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commonfileutils.pas
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commonfileutils.pas
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unit CommonFileUtils;
{ Common routines to work with files.
Copyright (C) 2018 Mohammadreza Bahrami m.audio91@gmail.com
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version with the following modification:
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules,and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms
and conditions of the license of that module. An independent module is a
module which is not derived from or based on this library. If you modify
this library, you may extend this exception to your version of the library,
but you are not obligated to do so. If you do not wish to do so, delete this
exception statement from your version.
This program 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 Library General Public License
for more details.
You should have received a copy of the GNU Library General Public License
along with this library; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA.
}
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, LazFileUtils, Dialogs;
function GenFileName(const SourceFile: String; const SomeStr: String = '';
const NewExtension: String = ''; IncludePath: Boolean = true;
const NewPath: String = ''; AllowIdentical: Boolean = false): String;
procedure AdjustFileLineBreaks(const F: String);
function TryDirectoryIsWritable(const Dir: String): Boolean;
function OpenFiles(Multi: Boolean = False; const ATitle: String = '';
const AFilters: String = 'All|*'; AFilterIndex: Integer = 0;
AOptions: TOpenOptions = []; const APath: String = ''): TStringArray;
implementation
function GenFileName(const SourceFile: String; const SomeStr: String;
const NewExtension: String; IncludePath: Boolean;
const NewPath: String; AllowIdentical: Boolean): String;
var
SourcePath, SourceExt: String;
begin
Result := SourceFile;
if SourceFile = EmptyStr then Exit;
SourcePath := ExtractFilePath(SourceFile);;
SourceExt := ExtractFileExt(SourceFile);
Result := ExtractFileNameOnly(SourceFile);
if IncludePath then
begin
if NewPath <> EmptyStr then
Result := IncludeTrailingPathDelimiter(NewPath) + Result
else
Result := SourcePath + Result;
end;
Result := Result + SomeStr;
if NewExtension <> EmptyStr then
Result := Result + NewExtension
else
Result := Result + SourceExt;
if not AllowIdentical and (CompareText(Result, SourceFile) = 0) then
raise Exception.Create('Identical names!');
end;
procedure AdjustFileLineBreaks(const F: String);
var
sl: TStringList;
begin
if not FileExists(F) then Exit;
sl := TStringList.Create;
try
sl.LoadFromFile(F);
sl.TextLineBreakStyle := DefaultTextLineBreakStyle;
sl.SaveToFile(F);
finally
if Assigned(sl) then
sl.Free;
end;
end;
function TryDirectoryIsWritable(const Dir: String): Boolean;
var
sl: TStringList;
i: Integer;
begin
try
Result := DirectoryIsWritable(Dir);
Except
Result := false;
end;
{$ifdef unix}
//delete any temp file left
sl := TStringList.Create;
try
FindAllFiles(sl, Dir, 'tstperm*.tmp', False);
if sl.Count > 0 then
for i := sl.Count-1 downto 0 do
DeleteFile(sl.Strings[i]);
finally
sl.Free;
end;
{$endif}
end;
function OpenFiles(Multi: Boolean; const ATitle: String;
const AFilters: String; AFilterIndex: Integer; AOptions: TOpenOptions;
const APath: String): TStringArray;
var
OD: TOpenDialog;
i: Integer;
begin
Result := nil;
OD := TOpenDialog.Create(nil);
try
with OD do
begin
if ATitle <> EmptyStr then
Title := ATitle;
if AFilters <> EmptyStr then
Filter := AFilters;
FilterIndex := AFilterIndex;
Options := Options + [ofFileMustExist,ofNoNetworkButton]
+ AOptions - [ofAllowMultiSelect];
if Multi then
Options := Options + [ofAllowMultiSelect];
if (APath <> EmptyStr)
and DirectoryExists(APath) then
InitialDir := APath;
if Execute then
begin
if Multi then
begin
SetLength(Result, Files.Count);
for i := 0 to Files.Count-1 do
Result[i] := Files[i];
end
else
begin
SetLength(Result, 1);
Result[0] := FileName;
end;
end;
end;
finally
if Assigned(OD) then OD.Free;
end;
end;
end.