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------------------------------------------------------------------------------
-- --
-- ASIS Tester And iNTerpreter (ASIStant) COMPONENTS --
-- --
-- A S I S T A N T . B R O W S E R --
-- --
-- B o d y --
-- --
-- Copyright (C) 1997-2012, Free Software Foundation, Inc. --
-- --
-- ASIStant is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 2, or (at your option) any later --
-- version. ASIStant is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MER- --
-- CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General --
-- Public License for more details. You should have received a copy of the --
-- GNU General Public License distributed with GNAT; see file COPYING. If --
-- not, write to the Free Software Foundation, 51 Franklin Street, Fifth --
-- Floor, Boston, MA 02110-1301, USA. --
-- --
-- ASIStant is an evolution of ASIStint tool that was created by Vasiliy --
-- Fofanov as part of a collaboration between Software Engineering --
-- Laboratory of the Swiss Federal Institute of Technology in Lausanne, --
-- Switzerland, and the Scientific Research Computer Center of the Moscow --
-- University, Russia, supported by the Swiss National Science Foundation --
-- grant #7SUPJ048247, "Development of ASIS for GNAT with industry quality" --
-- --
-- ASIStant is distributed as a part of the ASIS implementation for GNAT --
-- (ASIS-for-GNAT) and is maintained by AdaCore (http://www.adacore.com). --
------------------------------------------------------------------------------
with Ada.Text_IO; -- Required for Get_Immediate
with Asis.Elements;
with Asis.Exceptions; use Asis.Exceptions;
with Asis.Errors; use Asis.Errors;
with Asis.Implementation;
with Asis.Extensions.Flat_Kinds; use Asis.Extensions.Flat_Kinds;
with ASIStant.Help; use ASIStant.Help;
with ASIStant.Print; use ASIStant.Print;
with ASIStant.Text_IO; use ASIStant.Text_IO;
with ASIStant.Find_Element;
with ASIStant.Browser.Iterator; use ASIStant.Browser.Iterator;
with ASIStant.FuncEnum, ASIStant.FuncArr;
use ASIStant.FuncEnum, ASIStant.FuncArr;
package body ASIStant.Browser is
------------------------------------------------------------------------------
-- Browser capability for ASIStant
------------------------------------------------------------------------------
Browser_Prompt : constant Wide_String :=
"N=Next,P=Previous,D=Down,U=Up,\=Detail,?=QHelp," &
"Space=Query,G=GotoSLOC,Q=Quit-->";
function Browse (E : Asis.Element) return Asis.Element is
-- Gateway to the Browser capability
Current : Asis.Element := E;
Next : Asis.Element := Asis.Nil_Element;
C : Character;
S : Wide_String (1 .. 50);
N, Line, Col : Natural;
sw : FuncEnum.Switch_Index;
Success : Boolean;
-- Set False if any error occured during interpreting a given comand,
-- Set True otherwise
begin
if Asis.Elements.Is_Nil (E) then
ATIPut_Line ("Browser: Cannot browse from Nil_Element.");
return Asis.Nil_Element;
end if;
Print_Result ((RType => Par_Element, E => Current));
ATINew_Line;
ATIPut_Line (Browser_Prompt);
loop
Success := True;
if not (Asis.Elements.Is_Nil (Next) or else
Asis.Elements.Is_Identical (Current, Next))
then
Current := Next;
ATINew_Line;
Print_Result ((RType => Par_Element, E => Current));
ATINew_Line;
ATIPut_Line (Browser_Prompt);
end if;
Ada.Text_IO.Get_Immediate (C);
case C is
when 'Q' | 'q' =>
ATIPut_Line ("Q:");
return Current;
when 'G' | 'g' =>
begin
ATIPut ("Enter Line position:");
ATIGet (S, N);
Line := Integer'Wide_Value (S (1 .. N - 1));
ATIPut ("Enter Column position:");
ATIGet (S, N);
Col := Integer'Wide_Value (S (1 .. N - 1));
Next := ASIStant.Find_Element
(Asis.Elements.Enclosing_Compilation_Unit (Current),
Line, Col);
Current := Asis.Nil_Element;
exception
when Constraint_Error =>
ATIPut_Line ("Invalid parameter: " & S (1 .. N - 1));
end;
when 'D' | 'd' =>
ATIPut ("Down:");
Next := Down (Current);
when 'U' | 'u' =>
ATIPut ("Up:");
Next := Up (Current);
when 'N' | 'n' =>
ATIPut ("Next:");
Next := Iterator.Next (Current);
when 'P' | 'p' =>
ATIPut ("Previous:");
Next := Previous (Current);
when '\' =>
ATIPut ("PRINT detail: ");
ATIGet (S, N);
Print_Detail (S (1 .. 2));
Next := Current;
Current := Asis.Nil_Element;
when ' ' =>
ATIPut ("Query name: ");
ATIGet (S, N);
begin
sw := FuncEnum.Switch_Index'Wide_Value (S (1 .. N - 1));
Next := FuncArr.FElemRetElem (sw) (Current);
exception
when Constraint_Error =>
Success := False;
ATIPut_Line
("Unknown or illegal query " & S (1 .. N - 1));
when ASIS_Inappropriate_Context |
ASIS_Inappropriate_Container |
ASIS_Inappropriate_Compilation_Unit |
ASIS_Inappropriate_Element |
ASIS_Inappropriate_Line |
ASIS_Inappropriate_Line_Number |
ASIS_Failed =>
Success := False;
ATIPut_Line ("Exception is raised by ASIS query "
& S (1 .. N - 1));
ATIPut_Line ("Status : " &
Asis.Errors.Error_Kinds'Wide_Image
(Asis.Implementation.Status), 5);
ATIPut_Line ("Diagnosis : ", 5);
ATIPut_Line (Asis.Implementation.Diagnosis, 5);
Asis.Implementation.Set_Status;
when others =>
Success := False;
ATIPut_Line ("Unexpected bug in browser");
ATIPut_Line ("Please report to report@adacore.com");
end;
when '?' =>
Display_Kind_Help (Flat_Element_Kind (Current));
Success := False;
when others =>
Success := False;
ATIPut_Line ("Unknown browser command");
end case;
if (Asis.Elements.Is_Nil (Next)) and then Success then
ATIPut_Line (" Cannot go in this direction.");
end if;
end loop;
end Browse;
function Browse (C : Asis.Compilation_Unit) return Asis.Element is
-- Gateway to the Browser capability for Compilation_Units
begin
return Browse (Asis.Elements.Unit_Declaration (C));
end Browse;
end ASIStant.Browser;
|
