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/* NeXT/Open/GNUstep / MacOSX communication module.
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Copyright (C) 1989, 1993-1994, 2005-2006, 2008-2013 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 <fcntl.h>
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#include <math.h>
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#include <pthread.h>
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#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 <c-ctype.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 "termchar.h"

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

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#ifdef NS_IMPL_GNUSTEP
#include "process.h"
#endif

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/* 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,
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  NSClearLineFunctionKey,       0x0B,
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  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,

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  0x41|NSNumericPadKeyMask,	0xAE,  /* KP_Decimal */
  0x43|NSNumericPadKeyMask,	0xAA,  /* KP_Multiply */
  0x45|NSNumericPadKeyMask,	0xAB,  /* KP_Add */
  0x4B|NSNumericPadKeyMask,	0xAF,  /* KP_Divide */
  0x4E|NSNumericPadKeyMask,	0xAD,  /* KP_Subtract */
  0x51|NSNumericPadKeyMask,	0xBD,  /* KP_Equal */
  0x52|NSNumericPadKeyMask,	0xB0,  /* KP_0 */
  0x53|NSNumericPadKeyMask,	0xB1,  /* KP_1 */
  0x54|NSNumericPadKeyMask,	0xB2,  /* KP_2 */
  0x55|NSNumericPadKeyMask,	0xB3,  /* KP_3 */
  0x56|NSNumericPadKeyMask,	0xB4,  /* KP_4 */
  0x57|NSNumericPadKeyMask,	0xB5,  /* KP_5 */
  0x58|NSNumericPadKeyMask,	0xB6,  /* KP_6 */
  0x59|NSNumericPadKeyMask,	0xB7,  /* KP_7 */
  0x5B|NSNumericPadKeyMask,	0xB8,  /* KP_8 */
  0x5C|NSNumericPadKeyMask,	0xB9,  /* KP_9 */
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  0x1B,				0x1B   /* escape */
};

static Lisp_Object Qmodifier_value;
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Lisp_Object Qalt, Qcontrol, Qhyper, Qmeta, Qsuper;
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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;
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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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#ifdef NS_IMPL_COCOA
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static BOOL ns_menu_bar_is_hidden = NO;
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#endif
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/*static int debug_lock = 0; */

/* event loop */
static BOOL send_appdefined = YES;
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#define NO_APPDEFINED_DATA (-8)
static int last_appdefined_event_data = NO_APPDEFINED_DATA;
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static NSTimer *timed_entry = 0;
static NSTimer *scroll_repeat_entry = nil;
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static fd_set select_readfds, select_writefds;
enum { SELECT_HAVE_READ = 1, SELECT_HAVE_WRITE = 2, SELECT_HAVE_TMO = 4 };
static int select_nfds = 0, select_valid = 0;
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static struct timespec select_timeout = { 0, 0 };
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static int selfds[2] = { -1, -1 };
static pthread_mutex_t select_mutex;
static int apploopnr = 0;
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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;
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static BOOL ns_do_open_file = NO;
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static BOOL ns_last_use_native_fullscreen;
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static struct {
  struct input_event *q;
  int nr, cap;
} hold_event_q = {
  NULL, 0, 0
};

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#ifdef NS_IMPL_COCOA
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/*
 * State for pending menu activation:
 * MENU_NONE     Normal state
 * MENU_PENDING  A menu has been clicked on, but has been canceled so we can
 *               run lisp to update the menu.
 * MENU_OPENING  Menu is up to date, and the click event is redone so the menu
 *               will open.
 */
#define MENU_NONE 0
#define MENU_PENDING 1
#define MENU_OPENING 2
static int menu_will_open_state = MENU_NONE;

/* Saved position for menu click.  */
static CGPoint menu_mouse_point;
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#endif
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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.  */
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#define EV_TRAILER(e)                                                   \
    {                                                                   \
      XSETFRAME (emacs_event->frame_or_window, emacsframe);             \
      if (e) emacs_event->timestamp = EV_TIMESTAMP (e);                 \
      if (q_event_ptr)                                                  \
        {                                                               \
          n_emacs_events_pending++;                                     \
          kbd_buffer_store_event_hold (emacs_event, q_event_ptr);       \
        }                                                               \
      else                                                              \
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        hold_event (emacs_event);                                       \
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      EVENT_INIT (*emacs_event);                                        \
      ns_send_appdefined (-1);                                          \
    }
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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

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

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static void
hold_event (struct input_event *event)
{
  if (hold_event_q.nr == hold_event_q.cap)
    {
      if (hold_event_q.cap == 0) hold_event_q.cap = 10;
      else hold_event_q.cap *= 2;
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      hold_event_q.q =
        xrealloc (hold_event_q.q, hold_event_q.cap * sizeof *hold_event_q.q);
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    }

  hold_event_q.q[hold_event_q.nr++] = *event;
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  /* Make sure ns_read_socket is called, i.e. we have input.  */
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  raise (SIGIO);
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  send_appdefined = YES;
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}
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static Lisp_Object
append2 (Lisp_Object list, Lisp_Object item)
/* --------------------------------------------------------------------------
   Utility to append to a list
   -------------------------------------------------------------------------- */
{
  Lisp_Object array[2];
  array[0] = list;
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  array[1] = list1 (item);
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  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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  NSString *pathSeparator = [NSString stringWithFormat: @"%c", SEPCHAR];
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  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;
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  NSString *pathSeparator = [NSString stringWithFormat: @"%c", SEPCHAR];
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  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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  struct timespec wakeup = timespec_add (current_timespec (),
					 make_timespec (0, usecs * 1000));
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  /* Keep waiting until past the time wakeup.  */
  while (1)
    {
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      struct timespec timeout, now = current_timespec ();
      if (timespec_cmp (wakeup, now) <= 0)
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	break;
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      timeout = timespec_sub (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

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

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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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#ifdef NS_IMPL_COCOA
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
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  block_input ();
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  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 ();
            }
        }
    }

662
  unblock_input ();
663 664
#endif
#endif
665 666 667
}


668 669 670 671
static void
ns_update_begin (struct frame *f)
/* --------------------------------------------------------------------------
   Prepare for a grouped sequence of drawing calls
672
   external (RIF) call; whole frame, called before update_window_begin
673 674 675 676 677
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
  NSTRACE (ns_update_begin);

678 679
  ns_update_auto_hide_menu_bar ();

680 681 682
  ns_updating_frame = f;
  [view lockFocus];

683 684 685 686
  /* drawRect may have been called for say the minibuffer, and then clip path
     is for the minibuffer.  But the display engine may draw more because
     we have set the frame as garbaged.  So reset clip path to the whole
     view.  */
687 688 689 690
#ifdef NS_IMPL_COCOA
  {
    NSBezierPath *bp;
    NSRect r = [view frame];
691 692 693 694 695 696 697 698 699 700 701 702
    NSRect cr = [[view window] frame];
    /* If a large frame size is set, r may be larger than the window frame
       before constrained.  In that case don't change the clip path, as we
       will clear in to the tool bar and title bar.  */
    if (r.size.height
        + FRAME_NS_TITLEBAR_HEIGHT (f)
        + FRAME_TOOLBAR_HEIGHT (f) <= cr.size.height)
      {
        bp = [[NSBezierPath bezierPathWithRect: r] retain];
        [bp setClip];
        [bp release];
      }
703 704
  }
#endif
705

706 707 708 709 710 711 712 713 714 715
#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
716
   external (RIF) call; for one window, called after update_begin
717 718 719
   -------------------------------------------------------------------------- */
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
720 721
  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);

722 723 724
  NSTRACE (ns_update_window_begin);
  set_output_cursor (&w->cursor);

725
  block_input ();
726

727
  if (f == hlinfo->mouse_face_mouse_frame)
728 729
    {
      /* Don't do highlighting for mouse motion during the update.  */
730
      hlinfo->mouse_face_defer = 1;
731 732 733 734

        /* If the frame needs to be redrawn,
           simply forget about any prior mouse highlighting.  */
      if (FRAME_GARBAGED_P (f))
735
        hlinfo->mouse_face_window = Qnil;
736 737 738 739

      /* (further code for mouse faces ifdef'd out in other terms elided) */
    }

740
  unblock_input ();
741 742 743 744
}


static void
745 746
ns_update_window_end (struct window *w, bool cursor_on_p,
                      bool mouse_face_overwritten_p)
747 748
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
749
   external (RIF) call; for one window called before update_end
750 751 752 753 754
   -------------------------------------------------------------------------- */
{
  /* note: this fn is nearly identical in all terms */
  if (!w->pseudo_window_p)
    {
755
      block_input ();
756 757 758 759 760 761 762 763 764

      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);

765
      unblock_input ();
766 767 768 769 770
    }

  /* If a row with mouse-face was overwritten, arrange for
     frame_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
771
    reset_mouse_highlight (MOUSE_HL_INFO (XFRAME (w->frame)));
772 773 774 775 776 777 778 779 780

  NSTRACE (update_window_end);
}


static void
ns_update_end (struct frame *f)
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
781
   external (RIF) call; for whole frame, called after update_window_end
782 783
   -------------------------------------------------------------------------- */
{
784
  EmacsView *view = FRAME_NS_VIEW (f);
785

786
/*   if (f == MOUSE_HL_INFO (f)->mouse_face_mouse_frame) */
787
  MOUSE_HL_INFO (f)->mouse_face_defer = 0;
788

789
  block_input ();
790 791 792 793

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

794
  unblock_input ();
795 796 797 798 799 800 801 802
  ns_updating_frame = NULL;
  NSTRACE (ns_update_end);
}


static void
ns_flush (struct frame *f)
/* --------------------------------------------------------------------------
803
   external (RIF) call
804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821
   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.
   -------------------------------------------------------------------------- */
{
822
//  NSTRACE (ns_focus);
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
/* 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)
            [view lockFocus];
          focus_view = view;
/*if (view) debug_lock++; */
        }
    }

847
  /* clipping */
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865
  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
   -------------------------------------------------------------------------- */
{
866
//  NSTRACE (ns_unfocus);
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887

  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
888
ns_clip_to_row (struct window *w, struct glyph_row *row, int area, BOOL gc)
889
/* --------------------------------------------------------------------------
890
     Internal (but parallels other terms): Focus drawing on given row
891 892 893 894 895 896 897 898
   -------------------------------------------------------------------------- */
{
  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);

899
  clip_rect.origin.x = window_x;
900 901
  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);
902
  clip_rect.size.width = window_width;
903 904 905 906 907 908 909
  clip_rect.size.height = row->visible_height;

  ns_focus (f, &clip_rect, 1);
}


static void
910
ns_ring_bell (struct frame *f)
911 912 913 914 915 916 917 918 919 920 921
/* --------------------------------------------------------------------------
     "Beep" routine
   -------------------------------------------------------------------------- */
{
  NSTRACE (ns_ring_bell);
  if (visible_bell)
    {
      NSAutoreleasePool *pool;
      struct frame *frame = SELECTED_FRAME ();
      NSView *view;

922
      block_input ();
923 924 925 926 927
      pool = [[NSAutoreleasePool alloc] init];

      view = FRAME_NS_VIEW (frame);
      if (view != nil)
        {
928 929 930 931 932 933 934 935 936 937 938 939 940 941
          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);
942 943
          [[view window] flushWindow];
          ns_timeout (150000);
944
          [[view window] restoreCachedImage];
945 946 947 948
          [[view window] flushWindow];
          ns_unfocus (frame);
        }
      [pool release];
949
      unblock_input ();
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
    }
  else
    {
      NSBeep ();
    }
}


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

965

966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987
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
   -------------------------------------------------------------------------- */
{
988 989 990
  NSView *view;
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
991
  block_input ();
992
  if (FRAME_VISIBLE_P (f))
993
    [[view window] makeKeyAndOrderFront: NSApp];
994
  unblock_input ();
995 996 997 998 999 1000 1001 1002 1003
}


static void
ns_lower_frame (struct frame *f)
/* --------------------------------------------------------------------------
     Send window to back
   -------------------------------------------------------------------------- */
{
1004 1005 1006
  NSView *view;
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
1007
  block_input ();
1008
  [[view window] orderBack: NSApp];
1009
  unblock_input ();
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
}


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);
1035
  struct frame *old_highlight = dpyinfo->x_highlight_frame;
1036 1037

  NSTRACE (ns_frame_rehighlight);
1038
  if (dpyinfo->x_focus_frame)
1039
    {
1040 1041 1042 1043 1044
      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))
1045
        {
1046
          fset_focus_frame (dpyinfo->x_focus_frame, Qnil);
1047
          dpyinfo->x_highlight_frame = dpyinfo->x_focus_frame;
1048 1049 1050
        }
    }
  else
1051
      dpyinfo->x_highlight_frame = 0;
1052

1053 1054
  if (dpyinfo->x_highlight_frame &&
         dpyinfo->x_highlight_frame != old_highlight)
1055 1056
    {
      if (old_highlight)
1057
	{
1058
          x_update_cursor (old_highlight, 1);
1059 1060
	  x_set_frame_alpha (old_highlight);
	}
1061
      if (dpyinfo->x_highlight_frame)
1062
	{
1063
          x_update_cursor (dpyinfo->x_highlight_frame, 1);
1064 1065
          x_set_frame_alpha (dpyinfo->x_highlight_frame);
	}
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
    }
}


void
x_make_frame_visible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Show the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_make_frame_visible);
1077
  /* XXX: at some points in past this was not needed, as the only place that
1078 1079 1080
     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))
1081
    {
1082
      EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
1083 1084

      SET_FRAME_VISIBLE (f, 1);
1085
      ns_raise_frame (f);
1086 1087 1088

      /* Making a new frame from a fullscreen frame will make the new frame
         fullscreen also.  So skip handleFS as this will print an error.  */
1089 1090
      if ([view fsIsNative] && f->want_fullscreen == FULLSCREEN_BOTH
          && [view isFullscreen])
1091
        return;
1092

1093 1094 1095 1096 1097 1098
      if (f->want_fullscreen != FULLSCREEN_NONE)
        {
          block_input ();
          [view handleFS];
          unblock_input ();
        }
1099
    }
1100 1101 1102 1103 1104 1105 1106 1107 1108
}


void
x_make_frame_invisible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Hide the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
1109
  NSView *view;
1110
  NSTRACE (x_make_frame_invisible);
1111 1112
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
1113
  [[view window] orderOut: NSApp];
1114 1115
  SET_FRAME_VISIBLE (f, 0);
  SET_FRAME_ICONIFIED (f, 0);
1116 1117 1118 1119 1120 1121 1122 1123 1124
}


void
x_iconify_frame (struct frame *f)
/* --------------------------------------------------------------------------
     External: Iconify window
   -------------------------------------------------------------------------- */
{
1125 1126 1127
  NSView *view;
  struct ns_display_info *dpyinfo;

1128
  NSTRACE (x_iconify_frame);
1129 1130 1131
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
  dpyinfo = FRAME_NS_DISPLAY_INFO (f);
1132

1133 1134
  if (dpyinfo->x_highlight_frame == f)
    dpyinfo->x_highlight_frame = 0;
1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150

  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];
}

1151
/* Free X resources of frame F.  */
1152 1153

void
1154
x_free_frame_resources (struct frame *f)
1155
{
1156 1157 1158 1159
  NSView *view;
  struct ns_display_info *dpyinfo;
  Mouse_HLInfo *hlinfo;

1160
  NSTRACE (x_free_frame_resources);
1161 1162 1163 1164
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
  dpyinfo = FRAME_NS_DISPLAY_INFO (f);
  hlinfo = MOUSE_HL_INFO (f);
1165 1166 1167

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

1168
  block_input ();
1169 1170 1171 1172 1173 1174

  free_frame_menubar (f);

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

1175 1176 1177 1178
  if (f == dpyinfo->x_focus_frame)
    dpyinfo->x_focus_frame = 0;
  if (f == dpyinfo->x_highlight_frame)
    dpyinfo->x_highlight_frame = 0;
1179
  if (f == hlinfo->mouse_face_mouse_frame)
1180
    reset_mouse_highlight (hlinfo);
1181

1182 1183 1184
  if (f->output_data.ns->miniimage != nil)
    [f->output_data.ns->miniimage release];

1185 1186 1187
  [[view window] close];
  [view release];

1188 1189
  xfree (f->output_data.ns);

1190
  unblock_input ();
1191 1192
}

1193 1194 1195 1196 1197 1198 1199
void
x_destroy_window (struct frame *f)
/* --------------------------------------------------------------------------
     External: Delete the window
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_destroy_window);
1200
  check_window_system (f);
1201 1202 1203 1204
  x_free_frame_resources (f);
  ns_window_num--;
}

1205 1206 1207 1208 1209 1210 1211 1212

void
x_set_offset (struct frame *f, int xoff, int yoff, int change_grav)
/* --------------------------------------------------------------------------
     External: Position the window
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
1213 1214 1215
  NSArray *screens = [NSScreen screens];
  NSScreen *fscreen = [screens objectAtIndex: 0];
  NSScreen *screen = [[view window] screen];
1216 1217 1218

  NSTRACE (x_set_offset);

1219
  block_input ();
1220 1221 1222

  f->left_pos = xoff;
  f->top_pos = yoff;
1223

1224
  if (view != nil && screen && fscreen)
1225 1226 1227 1228 1229
    {
      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.
1230
	 Ideally we should also adjust left/top with visibleFrame.origin.  */
1231

1232 1233 1234 1235 1236
      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;
1237
#ifdef NS_IMPL_GNUSTEP
1238 1239
      if (f->left_pos < 100)
        f->left_pos = 100;  /* don't overlap menu */
1240
#endif
1241 1242 1243
      /* Constrain the setFrameTopLeftPoint so we don't move behind the
         menu bar.  */
      f->output_data.ns->dont_constrain = 0;
1244 1245
      [[view window] setFrameTopLeftPoint:
                       NSMakePoint (SCREENMAXBOUND (f->left_pos),
1246
                                    SCREENMAXBOUND ([fscreen frame].size.height
1247 1248 1249
                                                    - NS_TOP_POS (f)))];
      f->size_hint_flags &= ~(XNegative|YNegative);
    }
1250

1251
  unblock_input ();
1252 1253 1254 1255 1256 1257 1258 1259
}


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
1260
     internal clipping.
1261 1262 1263 1264 1265 1266 1267 1268 1269 1270
   -------------------------------------------------------------------------- */
{
  EmacsView *view = FRAME_NS_VIEW (f);
  NSWindow *window = [view window];
  NSRect wr = [window frame];
  int tb = FRAME_EXTERNAL_TOOL_BAR (f);
  int pixelwidth, pixelheight;

  NSTRACE (x_set_window_size);

1271
  if (view == nil)
1272 1273 1274 1275
    return;

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

1276
  block_input ();
1277 1278 1279 1280 1281 1282 1283 1284

  check_frame_size (f, &rows, &cols);

  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);
1285

1286
  /* If we have a toolbar, take its height into account. */
1287
  if (tb && ! [view isFullscreen])
1288
    {
1289 1290 1291
    /* 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 */
1292
    FRAME_TOOLBAR_HEIGHT (f) =
1293
      NSHeight ([window frameRectForContentRect: NSMakeRect (0, 0, 0, 0)])
1294
        - FRAME_NS_TITLEBAR_HEIGHT (f);
1295 1296 1297 1298
#ifdef NS_IMPL_GNUSTEP
      FRAME_TOOLBAR_HEIGHT (f) -= 3;
#endif
    }
1299
  else
1300
    FRAME_TOOLBAR_HEIGHT (f) = 0;
1301 1302

  wr.size.width = pixelwidth + f->border_width;
1303 1304 1305 1306
  wr.size.height = pixelheight;
  if (! [view isFullscreen])
    wr.size.height += FRAME_NS_TITLEBAR_HEIGHT (f)
      + FRAME_TOOLBAR_HEIGHT (f);
1307

1308 1309 1310 1311 1312 1313 1314
  /* 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;
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327

  [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..) */
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  {
    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];
  }
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  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 */

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

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  unblock_input ();
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}


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static void
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ns_fullscreen_hook (struct frame *f)
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{
  EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
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  if (!FRAME_VISIBLE_P (f))
    return;

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   if (! [view fsIsNative] && f->want_fullscreen == FULLSCREEN_BOTH)
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    {
      /* Old style fs don't initiate correctly if created from
         init/default-frame alist, so use a timer (not nice...).
      */
      [NSTimer scheduledTimerWithTimeInterval: 0.5 target: view
                                     selector: @selector (handleFS)
                                     userInfo: nil repeats: NO];
      return;
    }
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  block_input ();
  [view handleFS];
  unblock_input ();
}
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/* ==========================================================================

    Color management

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

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