From 0b341c6db1021e2a5bac2b32332fb603f39233b8 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Thu, 4 Oct 2018 06:46:32 +0200
Subject: [PATCH] ConfigDiff: allow Inline diff, cleanup, css

---
 library/Director/ConfigDiff.php | 68 +++++++++++++++++----------------
 public/css/module.less          | 15 ++++++++
 2 files changed, 51 insertions(+), 32 deletions(-)

diff --git a/library/Director/ConfigDiff.php b/library/Director/ConfigDiff.php
index 3f5c1a7a..d439a2da 100644
--- a/library/Director/ConfigDiff.php
+++ b/library/Director/ConfigDiff.php
@@ -3,11 +3,8 @@
 namespace Icinga\Module\Director;
 
 use Diff;
-use Diff_Renderer_Html_Inline;
-use Diff_Renderer_Html_SideBySide;
-use Diff_Renderer_Text_Context;
-use Diff_Renderer_Text_Unified;
 use dipl\Html\ValidHtml;
+use InvalidArgumentException;
 
 class ConfigDiff implements ValidHtml
 {
@@ -16,29 +13,40 @@ class ConfigDiff implements ValidHtml
     protected $b;
 
     protected $diff;
-    protected $opcodes;
+
+    protected $htmlRenderer = 'SideBySide';
+
+    protected $knownHtmlRenderers = [
+        'SideBySide',
+        'Inline',
+    ];
+
+    protected $knownTextRenderers = [
+        'Context',
+        'Unified',
+    ];
 
     protected function __construct($a, $b)
     {
         require_once dirname(__DIR__) . '/vendor/php-diff/lib/Diff.php';
 
         if (empty($a)) {
-            $this->a = array();
+            $this->a = [];
         } else {
             $this->a = explode("\n", (string) $a);
         }
 
         if (empty($b)) {
-            $this->b = array();
+            $this->b = [];
         } else {
             $this->b = explode("\n", (string) $b);
         }
 
-        $options = array(
+        $options = [
             'context' => 5,
             // 'ignoreWhitespace' => true,
             // 'ignoreCase' => true,
-        );
+        ];
         $this->diff = new Diff($this->a, $this->b, $options);
     }
 
@@ -52,35 +60,32 @@ class ConfigDiff implements ValidHtml
      */
     public function renderHtml()
     {
-        return $this->renderHtmlSideBySide();
+        return $this->diff->Render($this->getHtmlRenderer());
     }
 
-    public function renderHtmlSideBySide()
+    public function setHtmlRenderer($name)
     {
-        require_once dirname(__DIR__)  . '/vendor/php-diff/lib/Diff/Renderer/Html/SideBySide.php';
-        $renderer = new Diff_Renderer_Html_SideBySide;
-        return $this->diff->Render($renderer);
+        if (in_array($name, $this->knownHtmlRenderers)) {
+            $this->htmlRenderer = $name;
+        } else {
+            throw new InvalidArgumentException("There is no known '$name' renderer");
+        }
+
+        return $this;
     }
 
-    public function renderHtmlInline()
+    protected function getHtmlRenderer()
     {
-        require_once dirname(__DIR__)  . '/vendor/php-diff/lib/Diff/Renderer/Html/Inline.php';
-        $renderer = new Diff_Renderer_Html_Inline;
-        return $this->diff->Render($renderer);
-    }
+        $filename = sprintf(
+            '%s/vendor/php-diff/lib/Diff/Renderer/Html/%s.php',
+            dirname(__DIR__),
+            $this->htmlRenderer
+        );
+        require_once($filename);
 
-    public function renderTextContext()
-    {
-        require_once dirname(__DIR__)  . '/vendor/php-diff/lib/Diff/Renderer/Text/Context.php';
-        $renderer = new Diff_Renderer_Text_Context;
-        return $this->diff->Render($renderer);
-    }
+        $class = 'Diff_Renderer_Html_' . $this->htmlRenderer;
 
-    public function renderTextUnified()
-    {
-        require_once dirname(__DIR__)  . '/vendor/php-diff/lib/Diff/Renderer/Text/Context.php';
-        $renderer = new Diff_Renderer_Text_Unified;
-        return $this->diff->Render($renderer);
+        return new $class;
     }
 
     public function __toString()
@@ -90,7 +95,6 @@ class ConfigDiff implements ValidHtml
 
     public static function create($a, $b)
     {
-        $diff = new static($a, $b);
-        return $diff;
+        return new static($a, $b);
     }
 }
diff --git a/public/css/module.less b/public/css/module.less
index f81a682e..cdd216f4 100644
--- a/public/css/module.less
+++ b/public/css/module.less
@@ -1694,3 +1694,18 @@ div.exception {
     background: #e99;
 }
 /** END of php-diff **/
+
+.DifferencesInline {
+  tr td:last-child {
+    width: 90%;
+  }
+  tr th:first-child {
+    width: 5%;
+  }
+  tr th:nth-child(2) {
+    width: 5%;
+  }
+  ins, del {
+    text-decoration: none;
+  }
+}