frame.c

/* Generic frame functions.
   Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003,
                 2004, 2005, 2006, 2007 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

#include <config.h>

#include <stdio.h>
#include "lisp.h"
#include "charset.h"
#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#endif
#ifdef WINDOWSNT
#include "w32term.h"
#endif
#ifdef MAC_OS
#include "macterm.h"
#endif
#include "buffer.h"
/* These help us bind and responding to switch-frame events.  */
#include "commands.h"
#include "keyboard.h"
#include "frame.h"
#ifdef HAVE_WINDOW_SYSTEM
#include "fontset.h"
#endif
#include "blockinput.h"
#include "termchar.h"
#include "termhooks.h"
#include "dispextern.h"
#include "window.h"
#ifdef MSDOS
#include "msdos.h"
#include "dosfns.h"
#endif


#ifdef HAVE_WINDOW_SYSTEM

/* The name we're using in resource queries.  Most often "emacs".  */

Lisp_Object Vx_resource_name;

/* The application class we're using in resource queries.
   Normally "Emacs".  */

Lisp_Object Vx_resource_class;

#endif

Lisp_Object Qframep, Qframe_live_p;
Lisp_Object Qicon, Qmodeline;
Lisp_Object Qonly;
Lisp_Object Qx, Qw32, Qmac, Qpc;
Lisp_Object Qvisible;
Lisp_Object Qdisplay_type;
Lisp_Object Qbackground_mode;

Lisp_Object Qx_frame_parameter;
Lisp_Object Qx_resource_name;
Lisp_Object Qterminal;
Lisp_Object Qterminal_live_p;

/* Frame parameters (set or reported).  */

Lisp_Object Qauto_raise, Qauto_lower;
Lisp_Object Qborder_color, Qborder_width;
Lisp_Object Qcursor_color, Qcursor_type;
Lisp_Object Qgeometry;  /* Not used */
Lisp_Object Qheight, Qwidth;
Lisp_Object Qleft, Qright;
Lisp_Object Qicon_left, Qicon_top, Qicon_type, Qicon_name;
Lisp_Object Qinternal_border_width;
Lisp_Object Qmouse_color;
Lisp_Object Qminibuffer;
Lisp_Object Qscroll_bar_width, Qvertical_scroll_bars;
Lisp_Object Qvisibility;
Lisp_Object Qscroll_bar_foreground, Qscroll_bar_background;
Lisp_Object Qscreen_gamma;
Lisp_Object Qline_spacing;
Lisp_Object Quser_position, Quser_size;
Lisp_Object Qwait_for_wm;
Lisp_Object Qwindow_id;
#ifdef HAVE_X_WINDOWS
Lisp_Object Qouter_window_id;
#endif
Lisp_Object Qparent_id;
Lisp_Object Qtitle, Qname;
Lisp_Object Qunsplittable;
Lisp_Object Qmenu_bar_lines, Qtool_bar_lines;
Lisp_Object Qleft_fringe, Qright_fringe;
Lisp_Object Qbuffer_predicate, Qbuffer_list, Qburied_buffer_list;
Lisp_Object Qtty_color_mode;
Lisp_Object Qtty, Qtty_type;
Lisp_Object Qwindow_system;
Lisp_Object Qenvironment;
Lisp_Object Qdisplay_environment_variable;

Lisp_Object Qfullscreen, Qfullwidth, Qfullheight, Qfullboth;

Lisp_Object Qinhibit_face_set_after_frame_default;
Lisp_Object Qface_set_after_frame_default;

Lisp_Object Vterminal_frame;
Lisp_Object Vdefault_frame_alist;
Lisp_Object Vdefault_frame_scroll_bars;
Lisp_Object Vmouse_position_function;
Lisp_Object Vmouse_highlight;
Lisp_Object Vdelete_frame_functions;

static void
set_menu_bar_lines_1 (window, n)
     Lisp_Object window;
     int n;
{
  struct window *w = XWINDOW (window);

  XSETFASTINT (w->last_modified, 0);
  XSETFASTINT (w->top_line, XFASTINT (w->top_line) + n);
  XSETFASTINT (w->total_lines, XFASTINT (w->total_lines) - n);

  if (INTEGERP (w->orig_top_line))
    XSETFASTINT (w->orig_top_line, XFASTINT (w->orig_top_line) + n);
  if (INTEGERP (w->orig_total_lines))
    XSETFASTINT (w->orig_total_lines, XFASTINT (w->orig_total_lines) - n);

  /* Handle just the top child in a vertical split.  */
  if (!NILP (w->vchild))
    set_menu_bar_lines_1 (w->vchild, n);

  /* Adjust all children in a horizontal split.  */
  for (window = w->hchild; !NILP (window); window = w->next)
    {
      w = XWINDOW (window);
      set_menu_bar_lines_1 (window, n);
    }
}

void
set_menu_bar_lines (f, value, oldval)
     struct frame *f;
     Lisp_Object value, oldval;
{
  int nlines;
  int olines = FRAME_MENU_BAR_LINES (f);

  /* Right now, menu bars don't work properly in minibuf-only frames;
     most of the commands try to apply themselves to the minibuffer
     frame itself, and get an error because you can't switch buffers
     in or split the minibuffer window.  */
  if (FRAME_MINIBUF_ONLY_P (f))
    return;

  if (INTEGERP (value))
    nlines = XINT (value);
  else
    nlines = 0;

  if (nlines != olines)
    {
      windows_or_buffers_changed++;
      FRAME_WINDOW_SIZES_CHANGED (f) = 1;
      FRAME_MENU_BAR_LINES (f) = nlines;
      set_menu_bar_lines_1 (f->root_window, nlines - olines);
      adjust_glyphs (f);
    }
}

Lisp_Object Vemacs_iconified;
Lisp_Object Vframe_list;

extern Lisp_Object Vminibuffer_list;
extern Lisp_Object get_minibuffer ();
extern Lisp_Object Fhandle_switch_frame ();
extern Lisp_Object Fredirect_frame_focus ();
extern Lisp_Object x_get_focus_frame ();

DEFUN ("framep", Fframep, Sframep, 1, 1, 0,
       doc: /* Return non-nil if OBJECT is a frame.
Value is t for a termcap frame (a character-only terminal),
`x' for an Emacs frame that is really an X window,
`w32' for an Emacs frame that is a window on MS-Windows display,
`mac' for an Emacs frame on a Macintosh display,
`pc' for a direct-write MS-DOS frame.
See also `frame-live-p'.  */)
     (object)
     Lisp_Object object;
{
  if (!FRAMEP (object))
    return Qnil;
  switch (XFRAME (object)->output_method)
    {
    case output_initial: /* The initial frame is like a termcap frame. */
    case output_termcap:
      return Qt;
    case output_x_window:
      return Qx;
    case output_w32:
      return Qw32;
    case output_msdos_raw:
      return Qpc;
    case output_mac:
      return Qmac;
    default:
      abort ();
    }
}

DEFUN ("frame-live-p", Fframe_live_p, Sframe_live_p, 1, 1, 0,
       doc: /* Return non-nil if OBJECT is a frame which has not been deleted.
Value is nil if OBJECT is not a live frame.  If object is a live
frame, the return value indicates what sort of terminal device it is
displayed on.  See the documentation of `framep' for possible
return values.  */)
     (object)
     Lisp_Object object;
{
  return ((FRAMEP (object)
	   && FRAME_LIVE_P (XFRAME (object)))
	  ? Fframep (object)
	  : Qnil);
}

DEFUN ("window-system", Fwindow_system, Swindow_system, 0, 1, 0,
       doc: /* The name of the window system that FRAME is displaying through.
The value is a symbol---for instance, 'x' for X windows.
The value is nil if Emacs is using a text-only terminal.

FRAME defaults to the currently selected frame.  */)
  (frame)
     Lisp_Object frame;
{
  Lisp_Object type;
  if (NILP (frame))
    frame = selected_frame;

  type = Fframep (frame);

  if (NILP (type))
    wrong_type_argument (Qframep, frame);

  if (EQ (type, Qt))
    return Qnil;
  else
    return type;
}      

struct frame *
make_frame (mini_p)
     int mini_p;
{
  Lisp_Object frame;
  register struct frame *f;
  register Lisp_Object root_window;
  register Lisp_Object mini_window;

  f = allocate_frame ();
  XSETFRAME (frame, f);

  f->desired_matrix = 0;
  f->current_matrix = 0;
  f->desired_pool = 0;
  f->current_pool = 0;
  f->glyphs_initialized_p = 0;
  f->decode_mode_spec_buffer = 0;
  f->visible = 0;
  f->async_visible = 0;
  f->output_data.nothing = 0;
  f->iconified = 0;
  f->async_iconified = 0;
  f->wants_modeline = 1;
  f->auto_raise = 0;
  f->auto_lower = 0;
  f->no_split = 0;
  f->garbaged = 1;
  f->has_minibuffer = mini_p;
  f->focus_frame = Qnil;
  f->explicit_name = 0;
  f->can_have_scroll_bars = 0;
  f->vertical_scroll_bar_type = vertical_scroll_bar_none;
  f->param_alist = Qnil;
  f->scroll_bars = Qnil;
  f->condemned_scroll_bars = Qnil;
  f->face_alist = Qnil;
  f->face_cache = NULL;
  f->menu_bar_items = Qnil;
  f->menu_bar_vector = Qnil;
  f->menu_bar_items_used = 0;
  f->buffer_predicate = Qnil;
  f->buffer_list = Qnil;
  f->buried_buffer_list = Qnil;
  f->namebuf = 0;
  f->title = Qnil;
  f->menu_bar_window = Qnil;
  f->tool_bar_window = Qnil;
  f->tool_bar_items = Qnil;
  f->desired_tool_bar_string = f->current_tool_bar_string = Qnil;
  f->n_tool_bar_items = 0;
  f->left_fringe_width = f->right_fringe_width = 0;
  f->fringe_cols = 0;
  f->scroll_bar_actual_width = 0;
  f->border_width = 0;
  f->internal_border_width = 0;
  f->column_width = 1;  /* !FRAME_WINDOW_P value */
  f->line_height = 1;  /* !FRAME_WINDOW_P value */
  f->x_pixels_diff = f->y_pixels_diff = 0;
#ifdef HAVE_WINDOW_SYSTEM
  f->want_fullscreen = FULLSCREEN_NONE;
#endif
  f->size_hint_flags = 0;
  f->win_gravity = 0;

  root_window = make_window ();
  if (mini_p)
    {
      mini_window = make_window ();
      XWINDOW (root_window)->next = mini_window;
      XWINDOW (mini_window)->prev = root_window;
      XWINDOW (mini_window)->mini_p = Qt;
      XWINDOW (mini_window)->frame = frame;
      f->minibuffer_window = mini_window;
    }
  else
    {
      mini_window = Qnil;
      XWINDOW (root_window)->next = Qnil;
      f->minibuffer_window = Qnil;
    }

  XWINDOW (root_window)->frame = frame;

  /* 10 is arbitrary,
     just so that there is "something there."
     Correct size will be set up later with change_frame_size.  */

  SET_FRAME_COLS (f, 10);
  FRAME_LINES (f) = 10;

  XSETFASTINT (XWINDOW (root_window)->total_cols, 10);
  XSETFASTINT (XWINDOW (root_window)->total_lines, (mini_p ? 9 : 10));

  if (mini_p)
    {
      XSETFASTINT (XWINDOW (mini_window)->total_cols, 10);
      XSETFASTINT (XWINDOW (mini_window)->top_line, 9);
      XSETFASTINT (XWINDOW (mini_window)->total_lines, 1);
    }

  /* Choose a buffer for the frame's root window.  */
  {
    Lisp_Object buf;

    XWINDOW (root_window)->buffer = Qt;
    buf = Fcurrent_buffer ();
    /* If buf is a 'hidden' buffer (i.e. one whose name starts with
       a space), try to find another one.  */
    if (SREF (Fbuffer_name (buf), 0) == ' ')
      buf = Fother_buffer (buf, Qnil, Qnil);

    /* Use set_window_buffer, not Fset_window_buffer, and don't let
       hooks be run by it.  The reason is that the whole frame/window
       arrangement is not yet fully intialized at this point.  Windows
       don't have the right size, glyph matrices aren't initialized
       etc.  Running Lisp functions at this point surely ends in a
       SEGV.  */
    set_window_buffer (root_window, buf, 0, 0);
    f->buffer_list = Fcons (buf, Qnil);
  }

  if (mini_p)
    {
      XWINDOW (mini_window)->buffer = Qt;
      set_window_buffer (mini_window,
			 (NILP (Vminibuffer_list)
			  ? get_minibuffer (0)
			  : Fcar (Vminibuffer_list)),
			 0, 0);
    }

  f->root_window = root_window;
  f->selected_window = root_window;
  /* Make sure this window seems more recently used than
     a newly-created, never-selected window.  */
  ++window_select_count;
  XSETFASTINT (XWINDOW (f->selected_window)->use_time, window_select_count);

  f->default_face_done_p = 0;

  return f;
}

#ifdef HAVE_WINDOW_SYSTEM
/* Make a frame using a separate minibuffer window on another frame.
   MINI_WINDOW is the minibuffer window to use.  nil means use the
   default (the global minibuffer).  */

struct frame *
make_frame_without_minibuffer (mini_window, kb, display)
     register Lisp_Object mini_window;
     KBOARD *kb;
     Lisp_Object display;
{
  register struct frame *f;
  struct gcpro gcpro1;

  if (!NILP (mini_window))
    CHECK_LIVE_WINDOW (mini_window);

#ifdef MULTI_KBOARD
  if (!NILP (mini_window)
      && FRAME_KBOARD (XFRAME (XWINDOW (mini_window)->frame)) != kb)
    error ("Frame and minibuffer must be on the same terminal");
#endif

  /* Make a frame containing just a root window.  */
  f = make_frame (0);

  if (NILP (mini_window))
    {
      /* Use default-minibuffer-frame if possible.  */
      if (!FRAMEP (kb->Vdefault_minibuffer_frame)
	  || ! FRAME_LIVE_P (XFRAME (kb->Vdefault_minibuffer_frame)))
	{
          Lisp_Object frame_dummy;

          XSETFRAME (frame_dummy, f);
          GCPRO1 (frame_dummy);
	  /* If there's no minibuffer frame to use, create one.  */
	  kb->Vdefault_minibuffer_frame =
	    call1 (intern ("make-initial-minibuffer-frame"), display);
          UNGCPRO;
	}

      mini_window = XFRAME (kb->Vdefault_minibuffer_frame)->minibuffer_window;
    }

  f->minibuffer_window = mini_window;

  /* Make the chosen minibuffer window display the proper minibuffer,
     unless it is already showing a minibuffer.  */
  if (NILP (Fmemq (XWINDOW (mini_window)->buffer, Vminibuffer_list)))
    Fset_window_buffer (mini_window,
			(NILP (Vminibuffer_list)
			 ? get_minibuffer (0)
			 : Fcar (Vminibuffer_list)), Qnil);
  return f;
}

/* Make a frame containing only a minibuffer window.  */

struct frame *
make_minibuffer_frame ()
{
  /* First make a frame containing just a root window, no minibuffer.  */

  register struct frame *f = make_frame (0);
  register Lisp_Object mini_window;
  register Lisp_Object frame;

  XSETFRAME (frame, f);

  f->auto_raise = 0;
  f->auto_lower = 0;
  f->no_split = 1;
  f->wants_modeline = 0;
  f->has_minibuffer = 1;

  /* Now label the root window as also being the minibuffer.
     Avoid infinite looping on the window chain by marking next pointer
     as nil. */

  mini_window = f->minibuffer_window = f->root_window;
  XWINDOW (mini_window)->mini_p = Qt;
  XWINDOW (mini_window)->next = Qnil;
  XWINDOW (mini_window)->prev = Qnil;
  XWINDOW (mini_window)->frame = frame;

  /* Put the proper buffer in that window.  */

  Fset_window_buffer (mini_window,
		      (NILP (Vminibuffer_list)
		       ? get_minibuffer (0)
		       : Fcar (Vminibuffer_list)), Qnil);
  return f;
}
#endif /* HAVE_WINDOW_SYSTEM */

/* Construct a frame that refers to a terminal.  */

static int tty_frame_count;

struct frame *
make_initial_frame (void)
{
  struct frame *f;
  struct terminal *terminal;
  Lisp_Object frame;

#ifdef MULTI_KBOARD
  /* Create the initial keyboard. */
  if (!initial_kboard)
    {
      initial_kboard = (KBOARD *) xmalloc (sizeof (KBOARD));
      init_kboard (initial_kboard);
      initial_kboard->next_kboard = all_kboards;
      all_kboards = initial_kboard;
    }
#endif

  /* The first call must initialize Vframe_list.  */
  if (! (NILP (Vframe_list) || CONSP (Vframe_list)))
    Vframe_list = Qnil;

  terminal = init_initial_terminal ();

  f = make_frame (1);
  XSETFRAME (frame, f);

  Vframe_list = Fcons (frame, Vframe_list);

  tty_frame_count = 1;
  f->name = build_string ("F1");

  f->visible = 1;
  f->async_visible = 1;

  f->output_method = terminal->type;
  f->terminal = terminal;
  f->terminal->reference_count++;
  f->output_data.nothing = 0;
  
  FRAME_FOREGROUND_PIXEL (f) = FACE_TTY_DEFAULT_FG_COLOR;
  FRAME_BACKGROUND_PIXEL (f) = FACE_TTY_DEFAULT_BG_COLOR;
    
  FRAME_CAN_HAVE_SCROLL_BARS (f) = 0;
  FRAME_VERTICAL_SCROLL_BAR_TYPE (f) = vertical_scroll_bar_none;

  return f;
}


struct frame *
make_terminal_frame (struct terminal *terminal)
{
  register struct frame *f;
  Lisp_Object frame;
  char name[20];

  if (terminal->deleted)
    error ("Terminal is being deleted, can't create new frames on it");

  f = make_frame (1);

  XSETFRAME (frame, f);
  Vframe_list = Fcons (frame, Vframe_list);

  tty_frame_count++;
  sprintf (name, "F%d", tty_frame_count);
  f->name = build_string (name);

  f->visible = 1;		/* FRAME_SET_VISIBLE wd set frame_garbaged. */
  f->async_visible = 1;		/* Don't let visible be cleared later. */
#ifdef MSDOS
  f->output_data.x = &the_only_x_display;
  if (!inhibit_window_system
      && (!FRAMEP (selected_frame) || !FRAME_LIVE_P (XFRAME (selected_frame))
	  || XFRAME (selected_frame)->output_method == output_msdos_raw))
    {
      f->output_method = output_msdos_raw;
      /* This initialization of foreground and background pixels is
	 only important for the initial frame created in temacs.  If
	 we don't do that, we get black background and foreground in
	 the dumped Emacs because the_only_x_display is a static
	 variable, hence it is born all-zeroes, and zero is the code
	 for the black color.  Other frames all inherit their pixels
	 from what's already in the_only_x_display.  */
      if ((!FRAMEP (selected_frame) || !FRAME_LIVE_P (XFRAME (selected_frame)))
	  && FRAME_BACKGROUND_PIXEL (f) == 0
	  && FRAME_FOREGROUND_PIXEL (f) == 0)
	{
	  FRAME_BACKGROUND_PIXEL (f) = FACE_TTY_DEFAULT_BG_COLOR;
	  FRAME_FOREGROUND_PIXEL (f) = FACE_TTY_DEFAULT_FG_COLOR;
	}
    }
  else
    f->output_method = output_termcap;
#else
#ifdef WINDOWSNT
  f->output_method = output_termcap;
  f->terminal = terminal;
  f->terminal->reference_count++;
  create_w32cons_output (f);
#else
#ifdef MAC_OS8
  make_mac_terminal_frame (f);
#else
  {
    f->output_method = output_termcap;
    f->terminal = terminal;
    f->terminal->reference_count++;
    create_tty_output (f);
    
    FRAME_FOREGROUND_PIXEL (f) = FACE_TTY_DEFAULT_FG_COLOR;
    FRAME_BACKGROUND_PIXEL (f) = FACE_TTY_DEFAULT_BG_COLOR;
    
    FRAME_CAN_HAVE_SCROLL_BARS (f) = 0;
    FRAME_VERTICAL_SCROLL_BAR_TYPE (f) = vertical_scroll_bar_none;

    /* Set the top frame to the newly created frame. */
    if (FRAMEP (FRAME_TTY (f)->top_frame)
        && FRAME_LIVE_P (XFRAME (FRAME_TTY (f)->top_frame)))
      XFRAME (FRAME_TTY (f)->top_frame)->async_visible = 2; /* obscured */
    
    FRAME_TTY (f)->top_frame = frame;
  }
  
#ifdef CANNOT_DUMP
  FRAME_FOREGROUND_PIXEL(f) = FACE_TTY_DEFAULT_FG_COLOR;
  FRAME_BACKGROUND_PIXEL(f) = FACE_TTY_DEFAULT_BG_COLOR;
#endif
#endif /* MAC_OS8 */
#endif /* WINDOWSNT */
#endif /* MSDOS */

  if (!noninteractive)
    init_frame_faces (f);

  return f;
}

/* Get a suitable value for frame parameter PARAMETER for a newly
   created frame, based on (1) the user-supplied frame parameter
   alist SUPPLIED_PARMS, (2) CURRENT_VALUE, and finally, if all else
   fails, (3) Vdefault_frame_alist.  */

static Lisp_Object
get_future_frame_param (Lisp_Object parameter,
                        Lisp_Object supplied_parms,
                        char *current_value)
{
  Lisp_Object result;

  result = Fassq (parameter, supplied_parms);
  if (NILP (result))
    result = Fassq (parameter, XFRAME (selected_frame)->param_alist);
  if (NILP (result) && current_value != NULL)
    result = build_string (current_value);
  if (NILP (result))
    result = Fassq (parameter, Vdefault_frame_alist);
  if (!NILP (result) && !STRINGP (result))
    result = XCDR (result);
  if (NILP (result) || !STRINGP (result))
    result = Qnil;

  return result;
}

DEFUN ("make-terminal-frame", Fmake_terminal_frame, Smake_terminal_frame,
       1, 1, 0,
       doc: /* Create an additional terminal frame, possibly on another terminal.
This function takes one argument, an alist specifying frame parameters.

You can create multiple frames on a single text-only terminal, but
only one of them (the selected terminal frame) is actually displayed.

In practice, generally you don't need to specify any parameters,
except when you want to create a new frame on another terminal.
In that case, the `tty' parameter specifies the device file to open,
and the `tty-type' parameter specifies the terminal type.  Example:

   (make-terminal-frame '((tty . "/dev/pts/5") (tty-type . "xterm")))

Note that changing the size of one terminal frame automatically
affects all frames on the same terminal device.  */)
     (parms)
     Lisp_Object parms;
{
  struct frame *f;
  struct terminal *t = NULL;
  Lisp_Object frame, tem;
  struct frame *sf = SELECTED_FRAME ();

#ifdef MSDOS
  if (sf->output_method != output_msdos_raw
      && sf->output_method != output_termcap)
    abort ();
#else /* not MSDOS */

#if 0 /* #ifdef MAC_OS */
  /* This can happen for multi-tty when using both terminal frames and
     Carbon frames. */
  if (sf->output_method != output_mac)
    error ("Not running on a Macintosh screen; cannot make a new Macintosh frame");
#else
#if 0                           /* This should work now! */
  if (sf->output_method != output_termcap)
    error ("Not using an ASCII terminal now; cannot make a new ASCII frame");
#endif
#endif
#endif /* not MSDOS */
  
  {
    Lisp_Object terminal;

    terminal = Fassq (Qterminal, parms);
    if (!NILP (terminal))
      {
        terminal = XCDR (terminal);
        t = get_terminal (terminal, 1);
      }
  }
  
  if (!t)
    { 
      char *name = 0, *type = 0;
      Lisp_Object tty, tty_type;

      tty = get_future_frame_param
        (Qtty, parms, (FRAME_TERMCAP_P (XFRAME (selected_frame))
                       ? FRAME_TTY (XFRAME (selected_frame))->name
                       : NULL));
      if (!NILP (tty))
        {
          name = (char *) alloca (SBYTES (tty) + 1);
          strncpy (name, SDATA (tty), SBYTES (tty));
          name[SBYTES (tty)] = 0;
        }
      
      tty_type = get_future_frame_param
        (Qtty_type, parms, (FRAME_TERMCAP_P (XFRAME (selected_frame))
                            ? FRAME_TTY (XFRAME (selected_frame))->type
                            : NULL));
      if (!NILP (tty_type))
        {
          type = (char *) alloca (SBYTES (tty_type) + 1);
          strncpy (type, SDATA (tty_type), SBYTES (tty_type));
          type[SBYTES (tty_type)] = 0;
        }

      t = init_tty (name, type, 0); /* Errors are not fatal. */
    }

  f = make_terminal_frame (t);

  {
    int width, height;
    get_tty_size (fileno (FRAME_TTY (f)->input), &width, &height);
    change_frame_size (f, height, width, 0, 0, 0);
  }
  
  adjust_glyphs (f);
  calculate_costs (f);
  XSETFRAME (frame, f);
  Fmodify_frame_parameters (frame, Vdefault_frame_alist);
  Fmodify_frame_parameters (frame, parms);
  Fmodify_frame_parameters (frame, Fcons (Fcons (Qwindow_system, Qnil), Qnil));
  Fmodify_frame_parameters (frame, Fcons (Fcons (Qtty_type,
                                                 build_string (t->display_info.tty->type)),
                                          Qnil));
  if (t->display_info.tty->name != NULL)
    Fmodify_frame_parameters (frame, Fcons (Fcons (Qtty,
                                                   build_string (t->display_info.tty->name)),
                                            Qnil));
  else
    Fmodify_frame_parameters (frame, Fcons (Fcons (Qtty, Qnil), Qnil));
  
  /* Make the frame face alist be frame-specific, so that each
     frame could change its face definitions independently.  */
  f->face_alist = Fcopy_alist (sf->face_alist);
  /* Simple Fcopy_alist isn't enough, because we need the contents of
     the vectors which are the CDRs of associations in face_alist to
     be copied as well.  */
  for (tem = f->face_alist; CONSP (tem); tem = XCDR (tem))
    XSETCDR (XCAR (tem), Fcopy_sequence (XCDR (XCAR (tem))));
  return frame;
}


/* Perform the switch to frame FRAME.

   If FRAME is a switch-frame event `(switch-frame FRAME1)', use
   FRAME1 as frame.

   If TRACK is non-zero and the frame that currently has the focus
   redirects its focus to the selected frame, redirect that focused
   frame's focus to FRAME instead.

   FOR_DELETION non-zero means that the selected frame is being
   deleted, which includes the possibility that the frame's terminal
   is dead.  */

Lisp_Object
do_switch_frame (frame, track, for_deletion)
     Lisp_Object frame;
     int track, for_deletion;
{
  struct frame *sf = SELECTED_FRAME ();

  /* If FRAME is a switch-frame event, extract the frame we should
     switch to.  */
  if (CONSP (frame)
      && EQ (XCAR (frame), Qswitch_frame)
      && CONSP (XCDR (frame)))
    frame = XCAR (XCDR (frame));

  /* This used to say CHECK_LIVE_FRAME, but apparently it's possible for
     a switch-frame event to arrive after a frame is no longer live,
     especially when deleting the initial frame during startup.  */
  CHECK_FRAME (frame);
  if (! FRAME_LIVE_P (XFRAME (frame)))
    return Qnil;

  if (sf == XFRAME (frame))
    return frame;

  /* This is too greedy; it causes inappropriate focus redirection
     that's hard to get rid of.  */
#if 0
  /* If a frame's focus has been redirected toward the currently
     selected frame, we should change the redirection to point to the
     newly selected frame.  This means that if the focus is redirected
     from a minibufferless frame to a surrogate minibuffer frame, we
     can use `other-window' to switch between all the frames using
     that minibuffer frame, and the focus redirection will follow us
     around.  */
  if (track)
    {
      Lisp_Object tail;

      for (tail = Vframe_list; CONSP (tail); tail = XCDR (tail))
	{
	  Lisp_Object focus;

	  if (!FRAMEP (XCAR (tail)))
	    abort ();

	  focus = FRAME_FOCUS_FRAME (XFRAME (XCAR (tail)));

	  if (FRAMEP (focus) && XFRAME (focus) == SELECTED_FRAME ())
	    Fredirect_frame_focus (XCAR (tail), frame);
	}
    }
#else /* ! 0 */
  /* Instead, apply it only to the frame we're pointing to.  */
#ifdef HAVE_WINDOW_SYSTEM
  if (track && FRAME_WINDOW_P (XFRAME (frame)))
    {
      Lisp_Object focus, xfocus;

      xfocus = x_get_focus_frame (XFRAME (frame));
      if (FRAMEP (xfocus))
	{
	  focus = FRAME_FOCUS_FRAME (XFRAME (xfocus));
	  if (FRAMEP (focus) && XFRAME (focus) == SELECTED_FRAME ())
	    Fredirect_frame_focus (xfocus, frame);
	}
    }
#endif /* HAVE_X_WINDOWS */
#endif /* ! 0 */

  if (!for_deletion && FRAME_HAS_MINIBUF_P (sf))
    resize_mini_window (XWINDOW (FRAME_MINIBUF_WINDOW (sf)), 1);

  if (FRAME_TERMCAP_P (XFRAME (selected_frame))
      && FRAME_TERMCAP_P (XFRAME (frame))
      && FRAME_TTY (XFRAME (selected_frame)) == FRAME_TTY (XFRAME (frame)))
    {
      XFRAME (selected_frame)->async_visible = 2; /* obscured */
      XFRAME (frame)->async_visible = 1;
      FRAME_TTY (XFRAME (frame))->top_frame = frame;
    }

  selected_frame = frame;
  if (! FRAME_MINIBUF_ONLY_P (XFRAME (selected_frame)))
    last_nonminibuf_frame = XFRAME (selected_frame);

  Fselect_window (XFRAME (frame)->selected_window, Qnil);

#ifndef WINDOWSNT
  /* Make sure to switch the tty color mode to that of the newly
     selected frame.  */
  sf = SELECTED_FRAME ();
  if (FRAME_TERMCAP_P (sf))
    {
      Lisp_Object color_mode_spec, color_mode;

      color_mode_spec = assq_no_quit (Qtty_color_mode, sf->param_alist);
      if (CONSP (color_mode_spec))
	color_mode = XCDR (color_mode_spec);
      else
	color_mode = make_number (0);
      set_tty_color_mode (sf, color_mode);
    }
#endif /* !WINDOWSNT */

  /* We want to make sure that the next event generates a frame-switch
     event to the appropriate frame.  This seems kludgy to me, but
     before you take it out, make sure that evaluating something like
     (select-window (frame-root-window (new-frame))) doesn't end up
     with your typing being interpreted in the new frame instead of
     the one you're actually typing in.  */
  internal_last_event_frame = Qnil;

  return frame;
}

DEFUN ("select-frame", Fselect_frame, Sselect_frame, 1, 1, "e",
       doc: /* Select the frame FRAME.
Subsequent editing commands apply to its selected window.
The selection of FRAME lasts until the next time the user does
something to select a different frame, or until the next time this
function is called.  If you are using a window system, the previously
selected frame may be restored as the selected frame after return to
the command loop, because it still may have the window system's input
focus.  On a text-only terminal, the next redisplay will display FRAME.

This function returns FRAME, or nil if FRAME has been deleted.  */)
  (frame)
    Lisp_Object frame;
{
  return do_switch_frame (frame, 1, 0);
}


DEFUN ("handle-switch-frame", Fhandle_switch_frame, Shandle_switch_frame, 1, 1, "e",
       doc: /* Handle a switch-frame event EVENT.
Switch-frame events are usually bound to this function.
A switch-frame event tells Emacs that the window manager has requested
that the user's events be directed to the frame mentioned in the event.
This function selects the selected window of the frame of EVENT.

If EVENT is frame object, handle it as if it were a switch-frame event
to that frame.  */)
     (event)
     Lisp_Object event;
{
  /* Preserve prefix arg that the command loop just cleared.  */
  current_kboard->Vprefix_arg = Vcurrent_prefix_arg;
  call1 (Vrun_hooks, Qmouse_leave_buffer_hook);
  return do_switch_frame (event, 0, 0);
}

DEFUN ("selected-frame", Fselected_frame, Sselected_frame, 0, 0, 0,
       doc: /* Return the frame that is now selected.  */)
     ()
{
  return selected_frame;
}

DEFUN ("window-frame", Fwindow_frame, Swindow_frame, 1, 1, 0,
       doc: /* Return the frame object that window WINDOW is on.  */)
     (window)
     Lisp_Object window;
{
  CHECK_LIVE_WINDOW (window);
  return XWINDOW (window)->frame;
}

DEFUN ("frame-first-window", Fframe_first_window, Sframe_first_window, 0, 1, 0,
       doc: /* Returns the topmost, leftmost window of FRAME.
If omitted, FRAME defaults to the currently selected frame.  */)
     (frame)
     Lisp_Object frame;
{
  Lisp_Object w;

  if (NILP (frame))
    w = SELECTED_FRAME ()->root_window;
  else
    {
      CHECK_LIVE_FRAME (frame);
      w = XFRAME (frame)->root_window;
    }
  while (NILP (XWINDOW (w)->buffer))
    {
      if (! NILP (XWINDOW (w)->hchild))
	w = XWINDOW (w)->hchild;
      else if (! NILP (XWINDOW (w)->vchild))
	w = XWINDOW (w)->vchild;
      else
	abort ();
    }
  return w;
}