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PortCopyMain.pas
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PortCopyMain.pas
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(* Copy files from portable device
================================
Destination: local drive
© Dr. J. Rathlev, D-24222 Schwentinental
The contents of this file may be used under the terms of the
Mozilla Public License ("MPL") or
GNU Lesser General Public License Version 2 or later (the "LGPL")
Software distributed under this License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
the specific language governing rights and limitations under the License.
J. Rathlev, June 2022
last modified: February 2024
*)
unit PortCopyMain;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls, Vcl.StdCtrls, Vcl.ExtCtrls,
IStreamApi, FileUtils, PortableDeviceApi, PortableDeviceUtils;
type
TMainForm = class(TForm)
lbDevices: TListBox;
gbDevice: TGroupBox;
Label1: TLabel;
Label2: TLabel;
laManu: TLabel;
laDesc: TLabel;
Label4: TLabel;
laPower: TLabel;
Label7: TLabel;
laType: TLabel;
Label8: TLabel;
laFirmware: TLabel;
btnUpdate: TButton;
tvObjects: TTreeView;
lvFiles: TListView;
btnCopy: TButton;
laPath: TLabel;
paCopy: TPanel;
Label3: TLabel;
FolderDialog: TFileOpenDialog;
Label5: TLabel;
Label6: TLabel;
btnShowDirs: TButton;
laStatus: TLabel;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormShow(Sender: TObject);
procedure lbDevicesClick(Sender: TObject);
procedure tvObjectsClick(Sender: TObject);
procedure tvObjectsExpanding(Sender: TObject; Node: TTreeNode;
var AllowExpansion: Boolean);
procedure lvFilesClick(Sender: TObject);
procedure btnCopyClick(Sender: TObject);
procedure btnUpdateClick(Sender: TObject);
procedure FormResize(Sender: TObject);
private
{ Private-Deklarationen }
DevManager : TPortableDeviceManager;
Device : TPortableDevice;
procedure ReloadDeviceList;
procedure ShowDeviceProps;
procedure RefreshStatus(Index : integer; AObjectID : string);
procedure BuildFileList (AIndex : integer);
procedure AddTreeLevel (node : TTreeNode; AParent : TPortableDeviceObject);
procedure BuildTree;
public
{ Public-Deklarationen }
end;
var
MainForm: TMainForm;
implementation
{$R *.dfm}
uses Vcl.FileCtrl, System.RTLConsts, ExtFileUtils;
{ ---------------------------------------------------------------- }
const
sBytes = 'B';
sKiBytes = 'KiB'; // 1024 byte
sMiBytes = 'MiB'; // 1024*1024 byte
sGiBytes = 'GiB'; // 1024*1024*1024 byte
sKBytes = 'kB'; // 1000 byte
sMBytes = 'MB'; // 1000*1000 byte
sGBytes = 'GB'; // 1000*1000*1000 byte
sGetBytePrefixes = 'KMGT';
Suffixes : array[boolean,1..3] of string =
((sKiBytes,sMiBytes,sGiBytes),(sKBytes,sMBytes,sGBytes));
// Convert number of bytes to string using prefixes from IEC 1996
// DecSep : replace character from system default
// Decimal : use 1000 as divisor instead of 1024
// NoZeroDecimals : do not show zero fractions
function SizeToStr (Bytes : int64; Decimal : boolean = false;
NoZeroDecimals : boolean = false; DecSep : char = #0) : string;
var
v : extended;
n,d : integer;
fs: TFormatSettings;
function ZeroFrac (val : extended; Dec : integer) : boolean;
const
FVal : array [1..2] of extended = (0.1,0.01);
begin
if Dec<1 then Result:=true
else if Dec>2 then Result:=false
else Result:=abs(val-round(val))<FVal[Dec];
end;
begin
if Decimal then d:=1000 else d:=1024;
if Bytes<d then Result:=IntToStr(Bytes)+' '+sBytes // bytes
else begin
fs:=FormatSettings;
if DecSep<>#0 then fs.DecimalSeparator:=DecSep;
v:=Bytes/d;
if v<d then begin
if v<10 then n:=2 else if v<100 then n:=1 else n:=0;
if NoZeroDecimals and ZeroFrac(v,n) then n:=0;
Result:=Format('%.'+IntToStr(n)+'f ',[v],fs)+Suffixes[Decimal,1]; // Kibibyte/kilobyte
end
else begin
v:=v/d;
if v<d then begin
if v<10 then n:=2 else if v<100 then n:=1 else n:=0;
if NoZeroDecimals and ZeroFrac(v,n) then n:=0;
Result:=Format('%.'+IntToStr(n)+'f ',[v],fs)+Suffixes[Decimal,2]// Mebibyte/Megabyte
end
else begin
if NoZeroDecimals and ZeroFrac(v,2) then n:=0 else n:=2;
Result:=Format('%.'+IntToStr(n)+'f ',[v/d],fs)+Suffixes[Decimal,3]; // Gibibyte/Gigabyte
end
end;
end;
end;
function SystemErrorMessage(ASysError : cardinal) : string;
begin
Result:=SysErrorMessage(ASysError);
if length(Result)>0 then Result:=Result+Format(' (0x%.8x)',[ASysError])
else Result:=Format(' 0x%.8x',[ASysError]);
end;
{ ---------------------------------------------------------------- }
procedure TMainForm.FormCreate(Sender: TObject);
begin
DevManager:=TPortableDeviceManager.Create;
FolderDialog.DefaultFolder:=ExtractFilePath(Application.ExeName);
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
DevManager.Free;
end;
procedure TMainForm.FormResize(Sender: TObject);
begin
with lvFiles do begin
Column[1].Width:=120;
Column[2].Width:=70;
Column[0].Width:=Width-215;
end;
end;
procedure TMainForm.FormShow(Sender: TObject);
begin
ReloadDeviceList;
end;
procedure TMainForm.ReloadDeviceList;
var
i : integer;
begin
lbDevices.Clear;
with DevManager do begin
Refresh;
for i:=0 to DeviceCount-1 do lbDevices.AddItem(Devices[i].DeviceName,nil);
end;
lbDevices.ItemIndex:=0;
Device:=DevManager.Devices[lbDevices.ItemIndex];
ShowDeviceProps;
btnCopy.Enabled:=false;
paCopy.Visible:=false;
end;
procedure TMainForm.ShowDeviceProps;
begin
if assigned(Device) then with Device do begin
gbDevice.Caption:=DeviceName;
laManu.Caption:=Manufacturer;
laType.Caption:=DeviceTypeAsString;
laDesc.Caption:=Description;
laPower.Caption:=PowerSourceAsString+' ('+IntTostr(PowerLevel)+'%)';
laFirmware.Caption:=Firmware;
end;
end;
procedure TMainForm.BuildFileList (AIndex : integer);
var
i : integer;
pdo : TPortableDeviceObject;
begin
Screen.Cursor:=crHourGlass;
with lvFiles.Items do begin
Clear;
BeginUpdate;
end;
with Device.Content.Objects[AIndex] do begin
for i:=0 to ChildCount-1 do begin
pdo:=Children[i];
if assigned(pdo) and (pdo.ObjectType=otFile) then begin
with lvFiles.Items.Add do with pdo do begin
Caption:=OriginalName;
if length(Caption)=0 then Caption:=ExtractFilename(ObjectID);
SubItems.Add(DateTimeToStr(LastWriteTime));
SubItems.Add(SizeToStr(Size));
Data:=pointer(pdo.Index);
end;
end;
end;
end;
lvFiles.Items.EndUpdate;
Screen.Cursor:=crDefault;
end;
procedure TMainForm.AddTreeLevel (node : TTreeNode; AParent : TPortableDeviceObject);
var
pdo : TPortableDeviceObject;
nc : TTreeNode;
i : integer;
sn : string;
begin
with AParent do for i:=0 to ChildCount-1 do begin
pdo:=Children[i];
if assigned(pdo) and (pdo.ObjectType in [otRoot,otFolder]) then begin
sn:=pdo.DisplayName;
nc:=tvObjects.Items.AddChild(node,sn);
nc.Data:=pointer(pdo.Index);
tvObjects.Items.AddChild(nc,'');
end;
end;
end;
procedure TMainForm.RefreshStatus(Index : integer; AObjectID : string);
begin
if Index mod 10 = 0 then begin
laStatus.Caption:=Format('%u objects found',[Index]);
Application.ProcessMessages;
end;
end;
procedure TMainForm.BuildTree;
var
node : TTreeNode;
pdo : TPortableDeviceObject;
sn : string;
begin
Screen.Cursor:=crHourGlass;
with tvObjects.Items do begin
Clear;
BeginUpdate;
end;
with Device.Content do begin
Refresh(RefreshStatus);
with ErrorObjects do if Count>0 then begin
sn:=Format('Error on object "%s": %s',[Strings[0],SystemErrorMessage(ErrorCode[0])]);
if Count>1 then sn:=sn+sLineBreak+Format('... &u more errors',[Count-1]);
MessageDlg(sn,mtError,[mbClose],0);
end;
pdo:=DeviceObject;
if assigned(pdo) then begin
sn:=pdo.DisplayName;
node:=tvObjects.Items.Add(nil,sn);
AddTreeLevel(node,pdo);
node.Expand(false);
end;
laStatus.Caption:=Format('%u objects found',[ObjectCount]);
end;
tvObjects.Items.EndUpdate;
Screen.Cursor:=crDefault;
end;
procedure TMainForm.btnUpdateClick(Sender: TObject);
begin
ReloadDeviceList;
end;
procedure TMainForm.lbDevicesClick(Sender: TObject);
begin
Device:=DevManager.Devices[lbDevices.ItemIndex];
ShowDeviceProps;
btnCopy.Enabled:=false;
paCopy.Visible:=false;
BuildTree;
end;
procedure TMainForm.tvObjectsClick(Sender: TObject);
var
node : TTreeNode;
begin
node:=tvObjects.Selected;
if node<>nil then begin
BuildFileList(integer(node.Data));
end;
btnCopy.Enabled:=false;
paCopy.Visible:=false;
end;
procedure TMainForm.tvObjectsExpanding(Sender: TObject; Node: TTreeNode;
var AllowExpansion: Boolean);
var
ndx : integer;
begin
with tvObjects,Items do begin
BeginUpdate;
node.DeleteChildren;
ndx:=integer(node.Data);
AddTreeLevel(node,Device.Content.Objects[ndx]);
EndUpdate;
end;
end;
procedure TMainForm.lvFilesClick(Sender: TObject);
var
n : integer;
SelObject : TPortableDeviceObject;
begin
n:=integer(lvFiles.Selected.Data);
SelObject:=Device.Content.Objects[n];
btnCopy.Enabled:=SelObject.ObjectType=otFile;
end;
{ ------------------------------------------------------------------- }
// copy file
const
defBufferSize = 512*1024; // default buffer size for copy operations
procedure CopyPortableFile (const ASource : TFileData; const ADestName : string);
var
sDest : TFileStream;
FBuffer : array of byte;
NRead,NWrite,bs : cardinal;
sLen : int64;
ec : integer;
hr : HResult;
begin
sDest:=TFileStream.Create(ADestName,fmCreate);
with ASource do begin
bs:=StreamData.BufferSize;
if bs=0 then bs:=defBufferSize;
SetLength(FBuffer,bs); sLen:=FileSize;
repeat
hr:=StreamData.FileStream.Read(FBuffer[0],bs,NRead);
if failed(hr) then begin
sDest.Free;
raise EReadError.CreateRes(@SReadError);
end;
NWrite:=sDest.Write(FBuffer[0],NRead);
if NWrite<NRead then begin
sDest.Free;
raise EWriteError.CreateRes(@SWriteError);
end;
dec(sLen,NRead);
until (sLen<=0);
try ASource.StreamData.FileStream.Commit(0); except end;
FBuffer:=nil;
end;
try sDest.Free; except; end;
ec:=SetFileTimestamps(ADestName,ASource.TimeStamps,false);
if ec<>NO_ERROR then
raise EWriteError.Create(SystemErrorMessage(ec));
end;
procedure TMainForm.btnCopyClick(Sender: TObject);
var
i,n : integer;
PDObject : TPortableDeviceObject;
Dest,sd : string;
FileData : TFileData;
begin
with FolderDialog do if Execute then begin
Dest:=Filename;
paCopy.Visible:=true;
with lvFiles do for i:=0 to Items.Count-1 do with Items[i] do if Selected then begin
n:=integer(Data);
PDObject:=Device.Content.Objects[n];
with PDObject do begin
with laPath do Caption:=MinimizeName(OriginalName,Canvas,paCopy.Width-2*Left);
sd:=IncludeTrailingPathDelimiter(Dest)+ExtractFilename(OriginalName);
GetFileData(FileData,true);
end;
try
CopyPortableFile(FileData,sd);
except
on E:Exception do ShowMessage('Error: '+E.Message);
end;
Application.ProcessMessages;
sleep(1000);
end;
end;
paCopy.Visible:=false;
end;
end.