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89 lines
3.6 KiB
ObjectPascal
89 lines
3.6 KiB
ObjectPascal
{
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***************************************************************************
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* *
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* This source is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This code is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details. *
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* *
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* A copy of the GNU General Public License is available on the World *
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* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
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* obtain it by writing to the Free Software Foundation, *
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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* *
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***************************************************************************
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Author: Mattias Gaertner
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Abstract:
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Demonstrating, how to add a method to a class and extending the uses section.
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}
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program AddClass;
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{$mode objfpc}{$H+}
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uses
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SysUtils, CodeCache, CodeToolManager, BasicCodeTools, SourceChanger, CodeTree;
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var
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Filename: string;
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Code: TCodeBuffer;
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Tool: TCodeTool;
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UsesSection: TCodeTreeNode;
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InsertPos: LongInt;
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Indent: LongInt;
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ClassSrc: String;
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SourceChangeCache: TSourceChangeCache;
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i: Integer;
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begin
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// load the file
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Filename:=ExpandFileName(SetDirSeparators('scanexamples/simpleunit1.pas'));
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Code:=CodeToolBoss.LoadFile(Filename,false,false);
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if Code=nil then
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raise Exception.Create('loading failed '+Filename);
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// Example: add a new class right after the uses section.
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ClassSrc:='type'+LineEnding
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+' TNewClass = class'+LineEnding
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+' end;';
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// parse the unit
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if not CodeToolBoss.Explore(Code,Tool,false,true) then begin
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raise Exception.Create('parser error');
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end;
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SourceChangeCache:=CodeToolBoss.SourceChangeCache;
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// find a nice insert position (behind the uses section)
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UsesSection:=Tool.FindMainUsesSection(false);
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InsertPos:=UsesSection.EndPos;
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// use the same indentation as the start of the uses section
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Indent:=GetLineIndent(Tool.Src,UsesSection.StartPos);
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ClassSrc:=SourceChangeCache.BeautifyCodeOptions.BeautifyStatement(
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ClassSrc,Indent);
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// init the SourceChangeCache
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SourceChangeCache.MainScanner:=Tool.Scanner;
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if not SourceChangeCache.Replace(gtEmptyLine,gtEmptyLine,InsertPos,InsertPos,
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ClassSrc)
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then
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raise Exception.Create('unable to insert there (maybe the InsertPos does not exist?)');
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// write the changed files
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writeln('The following files will be modified:');
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for i:=0 to SourceChangeCache.BuffersToModifyCount-1 do
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writeln(SourceChangeCache.BuffersToModify[i].Filename);
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// modify the files
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if not SourceChangeCache.Apply then
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raise Exception.Create('unable to apply changes (maybe a file is readonly?)');
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// write the new source:
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writeln('-----------------------------------');
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writeln('New source:');
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writeln(Code.Source);
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writeln('-----------------------------------');
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end.
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