diff --git a/editor/SphinxEditorWidget.cpp b/editor/SphinxEditorWidget.cpp
index 984c099..1805d64 100644
--- a/editor/SphinxEditorWidget.cpp
+++ b/editor/SphinxEditorWidget.cpp
@@ -58,9 +58,9 @@ void EditorWidget::onCustomContextMenu(const QPoint &pos)
     menu.addSeparator();
     if (mRightPane) {
         menu.addAction(mShowRightPaneAction);
-    }
-    if (!mRightPane->html().isEnabled()) {
-        menu.addAction(mUrlAction);
+        if (!mRightPane->html().isEnabled()) {
+            menu.addAction(mUrlAction);
+        }
     }
 
     menu.exec(this->mapToGlobal(pos));
@@ -157,8 +157,10 @@ void EditorWidget::connectActions()
 void EditorWidget::onUrlAction()
 {
     onShowRightPane(true);
-    mRightPane->setCurrentTab(RightPaneWidget::PAGE_HTML);
-    mRightPane->html().updateView();
+    if (mRightPane) {
+        mRightPane->setCurrentTab(RightPaneWidget::PAGE_HTML);
+        mRightPane->html().updateView();
+    }
 }
 
 void EditorWidget::onToggleRightPane()
@@ -174,9 +176,8 @@ void EditorWidget::onToggleRightPane()
 
 void EditorWidget::onPreviewHtmlChanged(const QString &html)
 {
-    if (!html.isEmpty() && mRightPane->isVisible()) {
+    if (!html.isEmpty() && mRightPane && mRightPane->isVisible()) {
         onShowRightPane(true);
-        //mRightPane->setCurrentTab(RightPaneWidget::PAGE_PREVIEW);
         mRightPane->setTabEnabled(RightPaneWidget::PAGE_PREVIEW, true);
         mRightPane->preview().setHtml(html);
     }