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/* Implementation of GUI terminal on the Mac OS.
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   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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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 2, 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; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

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/* Contributed by Andrew Choi (akochoi@mac.com).  */
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#include <config.h>
#include <signal.h>
#include <stdio.h>
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#include <stdlib.h>
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#include "lisp.h"
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#include "charset.h"
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#include "blockinput.h"

#include "macterm.h"

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#ifndef MAC_OSX
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#include <alloca.h>
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#endif
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#if TARGET_API_MAC_CARBON
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/* USE_CARBON_EVENTS determines if the Carbon Event Manager is used to
   obtain events from the event queue.  If set to 0, WaitNextEvent is
   used instead.  */
#define USE_CARBON_EVENTS 1
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#else /* not TARGET_API_MAC_CARBON */
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#include <Quickdraw.h>
#include <ToolUtils.h>
#include <Sound.h>
#include <Events.h>
#include <Script.h>
#include <Resources.h>
#include <Fonts.h>
#include <TextUtils.h>
#include <LowMem.h>
#include <Controls.h>
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#include <Windows.h>
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#if defined (__MRC__) || (__MSL__ >= 0x6000)
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#include <ControlDefinitions.h>
#endif

#if __profile__
#include <profiler.h>
#endif
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#endif /* not TARGET_API_MAC_CARBON */
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#include "systty.h"
#include "systime.h"
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#include "atimer.h"
#include "keymap.h"
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#include <ctype.h>
#include <errno.h>
#include <setjmp.h>
#include <sys/stat.h>
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#include <sys/param.h>
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#include "keyboard.h"
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#include "frame.h"
#include "dispextern.h"
#include "fontset.h"
#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"
#include "gnu.h"
#include "disptab.h"
#include "buffer.h"
#include "window.h"
#include "intervals.h"
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#include "composite.h"
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#include "coding.h"

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/* Set of macros that handle mapping of Mac modifier keys to emacs.  */
#define macCtrlKey     (NILP (Vmac_reverse_ctrl_meta) ? controlKey :	\
			(NILP (Vmac_command_key_is_meta) ? optionKey : cmdKey))
#define macShiftKey    (shiftKey)
#define macMetaKey     (NILP (Vmac_reverse_ctrl_meta) ?			\
			(NILP (Vmac_command_key_is_meta) ? optionKey : cmdKey) \
			: controlKey)
#define macAltKey      (NILP (Vmac_command_key_is_meta) ? cmdKey : optionKey)

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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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/* If Non-nil, the text will be rendered using Core Graphics text rendering which may anti-alias the text.  */
Lisp_Object Vmac_use_core_graphics;


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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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/* Non-zero means autoselect window with the mouse cursor.  */

int x_autoselect_window_p;

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/* Non-zero means make use of UNDERLINE_POSITION font properties.  */

int x_use_underline_position_properties;

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/* Non-zero means draw block and hollow cursor as wide as the glyph
   under it.  For example, if a block cursor is over a tab, it will be
   drawn as wide as that tab on the display.  */

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/* This is a chain of structures for all the X displays currently in
   use.  */

struct x_display_info *x_display_list;

/* This is a list of cons cells, each of the form (NAME
   . FONT-LIST-CACHE), one for each element of x_display_list and in
   the same order.  NAME is the name of the frame.  FONT-LIST-CACHE
   records previous values returned by x-list-fonts.  */

Lisp_Object x_display_name_list;

/* This is display since Mac does not support multiple ones.  */
struct mac_display_info one_mac_display_info;

/* Frame being updated by update_frame.  This is declared in term.c.
   This is set by update_begin and looked at by all the XT functions.
   It is zero while not inside an update.  In that case, the XT
   functions assume that `selected_frame' is the frame to apply to.  */

extern struct frame *updating_frame;

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extern int waiting_for_input;

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/* This is a frame waiting to be auto-raised, within XTread_socket.  */

struct frame *pending_autoraise_frame;

/* Non-zero means user is interacting with a toolkit scroll bar.  */

static int toolkit_scroll_bar_interaction;

/* Mouse movement.

   Formerly, we used PointerMotionHintMask (in standard_event_mask)
   so that we would have to call XQueryPointer after each MotionNotify
   event to ask for another such event.  However, this made mouse tracking
   slow, and there was a bug that made it eventually stop.

   Simply asking for MotionNotify all the time seems to work better.

   In order to avoid asking for motion events and then throwing most
   of them away or busy-polling the server for mouse positions, we ask
   the server for pointer motion hints.  This means that we get only
   one event per group of mouse movements.  "Groups" are delimited by
   other kinds of events (focus changes and button clicks, for
   example), or by XQueryPointer calls; when one of these happens, we
   get another MotionNotify event the next time the mouse moves.  This
   is at least as efficient as getting motion events when mouse
   tracking is on, and I suspect only negligibly worse when tracking
   is off.  */

/* Where the mouse was last time we reported a mouse event.  */

static Rect last_mouse_glyph;
static Lisp_Object last_mouse_press_frame;

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

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

   If the last X motion event didn't occur in a scroll bar, we set
   this to Qnil, to tell XTmouse_position to return an ordinary motion
   event.  */

static Lisp_Object last_mouse_scroll_bar;

/* This is a hack.  We would really prefer that XTmouse_position would
   return the time associated with the position it returns, but there
   doesn't seem to be any way to wrest the time-stamp from the server
   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.  */

static Time last_mouse_movement_time;

struct scroll_bar *tracked_scroll_bar = NULL;

/* Incremented by XTread_socket whenever it really tries to read
   events.  */

#ifdef __STDC__
static int volatile input_signal_count;
#else
static int input_signal_count;
#endif

/* Used locally within XTread_socket.  */

static int x_noop_count;

/* Initial values of argv and argc.  */

extern char **initial_argv;
extern int initial_argc;

extern Lisp_Object Vcommand_line_args, Vsystem_name;

/* Tells if a window manager is present or not.  */

extern Lisp_Object Vx_no_window_manager;

extern int errno;

/* A mask of extra modifier bits to put into every keyboard char.  */

extern int extra_keyboard_modifiers;

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/* The keysyms to use for the various modifiers.  */

static Lisp_Object Qalt, Qhyper, Qsuper, Qmodifier_value;

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static Lisp_Object Qvendor_specific_keysyms;

#if 0
extern XrmDatabase x_load_resources P_ ((Display *, char *, char *, char *));
#endif

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extern int inhibit_window_system;
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#if __MRC__ && !TARGET_API_MAC_CARBON
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QDGlobals qd;  /* QuickDraw global information structure.  */
#endif


struct frame * x_window_to_frame (struct mac_display_info *, WindowPtr);
struct mac_display_info *mac_display_info_for_display (Display *);
static void x_update_window_end P_ ((struct window *, int, int));
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static void mac_handle_tool_bar_click P_ ((struct frame *, EventRecord *));
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static int x_io_error_quitter P_ ((Display *));
int x_catch_errors P_ ((Display *));
void x_uncatch_errors P_ ((Display *, int));
void x_lower_frame P_ ((struct frame *));
void x_scroll_bar_clear P_ ((struct frame *));
int x_had_errors_p P_ ((Display *));
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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void mac_initialize P_ ((void));
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static void x_font_min_bounds P_ ((XFontStruct *, int *, int *));
static int x_compute_min_glyph_bounds P_ ((struct frame *));
static void x_update_end P_ ((struct frame *));
static void XTframe_up_to_date P_ ((struct frame *));
static void XTreassert_line_highlight P_ ((int, int));
static void x_change_line_highlight P_ ((int, int, int, int));
static void XTset_terminal_modes P_ ((void));
static void XTreset_terminal_modes P_ ((void));
static void x_clear_frame P_ ((void));
static void frame_highlight P_ ((struct frame *));
static void frame_unhighlight P_ ((struct frame *));
static void x_new_focus_frame P_ ((struct x_display_info *, struct frame *));
static void XTframe_rehighlight P_ ((struct frame *));
static void x_frame_rehighlight P_ ((struct x_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 x_clip_to_row P_ ((struct window *, struct glyph_row *, int, GC));
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static void x_flush P_ ((struct frame *f));
static void x_update_begin P_ ((struct frame *));
static void x_update_window_begin P_ ((struct window *));
static void x_after_update_window_line P_ ((struct glyph_row *));

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static int is_emacs_window (WindowPtr);

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int x_bitmap_icon (struct frame *, Lisp_Object);
void x_make_frame_visible (struct frame *);

extern void window_scroll (Lisp_Object, int, int, int);

/* Defined in macmenu.h.  */
extern void menubar_selection_callback (FRAME_PTR, int);
extern void set_frame_menubar (FRAME_PTR, int, int);

/* X display function emulation */

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void
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XFreePixmap (display, pixmap)
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     Display *display;		/* not used */
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     Pixmap pixmap;
{
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  DisposeGWorld (pixmap);
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}


/* Set foreground color for subsequent QuickDraw commands.  Assume
   graphic port has already been set.  */

static void
mac_set_forecolor (unsigned long color)
{
  RGBColor fg_color;
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  fg_color.red = RED16_FROM_ULONG (color);
  fg_color.green = GREEN16_FROM_ULONG (color);
  fg_color.blue = BLUE16_FROM_ULONG (color);
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  RGBForeColor (&fg_color);
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}


/* Set background color for subsequent QuickDraw commands.  Assume
   graphic port has already been set.  */

static void
mac_set_backcolor (unsigned long color)
{
  RGBColor bg_color;
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  bg_color.red = RED16_FROM_ULONG (color);
  bg_color.green = GREEN16_FROM_ULONG (color);
  bg_color.blue = BLUE16_FROM_ULONG (color);
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  RGBBackColor (&bg_color);
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}

/* Set foreground and background color for subsequent QuickDraw
   commands.  Assume that the graphic port has already been set.  */

static void
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mac_set_colors (gc, bg_save)
     GC gc;
     RGBColor *bg_save;
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{
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  if (bg_save)
    GetBackColor (bg_save);
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  mac_set_forecolor (gc->foreground);
  mac_set_backcolor (gc->background);
}

/* Mac version of XDrawLine.  */

static void
XDrawLine (display, w, gc, x1, y1, x2, y2)
     Display *display;
     WindowPtr w;
     GC gc;
     int x1, y1, x2, y2;
{
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  RGBColor old_bg;

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  SetPortWindowPort (w);
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  mac_set_colors (gc, &old_bg);
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  MoveTo (x1, y1);
  LineTo (x2, y2);
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  RGBBackColor (&old_bg);
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}

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void
mac_draw_line_to_pixmap (display, p, gc, x1, y1, x2, y2)
     Display *display;
     Pixmap p;
     GC gc;
     int x1, y1, x2, y2;
{
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  CGrafPtr old_port;
  GDHandle old_gdh;

  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (p, NULL);

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  mac_set_colors (gc, NULL);
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  LockPixels (GetGWorldPixMap (p));
  MoveTo (x1, y1);
  LineTo (x2, y2);
  UnlockPixels (GetGWorldPixMap (p));
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  SetGWorld (old_port, old_gdh);
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}

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/* Mac version of XClearArea.  */

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void
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XClearArea (display, w, x, y, width, height, exposures)
     Display *display;
     WindowPtr w;
     int x, y;
     unsigned int width, height;
     int exposures;
{
  struct mac_output *mwp = (mac_output *) GetWRefCon (w);
  Rect r;
  XGCValues xgc;
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  RGBColor old_bg;
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  xgc.foreground = mwp->x_compatible.foreground_pixel;
  xgc.background = mwp->x_compatible.background_pixel;
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  SetPortWindowPort (w);
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  mac_set_colors (&xgc, &old_bg);
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  SetRect (&r, x, y, x + width, y + height);

  EraseRect (&r);
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  RGBBackColor (&old_bg);
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}

/* Mac version of XClearWindow.  */

static void
XClearWindow (display, w)
     Display *display;
     WindowPtr w;
{
  struct mac_output *mwp = (mac_output *) GetWRefCon (w);
  XGCValues xgc;

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  xgc.foreground = mwp->x_compatible.foreground_pixel;
  xgc.background = mwp->x_compatible.background_pixel;
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  SetPortWindowPort (w);
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  mac_set_colors (&xgc, NULL);
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#if TARGET_API_MAC_CARBON
  {
    Rect r;
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    GetWindowPortBounds (w, &r);
    EraseRect (&r);
  }
#else /* not TARGET_API_MAC_CARBON */
  EraseRect (&(w->portRect));
#endif /* not TARGET_API_MAC_CARBON */
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}


/* Mac replacement for XCopyArea.  */

static void
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mac_draw_bitmap (display, w, gc, x, y, width, height, bits, overlay_p)
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     Display *display;
     WindowPtr w;
     GC gc;
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     int x, y, width, height;
     unsigned short *bits;
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     int overlay_p;
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{
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  BitMap bitmap;
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  Rect r;
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  RGBColor old_bg;
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  bitmap.rowBytes = sizeof(unsigned short);
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  bitmap.baseAddr = (char *)bits;
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  SetRect (&(bitmap.bounds), 0, 0, width, height);

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  SetPortWindowPort (w);
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  mac_set_colors (gc, &old_bg);
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  SetRect (&r, x, y, x + width, y + height);
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#if TARGET_API_MAC_CARBON
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  LockPortBits (GetWindowPort (w));
  CopyBits (&bitmap, GetPortBitMapForCopyBits (GetWindowPort (w)),
	    &(bitmap.bounds), &r, overlay_p ? srcOr : srcCopy, 0);
  UnlockPortBits (GetWindowPort (w));
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#else /* not TARGET_API_MAC_CARBON */
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  CopyBits (&bitmap, &(w->portBits), &(bitmap.bounds), &r,
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	    overlay_p ? srcOr : srcCopy, 0);
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#endif /* not TARGET_API_MAC_CARBON */
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  RGBBackColor (&old_bg);
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}


/* Mac replacement for XSetClipRectangles.  */

static void
mac_set_clip_rectangle (display, w, r)
     Display *display;
     WindowPtr w;
     Rect *r;
{
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  SetPortWindowPort (w);
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  ClipRect (r);
}


/* Mac replacement for XSetClipMask.  */

static void
mac_reset_clipping (display, w)
     Display *display;
     WindowPtr w;
{
  Rect r;
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  SetPortWindowPort (w);
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  SetRect (&r, -32767, -32767, 32767, 32767);
  ClipRect (&r);
}


/* Mac replacement for XCreateBitmapFromBitmapData.  */

static void
mac_create_bitmap_from_bitmap_data (bitmap, bits, w, h)
     BitMap *bitmap;
     char *bits;
     int w, h;
{
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  static unsigned char swap_nibble[16]
    = { 0x0, 0x8, 0x4, 0xc,    /* 0000 1000 0100 1100 */
	0x2, 0xa, 0x6, 0xe,    /* 0010 1010 0110 1110 */
	0x1, 0x9, 0x5, 0xd,    /* 0001 1001 0101 1101 */
	0x3, 0xb, 0x7, 0xf };  /* 0011 1011 0111 1111 */
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  int i, j, w1;
  char *p;
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  w1 = (w + 7) / 8;         /* nb of 8bits elt in X bitmap */
  bitmap->rowBytes = ((w + 15) / 16) * 2; /* nb of 16bits elt in Mac bitmap */
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  bitmap->baseAddr = xmalloc (bitmap->rowBytes * h);
  bzero (bitmap->baseAddr, bitmap->rowBytes * h);
  for (i = 0; i < h; i++)
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    {
      p = bitmap->baseAddr + i * bitmap->rowBytes;
      for (j = 0; j < w1; j++)
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	{
	  /* Bitswap XBM bytes to match how Mac does things.  */
	  unsigned char c = *bits++;
	  *p++ = (unsigned char)((swap_nibble[c & 0xf] << 4)
				 | (swap_nibble[(c>>4) & 0xf]));;
	}
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    }
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  SetRect (&(bitmap->bounds), 0, 0, w, h);
}


static void
mac_free_bitmap (bitmap)
     BitMap *bitmap;
{
  xfree (bitmap->baseAddr);
}

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Pixmap
XCreatePixmap (display, w, width, height, depth)
     Display *display;		/* not used */
     WindowPtr w;
     unsigned int width, height;
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     unsigned int depth;
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{
  Pixmap pixmap;
  Rect r;
  QDErr err;

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  SetPortWindowPort (w);
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  SetRect (&r, 0, 0, width, height);
  err = NewGWorld (&pixmap, depth, &r, NULL, NULL, 0);
  if (err != noErr)
    return NULL;
  return pixmap;
}


Pixmap
XCreatePixmapFromBitmapData (display, w, data, width, height, fg, bg, depth)
     Display *display;		/* not used */
     WindowPtr w;
     char *data;
     unsigned int width, height;
     unsigned long fg, bg;
     unsigned int depth;	/* not used */
{
  Pixmap pixmap;
  BitMap bitmap;
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  pixmap = XCreatePixmap (display, w, width, height, depth);
  if (pixmap == NULL)
    return NULL;

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  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (pixmap, NULL);
  mac_create_bitmap_from_bitmap_data (&bitmap, data, width, height);
  mac_set_forecolor (fg);
  mac_set_backcolor (bg);
  LockPixels (GetGWorldPixMap (pixmap));
#if TARGET_API_MAC_CARBON
  CopyBits (&bitmap, GetPortBitMapForCopyBits (pixmap),
	    &bitmap.bounds, &bitmap.bounds, srcCopy, 0);
#else /* not TARGET_API_MAC_CARBON */
  CopyBits (&bitmap, &(((GrafPtr)pixmap)->portBits),
	    &bitmap.bounds, &bitmap.bounds, srcCopy, 0);
#endif /* not TARGET_API_MAC_CARBON */
  UnlockPixels (GetGWorldPixMap (pixmap));
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  SetGWorld (old_port, old_gdh);
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  mac_free_bitmap (&bitmap);

  return pixmap;
}


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/* Mac replacement for XFillRectangle.  */

static void
XFillRectangle (display, w, gc, x, y, width, height)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     unsigned int width, height;
{
  Rect r;
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  RGBColor old_bg;
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  SetPortWindowPort (w);
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  mac_set_colors (gc, &old_bg);
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  SetRect (&r, x, y, x + width, y + height);

  PaintRect (&r); /* using foreground color of gc */
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  RGBBackColor (&old_bg);
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}


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#if 0 /* TODO: figure out if we need to do this on Mac.  */
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static void
mac_fill_rectangle_to_pixmap (display, p, gc, x, y, width, height)
     Display *display;
     Pixmap p;
     GC gc;
     int x, y;
     unsigned int width, height;
{
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  Rect r;

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  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (p, NULL);
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  mac_set_colors (gc, NULL);
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  SetRect (&r, x, y, x + width, y + height);

  LockPixels (GetGWorldPixMap (p));
  PaintRect (&r); /* using foreground color of gc */
  UnlockPixels (GetGWorldPixMap (p));
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  SetGWorld (old_port, old_gdh);
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}
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#endif
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/* Mac replacement for XDrawRectangle: dest is a window.  */

static void
mac_draw_rectangle (display, w, gc, x, y, width, height)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     unsigned int width, height;
{
  Rect r;
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  RGBColor old_bg;
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  SetPortWindowPort (w);
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  mac_set_colors (gc, &old_bg);
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  SetRect (&r, x, y, x + width + 1, y + height + 1);

  FrameRect (&r); /* using foreground color of gc */
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  RGBBackColor (&old_bg);
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}


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#if 0 /* TODO: figure out if we need to do this on Mac.  */
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/* Mac replacement for XDrawRectangle: dest is a Pixmap.  */

static void
mac_draw_rectangle_to_pixmap (display, p, gc, x, y, width, height)
     Display *display;
     Pixmap p;
     GC gc;
     int x, y;
     unsigned int width, height;
{
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  Rect r;

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  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (p, NULL);
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  mac_set_colors (gc, NULL);
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  SetRect (&r, x, y, x + width + 1, y + height + 1);
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  LockPixels (GetGWorldPixMap (p));
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  FrameRect (&r); /* using foreground color of gc */
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  UnlockPixels (GetGWorldPixMap (p));
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  SetGWorld (old_port, old_gdh);
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}
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#endif
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static void
mac_draw_string_common (display, w, gc, x, y, buf, nchars, mode,
			bytes_per_char)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     char *buf;
     int nchars, mode, bytes_per_char;
{
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  RGBColor old_bg;

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  SetPortWindowPort (w);
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1020
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  UInt32 textFlags, savedFlags;
  if (!NILP(Vmac_use_core_graphics)) {
    textFlags = kQDUseCGTextRendering;
    savedFlags = SwapQDTextFlags(textFlags);
  }
#endif
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  mac_set_colors (gc, &old_bg);
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  TextFont (gc->font->mac_fontnum);
  TextSize (gc->font->mac_fontsize);
  TextFace (gc->font->mac_fontface);
  TextMode (mode);

  MoveTo (x, y);
  DrawText (buf, 0, nchars * bytes_per_char);
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  RGBBackColor (&old_bg);
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1020
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  if (!NILP(Vmac_use_core_graphics))
    SwapQDTextFlags(savedFlags);
#endif
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}


/* Mac replacement for XDrawString.  */

static void
XDrawString (display, w, gc, x, y, buf, nchars)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     char *buf;
     int nchars;
{
  mac_draw_string_common (display, w, gc, x, y, buf, nchars, srcOr, 1);
}


/* Mac replacement for XDrawString16. */

static void
XDrawString16 (display, w, gc, x, y, buf, nchars)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     XChar2b *buf;
     int nchars;
{
  mac_draw_string_common (display, w, gc, x, y, (char *) buf, nchars, srcOr,
			  2);
}


/* Mac replacement for XDrawImageString.  */

static void
XDrawImageString (display, w, gc, x, y, buf, nchars)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     char *buf;
     int nchars;
{
  mac_draw_string_common (display, w, gc, x, y, buf, nchars, srcCopy, 1);
}


/* Mac replacement for XDrawString16.  */

static void
XDrawImageString16 (display, w, gc, x, y, buf, nchars)
     Display *display;
     WindowPtr w;
     GC gc;
     int x, y;
     XChar2b *buf;
     int nchars;
{
  mac_draw_string_common (display, w, gc, x, y, (char *) buf, nchars, srcCopy,
			  2);
}


/* Mac replacement for XCopyArea: dest must be window.  */

static void
mac_copy_area (display, src, dest, gc, src_x, src_y, width, height, dest_x,
	       dest_y)
     Display *display;
     Pixmap src;
     WindowPtr dest;
     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y;
{
  Rect src_r, dest_r;

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  SetPortWindowPort (dest);
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  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
  SetRect (&dest_r, dest_x, dest_y, dest_x + width, dest_y + height);

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  ForeColor (blackColor);
  BackColor (whiteColor);

  LockPixels (GetGWorldPixMap (src));
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#if TARGET_API_MAC_CARBON
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  LockPortBits (GetWindowPort (dest));
  CopyBits (GetPortBitMapForCopyBits (src),
	    GetPortBitMapForCopyBits (GetWindowPort (dest)),
	    &src_r, &dest_r, srcCopy, 0);
  UnlockPortBits (GetWindowPort (dest));
#else /* not TARGET_API_MAC_CARBON */
  CopyBits (&(((GrafPtr)src)->portBits), &(dest->portBits),
	    &src_r, &dest_r, srcCopy, 0);
#endif /* not TARGET_API_MAC_CARBON */
  UnlockPixels (GetGWorldPixMap (src));
}
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static void
mac_copy_area_with_mask (display, src, mask, dest, gc, src_x, src_y,
			 width, height, dest_x, dest_y)
     Display *display;
     Pixmap src, mask;
     WindowPtr dest;
     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y;
{
  Rect src_r, dest_r;

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  SetPortWindowPort (dest);
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  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
  SetRect (&dest_r, dest_x, dest_y, dest_x + width, dest_y + height);

  ForeColor (blackColor);
  BackColor (whiteColor);

  LockPixels (GetGWorldPixMap (src));
  LockPixels (GetGWorldPixMap (mask));
#if TARGET_API_MAC_CARBON
  LockPortBits (GetWindowPort (dest));
  CopyMask (GetPortBitMapForCopyBits (src), GetPortBitMapForCopyBits (mask),
	    GetPortBitMapForCopyBits (GetWindowPort (dest)),
	    &src_r, &src_r, &dest_r);
  UnlockPortBits (GetWindowPort (dest));
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#else /* not TARGET_API_MAC_CARBON */
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  CopyMask (&(((GrafPtr)src)->portBits), &(((GrafPtr)mask)->portBits),
	    &(dest->portBits), &src_r, &src_r, &dest_r);
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#endif /* not TARGET_API_MAC_CARBON */
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  UnlockPixels (GetGWorldPixMap (mask));
  UnlockPixels (GetGWorldPixMap (src));
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}


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#if 0
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/* Convert a pair of local coordinates to global (screen) coordinates.
   Assume graphic port has been properly set.  */
static void
local_to_global_coord (short *h, short *v)
{
  Point p;
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  p.h = *h;
  p.v = *v;
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  LocalToGlobal (&p);
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  *h = p.h;
  *v = p.v;
}
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#endif
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/* Mac replacement for XCopyArea: used only for scrolling.  */

static void
mac_scroll_area (display, w, gc, src_x, src_y, width, height, dest_x, dest_y)
     Display *display;
     WindowPtr w;
     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y;
{
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#if TARGET_API_MAC_CARBON
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  Rect src_r;
  RgnHandle dummy = NewRgn ();	/* For avoiding update events.  */
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  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
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  ScrollWindowRect (w, &src_r, dest_x - src_x, dest_y - src_y,
		    kScrollWindowNoOptions, dummy);
  DisposeRgn (dummy);
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#else /* not TARGET_API_MAC_CARBON */
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  Rect src_r, dest_r;

  SetPort (w);
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#if 0
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  mac_set_colors (gc, NULL);
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#endif
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  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
  SetRect (&dest_r, dest_x, dest_y, dest_x + width, dest_y + height);

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#if 0
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  /* Need to use global coordinates and screenBits since src and dest
     areas overlap in general.  */
  local_to_global_coord (&src_r.left, &src_r.top);
  local_to_global_coord (&src_r.right, &src_r.bottom);
  local_to_global_coord (&dest_r.left, &dest_r.top);
  local_to_global_coord (&dest_r.right, &dest_r.bottom);

  CopyBits (&qd.screenBits, &qd.screenBits, &src_r, &dest_r, srcCopy, 0);
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#else
  /* In Color QuickDraw, set ForeColor and BackColor as follows to avoid
     color mapping in CopyBits.  Otherwise, it will be slow.  */
  ForeColor (blackColor);
  BackColor (whiteColor);
  CopyBits (&(w->portBits), &(w->portBits), &src_r, &dest_r, srcCopy, 0);
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  mac_set_colors (gc, NULL);
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#endif
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#endif /* not TARGET_API_MAC_CARBON */
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}


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#if 0 /* TODO: figure out if we need to do this on Mac.  */
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/* Mac replacement for XCopyArea: dest must be Pixmap.  */

static void
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mac_copy_area_to_pixmap (display, src, dest, gc, src_x, src_y, width, height,
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                     dest_x, dest_y)
     Display *display;
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     Pixmap src, dest;
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     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y;
{
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  Rect src_r, dest_r;

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  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (dest, NULL);
  ForeColor (blackColor);
  BackColor (whiteColor);

  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
  SetRect (&dest_r, dest_x, dest_y, dest_x + width, dest_y + height);

  LockPixels (GetGWorldPixMap (src));
  LockPixels (GetGWorldPixMap (dest));
#if TARGET_API_MAC_CARBON
  CopyBits (GetPortBitMapForCopyBits (src), GetPortBitMapForCopyBits (dest),
	    &src_r, &dest_r, srcCopy, 0);
#else /* not TARGET_API_MAC_CARBON */
  CopyBits (&(((GrafPtr)src)->portBits), &(((GrafPtr)dest)->portBits),
	    &src_r, &dest_r, srcCopy, 0);
#endif /* not TARGET_API_MAC_CARBON */
  UnlockPixels (GetGWorldPixMap (dest));
  UnlockPixels (GetGWorldPixMap (src));
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  SetGWorld (old_port, old_gdh);
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}


static void
mac_copy_area_with_mask_to_pixmap (display, src, mask, dest, gc, src_x, src_y,
				   width, height, dest_x, dest_y)
     Display *display;
     Pixmap src, mask, dest;
     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y;
{
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  Rect src_r, dest_r;

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  GetGWorld (&old_port, &old_gdh);
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  SetGWorld (dest, NULL);
  ForeColor (blackColor);
  BackColor (whiteColor);
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  SetRect (&src_r, src_x, src_y, src_x + width, src_y + height);
  SetRect (&dest_r, dest_x, dest_y, dest_x + width, dest_y + height);
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  LockPixels (GetGWorldPixMap (src));
  LockPixels (GetGWorldPixMap (mask));
  LockPixels (GetGWorldPixMap (dest));
#if TARGET_API_MAC_CARBON
  CopyMask (GetPortBitMapForCopyBits (src), GetPortBitMapForCopyBits (mask),
	    GetPortBitMapForCopyBits (dest), &src_r, &src_r, &dest_r);
#else /* not TARGET_API_MAC_CARBON */
  CopyMask (&(((GrafPtr)src)->portBits), &(((GrafPtr)mask)->portBits),
	    &(((GrafPtr)dest)->portBits), &src_r, &src_r, &dest_r);
#endif /* not TARGET_API_MAC_CARBON */
  UnlockPixels (GetGWorldPixMap (dest));
  UnlockPixels (GetGWorldPixMap (mask));
  UnlockPixels (GetGWorldPixMap (src));
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  SetGWorld (old_port, old_gdh);
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}
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#endif
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/* Mac replacement for XChangeGC.  */

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


/* Mac replacement for XCreateGC.  */

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;
}


/* Used in xfaces.c.  */

void
XFreeGC (display, gc)
     Display *display;
     GC gc;
{
  xfree (gc);
}


/* Mac replacement for XGetGCValues.  */

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


/* Mac replacement for XSetForeground.  */

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void
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XSetForeground (display, gc, color)
     Display *display;
     GC gc;
     unsigned long color;
{
  gc->foreground = color;
}


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/* Mac replacement for XSetBackground.  */

void
XSetBackground (display, gc, color)
     Display *display;
     GC gc;
     unsigned long color;
{
  gc->background = color;
}


/* Mac replacement for XSetWindowBackground.  */

void
XSetWindowBackground (display, w, color)
     Display *display;
     WindowPtr w;
     unsigned long color;
{
#if !TARGET_API_MAC_CARBON
  AuxWinHandle aw_handle;
  CTabHandle ctab_handle;
  ColorSpecPtr ct_table;
  short ct_size;
#endif
  RGBColor bg_color;

  bg_color.red = RED16_FROM_ULONG (color);
  bg_color.green = GREEN16_FROM_ULONG (color);
  bg_color.blue = BLUE16_FROM_ULONG (color);

#if TARGET_API_MAC_CARBON
  SetWindowContentColor (w, &bg_color);
#else
  if (GetAuxWin (w, &aw_handle))
    {
      ctab_handle = (*aw_handle)->awCTable;
      HandToHand ((Handle *) &ctab_handle);
      ct_table = (*ctab_handle)->ctTable;
      ct_size = (*ctab_handle)->ctSize;
      while (ct_size > -1)
	{
	  if (ct_table->value == 0)
	    {
	      ct_table->rgb = bg_color;
	      CTabChanged (ctab_handle);
	      SetWinColor (w, (WCTabHandle) ctab_handle);
	    }
	  ct_size--;
	}
    }
#endif
}


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/* Mac replacement for XSetFont.  */

static void
XSetFont (display, gc, font)
     Display *display;
     GC gc;
     XFontStruct *font;
{
  gc->font = font;
}


static void
XTextExtents16 (XFontStruct *font, XChar2b *text, int nchars,
                     int *direction,int *font_ascent,
                     int *font_descent, XCharStruct *cs)
{
  /* MAC_TODO: Use GetTextMetrics to do this and inline it below. */
}


/* x_sync is a no-op on Mac.  */
void
x_sync (f)
     void *f;
{
}


/* Flush display of frame F, or of all frames if F is null.  */

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static void
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x_flush (f)
     struct frame *f;
{
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#if TARGET_API_MAC_CARBON
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  BLOCK_INPUT;
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  if (f)
    QDFlushPortBuffer (GetWindowPort (FRAME_MAC_WINDOW (f)), NULL);
  else
    QDFlushPortBuffer (GetQDGlobalsThePort (), NULL);
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  UNBLOCK_INPUT;
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#endif
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}


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/* Remove calls to XFlush by defining XFlush to an empty replacement.
   Calls to XFlush should be unnecessary because the X output buffer
   is flushed automatically as needed by calls to XPending,
   XNextEvent, or XWindowEvent according to the XFlush man page.
   XTread_socket calls XPending.  Removing XFlush improves
   performance.  */

#define XFlush(DISPLAY)	(void) 0

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/* Return the struct mac_display_info corresponding to DPY.  There's
   only one.  */

struct mac_display_info *
mac_display_info_for_display (dpy)
     Display *dpy;
{
  return &one_mac_display_info;
}



/***********************************************************************
		    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)
     struct frame *f;
{
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#if TARGET_API_MAC_CARBON
  /* During update of a frame, availability of input events is
     periodically checked with ReceiveNextEvent if
     redisplay-dont-pause is nil.  That normally flushes window buffer
     changes for every check, and thus screen update looks waving even
     if no input is available.  So we disable screen updates during
     update of a frame.  */
  BLOCK_INPUT;
  DisableScreenUpdates ();
  UNBLOCK_INPUT;
#endif
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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.  */

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static void
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x_update_window_begin (w)
     struct window *w;
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  struct mac_display_info *display_info = FRAME_MAC_DISPLAY_INFO (f);
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  updated_window = w;
  set_output_cursor (&w->cursor);

  BLOCK_INPUT;

  if (f == display_info->mouse_face_mouse_frame)
    {
      /* Don't do highlighting for mouse motion during the update.  */
      display_info->mouse_face_defer = 1;

      /* If F needs to be redrawn, simply forget about any prior mouse
	 highlighting.  */
      if (FRAME_GARBAGED_P (f))
	display_info->mouse_face_window = Qnil;

#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))
	{
	  int i;

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	  for (i = 0; i < w->desired_matrix->nrows; ++i)
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	    if (MATRIX_ROW_ENABLED_P (w->desired_matrix, i))
	      break;

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

  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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mac_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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{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
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  XDrawLine (FRAME_MAC_DISPLAY (f), FRAME_MAC_WINDOW (f),
	     f->output_data.mac->normal_gc, x, y0, x, y1);
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}
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/* End update of window W (which is equal to updated_win