macterm.c 309 KB
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/* Implementation of GUI terminal on the Mac OS.
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   Copyright (C) 2000, 2001, 2002, 2003, 2004,
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                 2005, 2006 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
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */
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/* Contributed by Andrew Choi (akochoi@mac.com).  */
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#include <config.h>
#include <signal.h>
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#include <stdio.h>
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#include "lisp.h"
#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"

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

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#include "charset.h"
#include "coding.h"
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#include "frame.h"
#include "dispextern.h"
#include "fontset.h"
#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 "atimer.h"
#include "keymap.h"
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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-zero, the text will be rendered using Core Graphics text
   rendering which may anti-alias the text.  */
int mac_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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/* 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.)  */
int x_use_underline_position_properties;

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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
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   FONT-LIST-CACHE . RESOURCE-DATABASE), 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.  RESOURCE-DATABASE preserves the X Resource Database
   equivalent, which is implemented with a Lisp object, for the
   display. */
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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;

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

struct frame *pending_autoraise_frame;

/* 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;
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static FRAME_PTR last_mouse_glyph_frame;
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/* 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

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extern Lisp_Object Vsystem_name;
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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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/* The keysyms to use for the various modifiers.  */

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static Lisp_Object Qalt, Qhyper, Qsuper, Qcontrol, Qmeta, Qmodifier_value;
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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

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#define mac_window_to_frame(wp) (((mac_output *) GetWRefCon (wp))->mFP)
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struct mac_display_info *mac_display_info_for_display (Display *);
static void x_update_window_end P_ ((struct window *, int, int));
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 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 *));
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static void mac_focus_changed P_ ((int, struct mac_display_info *,
				   struct frame *, struct input_event *));
static void x_detect_focus_change P_ ((struct mac_display_info *,
				       EventRecord *, struct input_event *));
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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 void x_scroll_bar_report_motion P_ ((struct frame **, Lisp_Object *,
					    enum scroll_bar_part *,
					    Lisp_Object *, Lisp_Object *,
					    unsigned long *));
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static int is_emacs_window P_ ((WindowPtr));
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static XCharStruct *mac_per_char_metric P_ ((XFontStruct *, XChar2b *, int));
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static void XSetFont P_ ((Display *, GC, XFontStruct *));
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/* Defined in macmenu.h.  */
extern void menubar_selection_callback (FRAME_PTR, int);

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#define GC_FORE_COLOR(gc)	(&(gc)->fore_color)
#define GC_BACK_COLOR(gc)	(&(gc)->back_color)
#define GC_FONT(gc)		((gc)->xgcv.font)
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#define FRAME_NORMAL_GC(f)	((f)->output_data.mac->normal_gc)
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#define CG_SET_FILL_COLOR(context, color)			\
  CGContextSetRGBFillColor (context,					\
			    RED_FROM_ULONG (color) / 255.0f,		\
			    GREEN_FROM_ULONG (color) / 255.0f,		\
			    BLUE_FROM_ULONG (color) / 255.0f, 1.0f)
#define CG_SET_STROKE_COLOR(context, color)		\
  CGContextSetRGBStrokeColor (context,					\
			      RED_FROM_ULONG (color) / 255.0f,		\
			      GREEN_FROM_ULONG (color) / 255.0f,	\
			      BLUE_FROM_ULONG (color) / 255.0f, 1.0f)
#if USE_CG_DRAWING
#define FRAME_CG_CONTEXT(f)	((f)->output_data.mac->cg_context)

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/* Fringe bitmaps.  */

static int max_fringe_bmp = 0;
static CGImageRef *fringe_bmp = 0;

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static CGContextRef
mac_begin_cg_clip (f, gc)
     struct frame *f;
     GC gc;
{
  CGContextRef context = FRAME_CG_CONTEXT (f);

  if (!context)
    {
      QDBeginCGContext (GetWindowPort (FRAME_MAC_WINDOW (f)), &context);
      FRAME_CG_CONTEXT (f) = context;
    }

  CGContextSaveGState (context);
  CGContextTranslateCTM (context, 0, FRAME_PIXEL_HEIGHT (f));
  CGContextScaleCTM (context, 1, -1);
  if (gc && gc->n_clip_rects)
    CGContextClipToRects (context, gc->clip_rects, gc->n_clip_rects);

  return context;
}

static void
mac_end_cg_clip (f)
     struct frame *f;
{
  CGContextRestoreGState (FRAME_CG_CONTEXT (f));
}

void
mac_prepare_for_quickdraw (f)
     struct frame *f;
{
  if (f == NULL)
    {
      Lisp_Object rest, frame;
      FOR_EACH_FRAME (rest, frame)
	if (FRAME_MAC_P (XFRAME (frame)))
	  mac_prepare_for_quickdraw (XFRAME (frame));
    }
  else
    {
      CGContextRef context = FRAME_CG_CONTEXT (f);

      if (context)
	{
	  CGContextSynchronize (context);
	  QDEndCGContext (GetWindowPort (FRAME_MAC_WINDOW (f)),
			  &FRAME_CG_CONTEXT (f));
	}
    }
}
#endif
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static RgnHandle saved_port_clip_region = NULL;

static void
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mac_begin_clip (gc)
     GC gc;
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{
  static RgnHandle new_region = NULL;

  if (saved_port_clip_region == NULL)
    saved_port_clip_region = NewRgn ();
  if (new_region == NULL)
    new_region = NewRgn ();

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  if (gc->n_clip_rects)
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    {
      GetClip (saved_port_clip_region);
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      SectRgn (saved_port_clip_region, gc->clip_region, new_region);
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      SetClip (new_region);
    }
}

static void
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mac_end_clip (gc)
     GC gc;
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{
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  if (gc->n_clip_rects)
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    SetClip (saved_port_clip_region);
}

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/* 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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}


/* Mac version of XDrawLine.  */

static void
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mac_draw_line (f, gc, x1, y1, x2, y2)
     struct frame *f;
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     GC gc;
     int x1, y1, x2, y2;
{
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#if USE_CG_DRAWING
  CGContextRef context;
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  float gx1 = x1, gy1 = y1, gx2 = x2, gy2 = y2;

  if (y1 != y2)
    gx1 += 0.5f, gx2 += 0.5f;
  if (x1 != x2)
    gy1 += 0.5f, gy2 += 0.5f;
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  context = mac_begin_cg_clip (f, gc);
  CG_SET_STROKE_COLOR (context, gc->xgcv.foreground);
  CGContextBeginPath (context);
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  CGContextMoveToPoint (context, gx1, gy1);
  CGContextAddLineToPoint (context, gx2, gy2);
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  CGContextClosePath (context);
  CGContextStrokePath (context);
  mac_end_cg_clip (f);
#else
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  if (x1 == x2)
    {
      if (y1 > y2)
	y1--;
      else if (y2 > y1)
	y2--;
    }
  else if (y1 == y2)
    {
      if (x1 > x2)
	x1--;
      else
	x2--;
    }

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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  RGBForeColor (GC_FORE_COLOR (gc));
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  mac_begin_clip (gc);
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  MoveTo (x1, y1);
  LineTo (x2, y2);
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  mac_end_clip (gc);
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#endif
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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;

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  if (x1 == x2)
    {
      if (y1 > y2)
	y1--;
      else if (y2 > y1)
	y2--;
    }
  else if (y1 == y2)
    {
      if (x1 > x2)
	x1--;
      else
	x2--;
    }

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

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  RGBForeColor (GC_FORE_COLOR (gc));
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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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static void
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mac_erase_rectangle (f, gc, x, y, width, height)
     struct frame *f;
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     GC gc;
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     int x, y;
     unsigned int width, height;
{
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#if USE_CG_DRAWING
  CGContextRef context;

  context = mac_begin_cg_clip (f, gc);
  CG_SET_FILL_COLOR (context, gc->xgcv.background);
  CGContextFillRect (context, CGRectMake (x, y, width, height));
  mac_end_cg_clip (f);
#else
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  Rect r;

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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  RGBBackColor (GC_BACK_COLOR (gc));
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  SetRect (&r, x, y, x + width, y + height);

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  mac_begin_clip (gc);
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  EraseRect (&r);
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  mac_end_clip (gc);
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  RGBBackColor (GC_BACK_COLOR (FRAME_NORMAL_GC (f)));
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#endif
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}


/* Mac version of XClearArea.  */

void
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mac_clear_area (f, x, y, width, height)
     struct frame *f;
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     int x, y;
     unsigned int width, height;
{
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  mac_erase_rectangle (f, FRAME_NORMAL_GC (f), x, y, width, height);
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}

/* Mac version of XClearWindow.  */

static void
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mac_clear_window (f)
     struct frame *f;
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{
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#if USE_CG_DRAWING
  CGContextRef context;
  GC gc = FRAME_NORMAL_GC (f);

  context = mac_begin_cg_clip (f, NULL);
  CG_SET_FILL_COLOR (context, gc->xgcv.background);
  CGContextFillRect (context, CGRectMake (0, 0, FRAME_PIXEL_WIDTH (f),
					  FRAME_PIXEL_HEIGHT (f)));
  mac_end_cg_clip (f);
#else
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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  RGBBackColor (GC_BACK_COLOR (FRAME_NORMAL_GC (f)));
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#if TARGET_API_MAC_CARBON
  {
    Rect r;
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    GetWindowPortBounds (FRAME_MAC_WINDOW (f), &r);
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    EraseRect (&r);
  }
#else /* not TARGET_API_MAC_CARBON */
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  EraseRect (&(FRAME_MAC_WINDOW (f)->portRect));
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#endif /* not TARGET_API_MAC_CARBON */
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#endif
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}


/* Mac replacement for XCopyArea.  */

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#if USE_CG_DRAWING
static void
mac_draw_cg_image (image, f, gc, src_x, src_y, width, height,
		   dest_x, dest_y, overlay_p)
     CGImageRef image;
     struct frame *f;
     GC gc;
     int src_x, src_y;
     unsigned int width, height;
     int dest_x, dest_y, overlay_p;
{
  CGContextRef context;
  float port_height = FRAME_PIXEL_HEIGHT (f);
  CGRect dest_rect = CGRectMake (dest_x, dest_y, width, height);

  context = mac_begin_cg_clip (f, gc);
  if (!overlay_p)
    {
      CG_SET_FILL_COLOR (context, gc->xgcv.background);
      CGContextFillRect (context, dest_rect);
    }
  CGContextClipToRect (context, dest_rect);
  CGContextScaleCTM (context, 1, -1);
  CGContextTranslateCTM (context, 0, -port_height);
  if (CGImageIsMask (image))
    CG_SET_FILL_COLOR (context, gc->xgcv.foreground);
  CGContextDrawImage (context,
		      CGRectMake (dest_x - src_x,
				  port_height - (dest_y - src_y
						 + CGImageGetHeight (image)),
				  CGImageGetWidth (image),
				  CGImageGetHeight (image)),
		      image);
  mac_end_cg_clip (f);
}

#else  /* !USE_CG_DRAWING */

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static void
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mac_draw_bitmap (f, gc, x, y, width, height, bits, overlay_p)
     struct frame *f;
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     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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  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 (FRAME_MAC_WINDOW (f));
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  RGBForeColor (GC_FORE_COLOR (gc));
  RGBBackColor (GC_BACK_COLOR (gc));
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  SetRect (&r, x, y, x + width, y + height);
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  mac_begin_clip (gc);
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#if TARGET_API_MAC_CARBON
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  {
    CGrafPtr port;

    GetPort (&port);
    LockPortBits (port);
    CopyBits (&bitmap, GetPortBitMapForCopyBits (port),
	      &(bitmap.bounds), &r, overlay_p ? srcOr : srcCopy, 0);
    UnlockPortBits (port);
  }
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#else /* not TARGET_API_MAC_CARBON */
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  CopyBits (&bitmap, &(FRAME_MAC_WINDOW (f)->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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  mac_end_clip (gc);
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  RGBBackColor (GC_BACK_COLOR (FRAME_NORMAL_GC (f)));
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}
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#endif	/* !USE_CG_DRAWING */
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/* 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;
Steven Tamm's avatar
Steven Tamm committed
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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);
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#if !defined (WORDS_BIG_ENDIAN) && USE_CG_DRAWING
  if (depth == 1)
#endif
    err = NewGWorld (&pixmap, depth, &r, NULL, NULL, 0);
#if !defined (WORDS_BIG_ENDIAN) && USE_CG_DRAWING
  else
    /* CreateCGImageFromPixMaps requires ARGB format.  */
    err = QTNewGWorld (&pixmap, k32ARGBPixelFormat, &r, NULL, NULL, 0);
#endif
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  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;
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     unsigned int depth;
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{
  Pixmap pixmap;
  BitMap bitmap;
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  CGrafPtr old_port;
  GDHandle old_gdh;
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  static GC gc = NULL;		/* not reentrant */

  if (gc == NULL)
    gc = XCreateGC (display, w, 0, NULL);
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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);
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  XSetForeground (display, gc, fg);
  XSetBackground (display, gc, bg);
  RGBForeColor (GC_FORE_COLOR (gc));
  RGBBackColor (GC_BACK_COLOR (gc));
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  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
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mac_fill_rectangle (f, gc, x, y, width, height)
     struct frame *f;
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     GC gc;
     int x, y;
     unsigned int width, height;
{
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#if USE_CG_DRAWING
  CGContextRef context;

  context = mac_begin_cg_clip (f, gc);
  CG_SET_FILL_COLOR (context, gc->xgcv.foreground);
  CGContextFillRect (context, CGRectMake (x, y, width, height));
  mac_end_cg_clip (f);
#else
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  Rect r;

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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  RGBForeColor (GC_FORE_COLOR (gc));
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  SetRect (&r, x, y, x + width, y + height);

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  mac_begin_clip (gc);
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  PaintRect (&r); /* using foreground color of gc */
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  mac_end_clip (gc);
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#endif
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}


/* Mac replacement for XDrawRectangle: dest is a window.  */

static void
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mac_draw_rectangle (f, gc, x, y, width, height)
     struct frame *f;
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     GC gc;
     int x, y;
     unsigned int width, height;
{
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#if USE_CG_DRAWING
  CGContextRef context;

  context = mac_begin_cg_clip (f, gc);
  CG_SET_STROKE_COLOR (context, gc->xgcv.foreground);
  CGContextStrokeRect (context,
		       CGRectMake (x + 0.5f, y + 0.5f, width, height));
  mac_end_cg_clip (f);
#else
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  Rect r;

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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  RGBForeColor (GC_FORE_COLOR (gc));
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  SetRect (&r, x, y, x + width + 1, y + height + 1);
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  mac_begin_clip (gc);
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  FrameRect (&r); /* using foreground color of gc */
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  mac_end_clip (gc);
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#endif
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}


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#if USE_ATSUI
static OSStatus
atsu_get_text_layout_with_text_ptr (text, text_length, style, text_layout)
     ConstUniCharArrayPtr text;
     UniCharCount text_length;
     ATSUStyle style;
     ATSUTextLayout *text_layout;
{
  OSStatus err;
  static ATSUTextLayout saved_text_layout = NULL; /* not reentrant */

  if (saved_text_layout == NULL)
    {
      UniCharCount lengths[] = {kATSUToTextEnd};
      ATSUAttributeTag tags[] = {kATSULineLayoutOptionsTag};
      ByteCount sizes[] = {sizeof (ATSLineLayoutOptions)};
      static ATSLineLayoutOptions line_layout =
#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1020
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	kATSLineDisableAllLayoutOperations | kATSLineUseDeviceMetrics
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	| kATSLineUseQDRendering
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#else
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	kATSLineIsDisplayOnly | kATSLineFractDisable
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#endif
	;
      ATSUAttributeValuePtr values[] = {&line_layout};

      err = ATSUCreateTextLayoutWithTextPtr (text,
					     kATSUFromTextBeginning,
					     kATSUToTextEnd,
					     text_length,
					     1, lengths, &style,
					     &saved_text_layout);
      if (err == noErr)
	err = ATSUSetLayoutControls (saved_text_layout,
				     sizeof (tags) / sizeof (tags[0]),
				     tags, sizes, values);
      /* XXX: Should we do this? */
      if (err == noErr)
	err = ATSUSetTransientFontMatching (saved_text_layout, true);
    }
  else
    {
      err = ATSUSetRunStyle (saved_text_layout, style,
			     kATSUFromTextBeginning, kATSUToTextEnd);
      if (err == noErr)
	err = ATSUSetTextPointerLocation (saved_text_layout, text,
					  kATSUFromTextBeginning,
					  kATSUToTextEnd,
					  text_length);
    }

  if (err == noErr)
    *text_layout = saved_text_layout;
  return err;
}
#endif

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static void
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mac_invert_rectangle (f, x, y, width, height)
     struct frame *f;
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     int x, y;
     unsigned int width, height;
{
  Rect r;

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#if USE_CG_DRAWING
  mac_prepare_for_quickdraw (f);
#endif
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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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  SetRect (&r, x, y, x + width, y + height);

  InvertRect (&r);
}


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static void
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mac_draw_string_common (f, gc, x, y, buf, nchars, bg_width, bytes_per_char)
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     struct frame *f;
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     GC gc;
     int x, y;
     char *buf;
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     int nchars, bg_width, bytes_per_char;
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{
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  SetPortWindowPort (FRAME_MAC_WINDOW (f));
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#if USE_ATSUI
  if (GC_FONT (gc)->mac_style)
    {
      OSErr err;
      ATSUTextLayout text_layout;

      xassert (bytes_per_char == 2);

#ifndef WORDS_BIG_ENDIAN
      {
	int i;
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	UniChar *text = (UniChar *)buf;
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	for (i = 0; i < nchars; i++)
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	  text[i] = EndianU16_BtoN (text[i]);
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      }
#endif
      err = atsu_get_text_layout_with_text_ptr ((ConstUniCharArrayPtr)buf,
						nchars,
						GC_FONT (gc)->mac_style,
						&text_layout);
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      if (err != noErr)
	return;
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#ifdef MAC_OSX
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      if (!mac_use_core_graphics)
	{
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#endif
#if USE_CG_DRAWING
	  mac_prepare_for_quickdraw (f);
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#endif
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	  mac_begin_clip (gc);
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	  RGBForeColor (GC_FORE_COLOR (gc));
	  if (bg_width)
	    {
	      Rect r;

	      SetRect (&r, x, y - FONT_BASE (GC_FONT (gc)),
		       x + bg_width, y + FONT_DESCENT (GC_FONT (gc)));
	      RGBBackColor (GC_BACK_COLOR (gc));
	      EraseRect (&r);
	      RGBBackColor (GC_BACK_COLOR (FRAME_NORMAL_GC (f)));
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	    }
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	  MoveTo (x, y);
	  ATSUDrawText (text_layout,
			kATSUFromTextBeginning, kATSUToTextEnd,
			kATSUUseGrafPortPenLoc, kATSUUseGrafPortPenLoc);
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	  mac_end_clip (gc);
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#ifdef MAC_OSX
	}
      else
	{
	  CGrafPtr port;
	  CGContextRef context;
	  float port_height = FRAME_PIXEL_HEIGHT (f);
	  ATSUAttributeTag tags[] = {kATSUCGContextTag};
	  ByteCount sizes[] = {sizeof (CGContextRef)};
	  ATSUAttributeValuePtr values[] = {&context};

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#if USE_CG_DRAWING
	  context = mac_begin_cg_clip (f, gc);
#else
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	  GetPort (&port);
	  QDBeginCGContext (port, &context);
	  if (gc->n_clip_rects || bg_width)
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	    {
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	      CGContextTranslateCTM (context, 0, port_height);
	      CGContextScaleCTM (context, 1, -1);
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	      if (gc->n_clip_rects)
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		CGContextClipToRects (context, gc->clip_rects,
				      gc->n_clip_rects);
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#endif
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	      if (bg_width)
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		{
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		  CG_SET_FILL_COLOR (context, gc->xgcv.background);
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		  CGContextFillRect
		    (context,
		     CGRectMake (x, y - FONT_BASE (GC_FONT (gc)),
				 bg_width, FONT_HEIGHT (GC_FONT (gc))));
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		}
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	      CGContextScaleCTM (context, 1, -1);
	      CGContextTranslateCTM (context, 0, -port_height);
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#if !USE_CG_DRAWING
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	    }
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#endif
	  CG_SET_FILL_COLOR (context, gc->xgcv.foreground);
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	  err = ATSUSetLayoutControls (text_layout,
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				       sizeof (tags) / sizeof (tags[0]),
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				       tags, sizes, values);
	  if (err == noErr)
	    ATSUDrawText (text_layout,
			  kATSUFromTextBeginning, kATSUToTextEnd,
			  Long2Fix (x), Long2Fix (port_height - y));
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#if USE_CG_DRAWING
	  mac_end_cg_clip (f);
	  context = NULL;
#else
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	  CGContextSynchronize (context);
	  QDEndCGContext (port, &context);
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#endif
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#if 0
	  /* This doesn't work on Mac OS X 10.1.  */
	  ATSUClearLayoutControls (text_layout,
				   sizeof (tags) / sizeof (tags[0]), tags);
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#else
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	  ATSUSetLayoutControls (text_layout,
				 sizeof (tags) / sizeof (tags[0]),
				 tags, sizes, values);
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#endif
	}
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#endif	/* MAC_OSX */
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    }
  else
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#endif	/* USE_ATSUI */
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    {
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1020
      UInt32 savedFlags;

      if (mac_use_core_graphics)
	savedFlags = SwapQDTextFlags (kQDUseCGTextRendering);
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#endif
#if USE_CG_DRAWING
      mac_prepare_for_quickdraw (f);
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#endif
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      mac_begin_clip (gc);
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      RGBForeColor (GC_FORE_COLOR (gc));
#ifdef MAC_OS8
      if (bg_width)
	{
	  RGBBackColor (GC_BACK_COLOR (gc));
	  TextMode (srcCopy);
	}
      else
	TextMode (srcOr);
#else
      /* We prefer not to use srcCopy text transfer mode on Mac OS X
	 because:
	 - Screen is double-buffered.  (In srcCopy mode, a text is
	   drawn into an offscreen graphics world first.  So
	   performance gain cannot be expected.)
	 - It lowers rendering quality.
	 - Some fonts leave garbage on cursor movement.  */
      if (bg_width)
	{
	  Rect r;
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	  RGBBackColor (GC_BACK_COLOR (gc));
	  SetRect (&r, x, y - FONT_BASE (GC_FONT (gc)),
		   x + bg_width, y + FONT_DESCENT (GC_FONT (gc)));
	  EraseRect (&r);
	}
      TextMode (srcOr);
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#endif
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      TextFont (GC_FONT (gc)->mac_fontnum);
      TextSize (GC_FONT (gc)->mac_fontsize);
      TextFace (GC_FONT (gc)->mac_fontface);
      MoveTo (x, y);
      DrawText (buf, 0, nchars * bytes_per_char);
      if (bg_width)
	RGBBackColor (GC_BACK_COLOR (FRAME_NORMAL_GC (f)));
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      mac_end_clip (gc);
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#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1020
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      if (mac_use_core_graphics)
	SwapQDTextFlags(savedFlags);
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#endif
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    }
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}


/* Mac replacement for XDrawString.  */

static void
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mac_draw_string (f, gc, x, y, buf, nchars)
     struct frame *f;
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     GC gc;
     int x, y;
     char *buf;
     int nchars;
{
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  mac_draw_string_common (f, gc, x, y, buf, nchars, 0, 1);
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}


/* Mac replacement for XDrawString16. */

static void
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mac_draw_string_16 (f, gc, x, y, buf, nchars)
     struct frame *f;
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     GC gc;
     int x, y;
     XChar2b *buf;
     int nchars;
{
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  mac_draw_string_common (f, gc, x, y, (char *) buf, nchars, 0, 2);
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}


/* Mac replacement for XDrawImageString.  */

static void
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mac_draw_image_string (f, gc, x, y, buf, nchars, bg_width)
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     struct frame *f;
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     GC gc;
     int x, y;
     char *buf;
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     int nchars, bg_width;
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{
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  mac_draw_string_common (f, gc, x, y, buf, nchars, bg_width, 1);
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}


/* Mac replacement for XDrawString16.  */

static void
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mac_draw_image_string_16 (f, gc, x, y, buf, nchars, bg_width)
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     struct frame *f;
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     GC gc;
     int x, y;
     XChar2b *buf;
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     int nchars, bg_width;
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{
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  mac_draw_string_common (f, gc, x, y, (char *) buf, nchars, bg_width, 2);
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}


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/* Mac replacement for XQueryTextExtents, but takes a character.  If
   STYLE is NULL, measurement is done by QuickDraw Text routines for
   the font of the current graphics port.  If CG_GLYPH is not NULL,
   *CG_GLYPH is set to the glyph ID or 0 if it cannot be obtained.  */

static OSErr
mac_query_char_extents (style, c,
			font_ascent_return, font_descent_return,
			overall_return, cg_glyph)
#if USE_ATSUI
     ATSUStyle style;
#else
     void *style;
#endif
     int c;
     int *font_ascent_return, *font_descent_return;
     XCharStruct *overall_return;
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#if USE_CG_TEXT_DRAWING
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     CGGlyph *cg_glyph;
#else
     void *cg_glyph;
#endif
{
  OSErr err = noErr;
  int width;
  Rect char_bounds;

#if USE_ATSUI
  if (style)
    {
      ATSUTextLayout text_layout;
      UniChar ch = c;

      err = atsu_get_text_layout_with_text_ptr (&ch, 1, style, &text_layout);
      if (err == noErr)
	{
	  ATSTrapezoid glyph_bounds;
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