FreeRDP/client/X11/xf_window.c

/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * X11 Windows
 *
 * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 * Copyright 2012 HP Development Company, LLC 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdarg.h>
#include <unistd.h>
#include <sys/types.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>

#include <sys/shm.h>
#include <sys/ipc.h>

#include <freerdp/rail.h>
#include <freerdp/utils/rail.h>

#ifdef WITH_XEXT
#include <X11/extensions/shape.h>
#endif

#include "FreeRDP_Icon_256px.h"
#define xf_icon_prop FreeRDP_Icon_256px_prop

#include "xf_window.h"

/* Extended Window Manager Hints: http://standards.freedesktop.org/wm-spec/wm-spec-1.3.html */

/* bit definitions for MwmHints.flags */
#define MWM_HINTS_FUNCTIONS     (1L << 0)
#define MWM_HINTS_DECORATIONS   (1L << 1)
#define MWM_HINTS_INPUT_MODE    (1L << 2)
#define MWM_HINTS_STATUS        (1L << 3)

/* bit definitions for MwmHints.functions */
#define MWM_FUNC_ALL            (1L << 0)
#define MWM_FUNC_RESIZE         (1L << 1)
#define MWM_FUNC_MOVE           (1L << 2)
#define MWM_FUNC_MINIMIZE       (1L << 3)
#define MWM_FUNC_MAXIMIZE       (1L << 4)
#define MWM_FUNC_CLOSE          (1L << 5)

/* bit definitions for MwmHints.decorations */
#define MWM_DECOR_ALL           (1L << 0)
#define MWM_DECOR_BORDER        (1L << 1)
#define MWM_DECOR_RESIZEH       (1L << 2)
#define MWM_DECOR_TITLE         (1L << 3)
#define MWM_DECOR_MENU          (1L << 4)
#define MWM_DECOR_MINIMIZE      (1L << 5)
#define MWM_DECOR_MAXIMIZE      (1L << 6)

#define PROP_MOTIF_WM_HINTS_ELEMENTS	5

/* to be accessed by gstreamer plugin */
#define SHARED_MEM_KEY 7777

struct _PropMotifWmHints
{
	unsigned long flags;
	unsigned long functions;
	unsigned long decorations;
	long inputMode;
	unsigned long status;
};
typedef struct _PropMotifWmHints PropMotifWmHints;

/**
 * Post an event from the client to the X server
 */
void xf_SendClientEvent(xfInfo* xfi, xfWindow* window, Atom atom, unsigned int numArgs, ...)
{
       XEvent xevent;
       unsigned int i;
       va_list argp;

       va_start(argp, numArgs);

       xevent.xclient.type = ClientMessage;
       xevent.xclient.serial = 0;
       xevent.xclient.send_event = False;
       xevent.xclient.display = xfi->display;
       xevent.xclient.window = window->handle;
       xevent.xclient.message_type = atom;
       xevent.xclient.format = 32;

       for (i=0; i<numArgs; i++)
       {
               xevent.xclient.data.l[i] = va_arg(argp, int);
       }

       DEBUG_X11("Send ClientMessage Event: wnd=0x%04X", (unsigned int) xevent.xclient.window);
       XSendEvent(xfi->display, RootWindowOfScreen(xfi->screen), False, 
		SubstructureRedirectMask | SubstructureNotifyMask, &xevent);
       XSync(xfi->display, False);

       va_end(argp);
}

void xf_SetWindowFullscreen(xfInfo* xfi, xfWindow* window, BOOL fullscreen)
{
	if (fullscreen)
	{
		xf_SetWindowDecorations(xfi, window, FALSE);

                XMoveResizeWindow(xfi->display, window->handle, 0, 0, window->width, window->height);
                XMapRaised(xfi->display, window->handle);

		window->fullscreen = TRUE;
	}
}

/* http://tronche.com/gui/x/xlib/window-information/XGetWindowProperty.html */

BOOL xf_GetWindowProperty(xfInfo* xfi, Window window, Atom property, int length,
		unsigned long* nitems, unsigned long* bytes, BYTE** prop)
{
	int status;
	Atom actual_type;
	int actual_format;

	if (property == None)
		return FALSE;

	status = XGetWindowProperty(xfi->display, window,
			property, 0, length, FALSE, AnyPropertyType,
			&actual_type, &actual_format, nitems, bytes, prop);

	if (status != Success)
		return FALSE;

	if (actual_type == None)
	{
		DEBUG_WARN("Property %lu does not exist", property);
		return FALSE;
	}

	return TRUE;
}

BOOL xf_GetCurrentDesktop(xfInfo* xfi)
{
	BOOL status;
	unsigned long nitems;
	unsigned long bytes;
	unsigned char* prop;

	status = xf_GetWindowProperty(xfi, DefaultRootWindow(xfi->display),
			xfi->_NET_CURRENT_DESKTOP, 1, &nitems, &bytes, &prop);

	if (status != TRUE) {
		return FALSE;
	}

	xfi->current_desktop = (int) *prop;
	free(prop);

	return TRUE;
}

BOOL xf_GetWorkArea(xfInfo* xfi)
{
	long* plong;
	BOOL status;
	unsigned long nitems;
	unsigned long bytes;
	unsigned char* prop;

	status = xf_GetCurrentDesktop(xfi);

	if (status != TRUE)
		return FALSE;

	status = xf_GetWindowProperty(xfi, DefaultRootWindow(xfi->display),
			xfi->_NET_WORKAREA, 32 * 4, &nitems, &bytes, &prop);

	if (status != TRUE)
		return FALSE;

	if ((xfi->current_desktop * 4 + 3) >= nitems) {
		free(prop);
		return FALSE;
	}

	plong = (long*) prop;

	xfi->workArea.x = plong[xfi->current_desktop * 4 + 0];
	xfi->workArea.y = plong[xfi->current_desktop * 4 + 1];
	xfi->workArea.width = plong[xfi->current_desktop * 4 + 2];
	xfi->workArea.height = plong[xfi->current_desktop * 4 + 3];
	free(prop);

	return TRUE;
}

void xf_SetWindowDecorations(xfInfo* xfi, xfWindow* window, BOOL show)
{
	PropMotifWmHints hints;

	hints.decorations = (show) ? MWM_DECOR_ALL : 0;
	hints.functions = MWM_FUNC_ALL ; 
	hints.flags = MWM_HINTS_DECORATIONS | MWM_HINTS_FUNCTIONS;
	hints.inputMode = 0;
	hints.status = 0;

	XChangeProperty(xfi->display, window->handle, xfi->_MOTIF_WM_HINTS, xfi->_MOTIF_WM_HINTS, 32,
		PropModeReplace, (BYTE*) &hints, PROP_MOTIF_WM_HINTS_ELEMENTS);
}

void xf_SetWindowUnlisted(xfInfo* xfi, xfWindow* window)
{
	Atom window_state[2];

	window_state[0] = xfi->_NET_WM_STATE_SKIP_PAGER;
	window_state[1] = xfi->_NET_WM_STATE_SKIP_TASKBAR;

	XChangeProperty(xfi->display, window->handle, xfi->_NET_WM_STATE,
		XA_ATOM, 32, PropModeReplace, (BYTE*) &window_state, 2);
}

void xf_SetWindowStyle(xfInfo* xfi, xfWindow* window, UINT32 style, UINT32 ex_style)
{
	Atom window_type;

	if (/*(ex_style & WS_EX_TOPMOST) ||*/ (ex_style & WS_EX_TOOLWINDOW))
	{
		/*
		 * Tooltips and menu items should be unmanaged windows
		 * (called "override redirect" in X windows parlance)
		 * If they are managed, there are issues with window focus that
		 * cause the windows to behave improperly.  For example, a mouse
		 * press will dismiss a drop-down menu because the RDP server
		 * sees that as a focus out event from the window owning the
		 * dropdown.
		 */
		XSetWindowAttributes attrs;
		attrs.override_redirect = True;
		XChangeWindowAttributes(xfi->display, window->handle, CWOverrideRedirect, &attrs);

		window->is_transient = TRUE;
		xf_SetWindowUnlisted(xfi, window);
		window_type = xfi->_NET_WM_WINDOW_TYPE_POPUP;
	}
	/*
	 * TOPMOST window that is not a toolwindow is treated like a regular window(ie. task manager).
	 * Want to do this here, since the window may have type WS_POPUP
	 */
	else if (ex_style & WS_EX_TOPMOST)
        {
                window_type = xfi->_NET_WM_WINDOW_TYPE_NORMAL;
        }
	else if (style & WS_POPUP)
	{
		/* this includes dialogs, popups, etc, that need to be full-fledged windows */
		window->is_transient = TRUE;
		window_type = xfi->_NET_WM_WINDOW_TYPE_DIALOG;
		xf_SetWindowUnlisted(xfi, window);
	}
	else
	{
		window_type = xfi->_NET_WM_WINDOW_TYPE_NORMAL;
	}

	XChangeProperty(xfi->display, window->handle, xfi->_NET_WM_WINDOW_TYPE,
		XA_ATOM, 32, PropModeReplace, (BYTE*) &window_type, 1);

}

void xf_SetWindowText(xfInfo *xfi, xfWindow* window, char *name)
{
	XStoreName(xfi->display, window->handle, name);
}

static void xf_SetWindowPID(xfInfo* xfi, xfWindow* window, pid_t pid)
{
	Atom am_wm_pid;

	if (pid == 0)
		pid = getpid();

	am_wm_pid = XInternAtom(xfi->display, "_NET_WM_PID", False);

	XChangeProperty(xfi->display, window->handle, am_wm_pid, XA_CARDINAL,
			32, PropModeReplace, (unsigned char *)&pid, 1);
}

xfWindow* xf_CreateDesktopWindow(xfInfo* xfi, char* name, int width, int height, BOOL decorations)
{
	xfWindow* window;
	XEvent xevent;

	window = (xfWindow*) xzalloc(sizeof(xfWindow));

	if (window != NULL)
	{
		int shmid;
		int input_mask;
		XClassHint* class_hints;

		window->width = width;
		window->height = height;
		window->fullscreen = FALSE;
		window->decorations = decorations;
		window->local_move.state = LMS_NOT_ACTIVE;
		window->is_mapped = FALSE;
		window->is_transient = FALSE;

		window->handle = XCreateWindow(xfi->display, RootWindowOfScreen(xfi->screen),
			xfi->workArea.x, xfi->workArea.y, xfi->workArea.width, xfi->workArea.height, 0, xfi->depth, InputOutput, xfi->visual,
			CWBackPixel | CWBackingStore | CWOverrideRedirect | CWColormap | 
			CWBorderPixel | CWWinGravity | CWBitGravity, &xfi->attribs);

		shmid = shmget(SHARED_MEM_KEY, sizeof(int), IPC_CREAT | 0666);

		if (shmid < 0)
		{
			DEBUG_X11("xf_CreateDesktopWindow: failed to get access to shared memory - shmget()\n");
		}
		else
		{
			int* xfwin = shmat(shmid, NULL, 0);

			if (xfwin == (int*) -1)
			{
				DEBUG_X11("xf_CreateDesktopWindow: failed to assign pointer to the memory address - shmat()\n");
			}
			else
			{
				*xfwin = (int) window->handle;
			}
		}

		class_hints = XAllocClassHint();

		if (class_hints != NULL)
		{
			class_hints->res_name = "xfreerdp";
			class_hints->res_class = "xfreerdp";
			XSetClassHint(xfi->display, window->handle, class_hints);
			XFree(class_hints);
		}

		xf_ResizeDesktopWindow(xfi, window, width, height);
		xf_SetWindowDecorations(xfi, window, decorations);
		xf_SetWindowPID(xfi, window, 0);

		input_mask =
			KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
			VisibilityChangeMask | FocusChangeMask | StructureNotifyMask |
			PointerMotionMask | ExposureMask | PropertyChangeMask;

		if (xfi->grab_keyboard)
			input_mask |= EnterWindowMask | LeaveWindowMask;

		XChangeProperty(xfi->display, window->handle, xfi->_NET_WM_ICON, XA_CARDINAL, 32,
				PropModeReplace, (BYTE*) xf_icon_prop, ARRAY_SIZE(xf_icon_prop));

		if (xfi->parent_window)
                        XReparentWindow(xfi->display, window->handle, xfi->parent_window, 0, 0);

		XSelectInput(xfi->display, window->handle, input_mask);
		XClearWindow(xfi->display, window->handle);
		XMapWindow(xfi->display, window->handle);

		/*
		 * NOTE: This must be done here to handle reparenting the window, 
		 * so that we dont miss the event and hang waiting for the next one
		 */
        	do
        	{
        	      XMaskEvent(xfi->display, VisibilityChangeMask, &xevent);
        	}
        	while (xevent.type != VisibilityNotify);

		/*
		 * The XCreateWindow call will start the window in the upper-left corner of our current
		 * monitor instead of the upper-left monitor for remote app mode(which uses all monitors).
		 * This extra call after the window is mapped will position the login window correctly
		 */

		if (xfi->instance->settings->remote_app)
                        XMoveWindow(xfi->display, window->handle, 0, 0);

	}

	xf_SetWindowText(xfi, window, name);

	return window;
}

void xf_ResizeDesktopWindow(xfInfo* xfi, xfWindow* window, int width, int height)
{
	XSizeHints* size_hints;

	size_hints = XAllocSizeHints();

	if (size_hints)
	{
		size_hints->flags = PMinSize | PMaxSize;
		size_hints->min_width = size_hints->max_width = xfi->width;
		size_hints->min_height = size_hints->max_height = xfi->height;
		XSetWMNormalHints(xfi->display, window->handle, size_hints);
		XResizeWindow(xfi->display, window->handle, xfi->width, xfi->height);
		XFree(size_hints);
	}
}

void xf_FixWindowCoordinates(xfInfo* xfi, int* x, int* y, int* width, int* height)
{
	int vscreen_width;
	int vscreen_height;

	vscreen_width = xfi->vscreen.area.right - xfi->vscreen.area.left + 1;
	vscreen_height = xfi->vscreen.area.bottom - xfi->vscreen.area.top + 1;

	if (*width < 1) 
	{
		*width = 1;
	}
	if (*height < 1)
	{
		*height = 1;
	}
	if (*x < xfi->vscreen.area.left)
	{
		*width += *x;
		*x = xfi->vscreen.area.left;
	}
	if (*y < xfi->vscreen.area.top)
	{
		*height += *y;
		*y = xfi->vscreen.area.top;
	}
	if (*width > vscreen_width)
	{
		*width = vscreen_width;
	}
	if (*height > vscreen_height)
	{
		*height = vscreen_height;
	}
}

char rail_window_class[] = "RAIL:00000000";

xfWindow* xf_CreateWindow(xfInfo* xfi, rdpWindow* wnd, int x, int y, int width, int height, UINT32 id)
{
	XGCValues gcv;
	int input_mask;
	xfWindow* window;
	XWMHints* InputModeHint;
	XClassHint* class_hints;

	window = (xfWindow*) xzalloc(sizeof(xfWindow));

	xf_FixWindowCoordinates(xfi, &x, &y, &width, &height);

	window->left = x;
	window->top = y;
	window->right = x + width - 1;
	window->bottom = y + height - 1;
	window->width = width;
	window->height = height;

	/* this window need decorations
	   the WS_EX_APPWINDOW is used to tell the client to use local decorations
	   only sent from xrdp */
	window->decorations = (wnd->extendedStyle & WS_EX_APPWINDOW) ? TRUE : FALSE;
	window->fullscreen = FALSE;
	window->window = wnd;
	window->local_move.state = LMS_NOT_ACTIVE;
	window->is_mapped = FALSE;
	window->is_transient = FALSE;
	window->rail_state = 0;
        window->rail_ignore_configure = FALSE;

	window->handle = XCreateWindow(xfi->display, RootWindowOfScreen(xfi->screen),
		x, y, window->width, window->height, 0, xfi->depth, InputOutput, xfi->visual,
		CWBackPixel | CWBackingStore | CWOverrideRedirect | CWColormap | 
		CWBorderPixel | CWWinGravity | CWBitGravity, &xfi->attribs);

	DEBUG_X11_LMS("Create window=0x%X rc={l=%d t=%d r=%d b=%d} w=%d h=%d  rdp=0x%X",
			(UINT32) window->handle, window->left, window->top, window->right, window->bottom,
			window->width, window->height, wnd->windowId);

	memset(&gcv, 0, sizeof(gcv));
	window->gc = XCreateGC(xfi->display, window->handle, GCGraphicsExposures, &gcv);

	class_hints = XAllocClassHint();

	if (class_hints != NULL)
	{
		char* class;
		class = malloc(sizeof(rail_window_class));
		snprintf(class, sizeof(rail_window_class), "RAIL:%08X", id);
		class_hints->res_name = "RAIL";
		class_hints->res_class = class;
		XSetClassHint(xfi->display, window->handle, class_hints);
		XFree(class_hints);
		free(class);
	}

	/* Set the input mode hint for the WM */
        InputModeHint = XAllocWMHints();
        InputModeHint->flags = (1L << 0);
        InputModeHint->input = True;
        XSetWMHints(xfi->display, window->handle, InputModeHint);
        XFree(InputModeHint);

	XSetWMProtocols(xfi->display, window->handle, &(xfi->WM_DELETE_WINDOW), 1);

	input_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask |
        	ButtonReleaseMask | EnterWindowMask | LeaveWindowMask | 
		PointerMotionMask | Button1MotionMask | Button2MotionMask | 
		Button3MotionMask | Button4MotionMask | Button5MotionMask |
                ButtonMotionMask | KeymapStateMask | ExposureMask | 
		VisibilityChangeMask | StructureNotifyMask | SubstructureNotifyMask | 
		SubstructureRedirectMask | FocusChangeMask | PropertyChangeMask |
                ColormapChangeMask | OwnerGrabButtonMask;

	XSelectInput(xfi->display, window->handle, input_mask);

	xf_SetWindowDecorations(xfi, window, window->decorations);
	xf_SetWindowStyle(xfi, window, wnd->style, wnd->extendedStyle);
	xf_SetWindowPID(xfi, window, 0);
	xf_ShowWindow(xfi, window, WINDOW_SHOW);

	XClearWindow(xfi->display, window->handle);
	XMapWindow(xfi->display, window->handle);

	/* Move doesn't seem to work until window is mapped. */
	xf_MoveWindow(xfi, window, x, y, width, height);

	return window;
}

void xf_SetWindowMinMaxInfo(xfInfo* xfi, xfWindow* window,
		int maxWidth, int maxHeight, int maxPosX, int maxPosY,
		int minTrackWidth, int minTrackHeight, int maxTrackWidth, int maxTrackHeight)
{
	XSizeHints* size_hints;

	size_hints = XAllocSizeHints();

	if (size_hints)
	{
		size_hints->flags = PMinSize | PMaxSize | PResizeInc;

		size_hints->min_width  = minTrackWidth;
		size_hints->min_height = minTrackHeight;

		size_hints->max_width  = maxTrackWidth;
		size_hints->max_height = maxTrackHeight;

		/* to speedup window drawing we need to select optimal value for sizing step. */
		size_hints->width_inc = size_hints->height_inc = 1;

		XSetWMNormalHints(xfi->display, window->handle, size_hints);
		XFree(size_hints);
	}
}

void xf_StartLocalMoveSize(xfInfo* xfi, xfWindow* window, int direction, int x, int y)
{
	if (window->local_move.state != LMS_NOT_ACTIVE)
		return;

	DEBUG_X11_LMS("direction=%d window=0x%X rc={l=%d t=%d r=%d b=%d} w=%d h=%d   "
		"RDP=0x%X rc={l=%d t=%d} w=%d h=%d  mouse_x=%d mouse_y=%d",
		direction, (UINT32) window->handle, 
		window->left, window->top, window->right, window->bottom,
		window->width, window->height, window->window->windowId,
		window->window->windowOffsetX, window->window->windowOffsetY, 
		window->window->windowWidth, window->window->windowHeight, x, y);

	/*
	* Save original mouse location relative to root.  This will be needed
	* to end local move to RDP server and/or X server
	*/
	window->local_move.root_x = x; 
	window->local_move.root_y = y;
	window->local_move.state = LMS_STARTING;
	window->local_move.direction = direction;

	XUngrabPointer(xfi->display, CurrentTime);

	xf_SendClientEvent(xfi, window, 
			xfi->_NET_WM_MOVERESIZE, /* request X window manager to initiate a local move */
			5, /* 5 arguments to follow */
			x, /* x relative to root window */
			y, /* y relative to root window */
			direction, /* extended ICCM direction flag */
			1, /* simulated mouse button 1 */
		       	1); /* 1 == application request per extended ICCM */
}

void xf_EndLocalMoveSize(xfInfo *xfi, xfWindow *window)
{

	DEBUG_X11_LMS("state=%d window=0x%X rc={l=%d t=%d r=%d b=%d} w=%d h=%d  "
		"RDP=0x%X rc={l=%d t=%d} w=%d h=%d",
		window->local_move.state, 
		(UINT32) window->handle, window->left, window->top, window->right, window->bottom,
		window->width, window->height, window->window->windowId,
		window->window->windowOffsetX, window->window->windowOffsetY, 
		window->window->windowWidth, window->window->windowHeight);

	if (window->local_move.state == LMS_NOT_ACTIVE)
		return;

	if (window->local_move.state == LMS_STARTING)
	{
		/*
		 * The move never was property started. This can happen due to race
		 * conditions between the mouse button up and the communications to the
		 * RDP server for local moves. We must cancel the X window manager move.
		 * Per ICCM, the X client can ask to cancel an active move. 
		 */
		xf_SendClientEvent(xfi, window, 
			xfi->_NET_WM_MOVERESIZE, /* request X window manager to abort a local move */
			5, /* 5 arguments to follow */
			window->local_move.root_x, /* x relative to root window */
			window->local_move.root_y, /* y relative to root window */
			_NET_WM_MOVERESIZE_CANCEL, /* extended ICCM direction flag */
			1, /* simulated mouse button 1 */
		       	1); /* 1 == application request per extended ICCM */
	}

	window->local_move.state = LMS_NOT_ACTIVE;
}

void xf_MoveWindow(xfInfo* xfi, xfWindow* window, int x, int y, int width, int height)
{
	BOOL resize = FALSE;

	if ((width * height) < 1)
		return;

	if ((window->width != width) || (window->height != height))
		resize = TRUE;

	if (window->local_move.state == LMS_STARTING ||
		window->local_move.state == LMS_ACTIVE)
		return;

	DEBUG_X11_LMS("window=0x%X rc={l=%d t=%d r=%d b=%d} w=%u h=%u  "
		"new rc={l=%d t=%d r=%d b=%d} w=%u h=%u"
		"  RDP=0x%X rc={l=%d t=%d} w=%d h=%d",
		(UINT32) window->handle, window->left, window->top, 
		window->right, window->bottom, window->width, window->height,
		x, y, x + width -1, y + height -1, width, height, 
		window->window->windowId,
		window->window->windowOffsetX, window->window->windowOffsetY, 
		window->window->windowWidth, window->window->windowHeight);

	window->left = x;
	window->top = y;
	window->right = x + width - 1;
	window->bottom = y + height - 1;
	window->width = width;
	window->height = height;

	if (resize)
		XMoveResizeWindow(xfi->display, window->handle, x, y, width, height);
	else
		XMoveWindow(xfi->display, window->handle, x, y);

	xf_UpdateWindowArea(xfi, window, 0, 0, width, height);
}

void xf_ShowWindow(xfInfo* xfi, xfWindow* window, BYTE state)
{
	switch (state)
	{
		case WINDOW_HIDE:
			XWithdrawWindow(xfi->display, window->handle, xfi->screen_number);
			break;

		case WINDOW_SHOW_MINIMIZED:
			XIconifyWindow(xfi->display, window->handle, xfi->screen_number);
			break;

		case WINDOW_SHOW_MAXIMIZED:
			/* Set the window as maximized */
			xf_SendClientEvent(xfi, window, xfi->_NET_WM_STATE, 4, 1,
					XInternAtom(xfi->display, "_NET_WM_STATE_MAXIMIZED_VERT", False),
					XInternAtom(xfi->display, "_NET_WM_STATE_MAXIMIZED_HORZ", False), 0);
			
			/*
			 * This is a workaround for the case where the window is maximized locally before the rail server is told to maximize
			 * the window, this appears to be a race condition where the local window with incomplete data and once the window is
			 * actually maximized on the server - an update of the new areas may not happen. So, we simply to do a full update of
			 * the entire window once the rail server notifies us that the window is now maximized.
			 */

			if (window->rail_state == WINDOW_SHOW_MAXIMIZED)
                               xf_UpdateWindowArea(xfi, window, 0, 0, window->window->windowWidth, window->window->windowHeight);
			break;

		case WINDOW_SHOW:
			/* Ensure the window is not maximized */
			xf_SendClientEvent(xfi, window, xfi->_NET_WM_STATE, 4, 0,
					XInternAtom(xfi->display, "_NET_WM_STATE_MAXIMIZED_VERT", False),
					XInternAtom(xfi->display, "_NET_WM_STATE_MAXIMIZED_HORZ", False), 0);
			
			/*
			 * Ignore configure requests until both the Maximized properties have been processed
			 * to prevent condition where WM overrides size of request due to one or both of these properties
			 * still being set - which causes a position adjustment to be sent back to the server
			 * thus causing the window to not return to its original size
			 */

			if (window->rail_state == WINDOW_SHOW_MAXIMIZED)
                               window->rail_ignore_configure = TRUE;
		

			if (window->is_transient)
			{
				xf_SetWindowUnlisted(xfi, window);
			}
			break;
	}

	/* Save the current rail state of this window */
	window->rail_state = state;
	
	XFlush(xfi->display);
}

void xf_SetWindowIcon(xfInfo* xfi, xfWindow* window, rdpIcon* icon)
{
	int x, y;
	int pixels;
	int propsize;
	long* propdata;
	long* dstp;
	UINT32* srcp;

	if (icon->big != TRUE)
		return;

	pixels = icon->entry->width * icon->entry->height;
	propsize = 2 + pixels;
	propdata = malloc(propsize * sizeof(long));

	propdata[0] = icon->entry->width;
	propdata[1] = icon->entry->height;
	dstp = &(propdata[2]);
	srcp = (UINT32*) icon->extra;

	for (y = 0; y < icon->entry->height; y++)
	{
		for (x = 0; x < icon->entry->width; x++)
		{
			*dstp++ = *srcp++;
		}
	}

	XChangeProperty(xfi->display, window->handle, xfi->_NET_WM_ICON, XA_CARDINAL, 32,
		PropModeReplace, (BYTE*) propdata, propsize);

	XFlush(xfi->display);
}

void xf_SetWindowRects(xfInfo* xfi, xfWindow* window, RECTANGLE_16* rects, int nrects)
{
	int i;
	XRectangle* xrects;

	if (nrects == 0) 
		return;

	xrects = malloc(sizeof(XRectangle) * nrects);

	for (i = 0; i < nrects; i++)
	{
		xrects[i].x = rects[i].left;
		xrects[i].y = rects[i].top;
		xrects[i].width = rects[i].right - rects[i].left;
		xrects[i].height = rects[i].bottom - rects[i].top;
	}

#ifdef WITH_XEXT
	/*
	 * This is currently unsupported with the new logic to handle window placement with VisibleOffset variables
	 * XShapeCombineRectangles(xfi->display, window->handle, ShapeBounding, 0, 0, xrects, nrects, ShapeSet, 0);
	 */
#endif

	free(xrects);
}

void xf_SetWindowVisibilityRects(xfInfo* xfi, xfWindow* window, RECTANGLE_16* rects, int nrects)
{
	int i;
	XRectangle* xrects;

	if (nrects == 0) 
		return;

	xrects = malloc(sizeof(XRectangle) * nrects);

	for (i = 0; i < nrects; i++)
	{
		xrects[i].x = rects[i].left;
		xrects[i].y = rects[i].top;
		xrects[i].width = rects[i].right - rects[i].left;
		xrects[i].height = rects[i].bottom - rects[i].top;
	}

#ifdef WITH_XEXT
	/*
	 * This is currently unsupported with the new logic to handle window placement with VisibleOffset variables
	 * XShapeCombineRectangles(xfi->display, window->handle, ShapeBounding, 0, 0, xrects, nrects, ShapeSet, 0);
	 */
#endif

	free(xrects);
}

void xf_UpdateWindowArea(xfInfo* xfi, xfWindow* window, int x, int y, int width, int height)
{
	int ax, ay;
	rdpWindow* wnd;
	wnd = window->window;

	/* Remote app mode uses visibleOffset instead of windowOffset */

	if (!xfi->remote_app)
	{
		ax = x + wnd->windowOffsetX;
	        ay = y + wnd->windowOffsetY;	

		if (ax + width > wnd->windowOffsetX + wnd->windowWidth)
			width = (wnd->windowOffsetX + wnd->windowWidth - 1) - ax;

		if (ay + height > wnd->windowOffsetY + wnd->windowHeight)
			height = (wnd->windowOffsetY + wnd->windowHeight - 1) - ay;
	}
	else
	{
		ax = x + wnd->visibleOffsetX;
                ay = y + wnd->visibleOffsetY;

		if (ax + width > wnd->visibleOffsetX + wnd->windowWidth)
                        width = (wnd->visibleOffsetX + wnd->windowWidth - 1) - ax;
		
		if (ay + height > wnd->visibleOffsetY + wnd->windowHeight)
                        height = (wnd->visibleOffsetY + wnd->windowHeight - 1) - ay;
	}
	
	if (xfi->sw_gdi)
	{
		XPutImage(xfi->display, xfi->primary, window->gc, xfi->image,
			ax, ay, ax, ay, width, height);
	}

	XCopyArea(xfi->display, xfi->primary, window->handle, window->gc,
			ax, ay, width, height, x, y);

	XFlush(xfi->display);
}

BOOL xf_IsWindowBorder(xfInfo* xfi, xfWindow* xfw, int x, int y)
{
	rdpWindow* wnd;
	BOOL clientArea = FALSE;
	BOOL windowArea = FALSE;

	wnd = xfw->window;

	if (((x > wnd->clientOffsetX) && (x < wnd->clientOffsetX + wnd->clientAreaWidth)) &&
		((y > wnd->clientOffsetY) && (y < wnd->clientOffsetY + wnd->clientAreaHeight)))
		clientArea = TRUE;

	if (((x > wnd->windowOffsetX) && (x < wnd->windowOffsetX + wnd->windowWidth)) &&
		((y > wnd->windowOffsetY) && (y < wnd->windowOffsetY + wnd->windowHeight)))
		windowArea = TRUE;

	return (windowArea && !(clientArea));
}

void xf_DestroyWindow(xfInfo* xfi, xfWindow* window)
{
	if (window == NULL)
		return;

	if (xfi->window == window)
		xfi->window = NULL;

	if (window->gc)
		XFreeGC(xfi->display, window->gc);

	if (window->handle)
	{
		XUnmapWindow(xfi->display, window->handle);
		XDestroyWindow(xfi->display, window->handle);
	}

	free(window);
}

rdpWindow* xf_rdpWindowFromWindow(xfInfo* xfi, Window wnd)
{
	rdpRail* rail;

	if (xfi != NULL)
	{
		if (wnd != 0)
		{
			if (xfi->_context != NULL)
			{
				rail = xfi->_context->rail;
				if (rail != NULL)
				{
					return window_list_get_by_extra_id(rail->list, (void*)(long)wnd);
				}
			}
		}
	}
	return NULL;
}