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{(*}
(*------------------------------------------------------------------------------
Delphi Code formatter source code
The Original Code is CodeWriter.pas, released April 2000.
The Initial Developer of the Original Code is Anthony Steele.
Portions created by Anthony Steele are Copyright (C) 1999-2000 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
------------------------------------------------------------------------------*)
{*)}
unit CodeWriter;
{ AFS 28 November 1999
Writer - final output stage of code formattter
AFS 22 July 2K - optimised by using a string to store tokens,
and writing the file all at once at the end
This is best in the usual-case scenario of a file < 10k
AFS 8 Jan 2K
divided into TCodeWriter and TFileWriter, so that another subclass, TIDEWriter,
can be made with the same interface for the IDW pluggin
Now called TCodeWriter not TWriter to avoid a name clash with Classes.Writer
}
{$I JcfGlobal.inc}
interface
uses SourceToken, ParseTreeNode;
type
TCodeWriter = class(TObject)
private
fiTokensWritten: integer;
{ properties }
fcRoot: TParseTreeNode;
{ worker procs }
procedure WriteTree(const pcRoot: TParseTreeNode);
protected
{ working vars }
fbBOF: boolean;
fsDestText: string;
// common to both
procedure BeforeWrite;
procedure WriteOut(const st: string); overload;
procedure WriteOut(const pt: TSourceToken); overload;
public
constructor Create; virtual;
destructor Destroy; override;
procedure Clear;
procedure Close; virtual;
procedure WriteAll;
property Root: TParseTreeNode Read fcRoot Write fcRoot;
property BOF: boolean Read fbBOF;
end;
implementation
const
MAX_TOKENS = 100000;
{ TCodeWriter }
constructor TCodeWriter.Create;
begin
inherited;
fbBOF := True;
fcRoot := nil;
end;
destructor TCodeWriter.Destroy;
begin
Close;
inherited;
end;
procedure TCodeWriter.WriteOut(const st: string);
begin
//Assert(st <> #0);
if (st = '') or (st = #0) then
exit;
fsDestText := fsDestText + st;
fbBOF := False;
end;
procedure TCodeWriter.WriteOut(const pt: TSourceToken);
begin
WriteOut(pt.SourceCode);
Inc(fiTokensWritten);
end;
procedure TCodeWriter.Close;
begin
Assert(False, ClassName + ' must override TCodeWriter.Close');
end;
procedure TCodeWriter.Clear;
begin
fsDestText := '';
end;
procedure TCodeWriter.BeforeWrite;
begin
end;
procedure TCodeWriter.WriteAll;
begin
Assert(Root <> nil);
WriteTree(Root);
end;
procedure TCodeWriter.WriteTree(const pcRoot: TParseTreeNode);
var
liLoop: integer;
begin
Assert(pcRoot <> nil);
// is it a leaf with source?
if (pcRoot is TSourceToken) then
begin
WriteOut(pcRoot as TSourceToken);
end
else
begin
// write out all child nodes
for liLoop := 0 to pcRoot.ChildNodeCount - 1 do
begin
WriteTree(pcRoot.ChildNodes[liLoop])
end;
end;
end;
end.
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