Simplify to make it work better on edits. This way Scintilla doesnt e…

…xpand sections when editing above them and also it doesnt remove whitespace lines at the end of a collapsed section when the section tag is removed (like by deleting ]). 😏

Components/ScintEdit.pas

@@ -1812,38 +1812,21 @@ procedure TScintEdit.StyleNeeded(const EndPos: Integer);
       Call(SCI_SETSTYLINGEX, Length(FStyler.FStyleStr), LPARAM(PAnsiChar(FStyler.FStyleStr)));
 
       FStyler.FStyleStr := '';
+      FStyler.FText := '';
     end;
 
-    { Set line states and also add fold headers at section tags. These appear
-      with section scNone with the next line not being section sNone. }
-
-    var ExtraFlags := 0;
-    if FStyler.FText = '' then begin
-      { All spanned lines are empty. If only some lines are empty we miss this. }
-      ExtraFlags := ExtraFlags or SC_FOLDLEVELWHITEFLAG;
-    end;
-
-    FStyler.FText := '';
+    { Set line states and also add fold headers when not in a section. }
 
     for var I := FirstLine to LastLine do begin
       var OldState := FLines.GetState(I);
       if FStyler.FLineState <> OldState then
         Call(SCI_SETLINESTATE, I, FStyler.FLineState);
 
       var Section := TInnoSetupStyler.GetSectionFromLineState(FStyler.LineState);
-      if Section <> scNone then begin
-        { We're in a section, make this line as level 1 }
-        Call(SCI_SETFOLDLEVEL, I, SC_FOLDLEVELBASE+1 or ExtraFlags);
-        { Also look at previous line to see if was the section tag, and if so
-          retroactively set it as a folder header }
-        if I > 0 then begin
-          var PrevState := FLines.GetState(I-1);
-          var PrevSection := TInnoSetupStyler.GetSectionFromLineState(PrevState);
-          if PrevSection = scNone then
-            Call(SCI_SETFOLDLEVEL, I-1, SC_FOLDLEVELBASE or SC_FOLDLEVELHEADERFLAG or ExtraFlags);
-        end;
-      end else
-        Call(SCI_SETFOLDLEVEL, I, SC_FOLDLEVELBASE or ExtraFlags);
+      if Section <> scNone then
+        Call(SCI_SETFOLDLEVEL, I, SC_FOLDLEVELBASE+1)
+      else
+        Call(SCI_SETFOLDLEVEL, I, SC_FOLDLEVELBASE or SC_FOLDLEVELHEADERFLAG);
     end;
 
     Result := LastLine;