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{
***************************************************************************
* *
* This source is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This code is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* A copy of the GNU General Public License is available on the World *
* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
* obtain it by writing to the Free Software Foundation, *
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
***************************************************************************
Author: Mattias Gaertner
Abstract:
Simple demonstrating, how to add a method to a class.
}
program AddMethod;
{$mode objfpc}{$H+}
uses
SysUtils,
// LazUtils
LazFileUtils,
// CodeTools
CodeCache, CodeToolsConfig, CodeToolManager, CodeCompletionTool, SimpleUnit1;
const
ConfigFilename = 'codetools.config';
type
TMyMethodType = function(Sender: TObject; AValue: integer): string of object;
var
Filename: string;
Code: TCodeBuffer;
Tool: TCodeTool;
AClassName: String;
MethodName: String;
MethodDefinition: String;
CleanMethodDefinition: String;
i: Integer;
begin
// Example: find declaration of 'TObject'
// init the codetools
CodeToolBoss.SimpleInit(ConfigFilename);
// load the file
Filename:=AppendPathDelim(GetCurrentDir)+'scanexamples'+PathDelim
+'simpleunit1.pas';
Code:=CodeToolBoss.LoadFile(Filename,false,false);
if Code=nil then
raise Exception.Create('loading failed '+Filename);
// Example 1: add a method compatible to TMyMethodType
if CodeToolBoss.CreatePublishedMethod(Code,'TMyClass','NewMethod',
typeinfo(TMyMethodType),true) then
begin
writeln('Method added: ');
writeln(Code.Source);
end else begin
raise Exception.Create('Adding method failed');
end;
// Example 2: adding methods directly, but several at a time
AClassName:='TMyClass';
if not CodeToolBoss.InitClassCompletion(Code,UpperCase(AClassName),Tool) then
raise Exception.Create('Explore failed');
for i:=1 to 3 do begin
MethodName:='NewProc'+IntToStr(i);
MethodDefinition:='procedure '+MethodName
+'(Sender:TObject; AValue:integer);';
// check, to not add an already existing method.
// Create a search mask: only method names, parameter types and semicolon.
// no class name, no 'procedure' keyword, no comments, no defaults,
// no unneeded spaces, no result type, no parameter names, uppercase,
// no modifiers (e.g. virtual)
CleanMethodDefinition:=UpperCase(MethodName+'(:TObject;:integer);');
if not Tool.ProcExistsInCodeCompleteClass(CleanMethodDefinition) then
Tool.AddClassInsertion(CleanMethodDefinition, MethodDefinition, MethodName,
ncpPublishedProcs);
end;
if not Tool.ApplyClassCompletion(true) then
raise Exception.Create('Explore failed');
writeln('Method added: ');
writeln(Code.Source);
end.
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