Maintain selection after indenting. Closes #4452

Rubberduck.SmartIndenter/Indenter.cs

@@ -30,6 +30,8 @@ public void IndentCurrentProcedure()
                     return;
                 }
 
+                var initialSelection = GetSelection(pane).Collapse();
+
                 using (var module = pane.CodeModule)
                 {
                     var selection = GetSelection(pane);
@@ -49,8 +51,9 @@ public void IndentCurrentProcedure()
                     using (var component = module.Parent)
                     {
                         Indent(component, selection, true);
-                    }
+                    }                   
                 }
+                ResetSelection(pane, initialSelection);
             }
         }
 
@@ -66,13 +69,17 @@ public void IndentCurrentModule()
                     return;
                 }
 
+                var initialSelection = GetSelection(pane).Collapse();
+
                 using (var module = pane.CodeModule)
                 {
                     using (var component = module.Parent)
                     {
                         Indent(component);
-                    }
-                }                
+                    }                   
+                }
+
+                ResetSelection(pane, initialSelection);
             }
         }
 
@@ -81,14 +88,47 @@ public void IndentCurrentModule()
         /// </summary>
         public void IndentCurrentProject()
         {
-            var project = _vbe.ActiveVBProject;
-            if (project.Protection == ProjectProtection.Locked)
+            using (var pane = _vbe.ActiveCodePane)
+            {
+                var initialSelection = pane == null || pane.IsWrappingNullReference ? default : GetSelection(pane).Collapse();
+
+                var project = _vbe.ActiveVBProject;
+                if (project.Protection == ProjectProtection.Locked)
+                {
+                    return;
+                }
+
+                foreach (var component in project.VBComponents)
+                {
+                    Indent(component);
+                }
+
+                ResetSelection(pane, initialSelection);
+            }
+        }
+
+        private void ResetSelection(ICodePane codePane, Selection initialSelection)
+        {
+            using (var window = _vbe.ActiveWindow)
             {
-                return;
+                if (initialSelection == default || codePane == null || window == null ||
+                    window.IsWrappingNullReference || window.Type != WindowKind.CodeWindow ||
+                    codePane.IsWrappingNullReference)
+                {
+                    return;
+                }
             }
-            foreach (var component in project.VBComponents)
+
+            using (var module = codePane.CodeModule)
             {
-                Indent(component);
+                // This will only "ballpark it" for now - it sets the absolute line in the module, not necessarily
+                // the specific LoC. That will be a TODO when the parse tree is used to indent. For the time being,
+                // maintaining that is ridiculously difficult vis-a-vis the payoff if the vertical spacing is 
+                // changed.
+                var lines = module.CountOfLines;
+                codePane.Selection = lines < initialSelection.StartLine
+                    ? new Selection(lines, initialSelection.StartColumn, lines, initialSelection.StartColumn)
+                    : initialSelection;
             }
         }
 

Rubberduck.VBEEditor/Selection.cs

@@ -33,6 +33,9 @@ public Selection(int startLine, int startColumn, int endLine, int endColumn)
         public Selection ShiftLeft(int positions = 1) =>
             new Selection(StartLine, Math.Max(1, StartColumn - positions), EndLine, Math.Max(1, StartColumn - positions));
 
+        public Selection Collapse() =>
+            new Selection(EndLine, EndColumn, EndLine, EndColumn);
+
         public bool IsEmpty()
         {
             return Equals(Empty);