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/* NeXT/Open/GNUstep / MacOSX communication module.
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Copyright (C) 1989, 1993-1994, 2005-2006, 2008-2012
  Free Software Foundation, Inc.
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This file is part of GNU Emacs.

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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
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along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
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/*
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Originally by Carl Edman
Updated by Christian Limpach (chris@nice.ch)
OpenStep/Rhapsody port by Scott Bender (sbender@harmony-ds.com)
MacOSX/Aqua port by Christophe de Dinechin (descubes@earthlink.net)
GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu)
*/

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/* This should be the first include, as it may set up #defines affecting
   interpretation of even the system includes. */
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#include <config.h>
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#include <math.h>
#include <sys/types.h>
#include <time.h>
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#include <signal.h>
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#include <unistd.h>
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#include <setjmp.h>
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#include <c-strcase.h>
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#include <ftoastr.h>
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#include "lisp.h"
#include "blockinput.h"
#include "sysselect.h"
#include "nsterm.h"
#include "systime.h"
#include "character.h"
#include "fontset.h"
#include "composite.h"
#include "ccl.h"

#include "termhooks.h"
#include "termopts.h"
#include "termchar.h"

#include "window.h"
#include "keyboard.h"
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#include "buffer.h"
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#include "font.h"

/* call tracing */
#if 0
int term_trace_num = 0;
#define NSTRACE(x)        fprintf (stderr, "%s:%d: [%d] " #x "\n",         \
                                __FILE__, __LINE__, ++term_trace_num)
#else
#define NSTRACE(x)
#endif

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extern NSString *NSMenuDidBeginTrackingNotification;
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/* ==========================================================================

    Local declarations

   ========================================================================== */

/* Convert a symbol indexed with an NSxxx value to a value as defined
   in keyboard.c (lispy_function_key). I hope this is a correct way
   of doing things... */
static unsigned convert_ns_to_X_keysym[] =
{
  NSHomeFunctionKey,            0x50,
  NSLeftArrowFunctionKey,       0x51,
  NSUpArrowFunctionKey,         0x52,
  NSRightArrowFunctionKey,      0x53,
  NSDownArrowFunctionKey,       0x54,
  NSPageUpFunctionKey,          0x55,
  NSPageDownFunctionKey,        0x56,
  NSEndFunctionKey,             0x57,
  NSBeginFunctionKey,           0x58,
  NSSelectFunctionKey,          0x60,
  NSPrintFunctionKey,           0x61,
  NSExecuteFunctionKey,         0x62,
  NSInsertFunctionKey,          0x63,
  NSUndoFunctionKey,            0x65,
  NSRedoFunctionKey,            0x66,
  NSMenuFunctionKey,            0x67,
  NSFindFunctionKey,            0x68,
  NSHelpFunctionKey,            0x6A,
  NSBreakFunctionKey,           0x6B,

  NSF1FunctionKey,              0xBE,
  NSF2FunctionKey,              0xBF,
  NSF3FunctionKey,              0xC0,
  NSF4FunctionKey,              0xC1,
  NSF5FunctionKey,              0xC2,
  NSF6FunctionKey,              0xC3,
  NSF7FunctionKey,              0xC4,
  NSF8FunctionKey,              0xC5,
  NSF9FunctionKey,              0xC6,
  NSF10FunctionKey,             0xC7,
  NSF11FunctionKey,             0xC8,
  NSF12FunctionKey,             0xC9,
  NSF13FunctionKey,             0xCA,
  NSF14FunctionKey,             0xCB,
  NSF15FunctionKey,             0xCC,
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  NSF16FunctionKey,             0xCD,
  NSF17FunctionKey,             0xCE,
  NSF18FunctionKey,             0xCF,
  NSF19FunctionKey,             0xD0,
  NSF20FunctionKey,             0xD1,
  NSF21FunctionKey,             0xD2,
  NSF22FunctionKey,             0xD3,
  NSF23FunctionKey,             0xD4,
  NSF24FunctionKey,             0xD5,
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  NSBackspaceCharacter,         0x08,  /* 8: Not on some KBs. */
  NSDeleteCharacter,            0xFF,  /* 127: Big 'delete' key upper right. */
  NSDeleteFunctionKey,          0x9F,  /* 63272: Del forw key off main array. */

  NSTabCharacter,		0x09,
  0x19,				0x09,  /* left tab->regular since pass shift */
  NSCarriageReturnCharacter,	0x0D,
  NSNewlineCharacter,		0x0D,
  NSEnterCharacter,		0x8D,

  0x1B,				0x1B   /* escape */
};

static Lisp_Object Qmodifier_value;
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Lisp_Object Qalt, Qcontrol, Qhyper, Qmeta, Qsuper, Qnone;
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extern Lisp_Object Qcursor_color, Qcursor_type, Qns, Qleft;
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static Lisp_Object QUTF8_STRING;

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/* On OS X picks up the default NSGlobalDomain AppleAntiAliasingThreshold,
   the maximum font size to NOT antialias.  On GNUstep there is currently
   no way to control this behavior. */
float ns_antialias_threshold;

/* Used to pick up AppleHighlightColor on OS X */
NSString *ns_selection_color;

NSArray *ns_send_types =0, *ns_return_types =0, *ns_drag_types =0;
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NSString *ns_app_name = @"Emacs";  /* default changed later */
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/* Display variables */
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struct ns_display_info *x_display_list; /* Chain of existing displays */
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Lisp_Object ns_display_name_list;
long context_menu_value = 0;

/* display update */
NSPoint last_mouse_motion_position;
static NSRect last_mouse_glyph;
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static Time last_mouse_movement_time = 0;
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static Lisp_Object last_mouse_motion_frame;
static EmacsScroller *last_mouse_scroll_bar = nil;
static struct frame *ns_updating_frame;
static NSView *focus_view = NULL;
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static int ns_window_num = 0;
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#ifdef NS_IMPL_GNUSTEP
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static NSRect uRect;
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#endif
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static BOOL gsaved = NO;
BOOL ns_in_resize = NO;
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static BOOL ns_fake_keydown = NO;
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int ns_tmp_flags; /* FIXME */
struct nsfont_info *ns_tmp_font; /* FIXME */
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static BOOL ns_menu_bar_is_hidden = NO;
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/*static int debug_lock = 0; */

/* event loop */
static BOOL send_appdefined = YES;
static NSEvent *last_appdefined_event = 0;
static NSTimer *timed_entry = 0;
static NSTimer *fd_entry = nil;
static NSTimer *scroll_repeat_entry = nil;
static fd_set select_readfds, t_readfds;
static int select_nfds;
static NSAutoreleasePool *outerpool;
static struct input_event *emacs_event = NULL;
static struct input_event *q_event_ptr = NULL;
static int n_emacs_events_pending = 0;
static NSMutableArray *ns_pending_files, *ns_pending_service_names,
  *ns_pending_service_args;
static BOOL inNsSelect = 0;

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/* Convert modifiers in a NeXTstep event to emacs style modifiers.  */
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#define NS_FUNCTION_KEY_MASK 0x800000
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#define NSLeftControlKeyMask    (0x000001 | NSControlKeyMask)
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#define NSRightControlKeyMask   (0x002000 | NSControlKeyMask)
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#define NSLeftCommandKeyMask    (0x000008 | NSCommandKeyMask)
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#define NSRightCommandKeyMask   (0x000010 | NSCommandKeyMask)
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#define NSLeftAlternateKeyMask  (0x000020 | NSAlternateKeyMask)
#define NSRightAlternateKeyMask (0x000040 | NSAlternateKeyMask)
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#define EV_MODIFIERS(e)                               \
    ((([e modifierFlags] & NSHelpKeyMask) ?           \
           hyper_modifier : 0)                        \
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     | (!EQ (ns_right_alternate_modifier, Qleft) && \
        (([e modifierFlags] & NSRightAlternateKeyMask) \
         == NSRightAlternateKeyMask) ? \
           parse_solitary_modifier (ns_right_alternate_modifier) : 0) \
     | (([e modifierFlags] & NSAlternateKeyMask) ?                 \
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           parse_solitary_modifier (ns_alternate_modifier) : 0)   \
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     | (([e modifierFlags] & NSShiftKeyMask) ?     \
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           shift_modifier : 0)                        \
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     | (!EQ (ns_right_control_modifier, Qleft) && \
        (([e modifierFlags] & NSRightControlKeyMask) \
         == NSRightControlKeyMask) ? \
           parse_solitary_modifier (ns_right_control_modifier) : 0) \
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     | (([e modifierFlags] & NSControlKeyMask) ?      \
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           parse_solitary_modifier (ns_control_modifier) : 0)     \
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     | (([e modifierFlags] & NS_FUNCTION_KEY_MASK) ?  \
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           parse_solitary_modifier (ns_function_modifier) : 0)    \
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     | (!EQ (ns_right_command_modifier, Qleft) && \
        (([e modifierFlags] & NSRightCommandKeyMask) \
         == NSRightCommandKeyMask) ? \
           parse_solitary_modifier (ns_right_command_modifier) : 0) \
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     | (([e modifierFlags] & NSCommandKeyMask) ?      \
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           parse_solitary_modifier (ns_command_modifier):0))
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#define EV_UDMODIFIERS(e)                                      \
    ((([e type] == NSLeftMouseDown) ? down_modifier : 0)       \
     | (([e type] == NSRightMouseDown) ? down_modifier : 0)    \
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     | (([e type] == NSOtherMouseDown) ? down_modifier : 0)    \
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     | (([e type] == NSLeftMouseDragged) ? down_modifier : 0)  \
     | (([e type] == NSRightMouseDragged) ? down_modifier : 0) \
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     | (([e type] == NSOtherMouseDragged) ? down_modifier : 0) \
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     | (([e type] == NSLeftMouseUp)   ? up_modifier   : 0)     \
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     | (([e type] == NSRightMouseUp)   ? up_modifier   : 0)    \
     | (([e type] == NSOtherMouseUp)   ? up_modifier   : 0))
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#define EV_BUTTON(e)                                                         \
    ((([e type] == NSLeftMouseDown) || ([e type] == NSLeftMouseUp)) ? 0 :    \
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      (([e type] == NSRightMouseDown) || ([e type] == NSRightMouseUp)) ? 2 : \
     [e buttonNumber] - 1)
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/* Convert the time field to a timestamp in milliseconds. */
#define EV_TIMESTAMP(e) ([e timestamp] * 1000)

/* This is a piece of code which is common to all the event handling
   methods.  Maybe it should even be a function.  */
#define EV_TRAILER(e)                                         \
  {                                                           \
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  XSETFRAME (emacs_event->frame_or_window, emacsframe);       \
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  if (e) emacs_event->timestamp = EV_TIMESTAMP (e);           \
  n_emacs_events_pending++;                                   \
  kbd_buffer_store_event_hold (emacs_event, q_event_ptr);     \
  EVENT_INIT (*emacs_event);                                  \
  ns_send_appdefined (-1);                                    \
  }

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void x_set_cursor_type (struct frame *, Lisp_Object, Lisp_Object);

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/* TODO: get rid of need for these forward declarations */
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static void ns_condemn_scroll_bars (struct frame *f);
static void ns_judge_scroll_bars (struct frame *f);
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void x_set_frame_alpha (struct frame *f);
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/* ==========================================================================

    Utilities

   ========================================================================== */


static Lisp_Object
append2 (Lisp_Object list, Lisp_Object item)
/* --------------------------------------------------------------------------
   Utility to append to a list
   -------------------------------------------------------------------------- */
{
  Lisp_Object array[2];
  array[0] = list;
  array[1] = Fcons (item, Qnil);
  return Fnconc (2, &array[0]);
}


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const char *
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ns_etc_directory (void)
/* If running as a self-contained app bundle, return as a string the
   filename of the etc directory, if present; else nil.  */
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{
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  NSBundle *bundle = [NSBundle mainBundle];
  NSString *resourceDir = [bundle resourcePath];
  NSString *resourcePath;
  NSFileManager *fileManager = [NSFileManager defaultManager];
  BOOL isDir;

  resourcePath = [resourceDir stringByAppendingPathComponent: @"etc"];
  if ([fileManager fileExistsAtPath: resourcePath isDirectory: &isDir])
    {
      if (isDir) return [resourcePath UTF8String];
    }
  return NULL;
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}

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const char *
ns_exec_path (void)
/* If running as a self-contained app bundle, return as a path string
   the filenames of the libexec and bin directories, ie libexec:bin.
   Otherwise, return nil.
   Normally, Emacs does not add its own bin/ directory to the PATH.
   However, a self-contained NS build has a different layout, with
   bin/ and libexec/ subdirectories in the directory that contains
   Emacs.app itself.
   We put libexec first, because init_callproc_1 uses the first
   element to initialize exec-directory.  An alternative would be
   for init_callproc to check for invocation-directory/libexec.
*/
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{
  NSBundle *bundle = [NSBundle mainBundle];
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  NSString *resourceDir = [bundle resourcePath];
  NSString *binDir = [bundle bundlePath];
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  NSString *resourcePath, *resourcePaths;
  NSRange range;
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  BOOL onWindows = NO;       /* FIXME determine this somehow  */
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  NSString *pathSeparator = onWindows ? @";" : @":";
  NSFileManager *fileManager = [NSFileManager defaultManager];
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  NSArray *paths;
  NSEnumerator *pathEnum;
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  BOOL isDir;

  range = [resourceDir rangeOfString: @"Contents"];
  if (range.location != NSNotFound)
    {
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      binDir = [binDir stringByAppendingPathComponent: @"Contents"];
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#ifdef NS_IMPL_COCOA
      binDir = [binDir stringByAppendingPathComponent: @"MacOS"];
#endif
    }

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  paths = [binDir stringsByAppendingPaths:
                [NSArray arrayWithObjects: @"libexec", @"bin", nil]];
  pathEnum = [paths objectEnumerator];
  resourcePaths = @"";

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  while ((resourcePath = [pathEnum nextObject]))
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    {
      if ([fileManager fileExistsAtPath: resourcePath isDirectory: &isDir])
        if (isDir)
          {
            if ([resourcePaths length] > 0)
              resourcePaths
                = [resourcePaths stringByAppendingString: pathSeparator];
            resourcePaths
              = [resourcePaths stringByAppendingString: resourcePath];
          }
    }
  if ([resourcePaths length] > 0) return [resourcePaths UTF8String];

  return NULL;
}


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const char *
ns_load_path (void)
/* If running as a self-contained app bundle, return as a path string
   the filenames of the site-lisp, lisp and leim directories.
   Ie, site-lisp:lisp:leim.  Otherwise, return nil.  */
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{
  NSBundle *bundle = [NSBundle mainBundle];
  NSString *resourceDir = [bundle resourcePath];
  NSString *resourcePath, *resourcePaths;
  BOOL onWindows = NO;          /* FIXME determine this somehow */
  NSString *pathSeparator = onWindows ? @";" : @":";
  NSFileManager *fileManager = [NSFileManager defaultManager];
  BOOL isDir;
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  NSArray *paths = [resourceDir stringsByAppendingPaths:
                              [NSArray arrayWithObjects:
                                         @"site-lisp", @"lisp", @"leim", nil]];
  NSEnumerator *pathEnum = [paths objectEnumerator];
  resourcePaths = @"";
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  /* Hack to skip site-lisp.  */
  if (no_site_lisp) resourcePath = [pathEnum nextObject];

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  while ((resourcePath = [pathEnum nextObject]))
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    {
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      if ([fileManager fileExistsAtPath: resourcePath isDirectory: &isDir])
        if (isDir)
          {
            if ([resourcePaths length] > 0)
              resourcePaths
                = [resourcePaths stringByAppendingString: pathSeparator];
            resourcePaths
              = [resourcePaths stringByAppendingString: resourcePath];
          }
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    }
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  if ([resourcePaths length] > 0) return [resourcePaths UTF8String];

  return NULL;
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}

static void
ns_timeout (int usecs)
/* --------------------------------------------------------------------------
     Blocking timer utility used by ns_ring_bell
   -------------------------------------------------------------------------- */
{
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  EMACS_TIME wakeup = add_emacs_time (current_emacs_time (),
				      make_emacs_time (0, usecs * 1000));
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  /* Keep waiting until past the time wakeup.  */
  while (1)
    {
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      EMACS_TIME timeout, now = current_emacs_time ();
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      if (EMACS_TIME_LE (wakeup, now))
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	break;
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      timeout = sub_emacs_time (wakeup, now);
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      /* Try to wait that long--but we might wake up sooner.  */
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      pselect (0, NULL, NULL, NULL, &timeout, NULL);
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    }
}


void
ns_release_object (void *obj)
/* --------------------------------------------------------------------------
    Release an object (callable from C)
   -------------------------------------------------------------------------- */
{
    [(id)obj release];
}


void
ns_retain_object (void *obj)
/* --------------------------------------------------------------------------
    Retain an object (callable from C)
   -------------------------------------------------------------------------- */
{
    [(id)obj retain];
}


void *
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ns_alloc_autorelease_pool (void)
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/* --------------------------------------------------------------------------
     Allocate a pool for temporary objects (callable from C)
   -------------------------------------------------------------------------- */
{
  return [[NSAutoreleasePool alloc] init];
}


void
ns_release_autorelease_pool (void *pool)
/* --------------------------------------------------------------------------
     Free a pool and temporary objects it refers to (callable from C)
   -------------------------------------------------------------------------- */
{
  ns_release_object (pool);
}



/* ==========================================================================

    Focus (clipping) and screen update

   ========================================================================== */

static NSRect
ns_resize_handle_rect (NSWindow *window)
{
  NSRect r = [window frame];
  r.origin.x = r.size.width - RESIZE_HANDLE_SIZE;
  r.origin.y = 0;
  r.size.width = r.size.height = RESIZE_HANDLE_SIZE;
  return r;
}


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//
// Window constraining
// -------------------
//
// To ensure that the windows are not placed under the menu bar, they
// are typically moved by the call-back constrainFrameRect. However,
// by overriding it, it's possible to inhibit this, leaving the window
// in it's original position.
//
// It's possible to hide the menu bar. However, technically, it's only
// possible to hide it when the application is active. To ensure that
// this work properly, the menu bar and window constraining are
// deferred until the application becomes active.
//
// Even though it's not possible to manually move a window above the
// top of the screen, it is allowed if it's done programmatically,
// when the menu is hidden. This allows the editable area to cover the
// full screen height.
//
// Test cases
// ----------
//
// Use the following extra files:
//
//    init.el:
//       ;; Hide menu and place frame slightly above the top of the screen.
//       (setq ns-auto-hide-menu-bar t)
//       (set-frame-position (selected-frame) 0 -20)
//
// Test 1:
//
//    emacs -Q -l init.el
//
//    Result: No menu bar, and the title bar should be above the screen.
//
// Test 2:
//
//    emacs -Q
//
//    Result: Menu bar visible, frame placed immediately below the menu.
//

static void
ns_constrain_all_frames (void)
{
  Lisp_Object tail, frame;

  FOR_EACH_FRAME (tail, frame)
    {
      struct frame *f = XFRAME (frame);
      if (FRAME_NS_P (f))
        {
          NSView *view = FRAME_NS_VIEW (f);
          /* This no-op will trigger the default window placing
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           * constraint system. */
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          f->output_data.ns->dont_constrain = 0;
          [[view window] setFrameOrigin:[[view window] frame].origin];
        }
    }
}


/* True, if the menu bar should be hidden.  */

static BOOL
ns_menu_bar_should_be_hidden (void)
{
  return !NILP (ns_auto_hide_menu_bar)
    && [NSApp respondsToSelector:@selector(setPresentationOptions:)];
}


/* Show or hide the menu bar, based on user setting.  */

static void
ns_update_auto_hide_menu_bar (void)
{
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#ifndef MAC_OS_X_VERSION_10_6
#define MAC_OS_X_VERSION_10_6 1060
#endif
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#ifdef NS_IMPL_COCOA
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
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  BLOCK_INPUT;

  NSTRACE (ns_update_auto_hide_menu_bar);

  if (NSApp != nil
      && [NSApp isActive]
      && [NSApp respondsToSelector:@selector(setPresentationOptions:)])
    {
      // Note, "setPresentationOptions" triggers an error unless the
      // application is active.
      BOOL menu_bar_should_be_hidden = ns_menu_bar_should_be_hidden ();

      if (menu_bar_should_be_hidden != ns_menu_bar_is_hidden)
        {
          NSApplicationPresentationOptions options
            = NSApplicationPresentationAutoHideDock;

          if (menu_bar_should_be_hidden)
            options |= NSApplicationPresentationAutoHideMenuBar;

          [NSApp setPresentationOptions: options];

          ns_menu_bar_is_hidden = menu_bar_should_be_hidden;

          if (!ns_menu_bar_is_hidden)
            {
              ns_constrain_all_frames ();
            }
        }
    }

  UNBLOCK_INPUT;
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#endif
#endif
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}


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static void
ns_update_begin (struct frame *f)
/* --------------------------------------------------------------------------
   Prepare for a grouped sequence of drawing calls
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   external (RIF) call; whole frame, called before update_window_begin
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   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
  NSTRACE (ns_update_begin);

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  ns_update_auto_hide_menu_bar ();

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  ns_updating_frame = f;
  [view lockFocus];

#ifdef NS_IMPL_GNUSTEP
  uRect = NSMakeRect (0, 0, 0, 0);
#endif
}


static void
ns_update_window_begin (struct window *w)
/* --------------------------------------------------------------------------
   Prepare for a grouped sequence of drawing calls
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   external (RIF) call; for one window, called after update_begin
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   -------------------------------------------------------------------------- */
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
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 Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
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  NSTRACE (ns_update_window_begin);

  updated_window = w;
  set_output_cursor (&w->cursor);

  BLOCK_INPUT;

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  if (f == hlinfo->mouse_face_mouse_frame)
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    {
      /* Don't do highlighting for mouse motion during the update.  */
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      hlinfo->mouse_face_defer = 1;
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        /* If the frame needs to be redrawn,
           simply forget about any prior mouse highlighting.  */
      if (FRAME_GARBAGED_P (f))
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        hlinfo->mouse_face_window = Qnil;
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      /* (further code for mouse faces ifdef'd out in other terms elided) */
    }

  UNBLOCK_INPUT;
}


static void
ns_update_window_end (struct window *w, int cursor_on_p,
                      int mouse_face_overwritten_p)
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
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   external (RIF) call; for one window called before update_end
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   -------------------------------------------------------------------------- */
{
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  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (XFRAME (w->frame));
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692

  /* note: this fn is nearly identical in all terms */
  if (!w->pseudo_window_p)
    {
      BLOCK_INPUT;

      if (cursor_on_p)
	display_and_set_cursor (w, 1,
                                output_cursor.hpos, output_cursor.vpos,
				output_cursor.x, output_cursor.y);

      if (draw_window_fringes (w, 1))
	x_draw_vertical_border (w);

      UNBLOCK_INPUT;
    }

  /* If a row with mouse-face was overwritten, arrange for
     frame_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
    {
693 694 695
      hlinfo->mouse_face_beg_row = hlinfo->mouse_face_beg_col = -1;
      hlinfo->mouse_face_end_row = hlinfo->mouse_face_end_col = -1;
      hlinfo->mouse_face_window = Qnil;
696 697 698 699 700 701 702 703 704 705 706
    }

  updated_window = NULL;
  NSTRACE (update_window_end);
}


static void
ns_update_end (struct frame *f)
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
707
   external (RIF) call; for whole frame, called after update_window_end
708 709 710 711
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);

712 713
/*   if (f == MOUSE_HL_INFO (f)->mouse_face_mouse_frame) */
    MOUSE_HL_INFO (f)->mouse_face_defer = 0;
714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735

  BLOCK_INPUT;

#ifdef NS_IMPL_GNUSTEP
  /* trigger flush only in the rectangle we tracked as being drawn */
  [view unlockFocusNeedsFlush: NO];
/*fprintf (stderr, " (%.0f, %.0f : %.0f x %.0f)", uRect.origin.x, uRect.origin.y, uRect.size.width, uRect.size.height); */
  [view lockFocusInRect: uRect];
#endif

  [view unlockFocus];
  [[view window] flushWindow];

  UNBLOCK_INPUT;
  ns_updating_frame = NULL;
  NSTRACE (ns_update_end);
}


static void
ns_flush (struct frame *f)
/* --------------------------------------------------------------------------
736
   external (RIF) call
737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
   NS impl is no-op since currently we flush in ns_update_end and elsewhere
   -------------------------------------------------------------------------- */
{
    NSTRACE (ns_flush);
}


static void
ns_focus (struct frame *f, NSRect *r, int n)
/* --------------------------------------------------------------------------
   Internal: Focus on given frame.  During small local updates this is used to
     draw, however during large updates, ns_update_begin and ns_update_end are
     called to wrap the whole thing, in which case these calls are stubbed out.
     Except, on GNUstep, we accumulate the rectangle being drawn into, because
     the back end won't do this automatically, and will just end up flushing
     the entire window.
   -------------------------------------------------------------------------- */
{
755
//  NSTRACE (ns_focus);
756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
#ifdef NS_IMPL_GNUSTEP
  NSRect u;
    if (n == 2)
      u = NSUnionRect (r[0], r[1]);
    else if (r)
      u = *r;
#endif
/* static int c =0;
   fprintf (stderr, "focus: %d", c++);
   if (r) fprintf (stderr, " (%.0f, %.0f : %.0f x %.0f)", r->origin.x, r->origin.y, r->size.width, r->size.height);
   fprintf (stderr, "\n"); */

  if (f != ns_updating_frame)
    {
      NSView *view = FRAME_NS_VIEW (f);
      if (view != focus_view)
        {
          if (focus_view != NULL)
            {
              [focus_view unlockFocus];
              [[focus_view window] flushWindow];
/*debug_lock--; */
            }

          if (view)
#ifdef NS_IMPL_GNUSTEP
            r ? [view lockFocusInRect: u] : [view lockFocus];
#else
            [view lockFocus];
#endif
          focus_view = view;
/*if (view) debug_lock++; */
        }
#ifdef NS_IMPL_GNUSTEP
      else
        {
          /* more than one rect being drawn into */
          if (view && r)
            {
              [view unlockFocus]; /* add prev rect to redraw list */
              [view lockFocusInRect: u]; /* focus for draw in new rect */
            }
        }
#endif
    }
#ifdef NS_IMPL_GNUSTEP
  else
    {
      /* in batch mode, but in GNUstep must still track rectangles explicitly */
      uRect = (r ? NSUnionRect (uRect, u) : [FRAME_NS_VIEW (f) visibleRect]);
    }
#endif

809
  /* clipping */
810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
  if (r)
    {
      [[NSGraphicsContext currentContext] saveGraphicsState];
      if (n == 2)
        NSRectClipList (r, 2);
      else
        NSRectClip (*r);
      gsaved = YES;
    }
}


static void
ns_unfocus (struct frame *f)
/* --------------------------------------------------------------------------
     Internal: Remove focus on given frame
   -------------------------------------------------------------------------- */
{
828
//  NSTRACE (ns_unfocus);
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849

  if (gsaved)
    {
      [[NSGraphicsContext currentContext] restoreGraphicsState];
      gsaved = NO;
    }

  if (f != ns_updating_frame)
    {
      if (focus_view != NULL)
        {
          [focus_view unlockFocus];
          [[focus_view window] flushWindow];
          focus_view = NULL;
/*debug_lock--; */
        }
    }
}


static void
850
ns_clip_to_row (struct window *w, struct glyph_row *row, int area, BOOL gc)
851
/* --------------------------------------------------------------------------
852
     Internal (but parallels other terms): Focus drawing on given row
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884
   -------------------------------------------------------------------------- */
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
  NSRect clip_rect;
  int window_x, window_y, window_width;

  window_box (w, area, &window_x, &window_y, &window_width, 0);

  clip_rect.origin.x = window_x - FRAME_INTERNAL_BORDER_WIDTH (f);
  clip_rect.origin.y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, row->y));
  clip_rect.origin.y = max (clip_rect.origin.y, window_y);
  clip_rect.size.width = window_width + 2 * FRAME_INTERNAL_BORDER_WIDTH (f);
  clip_rect.size.height = row->visible_height;

  /* allow a full-height row at the top when requested
     (used to draw fringe all the way through internal border area) */
  if (gc && clip_rect.origin.y < 5)
    {
      clip_rect.origin.y -= FRAME_INTERNAL_BORDER_WIDTH (f);
      clip_rect.size.height += FRAME_INTERNAL_BORDER_WIDTH (f);
    }

  /* likewise at bottom */
  if (gc &&
      FRAME_PIXEL_HEIGHT (f) - (clip_rect.origin.y + clip_rect.size.height) < 5)
    clip_rect.size.height += FRAME_INTERNAL_BORDER_WIDTH (f);

  ns_focus (f, &clip_rect, 1);
}


static void
885
ns_ring_bell (struct frame *f)
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902
/* --------------------------------------------------------------------------
     "Beep" routine
   -------------------------------------------------------------------------- */
{
  NSTRACE (ns_ring_bell);
  if (visible_bell)
    {
      NSAutoreleasePool *pool;
      struct frame *frame = SELECTED_FRAME ();
      NSView *view;

      BLOCK_INPUT;
      pool = [[NSAutoreleasePool alloc] init];

      view = FRAME_NS_VIEW (frame);
      if (view != nil)
        {
903 904 905 906 907 908 909 910 911 912 913 914 915 916
          NSRect r, surr;
          NSPoint dim = NSMakePoint (128, 128);

          r = [view bounds];
          r.origin.x += (r.size.width - dim.x) / 2;
          r.origin.y += (r.size.height - dim.y) / 2;
          r.size.width = dim.x;
          r.size.height = dim.y;
          surr = NSInsetRect (r, -2, -2);
          ns_focus (frame, &surr, 1);
          [[view window] cacheImageInRect: [view convertRect: surr toView:nil]];
          [ns_lookup_indexed_color (NS_FACE_FOREGROUND
                                      (FRAME_DEFAULT_FACE (frame)), frame) set];
          NSRectFill (r);
917 918
          [[view window] flushWindow];
          ns_timeout (150000);
919
          [[view window] restoreCachedImage];
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939
          [[view window] flushWindow];
          ns_unfocus (frame);
        }
      [pool release];
      UNBLOCK_INPUT;
    }
  else
    {
      NSBeep ();
    }
}


static void
ns_reset_terminal_modes (struct terminal *terminal)
/*  Externally called as hook */
{
  NSTRACE (ns_reset_terminal_modes);
}

940

941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965
static void
ns_set_terminal_modes (struct terminal *terminal)
/*  Externally called as hook */
{
  NSTRACE (ns_set_terminal_modes);
}



/* ==========================================================================

    Frame / window manager related functions

   ========================================================================== */


static void
ns_raise_frame (struct frame *f)
/* --------------------------------------------------------------------------
     Bring window to foreground and make it active
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
  check_ns ();
  BLOCK_INPUT;
966 967 968 969 970
  FRAME_SAMPLE_VISIBILITY (f);
  if (FRAME_VISIBLE_P (f))
    {
      [[view window] makeKeyAndOrderFront: NSApp];
    }
971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
  UNBLOCK_INPUT;
}


static void
ns_lower_frame (struct frame *f)
/* --------------------------------------------------------------------------
     Send window to back
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
  check_ns ();
  BLOCK_INPUT;
  [[view window] orderBack: NSApp];
  UNBLOCK_INPUT;
}


static void
ns_frame_raise_lower (struct frame *f, int raise)
/* --------------------------------------------------------------------------
     External (hook)
   -------------------------------------------------------------------------- */
{
  NSTRACE (ns_frame_raise_lower);

  if (raise)
    ns_raise_frame (f);
  else
    ns_lower_frame (f);
}


static void
ns_frame_rehighlight (struct frame *frame)
/* --------------------------------------------------------------------------
     External (hook): called on things like window switching within frame
   -------------------------------------------------------------------------- */
{
  struct ns_display_info *dpyinfo = FRAME_NS_DISPLAY_INFO (frame);
1011
  struct frame *old_highlight = dpyinfo->x_highlight_frame;
1012 1013

  NSTRACE (ns_frame_rehighlight);
1014
  if (dpyinfo->x_focus_frame)
1015
    {
1016 1017 1018 1019 1020
      dpyinfo->x_highlight_frame
	= (FRAMEP (FRAME_FOCUS_FRAME (dpyinfo->x_focus_frame))
           ? XFRAME (FRAME_FOCUS_FRAME (dpyinfo->x_focus_frame))
           : dpyinfo->x_focus_frame);
      if (!FRAME_LIVE_P (dpyinfo->x_highlight_frame))
1021
        {
1022 1023
          FRAME_FOCUS_FRAME (dpyinfo->x_focus_frame) = Qnil;
          dpyinfo->x_highlight_frame = dpyinfo->x_focus_frame;
1024 1025 1026
        }
    }
  else
1027
      dpyinfo->x_highlight_frame = 0;
1028

1029 1030
  if (dpyinfo->x_highlight_frame &&
         dpyinfo->x_highlight_frame != old_highlight)
1031 1032
    {
      if (old_highlight)
1033
	{
1034
          x_update_cursor (old_highlight, 1);
1035 1036
	  x_set_frame_alpha (old_highlight);
	}
1037
      if (dpyinfo->x_highlight_frame)
1038
	{
1039
          x_update_cursor (dpyinfo->x_highlight_frame, 1);
1040 1041
          x_set_frame_alpha (dpyinfo->x_highlight_frame);
	}
1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
    }
}


void
x_make_frame_visible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Show the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_make_frame_visible);
1053
  /* XXX: at some points in past this was not needed, as the only place that
1054 1055 1056
     called this (frame.c:Fraise_frame ()) also called raise_lower;
     if this ends up the case again, comment this out again. */
  if (!FRAME_VISIBLE_P (f))
1057 1058 1059 1060
    {
      f->async_visible = 1;
      ns_raise_frame (f);
    }
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
}


void
x_make_frame_invisible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Hide the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
  NSView * view = FRAME_NS_VIEW (f);
  NSTRACE (x_make_frame_invisible);
  check_ns ();
  [[view window] orderOut: NSApp];
1074 1075
  f->async_visible = 0;
  f->async_iconified = 0;
1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
}


void
x_iconify_frame (struct frame *f)
/* --------------------------------------------------------------------------
     External: Iconify window
   -------------------------------------------------------------------------- */
{
  NSView * view = FRAME_NS_VIEW (f);
  struct ns_display_info *dpyinfo = FRAME_NS_DISPLAY_INFO (f);
  NSTRACE (x_iconify_frame);
  check_ns ();

1090 1091
  if (dpyinfo->x_highlight_frame == f)
    dpyinfo->x_highlight_frame = 0;
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107

  if ([[view window] windowNumber] <= 0)
    {
      /* the window is still deferred.  Make it very small, bring it
         on screen and order it out. */
      NSRect s = { { 100, 100}, {0, 0} };
      NSRect t;
      t = [[view window] frame];
      [[view window] setFrame: s display: NO];
      [[view window] orderBack: NSApp];
      [[view window] orderOut: NSApp];
      [[view window] setFrame: t display: NO];
    }
  [[view window] miniaturize: NSApp];
}

1108
/* Free X resources of frame F.  */
1109 1110

void
1111
x_free_frame_resources (struct frame *f)
1112 1113 1114
{
  NSView *view = FRAME_NS_VIEW (f);
  struct ns_display_info *dpyinfo = FRAME_NS_DISPLAY_INFO (f);
1115
  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
1116
  NSTRACE (x_free_frame_resources);
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127
  check_ns ();

  [(EmacsView *)view setWindowClosing: YES]; /* may not have been informed */

  BLOCK_INPUT;

  free_frame_menubar (f);

  if (FRAME_FACE_CACHE (f))
    free_frame_faces (f);

1128 1129 1130 1131
  if (f == dpyinfo->x_focus_frame)
    dpyinfo->x_focus_frame = 0;
  if (f == dpyinfo->x_highlight_frame)
    dpyinfo->x_highlight_frame = 0;
1132
  if (f == hlinfo->mouse_face_mouse_frame)
1133
    {
1134 1135 1136 1137 1138
      hlinfo->mouse_face_beg_row = hlinfo->mouse_face_beg_col = -1;
      hlinfo->mouse_face_end_row = hlinfo->mouse_face_end_col = -1;
      hlinfo->mouse_face_window = Qnil;
      hlinfo->mouse_face_deferred_gc = 0;
      hlinfo->mouse_face_mouse_frame = 0;
1139 1140
    }

1141 1142 1143
  if (f->output_data.ns->miniimage != nil)
    [f->output_data.ns->miniimage release];

1144 1145 1146
  [[view window] close];
  [view release];

1147 1148
  xfree (f->output_data.ns);

1149 1150 1151
  UNBLOCK_INPUT;
}

1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
void
x_destroy_window (struct frame *f)
/* --------------------------------------------------------------------------
     External: Delete the window
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_destroy_window);
  check_ns ();
  x_free_frame_resources (f);
  ns_window_num--;
}

1164 1165 1166 1167 1168 1169 1170 1171

void
x_set_offset (struct frame *f, int xoff, int yoff, int change_grav)
/* --------------------------------------------------------------------------
     External: Position the window
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
1172 1173 1174
  NSArray *screens = [NSScreen screens];
  NSScreen *fscreen = [screens objectAtIndex: 0];
  NSScreen *screen = [[view window] screen];
1175 1176 1177 1178 1179 1180 1181

  NSTRACE (x_set_offset);

  BLOCK_INPUT;

  f->left_pos = xoff;
  f->top_pos = yoff;
1182

1183
  if (view != nil && screen && fscreen)
1184 1185 1186 1187 1188
    {
      f->left_pos = f->size_hint_flags & XNegative
        ? [screen visibleFrame].size.width + f->left_pos - FRAME_PIXEL_WIDTH (f)
        : f->left_pos;
      /* We use visibleFrame here to take menu bar into account.
1189
	 Ideally we should also adjust left/top with visibleFrame.origin.  */
1190

1191 1192 1193 1194 1195
      f->top_pos = f->size_hint_flags & YNegative
        ? ([screen visibleFrame].size.height + f->top_pos
           - FRAME_PIXEL_HEIGHT (f) - FRAME_NS_TITLEBAR_HEIGHT (f)
           - FRAME_TOOLBAR_HEIGHT (f))
        : f->top_pos;
1196
#ifdef NS_IMPL_GNUSTEP
1197 1198
      if (f->left_pos < 100)
        f->left_pos = 100;  /* don't overlap menu */
1199
#endif
1200 1201 1202
      /* Constrain the setFrameTopLeftPoint so we don't move behind the
         menu bar.  */
      f->output_data.ns->dont_constrain = 0;
1203 1204
      [[view window] setFrameTopLeftPoint:
                       NSMakePoint (SCREENMAXBOUND (f->left_pos),
1205
                                    SCREENMAXBOUND ([fscreen frame].size.height
1206 1207 1208
                                                    - NS_TOP_POS (f)))];
      f->size_hint_flags &= ~(XNegative|YNegative);
    }
1209

1210 1211 1212 1213 1214 1215 1216 1217 1218
  UNBLOCK_INPUT;
}


void
x_set_window_size (struct frame *f, int change_grav, int cols, int rows)
/* --------------------------------------------------------------------------
     Adjust window pixel size based on given character grid size
     Impl is a bit more complex than other terms, need to do some
1219
     internal clipping.
1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257
   -------------------------------------------------------------------------- */
{
  EmacsView *view = FRAME_NS_VIEW (f);
  NSWindow *window = [view window];
  NSRect wr = [window frame];
  int tb = FRAME_EXTERNAL_TOOL_BAR (f);
  int pixelwidth, pixelheight;
  static int oldRows, oldCols, oldFontWidth, oldFontHeight;
  static int oldTB;
  static struct frame *oldF;

  NSTRACE (x_set_window_size);

  if (view == nil ||
      (f == oldF
       && rows == oldRows && cols == oldCols
       && oldFontWidth == FRAME_COLUMN_WIDTH (f)
       && oldFontHeight == FRAME_LINE_HEIGHT (f)
       && oldTB == tb))
    return;

/*fprintf (stderr, "\tsetWindowSize: %d x %d, font size %d x %d\n", cols, rows, FRAME_COLUMN_WIDTH (f), FRAME_LINE_HEIGHT (f)); */

  BLOCK_INPUT;

  check_frame_size (f, &rows, &cols);
  oldF = f;
  oldRows = rows;
  oldCols = cols;
  oldFontWidth = FRAME_COLUMN_WIDTH (f);
  oldFontHeight = FRAME_LINE_HEIGHT (f);
  oldTB = tb;

  f->scroll_bar_actual_width = NS_SCROLL_BAR_WIDTH (f);
  compute_fringe_widths (f, 0);

  pixelwidth =  FRAME_TEXT_COLS_TO_PIXEL_WIDTH   (f, cols);
  pixelheight = FRAME_TEXT_LINES_TO_PIXEL_HEIGHT (f, rows);
1258

1259
  /* If we have a toolbar, take its height into account. */
1260
  if (tb)
1261 1262 1263
    /* NOTE: previously this would generate wrong result if toolbar not
             yet displayed and fixing toolbar_height=32 helped, but
             now (200903) seems no longer needed */
1264
    FRAME_TOOLBAR_HEIGHT (f) =
1265
      NSHeight ([window frameRectForContentRect: NSMakeRect (0, 0, 0, 0)])
1266
        - FRAME_NS_TITLEBAR_HEIGHT (f);
1267
  else
1268
    FRAME_TOOLBAR_HEIGHT (f) = 0;
1269 1270

  wr.size.width = pixelwidth + f->border_width;
1271
  wr.size.height = pixelheight + FRAME_NS_TITLEBAR_HEIGHT (f)
1272
                  + FRAME_TOOLBAR_HEIGHT (f);
1273

1274 1275 1276 1277 1278 1279 1280
  /* Do not try to constrain to this screen.  We may have multiple
     screens, and want Emacs to span those.  Constraining to screen
     prevents that, and that is not nice to the user.  */
 if (f->output_data.ns->zooming)
   f->output_data.ns->zooming = 0;
 else
   wr.origin.y += FRAME_PIXEL_HEIGHT (f) - pixelheight;
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293

  [view setRows: rows andColumns: cols];
  [window setFrame: wr display: YES];

/*fprintf (stderr, "\tx_set_window_size %d, %d\t%d, %d\n", cols, rows, pixelwidth, pixelheight); */

  /* This is a trick to compensate for Emacs' managing the scrollbar area
     as a fixed number of standard character columns.  Instead of leaving
     blank space for the extra, we chopped it off above.  Now for
     left-hand scrollbars, we shift all rendering to the left by the
     difference between the real width and Emacs' imagined one.  For
     right-hand bars, don't worry about it since the extra is never used.
     (Obviously doesn't work for vertically split windows tho..) */
1294 1295 1296 1297 1298 1299 1300 1301
  {
    NSPoint origin = FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f)
      ? NSMakePoint (FRAME_SCROLL_BAR_COLS (f) * FRAME_COLUMN_WIDTH (f)
                     - NS_SCROLL_BAR_WIDTH (f), 0)
      : NSMakePoint (0, 0);
    [view setFrame: NSMakeRect (0, 0, pixelwidth, pixelheight)];
    [view setBoundsOrigin: origin];
  }
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314

  change_frame_size (f, rows, cols, 0, 1, 0); /* pretend, delay, safe */
  FRAME_PIXEL_WIDTH (f) = pixelwidth;
  FRAME_PIXEL_HEIGHT (f) = pixelheight;
/*  SET_FRAME_GARBAGED (f); // this short-circuits expose call in drawRect */

  mark_window_cursors_off (XWINDOW (f->root_window));
  cancel_mouse_face (f);

  UNBLOCK_INPUT;
}


1315

1316 1317 1318 1319 1320 1321
/* ==========================================================================

    Color management

   ========================================================================== */

1322

1323 1324 1325 1326
NSColor *
ns_lookup_indexed_color (unsigned long idx, struct frame *f)
{
  struct ns_color_table *color_table = FRAME_NS_DISPLAY_INFO (f)->color_table;
1327 1328
  if (idx < 1 || idx >= color_table->avail)
    return nil;
1329 1330 1331 1332 1333 1334 1335 1336
  return color_table->colors[idx];
}


unsigned long
ns_index_color (NSColor *color, struct frame *f)
{
  struct ns_color_table *color_table = FRAME_NS_DISPLAY_INFO (f)->color_table;
1337
  ptrdiff_t idx;
1338
  ptrdiff_t i;
1339 1340 1341 1342 1343

  if (!color_table->colors)
    {
      color_table->size = NS_COLOR_CAPACITY;
      color_table->avail = 1; /* skip idx=0 as marker */
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      color_table->colors = xmalloc (color_table->size * sizeof (NSColor *));
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      color_table->colors[0] = nil;
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      color_table->empty_indices = [[NSMutableSet alloc] init];
    }

  /* do we already have this color ? */
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  for (i = 1; i < color_table->avail; i++)
    if (color_table->colors[i] && [color_table->colors[i] isEqual: color])
      return i;
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  if ([color_table->empty_indices count] > 0)
    {
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      NSNumber *index = [color_table->empty_indices anyObject];
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      [color_table->empty_indices removeObject: index];
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      idx = [index unsignedLongValue];
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    }
  else
    {
      if (color_table->avail == color_table->size)
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	color_table->colors =
	  xpalloc (color_table->colors, &color_table->size, 1,
		   min (ULONG_MAX, PTRDIFF_MAX), sizeof *color_table->colors);
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      idx = color_table->avail++;
    }

  color_table->colors[idx] = color;
  [color retain];
/*fprintf(stderr, "color_table: allocated %d\n",idx);*/
  return idx;
}


void
ns_free_indexed_color (unsigned long idx, struct frame *f)
{
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  struct ns_color_table *color_table;
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  NSColor *color;
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  NSNumber *index;

  if (!f)
    return;

  color_table = FRAME_NS_DISPLAY_INFO (f)->color_table;

  if (idx <= 0 || idx >= color_table->size) {
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    message1 ("ns_free_indexed_color: Color index out of range.\n");
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    return;
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  }

  index = [NSNumber numberWithUnsignedInt: idx];
  if ([color_table->empty_indices containsObject: index]) {
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    message1 ("ns_free_indexed_color: attempt to free already freed color.\n");
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    return;
  }

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  color = color_table->colors[idx];
  [color release];
  color_table->colors[idx] = nil;
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  [color_table->empty_indices addObject: index];
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/*fprintf(stderr, "color_table: FREED %d\n",idx);*/
}


static int
ns_get_color (const char *name, NSColor **col)
/* --------------------------------------------------------------------------
     Parse a color name
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   -------------------------------------------------------------------------- */
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/* On *Step, we attempt to mimic the X11 platform here, down to installing an
   X11 rgb.txt-compatible color list in Emacs.clr (see ns_term_init()).
   See: http://thread.gmane.org/gmane.emacs.devel/113050/focus=113272). */
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{
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  NSColor *new = nil;
  static char hex[20];
  int scaling;
  float r = -1.0, g, b;
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  NSString *nsname = [NSString stringWithUTF8String: name];

/*fprintf (stderr, "ns_get_color: '%s'\n", name); */
  BLOCK_INPUT;

  if ([nsname isEqualToString: @"ns_selection_color"])
    {
      nsname = ns_selection_color;
      name = [ns_selection_color UTF8String];
    }

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  /* First, check for some sort of numeric specification. */
  hex[0] = '\0';

  if (name[0] == '0' || name[0] == '1' || name[0] == '.')  /* RGB decimal */
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    {
      NSScanner *scanner = [NSScanner scannerWithString: nsname];
      [scanner scanFloat: &r];
      [scanner scanFloat: &g];
      [scanner scanFloat: &b];
    }
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  else if (!strncmp(name, "rgb:", 4))  /* A newer X11 format -- rgb:r/g/b */
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    scaling = (snprintf (hex, sizeof hex, "%s", name + 4) - 2) / 3;
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  else if (name[0] == '#')        /* An old X11 format; convert to newer */
    {
      int len = (strlen(name) - 1);
      int start = (len % 3 == 0) ? 1 : len / 4 + 1;
      int i;
      scaling = strlen(name+start) / 3;
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      for (i = 0; i < 3; i++)
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	sprintf (hex + i * (scaling + 1), "%.*s/", scaling,
		 name + start + i * scaling);
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      hex[3 * (scaling + 1) - 1] = '\0';
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    }

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