Add ViewHelper

Closes #35

Classes/ViewHelpers/DebugbarViewHelper.php

@@ -0,0 +1,29 @@
+<?php namespace Konafets\Typo3Debugbar\ViewHelpers;
+
+use Konafets\Typo3Debugbar\Overrides\DebuggerUtility;
+use Konafets\Typo3Debugbar\Typo3DebugBar;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper;
+
+class DebugbarViewHelper extends AbstractViewHelper
+{
+    /**
+     * Displays the debug information in the PHP Debug Bar
+     *
+     * @param null|string $content
+     */
+    public function render($content = null)
+    {
+        if(is_null($content)) {
+            $content = $this->renderChildren();
+        }
+
+        /** @var Typo3DebugBar $debugBar */
+        $debugBar = GeneralUtility::makeInstance(Typo3DebugBar::class);
+        if ($debugBar->isEnabled()) {
+            DebuggerUtility::var_dump($content);
+        }
+
+        return;
+    }
+}

README.rst

@@ -75,7 +75,7 @@ can get the same instance via ``debugbar()``. This opens the
 possibility to interact with the DebugBar from within TYPO3.
 
 Log Exceptions
---------------
+^^^^^^^^^^^^^
 
 .. code:: php
 
@@ -155,14 +155,25 @@ and its unclear if the DebugBar is enabled or not. Classical
 *Chicken-and-egg* problem.
 
 VarDump
---------
+-------
 
 Everybody knows the output of DebugUtility::var_dump() ... and everybody knows that it breaks the layout. Lets move the output
 to the TYPO3 Debugbar. Use ``Konafets\Typo3Debugbar\Overrides\DebuggerUtility::var_dump($variable)`` and get an output like this:
 
 .. figure:: https://raw.githubusercontent.com/konafets/typo3_debugbar/develop/Documentation/Images/VarDumpPane.png
    :alt: VarDumpPane
 
+ViewHelper
+----------
+
+The extension comes with a ViewHelper included to pipe the content of a variable to the DebugBar.
+
+.. code:: html
+
+    {namespace k=Konafets\Typo3Debugbar\ViewHelpers}
+
+    <k:debugbar>{teaser}</k:debugbar>
+
 *********
 Lifecycle
 *********
@@ -182,6 +193,8 @@ Debugbar <https://github.com/barryvdh/laravel-debugbar>`__. Thanks for
 your good work `Barry vd. Heuvel <https://github.com/barryvdh>`__. I
 also copied the idea of a ServiceProvider from Laravel.
 
+The idea and the initial version of the ViewHelper was provided by @KaffDaddy.
+
 .. |Build Status| image:: https://travis-ci.org/Konafets/typo3_debugbar.svg?branch=master
    :target: https://travis-ci.org/Konafets/typo3_debugbar
 .. |Latest Stable Version| image:: https://poser.pugx.org/konafets/typo3_debugbar/v/stable