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Borland C++ V5.02
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OWLINC.PAK
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FILEDOC.H
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C/C++ Source or Header
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1997-05-06
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132 lines
//----------------------------------------------------------------------------
// ObjectWindows
// Copyright (c) 1992, 1997 by Borland International, All Rights Reserved
//
//$Revision: 10.5 $
//
// Definition of class TFileDocument
//----------------------------------------------------------------------------
#if !defined(OWL_FILEDOC_H)
#define OWL_FILEDOC_H
#if !defined(OWL_DOCVIEW_H)
# include <owl/docview.h>
#endif
#if !defined(__IOSTREAM_H)
# include <iostream.h>
#endif
#if defined(BI_NAMESPACE)
namespace OWL {
#endif
// Generic definitions/compiler options (eg. alignment) preceeding the
// definition of classes
#include <services/preclass.h>
//
// class TFileDocument
// ~~~~~ ~~~~~~~~~~~~~
class _OWLCLASS TFileDocument : public TDocument {
public:
enum TFileDocProp {
PrevProperty = TDocument::NextProperty-1,
CreateTime, // FILETIME
ModifyTime, // FILETIME
AccessTime, // FILETIME
StorageSize, // ulong
FileHandle, // platform file handle (HFILE if Windows)
NextProperty,
};
TFileDocument(TDocument* parent = 0);
~TFileDocument();
// Implement virtual methods of TDocument
//
bool Open(int mode, const char far* path=0);
bool Close();
TInStream* InStream(int mode, const char far* strmId=0);
TOutStream* OutStream(int mode, const char far* strmId=0);
bool Commit(bool force = false);
bool Revert(bool clear = false);
bool IsOpen();
int FindProperty(const char far* name); // return index
int PropertyFlags(int index);
const char* PropertyName(int index);
int PropertyCount();
int GetProperty(int index, void far* dest, int textlen=0);
bool SetProperty(int index, const void far* src);
// Additional methods for file document
//
bool Open(HFILE fhdl); // open on existing file handle
protected:
HFILE OpenThisFile(int omode, const char far* name, streampos* pseekpos);
void CloseThisFile(HFILE fhdl, int omode);
protected_data:
HFILE FHdl; // file handle if held open at the document level
private: // cached info for property access
bool InfoPresent;
ulong FileLength;
#if defined(BI_PLAT_WIN32)
FILETIME FileCreateTime;
FILETIME FileAccessTime;
FILETIME FileUpdateTime;
#else
ulong CalcFileLength(HFILE file);
ulong FileTime;
#endif
DECLARE_STREAMABLE(_OWLCLASS, TFileDocument,1);
friend class _OWLCLASS_RTL TFileInStream;
friend class _OWLCLASS_RTL TFileOutStream;
};
// Generic definitions/compiler options (eg. alignment) following the
// definition of classes
#include <services/posclass.h>
#if defined(BI_NAMESPACE)
} // namespace OWL
#endif
//----------------------------------------------------------------------------
// Inline implementations
//
//
inline TFileDocument::TFileDocument(TDocument* parent)
:
TDocument(parent), FHdl(HFILE_ERROR), InfoPresent(false)
{
}
//
inline TFileDocument::~TFileDocument()
{
}
//
inline bool TFileDocument::IsOpen()
{
return FHdl != HFILE_ERROR || TDocument::IsOpen();
}
//
// Return the number of property support by this document.
// NOTE: The property count includes properties inherited from base document
// classes.
//
inline int TFileDocument::PropertyCount()
{
return NextProperty - 1;
}
#endif // OWL_FILEDOC_H