Unify Fx_focus_frame between all ports.

[bpt/emacs.git] / src / w32fns.c

/* Graphical user interface functions for the Microsoft Windows API.

Copyright (C) 1989, 1992-2013 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs 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 3 of the License, or
(at your option) any later version.

GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

/* Added by Kevin Gallo */

#include <config.h>

#include <signal.h>
#include <stdio.h>
#include <limits.h>
#include <errno.h>
#include <math.h>
#include <fcntl.h>
#include <unistd.h>

#include "lisp.h"
#include "w32term.h"
#include "frame.h"
#include "window.h"
#include "character.h"
#include "buffer.h"
#include "intervals.h"
#include "dispextern.h"
#include "keyboard.h"
#include "blockinput.h"
#include "epaths.h"
#include "charset.h"
#include "coding.h"
#include "ccl.h"
#include "fontset.h"
#include "systime.h"
#include "termhooks.h"

#include "w32common.h"

#ifdef WINDOWSNT
#include "w32heap.h"
#endif /* WINDOWSNT */

#if CYGWIN
#include "cygw32.h"
#else
#include "w32.h"
#endif

#include "bitmaps/gray.xbm"

#include <commctrl.h>
#include <commdlg.h>
#include <shellapi.h>
#include <ctype.h>
#include <winspool.h>
#include <objbase.h>

#include <dlgs.h>
#include <imm.h>

#include "font.h"
#include "w32font.h"

#ifndef FOF_NO_CONNECTED_ELEMENTS
#define FOF_NO_CONNECTED_ELEMENTS 0x2000
#endif

void syms_of_w32fns (void);
void globals_of_w32fns (void);

extern void free_frame_menubar (struct frame *);
extern int w32_console_toggle_lock_key (int, Lisp_Object);
extern void w32_menu_display_help (HWND, HMENU, UINT, UINT);
extern void w32_free_menu_strings (HWND);
extern const char *map_w32_filename (const char *, const char **);
extern char * w32_strerror (int error_no);

/* If non-NULL, a handle to a frame where to display the hourglass cursor.  */
static HWND hourglass_hwnd = NULL;

#ifndef IDC_HAND
#define IDC_HAND MAKEINTRESOURCE(32649)
#endif

Lisp_Object Qsuppress_icon;
Lisp_Object Qundefined_color;
Lisp_Object Qcancel_timer;
Lisp_Object Qfont_param;
Lisp_Object Qhyper;
Lisp_Object Qsuper;
Lisp_Object Qmeta;
Lisp_Object Qalt;
Lisp_Object Qctrl;
Lisp_Object Qcontrol;
Lisp_Object Qshift;
static Lisp_Object Qgeometry, Qworkarea, Qmm_size, Qframes;


/* Prefix for system colors.  */
#define SYSTEM_COLOR_PREFIX "System"
#define SYSTEM_COLOR_PREFIX_LEN (sizeof (SYSTEM_COLOR_PREFIX) - 1)

/* State variables for emulating a three button mouse. */
#define LMOUSE 1
#define MMOUSE 2
#define RMOUSE 4

static int button_state = 0;
static W32Msg saved_mouse_button_msg;
static unsigned mouse_button_timer = 0; /* non-zero when timer is active */
static W32Msg saved_mouse_move_msg;
static unsigned mouse_move_timer = 0;

/* Window that is tracking the mouse.  */
static HWND track_mouse_window;

/* Multi-monitor API definitions that are not pulled from the headers
   since we are compiling for NT 4.  */
#ifndef MONITOR_DEFAULT_TO_NEAREST
#define MONITOR_DEFAULT_TO_NEAREST 2
#endif
#ifndef MONITORINFOF_PRIMARY
#define MONITORINFOF_PRIMARY 1
#endif
#ifndef SM_XVIRTUALSCREEN
#define SM_XVIRTUALSCREEN 76
#endif
#ifndef SM_YVIRTUALSCREEN
#define SM_YVIRTUALSCREEN 77
#endif
/* MinGW headers define MONITORINFO unconditionally, but MSVC ones don't.
   To avoid a compile error on one or the other, redefine with a new name.  */
struct MONITOR_INFO
{
    DWORD   cbSize;
    RECT    rcMonitor;
    RECT    rcWork;
    DWORD   dwFlags;
};

#ifndef CCHDEVICENAME
#define CCHDEVICENAME 32
#endif
struct MONITOR_INFO_EX
{
    DWORD   cbSize;
    RECT    rcMonitor;
    RECT    rcWork;
    DWORD   dwFlags;
    char    szDevice[CCHDEVICENAME];
};

/* Reportedly, MSVC does not have this in its headers.  */
#if defined (_MSC_VER) && _WIN32_WINNT < 0x0500
DECLARE_HANDLE(HMONITOR);
#endif

typedef BOOL (WINAPI * TrackMouseEvent_Proc)
  (IN OUT LPTRACKMOUSEEVENT lpEventTrack);
typedef LONG (WINAPI * ImmGetCompositionString_Proc)
  (IN HIMC context, IN DWORD index, OUT LPVOID buffer, IN DWORD bufLen);
typedef HIMC (WINAPI * ImmGetContext_Proc) (IN HWND window);
typedef HWND (WINAPI * ImmReleaseContext_Proc) (IN HWND wnd, IN HIMC context);
typedef HWND (WINAPI * ImmSetCompositionWindow_Proc) (IN HIMC context,
                                                      IN COMPOSITIONFORM *form);
typedef HMONITOR (WINAPI * MonitorFromPoint_Proc) (IN POINT pt, IN DWORD flags);
typedef BOOL (WINAPI * GetMonitorInfo_Proc)
  (IN HMONITOR monitor, OUT struct MONITOR_INFO* info);
typedef HMONITOR (WINAPI * MonitorFromWindow_Proc)
  (IN HWND hwnd, IN DWORD dwFlags);
typedef BOOL CALLBACK (* MonitorEnum_Proc)
  (IN HMONITOR monitor, IN HDC hdc, IN RECT *rcMonitor, IN LPARAM dwData);
typedef BOOL (WINAPI * EnumDisplayMonitors_Proc)
  (IN HDC hdc, IN RECT *rcClip, IN MonitorEnum_Proc fnEnum, IN LPARAM dwData);

TrackMouseEvent_Proc track_mouse_event_fn = NULL;
ImmGetCompositionString_Proc get_composition_string_fn = NULL;
ImmGetContext_Proc get_ime_context_fn = NULL;
ImmReleaseContext_Proc release_ime_context_fn = NULL;
ImmSetCompositionWindow_Proc set_ime_composition_window_fn = NULL;
MonitorFromPoint_Proc monitor_from_point_fn = NULL;
GetMonitorInfo_Proc get_monitor_info_fn = NULL;
MonitorFromWindow_Proc monitor_from_window_fn = NULL;
EnumDisplayMonitors_Proc enum_display_monitors_fn = NULL;

#ifdef NTGUI_UNICODE
#define unicode_append_menu AppendMenuW
#else /* !NTGUI_UNICODE */
extern AppendMenuW_Proc unicode_append_menu;
#endif /* NTGUI_UNICODE */

/* Flag to selectively ignore WM_IME_CHAR messages.  */
static int ignore_ime_char = 0;

/* W95 mousewheel handler */
unsigned int msh_mousewheel = 0;

/* Timers */
#define MOUSE_BUTTON_ID 1
#define MOUSE_MOVE_ID   2
#define MENU_FREE_ID 3
/* The delay (milliseconds) before a menu is freed after WM_EXITMENULOOP
   is received.  */
#define MENU_FREE_DELAY 1000
static unsigned menu_free_timer = 0;

#ifdef GLYPH_DEBUG
static int image_cache_refcount, dpyinfo_refcount;
#endif

static HWND w32_visible_system_caret_hwnd;

static int w32_unicode_gui;

/* From w32menu.c  */
extern HMENU current_popup_menu;
static int menubar_in_use = 0;

/* From w32uniscribe.c  */
extern void syms_of_w32uniscribe (void);
extern int uniscribe_available;

/* Function prototypes for hourglass support.  */
static void w32_show_hourglass (struct frame *);
static void w32_hide_hourglass (void);

#ifdef WINDOWSNT
/* From w32inevt.c */
extern int faked_key;
#endif /* WINDOWSNT */

/* This gives us the page size and the size of the allocation unit on NT.  */
SYSTEM_INFO sysinfo_cache;

/* This gives us version, build, and platform identification.  */
OSVERSIONINFO osinfo_cache;

DWORD_PTR syspage_mask = 0;

/* The major and minor versions of NT.  */
int w32_major_version;
int w32_minor_version;
int w32_build_number;

/* Distinguish between Windows NT and Windows 95.  */
int os_subtype;

#ifdef HAVE_NTGUI
HINSTANCE hinst = NULL;
#endif

static unsigned int sound_type = 0xFFFFFFFF;
#define MB_EMACS_SILENT (0xFFFFFFFF - 1)

/* Let the user specify a display with a frame.
   nil stands for the selected frame--or, if that is not a w32 frame,
   the first display on the list.  */

struct w32_display_info *
check_x_display_info (Lisp_Object frame)
{
  if (NILP (frame))
    {
      struct frame *sf = XFRAME (selected_frame);

      if (FRAME_W32_P (sf) && FRAME_LIVE_P (sf))
        return FRAME_DISPLAY_INFO (sf);
      else
        return &one_w32_display_info;
    }
  else if (STRINGP (frame))
    return x_display_info_for_name (frame);
  else
    {
      struct frame *f;

      CHECK_LIVE_FRAME (frame);
      f = XFRAME (frame);
      if (! FRAME_W32_P (f))
        error ("Non-W32 frame used");
      return FRAME_DISPLAY_INFO (f);
    }
}
\f
/* Return the Emacs frame-object corresponding to an w32 window.
   It could be the frame's main window or an icon window.  */

struct frame *
x_window_to_frame (struct w32_display_info *dpyinfo, HWND wdesc)
{
  Lisp_Object tail, frame;
  struct frame *f;

  FOR_EACH_FRAME (tail, frame)
    {
      f = XFRAME (frame);
      if (!FRAME_W32_P (f) || FRAME_DISPLAY_INFO (f) != dpyinfo)
        continue;

      if (FRAME_W32_WINDOW (f) == wdesc)
        return f;
    }
  return 0;
}

\f
static Lisp_Object unwind_create_frame (Lisp_Object);
static void unwind_create_tip_frame (Lisp_Object);
static void my_create_window (struct frame *);
static void my_create_tip_window (struct frame *);

/* TODO: Native Input Method support; see x_create_im.  */
void x_set_foreground_color (struct frame *, Lisp_Object, Lisp_Object);
void x_set_background_color (struct frame *, Lisp_Object, Lisp_Object);
void x_set_mouse_color (struct frame *, Lisp_Object, Lisp_Object);
void x_set_cursor_color (struct frame *, Lisp_Object, Lisp_Object);
void x_set_border_color (struct frame *, Lisp_Object, Lisp_Object);
void x_set_cursor_type (struct frame *, Lisp_Object, Lisp_Object);
void x_set_icon_type (struct frame *, Lisp_Object, Lisp_Object);
void x_set_icon_name (struct frame *, Lisp_Object, Lisp_Object);
void x_explicitly_set_name (struct frame *, Lisp_Object, Lisp_Object);
void x_set_menu_bar_lines (struct frame *, Lisp_Object, Lisp_Object);
void x_set_title (struct frame *, Lisp_Object, Lisp_Object);
void x_set_tool_bar_lines (struct frame *, Lisp_Object, Lisp_Object);


\f

/* Store the screen positions of frame F into XPTR and YPTR.
   These are the positions of the containing window manager window,
   not Emacs's own window.  */

void
x_real_positions (struct frame *f, int *xptr, int *yptr)
{
  POINT pt;
  RECT rect;

  /* Get the bounds of the WM window.  */
  GetWindowRect (FRAME_W32_WINDOW (f), &rect);

  pt.x = 0;
  pt.y = 0;

  /* Convert (0, 0) in the client area to screen co-ordinates.  */
  ClientToScreen (FRAME_W32_WINDOW (f), &pt);

  /* Remember x_pixels_diff and y_pixels_diff.  */
  f->x_pixels_diff = pt.x - rect.left;
  f->y_pixels_diff = pt.y - rect.top;

  *xptr = rect.left;
  *yptr = rect.top;
}

/* Returns the window rectangle appropriate for the given fullscreen mode.
   The normal rect parameter was the window's rectangle prior to entering
   fullscreen mode.  If multiple monitor support is available, the nearest
   monitor to the window is chosen.  */

void
w32_fullscreen_rect (HWND hwnd, int fsmode, RECT normal, RECT *rect)
{
  struct MONITOR_INFO mi = { sizeof(mi) };
  if (monitor_from_window_fn && get_monitor_info_fn)
    {
      HMONITOR monitor =
        monitor_from_window_fn (hwnd, MONITOR_DEFAULT_TO_NEAREST);
      get_monitor_info_fn (monitor, &mi);
    }
  else
    {
      mi.rcMonitor.left = 0;
      mi.rcMonitor.top = 0;
      mi.rcMonitor.right = GetSystemMetrics (SM_CXSCREEN);
      mi.rcMonitor.bottom = GetSystemMetrics (SM_CYSCREEN);
      mi.rcWork.left = 0;
      mi.rcWork.top = 0;
      mi.rcWork.right = GetSystemMetrics (SM_CXMAXIMIZED);
      mi.rcWork.bottom = GetSystemMetrics (SM_CYMAXIMIZED);
    }

  switch (fsmode)
    {
    case FULLSCREEN_BOTH:
      rect->left = mi.rcMonitor.left;
      rect->top = mi.rcMonitor.top;
      rect->right = mi.rcMonitor.right;
      rect->bottom = mi.rcMonitor.bottom;
      break;
    case FULLSCREEN_MAXIMIZED:
      rect->left = mi.rcWork.left;
      rect->top = mi.rcWork.top;
      rect->right = mi.rcWork.right;
      rect->bottom = mi.rcWork.bottom;
      break;
    case FULLSCREEN_WIDTH:
      rect->left = mi.rcWork.left;
      rect->top = normal.top;
      rect->right = mi.rcWork.right;
      rect->bottom = normal.bottom;
      break;
    case FULLSCREEN_HEIGHT:
      rect->left = normal.left;
      rect->top = mi.rcWork.top;
      rect->right = normal.right;
      rect->bottom = mi.rcWork.bottom;
      break;
    case FULLSCREEN_NONE:
    default:
      *rect = normal;
      break;
    }
}

\f

DEFUN ("w32-define-rgb-color", Fw32_define_rgb_color,
       Sw32_define_rgb_color, 4, 4, 0,
       doc: /* Convert RGB numbers to a Windows color reference and associate with NAME.
This adds or updates a named color to `w32-color-map', making it
available for use.  The original entry's RGB ref is returned, or nil
if the entry is new.  */)
  (Lisp_Object red, Lisp_Object green, Lisp_Object blue, Lisp_Object name)
{
  Lisp_Object rgb;
  Lisp_Object oldrgb = Qnil;
  Lisp_Object entry;

  CHECK_NUMBER (red);
  CHECK_NUMBER (green);
  CHECK_NUMBER (blue);
  CHECK_STRING (name);

  XSETINT (rgb, RGB (XUINT (red), XUINT (green), XUINT (blue)));

  block_input ();

  /* replace existing entry in w32-color-map or add new entry. */
  entry = Fassoc (name, Vw32_color_map);
  if (NILP (entry))
    {
      entry = Fcons (name, rgb);
      Vw32_color_map = Fcons (entry, Vw32_color_map);
    }
  else
    {
      oldrgb = Fcdr (entry);
      Fsetcdr (entry, rgb);
    }

  unblock_input ();

  return (oldrgb);
}

/* The default colors for the w32 color map */
typedef struct colormap_t
{
  char *name;
  COLORREF colorref;
} colormap_t;

colormap_t w32_color_map[] =
{
  {"snow"                      , PALETTERGB (255,250,250)},
  {"ghost white"               , PALETTERGB (248,248,255)},
  {"GhostWhite"                , PALETTERGB (248,248,255)},
  {"white smoke"               , PALETTERGB (245,245,245)},
  {"WhiteSmoke"                , PALETTERGB (245,245,245)},
  {"gainsboro"                 , PALETTERGB (220,220,220)},
  {"floral white"              , PALETTERGB (255,250,240)},
  {"FloralWhite"               , PALETTERGB (255,250,240)},
  {"old lace"                  , PALETTERGB (253,245,230)},
  {"OldLace"                   , PALETTERGB (253,245,230)},
  {"linen"                     , PALETTERGB (250,240,230)},
  {"antique white"             , PALETTERGB (250,235,215)},
  {"AntiqueWhite"              , PALETTERGB (250,235,215)},
  {"papaya whip"               , PALETTERGB (255,239,213)},
  {"PapayaWhip"                , PALETTERGB (255,239,213)},
  {"blanched almond"           , PALETTERGB (255,235,205)},
  {"BlanchedAlmond"            , PALETTERGB (255,235,205)},
  {"bisque"                    , PALETTERGB (255,228,196)},
  {"peach puff"                , PALETTERGB (255,218,185)},
  {"PeachPuff"                 , PALETTERGB (255,218,185)},
  {"navajo white"              , PALETTERGB (255,222,173)},
  {"NavajoWhite"               , PALETTERGB (255,222,173)},
  {"moccasin"                  , PALETTERGB (255,228,181)},
  {"cornsilk"                  , PALETTERGB (255,248,220)},
  {"ivory"                     , PALETTERGB (255,255,240)},
  {"lemon chiffon"             , PALETTERGB (255,250,205)},
  {"LemonChiffon"              , PALETTERGB (255,250,205)},
  {"seashell"                  , PALETTERGB (255,245,238)},
  {"honeydew"                  , PALETTERGB (240,255,240)},
  {"mint cream"                , PALETTERGB (245,255,250)},
  {"MintCream"                 , PALETTERGB (245,255,250)},
  {"azure"                     , PALETTERGB (240,255,255)},
  {"alice blue"                , PALETTERGB (240,248,255)},
  {"AliceBlue"                 , PALETTERGB (240,248,255)},
  {"lavender"                  , PALETTERGB (230,230,250)},
  {"lavender blush"            , PALETTERGB (255,240,245)},
  {"LavenderBlush"             , PALETTERGB (255,240,245)},
  {"misty rose"                , PALETTERGB (255,228,225)},
  {"MistyRose"                 , PALETTERGB (255,228,225)},
  {"white"                     , PALETTERGB (255,255,255)},
  {"black"                     , PALETTERGB (  0,  0,  0)},
  {"dark slate gray"           , PALETTERGB ( 47, 79, 79)},
  {"DarkSlateGray"             , PALETTERGB ( 47, 79, 79)},
  {"dark slate grey"           , PALETTERGB ( 47, 79, 79)},
  {"DarkSlateGrey"             , PALETTERGB ( 47, 79, 79)},
  {"dim gray"                  , PALETTERGB (105,105,105)},
  {"DimGray"                   , PALETTERGB (105,105,105)},
  {"dim grey"                  , PALETTERGB (105,105,105)},
  {"DimGrey"                   , PALETTERGB (105,105,105)},
  {"slate gray"                , PALETTERGB (112,128,144)},
  {"SlateGray"                 , PALETTERGB (112,128,144)},
  {"slate grey"                , PALETTERGB (112,128,144)},
  {"SlateGrey"                 , PALETTERGB (112,128,144)},
  {"light slate gray"          , PALETTERGB (119,136,153)},
  {"LightSlateGray"            , PALETTERGB (119,136,153)},
  {"light slate grey"          , PALETTERGB (119,136,153)},
  {"LightSlateGrey"            , PALETTERGB (119,136,153)},
  {"gray"                      , PALETTERGB (190,190,190)},
  {"grey"                      , PALETTERGB (190,190,190)},
  {"light grey"                , PALETTERGB (211,211,211)},
  {"LightGrey"                 , PALETTERGB (211,211,211)},
  {"light gray"                , PALETTERGB (211,211,211)},
  {"LightGray"                 , PALETTERGB (211,211,211)},
  {"midnight blue"             , PALETTERGB ( 25, 25,112)},
  {"MidnightBlue"              , PALETTERGB ( 25, 25,112)},
  {"navy"                      , PALETTERGB (  0,  0,128)},
  {"navy blue"                 , PALETTERGB (  0,  0,128)},
  {"NavyBlue"                  , PALETTERGB (  0,  0,128)},
  {"cornflower blue"           , PALETTERGB (100,149,237)},
  {"CornflowerBlue"            , PALETTERGB (100,149,237)},
  {"dark slate blue"           , PALETTERGB ( 72, 61,139)},
  {"DarkSlateBlue"             , PALETTERGB ( 72, 61,139)},
  {"slate blue"                , PALETTERGB (106, 90,205)},
  {"SlateBlue"                 , PALETTERGB (106, 90,205)},
  {"medium slate blue"         , PALETTERGB (123,104,238)},
  {"MediumSlateBlue"           , PALETTERGB (123,104,238)},
  {"light slate blue"          , PALETTERGB (132,112,255)},
  {"LightSlateBlue"            , PALETTERGB (132,112,255)},
  {"medium blue"               , PALETTERGB (  0,  0,205)},
  {"MediumBlue"                , PALETTERGB (  0,  0,205)},
  {"royal blue"                , PALETTERGB ( 65,105,225)},
  {"RoyalBlue"                 , PALETTERGB ( 65,105,225)},
  {"blue"                      , PALETTERGB (  0,  0,255)},
  {"dodger blue"               , PALETTERGB ( 30,144,255)},
  {"DodgerBlue"                , PALETTERGB ( 30,144,255)},
  {"deep sky blue"             , PALETTERGB (  0,191,255)},
  {"DeepSkyBlue"               , PALETTERGB (  0,191,255)},
  {"sky blue"                  , PALETTERGB (135,206,235)},
  {"SkyBlue"                   , PALETTERGB (135,206,235)},
  {"light sky blue"            , PALETTERGB (135,206,250)},
  {"LightSkyBlue"              , PALETTERGB (135,206,250)},
  {"steel blue"                , PALETTERGB ( 70,130,180)},
  {"SteelBlue"                 , PALETTERGB ( 70,130,180)},
  {"light steel blue"          , PALETTERGB (176,196,222)},
  {"LightSteelBlue"            , PALETTERGB (176,196,222)},
  {"light blue"                , PALETTERGB (173,216,230)},
  {"LightBlue"                 , PALETTERGB (173,216,230)},
  {"powder blue"               , PALETTERGB (176,224,230)},
  {"PowderBlue"                , PALETTERGB (176,224,230)},
  {"pale turquoise"            , PALETTERGB (175,238,238)},
  {"PaleTurquoise"             , PALETTERGB (175,238,238)},
  {"dark turquoise"            , PALETTERGB (  0,206,209)},
  {"DarkTurquoise"             , PALETTERGB (  0,206,209)},
  {"medium turquoise"          , PALETTERGB ( 72,209,204)},
  {"MediumTurquoise"           , PALETTERGB ( 72,209,204)},
  {"turquoise"                 , PALETTERGB ( 64,224,208)},
  {"cyan"                      , PALETTERGB (  0,255,255)},
  {"light cyan"                , PALETTERGB (224,255,255)},
  {"LightCyan"                 , PALETTERGB (224,255,255)},
  {"cadet blue"                , PALETTERGB ( 95,158,160)},
  {"CadetBlue"                 , PALETTERGB ( 95,158,160)},
  {"medium aquamarine"         , PALETTERGB (102,205,170)},
  {"MediumAquamarine"          , PALETTERGB (102,205,170)},
  {"aquamarine"                , PALETTERGB (127,255,212)},
  {"dark green"                , PALETTERGB (  0,100,  0)},
  {"DarkGreen"                 , PALETTERGB (  0,100,  0)},
  {"dark olive green"          , PALETTERGB ( 85,107, 47)},
  {"DarkOliveGreen"            , PALETTERGB ( 85,107, 47)},
  {"dark sea green"            , PALETTERGB (143,188,143)},
  {"DarkSeaGreen"              , PALETTERGB (143,188,143)},
  {"sea green"                 , PALETTERGB ( 46,139, 87)},
  {"SeaGreen"                  , PALETTERGB ( 46,139, 87)},
  {"medium sea green"          , PALETTERGB ( 60,179,113)},
  {"MediumSeaGreen"            , PALETTERGB ( 60,179,113)},
  {"light sea green"           , PALETTERGB ( 32,178,170)},
  {"LightSeaGreen"             , PALETTERGB ( 32,178,170)},
  {"pale green"                , PALETTERGB (152,251,152)},
  {"PaleGreen"                 , PALETTERGB (152,251,152)},
  {"spring green"              , PALETTERGB (  0,255,127)},
  {"SpringGreen"               , PALETTERGB (  0,255,127)},
  {"lawn green"                , PALETTERGB (124,252,  0)},
  {"LawnGreen"                 , PALETTERGB (124,252,  0)},
  {"green"                     , PALETTERGB (  0,255,  0)},
  {"chartreuse"                , PALETTERGB (127,255,  0)},
  {"medium spring green"       , PALETTERGB (  0,250,154)},
  {"MediumSpringGreen"         , PALETTERGB (  0,250,154)},
  {"green yellow"              , PALETTERGB (173,255, 47)},
  {"GreenYellow"               , PALETTERGB (173,255, 47)},
  {"lime green"                , PALETTERGB ( 50,205, 50)},
  {"LimeGreen"                 , PALETTERGB ( 50,205, 50)},
  {"yellow green"              , PALETTERGB (154,205, 50)},
  {"YellowGreen"               , PALETTERGB (154,205, 50)},
  {"forest green"              , PALETTERGB ( 34,139, 34)},
  {"ForestGreen"               , PALETTERGB ( 34,139, 34)},
  {"olive drab"                , PALETTERGB (107,142, 35)},
  {"OliveDrab"                 , PALETTERGB (107,142, 35)},
  {"dark khaki"                , PALETTERGB (189,183,107)},
  {"DarkKhaki"                 , PALETTERGB (189,183,107)},
  {"khaki"                     , PALETTERGB (240,230,140)},
  {"pale goldenrod"            , PALETTERGB (238,232,170)},
  {"PaleGoldenrod"             , PALETTERGB (238,232,170)},
  {"light goldenrod yellow"    , PALETTERGB (250,250,210)},
  {"LightGoldenrodYellow"      , PALETTERGB (250,250,210)},
  {"light yellow"              , PALETTERGB (255,255,224)},
  {"LightYellow"               , PALETTERGB (255,255,224)},
  {"yellow"                    , PALETTERGB (255,255,  0)},
  {"gold"                      , PALETTERGB (255,215,  0)},
  {"light goldenrod"           , PALETTERGB (238,221,130)},
  {"LightGoldenrod"            , PALETTERGB (238,221,130)},
  {"goldenrod"                 , PALETTERGB (218,165, 32)},
  {"dark goldenrod"            , PALETTERGB (184,134, 11)},
  {"DarkGoldenrod"             , PALETTERGB (184,134, 11)},
  {"rosy brown"                , PALETTERGB (188,143,143)},
  {"RosyBrown"                 , PALETTERGB (188,143,143)},
  {"indian red"                , PALETTERGB (205, 92, 92)},
  {"IndianRed"                 , PALETTERGB (205, 92, 92)},
  {"saddle brown"              , PALETTERGB (139, 69, 19)},
  {"SaddleBrown"               , PALETTERGB (139, 69, 19)},
  {"sienna"                    , PALETTERGB (160, 82, 45)},
  {"peru"                      , PALETTERGB (205,133, 63)},
  {"burlywood"                 , PALETTERGB (222,184,135)},
  {"beige"                     , PALETTERGB (245,245,220)},
  {"wheat"                     , PALETTERGB (245,222,179)},
  {"sandy brown"               , PALETTERGB (244,164, 96)},
  {"SandyBrown"                , PALETTERGB (244,164, 96)},
  {"tan"                       , PALETTERGB (210,180,140)},
  {"chocolate"                 , PALETTERGB (210,105, 30)},
  {"firebrick"                 , PALETTERGB (178,34, 34)},
  {"brown"                     , PALETTERGB (165,42, 42)},
  {"dark salmon"               , PALETTERGB (233,150,122)},
  {"DarkSalmon"                , PALETTERGB (233,150,122)},
  {"salmon"                    , PALETTERGB (250,128,114)},
  {"light salmon"              , PALETTERGB (255,160,122)},
  {"LightSalmon"               , PALETTERGB (255,160,122)},
  {"orange"                    , PALETTERGB (255,165,  0)},
  {"dark orange"               , PALETTERGB (255,140,  0)},
  {"DarkOrange"                , PALETTERGB (255,140,  0)},
  {"coral"                     , PALETTERGB (255,127, 80)},
  {"light coral"               , PALETTERGB (240,128,128)},
  {"LightCoral"                , PALETTERGB (240,128,128)},
  {"tomato"                    , PALETTERGB (255, 99, 71)},
  {"orange red"                , PALETTERGB (255, 69,  0)},
  {"OrangeRed"                 , PALETTERGB (255, 69,  0)},
  {"red"                       , PALETTERGB (255,  0,  0)},
  {"hot pink"                  , PALETTERGB (255,105,180)},
  {"HotPink"                   , PALETTERGB (255,105,180)},
  {"deep pink"                 , PALETTERGB (255, 20,147)},
  {"DeepPink"                  , PALETTERGB (255, 20,147)},
  {"pink"                      , PALETTERGB (255,192,203)},
  {"light pink"                , PALETTERGB (255,182,193)},
  {"LightPink"                 , PALETTERGB (255,182,193)},
  {"pale violet red"           , PALETTERGB (219,112,147)},
  {"PaleVioletRed"             , PALETTERGB (219,112,147)},
  {"maroon"                    , PALETTERGB (176, 48, 96)},
  {"medium violet red"         , PALETTERGB (199, 21,133)},
  {"MediumVioletRed"           , PALETTERGB (199, 21,133)},
  {"violet red"                , PALETTERGB (208, 32,144)},
  {"VioletRed"                 , PALETTERGB (208, 32,144)},
  {"magenta"                   , PALETTERGB (255,  0,255)},
  {"violet"                    , PALETTERGB (238,130,238)},
  {"plum"                      , PALETTERGB (221,160,221)},
  {"orchid"                    , PALETTERGB (218,112,214)},
  {"medium orchid"             , PALETTERGB (186, 85,211)},
  {"MediumOrchid"              , PALETTERGB (186, 85,211)},
  {"dark orchid"               , PALETTERGB (153, 50,204)},
  {"DarkOrchid"                , PALETTERGB (153, 50,204)},
  {"dark violet"               , PALETTERGB (148,  0,211)},
  {"DarkViolet"                , PALETTERGB (148,  0,211)},
  {"blue violet"               , PALETTERGB (138, 43,226)},
  {"BlueViolet"                , PALETTERGB (138, 43,226)},
  {"purple"                    , PALETTERGB (160, 32,240)},
  {"medium purple"             , PALETTERGB (147,112,219)},
  {"MediumPurple"              , PALETTERGB (147,112,219)},
  {"thistle"                   , PALETTERGB (216,191,216)},
  {"gray0"                     , PALETTERGB (  0,  0,  0)},
  {"grey0"                     , PALETTERGB (  0,  0,  0)},
  {"dark grey"                 , PALETTERGB (169,169,169)},
  {"DarkGrey"                  , PALETTERGB (169,169,169)},
  {"dark gray"                 , PALETTERGB (169,169,169)},
  {"DarkGray"                  , PALETTERGB (169,169,169)},
  {"dark blue"                 , PALETTERGB (  0,  0,139)},
  {"DarkBlue"                  , PALETTERGB (  0,  0,139)},
  {"dark cyan"                 , PALETTERGB (  0,139,139)},
  {"DarkCyan"                  , PALETTERGB (  0,139,139)},
  {"dark magenta"              , PALETTERGB (139,  0,139)},
  {"DarkMagenta"               , PALETTERGB (139,  0,139)},
  {"dark red"                  , PALETTERGB (139,  0,  0)},
  {"DarkRed"                   , PALETTERGB (139,  0,  0)},
  {"light green"               , PALETTERGB (144,238,144)},
  {"LightGreen"                , PALETTERGB (144,238,144)},
};

static Lisp_Object
w32_default_color_map (void)
{
  int i;
  colormap_t *pc = w32_color_map;
  Lisp_Object cmap;

  block_input ();

  cmap = Qnil;

  for (i = 0; i < sizeof (w32_color_map) / sizeof (w32_color_map[0]);
       pc++, i++)
    cmap = Fcons (Fcons (build_string (pc->name),
                         make_number (pc->colorref)),
                  cmap);

  unblock_input ();

  return (cmap);
}

DEFUN ("w32-default-color-map", Fw32_default_color_map, Sw32_default_color_map,
       0, 0, 0, doc: /* Return the default color map.  */)
  (void)
{
  return w32_default_color_map ();
}

static Lisp_Object
w32_color_map_lookup (const char *colorname)
{
  Lisp_Object tail, ret = Qnil;

  block_input ();

  for (tail = Vw32_color_map; CONSP (tail); tail = XCDR (tail))
    {
      register Lisp_Object elt, tem;

      elt = XCAR (tail);
      if (!CONSP (elt)) continue;

      tem = XCAR (elt);

      if (lstrcmpi (SDATA (tem), colorname) == 0)
        {
          ret = Fcdr (elt);
          break;
        }

      QUIT;
    }

  unblock_input ();

  return ret;
}


static void
add_system_logical_colors_to_map (Lisp_Object *system_colors)
{
  HKEY colors_key;

  /* Other registry operations are done with input blocked.  */
  block_input ();

  /* Look for "Control Panel/Colors" under User and Machine registry
     settings.  */
  if (RegOpenKeyEx (HKEY_CURRENT_USER, "Control Panel\\Colors", 0,
                    KEY_READ, &colors_key) == ERROR_SUCCESS
      || RegOpenKeyEx (HKEY_LOCAL_MACHINE, "Control Panel\\Colors", 0,
                       KEY_READ, &colors_key) == ERROR_SUCCESS)
    {
      /* List all keys.  */
      char color_buffer[64];
      char full_name_buffer[MAX_PATH + SYSTEM_COLOR_PREFIX_LEN];
      int index = 0;
      DWORD name_size, color_size;
      char *name_buffer = full_name_buffer + SYSTEM_COLOR_PREFIX_LEN;

      name_size = sizeof (full_name_buffer) - SYSTEM_COLOR_PREFIX_LEN;
      color_size = sizeof (color_buffer);

      strcpy (full_name_buffer, SYSTEM_COLOR_PREFIX);

      while (RegEnumValueA (colors_key, index, name_buffer, &name_size,
                            NULL, NULL, color_buffer, &color_size)
             == ERROR_SUCCESS)
        {
          int r, g, b;
          if (sscanf (color_buffer, " %u %u %u", &r, &g, &b) == 3)
            *system_colors = Fcons (Fcons (build_string (full_name_buffer),
                                           make_number (RGB (r, g, b))),
                                    *system_colors);

          name_size = sizeof (full_name_buffer) - SYSTEM_COLOR_PREFIX_LEN;
          color_size = sizeof (color_buffer);
          index++;
        }
      RegCloseKey (colors_key);
    }

  unblock_input ();
}


static Lisp_Object
x_to_w32_color (const char * colorname)
{
  register Lisp_Object ret = Qnil;

  block_input ();

  if (colorname[0] == '#')
    {
      /* Could be an old-style RGB Device specification.  */
      int size = strlen (colorname + 1);
      char *color = alloca (size + 1);

      strcpy (color, colorname + 1);
      if (size == 3 || size == 6 || size == 9 || size == 12)
        {
          UINT colorval;
          int i, pos;
          pos = 0;
          size /= 3;
          colorval = 0;

          for (i = 0; i < 3; i++)
            {
              char *end;
              char t;
              unsigned long value;

              /* The check for 'x' in the following conditional takes into
                 account the fact that strtol allows a "0x" in front of
                 our numbers, and we don't.  */
              if (!isxdigit (color[0]) || color[1] == 'x')
                break;
              t = color[size];
              color[size] = '\0';
              value = strtoul (color, &end, 16);
              color[size] = t;
              if (errno == ERANGE || end - color != size)
                break;
              switch (size)
                {
                case 1:
                  value = value * 0x10;
                  break;
                case 2:
                  break;
                case 3:
                  value /= 0x10;
                  break;
                case 4:
                  value /= 0x100;
                  break;
                }
              colorval |= (value << pos);
              pos += 0x8;
              if (i == 2)
                {
                  unblock_input ();
                  XSETINT (ret, colorval);
                  return ret;
                }
              color = end;
            }
        }
    }
  else if (strnicmp (colorname, "rgb:", 4) == 0)
    {
      const char *color;
      UINT colorval;
      int i, pos;
      pos = 0;

      colorval = 0;
      color = colorname + 4;
      for (i = 0; i < 3; i++)
        {
          char *end;
          unsigned long value;

          /* The check for 'x' in the following conditional takes into
             account the fact that strtol allows a "0x" in front of
             our numbers, and we don't.  */
          if (!isxdigit (color[0]) || color[1] == 'x')
            break;
          value = strtoul (color, &end, 16);
          if (errno == ERANGE)
            break;
          switch (end - color)
            {
            case 1:
              value = value * 0x10 + value;
              break;
            case 2:
              break;
            case 3:
              value /= 0x10;
              break;
            case 4:
              value /= 0x100;
              break;
            default:
              value = ULONG_MAX;
            }
          if (value == ULONG_MAX)
            break;
          colorval |= (value << pos);
          pos += 0x8;
          if (i == 2)
            {
              if (*end != '\0')
                break;
              unblock_input ();
              XSETINT (ret, colorval);
              return ret;
            }
          if (*end != '/')
            break;
          color = end + 1;
        }
    }
  else if (strnicmp (colorname, "rgbi:", 5) == 0)
    {
      /* This is an RGB Intensity specification.  */
      const char *color;
      UINT colorval;
      int i, pos;
      pos = 0;

      colorval = 0;
      color = colorname + 5;
      for (i = 0; i < 3; i++)
        {
          char *end;
          double value;
          UINT val;

          value = strtod (color, &end);
          if (errno == ERANGE)
            break;
          if (value < 0.0 || value > 1.0)
            break;
          val = (UINT)(0x100 * value);
          /* We used 0x100 instead of 0xFF to give a continuous
             range between 0.0 and 1.0 inclusive.  The next statement
             fixes the 1.0 case.  */
          if (val == 0x100)
            val = 0xFF;
          colorval |= (val << pos);
          pos += 0x8;
          if (i == 2)
            {
              if (*end != '\0')
                break;
              unblock_input ();
              XSETINT (ret, colorval);
              return ret;
            }
          if (*end != '/')
            break;
          color = end + 1;
        }
    }
  /* I am not going to attempt to handle any of the CIE color schemes
     or TekHVC, since I don't know the algorithms for conversion to
     RGB.  */

  /* If we fail to lookup the color name in w32_color_map, then check the
     colorname to see if it can be crudely approximated: If the X color
     ends in a number (e.g., "darkseagreen2"), strip the number and
     return the result of looking up the base color name.  */
  ret = w32_color_map_lookup (colorname);
  if (NILP (ret))
    {
      int len = strlen (colorname);

      if (isdigit (colorname[len - 1]))
        {
          char *ptr, *approx = alloca (len + 1);

          strcpy (approx, colorname);
          ptr = &approx[len - 1];
          while (ptr > approx && isdigit (*ptr))
              *ptr-- = '\0';

          ret = w32_color_map_lookup (approx);
        }
    }

  unblock_input ();
  return ret;
}

void
w32_regenerate_palette (struct frame *f)
{
  struct w32_palette_entry * list;
  LOGPALETTE *          log_palette;
  HPALETTE              new_palette;
  int                   i;

  /* don't bother trying to create palette if not supported */
  if (! FRAME_DISPLAY_INFO (f)->has_palette)
    return;

  log_palette = (LOGPALETTE *)
    alloca (sizeof (LOGPALETTE) +
             FRAME_DISPLAY_INFO (f)->num_colors * sizeof (PALETTEENTRY));
  log_palette->palVersion = 0x300;
  log_palette->palNumEntries = FRAME_DISPLAY_INFO (f)->num_colors;

  list = FRAME_DISPLAY_INFO (f)->color_list;
  for (i = 0;
       i < FRAME_DISPLAY_INFO (f)->num_colors;
       i++, list = list->next)
    log_palette->palPalEntry[i] = list->entry;

  new_palette = CreatePalette (log_palette);

  enter_crit ();

  if (FRAME_DISPLAY_INFO (f)->palette)
    DeleteObject (FRAME_DISPLAY_INFO (f)->palette);
  FRAME_DISPLAY_INFO (f)->palette = new_palette;

  /* Realize display palette and garbage all frames. */
  release_frame_dc (f, get_frame_dc (f));

  leave_crit ();
}

#define W32_COLOR(pe)  RGB (pe.peRed, pe.peGreen, pe.peBlue)
#define SET_W32_COLOR(pe, color) \
  do \
    { \
      pe.peRed = GetRValue (color); \
      pe.peGreen = GetGValue (color); \
      pe.peBlue = GetBValue (color); \
      pe.peFlags = 0; \
    } while (0)

#if 0
/* Keep these around in case we ever want to track color usage. */
void
w32_map_color (struct frame *f, COLORREF color)
{
  struct w32_palette_entry * list = FRAME_DISPLAY_INFO (f)->color_list;

  if (NILP (Vw32_enable_palette))
    return;

  /* check if color is already mapped */
  while (list)
    {
      if (W32_COLOR (list->entry) == color)
        {
          ++list->refcount;
          return;
        }
      list = list->next;
    }

  /* not already mapped, so add to list and recreate Windows palette */
  list = xmalloc (sizeof (struct w32_palette_entry));
  SET_W32_COLOR (list->entry, color);
  list->refcount = 1;
  list->next = FRAME_DISPLAY_INFO (f)->color_list;
  FRAME_DISPLAY_INFO (f)->color_list = list;
  FRAME_DISPLAY_INFO (f)->num_colors++;

  /* set flag that palette must be regenerated */
  FRAME_DISPLAY_INFO (f)->regen_palette = TRUE;
}

void
w32_unmap_color (struct frame *f, COLORREF color)
{
  struct w32_palette_entry * list = FRAME_DISPLAY_INFO (f)->color_list;
  struct w32_palette_entry **prev = &FRAME_DISPLAY_INFO (f)->color_list;

  if (NILP (Vw32_enable_palette))
    return;

  /* check if color is already mapped */
  while (list)
    {
      if (W32_COLOR (list->entry) == color)
        {
          if (--list->refcount == 0)
            {
              *prev = list->next;
              xfree (list);
              FRAME_DISPLAY_INFO (f)->num_colors--;
              break;
            }
          else
            return;
        }
      prev = &list->next;
      list = list->next;
    }

  /* set flag that palette must be regenerated */
  FRAME_DISPLAY_INFO (f)->regen_palette = TRUE;
}
#endif


/* Gamma-correct COLOR on frame F.  */

void
gamma_correct (struct frame *f, COLORREF *color)
{
  if (f->gamma)
    {
      *color = PALETTERGB (
        pow (GetRValue (*color) / 255.0, f->gamma) * 255.0 + 0.5,
        pow (GetGValue (*color) / 255.0, f->gamma) * 255.0 + 0.5,
        pow (GetBValue (*color) / 255.0, f->gamma) * 255.0 + 0.5);
    }
}


/* Decide if color named COLOR is valid for the display associated with
   the selected frame; if so, return the rgb values in COLOR_DEF.
   If ALLOC is nonzero, allocate a new colormap cell.  */

int
w32_defined_color (struct frame *f, const char *color, XColor *color_def, int alloc)
{
  register Lisp_Object tem;
  COLORREF w32_color_ref;

  tem = x_to_w32_color (color);

  if (!NILP (tem))
    {
      if (f)
        {
          /* Apply gamma correction.  */
          w32_color_ref = XUINT (tem);
          gamma_correct (f, &w32_color_ref);
          XSETINT (tem, w32_color_ref);
        }

      /* Map this color to the palette if it is enabled. */
      if (!NILP (Vw32_enable_palette))
        {
          struct w32_palette_entry * entry =
            one_w32_display_info.color_list;
          struct w32_palette_entry ** prev =
            &one_w32_display_info.color_list;

          /* check if color is already mapped */
          while (entry)
            {
              if (W32_COLOR (entry->entry) == XUINT (tem))
                break;
              prev = &entry->next;
              entry = entry->next;
            }

          if (entry == NULL && alloc)
            {
              /* not already mapped, so add to list */
              entry = xmalloc (sizeof (struct w32_palette_entry));
              SET_W32_COLOR (entry->entry, XUINT (tem));
              entry->next = NULL;
              *prev = entry;
              one_w32_display_info.num_colors++;

              /* set flag that palette must be regenerated */
              one_w32_display_info.regen_palette = TRUE;
            }
        }
      /* Ensure COLORREF value is snapped to nearest color in (default)
         palette by simulating the PALETTERGB macro.  This works whether
         or not the display device has a palette. */
      w32_color_ref = XUINT (tem) | 0x2000000;

      color_def->pixel = w32_color_ref;
      color_def->red = GetRValue (w32_color_ref) * 256;
      color_def->green = GetGValue (w32_color_ref) * 256;
      color_def->blue = GetBValue (w32_color_ref) * 256;

      return 1;
    }
  else
    {
      return 0;
    }
}

/* Given a string ARG naming a color, compute a pixel value from it
   suitable for screen F.
   If F is not a color screen, return DEF (default) regardless of what
   ARG says.  */

int
x_decode_color (struct frame *f, Lisp_Object arg, int def)
{
  XColor cdef;

  CHECK_STRING (arg);

  if (strcmp (SDATA (arg), "black") == 0)
    return BLACK_PIX_DEFAULT (f);
  else if (strcmp (SDATA (arg), "white") == 0)
    return WHITE_PIX_DEFAULT (f);

  if ((FRAME_DISPLAY_INFO (f)->n_planes * FRAME_DISPLAY_INFO (f)->n_cbits) == 1)
    return def;

  /* w32_defined_color is responsible for coping with failures
     by looking for a near-miss.  */
  if (w32_defined_color (f, SDATA (arg), &cdef, 1))
    return cdef.pixel;

  /* defined_color failed; return an ultimate default.  */
  return def;
}
\f


/* Functions called only from `x_set_frame_param'
   to set individual parameters.

   If FRAME_W32_WINDOW (f) is 0,
   the frame is being created and its window does not exist yet.
   In that case, just record the parameter's new value
   in the standard place; do not attempt to change the window.  */

void
x_set_foreground_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  struct w32_output *x = f->output_data.w32;
  PIX_TYPE fg, old_fg;

  fg = x_decode_color (f, arg, BLACK_PIX_DEFAULT (f));
  old_fg = FRAME_FOREGROUND_PIXEL (f);
  FRAME_FOREGROUND_PIXEL (f) = fg;

  if (FRAME_W32_WINDOW (f) != 0)
    {
      if (x->cursor_pixel == old_fg)
        {
          x->cursor_pixel = fg;
          x->cursor_gc->background = fg;
        }

      update_face_from_frame_parameter (f, Qforeground_color, arg);
      if (FRAME_VISIBLE_P (f))
        redraw_frame (f);
    }
}

void
x_set_background_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  FRAME_BACKGROUND_PIXEL (f)
    = x_decode_color (f, arg, WHITE_PIX_DEFAULT (f));

  if (FRAME_W32_WINDOW (f) != 0)
    {
      SetWindowLong (FRAME_W32_WINDOW (f), WND_BACKGROUND_INDEX,
                     FRAME_BACKGROUND_PIXEL (f));

      update_face_from_frame_parameter (f, Qbackground_color, arg);

      if (FRAME_VISIBLE_P (f))
        redraw_frame (f);
    }
}

void
x_set_mouse_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  Cursor cursor, nontext_cursor, mode_cursor, hand_cursor;
  int count;
  int mask_color;

  if (!EQ (Qnil, arg))
    f->output_data.w32->mouse_pixel
      = x_decode_color (f, arg, BLACK_PIX_DEFAULT (f));
  mask_color = FRAME_BACKGROUND_PIXEL (f);

  /* Don't let pointers be invisible.  */
  if (mask_color == f->output_data.w32->mouse_pixel
        && mask_color == FRAME_BACKGROUND_PIXEL (f))
    f->output_data.w32->mouse_pixel = FRAME_FOREGROUND_PIXEL (f);

#if 0 /* TODO : Mouse cursor customization.  */
  block_input ();

  /* It's not okay to crash if the user selects a screwy cursor.  */
  count = x_catch_errors (FRAME_W32_DISPLAY (f));

  if (!EQ (Qnil, Vx_pointer_shape))
    {
      CHECK_NUMBER (Vx_pointer_shape);
      cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XINT (Vx_pointer_shape));
    }
  else
    cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XC_xterm);
  x_check_errors (FRAME_W32_DISPLAY (f), "bad text pointer cursor: %s");

  if (!EQ (Qnil, Vx_nontext_pointer_shape))
    {
      CHECK_NUMBER (Vx_nontext_pointer_shape);
      nontext_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f),
                                          XINT (Vx_nontext_pointer_shape));
    }
  else
    nontext_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XC_left_ptr);
  x_check_errors (FRAME_W32_DISPLAY (f), "bad nontext pointer cursor: %s");

  if (!EQ (Qnil, Vx_hourglass_pointer_shape))
    {
      CHECK_NUMBER (Vx_hourglass_pointer_shape);
      hourglass_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f),
                                            XINT (Vx_hourglass_pointer_shape));
    }
  else
    hourglass_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XC_watch);
  x_check_errors (FRAME_W32_DISPLAY (f), "bad busy pointer cursor: %s");

  x_check_errors (FRAME_W32_DISPLAY (f), "bad nontext pointer cursor: %s");
  if (!EQ (Qnil, Vx_mode_pointer_shape))
    {
      CHECK_NUMBER (Vx_mode_pointer_shape);
      mode_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f),
                                       XINT (Vx_mode_pointer_shape));
    }
  else
    mode_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XC_xterm);
  x_check_errors (FRAME_W32_DISPLAY (f), "bad modeline pointer cursor: %s");

  if (!EQ (Qnil, Vx_sensitive_text_pointer_shape))
    {
      CHECK_NUMBER (Vx_sensitive_text_pointer_shape);
      hand_cursor
        = XCreateFontCursor (FRAME_W32_DISPLAY (f),
                             XINT (Vx_sensitive_text_pointer_shape));
    }
  else
    hand_cursor = XCreateFontCursor (FRAME_W32_DISPLAY (f), XC_crosshair);

  if (!NILP (Vx_window_horizontal_drag_shape))
    {
      CHECK_NUMBER (Vx_window_horizontal_drag_shape);
      horizontal_drag_cursor
        = XCreateFontCursor (FRAME_X_DISPLAY (f),
                             XINT (Vx_window_horizontal_drag_shape));
    }
  else
    horizontal_drag_cursor
      = XCreateFontCursor (FRAME_X_DISPLAY (f), XC_sb_h_double_arrow);

  /* Check and report errors with the above calls.  */
  x_check_errors (FRAME_W32_DISPLAY (f), "can't set cursor shape: %s");
  x_uncatch_errors (FRAME_W32_DISPLAY (f), count);

  {
    XColor fore_color, back_color;

    fore_color.pixel = f->output_data.w32->mouse_pixel;
    back_color.pixel = mask_color;
    XQueryColor (FRAME_W32_DISPLAY (f),
                 DefaultColormap (FRAME_W32_DISPLAY (f),
                                  DefaultScreen (FRAME_W32_DISPLAY (f))),
                 &fore_color);
    XQueryColor (FRAME_W32_DISPLAY (f),
                 DefaultColormap (FRAME_W32_DISPLAY (f),
                                  DefaultScreen (FRAME_W32_DISPLAY (f))),
                 &back_color);
    XRecolorCursor (FRAME_W32_DISPLAY (f), cursor,
                    &fore_color, &back_color);
    XRecolorCursor (FRAME_W32_DISPLAY (f), nontext_cursor,
                    &fore_color, &back_color);
    XRecolorCursor (FRAME_W32_DISPLAY (f), mode_cursor,
                    &fore_color, &back_color);
    XRecolorCursor (FRAME_W32_DISPLAY (f), hand_cursor,
                    &fore_color, &back_color);
    XRecolorCursor (FRAME_W32_DISPLAY (f), hourglass_cursor,
                    &fore_color, &back_color);
  }

  if (FRAME_W32_WINDOW (f) != 0)
    XDefineCursor (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f), cursor);

  if (cursor != f->output_data.w32->text_cursor && f->output_data.w32->text_cursor != 0)
    XFreeCursor (FRAME_W32_DISPLAY (f), f->output_data.w32->text_cursor);
  f->output_data.w32->text_cursor = cursor;

  if (nontext_cursor != f->output_data.w32->nontext_cursor
      && f->output_data.w32->nontext_cursor != 0)
    XFreeCursor (FRAME_W32_DISPLAY (f), f->output_data.w32->nontext_cursor);
  f->output_data.w32->nontext_cursor = nontext_cursor;

  if (hourglass_cursor != f->output_data.w32->hourglass_cursor
      && f->output_data.w32->hourglass_cursor != 0)
    XFreeCursor (FRAME_W32_DISPLAY (f), f->output_data.w32->hourglass_cursor);
  f->output_data.w32->hourglass_cursor = hourglass_cursor;

  if (mode_cursor != f->output_data.w32->modeline_cursor
      && f->output_data.w32->modeline_cursor != 0)
    XFreeCursor (FRAME_W32_DISPLAY (f), f->output_data.w32->modeline_cursor);
  f->output_data.w32->modeline_cursor = mode_cursor;

  if (hand_cursor != f->output_data.w32->hand_cursor
      && f->output_data.w32->hand_cursor != 0)
    XFreeCursor (FRAME_W32_DISPLAY (f), f->output_data.w32->hand_cursor);
  f->output_data.w32->hand_cursor = hand_cursor;

  XFlush (FRAME_W32_DISPLAY (f));
  unblock_input ();

  update_face_from_frame_parameter (f, Qmouse_color, arg);
#endif /* TODO */
}

void
x_set_cursor_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  unsigned long fore_pixel, pixel;

  if (!NILP (Vx_cursor_fore_pixel))
    fore_pixel = x_decode_color (f, Vx_cursor_fore_pixel,
                                 WHITE_PIX_DEFAULT (f));
  else
    fore_pixel = FRAME_BACKGROUND_PIXEL (f);

  pixel = x_decode_color (f, arg, BLACK_PIX_DEFAULT (f));

  /* Make sure that the cursor color differs from the background color.  */
  if (pixel == FRAME_BACKGROUND_PIXEL (f))
    {
      pixel = f->output_data.w32->mouse_pixel;
      if (pixel == fore_pixel)
        fore_pixel = FRAME_BACKGROUND_PIXEL (f);
    }

  f->output_data.w32->cursor_foreground_pixel = fore_pixel;
  f->output_data.w32->cursor_pixel = pixel;

  if (FRAME_W32_WINDOW (f) != 0)
    {
      block_input ();
      /* Update frame's cursor_gc.  */
      f->output_data.w32->cursor_gc->foreground = fore_pixel;
      f->output_data.w32->cursor_gc->background = pixel;

      unblock_input ();

      if (FRAME_VISIBLE_P (f))
        {
          x_update_cursor (f, 0);
          x_update_cursor (f, 1);
        }
    }

  update_face_from_frame_parameter (f, Qcursor_color, arg);
}

/* Set the border-color of frame F to pixel value PIX.
   Note that this does not fully take effect if done before
   F has a window.  */

void
x_set_border_pixel (struct frame *f, int pix)
{

  f->output_data.w32->border_pixel = pix;

  if (FRAME_W32_WINDOW (f) != 0 && f->border_width > 0)
    {
      if (FRAME_VISIBLE_P (f))
        redraw_frame (f);
    }
}

/* Set the border-color of frame F to value described by ARG.
   ARG can be a string naming a color.
   The border-color is used for the border that is drawn by the server.
   Note that this does not fully take effect if done before
   F has a window; it must be redone when the window is created.  */

void
x_set_border_color (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  int pix;

  CHECK_STRING (arg);
  pix = x_decode_color (f, arg, BLACK_PIX_DEFAULT (f));
  x_set_border_pixel (f, pix);
  update_face_from_frame_parameter (f, Qborder_color, arg);
}


void
x_set_cursor_type (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  set_frame_cursor_types (f, arg);
}

void
x_set_icon_type (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  int result;

  if (NILP (arg) && NILP (oldval))
    return;

  if (STRINGP (arg) && STRINGP (oldval)
      && EQ (Fstring_equal (oldval, arg), Qt))
    return;

  if (SYMBOLP (arg) && SYMBOLP (oldval) && EQ (arg, oldval))
    return;

  block_input ();

  result = x_bitmap_icon (f, arg);
  if (result)
    {
      unblock_input ();
      error ("No icon window available");
    }

  unblock_input ();
}

void
x_set_icon_name (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  if (STRINGP (arg))
    {
      if (STRINGP (oldval) && EQ (Fstring_equal (oldval, arg), Qt))
        return;
    }
  else if (!NILP (arg) || NILP (oldval))
    return;

  fset_icon_name (f, arg);

#if 0
  if (f->output_data.w32->icon_bitmap != 0)
    return;

  block_input ();

  result = x_text_icon (f,
                        SSDATA ((!NILP (f->icon_name)
                                 ? f->icon_name
                                 : !NILP (f->title)
                                 ? f->title
                                 : f->name)));

  if (result)
    {
      unblock_input ();
      error ("No icon window available");
    }

  /* If the window was unmapped (and its icon was mapped),
     the new icon is not mapped, so map the window in its stead.  */
  if (FRAME_VISIBLE_P (f))
    {
#ifdef USE_X_TOOLKIT
      XtPopup (f->output_data.w32->widget, XtGrabNone);
#endif
      XMapWindow (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f));
    }

  XFlush (FRAME_W32_DISPLAY (f));
  unblock_input ();
#endif
}

\f
void
x_set_menu_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
{
  int nlines;

  /* Right now, menu bars don't work properly in minibuf-only frames;
     most of the commands try to apply themselves to the minibuffer
     frame itself, and get an error because you can't switch buffers
     in or split the minibuffer window.  */
  if (FRAME_MINIBUF_ONLY_P (f))
    return;

  if (INTEGERP (value))
    nlines = XINT (value);
  else
    nlines = 0;

  FRAME_MENU_BAR_LINES (f) = 0;
  if (nlines)
    FRAME_EXTERNAL_MENU_BAR (f) = 1;
  else
    {
      if (FRAME_EXTERNAL_MENU_BAR (f) == 1)
        free_frame_menubar (f);
      FRAME_EXTERNAL_MENU_BAR (f) = 0;

      /* Adjust the frame size so that the client (text) dimensions
         remain the same.  This depends on FRAME_EXTERNAL_MENU_BAR being
         set correctly.  */
      x_set_window_size (f, 0, FRAME_COLS (f), FRAME_LINES (f));
      do_pending_window_change (0);
    }
  adjust_frame_glyphs (f);
}


/* Set the number of lines used for the tool bar of frame F to VALUE.
   VALUE not an integer, or < 0 means set the lines to zero.  OLDVAL
   is the old number of tool bar lines.  This function changes the
   height of all windows on frame F to match the new tool bar height.
   The frame's height doesn't change.  */

void
x_set_tool_bar_lines (struct frame *f, Lisp_Object value, Lisp_Object oldval)
{
  int delta, nlines, root_height;
  Lisp_Object root_window;

  /* Treat tool bars like menu bars.  */
  if (FRAME_MINIBUF_ONLY_P (f))
    return;

  /* Use VALUE only if an integer >= 0.  */
  if (INTEGERP (value) && XINT (value) >= 0)
    nlines = XFASTINT (value);
  else
    nlines = 0;

  /* Make sure we redisplay all windows in this frame.  */
  ++windows_or_buffers_changed;

  delta = nlines - FRAME_TOOL_BAR_LINES (f);

  /* Don't resize the tool-bar to more than we have room for.  */
  root_window = FRAME_ROOT_WINDOW (f);
  root_height = WINDOW_TOTAL_LINES (XWINDOW (root_window));
  if (root_height - delta < 1)
    {
      delta = root_height - 1;
      nlines = FRAME_TOOL_BAR_LINES (f) + delta;
    }

  FRAME_TOOL_BAR_LINES (f) = nlines;
  resize_frame_windows (f, FRAME_LINES (f), 0);
  adjust_frame_glyphs (f);

  /* We also have to make sure that the internal border at the top of
     the frame, below the menu bar or tool bar, is redrawn when the
     tool bar disappears.  This is so because the internal border is
     below the tool bar if one is displayed, but is below the menu bar
     if there isn't a tool bar.  The tool bar draws into the area
     below the menu bar.  */
  if (FRAME_W32_WINDOW (f) && FRAME_TOOL_BAR_LINES (f) == 0)
    {
      clear_frame (f);
      clear_current_matrices (f);
    }

  /* If the tool bar gets smaller, the internal border below it
     has to be cleared.  It was formerly part of the display
     of the larger tool bar, and updating windows won't clear it.  */
  if (delta < 0)
    {
      int height = FRAME_INTERNAL_BORDER_WIDTH (f);
      int width = FRAME_PIXEL_WIDTH (f);
      int y = nlines * FRAME_LINE_HEIGHT (f);

      block_input ();
      {
        HDC hdc = get_frame_dc (f);
        w32_clear_area (f, hdc, 0, y, width, height);
        release_frame_dc (f, hdc);
      }
      unblock_input ();

      if (WINDOWP (f->tool_bar_window))
        clear_glyph_matrix (XWINDOW (f->tool_bar_window)->current_matrix);
    }

  run_window_configuration_change_hook (f);

}


/* Change the name of frame F to NAME.  If NAME is nil, set F's name to
       w32_id_name.

   If EXPLICIT is non-zero, that indicates that lisp code is setting the
       name; if NAME is a string, set F's name to NAME and set
       F->explicit_name; if NAME is Qnil, then clear F->explicit_name.

   If EXPLICIT is zero, that indicates that Emacs redisplay code is
       suggesting a new name, which lisp code should override; if
       F->explicit_name is set, ignore the new name; otherwise, set it.  */

void
x_set_name (struct frame *f, Lisp_Object name, int explicit)
{
  /* Make sure that requests from lisp code override requests from
     Emacs redisplay code.  */
  if (explicit)
    {
      /* If we're switching from explicit to implicit, we had better
         update the mode lines and thereby update the title.  */
      if (f->explicit_name && NILP (name))
        update_mode_lines = 1;

      f->explicit_name = ! NILP (name);
    }
  else if (f->explicit_name)
    return;

  /* If NAME is nil, set the name to the w32_id_name.  */
  if (NILP (name))
    {
      /* Check for no change needed in this very common case
         before we do any consing.  */
      if (!strcmp (FRAME_DISPLAY_INFO (f)->w32_id_name,
                   SDATA (f->name)))
        return;
      name = build_string (FRAME_DISPLAY_INFO (f)->w32_id_name);
    }
  else
    CHECK_STRING (name);

  /* Don't change the name if it's already NAME.  */
  if (! NILP (Fstring_equal (name, f->name)))
    return;

  fset_name (f, name);

  /* For setting the frame title, the title parameter should override
     the name parameter.  */
  if (! NILP (f->title))
    name = f->title;

  if (FRAME_W32_WINDOW (f))
    {
      block_input ();
      GUI_FN (SetWindowText) (FRAME_W32_WINDOW (f),
                              GUI_SDATA (GUI_ENCODE_SYSTEM (name)));
      unblock_input ();
    }
}

/* This function should be called when the user's lisp code has
   specified a name for the frame; the name will override any set by the
   redisplay code.  */
void
x_explicitly_set_name (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  x_set_name (f, arg, 1);
}

/* This function should be called by Emacs redisplay code to set the
   name; names set this way will never override names set by the user's
   lisp code.  */
void
x_implicitly_set_name (struct frame *f, Lisp_Object arg, Lisp_Object oldval)
{
  x_set_name (f, arg, 0);
}
\f
/* Change the title of frame F to NAME.
   If NAME is nil, use the frame name as the title.  */

void
x_set_title (struct frame *f, Lisp_Object name, Lisp_Object old_name)
{
  /* Don't change the title if it's already NAME.  */
  if (EQ (name, f->title))
    return;

  update_mode_lines = 1;

  fset_title (f, name);

  if (NILP (name))
    name = f->name;

  if (FRAME_W32_WINDOW (f))
    {
      block_input ();
      GUI_FN (SetWindowText) (FRAME_W32_WINDOW (f),
                              GUI_SDATA (GUI_ENCODE_SYSTEM (name)));
      unblock_input ();
    }
}

void
x_set_scroll_bar_default_width (struct frame *f)
{
  int wid = FRAME_COLUMN_WIDTH (f);

  FRAME_CONFIG_SCROLL_BAR_WIDTH (f) = GetSystemMetrics (SM_CXVSCROLL);
  FRAME_CONFIG_SCROLL_BAR_COLS (f) = (FRAME_CONFIG_SCROLL_BAR_WIDTH (f) +
                                      wid - 1) / wid;
}

\f
/* Subroutines for creating a frame.  */

Cursor
w32_load_cursor (LPCTSTR name)
{
  /* Try first to load cursor from application resource.  */
  Cursor cursor = LoadImage ((HINSTANCE) GetModuleHandle (NULL),
                             name, IMAGE_CURSOR, 0, 0,
                             LR_DEFAULTCOLOR | LR_DEFAULTSIZE | LR_SHARED);
  if (!cursor)
    {
      /* Then try to load a shared predefined cursor.  */
      cursor = LoadImage (NULL, name, IMAGE_CURSOR, 0, 0,
                          LR_DEFAULTCOLOR | LR_DEFAULTSIZE | LR_SHARED);
    }
  return cursor;
}

static LRESULT CALLBACK w32_wnd_proc (HWND, UINT, WPARAM, LPARAM);

#define INIT_WINDOW_CLASS(WC)                     \
  (WC).style = CS_HREDRAW | CS_VREDRAW;           \
  (WC).lpfnWndProc = (WNDPROC) w32_wnd_proc;      \
  (WC).cbClsExtra = 0;                            \
  (WC).cbWndExtra = WND_EXTRA_BYTES;              \
  (WC).hInstance = hinst;                         \
  (WC).hIcon = LoadIcon (hinst, EMACS_CLASS);     \
  (WC).hCursor = w32_load_cursor (IDC_ARROW);     \
  (WC).hbrBackground = NULL;                      \
  (WC).lpszMenuName = NULL;                       \

static BOOL
w32_init_class (HINSTANCE hinst)
{
  if (w32_unicode_gui)
    {
      WNDCLASSW  uwc;
      INIT_WINDOW_CLASS(uwc);
      uwc.lpszClassName = L"Emacs";

      return RegisterClassW (&uwc);
    }
  else
    {
      WNDCLASS  wc;
      INIT_WINDOW_CLASS(wc);
      wc.lpszClassName = EMACS_CLASS;

      return RegisterClassA (&wc);
    }
}

static HWND
w32_createscrollbar (struct frame *f, struct scroll_bar * bar)
{
  return (CreateWindow ("SCROLLBAR", "", SBS_VERT | WS_CHILD | WS_VISIBLE,
                        /* Position and size of scroll bar.  */
                        XINT (bar->left) + VERTICAL_SCROLL_BAR_WIDTH_TRIM,
                        XINT (bar->top),
                        XINT (bar->width) - VERTICAL_SCROLL_BAR_WIDTH_TRIM * 2,
                        XINT (bar->height),
                        FRAME_W32_WINDOW (f),
                        NULL,
                        hinst,
                        NULL));
}

static void
w32_createwindow (struct frame *f)
{
  HWND hwnd;
  RECT rect;
  Lisp_Object top = Qunbound;
  Lisp_Object left = Qunbound;
  struct w32_display_info *dpyinfo = &one_w32_display_info;

  rect.left = rect.top = 0;
  rect.right = FRAME_PIXEL_WIDTH (f);
  rect.bottom = FRAME_PIXEL_HEIGHT (f);

  AdjustWindowRect (&rect, f->output_data.w32->dwStyle,
                    FRAME_EXTERNAL_MENU_BAR (f));

  /* Do first time app init */

  w32_init_class (hinst);

  if (f->size_hint_flags & USPosition || f->size_hint_flags & PPosition)
    {
      XSETINT (left, f->left_pos);
      XSETINT (top, f->top_pos);
    }
  else if (EQ (left, Qunbound) && EQ (top, Qunbound))
    {
      /* When called with RES_TYPE_NUMBER, w32_get_arg will return zero
         for anything that is not a number and is not Qunbound.  */
      left = x_get_arg (dpyinfo, Qnil, Qleft, "left", "Left", RES_TYPE_NUMBER);
      top = x_get_arg (dpyinfo, Qnil, Qtop, "top", "Top", RES_TYPE_NUMBER);
    }

  FRAME_W32_WINDOW (f) = hwnd
    = CreateWindow (EMACS_CLASS,
                    f->namebuf,
                    f->output_data.w32->dwStyle | WS_CLIPCHILDREN,
                    EQ (left, Qunbound) ? CW_USEDEFAULT : XINT (left),
                    EQ (top, Qunbound) ? CW_USEDEFAULT : XINT (top),
                    rect.right - rect.left,
                    rect.bottom - rect.top,
                    NULL,
                    NULL,
                    hinst,
                    NULL);

  if (hwnd)
    {
      SetWindowLong (hwnd, WND_FONTWIDTH_INDEX, FRAME_COLUMN_WIDTH (f));
      SetWindowLong (hwnd, WND_LINEHEIGHT_INDEX, FRAME_LINE_HEIGHT (f));
      SetWindowLong (hwnd, WND_BORDER_INDEX, FRAME_INTERNAL_BORDER_WIDTH (f));
      SetWindowLong (hwnd, WND_SCROLLBAR_INDEX, f->scroll_bar_actual_width);
      SetWindowLong (hwnd, WND_BACKGROUND_INDEX, FRAME_BACKGROUND_PIXEL (f));

      /* Enable drag-n-drop.  */
      DragAcceptFiles (hwnd, TRUE);

      /* Do this to discard the default setting specified by our parent. */
      ShowWindow (hwnd, SW_HIDE);

      /* Update frame positions. */
      GetWindowRect (hwnd, &rect);
      f->left_pos = rect.left;
      f->top_pos = rect.top;
    }
}

static void
my_post_msg (W32Msg * wmsg, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  wmsg->msg.hwnd = hwnd;
  wmsg->msg.message = msg;
  wmsg->msg.wParam = wParam;
  wmsg->msg.lParam = lParam;
  wmsg->msg.time = GetMessageTime ();

  post_msg (wmsg);
}

/* GetKeyState and MapVirtualKey on Windows 95 do not actually distinguish
   between left and right keys as advertised.  We test for this
   support dynamically, and set a flag when the support is absent.  If
   absent, we keep track of the left and right control and alt keys
   ourselves.  This is particularly necessary on keyboards that rely
   upon the AltGr key, which is represented as having the left control
   and right alt keys pressed.  For these keyboards, we need to know
   when the left alt key has been pressed in addition to the AltGr key
   so that we can properly support M-AltGr-key sequences (such as M-@
   on Swedish keyboards).  */

#define EMACS_LCONTROL 0
#define EMACS_RCONTROL 1
#define EMACS_LMENU    2
#define EMACS_RMENU    3

static int modifiers[4];
static int modifiers_recorded;
static int modifier_key_support_tested;

static void
test_modifier_support (unsigned int wparam)
{
  unsigned int l, r;

  if (wparam != VK_CONTROL && wparam != VK_MENU)
    return;
  if (wparam == VK_CONTROL)
    {
      l = VK_LCONTROL;
      r = VK_RCONTROL;
    }
  else
    {
      l = VK_LMENU;
      r = VK_RMENU;
    }
  if (!(GetKeyState (l) & 0x8000) && !(GetKeyState (r) & 0x8000))
    modifiers_recorded = 1;
  else
    modifiers_recorded = 0;
  modifier_key_support_tested = 1;
}

static void
record_keydown (unsigned int wparam, unsigned int lparam)
{
  int i;

  if (!modifier_key_support_tested)
    test_modifier_support (wparam);

  if ((wparam != VK_CONTROL && wparam != VK_MENU) || !modifiers_recorded)
    return;

  if (wparam == VK_CONTROL)
    i = (lparam & 0x1000000) ? EMACS_RCONTROL : EMACS_LCONTROL;
  else
    i = (lparam & 0x1000000) ? EMACS_RMENU : EMACS_LMENU;

  modifiers[i] = 1;
}

static void
record_keyup (unsigned int wparam, unsigned int lparam)
{
  int i;

  if ((wparam != VK_CONTROL && wparam != VK_MENU) || !modifiers_recorded)
    return;

  if (wparam == VK_CONTROL)
    i = (lparam & 0x1000000) ? EMACS_RCONTROL : EMACS_LCONTROL;
  else
    i = (lparam & 0x1000000) ? EMACS_RMENU : EMACS_LMENU;

  modifiers[i] = 0;
}

/* Emacs can lose focus while a modifier key has been pressed.  When
   it regains focus, be conservative and clear all modifiers since
   we cannot reconstruct the left and right modifier state.  */
static void
reset_modifiers (void)
{
  SHORT ctrl, alt;

  if (GetFocus () == NULL)
    /* Emacs doesn't have keyboard focus.  Do nothing.  */
    return;

  ctrl = GetAsyncKeyState (VK_CONTROL);
  alt = GetAsyncKeyState (VK_MENU);

  if (!(ctrl & 0x08000))
    /* Clear any recorded control modifier state.  */
    modifiers[EMACS_RCONTROL] = modifiers[EMACS_LCONTROL] = 0;

  if (!(alt & 0x08000))
    /* Clear any recorded alt modifier state.  */
    modifiers[EMACS_RMENU] = modifiers[EMACS_LMENU] = 0;

  /* Update the state of all modifier keys, because modifiers used in
     hot-key combinations can get stuck on if Emacs loses focus as a
     result of a hot-key being pressed.  */
  {
    BYTE keystate[256];

#define CURRENT_STATE(key) ((GetAsyncKeyState (key) & 0x8000) >> 8)

    GetKeyboardState (keystate);
    keystate[VK_SHIFT] = CURRENT_STATE (VK_SHIFT);
    keystate[VK_CONTROL] = CURRENT_STATE (VK_CONTROL);
    keystate[VK_LCONTROL] = CURRENT_STATE (VK_LCONTROL);
    keystate[VK_RCONTROL] = CURRENT_STATE (VK_RCONTROL);
    keystate[VK_MENU] = CURRENT_STATE (VK_MENU);
    keystate[VK_LMENU] = CURRENT_STATE (VK_LMENU);
    keystate[VK_RMENU] = CURRENT_STATE (VK_RMENU);
    keystate[VK_LWIN] = CURRENT_STATE (VK_LWIN);
    keystate[VK_RWIN] = CURRENT_STATE (VK_RWIN);
    keystate[VK_APPS] = CURRENT_STATE (VK_APPS);
    SetKeyboardState (keystate);
  }
}

/* Synchronize modifier state with what is reported with the current
   keystroke.  Even if we cannot distinguish between left and right
   modifier keys, we know that, if no modifiers are set, then neither
   the left or right modifier should be set.  */
static void
sync_modifiers (void)
{
  if (!modifiers_recorded)
    return;

  if (!(GetKeyState (VK_CONTROL) & 0x8000))
    modifiers[EMACS_RCONTROL] = modifiers[EMACS_LCONTROL] = 0;

  if (!(GetKeyState (VK_MENU) & 0x8000))
    modifiers[EMACS_RMENU] = modifiers[EMACS_LMENU] = 0;
}

static int
modifier_set (int vkey)
{
  /* Warning: The fact that VK_NUMLOCK is not treated as the other 2
     toggle keys is not an omission!  If you want to add it, you will
     have to make changes in the default sub-case of the WM_KEYDOWN
     switch, because if the NUMLOCK modifier is set, the code there
     will directly convert any key that looks like an ASCII letter,
     and also downcase those that look like upper-case ASCII.  */
  if (vkey == VK_CAPITAL)
    {
      if (NILP (Vw32_enable_caps_lock))
        return 0;
      else
        return (GetKeyState (vkey) & 0x1);
    }
  if (vkey == VK_SCROLL)
    {
      if (NILP (Vw32_scroll_lock_modifier)
          /* w32-scroll-lock-modifier can be any non-nil value that is
             not one of the modifiers, in which case it shall be ignored.  */
          || !(   EQ (Vw32_scroll_lock_modifier, Qhyper)
               || EQ (Vw32_scroll_lock_modifier, Qsuper)
               || EQ (Vw32_scroll_lock_modifier, Qmeta)
               || EQ (Vw32_scroll_lock_modifier, Qalt)
               || EQ (Vw32_scroll_lock_modifier, Qcontrol)
               || EQ (Vw32_scroll_lock_modifier, Qshift)))
        return 0;
      else
        return (GetKeyState (vkey) & 0x1);
    }

  if (!modifiers_recorded)
    return (GetKeyState (vkey) & 0x8000);

  switch (vkey)
    {
    case VK_LCONTROL:
      return modifiers[EMACS_LCONTROL];
    case VK_RCONTROL:
      return modifiers[EMACS_RCONTROL];
    case VK_LMENU:
      return modifiers[EMACS_LMENU];
    case VK_RMENU:
      return modifiers[EMACS_RMENU];
    }
  return (GetKeyState (vkey) & 0x8000);
}

/* Convert between the modifier bits W32 uses and the modifier bits
   Emacs uses.  */

unsigned int
w32_key_to_modifier (int key)
{
  Lisp_Object key_mapping;

  switch (key)
    {
    case VK_LWIN:
      key_mapping = Vw32_lwindow_modifier;
      break;
    case VK_RWIN:
      key_mapping = Vw32_rwindow_modifier;
      break;
    case VK_APPS:
      key_mapping = Vw32_apps_modifier;
      break;
    case VK_SCROLL:
      key_mapping = Vw32_scroll_lock_modifier;
      break;
    default:
      key_mapping = Qnil;
    }

  /* NB. This code runs in the input thread, asynchronously to the lisp
     thread, so we must be careful to ensure access to lisp data is
     thread-safe.  The following code is safe because the modifier
     variable values are updated atomically from lisp and symbols are
     not relocated by GC.  Also, we don't have to worry about seeing GC
     markbits here.  */
  if (EQ (key_mapping, Qhyper))
    return hyper_modifier;
  if (EQ (key_mapping, Qsuper))
    return super_modifier;
  if (EQ (key_mapping, Qmeta))
    return meta_modifier;
  if (EQ (key_mapping, Qalt))
    return alt_modifier;
  if (EQ (key_mapping, Qctrl))
    return ctrl_modifier;
  if (EQ (key_mapping, Qcontrol)) /* synonym for ctrl */
    return ctrl_modifier;
  if (EQ (key_mapping, Qshift))
    return shift_modifier;

  /* Don't generate any modifier if not explicitly requested.  */
  return 0;
}

static unsigned int
w32_get_modifiers (void)
{
  return ((modifier_set (VK_SHIFT)   ? shift_modifier : 0) |
          (modifier_set (VK_CONTROL) ? ctrl_modifier  : 0) |
          (modifier_set (VK_LWIN)    ? w32_key_to_modifier (VK_LWIN) : 0) |
          (modifier_set (VK_RWIN)    ? w32_key_to_modifier (VK_RWIN) : 0) |
          (modifier_set (VK_APPS)    ? w32_key_to_modifier (VK_APPS) : 0) |
          (modifier_set (VK_SCROLL)  ? w32_key_to_modifier (VK_SCROLL) : 0) |
          (modifier_set (VK_MENU)    ?
           ((NILP (Vw32_alt_is_meta)) ? alt_modifier : meta_modifier) : 0));
}

/* We map the VK_* modifiers into console modifier constants
   so that we can use the same routines to handle both console
   and window input.  */

static int
construct_console_modifiers (void)
{
  int mods;

  mods = 0;
  mods |= (modifier_set (VK_SHIFT)) ? SHIFT_PRESSED : 0;
  mods |= (modifier_set (VK_CAPITAL)) ? CAPSLOCK_ON : 0;
  mods |= (modifier_set (VK_SCROLL)) ? SCROLLLOCK_ON : 0;
  mods |= (modifier_set (VK_NUMLOCK)) ? NUMLOCK_ON : 0;
  mods |= (modifier_set (VK_LCONTROL)) ? LEFT_CTRL_PRESSED : 0;
  mods |= (modifier_set (VK_RCONTROL)) ? RIGHT_CTRL_PRESSED : 0;
  mods |= (modifier_set (VK_LMENU)) ? LEFT_ALT_PRESSED : 0;
  mods |= (modifier_set (VK_RMENU)) ? RIGHT_ALT_PRESSED : 0;
  mods |= (modifier_set (VK_LWIN)) ? LEFT_WIN_PRESSED : 0;
  mods |= (modifier_set (VK_RWIN)) ? RIGHT_WIN_PRESSED : 0;
  mods |= (modifier_set (VK_APPS)) ? APPS_PRESSED : 0;

  return mods;
}

static int
w32_get_key_modifiers (unsigned int wparam, unsigned int lparam)
{
  int mods;

  /* Convert to emacs modifiers.  */
  mods = w32_kbd_mods_to_emacs (construct_console_modifiers (), wparam);

  return mods;
}

unsigned int
map_keypad_keys (unsigned int virt_key, unsigned int extended)
{
  if (virt_key < VK_CLEAR || virt_key > VK_DELETE)
    return virt_key;

  if (virt_key == VK_RETURN)
    return (extended ? VK_NUMPAD_ENTER : VK_RETURN);

  if (virt_key >= VK_PRIOR && virt_key <= VK_DOWN)
    return (!extended ? (VK_NUMPAD_PRIOR + (virt_key - VK_PRIOR)) : virt_key);

  if (virt_key == VK_INSERT || virt_key == VK_DELETE)
    return (!extended ? (VK_NUMPAD_INSERT + (virt_key - VK_INSERT)) : virt_key);

  if (virt_key == VK_CLEAR)
    return (!extended ? VK_NUMPAD_CLEAR : virt_key);

  return virt_key;
}

/* List of special key combinations which w32 would normally capture,
   but Emacs should grab instead.  Not directly visible to lisp, to
   simplify synchronization.  Each item is an integer encoding a virtual
   key code and modifier combination to capture.  */
static Lisp_Object w32_grabbed_keys;

#define HOTKEY(vk, mods)      make_number (((vk) & 255) | ((mods) << 8))
#define HOTKEY_ID(k)          (XFASTINT (k) & 0xbfff)
#define HOTKEY_VK_CODE(k)     (XFASTINT (k) & 255)
#define HOTKEY_MODIFIERS(k)   (XFASTINT (k) >> 8)

#define RAW_HOTKEY_ID(k)        ((k) & 0xbfff)
#define RAW_HOTKEY_VK_CODE(k)   ((k) & 255)
#define RAW_HOTKEY_MODIFIERS(k) ((k) >> 8)

/* Register hot-keys for reserved key combinations when Emacs has
   keyboard focus, since this is the only way Emacs can receive key
   combinations like Alt-Tab which are used by the system.  */

static void
register_hot_keys (HWND hwnd)
{
  Lisp_Object keylist;

  /* Use CONSP, since we are called asynchronously.  */
  for (keylist = w32_grabbed_keys; CONSP (keylist); keylist = XCDR (keylist))
    {
      Lisp_Object key = XCAR (keylist);

      /* Deleted entries get set to nil.  */
      if (!INTEGERP (key))
        continue;

      RegisterHotKey (hwnd, HOTKEY_ID (key),
                      HOTKEY_MODIFIERS (key), HOTKEY_VK_CODE (key));
    }
}

static void
unregister_hot_keys (HWND hwnd)
{
  Lisp_Object keylist;

  for (keylist = w32_grabbed_keys; CONSP (keylist); keylist = XCDR (keylist))
    {
      Lisp_Object key = XCAR (keylist);

      if (!INTEGERP (key))
        continue;

      UnregisterHotKey (hwnd, HOTKEY_ID (key));
    }
}

#if EMACSDEBUG
const char*
w32_name_of_message (UINT msg)
{
  unsigned i;
  static char buf[64];
  static const struct {
    UINT msg;
    const char* name;
  } msgnames[] = {
#define M(msg) { msg, # msg }
      M (WM_PAINT),
      M (WM_TIMER),
      M (WM_USER),
      M (WM_MOUSEMOVE),
      M (WM_LBUTTONUP),
      M (WM_KEYDOWN),
      M (WM_EMACS_KILL),
      M (WM_EMACS_CREATEWINDOW),
      M (WM_EMACS_DONE),
      M (WM_EMACS_CREATESCROLLBAR),
      M (WM_EMACS_SHOWWINDOW),
      M (WM_EMACS_SETWINDOWPOS),
      M (WM_EMACS_DESTROYWINDOW),
      M (WM_EMACS_TRACKPOPUPMENU),
      M (WM_EMACS_SETFOCUS),
      M (WM_EMACS_SETFOREGROUND),
      M (WM_EMACS_SETLOCALE),
      M (WM_EMACS_SETKEYBOARDLAYOUT),
      M (WM_EMACS_REGISTER_HOT_KEY),
      M (WM_EMACS_UNREGISTER_HOT_KEY),
      M (WM_EMACS_TOGGLE_LOCK_KEY),
      M (WM_EMACS_TRACK_CARET),
      M (WM_EMACS_DESTROY_CARET),
      M (WM_EMACS_SHOW_CARET),
      M (WM_EMACS_HIDE_CARET),
      M (WM_EMACS_SETCURSOR),
      M (WM_EMACS_PAINT),
      M (WM_CHAR),
#undef M
      { 0, 0 }
  };

  for (i = 0; msgnames[i].name; ++i)
    if (msgnames[i].msg == msg)
      return msgnames[i].name;

  sprintf (buf, "message 0x%04x", (unsigned)msg);
  return buf;
}
#endif /* EMACSDEBUG */

/* Here's an overview of how Emacs input works in GUI sessions on
   MS-Windows.  (For description of non-GUI input, see the commentary
   before w32_console_read_socket in w32inevt.c.)

   System messages are read and processed by w32_msg_pump below.  This
   function runs in a separate thread.  It handles a small number of
   custom WM_EMACS_* messages (posted by the main thread, look for
   PostMessage calls), and dispatches the rest to w32_wnd_proc, which
   is the main window procedure for the entire Emacs application.

   w32_wnd_proc also runs in the same separate input thread.  It
   handles some messages, mostly those that need GDI calls, by itself.
   For the others, it calls my_post_msg, which inserts the messages
   into the input queue serviced by w32_read_socket.

   w32_read_socket runs in the main (a.k.a. "Lisp") thread, and is
   called synchronously from keyboard.c when it is known or suspected
   that some input is available.  w32_read_socket either handles
   messages immediately, or converts them into Emacs input events and
   stuffs them into kbd_buffer, where kbd_buffer_get_event can get at
   them and process them when read_char and its callers require
   input.

   Under Cygwin with the W32 toolkit, the use of /dev/windows with
   select(2) takes the place of w32_read_socket.

   */

/* Main message dispatch loop. */

static void
w32_msg_pump (deferred_msg * msg_buf)
{
  MSG msg;
  WPARAM result;
  HWND focus_window;

  msh_mousewheel = RegisterWindowMessage (MSH_MOUSEWHEEL);

  while ((w32_unicode_gui ? GetMessageW : GetMessageA) (&msg, NULL, 0, 0))
    {

      /* DebPrint (("w32_msg_pump: %s time:%u\n", */
      /*            w32_name_of_message (msg.message), msg.time)); */

      if (msg.hwnd == NULL)
        {
          switch (msg.message)
            {
            case WM_NULL:
              /* Produced by complete_deferred_msg; just ignore.  */
              break;
            case WM_EMACS_CREATEWINDOW:
              /* Initialize COM for this window. Even though we don't use it,
                 some third party shell extensions can cause it to be used in
                 system dialogs, which causes a crash if it is not initialized.
                 This is a known bug in Windows, which was fixed long ago, but
                 the patch for XP is not publicly available until XP SP3,
                 and older versions will never be patched.  */
              CoInitialize (NULL);
              w32_createwindow ((struct frame *) msg.wParam);
              if (!PostThreadMessage (dwMainThreadId, WM_EMACS_DONE, 0, 0))
                emacs_abort ();
              break;
            case WM_EMACS_SETLOCALE:
              SetThreadLocale (msg.wParam);
              /* Reply is not expected.  */
              break;
            case WM_EMACS_SETKEYBOARDLAYOUT:
              result = (WPARAM) ActivateKeyboardLayout ((HKL) msg.wParam, 0);
              if (!PostThreadMessage (dwMainThreadId, WM_EMACS_DONE,
                                      result, 0))
                emacs_abort ();
              break;
            case WM_EMACS_REGISTER_HOT_KEY:
              focus_window = GetFocus ();
              if (focus_window != NULL)
                RegisterHotKey (focus_window,
                                RAW_HOTKEY_ID (msg.wParam),
                                RAW_HOTKEY_MODIFIERS (msg.wParam),
                                RAW_HOTKEY_VK_CODE (msg.wParam));
              /* Reply is not expected.  */
              break;
            case WM_EMACS_UNREGISTER_HOT_KEY:
              focus_window = GetFocus ();
              if (focus_window != NULL)
                UnregisterHotKey (focus_window, RAW_HOTKEY_ID (msg.wParam));
              /* Mark item as erased.  NB: this code must be
                 thread-safe.  The next line is okay because the cons
                 cell is never made into garbage and is not relocated by
                 GC.  */
              XSETCAR (XIL ((EMACS_INT) msg.lParam), Qnil);
              if (!PostThreadMessage (dwMainThreadId, WM_EMACS_DONE, 0, 0))
                emacs_abort ();
              break;
            case WM_EMACS_TOGGLE_LOCK_KEY:
              {
                int vk_code = (int) msg.wParam;
                int cur_state = (GetKeyState (vk_code) & 1);
                Lisp_Object new_state = XIL ((EMACS_INT) msg.lParam);

                /* NB: This code must be thread-safe.  It is safe to
                   call NILP because symbols are not relocated by GC,
                   and pointer here is not touched by GC (so the markbit
                   can't be set).  Numbers are safe because they are
                   immediate values.  */
                if (NILP (new_state)
                    || (NUMBERP (new_state)
                        && ((XUINT (new_state)) & 1) != cur_state))
                  {
                    one_w32_display_info.faked_key = vk_code;

                    keybd_event ((BYTE) vk_code,
                                 (BYTE) MapVirtualKey (vk_code, 0),
                                 KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
                    keybd_event ((BYTE) vk_code,
                                 (BYTE) MapVirtualKey (vk_code, 0),
                                 KEYEVENTF_EXTENDEDKEY | 0, 0);
                    keybd_event ((BYTE) vk_code,
                                 (BYTE) MapVirtualKey (vk_code, 0),
                                 KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
                    cur_state = !cur_state;
                  }
                if (!PostThreadMessage (dwMainThreadId, WM_EMACS_DONE,
                                        cur_state, 0))
                  emacs_abort ();
              }
              break;
#ifdef MSG_DEBUG
              /* Broadcast messages make it here, so you need to be looking
                 for something in particular for this to be useful.  */
            default:
              DebPrint (("msg %x not expected by w32_msg_pump\n", msg.message));
#endif
            }
        }
      else
        {
          if (w32_unicode_gui)
            DispatchMessageW (&msg);
          else
            DispatchMessageA (&msg);
        }

      /* Exit nested loop when our deferred message has completed.  */
      if (msg_buf->completed)
        break;
    }
}

deferred_msg * deferred_msg_head;

static deferred_msg *
find_deferred_msg (HWND hwnd, UINT msg)
{
  deferred_msg * item;

  /* Don't actually need synchronization for read access, since
     modification of single pointer is always atomic.  */
  /* enter_crit (); */

  for (item = deferred_msg_head; item != NULL; item = item->next)
    if (item->w32msg.msg.hwnd == hwnd
        && item->w32msg.msg.message == msg)
      break;

  /* leave_crit (); */

  return item;
}

static LRESULT
send_deferred_msg (deferred_msg * msg_buf,
                   HWND hwnd,
                   UINT msg,
                   WPARAM wParam,
                   LPARAM lParam)
{
  /* Only input thread can send deferred messages.  */
  if (GetCurrentThreadId () != dwWindowsThreadId)
    emacs_abort ();

  /* It is an error to send a message that is already deferred.  */
  if (find_deferred_msg (hwnd, msg) != NULL)
    emacs_abort ();

  /* Enforced synchronization is not needed because this is the only
     function that alters deferred_msg_head, and the following critical
     section is guaranteed to only be serially reentered (since only the
     input thread can call us).  */

  /* enter_crit (); */

  msg_buf->completed = 0;
  msg_buf->next = deferred_msg_head;
  deferred_msg_head = msg_buf;
  my_post_msg (&msg_buf->w32msg, hwnd, msg, wParam, lParam);

  /* leave_crit (); */

  /* Start a new nested message loop to process other messages until
     this one is completed.  */
  w32_msg_pump (msg_buf);

  deferred_msg_head = msg_buf->next;

  return msg_buf->result;
}

void
complete_deferred_msg (HWND hwnd, UINT msg, LRESULT result)
{
  deferred_msg * msg_buf = find_deferred_msg (hwnd, msg);

  if (msg_buf == NULL)
    /* Message may have been canceled, so don't abort.  */
    return;

  msg_buf->result = result;
  msg_buf->completed = 1;

  /* Ensure input thread is woken so it notices the completion.  */
  PostThreadMessage (dwWindowsThreadId, WM_NULL, 0, 0);
}

static void
cancel_all_deferred_msgs (void)
{
  deferred_msg * item;

  /* Don't actually need synchronization for read access, since
     modification of single pointer is always atomic.  */
  /* enter_crit (); */

  for (item = deferred_msg_head; item != NULL; item = item->next)
    {
      item->result = 0;
      item->completed = 1;
    }

  /* leave_crit (); */

  /* Ensure input thread is woken so it notices the completion.  */
  PostThreadMessage (dwWindowsThreadId, WM_NULL, 0, 0);
}

DWORD WINAPI
w32_msg_worker (void *arg)
{
  MSG msg;
  deferred_msg dummy_buf;

  /* Ensure our message queue is created */

  PeekMessage (&msg, NULL, 0, 0, PM_NOREMOVE);

  if (!PostThreadMessage (dwMainThreadId, WM_EMACS_DONE, 0, 0))
    emacs_abort ();

  memset (&dummy_buf, 0, sizeof (dummy_buf));
  dummy_buf.w32msg.msg.hwnd = NULL;
  dummy_buf.w32msg.msg.message = WM_NULL;

  /* This is the initial message loop which should only exit when the
     application quits.  */
  w32_msg_pump (&dummy_buf);

  return 0;
}

static void
signal_user_input (void)
{
  /* Interrupt any lisp that wants to be interrupted by input.  */
  if (!NILP (Vthrow_on_input))
    {
      Vquit_flag = Vthrow_on_input;
      /* Doing a QUIT from this thread is a bad idea, since this
         unwinds the stack of the Lisp thread, and the Windows runtime
         rightfully barfs.  Disabled.  */
#if 0
      /* If we're inside a function that wants immediate quits,
         do it now.  */
      if (immediate_quit && NILP (Vinhibit_quit))
        {
          immediate_quit = 0;
          QUIT;
        }
#endif
    }
}


static void
post_character_message (HWND hwnd, UINT msg,
                        WPARAM wParam, LPARAM lParam,
                        DWORD modifiers)
{
  W32Msg wmsg;

  wmsg.dwModifiers = modifiers;

  /* Detect quit_char and set quit-flag directly.  Note that we
     still need to post a message to ensure the main thread will be
     woken up if blocked in sys_select, but we do NOT want to post
     the quit_char message itself (because it will usually be as if
     the user had typed quit_char twice).  Instead, we post a dummy
     message that has no particular effect.  */
  {
    int c = wParam;
    if (isalpha (c) && wmsg.dwModifiers == ctrl_modifier)
      c = make_ctrl_char (c) & 0377;
    if (c == quit_char
        || (wmsg.dwModifiers == 0
            && w32_quit_key && wParam == w32_quit_key))
      {
        Vquit_flag = Qt;

        /* The choice of message is somewhat arbitrary, as long as
           the main thread handler just ignores it.  */
        msg = WM_NULL;

        /* Interrupt any blocking system calls.  */
        signal_quit ();

        /* As a safety precaution, forcibly complete any deferred
           messages.  This is a kludge, but I don't see any particularly
           clean way to handle the situation where a deferred message is
           "dropped" in the lisp thread, and will thus never be
           completed, eg. by the user trying to activate the menubar
           when the lisp thread is busy, and then typing C-g when the
           menubar doesn't open promptly (with the result that the
           menubar never responds at all because the deferred
           WM_INITMENU message is never completed).  Another problem
           situation is when the lisp thread calls SendMessage (to send
           a window manager command) when a message has been deferred;
           the lisp thread gets blocked indefinitely waiting for the
           deferred message to be completed, which itself is waiting for
           the lisp thread to respond.

           Note that we don't want to block the input thread waiting for
           a response from the lisp thread (although that would at least
           solve the deadlock problem above), because we want to be able
           to receive C-g to interrupt the lisp thread.  */
        cancel_all_deferred_msgs ();
      }
    else
      signal_user_input ();
  }

  my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
}

/* Main window procedure */

static LRESULT CALLBACK
w32_wnd_proc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  struct frame *f;
  struct w32_display_info *dpyinfo = &one_w32_display_info;
  W32Msg wmsg;
  int windows_translate;
  int key;

  /* Note that it is okay to call x_window_to_frame, even though we are
     not running in the main lisp thread, because frame deletion
     requires the lisp thread to synchronize with this thread.  Thus, if
     a frame struct is returned, it can be used without concern that the
     lisp thread might make it disappear while we are using it.

     NB. Walking the frame list in this thread is safe (as long as
     writes of Lisp_Object slots are atomic, which they are on Windows).
     Although delete-frame can destructively modify the frame list while
     we are walking it, a garbage collection cannot occur until after
     delete-frame has synchronized with this thread.

     It is also safe to use functions that make GDI calls, such as
     w32_clear_rect, because these functions must obtain a DC handle
     from the frame struct using get_frame_dc which is thread-aware.  */

  switch (msg)
    {
    case WM_ERASEBKGND:
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f)
        {
          HDC hdc = get_frame_dc (f);
          GetUpdateRect (hwnd, &wmsg.rect, FALSE);
          w32_clear_rect (f, hdc, &wmsg.rect);
          release_frame_dc (f, hdc);

#if defined (W32_DEBUG_DISPLAY)
          DebPrint (("WM_ERASEBKGND (frame %p): erasing %d,%d-%d,%d\n",
                     f,
                     wmsg.rect.left, wmsg.rect.top,
                     wmsg.rect.right, wmsg.rect.bottom));
#endif /* W32_DEBUG_DISPLAY */
        }
      return 1;
    case WM_PALETTECHANGED:
      /* ignore our own changes */
      if ((HWND)wParam != hwnd)
        {
          f = x_window_to_frame (dpyinfo, hwnd);
          if (f)
            /* get_frame_dc will realize our palette and force all
               frames to be redrawn if needed. */
            release_frame_dc (f, get_frame_dc (f));
        }
      return 0;
    case WM_PAINT:
      {
        PAINTSTRUCT paintStruct;
        RECT update_rect;
        memset (&update_rect, 0, sizeof (update_rect));

        f = x_window_to_frame (dpyinfo, hwnd);
        if (f == 0)
          {
            DebPrint (("WM_PAINT received for unknown window %p\n", hwnd));
            return 0;
          }

        /* MSDN Docs say not to call BeginPaint if GetUpdateRect
           fails.  Apparently this can happen under some
           circumstances.  */
        if (GetUpdateRect (hwnd, &update_rect, FALSE) || !w32_strict_painting)
          {
            enter_crit ();
            BeginPaint (hwnd, &paintStruct);

            /* The rectangles returned by GetUpdateRect and BeginPaint
               do not always match.  Play it safe by assuming both areas
               are invalid.  */
            UnionRect (&(wmsg.rect), &update_rect, &(paintStruct.rcPaint));

#if defined (W32_DEBUG_DISPLAY)
            DebPrint (("WM_PAINT (frame %p): painting %d,%d-%d,%d\n",
                       f,
                       wmsg.rect.left, wmsg.rect.top,
                       wmsg.rect.right, wmsg.rect.bottom));
            DebPrint (("  [update region is %d,%d-%d,%d]\n",
                       update_rect.left, update_rect.top,
                       update_rect.right, update_rect.bottom));
#endif
            EndPaint (hwnd, &paintStruct);
            leave_crit ();

            /* Change the message type to prevent Windows from
               combining WM_PAINT messages in the Lisp thread's queue,
               since Windows assumes that each message queue is
               dedicated to one frame and does not bother checking
               that hwnd matches before combining them.  */
            my_post_msg (&wmsg, hwnd, WM_EMACS_PAINT, wParam, lParam);

            return 0;
          }

        /* If GetUpdateRect returns 0 (meaning there is no update
           region), assume the whole window needs to be repainted.  */
        GetClientRect (hwnd, &wmsg.rect);
        my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
        return 0;
      }

    case WM_INPUTLANGCHANGE:
      /* Inform lisp thread of keyboard layout changes.  */
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);

      /* Clear dead keys in the keyboard state; for simplicity only
         preserve modifier key states.  */
      {
        int i;
        BYTE keystate[256];

        GetKeyboardState (keystate);
        for (i = 0; i < 256; i++)
          if (1
              && i != VK_SHIFT
              && i != VK_LSHIFT
              && i != VK_RSHIFT
              && i != VK_CAPITAL
              && i != VK_NUMLOCK
              && i != VK_SCROLL
              && i != VK_CONTROL
              && i != VK_LCONTROL
              && i != VK_RCONTROL
              && i != VK_MENU
              && i != VK_LMENU
              && i != VK_RMENU
              && i != VK_LWIN
              && i != VK_RWIN)
            keystate[i] = 0;
        SetKeyboardState (keystate);
      }
      goto dflt;

    case WM_HOTKEY:
      /* Synchronize hot keys with normal input.  */
      PostMessage (hwnd, WM_KEYDOWN, HIWORD (lParam), 0);
      return (0);

    case WM_KEYUP:
    case WM_SYSKEYUP:
      record_keyup (wParam, lParam);
      goto dflt;

    case WM_KEYDOWN:
    case WM_SYSKEYDOWN:
      /* Ignore keystrokes we fake ourself; see below.  */
      if (dpyinfo->faked_key == wParam)
        {
          dpyinfo->faked_key = 0;
          /* Make sure TranslateMessage sees them though (as long as
             they don't produce WM_CHAR messages).  This ensures that
             indicator lights are toggled promptly on Windows 9x, for
             example.  */
          if (wParam < 256 && lispy_function_keys[wParam])
            {
              windows_translate = 1;
              goto translate;
            }
          return 0;
        }

      /* Synchronize modifiers with current keystroke.  */
      sync_modifiers ();
      record_keydown (wParam, lParam);
      wParam = map_keypad_keys (wParam, (lParam & 0x1000000L) != 0);

      windows_translate = 0;

      switch (wParam)
        {
        case VK_LWIN:
          if (NILP (Vw32_pass_lwindow_to_system))
            {
              /* Prevent system from acting on keyup (which opens the
                 Start menu if no other key was pressed) by simulating a
                 press of Space which we will ignore.  */
              if (GetAsyncKeyState (wParam) & 1)
                {
                  if (NUMBERP (Vw32_phantom_key_code))
                    key = XUINT (Vw32_phantom_key_code) & 255;
                  else
                    key = VK_SPACE;
                  dpyinfo->faked_key = key;
                  keybd_event (key, (BYTE) MapVirtualKey (key, 0), 0, 0);
                }
            }
          if (!NILP (Vw32_lwindow_modifier))
            return 0;
          break;
        case VK_RWIN:
          if (NILP (Vw32_pass_rwindow_to_system))
            {
              if (GetAsyncKeyState (wParam) & 1)
                {
                  if (NUMBERP (Vw32_phantom_key_code))
                    key = XUINT (Vw32_phantom_key_code) & 255;
                  else
                    key = VK_SPACE;
                  dpyinfo->faked_key = key;
                  keybd_event (key, (BYTE) MapVirtualKey (key, 0), 0, 0);
                }
            }
          if (!NILP (Vw32_rwindow_modifier))
            return 0;
          break;
        case VK_APPS:
          if (!NILP (Vw32_apps_modifier))
            return 0;
          break;
        case VK_MENU:
          if (NILP (Vw32_pass_alt_to_system))
            /* Prevent DefWindowProc from activating the menu bar if an
               Alt key is pressed and released by itself.  */
            return 0;
          windows_translate = 1;
          break;
        case VK_CAPITAL:
          /* Decide whether to treat as modifier or function key.  */
          if (NILP (Vw32_enable_caps_lock))
            goto disable_lock_key;
          windows_translate = 1;
          break;
        case VK_NUMLOCK:
          /* Decide whether to treat as modifier or function key.  */
          if (NILP (Vw32_enable_num_lock))
            goto disable_lock_key;
          windows_translate = 1;
          break;
        case VK_SCROLL:
          /* Decide whether to treat as modifier or function key.  */
          if (NILP (Vw32_scroll_lock_modifier))
            goto disable_lock_key;
          windows_translate = 1;
          break;
        disable_lock_key:
          /* Ensure the appropriate lock key state (and indicator light)
             remains in the same state. We do this by faking another
             press of the relevant key.  Apparently, this really is the
             only way to toggle the state of the indicator lights.  */
          dpyinfo->faked_key = wParam;
          keybd_event ((BYTE) wParam, (BYTE) MapVirtualKey (wParam, 0),
                       KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
          keybd_event ((BYTE) wParam, (BYTE) MapVirtualKey (wParam, 0),
                       KEYEVENTF_EXTENDEDKEY | 0, 0);
          keybd_event ((BYTE) wParam, (BYTE) MapVirtualKey (wParam, 0),
                       KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
          /* Ensure indicator lights are updated promptly on Windows 9x
             (TranslateMessage apparently does this), after forwarding
             input event.  */
          post_character_message (hwnd, msg, wParam, lParam,
                                  w32_get_key_modifiers (wParam, lParam));
          windows_translate = 1;
          break;
        case VK_CONTROL:
        case VK_SHIFT:
        case VK_PROCESSKEY:  /* Generated by IME.  */
          windows_translate = 1;
          break;
        case VK_CANCEL:
          /* Windows maps Ctrl-Pause (aka Ctrl-Break) into VK_CANCEL,
             which is confusing for purposes of key binding; convert
             VK_CANCEL events into VK_PAUSE events.  */
          wParam = VK_PAUSE;
          break;
        case VK_PAUSE:
          /* Windows maps Ctrl-NumLock into VK_PAUSE, which is confusing
             for purposes of key binding; convert these back into
             VK_NUMLOCK events, at least when we want to see NumLock key
             presses.  (Note that there is never any possibility that
             VK_PAUSE with Ctrl really is C-Pause as per above.)  */
          if (NILP (Vw32_enable_num_lock) && modifier_set (VK_CONTROL))
            wParam = VK_NUMLOCK;
          break;
        default:
          /* If not defined as a function key, change it to a WM_CHAR message. */
          if (wParam > 255 || !lispy_function_keys[wParam])
            {
              DWORD modifiers = construct_console_modifiers ();

              if (!NILP (Vw32_recognize_altgr)
                  && modifier_set (VK_LCONTROL) && modifier_set (VK_RMENU))
                {
                  /* Always let TranslateMessage handle AltGr key chords;
                     for some reason, ToAscii doesn't always process AltGr
                     chords correctly.  */
                  windows_translate = 1;
                }
              else if ((modifiers & (~SHIFT_PRESSED & ~CAPSLOCK_ON)) != 0)
                {
                  /* Handle key chords including any modifiers other
                     than shift directly, in order to preserve as much
                     modifier information as possible.  */
                  if ('A' <= wParam && wParam <= 'Z')
                    {
                      /* Don't translate modified alphabetic keystrokes,
                         so the user doesn't need to constantly switch
                         layout to type control or meta keystrokes when
                         the normal layout translates alphabetic
                         characters to non-ascii characters.  */
                      if (!modifier_set (VK_SHIFT))
                        wParam += ('a' - 'A');
                      msg = WM_CHAR;
                    }
                  else
                    {
                      /* Try to handle other keystrokes by determining the
                         base character (ie. translating the base key plus
                         shift modifier).  */
                      int add;
                      KEY_EVENT_RECORD key;

                      key.bKeyDown = TRUE;
                      key.wRepeatCount = 1;
                      key.wVirtualKeyCode = wParam;
                      key.wVirtualScanCode = (lParam & 0xFF0000) >> 16;
                      key.uChar.AsciiChar = 0;
                      key.dwControlKeyState = modifiers;

                      add = w32_kbd_patch_key (&key, w32_keyboard_codepage);
                      /* 0 means an unrecognized keycode, negative means
                         dead key.  Ignore both.  */
                      while (--add >= 0)
                        {
                          /* Forward asciified character sequence.  */
                          post_character_message
                            (hwnd, WM_CHAR,
                             (unsigned char) key.uChar.AsciiChar, lParam,
                             w32_get_key_modifiers (wParam, lParam));
                          w32_kbd_patch_key (&key, w32_keyboard_codepage);
                        }
                      return 0;
                    }
                }
              else
                {
                  /* Let TranslateMessage handle everything else.  */
                  windows_translate = 1;
                }
            }
        }

    translate:
      if (windows_translate)
        {
          MSG windows_msg = { hwnd, msg, wParam, lParam, 0, {0,0} };
          windows_msg.time = GetMessageTime ();
          TranslateMessage (&windows_msg);
          goto dflt;
        }

      /* Fall through */

    case WM_SYSCHAR:
    case WM_CHAR:
      if (wParam > 255 )
        {
          W32Msg wmsg;

          wmsg.dwModifiers = w32_get_key_modifiers (wParam, lParam);
          signal_user_input ();
          my_post_msg (&wmsg, hwnd, WM_UNICHAR, wParam, lParam);

        }
      else
        post_character_message (hwnd, msg, wParam, lParam,
                                w32_get_key_modifiers (wParam, lParam));
      break;

    case WM_UNICHAR:
      /* WM_UNICHAR looks promising from the docs, but the exact
         circumstances in which TranslateMessage sends it is one of those
         Microsoft secret API things that EU and US courts are supposed
         to have put a stop to already. Spy++ shows it being sent to Notepad
         and other MS apps, but never to Emacs.

         Some third party IMEs send it in accordance with the official
         documentation though, so handle it here.

         UNICODE_NOCHAR is used to test for support for this message.
         TRUE indicates that the message is supported.  */
      if (wParam == UNICODE_NOCHAR)
        return TRUE;

      {
        W32Msg wmsg;
        wmsg.dwModifiers = w32_get_key_modifiers (wParam, lParam);
        signal_user_input ();
        my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      }
      break;

    case WM_IME_CHAR:
      /* If we can't get the IME result as Unicode, use default processing,
         which will at least allow characters decodable in the system locale
         get through.  */
      if (!get_composition_string_fn)
        goto dflt;

      else if (!ignore_ime_char)
        {
          wchar_t * buffer;
          int size, i;
          W32Msg wmsg;
          HIMC context = get_ime_context_fn (hwnd);
          wmsg.dwModifiers = w32_get_key_modifiers (wParam, lParam);
          /* Get buffer size.  */
          size = get_composition_string_fn (context, GCS_RESULTSTR, NULL, 0);
          buffer = alloca (size);
          size = get_composition_string_fn (context, GCS_RESULTSTR,
                                            buffer, size);
          release_ime_context_fn (hwnd, context);

          signal_user_input ();
          for (i = 0; i < size / sizeof (wchar_t); i++)
            {
              my_post_msg (&wmsg, hwnd, WM_UNICHAR, (WPARAM) buffer[i],
                           lParam);
            }
          /* Ignore the messages for the rest of the
             characters in the string that was output above.  */
          ignore_ime_char = (size / sizeof (wchar_t)) - 1;
        }
      else
        ignore_ime_char--;

      break;

    case WM_IME_STARTCOMPOSITION:
      if (!set_ime_composition_window_fn)
        goto dflt;
      else
        {
          COMPOSITIONFORM form;
          HIMC context;
          struct window *w;

          /* Implementation note: The code below does something that
             one shouldn't do: it accesses the window object from a
             separate thread, while the main (a.k.a. "Lisp") thread
             runs and can legitimately delete and even GC it.  That is
             why we are extra careful not to futz with a window that
             is different from the one recorded when the system caret
             coordinates were last modified.  That is also why we are
             careful not to move the IME window if the window
             described by W was deleted, as indicated by its buffer
             field being reset to nil.  */
          f = x_window_to_frame (dpyinfo, hwnd);
          if (!(f && FRAME_LIVE_P (f)))
            break;
          w = XWINDOW (FRAME_SELECTED_WINDOW (f));
          /* Punt if someone changed the frame's selected window
             behind our back. */
          if (w != w32_system_caret_window)
            break;

          form.dwStyle = CFS_RECT;
          form.ptCurrentPos.x = w32_system_caret_x;
          form.ptCurrentPos.y = w32_system_caret_y;

          form.rcArea.left = WINDOW_TEXT_TO_FRAME_PIXEL_X (w, 0);
          form.rcArea.top = (WINDOW_TOP_EDGE_Y (w)
                             + w32_system_caret_hdr_height);
          form.rcArea.right = (WINDOW_BOX_RIGHT_EDGE_X (w)
                               - WINDOW_RIGHT_MARGIN_WIDTH (w)
                               - WINDOW_RIGHT_FRINGE_WIDTH (w));
          form.rcArea.bottom = (WINDOW_BOTTOM_EDGE_Y (w)
                                - w32_system_caret_mode_height);

          /* Punt if the window was deleted behind our back.  */
          if (!BUFFERP (w->contents))
            break;

          context = get_ime_context_fn (hwnd);

          if (!context)
            break;

          set_ime_composition_window_fn (context, &form);
          release_ime_context_fn (hwnd, context);
        }
      break;

    case WM_IME_ENDCOMPOSITION:
      ignore_ime_char = 0;
      goto dflt;

      /* Simulate middle mouse button events when left and right buttons
         are used together, but only if user has two button mouse. */
    case WM_LBUTTONDOWN:
    case WM_RBUTTONDOWN:
      if (w32_num_mouse_buttons > 2)
        goto handle_plain_button;

      {
        int this = (msg == WM_LBUTTONDOWN) ? LMOUSE : RMOUSE;
        int other = (msg == WM_LBUTTONDOWN) ? RMOUSE : LMOUSE;

        if (button_state & this)
          return 0;

        if (button_state == 0)
          SetCapture (hwnd);

        button_state |= this;

        if (button_state & other)
          {
            if (mouse_button_timer)
              {
                KillTimer (hwnd, mouse_button_timer);
                mouse_button_timer = 0;

                /* Generate middle mouse event instead. */
                msg = WM_MBUTTONDOWN;
                button_state |= MMOUSE;
              }
            else if (button_state & MMOUSE)
              {
                /* Ignore button event if we've already generated a
                   middle mouse down event.  This happens if the
                   user releases and press one of the two buttons
                   after we've faked a middle mouse event. */
                return 0;
              }
            else
              {
                /* Flush out saved message. */
                post_msg (&saved_mouse_button_msg);
              }
            wmsg.dwModifiers = w32_get_modifiers ();
            my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
            signal_user_input ();

            /* Clear message buffer. */
            saved_mouse_button_msg.msg.hwnd = 0;
          }
        else
          {
            /* Hold onto message for now. */
            mouse_button_timer =
              SetTimer (hwnd, MOUSE_BUTTON_ID,
                        w32_mouse_button_tolerance, NULL);
            saved_mouse_button_msg.msg.hwnd = hwnd;
            saved_mouse_button_msg.msg.message = msg;
            saved_mouse_button_msg.msg.wParam = wParam;
            saved_mouse_button_msg.msg.lParam = lParam;
            saved_mouse_button_msg.msg.time = GetMessageTime ();
            saved_mouse_button_msg.dwModifiers = w32_get_modifiers ();
          }
      }
      return 0;

    case WM_LBUTTONUP:
    case WM_RBUTTONUP:
      if (w32_num_mouse_buttons > 2)
        goto handle_plain_button;

      {
        int this = (msg == WM_LBUTTONUP) ? LMOUSE : RMOUSE;
        int other = (msg == WM_LBUTTONUP) ? RMOUSE : LMOUSE;

        if ((button_state & this) == 0)
          return 0;

        button_state &= ~this;

        if (button_state & MMOUSE)
          {
            /* Only generate event when second button is released. */
            if ((button_state & other) == 0)
              {
                msg = WM_MBUTTONUP;
                button_state &= ~MMOUSE;

                if (button_state) emacs_abort ();
              }
            else
              return 0;
          }
        else
          {
            /* Flush out saved message if necessary. */
            if (saved_mouse_button_msg.msg.hwnd)
              {
                post_msg (&saved_mouse_button_msg);
              }
          }
        wmsg.dwModifiers = w32_get_modifiers ();
        my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
        signal_user_input ();

        /* Always clear message buffer and cancel timer. */
        saved_mouse_button_msg.msg.hwnd = 0;
        KillTimer (hwnd, mouse_button_timer);
        mouse_button_timer = 0;

        if (button_state == 0)
          ReleaseCapture ();
      }
      return 0;

    case WM_XBUTTONDOWN:
    case WM_XBUTTONUP:
      if (w32_pass_extra_mouse_buttons_to_system)
        goto dflt;
      /* else fall through and process them.  */
    case WM_MBUTTONDOWN:
    case WM_MBUTTONUP:
    handle_plain_button:
      {
        BOOL up;
        int button;

        /* Ignore middle and extra buttons as long as the menu is active.  */
        f = x_window_to_frame (dpyinfo, hwnd);
        if (f && f->output_data.w32->menubar_active)
          return 0;

        if (parse_button (msg, HIWORD (wParam), &button, &up))
          {
            if (up) ReleaseCapture ();
            else SetCapture (hwnd);
            button = (button == 0) ? LMOUSE :
              ((button == 1) ? MMOUSE  : RMOUSE);
            if (up)
              button_state &= ~button;
            else
              button_state |= button;
          }
      }

      wmsg.dwModifiers = w32_get_modifiers ();
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      signal_user_input ();

      /* Need to return true for XBUTTON messages, false for others,
         to indicate that we processed the message.  */
      return (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONUP);

    case WM_MOUSEMOVE:
      /* Ignore mouse movements as long as the menu is active.  These
         movements are processed by the window manager anyway, and
         it's wrong to handle them as if they happened on the
         underlying frame.  */
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f && f->output_data.w32->menubar_active)
        return 0;

      /* If the mouse has just moved into the frame, start tracking
         it, so we will be notified when it leaves the frame.  Mouse
         tracking only works under W98 and NT4 and later. On earlier
         versions, there is no way of telling when the mouse leaves the
         frame, so we just have to put up with help-echo and mouse
         highlighting remaining while the frame is not active.  */
      if (track_mouse_event_fn && !track_mouse_window
          /* If the menu bar is active, turning on tracking of mouse
             movement events might send these events to the tooltip
             frame, if the user happens to move the mouse pointer over
             the tooltip.  But since we don't process events for
             tooltip frames, this causes Windows to present a
             hourglass cursor, which is ugly and unexpected.  So don't
             enable tracking mouse events in this case; they will be
             restarted when the menu pops down.  (Confusingly, the
             menubar_active member of f->output_data.w32, tested
             above, is only set when a menu was popped up _not_ from
             the frame's menu bar, but via x-popup-menu.)  */
          && !menubar_in_use)
        {
          TRACKMOUSEEVENT tme;
          tme.cbSize = sizeof (tme);
          tme.dwFlags = TME_LEAVE;
          tme.hwndTrack = hwnd;

          track_mouse_event_fn (&tme);
          track_mouse_window = hwnd;
        }
    case WM_VSCROLL:
      if (w32_mouse_move_interval <= 0
          || (msg == WM_MOUSEMOVE && button_state == 0))
        {
          wmsg.dwModifiers = w32_get_modifiers ();
          my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
          return 0;
        }

      /* Hang onto mouse move and scroll messages for a bit, to avoid
         sending such events to Emacs faster than it can process them.
         If we get more events before the timer from the first message
         expires, we just replace the first message. */

      if (saved_mouse_move_msg.msg.hwnd == 0)
        mouse_move_timer =
          SetTimer (hwnd, MOUSE_MOVE_ID,
                    w32_mouse_move_interval, NULL);

      /* Hold onto message for now. */
      saved_mouse_move_msg.msg.hwnd = hwnd;
      saved_mouse_move_msg.msg.message = msg;
      saved_mouse_move_msg.msg.wParam = wParam;
      saved_mouse_move_msg.msg.lParam = lParam;
      saved_mouse_move_msg.msg.time = GetMessageTime ();
      saved_mouse_move_msg.dwModifiers = w32_get_modifiers ();

      return 0;

    case WM_MOUSEWHEEL:
    case WM_DROPFILES:
      wmsg.dwModifiers = w32_get_modifiers ();
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      signal_user_input ();
      return 0;

    case WM_APPCOMMAND:
      if (w32_pass_multimedia_buttons_to_system)
        goto dflt;
      /* Otherwise, pass to lisp, the same way we do with mousehwheel.  */
    case WM_MOUSEHWHEEL:
      wmsg.dwModifiers = w32_get_modifiers ();
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      signal_user_input ();
      /* Non-zero must be returned when WM_MOUSEHWHEEL messages are
         handled, to prevent the system trying to handle it by faking
         scroll bar events.  */
      return 1;

    case WM_TIMER:
      /* Flush out saved messages if necessary. */
      if (wParam == mouse_button_timer)
        {
          if (saved_mouse_button_msg.msg.hwnd)
            {
              post_msg (&saved_mouse_button_msg);
              signal_user_input ();
              saved_mouse_button_msg.msg.hwnd = 0;
            }
          KillTimer (hwnd, mouse_button_timer);
          mouse_button_timer = 0;
        }
      else if (wParam == mouse_move_timer)
        {
          if (saved_mouse_move_msg.msg.hwnd)
            {
              post_msg (&saved_mouse_move_msg);
              saved_mouse_move_msg.msg.hwnd = 0;
            }
          KillTimer (hwnd, mouse_move_timer);
          mouse_move_timer = 0;
        }
      else if (wParam == menu_free_timer)
        {
          KillTimer (hwnd, menu_free_timer);
          menu_free_timer = 0;
          f = x_window_to_frame (dpyinfo, hwnd);
          /* If a popup menu is active, don't wipe its strings.  */
          if (menubar_in_use
              && current_popup_menu == NULL)
            {
              /* Free memory used by owner-drawn and help-echo strings.  */
              w32_free_menu_strings (hwnd);
              if (f)
                f->output_data.w32->menubar_active = 0;
              menubar_in_use = 0;
            }
        }
      return 0;

    case WM_NCACTIVATE:
      /* Windows doesn't send us focus messages when putting up and
         taking down a system popup dialog as for Ctrl-Alt-Del on Windows 95.
         The only indication we get that something happened is receiving
         this message afterwards.  So this is a good time to reset our
         keyboard modifiers' state. */
      reset_modifiers ();
      goto dflt;

    case WM_INITMENU:
      button_state = 0;
      ReleaseCapture ();
      /* We must ensure menu bar is fully constructed and up to date
         before allowing user interaction with it.  To achieve this
         we send this message to the lisp thread and wait for a
         reply (whose value is not actually needed) to indicate that
         the menu bar is now ready for use, so we can now return.

         To remain responsive in the meantime, we enter a nested message
         loop that can process all other messages.

         However, we skip all this if the message results from calling
         TrackPopupMenu - in fact, we must NOT attempt to send the lisp
         thread a message because it is blocked on us at this point.  We
         set menubar_active before calling TrackPopupMenu to indicate
         this (there is no possibility of confusion with real menubar
         being active).  */

      f = x_window_to_frame (dpyinfo, hwnd);
      if (f
          && (f->output_data.w32->menubar_active
              /* We can receive this message even in the absence of a
                 menubar (ie. when the system menu is activated) - in this
                 case we do NOT want to forward the message, otherwise it
                 will cause the menubar to suddenly appear when the user
                 had requested it to be turned off!  */
              || f->output_data.w32->menubar_widget == NULL))
        return 0;

      {
        deferred_msg msg_buf;

        /* Detect if message has already been deferred; in this case
           we cannot return any sensible value to ignore this.  */
        if (find_deferred_msg (hwnd, msg) != NULL)
          emacs_abort ();

        menubar_in_use = 1;

        return send_deferred_msg (&msg_buf, hwnd, msg, wParam, lParam);
      }

    case WM_EXITMENULOOP:
      f = x_window_to_frame (dpyinfo, hwnd);

      /* If a menu is still active, check again after a short delay,
         since Windows often (always?) sends the WM_EXITMENULOOP
         before the corresponding WM_COMMAND message.
         Don't do this if a popup menu is active, since it is only
         menubar menus that require cleaning up in this way.
      */
      if (f && menubar_in_use && current_popup_menu == NULL)
        menu_free_timer = SetTimer (hwnd, MENU_FREE_ID, MENU_FREE_DELAY, NULL);

      /* If hourglass cursor should be displayed, display it now.  */
      if (f && f->output_data.w32->hourglass_p)
        SetCursor (f->output_data.w32->hourglass_cursor);

      goto dflt;

    case WM_MENUSELECT:
      /* Direct handling of help_echo in menus.  Should be safe now
         that we generate the help_echo by placing a help event in the
         keyboard buffer.  */
      {
        HMENU menu = (HMENU) lParam;
        UINT menu_item = (UINT) LOWORD (wParam);
        UINT flags = (UINT) HIWORD (wParam);

        w32_menu_display_help (hwnd, menu, menu_item, flags);
      }
      return 0;

    case WM_MEASUREITEM:
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f)
        {
          MEASUREITEMSTRUCT * pMis = (MEASUREITEMSTRUCT *) lParam;

          if (pMis->CtlType == ODT_MENU)
            {
              /* Work out dimensions for popup menu titles. */
              char * title = (char *) pMis->itemData;
              HDC hdc = GetDC (hwnd);
              HFONT menu_font = GetCurrentObject (hdc, OBJ_FONT);
              LOGFONT menu_logfont;
              HFONT old_font;
              SIZE size;

              GetObject (menu_font, sizeof (menu_logfont), &menu_logfont);
              menu_logfont.lfWeight = FW_BOLD;
              menu_font = CreateFontIndirect (&menu_logfont);
              old_font = SelectObject (hdc, menu_font);

              pMis->itemHeight = GetSystemMetrics (SM_CYMENUSIZE);
              if (title)
                {
                  if (unicode_append_menu)
                    GetTextExtentPoint32W (hdc, (WCHAR *) title,
                                           wcslen ((WCHAR *) title),
                                           &size);
                  else
                    GetTextExtentPoint32 (hdc, title, strlen (title), &size);

                  pMis->itemWidth = size.cx;
                  if (pMis->itemHeight < size.cy)
                    pMis->itemHeight = size.cy;
                }
              else
                pMis->itemWidth = 0;

              SelectObject (hdc, old_font);
              DeleteObject (menu_font);
              ReleaseDC (hwnd, hdc);
              return TRUE;
            }
        }
      return 0;

    case WM_DRAWITEM:
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f)
        {
          DRAWITEMSTRUCT * pDis = (DRAWITEMSTRUCT *) lParam;

          if (pDis->CtlType == ODT_MENU)
            {
              /* Draw popup menu title. */
              char * title = (char *) pDis->itemData;
              if (title)
                {
                  HDC hdc = pDis->hDC;
                  HFONT menu_font = GetCurrentObject (hdc, OBJ_FONT);
                  LOGFONT menu_logfont;
                  HFONT old_font;

                  GetObject (menu_font, sizeof (menu_logfont), &menu_logfont);
                  menu_logfont.lfWeight = FW_BOLD;
                  menu_font = CreateFontIndirect (&menu_logfont);
                  old_font = SelectObject (hdc, menu_font);

                  /* Always draw title as if not selected.  */
                  if (unicode_append_menu)
                    ExtTextOutW (hdc,
                                 pDis->rcItem.left
                                 + GetSystemMetrics (SM_CXMENUCHECK),
                                 pDis->rcItem.top,
                                 ETO_OPAQUE, &pDis->rcItem,
                                 (WCHAR *) title,
                                 wcslen ((WCHAR *) title), NULL);
                  else
                    ExtTextOut (hdc,
                                pDis->rcItem.left
                                + GetSystemMetrics (SM_CXMENUCHECK),
                                pDis->rcItem.top,
                                ETO_OPAQUE, &pDis->rcItem,
                                title, strlen (title), NULL);

                  SelectObject (hdc, old_font);
                  DeleteObject (menu_font);
                }
              return TRUE;
            }
        }
      return 0;

#if 0
      /* Still not right - can't distinguish between clicks in the
         client area of the frame from clicks forwarded from the scroll
         bars - may have to hook WM_NCHITTEST to remember the mouse
         position and then check if it is in the client area ourselves.  */
    case WM_MOUSEACTIVATE:
      /* Discard the mouse click that activates a frame, allowing the
         user to click anywhere without changing point (or worse!).
         Don't eat mouse clicks on scrollbars though!!  */
      if (LOWORD (lParam) == HTCLIENT )
        return MA_ACTIVATEANDEAT;
      goto dflt;
#endif

    case WM_MOUSELEAVE:
      /* No longer tracking mouse.  */
      track_mouse_window = NULL;

    case WM_ACTIVATEAPP:
    case WM_ACTIVATE:
    case WM_WINDOWPOSCHANGED:
    case WM_SHOWWINDOW:
      /* Inform lisp thread that a frame might have just been obscured
         or exposed, so should recheck visibility of all frames.  */
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      goto dflt;

    case WM_SETFOCUS:
      dpyinfo->faked_key = 0;
      reset_modifiers ();
      register_hot_keys (hwnd);
      goto command;
    case WM_KILLFOCUS:
      unregister_hot_keys (hwnd);
      button_state = 0;
      ReleaseCapture ();
      /* Relinquish the system caret.  */
      if (w32_system_caret_hwnd)
        {
          w32_visible_system_caret_hwnd = NULL;
          w32_system_caret_hwnd = NULL;
          DestroyCaret ();
        }
      goto command;
    case WM_COMMAND:
      menubar_in_use = 0;
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f && HIWORD (wParam) == 0)
        {
          if (menu_free_timer)
            {
              KillTimer (hwnd, menu_free_timer);
              menu_free_timer = 0;
            }
        }
    case WM_MOVE:
    case WM_SIZE:
    command:
      wmsg.dwModifiers = w32_get_modifiers ();
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      goto dflt;

    case WM_DESTROY:
      CoUninitialize ();
      return 0;

    case WM_CLOSE:
      wmsg.dwModifiers = w32_get_modifiers ();
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      return 0;

    case WM_WINDOWPOSCHANGING:
      /* Don't restrict the sizing of tip frames.  */
      if (hwnd == tip_window)
        return 0;

      /* Don't restrict the sizing of fullscreened frames, allowing them to be
         flush with the sides of the screen.  */
      f = x_window_to_frame (dpyinfo, hwnd);
      if (f && FRAME_PREV_FSMODE (f) != FULLSCREEN_NONE)
        return 0;

      {
        WINDOWPLACEMENT wp;
        LPWINDOWPOS lppos = (WINDOWPOS *) lParam;

        wp.length = sizeof (WINDOWPLACEMENT);
        GetWindowPlacement (hwnd, &wp);

        if (wp.showCmd != SW_SHOWMINIMIZED && (lppos->flags & SWP_NOSIZE) == 0)
          {
            RECT rect;
            int wdiff;
            int hdiff;
            DWORD font_width;
            DWORD line_height;
            DWORD internal_border;
            DWORD scrollbar_extra;
            RECT wr;

            wp.length = sizeof (wp);
            GetWindowRect (hwnd, &wr);

            enter_crit ();

            font_width = GetWindowLong (hwnd, WND_FONTWIDTH_INDEX);
            line_height = GetWindowLong (hwnd, WND_LINEHEIGHT_INDEX);
            internal_border = GetWindowLong (hwnd, WND_BORDER_INDEX);
            scrollbar_extra = GetWindowLong (hwnd, WND_SCROLLBAR_INDEX);

            leave_crit ();

            memset (&rect, 0, sizeof (rect));
            AdjustWindowRect (&rect, GetWindowLong (hwnd, GWL_STYLE),
                              GetMenu (hwnd) != NULL);

            /* Force width and height of client area to be exact
               multiples of the character cell dimensions.  */
            wdiff = (lppos->cx - (rect.right - rect.left)
                     - 2 * internal_border - scrollbar_extra)
              % font_width;
            hdiff = (lppos->cy - (rect.bottom - rect.top)
                     - 2 * internal_border)
              % line_height;

            if (wdiff || hdiff)
              {
                /* For right/bottom sizing we can just fix the sizes.
                   However for top/left sizing we will need to fix the X
                   and Y positions as well.  */

                int cx_mintrack = GetSystemMetrics (SM_CXMINTRACK);
                int cy_mintrack = GetSystemMetrics (SM_CYMINTRACK);

                lppos->cx = max (lppos->cx - wdiff, cx_mintrack);
                lppos->cy = max (lppos->cy - hdiff, cy_mintrack);

                if (wp.showCmd != SW_SHOWMAXIMIZED
                    && (lppos->flags & SWP_NOMOVE) == 0)
                  {
                    if (lppos->x != wr.left || lppos->y != wr.top)
                      {
                        lppos->x += wdiff;
                        lppos->y += hdiff;
                      }
                    else
                      {
                        lppos->flags |= SWP_NOMOVE;
                      }
                  }

                return 0;
              }
          }
      }

      goto dflt;

    case WM_GETMINMAXINFO:
      /* Hack to allow resizing the Emacs frame above the screen size.
         Note that Windows 9x limits coordinates to 16-bits.  */
      ((LPMINMAXINFO) lParam)->ptMaxTrackSize.x = 32767;
      ((LPMINMAXINFO) lParam)->ptMaxTrackSize.y = 32767;
      return 0;

    case WM_SETCURSOR:
      if (LOWORD (lParam) == HTCLIENT)
        {
          f = x_window_to_frame (dpyinfo, hwnd);
          if (f && f->output_data.w32->hourglass_p
              && !menubar_in_use && !current_popup_menu)
            SetCursor (f->output_data.w32->hourglass_cursor);
          else if (f)
            SetCursor (f->output_data.w32->current_cursor);
          return 0;
        }
      goto dflt;

    case WM_EMACS_SETCURSOR:
      {
        Cursor cursor = (Cursor) wParam;
        f = x_window_to_frame (dpyinfo, hwnd);
        if (f && cursor)
          {
            f->output_data.w32->current_cursor = cursor;
            if (!f->output_data.w32->hourglass_p)
              SetCursor (cursor);
          }
        return 0;
      }

    case WM_EMACS_CREATESCROLLBAR:
      return (LRESULT) w32_createscrollbar ((struct frame *) wParam,
                                            (struct scroll_bar *) lParam);

    case WM_EMACS_SHOWWINDOW:
      return ShowWindow ((HWND) wParam, (WPARAM) lParam);

    case WM_EMACS_BRINGTOTOP:
    case WM_EMACS_SETFOREGROUND:
      {
        HWND foreground_window;
        DWORD foreground_thread, retval;

        /* On NT 5.0, and apparently Windows 98, it is necessary to
           attach to the thread that currently has focus in order to
           pull the focus away from it.  */
        foreground_window = GetForegroundWindow ();
        foreground_thread = GetWindowThreadProcessId (foreground_window, NULL);
        if (!foreground_window
            || foreground_thread == GetCurrentThreadId ()
            || !AttachThreadInput (GetCurrentThreadId (),
                                   foreground_thread, TRUE))
          foreground_thread = 0;

        retval = SetForegroundWindow ((HWND) wParam);
        if (msg == WM_EMACS_BRINGTOTOP)
          retval = BringWindowToTop ((HWND) wParam);

        /* Detach from the previous foreground thread.  */
        if (foreground_thread)
          AttachThreadInput (GetCurrentThreadId (),
                             foreground_thread, FALSE);

        return retval;
      }

    case WM_EMACS_SETWINDOWPOS:
      {
        WINDOWPOS * pos = (WINDOWPOS *) wParam;
        return SetWindowPos (hwnd, pos->hwndInsertAfter,
                             pos->x, pos->y, pos->cx, pos->cy, pos->flags);
      }

    case WM_EMACS_DESTROYWINDOW:
      DragAcceptFiles ((HWND) wParam, FALSE);
      return DestroyWindow ((HWND) wParam);

    case WM_EMACS_HIDE_CARET:
      return HideCaret (hwnd);

    case WM_EMACS_SHOW_CARET:
      return ShowCaret (hwnd);

    case WM_EMACS_DESTROY_CARET:
      w32_system_caret_hwnd = NULL;
      w32_visible_system_caret_hwnd = NULL;
      return DestroyCaret ();

    case WM_EMACS_TRACK_CARET:
      /* If there is currently no system caret, create one.  */
      if (w32_system_caret_hwnd == NULL)
        {
          /* Use the default caret width, and avoid changing it
             unnecessarily, as it confuses screen reader software.  */
          w32_system_caret_hwnd = hwnd;
          CreateCaret (hwnd, NULL, 0,
                       w32_system_caret_height);
        }

      if (!SetCaretPos (w32_system_caret_x, w32_system_caret_y))
        return 0;
      /* Ensure visible caret gets turned on when requested.  */
      else if (w32_use_visible_system_caret
               && w32_visible_system_caret_hwnd != hwnd)
        {
          w32_visible_system_caret_hwnd = hwnd;
          return ShowCaret (hwnd);
        }
      /* Ensure visible caret gets turned off when requested.  */
      else if (!w32_use_visible_system_caret
               && w32_visible_system_caret_hwnd)
        {
          w32_visible_system_caret_hwnd = NULL;
          return HideCaret (hwnd);
        }
      else
        return 1;

    case WM_EMACS_TRACKPOPUPMENU:
      {
        UINT flags;
        POINT *pos;
        int retval;
        pos = (POINT *)lParam;
        flags = TPM_CENTERALIGN;
        if (button_state & LMOUSE)
          flags |= TPM_LEFTBUTTON;
        else if (button_state & RMOUSE)
          flags |= TPM_RIGHTBUTTON;

        /* Remember we did a SetCapture on the initial mouse down event,
           so for safety, we make sure the capture is canceled now.  */
        ReleaseCapture ();
        button_state = 0;

        /* Use menubar_active to indicate that WM_INITMENU is from
           TrackPopupMenu below, and should be ignored.  */
        f = x_window_to_frame (dpyinfo, hwnd);
        if (f)
          f->output_data.w32->menubar_active = 1;

        if (TrackPopupMenu ((HMENU)wParam, flags, pos->x, pos->y,
                            0, hwnd, NULL))
          {
            MSG amsg;
            /* Eat any mouse messages during popupmenu */
            while (PeekMessage (&amsg, hwnd, WM_MOUSEFIRST, WM_MOUSELAST,
                                PM_REMOVE));
            /* Get the menu selection, if any */
            if (PeekMessage (&amsg, hwnd, WM_COMMAND, WM_COMMAND, PM_REMOVE))
              {
                retval =  LOWORD (amsg.wParam);
              }
            else
              {
                retval = 0;
              }
          }
        else
          {
            retval = -1;
          }

        return retval;
      }
    case WM_EMACS_FILENOTIFY:
      my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
      return 1;

    default:
      /* Check for messages registered at runtime. */
      if (msg == msh_mousewheel)
        {
          wmsg.dwModifiers = w32_get_modifiers ();
          my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
          signal_user_input ();
          return 0;
        }

    dflt:
      return (w32_unicode_gui ? DefWindowProcW :  DefWindowProcA) (hwnd, msg, wParam, lParam);
    }

  /* The most common default return code for handled messages is 0.  */
  return 0;
}

static void
my_create_window (struct frame * f)
{
  MSG msg;

  if (!PostThreadMessage (dwWindowsThreadId, WM_EMACS_CREATEWINDOW, (WPARAM)f, 0))
    emacs_abort ();
  GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE);
}


/* Create a tooltip window. Unlike my_create_window, we do not do this
   indirectly via the Window thread, as we do not need to process Window
   messages for the tooltip.  Creating tooltips indirectly also creates
   deadlocks when tooltips are created for menu items.  */
static void
my_create_tip_window (struct frame *f)
{
  RECT rect;

  rect.left = rect.top = 0;
  rect.right = FRAME_PIXEL_WIDTH (f);
  rect.bottom = FRAME_PIXEL_HEIGHT (f);

  AdjustWindowRect (&rect, f->output_data.w32->dwStyle,
                    FRAME_EXTERNAL_MENU_BAR (f));

  tip_window = FRAME_W32_WINDOW (f)
    = CreateWindow (EMACS_CLASS,
                    f->namebuf,
                    f->output_data.w32->dwStyle,
                    f->left_pos,
                    f->top_pos,
                    rect.right - rect.left,
                    rect.bottom - rect.top,
                    FRAME_W32_WINDOW (SELECTED_FRAME ()), /* owner */
                    NULL,
                    hinst,
                    NULL);

  if (tip_window)
    {
      SetWindowLong (tip_window, WND_FONTWIDTH_INDEX, FRAME_COLUMN_WIDTH (f));
      SetWindowLong (tip_window, WND_LINEHEIGHT_INDEX, FRAME_LINE_HEIGHT (f));
      SetWindowLong (tip_window, WND_BORDER_INDEX, FRAME_INTERNAL_BORDER_WIDTH (f));
      SetWindowLong (tip_window, WND_BACKGROUND_INDEX, FRAME_BACKGROUND_PIXEL (f));

      /* Tip frames have no scrollbars.  */
      SetWindowLong (tip_window, WND_SCROLLBAR_INDEX, 0);

      /* Do this to discard the default setting specified by our parent. */
      ShowWindow (tip_window, SW_HIDE);
    }
}


/* Create and set up the w32 window for frame F.  */

static void
w32_window (struct frame *f, long window_prompting, int minibuffer_only)
{
  block_input ();

  /* Use the resource name as the top-level window name
     for looking up resources.  Make a non-Lisp copy
     for the window manager, so GC relocation won't bother it.

     Elsewhere we specify the window name for the window manager.  */
  f->namebuf = xstrdup (SSDATA (Vx_resource_name));

  my_create_window (f);

  validate_x_resource_name ();

  /* x_set_name normally ignores requests to set the name if the
     requested name is the same as the current name.  This is the one
     place where that assumption isn't correct; f->name is set, but
     the server hasn't been told.  */
  {
    Lisp_Object name;
    int explicit = f->explicit_name;

    f->explicit_name = 0;
    name = f->name;
    fset_name (f, Qnil);
    x_set_name (f, name, explicit);
  }

  unblock_input ();

  if (!minibuffer_only && FRAME_EXTERNAL_MENU_BAR (f))
    initialize_frame_menubar (f);

  if (FRAME_W32_WINDOW (f) == 0)
    error ("Unable to create window");
}

/* Handle the icon stuff for this window.  Perhaps later we might
   want an x_set_icon_position which can be called interactively as
   well.  */

static void
x_icon (struct frame *f, Lisp_Object parms)
{
  Lisp_Object icon_x, icon_y;
  struct w32_display_info *dpyinfo = &one_w32_display_info;

  /* Set the position of the icon.  Note that Windows 95 groups all
     icons in the tray.  */
  icon_x = x_get_arg (dpyinfo, parms, Qicon_left, 0, 0, RES_TYPE_NUMBER);
  icon_y = x_get_arg (dpyinfo, parms, Qicon_top, 0, 0, RES_TYPE_NUMBER);
  if (!EQ (icon_x, Qunbound) && !EQ (icon_y, Qunbound))
    {
      CHECK_NUMBER (icon_x);
      CHECK_NUMBER (icon_y);
    }
  else if (!EQ (icon_x, Qunbound) || !EQ (icon_y, Qunbound))
    error ("Both left and top icon corners of icon must be specified");

  block_input ();

#if 0 /* TODO */
  /* Start up iconic or window? */
  x_wm_set_window_state
    (f, (EQ (x_get_arg (dpyinfo, parms, Qvisibility, 0, 0, RES_TYPE_SYMBOL), Qicon)
         ? IconicState
         : NormalState));

  x_text_icon (f, SSDATA ((!NILP (f->icon_name)
                           ? f->icon_name
                           : f->name)));
#endif

  unblock_input ();
}


static void
x_make_gc (struct frame *f)
{
  XGCValues gc_values;

  block_input ();

  /* Create the GC's of this frame.
     Note that many default values are used.  */

  /* Normal video */
  gc_values.font = FRAME_FONT (f);

  /* Cursor has cursor-color background, background-color foreground.  */
  gc_values.foreground = FRAME_BACKGROUND_PIXEL (f);
  gc_values.background = f->output_data.w32->cursor_pixel;
  f->output_data.w32->cursor_gc
    = XCreateGC (NULL, FRAME_W32_WINDOW (f),
                 (GCFont | GCForeground | GCBackground),
                 &gc_values);

  /* Reliefs.  */
  f->output_data.w32->white_relief.gc = 0;
  f->output_data.w32->black_relief.gc = 0;

  unblock_input ();
}


/* Handler for signals raised during x_create_frame and
   x_create_tip_frame.  FRAME is the frame which is partially
   constructed.  */

static Lisp_Object
unwind_create_frame (Lisp_Object frame)
{
  struct frame *f = XFRAME (frame);

  /* If frame is ``official'', nothing to do.  */
  if (NILP (Fmemq (frame, Vframe_list)))
    {
#ifdef GLYPH_DEBUG
      struct w32_display_info *dpyinfo = FRAME_DISPLAY_INFO (f);
#endif

      x_free_frame_resources (f);
      free_glyphs (f);

#ifdef GLYPH_DEBUG
      /* Check that reference counts are indeed correct.  */
      eassert (dpyinfo->reference_count == dpyinfo_refcount);
      eassert (dpyinfo->terminal->image_cache->refcount == image_cache_refcount);
#endif
      return Qt;
    }

  return Qnil;
}

static void
do_unwind_create_frame (Lisp_Object frame)
{
  unwind_create_frame (frame);
}

static void
x_default_font_parameter (struct frame *f, Lisp_Object parms)
{
  struct w32_display_info *dpyinfo = FRAME_DISPLAY_INFO (f);
  Lisp_Object font_param = x_get_arg (dpyinfo, parms, Qfont, NULL, NULL,
                                RES_TYPE_STRING);
  Lisp_Object font;
  if (EQ (font_param, Qunbound))
    font_param = Qnil;
  font = !NILP (font_param) ? font_param
    : x_get_arg (dpyinfo, parms, Qfont, "font", "Font", RES_TYPE_STRING);

  if (!STRINGP (font))
    {
      int i;
      static char *names[]
        = { "Courier New-10",
            "-*-Courier-normal-r-*-*-13-*-*-*-c-*-iso8859-1",
            "-*-Fixedsys-normal-r-*-*-12-*-*-*-c-*-iso8859-1",
            "Fixedsys",
            NULL };

      for (i = 0; names[i]; i++)
        {
          font = font_open_by_name (f, build_unibyte_string (names[i]));
          if (! NILP (font))
            break;
        }
      if (NILP (font))
        error ("No suitable font was found");
    }
  else if (!NILP (font_param))
    {
      /* Remember the explicit font parameter, so we can re-apply it after
         we've applied the `default' face settings.  */
      x_set_frame_parameters (f, Fcons (Fcons (Qfont_param, font_param), Qnil));
    }
  x_default_parameter (f, parms, Qfont, font, "font", "Font", RES_TYPE_STRING);
}

DEFUN ("x-create-frame", Fx_create_frame, Sx_create_frame,
       1, 1, 0,
       doc: /* Make a new window, which is called a \"frame\" in Emacs terms.
Return an Emacs frame object.
PARAMETERS is an alist of frame parameters.
If the parameters specify that the frame should not have a minibuffer,
and do not specify a specific minibuffer window to use,
then `default-minibuffer-frame' must be a frame whose minibuffer can
be shared by the new frame.

This function is an internal primitive--use `make-frame' instead.  */)
  (Lisp_Object parameters)
{
  struct frame *f;
  Lisp_Object frame, tem;
  Lisp_Object name;
  int minibuffer_only = 0;
  long window_prompting = 0;
  int width, height;
  ptrdiff_t count = SPECPDL_INDEX ();
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
  Lisp_Object display;
  struct w32_display_info *dpyinfo = NULL;
  Lisp_Object parent;
  struct kboard *kb;

  /* Make copy of frame parameters because the original is in pure
     storage now. */
  parameters = Fcopy_alist (parameters);

  /* Use this general default value to start with
     until we know if this frame has a specified name.  */
  Vx_resource_name = Vinvocation_name;

  display = x_get_arg (dpyinfo, parameters, Qterminal, 0, 0, RES_TYPE_NUMBER);
  if (EQ (display, Qunbound))
    display = x_get_arg (dpyinfo, parameters, Qdisplay, 0, 0, RES_TYPE_STRING);
  if (EQ (display, Qunbound))
    display = Qnil;
  dpyinfo = check_x_display_info (display);
  kb = dpyinfo->terminal->kboard;

  if (!dpyinfo->terminal->name)
    error ("Terminal is not live, can't create new frames on it");

  name = x_get_arg (dpyinfo, parameters, Qname, "name", "Name", RES_TYPE_STRING);
  if (!STRINGP (name)
      && ! EQ (name, Qunbound)
      && ! NILP (name))
    error ("Invalid frame name--not a string or nil");

  if (STRINGP (name))
    Vx_resource_name = name;

  /* See if parent window is specified.  */
  parent = x_get_arg (dpyinfo, parameters, Qparent_id, NULL, NULL, RES_TYPE_NUMBER);
  if (EQ (parent, Qunbound))
    parent = Qnil;
  if (! NILP (parent))
    CHECK_NUMBER (parent);

  /* make_frame_without_minibuffer can run Lisp code and garbage collect.  */
  /* No need to protect DISPLAY because that's not used after passing
     it to make_frame_without_minibuffer.  */
  frame = Qnil;
  GCPRO4 (parameters, parent, name, frame);
  tem = x_get_arg (dpyinfo, parameters, Qminibuffer, "minibuffer", "Minibuffer",
                     RES_TYPE_SYMBOL);
  if (EQ (tem, Qnone) || NILP (tem))
    f = make_frame_without_minibuffer (Qnil, kb, display);
  else if (EQ (tem, Qonly))
    {
      f = make_minibuffer_frame ();
      minibuffer_only = 1;
    }
  else if (WINDOWP (tem))
    f = make_frame_without_minibuffer (tem, kb, display);
  else
    f = make_frame (1);

  XSETFRAME (frame, f);

  /* By default, make scrollbars the system standard width. */
  FRAME_CONFIG_SCROLL_BAR_WIDTH (f) = GetSystemMetrics (SM_CXVSCROLL);

  f->terminal = dpyinfo->terminal;

  f->output_method = output_w32;
  f->output_data.w32 = xzalloc (sizeof (struct w32_output));
  FRAME_FONTSET (f) = -1;

  fset_icon_name
    (f, x_get_arg (dpyinfo, parameters, Qicon_name, "iconName", "Title",
                   RES_TYPE_STRING));
  if (! STRINGP (f->icon_name))
    fset_icon_name (f, Qnil);

/*  FRAME_DISPLAY_INFO (f) = dpyinfo; */

  /* With FRAME_DISPLAY_INFO set up, this unwind-protect is safe.  */
  record_unwind_protect (do_unwind_create_frame, frame);
#ifdef GLYPH_DEBUG
  image_cache_refcount =
    FRAME_IMAGE_CACHE (f) ? FRAME_IMAGE_CACHE (f)->refcount : 0;
  dpyinfo_refcount = dpyinfo->reference_count;
#endif /* GLYPH_DEBUG */

  /* Specify the parent under which to make this window.  */

  if (!NILP (parent))
    {
      f->output_data.w32->parent_desc = (Window) XFASTINT (parent);
      f->output_data.w32->explicit_parent = 1;
    }
  else
    {
      f->output_data.w32->parent_desc = FRAME_DISPLAY_INFO (f)->root_window;
      f->output_data.w32->explicit_parent = 0;
    }

  /* Set the name; the functions to which we pass f expect the name to
     be set.  */
  if (EQ (name, Qunbound) || NILP (name))
    {
      fset_name (f, build_string (dpyinfo->w32_id_name));
      f->explicit_name = 0;
    }
  else
    {
      fset_name (f, name);
      f->explicit_name = 1;
      /* use the frame's title when getting resources for this frame.  */
      specbind (Qx_resource_name, name);
    }

  if (uniscribe_available)
    register_font_driver (&uniscribe_font_driver, f);
  register_font_driver (&w32font_driver, f);

  x_default_parameter (f, parameters, Qfont_backend, Qnil,
                       "fontBackend", "FontBackend", RES_TYPE_STRING);
  /* Extract the window parameters from the supplied values
     that are needed to determine window geometry.  */
  x_default_font_parameter (f, parameters);
  x_default_parameter (f, parameters, Qborder_width, make_number (2),
                       "borderWidth", "BorderWidth", RES_TYPE_NUMBER);

  /* We recognize either internalBorderWidth or internalBorder
     (which is what xterm calls it).  */
  if (NILP (Fassq (Qinternal_border_width, parameters)))
    {
      Lisp_Object value;

      value = x_get_arg (dpyinfo, parameters, Qinternal_border_width,
                           "internalBorder", "InternalBorder", RES_TYPE_NUMBER);
      if (! EQ (value, Qunbound))
        parameters = Fcons (Fcons (Qinternal_border_width, value),
                            parameters);
    }
  /* Default internalBorderWidth to 0 on Windows to match other programs.  */
  x_default_parameter (f, parameters, Qinternal_border_width, make_number (0),
                       "internalBorderWidth", "InternalBorder", RES_TYPE_NUMBER);
  x_default_parameter (f, parameters, Qvertical_scroll_bars, Qright,
                       "verticalScrollBars", "ScrollBars", RES_TYPE_SYMBOL);

  /* Also do the stuff which must be set before the window exists.  */
  x_default_parameter (f, parameters, Qforeground_color, build_string ("black"),
                       "foreground", "Foreground", RES_TYPE_STRING);
  x_default_parameter (f, parameters, Qbackground_color, build_string ("white"),
                       "background", "Background", RES_TYPE_STRING);
  x_default_parameter (f, parameters, Qmouse_color, build_string ("black"),
                       "pointerColor", "Foreground", RES_TYPE_STRING);
  x_default_parameter (f, parameters, Qborder_color, build_string ("black"),
                       "borderColor", "BorderColor", RES_TYPE_STRING);
  x_default_parameter (f, parameters, Qscreen_gamma, Qnil,
                       "screenGamma", "ScreenGamma", RES_TYPE_FLOAT);
  x_default_parameter (f, parameters, Qline_spacing, Qnil,
                       "lineSpacing", "LineSpacing", RES_TYPE_NUMBER);
  x_default_parameter (f, parameters, Qleft_fringe, Qnil,
                       "leftFringe", "LeftFringe", RES_TYPE_NUMBER);
  x_default_parameter (f, parameters, Qright_fringe, Qnil,
                       "rightFringe", "RightFringe", RES_TYPE_NUMBER);

  /* Init faces before x_default_parameter is called for scroll-bar
     parameters because that function calls x_set_scroll_bar_width,
     which calls change_frame_size, which calls Fset_window_buffer,
     which runs hooks, which call Fvertical_motion.  At the end, we
     end up in init_iterator with a null face cache, which should not
     happen.  */
  init_frame_faces (f);

  /* The X resources controlling the menu-bar and tool-bar are
     processed specially at startup, and reflected in the mode
     variables; ignore them here.  */
  x_default_parameter (f, parameters, Qmenu_bar_lines,
                       NILP (Vmenu_bar_mode)
                       ? make_number (0) : make_number (1),
                       NULL, NULL, RES_TYPE_NUMBER);
  x_default_parameter (f, parameters, Qtool_bar_lines,
                       NILP (Vtool_bar_mode)
                       ? make_number (0) : make_number (1),
                       NULL, NULL, RES_TYPE_NUMBER);

  x_default_parameter (f, parameters, Qbuffer_predicate, Qnil,
                       "bufferPredicate", "BufferPredicate", RES_TYPE_SYMBOL);
  x_default_parameter (f, parameters, Qtitle, Qnil,
                       "title", "Title", RES_TYPE_STRING);
  x_default_parameter (f, parameters, Qfullscreen, Qnil,
                       "fullscreen", "Fullscreen", RES_TYPE_SYMBOL);

  f->output_data.w32->dwStyle = WS_OVERLAPPEDWINDOW;
  f->output_data.w32->parent_desc = FRAME_DISPLAY_INFO (f)->root_window;

  f->output_data.w32->text_cursor = w32_load_cursor (IDC_IBEAM);
  f->output_data.w32->nontext_cursor = w32_load_cursor (IDC_ARROW);
  f->output_data.w32->modeline_cursor = w32_load_cursor (IDC_ARROW);
  f->output_data.w32->hand_cursor = w32_load_cursor (IDC_HAND);
  f->output_data.w32->hourglass_cursor = w32_load_cursor (IDC_WAIT);
  f->output_data.w32->horizontal_drag_cursor = w32_load_cursor (IDC_SIZEWE);

  f->output_data.w32->current_cursor = f->output_data.w32->nontext_cursor;

  window_prompting = x_figure_window_size (f, parameters, 1);

  tem = x_get_arg (dpyinfo, parameters, Qunsplittable, 0, 0, RES_TYPE_BOOLEAN);
  f->no_split = minibuffer_only || EQ (tem, Qt);

  w32_window (f, window_prompting, minibuffer_only);
  x_icon (f, parameters);

  x_make_gc (f);

  /* Now consider the frame official.  */
  f->terminal->reference_count++;
  FRAME_DISPLAY_INFO (f)->reference_count++;
  Vframe_list = Fcons (frame, Vframe_list);

  /* We need to do this after creating the window, so that the
     icon-creation functions can say whose icon they're describing.  */
  x_default_parameter (f, parameters, Qicon_type, Qnil,
                       "bitmapIcon", "BitmapIcon", RES_TYPE_SYMBOL);

  x_default_parameter (f, parameters, Qauto_raise, Qnil,
                       "autoRaise", "AutoRaiseLower", RES_TYPE_BOOLEAN);
  x_default_parameter (f, parameters, Qauto_lower, Qnil,
                       "autoLower", "AutoRaiseLower", RES_TYPE_BOOLEAN);
  x_default_parameter (f, parameters, Qcursor_type, Qbox,
                       "cursorType", "CursorType", RES_TYPE_SYMBOL);
  x_default_parameter (f, parameters, Qscroll_bar_width, Qnil,
                       "scrollBarWidth", "ScrollBarWidth", RES_TYPE_NUMBER);
  x_default_parameter (f, parameters, Qalpha, Qnil,
                       "alpha", "Alpha", RES_TYPE_NUMBER);

  /* Dimensions, especially FRAME_LINES (f), must be done via change_frame_size.
     Change will not be effected unless different from the current
     FRAME_LINES (f).  */
  width = FRAME_COLS (f);
  height = FRAME_LINES (f);

  FRAME_LINES (f) = 0;
  SET_FRAME_COLS (f, 0);
  change_frame_size (f, height, width, 1, 0, 0);

  /* Tell the server what size and position, etc, we want, and how
     badly we want them.  This should be done after we have the menu
     bar so that its size can be taken into account.  */
  block_input ();
  x_wm_set_size_hint (f, window_prompting, 0);
  unblock_input ();

  /* Make the window appear on the frame and enable display, unless
     the caller says not to.  However, with explicit parent, Emacs
     cannot control visibility, so don't try.  */
  if (! f->output_data.w32->explicit_parent)
    {
      Lisp_Object visibility;

      visibility = x_get_arg (dpyinfo, parameters, Qvisibility, 0, 0, RES_TYPE_SYMBOL);
      if (EQ (visibility, Qunbound))
        visibility = Qt;

      if (EQ (visibility, Qicon))
        x_iconify_frame (f);
      else if (! NILP (visibility))
        x_make_frame_visible (f);
      else
        /* Must have been Qnil.  */
        ;
    }

  /* Initialize `default-minibuffer-frame' in case this is the first
     frame on this terminal.  */
  if (FRAME_HAS_MINIBUF_P (f)
      && (!FRAMEP (KVAR (kb, Vdefault_minibuffer_frame))
          || !FRAME_LIVE_P (XFRAME (KVAR (kb, Vdefault_minibuffer_frame)))))
    kset_default_minibuffer_frame (kb, frame);

  /* All remaining specified parameters, which have not been "used"
     by x_get_arg and friends, now go in the misc. alist of the frame.  */
  for (tem = parameters; CONSP (tem); tem = XCDR (tem))
    if (CONSP (XCAR (tem)) && !NILP (XCAR (XCAR (tem))))
      fset_param_alist (f, Fcons (XCAR (tem), f->param_alist));

  UNGCPRO;

  /* Make sure windows on this frame appear in calls to next-window
     and similar functions.  */
  Vwindow_list = Qnil;

  return unbind_to (count, frame);
}

/* FRAME is used only to get a handle on the X display.  We don't pass the
   display info directly because we're called from frame.c, which doesn't
   know about that structure.  */
Lisp_Object
x_get_focus_frame (struct frame *frame)
{
  struct w32_display_info *dpyinfo = FRAME_DISPLAY_INFO (frame);
  Lisp_Object xfocus;
  if (! dpyinfo->w32_focus_frame)
    return Qnil;

  XSETFRAME (xfocus, dpyinfo->w32_focus_frame);
  return xfocus;
}

DEFUN ("xw-color-defined-p", Fxw_color_defined_p, Sxw_color_defined_p, 1, 2, 0,
       doc: /* Internal function called by `color-defined-p', which see.
\(Note that the Nextstep version of this function ignores FRAME.)  */)
  (Lisp_Object color, Lisp_Object frame)
{
  XColor foo;
  struct frame *f = decode_window_system_frame (frame);

  CHECK_STRING (color);

  if (w32_defined_color (f, SDATA (color), &foo, 0))
    return Qt;
  else
    return Qnil;
}

DEFUN ("xw-color-values", Fxw_color_values, Sxw_color_values, 1, 2, 0,
       doc: /* Internal function called by `color-values', which see.  */)
  (Lisp_Object color, Lisp_Object frame)
{
  XColor foo;
  struct frame *f = decode_window_system_frame (frame);

  CHECK_STRING (color);

  if (w32_defined_color (f, SDATA (color), &foo, 0))
    return list3i ((GetRValue (foo.pixel) << 8) | GetRValue (foo.pixel),
                   (GetGValue (foo.pixel) << 8) | GetGValue (foo.pixel),
                   (GetBValue (foo.pixel) << 8) | GetBValue (foo.pixel));
  else
    return Qnil;
}

DEFUN ("xw-display-color-p", Fxw_display_color_p, Sxw_display_color_p, 0, 1, 0,
       doc: /* Internal function called by `display-color-p', which see.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  if ((dpyinfo->n_planes * dpyinfo->n_cbits) <= 2)
    return Qnil;

  return Qt;
}

DEFUN ("x-display-grayscale-p", Fx_display_grayscale_p,
       Sx_display_grayscale_p, 0, 1, 0,
       doc: /* Return t if DISPLAY supports shades of gray.
Note that color displays do support shades of gray.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  if ((dpyinfo->n_planes * dpyinfo->n_cbits) <= 1)
    return Qnil;

  return Qt;
}

DEFUN ("x-display-pixel-width", Fx_display_pixel_width,
       Sx_display_pixel_width, 0, 1, 0,
       doc: /* Return the width in pixels of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.

On \"multi-monitor\" setups this refers to the pixel width for all
physical monitors associated with DISPLAY.  To get information for
each physical monitor, use `display-monitor-attributes-list'.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  return make_number (x_display_pixel_width (dpyinfo));
}

DEFUN ("x-display-pixel-height", Fx_display_pixel_height,
       Sx_display_pixel_height, 0, 1, 0,
       doc: /* Return the height in pixels of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.

On \"multi-monitor\" setups this refers to the pixel height for all
physical monitors associated with DISPLAY.  To get information for
each physical monitor, use `display-monitor-attributes-list'.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  return make_number (x_display_pixel_height (dpyinfo));
}

DEFUN ("x-display-planes", Fx_display_planes, Sx_display_planes,
       0, 1, 0,
       doc: /* Return the number of bitplanes of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  return make_number (dpyinfo->n_planes * dpyinfo->n_cbits);
}

DEFUN ("x-display-color-cells", Fx_display_color_cells, Sx_display_color_cells,
       0, 1, 0,
       doc: /* Return the number of color cells of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);
  int cap;

  /* Don't use NCOLORS: it returns incorrect results under remote
   * desktop.  We force 24+ bit depths to 24-bit, both to prevent an
   * overflow and because probably is more meaningful on Windows
   * anyway.  */

  cap = 1 << min (dpyinfo->n_planes * dpyinfo->n_cbits, 24);
  return make_number (cap);
}

DEFUN ("x-server-max-request-size", Fx_server_max_request_size,
       Sx_server_max_request_size,
       0, 1, 0,
       doc: /* Return the maximum request size of the server of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return make_number (1);
}

DEFUN ("x-server-vendor", Fx_server_vendor, Sx_server_vendor, 0, 1, 0,
       doc: /* Return the "vendor ID" string of the W32 system (Microsoft).
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return build_string ("Microsoft Corp.");
}

DEFUN ("x-server-version", Fx_server_version, Sx_server_version, 0, 1, 0,
       doc: /* Return the version numbers of the server of DISPLAY.
The value is a list of three integers: the major and minor
version numbers of the X Protocol in use, and the distributor-specific
release number.  See also the function `x-server-vendor'.

The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return list3i (w32_major_version, w32_minor_version, w32_build_number);
}

DEFUN ("x-display-screens", Fx_display_screens, Sx_display_screens, 0, 1, 0,
       doc: /* Return the number of screens on the server of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return make_number (1);
}

DEFUN ("x-display-mm-height", Fx_display_mm_height,
       Sx_display_mm_height, 0, 1, 0,
       doc: /* Return the height in millimeters of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.

On \"multi-monitor\" setups this refers to the height in millimeters for
all physical monitors associated with DISPLAY.  To get information
for each physical monitor, use `display-monitor-attributes-list'.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);
  HDC hdc;
  double mm_per_pixel;

  hdc = GetDC (NULL);
  mm_per_pixel = ((double) GetDeviceCaps (hdc, VERTSIZE)
                  / GetDeviceCaps (hdc, VERTRES));
  ReleaseDC (NULL, hdc);

  return make_number (x_display_pixel_height (dpyinfo) * mm_per_pixel + 0.5);
}

DEFUN ("x-display-mm-width", Fx_display_mm_width, Sx_display_mm_width, 0, 1, 0,
       doc: /* Return the width in millimeters of DISPLAY.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.

On \"multi-monitor\" setups this refers to the width in millimeters for
all physical monitors associated with TERMINAL.  To get information
for each physical monitor, use `display-monitor-attributes-list'.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);
  HDC hdc;
  double mm_per_pixel;

  hdc = GetDC (NULL);
  mm_per_pixel = ((double) GetDeviceCaps (hdc, HORZSIZE)
                  / GetDeviceCaps (hdc, HORZRES));
  ReleaseDC (NULL, hdc);

  return make_number (x_display_pixel_width (dpyinfo) * mm_per_pixel + 0.5);
}

DEFUN ("x-display-backing-store", Fx_display_backing_store,
       Sx_display_backing_store, 0, 1, 0,
       doc: /* Return an indication of whether DISPLAY does backing store.
The value may be `always', `when-mapped', or `not-useful'.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return intern ("not-useful");
}

DEFUN ("x-display-visual-class", Fx_display_visual_class,
       Sx_display_visual_class, 0, 1, 0,
       doc: /* Return the visual class of DISPLAY.
The value is one of the symbols `static-gray', `gray-scale',
`static-color', `pseudo-color', `true-color', or `direct-color'.

The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);
  Lisp_Object result = Qnil;

  if (dpyinfo->has_palette)
      result = intern ("pseudo-color");
  else if (dpyinfo->n_planes * dpyinfo->n_cbits == 1)
      result = intern ("static-grey");
  else if (dpyinfo->n_planes * dpyinfo->n_cbits == 4)
      result = intern ("static-color");
  else if (dpyinfo->n_planes * dpyinfo->n_cbits > 8)
      result = intern ("true-color");

  return result;
}

DEFUN ("x-display-save-under", Fx_display_save_under,
       Sx_display_save_under, 0, 1, 0,
       doc: /* Return t if DISPLAY supports the save-under feature.
The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  return Qnil;
}

static BOOL CALLBACK
w32_monitor_enum (HMONITOR monitor, HDC hdc, RECT *rcMonitor, LPARAM dwData)
{
  Lisp_Object *monitor_list = (Lisp_Object *) dwData;

  *monitor_list = Fcons (make_save_ptr (monitor), *monitor_list);

  return TRUE;
}

static Lisp_Object
w32_display_monitor_attributes_list (void)
{
  Lisp_Object attributes_list = Qnil, primary_monitor_attributes = Qnil;
  Lisp_Object monitor_list = Qnil, monitor_frames, rest, frame;
  int i, n_monitors;
  HMONITOR *monitors;
  struct gcpro gcpro1, gcpro2, gcpro3;

  if (!(enum_display_monitors_fn && get_monitor_info_fn
        && monitor_from_window_fn))
    return Qnil;

  if (!enum_display_monitors_fn (NULL, NULL, w32_monitor_enum,
                                 (LPARAM) &monitor_list)
      || NILP (monitor_list))
    return Qnil;

  n_monitors = 0;
  for (rest = monitor_list; CONSP (rest); rest = XCDR (rest))
    n_monitors++;

  monitors = xmalloc (n_monitors * sizeof (*monitors));
  for (i = 0; i < n_monitors; i++)
    {
      monitors[i] = XSAVE_POINTER (XCAR (monitor_list), 0);
      monitor_list = XCDR (monitor_list);
    }

  monitor_frames = Fmake_vector (make_number (n_monitors), Qnil);
  FOR_EACH_FRAME (rest, frame)
    {
      struct frame *f = XFRAME (frame);

      if (FRAME_W32_P (f) && !EQ (frame, tip_frame))
        {
          HMONITOR monitor =
            monitor_from_window_fn (FRAME_W32_WINDOW (f),
                                    MONITOR_DEFAULT_TO_NEAREST);

          for (i = 0; i < n_monitors; i++)
            if (monitors[i] == monitor)
              break;

          if (i < n_monitors)
            ASET (monitor_frames, i, Fcons (frame, AREF (monitor_frames, i)));
        }
    }

  GCPRO3 (attributes_list, primary_monitor_attributes, monitor_frames);

  for (i = 0; i < n_monitors; i++)
    {
      Lisp_Object geometry, workarea, name, attributes = Qnil;
      HDC hdc;
      int width_mm, height_mm;
      struct MONITOR_INFO_EX mi;

      mi.cbSize = sizeof (mi);
      if (!get_monitor_info_fn (monitors[i], (struct MONITOR_INFO *) &mi))
        continue;

      hdc = CreateDCA ("DISPLAY", mi.szDevice, NULL, NULL);
      if (hdc == NULL)
        continue;
      width_mm = GetDeviceCaps (hdc, HORZSIZE);
      height_mm = GetDeviceCaps (hdc, VERTSIZE);
      DeleteDC (hdc);

      attributes = Fcons (Fcons (Qframes, AREF (monitor_frames, i)),
                          attributes);

      name = DECODE_SYSTEM (build_unibyte_string (mi.szDevice));

      attributes = Fcons (Fcons (Qname, name), attributes);

      attributes = Fcons (Fcons (Qmm_size, list2i (width_mm, height_mm)),
                          attributes);

      workarea = list4i (mi.rcWork.left, mi.rcWork.top,
                         mi.rcWork.right - mi.rcWork.left,
                         mi.rcWork.bottom - mi.rcWork.top);
      attributes = Fcons (Fcons (Qworkarea, workarea), attributes);

      geometry = list4i (mi.rcMonitor.left, mi.rcMonitor.top,
                         mi.rcMonitor.right - mi.rcMonitor.left,
                         mi.rcMonitor.bottom - mi.rcMonitor.top);
      attributes = Fcons (Fcons (Qgeometry, geometry), attributes);

      if (mi.dwFlags & MONITORINFOF_PRIMARY)
        primary_monitor_attributes = attributes;
      else
        attributes_list = Fcons (attributes, attributes_list);
    }

  if (!NILP (primary_monitor_attributes))
    attributes_list = Fcons (primary_monitor_attributes, attributes_list);

  UNGCPRO;

  xfree (monitors);

  return attributes_list;
}

static Lisp_Object
w32_display_monitor_attributes_list_fallback (struct w32_display_info *dpyinfo)
{
  Lisp_Object geometry, workarea, frames, rest, frame, attributes = Qnil;
  HDC hdc;
  double mm_per_pixel;
  int pixel_width, pixel_height, width_mm, height_mm;
  RECT workarea_rect;

  /* Fallback: treat (possibly) multiple physical monitors as if they
     formed a single monitor as a whole.  This should provide a
     consistent result at least on single monitor environments.  */
  attributes = Fcons (Fcons (Qname, build_string ("combined screen")),
                      attributes);

  frames = Qnil;
  FOR_EACH_FRAME (rest, frame)
    {
      struct frame *f = XFRAME (frame);

      if (FRAME_W32_P (f) && !EQ (frame, tip_frame))
        frames = Fcons (frame, frames);
    }
  attributes = Fcons (Fcons (Qframes, frames), attributes);

  pixel_width = x_display_pixel_width (dpyinfo);
  pixel_height = x_display_pixel_height (dpyinfo);

  hdc = GetDC (NULL);
  mm_per_pixel = ((double) GetDeviceCaps (hdc, HORZSIZE)
                  / GetDeviceCaps (hdc, HORZRES));
  width_mm = pixel_width * mm_per_pixel + 0.5;
  mm_per_pixel = ((double) GetDeviceCaps (hdc, VERTSIZE)
                  / GetDeviceCaps (hdc, VERTRES));
  height_mm = pixel_height * mm_per_pixel + 0.5;
  ReleaseDC (NULL, hdc);
  attributes = Fcons (Fcons (Qmm_size, list2i (width_mm, height_mm)),
                      attributes);

  /* GetSystemMetrics below may return 0 for Windows 95 or NT 4.0, but
     we don't care.  */
  geometry = list4i (GetSystemMetrics (SM_XVIRTUALSCREEN),
                     GetSystemMetrics (SM_YVIRTUALSCREEN),
                     pixel_width, pixel_height);
  if (SystemParametersInfo (SPI_GETWORKAREA, 0, &workarea_rect, 0))
    workarea = list4i (workarea_rect.left, workarea_rect.top,
                       workarea_rect.right - workarea_rect.left,
                       workarea_rect.bottom - workarea_rect.top);
  else
    workarea = geometry;
  attributes = Fcons (Fcons (Qworkarea, workarea), attributes);

  attributes = Fcons (Fcons (Qgeometry, geometry), attributes);

  return list1 (attributes);
}

DEFUN ("w32-display-monitor-attributes-list", Fw32_display_monitor_attributes_list,
       Sw32_display_monitor_attributes_list,
       0, 1, 0,
       doc: /* Return a list of physical monitor attributes on the W32 display DISPLAY.

The optional argument DISPLAY specifies which display to ask about.
DISPLAY should be either a frame or a display name (a string).
If omitted or nil, that stands for the selected frame's display.

Internal use only, use `display-monitor-attributes-list' instead.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);
  Lisp_Object attributes_list;

  block_input ();
  attributes_list = w32_display_monitor_attributes_list ();
  if (NILP (attributes_list))
    attributes_list = w32_display_monitor_attributes_list_fallback (dpyinfo);
  unblock_input ();

  return attributes_list;
}

DEFUN ("set-message-beep", Fset_message_beep, Sset_message_beep, 1, 1, 0,
       doc: /* Set the sound generated when the bell is rung.
SOUND is 'asterisk, 'exclamation, 'hand, 'question, 'ok, or 'silent
to use the corresponding system sound for the bell.  The 'silent sound
prevents Emacs from making any sound at all.
SOUND is nil to use the normal beep.  */)
  (Lisp_Object sound)
{
  CHECK_SYMBOL (sound);

  if (NILP (sound))
      sound_type = 0xFFFFFFFF;
  else if (EQ (sound, intern ("asterisk")))
      sound_type = MB_ICONASTERISK;
  else if (EQ (sound, intern ("exclamation")))
      sound_type = MB_ICONEXCLAMATION;
  else if (EQ (sound, intern ("hand")))
      sound_type = MB_ICONHAND;
  else if (EQ (sound, intern ("question")))
      sound_type = MB_ICONQUESTION;
  else if (EQ (sound, intern ("ok")))
      sound_type = MB_OK;
  else if (EQ (sound, intern ("silent")))
      sound_type = MB_EMACS_SILENT;
  else
      sound_type = 0xFFFFFFFF;

  return sound;
}

int
x_screen_planes (register struct frame *f)
{
  return FRAME_DISPLAY_INFO (f)->n_planes;
}
\f
/* Return the display structure for the display named NAME.
   Open a new connection if necessary.  */

struct w32_display_info *
x_display_info_for_name (Lisp_Object name)
{
  Lisp_Object names;
  struct w32_display_info *dpyinfo;

  CHECK_STRING (name);

  for (dpyinfo = &one_w32_display_info, names = w32_display_name_list;
       dpyinfo && !NILP (w32_display_name_list);
       dpyinfo = dpyinfo->next, names = XCDR (names))
    {
      Lisp_Object tem;
      tem = Fstring_equal (XCAR (XCAR (names)), name);
      if (!NILP (tem))
        return dpyinfo;
    }

  /* Use this general default value to start with.  */
  Vx_resource_name = Vinvocation_name;

  validate_x_resource_name ();

  dpyinfo = w32_term_init (name, (unsigned char *)0,
                           SSDATA (Vx_resource_name));

  if (dpyinfo == 0)
    error ("Cannot connect to server %s", SDATA (name));

  XSETFASTINT (Vwindow_system_version, w32_major_version);

  return dpyinfo;
}

DEFUN ("x-open-connection", Fx_open_connection, Sx_open_connection,
       1, 3, 0, doc: /* Open a connection to a display server.
DISPLAY is the name of the display to connect to.
Optional second arg XRM-STRING is a string of resources in xrdb format.
If the optional third arg MUST-SUCCEED is non-nil,
terminate Emacs if we can't open the connection.
\(In the Nextstep version, the last two arguments are currently ignored.)  */)
  (Lisp_Object display, Lisp_Object xrm_string, Lisp_Object must_succeed)
{
  unsigned char *xrm_option;
  struct w32_display_info *dpyinfo;

  CHECK_STRING (display);

  /* Signal an error in order to encourage correct use from callers.
   * If we ever support multiple window systems in the same Emacs,
   * we'll need callers to be precise about what window system they
   * want.  */

  if (strcmp (SSDATA (display), "w32") != 0)
    error ("The name of the display in this Emacs must be \"w32\"");

  /* If initialization has already been done, return now to avoid
     overwriting critical parts of one_w32_display_info.  */
  if (window_system_available (NULL))
    return Qnil;

  if (! NILP (xrm_string))
    CHECK_STRING (xrm_string);

  /* Allow color mapping to be defined externally; first look in user's
     HOME directory, then in Emacs etc dir for a file called rgb.txt. */
  {
    Lisp_Object color_file;
    struct gcpro gcpro1;

    color_file = build_string ("~/rgb.txt");

    GCPRO1 (color_file);

    if (NILP (Ffile_readable_p (color_file)))
      color_file =
        Fexpand_file_name (build_string ("rgb.txt"),
                           Fsymbol_value (intern ("data-directory")));

    Vw32_color_map = Fx_load_color_file (color_file);

    UNGCPRO;
  }
  if (NILP (Vw32_color_map))
    Vw32_color_map = w32_default_color_map ();

  /* Merge in system logical colors.  */
  add_system_logical_colors_to_map (&Vw32_color_map);

  if (! NILP (xrm_string))
    xrm_option = SDATA (xrm_string);
  else
    xrm_option = (unsigned char *) 0;

  /* Use this general default value to start with.  */
  /* First remove .exe suffix from invocation-name - it looks ugly. */
  {
    char basename[ MAX_PATH ], *str;

    strcpy (basename, SDATA (Vinvocation_name));
    str = strrchr (basename, '.');
    if (str) *str = 0;
    Vinvocation_name = build_string (basename);
  }
  Vx_resource_name = Vinvocation_name;

  validate_x_resource_name ();

  /* This is what opens the connection and sets x_current_display.
     This also initializes many symbols, such as those used for input.  */
  dpyinfo = w32_term_init (display, xrm_option,
                           SSDATA (Vx_resource_name));

  if (dpyinfo == 0)
    {
      if (!NILP (must_succeed))
        fatal ("Cannot connect to server %s.\n",
               SDATA (display));
      else
        error ("Cannot connect to server %s", SDATA (display));
    }

  XSETFASTINT (Vwindow_system_version, w32_major_version);
  return Qnil;
}

DEFUN ("x-close-connection", Fx_close_connection,
       Sx_close_connection, 1, 1, 0,
       doc: /* Close the connection to DISPLAY's server.
For DISPLAY, specify either a frame or a display name (a string).
If DISPLAY is nil, that stands for the selected frame's display.  */)
  (Lisp_Object display)
{
  struct w32_display_info *dpyinfo = check_x_display_info (display);

  if (dpyinfo->reference_count > 0)
    error ("Display still has frames on it");

  block_input ();
  x_destroy_all_bitmaps (dpyinfo);

  x_delete_display (dpyinfo);
  unblock_input ();

  return Qnil;
}

DEFUN ("x-display-list", Fx_display_list, Sx_display_list, 0, 0, 0,
       doc: /* Return the list of display names that Emacs has connections to.  */)
  (void)
{
  Lisp_Object tail, result;

  result = Qnil;
  for (tail = w32_display_name_list; CONSP (tail); tail = XCDR (tail))
    result = Fcons (XCAR (XCAR (tail)), result);

  return result;
}

DEFUN ("x-synchronize", Fx_synchronize, Sx_synchronize, 1, 2, 0,
       doc: /* If ON is non-nil, report X errors as soon as the erring request is made.
This function only has an effect on X Windows.  With MS Windows, it is
defined but does nothing.

If ON is nil, allow buffering of requests.
Turning on synchronization prohibits the Xlib routines from buffering
requests and seriously degrades performance, but makes debugging much
easier.
The optional second argument TERMINAL specifies which display to act on.
TERMINAL should be a terminal object, a frame or a display name (a string).
If TERMINAL is omitted or nil, that stands for the selected frame's display.  */)
  (Lisp_Object on, Lisp_Object display)
{
  return Qnil;
}


\f
/***********************************************************************
                           Window properties
 ***********************************************************************/

#if 0 /* TODO : port window properties to W32 */

DEFUN ("x-change-window-property", Fx_change_window_property,
       Sx_change_window_property, 2, 6, 0,
       doc: /* Change window property PROP to VALUE on the X window of FRAME.
PROP must be a string.  VALUE may be a string or a list of conses,
numbers and/or strings.  If an element in the list is a string, it is
converted to an atom and the value of the Atom is used.  If an element
is a cons, it is converted to a 32 bit number where the car is the 16
top bits and the cdr is the lower 16 bits.

FRAME nil or omitted means use the selected frame.
If TYPE is given and non-nil, it is the name of the type of VALUE.
If TYPE is not given or nil, the type is STRING.
FORMAT gives the size in bits of each element if VALUE is a list.
It must be one of 8, 16 or 32.
If VALUE is a string or FORMAT is nil or not given, FORMAT defaults to 8.
If OUTER-P is non-nil, the property is changed for the outer X window of
FRAME.  Default is to change on the edit X window.  */)
  (Lisp_Object prop, Lisp_Object value, Lisp_Object frame,
   Lisp_Object type, Lisp_Object format, Lisp_Object outer_p)
{
  struct frame *f = decode_window_system_frame (frame);
  Atom prop_atom;

  CHECK_STRING (prop);
  CHECK_STRING (value);

  block_input ();
  prop_atom = XInternAtom (FRAME_W32_DISPLAY (f), SDATA (prop), False);
  XChangeProperty (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f),
                   prop_atom, XA_STRING, 8, PropModeReplace,
                   SDATA (value), SCHARS (value));

  /* Make sure the property is set when we return.  */
  XFlush (FRAME_W32_DISPLAY (f));
  unblock_input ();

  return value;
}


DEFUN ("x-delete-window-property", Fx_delete_window_property,
       Sx_delete_window_property, 1, 2, 0,
       doc: /* Remove window property PROP from X window of FRAME.
FRAME nil or omitted means use the selected frame.  Value is PROP.  */)
  (Lisp_Object prop, Lisp_Object frame)
{
  struct frame *f = decode_window_system_frame (frame);
  Atom prop_atom;

  CHECK_STRING (prop);
  block_input ();
  prop_atom = XInternAtom (FRAME_W32_DISPLAY (f), SDATA (prop), False);
  XDeleteProperty (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f), prop_atom);

  /* Make sure the property is removed when we return.  */
  XFlush (FRAME_W32_DISPLAY (f));
  unblock_input ();

  return prop;
}


DEFUN ("x-window-property", Fx_window_property, Sx_window_property,
       1, 6, 0,
       doc: /* Value is the value of window property PROP on FRAME.
If FRAME is nil or omitted, use the selected frame.

On X Windows, the following optional arguments are also accepted:
If TYPE is nil or omitted, get the property as a string.
Otherwise TYPE is the name of the atom that denotes the type expected.
If SOURCE is non-nil, get the property on that window instead of from
FRAME.  The number 0 denotes the root window.
If DELETE-P is non-nil, delete the property after retrieving it.
If VECTOR-RET-P is non-nil, don't return a string but a vector of values.

On MS Windows, this function accepts but ignores those optional arguments.

Value is nil if FRAME hasn't a property with name PROP or if PROP has
no value of TYPE (always string in the MS Windows case).  */)
  (Lisp_Object prop, Lisp_Object frame, Lisp_Object type,
   Lisp_Object source, Lisp_Object delete_p, Lisp_Object vector_ret_p)
{
  struct frame *f = decode_window_system_frame (frame);
  Atom prop_atom;
  int rc;
  Lisp_Object prop_value = Qnil;
  char *tmp_data = NULL;
  Atom actual_type;
  int actual_format;
  unsigned long actual_size, bytes_remaining;

  CHECK_STRING (prop);
  block_input ();
  prop_atom = XInternAtom (FRAME_W32_DISPLAY (f), SDATA (prop), False);
  rc = XGetWindowProperty (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f),
                           prop_atom, 0, 0, False, XA_STRING,
                           &actual_type, &actual_format, &actual_size,
                           &bytes_remaining, (unsigned char **) &tmp_data);
  if (rc == Success)
    {
      int size = bytes_remaining;

      XFree (tmp_data);
      tmp_data = NULL;

      rc = XGetWindowProperty (FRAME_W32_DISPLAY (f), FRAME_W32_WINDOW (f),
                               prop_atom, 0, bytes_remaining,
                               False, XA_STRING,
                               &actual_type, &actual_format,
                               &actual_size, &bytes_remaining,
                               (unsigned char **) &tmp_data);
      if (rc == Success)
        prop_value = make_string (tmp_data, size);

      XFree (tmp_data);
    }

  unblock_input ();

  return prop_value;

  return Qnil;
}

#endif /* TODO */

\f
/***********************************************************************
                                Busy cursor
 ***********************************************************************/

void
w32_note_current_window (void)
{
  struct frame * f = SELECTED_FRAME ();

  if (!FRAME_W32_P (f))
    return;

  hourglass_hwnd = FRAME_W32_WINDOW (f);
}

void
show_hourglass (struct atimer *timer)
{
  struct frame *f;

  hourglass_atimer = NULL;

  block_input ();
  f = x_window_to_frame (&one_w32_display_info,
                                       hourglass_hwnd);

  if (f)
    f->output_data.w32->hourglass_p = 0;
  else
    f = SELECTED_FRAME ();

  if (!FRAME_W32_P (f))
    return;

  w32_show_hourglass (f);
  unblock_input ();
}

void
hide_hourglass (void)
{
  block_input ();
  w32_hide_hourglass ();
  unblock_input ();
}


/* Display an hourglass cursor.  Set the hourglass_p flag in display info
   to indicate that an hourglass cursor is shown.  */

static void
w32_show_hourglass (struct frame *f)
{
  if (!hourglass_shown_p)
    {
      f->output_data.w32->hourglass_p = 1;
      if (!menubar_in_use && !current_popup_menu)
        SetCursor (f->output_data.w32->hourglass_cursor);
      hourglass_shown_p = 1;
    }
}


/* Hide the hourglass cursor on all frames, if it is currently shown.  */

static void
w32_hide_hourglass (void)
{
  if (hourglass_shown_p)
    {
      struct frame *f = x_window_to_frame (&one_w32_display_info,
                                           hourglass_hwnd);
      if (f)
        f->output_data.w32->hourglass_p = 0;
      else
        /* If frame was deleted, restore to selected frame's cursor.  */
        f = SELECTED_FRAME ();

      if (FRAME_W32_P (f))
        SetCursor (f->output_data.w32->current_cursor);
      else
        /* No cursors on non GUI frames - restore to stock arrow cursor.  */
        SetCursor (w32_load_cursor (IDC_ARROW));

      hourglass_shown_p = 0;
    }
}


\f
/***********************************************************************
                                Tool tips
 ***********************************************************************/

static Lisp_Object x_create_tip_frame (struct w32_display_info *,
                                       Lisp_Object, Lisp_Object);
static void compute_tip_xy (struct frame *, Lisp_Object, Lisp_Object,
                            Lisp_Object, int, int, int *, int *);

/* The frame of a currently visible tooltip.  */

Lisp_Object tip_frame;

/* If non-nil, a timer started that hides the last tooltip when it
   fires.  */

Lisp_Object tip_timer;
Window tip_window;

/* If non-nil, a vector of 3 elements containing the last args
   with which x-show-tip was called.  See there.  */

Lisp_Object last_show_tip_args;


static void
unwind_create_tip_frame (Lisp_Object frame)
{
  Lisp_Object deleted;

  deleted = unwind_create_frame (frame);
  if (EQ (deleted, Qt))
    {
      tip_window = NULL;
      tip_frame = Qnil;
    }
}


/* Create a frame for a tooltip on the display described by DPYINFO.
   PARMS is a list of frame parameters.  TEXT is the string to
   display in the tip frame.  Value is the frame.

   Note that functions called here, esp. x_default_parameter can
   signal errors, for instance when a specified color name is
   undefined.  We have to make sure that we're in a consistent state
   when this happens.  */

static Lisp_Object
x_create_tip_frame (struct w32_display_info *dpyinfo,
                    Lisp_Object parms, Lisp_Object text)
{
  struct frame *f;
  Lisp_Object frame;
  Lisp_Object name;
  long window_prompting = 0;
  int width, height;
  ptrdiff_t count = SPECPDL_INDEX ();
  struct gcpro gcpro1, gcpro2, gcpro3;
  struct kboard *kb;
  int face_change_count_before = face_change_count;
  Lisp_Object buffer;
  struct buffer *old_buffer;

  /* Use this general default value to start with until we know if
     this frame has a specified name.  */
  Vx_resource_name = Vinvocation_name;

  kb = dpyinfo->terminal->kboard;

  /* The calls to x_get_arg remove elements from PARMS, so copy it to
     avoid destructive changes behind our caller's back.  */
  parms = Fcopy_alist (parms);

  /* Get the name of the frame to use for resource lookup.  */
  name = x_get_arg (dpyinfo, parms, Qname, "name", "Name", RES_TYPE_STRING);
  if (!STRINGP (name)
      && !EQ (name, Qunbound)
      && !NILP (name))
    error ("Invalid frame name--not a string or nil");
  Vx_resource_name = name;

  frame = Qnil;
  GCPRO3 (parms, name, frame);
  /* Make a frame without minibuffer nor mode-line.  */
  f = make_frame (0);
  f->wants_modeline = 0;
  XSETFRAME (frame, f);

  buffer = Fget_buffer_create (build_string (" *tip*"));
  /* Use set_window_buffer instead of Fset_window_buffer (see
     discussion of bug#11984, bug#12025, bug#12026).  */
  set_window_buffer (FRAME_ROOT_WINDOW (f), buffer, 0, 0);
  old_buffer = current_buffer;
  set_buffer_internal_1 (XBUFFER (buffer));
  bset_truncate_lines (current_buffer, Qnil);
  specbind (Qinhibit_read_only, Qt);
  specbind (Qinhibit_modification_hooks, Qt);
  Ferase_buffer ();
  Finsert (1, &text);
  set_buffer_internal_1 (old_buffer);

  record_unwind_protect (unwind_create_tip_frame, frame);

  /* By setting the output method, we're essentially saying that
     the frame is live, as per FRAME_LIVE_P.  If we get a signal
     from this point on, x_destroy_window might screw up reference
     counts etc.  */
  f->terminal = dpyinfo->terminal;
  f->output_method = output_w32;
  f->output_data.w32 = xzalloc (sizeof (struct w32_output));

  FRAME_FONTSET (f)  = -1;
  fset_icon_name (f, Qnil);

#ifdef GLYPH_DEBUG
  image_cache_refcount =
    FRAME_IMAGE_CACHE (f) ? FRAME_IMAGE_CACHE (f)->refcount : 0;
  dpyinfo_refcount = dpyinfo->reference_count;
#endif /* GLYPH_DEBUG */
  FRAME_KBOARD (f) = kb;
  f->output_data.w32->parent_desc = FRAME_DISPLAY_INFO (f)->root_window;
  f->output_data.w32->explicit_parent = 0;

  /* Set the name; the functions to which we pass f expect the name to
     be set.  */
  if (EQ (name, Qunbound) || NILP (name))
    {
      fset_name (f, build_string (dpyinfo->w32_id_name));
      f->explicit_name = 0;
    }
  else
    {
      fset_name (f, name);
      f->explicit_name = 1;
      /* use the frame's title when getting resources for this frame.  */
      specbind (Qx_resource_name, name);
    }

  if (uniscribe_available)
    register_font_driver (&uniscribe_font_driver, f);
  register_font_driver (&w32font_driver, f);

  x_default_parameter (f, parms, Qfont_backend, Qnil,
                       "fontBackend", "FontBackend", RES_TYPE_STRING);

  /* Extract the window parameters from the supplied values
     that are needed to determine window geometry.  */
  x_default_font_parameter (f, parms);

  x_default_parameter (f, parms, Qborder_width, make_number (2),
                       "borderWidth", "BorderWidth", RES_TYPE_NUMBER);
  /* This defaults to 2 in order to match xterm.  We recognize either
     internalBorderWidth or internalBorder (which is what xterm calls
     it).  */
  if (NILP (Fassq (Qinternal_border_width, parms)))
    {
      Lisp_Object value;

      value = x_get_arg (dpyinfo, parms, Qinternal_border_width,
                         "internalBorder", "internalBorder", RES_TYPE_NUMBER);
      if (! EQ (value, Qunbound))
        parms = Fcons (Fcons (Qinternal_border_width, value),
                       parms);
    }
  x_default_parameter (f, parms, Qinternal_border_width, make_number (1),
                       "internalBorderWidth", "internalBorderWidth",
                       RES_TYPE_NUMBER);

  /* Also do the stuff which must be set before the window exists.  */
  x_default_parameter (f, parms, Qforeground_color, build_string ("black"),
                       "foreground", "Foreground", RES_TYPE_STRING);
  x_default_parameter (f, parms, Qbackground_color, build_string ("white"),
                       "background", "Background", RES_TYPE_STRING);
  x_default_parameter (f, parms, Qmouse_color, build_string ("black"),
                       "pointerColor", "Foreground", RES_TYPE_STRING);
  x_default_parameter (f, parms, Qcursor_color, build_string ("black"),
                       "cursorColor", "Foreground", RES_TYPE_STRING);
  x_default_parameter (f, parms, Qborder_color, build_string ("black"),
                       "borderColor", "BorderColor", RES_TYPE_STRING);

  /* Init faces before x_default_parameter is called for scroll-bar
     parameters because that function calls x_set_scroll_bar_width,
     which calls change_frame_size, which calls Fset_window_buffer,
     which runs hooks, which call Fvertical_motion.  At the end, we
     end up in init_iterator with a null face cache, which should not
     happen.  */
  init_frame_faces (f);

  f->output_data.w32->dwStyle = WS_BORDER | WS_POPUP | WS_DISABLED;
  f->output_data.w32->parent_desc = FRAME_DISPLAY_INFO (f)->root_window;

  window_prompting = x_figure_window_size (f, parms, 0);

  /* No fringes on tip frame.  */
  f->fringe_cols = 0;
  f->left_fringe_width = 0;
  f->right_fringe_width = 0;

  block_input ();
  my_create_tip_window (f);
  unblock_input ();

  x_make_gc (f);

  x_default_parameter (f, parms, Qauto_raise, Qnil,
                       "autoRaise", "AutoRaiseLower", RES_TYPE_BOOLEAN);
  x_default_parameter (f, parms, Qauto_lower, Qnil,
                       "autoLower", "AutoRaiseLower", RES_TYPE_BOOLEAN);
  x_default_parameter (f, parms, Qcursor_type, Qbox,
                       "cursorType", "CursorType", RES_TYPE_SYMBOL);

  /* Dimensions, especially FRAME_LINES (f), must be done via change_frame_size.
     Change will not be effected unless different from the current
     FRAME_LINES (f).  */
  width = FRAME_COLS (f);
  height = FRAME_LINES (f);
  FRAME_LINES (f) = 0;
  SET_FRAME_COLS (f, 0);
  change_frame_size (f, height, width, 1, 0, 0);

  /* Add `tooltip' frame parameter's default value. */
  if (NILP (Fframe_parameter (frame, Qtooltip)))
    Fmodify_frame_parameters (frame, Fcons (Fcons (Qtooltip, Qt), Qnil));

  /* Set up faces after all frame parameters are known.  This call
     also merges in face attributes specified for new frames.

     Frame parameters may be changed if .Xdefaults contains
     specifications for the default font.  For example, if there is an
     `Emacs.default.attributeBackground: pink', the `background-color'
     attribute of the frame get's set, which let's the internal border
     of the tooltip frame appear in pink.  Prevent this.  */
  {
    Lisp_Object bg = Fframe_parameter (frame, Qbackground_color);
    Lisp_Object fg = Fframe_parameter (frame, Qforeground_color);
    Lisp_Object colors = Qnil;

    /* Set tip_frame here, so that */
    tip_frame = frame;
    call2 (Qface_set_after_frame_default, frame, Qnil);

    if (!EQ (bg, Fframe_parameter (frame, Qbackground_color)))
      colors = Fcons (Fcons (Qbackground_color, bg), colors);
    if (!EQ (fg, Fframe_parameter (frame, Qforeground_color)))
      colors = Fcons (Fcons (Qforeground_color, fg), colors);

    if (!NILP (colors))
      Fmodify_frame_parameters (frame, colors);
  }

  f->no_split = 1;

  UNGCPRO;

  /* Now that the frame is official, it counts as a reference to
     its display.  */
  FRAME_DISPLAY_INFO (f)->reference_count++;
  f->terminal->reference_count++;

  /* It is now ok to make the frame official even if we get an error
     below.  And the frame needs to be on Vframe_list or making it
     visible won't work.  */
  Vframe_list = Fcons (frame, Vframe_list);

  /* Setting attributes of faces of the tooltip frame from resources
     and similar will increment face_change_count, which leads to the
     clearing of all current matrices.  Since this isn't necessary
     here, avoid it by resetting face_change_count to the value it
     had before we created the tip frame.  */
  face_change_count = face_change_count_before;

  /* Discard the unwind_protect.  */
  return unbind_to (count, frame);
}


/* Compute where to display tip frame F.  PARMS is the list of frame
   parameters for F.  DX and DY are specified offsets from the current
   location of the mouse.  WIDTH and HEIGHT are the width and height
   of the tooltip.  Return coordinates relative to the root window of
   the display in *ROOT_X, and *ROOT_Y.  */

static void
compute_tip_xy (struct frame *f,
                Lisp_Object parms, Lisp_Object dx, Lisp_Object dy,
                int width, int height, int *root_x, int *root_y)
{
  Lisp_Object left, top;
  int min_x, min_y, max_x, max_y;

  /* User-specified position?  */
  left = Fcdr (Fassq (Qleft, parms));
  top  = Fcdr (Fassq (Qtop, parms));

  /* Move the tooltip window where the mouse pointer is.  Resize and
     show it.  */
  if (!INTEGERP (left) || !INTEGERP (top))
    {
      POINT pt;

      /* Default min and max values.  */
      min_x = 0;
      min_y = 0;
      max_x = x_display_pixel_width (FRAME_DISPLAY_INFO (f));
      max_y = x_display_pixel_height (FRAME_DISPLAY_INFO (f));

      block_input ();
      GetCursorPos (&pt);
      *root_x = pt.x;
      *root_y = pt.y;
      unblock_input ();

      /* If multiple monitor support is available, constrain the tip onto
         the current monitor. This improves the above by allowing negative
         co-ordinates if monitor positions are such that they are valid, and
         snaps a tooltip onto a single monitor if we are close to the edge
         where it would otherwise flow onto the other monitor (or into
         nothingness if there is a gap in the overlap).  */
      if (monitor_from_point_fn && get_monitor_info_fn)
        {
          struct MONITOR_INFO info;
          HMONITOR monitor
            = monitor_from_point_fn (pt, MONITOR_DEFAULT_TO_NEAREST);
          info.cbSize = sizeof (info);

          if (get_monitor_info_fn (monitor, &info))
            {
              min_x = info.rcWork.left;
              min_y = info.rcWork.top;
              max_x = info.rcWork.right;
              max_y = info.rcWork.bottom;
            }
        }
    }

  if (INTEGERP (top))
    *root_y = XINT (top);
  else if (*root_y + XINT (dy) <= min_y)
    *root_y = min_y; /* Can happen for negative dy */
  else if (*root_y + XINT (dy) + height <= max_y)
    /* It fits below the pointer */
      *root_y += XINT (dy);
  else if (height + XINT (dy) + min_y <= *root_y)
    /* It fits above the pointer.  */
    *root_y -= height + XINT (dy);
  else
    /* Put it on the top.  */
    *root_y = min_y;

  if (INTEGERP (left))
    *root_x = XINT (left);
  else if (*root_x + XINT (dx) <= min_x)
    *root_x = 0; /* Can happen for negative dx */
  else if (*root_x + XINT (dx) + width <= max_x)
    /* It fits to the right of the pointer.  */
    *root_x += XINT (dx);
  else if (width + XINT (dx) + min_x <= *root_x)
    /* It fits to the left of the pointer.  */
    *root_x -= width + XINT (dx);
  else
    /* Put it left justified on the screen -- it ought to fit that way.  */
    *root_x = min_x;
}


DEFUN ("x-show-tip", Fx_show_tip, Sx_show_tip, 1, 6, 0,
       doc: /* Show STRING in a \"tooltip\" window on frame FRAME.
A tooltip window is a small window displaying a string.

This is an internal function; Lisp code should call `tooltip-show'.

FRAME nil or omitted means use the selected frame.

PARMS is an optional list of frame parameters which can be
used to change the tooltip's appearance.

Automatically hide the tooltip after TIMEOUT seconds.  TIMEOUT nil
means use the default timeout of 5 seconds.

If the list of frame parameters PARMS contains a `left' parameter,
the tooltip is displayed at that x-position.  Otherwise it is
displayed at the mouse position, with offset DX added (default is 5 if
DX isn't specified).  Likewise for the y-position; if a `top' frame
parameter is specified, it determines the y-position of the tooltip
window, otherwise it is displayed at the mouse position, with offset
DY added (default is -10).

A tooltip's maximum size is specified by `x-max-tooltip-size'.
Text larger than the specified size is clipped.  */)
  (Lisp_Object string, Lisp_Object frame, Lisp_Object parms, Lisp_Object timeout, Lisp_Object dx, Lisp_Object dy)
{
  struct frame *f;
  struct window *w;
  int root_x, root_y;
  struct buffer *old_buffer;
  struct text_pos pos;
  int i, width, height, seen_reversed_p;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
  int old_windows_or_buffers_changed = windows_or_buffers_changed;
  ptrdiff_t count = SPECPDL_INDEX ();

  specbind (Qinhibit_redisplay, Qt);

  GCPRO4 (string, parms, frame, timeout);

  CHECK_STRING (string);
  f = decode_window_system_frame (frame);
  if (NILP (timeout))
    timeout = make_number (5);
  else
    CHECK_NATNUM (timeout);

  if (NILP (dx))
    dx = make_number (5);
  else
    CHECK_NUMBER (dx);

  if (NILP (dy))
    dy = make_number (-10);
  else
    CHECK_NUMBER (dy);

  if (NILP (last_show_tip_args))
    last_show_tip_args = Fmake_vector (make_number (3), Qnil);

  if (!NILP (tip_frame))
    {
      Lisp_Object last_string = AREF (last_show_tip_args, 0);
      Lisp_Object last_frame = AREF (last_show_tip_args, 1);
      Lisp_Object last_parms = AREF (last_show_tip_args, 2);

      if (EQ (frame, last_frame)
          && !NILP (Fequal (last_string, string))
          && !NILP (Fequal (last_parms, parms)))
        {
          struct frame *f = XFRAME (tip_frame);

          /* Only DX and DY have changed.  */
          if (!NILP (tip_timer))
            {
              Lisp_Object timer = tip_timer;
              tip_timer = Qnil;
              call1 (Qcancel_timer, timer);
            }

          block_input ();
          compute_tip_xy (f, parms, dx, dy, FRAME_PIXEL_WIDTH (f),
                          FRAME_PIXEL_HEIGHT (f), &root_x, &root_y);

          /* Put tooltip in topmost group and in position.  */
          SetWindowPos (FRAME_W32_WINDOW (f), HWND_TOPMOST,
                        root_x, root_y, 0, 0,
                        SWP_NOSIZE | SWP_NOACTIVATE);

          /* Ensure tooltip is on top of other topmost windows (eg menus).  */
          SetWindowPos (FRAME_W32_WINDOW (f), HWND_TOP,
                        0, 0, 0, 0,
                        SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

          unblock_input ();
          goto start_timer;
        }
    }

  /* Hide a previous tip, if any.  */
  Fx_hide_tip ();

  ASET (last_show_tip_args, 0, string);
  ASET (last_show_tip_args, 1, frame);
  ASET (last_show_tip_args, 2, parms);

  /* Add default values to frame parameters.  */
  if (NILP (Fassq (Qname, parms)))
    parms = Fcons (Fcons (Qname, build_string ("tooltip")), parms);
  if (NILP (Fassq (Qinternal_border_width, parms)))
    parms = Fcons (Fcons (Qinternal_border_width, make_number (3)), parms);
  if (NILP (Fassq (Qborder_width, parms)))
    parms = Fcons (Fcons (Qborder_width, make_number (1)), parms);
  if (NILP (Fassq (Qborder_color, parms)))
    parms = Fcons (Fcons (Qborder_color, build_string ("lightyellow")), parms);
  if (NILP (Fassq (Qbackground_color, parms)))
    parms = Fcons (Fcons (Qbackground_color, build_string ("lightyellow")),
                   parms);

  /* Block input until the tip has been fully drawn, to avoid crashes
     when drawing tips in menus.  */
  block_input ();

  /* Create a frame for the tooltip, and record it in the global
     variable tip_frame.  */
  frame = x_create_tip_frame (FRAME_DISPLAY_INFO (f), parms, string);
  f = XFRAME (frame);

  /* Set up the frame's root window.  */
  w = XWINDOW (FRAME_ROOT_WINDOW (f));
  w->left_col = 0;
  w->top_line = 0;

  if (CONSP (Vx_max_tooltip_size)
      && INTEGERP (XCAR (Vx_max_tooltip_size))
      && XINT (XCAR (Vx_max_tooltip_size)) > 0
      && INTEGERP (XCDR (Vx_max_tooltip_size))
      && XINT (XCDR (Vx_max_tooltip_size)) > 0)
    {
      w->total_cols = XFASTINT (XCAR (Vx_max_tooltip_size));
      w->total_lines = XFASTINT (XCDR (Vx_max_tooltip_size));
    }
  else
    {
      w->total_cols = 80;
      w->total_lines = 40;
    }

  FRAME_TOTAL_COLS (f) = WINDOW_TOTAL_COLS (w);
  adjust_frame_glyphs (f);
  w->pseudo_window_p = 1;

  /* Display the tooltip text in a temporary buffer.  */
  old_buffer = current_buffer;
  set_buffer_internal_1 (XBUFFER (XWINDOW (FRAME_ROOT_WINDOW (f))->contents));
  bset_truncate_lines (current_buffer, Qnil);
  clear_glyph_matrix (w->desired_matrix);
  clear_glyph_matrix (w->current_matrix);
  SET_TEXT_POS (pos, BEGV, BEGV_BYTE);
  try_window (FRAME_ROOT_WINDOW (f), pos, TRY_WINDOW_IGNORE_FONTS_CHANGE);

  /* Compute width and height of the tooltip.  */
  width = height = seen_reversed_p = 0;
  for (i = 0; i < w->desired_matrix->nrows; ++i)
    {
      struct glyph_row *row = &w->desired_matrix->rows[i];
      struct glyph *last;
      int row_width;

      /* Stop at the first empty row at the end.  */
      if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row))
        break;

      /* Let the row go over the full width of the frame.  */
      row->full_width_p = 1;

      row_width = row->pixel_width;
      if (row->used[TEXT_AREA])
        {
          if (!row->reversed_p)
            {
              /* There's a glyph at the end of rows that is used to
                 place the cursor there.  Don't include the width of
                 this glyph.  */
              last = &row->glyphs[TEXT_AREA][row->used[TEXT_AREA] - 1];
              if (INTEGERP (last->object))
                row_width -= last->pixel_width;
            }
          else
            {
              /* There could be a stretch glyph at the beginning of R2L
                 rows that is produced by extend_face_to_end_of_line.
                 Don't count that glyph.  */
              struct glyph *g = row->glyphs[TEXT_AREA];

              if (g->type == STRETCH_GLYPH && INTEGERP (g->object))
                {
                  row_width -= g->pixel_width;
                  seen_reversed_p = 1;
                }
            }
        }

      height += row->height;
      width = max (width, row_width);
    }

  /* If we've seen partial-length R2L rows, we need to re-adjust the
     tool-tip frame width and redisplay it again, to avoid over-wide
     tips due to the stretch glyph that extends R2L lines to full
     width of the frame.  */
  if (seen_reversed_p)
    {
      /* w->total_cols and FRAME_TOTAL_COLS want the width in columns,
         not in pixels.  */
      width /= WINDOW_FRAME_COLUMN_WIDTH (w);
      w->total_cols = width;
      FRAME_TOTAL_COLS (f) = width;
      adjust_frame_glyphs (f);
      w->pseudo_window_p = 1;
      clear_glyph_matrix (w->desired_matrix);
      clear_glyph_matrix (w->current_matrix);
      try_window (FRAME_ROOT_WINDOW (f), pos, TRY_WINDOW_IGNORE_FONTS_CHANGE);
      width = height = 0;
      /* Recompute width and height of the tooltip.  */
      for (i = 0; i < w->desired_matrix->nrows; ++i)
        {
          struct glyph_row *row = &w->desired_matrix->rows[i];
          struct glyph *last;
          int row_width;

          if (!row->enabled_p || !MATRIX_ROW_DISPLAYS_TEXT_P (row))
            break;
          row->full_width_p = 1;
          row_width = row->pixel_width;
          if (row->used[TEXT_AREA] && !row->reversed_p)
            {
              last = &row->glyphs[TEXT_AREA][row->used[TEXT_AREA] - 1];
              if (INTEGERP (last->object))
                row_width -= last->pixel_width;
            }

          height += row->height;
          width = max (width, row_width);
        }
    }

  /* Round up the height to an integral multiple of FRAME_LINE_HEIGHT.  */
  if (height % FRAME_LINE_HEIGHT (f) != 0)
    height += FRAME_LINE_HEIGHT (f) - height % FRAME_LINE_HEIGHT (f);
  /* Add the frame's internal border to the width and height the w32
     window should have.  */
  height += 2 * FRAME_INTERNAL_BORDER_WIDTH (f);
  width += 2 * FRAME_INTERNAL_BORDER_WIDTH (f);

  /* Move the tooltip window where the mouse pointer is.  Resize and
     show it.  */
  compute_tip_xy (f, parms, dx, dy, width, height, &root_x, &root_y);

  {
    /* Adjust Window size to take border into account.  */
    RECT rect;
    rect.left = rect.top = 0;
    rect.right = width;
    rect.bottom = height;
    AdjustWindowRect (&rect, f->output_data.w32->dwStyle,
                      FRAME_EXTERNAL_MENU_BAR (f));

    /* Position and size tooltip, and put it in the topmost group.
       The add-on of FRAME_COLUMN_WIDTH to the 5th argument is a
       peculiarity of w32 display: without it, some fonts cause the
       last character of the tip to be truncated or wrapped around to
       the next line.  */
    SetWindowPos (FRAME_W32_WINDOW (f), HWND_TOPMOST,
                  root_x, root_y,
                  rect.right - rect.left + FRAME_COLUMN_WIDTH (f),
                  rect.bottom - rect.top, SWP_NOACTIVATE);

    /* Ensure tooltip is on top of other topmost windows (eg menus).  */
    SetWindowPos (FRAME_W32_WINDOW (f), HWND_TOP,
                  0, 0, 0, 0,
                  SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

    /* Let redisplay know that we have made the frame visible already.  */
    SET_FRAME_VISIBLE (f, 1);

    ShowWindow (FRAME_W32_WINDOW (f), SW_SHOWNOACTIVATE);
  }

  /* Draw into the window.  */
  w->must_be_updated_p = 1;
  update_single_window (w, 1);

  unblock_input ();

  /* Restore original current buffer.  */
  set_buffer_internal_1 (old_buffer);
  windows_or_buffers_changed = old_windows_or_buffers_changed;

 start_timer:
  /* Let the tip disappear after timeout seconds.  */
  tip_timer = call3 (intern ("run-at-time"), timeout, Qnil,
                     intern ("x-hide-tip"));

  UNGCPRO;
  return unbind_to (count, Qnil);
}


DEFUN ("x-hide-tip", Fx_hide_tip, Sx_hide_tip, 0, 0, 0,
       doc: /* Hide the current tooltip window, if there is any.
Value is t if tooltip was open, nil otherwise.  */)
  (void)
{
  ptrdiff_t count;
  Lisp_Object deleted, frame, timer;
  struct gcpro gcpro1, gcpro2;

  /* Return quickly if nothing to do.  */
  if (NILP (tip_timer) && NILP (tip_frame))
    return Qnil;

  frame = tip_frame;
  timer = tip_timer;
  GCPRO2 (frame, timer);
  tip_frame = tip_timer = deleted = Qnil;

  count = SPECPDL_INDEX ();
  specbind (Qinhibit_redisplay, Qt);
  specbind (Qinhibit_quit, Qt);

  if (!NILP (timer))
    call1 (Qcancel_timer, timer);

  if (FRAMEP (frame))
    {
      delete_frame (frame, Qnil);
      deleted = Qt;
    }

  UNGCPRO;
  return unbind_to (count, deleted);
}
\f
/***********************************************************************
                        File selection dialog
 ***********************************************************************/

#define FILE_NAME_TEXT_FIELD edt1
#define FILE_NAME_COMBO_BOX cmb13
#define FILE_NAME_LIST lst1

/* Callback for altering the behavior of the Open File dialog.
   Makes the Filename text field contain "Current Directory" and be
   read-only when "Directories" is selected in the filter.  This
   allows us to work around the fact that the standard Open File
   dialog does not support directories.  */
static UINT_PTR CALLBACK
file_dialog_callback (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
  if (msg == WM_NOTIFY)
    {
#ifdef NTGUI_UNICODE
      OFNOTIFYW * notify = (OFNOTIFYW *)lParam;
#else /* !NTGUI_UNICODE */
      OFNOTIFYA * notify = (OFNOTIFYA *)lParam;
#endif /* NTGUI_UNICODE */
      /* Detect when the Filter dropdown is changed.  */
      if (notify->hdr.code == CDN_TYPECHANGE
          || notify->hdr.code == CDN_INITDONE)
        {
          HWND dialog = GetParent (hwnd);
          HWND edit_control = GetDlgItem (dialog, FILE_NAME_TEXT_FIELD);
          HWND list = GetDlgItem (dialog, FILE_NAME_LIST);

          /* At least on Windows 7, the above attempt to get the window handle
             to the File Name Text Field fails.  The following code does the
             job though.  Note that this code is based on my examination of the
             window hierarchy using Microsoft Spy++.  bk */
          if (edit_control == NULL)
            {
              HWND tmp = GetDlgItem (dialog, FILE_NAME_COMBO_BOX);
              if (tmp)
                {
                  tmp = GetWindow (tmp, GW_CHILD);
                  if (tmp)
                    edit_control = GetWindow (tmp, GW_CHILD);
                }
            }

          /* Directories is in index 2.  */
          if (notify->lpOFN->nFilterIndex == 2)
            {
              CommDlg_OpenSave_SetControlText (dialog, FILE_NAME_TEXT_FIELD,
                                               GUISTR ("Current Directory"));
              EnableWindow (edit_control, FALSE);
              /* Note that at least on Windows 7, the above call to EnableWindow
                 disables the window that would ordinarily have focus.  If we
                 do not set focus to some other window here, focus will land in
                 no man's land and the user will be unable to tab through the
                 dialog box (pressing tab will only result in a beep).
                 Avoid that problem by setting focus to the list here.  */
              if (notify->hdr.code == CDN_INITDONE)
                SetFocus (list);
            }
          else
            {
              /* Don't override default filename on init done.  */
              if (notify->hdr.code == CDN_TYPECHANGE)
                CommDlg_OpenSave_SetControlText (dialog,
                                                 FILE_NAME_TEXT_FIELD,
                                                 GUISTR (""));
              EnableWindow (edit_control, TRUE);
            }
        }
    }
  return 0;
}

DEFUN ("x-file-dialog", Fx_file_dialog, Sx_file_dialog, 2, 5, 0,
       doc: /* Read file name, prompting with PROMPT in directory DIR.
Use a file selection dialog.  Select DEFAULT-FILENAME in the dialog's file
selection box, if specified.  If MUSTMATCH is non-nil, the returned file
or directory must exist.

This function is only defined on NS, MS Windows, and X Windows with the
Motif or Gtk toolkits.  With the Motif toolkit, ONLY-DIR-P is ignored.
Otherwise, if ONLY-DIR-P is non-nil, the user can only select directories.  */)
  (Lisp_Object prompt, Lisp_Object dir, Lisp_Object default_filename, Lisp_Object mustmatch, Lisp_Object only_dir_p)
{
  /* Filter index: 1: All Files, 2: Directories only  */
  static const guichar_t filter[] =
    GUISTR ("All Files (*.*)\0*.*\0Directories\0*|*\0");

  Lisp_Object filename = default_filename;
  struct frame *f = SELECTED_FRAME ();
  BOOL file_opened = FALSE;
  Lisp_Object orig_dir = dir;
  Lisp_Object orig_prompt = prompt;

  /* If we compile with _WIN32_WINNT set to 0x0400 (for NT4
     compatibility) we end up with the old file dialogs. Define a big
     enough struct for the new dialog to trick GetOpenFileName into
     giving us the new dialogs on newer versions of Windows.  */
  struct {
#ifdef NTGUI_UNICODE
    OPENFILENAMEW details;
#else /* !NTGUI_UNICODE */
    OPENFILENAMEA details;
#endif /* NTGUI_UNICODE */

#if _WIN32_WINNT < 0x500 /* < win2k */
      PVOID pvReserved;
      DWORD dwReserved;
      DWORD FlagsEx;
#endif /* < win2k */
  } new_file_details;

#ifdef NTGUI_UNICODE
  wchar_t filename_buf[32*1024 + 1]; // NT kernel maximum
  OPENFILENAMEW * file_details = &new_file_details.details;
#else /* not NTGUI_UNICODE */
  char filename_buf[MAX_PATH + 1];
  OPENFILENAMEA * file_details = &new_file_details.details;
#endif /* NTGUI_UNICODE */

  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5, gcpro6;
  GCPRO6 (prompt, dir, default_filename, mustmatch, only_dir_p, filename);

  {
    struct gcpro gcpro1, gcpro2;
    GCPRO2 (orig_dir, orig_prompt); /* There is no GCPRON, N>6.  */

    /* Note: under NTGUI_UNICODE, we do _NOT_ use ENCODE_FILE: the
       system file encoding expected by the platform APIs (e.g. Cygwin's
       POSIX implementation) may not be the same as the encoding expected
       by the Windows "ANSI" APIs!  */

    CHECK_STRING (prompt);
    CHECK_STRING (dir);

    dir = Fexpand_file_name (dir, Qnil);

    if (STRINGP (filename))
      filename = Ffile_name_nondirectory (filename);
    else
      filename = empty_unibyte_string;

#ifdef CYGWIN
    dir = Fcygwin_convert_file_name_to_windows (dir, Qt);
    if (SCHARS (filename) > 0)
      filename = Fcygwin_convert_file_name_to_windows (filename, Qnil);
#endif

    CHECK_STRING (dir);
    CHECK_STRING (filename);

    /* The code in file_dialog_callback that attempts to set the text
       of the file name edit window when handling the CDN_INITDONE
       WM_NOTIFY message does not work.  Setting filename to "Current
       Directory" in the only_dir_p case here does work however.  */
    if (SCHARS (filename) == 0 && ! NILP (only_dir_p))
      filename = build_string ("Current Directory");

    /* Convert the values we've computed so far to system form.  */
#ifdef NTGUI_UNICODE
    to_unicode (prompt, &prompt);
    to_unicode (dir, &dir);
    to_unicode (filename, &filename);
#else /* !NTGUI_UNICODE */
    prompt = ENCODE_FILE (prompt);
    dir = ENCODE_FILE (dir);
    filename = ENCODE_FILE (filename);

    /* We modify these in-place, so make copies for safety.  */
    dir = Fcopy_sequence (dir);
    unixtodos_filename (SDATA (dir));
    filename = Fcopy_sequence (filename);
    unixtodos_filename (SDATA (filename));
#endif /* NTGUI_UNICODE */

    /* Fill in the structure for the call to GetOpenFileName below.
       For NTGUI_UNICODE builds (which run only on NT), we just use
       the actual size of the structure.  For non-NTGUI_UNICODE
       builds, we tell the OS we're using an old version of the
       structure if the OS isn't new enough to support the newer
       version.  */
    memset (&new_file_details, 0, sizeof (new_file_details));

    if (w32_major_version > 4 && w32_major_version < 95)
      file_details->lStructSize = sizeof (new_file_details);
    else
      file_details->lStructSize = sizeof (*file_details);

    /* Set up the inout parameter for the selected file name.  */
    if (SBYTES (filename) + 1 > sizeof (filename_buf))
      report_file_error ("filename too long", default_filename);

    memcpy (filename_buf, SDATA (filename), SBYTES (filename) + 1);
    file_details->lpstrFile = filename_buf;
    file_details->nMaxFile = sizeof (filename_buf) / sizeof (*filename_buf);

    file_details->hwndOwner = FRAME_W32_WINDOW (f);
    /* Undocumented Bug in Common File Dialog:
       If a filter is not specified, shell links are not resolved.  */
    file_details->lpstrFilter = filter;
    file_details->lpstrInitialDir = (guichar_t*) SDATA (dir);
    file_details->lpstrTitle = (guichar_t*) SDATA (prompt);
    file_details->nFilterIndex = NILP (only_dir_p) ? 1 : 2;
    file_details->Flags = (OFN_HIDEREADONLY | OFN_NOCHANGEDIR
                           | OFN_EXPLORER | OFN_ENABLEHOOK);

    if (!NILP (mustmatch))
      {
        /* Require that the path to the parent directory exists.  */
        file_details->Flags |= OFN_PATHMUSTEXIST;
        /* If we are looking for a file, require that it exists.  */
        if (NILP (only_dir_p))
          file_details->Flags |= OFN_FILEMUSTEXIST;
      }

    {
      int count = SPECPDL_INDEX ();
      /* Prevent redisplay.  */
      specbind (Qinhibit_redisplay, Qt);
      block_input ();
      file_details->lpfnHook = file_dialog_callback;

      file_opened = GUI_FN (GetOpenFileName) (file_details);
      unblock_input ();
      unbind_to (count, Qnil);
    }

    if (file_opened)
      {
        /* Get an Emacs string from the value Windows gave us.  */
#ifdef NTGUI_UNICODE
        filename = from_unicode_buffer (filename_buf);
#else /* !NTGUI_UNICODE */
        dostounix_filename (filename_buf, 0);
        filename = DECODE_FILE (build_string (filename_buf));
#endif /* NTGUI_UNICODE */

#ifdef CYGWIN
        filename = Fcygwin_convert_file_name_from_windows (filename, Qt);
#endif /* CYGWIN */

        /* Strip the dummy filename off the end of the string if we
           added it to select a directory.  */
        if (file_details->nFilterIndex == 2)
          {
            filename = Ffile_name_directory (filename);
          }
      }
    /* User canceled the dialog without making a selection.  */
    else if (!CommDlgExtendedError ())
      filename = Qnil;
    /* An error occurred, fallback on reading from the mini-buffer.  */
    else
      filename = Fcompleting_read (
        orig_prompt,
        intern ("read-file-name-internal"),
        orig_dir,
        mustmatch,
        orig_dir,
        Qfile_name_history,
        default_filename,
        Qnil);

    UNGCPRO;
  }

  /* Make "Cancel" equivalent to C-g.  */
  if (NILP (filename))
    Fsignal (Qquit, Qnil);

  RETURN_UNGCPRO (filename);
}

\f
#ifdef WINDOWSNT
/* Moving files to the system recycle bin.
   Used by `move-file-to-trash' instead of the default moving to ~/.Trash  */
DEFUN ("system-move-file-to-trash", Fsystem_move_file_to_trash,
       Ssystem_move_file_to_trash, 1, 1, 0,
       doc: /* Move file or directory named FILENAME to the recycle bin.  */)
  (Lisp_Object filename)
{
  Lisp_Object handler;
  Lisp_Object encoded_file;
  Lisp_Object operation;

  operation = Qdelete_file;
  if (!NILP (Ffile_directory_p (filename))
      && NILP (Ffile_symlink_p (filename)))
    {
      operation = intern ("delete-directory");
      filename = Fdirectory_file_name (filename);
    }
  filename = Fexpand_file_name (filename, Qnil);

  handler = Ffind_file_name_handler (filename, operation);
  if (!NILP (handler))
    return call2 (handler, operation, filename);

  encoded_file = ENCODE_FILE (filename);

  {
    const char * path;
    SHFILEOPSTRUCT file_op;
    char tmp_path[MAX_PATH + 1];

    path = map_w32_filename (SDATA (encoded_file), NULL);

    /* On Windows, write permission is required to delete/move files.  */
    _chmod (path, 0666);

    memset (tmp_path, 0, sizeof (tmp_path));
    strcpy (tmp_path, path);

    memset (&file_op, 0, sizeof (file_op));
    file_op.hwnd = HWND_DESKTOP;
    file_op.wFunc = FO_DELETE;
    file_op.pFrom = tmp_path;
    file_op.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_ALLOWUNDO
      | FOF_NOERRORUI | FOF_NO_CONNECTED_ELEMENTS;
    file_op.fAnyOperationsAborted = FALSE;

    if (SHFileOperation (&file_op) != 0)
      report_file_error ("Removing old name", list1 (filename));
  }
  return Qnil;
}

#endif /* WINDOWSNT */

\f
/***********************************************************************
                         w32 specialized functions
 ***********************************************************************/

DEFUN ("w32-send-sys-command", Fw32_send_sys_command,
       Sw32_send_sys_command, 1, 2, 0,
       doc: /* Send frame a Windows WM_SYSCOMMAND message of type COMMAND.
Some useful values for COMMAND are #xf030 to maximize frame (#xf020
to minimize), #xf120 to restore frame to original size, and #xf100
to activate the menubar for keyboard access.  #xf140 activates the
screen saver if defined.

If optional parameter FRAME is not specified, use selected frame.  */)
  (Lisp_Object command, Lisp_Object frame)
{
  struct frame *f = decode_window_system_frame (frame);

  CHECK_NUMBER (command);

  PostMessage (FRAME_W32_WINDOW (f), WM_SYSCOMMAND, XINT (command), 0);

  return Qnil;
}

DEFUN ("w32-shell-execute", Fw32_shell_execute, Sw32_shell_execute, 2, 4, 0,
       doc: /* Get Windows to perform OPERATION on DOCUMENT.
This is a wrapper around the ShellExecute system function, which
invokes the application registered to handle OPERATION for DOCUMENT.

OPERATION is either nil or a string that names a supported operation.
What operations can be used depends on the particular DOCUMENT and its
handler application, but typically it is one of the following common
operations:

 \"open\"    - open DOCUMENT, which could be a file, a directory, or an
               executable program.  If it is an application, that
               application is launched in the current buffer's default
               directory.  Otherwise, the application associated with
               DOCUMENT is launched in the buffer's default directory.
 \"print\"   - print DOCUMENT, which must be a file
 \"explore\" - start the Windows Explorer on DOCUMENT
 \"edit\"    - launch an editor and open DOCUMENT for editing; which
               editor is launched depends on the association for the
               specified DOCUMENT
 \"find\"    - initiate search starting from DOCUMENT which must specify
               a directory
 nil       - invoke the default OPERATION, or \"open\" if default is
               not defined or unavailable

DOCUMENT is typically the name of a document file or a URL, but can
also be a program executable to run, or a directory to open in the
Windows Explorer.

If DOCUMENT is a program executable, the optional third arg PARAMETERS
can be a string containing command line parameters that will be passed
to the program; otherwise, PARAMETERS should be nil or unspecified.

Optional fourth argument SHOW-FLAG can be used to control how the
application will be displayed when it is invoked.  If SHOW-FLAG is nil
or unspecified, the application is displayed normally, otherwise it is
an integer representing a ShowWindow flag:

  0 - start hidden
  1 - start normally
  3 - start maximized
  6 - start minimized  */)
  (Lisp_Object operation, Lisp_Object document, Lisp_Object parameters, Lisp_Object show_flag)
{
  Lisp_Object current_dir;
  char *errstr;

  CHECK_STRING (document);

  /* Encode filename, current directory and parameters.  */
  current_dir = BVAR (current_buffer, directory);

#ifdef CYGWIN
  current_dir = Fcygwin_convert_file_name_to_windows (current_dir, Qt);
  if (STRINGP (document))
    document = Fcygwin_convert_file_name_to_windows (document, Qt);
#endif /* CYGWIN */

  current_dir = GUI_ENCODE_FILE (current_dir);
  if (STRINGP (document))
    document = GUI_ENCODE_FILE (document);
  if (STRINGP (parameters))
    parameters = GUI_ENCODE_SYSTEM (parameters);

  if ((int) GUI_FN (ShellExecute) (NULL,
                                   (STRINGP (operation) ?
                                    GUI_SDATA (operation) : NULL),
                                   GUI_SDATA (document),
                                   (STRINGP (parameters) ?
                                    GUI_SDATA (parameters) : NULL),
                                   GUI_SDATA (current_dir),
                                   (INTEGERP (show_flag) ?
                                    XINT (show_flag) : SW_SHOWDEFAULT))
      > 32)
    return Qt;
  errstr = w32_strerror (0);
  /* The error string might be encoded in the locale's encoding.  */
  if (!NILP (Vlocale_coding_system))
    {
      Lisp_Object decoded =
        code_convert_string_norecord (build_unibyte_string (errstr),
                                      Vlocale_coding_system, 0);
      errstr = SSDATA (decoded);
    }
  error ("ShellExecute failed: %s", errstr);
}

/* Lookup virtual keycode from string representing the name of a
   non-ascii keystroke into the corresponding virtual key, using
   lispy_function_keys.  */
static int
lookup_vk_code (char *key)
{
  int i;

  for (i = 0; i < 256; i++)
    if (lispy_function_keys[i]
        && strcmp (lispy_function_keys[i], key) == 0)
      return i;

  return -1;
}

/* Convert a one-element vector style key sequence to a hot key
   definition.  */
static Lisp_Object
w32_parse_hot_key (Lisp_Object key)
{
  /* Copied from Fdefine_key and store_in_keymap.  */
  register Lisp_Object c;
  int vk_code;
  int lisp_modifiers;
  int w32_modifiers;
  struct gcpro gcpro1;

  CHECK_VECTOR (key);

  if (ASIZE (key) != 1)
    return Qnil;

  GCPRO1 (key);

  c = AREF (key, 0);

  if (CONSP (c) && lucid_event_type_list_p (c))
    c = Fevent_convert_list (c);

  UNGCPRO;

  if (! INTEGERP (c) && ! SYMBOLP (c))
    error ("Key definition is invalid");

  /* Work out the base key and the modifiers.  */
  if (SYMBOLP (c))
    {
      c = parse_modifiers (c);
      lisp_modifiers = XINT (Fcar (Fcdr (c)));
      c = Fcar (c);
      if (!SYMBOLP (c))
        emacs_abort ();
      vk_code = lookup_vk_code (SDATA (SYMBOL_NAME (c)));
    }
  else if (INTEGERP (c))
    {
      lisp_modifiers = XINT (c) & ~CHARACTERBITS;
      /* Many ascii characters are their own virtual key code.  */
      vk_code = XINT (c) & CHARACTERBITS;
    }

  if (vk_code < 0 || vk_code > 255)
    return Qnil;

  if ((lisp_modifiers & meta_modifier) != 0
      && !NILP (Vw32_alt_is_meta))
    lisp_modifiers |= alt_modifier;

  /* Supply defs missing from mingw32.  */
#ifndef MOD_ALT
#define MOD_ALT         0x0001
#define MOD_CONTROL     0x0002
#define MOD_SHIFT       0x0004
#define MOD_WIN         0x0008
#endif

  /* Convert lisp modifiers to Windows hot-key form.  */
  w32_modifiers  = (lisp_modifiers & hyper_modifier)    ? MOD_WIN : 0;
  w32_modifiers |= (lisp_modifiers & alt_modifier)      ? MOD_ALT : 0;
  w32_modifiers |= (lisp_modifiers & ctrl_modifier)     ? MOD_CONTROL : 0;
  w32_modifiers |= (lisp_modifiers & shift_modifier)    ? MOD_SHIFT : 0;

  return HOTKEY (vk_code, w32_modifiers);
}

DEFUN ("w32-register-hot-key", Fw32_register_hot_key,
       Sw32_register_hot_key, 1, 1, 0,
       doc: /* Register KEY as a hot-key combination.
Certain key combinations like Alt-Tab are reserved for system use on
Windows, and therefore are normally intercepted by the system.  However,
most of these key combinations can be received by registering them as
hot-keys, overriding their special meaning.

KEY must be a one element key definition in vector form that would be
acceptable to `define-key' (e.g. [A-tab] for Alt-Tab).  The meta
modifier is interpreted as Alt if `w32-alt-is-meta' is t, and hyper
is always interpreted as the Windows modifier keys.

The return value is the hotkey-id if registered, otherwise nil.  */)
  (Lisp_Object key)
{
  key = w32_parse_hot_key (key);

  if (!NILP (key) && NILP (Fmemq (key, w32_grabbed_keys)))
    {
      /* Reuse an empty slot if possible.  */
      Lisp_Object item = Fmemq (Qnil, w32_grabbed_keys);

      /* Safe to add new key to list, even if we have focus.  */
      if (NILP (item))
        w32_grabbed_keys = Fcons (key, w32_grabbed_keys);
      else
        XSETCAR (item, key);

      /* Notify input thread about new hot-key definition, so that it
         takes effect without needing to switch focus.  */
      PostThreadMessage (dwWindowsThreadId, WM_EMACS_REGISTER_HOT_KEY,
                         (WPARAM) XLI (key), 0);
    }

  return key;
}

DEFUN ("w32-unregister-hot-key", Fw32_unregister_hot_key,
       Sw32_unregister_hot_key, 1, 1, 0,
       doc: /* Unregister KEY as a hot-key combination.  */)
  (Lisp_Object key)
{
  Lisp_Object item;

  if (!INTEGERP (key))
    key = w32_parse_hot_key (key);

  item = Fmemq (key, w32_grabbed_keys);

  if (!NILP (item))
    {
      /* Notify input thread about hot-key definition being removed, so
         that it takes effect without needing focus switch.  */
      if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_UNREGISTER_HOT_KEY,
                             (WPARAM) XINT (XCAR (item)), (LPARAM) XLI (item)))
        {
          MSG msg;
          GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE);
        }
      return Qt;
    }
  return Qnil;
}

DEFUN ("w32-registered-hot-keys", Fw32_registered_hot_keys,
       Sw32_registered_hot_keys, 0, 0, 0,
       doc: /* Return list of registered hot-key IDs.  */)
  (void)
{
  return Fdelq (Qnil, Fcopy_sequence (w32_grabbed_keys));
}

DEFUN ("w32-reconstruct-hot-key", Fw32_reconstruct_hot_key,
       Sw32_reconstruct_hot_key, 1, 1, 0,
       doc: /* Convert hot-key ID to a lisp key combination.
usage: (w32-reconstruct-hot-key ID)  */)
  (Lisp_Object hotkeyid)
{
  int vk_code, w32_modifiers;
  Lisp_Object key;

  CHECK_NUMBER (hotkeyid);

  vk_code = HOTKEY_VK_CODE (hotkeyid);
  w32_modifiers = HOTKEY_MODIFIERS (hotkeyid);

  if (vk_code < 256 && lispy_function_keys[vk_code])
    key = intern (lispy_function_keys[vk_code]);
  else
    key = make_number (vk_code);

  key = Fcons (key, Qnil);
  if (w32_modifiers & MOD_SHIFT)
    key = Fcons (Qshift, key);
  if (w32_modifiers & MOD_CONTROL)
    key = Fcons (Qctrl, key);
  if (w32_modifiers & MOD_ALT)
    key = Fcons (NILP (Vw32_alt_is_meta) ? Qalt : Qmeta, key);
  if (w32_modifiers & MOD_WIN)
    key = Fcons (Qhyper, key);

  return key;
}

DEFUN ("w32-toggle-lock-key", Fw32_toggle_lock_key,
       Sw32_toggle_lock_key, 1, 2, 0,
       doc: /* Toggle the state of the lock key KEY.
KEY can be `capslock', `kp-numlock', or `scroll'.
If the optional parameter NEW-STATE is a number, then the state of KEY
is set to off if the low bit of NEW-STATE is zero, otherwise on.  */)
  (Lisp_Object key, Lisp_Object new_state)
{
  int vk_code;

  if (EQ (key, intern ("capslock")))
    vk_code = VK_CAPITAL;
  else if (EQ (key, intern ("kp-numlock")))
    vk_code = VK_NUMLOCK;
  else if (EQ (key, intern ("scroll")))
    vk_code = VK_SCROLL;
  else
    return Qnil;

  if (!dwWindowsThreadId)
    return make_number (w32_console_toggle_lock_key (vk_code, new_state));

  if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_TOGGLE_LOCK_KEY,
                         (WPARAM) vk_code, (LPARAM) XLI (new_state)))
    {
      MSG msg;
      GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE);
      return make_number (msg.wParam);
    }
  return Qnil;
}

DEFUN ("w32-window-exists-p", Fw32_window_exists_p, Sw32_window_exists_p,
       2, 2, 0,
       doc: /* Return non-nil if a window exists with the specified CLASS and NAME.

This is a direct interface to the Windows API FindWindow function.  */)
  (Lisp_Object class, Lisp_Object name)
{
  HWND hnd;

  if (!NILP (class))
    CHECK_STRING (class);
  if (!NILP (name))
    CHECK_STRING (name);

  hnd = FindWindow (STRINGP (class) ? ((LPCTSTR) SDATA (class)) : NULL,
                    STRINGP (name)  ? ((LPCTSTR) SDATA (name))  : NULL);
  if (!hnd)
    return Qnil;
  return Qt;
}

DEFUN ("w32-battery-status", Fw32_battery_status, Sw32_battery_status, 0, 0, 0,
       doc: /* Get power status information from Windows system.

The following %-sequences are provided:
%L AC line status (verbose)
%B Battery status (verbose)
%b Battery status, empty means high, `-' means low,
   `!' means critical, and `+' means charging
%p Battery load percentage
%s Remaining time (to charge or discharge) in seconds
%m Remaining time (to charge or discharge) in minutes
%h Remaining time (to charge or discharge) in hours
%t Remaining time (to charge or discharge) in the form `h:min'  */)
  (void)
{
  Lisp_Object status = Qnil;

  SYSTEM_POWER_STATUS system_status;
  if (GetSystemPowerStatus (&system_status))
    {
      Lisp_Object line_status, battery_status, battery_status_symbol;
      Lisp_Object load_percentage, seconds, minutes, hours, remain;

      long seconds_left = (long) system_status.BatteryLifeTime;

      if (system_status.ACLineStatus == 0)
        line_status = build_string ("off-line");
      else if (system_status.ACLineStatus == 1)
        line_status = build_string ("on-line");
      else
        line_status = build_string ("N/A");

      if (system_status.BatteryFlag & 128)
        {
          battery_status = build_string ("N/A");
          battery_status_symbol = empty_unibyte_string;
        }
      else if (system_status.BatteryFlag & 8)
        {
          battery_status = build_string ("charging");
          battery_status_symbol = build_string ("+");
          if (system_status.BatteryFullLifeTime != -1L)
            seconds_left = system_status.BatteryFullLifeTime - seconds_left;
        }
      else if (system_status.BatteryFlag & 4)
        {
          battery_status = build_string ("critical");
          battery_status_symbol = build_string ("!");
        }
      else if (system_status.BatteryFlag & 2)
        {
          battery_status = build_string ("low");
          battery_status_symbol = build_string ("-");
        }
      else if (system_status.BatteryFlag & 1)
        {
          battery_status = build_string ("high");
          battery_status_symbol = empty_unibyte_string;
        }
      else
        {
          battery_status = build_string ("medium");
          battery_status_symbol = empty_unibyte_string;
        }

      if (system_status.BatteryLifePercent > 100)
        load_percentage = build_string ("N/A");
      else
        {
          char buffer[16];
          snprintf (buffer, 16, "%d", system_status.BatteryLifePercent);
          load_percentage = build_string (buffer);
        }

      if (seconds_left < 0)
        seconds = minutes = hours = remain = build_string ("N/A");
      else
        {
          long m;
          float h;
          char buffer[16];
          snprintf (buffer, 16, "%ld", seconds_left);
          seconds = build_string (buffer);

          m = seconds_left / 60;
          snprintf (buffer, 16, "%ld", m);
          minutes = build_string (buffer);

          h = seconds_left / 3600.0;
          snprintf (buffer, 16, "%3.1f", h);
          hours = build_string (buffer);

          snprintf (buffer, 16, "%ld:%02ld", m / 60, m % 60);
          remain = build_string (buffer);
        }

      status = listn (CONSTYPE_HEAP, 8,
                      Fcons (make_number ('L'), line_status),
                      Fcons (make_number ('B'), battery_status),
                      Fcons (make_number ('b'), battery_status_symbol),
                      Fcons (make_number ('p'), load_percentage),
                      Fcons (make_number ('s'), seconds),
                      Fcons (make_number ('m'), minutes),
                      Fcons (make_number ('h'), hours),
                      Fcons (make_number ('t'), remain));
    }
  return status;
}

\f
#ifdef WINDOWSNT
DEFUN ("file-system-info", Ffile_system_info, Sfile_system_info, 1, 1, 0,
       doc: /* Return storage information about the file system FILENAME is on.
Value is a list of floats (TOTAL FREE AVAIL), where TOTAL is the total
storage of the file system, FREE is the free storage, and AVAIL is the
storage available to a non-superuser.  All 3 numbers are in bytes.
If the underlying system call fails, value is nil.  */)
  (Lisp_Object filename)
{
  Lisp_Object encoded, value;

  CHECK_STRING (filename);
  filename = Fexpand_file_name (filename, Qnil);
  encoded = ENCODE_FILE (filename);

  value = Qnil;

  /* Determining the required information on Windows turns out, sadly,
     to be more involved than one would hope.  The original Windows API
     call for this will return bogus information on some systems, but we
     must dynamically probe for the replacement api, since that was
     added rather late on.  */
  {
    HMODULE hKernel = GetModuleHandle ("kernel32");
    BOOL (*pfn_GetDiskFreeSpaceEx)
      (char *, PULARGE_INTEGER, PULARGE_INTEGER, PULARGE_INTEGER)
      = (void *) GetProcAddress (hKernel, "GetDiskFreeSpaceEx");

    /* On Windows, we may need to specify the root directory of the
       volume holding FILENAME.  */
    char rootname[MAX_PATH];
    char *name = SDATA (encoded);

    /* find the root name of the volume if given */
    if (isalpha (name[0]) && name[1] == ':')
      {
        rootname[0] = name[0];
        rootname[1] = name[1];
        rootname[2] = '\\';
        rootname[3] = 0;
      }
    else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
      {
        char *str = rootname;
        int slashes = 4;
        do
          {
            if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
              break;
            *str++ = *name++;
          }
        while ( *name );

        *str++ = '\\';
        *str = 0;
      }

    if (pfn_GetDiskFreeSpaceEx)
      {
        /* Unsigned large integers cannot be cast to double, so
           use signed ones instead.  */
        LARGE_INTEGER availbytes;
        LARGE_INTEGER freebytes;
        LARGE_INTEGER totalbytes;

        if (pfn_GetDiskFreeSpaceEx (rootname,
                                    (ULARGE_INTEGER *)&availbytes,
                                    (ULARGE_INTEGER *)&totalbytes,
                                    (ULARGE_INTEGER *)&freebytes))
          value = list3 (make_float ((double) totalbytes.QuadPart),
                         make_float ((double) freebytes.QuadPart),
                         make_float ((double) availbytes.QuadPart));
      }
    else
      {
        DWORD sectors_per_cluster;
        DWORD bytes_per_sector;
        DWORD free_clusters;
        DWORD total_clusters;

        if (GetDiskFreeSpace (rootname,
                              &sectors_per_cluster,
                              &bytes_per_sector,
                              &free_clusters,
                              &total_clusters))
          value = list3 (make_float ((double) total_clusters
                                     * sectors_per_cluster * bytes_per_sector),
                         make_float ((double) free_clusters
                                     * sectors_per_cluster * bytes_per_sector),
                         make_float ((double) free_clusters
                                     * sectors_per_cluster * bytes_per_sector));
      }
  }

  return value;
}
#endif /* WINDOWSNT */

\f
DEFUN ("default-printer-name", Fdefault_printer_name, Sdefault_printer_name,
       0, 0, 0, doc: /* Return the name of Windows default printer device.  */)
  (void)
{
  static char pname_buf[256];
  int err;
  HANDLE hPrn;
  PRINTER_INFO_2 *ppi2 = NULL;
  DWORD dwNeeded = 0, dwReturned = 0;

  /* Retrieve the default string from Win.ini (the registry).
   * String will be in form "printername,drivername,portname".
   * This is the most portable way to get the default printer. */
  if (GetProfileString ("windows", "device", ",,", pname_buf, sizeof (pname_buf)) <= 0)
    return Qnil;
  /* printername precedes first "," character */
  strtok (pname_buf, ",");
  /* We want to know more than the printer name */
  if (!OpenPrinter (pname_buf, &hPrn, NULL))
    return Qnil;
  GetPrinter (hPrn, 2, NULL, 0, &dwNeeded);
  if (dwNeeded == 0)
    {
      ClosePrinter (hPrn);
      return Qnil;
    }
  /* Allocate memory for the PRINTER_INFO_2 struct */
  ppi2 = xmalloc (dwNeeded);
  if (!ppi2)
    {
      ClosePrinter (hPrn);
      return Qnil;
    }
  /* Call GetPrinter again with big enough memory block.  */
  err = GetPrinter (hPrn, 2, (LPBYTE)ppi2, dwNeeded, &dwReturned);
  ClosePrinter (hPrn);
  if (!err)
    {
      xfree (ppi2);
      return Qnil;
    }

  if (ppi2)
    {
      if (ppi2->Attributes & PRINTER_ATTRIBUTE_SHARED && ppi2->pServerName)
        {
          /* a remote printer */
          if (*ppi2->pServerName == '\\')
            snprintf (pname_buf, sizeof (pname_buf), "%s\\%s", ppi2->pServerName,
                       ppi2->pShareName);
          else
            snprintf (pname_buf, sizeof (pname_buf), "\\\\%s\\%s", ppi2->pServerName,
                       ppi2->pShareName);
          pname_buf[sizeof (pname_buf) - 1] = '\0';
        }
      else
        {
          /* a local printer */
          strncpy (pname_buf, ppi2->pPortName, sizeof (pname_buf));
          pname_buf[sizeof (pname_buf) - 1] = '\0';
          /* `pPortName' can include several ports, delimited by ','.
           * we only use the first one. */
          strtok (pname_buf, ",");
        }
      xfree (ppi2);
    }

  return build_string (pname_buf);
}
\f

/* Equivalent of strerror for W32 error codes.  */
char *
w32_strerror (int error_no)
{
  static char buf[500];
  DWORD ret;

  if (error_no == 0)
    error_no = GetLastError ();

  ret = FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM |
                       FORMAT_MESSAGE_IGNORE_INSERTS,
                       NULL,
                       error_no,
                       0, /* choose most suitable language */
                       buf, sizeof (buf), NULL);

  while (ret > 0 && (buf[ret - 1] == '\n' ||
                     buf[ret - 1] == '\r' ))
      --ret;
  buf[ret] = '\0';
  if (!ret)
    sprintf (buf, "w32 error %u", error_no);

  return buf;
}

/* For convenience when debugging.  (You cannot call GetLastError
   directly from GDB: it will crash, because it uses the __stdcall
   calling convention, not the _cdecl convention assumed by GDB.)  */
DWORD
w32_last_error (void)
{
  return GetLastError ();
}

/* Cache information describing the NT system for later use.  */
void
cache_system_info (void)
{
  union
    {
      struct info
        {
          char  major;
          char  minor;
          short platform;
        } info;
      DWORD data;
    } version;

  /* Cache the module handle of Emacs itself.  */
  hinst = GetModuleHandle (NULL);

  /* Cache the version of the operating system.  */
  version.data = GetVersion ();
  w32_major_version = version.info.major;
  w32_minor_version = version.info.minor;

  if (version.info.platform & 0x8000)
    os_subtype = OS_9X;
  else
    os_subtype = OS_NT;

  /* Cache page size, allocation unit, processor type, etc.  */
  GetSystemInfo (&sysinfo_cache);
  syspage_mask = (DWORD_PTR)sysinfo_cache.dwPageSize - 1;

  /* Cache os info.  */
  osinfo_cache.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
  GetVersionEx (&osinfo_cache);

  w32_build_number = osinfo_cache.dwBuildNumber;
  if (os_subtype == OS_9X)
    w32_build_number &= 0xffff;

  w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
}

#ifdef EMACSDEBUG
void
_DebPrint (const char *fmt, ...)
{
  char buf[1024];
  va_list args;

  va_start (args, fmt);
  vsprintf (buf, fmt, args);
  va_end (args);
#if CYGWIN
  fprintf (stderr, "%s", buf);
#endif
  OutputDebugString (buf);
}
#endif

int
w32_console_toggle_lock_key (int vk_code, Lisp_Object new_state)
{
  int cur_state = (GetKeyState (vk_code) & 1);

  if (NILP (new_state)
      || (NUMBERP (new_state)
          && ((XUINT (new_state)) & 1) != cur_state))
    {
#ifdef WINDOWSNT
      faked_key = vk_code;
#endif /* WINDOWSNT */

      keybd_event ((BYTE) vk_code,
                   (BYTE) MapVirtualKey (vk_code, 0),
                   KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
      keybd_event ((BYTE) vk_code,
                   (BYTE) MapVirtualKey (vk_code, 0),
                   KEYEVENTF_EXTENDEDKEY | 0, 0);
      keybd_event ((BYTE) vk_code,
                   (BYTE) MapVirtualKey (vk_code, 0),
                   KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
      cur_state = !cur_state;
    }

  return cur_state;
}

/* Translate console modifiers to emacs modifiers.
   German keyboard support (Kai Morgan Zeise 2/18/95).  */
int
w32_kbd_mods_to_emacs (DWORD mods, WORD key)
{
  int retval = 0;

  /* If we recognize right-alt and left-ctrl as AltGr, and it has been
     pressed, first remove those modifiers.  */
  if (!NILP (Vw32_recognize_altgr)
      && (mods & (RIGHT_ALT_PRESSED | LEFT_CTRL_PRESSED))
      == (RIGHT_ALT_PRESSED | LEFT_CTRL_PRESSED))
    mods &= ~ (RIGHT_ALT_PRESSED | LEFT_CTRL_PRESSED);

  if (mods & (RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED))
    retval = ((NILP (Vw32_alt_is_meta)) ? alt_modifier : meta_modifier);

  if (mods & (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED))
    {
      retval |= ctrl_modifier;
      if ((mods & (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED))
          == (RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED))
        retval |= meta_modifier;
    }

  if (mods & LEFT_WIN_PRESSED)
    retval |= w32_key_to_modifier (VK_LWIN);
  if (mods & RIGHT_WIN_PRESSED)
    retval |= w32_key_to_modifier (VK_RWIN);
  if (mods & APPS_PRESSED)
    retval |= w32_key_to_modifier (VK_APPS);
  if (mods & SCROLLLOCK_ON)
    retval |= w32_key_to_modifier (VK_SCROLL);

  /* Just in case someone wanted the original behavior, make it
     optional by setting w32-capslock-is-shiftlock to t.  */
  if (NILP (Vw32_capslock_is_shiftlock)
      /* Keys that should _not_ be affected by CapsLock.  */
      && (    (key == VK_BACK)
           || (key == VK_TAB)
           || (key == VK_CLEAR)
           || (key == VK_RETURN)
           || (key == VK_ESCAPE)
           || ((key >= VK_SPACE) && (key <= VK_HELP))
           || ((key >= VK_NUMPAD0) && (key <= VK_F24))
           || ((key >= VK_NUMPAD_CLEAR) && (key <= VK_NUMPAD_DELETE))
         ))
    {
      /* Only consider shift state.  */
      if ((mods & SHIFT_PRESSED) != 0)
        retval |= shift_modifier;
    }
  else
    {
      /* Ignore CapsLock state if not enabled.  */
      if (NILP (Vw32_enable_caps_lock))
        mods &= ~CAPSLOCK_ON;
      if ((mods & (SHIFT_PRESSED | CAPSLOCK_ON)) != 0)
        retval |= shift_modifier;
    }

  return retval;
}

/* The return code indicates key code size.  cpID is the codepage to
   use for translation to Unicode; -1 means use the current console
   input codepage.  */
int
w32_kbd_patch_key (KEY_EVENT_RECORD *event, int cpId)
{
  unsigned int key_code = event->wVirtualKeyCode;
  unsigned int mods = event->dwControlKeyState;
  BYTE keystate[256];
  static BYTE ansi_code[4];
  static int isdead = 0;

  if (isdead == 2)
    {
      event->uChar.AsciiChar = ansi_code[2];
      isdead = 0;
      return 1;
    }
  if (event->uChar.AsciiChar != 0)
    return 1;

  memset (keystate, 0, sizeof (keystate));
  keystate[key_code] = 0x80;
  if (mods & SHIFT_PRESSED)
    keystate[VK_SHIFT] = 0x80;
  if (mods & CAPSLOCK_ON)
    keystate[VK_CAPITAL] = 1;
  /* If we recognize right-alt and left-ctrl as AltGr, set the key
     states accordingly before invoking ToAscii.  */
  if (!NILP (Vw32_recognize_altgr)
      && (mods & LEFT_CTRL_PRESSED) && (mods & RIGHT_ALT_PRESSED))
    {
      keystate[VK_CONTROL] = 0x80;
      keystate[VK_LCONTROL] = 0x80;
      keystate[VK_MENU] = 0x80;
      keystate[VK_RMENU] = 0x80;
    }

#if 0
  /* Because of an OS bug, ToAscii corrupts the stack when called to
     convert a dead key in console mode on NT4.  Unfortunately, trying
     to check for dead keys using MapVirtualKey doesn't work either -
     these functions apparently use internal information about keyboard
     layout which doesn't get properly updated in console programs when
     changing layout (though apparently it gets partly updated,
     otherwise ToAscii wouldn't crash).  */
  if (is_dead_key (event->wVirtualKeyCode))
    return 0;
#endif

  /* On NT, call ToUnicode instead and then convert to the current
     console input codepage.  */
  if (os_subtype == OS_NT)
    {
      WCHAR buf[128];

      isdead = ToUnicode (event->wVirtualKeyCode, event->wVirtualScanCode,
                          keystate, buf, 128, 0);
      if (isdead > 0)
        {
          /* When we are called from the GUI message processing code,
             we are passed the current keyboard codepage, a positive
             number, to use below.  */
          if (cpId == -1)
            cpId = GetConsoleCP ();

          event->uChar.UnicodeChar = buf[isdead - 1];
          isdead = WideCharToMultiByte (cpId, 0, buf, isdead,
                                        ansi_code, 4, NULL, NULL);
        }
      else
        isdead = 0;
    }
  else
    {
      isdead = ToAscii (event->wVirtualKeyCode, event->wVirtualScanCode,
                        keystate, (LPWORD) ansi_code, 0);
    }

  if (isdead == 0)
    return 0;
  event->uChar.AsciiChar = ansi_code[0];
  return isdead;
}


void
w32_sys_ring_bell (struct frame *f)
{
  if (sound_type == 0xFFFFFFFF)
    {
      Beep (666, 100);
    }
  else if (sound_type == MB_EMACS_SILENT)
    {
      /* Do nothing.  */
    }
  else
    MessageBeep (sound_type);
}

\f
/***********************************************************************
                            Initialization
 ***********************************************************************/

/* Keep this list in the same order as frame_parms in frame.c.
   Use 0 for unsupported frame parameters.  */

frame_parm_handler w32_frame_parm_handlers[] =
{
  x_set_autoraise,
  x_set_autolower,
  x_set_background_color,
  x_set_border_color,
  x_set_border_width,
  x_set_cursor_color,
  x_set_cursor_type,
  x_set_font,
  x_set_foreground_color,
  x_set_icon_name,
  x_set_icon_type,
  x_set_internal_border_width,
  x_set_menu_bar_lines,
  x_set_mouse_color,
  x_explicitly_set_name,
  x_set_scroll_bar_width,
  x_set_title,
  x_set_unsplittable,
  x_set_vertical_scroll_bars,
  x_set_visibility,
  x_set_tool_bar_lines,
  0, /* x_set_scroll_bar_foreground, */
  0, /* x_set_scroll_bar_background, */
  x_set_screen_gamma,
  x_set_line_spacing,
  x_set_fringe_width,
  x_set_fringe_width,
  0, /* x_set_wait_for_wm, */
  x_set_fullscreen,
  x_set_font_backend,
  x_set_alpha,
  0, /* x_set_sticky */
  0, /* x_set_tool_bar_position */
};

void
syms_of_w32fns (void)
{
  globals_of_w32fns ();
  track_mouse_window = NULL;

  w32_visible_system_caret_hwnd = NULL;

  DEFSYM (Qsuppress_icon, "suppress-icon");
  DEFSYM (Qundefined_color, "undefined-color");
  DEFSYM (Qcancel_timer, "cancel-timer");
  DEFSYM (Qhyper, "hyper");
  DEFSYM (Qsuper, "super");
  DEFSYM (Qmeta, "meta");
  DEFSYM (Qalt, "alt");
  DEFSYM (Qctrl, "ctrl");
  DEFSYM (Qcontrol, "control");
  DEFSYM (Qshift, "shift");
  DEFSYM (Qfont_param, "font-parameter");
  DEFSYM (Qgeometry, "geometry");
  DEFSYM (Qworkarea, "workarea");
  DEFSYM (Qmm_size, "mm-size");
  DEFSYM (Qframes, "frames");
  /* This is the end of symbol initialization.  */


  Fput (Qundefined_color, Qerror_conditions,
        listn (CONSTYPE_PURE, 2, Qundefined_color, Qerror));
  Fput (Qundefined_color, Qerror_message,
        build_pure_c_string ("Undefined color"));

  staticpro (&w32_grabbed_keys);
  w32_grabbed_keys = Qnil;

  DEFVAR_LISP ("w32-color-map", Vw32_color_map,
               doc: /* An array of color name mappings for Windows.  */);
  Vw32_color_map = Qnil;

  DEFVAR_LISP ("w32-pass-alt-to-system", Vw32_pass_alt_to_system,
               doc: /* Non-nil if Alt key presses are passed on to Windows.
When non-nil, for example, Alt pressed and released and then space will
open the System menu.  When nil, Emacs processes the Alt key events, and
then silently swallows them.  */);
  Vw32_pass_alt_to_system = Qnil;

  DEFVAR_LISP ("w32-alt-is-meta", Vw32_alt_is_meta,
               doc: /* Non-nil if the Alt key is to be considered the same as the META key.
When nil, Emacs will translate the Alt key to the ALT modifier, not to META.  */);
  Vw32_alt_is_meta = Qt;

  DEFVAR_INT ("w32-quit-key", w32_quit_key,
               doc: /* If non-zero, the virtual key code for an alternative quit key.  */);
  w32_quit_key = 0;

  DEFVAR_LISP ("w32-pass-lwindow-to-system",
               Vw32_pass_lwindow_to_system,
               doc: /* If non-nil, the left \"Windows\" key is passed on to Windows.

When non-nil, the Start menu is opened by tapping the key.
If you set this to nil, the left \"Windows\" key is processed by Emacs
according to the value of `w32-lwindow-modifier', which see.

Note that some combinations of the left \"Windows\" key with other keys are
caught by Windows at low level, and so binding them in Emacs will have no
effect.  For example, <lwindow>-r always pops up the Windows Run dialog,
<lwindow>-<Pause> pops up the "System Properties" dialog, etc.  However, see
the doc string of `w32-phantom-key-code'.  */);
  Vw32_pass_lwindow_to_system = Qt;

  DEFVAR_LISP ("w32-pass-rwindow-to-system",
               Vw32_pass_rwindow_to_system,
               doc: /* If non-nil, the right \"Windows\" key is passed on to Windows.

When non-nil, the Start menu is opened by tapping the key.
If you set this to nil, the right \"Windows\" key is processed by Emacs
according to the value of `w32-rwindow-modifier', which see.

Note that some combinations of the right \"Windows\" key with other keys are
caught by Windows at low level, and so binding them in Emacs will have no
effect.  For example, <rwindow>-r always pops up the Windows Run dialog,
<rwindow>-<Pause> pops up the "System Properties" dialog, etc.  However, see
the doc string of `w32-phantom-key-code'.  */);
  Vw32_pass_rwindow_to_system = Qt;

  DEFVAR_LISP ("w32-phantom-key-code",
               Vw32_phantom_key_code,
               doc: /* Virtual key code used to generate \"phantom\" key presses.
Value is a number between 0 and 255.

Phantom key presses are generated in order to stop the system from
acting on \"Windows\" key events when `w32-pass-lwindow-to-system' or
`w32-pass-rwindow-to-system' is nil.  */);
  /* Although 255 is technically not a valid key code, it works and
     means that this hack won't interfere with any real key code.  */
  XSETINT (Vw32_phantom_key_code, 255);

  DEFVAR_LISP ("w32-enable-num-lock",
               Vw32_enable_num_lock,
               doc: /* If non-nil, the Num Lock key acts normally.
Set to nil to handle Num Lock as the `kp-numlock' key.  */);
  Vw32_enable_num_lock = Qt;

  DEFVAR_LISP ("w32-enable-caps-lock",
               Vw32_enable_caps_lock,
               doc: /* If non-nil, the Caps Lock key acts normally.
Set to nil to handle Caps Lock as the `capslock' key.  */);
  Vw32_enable_caps_lock = Qt;

  DEFVAR_LISP ("w32-scroll-lock-modifier",
               Vw32_scroll_lock_modifier,
               doc: /* Modifier to use for the Scroll Lock ON state.
The value can be hyper, super, meta, alt, control or shift for the
respective modifier, or nil to handle Scroll Lock as the `scroll' key.
Any other value will cause the Scroll Lock key to be ignored.  */);
  Vw32_scroll_lock_modifier = Qnil;

  DEFVAR_LISP ("w32-lwindow-modifier",
               Vw32_lwindow_modifier,
               doc: /* Modifier to use for the left \"Windows\" key.
The value can be hyper, super, meta, alt, control or shift for the
respective modifier, or nil to appear as the `lwindow' key.
Any other value will cause the key to be ignored.  */);
  Vw32_lwindow_modifier = Qnil;

  DEFVAR_LISP ("w32-rwindow-modifier",
               Vw32_rwindow_modifier,
               doc: /* Modifier to use for the right \"Windows\" key.
The value can be hyper, super, meta, alt, control or shift for the
respective modifier, or nil to appear as the `rwindow' key.
Any other value will cause the key to be ignored.  */);
  Vw32_rwindow_modifier = Qnil;

  DEFVAR_LISP ("w32-apps-modifier",
               Vw32_apps_modifier,
               doc: /* Modifier to use for the \"Apps\" key.
The value can be hyper, super, meta, alt, control or shift for the
respective modifier, or nil to appear as the `apps' key.
Any other value will cause the key to be ignored.  */);
  Vw32_apps_modifier = Qnil;

  DEFVAR_BOOL ("w32-enable-synthesized-fonts", w32_enable_synthesized_fonts,
               doc: /* Non-nil enables selection of artificially italicized and bold fonts.  */);
  w32_enable_synthesized_fonts = 0;

  DEFVAR_LISP ("w32-enable-palette", Vw32_enable_palette,
               doc: /* Non-nil enables Windows palette management to map colors exactly.  */);
  Vw32_enable_palette = Qt;

  DEFVAR_INT ("w32-mouse-button-tolerance",
              w32_mouse_button_tolerance,
              doc: /* Analogue of double click interval for faking middle mouse events.
The value is the minimum time in milliseconds that must elapse between
left and right button down events before they are considered distinct events.
If both mouse buttons are depressed within this interval, a middle mouse
button down event is generated instead.  */);
  w32_mouse_button_tolerance = GetDoubleClickTime () / 2;

  DEFVAR_INT ("w32-mouse-move-interval",
              w32_mouse_move_interval,
              doc: /* Minimum interval between mouse move events.
The value is the minimum time in milliseconds that must elapse between
successive mouse move (or scroll bar drag) events before they are
reported as lisp events.  */);
  w32_mouse_move_interval = 0;

  DEFVAR_BOOL ("w32-pass-extra-mouse-buttons-to-system",
               w32_pass_extra_mouse_buttons_to_system,
               doc: /* If non-nil, the fourth and fifth mouse buttons are passed to Windows.
Recent versions of Windows support mice with up to five buttons.
Since most applications don't support these extra buttons, most mouse
drivers will allow you to map them to functions at the system level.
If this variable is non-nil, Emacs will pass them on, allowing the
system to handle them.  */);
  w32_pass_extra_mouse_buttons_to_system = 0;

  DEFVAR_BOOL ("w32-pass-multimedia-buttons-to-system",
               w32_pass_multimedia_buttons_to_system,
               doc: /* If non-nil, media buttons are passed to Windows.
Some modern keyboards contain buttons for controlling media players, web
browsers and other applications.  Generally these buttons are handled on a
system wide basis, but by setting this to nil they are made available
to Emacs for binding.  Depending on your keyboard, additional keys that
may be available are:

browser-back, browser-forward, browser-refresh, browser-stop,
browser-search, browser-favorites, browser-home,
mail, mail-reply, mail-forward, mail-send,
app-1, app-2,
help, find, new, open, close, save, print, undo, redo, copy, cut, paste,
spell-check, correction-list, toggle-dictate-command,
media-next, media-previous, media-stop, media-play-pause, media-select,
media-play, media-pause, media-record, media-fast-forward, media-rewind,
media-channel-up, media-channel-down,
volume-mute, volume-up, volume-down,
mic-volume-mute, mic-volume-down, mic-volume-up, mic-toggle,
bass-down, bass-boost, bass-up, treble-down, treble-up  */);
  w32_pass_multimedia_buttons_to_system = 1;

#if 0 /* TODO: Mouse cursor customization.  */
  DEFVAR_LISP ("x-pointer-shape", Vx_pointer_shape,
               doc: /* The shape of the pointer when over text.
Changing the value does not affect existing frames
unless you set the mouse color.  */);
  Vx_pointer_shape = Qnil;

  Vx_nontext_pointer_shape = Qnil;

  Vx_mode_pointer_shape = Qnil;

  DEFVAR_LISP ("x-hourglass-pointer-shape", Vx_hourglass_pointer_shape,
               doc: /* The shape of the pointer when Emacs is busy.
This variable takes effect when you create a new frame
or when you set the mouse color.  */);
  Vx_hourglass_pointer_shape = Qnil;

  DEFVAR_LISP ("x-sensitive-text-pointer-shape",
               Vx_sensitive_text_pointer_shape,
               doc: /* The shape of the pointer when over mouse-sensitive text.
This variable takes effect when you create a new frame
or when you set the mouse color.  */);
  Vx_sensitive_text_pointer_shape = Qnil;

  DEFVAR_LISP ("x-window-horizontal-drag-cursor",
               Vx_window_horizontal_drag_shape,
               doc: /* Pointer shape to use for indicating a window can be dragged horizontally.
This variable takes effect when you create a new frame
or when you set the mouse color.  */);
  Vx_window_horizontal_drag_shape = Qnil;
#endif

  DEFVAR_LISP ("x-cursor-fore-pixel", Vx_cursor_fore_pixel,
               doc: /* A string indicating the foreground color of the cursor box.  */);
  Vx_cursor_fore_pixel = Qnil;

  DEFVAR_LISP ("x-max-tooltip-size", Vx_max_tooltip_size,
               doc: /* Maximum size for tooltips.
Value is a pair (COLUMNS . ROWS).  Text larger than this is clipped.  */);
  Vx_max_tooltip_size = Fcons (make_number (80), make_number (40));

  DEFVAR_LISP ("x-no-window-manager", Vx_no_window_manager,
               doc: /* Non-nil if no window manager is in use.
Emacs doesn't try to figure this out; this is always nil
unless you set it to something else.  */);
  /* We don't have any way to find this out, so set it to nil
     and maybe the user would like to set it to t.  */
  Vx_no_window_manager = Qnil;

  DEFVAR_LISP ("x-pixel-size-width-font-regexp",
               Vx_pixel_size_width_font_regexp,
               doc: /* Regexp matching a font name whose width is the same as `PIXEL_SIZE'.

Since Emacs gets width of a font matching with this regexp from
PIXEL_SIZE field of the name, font finding mechanism gets faster for
such a font.  This is especially effective for such large fonts as
Chinese, Japanese, and Korean.  */);
  Vx_pixel_size_width_font_regexp = Qnil;

  DEFVAR_LISP ("w32-bdf-filename-alist",
               Vw32_bdf_filename_alist,
               doc: /* List of bdf fonts and their corresponding filenames.  */);
  Vw32_bdf_filename_alist = Qnil;

  DEFVAR_BOOL ("w32-strict-fontnames",
               w32_strict_fontnames,
               doc: /* Non-nil means only use fonts that are exact matches for those requested.
Default is nil, which allows old fontnames that are not XLFD compliant,
and allows third-party CJK display to work by specifying false charset
fields to trick Emacs into translating to Big5, SJIS etc.
Setting this to t will prevent wrong fonts being selected when
fontsets are automatically created.  */);
  w32_strict_fontnames = 0;

  DEFVAR_BOOL ("w32-strict-painting",
               w32_strict_painting,
               doc: /* Non-nil means use strict rules for repainting frames.
Set this to nil to get the old behavior for repainting; this should
only be necessary if the default setting causes problems.  */);
  w32_strict_painting = 1;

#if 0 /* TODO: Port to W32 */
  defsubr (&Sx_change_window_property);
  defsubr (&Sx_delete_window_property);
  defsubr (&Sx_window_property);
#endif
  defsubr (&Sxw_display_color_p);
  defsubr (&Sx_display_grayscale_p);
  defsubr (&Sxw_color_defined_p);
  defsubr (&Sxw_color_values);
  defsubr (&Sx_server_max_request_size);
  defsubr (&Sx_server_vendor);
  defsubr (&Sx_server_version);
  defsubr (&Sx_display_pixel_width);
  defsubr (&Sx_display_pixel_height);
  defsubr (&Sx_display_mm_width);
  defsubr (&Sx_display_mm_height);
  defsubr (&Sx_display_screens);
  defsubr (&Sx_display_planes);
  defsubr (&Sx_display_color_cells);
  defsubr (&Sx_display_visual_class);
  defsubr (&Sx_display_backing_store);
  defsubr (&Sx_display_save_under);
  defsubr (&Sx_create_frame);
  defsubr (&Sx_open_connection);
  defsubr (&Sx_close_connection);
  defsubr (&Sx_display_list);
  defsubr (&Sx_synchronize);

  /* W32 specific functions */

  defsubr (&Sw32_define_rgb_color);
  defsubr (&Sw32_default_color_map);
  defsubr (&Sw32_display_monitor_attributes_list);
  defsubr (&Sw32_send_sys_command);
  defsubr (&Sw32_shell_execute);
  defsubr (&Sw32_register_hot_key);
  defsubr (&Sw32_unregister_hot_key);
  defsubr (&Sw32_registered_hot_keys);
  defsubr (&Sw32_reconstruct_hot_key);
  defsubr (&Sw32_toggle_lock_key);
  defsubr (&Sw32_window_exists_p);
  defsubr (&Sw32_battery_status);

#ifdef WINDOWSNT
  defsubr (&Sfile_system_info);
#endif

  defsubr (&Sdefault_printer_name);
  defsubr (&Sset_message_beep);

  hourglass_hwnd = NULL;

  defsubr (&Sx_show_tip);
  defsubr (&Sx_hide_tip);
  tip_timer = Qnil;
  staticpro (&tip_timer);
  tip_frame = Qnil;
  staticpro (&tip_frame);

  last_show_tip_args = Qnil;
  staticpro (&last_show_tip_args);

  defsubr (&Sx_file_dialog);
#ifdef WINDOWSNT
  defsubr (&Ssystem_move_file_to_trash);
#endif
}


/*
        globals_of_w32fns is used to initialize those global variables that
        must always be initialized on startup even when the global variable
        initialized is non zero (see the function main in emacs.c).
        globals_of_w32fns is called from syms_of_w32fns when the global
        variable initialized is 0 and directly from main when initialized
        is non zero.
 */
void
globals_of_w32fns (void)
{
  HMODULE user32_lib = GetModuleHandle ("user32.dll");
  /*
    TrackMouseEvent not available in all versions of Windows, so must load
    it dynamically.  Do it once, here, instead of every time it is used.
  */
  track_mouse_event_fn = (TrackMouseEvent_Proc)
    GetProcAddress (user32_lib, "TrackMouseEvent");

  monitor_from_point_fn = (MonitorFromPoint_Proc)
    GetProcAddress (user32_lib, "MonitorFromPoint");
  get_monitor_info_fn = (GetMonitorInfo_Proc)
    GetProcAddress (user32_lib, "GetMonitorInfoA");
  monitor_from_window_fn = (MonitorFromWindow_Proc)
    GetProcAddress (user32_lib, "MonitorFromWindow");
  enum_display_monitors_fn = (EnumDisplayMonitors_Proc)
    GetProcAddress (user32_lib, "EnumDisplayMonitors");

  {
    HMODULE imm32_lib = GetModuleHandle ("imm32.dll");
    get_composition_string_fn = (ImmGetCompositionString_Proc)
      GetProcAddress (imm32_lib, "ImmGetCompositionStringW");
    get_ime_context_fn = (ImmGetContext_Proc)
      GetProcAddress (imm32_lib, "ImmGetContext");
    release_ime_context_fn = (ImmReleaseContext_Proc)
      GetProcAddress (imm32_lib, "ImmReleaseContext");
    set_ime_composition_window_fn = (ImmSetCompositionWindow_Proc)
      GetProcAddress (imm32_lib, "ImmSetCompositionWindow");
  }
  DEFVAR_INT ("w32-ansi-code-page",
              w32_ansi_code_page,
              doc: /* The ANSI code page used by the system.  */);
  w32_ansi_code_page = GetACP ();

  if (os_subtype == OS_NT)
    w32_unicode_gui = 1;
  else
    w32_unicode_gui = 0;

  /* MessageBox does not work without this when linked to comctl32.dll 6.0.  */
  InitCommonControls ();

  syms_of_w32uniscribe ();
}

typedef USHORT (WINAPI * CaptureStackBackTrace_proc) (ULONG, ULONG, PVOID *,
                                                      PULONG);

#define BACKTRACE_LIMIT_MAX 62

int
w32_backtrace (void **buffer, int limit)
{
  static CaptureStackBackTrace_proc s_pfn_CaptureStackBackTrace = NULL;
  HMODULE hm_kernel32 = NULL;

  if (!s_pfn_CaptureStackBackTrace)
    {
      hm_kernel32 = LoadLibrary ("Kernel32.dll");
      s_pfn_CaptureStackBackTrace =
        (CaptureStackBackTrace_proc) GetProcAddress (hm_kernel32,
                                                     "RtlCaptureStackBackTrace");
    }
  if (s_pfn_CaptureStackBackTrace)
    return s_pfn_CaptureStackBackTrace (0, min (BACKTRACE_LIMIT_MAX, limit),
                                        buffer, NULL);
  return 0;
}

void
emacs_abort (void)
{
  int button;
  button = MessageBox (NULL,
                       "A fatal error has occurred!\n\n"
                       "Would you like to attach a debugger?\n\n"
                       "Select:\n"
                       "YES -- to debug Emacs, or\n"
                       "NO  -- to abort Emacs and produce a backtrace\n"
                       "       (emacs_backtrace.txt in current directory)."
#if __GNUC__
                       "\n\n(type \"gdb -p <emacs-PID>\" and\n"
                       "\"continue\" inside GDB before clicking YES.)"
#endif
                       , "Emacs Abort Dialog",
                       MB_ICONEXCLAMATION | MB_TASKMODAL
                       | MB_SETFOREGROUND | MB_YESNO);
  switch (button)
    {
    case IDYES:
      DebugBreak ();
      exit (2); /* tell the compiler we will never return */
    case IDNO:
    default:
      {
        void *stack[BACKTRACE_LIMIT_MAX + 1];
        int i = w32_backtrace (stack, BACKTRACE_LIMIT_MAX + 1);

        if (i)
          {
#ifdef CYGWIN
            int stderr_fd = 2;
#else
            HANDLE errout = GetStdHandle (STD_ERROR_HANDLE);
            int stderr_fd = -1;
#endif
            int errfile_fd = -1;
            int j;

#ifndef CYGWIN
            if (errout && errout != INVALID_HANDLE_VALUE)
              stderr_fd = _open_osfhandle ((intptr_t)errout, O_APPEND | O_BINARY);
#endif
            if (stderr_fd >= 0)
              write (stderr_fd, "\r\nBacktrace:\r\n", 14);
#ifdef CYGWIN
#define _open open
#endif
            errfile_fd = _open ("emacs_backtrace.txt", O_RDWR | O_CREAT | O_BINARY, S_IREAD | S_IWRITE);
            if (errfile_fd >= 0)
              {
                lseek (errfile_fd, 0L, SEEK_END);
                write (errfile_fd, "\r\nBacktrace:\r\n", 14);
              }

            for (j = 0; j < i; j++)
              {
                char buf[INT_BUFSIZE_BOUND (void *)];

                /* stack[] gives the return addresses, whereas we want
                   the address of the call, so decrease each address
                   by approximate size of 1 CALL instruction.  */
                sprintf (buf, "0x%p\r\n", (char *)stack[j] - sizeof(void *));
                if (stderr_fd >= 0)
                  write (stderr_fd, buf, strlen (buf));
                if (errfile_fd >= 0)
                  write (errfile_fd, buf, strlen (buf));
              }
            if (i == BACKTRACE_LIMIT_MAX)
              {
                if (stderr_fd >= 0)
                  write (stderr_fd, "...\r\n", 5);
                if (errfile_fd >= 0)
                  write (errfile_fd, "...\r\n", 5);
              }
            if (errfile_fd >= 0)
              close (errfile_fd);
          }
        abort ();
        break;
      }
    }
}

#ifdef NTGUI_UNICODE

Lisp_Object
ntgui_encode_system (Lisp_Object str)
{
  Lisp_Object encoded;
  to_unicode (str, &encoded);
  return encoded;
}

#endif /* NTGUI_UNICODE */