/* Keyboard and mouse input; editor command loop.
- Copyright (C) 1985,86,87,88,89,93,94,95,96,97,99,2000,01,02,03
+ Copyright (C) 1985,86,87,88,89,93,94,95,96,97,99,2000,01,02,03,04
Free Software Foundation, Inc.
This file is part of GNU Emacs.
static struct input_event kbd_buffer[KBD_BUFFER_SIZE];
-/* Vector to GCPRO the Lisp objects referenced from kbd_buffer.
-
- The interrupt-level event handlers will never enqueue an event on a
- frame which is not in Vframe_list, and once an event is dequeued,
- internal_last_event_frame or the event itself points to the frame.
- So that's all fine.
-
- But while the event is sitting in the queue, it's completely
- unprotected. Suppose the user types one command which will run for
- a while and then delete a frame, and then types another event at
- the frame that will be deleted, before the command gets around to
- it. Suppose there are no references to this frame elsewhere in
- Emacs, and a GC occurs before the second event is dequeued. Now we
- have an event referring to a freed frame, which will crash Emacs
- when it is dequeued.
-
- Similar things happen when an event on a scroll bar is enqueued; the
- window may be deleted while the event is in the queue.
-
- So, we use this vector to protect the Lisp_Objects in the event
- queue. That way, they'll be dequeued as dead frames or windows,
- but still valid Lisp objects.
-
- If kbd_buffer[i].kind != NO_EVENT, then
-
- AREF (kbd_buffer_gcpro, 2 * i) == kbd_buffer[i].frame_or_window.
- AREF (kbd_buffer_gcpro, 2 * i + 1) == kbd_buffer[i].arg. */
-
-static Lisp_Object kbd_buffer_gcpro;
-
/* Pointer to next available character in kbd_buffer.
If kbd_fetch_ptr == kbd_store_ptr, the buffer is empty.
This may be kbd_buffer + KBD_BUFFER_SIZE, meaning that the
Lisp_Object Qmenu_bar;
extern Lisp_Object Qleft_margin, Qright_margin;
extern Lisp_Object Qleft_fringe, Qright_fringe;
-extern Lisp_Object Qimage;
+extern Lisp_Object QCmap;
Lisp_Object recursive_edit_unwind (), command_loop ();
Lisp_Object Fthis_command_keys ();
: (PT < last_pt ? beg : end));
check_composition = check_display = 1;
}
+#if 0 /* This assertion isn't correct, because SET_PT may end up setting
+ the point to something other than its argument, due to
+ point-motion hooks, intangibility, etc. */
xassert (PT == beg || PT == end);
+#endif
+
/* Pretend the area doesn't exist if the buffer is not
modified. */
if (!modified && !ellipsis && beg < end)
{
Lisp_Object posn;
- posn = POSN_BUFFER_POSN (EVENT_START (c));
+ posn = POSN_POSN (EVENT_START (c));
/* Handle menu-bar events:
insert the dummy prefix event `menu-bar'. */
if (EQ (posn, Qmenu_bar) || EQ (posn, Qtool_bar))
{
/* Change menu-bar to (menu-bar) as the event "position". */
- POSN_BUFFER_SET_POSN (EVENT_START (c), Fcons (posn, Qnil));
+ POSN_SET_POSN (EVENT_START (c), Fcons (posn, Qnil));
also_record = c;
Vunread_command_events = Fcons (c, Vunread_command_events);
void
kbd_buffer_store_event (event)
register struct input_event *event;
+{
+ kbd_buffer_store_event_hold (event, 0);
+}
+
+/* Store EVENT obtained at interrupt level into kbd_buffer, fifo.
+
+ If HOLD_QUIT is 0, just stuff EVENT into the fifo.
+ Else, if HOLD_QUIT.kind != NO_EVENT, discard EVENT.
+ Else, if EVENT is a quit event, store the quit event
+ in HOLD_QUIT, and return (thus ignoring further events).
+
+ This is used in read_avail_input to postpone the processing
+ of the quit event until all subsequent input events have been
+ parsed (and discarded).
+ */
+
+void
+kbd_buffer_store_event_hold (event, hold_quit)
+ register struct input_event *event;
+ struct input_event *hold_quit;
{
if (event->kind == NO_EVENT)
abort ();
+ if (hold_quit && hold_quit->kind != NO_EVENT)
+ return;
+
if (event->kind == ASCII_KEYSTROKE_EVENT)
{
register int c = event->code & 0377;
}
#endif
+ if (hold_quit)
+ {
+ bcopy (event, (char *) hold_quit, sizeof (*event));
+ return;
+ }
+
/* If this results in a quit_char being returned to Emacs as
input, set Vlast_event_frame properly. If this doesn't
get returned to Emacs as an event, the next event read
Just ignore the second one. */
else if (event->kind == BUFFER_SWITCH_EVENT
&& kbd_fetch_ptr != kbd_store_ptr
- && kbd_store_ptr->kind == BUFFER_SWITCH_EVENT)
+ && ((kbd_store_ptr == kbd_buffer
+ ? kbd_buffer + KBD_BUFFER_SIZE - 1
+ : kbd_store_ptr - 1)->kind) == BUFFER_SWITCH_EVENT)
return;
if (kbd_store_ptr - kbd_buffer == KBD_BUFFER_SIZE)
Discard the event if it would fill the last slot. */
if (kbd_fetch_ptr - 1 != kbd_store_ptr)
{
- int idx;
#if 0 /* The SELECTION_REQUEST_EVENT case looks bogus, and it's error
prone to assign individual members for other events, in case
*kbd_store_ptr = *event;
#endif
- idx = 2 * (kbd_store_ptr - kbd_buffer);
- ASET (kbd_buffer_gcpro, idx, event->frame_or_window);
- ASET (kbd_buffer_gcpro, idx + 1, event->arg);
++kbd_store_ptr;
}
}
Value is the number of input_events generated. */
-int
-gen_help_event (bufp, size, help, frame, window, object, pos)
- struct input_event *bufp;
- int size;
+void
+gen_help_event (help, frame, window, object, pos)
Lisp_Object help, frame, object, window;
int pos;
{
- if (size >= 1)
- {
- bufp->kind = HELP_EVENT;
- bufp->frame_or_window = frame;
- bufp->arg = object;
- bufp->x = WINDOWP (window) ? window : frame;
- bufp->y = help;
- bufp->code = pos;
- return 1;
- }
- return 0;
+ struct input_event event;
+
+ EVENT_INIT (event);
+
+ event.kind = HELP_EVENT;
+ event.frame_or_window = frame;
+ event.arg = object;
+ event.x = WINDOWP (window) ? window : frame;
+ event.y = help;
+ event.code = pos;
+ kbd_buffer_store_event (&event);
}
clear_event (event)
struct input_event *event;
{
- int idx = 2 * (event - kbd_buffer);
- ASET (kbd_buffer_gcpro, idx, Qnil);
- ASET (kbd_buffer_gcpro, idx + 1, Qnil);
event->kind = NO_EVENT;
}
{
/* It's a click in window window at frame coordinates (x,y) */
struct window *w = XWINDOW (window);
- Lisp_Object object = Qnil;
+ Lisp_Object string_info = Qnil;
int textpos = -1, rx = -1, ry = -1;
int dx = -1, dy = -1;
+ int width = -1, height = -1;
+ Lisp_Object object = Qnil;
/* Set event coordinates to window-relative coordinates
for constructing the Lisp event below. */
posn = part == ON_MODE_LINE ? Qmode_line : Qheader_line;
rx = wx, ry = wy;
- string = mode_line_string (w, &rx, &ry, &dx, &dy, part, &charpos);
+ string = mode_line_string (w, part, &rx, &ry, &charpos,
+ &object, &dx, &dy, &width, &height);
if (STRINGP (string))
- object = Fcons (string, make_number (charpos));
+ string_info = Fcons (string, make_number (charpos));
if (w == XWINDOW (selected_window))
textpos = PT;
else
posn = Qvertical_line;
wx = -1;
dx = 0;
+ width = 1;
}
else if (part == ON_LEFT_MARGIN || part == ON_RIGHT_MARGIN)
{
Lisp_Object string;
int charpos;
-
+
posn = (part == ON_LEFT_MARGIN) ? Qleft_margin : Qright_margin;
rx = wx, ry = wy;
- string = marginal_area_string (w, &rx, &ry, &dx, &dy, part, &charpos);
+ string = marginal_area_string (w, part, &rx, &ry, &charpos,
+ &object, &dx, &dy, &width, &height);
if (STRINGP (string))
- object = Fcons (string, make_number (charpos));
+ string_info = Fcons (string, make_number (charpos));
}
else if (part == ON_LEFT_FRINGE || part == ON_RIGHT_FRINGE)
{
if (textpos < 0)
{
- Lisp_Object string;
+ Lisp_Object string2, object2 = Qnil;
struct display_pos p;
int dx2, dy2;
+ int width2, height2;
wx = max (WINDOW_LEFT_MARGIN_WIDTH (w), wx);
- buffer_posn_from_coords (w, &wx, &wy, &dx2, &dy2, &string, &p);
+ string2 = buffer_posn_from_coords (w, &wx, &wy, &p,
+ &object2, &dx2, &dy2,
+ &width2, &height2);
textpos = CHARPOS (p.pos);
if (rx < 0) rx = wx;
if (ry < 0) ry = wy;
if (dx < 0) dx = dx2;
if (dy < 0) dy = dy2;
+ if (width < 0) width = width2;
+ if (height < 0) height = height2;
if (NILP (posn))
{
posn = make_number (textpos);
- if (STRINGP (string))
- object = Fcons (string,
- make_number (CHARPOS (p.string_pos)));
- else if (CONSP (string) && EQ (XCAR (string), Qimage))
- object = string;
+ if (STRINGP (string2))
+ string_info = Fcons (string2,
+ make_number (CHARPOS (p.string_pos)));
}
+ if (NILP (object))
+ object = object2;
+ }
+
+#ifdef HAVE_WINDOW_SYSTEM
+ if (IMAGEP (object))
+ {
+ Lisp_Object image_map, hotspot;
+ if ((image_map = Fplist_get (XCDR (object), QCmap),
+ !NILP (image_map))
+ && (hotspot = find_hot_spot (image_map, dx, dy),
+ CONSP (hotspot))
+ && (hotspot = XCDR (hotspot), CONSP (hotspot)))
+ posn = XCAR (hotspot);
}
+#endif
+ /* Object info */
extra_info = Fcons (object,
+ Fcons (Fcons (make_number (dx),
+ make_number (dy)),
+ Fcons (Fcons (make_number (width),
+ make_number (height)),
+ Qnil)));
+
+ /* String info */
+ extra_info = Fcons (string_info,
Fcons (make_number (textpos),
Fcons (Fcons (make_number (rx),
make_number (ry)),
- Fcons (Fcons (make_number (dx),
- make_number (dy)),
- Qnil))));
+ extra_info)));
}
else if (f != 0)
{
{
Lisp_Object position;
Lisp_Object head;
-
+
/* Build the position as appropriate for this mouse click. */
struct frame *f = XFRAME (event->frame_or_window);
read_avail_input (expected)
int expected;
{
- struct input_event buf[KBD_BUFFER_SIZE];
register int i;
- int nread;
-
- for (i = 0; i < KBD_BUFFER_SIZE; i++)
- EVENT_INIT (buf[i]);
+ int nread = 0;
if (read_socket_hook)
- /* No need for FIONREAD or fcntl; just say don't wait. */
- nread = (*read_socket_hook) (input_fd, buf, KBD_BUFFER_SIZE, expected);
+ {
+ int discard = 0;
+ int nr;
+ struct input_event hold_quit;
+
+ EVENT_INIT (hold_quit);
+ hold_quit.kind = NO_EVENT;
+
+ /* No need for FIONREAD or fcntl; just say don't wait. */
+ while (nr = (*read_socket_hook) (input_fd, expected, &hold_quit), nr > 0)
+ {
+ nread += nr;
+ expected = 0;
+ }
+ if (hold_quit.kind != NO_EVENT)
+ kbd_buffer_store_event (&hold_quit);
+ }
else
{
/* Using KBD_BUFFER_SIZE - 1 here avoids reading more than
#endif /* no FIONREAD */
for (i = 0; i < nread; i++)
{
- buf[i].kind = ASCII_KEYSTROKE_EVENT;
- buf[i].modifiers = 0;
+ struct input_event buf;
+ EVENT_INIT (buf);
+ buf.kind = ASCII_KEYSTROKE_EVENT;
+ buf.modifiers = 0;
if (meta_key == 1 && (cbuf[i] & 0x80))
- buf[i].modifiers = meta_modifier;
+ buf.modifiers = meta_modifier;
if (meta_key != 2)
cbuf[i] &= ~0x80;
- buf[i].code = cbuf[i];
- buf[i].frame_or_window = selected_frame;
- buf[i].arg = Qnil;
- }
- }
+ buf.code = cbuf[i];
+ buf.frame_or_window = selected_frame;
+ buf.arg = Qnil;
- /* Scan the chars for C-g and store them in kbd_buffer. */
- for (i = 0; i < nread; i++)
- {
- kbd_buffer_store_event (&buf[i]);
- /* Don't look at input that follows a C-g too closely.
- This reduces lossage due to autorepeat on C-g. */
- if (buf[i].kind == ASCII_KEYSTROKE_EVENT
- && buf[i].code == quit_char)
- break;
+ kbd_buffer_store_event (&buf);
+ /* Don't look at input that follows a C-g too closely.
+ This reduces lossage due to autorepeat on C-g. */
+ if (buf.kind == ASCII_KEYSTROKE_EVENT
+ && buf.code == quit_char)
+ break;
+ }
}
return nread;
}
#endif /* not VMS */
\f
+void
+handle_async_input ()
+{
+#ifdef BSD4_1
+ extern int select_alarmed;
+#endif
+ interrupt_input_pending = 0;
+
+ while (1)
+ {
+ int nread;
+ nread = read_avail_input (1);
+ /* -1 means it's not ok to read the input now.
+ UNBLOCK_INPUT will read it later; now, avoid infinite loop.
+ 0 means there was no keyboard input available. */
+ if (nread <= 0)
+ break;
+
+#ifdef BSD4_1
+ select_alarmed = 1; /* Force the select emulator back to life */
+#endif
+ }
+}
+
#ifdef SIGIO /* for entire page */
/* Note SIGIO has been undef'd if FIONREAD is missing. */
{
/* Must preserve main program's value of errno. */
int old_errno = errno;
-#ifdef BSD4_1
- extern int select_alarmed;
-#endif
#if defined (USG) && !defined (POSIX_SIGNALS)
/* USG systems forget handlers when they are used;
if (input_available_clear_time)
EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
- while (1)
- {
- int nread;
- nread = read_avail_input (1);
- /* -1 means it's not ok to read the input now.
- UNBLOCK_INPUT will read it later; now, avoid infinite loop.
- 0 means there was no keyboard input available. */
- if (nread <= 0)
- break;
-
-#ifdef BSD4_1
- select_alarmed = 1; /* Force the select emulator back to life */
+#ifdef SYNC_INPUT
+ interrupt_input_pending = 1;
+#else
+ handle_async_input ();
#endif
- }
#ifdef BSD4_1
sigfree ();
reinvoke_input_signal ()
{
#ifdef SIGIO
- kill (getpid (), SIGIO);
+ handle_async_input ();
#endif
}
newcache = chkcache;
if (chkcache)
{
- tem = Fkey_description (tem);
+ tem = Fkey_description (tem, Qnil);
if (CONSP (prefix))
{
if (STRINGP (XCAR (prefix)))
int do_funcall;
{
Lisp_Object next;
-
+
next = access_keymap (map, key, 1, 0, 1);
/* Handle symbol with autoload definition. */
&& (!NILP (Farrayp (XSYMBOL (next)->function))
|| KEYMAPP (XSYMBOL (next)->function)))
next = XSYMBOL (next)->function;
-
+
/* If the keymap gives a function, not an
array, then call the function with one arg and use
its value instead. */
Lisp_Object window, posn;
window = POSN_WINDOW (EVENT_START (key));
- posn = POSN_BUFFER_POSN (EVENT_START (key));
+ posn = POSN_POSN (EVENT_START (key));
if (CONSP (posn)
|| (!NILP (fake_prefixed_keys)
localized_local_map = 1;
start = EVENT_START (key);
- if (CONSP (start) && CONSP (XCDR (start)))
+ if (CONSP (start) && POSN_INBUFFER_P (start))
{
pos = POSN_BUFFER_POSN (start);
if (INTEGERP (pos)
{
Lisp_Object posn;
- posn = POSN_BUFFER_POSN (EVENT_START (key));
+ posn = POSN_POSN (EVENT_START (key));
/* Handle menu-bar events:
insert the dummy prefix event `menu-bar'. */
if (EQ (posn, Qmenu_bar) || EQ (posn, Qtool_bar))
/* Zap the position in key, so we know that we've
expanded it, and don't try to do so again. */
- POSN_BUFFER_SET_POSN (EVENT_START (key),
- Fcons (posn, Qnil));
+ POSN_SET_POSN (EVENT_START (key),
+ Fcons (posn, Qnil));
mock_input = t + 2;
goto replay_sequence;
/* Adjust the function-key-map counters. */
fkey.end += diff;
fkey.start += diff;
-
+
goto replay_sequence;
}
}
int count = SPECPDL_INDEX ();
record_unwind_protect (pop_message_unwind, Qnil);
- binding = Fkey_description (bindings);
+ binding = Fkey_description (bindings, Qnil);
newmessage
= (char *) alloca (SCHARS (SYMBOL_NAME (function))
discard_tty_input ();
kbd_fetch_ptr = kbd_store_ptr;
- Ffillarray (kbd_buffer_gcpro, Qnil);
input_pending = 0;
return Qnil;
Should we ignore anything that was typed in at the "wrong" kboard? */
for (; kbd_fetch_ptr != kbd_store_ptr; kbd_fetch_ptr++)
{
- int idx;
if (kbd_fetch_ptr == kbd_buffer + KBD_BUFFER_SIZE)
kbd_fetch_ptr = kbd_buffer;
if (kbd_fetch_ptr->kind == ASCII_KEYSTROKE_EVENT)
stuff_char (kbd_fetch_ptr->code);
- kbd_fetch_ptr->kind = NO_EVENT;
- idx = 2 * (kbd_fetch_ptr - kbd_buffer);
- ASET (kbd_buffer_gcpro, idx, Qnil);
- ASET (kbd_buffer_gcpro, idx + 1, Qnil);
+ clear_event (kbd_fetch_ptr);
}
input_pending = 0;
return Flist (sizeof (val) / sizeof (val[0]), val);
}
+DEFUN ("posn-at-x-y", Fposn_at_x_y, Sposn_at_x_y, 2, 3, 0,
+ doc: /* Return position information for pixel coordinates X and Y.
+By default, X and Y are relative to text area of the selected window.
+Optional third arg FRAME_OR_WINDOW non-nil specifies frame or window.
+
+The return value is similar to a mouse click position:
+ (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW)
+ IMAGE (DX . DY) (WIDTH . HEIGHT))
+The `posn-' functions access elements of such lists. */)
+ (x, y, frame_or_window)
+ Lisp_Object x, y, frame_or_window;
+{
+ if (NILP (frame_or_window))
+ frame_or_window = selected_window;
+
+ if (WINDOWP (frame_or_window))
+ {
+ struct window *w;
+
+ CHECK_LIVE_WINDOW (frame_or_window);
+
+ w = XWINDOW (frame_or_window);
+ XSETINT (x, (WINDOW_TO_FRAME_PIXEL_X (w, XINT (x))
+ + window_box_left_offset (w, TEXT_AREA)));
+ XSETINT (y, WINDOW_TO_FRAME_PIXEL_Y (w, XINT (y)));
+ frame_or_window = w->frame;
+ }
+
+ CHECK_LIVE_FRAME (frame_or_window);
+
+ return make_lispy_position (XFRAME (frame_or_window), &x, &y, 0);
+}
+
+DEFUN ("posn-at-point", Fposn_at_point, Sposn_at_point, 0, 2, 0,
+ doc: /* Return position information for buffer POS in WINDOW.
+POS defaults to point in WINDOW; WINDOW defaults to the selected window.
+
+Return nil if position is not visible in window. Otherwise,
+the return value is similar to that returned by event-start for
+a mouse click at the upper left corner of the glyph corresponding
+to the given buffer position:
+ (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW)
+ IMAGE (DX . DY) (WIDTH . HEIGHT))
+The `posn-' functions access elements of such lists. */*/)
+ (pos, window)
+ Lisp_Object pos, window;
+{
+ Lisp_Object tem;
+
+ tem = Fpos_visible_in_window_p (pos, window, Qt);
+ if (!NILP (tem))
+ tem = Fposn_at_x_y (XCAR (tem), XCAR (XCDR (tem)), window);
+ return tem;
+}
+
\f
/*
* Set up a new kboard object with reasonable initial values.
recent_keys_index = 0;
kbd_fetch_ptr = kbd_buffer;
kbd_store_ptr = kbd_buffer;
- kbd_buffer_gcpro = Fmake_vector (make_number (2 * KBD_BUFFER_SIZE), Qnil);
#ifdef HAVE_MOUSE
do_mouse_tracking = Qnil;
#endif
Fset (Qextended_command_history, Qnil);
staticpro (&Qextended_command_history);
- kbd_buffer_gcpro = Fmake_vector (make_number (2 * KBD_BUFFER_SIZE), Qnil);
- staticpro (&kbd_buffer_gcpro);
-
accent_key_syms = Qnil;
staticpro (&accent_key_syms);
defsubr (&Sset_input_mode);
defsubr (&Scurrent_input_mode);
defsubr (&Sexecute_extended_command);
+ defsubr (&Sposn_at_point);
+ defsubr (&Sposn_at_x_y);
DEFVAR_LISP ("last-command-char", &last_command_char,
doc: /* Last input event that was part of a command. */);
/* Handling it at such a low-level causes read_key_sequence to get
* confused because it doesn't realize that the current_buffer was
* changed by read_char.
- *
+ *
* initial_define_lispy_key (Vspecial_event_map, "select-window",
* "handle-select-window"); */
initial_define_lispy_key (Vspecial_event_map, "save-session",