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