1 files changed, 330 insertions, 159 deletions

diff --git a/src/termhooks.h b/src/termhooks.h
index 8aef23bc2a7..72e0940cea6 100644
--- a/src/termhooks.h
+++ b/src/termhooks.h
@@ -1,7 +1,6 @@
-/* Hooks by which low level terminal operations
-   can be made to call other routines.
-   Copyright (C) 1985, 1986, 1993, 1994, 2001, 2002, 2003, 2004,
-                 2005, 2006, 2007  Free Software Foundation, Inc.
+/* Parameters and display hooks for terminal devices.
+   Copyright (C) 1985, 1986, 1993, 1994, 2002, 2003, 2004,
+                 2005, 2006, 2007 Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -26,40 +25,11 @@ Boston, MA 02110-1301, USA.  */
 struct glyph;
 struct frame;
 
-/* If nonzero, send all terminal output characters to this stream also.  */
-extern FILE *termscript;
-
 /* Only use prototypes when lisp.h has been included.  */
 #ifndef P_
 #define P_(X) ()
 #endif
 
-/* Text display hooks.  */
-
-extern void (*cursor_to_hook) P_ ((int vpos, int hpos));
-extern void (*raw_cursor_to_hook) P_ ((int, int));
-
-extern void (*clear_to_end_hook) P_ ((void));
-extern void (*clear_frame_hook) P_ ((void));
-extern void (*clear_end_of_line_hook) P_ ((int));
-
-extern void (*ins_del_lines_hook) P_ ((int, int));
-
-extern void (*insert_glyphs_hook) P_ ((struct glyph *s, int n));
-extern void (*write_glyphs_hook) P_ ((struct glyph *s, int n));
-extern void (*delete_glyphs_hook) P_ ((int));
-
-extern void (*ring_bell_hook) P_ ((void));
-
-extern void (*reset_terminal_modes_hook) P_ ((void));
-extern void (*set_terminal_modes_hook) P_ ((void));
-extern void (*update_begin_hook) P_ ((struct frame *));
-extern void (*update_end_hook) P_ ((struct frame *));
-extern void (*set_terminal_window_hook) P_ ((int));
-
-
-
-/* Multi-frame and mouse support hooks.  */
 
 enum scroll_bar_part {
   scroll_bar_above_handle,
@@ -73,131 +43,12 @@ enum scroll_bar_part {
   scroll_bar_move_ratio
 };
 
-/* Return the current position of the mouse.
-
-   Set *f to the frame the mouse is in, or zero if the mouse is in no
-   Emacs frame.  If it is set to zero, all the other arguments are
-   garbage.
-
-   If the motion started in a scroll bar, set *bar_window to the
-   scroll bar's window, *part to the part the mouse is currently over,
-   *x to the position of the mouse along the scroll bar, and *y to the
-   overall length of the scroll bar.
-
-   Otherwise, set *bar_window to Qnil, and *x and *y to the column and
-   row of the character cell the mouse is over.
-
-   Set *time to the time the mouse was at the returned position.
-
-   This should clear mouse_moved until the next motion
-   event arrives.  */
-extern void (*mouse_position_hook) P_ ((struct frame **f, int,
-                                        Lisp_Object *bar_window,
-                                        enum scroll_bar_part *part,
-                                        Lisp_Object *x,
-                                        Lisp_Object *y,
-                                        unsigned long *time));
-
-/* The window system handling code should set this if the mouse has
-   moved since the last call to the mouse_position_hook.  Calling that
-   hook should clear this.  */
-extern int mouse_moved;
-
-/* When a frame's focus redirection is changed, this hook tells the
-   window system code to re-decide where to put the highlight.  Under
-   X, this means that Emacs lies about where the focus is.  */
-extern void (*frame_rehighlight_hook) P_ ((struct frame *));
-
-/* If we're displaying frames using a window system that can stack
-   frames on top of each other, this hook allows you to bring a frame
-   to the front, or bury it behind all the other windows.  If this
-   hook is zero, that means the device we're displaying on doesn't
-   support overlapping frames, so there's no need to raise or lower
-   anything.
-
-   If RAISE is non-zero, F is brought to the front, before all other
-   windows.  If RAISE is zero, F is sent to the back, behind all other
-   windows.  */
-extern void (*frame_raise_lower_hook) P_ ((struct frame *f, int raise));
-
 /* If the value of the frame parameter changed, whis hook is called.
    For example, if going from fullscreen to not fullscreen this hook
    may do something OS dependent, like extended window manager hints on X11.  */
 extern void (*fullscreen_hook) P_ ((struct frame *f));
 
 
-/* Scroll bar hooks.  */
-
-/* The representation of scroll bars is determined by the code which
-   implements them, except for one thing: they must be represented by
-   lisp objects.  This allows us to place references to them in
-   Lisp_Windows without worrying about those references becoming
-   dangling references when the scroll bar is destroyed.
-
-   The window-system-independent portion of Emacs just refers to
-   scroll bars via their windows, and never looks inside the scroll bar
-   representation; it always uses hook functions to do all the
-   scroll bar manipulation it needs.
-
-   The `vertical_scroll_bar' field of a Lisp_Window refers to that
-   window's scroll bar, or is nil if the window doesn't have a
-   scroll bar.
-
-   The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame
-   are free for use by the scroll bar implementation in any way it sees
-   fit.  They are marked by the garbage collector.  */
-
-
-/* Set the vertical scroll bar for WINDOW to have its upper left corner
-   at (TOP, LEFT), and be LENGTH rows high.  Set its handle to
-   indicate that we are displaying PORTION characters out of a total
-   of WHOLE characters, starting at POSITION.  If WINDOW doesn't yet
-   have a scroll bar, create one for it.  */
-extern void (*set_vertical_scroll_bar_hook)
-            P_ ((struct window *window,
-                 int portion, int whole, int position));
-
-
-/* The following three hooks are used when we're doing a thorough
-   redisplay of the frame.  We don't explicitly know which scroll bars
-   are going to be deleted, because keeping track of when windows go
-   away is a real pain - can you say set-window-configuration?
-   Instead, we just assert at the beginning of redisplay that *all*
-   scroll bars are to be removed, and then save scroll bars from the
-   fiery pit when we actually redisplay their window.  */
-
-/* Arrange for all scroll bars on FRAME to be removed at the next call
-   to `*judge_scroll_bars_hook'.  A scroll bar may be spared if
-   `*redeem_scroll_bar_hook' is applied to its window before the judgement.
-
-   This should be applied to each frame each time its window tree is
-   redisplayed, even if it is not displaying scroll bars at the moment;
-   if the HAS_SCROLL_BARS flag has just been turned off, only calling
-   this and the judge_scroll_bars_hook will get rid of them.
-
-   If non-zero, this hook should be safe to apply to any frame,
-   whether or not it can support scroll bars, and whether or not it is
-   currently displaying them.  */
-extern void (*condemn_scroll_bars_hook) P_ ((struct frame *frame));
-
-/* Unmark WINDOW's scroll bar for deletion in this judgement cycle.
-   Note that it's okay to redeem a scroll bar that is not condemned.  */
-extern void (*redeem_scroll_bar_hook) P_ ((struct window *window));
-
-/* Remove all scroll bars on FRAME that haven't been saved since the
-   last call to `*condemn_scroll_bars_hook'.
-
-   This should be applied to each frame after each time its window
-   tree is redisplayed, even if it is not displaying scroll bars at the
-   moment; if the HAS_SCROLL_BARS flag has just been turned off, only
-   calling this and condemn_scroll_bars_hook will get rid of them.
-
-   If non-zero, this hook should be safe to apply to any frame,
-   whether or not it can support scroll bars, and whether or not it is
-   currently displaying them.  */
-extern void (*judge_scroll_bars_hook) P_ ((struct frame *FRAME));
-
-
 /* Input queue declarations and hooks.  */
 
 /* Expedient hack: only provide the below definitions to files that
@@ -390,13 +241,6 @@ struct input_event
 
 #define EVENT_INIT(event) bzero (&(event), sizeof (struct input_event))
 
-/* Called to read input events.  */
-extern int (*read_socket_hook) P_ ((int, int, struct input_event *));
-
-/* Called when a frame's display becomes entirely up to date.  */
-extern void (*frame_up_to_date_hook) P_ ((struct frame *));
-
-
 /* Bits in the modifiers member of the input_event structure.
    Note that reorder_modifiers assumes that the bits are in canonical
    order.
@@ -446,7 +290,334 @@ enum {
   meta_modifier =  CHAR_META    /* Under X, the XK_Meta_[LR] keysyms.  */
 };
 
+#endif /* CONSP */
+
+
+/* Terminal-local parameters. */
+struct terminal
+{
+  /* Chain of all terminal devices. */
+  struct terminal *next_terminal;
+
+  /* Unique id for this terminal device. */
+  int id;
+
+  /* The number of frames that are on this terminal. */
+  int reference_count;
+
+  /* Nonzero while deleting this terminal.  Used to protect against
+     recursive calls to delete_terminal_hook.  */
+  int deleted;
+
+  /* The type of the terminal device. */
+  enum output_method type;
+
+  /* The name of the terminal device.  Do not use this to uniquely
+     identify a terminal; the same device may be opened multiple
+     times. */
+  char *name;
+
+#ifdef MULTI_KBOARD
+  /* The terminal's keyboard object. */
+  struct kboard *kboard;
+#endif
+
+  /* Device-type dependent data shared amongst all frames on this terminal. */
+  union display_info
+  {
+    struct tty_display_info *tty;     /* termchar.h */
+    struct x_display_info *x;         /* xterm.h */
+  } display_info;
+
+
+  /* Coding-system to be used for encoding terminal output.  This
+     structure contains information of a coding-system specified by
+     the function `set-terminal-coding-system'.  Also see
+     `safe_terminal_coding' in coding.h.  */
+  struct coding_system *terminal_coding;
+
+  /* Coding-system of what is sent from terminal keyboard.  This
+     structure contains information of a coding-system specified by
+     the function `set-keyboard-coding-system'.  */
+  struct coding_system *keyboard_coding;
+
+  /* Parameter alist of this terminal.  */
+  Lisp_Object param_alist;
+  
+  /* Terminal characteristics. */
+  /* XXX Are these really used on non-termcap displays? */
+  
+  int must_write_spaces;        /* Nonzero means spaces in the text must
+                                   actually be output; can't just skip over
+                                   some columns to leave them blank.  */
+  int fast_clear_end_of_line;   /* Nonzero means terminal has a `ce' string */
+  
+  int line_ins_del_ok;          /* Terminal can insert and delete lines */
+  int char_ins_del_ok;          /* Terminal can insert and delete chars */
+  int scroll_region_ok;         /* Terminal supports setting the scroll
+                                   window */
+  int scroll_region_cost;       /* Cost of setting the scroll window,
+                                   measured in characters. */
+  int memory_below_frame;       /* Terminal remembers lines scrolled
+                                   off bottom */
+
+#if 0  /* These are not used anywhere. */
+  /* EMACS_INT baud_rate; */    /* Output speed in baud */
+  int min_padding_speed;        /* Speed below which no padding necessary. */
+  int dont_calculate_costs;     /* Nonzero means don't bother computing
+                                   various cost tables; we won't use them. */
+#endif
+
+
+  /* Window-based redisplay interface for this device (0 for tty
+     devices). */
+  struct redisplay_interface *rif;
+
+  /* Frame-based redisplay interface. */
+  
+  /* Text display hooks.  */
+
+  void (*cursor_to_hook) P_ ((struct frame *f, int vpos, int hpos));
+  void (*raw_cursor_to_hook) P_ ((struct frame *, int, int));
+  
+  void (*clear_to_end_hook) P_ ((struct frame *));
+  void (*clear_frame_hook) P_ ((struct frame *));
+  void (*clear_end_of_line_hook) P_ ((struct frame *, int));
+  
+  void (*ins_del_lines_hook) P_ ((struct frame *f, int, int));
+  
+  void (*insert_glyphs_hook) P_ ((struct frame *f, struct glyph *s, int n));
+  void (*write_glyphs_hook) P_ ((struct frame *f, struct glyph *s, int n));
+  void (*delete_glyphs_hook) P_ ((struct frame *, int));
+  
+  void (*ring_bell_hook) P_ ((struct frame *f));
+  
+  void (*reset_terminal_modes_hook) P_ ((struct terminal *));
+  void (*set_terminal_modes_hook) P_ ((struct terminal *));
+
+  void (*update_begin_hook) P_ ((struct frame *));
+  void (*update_end_hook) P_ ((struct frame *));
+  void (*set_terminal_window_hook) P_ ((struct frame *, int));
+
+  /* Multi-frame and mouse support hooks.  */
+
+  /* Return the current position of the mouse.
+
+     Set *f to the frame the mouse is in, or zero if the mouse is in no
+     Emacs frame.  If it is set to zero, all the other arguments are
+     garbage.
+  
+     If the motion started in a scroll bar, set *bar_window to the
+     scroll bar's window, *part to the part the mouse is currently over,
+     *x to the position of the mouse along the scroll bar, and *y to the
+     overall length of the scroll bar.
+
+     Otherwise, set *bar_window to Qnil, and *x and *y to the column and
+     row of the character cell the mouse is over.
+
+     Set *time to the time the mouse was at the returned position.
+     
+     This should clear mouse_moved until the next motion
+     event arrives.  */
+  void (*mouse_position_hook) P_ ((struct frame **f, int,
+                                   Lisp_Object *bar_window,
+                                   enum scroll_bar_part *part,
+                                   Lisp_Object *x,
+                                   Lisp_Object *y,
+                                   unsigned long *time));
+
+  /* The window system handling code should set this if the mouse has
+     moved since the last call to the mouse_position_hook.  Calling that
+     hook should clear this.  */
+  int mouse_moved;
+
+  /* When a frame's focus redirection is changed, this hook tells the
+     window system code to re-decide where to put the highlight.  Under
+     X, this means that Emacs lies about where the focus is.  */
+  void (*frame_rehighlight_hook) P_ ((struct frame *));
+
+  /* If we're displaying frames using a window system that can stack
+     frames on top of each other, this hook allows you to bring a frame
+     to the front, or bury it behind all the other windows.  If this
+     hook is zero, that means the terminal we're displaying on doesn't
+     support overlapping frames, so there's no need to raise or lower
+     anything.
+     
+     If RAISE is non-zero, F is brought to the front, before all other
+     windows.  If RAISE is zero, F is sent to the back, behind all other
+     windows.  */
+  void (*frame_raise_lower_hook) P_ ((struct frame *f, int raise));
+
+  /* If the value of the frame parameter changed, whis hook is called.
+     For example, if going from fullscreen to not fullscreen this hook
+     may do something OS dependent, like extended window manager hints on X11.  */
+  void (*fullscreen_hook) P_ ((struct frame *f));
+    
+  
+  /* Scroll bar hooks.  */
+
+  /* The representation of scroll bars is determined by the code which
+     implements them, except for one thing: they must be represented by
+     lisp objects.  This allows us to place references to them in
+     Lisp_Windows without worrying about those references becoming
+     dangling references when the scroll bar is destroyed.
+     
+     The window-system-independent portion of Emacs just refers to
+     scroll bars via their windows, and never looks inside the scroll bar
+     representation; it always uses hook functions to do all the
+     scroll bar manipulation it needs.
+     
+     The `vertical_scroll_bar' field of a Lisp_Window refers to that
+     window's scroll bar, or is nil if the window doesn't have a
+     scroll bar.
+     
+     The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame
+     are free for use by the scroll bar implementation in any way it sees
+     fit.  They are marked by the garbage collector.  */
+  
+  
+  /* Set the vertical scroll bar for WINDOW to have its upper left corner
+     at (TOP, LEFT), and be LENGTH rows high.  Set its handle to
+     indicate that we are displaying PORTION characters out of a total
+     of WHOLE characters, starting at POSITION.  If WINDOW doesn't yet
+     have a scroll bar, create one for it.  */
+  void (*set_vertical_scroll_bar_hook) P_ ((struct window *window,
+                                            int portion, int whole,
+                                            int position));
+
+
+  /* The following three hooks are used when we're doing a thorough
+     redisplay of the frame.  We don't explicitly know which scroll bars
+     are going to be deleted, because keeping track of when windows go
+     away is a real pain - can you say set-window-configuration?
+     Instead, we just assert at the beginning of redisplay that *all*
+     scroll bars are to be removed, and then save scroll bars from the
+     fiery pit when we actually redisplay their window.  */
+  
+  /* Arrange for all scroll bars on FRAME to be removed at the next call
+     to `*judge_scroll_bars_hook'.  A scroll bar may be spared if
+     `*redeem_scroll_bar_hook' is applied to its window before the judgement.
+     
+     This should be applied to each frame each time its window tree is
+     redisplayed, even if it is not displaying scroll bars at the moment;
+     if the HAS_SCROLL_BARS flag has just been turned off, only calling
+     this and the judge_scroll_bars_hook will get rid of them.
+     
+     If non-zero, this hook should be safe to apply to any frame,
+     whether or not it can support scroll bars, and whether or not it is
+     currently displaying them.  */
+  void (*condemn_scroll_bars_hook) P_ ((struct frame *frame));
+
+  /* Unmark WINDOW's scroll bar for deletion in this judgement cycle.
+     Note that it's okay to redeem a scroll bar that is not condemned.  */
+  void (*redeem_scroll_bar_hook) P_ ((struct window *window));
+
+  /* Remove all scroll bars on FRAME that haven't been saved since the
+     last call to `*condemn_scroll_bars_hook'.
+
+     This should be applied to each frame after each time its window
+     tree is redisplayed, even if it is not displaying scroll bars at the
+     moment; if the HAS_SCROLL_BARS flag has just been turned off, only
+     calling this and condemn_scroll_bars_hook will get rid of them.
+     
+     If non-zero, this hook should be safe to apply to any frame,
+     whether or not it can support scroll bars, and whether or not it is
+     currently displaying them.  */
+  void (*judge_scroll_bars_hook) P_ ((struct frame *FRAME));
+
+
+  /* Called to read input events.
+
+     TERMINAL indicates which terminal device to read from.  Input
+     events should be read into BUF, the size of which is given in
+     SIZE.  EXPECTED is non-zero if the caller suspects that new input
+     is available.
+
+     A positive return value indicates that that many input events
+     where read into BUF.
+     Zero means no events were immediately available.
+     A value of -1 means a transient read error, while -2 indicates
+     that the device was closed (hangup), and it should be deleted.
+
+     XXX Please note that a non-zero value of EXPECTED only means that
+     there is available input on at least one of the currently opened
+     terminal devices -- but not necessarily on this device.
+     Therefore, in most cases EXPECTED should be simply ignored.
+
+     XXX This documentation needs to be updated.  */
+  int (*read_socket_hook) P_ ((struct terminal *terminal,
+                               int expected,
+                               struct input_event *hold_quit));
+
+  /* Called when a frame's display becomes entirely up to date.  */
+  void (*frame_up_to_date_hook) P_ ((struct frame *));
+
+
+  /* Called to delete the device-specific portions of a frame that is
+     on this terminal device. */
+  void (*delete_frame_hook) P_ ((struct frame *));
+
+  /* Called after the last frame on this terminal is deleted, or when
+     the display device was closed (hangup).
+     
+     If this is NULL, then the generic delete_terminal is called
+     instead.  Otherwise the hook must call delete_terminal itself.
+
+     The hook must check for and close any live frames that are still
+     on the terminal.  Fdelete_frame ensures that there are no live
+     frames on the terminal when it calls this hook, so infinite
+     recursion is prevented.  */
+  void (*delete_terminal_hook) P_ ((struct terminal *));
+};
+
+
+/* Chain of all terminal devices currently in use. */
+extern struct terminal *terminal_list;
+
+#define FRAME_MUST_WRITE_SPACES(f) ((f)->terminal->must_write_spaces)
+#define FRAME_FAST_CLEAR_END_OF_LINE(f) ((f)->terminal->fast_clear_end_of_line)
+#define FRAME_LINE_INS_DEL_OK(f) ((f)->terminal->line_ins_del_ok)
+#define FRAME_CHAR_INS_DEL_OK(f) ((f)->terminal->char_ins_del_ok)
+#define FRAME_SCROLL_REGION_OK(f) ((f)->terminal->scroll_region_ok)
+#define FRAME_SCROLL_REGION_COST(f) ((f)->terminal->scroll_region_cost)
+#define FRAME_MEMORY_BELOW_FRAME(f) ((f)->terminal->memory_below_frame)
+
+#define FRAME_TERMINAL_CODING(f) ((f)->terminal->terminal_coding)
+#define FRAME_KEYBOARD_CODING(f) ((f)->terminal->keyboard_coding)
+
+#define TERMINAL_TERMINAL_CODING(d) ((d)->terminal_coding)
+#define TERMINAL_KEYBOARD_CODING(d) ((d)->keyboard_coding)
+
+#define FRAME_RIF(f) ((f)->terminal->rif)
+
+#define FRAME_TERMINAL(f) ((f)->terminal)
+
+/* FRAME_WINDOW_P tests whether the frame is a window, and is
+   defined to be the predicate for the window system being used.  */
+
+#ifdef HAVE_X_WINDOWS
+#define FRAME_WINDOW_P(f) FRAME_X_P (f)
 #endif
+#ifdef HAVE_NTGUI
+#define FRAME_WINDOW_P(f) FRAME_W32_P (f)
+#endif
+#ifdef MAC_OS
+#define FRAME_WINDOW_P(f) FRAME_MAC_P (f)
+#endif
+#ifndef FRAME_WINDOW_P
+#define FRAME_WINDOW_P(f) (0)
+#endif
+
+/* Return true if the terminal device is not suspended. */
+#define TERMINAL_ACTIVE_P(d) ((d)->type != output_termcap || (d)->display_info.tty->input)
+
+extern Lisp_Object get_terminal_param P_ ((struct terminal *, Lisp_Object));
+extern struct terminal *get_terminal P_ ((Lisp_Object terminal, int));
+extern struct terminal *create_terminal P_ ((void));
+extern void delete_terminal P_ ((struct terminal *));
+
+/* The initial terminal device, created by initial_term_init. */
+extern struct terminal *initial_terminal;
 
 /* arch-tag: 33a00ecc-52b5-4186-a410-8801ac9f087d
    (do not change this comment) */