w32term.c 202 KB
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/* Implementation of GUI terminal on the Microsoft W32 API.
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   Copyright (C) 1989, 1993, 1994, 1995, 1996, 1997, 1998,
                 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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                 2006, 2007, 2008 Free Software Foundation, Inc.
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This file is part of GNU Emacs.

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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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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
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along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
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#include <config.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "lisp.h"
#include "blockinput.h"
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#include "w32term.h"
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#include "systty.h"
#include "systime.h"

#include <ctype.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/stat.h>

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#include "charset.h"
#include "character.h"
#include "coding.h"
#include "ccl.h"
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#include "frame.h"
#include "dispextern.h"
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#include "fontset.h"
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#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#include "disptab.h"
#include "buffer.h"
#include "window.h"
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#include "keyboard.h"
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#include "intervals.h"
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#include "process.h"
#include "atimer.h"
#include "keymap.h"

#include "w32heap.h"
#include "w32bdf.h"
#include <shellapi.h>
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#include "font.h"
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#include "w32font.h"
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/* Fringe bitmaps.  */
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static int max_fringe_bmp = 0;
static HBITMAP *fringe_bmp = 0;
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/* Non-nil means Emacs uses toolkit scroll bars.  */
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Lisp_Object Vx_toolkit_scroll_bars;
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/* Temporary variables for w32_read_socket.  */
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static int last_mousemove_x = 0;
static int last_mousemove_y = 0;
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/* Define GET_WHEEL_DELTA_WPARAM macro if system headers don't.  */
#ifndef GET_WHEEL_DELTA_WPARAM
#define GET_WHEEL_DELTA_WPARAM(wparam) ((short)HIWORD (wparam))
#endif

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/* Non-zero means that a HELP_EVENT has been generated since Emacs
   start.  */

static int any_help_event_p;

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/* Last window where we saw the mouse.  Used by mouse-autoselect-window.  */
static Lisp_Object last_window;

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/* Non-zero means make use of UNDERLINE_POSITION font properties.
   (Not yet supported, see TODO in x_draw_glyph_string.)  */
int x_use_underline_position_properties;

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/* Non-zero means to draw the underline at the same place as the descent line.  */

int x_underline_at_descent_line;

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extern unsigned int msh_mousewheel;

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extern void free_frame_menubar ();

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extern int w32_codepage_for_font (char *fontname);
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extern Cursor w32_load_cursor (LPCTSTR name);
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extern glyph_metric *w32_BDF_TextMetric(bdffont *fontp,
					unsigned char *text, int dim);
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extern Lisp_Object Vwindow_system;

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#define x_any_window_to_frame x_window_to_frame
#define x_top_window_to_frame x_window_to_frame


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/* This is display since w32 does not support multiple ones.  */
struct w32_display_info one_w32_display_info;
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struct w32_display_info *x_display_list;
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/* This is a list of cons cells, each of the form (NAME . FONT-LIST-CACHE),
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   one for each element of w32_display_list and in the same order.
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   NAME is the name of the frame.
   FONT-LIST-CACHE records previous values returned by x-list-fonts.  */
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Lisp_Object w32_display_name_list;
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#ifndef GLYPHSET
/* Pre Windows 2000, this was not available, but define it here so
   that Emacs compiled on such a platform will run on newer versions.  */

typedef struct tagWCRANGE
{
  WCHAR wcLow;
  USHORT cGlyphs;
} WCRANGE;

typedef struct tagGLYPHSET 
{
  DWORD cbThis;
  DWORD flAccel;
  DWORD cGlyphsSupported;
  DWORD cRanges;
  WCRANGE ranges[1];
} GLYPHSET;  

#endif

/* Dynamic linking to GetFontUnicodeRanges (not available on 95, 98, ME).  */
DWORD (PASCAL *pfnGetFontUnicodeRanges) (HDC device, GLYPHSET *ranges);

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/* Frame being updated by update_frame.  This is declared in term.c.
   This is set by update_begin and looked at by all the
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   w32 functions.  It is zero while not inside an update.
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   In that case, the w32 functions assume that `SELECTED_FRAME ()'
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   is the frame to apply to.  */
extern struct frame *updating_frame;

/* This is a frame waiting to be autoraised, within w32_read_socket.  */
struct frame *pending_autoraise_frame;

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/* The handle of the frame that currently owns the system caret.  */
HWND w32_system_caret_hwnd;
int w32_system_caret_height;
int w32_system_caret_x;
int w32_system_caret_y;
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int w32_use_visible_system_caret;
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/* Flag to enable Unicode output in case users wish to use programs
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   like Twinbridge on '95 rather than installed system level support
   for Far East languages.  */
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int w32_enable_unicode_output;
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/* Flag to enable Cleartype hack for font metrics.  */
static int cleartype_active;

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DWORD dwWindowsThreadId = 0;
HANDLE hWindowsThread = NULL;
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DWORD dwMainThreadId = 0;
HANDLE hMainThread = NULL;

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int vertical_scroll_bar_min_handle;
int vertical_scroll_bar_top_border;
int vertical_scroll_bar_bottom_border;

int last_scroll_bar_drag_pos;

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/* Mouse movement. */

/* Where the mouse was last time we reported a mouse event.  */
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static RECT last_mouse_glyph;
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static FRAME_PTR last_mouse_glyph_frame;
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static Lisp_Object last_mouse_press_frame;
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int w32_num_mouse_buttons;
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Lisp_Object Vw32_swap_mouse_buttons;
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/* Control whether x_raise_frame also sets input focus.  */
Lisp_Object Vw32_grab_focus_on_raise;

/* Control whether Caps Lock affects non-ascii characters.  */
Lisp_Object Vw32_capslock_is_shiftlock;

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/* Control whether right-alt and left-ctrl should be recognized as AltGr.  */
Lisp_Object Vw32_recognize_altgr;

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/* The scroll bar in which the last motion event occurred.

   If the last motion event occurred in a scroll bar, we set this
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   so w32_mouse_position can know whether to report a scroll bar motion or
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   an ordinary motion.

   If the last motion event didn't occur in a scroll bar, we set this
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   to Qnil, to tell w32_mouse_position to return an ordinary motion event.  */
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static Lisp_Object last_mouse_scroll_bar;
static int last_mouse_scroll_bar_pos;
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/* This is a hack.  We would really prefer that w32_mouse_position would
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   return the time associated with the position it returns, but there
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   doesn't seem to be any way to wrest the time-stamp from the server
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   along with the position query.  So, we just keep track of the time
   of the last movement we received, and return that in hopes that
   it's somewhat accurate.  */

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static Time last_mouse_movement_time;

/* Incremented by w32_read_socket whenever it really tries to read
   events.  */
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#ifdef __STDC__
static int volatile input_signal_count;
#else
static int input_signal_count;
#endif

extern Lisp_Object Vcommand_line_args, Vsystem_name;

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#ifndef USE_CRT_DLL
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extern int errno;
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#endif
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/* A mask of extra modifier bits to put into every keyboard char.  */
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extern EMACS_INT extra_keyboard_modifiers;
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static void x_update_window_end P_ ((struct window *, int, int));
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static void w32_handle_tool_bar_click P_ ((struct frame *,
                                          struct input_event *));
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static void w32_define_cursor P_ ((Window, Cursor));
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void x_lower_frame P_ ((struct frame *));
void x_scroll_bar_clear P_ ((struct frame *));
void x_wm_set_size_hint P_ ((struct frame *, long, int));
void x_raise_frame P_ ((struct frame *));
void x_set_window_size P_ ((struct frame *, int, int, int));
void x_wm_set_window_state P_ ((struct frame *, int));
void x_wm_set_icon_pixmap P_ ((struct frame *, int));
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static void w32_initialize P_ ((void));
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static void x_font_min_bounds P_ ((XFontStruct *, int *, int *));
int x_compute_min_glyph_bounds P_ ((struct frame *));
static void x_update_end P_ ((struct frame *));
static void w32_frame_up_to_date P_ ((struct frame *));
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static void w32_set_terminal_modes P_ ((struct terminal *));
static void w32_reset_terminal_modes P_ ((struct terminal *));
static void x_clear_frame P_ ((struct frame *));
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static void frame_highlight P_ ((struct frame *));
static void frame_unhighlight P_ ((struct frame *));
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static void x_new_focus_frame P_ ((struct w32_display_info *,
				   struct frame *));
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static void x_focus_changed P_ ((int, int, struct w32_display_info *,
				  struct frame *, struct input_event *));
static void w32_detect_focus_change P_ ((struct w32_display_info *,
                                       W32Msg *, struct input_event *));
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static void w32_frame_rehighlight P_ ((struct frame *));
static void x_frame_rehighlight P_ ((struct w32_display_info *));
static void x_draw_hollow_cursor P_ ((struct window *, struct glyph_row *));
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static void x_draw_bar_cursor P_ ((struct window *, struct glyph_row *, int,
				   enum text_cursor_kinds));
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static void w32_clip_to_row P_ ((struct window *, struct glyph_row *, int, HDC));
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static BOOL my_show_window P_ ((struct frame *, HWND, int));
static void my_set_window_pos P_ ((HWND, HWND, int, int, int, int, UINT));
static void my_set_focus P_ ((struct frame *, HWND));
static void my_set_foreground_window P_ ((HWND));
static void my_destroy_window P_ ((struct frame *, HWND));
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static Lisp_Object Qvendor_specific_keysyms;


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/***********************************************************************
			      Debugging
 ***********************************************************************/

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#if 0
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/* This is a function useful for recording debugging information about
   the sequence of occurrences in this file.  */
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struct record
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{
  char *locus;
  int type;
};

struct record event_record[100];

int event_record_index;

record_event (locus, type)
     char *locus;
     int type;
{
  if (event_record_index == sizeof (event_record) / sizeof (struct record))
    event_record_index = 0;

  event_record[event_record_index].locus = locus;
  event_record[event_record_index].type = type;
  event_record_index++;
}

#endif /* 0 */

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void
XChangeGC (void * ignore, XGCValues* gc, unsigned long mask,
	   XGCValues *xgcv)
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{
  if (mask & GCForeground)
    gc->foreground = xgcv->foreground;
  if (mask & GCBackground)
    gc->background = xgcv->background;
  if (mask & GCFont)
    gc->font = xgcv->font;
}

XGCValues *XCreateGC (void * ignore, Window window, unsigned long mask,
                      XGCValues *xgcv)
{
  XGCValues *gc = (XGCValues *) xmalloc (sizeof (XGCValues));
  bzero (gc, sizeof (XGCValues));

  XChangeGC (ignore, gc, mask, xgcv);

  return gc;
}

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void
XGetGCValues (void* ignore, XGCValues *gc,
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                   unsigned long mask, XGCValues *xgcv)
{
  XChangeGC (ignore, xgcv, mask, gc);
}

static void
w32_set_clip_rectangle (HDC hdc, RECT *rect)
{
  if (rect)
    {
      HRGN clip_region = CreateRectRgnIndirect (rect);
      SelectClipRgn (hdc, clip_region);
      DeleteObject (clip_region);
    }
  else
    SelectClipRgn (hdc, NULL);
}


/* Draw a hollow rectangle at the specified position.  */
void
w32_draw_rectangle (HDC hdc, XGCValues *gc, int x, int y,
                    int width, int height)
{
  HBRUSH hb, oldhb;
  HPEN hp, oldhp;

  hb = CreateSolidBrush (gc->background);
  hp = CreatePen (PS_SOLID, 0, gc->foreground);
  oldhb = SelectObject (hdc, hb);
  oldhp = SelectObject (hdc, hp);

  Rectangle (hdc, x, y, x + width, y + height);

  SelectObject (hdc, oldhb);
  SelectObject (hdc, oldhp);
  DeleteObject (hb);
  DeleteObject (hp);
}

/* Draw a filled rectangle at the specified position. */
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void
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w32_fill_rect (f, hdc, pix, lprect)
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     FRAME_PTR f;
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     HDC hdc;
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     COLORREF pix;
     RECT * lprect;
{
  HBRUSH hb;
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  hb = CreateSolidBrush (pix);
  FillRect (hdc, lprect, hb);
  DeleteObject (hb);
}

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void
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w32_clear_window (f)
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     FRAME_PTR f;
{
  RECT rect;
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  HDC hdc = get_frame_dc (f);
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  /* Under certain conditions, this can be called at startup with
     a console frame pointer before the GUI frame is created. An HDC
     of 0 indicates this. */
  if (hdc)
    {
      GetClientRect (FRAME_W32_WINDOW (f), &rect);
      w32_clear_rect (f, hdc, &rect);
    }

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  release_frame_dc (f, hdc);
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}


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/***********************************************************************
		    Starting and ending an update
 ***********************************************************************/
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/* Start an update of frame F.  This function is installed as a hook
   for update_begin, i.e. it is called when update_begin is called.
   This function is called prior to calls to x_update_window_begin for
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   each window being updated.  */
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static void
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x_update_begin (f)
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     struct frame *f;
{
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  struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f);

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  if (! FRAME_W32_P (f))
    return;

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  /* Regenerate display palette before drawing if list of requested
     colors has changed. */
  if (display_info->regen_palette)
  {
    w32_regenerate_palette (f);
    display_info->regen_palette = FALSE;
  }
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}
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/* Start update of window W.  Set the global variable updated_window
   to the window being updated and set output_cursor to the cursor
   position of W.  */

static void
x_update_window_begin (w)
     struct window *w;
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  struct w32_display_info *display_info = FRAME_W32_DISPLAY_INFO (f);

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  /* Hide the system caret during an update.  */
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  if (w32_use_visible_system_caret && w32_system_caret_hwnd)
    {
      SendMessage (w32_system_caret_hwnd, WM_EMACS_HIDE_CARET, 0, 0);
    }
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  updated_window = w;
  set_output_cursor (&w->cursor);
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  BLOCK_INPUT;

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  if (f == display_info->mouse_face_mouse_frame)
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    {
      /* Don't do highlighting for mouse motion during the update.  */
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      display_info->mouse_face_defer = 1;
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      /* If F needs to be redrawn, simply forget about any prior mouse
	 highlighting.  */
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      if (FRAME_GARBAGED_P (f))
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	display_info->mouse_face_window = Qnil;

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#if 0 /* Rows in a current matrix containing glyphs in mouse-face have
	 their mouse_face_p flag set, which means that they are always
	 unequal to rows in a desired matrix which never have that
	 flag set.  So, rows containing mouse-face glyphs are never
	 scrolled, and we don't have to switch the mouse highlight off
	 here to prevent it from being scrolled.  */
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      /* Can we tell that this update does not affect the window
	 where the mouse highlight is?  If so, no need to turn off.
	 Likewise, don't do anything if the frame is garbaged;
	 in that case, the frame's current matrix that we would use
	 is all wrong, and we will redisplay that line anyway.  */
      if (!NILP (display_info->mouse_face_window)
	  && w == XWINDOW (display_info->mouse_face_window))
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	{
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	  int i;
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          for (i = 0; i < w->desired_matrix->nrows; ++i)
	    if (MATRIX_ROW_ENABLED_P (w->desired_matrix, i))
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	      break;

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	  if (i < w->desired_matrix->nrows)
	    clear_mouse_face (display_info);
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	}
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#endif /* 0 */
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    }

  UNBLOCK_INPUT;
}

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/* Draw a vertical window border from (x,y0) to (x,y1)  */
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static void
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w32_draw_vertical_window_border (w, x, y0, y1)
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     struct window *w;
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     int x, y0, y1;
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{
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  struct frame *f = XFRAME (WINDOW_FRAME (w));
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  RECT r;
  HDC hdc;
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  struct face *face;
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  r.left = x;
  r.right = x + 1;
  r.top = y0;
  r.bottom = y1;
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  hdc = get_frame_dc (f);
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  face = FACE_FROM_ID (f, VERTICAL_BORDER_FACE_ID);
  if (face)
    w32_fill_rect (f, hdc, face->foreground, &r);
  else
    w32_fill_rect (f, hdc, FRAME_FOREGROUND_PIXEL (f), &r);

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  release_frame_dc (f, hdc);
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}
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/* End update of window W (which is equal to updated_window).

   Draw vertical borders between horizontally adjacent windows, and
   display W's cursor if CURSOR_ON_P is non-zero.

   MOUSE_FACE_OVERWRITTEN_P non-zero means that some row containing
   glyphs in mouse-face were overwritten.  In that case we have to
   make sure that the mouse-highlight is properly redrawn.

   W may be a menu bar pseudo-window in case we don't have X toolkit
   support. Such windows don't have a cursor, so don't display it
   here. */
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static void
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x_update_window_end (w, cursor_on_p, mouse_face_overwritten_p)
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     struct window *w;
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     int cursor_on_p, mouse_face_overwritten_p;
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{
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  struct w32_display_info *dpyinfo = FRAME_W32_DISPLAY_INFO (XFRAME (w->frame));
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  if (!w->pseudo_window_p)
    {
      BLOCK_INPUT;
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      if (cursor_on_p)
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	display_and_set_cursor (w, 1, output_cursor.hpos,
				output_cursor.vpos,
				output_cursor.x, output_cursor.y);
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      if (draw_window_fringes (w, 1))
	x_draw_vertical_border (w);
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      UNBLOCK_INPUT;
    }
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  /* If a row with mouse-face was overwritten, arrange for
     XTframe_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
    {
      dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
      dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
      dpyinfo->mouse_face_window = Qnil;
    }

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  /* Unhide the caret.  This won't actually show the cursor, unless it
     was visible before the corresponding call to HideCaret in
     x_update_window_begin.  */
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  if (w32_use_visible_system_caret && w32_system_caret_hwnd)
    {
      SendMessage (w32_system_caret_hwnd, WM_EMACS_SHOW_CARET, 0, 0);
    }
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  updated_window = NULL;
}

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/* End update of frame F.  This function is installed as a hook in
   update_end.  */

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static void
x_update_end (f)
     struct frame *f;
{
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  if (! FRAME_W32_P (f))
    return;

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  /* Mouse highlight may be displayed again.  */
  FRAME_W32_DISPLAY_INFO (f)->mouse_face_defer = 0;
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}

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/* This function is called from various places in xdisp.c whenever a
   complete update has been performed.  The global variable
   updated_window is not available here.  */
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static void
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w32_frame_up_to_date (f)
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     struct frame *f;
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{
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  if (FRAME_W32_P (f))
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    {
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      struct w32_display_info *dpyinfo = FRAME_W32_DISPLAY_INFO (f);
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      if (dpyinfo->mouse_face_deferred_gc
	  || f == dpyinfo->mouse_face_mouse_frame)
	{
	  BLOCK_INPUT;
	  if (dpyinfo->mouse_face_mouse_frame)
	    note_mouse_highlight (dpyinfo->mouse_face_mouse_frame,
				  dpyinfo->mouse_face_mouse_x,
				  dpyinfo->mouse_face_mouse_y);
	  dpyinfo->mouse_face_deferred_gc = 0;
	  UNBLOCK_INPUT;
	}
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    }
}
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/* Draw truncation mark bitmaps, continuation mark bitmaps, overlay
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   arrow bitmaps, or clear the fringes if no bitmaps are required
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   before DESIRED_ROW is made current.  The window being updated is
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   found in updated_window.  This function is called from
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   update_window_line only if it is known that there are differences
   between bitmaps to be drawn between current row and DESIRED_ROW.  */

static void
x_after_update_window_line (desired_row)
     struct glyph_row *desired_row;
{
  struct window *w = updated_window;
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  struct frame *f;
  int width, height;

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  xassert (w);
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  if (!desired_row->mode_line_p && !w->pseudo_window_p)
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    desired_row->redraw_fringe_bitmaps_p = 1;
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  /* When a window has disappeared, make sure that no rest of
     full-width rows stays visible in the internal border.  Could
     check here if updated_window is the leftmost/rightmost window,
     but I guess it's not worth doing since vertically split windows
     are almost never used, internal border is rarely set, and the
     overhead is very small.  */
  if (windows_or_buffers_changed
      && desired_row->full_width_p
      && (f = XFRAME (w->frame),
	  width = FRAME_INTERNAL_BORDER_WIDTH (f),
	  width != 0)
      && (height = desired_row->visible_height,
	  height > 0))
    {
      int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
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      /* Internal border is drawn below the tool bar.  */
      if (WINDOWP (f->tool_bar_window)
	  && w == XWINDOW (f->tool_bar_window))
	y -= width;

      BLOCK_INPUT;
      {
	HDC hdc = get_frame_dc (f);
	w32_clear_area (f, hdc, 0, y, width, height);
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	w32_clear_area (f, hdc, FRAME_PIXEL_WIDTH (f) - width,
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			y, width, height);
	release_frame_dc (f, hdc);
      }
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      UNBLOCK_INPUT;
    }
}


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/* Draw the bitmap WHICH in one of the left or right fringes of
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   window W.  ROW is the glyph row for which to display the bitmap; it
   determines the vertical position at which the bitmap has to be
   drawn.  */

static void
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w32_draw_fringe_bitmap (w, row, p)
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     struct window *w;
     struct glyph_row *row;
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     struct draw_fringe_bitmap_params *p;
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{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
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  HDC hdc;
  struct face *face = p->face;
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  int rowY;
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  hdc = get_frame_dc (f);
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  if (!p->overlay_p)
    {
      int bx = p->bx, by = p->by, nx = p->nx, ny = p->ny;

      /* If the fringe is adjacent to the left (right) scroll bar of a
	 leftmost (rightmost, respectively) window, then extend its
	 background to the gap between the fringe and the bar.  */
      if ((WINDOW_LEFTMOST_P (w)
	   && WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (w))
	  || (WINDOW_RIGHTMOST_P (w)
	      && WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_RIGHT (w)))
	{
	  int sb_width = WINDOW_CONFIG_SCROLL_BAR_WIDTH (w);

	  if (sb_width > 0)
	    {
	      int left = WINDOW_SCROLL_BAR_AREA_X (w);
	      int width = (WINDOW_CONFIG_SCROLL_BAR_COLS (w)
			   * FRAME_COLUMN_WIDTH (f));

	      if (bx < 0)
		{
		  /* Bitmap fills the fringe.  */
		  if (left + width == p->x)
		    bx = left + sb_width;
		  else if (p->x + p->wd == left)
		    bx = left;
		  if (bx >= 0)
		    {
		      int header_line_height = WINDOW_HEADER_LINE_HEIGHT (w);

		      nx = width - sb_width;
		      by = WINDOW_TO_FRAME_PIXEL_Y (w, max (header_line_height,
							    row->y));
		      ny = row->visible_height;
		    }
		}
	      else
		{
		  if (left + width == bx)
		    {
		      bx = left + sb_width;
		      nx += width - sb_width;
		    }
		  else if (bx + nx == left)
		    nx += width - sb_width;
		}
	    }
	}

      if (bx >= 0 && nx > 0)
	w32_fill_area (f, hdc, face->background, bx, by, nx, ny);
    }

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  /* Must clip because of partially visible lines.  */
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  rowY = WINDOW_TO_FRAME_PIXEL_Y (w, row->y);
  if (p->y < rowY)
    {
      /* Adjust position of "bottom aligned" bitmap on partially
	 visible last row.  */
      int oldY = row->y;
      int oldVH = row->visible_height;
      row->visible_height = p->h;
      row->y -= rowY - p->y;
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      w32_clip_to_row (w, row, -1, hdc);
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      row->y = oldY;
      row->visible_height = oldVH;
    }
  else
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    w32_clip_to_row (w, row, -1, hdc);
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  if (p->which && p->which < max_fringe_bmp)
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    {
      HBITMAP pixmap = fringe_bmp[p->which];
      HDC compat_hdc;
      HANDLE horig_obj;
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      compat_hdc = CreateCompatibleDC (hdc);
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      SaveDC (hdc);
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      horig_obj = SelectObject (compat_hdc, pixmap);
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      /* Paint overlays transparently.  */
      if (p->overlay_p)
	{
	  HBRUSH h_brush, h_orig_brush;

	  SetTextColor (hdc, BLACK_PIX_DEFAULT (f));
	  SetBkColor (hdc, WHITE_PIX_DEFAULT (f));
	  h_brush = CreateSolidBrush (face->foreground);
	  h_orig_brush = SelectObject (hdc, h_brush);

	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  DSTINVERT);
	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  0x2E064A);
	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  DSTINVERT);

	  SelectObject (hdc, h_orig_brush);
	  DeleteObject (h_brush);
	}
      else
	{
	  SetTextColor (hdc, face->background);
	  SetBkColor (hdc, (p->cursor_p
			    ? f->output_data.w32->cursor_pixel
			    : face->foreground));

	  BitBlt (hdc, p->x, p->y, p->wd, p->h,
		  compat_hdc, 0, p->dh,
		  SRCCOPY);
	}
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      SelectObject (compat_hdc, horig_obj);
      DeleteDC (compat_hdc);
      RestoreDC (hdc, -1);
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    }
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  w32_set_clip_rectangle (hdc, NULL);
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  release_frame_dc (f, hdc);
}

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static void
w32_define_fringe_bitmap (which, bits, h, wd)
     int which;
     unsigned short *bits;
     int h, wd;
{
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  if (which >= max_fringe_bmp)
    {
      int i = max_fringe_bmp;
      max_fringe_bmp = which + 20;
      fringe_bmp = (HBITMAP *) xrealloc (fringe_bmp, max_fringe_bmp * sizeof (HBITMAP));
      while (i < max_fringe_bmp)
	fringe_bmp[i++] = 0;
    }

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  fringe_bmp[which] = CreateBitmap (wd, h, 1, 1, bits);
}

static void
w32_destroy_fringe_bitmap (which)
     int which;
{
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  if (which >= max_fringe_bmp)
    return;

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  if (fringe_bmp[which])
    DeleteObject (fringe_bmp[which]);
  fringe_bmp[which] = 0;
}


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/* This is called when starting Emacs and when restarting after
   suspend.  When starting Emacs, no window is mapped.  And nothing
   must be done to Emacs's own window if it is suspended (though that
   rarely happens).  */
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static void
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w32_set_terminal_modes (struct terminal *term)
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{
}

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/* This is called when exiting or suspending Emacs. Exiting will make
   the W32 windows go away, and suspending requires no action. */
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static void
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w32_reset_terminal_modes (struct terminal *term)
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{
}
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888

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/***********************************************************************
			   Display Iterator
 ***********************************************************************/

/* Function prototypes of this page.  */

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#if OLD_FONT

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XCharStruct *w32_per_char_metric P_ ((XFontStruct *, wchar_t *, int));
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static int w32_encode_char P_ ((int, wchar_t *, struct font_info *,
				struct charset *, int *));
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/* Get metrics of character CHAR2B in FONT.  Value is always non-null.
   If CHAR2B is not contained in FONT, the font's default character
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   metric is returned. */
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static int
w32_bdf_per_char_metric (font, char2b, dim, pcm)
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     XFontStruct *font;
     wchar_t *char2b;
     int dim;
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     XCharStruct * pcm;
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{
  glyph_metric * bdf_metric;
  char buf[2];

  if (dim == 1)
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    buf[0] = (char)(*char2b);
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  else
    {
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      buf[0] = XCHAR2B_BYTE1 (char2b);
      buf[1] = XCHAR2B_BYTE2 (char2b);
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    }

  bdf_metric = w32_BDF_TextMetric (font->bdf, buf, dim);

  if (bdf_metric)
    {
      pcm->width = bdf_metric->dwidth;
      pcm->lbearing = bdf_metric->bbox;
      pcm->rbearing = bdf_metric->dwidth
                    - (bdf_metric->bbox + bdf_metric->bbw);
      pcm->ascent = bdf_metric->bboy + bdf_metric->bbh;
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      pcm->descent = -bdf_metric->bboy;
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      return 1;
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    }
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  return 0;
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}


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static int
w32_native_per_char_metric (font, char2b, font_type, pcm)
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     XFontStruct *font;
     wchar_t *char2b;
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     enum w32_char_font_type font_type;
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     XCharStruct * pcm;
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{
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  HDC hdc = GetDC (NULL);
  HFONT old_font;
  BOOL retval = FALSE;
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  xassert (font && char2b);
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  xassert (font->hfont);
  xassert (font_type == UNICODE_FONT || font_type == ANSI_FONT);
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  old_font = SelectObject (hdc, font->hfont);
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  if ((font->tm.tmPitchAndFamily & TMPF_TRUETYPE) != 0)
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    {
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      ABC char_widths;

      if (font_type == UNICODE_FONT)
	retval = GetCharABCWidthsW (hdc, *char2b, *char2b, &char_widths);
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      else
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	retval = GetCharABCWidthsA (hdc, *char2b, *char2b, &char_widths);

      if (retval)
	{
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#if 0
	  /* Disabled until we can find a way to get the right results
	     on all versions of Windows.  */

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	  /* Don't trust the ABC widths.  For synthesized fonts they are
	     wrong, and so is the result of GetCharWidth()!  */
	  int real_width;
	  GetCharWidth (hdc, *char2b, *char2b, &real_width);
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#endif
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	  if (cleartype_active)
	    {
	      /* Cleartype antialiasing causes characters to overhang
		 by a pixel on each side compared with what GetCharABCWidths
		 reports.  */
	      char_widths.abcA -= 1;
	      char_widths.abcC -= 1;
	      char_widths.abcB += 2;
	    }

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	  pcm->width = char_widths.abcA + char_widths.abcB + char_widths.abcC;
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#if 0
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	  /* As far as I can tell, this is the best way to determine what
	     ExtTextOut will do with the broken font.  */
	  if (pcm->width != real_width)
	    pcm->width = (pcm->width + real_width) / 2;
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#endif
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	  pcm->lbearing = char_widths.abcA;
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	  pcm->rbearing = char_widths.abcA + char_widths.abcB;
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	  pcm->ascent = FONT_BASE (font);
	  pcm->descent = FONT_DESCENT (font);
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	}
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    }
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  if (!retval)
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    {
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      /* Either font is not a True-type font, or GetCharABCWidthsW
	 failed (it is not supported on Windows 9x for instance), so we
	 can't determine the full info we would like.  All is not lost
	 though - we can call GetTextExtentPoint32 to get rbearing and
	 deduce width based on the font's per-string overhang.  lbearing
	 is assumed to be zero.  */
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      /* TODO: Some Thai characters (and other composites if Windows
         supports them) do have lbearing, and report their total width
         as zero. Need some way of handling them when
         GetCharABCWidthsW fails. */
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      SIZE sz;

      if (font_type == UNICODE_FONT)
	retval = GetTextExtentPoint32W (hdc, char2b, 1, &sz);
      else
	retval = GetTextExtentPoint32A (hdc, (char*)char2b, 1, &sz);
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      if (retval)
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	{
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	  pcm->width = sz.cx;
	  pcm->rbearing = sz.cx + font->tm.tmOverhang;
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	  pcm->lbearing = 0;
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	  pcm->ascent = FONT_BASE (font);
	  pcm->descent = FONT_DESCENT (font);
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	}
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    }


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  if (pcm->width == 0 && (pcm->rbearing - pcm->lbearing) == 0)
    {
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      retval = FALSE;
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    }

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  SelectObject (hdc, old_font);
  ReleaseDC (NULL, hdc);

  return retval;
}


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XCharStruct *
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w32_per_char_metric (font, char2b, font_type)
     XFontStruct *font;
     wchar_t *char2b;
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     int /* enum w32_char_font_type */ font_type;
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{
  /* The result metric information.  */
  XCharStruct *pcm;
  BOOL retval;

  xassert (font && char2b);
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  /* TODO: This function is currently called through the RIF, and in
     some cases font_type is UNKNOWN_FONT. We currently allow the
     cached metrics to be used, which seems to work, but in cases
     where font_type is UNKNOWN_FONT, we probably haven't encoded
     char2b appropriately. All callers need checking to see what they
     are passing.  This is most likely to affect variable width fonts
     outside the Latin-1 range, particularly in languages like Thai
     that rely on rbearing and lbearing to provide composition. I
     don't think that is working currently anyway, but we don't seem
     to have anyone testing such languages on Windows.  */
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  /* Handle the common cases quickly.  */
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  if (!font->bdf && font->per_char == NULL)
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    /* TODO: determine whether char2b exists in font?  */
    return &font->max_bounds;
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  else if (!font->bdf && *char2b < 128)
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    return &font->per_char[*char2b];

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  xassert (font_type != UNKNOWN_FONT);

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  pcm = &font->scratch;

  if (font_type == BDF_1D_FONT)
    retval = w32_bdf_per_char_metric (font, char2b, 1, pcm);
  else if (font_type == BDF_2D_FONT)
    retval = w32_bdf_per_char_metric (font, char2b, 2, pcm);
  else
    retval = w32_native_per_char_metric (font, char2b, font_type, pcm);

  if (retval)
    return pcm;

  return NULL;
}

void
w32_cache_char_metrics (font)
     XFontStruct *font;
{
  wchar_t char2b = L'x';

  /* Cache char metrics for the common cases.  */
  if (font->bdf)
    {
      /* TODO: determine whether font is fixed-pitch.  */
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      if (!w32_bdf_per_char_metric (font, &char2b, 1, &font->max_bounds))
        {
          /* Use the font width and height as max bounds, as not all BDF
             fonts contain the letter 'x'. */
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          font->max_bounds.width = FONT_WIDTH (font);
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          font->max_bounds.lbearing = -font->bdf->llx;
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          font->max_bounds.rbearing = FONT_WIDTH (font) - font->bdf->urx;
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          font->max_bounds.ascent = FONT_BASE (font);
          font->max_bounds.descent = FONT_DESCENT (font);
        }
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    }
  else
    {
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      if (((font->tm.tmPitchAndFamily & TMPF_FIXED_PITCH) != 0)
          /* Some fonts (eg DBCS fonts) are marked as fixed width even
             though they contain characters of different widths. */
          || (font->tm.tmMaxCharWidth != font->tm.tmAveCharWidth))
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	{
	  /* Font is not fixed pitch, so cache per_char info for the
             ASCII characters.  It would be much more work, and probably
             not worth it, to cache other chars, since we may change
             between using Unicode and ANSI text drawing functions at
             run-time.  */
	  int i;

	  font->per_char = xmalloc (128 * sizeof(XCharStruct));
	  for (i = 0; i < 128; i++)
	    {
	      char2b = i;
	      w32_native_per_char_metric (font, &char2b, ANSI_FONT,
					  &font->per_char[i]);
	    }
	}
      else
	w32_native_per_char_metric (font, &char2b, ANSI_FONT,
				    &font->max_bounds);
    }
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}

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/* Determine if a font is double byte. */
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static int
w32_font_is_double_byte (XFontStruct *font)
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{
  return font->double_byte_p;
}


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static BOOL
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w32_use_unicode_for_codepage (codepage)
     int codepage;
{
  /* If the current codepage is supported, use Unicode for output. */
  return (w32_enable_unicode_output
          && codepage != CP_8BIT
          && (codepage == CP_UNICODE || IsValidCodePage (codepage)));
}

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/* Encode CHAR2B using encoding information from FONT_INFO.  CHAR2B is
   the two-byte form of C.  Encoding is returned in *CHAR2B.  */

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static int /* enum w32_char_font_type */
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w32_encode_char (c, char2b, font_info, charset, two_byte_p)
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     int c;
     wchar_t *char2b;
     struct font_info *font_info;
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     struct charset *charset;
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     int * two_byte_p;
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{
  int codepage;
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  int unicode_p = 0;
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  int internal_two_byte_p = 0;
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  XFontStruct *font = font_info->font;

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  internal_two_byte_p = w32_font_is_double_byte (font);
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  codepage = font_info->codepage;

  /* If font can output unicode, use the original unicode character.  */
  if ( font && !font->bdf && w32_use_unicode_for_codepage (codepage)
       && c >= 0x100)
    {
      *char2b = c;
      unicode_p = 1;
      internal_two_byte_p = 1;
    }
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  /* FONT_INFO may define a scheme by which to encode byte1 and byte2.
     This may be either a program in a special encoder language or a
     fixed encoding.  */
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  else if (font_info->font_encoder)
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    {
      /* It's a program.  */
      struct ccl_program *ccl = font_info->font_encoder;

      if (CHARSET_DIMENSION (charset) == 1)
	{
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	  ccl->reg[0] = CHARSET_ID (charset);
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	  ccl->reg[1] = XCHAR2B_BYTE2 (char2b);
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	  ccl->reg[2] = -1;
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	}
      else
	{
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	  ccl->reg[0] = CHARSET_ID (charset);
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	  ccl->reg[1] = XCHAR2B_BYTE1 (char2b);
	  ccl->reg[2] = XCHAR2B_BYTE2 (char2b);
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	}

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