/*
* A plugin for Miranda IM which displays web page text in a window Copyright
* (C) 2005 Vincent Joyce.
*
* Miranda IM: the free icq client for MS Windows  Copyright (C) 2000-2
* Richard Hughes, Roland Rabien & Tristan Van de Vreede
*
* 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.
*/

#include "stdafx.h"
#include "webview.h"

/*****************************************************************************/
INT_PTR CALLBACK DlgProcFind(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	static char     Searchstr[128];
	static int loc;
	static int oldloc;
	static int startposition;
	static int OLDstartposition;

	HWND ParentHwnd = GetParent(hwndDlg);

	switch (msg) {
	case WM_INITDIALOG:
		TranslateDialogDefault(hwndDlg);
		SetWindowLongPtr(hwndDlg, GWLP_USERDATA, lParam);
		SetWindowText(hwndDlg, TranslateT("Find"));
		SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, (LPARAM)LoadIcon(g_plugin.getInst(), MAKEINTRESOURCE(IDI_FIND)));
		return TRUE;

	case WM_COMMAND:
		switch (LOWORD(wParam)) {
		case IDC_OK: // find Next
			{
				char NewSearchstr[128];
				int location = 0;
				int startsel = 0, endsel = 0;
				char buff[MAXSIZE1];

				memset(&NewSearchstr, 0, sizeof(NewSearchstr));

				int len = GetWindowTextLength(GetDlgItem(ParentHwnd, IDC_DATA));

				char *tempbuffer = (char*)malloc(len + 2);

				GetDlgItemTextA(ParentHwnd, IDC_DATA, tempbuffer, len);
				strncpy(buff, tempbuffer, _countof(buff));
				free(tempbuffer);

				Filter(buff);
				CharUpperBuffA(buff, (int)mir_strlen(buff));

				GetDlgItemTextA(hwndDlg, IDC_FINDWHAT, NewSearchstr, _countof(NewSearchstr));
				CharUpperBuffA(NewSearchstr, (int)mir_strlen(NewSearchstr));

				OLDstartposition = startposition;

				if ((strstr(Searchstr, NewSearchstr)) != nullptr)
					startposition = loc + (int)mir_strlen(Searchstr);
				else {
					oldloc = 0;
					startposition = 0;
				}

				mir_strcpy(Searchstr, NewSearchstr);

				if (!(startposition > (int)mir_strlen(buff)))
					location = (strstr(buff + startposition, NewSearchstr)) - buff;

				oldloc = loc;
				loc = location;

				if (loc == 0) {
					ShowWindow(GetDlgItem(hwndDlg, IDC_SEARCH_COMPLETE), SW_SHOW);
					loc = (strstr(buff, NewSearchstr)) - buff;
					startsel = loc;
					endsel = loc + (int)mir_strlen(NewSearchstr);
					oldloc = 0;
					startposition = 0;
				}
				else {
					ShowWindow(GetDlgItem(hwndDlg, IDC_SEARCH_COMPLETE), SW_HIDE);
					startsel = loc;
					endsel = loc + (int)mir_strlen(NewSearchstr);
				}

				CHARRANGE sel2 = { startsel, endsel };
				SendDlgItemMessage(ParentHwnd, IDC_DATA, EM_EXSETSEL, 0, (LPARAM)&sel2);
				SetFocus(GetDlgItem(ParentHwnd, IDC_DATA));
			}
			return TRUE;

		case WM_DESTROY:
		case IDC_CANCEL:
			EnableWindow(GetDlgItem(ParentHwnd, IDC_FIND_BUTTON), 1);
			EnableWindow(ParentHwnd, 1);
			DestroyWindow(hwndDlg);
		}
		break;
	}
	return FALSE;
}

/*****************************************************************************/

static wchar_t tszSizeString[] = L"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

static MCONTACT FindContactByUrl(HWND hwndDlg)
{
	MCONTACT res = NULL;
	wchar_t urltext[300], titlebartxt[300];
	int contactcount = 0;

	GetDlgItemText(hwndDlg, IDC_OPEN_URL, urltext, _countof(urltext));
	GetWindowText(hwndDlg, titlebartxt, _countof(titlebartxt));

	for (auto &hContact : Contacts(MODULENAME)) {
		ptrW db1(g_plugin.getWStringA(hContact, URL_KEY));
		ptrW db2(g_plugin.getWStringA(hContact, PRESERVE_NAME_KEY));

		if (!mir_wstrcmp(urltext, db1) && !mir_wstrcmp(titlebartxt, db2)) {
			contactcount++;
			if (contactcount > 1) {
				MessageBox(nullptr, TranslateT("ERROR: You have two or more Webview contacts with the same URL and contact name."), _A2W(MODULENAME), MB_OK);
				return NULL;
			}
			res = hContact;
		}
	}
	return res;
}

INT_PTR CALLBACK DlgProcDisplayData(HWND hwndDlg, UINT msg, WPARAM wParam, LPARAM lParam)
{
	DBVARIANT dbv;
	RECT rc;
	wchar_t url[300];
	MCONTACT hContact;

	switch (msg) {
	case WM_INITDIALOG:
		TranslateDialogDefault(hwndDlg);
		{
			MCONTACT hContact2 = lParam;

			SetWindowLongPtr(hwndDlg, GWLP_USERDATA, (LONG_PTR)hContact2);
			WindowList_Add(hWindowList, hwndDlg, hContact2);

			url[0] = '\0';
			if (!g_plugin.getWString(hContact2, URL_KEY, &dbv)) {
				wcsncpy_s(url, dbv.pwszVal, _TRUNCATE);
				db_free(&dbv);
			}
			SetDlgItemText(hwndDlg, IDC_OPEN_URL, FixButtonText(url, _countof(url)));

			char preservename[100];
			if (!g_plugin.getString(hContact2, PRESERVE_NAME_KEY, &dbv)) {
				strncpy_s(preservename, _countof(preservename), dbv.pszVal, _TRUNCATE);
				db_free(&dbv);
			}
			else preservename[0] = 0;
			SetWindowTextA(hwndDlg, preservename);

			SendMessage(hwndDlg, WM_SETICON, ICON_SMALL, (LPARAM)LoadIcon(g_plugin.getInst(), MAKEINTRESOURCE(IDI_SITE)));

			// //////
			COLORREF colour = BackgoundClr;
			COLORREF txtcolor;
			SendDlgItemMessage(hwndDlg, IDC_DATA, EM_SETBKGNDCOLOR, 0, colour);

			SendDlgItemMessage(hwndDlg, IDC_UPDATE_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_UPDATE), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
			SendDlgItemMessage(hwndDlg, IDC_UPDATE_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Update data"), BATF_UNICODE);

			SendDlgItemMessage(hwndDlg, IDC_FIND_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_FIND), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
			SendDlgItemMessage(hwndDlg, IDC_FIND_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Find"), BATF_UNICODE);

			SendDlgItemMessage(hwndDlg, IDC_OPTIONS_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_OPTIONS), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
			SendDlgItemMessage(hwndDlg, IDC_OPTIONS_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Contact options"), BATF_UNICODE);

			SendDlgItemMessage(hwndDlg, IDC_ALERT_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_ALERT), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
			SendDlgItemMessage(hwndDlg, IDC_ALERT_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Alert options"), BATF_UNICODE);

			SendDlgItemMessage(hwndDlg, IDC_STOP, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_STOP), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
			SendDlgItemMessage(hwndDlg, IDC_STOP, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Stop processing"), BATF_UNICODE);

			SendDlgItemMessage(hwndDlg, IDC_OPEN_URL, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Click here to open this URL in a browser window."), BATF_UNICODE);

			if (!g_plugin.getByte(hContact2, ON_TOP_KEY)) {
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_UNSTICK), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Stick to the front"), BATF_UNICODE);
			}
			else {
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_STICK), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BUTTONADDTOOLTIP, (WPARAM)TranslateT("Disable stick to the front"), BATF_UNICODE);
			}

			SendDlgItemMessage(hwndDlg, IDC_DATA, WM_SETFONT, (WPARAM)h_font, 1);

			txtcolor = TextClr;

			SetDlgItemText(hwndDlg, IDC_DATA, L"");

			InvalidateRect(hwndDlg, nullptr, 1);

			SendDlgItemMessage(hwndDlg, IDC_DATA, EM_AUTOURLDETECT, 1, 0);
			int mask = (int)SendDlgItemMessage(hwndDlg, IDC_DATA, EM_GETEVENTMASK, 0, 0);

			SendDlgItemMessage(hwndDlg, IDC_DATA, EM_SETEVENTMASK, 0, mask | ENM_LINK | ENM_MOUSEEVENTS);

			SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BUTTONSETASFLATBTN, 0, 0);
			SendDlgItemMessage(hwndDlg, IDC_UPDATE_BUTTON, BUTTONSETASFLATBTN, 0, 0);
			SendDlgItemMessage(hwndDlg, IDC_FIND_BUTTON, BUTTONSETASFLATBTN, 0, 0);
			SendDlgItemMessage(hwndDlg, IDC_OPTIONS_BUTTON, BUTTONSETASFLATBTN, 0, 0);
			SendDlgItemMessage(hwndDlg, IDC_ALERT_BUTTON, BUTTONSETASFLATBTN, 0, 0);
			SendDlgItemMessage(hwndDlg, IDC_STOP, BUTTONSETASFLATBTN, 0, 0);

			SendDlgItemMessage(hwndDlg, IDC_OPEN_URL, BUTTONSETASFLATBTN, 0, 0);

			HDC hdc = GetDC(GetDlgItem(hwndDlg, IDC_STATUSBAR));
			SelectObject(hdc, (HFONT)SendDlgItemMessage(hwndDlg, IDC_STATUSBAR, WM_GETFONT, 0, 0));
			SIZE textSize;
			GetTextExtentPoint32(hdc, tszSizeString, _countof(tszSizeString), &textSize);
			int partWidth[2] = { textSize.cx, -1 };
			ReleaseDC(GetDlgItem(hwndDlg, IDC_STATUSBAR), hdc);

			SendDlgItemMessage(hwndDlg, IDC_STATUSBAR, SB_SETPARTS, _countof(partWidth), (LPARAM)partWidth);
			SendDlgItemMessage(hwndDlg, IDC_STATUSBAR, SB_SETTEXT, 1 | SBT_OWNERDRAW, 0);

			if (g_plugin.getByte(SAVE_INDIVID_POS_KEY, 0))
				Utils_RestoreWindowPosition(hwndDlg, hContact2, MODULENAME, "WV");
		}
		break;

	case WM_NOTIFY:
		switch (((NMHDR *)lParam)->code) {
		case EN_MSGFILTER:
			switch (((MSGFILTER *)lParam)->msg) {
			case WM_RBUTTONUP:
				{
					POINT  pt;
					CHARRANGE sel, all = { 0, -1 };

					HMENU hSubMenu = GetSubMenu(hMenu, 0);
					TranslateMenu(hSubMenu);
					SendMessage(((NMHDR *)lParam)->hwndFrom, EM_EXGETSEL, 0, (LPARAM)& sel);

					EnableMenuItem(hSubMenu, IDM_COPY, MF_ENABLED);
					EnableMenuItem(hSubMenu, IDM_CUT, MF_ENABLED);
					EnableMenuItem(hSubMenu, IDM_DELETE, MF_ENABLED);

					if (sel.cpMin == sel.cpMax) {
						EnableMenuItem(hSubMenu, IDM_COPY, MF_BYCOMMAND | MF_GRAYED);
						EnableMenuItem(hSubMenu, IDM_CUT, MF_BYCOMMAND | MF_GRAYED);
						EnableMenuItem(hSubMenu, IDM_DELETE, MF_BYCOMMAND | MF_GRAYED);
					}
					pt.x = (short)LOWORD(((ENLINK *)lParam)->lParam);
					pt.y = (short)HIWORD(((ENLINK *)lParam)->lParam);
					ClientToScreen(((NMHDR *)lParam)->hwndFrom, &pt);
					switch (TrackPopupMenu(hSubMenu, TPM_RETURNCMD, pt.x, pt.y, 0, hwndDlg, nullptr)) {
					case IDM_COPY:
						SendMessage(((NMHDR *)lParam)->hwndFrom, WM_COPY, 0, 0);
						break;

					case IDM_COPYALL:
						SendMessage(((NMHDR *)lParam)->hwndFrom, EM_EXSETSEL, 0, (LPARAM)& all);
						SendMessage(((NMHDR *)lParam)->hwndFrom, WM_COPY, 0, 0);
						SendMessage(((NMHDR *)lParam)->hwndFrom, EM_EXSETSEL, 0, (LPARAM)& sel);
						break;

					case IDM_SELECTALL:
						SendMessage(((NMHDR *)lParam)->hwndFrom, EM_EXSETSEL, 0, (LPARAM)& all);
						break;

					case IDM_CUT:
						SendMessage(((NMHDR *)lParam)->hwndFrom, WM_CUT, 0, 0);
						break;

					case IDM_PASTE:
						SendMessage(((NMHDR *)lParam)->hwndFrom, WM_PASTE, 0, 0);
						break;

					case IDM_DELETE:
						SendMessage(((NMHDR *)lParam)->hwndFrom, WM_CLEAR, 0, 0);
						break;

					case IDM_CLEAR_ALL:
						SetDlgItemTextA(hwndDlg, IDC_DATA, "");
						SetFocus(GetDlgItem(hwndDlg, IDC_DATA));
						break;
					}
				}
			}
			break;

		case EN_LINK:
			switch (((ENLINK *)lParam)->msg) {
			case WM_RBUTTONDOWN:
			case WM_LBUTTONUP:
				CHARRANGE sel;
				SendDlgItemMessage(hwndDlg, IDC_DATA, EM_EXGETSEL, 0, (LPARAM)& sel);
				if (sel.cpMin != sel.cpMax)
					break;

				TEXTRANGEA tr;
				tr.chrg = ((ENLINK *)lParam)->chrg;
				tr.lpstrText = (char*)malloc(tr.chrg.cpMax - tr.chrg.cpMin + 8);

				SendDlgItemMessage(hwndDlg, IDC_DATA, EM_GETTEXTRANGE, 0, (LPARAM)& tr);
				if (strchr(tr.lpstrText, '@') != nullptr && strchr(tr.lpstrText, ':') == nullptr && strchr(tr.lpstrText, '/') == nullptr) {
					memmove(tr.lpstrText + 7, tr.lpstrText, tr.chrg.cpMax - tr.chrg.cpMin + 1);
					memcpy(tr.lpstrText, "mailto:", 7);
				}

				Utils_OpenUrl(tr.lpstrText);
				SetFocus(GetDlgItem(hwndDlg, IDC_DATA));

				free(tr.lpstrText);
				break;
			}
		}
		break; // notify

	case WM_COMMAND:
		switch (LOWORD(wParam)) {
		case IDC_OPEN_URL:
			GetDlgItemText(hwndDlg, IDC_OPEN_URL, url, _countof(url));
			Utils_OpenUrlW(url);
			g_plugin.setWord(wParam, "Status", ID_STATUS_ONLINE);
			break;

		case IDC_UPDATE_BUTTON:
			if (hContact = FindContactByUrl(hwndDlg)) {
				EnableWindow(GetDlgItem(hwndDlg, IDC_UPDATE_BUTTON), 0);
				UpdateMenuCommand(wParam, lParam, hContact);
			}
			break;

		case IDC_STOP:
			if (hContact = FindContactByUrl(hwndDlg))
				g_plugin.setByte(hContact, STOP_KEY, 1);
			break;

		case IDC_STICK_BUTTON:
			if (hContact = FindContactByUrl(hwndDlg))
				OnTopMenuCommand(wParam, lParam, hContact);
			{
				wchar_t *ptszToolTip;
				HWND hTopmost;
				if (!g_plugin.getByte(hContact, ON_TOP_KEY, 0)) {
					hTopmost = HWND_NOTOPMOST;
					ptszToolTip = TranslateT("Stick to the front");
				}
				else {
					hTopmost = HWND_TOPMOST;
					ptszToolTip = TranslateT("Disable stick to the front");
				}
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadImage(g_plugin.getInst(), MAKEINTRESOURCE(IDI_UNSTICK), IMAGE_ICON, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), 0));
				SendDlgItemMessage(hwndDlg, IDC_STICK_BUTTON, BUTTONADDTOOLTIP, (WPARAM)ptszToolTip, BATF_UNICODE);
				SetWindowPos(hwndDlg, hTopmost, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
			}
			break;

		case IDC_FIND_BUTTON:
			{
				HWND hwndFind = CreateDialogParam(g_plugin.getInst(), MAKEINTRESOURCE(IDD_FIND), hwndDlg, DlgProcFind, (LPARAM)wParam);
				ShowWindow(hwndFind, SW_SHOW);
				EnableWindow(GetDlgItem(hwndDlg, IDC_FIND_BUTTON), 0);
			}
			break;

		case IDC_OPTIONS_BUTTON:
			if (hContact = FindContactByUrl(hwndDlg))
				DialogBoxParam(g_plugin.getInst(), MAKEINTRESOURCE(IDD_CONTACT_OPT), hwndDlg, DlgProcContactOpt, hContact);
			break;

		case IDC_ALERT_BUTTON:
			if (hContact = FindContactByUrl(hwndDlg))
				DialogBoxParam(g_plugin.getInst(), MAKEINTRESOURCE(IDD_ALRT_OPT), hwndDlg, DlgProcAlertOpt, hContact);
			break;

		case IDOK:
		case IDCANCEL:
			if (hwndDlg != nullptr)
				DestroyWindow(hwndDlg);
			return TRUE;
		}
		break;

	case WM_CLOSE:
		if (Yposition == -32000)
			Yposition = 100;

		if (Xposition == -32000)
			Xposition = 100;

		SavewinSettings();

		if (hContact = FindContactByUrl(hwndDlg))
			Utils_SaveWindowPosition(hwndDlg, hContact, MODULENAME, "WV");

		if (hwndDlg != nullptr)
			DestroyWindow(hwndDlg);
		return 0;

	case WM_DESTROY:
		WindowList_Remove(hWindowList, hwndDlg);
		return 0;

	case WM_SIZE:
		Utils_ResizeDialog(hwndDlg, g_plugin.getInst(), MAKEINTRESOURCEA(IDD_DISPLAY_DATA), DataDialogResize);
		InvalidateRect(hwndDlg, nullptr, TRUE);

		// global
		GetWindowRect(hwndDlg, &rc);
		Xposition = rc.left;
		Yposition = rc.top;
		WindowHeight = rc.bottom - rc.top;
		WindowWidth = rc.right - rc.left;
		break;

	case WM_MOVE:
		if (!IsIconic(hwndDlg) && !IsZoomed(hwndDlg)) {
			GetWindowRect(hwndDlg, &rc);
			// global
			Xposition = rc.left;
			Yposition = rc.top;
			WindowHeight = rc.bottom - rc.top;
			WindowWidth = rc.right - rc.left;

			if ((GetAsyncKeyState(VK_CONTROL) & 0x8000))
				break;

			ValidatePosition(hwndDlg);
		}
	}
	return FALSE;
}

/*****************************************************************************/

int DataDialogResize(HWND, LPARAM, UTILRESIZECONTROL *urc)
{
	switch (urc->wId) {
	case IDC_OPEN_URL:
		return RD_ANCHORX_WIDTH | RD_ANCHORY_TOP;
	case IDC_DATA:
		return RD_ANCHORX_WIDTH | RD_ANCHORY_HEIGHT;
	case IDC_STATUSBAR:
		return RD_ANCHORX_WIDTH | RD_ANCHORX_RIGHT;

	}
	return RD_ANCHORX_LEFT | RD_ANCHORY_TOP;
}

/*****************************************************************************/

void SavewinSettings(void)
{
	if (Yposition == -32000)
		Yposition = 100;

	if (Xposition == -32000)
		Xposition = 100;

	g_plugin.setDword(Xpos_WIN_KEY, Xposition);
	g_plugin.setDword(Ypos_WIN_KEY, Yposition);

	g_plugin.setDword(BG_COLOR_KEY, BackgoundClr);
	g_plugin.setDword(TXT_COLOR_KEY, TextClr);
	g_plugin.setDword(WIN_HEIGHT_KEY, WindowHeight);
	g_plugin.setDword(WIN_WIDTH_KEY, WindowWidth);

}

/*****************************************************************************/
void ValidatePosition(HWND)
{
	RECT r;
	SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);

	POINT pt = { 0, 0 };
	HMONITOR hMonitor = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST); // always 

	MONITORINFO monitorInfo;
	monitorInfo.cbSize = sizeof(MONITORINFO);
	if (GetMonitorInfo(hMonitor, &monitorInfo))
		memcpy(&r, &monitorInfo.rcMonitor, sizeof(RECT));

	// /window going off right of screen*
	if (Xposition + WindowWidth >= r.right)
		Xposition = r.right - WindowWidth;

	// window going off bottom of screen
	if (Yposition + WindowHeight >= r.bottom)
		Yposition = r.bottom - WindowHeight;

	// window going off left of screen
	if (Xposition >= r.right)
		Xposition = 0;
}