xf_window.c

 
#include <freerdp/config.h>
 
#include <stdarg.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/types.h>
 
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
 
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
 
#include <winpr/assert.h>
#include <winpr/thread.h>
#include <winpr/crt.h>
#include <winpr/string.h>
 
#include <freerdp/rail.h>
#include <freerdp/log.h>
 
#ifdef WITH_XEXT
#include <X11/extensions/shape.h>
#endif
 
#ifdef WITH_XI
#include <X11/extensions/XInput2.h>
#endif
 
#include "xf_gfx.h"
#include "xf_rail.h"
#include "xf_input.h"
#include "xf_keyboard.h"
#include "xf_utils.h"
#include "xf_debug.h"
 
#define TAG CLIENT_TAG("x11")
 
#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
 
#define ENTRY(x) \
  case x:      \
    return #x
 
typedef struct
{
  unsigned long flags;
  unsigned long functions;
  unsigned long decorations;
  long inputMode;
  unsigned long status;
} PropMotifWmHints;
 
static void xf_XSetTransientForHint(xfContext* xfc, xfAppWindow* window);
 
static const char* window_style_to_string(UINT32 style)
{
  switch (style)
  {
    ENTRY(WS_NONE);
    ENTRY(WS_BORDER);
    ENTRY(WS_CAPTION);
    ENTRY(WS_CHILD);
    ENTRY(WS_CLIPCHILDREN);
    ENTRY(WS_CLIPSIBLINGS);
    ENTRY(WS_DISABLED);
    ENTRY(WS_DLGFRAME);
    ENTRY(WS_GROUP);
    ENTRY(WS_HSCROLL);
    ENTRY(WS_MAXIMIZE);
    ENTRY(WS_MAXIMIZEBOX);
    ENTRY(WS_MINIMIZE);
    ENTRY(WS_OVERLAPPEDWINDOW);
    ENTRY(WS_POPUP);
    ENTRY(WS_POPUPWINDOW);
    ENTRY(WS_SIZEBOX);
    ENTRY(WS_SYSMENU);
    ENTRY(WS_VISIBLE);
    ENTRY(WS_VSCROLL);
    default:
      return nullptr;
  }
}
 
const char* window_styles_to_string(UINT32 style, char* buffer, size_t length)
{
  (void)_snprintf(buffer, length, "style[0x%08" PRIx32 "] {", style);
  const char* sep = "";
  for (size_t x = 0; x < 32; x++)
  {
    const UINT32 val = 1u << x;
    if ((style & val) != 0)
    {
      const char* str = window_style_to_string(val);
      if (str)
      {
        winpr_str_append(str, buffer, length, sep);
        sep = "|";
      }
    }
  }
  winpr_str_append("}", buffer, length, "");
 
  return buffer;
}
 
static const char* window_style_ex_to_string(UINT32 styleEx)
{
  switch (styleEx)
  {
    ENTRY(WS_EX_ACCEPTFILES);
    ENTRY(WS_EX_APPWINDOW);
    ENTRY(WS_EX_CLIENTEDGE);
    ENTRY(WS_EX_COMPOSITED);
    ENTRY(WS_EX_CONTEXTHELP);
    ENTRY(WS_EX_CONTROLPARENT);
    ENTRY(WS_EX_DLGMODALFRAME);
    ENTRY(WS_EX_LAYERED);
    ENTRY(WS_EX_LAYOUTRTL);
    ENTRY(WS_EX_LEFTSCROLLBAR);
    ENTRY(WS_EX_MDICHILD);
    ENTRY(WS_EX_NOACTIVATE);
    ENTRY(WS_EX_NOINHERITLAYOUT);
    ENTRY(WS_EX_NOPARENTNOTIFY);
    ENTRY(WS_EX_OVERLAPPEDWINDOW);
    ENTRY(WS_EX_PALETTEWINDOW);
    ENTRY(WS_EX_RIGHT);
    ENTRY(WS_EX_RIGHTSCROLLBAR);
    ENTRY(WS_EX_RTLREADING);
    ENTRY(WS_EX_STATICEDGE);
    ENTRY(WS_EX_TOOLWINDOW);
    ENTRY(WS_EX_TOPMOST);
    ENTRY(WS_EX_TRANSPARENT);
    ENTRY(WS_EX_WINDOWEDGE);
    default:
      return nullptr;
  }
}
 
const char* window_styles_ex_to_string(UINT32 styleEx, char* buffer, size_t length)
{
  (void)_snprintf(buffer, length, "styleEx[0x%08" PRIx32 "] {", styleEx);
  const char* sep = "";
  for (size_t x = 0; x < 32; x++)
  {
    const UINT32 val = (UINT32)(1UL << x);
    if ((styleEx & val) != 0)
    {
      const char* str = window_style_ex_to_string(val);
      if (str)
      {
        winpr_str_append(str, buffer, length, sep);
        sep = "|";
      }
    }
  }
  winpr_str_append("}", buffer, length, "");
 
  return buffer;
}
 
static void xf_SetWindowTitleText(xfContext* xfc, Window window, const char* name)
{
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(name);
 
  const size_t i = strnlen(name, MAX_PATH);
  XStoreName(xfc->display, window, name);
  Atom wm_Name = xfc->NET_WM_NAME;
  Atom utf8Str = xfc->UTF8_STRING;
  LogDynAndXChangeProperty(xfc->log, xfc->display, window, wm_Name, utf8Str, 8, PropModeReplace,
                           (const unsigned char*)name, (int)i);
}
 
void xf_SendClientEvent(xfContext* xfc, Window window, Atom atom, unsigned int numArgs, ...)
{
  XEvent xevent = WINPR_C_ARRAY_INIT;
  va_list argp = WINPR_C_ARRAY_INIT;
  va_start(argp, numArgs);
 
  xevent.xclient.type = ClientMessage;
  xevent.xclient.serial = 0;
  xevent.xclient.send_event = False;
  xevent.xclient.display = xfc->display;
  xevent.xclient.window = window;
  xevent.xclient.message_type = atom;
  xevent.xclient.format = 32;
 
  for (size_t i = 0; i < numArgs; i++)
  {
    xevent.xclient.data.l[i] = va_arg(argp, int);
  }
 
  WLog_Print(xfc->log, WLOG_TRACE, "Send ClientMessage Event: wnd=0x%04lX",
             (unsigned long)xevent.xclient.window);
  LogDynAndXSendEvent(xfc->log, xfc->display, RootWindowOfScreen(xfc->screen), False,
                      SubstructureRedirectMask | SubstructureNotifyMask, &xevent);
  LogDynAndXSync(xfc->log, xfc->display, False);
  va_end(argp);
}
 
void xf_SetWindowMinimized(xfContext* xfc, xfWindow* window)
{
  XIconifyWindow(xfc->display, window->handle, xfc->screen_number);
}
 
void xf_SetWindowFullscreen(xfContext* xfc, xfWindow* window, BOOL fullscreen)
{
  const rdpSettings* settings = nullptr;
  int startX = 0;
  int startY = 0;
  UINT32 width = WINPR_ASSERTING_INT_CAST(uint32_t, window->width);
  UINT32 height = WINPR_ASSERTING_INT_CAST(uint32_t, window->height);
 
  WINPR_ASSERT(xfc);
 
  settings = xfc->common.context.settings;
  WINPR_ASSERT(settings);
 
  /* xfc->decorations is set by caller depending on settings and whether it is fullscreen or not
   */
  window->decorations = xfc->decorations;
  /* show/hide decorations (e.g. title bar) as guided by xfc->decorations */
  xf_SetWindowDecorations(xfc, window->handle, window->decorations);
  WLog_Print(xfc->log, WLOG_TRACE, "X window decoration set to %d", (int)window->decorations);
  xf_floatbar_toggle_fullscreen(xfc->window->floatbar, fullscreen);
 
  if (fullscreen)
  {
    xfc->savedWidth = xfc->window->width;
    xfc->savedHeight = xfc->window->height;
    xfc->savedPosX = xfc->window->left;
    xfc->savedPosY = xfc->window->top;
 
    startX = (freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosX) != UINT32_MAX)
                 ? WINPR_ASSERTING_INT_CAST(
                       int, freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosX))
                 : 0;
    startY = (freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosY) != UINT32_MAX)
                 ? WINPR_ASSERTING_INT_CAST(
                       int, freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosY))
                 : 0;
  }
  else
  {
    width = WINPR_ASSERTING_INT_CAST(uint32_t, xfc->savedWidth);
    height = WINPR_ASSERTING_INT_CAST(uint32_t, xfc->savedHeight);
    startX = xfc->savedPosX;
    startY = xfc->savedPosY;
  }
 
  /* Determine the x,y starting location for the fullscreen window */
  if (fullscreen)
  {
    const rdpMonitor* firstMonitor =
        freerdp_settings_get_pointer_array(settings, FreeRDP_MonitorDefArray, 0);
    /* Initialize startX and startY with reasonable values */
    startX = firstMonitor->x;
    startY = firstMonitor->y;
 
    /* Search all monitors to find the lowest startX and startY values */
    for (size_t i = 0; i < freerdp_settings_get_uint32(settings, FreeRDP_MonitorCount); i++)
    {
      const rdpMonitor* monitor =
          freerdp_settings_get_pointer_array(settings, FreeRDP_MonitorDefArray, i);
      startX = MIN(startX, monitor->x);
      startY = MIN(startY, monitor->y);
    }
 
    /* Lastly apply any monitor shift(translation from remote to local coordinate system)
     *  to startX and startY values
     */
    startX += freerdp_settings_get_int32(settings, FreeRDP_MonitorLocalShiftX);
    startY += freerdp_settings_get_int32(settings, FreeRDP_MonitorLocalShiftY);
  }
 
  /*
    It is safe to proceed with simply toggling _NET_WM_STATE_FULLSCREEN window state on the
    following conditions:
         - The window manager supports multiple monitor full screen
         - The user requested to use a single monitor to render the remote desktop
   */
  if (xfc->NET_WM_FULLSCREEN_MONITORS != None ||
      freerdp_settings_get_uint32(settings, FreeRDP_MonitorCount) == 1)
  {
    xf_ResizeDesktopWindow(xfc, window, WINPR_ASSERTING_INT_CAST(int, width),
                           WINPR_ASSERTING_INT_CAST(int, height));
 
    if (fullscreen)
    {
      /* enter full screen: move the window before adding NET_WM_STATE_FULLSCREEN */
      LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle, startX, startY);
    }
 
    /* Set the fullscreen state */
    xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4,
                       fullscreen ? NET_WM_STATE_ADD : NET_WM_STATE_REMOVE,
                       xfc->NET_WM_STATE_FULLSCREEN, 0, 0);
 
    if (!fullscreen)
    {
      /* leave full screen: move the window after removing NET_WM_STATE_FULLSCREEN
       * Resize the window again, the previous call to xf_SendClientEvent might have
       * changed the window size (borders, ...)
       */
      xf_ResizeDesktopWindow(xfc, window, WINPR_ASSERTING_INT_CAST(int, width),
                             WINPR_ASSERTING_INT_CAST(int, height));
      LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle, startX, startY);
    }
 
    /* Set monitor bounds */
    if (freerdp_settings_get_uint32(settings, FreeRDP_MonitorCount) > 1)
    {
      xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_FULLSCREEN_MONITORS, 5,
                         xfc->fullscreenMonitors.top, xfc->fullscreenMonitors.bottom,
                         xfc->fullscreenMonitors.left, xfc->fullscreenMonitors.right, 1);
    }
  }
  else
  {
    if (fullscreen)
    {
      xf_SetWindowDecorations(xfc, window->handle, FALSE);
 
      if (xfc->fullscreenMonitors.top)
      {
        xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_ADD,
                           xfc->fullscreenMonitors.top, 0, 0);
      }
      else
      {
        XSetWindowAttributes xswa = WINPR_C_ARRAY_INIT;
        xswa.override_redirect = True;
        LogDynAndXChangeWindowAttributes(xfc->log, xfc->display, window->handle,
                                         CWOverrideRedirect, &xswa);
        LogDynAndXRaiseWindow(xfc->log, xfc->display, window->handle);
        xswa.override_redirect = False;
        LogDynAndXChangeWindowAttributes(xfc->log, xfc->display, window->handle,
                                         CWOverrideRedirect, &xswa);
      }
 
      /* if window is in maximized state, save and remove */
      if (xfc->NET_WM_STATE_MAXIMIZED_VERT != None)
      {
        BYTE state = 0;
        unsigned long nitems = 0;
        unsigned long bytes = 0;
        BYTE* prop = nullptr;
 
        if (xf_GetWindowProperty(xfc, window->handle, xfc->NET_WM_STATE, 255, &nitems,
                                 &bytes, &prop))
        {
          const Atom* aprop = WINPR_PACKED_ALIGN_CAST(const Atom*, prop);
          state = 0;
 
          for (size_t x = 0; x < nitems; x++)
          {
            if (aprop[x] == xfc->NET_WM_STATE_MAXIMIZED_VERT)
              state |= 0x01;
 
            if (aprop[x] == xfc->NET_WM_STATE_MAXIMIZED_HORZ)
              state |= 0x02;
          }
 
          if (state)
          {
            xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4,
                               NET_WM_STATE_REMOVE, xfc->NET_WM_STATE_MAXIMIZED_VERT, 0,
                               0);
            xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4,
                               NET_WM_STATE_REMOVE, xfc->NET_WM_STATE_MAXIMIZED_HORZ, 0,
                               0);
            xfc->savedMaximizedState = state;
          }
 
          XFree(prop);
        }
      }
 
      width = xfc->vscreen.area.right - xfc->vscreen.area.left + 1;
      height = xfc->vscreen.area.bottom - xfc->vscreen.area.top + 1;
      WLog_Print(xfc->log, WLOG_TRACE,
                 "X window move and resize %dx%d@%" PRIu32 "x%" PRIu32 "", startX, startY,
                 width, height);
      xf_ResizeDesktopWindow(xfc, window, WINPR_ASSERTING_INT_CAST(int, width),
                             WINPR_ASSERTING_INT_CAST(int, height));
      LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle, startX, startY);
    }
    else
    {
      xf_SetWindowDecorations(xfc, window->handle, window->decorations);
      xf_ResizeDesktopWindow(xfc, window, WINPR_ASSERTING_INT_CAST(int, width),
                             WINPR_ASSERTING_INT_CAST(int, height));
      LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle, startX, startY);
 
      if (xfc->fullscreenMonitors.top)
      {
        xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_REMOVE,
                           xfc->fullscreenMonitors.top, 0, 0);
      }
 
      /* restore maximized state, if the window was maximized before setting fullscreen */
      if (xfc->savedMaximizedState & 0x01)
      {
        xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_ADD,
                           xfc->NET_WM_STATE_MAXIMIZED_VERT, 0, 0);
      }
 
      if (xfc->savedMaximizedState & 0x02)
      {
        xf_SendClientEvent(xfc, window->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_ADD,
                           xfc->NET_WM_STATE_MAXIMIZED_HORZ, 0, 0);
      }
 
      xfc->savedMaximizedState = 0;
    }
  }
}
 
/* http://tronche.com/gui/x/xlib/window-information/XGetWindowProperty.html */
 
BOOL xf_GetWindowProperty(xfContext* xfc, Window window, Atom property, int length,
                          unsigned long* nitems, unsigned long* bytes, BYTE** prop)
{
  int status = 0;
  Atom actual_type = None;
  int actual_format = 0;
 
  WINPR_ASSERT(prop);
 
  if (property == None)
    return FALSE;
 
  status = LogDynAndXGetWindowProperty(xfc->log, xfc->display, window, property, 0, length, False,
                                       AnyPropertyType, &actual_type, &actual_format, nitems,
                                       bytes, prop);
 
  if (status != Success)
    return FALSE;
 
  if (actual_type == None)
  {
    WLog_DBG(TAG, "Property %lu does not exist", (unsigned long)property);
    if (*prop)
      XFree(*prop);
    *prop = nullptr;
    return FALSE;
  }
 
  return TRUE;
}
 
static BOOL xf_GetNumberOfDesktops(xfContext* xfc, Window root, unsigned* pval)
{
  unsigned long nitems = 0;
  unsigned long bytes = 0;
  BYTE* bprop = nullptr;
 
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(pval);
 
  const BOOL rc =
      xf_GetWindowProperty(xfc, root, xfc->NET_NUMBER_OF_DESKTOPS, 1, &nitems, &bytes, &bprop);
 
  long* prop = WINPR_PACKED_ALIGN_CAST(long*, bprop);
  *pval = 0;
 
  BOOL res = FALSE;
  if (rc)
  {
    if ((*prop >= 0) && (*prop <= UINT32_MAX))
    {
      *pval = (UINT32)*prop;
      res = TRUE;
    }
  }
  if (prop)
    XFree(prop);
  return res;
}
 
static BOOL xf_GetCurrentDesktop(xfContext* xfc, Window root)
{
  unsigned long nitems = 0;
  unsigned long bytes = 0;
  BYTE* bprop = nullptr;
  unsigned max = 0;
 
  if (!xf_GetNumberOfDesktops(xfc, root, &max))
    return FALSE;
  if (max < 1)
    return FALSE;
 
  const BOOL rc =
      xf_GetWindowProperty(xfc, root, xfc->NET_CURRENT_DESKTOP, 1, &nitems, &bytes, &bprop);
 
  long* prop = WINPR_PACKED_ALIGN_CAST(long*, bprop);
  xfc->current_desktop = 0;
  if (rc)
    xfc->current_desktop = (int)MIN(max - 1, *prop);
  if (prop)
    XFree(prop);
  return rc;
}
 
static BOOL xf_GetWorkArea_NET_WORKAREA(xfContext* xfc, Window root)
{
  BOOL rc = FALSE;
  unsigned long nitems = 0;
  unsigned long bytes = 0;
  BYTE* bprop = nullptr;
 
  const BOOL status =
      xf_GetWindowProperty(xfc, root, xfc->NET_WORKAREA, INT_MAX, &nitems, &bytes, &bprop);
  long* prop = WINPR_PACKED_ALIGN_CAST(long*, bprop);
 
  if (!status)
    goto fail;
 
  if ((xfc->current_desktop * 4 + 3) >= (INT64)nitems)
    goto fail;
 
  xfc->workArea.x = (INT32)MIN(INT32_MAX, prop[xfc->current_desktop * 4 + 0]);
  xfc->workArea.y = (INT32)MIN(INT32_MAX, prop[xfc->current_desktop * 4 + 1]);
  xfc->workArea.width = (UINT32)MIN(UINT32_MAX, prop[xfc->current_desktop * 4 + 2]);
  xfc->workArea.height = (UINT32)MIN(UINT32_MAX, prop[xfc->current_desktop * 4 + 3]);
 
  rc = TRUE;
fail:
  XFree(prop);
  return rc;
}
 
BOOL xf_GetWorkArea(xfContext* xfc)
{
  WINPR_ASSERT(xfc);
 
  Window root = DefaultRootWindow(xfc->display);
  (void)xf_GetCurrentDesktop(xfc, root);
  return xf_GetWorkArea_NET_WORKAREA(xfc, root);
}
 
void xf_SetWindowDecorations(xfContext* xfc, Window window, BOOL show)
{
  PropMotifWmHints hints = { .decorations = (show) ? MWM_DECOR_ALL : 0,
                           .functions = MWM_FUNC_ALL,
                           .flags = MWM_HINTS_DECORATIONS | MWM_HINTS_FUNCTIONS,
                           .inputMode = 0,
                           .status = 0 };
  WINPR_ASSERT(xfc);
  LogDynAndXChangeProperty(xfc->log, xfc->display, window, xfc->MOTIF_WM_HINTS,
                           xfc->MOTIF_WM_HINTS, 32, PropModeReplace, (BYTE*)&hints,
                           PROP_MOTIF_WM_HINTS_ELEMENTS);
}
 
void xf_SetWindowUnlisted(xfContext* xfc, Window window)
{
  WINPR_ASSERT(xfc);
  Atom window_state[] = { xfc->NET_WM_STATE_SKIP_PAGER, xfc->NET_WM_STATE_SKIP_TASKBAR };
  LogDynAndXChangeProperty(xfc->log, xfc->display, window, xfc->NET_WM_STATE, XA_ATOM, 32,
                           PropModeReplace, (BYTE*)window_state, 2);
}
 
static void xf_SetWindowPID(xfContext* xfc, Window window, pid_t pid)
{
  Atom am_wm_pid = 0;
 
  WINPR_ASSERT(xfc);
  if (!pid)
    pid = getpid();
 
  am_wm_pid = xfc->NET_WM_PID;
  LogDynAndXChangeProperty(xfc->log, xfc->display, window, am_wm_pid, XA_CARDINAL, 32,
                           PropModeReplace, (BYTE*)&pid, 1);
}
 
static const char* get_shm_id(void)
{
  static char shm_id[64];
  (void)sprintf_s(shm_id, sizeof(shm_id), "/com.freerdp.xfreerdp.tsmf_%016X",
                  GetCurrentProcessId());
  return shm_id;
}
 
Window xf_CreateDummyWindow(xfContext* xfc)
{
  return LogDynAndXCreateWindow(
      xfc->log, xfc->display, RootWindowOfScreen(xfc->screen),
      WINPR_ASSERTING_INT_CAST(int, xfc->workArea.x),
      WINPR_ASSERTING_INT_CAST(int, xfc->workArea.y), 1, 1, 0, xfc->depth, InputOutput,
      xfc->visual, WINPR_ASSERTING_INT_CAST(uint32_t, xfc->attribs_mask), &xfc->attribs);
}
 
void xf_DestroyDummyWindow(xfContext* xfc, Window window)
{
  if (window)
    LogDynAndXDestroyWindow(xfc->log, xfc->display, window);
}
 
xfWindow* xf_CreateDesktopWindow(xfContext* xfc, char* name, int width, int height)
{
  XEvent xevent = WINPR_C_ARRAY_INIT;
  int input_mask = 0;
  XClassHint* classHints = nullptr;
  xfWindow* window = (xfWindow*)calloc(1, sizeof(xfWindow));
 
  if (!window)
    return nullptr;
 
  rdpSettings* settings = xfc->common.context.settings;
  WINPR_ASSERT(settings);
 
  Window parentWindow = (Window)freerdp_settings_get_uint64(settings, FreeRDP_ParentWindowId);
  window->width = width;
  window->height = height;
  window->decorations = xfc->decorations;
  window->is_mapped = FALSE;
  window->is_transient = FALSE;
 
  WINPR_ASSERT(xfc->depth != 0);
  window->handle = LogDynAndXCreateWindow(
      xfc->log, xfc->display, RootWindowOfScreen(xfc->screen),
      WINPR_ASSERTING_INT_CAST(int, xfc->workArea.x),
      WINPR_ASSERTING_INT_CAST(int, xfc->workArea.y), xfc->workArea.width, xfc->workArea.height,
      0, xfc->depth, InputOutput, xfc->visual,
      WINPR_ASSERTING_INT_CAST(uint32_t, xfc->attribs_mask), &xfc->attribs);
  window->shmid = shm_open(get_shm_id(), (O_CREAT | O_RDWR), (S_IREAD | S_IWRITE));
 
  if (window->shmid < 0)
  {
    WLog_Print(xfc->log, WLOG_TRACE,
               "xf_CreateDesktopWindow: failed to get access to shared memory - shmget()\n");
  }
  else
  {
    int rc = ftruncate(window->shmid, sizeof(window->handle));
    if (rc != 0)
    {
      char ebuffer[256] = WINPR_C_ARRAY_INIT;
      WLog_Print(xfc->log, WLOG_TRACE, "ftruncate failed with %s [%d]",
                 winpr_strerror(rc, ebuffer, sizeof(ebuffer)), rc);
    }
    else
    {
      void* mem = mmap(nullptr, sizeof(window->handle), PROT_READ | PROT_WRITE, MAP_SHARED,
                       window->shmid, 0);
 
      if (mem == MAP_FAILED)
      {
        WLog_Print(
            xfc->log, WLOG_TRACE,
            "xf_CreateDesktopWindow: failed to assign pointer to the memory address - "
            "shmat()\n");
      }
      else
      {
        window->xfwin = mem;
        *window->xfwin = window->handle;
      }
    }
  }
 
  classHints = XAllocClassHint();
 
  if (classHints)
  {
    classHints->res_name = "xfreerdp";
 
    char* res_class = nullptr;
    const char* WmClass = freerdp_settings_get_string(settings, FreeRDP_WmClass);
    if (WmClass)
      res_class = _strdup(WmClass);
    else
      res_class = _strdup("xfreerdp");
 
    classHints->res_class = res_class;
    XSetClassHint(xfc->display, window->handle, classHints);
    XFree(classHints);
    free(res_class);
  }
 
  xf_ResizeDesktopWindow(xfc, window, width, height);
  xf_SetWindowDecorations(xfc, window->handle, window->decorations);
  xf_SetWindowPID(xfc, window->handle, 0);
  input_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
               VisibilityChangeMask | FocusChangeMask | StructureNotifyMask | PointerMotionMask |
               ExposureMask | PropertyChangeMask;
 
  if (xfc->grab_keyboard)
    input_mask |= EnterWindowMask | LeaveWindowMask;
 
  LogDynAndXChangeProperty(xfc->log, xfc->display, window->handle, xfc->NET_WM_ICON, XA_CARDINAL,
                           32, PropModeReplace, (BYTE*)xf_icon_prop, ARRAYSIZE(xf_icon_prop));
 
  if (parentWindow)
    LogDynAndXReparentWindow(xfc->log, xfc->display, window->handle, parentWindow, 0, 0);
 
  XSelectInput(xfc->display, window->handle, input_mask);
  LogDynAndXClearWindow(xfc->log, xfc->display, window->handle);
  xf_SetWindowTitleText(xfc, window->handle, name);
  LogDynAndXMapWindow(xfc->log, xfc->display, window->handle);
  if (xf_input_init(xfc, window->handle) < 0)
  {
    xf_DestroyDesktopWindow(xfc, window);
    return nullptr;
  }
 
  /*
   * NOTE: This must be done here to handle reparenting the window,
   * so that we don't miss the event and hang waiting for the next one
   */
  do
  {
    XMaskEvent(xfc->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 (freerdp_settings_get_bool(settings, FreeRDP_RemoteApplicationMode))
  {
    LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle, 0, 0);
  }
  else if ((freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosX) != UINT32_MAX) &&
           (freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosY) != UINT32_MAX))
  {
    LogDynAndXMoveWindow(xfc->log, xfc->display, window->handle,
                         WINPR_ASSERTING_INT_CAST(
                             int, freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosX)),
                         WINPR_ASSERTING_INT_CAST(
                             int, freerdp_settings_get_uint32(settings, FreeRDP_DesktopPosY)));
  }
 
  window->floatbar = xf_floatbar_new(xfc, window->handle, name,
                                     freerdp_settings_get_uint32(settings, FreeRDP_Floatbar));
 
  if (xfc->XWAYLAND_MAY_GRAB_KEYBOARD)
    xf_SendClientEvent(xfc, window->handle, xfc->XWAYLAND_MAY_GRAB_KEYBOARD, 1, 1);
 
  return window;
}
 
void xf_ResizeDesktopWindow(xfContext* xfc, xfWindow* window, int width, int height)
{
  XSizeHints* size_hints = nullptr;
  rdpSettings* settings = nullptr;
 
  if (!xfc || !window)
    return;
 
  settings = xfc->common.context.settings;
  WINPR_ASSERT(settings);
 
  if (!(size_hints = XAllocSizeHints()))
    return;
 
  size_hints->flags = PMinSize | PMaxSize | PWinGravity;
  size_hints->win_gravity = NorthWestGravity;
  size_hints->min_width = size_hints->min_height = 1;
  size_hints->max_width = size_hints->max_height = 16384;
  LogDynAndXResizeWindow(xfc->log, xfc->display, window->handle,
                         WINPR_ASSERTING_INT_CAST(uint32_t, width),
                         WINPR_ASSERTING_INT_CAST(uint32_t, height));
#ifdef WITH_XRENDER
 
  if (!freerdp_settings_get_bool(settings, FreeRDP_SmartSizing) &&
      !freerdp_settings_get_bool(settings, FreeRDP_DynamicResolutionUpdate))
#endif
  {
    if (!xfc->fullscreen)
    {
      /* min == max is an hint for the WM to indicate that the window should
       * not be resizable */
      size_hints->min_width = size_hints->max_width = width;
      size_hints->min_height = size_hints->max_height = height;
    }
  }
 
  XSetWMNormalHints(xfc->display, window->handle, size_hints);
  XFree(size_hints);
}
 
void xf_DestroyDesktopWindow(xfContext* xfc, xfWindow* window)
{
  WINPR_ASSERT(xfc);
 
  if (!window)
    return;
 
  if (xfc->window == window)
    xfc->window = nullptr;
 
  /* Reset XI2 event flags so standard X11 events are processed for RAIL
   * windows. The per-window XI2 registrations were on the now-destroyed
   * desktop window and will no longer fire. */
  xfc->xi_event = false;
  xfc->xi_rawevent = false;
  xf_ungrab(xfc);
 
  xf_floatbar_free(window->floatbar);
 
  if (window->gc)
    LogDynAndXFreeGC(xfc->log, xfc->display, window->gc);
 
  if (window->handle)
  {
    LogDynAndXUnmapWindow(xfc->log, xfc->display, window->handle);
    LogDynAndXDestroyWindow(xfc->log, xfc->display, window->handle);
  }
 
  if (window->xfwin)
    munmap(window->xfwin, sizeof(*window->xfwin));
 
  if (window->shmid >= 0)
    close(window->shmid);
 
  shm_unlink(get_shm_id());
  window->xfwin = (Window*)-1;
  window->shmid = -1;
  free(window);
}
 
void xf_SetWindowStyle(xfContext* xfc, xfAppWindow* appWindow, UINT32 style, UINT32 ex_style)
{
  Atom window_type = 0;
  BOOL redirect = FALSE;
 
  window_type = xfc->NET_WM_WINDOW_TYPE_NORMAL;
 
  if ((ex_style & WS_EX_NOACTIVATE) || (ex_style & WS_EX_TOOLWINDOW))
  {
    redirect = TRUE;
    appWindow->is_transient = TRUE;
    xf_SetWindowUnlisted(xfc, appWindow->handle);
    window_type = xfc->NET_WM_WINDOW_TYPE_DROPDOWN_MENU;
  }
  /*
   * TOPMOST window that is not a tool window is treated like a regular window (i.e. task
   * manager). Want to do this here, since the window may have type WS_POPUP
   */
  else if (ex_style & WS_EX_TOPMOST)
  {
    window_type = xfc->NET_WM_WINDOW_TYPE_NORMAL;
  }
 
  if (style & WS_POPUP)
  {
    window_type = xfc->NET_WM_WINDOW_TYPE_DIALOG;
    /* this includes dialogs, popups, etc, that need to be full-fledged windows */
 
    if (!((ex_style & WS_EX_DLGMODALFRAME) || (ex_style & WS_EX_LAYERED) ||
          (style & WS_SYSMENU)))
    {
      appWindow->is_transient = TRUE;
      redirect = TRUE;
 
      xf_SetWindowUnlisted(xfc, appWindow->handle);
    }
  }
 
  if (!(style == 0 && ex_style == 0))
  {
    xf_SetWindowActions(xfc, appWindow);
  }
 
  {
    /*
     * 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 = WINPR_C_ARRAY_INIT;
    attrs.override_redirect = redirect ? True : False;
    LogDynAndXChangeWindowAttributes(xfc->log, xfc->display, appWindow->handle,
                                     CWOverrideRedirect, &attrs);
  }
 
  LogDynAndXChangeProperty(xfc->log, xfc->display, appWindow->handle, xfc->NET_WM_WINDOW_TYPE,
                           XA_ATOM, 32, PropModeReplace, (BYTE*)&window_type, 1);
 
  const BOOL above = (ex_style & WS_EX_TOPMOST) != 0;
  const BOOL transient = (style & WS_CHILD) == 0;
 
  if (transient)
    xf_XSetTransientForHint(
        xfc, appWindow); // xf_XSetTransientForHint only sets the hint if there is a parent
 
  xf_SendClientEvent(xfc, appWindow->handle, xfc->NET_WM_STATE, 4,
                     above ? NET_WM_STATE_ADD : NET_WM_STATE_REMOVE, xfc->NET_WM_STATE_ABOVE, 0,
                     0);
}
 
void xf_SetWindowActions(xfContext* xfc, xfAppWindow* appWindow)
{
  Atom allowed_actions[] = {
    xfc->NET_WM_ACTION_CLOSE,         xfc->NET_WM_ACTION_MINIMIZE,
    xfc->NET_WM_ACTION_MOVE,          xfc->NET_WM_ACTION_RESIZE,
    xfc->NET_WM_ACTION_MAXIMIZE_HORZ, xfc->NET_WM_ACTION_MAXIMIZE_VERT,
    xfc->NET_WM_ACTION_FULLSCREEN,    xfc->NET_WM_ACTION_CHANGE_DESKTOP
  };
 
  if (!(appWindow->dwStyle & WS_SYSMENU))
    allowed_actions[0] = 0;
 
  if (!(appWindow->dwStyle & WS_MINIMIZEBOX))
    allowed_actions[1] = 0;
 
  if (!(appWindow->dwStyle & WS_SIZEBOX))
    allowed_actions[3] = 0;
 
  if (!(appWindow->dwStyle & WS_MAXIMIZEBOX))
  {
    allowed_actions[4] = 0;
    allowed_actions[5] = 0;
    allowed_actions[6] = 0;
  }
 
  LogDynAndXChangeProperty(xfc->log, xfc->display, appWindow->handle, xfc->NET_WM_ALLOWED_ACTIONS,
                           XA_ATOM, 32, PropModeReplace, (unsigned char*)&allowed_actions, 8);
}
 
void xf_SetWindowText(xfContext* xfc, xfAppWindow* appWindow, const char* name)
{
  xf_SetWindowTitleText(xfc, appWindow->handle, name);
}
 
static void xf_FixWindowCoordinates(xfContext* xfc, int* x, int* y, int* width, int* height)
{
  int vscreen_width = 0;
  int vscreen_height = 0;
  vscreen_width = xfc->vscreen.area.right - xfc->vscreen.area.left + 1;
  vscreen_height = xfc->vscreen.area.bottom - xfc->vscreen.area.top + 1;
 
  if (*x < xfc->vscreen.area.left)
  {
    /* Only trim the window when a usable width is left. The original code
     * unconditionally did `*width += *x`, which turns the width negative
     * (and later clamps it to 1px) when the server reports an x far left of
     * the virtual desktop - which happens for RemoteApp dialogs when the
     * window manager places them. */
    const int shift = xfc->vscreen.area.left - *x;
 
    if (*width - shift >= 64)
      *width -= shift;
 
    *x = xfc->vscreen.area.left;
  }
 
  if (*y < xfc->vscreen.area.top)
  {
    /* See above. */
    const int shift = xfc->vscreen.area.top - *y;
 
    if (*height - shift >= 64)
      *height -= shift;
 
    *y = xfc->vscreen.area.top;
  }
 
  if (*width > vscreen_width)
  {
    *width = vscreen_width;
  }
 
  if (*height > vscreen_height)
  {
    *height = vscreen_height;
  }
 
  if (*width < 1)
  {
    *width = 1;
  }
 
  if (*height < 1)
  {
    *height = 1;
  }
}
 
int xf_AppWindowInit(xfContext* xfc, xfAppWindow* appWindow)
{
  if (!xfc || !appWindow)
    return -1;
 
  xf_SetWindowDecorations(xfc, appWindow->handle, appWindow->decorations);
  xf_SetWindowStyle(xfc, appWindow, appWindow->dwStyle, appWindow->dwExStyle);
  xf_SetWindowPID(xfc, appWindow->handle, 0);
  xf_ShowWindow(xfc, appWindow, WINDOW_SHOW);
  LogDynAndXClearWindow(xfc->log, xfc->display, appWindow->handle);
  LogDynAndXMapWindow(xfc->log, xfc->display, appWindow->handle);
  /* Move doesn't seem to work until window is mapped. */
  xf_MoveWindow(xfc, appWindow, appWindow->x, appWindow->y, appWindow->width, appWindow->height);
  xf_SetWindowText(xfc, appWindow, appWindow->title);
  return 1;
}
 
BOOL xf_AppWindowCreate(xfContext* xfc, xfAppWindow* appWindow)
{
  XGCValues gcv = WINPR_C_ARRAY_INIT;
  int input_mask = 0;
  XWMHints* InputModeHint = nullptr;
  XClassHint* class_hints = nullptr;
  const rdpSettings* settings = nullptr;
 
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(appWindow);
 
  settings = xfc->common.context.settings;
  WINPR_ASSERT(settings);
 
  xf_FixWindowCoordinates(xfc, &appWindow->x, &appWindow->y, &appWindow->width,
                          &appWindow->height);
  appWindow->shmid = -1;
  appWindow->decorations = xfc->decorations;
  appWindow->fullscreen = FALSE;
  appWindow->local_move.state = LMS_NOT_ACTIVE;
  appWindow->is_mapped = FALSE;
  appWindow->is_transient = FALSE;
  appWindow->rail_state = 0;
  appWindow->maxVert = FALSE;
  appWindow->maxHorz = FALSE;
  appWindow->minimized = FALSE;
  appWindow->rail_ignore_configure = FALSE;
  appWindow->rail_fullscreen_normalizing = FALSE;
  appWindow->lastWndSizeUpdate = 0;
 
  WINPR_ASSERT(xfc->depth != 0);
  appWindow->handle = LogDynAndXCreateWindow(
      xfc->log, xfc->display, RootWindowOfScreen(xfc->screen), appWindow->x, appWindow->y,
      WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->width),
      WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->height), 0, xfc->depth, InputOutput,
      xfc->visual, WINPR_ASSERTING_INT_CAST(uint32_t, xfc->attribs_mask), &xfc->attribs);
 
  if (!appWindow->handle)
    return FALSE;
 
  appWindow->gc =
      LogDynAndXCreateGC(xfc->log, xfc->display, appWindow->handle, GCGraphicsExposures, &gcv);
 
  if (!xf_AppWindowResize(xfc, appWindow))
    return FALSE;
 
  class_hints = XAllocClassHint();
 
  if (class_hints)
  {
    char* strclass = nullptr;
 
    const char* WmClass = freerdp_settings_get_string(settings, FreeRDP_WmClass);
    if (WmClass)
      strclass = _strdup(WmClass);
    else
    {
      size_t size = 0;
      winpr_asprintf(&strclass, &size, "RAIL:%08" PRIX64 "", appWindow->windowId);
    }
    class_hints->res_class = strclass;
    class_hints->res_name = "RAIL";
    XSetClassHint(xfc->display, appWindow->handle, class_hints);
    XFree(class_hints);
    free(strclass);
  }
 
  /* Set the input mode hint for the WM */
  InputModeHint = XAllocWMHints();
  InputModeHint->flags = (1L << 0);
  InputModeHint->input = True;
  XSetWMHints(xfc->display, appWindow->handle, InputModeHint);
  XFree(InputModeHint);
  XSetWMProtocols(xfc->display, appWindow->handle, &(xfc->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(xfc->display, appWindow->handle, input_mask);
 
  if (xfc->XWAYLAND_MAY_GRAB_KEYBOARD)
    xf_SendClientEvent(xfc, appWindow->handle, xfc->XWAYLAND_MAY_GRAB_KEYBOARD, 1, 1);
 
  return TRUE;
}
 
void xf_SetWindowMinMaxInfo(xfContext* xfc, xfAppWindow* appWindow, WINPR_ATTR_UNUSED int maxWidth,
                            WINPR_ATTR_UNUSED int maxHeight, WINPR_ATTR_UNUSED int maxPosX,
                            WINPR_ATTR_UNUSED int maxPosY, int minTrackWidth, int minTrackHeight,
                            int maxTrackWidth, int maxTrackHeight)
{
  XSizeHints* size_hints = nullptr;
  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(xfc->display, appWindow->handle, size_hints);
    XFree(size_hints);
  }
}
 
void xf_StartLocalMoveSize(xfContext* xfc, xfAppWindow* appWindow, int direction, int x, int y)
{
  if (appWindow->local_move.state != LMS_NOT_ACTIVE)
    return;
 
  /*
   * Save original mouse location relative to root.  This will be needed
   * to end local move to RDP server and/or X server
   */
  appWindow->local_move.root_x = x;
  appWindow->local_move.root_y = y;
  appWindow->local_move.state = LMS_STARTING;
  appWindow->local_move.direction = direction;
 
  xf_ungrab(xfc);
 
  xf_SendClientEvent(
      xfc, appWindow->handle,
      xfc->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(xfContext* xfc, xfAppWindow* appWindow)
{
  if (appWindow->local_move.state == LMS_NOT_ACTIVE)
    return;
 
  if (appWindow->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(
        xfc, appWindow->handle,
        xfc->NET_WM_MOVERESIZE,       /* request X window manager to abort a local move */
        5,                            /* 5 arguments to follow */
        appWindow->local_move.root_x, /* x relative to root window */
        appWindow->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 */
  }
 
  appWindow->local_move.state = LMS_NOT_ACTIVE;
}
 
void xf_MoveWindow(xfContext* xfc, xfAppWindow* appWindow, int x, int y, int width, int height)
{
  BOOL resize = FALSE;
 
  if ((width * height) < 1)
    return;
 
  if ((appWindow->width != width) || (appWindow->height != height))
    resize = TRUE;
 
  if (appWindow->local_move.state == LMS_STARTING || appWindow->local_move.state == LMS_ACTIVE)
    return;
 
  appWindow->x = x;
  appWindow->y = y;
  appWindow->width = width;
  appWindow->height = height;
 
  if (resize)
  {
    if (!xf_AppWindowResize(xfc, appWindow))
      return;
 
    LogDynAndXMoveResizeWindow(xfc->log, xfc->display, appWindow->handle, x, y,
                               WINPR_ASSERTING_INT_CAST(uint32_t, width),
                               WINPR_ASSERTING_INT_CAST(uint32_t, height));
  }
  else
    LogDynAndXMoveWindow(xfc->log, xfc->display, appWindow->handle, x, y);
 
  xf_UpdateWindowArea(xfc, appWindow, 0, 0, width, height);
}
 
void xf_ShowWindow(xfContext* xfc, xfAppWindow* appWindow, BYTE state)
{
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(appWindow);
 
  switch (state)
  {
    case WINDOW_HIDE:
      LogDynAndXWithdrawWindow(xfc->log, xfc->display, appWindow->handle, xfc->screen_number);
      break;
 
    case WINDOW_SHOW_MINIMIZED:
      appWindow->minimized = TRUE;
      XIconifyWindow(xfc->display, appWindow->handle, xfc->screen_number);
      break;
 
    case WINDOW_SHOW_MAXIMIZED:
      /* Set the window as maximized */
      appWindow->maxHorz = TRUE;
      appWindow->maxVert = TRUE;
      xf_SendClientEvent(xfc, appWindow->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_ADD,
                         xfc->NET_WM_STATE_MAXIMIZED_VERT, xfc->NET_WM_STATE_MAXIMIZED_HORZ,
                         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 (appWindow->rail_state == WINDOW_SHOW_MAXIMIZED)
      {
        xf_UpdateWindowArea(xfc, appWindow, 0, 0,
                            WINPR_ASSERTING_INT_CAST(int, appWindow->windowWidth),
                            WINPR_ASSERTING_INT_CAST(int, appWindow->windowHeight));
      }
 
      break;
 
    case WINDOW_SHOW:
      /* Ensure the window is not maximized */
      xf_SendClientEvent(xfc, appWindow->handle, xfc->NET_WM_STATE, 4, NET_WM_STATE_REMOVE,
                         xfc->NET_WM_STATE_MAXIMIZED_VERT, xfc->NET_WM_STATE_MAXIMIZED_HORZ,
                         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 (appWindow->rail_state == WINDOW_SHOW_MAXIMIZED)
        appWindow->rail_ignore_configure = TRUE;
 
      if (appWindow->is_transient)
        xf_SetWindowUnlisted(xfc, appWindow->handle);
 
      LogDynAndXMapWindow(xfc->log, xfc->display, appWindow->handle);
      break;
    default:
      break;
  }
 
  /* Save the current rail state of this window */
  appWindow->rail_state = state;
  LogDynAndXFlush(xfc->log, xfc->display);
}
 
void xf_SetWindowRects(xfContext* xfc, xfAppWindow* appWindow, RECTANGLE_16* rects, int nrects)
{
  XRectangle* xrects = nullptr;
 
  if (nrects < 1)
    return;
 
#ifdef WITH_XEXT
  xrects = (XRectangle*)calloc(WINPR_ASSERTING_INT_CAST(uint32_t, nrects), sizeof(XRectangle));
 
  for (int i = 0; i < nrects; i++)
  {
    /* Coords may be negative (INT16 in UINT16 fields); cast modularly, no assert. */
    xrects[i].x = WINPR_CXX_COMPAT_CAST(short, rects[i].left);
    xrects[i].y = WINPR_CXX_COMPAT_CAST(short, rects[i].top);
    xrects[i].width = WINPR_CXX_COMPAT_CAST(unsigned short, rects[i].right - rects[i].left);
    xrects[i].height = WINPR_CXX_COMPAT_CAST(unsigned short, rects[i].bottom - rects[i].top);
  }
 
  XShapeCombineRectangles(xfc->display, appWindow->handle, ShapeBounding, 0, 0, xrects, nrects,
                          ShapeSet, 0);
  free(xrects);
#endif
}
 
void xf_SetWindowVisibilityRects(xfContext* xfc, xfAppWindow* appWindow, UINT32 rectsOffsetX,
                                 UINT32 rectsOffsetY, RECTANGLE_16* rects, int nrects)
{
  XRectangle* xrects = nullptr;
 
  if (nrects < 1)
    return;
 
#ifdef WITH_XEXT
  xrects = (XRectangle*)calloc(WINPR_ASSERTING_INT_CAST(uint32_t, nrects), sizeof(XRectangle));
 
  for (int i = 0; i < nrects; i++)
  {
    /* Coords may be negative (INT16 in UINT16 fields); cast modularly, no assert. */
    xrects[i].x = WINPR_CXX_COMPAT_CAST(short, rects[i].left);
    xrects[i].y = WINPR_CXX_COMPAT_CAST(short, rects[i].top);
    xrects[i].width = WINPR_CXX_COMPAT_CAST(unsigned short, rects[i].right - rects[i].left);
    xrects[i].height = WINPR_CXX_COMPAT_CAST(unsigned short, rects[i].bottom - rects[i].top);
  }
 
  XShapeCombineRectangles(
      xfc->display, appWindow->handle, ShapeBounding, WINPR_ASSERTING_INT_CAST(int, rectsOffsetX),
      WINPR_ASSERTING_INT_CAST(int, rectsOffsetY), xrects, nrects, ShapeSet, 0);
  free(xrects);
#endif
}
 
void xf_ClearWindowVisibilityRects(xfContext* xfc, xfAppWindow* appWindow)
{
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(appWindow);
#ifdef WITH_XEXT
  /* Drop the bounding shape so the whole window is visible. */
  XShapeCombineMask(xfc->display, appWindow->handle, ShapeBounding, 0, 0, None, ShapeSet);
#endif
}
 
void xf_UpdateWindowArea(xfContext* xfc, xfAppWindow* appWindow, int x, int y, int width,
                         int height)
{
  int ax = 0;
  int ay = 0;
  const rdpSettings* settings = nullptr;
 
  WINPR_ASSERT(xfc);
 
  settings = xfc->common.context.settings;
  WINPR_ASSERT(settings);
 
  if (appWindow == nullptr)
    return;
 
  if (appWindow->surfaceId < UINT16_MAX)
    return;
 
  ax = x + appWindow->windowOffsetX;
  ay = y + appWindow->windowOffsetY;
 
  if (ax + width > appWindow->windowOffsetX + appWindow->width)
    width = (appWindow->windowOffsetX + appWindow->width - 1) - ax;
 
  if (ay + height > appWindow->windowOffsetY + appWindow->height)
    height = (appWindow->windowOffsetY + appWindow->height - 1) - ay;
 
  if (freerdp_settings_get_bool(settings, FreeRDP_SoftwareGdi))
  {
    LogDynAndXPutImage(xfc->log, xfc->display, appWindow->pixmap, appWindow->gc, xfc->image, ax,
                       ay, x, y, WINPR_ASSERTING_INT_CAST(uint32_t, width),
                       WINPR_ASSERTING_INT_CAST(uint32_t, height));
  }
 
  LogDynAndXCopyArea(xfc->log, xfc->display, appWindow->pixmap, appWindow->handle, appWindow->gc,
                     x, y, WINPR_ASSERTING_INT_CAST(uint32_t, width),
                     WINPR_ASSERTING_INT_CAST(uint32_t, height), x, y);
  LogDynAndXFlush(xfc->log, xfc->display);
}
 
void xf_AppWindowDestroyImage(xfAppWindow* appWindow)
{
  WINPR_ASSERT(appWindow);
  if (appWindow->image)
  {
    appWindow->image->data = nullptr;
    XDestroyImage(appWindow->image);
    appWindow->image = nullptr;
  }
}
 
void xf_DestroyWindow(xfContext* xfc, xfAppWindow* appWindow)
{
  if (!appWindow)
    return;
 
  if (xfc->appWindow == appWindow)
    xfc->appWindow = nullptr;
 
  if (appWindow->gc)
    LogDynAndXFreeGC(xfc->log, xfc->display, appWindow->gc);
 
  if (appWindow->pixmap)
    LogDynAndXFreePixmap(xfc->log, xfc->display, appWindow->pixmap);
 
  xf_AppWindowDestroyImage(appWindow);
 
  if (appWindow->handle)
  {
    LogDynAndXUnmapWindow(xfc->log, xfc->display, appWindow->handle);
    LogDynAndXDestroyWindow(xfc->log, xfc->display, appWindow->handle);
  }
 
  if (appWindow->xfwin)
    munmap(nullptr, sizeof(*appWindow->xfwin));
 
  if (appWindow->shmid >= 0)
    close(appWindow->shmid);
 
  shm_unlink(get_shm_id());
  appWindow->xfwin = (Window*)-1;
  appWindow->shmid = -1;
  free(appWindow->title);
  free(appWindow->windowRects);
  free(appWindow->visibilityRects);
  free(appWindow);
}
 
static xfAppWindow* get_windowUnlocked(xfContext* xfc, UINT64 id)
{
  WINPR_ASSERT(xfc);
  return HashTable_GetItemValue(xfc->railWindows, &id);
}
 
xfAppWindow* xf_rail_get_windowFrom(xfContext* xfc, UINT64 id, BOOL alreadyLocked, const char* file,
                                    const char* fkt, size_t line)
{
  if (!xfc)
    return nullptr;
 
  if (!xfc->railWindows)
    return nullptr;
 
  if (!alreadyLocked)
    xfAppWindowsLockFrom(xfc, file, fkt, line);
 
  xfAppWindow* window = get_windowUnlocked(xfc, id);
 
  if (!window && !alreadyLocked)
    xfAppWindowsUnlockFrom(xfc, file, fkt, line);
 
  return window;
}
 
xfAppWindow* xf_AppWindowFromX11WindowFrom(xfContext* xfc, Window wnd, const char* file,
                                           const char* fkt, size_t line)
{
  ULONG_PTR* pKeys = nullptr;
 
  WINPR_ASSERT(xfc);
  if (!xfc->railWindows)
    return nullptr;
 
  xfAppWindowsLockFrom(xfc, file, fkt, line);
  size_t count = HashTable_GetKeys(xfc->railWindows, &pKeys);
 
  for (size_t index = 0; index < count; index++)
  {
    xfAppWindow* appWindow = get_windowUnlocked(xfc, *(UINT64*)pKeys[index]);
 
    if (!appWindow)
    {
      xfAppWindowsUnlockFrom(xfc, file, fkt, line);
      free(pKeys);
      return nullptr;
    }
 
    if (appWindow->handle == wnd)
    {
      free(pKeys);
      return appWindow;
    }
  }
 
  xfAppWindowsUnlockFrom(xfc, file, fkt, line);
  free(pKeys);
  return nullptr;
}
 
UINT xf_AppUpdateWindowFromSurface(xfContext* xfc, gdiGfxSurface* surface)
{
  XImage* image = nullptr;
  UINT rc = ERROR_INTERNAL_ERROR;
 
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(surface);
 
  xfAppWindow* appWindow = xf_rail_get_window(xfc, surface->windowId, FALSE);
  if (!appWindow)
  {
    WLog_VRB(TAG, "Failed to find a window for id=0x%08" PRIx64, surface->windowId);
    return CHANNEL_RC_OK;
  }
 
  const BOOL surfaceChanged = (appWindow->surfaceId != surface->surfaceId);
  if (surfaceChanged)
    appWindow->surfaceId = surface->surfaceId;
 
  const BOOL maximized = (appWindow->dwStyle & WS_MAXIMIZE) != 0;
  const UINT32 winW = WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->width);
  const UINT32 winH = WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->height);
 
  const BOOL swGdi = freerdp_settings_get_bool(xfc->common.context.settings, FreeRDP_SoftwareGdi);
  UINT32 nrects = 0;
  const RECTANGLE_16* rects = region16_rects(&surface->invalidRegion, &nrects);
 
  RECTANGLE_16 fullRect = WINPR_C_ARRAY_INIT;
  if (surfaceChanged)
  {
    fullRect.right = WINPR_ASSERTING_INT_CAST(UINT16, MIN(winW, surface->width));
    fullRect.bottom = WINPR_ASSERTING_INT_CAST(UINT16, MIN(winH, surface->height));
    if ((fullRect.right > 0) && (fullRect.bottom > 0))
    {
      rects = &fullRect;
      nrects = 1;
    }
  }
 
  if (swGdi)
  {
    if (surfaceChanged || (appWindow->width != (INT64)surface->width) ||
        (appWindow->height != (INT64)surface->height))
      xf_AppWindowDestroyImage(appWindow);
 
    if (!appWindow->image)
    {
      WINPR_ASSERT(xfc->depth != 0);
      appWindow->image = LogDynAndXCreateImage(
          xfc->log, xfc->display, xfc->visual, WINPR_ASSERTING_INT_CAST(uint32_t, xfc->depth),
          ZPixmap, 0, (char*)surface->data, surface->width, surface->height,
          xfc->scanline_pad, WINPR_ASSERTING_INT_CAST(int, surface->scanline));
      if (!appWindow->image)
      {
        WLog_WARN(TAG,
                  "Failed create a XImage[%" PRIu32 "x%" PRIu32 ", scanline=%" PRIu32
                  ", bpp=%" PRId32 "] for window id=0x%08" PRIx64,
                  surface->width, surface->height, surface->scanline, xfc->depth,
                  surface->windowId);
        goto fail;
      }
      appWindow->image->byte_order = LSBFirst;
      appWindow->image->bitmap_bit_order = LSBFirst;
    }
 
    image = appWindow->image;
  }
  else
  {
    xfGfxSurface* xfSurface = (xfGfxSurface*)surface;
    image = xfSurface->image;
  }
 
  /* Skip the off-screen resize-margin frame a maximized surface carries: shift the blit by the
   * real left/top margin so content fills from (0,0). */
  const int insetX =
      (maximized && (surface->mappedWidth > winW)) ? (int)appWindow->resizeMarginLeft : 0;
  const int insetY =
      (maximized && (surface->mappedHeight > winH)) ? (int)appWindow->resizeMarginTop : 0;
 
  for (UINT32 x = 0; x < nrects; x++)
  {
    const RECTANGLE_16* rect = &rects[x];
    int srcX = rect->left;
    int srcY = rect->top;
    int dstX = (int)rect->left - insetX;
    int dstY = (int)rect->top - insetY;
    int w = (int)rect->right - rect->left;
    int h = (int)rect->bottom - rect->top;
 
    if (dstX < 0)
    {
      srcX -= dstX;
      w += dstX;
      dstX = 0;
    }
    if (dstY < 0)
    {
      srcY -= dstY;
      h += dstY;
      dstY = 0;
    }
    if ((w <= 0) || (h <= 0))
      continue;
 
    LogDynAndXPutImage(xfc->log, xfc->display, appWindow->pixmap, appWindow->gc, image, srcX,
                       srcY, dstX, dstY, WINPR_ASSERTING_INT_CAST(uint32_t, w),
                       WINPR_ASSERTING_INT_CAST(uint32_t, h));
 
    LogDynAndXCopyArea(xfc->log, xfc->display, appWindow->pixmap, appWindow->handle,
                       appWindow->gc, dstX, dstY, WINPR_ASSERTING_INT_CAST(uint32_t, w),
                       WINPR_ASSERTING_INT_CAST(uint32_t, h), dstX, dstY);
  }
 
  rc = CHANNEL_RC_OK;
fail:
  xf_rail_return_window(appWindow, FALSE);
  LogDynAndXFlush(xfc->log, xfc->display);
 
  return rc;
}
 
BOOL xf_AppWindowResize(xfContext* xfc, xfAppWindow* appWindow)
{
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(appWindow);
 
  if (appWindow->pixmap != 0)
    LogDynAndXFreePixmap(xfc->log, xfc->display, appWindow->pixmap);
 
  WINPR_ASSERT(xfc->depth != 0);
  appWindow->pixmap = LogDynAndXCreatePixmap(
      xfc->log, xfc->display, xfc->drawable, WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->width),
      WINPR_ASSERTING_INT_CAST(uint32_t, appWindow->height),
      WINPR_ASSERTING_INT_CAST(uint32_t, xfc->depth));
  xf_AppWindowDestroyImage(appWindow);
 
  return appWindow->pixmap != 0;
}
 
void xf_XSetTransientForHint(xfContext* xfc, xfAppWindow* window)
{
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(window);
 
  if (window->ownerWindowId == 0)
    return;
 
  xfAppWindow* parent = xf_rail_get_window(xfc, window->ownerWindowId, TRUE);
  if (!parent)
    return;
 
  (void)LogDynAndXSetTransientForHint(xfc->log, xfc->display, window->handle, parent->handle);
  xf_rail_return_window(parent, TRUE);
}
 
void xfAppWindowsLockFrom(xfContext* xfc, WINPR_ATTR_UNUSED const char* file,
                          WINPR_ATTR_UNUSED const char* fkt, WINPR_ATTR_UNUSED size_t line)
{
  WINPR_ASSERT(xfc);
 
#if defined(WITH_VERBOSE_WINPR_ASSERT)
  const DWORD level = WLOG_TRACE;
  if (WLog_IsLevelActive(xfc->log, level))
    WLog_PrintTextMessage(xfc->log, level, line, file, fkt, "[rails] locking [%s]", fkt);
#endif
 
  xf_lock_x11(xfc);
  if (xfc->railWindows)
    HashTable_Lock(xfc->railWindows);
 
#if defined(WITH_VERBOSE_WINPR_ASSERT)
  WINPR_ASSERT(!xfc->isRailWindowsLocked);
  xfc->isRailWindowsLocked = TRUE;
#endif
}
 
void xfAppWindowsUnlockFrom(xfContext* xfc, WINPR_ATTR_UNUSED const char* file,
                            WINPR_ATTR_UNUSED const char* fkt, WINPR_ATTR_UNUSED size_t line)
{
  WINPR_ASSERT(xfc);
 
#if defined(WITH_VERBOSE_WINPR_ASSERT)
  const DWORD level = WLOG_TRACE;
  if (WLog_IsLevelActive(xfc->log, level))
    WLog_PrintTextMessage(xfc->log, level, line, file, fkt, "[rails] unocking [%s]", fkt);
 
  WINPR_ASSERT(xfc->isRailWindowsLocked);
  xfc->isRailWindowsLocked = FALSE;
#endif
 
  if (xfc->railWindows)
    HashTable_Unlock(xfc->railWindows);
  xf_unlock_x11(xfc);
}