From 8ad52f17568b0a769da9e8c319a876cf7befd2d2 Mon Sep 17 00:00:00 2001
From: nightwing <amirjanyan@gmail.com>
Date: Mon, 5 Mar 2018 18:30:32 +0400
Subject: [PATCH 1/2] fix issue with scroll position being reset on tab switch

---
 plugins/c9.ide.ui/lib_apf.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/plugins/c9.ide.ui/lib_apf.js b/plugins/c9.ide.ui/lib_apf.js
index a21f623d..aab4125d 100644
--- a/plugins/c9.ide.ui/lib_apf.js
+++ b/plugins/c9.ide.ui/lib_apf.js
@@ -5541,9 +5541,12 @@ apf.AmlNode = function(){
                     nextNode = nextNode.nextSibling;
                 }
                 
-                amlNode.$pHtmlNode.insertBefore(amlNode.$altExt || amlNode.$ext,
-                    nextNode && (nextNode.$altExt || nextNode.$ext) || null);
+                var htmlNode = amlNode.$altExt || amlNode.$ext;
+                var nextHtmlNode = nextNode && (nextNode.$altExt || nextNode.$ext) || null;
+                if (htmlNode.parentNode != amlNode.$pHtmlNode || amlNode.nextSibling != nextHtmlNode) {
                     
+                    amlNode.$pHtmlNode.insertBefore(htmlNode, nextHtmlNode);
+                }
             }
             
             //Signal node and all it's ancestors

From 8605bafc84a7e9d10a862fe1550ae8bea7ede3da Mon Sep 17 00:00:00 2001
From: nightwing <amirjanyan@gmail.com>
Date: Mon, 5 Mar 2018 20:35:15 +0400
Subject: [PATCH 2/2] fix scrolltop being changed after moving the tab between
 panes

---
 plugins/c9.ide.editors/editor.js     | 1 +
 plugins/c9.ide.editors/texteditor.js | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/plugins/c9.ide.editors/editor.js b/plugins/c9.ide.editors/editor.js
index e063f26b..ea239e6d 100644
--- a/plugins/c9.ide.editors/editor.js
+++ b/plugins/c9.ide.editors/editor.js
@@ -30,6 +30,7 @@ define(function(require, module, exports) {
                 // Old Editor
                 var lastEditor = doc.editor;
                 if (lastEditor && lastEditor != plugin) {
+                    doc.getState();
                     lastEditor.unloadDocument(doc, { 
                         toEditor: plugin, 
                         fromEditor: lastEditor 
diff --git a/plugins/c9.ide.editors/texteditor.js b/plugins/c9.ide.editors/texteditor.js
index bd402ea1..ce92ecda 100644
--- a/plugins/c9.ide.editors/texteditor.js
+++ b/plugins/c9.ide.editors/texteditor.js
@@ -49,13 +49,13 @@ define(function(require, exports, module) {
                 
                 // Value
                 doc.on("getValue", function get(e) { 
-                    return currentDocument == doc 
+                    return currentDocument == doc && editor
                         ? editor.value 
                         : e.value;
                 }, session);
                 
                 doc.on("setValue", function set(e) { 
-                    if (currentDocument == doc)
+                    if (currentDocument == doc && editor)
                         editor.value = e.value || ""; 
                 }, session);