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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;

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

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/* 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)                                                   \
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  {                                                                     \
    XSETFRAME (emacs_event->frame_or_window, emacsframe);               \
    EV_TRAILER2 (e);                                                    \
  }

#define EV_TRAILER2(e)                                                  \
  {                                                                     \
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      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
639
  block_input ();
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669

  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 ();
            }
        }
    }

670
  unblock_input ();
671 672
#endif
#endif
673 674 675
}


676 677 678 679
static void
ns_update_begin (struct frame *f)
/* --------------------------------------------------------------------------
   Prepare for a grouped sequence of drawing calls
680
   external (RIF) call; whole frame, called before update_window_begin
681 682 683 684 685
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
  NSTRACE (ns_update_begin);

686 687
  ns_update_auto_hide_menu_bar ();

688 689 690
  ns_updating_frame = f;
  [view lockFocus];

691 692 693 694
  /* 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.  */
695 696 697 698
#ifdef NS_IMPL_COCOA
  {
    NSBezierPath *bp;
    NSRect r = [view frame];
699 700 701 702 703 704 705 706 707 708 709 710
    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];
      }
711 712
  }
#endif
713

714 715 716 717 718 719 720 721 722 723
#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
724
   external (RIF) call; for one window, called after update_begin
725 726 727
   -------------------------------------------------------------------------- */
{
  struct frame *f = XFRAME (WINDOW_FRAME (w));
728 729
  Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);

730
  NSTRACE (ns_update_window_begin);
731
  w->output_cursor = w->cursor;
732

733
  block_input ();
734

735
  if (f == hlinfo->mouse_face_mouse_frame)
736 737
    {
      /* Don't do highlighting for mouse motion during the update.  */
738
      hlinfo->mouse_face_defer = 1;
739 740 741 742

        /* If the frame needs to be redrawn,
           simply forget about any prior mouse highlighting.  */
      if (FRAME_GARBAGED_P (f))
743
        hlinfo->mouse_face_window = Qnil;
744 745 746 747

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

748
  unblock_input ();
749 750 751 752
}


static void
753 754
ns_update_window_end (struct window *w, bool cursor_on_p,
                      bool mouse_face_overwritten_p)
755 756
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
757
   external (RIF) call; for one window called before update_end
758 759 760 761 762
   -------------------------------------------------------------------------- */
{
  /* note: this fn is nearly identical in all terms */
  if (!w->pseudo_window_p)
    {
763
      block_input ();
764 765 766

      if (cursor_on_p)
	display_and_set_cursor (w, 1,
767 768
				w->output_cursor.hpos, w->output_cursor.vpos,
				w->output_cursor.x, w->output_cursor.y);
769 770 771 772

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

773
      unblock_input ();
774 775 776 777 778
    }

  /* If a row with mouse-face was overwritten, arrange for
     frame_up_to_date to redisplay the mouse highlight.  */
  if (mouse_face_overwritten_p)
779
    reset_mouse_highlight (MOUSE_HL_INFO (XFRAME (w->frame)));
780 781 782 783 784 785 786 787 788

  NSTRACE (update_window_end);
}


static void
ns_update_end (struct frame *f)
/* --------------------------------------------------------------------------
   Finished a grouped sequence of drawing calls
789
   external (RIF) call; for whole frame, called after update_window_end
790 791
   -------------------------------------------------------------------------- */
{
792
  EmacsView *view = FRAME_NS_VIEW (f);
793

794
/*   if (f == MOUSE_HL_INFO (f)->mouse_face_mouse_frame) */
795
  MOUSE_HL_INFO (f)->mouse_face_defer = 0;
796

797
  block_input ();
798 799 800 801

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

802
  unblock_input ();
803 804 805 806 807 808 809 810
  ns_updating_frame = NULL;
  NSTRACE (ns_update_end);
}


static void
ns_flush (struct frame *f)
/* --------------------------------------------------------------------------
811
   external (RIF) call
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
   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.
   -------------------------------------------------------------------------- */
{
830
//  NSTRACE (ns_focus);
831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854
/* 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++; */
        }
    }

855
  /* clipping */
856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873
  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
   -------------------------------------------------------------------------- */
{
874
//  NSTRACE (ns_unfocus);
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895

  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
896 897
ns_clip_to_row (struct window *w, struct glyph_row *row,
		enum glyph_row_area area, BOOL gc)
898
/* --------------------------------------------------------------------------
899
     Internal (but parallels other terms): Focus drawing on given row
900 901 902 903 904 905 906 907
   -------------------------------------------------------------------------- */
{
  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);

908
  clip_rect.origin.x = window_x;
909 910
  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);
911
  clip_rect.size.width = window_width;
912 913 914 915 916 917 918
  clip_rect.size.height = row->visible_height;

  ns_focus (f, &clip_rect, 1);
}


static void
919
ns_ring_bell (struct frame *f)
920 921 922 923 924 925 926 927 928 929 930
/* --------------------------------------------------------------------------
     "Beep" routine
   -------------------------------------------------------------------------- */
{
  NSTRACE (ns_ring_bell);
  if (visible_bell)
    {
      NSAutoreleasePool *pool;
      struct frame *frame = SELECTED_FRAME ();
      NSView *view;

931
      block_input ();
932 933 934 935 936
      pool = [[NSAutoreleasePool alloc] init];

      view = FRAME_NS_VIEW (frame);
      if (view != nil)
        {
937 938 939 940 941 942 943 944 945 946 947 948 949 950
          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);
951 952
          [[view window] flushWindow];
          ns_timeout (150000);
953
          [[view window] restoreCachedImage];
954 955 956 957
          [[view window] flushWindow];
          ns_unfocus (frame);
        }
      [pool release];
958
      unblock_input ();
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
    }
  else
    {
      NSBeep ();
    }
}


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

974

975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996
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
   -------------------------------------------------------------------------- */
{
997 998 999
  NSView *view;
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
1000
  block_input ();
1001
  if (FRAME_VISIBLE_P (f))
1002
    [[view window] makeKeyAndOrderFront: NSApp];
1003
  unblock_input ();
1004 1005 1006 1007 1008 1009 1010 1011 1012
}


static void
ns_lower_frame (struct frame *f)
/* --------------------------------------------------------------------------
     Send window to back
   -------------------------------------------------------------------------- */
{
1013 1014 1015
  NSView *view;
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
1016
  block_input ();
1017
  [[view window] orderBack: NSApp];
1018
  unblock_input ();
1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043
}


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);
1044
  struct frame *old_highlight = dpyinfo->x_highlight_frame;
1045 1046

  NSTRACE (ns_frame_rehighlight);
1047
  if (dpyinfo->x_focus_frame)
1048
    {
1049 1050 1051 1052 1053
      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))
1054
        {
1055
          fset_focus_frame (dpyinfo->x_focus_frame, Qnil);
1056
          dpyinfo->x_highlight_frame = dpyinfo->x_focus_frame;
1057 1058 1059
        }
    }
  else
1060
      dpyinfo->x_highlight_frame = 0;
1061

1062 1063
  if (dpyinfo->x_highlight_frame &&
         dpyinfo->x_highlight_frame != old_highlight)
1064 1065
    {
      if (old_highlight)
1066
	{
1067
          x_update_cursor (old_highlight, 1);
1068 1069
	  x_set_frame_alpha (old_highlight);
	}
1070
      if (dpyinfo->x_highlight_frame)
1071
	{
1072
          x_update_cursor (dpyinfo->x_highlight_frame, 1);
1073 1074
          x_set_frame_alpha (dpyinfo->x_highlight_frame);
	}
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
    }
}


void
x_make_frame_visible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Show the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_make_frame_visible);
1086
  /* XXX: at some points in past this was not needed, as the only place that
1087 1088 1089
     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))
1090
    {
1091
      EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
1092 1093

      SET_FRAME_VISIBLE (f, 1);
1094
      ns_raise_frame (f);
1095 1096 1097

      /* Making a new frame from a fullscreen frame will make the new frame
         fullscreen also.  So skip handleFS as this will print an error.  */
1098 1099
      if ([view fsIsNative] && f->want_fullscreen == FULLSCREEN_BOTH
          && [view isFullscreen])
1100
        return;
1101

1102 1103 1104 1105 1106 1107
      if (f->want_fullscreen != FULLSCREEN_NONE)
        {
          block_input ();
          [view handleFS];
          unblock_input ();
        }
1108
    }
1109 1110 1111 1112 1113 1114 1115 1116 1117
}


void
x_make_frame_invisible (struct frame *f)
/* --------------------------------------------------------------------------
     External: Hide the window (X11 semantics)
   -------------------------------------------------------------------------- */
{
1118
  NSView *view;
1119
  NSTRACE (x_make_frame_invisible);
1120 1121
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
1122
  [[view window] orderOut: NSApp];
1123 1124
  SET_FRAME_VISIBLE (f, 0);
  SET_FRAME_ICONIFIED (f, 0);
1125 1126 1127 1128 1129 1130 1131 1132 1133
}


void
x_iconify_frame (struct frame *f)
/* --------------------------------------------------------------------------
     External: Iconify window
   -------------------------------------------------------------------------- */
{
1134 1135 1136
  NSView *view;
  struct ns_display_info *dpyinfo;

1137
  NSTRACE (x_iconify_frame);
1138 1139 1140
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
  dpyinfo = FRAME_NS_DISPLAY_INFO (f);
1141

1142 1143
  if (dpyinfo->x_highlight_frame == f)
    dpyinfo->x_highlight_frame = 0;
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159

  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];
}

1160
/* Free X resources of frame F.  */
1161 1162

void
1163
x_free_frame_resources (struct frame *f)
1164
{
1165 1166 1167 1168
  NSView *view;
  struct ns_display_info *dpyinfo;
  Mouse_HLInfo *hlinfo;

1169
  NSTRACE (x_free_frame_resources);
1170 1171 1172 1173
  check_window_system (f);
  view = FRAME_NS_VIEW (f);
  dpyinfo = FRAME_NS_DISPLAY_INFO (f);
  hlinfo = MOUSE_HL_INFO (f);
1174 1175 1176

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

1177
  block_input ();
1178 1179 1180 1181 1182 1183

  free_frame_menubar (f);

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

1184 1185 1186 1187
  if (f == dpyinfo->x_focus_frame)
    dpyinfo->x_focus_frame = 0;
  if (f == dpyinfo->x_highlight_frame)
    dpyinfo->x_highlight_frame = 0;
1188
  if (f == hlinfo->mouse_face_mouse_frame)
1189
    reset_mouse_highlight (hlinfo);
1190

1191 1192 1193
  if (f->output_data.ns->miniimage != nil)
    [f->output_data.ns->miniimage release];

1194 1195 1196
  [[view window] close];
  [view release];

1197 1198
  xfree (f->output_data.ns);

1199
  unblock_input ();
1200 1201
}

1202 1203 1204 1205 1206 1207 1208
void
x_destroy_window (struct frame *f)
/* --------------------------------------------------------------------------
     External: Delete the window
   -------------------------------------------------------------------------- */
{
  NSTRACE (x_destroy_window);
1209
  check_window_system (f);
1210 1211 1212 1213
  x_free_frame_resources (f);
  ns_window_num--;
}

1214 1215 1216 1217 1218 1219 1220 1221

void
x_set_offset (struct frame *f, int xoff, int yoff, int change_grav)
/* --------------------------------------------------------------------------
     External: Position the window
   -------------------------------------------------------------------------- */
{
  NSView *view = FRAME_NS_VIEW (f);
1222 1223 1224
  NSArray *screens = [NSScreen screens];
  NSScreen *fscreen = [screens objectAtIndex: 0];
  NSScreen *screen = [[view window] screen];
1225 1226 1227

  NSTRACE (x_set_offset);

1228
  block_input ();
1229 1230 1231

  f->left_pos = xoff;
  f->top_pos = yoff;
1232

1233
  if (view != nil && screen && fscreen)
1234 1235 1236 1237 1238
    {
      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.
1239
	 Ideally we should also adjust left/top with visibleFrame.origin.  */
1240

1241 1242 1243 1244 1245
      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;
1246
#ifdef NS_IMPL_GNUSTEP
1247 1248
      if (f->left_pos < 100)
        f->left_pos = 100;  /* don't overlap menu */
1249
#endif
1250 1251 1252
      /* Constrain the setFrameTopLeftPoint so we don't move behind the
         menu bar.  */
      f->output_data.ns->dont_constrain = 0;
1253 1254
      [[view window] setFrameTopLeftPoint:
                       NSMakePoint (SCREENMAXBOUND (f->left_pos),
1255
                                    SCREENMAXBOUND ([fscreen frame].size.height
1256 1257 1258
                                                    - NS_TOP_POS (f)))];
      f->size_hint_flags &= ~(XNegative|YNegative);
    }
1259

1260
  unblock_input ();
1261 1262 1263 1264 1265 1266 1267 1268
}


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
1269
     internal clipping.
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279
   -------------------------------------------------------------------------- */
{
  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);

1280
  if (view == nil)
1281 1282 1283 1284
    return;

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

1285
  block_input ();
1286 1287 1288 1289 1290 1291 1292 1293

  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);
1294

1295
  /* If we have a toolbar, take its height into account. */
1296
  if (tb && ! [view isFullscreen])
1297
    {
1298 1299 1300
    /* 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 */
1301
    FRAME_TOOLBAR_HEIGHT (f) =
1302
      NSHeight ([window frameRectForContentRect: NSMakeRect (0, 0, 0, 0)])
1303
        - FRAME_NS_TITLEBAR_HEIGHT (f);
1304 1305 1306 1307
#ifdef NS_IMPL_GNUSTEP
      FRAME_TOOLBAR_HEIGHT (f) -= 3;
#endif
    }
1308
  else
1309
    FRAME_TOOLBAR_HEIGHT (f) = 0;
1310 1311

  wr.size.width = pixelwidth + f->border_width;
1312 1313 1314 1315
  wr.size.height = pixelheight;
  if (! [view isFullscreen])
    wr.size.height += FRAME_NS_TITLEBAR_HEIGHT (f)
      + FRAME_TOOLBAR_HEIGHT (f);
1316

1317 1318 1319 1320 1321 1322 1323
  /* 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;