/*
 * astyle --force-indent=tab=4 --brackets=linux --indent-switches
 *		  --pad=oper --one-line=keep-blocks  --unpad=paren
 *
 * Miranda NG: the free IM client for Microsoft* Windows*
 *
 * Copyright 2000-2009 Miranda ICQ/IM project,
 * all portions of this codebase are copyrighted to the people
 * listed in contributors.txt.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * you should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * part of tabSRMM messaging plugin for Miranda.
 *
 * (C) 2005-2010 by silvercircle _at_ gmail _dot_ com and contributors
 *
 * - Windows 7 taskbar integration class
 * - Proxy window class, needed to support custom aero peek tab
 *   thumbnails
 * - Thumbnail classes to provide task bar thumbnails for Aero peek
 *   preview.
 */

#ifndef __TASKBAR_H
#define __TASKBAR_H

#define PROXYCLASSNAME  _T("TabSRMM_DWMProxy")
extern HINSTANCE g_hInst;

class CProxyWindow;

class CThumbBase {
public:
	CThumbBase				(const CProxyWindow* pWnd);
	virtual ~CThumbBase		();

	const HBITMAP			getHBM				() const { return(m_hbmThumb); }
	const bool				isValid				() const { return(m_isValid); }
	virtual void			setValid			(const bool fNewValid) { m_isValid = fNewValid; }
	virtual void			update				() = 0;

protected:
	HBITMAP					m_hbmThumb, m_hbmOld;
	const TWindowData*		m_dat;
	LONG					m_width, m_height;
	HDC						m_hdc;
	const CProxyWindow*		m_pWnd;
	RECT					m_rc, m_rcTop, m_rcBottom, m_rcIcon;
	DWORD					m_dtFlags;
	SIZE					m_sz;
	LONG					m_cx, m_cy;
	HFONT					m_hOldFont;

	virtual void			renderBase			();

private:
	virtual void			renderContent		() = 0;
	void					setupRect			();

private:
	bool					m_isValid;
};

class CThumbIM : public CThumbBase {

public:
	CThumbIM				(const CProxyWindow* pWnd);
	virtual ~CThumbIM		() {};
	void					update				();

private:
	void					renderContent		();
};

class CThumbMUC : public CThumbBase {

public:
	CThumbMUC				(const CProxyWindow* pWnd);
	virtual ~CThumbMUC		() {};
	void					update				();

private:
	void					renderContent		();
};

class CProxyWindow
{
public:
	CProxyWindow(const TWindowData *dat);
	~CProxyWindow();

	void					updateIcon			(const HICON hIcon) const;
	void					updateTitle			(const TCHAR *tszTitle) const;
	void					setBigIcon			(const HICON hIcon, bool fInvalidate = true);
	void					setOverlayIcon		(const HICON hIcon, bool fInvalidate = true);
	void					activateTab			() const;
	void					Invalidate			() const;
	const TWindowData*		getDat				() const { return(m_dat); }
	const LONG				getWidth			() const { return(m_width); }
	const LONG				getHeight			() const { return(m_height); }
	const HWND				getHwnd				() const { return(m_hwndProxy); }
	const HICON				getBigIcon			() const { return(m_hBigIcon); }
	const HICON				getOverlayIcon		() const { return(m_hOverlayIcon); }
	void					verifyDwmState		();

	static	LRESULT CALLBACK stubWndProc		(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
	static	void			add					(TWindowData *dat);
	static 	void			verify				(TWindowData *dat);

private:
	const TWindowData*		m_dat;
	HWND					m_hwndProxy;
	LONG					m_width, m_height;
	HICON					m_hBigIcon, m_hOverlayIcon;

	LRESULT CALLBACK		wndProc				(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
	void 					sendThumb			(LONG width, LONG height);
	void					sendPreview			();
	CThumbBase*				m_thumb;
};

class CTaskbarInteract
{
public:
	CTaskbarInteract()
	{
		m_pTaskbarInterface = 0;
		m_IconSize = 0;
		m_isEnabled = IsWinVer7Plus() ? true : false;

		if (m_isEnabled) {
			::CoCreateInstance(CLSID_TaskbarList, NULL, CLSCTX_ALL, IID_ITaskbarList3, (void**)&m_pTaskbarInterface);
			updateMetrics();
			if (0 == m_pTaskbarInterface)
				m_isEnabled = false;
		}

		/*
		 * register proxy window class
		 */
	    WNDCLASSEX			wcex = {0};
		wcex.cbSize         = sizeof(wcex);
		wcex.lpfnWndProc    = CProxyWindow::stubWndProc;
		wcex.hInstance      = g_hInst;
		wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
		wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
		wcex.lpszClassName  = PROXYCLASSNAME;
		::RegisterClassEx(&wcex);
	}

	~CTaskbarInteract()
	{
		if (m_isEnabled && m_pTaskbarInterface) {
			m_pTaskbarInterface->Release();
			m_pTaskbarInterface = 0;
			m_isEnabled = false;
		}
		::UnregisterClass(PROXYCLASSNAME, g_hInst);
	}
	const LONG		getIconSize						() const { return(m_IconSize); }
	const bool		haveAlwaysGroupingMode			() const { return(m_fHaveAlwaysGrouping); }

	bool 			setOverlayIcon					(HWND hwndDlg, LPARAM lParam) const;
	void			clearOverlayIcon				(HWND hwndDlg) const;
	bool			haveLargeIcons					();
	LONG			updateMetrics					();
	void			registerTab						(const HWND hwndTab, const HWND hwndContainer) const;
	void			unRegisterTab					(const HWND hwndTab) const;
	void			SetTabActive					(const HWND hwndTab, const HWND hwndGroup) const;

	//const TCHAR*	getFileNameFromWindow			(const HWND hWnd);
private:
	bool 										m_isEnabled;
	ITaskbarList3* 								m_pTaskbarInterface;
	bool										m_fHaveLargeicons;
	bool										m_fHaveAlwaysGrouping;
	LONG										m_IconSize;
};

extern CTaskbarInteract* Win7Taskbar;

#endif /* __TASKBAR_H */