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https://gitlab.com/freepascal.org/lazarus/lazarus.git
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123 lines
4.3 KiB
ObjectPascal
123 lines
4.3 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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Simple demonstrating, how to setup the codetools, FPC and Lazarus Source
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directory to find a declaration.
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}
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program FindDeclaration;
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{$mode objfpc}{$H+}
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uses
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Classes, SysUtils, CodeCache, CodeToolManager, DefineTemplates, FileProcs,
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CodeToolsConfig, SimpleUnit1;
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const
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ConfigFilename = 'codetools.config';
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var
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Options: TCodeToolsOptions;
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NewCode: TCodeBuffer;
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NewX, NewY, NewTopLine: integer;
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Code: TCodeBuffer;
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X: Integer;
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Y: Integer;
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Filename: String;
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Line: String;
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begin
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if (ParamCount>=1) and (Paramcount<3) then begin
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writeln('Usage:');
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writeln(' ',ParamStr(0));
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writeln(' ',ParamStr(0),' <filename> <X> <Y>');
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end;
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// setup the Options
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Options:=TCodeToolsOptions.Create;
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try
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// setup your paths
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writeln('Config=',ConfigFilename);
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if FileExists(ConfigFilename) then begin
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// To not parse the FPC sources every time, the options are saved to a file.
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Options.LoadFromFile(ConfigFilename);
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end;
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Options.InitWithEnvironmentVariables;
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if Options.FPCSrcDir='' then
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Options.FPCSrcDir:=ExpandFileName('~/freepascal/fpc');
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if Options.LazarusSrcDir='' then
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Options.LazarusSrcDir:=ExpandFileName('~/pascal/lazarus');
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// optional: ProjectDir and TestPascalFile exists only to easily test some
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// things.
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Options.ProjectDir:=SetDirSeparators(GetCurrentDir+'/scanexamples/');
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Filename:=Options.ProjectDir+'simpleunit1.pas';
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// init the codetools
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if not Options.UnitLinkListValid then
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writeln('Scanning FPC sources may take a while ...');
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CodeToolBoss.Init(Options);
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// save the options and the FPC unit links results.
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Options.SaveToFile(ConfigFilename);
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// Example: find declaration of 'TObject'
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X:=5;
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Y:=43;
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writeln('FPCDIR=',Options.FPCSrcDir);
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writeln('PP=',Options.FPCPath);
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writeln('LAZARUSDIR=',Options.LazarusSrcDir);
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writeln('FPCTARGET=',Options.TargetOS);
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writeln('FPCTARGETCPU=',Options.TargetProcessor);
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if (ParamCount>=3) then begin
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Filename:=CleanAndExpandFilename(ParamStr(1));
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X:=StrToInt(ParamStr(2));
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Y:=StrToInt(ParamStr(3));
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writeln('File: ',Filename,' Line=',Y,' Column=',X);
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end;
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// Step 1: load the file
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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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Line:=Code.GetLine(Y-1);
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writeln('Line ',Y,': ',copy(Line,1,X-1),'|',copy(Line,X,length(Line)));
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// Step 2: find declaration
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if CodeToolBoss.FindDeclaration(Code,X,Y,NewCode,NewX,NewY,NewTopLine) then
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begin
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writeln('Declaration found: ',NewCode.Filename,' Line=',NewY,' Column=',NewX);
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end else begin
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if CodeToolBoss.ErrorMessage<>'' then
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writeln('Parse error: ',CodeToolBoss.ErrorMessage)
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else
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writeln('Declaration not found');
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end;
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except
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on E: Exception do begin
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writeln('Error: ',E.Message);
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end;
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end;
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Options.Free;
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end.
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