mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-11-04 03:19:55 +01:00
89 lines
3.6 KiB
ObjectPascal
89 lines
3.6 KiB
ObjectPascal
{
|
|
***************************************************************************
|
|
* *
|
|
* 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:
|
|
Demonstrating, how to add a method to a class and extending the uses section.
|
|
}
|
|
program AddClass;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
uses
|
|
SysUtils, CodeCache, CodeToolManager, BasicCodeTools, SourceChanger, CodeTree;
|
|
|
|
var
|
|
Filename: string;
|
|
Code: TCodeBuffer;
|
|
Tool: TCodeTool;
|
|
UsesSection: TCodeTreeNode;
|
|
InsertPos: LongInt;
|
|
Indent: LongInt;
|
|
ClassSrc: String;
|
|
SourceChangeCache: TSourceChangeCache;
|
|
i: Integer;
|
|
begin
|
|
// load the file
|
|
Filename:=ExpandFileName(SetDirSeparators('scanexamples/simpleunit1.pas'));
|
|
Code:=CodeToolBoss.LoadFile(Filename,false,false);
|
|
if Code=nil then
|
|
raise Exception.Create('loading failed '+Filename);
|
|
|
|
// Example: add a new class right after the uses section.
|
|
ClassSrc:='type'+LineEnding
|
|
+' TNewClass = class'+LineEnding
|
|
+' end;';
|
|
// parse the unit
|
|
if not CodeToolBoss.Explore(Code,Tool,false,true) then begin
|
|
raise Exception.Create('parser error');
|
|
end;
|
|
SourceChangeCache:=CodeToolBoss.SourceChangeCache;
|
|
// find a nice insert position (behind the uses section)
|
|
UsesSection:=Tool.FindMainUsesSection(false);
|
|
InsertPos:=UsesSection.EndPos;
|
|
// use the same indentation as the start of the uses section
|
|
Indent:=GetLineIndent(Tool.Src,UsesSection.StartPos);
|
|
ClassSrc:=SourceChangeCache.BeautifyCodeOptions.BeautifyStatement(
|
|
ClassSrc,Indent);
|
|
// init the SourceChangeCache
|
|
SourceChangeCache.MainScanner:=Tool.Scanner;
|
|
if not SourceChangeCache.Replace(gtEmptyLine,gtEmptyLine,InsertPos,InsertPos,
|
|
ClassSrc)
|
|
then
|
|
raise Exception.Create('unable to insert there (maybe the InsertPos does not exist?)');
|
|
|
|
// write the changed files
|
|
writeln('The following files will be modified:');
|
|
for i:=0 to SourceChangeCache.BuffersToModifyCount-1 do
|
|
writeln(SourceChangeCache.BuffersToModify[i].Filename);
|
|
|
|
// modify the files
|
|
if not SourceChangeCache.Apply then
|
|
raise Exception.Create('unable to apply changes (maybe a file is readonly?)');
|
|
|
|
// write the new source:
|
|
writeln('-----------------------------------');
|
|
writeln('New source:');
|
|
writeln(Code.Source);
|
|
writeln('-----------------------------------');
|
|
end.
|
|
|