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unit SwitchableVisitor;
{ AFS 22 Feb 02
this visitor respects the special comments "//jcf:"
that can turn sertain processes off and on again
}
{(*}
(*------------------------------------------------------------------------------
Delphi Code formatter source code
The Original Code is SwitchableVisitor, released May 2003.
The Initial Developer of the Original Code is Anthony Steele.
Portions created by Anthony Steele are Copyright (C) 1999-2008 Anthony Steele.
All Rights Reserved.
Contributor(s): Anthony Steele.
The contents of this file are subject to the Mozilla Public License Version 1.1
(the "License"). you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.mozilla.org/NPL/
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied.
See the License for the specific language governing rights and limitations
under the License.
Alternatively, the contents of this file may be used under the terms of
the GNU General Public License Version 2 or later (the "GPL")
See http://www.gnu.org/licenses/gpl.html
------------------------------------------------------------------------------*)
{*)}
{$I JcfGlobal.inc}
interface
uses BaseVisitor, FormatFlags;
type
TSwitchableVisitor = class(TBaseTreeNodeVisitor)
private
// is this processs on?
fbEnabled: boolean;
// on/off flags that this processor responds to
feFormatFlags: TFormatFlags;
protected
// enabled state may be changed by this token
procedure CheckEnabled(const pcToken: TObject); virtual;
// every token is inspected, even when the visitor is disabled
procedure InspectSourceToken(const {%H-}pcToken: TObject); virtual;
// this is only called when the processor is enabled
function EnabledVisitSourceToken(const {%H-}pcToken: TObject): Boolean; virtual;
public
constructor Create; override;
function VisitSourceToken(const pcToken: TObject): Boolean; override;
property FormatFlags: TFormatFlags Read feFormatFlags Write feFormatFlags;
end;
implementation
uses SourceToken, Tokens, ParseError;
constructor TSwitchableVisitor.Create;
begin
inherited;
fbEnabled := True;
//by default, format unless all processors are turned off
feFormatFlags := [eAllFormat];
end;
procedure TSwitchableVisitor.CheckEnabled(const pcToken: TObject);
var
lcToken: TSourceToken;
leFlags: TFormatFlags;
lsError: string;
lbHasFlags: boolean;
lbOn: boolean;
begin
lcToken := TSourceToken(pcToken);
if lcToken.TokenType <> ttComment then
exit;
lbHasFlags := ReadCommentJcfFlags(lcToken.SourceCode, lsError, leFlags, lbOn);
if not lbHasFlags then
exit;
if lsError <> '' then
raise TEParseError.Create(lsError, lcToken);
// does this flag affect us?
if (FormatFlags * leFlags) <> [] then
fbEnabled := lbOn;
end;
function TSwitchableVisitor.EnabledVisitSourceToken(const pcToken: TObject): Boolean;
begin
// here for override
Result := False;
end;
procedure TSwitchableVisitor.InspectSourceToken(const pcToken: TObject);
begin
// here for override
end;
function TSwitchableVisitor.VisitSourceToken(const pcToken: TObject): Boolean;
begin
CheckEnabled(pcToken);
InspectSourceToken(pcToken);
if fbEnabled then
Result := EnabledVisitSourceToken(pcToken)
else
Result:= False;
end;
end.
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