Change Log
 - Bug #5260: `yii\i18n\Formatter::decimalSeparator` and `yii\i18n\Formatter::thousandSeparator` where not configurable when intl is not installed (execut, cebe)
 - Bug #5314: Fixed typo in the implementation of `yii\web\Session::getHasSessionId()` (qiangxue)
 - Bug: Date and time formatting now assumes UTC as the timezone for input dates unless a timezone is explicitly given (cebe)
+- Enh #4040: Added `$viewFile` and `$params` to the `EVENT_BEFORE_RENDER` and `EVENT_AFTER_RENDER` events for `View` (qiangxue) 
 - Enh #4275: Added `removeChildren()` to `yii\rbac\ManagerInterface` and implementations (samdark)
 - Enh: Added `yii\base\Application::loadedModules` (qiangxue)
 - Chg #2037: Dropped the support for using `yii\base\Module` as concrete module classes (qiangxue)

framework/UPGRADE.md

@@ -21,6 +21,9 @@ Upgrade from Yii 2.0 RC
   
 * `yii\bootstrap\Collapse` is now encoding labels by default. `encode` item option and global `encodeLabels` property were
  introduced to disable it. Keys are no longer used as labels. You need to remove keys and use `label` item option instead.
+ 
+* The `yii\base\View::beforeRender()` and `yii\base\View::afterRender()` methods have two extra parameters `$viewFile`
+  and `$params`. If you are overriding these methods, you should adjust the method signature accordingly.
 
 
 Upgrade from Yii 2.0 Beta

framework/base/View.php

@@ -233,7 +233,7 @@ class View extends Component
         $output = '';
         $this->_viewFiles[] = $viewFile;
 
-        if ($this->beforeRender()) {
+        if ($this->beforeRender($viewFile, $params)) {
             Yii::trace("Rendering view file: $viewFile", __METHOD__);
             $ext = pathinfo($viewFile, PATHINFO_EXTENSION);
             if (isset($this->renderers[$ext])) {
@@ -246,7 +246,7 @@ class View extends Component
             } else {
                 $output = $this->renderPhpFile($viewFile, $params);
             }
-            $this->afterRender($output);
+            $this->afterRender($viewFile, $params, $output);
         }
 
         array_pop($this->_viewFiles);
@@ -267,11 +267,16 @@ class View extends Component
      * This method is invoked right before [[renderFile()]] renders a view file.
      * The default implementation will trigger the [[EVENT_BEFORE_RENDER]] event.
      * If you override this method, make sure you call the parent implementation first.
+     * @param string $viewFile the view file to be rendered.
+     * @param array $params the parameter array passed to the [[render()]] method.
      * @return boolean whether to continue rendering the view file.
      */
-    public function beforeRender()
+    public function beforeRender($viewFile, $params)
     {
-        $event = new ViewEvent;
+        $event = new ViewEvent([
+            'viewFile' => $viewFile,
+            'params' => $params,
+        ]);
         $this->trigger(self::EVENT_BEFORE_RENDER, $event);
 
         return $event->isValid;
@@ -281,14 +286,19 @@ class View extends Component
      * This method is invoked right after [[renderFile()]] renders a view file.
      * The default implementation will trigger the [[EVENT_AFTER_RENDER]] event.
      * If you override this method, make sure you call the parent implementation first.
+     * @param string $viewFile the view file being rendered.
+     * @param array $params the parameter array passed to the [[render()]] method.
      * @param string $output the rendering result of the view file. Updates to this parameter
      * will be passed back and returned by [[renderFile()]].
      */
-    public function afterRender(&$output)
+    public function afterRender($viewFile, $params, &$output)
     {
         if ($this->hasEventHandlers(self::EVENT_AFTER_RENDER)) {
-            $event = new ViewEvent;
-            $event->output = $output;
+            $event = new ViewEvent([
+                'viewFile' => $viewFile,
+                'params' => $params,
+                'output' => $output,
+            ]);
             $this->trigger(self::EVENT_AFTER_RENDER, $event);
             $output = $event->output;
         }

framework/base/ViewEvent.php

@@ -16,6 +16,14 @@ namespace yii\base;
 class ViewEvent extends Event
 {
     /**
+     * @var string the view file being rendered.
+     */
+    public $viewFile;
+    /**
+     * @var array the parameter array passed to the [[View::render()]] method.
+     */
+    public $params;
+    /**
      * @var string the rendering result of [[View::renderFile()]].
      * Event handlers may modify this property and the modified output will be
      * returned by [[View::renderFile()]]. This property is only used