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The Mini Shell Extension Framework – Part III

By , 18 Sep 2005
msf091.zip
include
columnprovider.rgs
contextmenu.rgs
contextmenu_sf.rgs
extension.rgs
extractimage_sf.rgs
infotip.rgs
infotip_sf.rgs
propertysheetext.rgs
propertysheetext_sf.rgs
shell32missing.def
shell32missing.lib
shellfolder.rgs
shellfolderwin98.rgs
vvvsample
Copy of sample1.vvv
menuicon.bmp
sample.def
sample.manifest
sample1.vvv
vvv.ico
vvvtest
sample.yyy
sample1.vvv
sample2.vvv
//
// (C) Copyright by Victor Derks <vba64@xs4all.nl>
//
// See README.TXT for detailed details of the software licence.
//
#include "stdafx.h"
#include "vvvfile.h"
#include "../include/util.h"
#include "../include/strutil.h"


const TCHAR* TSZ_APP_NAME_DIRECTORY = _T("directory");
const TCHAR* TSZ_FILE_COUNT         = _T("filecount");
const TCHAR* TSZ_FILE_FORMAT        = _T("file%d");
const TCHAR* TSZ_LABEL              = _T("label");
const TCHAR* TSZ_NAME               = _T("name");
const TCHAR* TSZ_SIZE               = _T("size");
const TCHAR* TSZ_ACTIVE             = _T("active");
const TCHAR* TSZ_FOLDER             = _T("folder");


CString CVVVFile::GetLabel() const
{
	return GetPrivateProfileString(GetAppNameDirectory(), TSZ_LABEL);
}


void CVVVFile::SetLabel(const CString& strLabel) const
{
	WritePrivateProfileString(GetAppNameDirectory(), TSZ_LABEL, strLabel);
}


unsigned int CVVVFile::GetFileCount() const
{
	unsigned int nCount = GetPrivateProfileInt(TSZ_APP_NAME_DIRECTORY, TSZ_FILE_COUNT);
	RaiseExceptionIf(nCount == static_cast<UINT>(-1));

	return nCount;
}


// Purpose: Scans a .vvv file and collects all active items.
//          VVV items are unique by index. To support this concept
//          deleted items become inactive but are not removed.
//          This to prevent that a delete action causes other items
//          to get a new index.
auto_ptr<CVVVItems> CVVVFile::GetItems(DWORD grfFlags) const
{
	auto_ptr<CVVVItems> qitems(new CVVVItems);

	for (unsigned int n = 0;; ++n)
	{
		CString strAppName = GetAppNameItem(n);

		unsigned int nActive = GetPrivateProfileInt(strAppName, TSZ_ACTIVE, -1);
		if (nActive == -1)
			break;

		if (nActive == 1)
		{
			bool bFolder = GetPrivateProfileInt(strAppName, TSZ_FOLDER) == 1;

			if ((IsBitSet(grfFlags, SHCONTF_NONFOLDERS) && !bFolder) ||
				(IsBitSet(grfFlags, SHCONTF_FOLDERS) && bFolder))
			{
				unsigned int nSize = GetPrivateProfileInt(strAppName, TSZ_SIZE);
				RaiseExceptionIf(nSize == static_cast<UINT>(-1));
				CString strName = GetPrivateProfileString(strAppName, TSZ_NAME);

				qitems->push_back(CVVVItem(n, nSize, bFolder, strName));
			}
		}
	}

	return qitems;
}


void CVVVFile::DeleteItems(const CVVVItems& items) const
{
	for (CVVVItems::const_iterator it = items.begin(); it != items.end(); ++it)
	{
		DeleteItem(*it);
	}

	SetFileCount(GetFileCount() - items.size());

	// Note: due to .ini file implementation, inactive items will stay in .ini file.
}


void CVVVFile::SetItem(const CVVVItem& item) const
{
	CString strAppNameItem = GetAppNameItem(item.GetID());

	WritePrivateProfileString(strAppNameItem, TSZ_NAME, item.GetName());
	WritePrivateProfileInt(strAppNameItem, TSZ_SIZE, item.GetSize());
}


auto_ptr<CVVVItem> CVVVFile::AddItem(const CString& strFile) const
{
	CString strName = PathFindFileName(strFile);
	DWORD dwSize    = GetFileSize(strFile);

	return AddItem(dwSize, strName);
}


auto_ptr<CVVVItem> CVVVFile::AddItem(unsigned int nSize, const CString& strName) const
{
	unsigned int nId = FindFreeEntry();

	std::auto_ptr<CVVVItem> qitem(new CVVVItem(nId, nSize, false, strName));

	AddItem(*qitem);

	return qitem;
}


void CVVVFile::AddItem(const CVVVItem& item) const
{
	SetItem(item);

	WritePrivateProfileInt(GetAppNameItem(item.GetID()), TSZ_ACTIVE, 1);

	SetFileCount(GetFileCount() + 1);
}


void CVVVFile::DeleteItem(const CVVVItem& item) const
{
	CString strAppNameItem = GetAppNameItem(item.GetID());

	ATLASSERT(GetPrivateProfileInt(strAppNameItem, TSZ_ACTIVE) == 1); // item was already deleted!

	WritePrivateProfileInt(strAppNameItem, TSZ_ACTIVE, 0);
}


unsigned int CVVVFile::FindFreeEntry() const
{
	for (unsigned int n = 0;; ++n)
	{
		CString strAppName = GetAppNameItem(n);

		unsigned int nActive = GetPrivateProfileInt(strAppName, TSZ_ACTIVE);

		if (nActive != 1)
			return n;
	}
}


void CVVVFile::SetFileCount(UINT nNewFileCount) const
{
	return WritePrivateProfileInt(GetAppNameDirectory(), TSZ_FILE_COUNT, nNewFileCount);
}


CString CVVVFile::GetAppNameDirectory() const
{
	CString strAppName;

	if (_strFolder.IsEmpty())
	{
		strAppName = TSZ_APP_NAME_DIRECTORY;
	}
	else
	{
		strAppName = _strFolder + _T("\\") + TSZ_APP_NAME_DIRECTORY;
	}

	return strAppName;
}


CString CVVVFile::GetAppNameItem(unsigned int nID) const
{
	CString strAppName;
	strAppName.Format(TSZ_FILE_FORMAT, nID);

	if (!_strFolder.IsEmpty())
	{
		strAppName = _strFolder + _T("\\") + strAppName;
	}

	return strAppName;
}


CString CVVVFile::GetPrivateProfileString(LPCTSTR lpAppName, LPCTSTR lpKeyName) const
{
	TCHAR tszBuf[255];

	::GetPrivateProfileString(lpAppName, lpKeyName, _T(""), tszBuf, 255, _strFilename);

	return tszBuf;
}


UINT CVVVFile::GetPrivateProfileInt(LPCTSTR lpAppName, LPCTSTR lpKeyName, int nDefault) const
{
	return ::GetPrivateProfileInt(lpAppName, lpKeyName, nDefault, _strFilename);
}


void CVVVFile::WritePrivateProfileString(LPCTSTR lpAppName, LPCTSTR lpKeyName, LPCTSTR lpString) const
{
	RaiseLastErrorExceptionIf(
		!::WritePrivateProfileString(lpAppName, lpKeyName, lpString, _strFilename));
}


void CVVVFile::WritePrivateProfileInt(LPCTSTR lpAppName, LPCTSTR lpKeyName, UINT nValue) const
{
	WritePrivateProfileString(lpAppName, lpKeyName, ToString(nValue));
}

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License

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About the Author

Victor Derks
Architect GE Healthcare
Netherlands Netherlands
Victor lives in Nijmegen, the oldest city in The Netherlands.
He studied Applied Physics in Delft and now works for GE Healthcare.

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