From ceb58df19dba18d1e2891adec3755e4cf8db02a5 Mon Sep 17 00:00:00 2001
From: GoZ <goz@226961.no-reply.drupal.org>
Date: Mon, 29 Feb 2016 16:45:57 +0100
Subject: [PATCH] Issue #2678016 by GoZ: Plugin filter process should not
 return string

---
 prism.libraries.yml               |  7 +++++++
 src/Plugin/Filter/PrismFilter.php | 16 +++++++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 prism.libraries.yml

diff --git a/prism.libraries.yml b/prism.libraries.yml
new file mode 100644
index 0000000..bcdfe87
--- /dev/null
+++ b/prism.libraries.yml
@@ -0,0 +1,7 @@
+prism:
+  version: VERSION
+  js:
+    /sites/all/libraries/prism/prism.js: {}
+  css:
+    theme:
+      /sites/all/libraries/prism/prism.css: {}
\ No newline at end of file
diff --git a/src/Plugin/Filter/PrismFilter.php b/src/Plugin/Filter/PrismFilter.php
index b211db3..8edbac4 100644
--- a/src/Plugin/Filter/PrismFilter.php
+++ b/src/Plugin/Filter/PrismFilter.php
@@ -66,7 +66,6 @@ class PrismFilter extends FilterBase implements ContainerFactoryPluginInterface
    * {@inheritdoc}
    */
   public function process($text, $langcode) {
-    $text = new FilterProcessResult($text);
 
     $tags = array();
     if (preg_match_all('/\[prism:([^\|\\]]+)\|?([^\\]]*)?\]/i', $text, $tag_match)) {
@@ -84,11 +83,22 @@ class PrismFilter extends FilterBase implements ContainerFactoryPluginInterface
           }
         }
       }
+      // Replace [prism:%type] by html tags.
+      $text = str_replace($search, $replace, $text);
 
-      return str_replace($search, $replace, $text);
+      $result = new FilterProcessResult($text);
+
+      // Add css and js file when necessary.
+      $result->setAttachments(array(
+        'library' => array(
+          'prism/prism',
+        ),
+      ));
+
+      return $result;
     }
 
-    return $text;
+    return new FilterProcessResult($text);
   }
 
 }
-- 
2.5.4 (Apple Git-61)