Source

xemacs-beta / src / device.h

/* Define device-object for XEmacs.
   Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
   Copyright (C) 1995 Ben Wing
   Copyright (C) 1995 Sun Microsystems

This file is part of XEmacs.

XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Written by Chuck Thompson and Ben Wing. */

#ifndef _XEMACS_DEVICE_H_
#define _XEMACS_DEVICE_H_

#include "console.h"

/* This should really be in redisplay.h but by putting it here we
   won't have to ensure that redisplay.h is always included before
   this file. */
struct pixel_to_glyph_translation_cache
{
  unsigned int valid :1;
  struct frame *frame;
  int low_x_coord, high_x_coord, col, obj_x;
  int low_y_coord, high_y_coord, row, obj_y;
  struct window *w;
  Bufpos bufpos;
  Bufpos closest;
  Charcount modeline_closest;
  Lisp_Object obj1, obj2;
  int retval;
};

#define DEVICE_TYPE_NAME(d) ((d)->devmeths->name)
#define DEVICE_TYPE(d) ((d)->devmeths->symbol)
#define DEVICE_SPECIFIC_FRAME_PROPS(d) \
  ((d)->devmeths->device_specific_frame_props)

/******** Accessing / calling a device method *********/

#define HAS_DEVMETH_P(d, m) HAS_CONTYPE_METH_P ((d)->devmeths, m)
#define DEVMETH(d, m, args) CONTYPE_METH ((d)->devmeths, m, args)
#define MAYBE_DEVMETH(d, m, args) MAYBE_CONTYPE_METH ((d)->devmeths, m, args)
#define DEVMETH_OR_GIVEN(d, m, args, given) \
  CONTYPE_METH_OR_GIVEN((d)->devmeths, m, args, given)
#define MAYBE_INT_DEVMETH(d, m, args) \
  MAYBE_INT_CONTYPE_METH ((d)->devmeths, m, args)
#define MAYBE_LISP_DEVMETH(d, m, args) \
  MAYBE_LISP_CONTYPE_METH ((d)->devmeths, m, args)

struct device
{
  struct lcrecord_header header;

  /* Methods for this device's console.  This can also be retrieved
     through device->console, but it's faster this way. */
  struct console_methods *devmeths;

  /* Name of this device, for resourcing and printing purposes.
     If not explicitly given, it's initialized in a device-specific
     manner. */
  Lisp_Object name;

  /* What this device is connected to */
  Lisp_Object connection;

  /* A canonical name for the connection that is used to determine
     whether `make-device' is being called on an existing device. */
  Lisp_Object canon_connection;

  /* List of frames on this device. */
  Lisp_Object frame_list;

  /* The console this device is on. */
  Lisp_Object console;

  /* Frame which is "currently selected".  This is what `selected-frame'
     returns and is the default frame for many operations.  This may
     not be the same as frame_with_focus; `select-frame' changes the
     selected_frame but not the frame_with_focus.  However, eventually
     either the two values will be the same, or frame_with_focus will
     be nil: right before waiting for an event, the focus is changed
     to point to the selected_frame if XEmacs currently has the focus
     on this device.  Note that frame_with_focus may be nil (none of the
     frames on this device have the window-system focus), but
     selected_frame will never be nil if there are any frames on
     the device. */
  Lisp_Object _selected_frame;
  /* Frame that currently contains the window-manager focus, or none.
     Note that we've split frame_with_focus into two variables.
     frame_with_focus_real is the value we use most of the time,
     but frame_with_focus_for_hooks is used for running the select-frame-hook
     and deselect-frame-hook.  We do this because we split the focus handling
     into two parts: one part (deals with drawing the solid/box cursor)
     runs as soon as a focus event is received; the other (running the
     hooks) runs after any pending sit-for/sleep-for/accept-process-output
     calls are done. */
  Lisp_Object frame_with_focus_real;
  Lisp_Object frame_with_focus_for_hooks;
  /* If we have recently issued a request to change the focus as a
     result of select-frame having been called, the following variable
     records the frame we are trying to focus on.  The reason for this
     is that the window manager may not grant our request to change
     the focus (so we can't just change frame_with_focus), and we don't
     want to keep sending requests again and again to the window manager.
     This variable is reset whenever a focus-change event is seen. */
  Lisp_Object frame_that_ought_to_have_focus;

  /* Color class of this device. */
  Lisp_Object device_class;

  /* Alist of values for user-defined tags in this device. */
  Lisp_Object user_defined_tags;

  /* Hash tables for device-specific objects (fonts, colors, etc).
     These are key-weak hash tables (or hash tables containing key-weak
     hash tables) so that they disappear when the key goes away. */

  /* This is a simple key-weak hash table hashing color names to
     instances. */
  Lisp_Object color_instance_cache;

  /* This is a simple key-weak hash table hashing font names to
     instances. */
  Lisp_Object font_instance_cache;

  /* This is a bi-level cache, where the hash table in this slot here
     indexes image-instance-type masks (there are currently 6
     image-instance types and thus 64 possible masks) to key-weak hash
     tables like the one for colors. */
  Lisp_Object image_instance_cache;

  /* A structure of auxiliary data specific to the device type.
     struct x_device is used for X window frames; defined in console-x.h
     struct tty_device is used to TTY's; defined in console-tty.h */
  void *device_data;

  /* redisplay flags */
  unsigned int buffers_changed :1;
  unsigned int clip_changed :1;
  unsigned int extents_changed :1;
  unsigned int faces_changed :1;
  unsigned int frame_changed :1;
  unsigned int icon_changed :1;
  unsigned int menubar_changed :1;
  unsigned int modeline_changed :1;
  unsigned int point_changed :1;
  unsigned int size_changed :1;
  unsigned int toolbar_changed :1;
  unsigned int windows_changed :1;
  unsigned int windows_structure_changed :1;

  unsigned int locked :1;

  /* Cache information about last pixel position translated to a
     glyph.  The law of locality applies very heavily here so caching
     the value leads to a significant win.  At the moment this is
     really X specific but once we have generic mouse support it won't
     be. */
  struct pixel_to_glyph_translation_cache pixel_to_glyph_cache;

  /* Output baud rate of device; used for redisplay decisions.  */
  int baud_rate;

  /* sound flags */
  unsigned int on_console_p :1;
  unsigned int connected_to_nas_p :1;

#ifdef HAVE_UNIXOID_EVENT_LOOP
  /* File descriptors for input and output.  Much of the time
     (but not always) these will be the same.  For an X device,
     these both hold the file descriptor of the socket used
     to communicate with the X server.  For a TTY device, these
     may or may not be the same and point to the terminal that
     is used for I/O. */
  int infd, outfd;

  /* holds some data necessary for SIGIO control.  Perhaps this should
     be inside of device_data; but it is used for both TTY's and X
     device.  Perhaps it should be conditionalized on SIGIO; but
     this requires including syssignal.h and systty.h. */
  int old_sigio_flag;
  int old_fcntl_owner;
  unsigned int sigio_enabled :1;
#endif
};

DECLARE_LRECORD (device, struct device);
#define XDEVICE(x) XRECORD (x, device, struct device)
#define XSETDEVICE(x, p) XSETRECORD (x, p, device)
#define DEVICEP(x) RECORDP (x, device)
#define GC_DEVICEP(x) GC_RECORDP (x, device)
#define CHECK_DEVICE(x) CHECK_RECORD (x, device)
#define CONCHECK_DEVICE(x) CONCHECK_RECORD (x, device)

#define CHECK_LIVE_DEVICE(x)						\
  do { CHECK_DEVICE (x);						\
       if (! DEVICEP (x)						\
	   || ! DEVICE_LIVE_P (XDEVICE (x)))				\
         dead_wrong_type_argument (Qdevice_live_p, (x)); } while (0)
#define CONCHECK_LIVE_DEVICE(x)						\
  do { CONCHECK_DEVICE (x);						\
       if (! DEVICEP (x)						\
	   || ! DEVICE_LIVE_P (XDEVICE (x)))				\
         x = wrong_type_argument (Qdevice_live_p, (x)); } while (0)

#define DEVICE_TYPE_P(d, type)	EQ (DEVICE_TYPE (d), Q##type)

#ifdef ERROR_CHECK_TYPECHECK
MAC_DECLARE_EXTERN (struct device *, MTdevice_data)
# define DEVICE_TYPE_DATA(d, type)			\
MAC_BEGIN						\
  MAC_DECLARE (struct device *, MTdevice_data, d)	\
  assert (DEVICE_TYPE_P (MTdevice_data, type))		\
  MAC_SEP						\
  (struct type##_device *) MTdevice_data->device_data	\
MAC_END
#else
# define DEVICE_TYPE_DATA(d, type)			\
  ((struct type##_device *) (d)->device_data)
#endif

#define CHECK_DEVICE_TYPE(x, type)			\
  do {							\
    CHECK_DEVICE (x);					\
    if (!(DEVICEP (x) && DEVICE_TYPE_P (XDEVICE (x),	\
					 type)))	\
      dead_wrong_type_argument				\
	(type##_console_methods->predicate_symbol, x);	\
  } while (0)
#define CONCHECK_DEVICE_TYPE(x, type)			\
  do {							\
    CONCHECK_DEVICE (x);				\
    if (!(DEVICEP (x) && DEVICE_TYPE_P (XDEVICE (x),	\
					 type)))	\
      x = wrong_type_argument				\
	(type##_console_methods->predicate_symbol, x);	\
  } while (0)

/* #### These should be in the device-*.h files but there are
   too many places where the abstraction is broken.  Need to
   fix. */

#define DEVICE_X_P(dev) CONSOLE_TYPESYM_X_P (DEVICE_TYPE (dev))
#define CHECK_X_DEVICE(z) CHECK_DEVICE_TYPE (z, x)
#define CONCHECK_X_DEVICE(z) CONCHECK_DEVICE_TYPE (z, x)

#define DEVICE_NS_P(dev) CONSOLE_TYPESYM_NS_P (DEVICE_TYPE (dev))
#define CHECK_NS_DEVICE(z) CHECK_DEVICE_TYPE (z, ns)
#define CONCHECK_NS_DEVICE(z) CONCHECK_DEVICE_TYPE (z, ns)

#define DEVICE_TTY_P(dev) CONSOLE_TYPESYM_TTY_P (DEVICE_TYPE (dev))
#define CHECK_TTY_DEVICE(z) CHECK_DEVICE_TYPE (z, tty)
#define CONCHECK_TTY_DEVICE(z) CONCHECK_DEVICE_TYPE (z, tty)

#define DEVICE_STREAM_P(dev) CONSOLE_TYPESYM_STREAM_P (DEVICE_TYPE (dev))
#define CHECK_STREAM_DEVICE(z) CHECK_DEVICE_TYPE (z, stream)
#define CONCHECK_STREAM_DEVICE(z) CONCHECK_DEVICE_TYPE (z, stream)

#define DEVICE_WIN_P(dev) CONSOLE_TYPESYM_WIN_P (DEVICE_TYPE (dev))

extern Lisp_Object Vdefault_device;
extern Lisp_Object Qdelete_device;
extern Lisp_Object Qdevice_live_p;

extern Lisp_Object Vdevice_class_list;

extern Lisp_Object Qcolor, Qgrayscale, Qmono;
int valid_device_class_p (Lisp_Object class);

#define DEVICE_LIVE_P(d) (!EQ (DEVICE_TYPE (d), Qdead))

#define DEVICE_REDISPLAY_INFO(d) ((d)->redisplay_info)

#define DEVICE_NAME(d) ((d)->name)
#define DEVICE_CLASS(d) ((d)->device_class)
/* Catch people attempting to set this. */
#define DEVICE_SELECTED_FRAME(d) NON_LVALUE ((d)->_selected_frame)
#define DEVICE_FRAME_WITH_FOCUS_REAL(d) ((d)->frame_with_focus_real)
#define DEVICE_FRAME_WITH_FOCUS_FOR_HOOKS(d) ((d)->frame_with_focus_for_hooks)
#define DEVICE_FRAME_THAT_OUGHT_TO_HAVE_FOCUS(d)			\
  ((d)->frame_that_ought_to_have_focus)
#define DEVICE_USER_DEFINED_TAGS(d) ((d)->user_defined_tags)
#define DEVICE_FRAME_LIST(d) ((d)->frame_list)
#define DEVICE_CONNECTION(d) ((d)->connection)
#define DEVICE_CANON_CONNECTION(d) ((d)->canon_connection)
#define DEVICE_CONSOLE(d) ((d)->console)
#define DEVICE_BAUD_RATE(d) ((d)->baud_rate)
#define DEVICE_INFD(d) ((d)->infd)
#define DEVICE_OUTFD(d) ((d)->outfd)
#define DEVICE_OLD_SIGIO_FLAG(d) ((d)->old_sigio_flag)
#define DEVICE_OLD_FCNTL_OWNER(d) ((d)->old_fcntl_owner)
#define DEVICE_ON_CONSOLE_P(d) ((d)->on_console_p)
#define DEVICE_CONNECTED_TO_NAS_P(d) ((d)->connected_to_nas_p)

#define LOCK_DEVICE(d) do { (d)->locked = 1; } while (0)
#define UNLOCK_DEVICE(d) do { (d)->locked = 0; } while (0)

#define INVALIDATE_DEVICE_PIXEL_TO_GLYPH_CACHE(d)			\
  (d)->pixel_to_glyph_cache.valid = 0

#define INVALIDATE_PIXEL_TO_GLYPH_CACHE do {				\
  Lisp_Object _devcons_, _concons_;					\
  DEVICE_LOOP_NO_BREAK (_devcons_, _concons_)				\
    INVALIDATE_DEVICE_PIXEL_TO_GLYPH_CACHE (XDEVICE (XCONS (_devcons_)->car));\
  } while (0)

#define MARK_DEVICE_FACES_CHANGED(d) do {				\
  faces_changed = 1;							\
  (d)->faces_changed = 1; } while (0)

#define MARK_DEVICE_TOOLBARS_CHANGED(d) do {				\
  toolbar_changed = 1;							\
  (d)->toolbar_changed = 1; } while (0)

#define MARK_DEVICE_SIZE_CHANGED(d) do {				\
  size_changed = 1;							\
  (d)->size_changed = 1; } while (0)

#define MARK_DEVICE_FRAMES_FACES_CHANGED(d) do {			\
  Lisp_Object frmcons;							\
  DEVICE_FRAME_LOOP (frmcons, d)					\
    XFRAME (XCONS (frmcons)->car)->faces_changed = 1;			\
  MARK_DEVICE_FACES_CHANGED (d); } while (0)

#define MARK_DEVICE_FRAME_CHANGED(d) do {				\
  frame_changed = 1;							\
  (d)->frame_changed = 1; } while (0)

#define MARK_DEVICE_WINDOWS_CHANGED(d) do {				\
  windows_changed = 1;							\
  (d)->windows_changed = 1; } while (0)

#define MARK_DEVICE_WINDOWS_STRUCTURE_CHANGED(d) do {			\
  windows_structure_changed = 1;					\
  (d)->windows_structure_changed = 1; } while (0)

/* This turns out to be used heavily so we make it a macro to make it
   inline.  Also, the majority of the time the object will turn out to
   be a window so we move it from being checked last to being checked
   first. */
#define DFW_DEVICE(obj)					\
   (WINDOWP (obj) ? WINDOW_DEVICE (XWINDOW (obj))	\
 : (FRAMEP  (obj) ? FRAME_DEVICE (XFRAME (obj))		\
 : (DEVICEP (obj) ? obj					\
 : Qnil)))

/* NO_BREAK means that "break" doesn't do what you think it does!
   Use goto instead.  "continue" is OK, though. */
#define DEVICE_LOOP_NO_BREAK(devcons, concons)			\
  CONSOLE_LOOP (concons)					\
    CONSOLE_DEVICE_LOOP (devcons, XCONSOLE (XCAR (concons)))
#define DEVICE_FRAME_LOOP(frmcons, d) \
  LIST_LOOP (frmcons, DEVICE_FRAME_LIST (d))
#define CONSOLE_FRAME_LOOP_NO_BREAK(frmcons, devcons, con) \
  CONSOLE_DEVICE_LOOP (devcons, con) 			   \
    DEVICE_FRAME_LOOP (frmcons, XDEVICE (XCAR (devcons)))

void select_device_1 (Lisp_Object);
struct device *decode_device (Lisp_Object);
Lisp_Object make_device (struct device *d);
void handle_asynch_device_change (void);
void call_critical_lisp_code (struct device *d, Lisp_Object function,
			      Lisp_Object object);
void delete_device_internal (struct device *d, int force,
			     int called_from_delete_console,
			     int from_io_error);
void io_error_delete_device (Lisp_Object device);
Lisp_Object find_nonminibuffer_frame_not_on_device (Lisp_Object device);
void set_device_selected_frame (struct device *d, Lisp_Object frame);

#endif /* _XEMACS_DEVICE_H_ */
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