UnifiedDiffEditor: Move setting folding markers into thread

Change-Id: I4fc6f08039813c08e70a6798f65abcea219558be
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/diffeditor/unifieddiffeditorwidget.cpp

@@ -545,10 +545,6 @@ void UnifiedDiffEditorWidget::showDiff()
                 setTextDocument(doc);
 
                 setReadOnly(true);
-
-                QTextBlock block = document()->firstBlock();
-                for (int b = 0; block.isValid(); block = block.next(), ++b)
-                    setFoldingIndent(block, result.foldingIndent.value(b, 3));
             }
             setSelections(result.selections);
         }
@@ -574,7 +570,7 @@ void UnifiedDiffEditorWidget::showDiff()
             return;
 
         const ShowResult result = {TextDocumentPtr(new TextDocument("DiffEditor.UnifiedDiffEditor")),
-                                   diffData, output.foldingIndent, output.selections};
+                                   diffData, output.selections};
         // No need to store the change history
         result.textDocument->document()->setUndoRedoEnabled(false);
 
@@ -595,6 +591,10 @@ void UnifiedDiffEditorWidget::showDiff()
                 return;
         }
 
+        QTextBlock block = result.textDocument->document()->firstBlock();
+        for (int b = 0; block.isValid(); block = block.next(), ++b)
+            setFoldingIndent(block, output.foldingIndent.value(b, 3));
+
         // If future was canceled, the destructor runs in this thread, so we can't move it
         // to caller's thread. We push it to no thread (make object to have no thread affinity),
         // and later, in the caller's thread, we pull it back to the caller's thread.

src/plugins/diffeditor/unifieddiffeditorwidget.h

@@ -115,7 +115,6 @@ private:
     {
         QSharedPointer<TextEditor::TextDocument> textDocument;
         UnifiedDiffData diffData;
-        QHash<int, int> foldingIndent;
         DiffSelections selections;
     };