/*
 * astyle --force-indent=tab=4 --brackets=linux --indent-switches
 *		  --pad=oper --one-line=keep-blocks  --unpad=paren
 *
 * Miranda IM: the free IM client for Microsoft* Windows*
 *
 * Copyright 2000-2010 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 clist_nicer plugin for Miranda.
 *
 * (C) 2005-2010 by silvercircle _at_ gmail _dot_ com and contributors
 *
 * $Id: clistmod.cpp 12978 2010-10-17 06:50:51Z silvercircle $
 *
 */

#include <commonheaders.h>

BOOL (WINAPI *MySetProcessWorkingSetSize)(HANDLE, SIZE_T, SIZE_T) = 0;

extern int AddEvent(WPARAM wParam, LPARAM lParam);
extern int RemoveEvent(WPARAM wParam, LPARAM lParam);

int InitCustomMenus(void);
void UninitCustomMenus(void);
INT_PTR GetContactStatusMessage(WPARAM wParam, LPARAM lParam);
void TrayIconUpdateBase(const char *szChangedProto);
int EventsProcessContactDoubleClick(HANDLE hContact);
int SetHideOffline(WPARAM wParam, LPARAM lParam);

extern HIMAGELIST hCListImages;

extern int       g_maxStatus;
extern HANDLE    hSvc_GetContactStatusMsg;
extern ImageItem *g_CLUIImageItem;

static INT_PTR GetStatusMode(WPARAM wParam, LPARAM lParam)
{
	return(g_maxStatus == ID_STATUS_OFFLINE ? pcli->currentDesiredStatusMode : g_maxStatus);
}

extern int ( *saveIconFromStatusMode )( const char *szProto, int status, HANDLE hContact );

int IconFromStatusMode(const char *szProto, int status, HANDLE hContact, HICON *phIcon)
{
	char *szFinalProto;
	int finalStatus;

	if (szProto != NULL && !strcmp(szProto, cfg::dat.szMetaName) && cfg::dat.bMetaAvail && hContact != 0 && !(cfg::dat.dwFlags & CLUI_USEMETAICONS)) {
		HANDLE hSubContact = (HANDLE) CallService(MS_MC_GETMOSTONLINECONTACT, (WPARAM) hContact, 0);
		szFinalProto = (char*) CallService(MS_PROTO_GETCONTACTBASEPROTO, (WPARAM) hSubContact, 0);
		finalStatus = (status == 0) ? (WORD) cfg::getWord(hSubContact, szFinalProto, "Status", ID_STATUS_OFFLINE) : status;
	} else {
		szFinalProto = (char*) szProto;
		finalStatus = status;
	}

	if (status >= ID_STATUS_CONNECTING && status < ID_STATUS_OFFLINE && phIcon != NULL) {
		if (szProto) {
			char szBuf[128];
			mir_snprintf(szBuf, 128, "%s_conn", szProto);
			*phIcon = (HICON)CallService(MS_SKIN2_GETICON, 0, (LPARAM)szBuf);
		}
	}
	return saveIconFromStatusMode(szFinalProto, finalStatus, hContact);
}

static int MenuItem_LockAvatar(WPARAM wParam, LPARAM lParam)
{
	return 0;
}

static int ContactListShutdownProc(WPARAM wParam, LPARAM lParam)
{
	UninitCustomMenus();
	return 0;
}

int LoadContactListModule(void)
{
	HookEvent(ME_SYSTEM_SHUTDOWN, ContactListShutdownProc);
	CreateServiceFunction(MS_CLIST_GETSTATUSMODE, GetStatusMode);

	hSvc_GetContactStatusMsg = CreateServiceFunction("CList/GetContactStatusMsg", GetContactStatusMessage);
	InitCustomMenus();
	MySetProcessWorkingSetSize = (BOOL(WINAPI *)(HANDLE, SIZE_T, SIZE_T))GetProcAddress(GetModuleHandleA("kernel32"), "SetProcessWorkingSetSize");
	return 0;
}

/*
Begin of Hrk's code for bug
*/
#define GWVS_HIDDEN 1
#define GWVS_VISIBLE 2
#define GWVS_COVERED 3
#define GWVS_PARTIALLY_COVERED 4

int GetWindowVisibleState(HWND hWnd, int iStepX, int iStepY)
{
	RECT rc = {0}, rcUpdate = {0};
	POINT pt = {0};
	register int i = 0, j = 0, width = 0, height = 0, iCountedDots = 0, iNotCoveredDots = 0;
	BOOL bPartiallyCovered = FALSE;
	HWND hAux = 0;

	if (hWnd == NULL) {
		SetLastError(0x00000006); //Wrong handle
		return -1;
	}
	//Some defaults now. The routine is designed for thin and tall windows.

	if (IsIconic(hWnd) || !IsWindowVisible(hWnd))
		return GWVS_HIDDEN;
	else {
		HRGN rgn = 0;
		POINT ptOrig;
        RECT  rcClient;
		int clip = (int)cfg::dat.bClipBorder;

        GetClientRect(hWnd, &rcClient);
        ptOrig.x = ptOrig.y = 0;
        ClientToScreen(hWnd, &ptOrig);
        rc.left = ptOrig.x;
        rc.top = ptOrig.y;
        rc.right = rc.left + rcClient.right;
        rc.bottom = rc.top + rcClient.bottom;

		//GetWindowRect(hWnd, &rc);
		width = rc.right - rc.left;
		height = rc.bottom - rc.top;

		if (iStepX <= 0)
			iStepX = 4;
		if (iStepY <= 0)
			iStepY = 16;

		/*
		 * use a rounded clip region to determine which pixels are covered
		 * this will avoid problems with certain XP themes which are using transparency for rounded
		 * window frames (reluna being one popular example).

		 * the radius of 8 should be sufficient for most themes as they usually don't use bigger
		 * radii.
		 * also, clip at least 2 pixels from the border (same reason)
		 */

        if (g_CLUIImageItem)
            clip = 5;
        else
            clip = 0;
        //clip = max(clip, DBGetContactSettingByte(NULL, "CLUI", "ignoreframepixels", 2));
		//rgn = CreateRoundRectRgn(rc.left + clip, rc.top + clip, rc.right - clip, rc.bottom - clip, 10 + clip, 10 + clip);
        //rgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
		//for (i = rc.top + 3 + clip; i < rc.bottom - 3 - clip; i += (height / iStepY)) {
        for (i = rc.top + clip; i < rc.bottom; i += (height / iStepY)) {
			pt.y = i;
			//for (j = rc.left + 3 + clip; j < rc.right - 3 - clip; j += (width / iStepX)) {
            for (j = rc.left + clip; j < rc.right; j += (width / iStepX)) {
				/*if (rgn) {
					ptTest.x = j;
					ptTest.y = i;
					if (!PtInRegion(rgn, ptTest.x, ptTest.y)) {
						continue;
					}
				}*/
				pt.x = j;
				hAux = WindowFromPoint(pt);
				while (GetParent(hAux) != NULL)
					hAux = GetParent(hAux);
				if (hAux != hWnd && hAux) //There's another window!
					bPartiallyCovered = TRUE;
				else
					iNotCoveredDots++; //Let's count the not covered dots.
				iCountedDots++; //Let's keep track of how many dots we checked.
			}
		}
		if (rgn)
			DeleteObject(rgn);

		if (iNotCoveredDots == iCountedDots) //Every dot was not covered: the window is visible.
			return GWVS_VISIBLE;
		else if (iNotCoveredDots == 0) //They're all covered!
			return GWVS_COVERED;
		else //There are dots which are visible, but they are not as many as the ones we counted: it's partially covered.
			return GWVS_PARTIALLY_COVERED;
	}
}

int ShowHide(WPARAM wParam, LPARAM lParam)
{
	BOOL bShow = FALSE;

	int iVisibleState = pcli->pfnGetWindowVisibleState(pcli->hwndContactList, 0, 0);

	if (IsIconic(pcli->hwndContactList)) {
		SendMessage(pcli->hwndContactList, WM_SYSCOMMAND, SC_RESTORE, 0);
		bShow = TRUE;
	}
	else {
		switch (iVisibleState) {
			case GWVS_PARTIALLY_COVERED:
				//If we don't want to bring it to top, we can use a simple break. This goes against readability ;-) but the comment explains it.
				if (!cfg::getByte("CList", "BringToFront", SETTING_BRINGTOFRONT_DEFAULT))
					break;
			case GWVS_COVERED:     //Fall through (and we're already falling)
			case GWVS_HIDDEN:
				bShow = TRUE;
				break;
			case GWVS_VISIBLE:     //This is not needed, but goes for readability.
				bShow = FALSE;
				break;
			case -1:               //We can't get here, both cli.hwndContactList and iStepX and iStepY are right.
				return 0;
		}
	}

	if (bShow == TRUE) {
		RECT rcWindow;

		SetWindowPos(pcli->hwndContactList, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE | SWP_NOREDRAW | SWP_NOSENDCHANGING | SWP_NOCOPYBITS);
		if (!cfg::getByte("CList", "OnTop", SETTING_ONTOP_DEFAULT))
			SetWindowPos(pcli->hwndContactList, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOREDRAW | SWP_NOSENDCHANGING | SWP_NOCOPYBITS);
		SetForegroundWindow(pcli->hwndContactList);
		//SetActiveWindow(pcli->hwndContactList);
		ShowWindow(pcli->hwndContactList, SW_SHOW);
		cfg::writeByte("CList", "State", SETTING_STATE_NORMAL);

		GetWindowRect(pcli->hwndContactList, &rcWindow);
		if (Utils_AssertInsideScreen(&rcWindow) == 1)
		{
			MoveWindow(pcli->hwndContactList, rcWindow.left, rcWindow.top, 
				rcWindow.right - rcWindow.left, rcWindow.bottom - rcWindow.top, TRUE);
		}
	}
	else {                      //It needs to be hidden
		ShowWindow(pcli->hwndContactList, SW_HIDE);
		cfg::writeByte("CList", "State", SETTING_STATE_HIDDEN);
		if (MySetProcessWorkingSetSize != NULL && cfg::getByte("CList", "DisableWorkingSet", 1))
			MySetProcessWorkingSetSize(GetCurrentProcess(), -1, -1);
	}
	return 0;
}