sxziputils.pas

skin components for design of your applicastions

  raise Exception.Create('Index out of range.');
 CompressedStream:=TStringStream.Create('');
 try
  Compressor:=TCompressionStream.Create(clDefault{clMax},CompressedStream);
  try
   Compressor.Write(PChar(Value)^,length(Value));
  finally
   Compressor.Free;
  end;
  UseUncompressed:=length(Value)<=length(CompressedStream.DataString)-6;
  if UseUncompressed then
   Files[I].CompressedData:=Value else
    Files[I].CompressedData:=Copy(CompressedStream.DataString,3,length(CompressedStream.DataString)-6);
  Files[I].LocalFileHeaderSignature:=$04034B50;
  with Files[I].CommonFileHeader do
   begin
    VersionNeededToExtract:=20;
    GeneralPurposeBitFlag:=0;
    if UseUncompressed then
     CompressionMethod:=0 else
      CompressionMethod:=8;
    LastModFileTimeDate:=DateTimeToFileDate(Now);
    Crc32:=ZipCRC32(Value);
    CompressedSize:=length(Files[I].CompressedData);
    UncompressedSize:=length(Value);
    FilenameLength:=length(Files[I].FileName);
    ExtraFieldLength:=length(Files[I].ExtraField);
   end;
  with CentralDirectory[I] do
   begin
    CentralFileHeaderSignature:=$02014B50;
    VersionMadeBy:=20;
    CommonFileHeader:=Files[i].CommonFileHeader;
    FileCommentLength:=0;
    DiskNumberStart:=0;
    InternalFileAttributes := 0;
    RelativeOffsetOfLocalHeader := 0;
    FileName:=Files[i].FileName;
    ExtraField:=Files[i].ExtraField;
    FileComment:='';
   end;
 finally
  CompressedStream.Free;
 end;
end;

procedure TZipFile.AddFile(const Name:String;FAttribute:DWORD=0);
begin
 SetLength(Files,High(Files)+2);
 SetLength(CentralDirectory,length(Files));
 Files[High(Files)].FileName:=Name;
 Files[High(Files)].CompressedData:='';
 Files[High(Files)].ExtraField:='';
 Files[High(Files)].LocalFileHeaderSignature:=$04034B50;
 with Files[High(Files)].CommonFileHeader do
  begin
   VersionNeededToExtract:=20;
   GeneralPurposeBitFlag:=0;
   CompressionMethod:=8;
   LastModFileTimeDate:=DateTimeToFileDate(Now);
   Crc32:=0;
   CompressedSize:=0;
   UncompressedSize:=0;
   FilenameLength:=length(Files[High(Files)].FileName);
   ExtraFieldLength:=length(Files[High(Files)].ExtraField);
  end;
 with CentralDirectory[High(Files)] do
  begin
   CentralFileHeaderSignature:=$02014B50;
   VersionMadeBy:=20;
   CommonFileHeader:=Files[High(Files)].CommonFileHeader;
   FileCommentLength:=0;
   DiskNumberStart:=0;
   InternalFileAttributes:=0;
   ExternalFileAttributes:=FAttribute;
   RelativeOffsetOfLocalHeader:=0;
   FileName:=Files[High(Files)].FileName;
   ExtraField:=Files[High(Files)].ExtraField;
   FileComment:='';
  end;
end;

function TZipFile.GetDateTime(I:Integer):TDateTime;
begin
 if I>High(Files) then
  raise Exception.Create('Index out of range.');
 Result:=FileDateToDateTime(Files[i].CommonFileHeader.LastModFileTimeDate);
end;

procedure TZipFile.SetDateTime(I:Integer;const Value:TDateTime);
begin
 if I>High(Files) then
  raise Exception.Create('Index out of range.');
 Files[i].CommonFileHeader.LastModFileTimeDate:=DateTimeToFileDate(Value);
end;

function TZipFile.GetCount:Integer;
begin
 Result:=High(Files)+1;
end;

function TZipFile.GetName(I:Integer):String;
begin
 Result:=Files[I].FileName;
end;

procedure TZipFile.SetName(I:Integer;const Value:String);
begin
 Files[I].FileName:=Value;
end;

{ ZipCRC32 }

function ZipCRC32(const Data:String):Cardinal;
const CRCTable:array[0..255]of DWORD=(
    $00000000, $77073096, $EE0E612C, $990951BA, $076DC419, $706AF48F, $E963A535,
    $9E6495A3, $0EDB8832, $79DCB8A4, $E0D5E91E, $97D2D988, $09B64C2B, $7EB17CBD,
    $E7B82D07, $90BF1D91, $1DB71064, $6AB020F2, $F3B97148, $84BE41DE, $1ADAD47D,
    $6DDDE4EB, $F4D4B551, $83D385C7, $136C9856, $646BA8C0, $FD62F97A, $8A65C9EC,
    $14015C4F, $63066CD9, $FA0F3D63, $8D080DF5, $3B6E20C8, $4C69105E, $D56041E4,
    $A2677172, $3C03E4D1, $4B04D447, $D20D85FD, $A50AB56B, $35B5A8FA, $42B2986C,
    $DBBBC9D6, $ACBCF940, $32D86CE3, $45DF5C75, $DCD60DCF, $ABD13D59, $26D930AC,
    $51DE003A, $C8D75180, $BFD06116, $21B4F4B5, $56B3C423, $CFBA9599, $B8BDA50F,
    $2802B89E, $5F058808, $C60CD9B2, $B10BE924, $2F6F7C87, $58684C11, $C1611DAB,
    $B6662D3D, $76DC4190, $01DB7106, $98D220BC, $EFD5102A, $71B18589, $06B6B51F,
    $9FBFE4A5, $E8B8D433, $7807C9A2, $0F00F934, $9609A88E, $E10E9818, $7F6A0DBB,
    $086D3D2D, $91646C97, $E6635C01, $6B6B51F4, $1C6C6162, $856530D8, $F262004E,
    $6C0695ED, $1B01A57B, $8208F4C1, $F50FC457, $65B0D9C6, $12B7E950, $8BBEB8EA,
    $FCB9887C, $62DD1DDF, $15DA2D49, $8CD37CF3, $FBD44C65, $4DB26158, $3AB551CE,
    $A3BC0074, $D4BB30E2, $4ADFA541, $3DD895D7, $A4D1C46D, $D3D6F4FB, $4369E96A,
    $346ED9FC, $AD678846, $DA60B8D0, $44042D73, $33031DE5, $AA0A4C5F, $DD0D7CC9,
    $5005713C, $270241AA, $BE0B1010, $C90C2086, $5768B525, $206F85B3, $B966D409,
    $CE61E49F, $5EDEF90E, $29D9C998, $B0D09822, $C7D7A8B4, $59B33D17, $2EB40D81,
    $B7BD5C3B, $C0BA6CAD, $EDB88320, $9ABFB3B6, $03B6E20C, $74B1D29A, $EAD54739,
    $9DD277AF, $04DB2615, $73DC1683, $E3630B12, $94643B84, $0D6D6A3E, $7A6A5AA8,
    $E40ECF0B, $9309FF9D, $0A00AE27, $7D079EB1, $F00F9344, $8708A3D2, $1E01F268,
    $6906C2FE, $F762575D, $806567CB, $196C3671, $6E6B06E7, $FED41B76, $89D32BE0,
    $10DA7A5A, $67DD4ACC, $F9B9DF6F, $8EBEEFF9, $17B7BE43, $60B08ED5, $D6D6A3E8,
    $A1D1937E, $38D8C2C4, $4FDFF252, $D1BB67F1, $A6BC5767, $3FB506DD, $48B2364B,
    $D80D2BDA, $AF0A1B4C, $36034AF6, $41047A60, $DF60EFC3, $A867DF55, $316E8EEF,
    $4669BE79, $CB61B38C, $BC66831A, $256FD2A0, $5268E236, $CC0C7795, $BB0B4703,
    $220216B9, $5505262F, $C5BA3BBE, $B2BD0B28, $2BB45A92, $5CB36A04, $C2D7FFA7,
    $B5D0CF31, $2CD99E8B, $5BDEAE1D, $9B64C2B0, $EC63F226, $756AA39C, $026D930A,
    $9C0906A9, $EB0E363F, $72076785, $05005713, $95BF4A82, $E2B87A14, $7BB12BAE,
    $0CB61B38, $92D28E9B, $E5D5BE0D, $7CDCEFB7, $0BDBDF21, $86D3D2D4, $F1D4E242,
    $68DDB3F8, $1FDA836E, $81BE16CD, $F6B9265B, $6FB077E1, $18B74777, $88085AE6,
    $FF0F6A70, $66063BCA, $11010B5C, $8F659EFF, $F862AE69, $616BFFD3, $166CCF45,
    $A00AE278, $D70DD2EE, $4E048354, $3903B3C2, $A7672661, $D06016F7, $4969474D,
    $3E6E77DB, $AED16A4A, $D9D65ADC, $40DF0B66, $37D83BF0, $A9BCAE53, $DEBB9EC5,
    $47B2CF7F, $30B5FFE9, $BDBDF21C, $CABAC28A, $53B39330, $24B4A3A6, $BAD03605,
    $CDD70693, $54DE5729, $23D967BF, $B3667A2E, $C4614AB8, $5D681B02, $2A6F2B94,
    $B40BBE37, $C30C8EA1, $5A05DF1B, $2D02EF8D);
var I:Integer;
begin
 Result:=$FFFFFFFF;
 for I:=0 to length(Data)-1 do
  Result:=(Result shr 8) xor (CRCTable[Byte(Result) xor Ord(Data[I+1])]);
 Result:=Result xor $FFFFFFFF;
end;

{ TSXPreloadedZipFile }

constructor TSXPreloadedZipFile.Create;
begin
 inherited;
end;

destructor TSXPreloadedZipFile.Destroy;
begin
 ZipFile.Free;
 inherited;
end;

{ TSXPreloadedZipFileList }

function TSXPreloadedZipFileList.Get(const Index:Integer):TSXPreloadedZipFile;
begin
 Result:=TSXPreloadedZipFile(FItem[Index]);
end;

procedure TSXPreloadedZipFileList.Put(const Index:Integer;const Item:TSXPreloadedZipFile);
begin
 FItem[Index]:=Item;
end;

function TSXPreloadedZipFileList.GetCount:Integer;
begin
 Result:=FItem.Count;
end;

procedure TSXPreloadedZipFileList.Add(ZipFile:TSXPreloadedZipFile);
begin
 FItem.Add(ZipFile);
end;

function TSXPreloadedZipFileList.GetZipFileIndex(const FileName:String):Integer;
var A:Integer;
begin
 for A:=0 to Count-1 do
  if SameText(Item[A].FileName,FileName) then
   begin
    Result:=A;
    exit;
   end;
 Result:=-1;
end;

procedure TSXPreloadedZipFileList.Delete(const Index:Integer);
begin
 Item[Index].Free;
 FItem.Delete(Index);
end;

procedure TSXPreloadedZipFileList.Clear;
var A:Integer;
begin
 for A:=0 to Count-1 do
  Item[A].Free;
 FItem.Clear;
end;

constructor TSXPreloadedZipFileList.Create;
begin
 inherited Create;
 FItem:=TList.Create;
end;

destructor TSXPreloadedZipFileList.Destroy;
begin
 Clear;
 FItem.Free;
 inherited Destroy;
end;

///////////////////////////////////////////////////////////////////////////////

function PreloadZipFile(Stream:TStream;const FilePath:String;
           SkinLibrary:Pointer):TZipFile;
var S:TStream;
    T:TSXPreloadedZipFile;
    A:Integer;
begin
 Result:=nil;
 if Stream=nil then
  begin
   if not FileExists(FilePath) then exit;
   S:=TFileStream.Create(FilePath,fmOpenRead or fmShareDenyWrite);
  end else S:=Stream;
 try
  T:=TSXPreloadedZipFile.Create;
  T.FileName:=ExtractFileName(FilePath);
  T.FullPath:=FilePath;
  T.ZipFile:=TZipFile.Create;
  T.ZipFile.LoadFromStream(S);
  Result:=T.ZipFile;
  T.SkinLibrary:=SkinLibrary;
  A:=PreloadedZipFiles.GetZipFileIndex(T.FileName);
  if A>=0 then
   begin
    PreloadedZipFiles[A].Free;
    PreloadedZipFiles[A]:=T;
   end else PreloadedZipFiles.Add(T);
 finally
  if Stream=nil then S.Free;
 end;
end;

function GetPreloadedZipFile(SkinLibrary:Pointer;const FilePath:String):TZipFile;
var FileName,S:String;
             A:Integer;
          Skin:TSXStoredSkin;
begin
 FileName:=ExtractFileName(FilePath);
 A:=PreloadedZipFiles.GetZipFileIndex(FileName);
 if A>=0 then
  begin
   Result:=PreloadedZipFiles[A].ZipFile;
   exit;
  end;
 Skin:=GetStoredSkinByZIPName(FileName);
 if Skin<>nil then
  begin
   Result:=PreloadZipFile(Skin.Stream,FilePath,SkinLibrary);
   exit;
  end;
 if FileExists(FilePath) then
  Result:=PreloadZipFile(nil,FilePath,SkinLibrary) else
   begin
    S:=GetFullPath(FilePath,WithLastSlash(TSXSkinLibrary(SkinLibrary).SkinDir));
    if FileExists(S) then
     Result:=PreloadZipFile(nil,S,SkinLibrary) else
      Result:=nil;
   end;
end;       

procedure DeletePreloadedZipFiles(SkinLibrary:Pointer);
var A:Integer;
begin
 for A:=PreloadedZipFiles.Count-1 downto 0 do
  if PreloadedZipFiles[A].SkinLibrary=SkinLibrary then
   PreloadedZipFiles.Delete(A);
end;

function ExtractZipPath(var FilePath,ZipPath:String):Boolean;
var A,B:Integer;
begin
 B:=MaxInt;
 for A:=1 to length(FilePath) do
  begin
   if FilePath[A]=':' then
    begin
     Result:=False;
     exit;
    end;
   if (FilePath[A]='/') or (FilePath[A]='\') then
    begin
     B:=A-1;
     break;
    end;
  end;
 if SameText(ExtractFileExt(Copy(FilePath,1,B)),'.zip') then
  begin
   ZipPath:=Copy(FilePath,1,B);
   FilePath:=Copy(FilePath,B+2,MaxInt);
   Result:=True;
   exit;
  end;
 Result:=False; 
end;

initialization

 PreloadedZipFiles:=TSXPreloadedZipFileList.Create;

finalization

 PreloadedZipFiles.Free;

end.