-/* William Perry 1997 */
+/* GPM functions
+ Copyright (C) 1997 William M. Perry <wmperry@gnu.org>
+ Copyright (C) 1999 Free Software Foundation, Inc.
+
+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. */
+
+/* Authors: William Perry */
#include <config.h>
#include "lisp.h"
#include "events.h"
#include "events-mod.h"
#include "sysdep.h"
+#include "commands.h"
+#include "lstream.h"
+#include "sysproc.h" /* for MAXDESC */
+#include "process.h"
#ifdef HAVE_GPM
#include "gpmevent.h"
#include <linux/keyboard.h>
#endif
-int
-handle_gpm_read (struct Lisp_Event *event, struct console *con, int fd)
-{
- Gpm_Event ev;
- int modifiers = 0;
- int type = -1;
- int button = 1;
-
- if (!Gpm_GetEvent(&ev))
- return 0;
-
- event->timestamp = 0;
- event->channel = CONSOLE_SELECTED_FRAME (con);
-
- /* Whow, wouldn't named defines be NICE!?!?! */
- modifiers = 0;
-
- if (ev.modifiers & 1) modifiers |= MOD_SHIFT;
- if (ev.modifiers & 2) modifiers |= MOD_META;
- if (ev.modifiers & 4) modifiers |= MOD_CONTROL;
- if (ev.modifiers & 8) modifiers |= MOD_META;
-
- if (ev.type & GPM_DOWN)
- type = GPM_DOWN;
- else if (ev.type & GPM_UP)
- type = GPM_UP;
- else if (ev.type & GPM_MOVE) {
- type = GPM_MOVE;
- GPM_DRAWPOINTER(&ev);
- }
-
- if (ev.buttons & GPM_B_LEFT)
- button = 1;
- else if (ev.buttons & GPM_B_MIDDLE)
- button = 2;
- else if (ev.buttons & GPM_B_RIGHT)
- button = 3;
-
- switch (type) {
- case GPM_DOWN:
- case GPM_UP:
- event->event_type =
- type == GPM_DOWN ? button_press_event : button_release_event;
- event->event.button.x = ev.x;
- event->event.button.y = ev.y;
- event->event.button.button = button;
- event->event.button.modifiers = modifiers;
- break;
- case GPM_MOVE:
- event->event_type = pointer_motion_event;
- event->event.motion.x = ev.x;
- event->event.motion.y = ev.y;
- event->event.motion.modifiers = modifiers;
- default:
- return 0;
- }
- return 1;
-}
-
-void
-connect_to_gpm (struct console *con)
-{
- /* Only do this if we are running after dumping and really interactive */
- if (!noninteractive && initialized) {
- /* We really only want to do this on a TTY */
- CONSOLE_TTY_MOUSE_FD (con) = -1;
- if (EQ (CONSOLE_TYPE (con), Qtty)) {
- Gpm_Connect conn;
- int rval;
-
- conn.eventMask = GPM_DOWN|GPM_UP|GPM_MOVE;
- conn.defaultMask = GPM_MOVE;
- conn.minMod = 0;
- conn.maxMod = ((1<<KG_SHIFT)|(1<<KG_ALT)|(1<<KG_CTRL));
-
- rval = Gpm_Open (&conn, 0);
- switch (rval) {
- case -1: /* General failure */
- break;
- case -2: /* We are running under an XTerm */
+extern int gpm_tried;
+extern void *gpm_stack;
+
+static int (*orig_event_pending_p) (int);
+static void (*orig_next_event_cb) (struct Lisp_Event *);
+
+static Lisp_Object gpm_event_queue;
+static Lisp_Object gpm_event_queue_tail;
+
+struct __gpm_state {
+ int gpm_tried;
+ int gpm_flag;
+ void *gpm_stack;
+};
+
+static struct __gpm_state gpm_state_information[MAXDESC];
+
+static void
+store_gpm_state (int fd)
+{
+ gpm_state_information[fd].gpm_tried = gpm_tried;
+ gpm_state_information[fd].gpm_flag = gpm_flag;
+ gpm_state_information[fd].gpm_stack = gpm_stack;
+}
+
+static void
+restore_gpm_state (int fd)
+{
+ gpm_tried = gpm_state_information[fd].gpm_tried;
+ gpm_flag = gpm_state_information[fd].gpm_flag;
+ gpm_stack = gpm_state_information[fd].gpm_stack;
+ gpm_consolefd = gpm_fd = fd;
+}
+
+static void
+clear_gpm_state (int fd)
+{
+ if (fd >= 0)
+ {
+ memset(&gpm_state_information[fd], '\0', sizeof(struct __gpm_state));
+ }
+ gpm_tried = gpm_flag = 1;
+ gpm_fd = gpm_consolefd = -1;
+ gpm_stack = NULL;
+}
+
+static int
+get_process_infd (struct Lisp_Process *p)
+{
+ Lisp_Object instr, outstr;
+ get_process_streams (p, &instr, &outstr);
+ assert (!NILP (instr));
+ return filedesc_stream_fd (XLSTREAM (instr));
+}
+
+DEFUN ("receive-gpm-event", Freceive_gpm_event, 0, 2, 0, /*
+Run GPM_GetEvent().
+This function is the process handler for the GPM connection.
+*/
+ (process, string))
+{
+ Gpm_Event ev;
+ int modifiers = 0;
+ int button = 1;
+ Lisp_Object fake_event;
+ struct Lisp_Event *event = NULL;
+ struct gcpro gcpro1;
+ static int num_events;
+
+ CHECK_PROCESS (process);
+
+ restore_gpm_state (get_process_infd (XPROCESS (process)));
+
+ if (!Gpm_GetEvent(&ev))
+ {
+ warn_when_safe (Qnil, Qcritical, "Gpm_GetEvent failed - %d", gpm_fd);
+ return(Qzero);
+ }
+
+ GCPRO1(fake_event);
+
+ num_events++;
+
+ fake_event = Fmake_event (Qnil, Qnil);
+ event = XEVENT(fake_event);
+
+ event->timestamp = 0;
+ event->channel = Fselected_frame (Qnil); /* CONSOLE_SELECTED_FRAME (con); */
+
+ /* Whow, wouldn't named defines be NICE!?!?! */
+ modifiers = 0;
+
+ if (ev.modifiers & 1) modifiers |= MOD_SHIFT;
+ if (ev.modifiers & 2) modifiers |= MOD_META;
+ if (ev.modifiers & 4) modifiers |= MOD_CONTROL;
+ if (ev.modifiers & 8) modifiers |= MOD_META;
+
+ if (ev.buttons & GPM_B_LEFT)
+ {
+ button = 1;
+ }
+ else if (ev.buttons & GPM_B_MIDDLE)
+ {
+ button = 2;
+ }
+ else if (ev.buttons & GPM_B_RIGHT)
+ {
+ button = 3;
+ }
+
+ switch (GPM_BARE_EVENTS(ev.type)) {
+ case GPM_DOWN:
+ case GPM_UP:
+ event->event_type =
+ (ev.type & GPM_DOWN) ? button_press_event : button_release_event;
+ event->event.button.x = ev.x;
+ event->event.button.y = ev.y;
+ event->event.button.button = button;
+ event->event.button.modifiers = modifiers;
+ break;
+ case GPM_MOVE:
+ case GPM_DRAG:
+ event->event_type = pointer_motion_event;
+ event->event.motion.x = ev.x;
+ event->event.motion.y = ev.y;
+ event->event.motion.modifiers = modifiers;
+ default:
+ /* This will never happen */
+ break;
+ }
+
+ /* Handle the event */
+ enqueue_event (fake_event, &gpm_event_queue, &gpm_event_queue_tail);
+
+ UNGCPRO;
+
+ return (Qzero);
+}
+
+static void turn_off_gpm (char *process_name)
+{
+ Lisp_Object process = Fget_process (build_string (process_name));
+ int fd = -1;
+
+ if (NILP (process))
+ {
+ /* Something happened to our GPM process - fail silently */
+ return;
+ }
+
+ fd = get_process_infd (XPROCESS (process));
+
+ restore_gpm_state (fd);
+
Gpm_Close();
- break;
- default:
- set_descriptor_non_blocking (gpm_fd);
- CONSOLE_TTY_MOUSE_FD (con) = gpm_fd;
- }
- }
- }
+
+ clear_gpm_state (fd);
+
+ Fdelete_process (build_string (process_name));
+}
+
+#ifdef TIOCLINUX
+static Lisp_Object
+tty_get_foreign_selection (Lisp_Object selection_symbol, Lisp_Object target_type)
+{
+ /* This function can GC */
+ struct device *d = decode_device (Qnil);
+ int fd = DEVICE_INFD (d);
+ char c = 3;
+ Lisp_Object output_stream;
+ Lisp_Object terminal_stream;
+ Lisp_Object output_string;
+ struct gcpro gcpro1,gcpro2,gcpro3;
+
+ GCPRO3(output_stream,terminal_stream,output_string);
+
+ /* The ioctl() to paste actually puts things in the input queue of
+ ** the virtual console, so we need to trap that data, since we are
+ ** supposed to return the actual string selection from this
+ ** function.
+ */
+
+ /* I really hate doing this, but it doesn't seem to cause any
+ ** problems, and it makes the Lstream_read stuff further down
+ ** error out correctly instead of trying to indefinitely read from
+ ** the console.
+ **
+ ** There is no set_descriptor_blocking() function call, but in my
+ ** testing under linux, it has not proved fatal to leave the
+ ** descriptor in non-blocking mode.
+ **
+ ** William Perry Nov 5, 1999
+ */
+ set_descriptor_non_blocking (fd);
+
+ /* We need two streams, one for reading from the selected device,
+ ** and one to write the data into. There is no writable version
+ ** of the lisp-string lstream, so we make do with a resizing
+ ** buffer stream, and make a string out of it after we are
+ ** done.
+ */
+ output_stream = make_resizing_buffer_output_stream ();
+ terminal_stream = make_filedesc_input_stream (fd, 0, -1, LSTR_BLOCKED_OK);
+ output_string = Qnil;
+
+ /* #### We should arguably use a specbind() and an unwind routine here,
+ ** #### but I don't care that much right now.
+ */
+ if (NILP (output_stream) || NILP (terminal_stream))
+ {
+ /* Should we signal an error here? */
+ goto out;
+ }
+
+ if (ioctl (fd, TIOCLINUX, &c) < 0)
+ {
+ /* Could not get the selection - eek */
+ UNGCPRO;
+ return (Qnil);
+ }
+
+ while (1)
+ {
+ Bufbyte tempbuf[1024]; /* some random amount */
+ ssize_t i;
+ ssize_t size_in_bytes =
+ Lstream_read (XLSTREAM (terminal_stream),
+ tempbuf, sizeof (tempbuf));
+
+ if (size_in_bytes <= 0)
+ {
+ /* end of the stream */
+ break;
+ }
+
+ /* convert CR->LF */
+ for (i = 0; i < size_in_bytes; i++)
+ {
+ if (tempbuf[i] == '\r')
+ {
+ tempbuf[i] = '\n';
+ }
+ }
+
+ Lstream_write (XLSTREAM (output_stream), tempbuf, size_in_bytes);
+ }
+
+ Lstream_flush (XLSTREAM (output_stream));
+
+ output_string = make_string (resizing_buffer_stream_ptr (XLSTREAM (output_stream)),
+ Lstream_byte_count (XLSTREAM (output_stream)));
+
+ Lstream_delete (XLSTREAM (output_stream));
+ Lstream_delete (XLSTREAM (terminal_stream));
+
+ out:
+ UNGCPRO;
+ return (output_string);
+}
+
+static Lisp_Object
+tty_selection_exists_p (Lisp_Object selection)
+{
+ return (Qt);
}
+#endif /* TIOCLINUX */
+
+#if 0
+static Lisp_Object
+tty_own_selection (Lisp_Object selection_name, Lisp_Object selection_value)
+{
+ /* There is no way to do this cleanly - the GPM selection
+ ** 'protocol' (actually the TIOCLINUX ioctl) requires a start and
+ ** end position on the _screen_, not a string to stick in there.
+ ** Lame.
+ **
+ ** William Perry Nov 4, 1999
+ */
+}
+#endif
+
+/* This function appears to work once in a blue moon. I'm not sure
+** exactly why either. *sigh*
+**
+** William Perry Nov 4, 1999
+**
+** Apparently, this is the way (mouse-position) is supposed to work,
+** and I was just expecting something else. (mouse-pixel-position)
+** works just fine.
+**
+** William Perry Nov 7, 1999
+*/
+static int
+tty_get_mouse_position (struct device *d, Lisp_Object *frame, int *x, int *y)
+{
+ Gpm_Event ev;
+ int num_buttons;
+
+ memset(&ev,'\0',sizeof(ev));
+
+ num_buttons = Gpm_GetSnapshot(&ev);
+
+ if (!num_buttons)
+ {
+ /* This means there are events pending... */
+
+ /* #### In theory, we should drain the events pending, stick
+ ** #### them in the queue, and return the mouse position
+ ** #### anyway.
+ */
+ return(-1);
+ }
+ *x = ev.x;
+ *y = ev.y;
+ *frame = DEVICE_SELECTED_FRAME (d);
+ return (1);
+}
+
+static void
+tty_set_mouse_position (struct window *w, int x, int y)
+{
+ /*
+ #### I couldn't find any GPM functions that set the mouse position.
+ #### Mr. Perry had left this function empty; that must be why.
+ #### karlheg
+ */
+}
+
+static int gpm_event_pending_p (int user_p)
+{
+ Lisp_Object event;
+
+ EVENT_CHAIN_LOOP (event, gpm_event_queue)
+ {
+ if (!user_p || command_event_p (event))
+ {
+ return (1);
+ }
+ }
+ return (orig_event_pending_p (user_p));
+}
+
+static void gpm_next_event_cb (struct Lisp_Event *event)
+{
+ /* #### It would be nice to preserve some sort of ordering of the
+ ** #### different types of events, but that would be quite a bit
+ ** #### of work, and would more than likely break the abstraction
+ ** #### between the other event loops and this one.
+ */
+
+ if (!NILP (gpm_event_queue))
+ {
+ Lisp_Object queued_event = dequeue_event (&gpm_event_queue, &gpm_event_queue_tail);
+ *event = *(XEVENT (queued_event));
+
+ if (event->event_type == pointer_motion_event)
+ {
+ struct device *d = decode_device (event->channel);
+ int fd = DEVICE_INFD (d);
+
+ /* Ok, now this is just freaky. Bear with me though.
+ **
+ ** If you run gnuclient and attach to a XEmacs running in
+ ** X or on another TTY, the mouse cursor does not get
+ ** drawn correctly. This is because the ioctl() fails
+ ** with EPERM because the TTY specified is not our
+ ** controlling terminal. If you are the superuser, it
+ ** will work just spiffy. The appropriate source file (at
+ ** least in linux 2.2.x) is
+ ** .../linux/drivers/char/console.c in the function
+ ** tioclinux(). The following bit of code is brutal to
+ ** us:
+ **
+ ** if (current->tty != tty && !suser())
+ ** return -EPERM;
+ **
+ ** I even tried setting us as a process leader, removing
+ ** our controlling terminal, and then using the TIOCSCTTY
+ ** to set up a new controlling terminal, all with no luck.
+ **
+ ** What is even weirder is if you run XEmacs in a VC, and
+ ** attach to it from another VC with gnuclient, go back to
+ ** the original VC and hit a key, the mouse pointer
+ ** displays (in BOTH VCs), until you hit a key in the
+ ** second VC, after which it does not display in EITHER
+ ** VC. Bizarre, no?
+ **
+ ** All I can say is thank god Linux comes with source code
+ ** or I would have been completely confused. Well, ok,
+ ** I'm still completely confused. I don't see why they
+ ** don't just check the permissions on the device
+ ** (actually, if you have enough access to it to get the
+ ** console's file descriptor, you should be able to do
+ ** with it as you wish, but maybe that is just me).
+ **
+ ** William M. Perry - Nov 9, 1999
+ */
+
+ Gpm_DrawPointer (event->event.motion.x,event->event.motion.y, fd);
+ }
+
+ return;
+ }
+
+ return (orig_next_event_cb (event));
+}
+
+static void hook_event_callbacks_once (void)
+{
+ static int hooker;
+
+ if (!hooker)
+ {
+ orig_event_pending_p = event_stream->event_pending_p;
+ orig_next_event_cb = event_stream->next_event_cb;
+ event_stream->event_pending_p = gpm_event_pending_p;
+ event_stream->next_event_cb = gpm_next_event_cb;
+ hooker = 1;
+ }
+}
+
+static void hook_console_methods_once (void)
+{
+ static int hooker;
+ if (!hooker)
+ {
+ /* Install the mouse position methods for the TTY console type */
+ CONSOLE_HAS_METHOD (tty, get_mouse_position);
+ CONSOLE_HAS_METHOD (tty, set_mouse_position);
+ CONSOLE_HAS_METHOD (tty, get_foreign_selection);
+ CONSOLE_HAS_METHOD (tty, selection_exists_p);
+#if 0
+ CONSOLE_HAS_METHOD (tty, own_selection);
#endif
+ }
+}
+
+DEFUN ("gpm-enabled-p", Fgpm_enabled_p, 0, 1, 0, /*
+Return non-nil if GPM mouse support is currently enabled on DEVICE.
+*/
+ (device))
+{
+ char *console_name = ttyname (DEVICE_INFD (decode_device (device)));
+ char process_name[1024];
+ Lisp_Object proc;
+
+ if (!console_name)
+ {
+ return (Qnil);
+ }
+
+ memset (process_name, '\0', sizeof(process_name));
+ snprintf (process_name, sizeof(process_name) - 1, "gpm for %s", console_name);
+
+ proc = Fget_process (build_string (process_name));
+
+ if (NILP (proc))
+ {
+ return (Qnil);
+ }
+
+ if (1) /* (PROCESS_LIVE_P (proc)) */
+ {
+ return (Qt);
+ }
+ return (Qnil);
+}
+
+DEFUN ("gpm-enable", Fgpm_enable, 0, 2, 0, /*
+Toggle accepting of GPM mouse events.
+*/
+ (device, arg))
+{
+ Gpm_Connect conn;
+ int rval;
+ Lisp_Object gpm_process;
+ Lisp_Object gpm_filter;
+ struct device *d = decode_device (device);
+ int fd = DEVICE_INFD (d);
+ char *console_name = ttyname (fd);
+ char process_name[1024];
+
+ hook_event_callbacks_once ();
+ hook_console_methods_once ();
+
+ if (noninteractive)
+ {
+ error ("Can't connect to GPM in batch mode.");
+ }
+
+ if (!console_name)
+ {
+ /* Something seriously wrong here... */
+ return (Qnil);
+ }
+
+ memset (process_name, '\0', sizeof(process_name));
+ snprintf (process_name, sizeof(process_name) - 1, "gpm for %s", console_name);
+
+ if (NILP (arg))
+ {
+ turn_off_gpm (process_name);
+ return (Qnil);
+ }
+
+ /* DANGER DANGER.
+ ** Though shalt not call (gpm-enable t) after we have already
+ ** started, or stuff blows up.
+ */
+ if (!NILP (Fgpm_enabled_p (device)))
+ {
+ error ("GPM already enabled for this console.");
+ }
+
+ conn.eventMask = GPM_DOWN|GPM_UP|GPM_MOVE|GPM_DRAG;
+ conn.defaultMask = GPM_MOVE;
+ conn.minMod = 0;
+ conn.maxMod = ((1<<KG_SHIFT)|(1<<KG_ALT)|(1<<KG_CTRL));
+
+ /* Reset some silly static variables so that multiple Gpm_Open()
+ ** calls have even a sligh chance of working
+ */
+ gpm_tried = 0;
+ gpm_flag = 0;
+ gpm_stack = NULL;
+
+ /* Make sure Gpm_Open() does ioctl() on the correct
+ ** descriptor, or it can get the wrong terminal sizes, etc.
+ */
+ gpm_consolefd = fd;
+
+ /* We have to pass the virtual console manually, otherwise if you
+ ** use 'gnuclient -nw' to connect to an XEmacs that is running in
+ ** X, Gpm_Open() tries to use ttyname(0 | 1 | 2) to find out which
+ ** console you are using, which is of course not correct for the
+ ** new tty device.
+ */
+ if (strncmp (console_name, "/dev/tty",8) || !isdigit (console_name[8]))
+ {
+ /* Urk, something really wrong */
+ return (Qnil);
+ }
+
+ rval = Gpm_Open (&conn, atoi(console_name + 8));
+
+ switch (rval) {
+ case -1: /* General failure */
+ break;
+ case -2: /* We are running under an XTerm */
+ Gpm_Close();
+ break;
+ default:
+ /* Is this really necessary? */
+ set_descriptor_non_blocking (gpm_fd);
+ store_gpm_state (gpm_fd);
+ gpm_process = connect_to_file_descriptor (build_string (process_name), Qnil,
+ make_int (gpm_fd),
+ make_int (gpm_fd));
+
+ if (!NILP (gpm_process))
+ {
+ rval = 0;
+ Fprocess_kill_without_query (gpm_process, Qnil);
+ XSETSUBR (gpm_filter, &SFreceive_gpm_event);
+ set_process_filter (gpm_process, gpm_filter, 1);
+
+ /* Keep track of the device for later */
+ /* Fput (gpm_process, intern ("gpm-device"), device); */
+ }
+ else
+ {
+ Gpm_Close();
+ rval = -1;
+ }
+ }
+
+ return(rval ? Qnil : Qt);
+}
+
+void vars_of_gpmevent (void)
+{
+ gpm_event_queue = Qnil;
+ gpm_event_queue_tail = Qnil;
+ staticpro (&gpm_event_queue);
+ staticpro (&gpm_event_queue_tail);
+ pdump_wire (&gpm_event_queue);
+ pdump_wire (&gpm_event_queue_tail);
+}
+
+void syms_of_gpmevent (void)
+{
+ DEFSUBR (Freceive_gpm_event);
+ DEFSUBR (Fgpm_enable);
+ DEFSUBR (Fgpm_enabled_p);
+}
+
+#endif /* HAVE_GPM */
projects / chise / xemacs-chise.git.1 / blobdiff