/* Input event support for Emacs on the Microsoft Windows API.
- Copyright (C) 1992-1993, 1995, 2001-2012 Free Software Foundation, Inc.
+ Copyright (C) 1992-1993, 1995, 2001-2013 Free Software Foundation,
+ Inc.
This file is part of GNU Emacs.
}
/* In a generic, multi-frame world this should take a console handle
- and return the frame for it
+ and return the frame for it.
Right now, there's only one frame so return it. */
-static FRAME_PTR
+static struct frame *
get_frame (void)
{
return SELECTED_FRAME ();
/* Mouse position hook. */
void
-w32_console_mouse_position (FRAME_PTR *f,
+w32_console_mouse_position (struct frame **f,
int insist,
Lisp_Object *bar_window,
enum scroll_bar_part *part,
if (event->dwEventFlags == MOUSE_MOVED)
{
- FRAME_PTR f = SELECTED_FRAME ();
+ struct frame *f = SELECTED_FRAME ();
Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
int mx = event->dwMousePosition.X, my = event->dwMousePosition.Y;
static void
resize_event (WINDOW_BUFFER_SIZE_RECORD *event)
{
- FRAME_PTR f = get_frame ();
+ struct frame *f = get_frame ();
change_frame_size (f, event->dwSize.Y, event->dwSize.X, 0, 1, 0);
SET_FRAME_GARBAGED (f);
maybe_generate_resize_event (void)
{
CONSOLE_SCREEN_BUFFER_INFO info;
- FRAME_PTR f = get_frame ();
+ struct frame *f = get_frame ();
GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info);
0, 0, 0);
}
-static void
+#if HAVE_W32NOTIFY
+static int
handle_file_notifications (struct input_event *hold_quit)
{
BYTE *p = file_notifications;
const DWORD min_size
= offsetof (FILE_NOTIFY_INFORMATION, FileName) + sizeof(wchar_t);
struct input_event inev;
+ int nevents = 0;
/* We cannot process notification before Emacs is fully initialized,
since we need the UTF-16LE coding-system to be set up. */
if (!initialized)
{
notification_buffer_in_use = 0;
- return;
+ return nevents;
}
enter_crit ();
if (notification_buffer_in_use)
{
DWORD info_size = notifications_size;
+ Lisp_Object cs = intern ("utf-16le");
+ Lisp_Object obj = w32_get_watch_object (notifications_desc);
/* notifications_size could be zero when the buffer of
notifications overflowed on the OS level, or when the
directory being watched was itself deleted. Do nothing in
that case. */
- if (info_size)
+ if (info_size
+ && !NILP (obj) && CONSP (obj))
{
+ Lisp_Object callback = XCDR (obj);
+
EVENT_INIT (inev);
while (info_size >= min_size)
/* Note: mule-conf is preloaded, so utf-16le must
already be defined at this point. */
Lisp_Object fname
- = code_convert_string_norecord (utf_16_fn,
- intern ("utf-16le"), 0);
+ = code_convert_string_norecord (utf_16_fn, cs, 0);
Lisp_Object action = lispy_file_action (fni->Action);
- Lisp_Object obj;
- obj = get_watch_object (make_number (notifications_desc));
- if (!NILP (obj) && CONSP (obj))
- {
- inev.kind = FILE_NOTIFY_EVENT;
- inev.code = (ptrdiff_t)notifications_desc;
- inev.timestamp = GetTickCount ();
- inev.modifiers = 0;
- inev.frame_or_window = XCDR (obj);
- inev.arg = Fcons (action, fname);
- kbd_buffer_store_event_hold (&inev, hold_quit);
- }
+ inev.kind = FILE_NOTIFY_EVENT;
+ inev.code = (ptrdiff_t)XINT (XIL ((EMACS_INT)notifications_desc));
+ inev.timestamp = GetTickCount ();
+ inev.modifiers = 0;
+ inev.frame_or_window = callback;
+ inev.arg = Fcons (action, fname);
+ kbd_buffer_store_event_hold (&inev, hold_quit);
if (!fni->NextEntryOffset)
break;
notification_buffer_in_use = 0;
}
leave_crit ();
+ return nevents;
}
+#else /* !HAVE_W32NOTIFY */
+static int
+handle_file_notifications (struct input_event *hold_quit)
+{
+ return 0;
+}
+#endif /* !HAVE_W32NOTIFY */
+
+/* Here's an overview of how Emacs input works in non-GUI sessions on
+ MS-Windows. (For description of the GUI input, see the commentary
+ before w32_msg_pump in w32fns.c.)
+
+ When Emacs is idle, it loops inside wait_reading_process_output,
+ calling pselect periodically to check whether any input is
+ available. On Windows, pselect is redirected to sys_select, which
+ uses MsgWaitForMultipleObjects to wait for input, either from the
+ keyboard or from any of the Emacs subprocesses. In addition,
+ MsgWaitForMultipleObjects wakes up when some Windows message is
+ posted to the input queue of the Emacs's main thread (which is the
+ thread in which sys_select runs).
+
+ When the Emacs's console window has focus, Windows sends input
+ events that originate from the keyboard or the mouse; these events
+ wake up MsgWaitForMultipleObjects, which reports that input is
+ available. Emacs then calls w32_console_read_socket, below, to
+ read the input. w32_console_read_socket uses
+ GetNumberOfConsoleInputEvents and ReadConsoleInput to peek at and
+ read the console input events.
+
+ One type of non-keyboard input event that gets reported as input
+ available is due to the Emacs's console window receiving focus.
+ When that happens, Emacs gets the FOCUS_EVENT event and sys_select
+ reports some input; however, w32_console_read_socket ignores such
+ events when called to read them.
+
+ Note that any other Windows message sent to the main thread will
+ also wake up MsgWaitForMultipleObjects. These messages get
+ immediately dispatched to their destinations by calling
+ drain_message_queue. */
int
w32_console_read_socket (struct terminal *terminal,
for (;;)
{
- handle_file_notifications (hold_quit);
+ int nfnotify = handle_file_notifications (hold_quit);
+
nev = fill_queue (0);
if (nev <= 0)
{
/* If nev == -1, there was some kind of error
- If nev == 0 then waitp must be zero and no events were available
+ If nev == 0 then no events were available
so return. */
+ if (nfnotify)
+ nev = 0;
break;
}
HCoop / bpt / emacs.git / blobdiff