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ARVIDAVT.PAS
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{/////////////////////////////////////////////////////////////////////////
//
// Dos Navigator Open Source 1.51.08
// Based on Dos Navigator (C) 1991-99 RIT Research Labs
//
// This programs is free for commercial and non-commercial use as long as
// the following conditions are aheared to.
//
// Copyright remains RIT Research Labs, and as such any Copyright notices
// in the code are not to be removed. If this package is used in a
// product, RIT Research Labs should be given attribution as the RIT Research
// Labs of the parts of the library used. This can be in the form of a textual
// message at program startup or in documentation (online or textual)
// provided with the package.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. All advertising materials mentioning features or use of this software
// must display the following acknowledgement:
// "Based on Dos Navigator by RIT Research Labs."
//
// THIS SOFTWARE IS PROVIDED BY RIT RESEARCH LABS "AS IS" AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The licence and distribution terms for any publically available
// version or derivative of this code cannot be changed. i.e. this code
// cannot simply be copied and put under another distribution licence
// (including the GNU Public Licence).
//
//////////////////////////////////////////////////////////////////////////}
{$I STDEFINE.INC}
unit ArvidAvt;
interface
uses
Arvid, Objects2, Streams, Messages, DNApp, Commands, Collect,
Views, Drivers, Startup, U_KeyMap, Advance, Lfn, Files, Dos, Tree,
FilesCol, Advance2, Drives, FlPanel, Memory
, Defines
;
function AvtCMP(S1, S2: String): Integer;
function AvtCellText(Offset: LongInt; var S: TStream): String;
function AvtCellName(const C: TAvtFileCell; var AStream: TStream): String;
function AvtCellDesc(const C: TAvtFileCell; var AStream: TStream): String;
function AvtGetCell(AvtDr: PArvidDrive): LongInt;
procedure AvtFreeCell(AvtDr: PArvidDrive; const l: LongInt);
function AvtCellRotateLeft(AvtDr: PArvidDrive; Loc: LongInt): LongInt;
function AvtCellRotateRight(AvtDr: PArvidDrive; Loc: LongInt): LongInt;
{procedure AvtCheckTree(AvtDr:PArvidDrive);}
function AvtDelFile(AvtDr: PArvidDrive; AName: String): Boolean;
function AvtNewFile(AvtDr: PArvidDrive;
AName: String;
ADescription: String;
AIsDir: Boolean;
AChildOrSize: LongInt;
ATime: LongInt;
AStartSector: LongInt;
AAttr: Word): Word;
procedure AvtSeekDirectory(AvtDr: PArvidDrive);
procedure AvtGetDirectory(AvtDr: PArvidDrive; var ALocation: LongInt;
var FC: PFilesCollection; const FileMask: String);
function CopyFilesToArvid(const S: String; Files: PCollection;
MoveMode: Boolean; Owner: Pointer): Boolean;
procedure AvtCopyFilesInto(AvtDr: PArvidDrive; AFiles: PCollection;
Own: PView; MoveMode: Boolean);
procedure AvtEraseFiles(AvtDr: PArvidDrive; AFiles: PCollection);
procedure AvtMakeDir(AvtDr: PArvidDrive);
procedure AvtEditDescription(AvtDr: PArvidDrive; var S, Nam: String);
procedure AvtCalcTotal(AvtDr: PArvidDrive; const Offset: LongInt;
var LL: TSize);
function AvtInit(AvtDr: PArvidDrive): Boolean;
implementation
uses
PDSetup, Advance1
;
var
FCtemp, FCLtemp, FCRtemp: TAvtFileCell;
ArvidDeleteAllFiles: Boolean;
function AvtCMP(S1, S2: String): Integer;
begin
UpStr(S1);
UpStr(S2);
if S1 = S2 then
AvtCMP := 0
else if S1 < S2 then
AvtCMP := -1
else
AvtCMP := 1;
end;
function AvtCellText(Offset: LongInt; var S: TStream): String;
var
T: TAvtTextCell;
S1: String;
begin
S1 := '';
while Offset <> 0 do
begin
S.Seek(Offset);
S.Read(T, SizeOf(T));
if S.Status <> stOK then
Break;
S1 := S1+Copy(T.Data, 1, 36);
Offset := T.NextTextCell;
end;
AvtCellText := S1;
end;
function AvtCellName(const C: TAvtFileCell; var AStream: TStream): String;
var
S: String;
begin
case C.Flags and AvtCellFormat of
avtCell0:
S := Copy(C.Name0, 1, 16);
avtCell1:
S := Copy(C.Name1, 1, 12);
avtCell2:
S := Copy(C.Name2, 1, 12);
avtCell3:
S := AvtCellText(C.NamePtr, AStream);
end {case};
while (Length(S) <> 0) and (S[Length(S)] = #0) do
SetLength(S, Length(S)-1);
AvtCellName := S;
end;
function AvtCellDesc(const C: TAvtFileCell; var AStream: TStream): String;
var
S: String;
begin
case C.Flags and AvtCellFormat of
avtCell2:
S := AvtCellText(C.DescPtr2, AStream);
avtCell3:
S := AvtCellText(C.DescPtr3, AStream);
else {case}
S := '' {avtCell0,avtCell1};
end {case};
while (Length(S) <> 0) and (S[Length(S)] = #0) do
SetLength(S, Length(S)-1);
AvtCellDesc := S;
end;
function AvtGetCell(AvtDr: PArvidDrive): LongInt;
var
T: TAvtTextCell;
M: TAvtMediaCell;
B: PChar;
begin
with AvtDr^ do
begin
if AVT.FreeCell = 0 then
begin
AvtGetCell := AVT.AfterLastCell;
Inc(AVT.AfterLastCell, SizeOf(T));
if (PosTableOfs <> 0) and (AVT.AfterLastCell >= PosTableOfs) then
begin
Stream^.Seek(AVT.AvtMediaCell);
Stream^.Read(M, SizeOf(M));
GetMem(B, M.PositionTableSize);
Stream^.Seek(PosTableOfs);
Stream^.Read(B^, M.PositionTableSize);
Inc(PosTableOfs, 512);
M.PositionTable := PosTableOfs;
Stream^.Seek(PosTableOfs);
Stream^.Write(B^, M.PositionTableSize);
FreeMem(B, M.PositionTableSize);
Stream^.Seek(AVT.AvtMediaCell);
Stream^.Write(M, SizeOf(M));
end;
end
else
begin
AvtGetCell := AVT.FreeCell;
Stream^.Seek(AVT.FreeCell);
Stream^.Read(T, SizeOf(T));
AVT.FreeCell := T.NextTextCell;
end;
end
end { AvtGetCell };
procedure AvtFreeCell(AvtDr: PArvidDrive; const l: LongInt);
var
T: TAvtTextCell;
begin
with AvtDr^ do
begin
if l = 0 then
Exit;
T.NextTextCell := AVT.FreeCell;
Stream^.Seek(l);
Stream^.Write(T, SizeOf(T));
AVT.FreeCell := l;
end
end;
function AvtCellRotateLeft(AvtDr: PArvidDrive; Loc: LongInt): LongInt;
var
Right: LongInt;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FCtemp, SizeOf(FCtemp));
Stream^.Seek(FCtemp.RightFileCell);
Stream^.Read(FCRtemp, SizeOf(FCRtemp));
if (FCRtemp.Flags and avtBalance) = $00000300 then
begin
Right := AvtCellRotateRight(AvtDr, FCtemp.RightFileCell);
Stream^.Seek(Loc);
Stream^.Read(FCtemp, SizeOf(FCtemp));
FCtemp.RightFileCell := Right;
Stream^.Seek(FCtemp.RightFileCell);
Stream^.Read(FCRtemp, SizeOf(FCRtemp));
end;
Right := FCtemp.RightFileCell;
FCtemp.RightFileCell := FCRtemp.LeftFileCell;
FCRtemp.LeftFileCell := Loc;
if FCRtemp.Flags and avtBalance = 0
then
FCtemp.Flags := (FCtemp.Flags and (not avtBalance))
{or $00000000}
else
FCtemp.Flags := (FCtemp.Flags and (not avtBalance)) or $00000300;
FCRtemp.Flags := (FCRtemp.Flags and (not avtBalance)) or $00000300;
Stream^.Seek(Loc);
Stream^.Write(FCtemp, SizeOf(FCtemp));
Stream^.Seek(Right);
Stream^.Write(FCRtemp, SizeOf(FCRtemp));
AvtCellRotateLeft := Right;
end
end { AvtCellRotateLeft };
function AvtCellRotateRight(AvtDr: PArvidDrive; Loc: LongInt): LongInt;
var
Left: LongInt;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FCtemp, SizeOf(FCtemp));
Stream^.Seek(FCtemp.LeftFileCell);
Stream^.Read(FCLtemp, SizeOf(FCLtemp));
if (FCLtemp.Flags and avtBalance) = $00000100 then
begin
Left := AvtCellRotateLeft(AvtDr, FCtemp.LeftFileCell);
Stream^.Seek(Loc);
Stream^.Read(FCtemp, SizeOf(FCtemp));
FCtemp.LeftFileCell := Left;
Stream^.Seek(FCtemp.LeftFileCell);
Stream^.Read(FCLtemp, SizeOf(FCLtemp));
end;
Left := FCtemp.LeftFileCell;
FCtemp.LeftFileCell := FCLtemp.RightFileCell;
FCLtemp.RightFileCell := Loc;
if (FCLtemp.Flags and avtBalance) = 0
then
FCtemp.Flags := (FCtemp.Flags and (not avtBalance))
{or $00000000}
else
FCtemp.Flags := (FCtemp.Flags and (not avtBalance)) or $00000100;
FCLtemp.Flags := (FCLtemp.Flags and (not avtBalance)) or $00000100;
Stream^.Seek(Loc);
Stream^.Write(FCtemp, SizeOf(FCtemp));
Stream^.Seek(Left);
Stream^.Write(FCLtemp, SizeOf(FCLtemp));
AvtCellRotateRight := Left;
end
end { AvtCellRotateRight };
{
procedure AvtCheckTree(AvtDr: PArvidDrive);
function AvtNodeHight(const Loc: LongInt): LongInt;
var
LeftHight: LongInt;
RightHight: LongInt;
begin with AvtDr^ do begin
AvtNodeHight:=0;
if Loc <> 0 then begin
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
LeftHight:=AvtNodeHight(FCtemp.LeftFileCell);
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
RightHight:=AvtNodeHight(FCtemp.RightFileCell);
if LeftHight >= RightHight then
AvtNodeHight:=LeftHight + 1 else
AvtNodeHight:=RightHight + 1;
end;
end end;
procedure AvtNodeCheck(const Loc: LongInt);
var
LeftHight: LongInt;
RightHight: LongInt;
Balance: LongInt;
begin with AvtDr^ do begin
if Loc <> 0 then begin
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
if (FCtemp.Flags and avtIsDir) <> 0 then begin
AvtNodeCheck(FCtemp.ChildOrSize);
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
end;
AvtNodeCheck(FCtemp.LeftFileCell);
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
AvtNodeCheck(FCtemp.RightFileCell);
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
LeftHight:=AvtNodeHight(FCtemp.LeftFileCell);
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
RightHight:=AvtNodeHight(FCtemp.RightFileCell);
Balance:=RightHight-LeftHight;
if (Balance < -1) or (Balance > 1) then
MessageBox(GetString(erInvalidFileFormat), nil, mfError + mfOKButton)
else begin
Balance:=(Balance shl 8) and $00000300;
Stream^.Seek(Loc); Stream^.Read(FCtemp, SizeOf(FCtemp));
if Balance <> (FCtemp.Flags and $00000300) then
MessageBox(GetString(erInvalidFileFormat), nil, mfError + mfOKButton);
end;
end;
end end;
begin
AvtNodeCheck(AvtDr^.AVT.RootDirCell);
end;
}
function AvtDelFile(AvtDr: PArvidDrive; AName: String): Boolean;
var
SaveCurDir: String;
CurDir2: String;
Dr: String;
Nm: String;
Xt: String;
SN: String;
FC: TAvtFileCell;
FCL: TAvtFileCell;
FCR: TAvtFileCell;
NewCurDirPos: LongInt;
DelDirAnswer: Word;
label 1;
procedure AvtDelCell(Loc: LongInt);
var
FC: TAvtFileCell;
T: TAvtTextCell;
L: LongInt;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
case FC.Flags and AvtCellFormat of
avtCell2:
L := FC.DescPtr2;
avtCell3:
L := FC.DescPtr3;
else {case}
L := 0 {avtCell0,avtCell1};
end {case};
while L <> 0 do
begin
Stream^.Seek(L);
Stream^.Read(T, SizeOf(T));
AvtFreeCell(AvtDr, L);
L := T.NextTextCell;
end;
if FC.Flags and AvtCellFormat = avtCell3
then
L := FC.NamePtr
else
L := 0 {avtCell0,avtCell1,avtCell2};
while L <> 0 do
begin
Stream^.Seek(L);
Stream^.Read(T, SizeOf(T));
AvtFreeCell(AvtDr, L);
L := T.NextTextCell;
end;
AvtFreeCell(AvtDr, Loc);
end
end { AvtDelCell };
procedure AvtFreeTree(const Loc: LongInt);
begin
with AvtDr^ do
begin
if Loc = 0 then
Exit;
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
if FC.Flags and AvtIsDir <> 0 then
begin
AvtFreeTree(FC.ChildOrSize);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
end;
AvtFreeTree(FC.LeftFileCell);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
AvtFreeTree(FC.RightFileCell);
AvtDelCell(Loc);
end
end;
function AvtTreeNodeRemove(const Loc: LongInt): LongInt;
var
OldBalance: LongInt;
L0, L1, L2: LongInt;
function AvtRestoreLeftBalance(Loc: LongInt;
const OldBalance: LongInt): LongInt;
var
LeftBalance: LongInt;
CurBalance: LongInt;
RightZeroBal: Boolean;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
CurBalance := FC.Flags and avtBalance;
if FC.LeftFileCell <> 0 then
begin
Stream^.Seek(FC.LeftFileCell);
Stream^.Read(FCL, SizeOf(FCL));
LeftBalance := FCL.Flags and avtBalance;
end;
if (FC.LeftFileCell = 0) or
( (LeftBalance <> OldBalance) and (LeftBalance = 0))
then
begin
FC.Flags := FC.Flags and (not avtBalance);
{ if CurBalance = $00000300 then FC.Flags:=FC.Flags or $00000000 else}
if CurBalance = $00000000 then
FC.Flags := FC.Flags or $00000100
else
{ if CurBalance = $00000100}
begin
Stream^.Seek(FC.RightFileCell);
Stream^.Read(FCR, SizeOf(FCR));
RightZeroBal := (FCR.Flags and avtBalance) = 0;
Loc := AvtCellRotateLeft(AvtDr, Loc);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
Stream^.Seek(FC.LeftFileCell);
Stream^.Read(FCL, SizeOf(FCL));
if RightZeroBal then
begin
FC.Flags := (FC.Flags and (not avtBalance)) or $00000300;
FCL.Flags := (FCL.Flags and (not avtBalance)) or $00000100;
end
else
begin
FC.Flags := (FC.Flags and (not avtBalance)) {or $00000000};
FCL.Flags := (FCL.Flags and (not avtBalance)) {or $00000000};
end;
Stream^.Seek(FC.LeftFileCell);
Stream^.Write(FCL, SizeOf(FCL));
end;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtRestoreLeftBalance := Loc;
end
end { AvtRestoreLeftBalance };
function AvtRestoreRightBalance(Loc: LongInt;
const OldBalance: LongInt): LongInt;
var
RightBalance: LongInt;
CurBalance: LongInt;
LeftZeroBal: Boolean;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
CurBalance := FC.Flags and avtBalance;
if FC.RightFileCell <> 0 then
begin
Stream^.Seek(FC.RightFileCell);
Stream^.Read(FCR, SizeOf(FCR));
RightBalance := FCR.Flags and avtBalance;
end;
if (FC.RightFileCell = 0) or
( (RightBalance <> OldBalance) and (RightBalance = 0))
then
begin
FC.Flags := FC.Flags and $FFFFFCFF;
{ if CurBalance = $00000100 then FC.Flags:=FC.Flags or $00000000 else}
if CurBalance = $00000000 then
FC.Flags := FC.Flags or $00000300
else
{ if CurBalance = $00000300}
begin
Stream^.Seek(FC.LeftFileCell);
Stream^.Read(FCL, SizeOf(FCL));
LeftZeroBal := (FCL.Flags and avtBalance) = 0;
Loc := AvtCellRotateRight(AvtDr, Loc);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
Stream^.Seek(FC.RightFileCell);
Stream^.Read(FCR, SizeOf(FCR));
if LeftZeroBal then
begin
FC.Flags := (FC.Flags and (not avtBalance)) or $00000100;
FCR.Flags := (FCR.Flags and (not avtBalance)) or $00000300;
end
else
begin
FC.Flags := (FC.Flags and (not avtBalance)) {or $00000000};
FCR.Flags := (FCR.Flags and (not avtBalance)) {or $00000000};
end;
Stream^.Seek(FC.RightFileCell);
Stream^.Write(FCR, SizeOf(FCR));
end;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtRestoreRightBalance := Loc;
end
end { AvtRestoreRightBalance };
function AvtTreeRemoveLeftmost(const Loc: LongInt): LongInt;
var
OldBalance: LongInt;
L1, L2: LongInt;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
if FC.LeftFileCell = 0 then
begin
l0 := Loc;
AvtTreeRemoveLeftmost := FC.RightFileCell;
Exit;
end;
L1 := FC.LeftFileCell;
Stream^.Seek(L1);
Stream^.Read(FC, SizeOf(FC));
OldBalance := FC.Flags and avtBalance;
L2 := AvtTreeRemoveLeftmost(L1);
if L1 <> L2 then
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.LeftFileCell := L2;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtTreeRemoveLeftmost := AvtRestoreLeftBalance(Loc, OldBalance);
end
end { AvtTreeRemoveLeftmost };
function AvtTreeRemoveRightmost(const Loc: LongInt): LongInt;
var
OldBalance3: LongInt;
L1, L2: LongInt;
begin
with AvtDr^ do
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
if FC.RightFileCell = 0 then
begin
l0 := Loc;
AvtTreeRemoveRightmost := FC.LeftFileCell;
Exit;
end;
L1 := FC.RightFileCell;
Stream^.Seek(L1);
Stream^.Read(FC, SizeOf(FC));
OldBalance := FC.Flags and avtBalance;
L2 := AvtTreeRemoveRightmost(L1);
if L1 <> L2 then
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.RightFileCell := L2;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtTreeRemoveRightmost := AvtRestoreRightBalance(Loc, OldBalance);
end
end { AvtTreeRemoveRightmost };
{ function AvtTreeNodeRemove(const Loc: LongInt): LongInt; }
begin { AvtTreeNodeRemove }
with AvtDr^ do
begin
AvtTreeNodeRemove := Loc;
if Loc = 0 then
Exit;
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
SN := AvtCellName(FC, Stream^);
if AvtCMP(AName, SN) < 0 then
begin
L1 := FC.LeftFileCell;
if L1 <> 0 then
begin
Stream^.Seek(L1);
Stream^.Read(FC, SizeOf(FC));
OldBalance := FC.Flags and avtBalance;
L2 := AvtTreeNodeRemove(L1);
if L1 <> L2 then
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.LeftFileCell := L2;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtTreeNodeRemove := AvtRestoreLeftBalance(Loc, OldBalance);
end;
end
else if AvtCMP(AName, SN) > 0 then
begin
L1 := FC.RightFileCell;
if L1 <> 0 then
begin
Stream^.Seek(L1);
Stream^.Read(FC, SizeOf(FC));
OldBalance := FC.Flags and avtBalance;
L2 := AvtTreeNodeRemove(L1);
if L1 <> L2 then
begin
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.RightFileCell := L2;
Stream^.Seek(Loc);
Stream^.Write(FC, SizeOf(FC));
end;
AvtTreeNodeRemove := AvtRestoreRightBalance(Loc, OldBalance);
end;
end
else
begin
if (FC.Flags and AvtIsDir) <> 0 then
begin
DelDirAnswer := cmOK;
if (not ArvidDeleteAllFiles) then
begin
Dec(SkyEnabled);
if Confirms and cfEraseSubDir = 0 then
DelDirAnswer := cmYes
else
begin
DelDirAnswer := cmCancel;
if FC.ChildOrSize = 0 then
DelDirAnswer := cmOK
else
begin
Stream^.Seek(FC.ChildOrSize);
Stream^.Read(FCR, SizeOf(FCR));
if (FCR.LeftFileCell = 0) and (FCR.RightFileCell = 0)
then
DelDirAnswer := cmOK
else
begin
if AvtCellName(FCR, Stream^) = '..' then
DelDirAnswer := cmOK
else
DelDirAnswer := MessageBox
(^C+GetString(dlDirectory)+' '+
CharToOemStr(Cut(AName, 40))+
GetString(dlEraseDirNotEmpty), nil,
mfConfirmation+mfNoButton+mfAllButton+
mf2YesButton+mfCancelButton);
end;
end;
end;
Inc(SkyEnabled);
ArvidDeleteAllFiles := DelDirAnswer = cmOK;
Abort := DelDirAnswer = cmCancel;
end;
if not (DelDirAnswer in [cmYes, cmOK]) then
Exit;
AvtFreeTree(FC.ChildOrSize);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
end;
AvtDelFile := True;
if FC.RightFileCell = 0 then
AvtTreeNodeRemove := FC.LeftFileCell
else
case (FC.Flags and avtBalance) of
0, $00000100:
begin
L1 := FC.RightFileCell;
Stream^.Seek(L1);
Stream^.Read(FCR, SizeOf(FCR));
OldBalance := FCR.Flags and avtBalance;
L2 := AvtTreeRemoveLeftmost(L1);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.RightFileCell := L2;
Stream^.Seek(L0);
Stream^.Read(FCL, SizeOf(FCL));
FCL.LeftFileCell := FC.LeftFileCell;
FCL.RightFileCell := FC.RightFileCell;
FCL.Flags := (FCL.Flags and (not avtBalance))
or (FC.Flags and $00000300);
Stream^.Seek(L0);
Stream^.Write(FCL, SizeOf(FCL));
AvtTreeNodeRemove := AvtRestoreRightBalance(L0, OldBalance);
end;
$00000300:
begin
L1 := FC.LeftFileCell;
Stream^.Seek(L1);
Stream^.Read(FCL, SizeOf(FCL));
OldBalance := FCL.Flags and avtBalance;
L2 := AvtTreeRemoveRightmost(L1);
Stream^.Seek(Loc);
Stream^.Read(FC, SizeOf(FC));
FC.LeftFileCell := L2;
Stream^.Seek(L0);
Stream^.Read(FCR, SizeOf(FCR));
FCR.LeftFileCell := FC.LeftFileCell;
FCR.RightFileCell := FC.RightFileCell;
FCR.Flags := (FCR.Flags and (not avtBalance))
or (FC.Flags and $00000300);
Stream^.Seek(L0);
Stream^.Write(FCR, SizeOf(FCR));
AvtTreeNodeRemove := AvtRestoreLeftBalance(L0, OldBalance);
end;
end {case};
AvtDelCell(Loc);
end;
end
end { AvtTreeNodeRemove };
{ function AvtDelFile( AName: PathStr): Boolean; }
begin { AvtDelFile }
with AvtDr^ do
begin
AvtDelFile := False;
SaveCurDir := CurDir;
if (filetype <> avdAvt) or (Length(AName) = 0) then
goto 1;
CurDir2 := CurDir;
MakeSlash(CurDir2);
if AName[1] <> '\' then
begin
AName := CurDir2+AName;
end;
lFSplit(AName, Dr, Nm, Xt);
if (Dr[1] = '\') and (Length(Dr) > 1) then
Delete(Dr, 1, 1); {DelFC(Dr);}
if CurDir2 <> Dr then
begin
CurDir := Dr;
SeekDirectory;
CurDir2 := CurDir;
MakeSlash(CurDir2);
if CurDir <> Dr then
goto 1;
end;
AName := Nm+Xt;
if Length(AName) = 0 then
goto 1;
Stream^.Status := stOK;
OemToCharSt(AName);
NewCurDirPos := AvtTreeNodeRemove(CurDirPos);
if NewCurDirPos <> CurDirPos then
begin
if CurDirCellPos = 0 then
begin
AVT.RootDirCell := NewCurDirPos;
Stream^.Seek(0);
Stream^.Write(AVT, SizeOf(AVT));
end
else
begin
Stream^.Seek(CurDirCellPos);
Stream^.Read(FC, SizeOf(FC));
FC.ChildOrSize := NewCurDirPos;
Stream^.Seek(CurDirCellPos);
Stream^.Write(FC, SizeOf(FC));
end;
CurDirPos := NewCurDirPos;
end;
1:
CurDir := SaveCurDir;
SeekDirectory;
end
end { AvtDelFile };
function AvtNewFile(
AvtDr: PArvidDrive;
AName: String;
ADescription: String;
AIsDir: Boolean;
AChildOrSize: LongInt;
ATime: LongInt;
AStartSector: LongInt;
AAttr: Word): Word;
var
SaveCurDir: String;
CurDir2: String;
Dr: String;
Nm: String;
Xt: String;
SN: String;
SS: String;
FC: TAvtFileCell;
NewCurDirPos: LongInt;
NewCell: LongInt;
Lv: Integer;
NewCellFailed: Boolean;
FailedCellIsDir: Boolean;
CreatedCellIsDir: Boolean;
NewCellIsDir: Boolean;
FirstNameProcessed: Boolean;
function AvtPutText(S: String): LongInt;
var
T: TAvtTextCell;
L, L2: LongInt;
I: Integer;
begin
with AvtDr^ do
begin
if S = '' then
begin
AvtPutText := 0;
Exit;
end;
L := AvtGetCell(AvtDr);
AvtPutText := L;
while L <> 0 do
begin
for I := 1 to 36 do
begin
if Length(S) <> 0 then
begin
T.Data[I] := S[1];
Delete(S, 1, 1); {DelFC(S);}
end
else
T.Data[I] := #0;
end;
L2 := 0;
if Length(S) <> 0 then
L2 := AvtGetCell(AvtDr);
T.NextTextCell := L2;
Stream^.Seek(L);
L := L2;
Stream^.Write(T, SizeOf(T));
end;
end
end { AvtPutText };
procedure AvtPutName(S: String);
var
I: Integer;
begin
with AvtDr^ do
begin
if Length(S) < 13 then
begin
FC.Flags := (FC.Flags and (not AvtCellFormat)) or avtCell2;
for I := 1 to 12 do
begin
if Length(S) <> 0 then
begin
FC.Name2[I] := S[1];
Delete(S, 1, 1); {DelFC(S);}
end
else
FC.Name2[I] := #0;
end;
end
else
begin
FC.Flags := (FC.Flags and (not AvtCellFormat)) or avtCell3;
FC.NamePtr := AvtPutText(S);
end;
end
end { AvtPutName };
procedure AvtPutDesc(S: String);
begin
with AvtDr^ do
begin
if Length(S) <> 0 then
FC.DescPtr2 := AvtPutText(S)
else
FC.DescPtr2 := 0;
end
end;
procedure AvtNewCell;
begin
with AvtDr^ do
begin
NewCell := AvtGetCell(AvtDr);
FC.Flags := 0;
if (AName[1] = '\') or AIsDir then
AAttr := AAttr or Directory
else
AAttr := AAttr and not Directory;
FC.Attr := AAttr;
FC.LeftFileCell := 0;
FC.RightFileCell := 0;
FC.StartSector := 0;
FC.ChildOrSize := AChildOrSize;
FC.Time := ATime;
if (AName[1] = '\') or AIsDir then
begin
FC.Flags := (FC.Flags and (not AvtIsDir)) or AvtIsDir;
end;
if (AName = '') or (AName = '\') then
AvtPutDesc(ADescription)
else
AvtPutDesc('');
AvtPutName(SS);
CreatedCellIsDir := True;
if (FC.Flags and AvtIsDir) = 0 then
begin
FC.StartSector := AStartSector;
CreatedCellIsDir := False;
end;
Stream^.Seek(NewCell);
Stream^.Write(FC, SizeOf(FC));
AvtNewFile := 1;
end
end { AvtNewCell };
function AvtTreeNodeInsert(APos: LongInt): LongInt;
var
OldBalance: LongInt;
NewPointer: LongInt;
begin
with AvtDr^ do
begin
if APos = 0 then
begin
AvtNewCell;
AvtTreeNodeInsert := NewCell;
Exit;
end;
Stream^.Seek(APos);
Stream^.Read(FCtemp, SizeOf(FCtemp));
SN := AvtCellName(FCtemp, Stream^);
AvtTreeNodeInsert := APos;
if SS = SN then
begin
FailedCellIsDir := (FCtemp.Flags and AvtIsDir) <> 0;
NewCellFailed := True;
Exit;
end;
if AvtCMP(SS, SN) < 0 then
begin
if FCtemp.LeftFileCell <> 0 then
begin
Stream^.Seek(FCtemp.LeftFileCell);
Stream^.Read(FCLtemp, SizeOf(FCLtemp));
OldBalance := FCLtemp.Flags and avtBalance;
NewPointer := AvtTreeNodeInsert(FCtemp.LeftFileCell);
Stream^.Seek(APos);
Stream^.Read(FCtemp, SizeOf(FCtemp));
if NewPointer <> FCtemp.LeftFileCell then
begin
FCtemp.LeftFileCell := NewPointer;
Stream^.Seek(APos);
Stream^.Write(FCtemp, SizeOf(FCtemp));
end;
Stream^.Seek(FCtemp.LeftFileCell);
Stream^.Read(FCLtemp, SizeOf(FCLtemp));
if ( (FCLtemp.Flags and avtBalance) <> OldBalance) and
( (FCLtemp.Flags and avtBalance) <> 0)
then