IDE Window: Extract Procedure/es

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Resumen: "Extraer Procedimiento" toma las sentencias pascal seleccionadas y crea un nuevo procedimiento o método con ese código. Esta utilidad takes some selected pascal statements and creates a new procedure/method from this code. Esta herramienta es útil para dividir procedimientos muy grandes, o para crear fácilmente un nuevo procedimiento a partir de algo de código.

Ejemplo básico: <delphi> procedure DoSomething;

begin
  CallSomething;
end;</delphi>

Select the line "CallSomething;" and do Extract Proc. A dialog pop ups and you can select the type and name of the procedure to create. For example: procedure, "NewProc". Result:

<pascal>

procedure NewProc;
begin
  CallSomething;
end;

procedure DoSomething;
begin
  NewProc;
end;

</pascal>

You can see, that the new procedure "NewProc" was created with the selection as body and the old code was replaced by a call.

Local Variables and Parameters:
"Extract Proc" scans for used variables and automatically creates the parameter list and local variables. Example:

<pascal>

procedure TForm1.DoSomething(var Erni, Bert: integer);
var
  i: Integer; // Comment
begin
  Erni:=Erni+Bert;
  for i:=Erni to 5 do begin
  |
  end;
end;

</pascal>

Select the for loop and create a new Procedure "NewProc". The local variable i is only used in the selection, so it will be moved to the new procedure. Erni is also used in the remaining code, so it will become a parameter.

Result:

<pascal>

procedure NewProc(const Erni: integer);
var
  i: Integer; // Comment
begin
  for i:=Erni to 5 do begin
  |
  end;
end;

procedure TForm1.DoSomething(var Erni, Bert: integer);
begin
  Erni:=Erni+Bert;
  NewProc(Erni);
end;

</pascal>

You can see "i" was moved to the new procedure (Note: including its comment) and Erni.

Limitations:
Pascal is a very powerful language, so don't expect it will work with every code. Current limits/ToDos:

• check if selection bounds on statement bounds
• "with" statements