The Mini Shell Extension Framework – Part III

//
// (C) Copyright by Victor Derks <vba64@xs4all.nl>
//
// See README.TXT for the details of the software licence.
//
#pragma once


// Purpose: emulated version of the system shell folder view
//          As this version has full source it makes things easier to understand.

// TODO: make this CDefView at least do the 'view' part.


#include "shellviewimpl.h"


namespace MSF
{

class CCallback
{
public:
	CCallback(IShellFolderViewCB* pshellfolderviewcb) :
		_rshellfolderviewcb(pshellfolderviewcb)
	{
	}


	HRESULT CallCB(UINT uMsg, WPARAM wParam, LPARAM lParam)
	{
		if (_rshellfolderviewcb == NULL)
			return E_FAIL;

		return _rshellfolderviewcb->MessageSFVCB(uMsg, wParam, lParam);
	}


	// Purpose: function is used when shellfolder view is created to 
	//          obtain something.. [UNDOCUMENTED]
	HRESULT GetUndocumentedSetting()
	{
		return CallCB(SFVM_UNDOCUMENTED78, 0, 0);
	}


	// Purpose: used during startup to retrieve sorting defauls.
	HRESULT GetSortDefaults(int* piDirection, int* piColumn)
	{
		CallCB(SFVM_GETSORTDEFAULTS,
			reinterpret_cast<WPARAM>(piDirection), reinterpret_cast<LPARAM>(piColumn));
	}


	HRESULT GetViewData()
	{
		return CallCB(SFVM_GET_VIEW_DATA, 0, 0);
	}


	HRESULT GetShowWebView()
	{
		return CallCB(SFVM_SHOWWEBVIEW, 0, 0);
	}


	HRESULT GetBackGroundEnum()
	{
		return CallCB(SFVM_BACKGROUNDENUM, 0, 0);
	}


	HRESULT GetColumnStream()
	{
		return CallCB(SFVM_GETCOLUMNSTREAM, 0, 0);
	}


	HRESULT GetWebViewLayout()
	{
		return CallCB(SFVM_GET_WEBVIEW_LAYOUT, 0, 0);
	}


	HRESULT GetCustomViewInfo()
	{
		return CallCB(SFVM_GET_CUSTOMVIEWINFO, 0, 0);
	}


	HRESULT FindItem()
	{
		return CallCB(SFVM_FINDITEM, 0, 0);
	}


	void NotifyWndMain(HWND hwnd)
	{
		CallCB(SFVM_WNDMAIN, hwnd, 0);
	}


	void NotifyWndSize()
	{
		CallCB(SFVM_SIZE, 0, 0);
	}


	void NotifyEnumeratedItems()
	{
		CallCB(SFVM_ENUMERATEDITEMS, 0, 0);
	}


	void NotifyWindowCreated(HWND hwndView)
	{
		CallCB(SFVM_WINDOWCREATED, hwndView, 0);
	}


	void NotifyWindowClosing()
	{
		CallCB(SFVM_WINDOWCLOSING, 0, 0);
	}


	void NotifyRemovingObject()
	{
		CallCB(SFVM_REMOVINGOBJECT, 0, 0);
	}


	void NotifyViewDestruct()
	{
		CallCB(SFVM_VIEWRELEASE, 0, 0);
	}

private:
	CComPtr<IShellFolderViewCB> _rshellfolderviewcb;
};


class CDefviewEnumTask()
{
public:
	FillObjectsToDPA()
	{
		_callback.GetBackGroundEnum();

		//_callback. // enum done?
	}
};


class CViewState
{
public:
	void InitWithDefaults(const CCallback& callback)
	{
		GetDefaults(callback);
	}


	void GetDefaults(const CCallback& callback)
	{
		if (SUCCEEDED(callback.GetSortDefaults(&_iDirection, &_iColumn)))
			return;
	
		_iDirection = 0;// todo
		_iColumn = 0;
	}

	int _iDirection;
	int _iColumn;
};


class CContextMenuCB
{
	void CallBack()
	{
	}


	NotifyDfmCommand()
	{
		CallBack();
	}
}


class ATL_NO_VTABLE CDefView : public IShellViewImpl<CDefView>
{
public:
	DECLARE_NOT_AGGREGATABLE(CDefView)

	BEGIN_COM_MAP(CDefView)
		COM_INTERFACE_ENTRY(IShellView)
	END_COM_MAP()

	// COM_INTERFACE_ENTRY(IOleWindow) ?


	static CComPtr<IShellView> CreateInstance(const SFV_CREATE* pcsfv)
	{
		CComObject<CDefView>* pinstance;
		RaiseExceptionIfFailed(
			CComObject<CDefView>::CreateInstance(&pinstance));

		CComPtr<IShellView> rshellview(pinstance);

		pinstance->Init(pcsfv);

		return rshellview;
	}


	CDefView()
	{
	}


	void Init(const SFV_CREATE* pcsfv)
	{
		_rshellfolder       = pcsfv->pshf;
		_rshellviewOuter    = pcsfv->psvOuter;
		_rshellfolderviewcb = pcsfv->psfvcb;
	}


	HRESULT CreateViewWindow(IShellView* psvPrevious,
	                         const FOLDERSETTINGS* pfs,
	                         IShellBrowser* psb,
	                         RECT* prcView,
	                         HWND* phWnd)
	{
		//ATLTRACENOTIMPL(_T("IShellViewImpl::CreateViewWindow"));
		SV2CVW2_PARAMS params;

		params.cbSize   = sizeof(params);
		params.psvPrev  = psvPrevious;
		params.pfs      = pfs;
		params.psbOwner = psb;
		params.prcView  = prcView;
		params.pvid     = NULL; // todo

		HRESULT hr = CreateViewWindow2(params);
		*phWnd = params.hwndView;
		return hr;
	}


	HRESULT CreateViewWindow2(SV2CVW2_PARAMS* pParams)
	{
		_callback.NotifyWndMain(0);

		FillObjectsToDPA();

		SwitchToViewFVM();

		_callback.NotifyWindowCreated();

		UpdateListviewColors();

		_rshellbrowser = pParams.psbOwner;
	}


	void GetView()
	{
		ViewSupported();
	}


	void AddColumns()
	{
		//_callback.//streams
	}


	void DestroyViewWindow()
	{
		_callback.NotifyWindowClosing();
	}

private:

	void ViewSupported()
	{
		GetSFVMViewState();
	}


	void GetSFVMViewState()
	{
		_callback.GetViewData();
	}


	void SwitchToViewFVM()
	{
		AddColumns();

		TryShowWebView();
	}


	void TryShowWebView()
	{
		_callback.GetWebViewLayout();
	}


	static void WndProc()
	{
		// pthis->WndProc();
	}


	void WndProc()
	{
		switch()
		{
			case 
				OnCreate();

			case 
				WndSize();

			case 
				OnSelectionChanged();
		}
	}


	void OnCreate()
	{
		ShouldShowWebView();
	}


	void WndSize()
	{
		_callback.NotifyWndSize()
	}


	void OnSelectionChanged()
	{
	}


	bool ShouldShowWebView()
	{
		_callback.GetShowWebView();
	}


	void FindItem()
	{
		_callback.FindItem();
	}


	void ExplorerCommand()
	{
		InvokeContextMenu();
	}


	void InvokeContextMenu()
	{
		_deffoldermenu.InvokeCommand(_callback);
	}

	//WndProc()
	//OnFSNotify()
	//AddOrUpdateItem()
	//UpdateStatusBar()
	//OnLVNotify()
	//Attributes()
	//IsImageMode()
	//SetSortFeedback()
	//SetDefaultViewSettings
	//ForwardMenuMessages
	//SetFolderColors
	//OnInitMenuPopup
	//OnClipboardChange

	// Member variables
	CComPtr<IShellFolder>       _rshellfolder;
	CComPtr<IShellView>         _rshellviewOuter;
	CComPtr<IShellFolderViewCB> _rshellfolderviewcb;
	CComPtr<IShellBrowser>      _rshellbrowser;
	ATL::CWindow                _window;
};

} // namespace MSF