ncurses 5.6 - patch 20080925
[ncurses.git] / ncurses / base / lib_mouse.c
index 0555f1fd2ce74a7cc3f88adfdc9c0530634d9f61..731025e30d3a12666ea06cc6888202c4b32bb18e 100644 (file)
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2000,2002 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
 /****************************************************************************
  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
  ****************************************************************************/
 
 /*
  * This module is intended to encapsulate ncurses's interface to pointing
  * devices.
  *
- * The first method used is xterm's internal mouse-tracking facility.
- * The second is Alessandro Rubini's GPM server.
+ * The primary method used is xterm's internal mouse-tracking facility.
+ * Additional methods depend on the platform:
+ *     Alessandro Rubini's GPM server (Linux)
+ *     sysmouse (FreeBSD)
+ *     special-purpose mouse interface for OS/2 EMX.
  *
  * Notes for implementors of new mouse-interface methods:
  *
 #endif
 
 #include <curses.priv.h>
+
+MODULE_ID("$Id: lib_mouse.c,v 1.99 2008/09/25 21:47:51 tom Exp $")
+
 #include <term.h>
+#include <tic.h>
 
 #if USE_GPM_SUPPORT
-#ifndef LINT                   /* don't need this for llib-lncurses */
-#undef buttons                 /* term.h defines this, and gpm uses it! */
-#include <gpm.h>
 #include <linux/keyboard.h>    /* defines KG_* macros */
+
+#ifdef HAVE_LIBDL
+/* use dynamic loader to avoid linkage dependency */
+#include <dlfcn.h>
+
+#ifdef RTLD_NOW
+#define my_RTLD RTLD_NOW
+#else
+#ifdef RTLD_LAZY
+#define my_RTLD RTLD_LAZY
+#else
+make an error
 #endif
+#endif                         /* RTLD_NOW */
+#endif                         /* HAVE_LIBDL */
+
+#endif                         /* USE_GPM_SUPPORT */
+
+#if USE_SYSMOUSE
+#undef buttons                 /* symbol conflict in consio.h */
+#undef mouse_info              /* symbol conflict in consio.h */
+#include <osreldate.h>
+#if (__FreeBSD_version >= 400017)
+#include <sys/consio.h>
+#include <sys/fbio.h>
+#else
+#include <machine/console.h>
 #endif
-
-MODULE_ID("$Id: lib_mouse.c,v 1.61 2002/09/28 16:08:58 tom Exp $")
+#endif                         /* use_SYSMOUSE */
 
 #define MY_TRACE TRACE_ICALLS|TRACE_IEVENT
 
-#define INVALID_EVENT  -1
+#define        MASK_RELEASE(x)         NCURSES_MOUSE_MASK(x, 001)
+#define        MASK_PRESS(x)           NCURSES_MOUSE_MASK(x, 002)
+#define        MASK_CLICK(x)           NCURSES_MOUSE_MASK(x, 004)
+#define        MASK_DOUBLE_CLICK(x)    NCURSES_MOUSE_MASK(x, 010)
+#define        MASK_TRIPLE_CLICK(x)    NCURSES_MOUSE_MASK(x, 020)
+#define        MASK_RESERVED_EVENT(x)  NCURSES_MOUSE_MASK(x, 040)
+
+#if NCURSES_MOUSE_VERSION == 1
+#define BUTTON_CLICKED        (BUTTON1_CLICKED        | BUTTON2_CLICKED        | BUTTON3_CLICKED        | BUTTON4_CLICKED)
+#define BUTTON_PRESSED        (BUTTON1_PRESSED        | BUTTON2_PRESSED        | BUTTON3_PRESSED        | BUTTON4_PRESSED)
+#define BUTTON_RELEASED       (BUTTON1_RELEASED       | BUTTON2_RELEASED       | BUTTON3_RELEASED       | BUTTON4_RELEASED)
+#define BUTTON_DOUBLE_CLICKED (BUTTON1_DOUBLE_CLICKED | BUTTON2_DOUBLE_CLICKED | BUTTON3_DOUBLE_CLICKED | BUTTON4_DOUBLE_CLICKED)
+#define BUTTON_TRIPLE_CLICKED (BUTTON1_TRIPLE_CLICKED | BUTTON2_TRIPLE_CLICKED | BUTTON3_TRIPLE_CLICKED | BUTTON4_TRIPLE_CLICKED)
+#define MAX_BUTTONS  4
+#else
+#define BUTTON_CLICKED        (BUTTON1_CLICKED        | BUTTON2_CLICKED        | BUTTON3_CLICKED        | BUTTON4_CLICKED        | BUTTON5_CLICKED)
+#define BUTTON_PRESSED        (BUTTON1_PRESSED        | BUTTON2_PRESSED        | BUTTON3_PRESSED        | BUTTON4_PRESSED        | BUTTON5_PRESSED)
+#define BUTTON_RELEASED       (BUTTON1_RELEASED       | BUTTON2_RELEASED       | BUTTON3_RELEASED       | BUTTON4_RELEASED       | BUTTON5_RELEASED)
+#define BUTTON_DOUBLE_CLICKED (BUTTON1_DOUBLE_CLICKED | BUTTON2_DOUBLE_CLICKED | BUTTON3_DOUBLE_CLICKED | BUTTON4_DOUBLE_CLICKED | BUTTON5_DOUBLE_CLICKED)
+#define BUTTON_TRIPLE_CLICKED (BUTTON1_TRIPLE_CLICKED | BUTTON2_TRIPLE_CLICKED | BUTTON3_TRIPLE_CLICKED | BUTTON4_TRIPLE_CLICKED | BUTTON5_TRIPLE_CLICKED)
+#define MAX_BUTTONS  5
+#endif
 
-static int mousetype;
-#define M_XTERM                -1      /* use xterm's mouse tracking? */
-#define M_NONE         0       /* no mouse device */
-#define M_GPM          1       /* use GPM */
-#define M_QNX          2       /* QNX mouse on console */
-#define M_QNX_TERM     3       /* QNX mouse on pterm/xterm (using qansi-m) */
+#define INVALID_EVENT  -1
+#define NORMAL_EVENT   0
 
 #if USE_GPM_SUPPORT
-#ifndef LINT
-static Gpm_Connect gpm_connect;
-#endif
+
+#ifndef LIBGPM_SONAME
+#define LIBGPM_SONAME "libgpm.so"
 #endif
 
-static mmask_t eventmask;      /* current event mask */
+#define GET_DLSYM(name) (my_##name = (TYPE_##name) dlsym(SP->_dlopen_gpm, #name))
+
+#endif                         /* USE_GPM_SUPPORT */
 
-static bool _nc_mouse_parse(int);
+static bool _nc_mouse_parse(SCREEN *, int);
 static void _nc_mouse_resume(SCREEN *);
 static void _nc_mouse_wrap(SCREEN *);
 
 /* maintain a circular list of mouse events */
 
-/* The definition of the circular list size (EV_MAX), is in curses.priv.h, so
- * wgetch() may refer to the size and call _nc_mouse_parse() before circular
- * list overflow.
- */
-static MEVENT events[EV_MAX];  /* hold the last mouse event seen */
-static MEVENT *eventp = events;        /* next free slot in event queue */
-#define NEXT(ep)       ((ep == events + EV_MAX - 1) ? events : ep + 1)
-#define PREV(ep)       ((ep == events) ? events + EV_MAX - 1 : ep - 1)
+#define FirstEV(sp)    ((sp)->_mouse_events)
+#define LastEV(sp)     ((sp)->_mouse_events + EV_MAX - 1)
+
+#undef  NEXT
+#define NEXT(ep)       ((ep >= LastEV(sp)) \
+                        ? FirstEV(sp) \
+                        : ep + 1)
+
+#undef  PREV
+#define PREV(ep)       ((ep <= FirstEV(sp)) \
+                        ? LastEV(sp) \
+                        : ep - 1)
+
+#define IndexEV(sp, ep)        (ep - FirstEV(sp))
+
+#define RunParams(sp, eventp, runp) \
+               (long) IndexEV(sp, runp), \
+               (long) (IndexEV(sp, eventp) + (EV_MAX - 1)) % EV_MAX
 
 #ifdef TRACE
 static void
-_trace_slot(const char *tag)
+_trace_slot(SCREEN *sp, const char *tag)
 {
     MEVENT *ep;
 
     _tracef(tag);
 
-    for (ep = events; ep < events + EV_MAX; ep++)
+    for (ep = FirstEV(sp); ep <= LastEV(sp); ep++)
        _tracef("mouse event queue slot %ld = %s",
-               (long) (ep - events),
-               _tracemouse(ep));
+               (long) IndexEV(sp, ep),
+               _nc_tracemouse(sp, ep));
 }
 #endif
 
-#ifdef USE_EMX_MOUSE
+#if USE_EMX_MOUSE
 
 #  define TOP_ROW          0
 #  define LEFT_COL         0
 
-static int mouse_wfd;
-static int mouse_thread;
-static int mouse_activated;
-static char mouse_buttons[] =
-{0, 1, 3, 2};
-
 #  define M_FD(sp) sp->_mouse_fd
 
 static void
-write_event(int down, int button, int x, int y)
+write_event(SCREEN *sp, int down, int button, int x, int y)
 {
     char buf[6];
     unsigned long ignore;
@@ -158,12 +211,13 @@ write_event(int down, int button, int x, int y)
     buf[3] = ' ' + (button - 1) + (down ? 0 : 0x40);
     buf[4] = ' ' + x - LEFT_COL + 1;
     buf[5] = ' ' + y - TOP_ROW + 1;
-    DosWrite(mouse_wfd, buf, 6, &ignore);
+    DosWrite(sp->_emxmouse_wfd, buf, 6, &ignore);
 }
 
 static void
-mouse_server(unsigned long ignored GCC_UNUSED)
+mouse_server(unsigned long param)
 {
+    SCREEN *sp = (SCREEN *) param;
     unsigned short fWait = MOU_WAIT;
     /* NOPTRRECT mourt = { 0,0,24,79 }; */
     MOUEVENTINFO mouev;
@@ -190,7 +244,7 @@ mouse_server(unsigned long ignored GCC_UNUSED)
                    sprintf(err, "Error reading mouse queue, rc=%lu.\r\n", rc);
                    break;
                }
-               if (!mouse_activated)
+               if (!sp->_emxmouse_activated)
                    goto finish;
 
                /*
@@ -202,13 +256,13 @@ mouse_server(unsigned long ignored GCC_UNUSED)
                 */
                if ((mouev.fs ^ oldstate) & MOUSE_BN1_DOWN)
                    write_event(mouev.fs & MOUSE_BN1_DOWN,
-                               mouse_buttons[1], mouev.col, mouev.row);
+                               sp->_emxmouse_buttons[1], mouev.col, mouev.row);
                if ((mouev.fs ^ oldstate) & MOUSE_BN2_DOWN)
                    write_event(mouev.fs & MOUSE_BN2_DOWN,
-                               mouse_buttons[3], mouev.col, mouev.row);
+                               sp->_emxmouse_buttons[3], mouev.col, mouev.row);
                if ((mouev.fs ^ oldstate) & MOUSE_BN3_DOWN)
                    write_event(mouev.fs & MOUSE_BN3_DOWN,
-                               mouse_buttons[2], mouev.col, mouev.row);
+                               sp->_emxmouse_buttons[2], mouev.col, mouev.row);
 
              finish:
                oldstate = mouev.fs;
@@ -223,108 +277,373 @@ mouse_server(unsigned long ignored GCC_UNUSED)
     DosExit(EXIT_THREAD, 0L);
 }
 
+#endif /* USE_EMX_MOUSE */
+
+#if USE_SYSMOUSE
+static void
+sysmouse_server(SCREEN *sp)
+{
+    struct mouse_info the_mouse;
+    MEVENT *work;
+
+    the_mouse.operation = MOUSE_GETINFO;
+    if (sp != 0
+       && sp->_mouse_fd >= 0
+       && sp->_sysmouse_tail < FIFO_SIZE
+       && ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse) != -1) {
+
+       if (sp->_sysmouse_head > sp->_sysmouse_tail) {
+           sp->_sysmouse_tail = 0;
+           sp->_sysmouse_head = 0;
+       }
+       work = &(sp->_sysmouse_fifo[sp->_sysmouse_tail]);
+       memset(work, 0, sizeof(*work));
+       work->id = NORMAL_EVENT;        /* there's only one mouse... */
+
+       sp->_sysmouse_old_buttons = sp->_sysmouse_new_buttons;
+       sp->_sysmouse_new_buttons = the_mouse.u.data.buttons & 0x7;
+
+       if (sp->_sysmouse_new_buttons) {
+           if (sp->_sysmouse_new_buttons & 1)
+               work->bstate |= BUTTON1_PRESSED;
+           if (sp->_sysmouse_new_buttons & 2)
+               work->bstate |= BUTTON2_PRESSED;
+           if (sp->_sysmouse_new_buttons & 4)
+               work->bstate |= BUTTON3_PRESSED;
+       } else {
+           if (sp->_sysmouse_old_buttons & 1)
+               work->bstate |= BUTTON1_RELEASED;
+           if (sp->_sysmouse_old_buttons & 2)
+               work->bstate |= BUTTON2_RELEASED;
+           if (sp->_sysmouse_old_buttons & 4)
+               work->bstate |= BUTTON3_RELEASED;
+       }
+
+       /* for cosmetic bug in syscons.c on FreeBSD 3.[34] */
+       the_mouse.operation = MOUSE_HIDE;
+       ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse);
+       the_mouse.operation = MOUSE_SHOW;
+       ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse);
+
+       /*
+        * We're only interested if the button is pressed or released.
+        * FIXME: implement continuous event-tracking.
+        */
+       if (sp->_sysmouse_new_buttons != sp->_sysmouse_old_buttons) {
+           sp->_sysmouse_tail += 1;
+       }
+       work->x = the_mouse.u.data.x / sp->_sysmouse_char_width;
+       work->y = the_mouse.u.data.y / sp->_sysmouse_char_height;
+    }
+}
+
+static void
+handle_sysmouse(int sig GCC_UNUSED)
+{
+    sysmouse_server(SP);
+}
+#endif /* USE_SYSMOUSE */
+
+static void
+init_xterm_mouse(SCREEN *sp)
+{
+    sp->_mouse_type = M_XTERM;
+    sp->_mouse_xtermcap = tigetstr("XM");
+    if (!VALID_STRING(sp->_mouse_xtermcap))
+       sp->_mouse_xtermcap = "\033[?1000%?%p1%{1}%=%th%el%;";
+}
+
+static void
+enable_xterm_mouse(SCREEN *sp, int enable)
+{
+#if USE_EMX_MOUSE
+    sp->_emxmouse_activated = enable;
+#else
+    putp(TPARM_1(sp->_mouse_xtermcap, enable));
+#endif
+    sp->_mouse_active = enable;
+}
+
+#if USE_GPM_SUPPORT
+static int
+allow_gpm_mouse(void)
+{
+    /* GPM does printf's without checking if stdout is a terminal */
+    if (isatty(fileno(stdout))) {
+       char *env = getenv("TERM");
+       /* GPM checks the beginning of the $TERM variable to decide if
+        * it should pass xterm events through.  There is no real advantage
+        * in allowing GPM to do this.
+        */
+       if (env == 0 || strncmp(env, "xterm", 5))
+           return TRUE;
+    }
+    return FALSE;
+}
+
+#ifdef HAVE_LIBDL
+static void
+unload_gpm_library(SCREEN *sp)
+{
+    if (SP->_dlopen_gpm != 0) {
+       T(("unload GPM library"));
+       sp->_mouse_gpm_loaded = FALSE;
+       dlclose(sp->_dlopen_gpm);
+       sp->_dlopen_gpm = 0;
+    }
+}
+
 static void
-server_state(const int state)
-{                              /* It would be nice to implement pointer-off and stop looping... */
-    mouse_activated = state;
+load_gpm_library(SCREEN *sp)
+{
+    sp->_mouse_gpm_found = FALSE;
+    if ((sp->_dlopen_gpm = dlopen(LIBGPM_SONAME, my_RTLD)) != 0) {
+       if (GET_DLSYM(gpm_fd) == 0 ||
+           GET_DLSYM(Gpm_Open) == 0 ||
+           GET_DLSYM(Gpm_Close) == 0 ||
+           GET_DLSYM(Gpm_GetEvent) == 0) {
+           T(("GPM initialization failed: %s", dlerror()));
+           unload_gpm_library(sp);
+       } else {
+           sp->_mouse_gpm_found = TRUE;
+           sp->_mouse_gpm_loaded = TRUE;
+       }
+    }
 }
+#endif
 
+static bool
+enable_gpm_mouse(SCREEN *sp, bool enable)
+{
+    bool result;
+
+    T((T_CALLED("enable_gpm_mouse(%d)"), enable));
+
+    if (enable && !sp->_mouse_active) {
+#ifdef HAVE_LIBDL
+       if (sp->_mouse_gpm_found && !sp->_mouse_gpm_loaded) {
+           load_gpm_library(sp);
+       }
 #endif
+       if (sp->_mouse_gpm_loaded) {
+           /* GPM: initialize connection to gpm server */
+           sp->_mouse_gpm_connect.eventMask = GPM_DOWN | GPM_UP;
+           sp->_mouse_gpm_connect.defaultMask =
+               (unsigned short) (~(sp->_mouse_gpm_connect.eventMask | GPM_HARD));
+           sp->_mouse_gpm_connect.minMod = 0;
+           sp->_mouse_gpm_connect.maxMod =
+               (unsigned short) (~((1 << KG_SHIFT) |
+                                   (1 << KG_SHIFTL) |
+                                   (1 << KG_SHIFTR)));
+           /*
+            * Note: GPM hardcodes \E[?1001s and \E[?1000h during its open.
+            * The former is recognized by wscons (SunOS), and the latter by
+            * xterm.  Those will not show up in ncurses' traces.
+            */
+           result = (my_Gpm_Open(&sp->_mouse_gpm_connect, 0) >= 0);
+       } else {
+           result = FALSE;
+       }
+       sp->_mouse_active = result;
+       T(("GPM open %s", result ? "succeeded" : "failed"));
+    } else {
+       if (!enable && sp->_mouse_active) {
+           /* GPM: close connection to gpm server */
+           my_Gpm_Close();
+           sp->_mouse_active = FALSE;
+           T(("GPM closed"));
+       }
+       result = enable;
+    }
+#ifdef HAVE_LIBDL
+    if (!result) {
+       unload_gpm_library(sp);
+    }
+#endif
+    returnBool(result);
+}
+#endif /* USE_GPM_SUPPORT */
 
-static int initialized;
+#define xterm_kmous "\033[M"
 
 static void
-initialize_mousetype(void)
+initialize_mousetype(SCREEN *sp)
 {
-    static const char *xterm_kmous = "\033[M";
+    T((T_CALLED("initialize_mousetype()")));
 
     /* Try gpm first, because gpm may be configured to run in xterm */
 #if USE_GPM_SUPPORT
-    /* GPM: initialize connection to gpm server */
-    gpm_connect.eventMask = GPM_DOWN | GPM_UP;
-    gpm_connect.defaultMask = ~(gpm_connect.eventMask | GPM_HARD);
-    gpm_connect.minMod = 0;
-    gpm_connect.maxMod = ~((1 << KG_SHIFT) | (1 << KG_SHIFTL) | (1 << KG_SHIFTR));
-    if (Gpm_Open(&gpm_connect, 0) >= 0) {      /* returns the file-descriptor */
-       mousetype = M_GPM;
-       SP->_mouse_fd = gpm_fd;
-       return;
-    }
+    if (allow_gpm_mouse()) {
+       if (!sp->_mouse_gpm_loaded) {
+#ifdef HAVE_LIBDL
+           load_gpm_library(sp);
+#else /* !HAVE_LIBDL */
+           sp->_mouse_gpm_found = TRUE;
+           sp->_mouse_gpm_loaded = TRUE;
 #endif
+       }
+
+       /*
+        * The gpm_fd file-descriptor may be negative (xterm).  So we have to
+        * maintain our notion of whether the mouse connection is active
+        * without testing the file-descriptor.
+        */
+       if (sp->_mouse_gpm_found && enable_gpm_mouse(sp, TRUE)) {
+           sp->_mouse_type = M_GPM;
+           sp->_mouse_fd = *(my_gpm_fd);
+           T(("GPM mouse_fd %d", sp->_mouse_fd));
+           returnVoid;
+       }
+    }
+#endif /* USE_GPM_SUPPORT */
 
     /* OS/2 VIO */
-#ifdef USE_EMX_MOUSE
-    if (!mouse_thread
+#if USE_EMX_MOUSE
+    if (!sp->_emxmouse_thread
        && strstr(cur_term->type.term_names, "xterm") == 0
        && key_mouse) {
        int handles[2];
 
        if (pipe(handles) < 0) {
            perror("mouse pipe error");
-           return;
+           returnVoid;
        } else {
            int rc;
 
-           if (!mouse_buttons[0]) {
+           if (!sp->_emxmouse_buttons[0]) {
                char *s = getenv("MOUSE_BUTTONS_123");
 
-               mouse_buttons[0] = 1;
+               sp->_emxmouse_buttons[0] = 1;
                if (s && strlen(s) >= 3) {
-                   mouse_buttons[1] = s[0] - '0';
-                   mouse_buttons[2] = s[1] - '0';
-                   mouse_buttons[3] = s[2] - '0';
+                   sp->_emxmouse_buttons[1] = s[0] - '0';
+                   sp->_emxmouse_buttons[2] = s[1] - '0';
+                   sp->_emxmouse_buttons[3] = s[2] - '0';
+               } else {
+                   sp->_emxmouse_buttons[1] = 1;
+                   sp->_emxmouse_buttons[2] = 3;
+                   sp->_emxmouse_buttons[3] = 2;
                }
            }
-           mouse_wfd = handles[1];
-           M_FD(SP) = handles[0];
+           sp->_emxmouse_wfd = handles[1];
+           M_FD(sp) = handles[0];
            /* Needed? */
            setmode(handles[0], O_BINARY);
            setmode(handles[1], O_BINARY);
            /* Do not use CRT functions, we may single-threaded. */
-           rc = DosCreateThread((unsigned long *) &mouse_thread,
-                                mouse_server, 0, 0, 8192);
+           rc = DosCreateThread((unsigned long *) &sp->_emxmouse_thread,
+                                mouse_server, sp, 0, 8192);
            if (rc) {
                printf("mouse thread error %d=%#x", rc, rc);
-               return;
            } else {
-               mousetype = M_XTERM;
-               return;
+               sp->_mouse_type = M_XTERM;
            }
+           returnVoid;
        }
     }
-#endif
+#endif /* USE_EMX_MOUSE */
+
+#if USE_SYSMOUSE
+    {
+       struct mouse_info the_mouse;
+       char *the_device = 0;
+
+       if (isatty(sp->_ifd))
+           the_device = ttyname(sp->_ifd);
+       if (the_device == 0)
+           the_device = "/dev/tty";
+
+       sp->_mouse_fd = open(the_device, O_RDWR);
+
+       if (sp->_mouse_fd >= 0) {
+           /*
+            * sysmouse does not have a usable user interface for obtaining
+            * mouse events.  The logical way to proceed (reading data on a
+            * stream) only works if one opens the device as root.  Even in
+            * that mode, careful examination shows we lose events
+            * occasionally.  The interface provided for user programs is to
+            * establish a signal handler.  really.
+            *
+            * Take over SIGUSR2 for this purpose since SIGUSR1 is more
+            * likely to be used by an application.  getch() will have to
+            * handle the misleading EINTR's.
+            */
+           signal(SIGUSR2, SIG_IGN);
+           the_mouse.operation = MOUSE_MODE;
+           the_mouse.u.mode.mode = 0;
+           the_mouse.u.mode.signal = SIGUSR2;
+           if (ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse) != -1) {
+               signal(SIGUSR2, handle_sysmouse);
+               the_mouse.operation = MOUSE_SHOW;
+               ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse);
+
+#if defined(FBIO_MODEINFO) || defined(CONS_MODEINFO)   /* FreeBSD > 2.x */
+               {
+#ifndef FBIO_GETMODE           /* FreeBSD 3.x */
+#define FBIO_GETMODE    CONS_GET
+#define FBIO_MODEINFO   CONS_MODEINFO
+#endif /* FBIO_GETMODE */
+                   video_info_t the_video;
+
+                   if (ioctl(sp->_mouse_fd,
+                             FBIO_GETMODE,
+                             &the_video.vi_mode) != -1
+                       && ioctl(sp->_mouse_fd,
+                                FBIO_MODEINFO,
+                                &the_video) != -1) {
+                       sp->_sysmouse_char_width = the_video.vi_cwidth;
+                       sp->_sysmouse_char_height = the_video.vi_cheight;
+                   }
+               }
+#endif /* defined(FBIO_MODEINFO) || defined(CONS_MODEINFO) */
+
+               if (sp->_sysmouse_char_width <= 0)
+                   sp->_sysmouse_char_width = 8;
+               if (sp->_sysmouse_char_height <= 0)
+                   sp->_sysmouse_char_height = 16;
+               sp->_mouse_type = M_SYSMOUSE;
+               returnVoid;
+           }
+       }
+    }
+#endif /* USE_SYSMOUSE */
 
     /* we know how to recognize mouse events under "xterm" */
     if (key_mouse != 0) {
-       if (!strcmp(key_mouse, xterm_kmous)) {
-           mousetype = M_XTERM;
-           return;
+       if (!strcmp(key_mouse, xterm_kmous)
+           || strstr(cur_term->type.term_names, "xterm") != 0) {
+           init_xterm_mouse(sp);
        }
     } else if (strstr(cur_term->type.term_names, "xterm") != 0) {
-       (void) _nc_add_to_try(&(SP->_keytry), xterm_kmous, KEY_MOUSE);
-       mousetype = M_XTERM;
-       return;
+       if (_nc_add_to_try(&(sp->_keytry), xterm_kmous, KEY_MOUSE) == OK)
+           init_xterm_mouse(sp);
     }
+    returnVoid;
 }
 
-static void
-_nc_mouse_init(void)
+static bool
+_nc_mouse_init(SCREEN *sp)
 /* initialize the mouse */
 {
+    bool result = FALSE;
     int i;
 
-    if (!initialized) {
-       initialized = TRUE;
+    if (sp != 0) {
+       if (!sp->_mouse_initialized) {
+           sp->_mouse_initialized = TRUE;
 
-       TR(MY_TRACE, ("_nc_mouse_init() called"));
+           TR(MY_TRACE, ("_nc_mouse_init() called"));
 
-       for (i = 0; i < EV_MAX; i++)
-           events[i].id = INVALID_EVENT;
+           sp->_mouse_eventp = FirstEV(sp);
+           for (i = 0; i < EV_MAX; i++)
+               sp->_mouse_events[i].id = INVALID_EVENT;
 
-       initialize_mousetype();
+           initialize_mousetype(sp);
 
-       T(("_nc_mouse_init() set mousetype to %d", mousetype));
+           T(("_nc_mouse_init() set mousetype to %d", sp->_mouse_type));
+       }
+       result = sp->_mouse_initialized;
     }
+    return result;
 }
 
 /*
@@ -332,76 +651,120 @@ _nc_mouse_init(void)
  * fifo_push() in lib_getch.c
  */
 static bool
-_nc_mouse_event(SCREEN * sp GCC_UNUSED)
+_nc_mouse_event(SCREEN *sp GCC_UNUSED)
 {
-#if USE_GPM_SUPPORT
-    /* GPM: query server for event, return TRUE if we find one */
-    Gpm_Event ev;
+    MEVENT *eventp = sp->_mouse_eventp;
+    bool result = FALSE;
 
-    if (Gpm_GetEvent(&ev) == 1) {
-       eventp->id = 0;         /* there's only one mouse... */
+    (void) eventp;
 
-       eventp->bstate = 0;
-       switch (ev.type & 0x0f) {
-       case (GPM_DOWN):
-           if (ev.buttons & GPM_B_LEFT)
-               eventp->bstate |= BUTTON1_PRESSED;
-           if (ev.buttons & GPM_B_MIDDLE)
-               eventp->bstate |= BUTTON2_PRESSED;
-           if (ev.buttons & GPM_B_RIGHT)
-               eventp->bstate |= BUTTON3_PRESSED;
-           break;
-       case (GPM_UP):
-           if (ev.buttons & GPM_B_LEFT)
-               eventp->bstate |= BUTTON1_RELEASED;
-           if (ev.buttons & GPM_B_MIDDLE)
-               eventp->bstate |= BUTTON2_RELEASED;
-           if (ev.buttons & GPM_B_RIGHT)
-               eventp->bstate |= BUTTON3_RELEASED;
-           break;
-       default:
-           break;
+    switch (sp->_mouse_type) {
+    case M_XTERM:
+       /* xterm: never have to query, mouse events are in the keyboard stream */
+#if USE_EMX_MOUSE
+       {
+           char kbuf[3];
+
+           int i, res = read(M_FD(sp), &kbuf, 3);      /* Eat the prefix */
+           if (res != 3)
+               printf("Got %d chars instead of 3 for prefix.\n", res);
+           for (i = 0; i < res; i++) {
+               if (kbuf[i] != key_mouse[i])
+                   printf("Got char %d instead of %d for prefix.\n",
+                          (int) kbuf[i], (int) key_mouse[i]);
+           }
+           result = TRUE;
        }
+#endif /* USE_EMX_MOUSE */
+       break;
 
-       eventp->x = ev.x - 1;
-       eventp->y = ev.y - 1;
-       eventp->z = 0;
+#if USE_GPM_SUPPORT
+    case M_GPM:
+       {
+           /* query server for event, return TRUE if we find one */
+           Gpm_Event ev;
+
+           if (my_Gpm_GetEvent(&ev) == 1) {
+               /* there's only one mouse... */
+               eventp->id = NORMAL_EVENT;
+
+               eventp->bstate = 0;
+               switch (ev.type & 0x0f) {
+               case (GPM_DOWN):
+                   if (ev.buttons & GPM_B_LEFT)
+                       eventp->bstate |= BUTTON1_PRESSED;
+                   if (ev.buttons & GPM_B_MIDDLE)
+                       eventp->bstate |= BUTTON2_PRESSED;
+                   if (ev.buttons & GPM_B_RIGHT)
+                       eventp->bstate |= BUTTON3_PRESSED;
+                   break;
+               case (GPM_UP):
+                   if (ev.buttons & GPM_B_LEFT)
+                       eventp->bstate |= BUTTON1_RELEASED;
+                   if (ev.buttons & GPM_B_MIDDLE)
+                       eventp->bstate |= BUTTON2_RELEASED;
+                   if (ev.buttons & GPM_B_RIGHT)
+                       eventp->bstate |= BUTTON3_RELEASED;
+                   break;
+               default:
+                   break;
+               }
 
-       /* bump the next-free pointer into the circular list */
-       eventp = NEXT(eventp);
-       return (TRUE);
-    }
+               eventp->x = ev.x - 1;
+               eventp->y = ev.y - 1;
+               eventp->z = 0;
+
+               /* bump the next-free pointer into the circular list */
+               sp->_mouse_eventp = eventp = NEXT(eventp);
+               result = TRUE;
+           }
+       }
+       break;
 #endif
 
-#ifdef USE_EMX_MOUSE
-    {
-       char kbuf[3];
-
-       int i, res = read(M_FD(sp), &kbuf, 3);  /* Eat the prefix */
-       if (res != 3)
-           printf("Got %d chars instead of 3 for prefix.\n", res);
-       for (i = 0; i < res; i++) {
-           if (kbuf[i] != key_mouse[i])
-               printf("Got char %d instead of %d for prefix.\n",
-                      (int) kbuf[i], (int) key_mouse[i]);
+#if USE_SYSMOUSE
+    case M_SYSMOUSE:
+       if (sp->_sysmouse_head < sp->_sysmouse_tail) {
+           *eventp = sp->_sysmouse_fifo[sp->_sysmouse_head];
+
+           /*
+            * Point the fifo-head to the next possible location.  If there
+            * are none, reset the indices.  This may be interrupted by the
+            * signal handler, doing essentially the same reset.
+            */
+           sp->_sysmouse_head += 1;
+           if (sp->_sysmouse_head == sp->_sysmouse_tail) {
+               sp->_sysmouse_tail = 0;
+               sp->_sysmouse_head = 0;
+           }
+
+           /* bump the next-free pointer into the circular list */
+           sp->_mouse_eventp = eventp = NEXT(eventp);
+           result = TRUE;
        }
-       return TRUE;
+       break;
+#endif /* USE_SYSMOUSE */
+
+    case M_NONE:
+       break;
     }
-#endif /* USE_EMX_MOUSE */
 
-    /* xterm: never have to query, mouse events are in the keyboard stream */
-    return (FALSE);            /* no event waiting */
+    return result;             /* true if we found an event */
 }
 
 static bool
-_nc_mouse_inline(SCREEN * sp)
+_nc_mouse_inline(SCREEN *sp)
 /* mouse report received in the keyboard stream -- parse its info */
 {
+    int b;
+    bool result = FALSE;
+    MEVENT *eventp = sp->_mouse_eventp;
+
     TR(MY_TRACE, ("_nc_mouse_inline() called"));
 
-    if (mousetype == M_XTERM) {
+    if (sp->_mouse_type == M_XTERM) {
        unsigned char kbuf[4];
-       MEVENT *prev;
+       mmask_t prev;
        size_t grabbed;
        int res;
 
@@ -432,13 +795,15 @@ _nc_mouse_inline(SCREEN * sp)
         * (End quote)  By the time we get here, we've eaten the
         * key prefix.  FYI, the loop below is necessary because
         * mouse click info isn't guaranteed to present as a
-        * single clist item.  It always does under Linux but often
-        * fails to under Solaris.
+        * single clist item.
+        *
+        * Wheel mice may return buttons 4 and 5 when the wheel is turned.
+        * We encode those as button presses.
         */
-       for (grabbed = 0; grabbed < 3; grabbed += res) {
+       for (grabbed = 0; grabbed < 3; grabbed += (size_t) res) {
 
            /* For VIO mouse we add extra bit 64 to disambiguate button-up. */
-#ifdef USE_EMX_MOUSE
+#if USE_EMX_MOUSE
            res = read(M_FD(sp) >= 0 ? M_FD(sp) : sp->_ifd, &kbuf, 3);
 #else
            res = read(sp->_ifd, kbuf + grabbed, 3 - grabbed);
@@ -451,59 +816,71 @@ _nc_mouse_inline(SCREEN * sp)
        TR(TRACE_IEVENT,
           ("_nc_mouse_inline sees the following xterm data: '%s'", kbuf));
 
-       eventp->id = 0;         /* there's only one mouse... */
+       /* there's only one mouse... */
+       eventp->id = NORMAL_EVENT;
 
        /* processing code goes here */
        eventp->bstate = 0;
+       prev = PREV(eventp)->bstate;
+
+#if USE_EMX_MOUSE
+#define PRESS_POSITION(n) \
+       eventp->bstate = MASK_PRESS(n); \
+       if (kbuf[0] & 0x40) \
+           eventp->bstate = MASK_RELEASE(n)
+#else
+#define PRESS_POSITION(n) \
+       eventp->bstate = (mmask_t) (prev & MASK_PRESS(n) \
+                                   ? REPORT_MOUSE_POSITION \
+                                   : MASK_PRESS(n))
+#endif
+
        switch (kbuf[0] & 0x3) {
        case 0x0:
-           eventp->bstate = BUTTON1_PRESSED;
-#ifdef USE_EMX_MOUSE
-           if (kbuf[0] & 0x40)
-               eventp->bstate = BUTTON1_RELEASED;
-#endif
+           if (kbuf[0] & 64)
+               eventp->bstate = MASK_PRESS(4);
+           else
+               PRESS_POSITION(1);
            break;
 
        case 0x1:
-           eventp->bstate = BUTTON2_PRESSED;
-#ifdef USE_EMX_MOUSE
-           if (kbuf[0] & 0x40)
-               eventp->bstate = BUTTON2_RELEASED;
+#if NCURSES_MOUSE_VERSION == 2
+           if (kbuf[0] & 64)
+               eventp->bstate = MASK_PRESS(5);
+           else
 #endif
+               PRESS_POSITION(2);
            break;
 
        case 0x2:
-           eventp->bstate = BUTTON3_PRESSED;
-#ifdef USE_EMX_MOUSE
-           if (kbuf[0] & 0x40)
-               eventp->bstate = BUTTON3_RELEASED;
-#endif
+           PRESS_POSITION(3);
            break;
 
        case 0x3:
            /*
-            * Release events aren't reported for individual buttons,
-            * just for the button set as a whole...
+            * Release events aren't reported for individual buttons, just for
+            * the button set as a whole.  However, because there are normally
+            * no mouse events under xterm that intervene between press and
+            * release, we can infer the button actually released by looking at
+            * the previous event.
             */
-           eventp->bstate =
-               (BUTTON1_RELEASED |
-                BUTTON2_RELEASED |
-                BUTTON3_RELEASED);
-           /*
-            * ...however, because there are no kinds of mouse events under
-            * xterm that can intervene between press and release, we can
-            * deduce which buttons were actually released by looking at the
-            * previous event.
-            */
-           prev = PREV(eventp);
-           if (!(prev->bstate & BUTTON1_PRESSED))
-               eventp->bstate &= ~BUTTON1_RELEASED;
-           if (!(prev->bstate & BUTTON2_PRESSED))
-               eventp->bstate &= ~BUTTON2_RELEASED;
-           if (!(prev->bstate & BUTTON3_PRESSED))
-               eventp->bstate &= ~BUTTON3_RELEASED;
+           if (prev & (BUTTON_PRESSED | BUTTON_RELEASED)) {
+               eventp->bstate = BUTTON_RELEASED;
+               for (b = 1; b <= MAX_BUTTONS; ++b) {
+                   if (!(prev & MASK_PRESS(b)))
+                       eventp->bstate &= ~MASK_RELEASE(b);
+               }
+           } else {
+               /*
+                * XFree86 xterm will return a stream of release-events to
+                * let the application know where the mouse is going, if the
+                * private mode 1002 or 1003 is enabled.
+                */
+               eventp->bstate = REPORT_MOUSE_POSITION;
+           }
            break;
        }
+       result = (eventp->bstate & REPORT_MOUSE_POSITION) ? TRUE : FALSE;
 
        if (kbuf[0] & 4) {
            eventp->bstate |= BUTTON_SHIFT;
@@ -519,71 +896,83 @@ _nc_mouse_inline(SCREEN * sp)
        eventp->y = (kbuf[2] - ' ') - 1;
        TR(MY_TRACE,
           ("_nc_mouse_inline: primitive mouse-event %s has slot %ld",
-           _tracemouse(eventp),
-           (long) (eventp - events)));
+           _nc_tracemouse(sp, eventp),
+           (long) IndexEV(sp, eventp)));
 
        /* bump the next-free pointer into the circular list */
-       eventp = NEXT(eventp);
+       sp->_mouse_eventp = NEXT(eventp);
 #if 0                          /* this return would be needed for QNX's mods to lib_getch.c */
        return (TRUE);
 #endif
     }
 
-    return (FALSE);
+    return (result);
 }
 
 static void
-mouse_activate(bool on)
+mouse_activate(SCREEN *sp, bool on)
 {
-    if (!on && !initialized)
+    if (!on && !sp->_mouse_initialized)
        return;
 
-    _nc_mouse_init();
+    if (!_nc_mouse_init(sp))
+       return;
 
     if (on) {
 
-       switch (mousetype) {
+       switch (sp->_mouse_type) {
        case M_XTERM:
 #if NCURSES_EXT_FUNCS
            keyok(KEY_MOUSE, on);
 #endif
            TPUTS_TRACE("xterm mouse initialization");
-#ifdef USE_EMX_MOUSE
-           server_state(1);
-#else
-           putp("\033[?1000h");
-#endif
+           enable_xterm_mouse(sp, 1);
            break;
 #if USE_GPM_SUPPORT
        case M_GPM:
-           SP->_mouse_fd = gpm_fd;
+           if (enable_gpm_mouse(sp, TRUE)) {
+               sp->_mouse_fd = *(my_gpm_fd);
+               T(("GPM mouse_fd %d", sp->_mouse_fd));
+           }
            break;
 #endif
+#if USE_SYSMOUSE
+       case M_SYSMOUSE:
+           signal(SIGUSR2, handle_sysmouse);
+           sp->_mouse_active = TRUE;
+           break;
+#endif
+       case M_NONE:
+           return;
        }
        /* Make runtime binding to cut down on object size of applications that
         * do not use the mouse (e.g., 'clear').
         */
-       SP->_mouse_event = _nc_mouse_event;
-       SP->_mouse_inline = _nc_mouse_inline;
-       SP->_mouse_parse = _nc_mouse_parse;
-       SP->_mouse_resume = _nc_mouse_resume;
-       SP->_mouse_wrap = _nc_mouse_wrap;
-
+       sp->_mouse_event = _nc_mouse_event;
+       sp->_mouse_inline = _nc_mouse_inline;
+       sp->_mouse_parse = _nc_mouse_parse;
+       sp->_mouse_resume = _nc_mouse_resume;
+       sp->_mouse_wrap = _nc_mouse_wrap;
     } else {
 
-       switch (mousetype) {
+       switch (sp->_mouse_type) {
        case M_XTERM:
            TPUTS_TRACE("xterm mouse deinitialization");
-#ifdef USE_EMX_MOUSE
-           server_state(0);
-#else
-           putp("\033[?1000l");
-#endif
+           enable_xterm_mouse(sp, 0);
            break;
 #if USE_GPM_SUPPORT
        case M_GPM:
+           enable_gpm_mouse(sp, FALSE);
+           break;
+#endif
+#if USE_SYSMOUSE
+       case M_SYSMOUSE:
+           signal(SIGUSR2, SIG_IGN);
+           sp->_mouse_active = FALSE;
            break;
 #endif
+       case M_NONE:
+           return;
        }
     }
     _nc_flush();
@@ -596,11 +985,13 @@ mouse_activate(bool on)
  **************************************************************************/
 
 static bool
-_nc_mouse_parse(int runcount)
+_nc_mouse_parse(SCREEN *sp, int runcount)
 /* parse a run of atomic mouse events into a gesture */
 {
+    MEVENT *eventp = sp->_mouse_eventp;
     MEVENT *ep, *runp, *next, *prev = PREV(eventp);
     int n;
+    int b;
     bool merge;
 
     TR(MY_TRACE, ("_nc_mouse_parse(%d) called", runcount));
@@ -609,7 +1000,7 @@ _nc_mouse_parse(int runcount)
      * When we enter this routine, the event list next-free pointer
      * points just past a run of mouse events that we know were separated
      * in time by less than the critical click interval. The job of this
-     * routine is to collaps this run into a single higher-level event
+     * routine is to collapse this run into a single higher-level event
      * or gesture.
      *
      * We accomplish this in two passes.  The first pass merges press/release
@@ -629,10 +1020,10 @@ _nc_mouse_parse(int runcount)
     if (runcount == 1) {
        TR(MY_TRACE,
           ("_nc_mouse_parse: returning simple mouse event %s at slot %ld",
-           _tracemouse(prev),
-           (long) (prev - events)));
-       return (prev->id >= 0)
-           ? ((prev->bstate & eventmask) ? TRUE : FALSE)
+           _nc_tracemouse(sp, prev),
+           (long) IndexEV(sp, prev)));
+       return (prev->id >= NORMAL_EVENT)
+           ? ((prev->bstate & sp->_mouse_mask) ? TRUE : FALSE)
            : FALSE;
     }
 
@@ -643,12 +1034,12 @@ _nc_mouse_parse(int runcount)
     }
 
 #ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT) {
-       _trace_slot("before mouse press/release merge:");
+    if (USE_TRACEF(TRACE_IEVENT)) {
+       _trace_slot(sp, "before mouse press/release merge:");
        _tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-               (long) (runp - events),
-               (long) ((eventp - events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -656,32 +1047,27 @@ _nc_mouse_parse(int runcount)
     do {
        merge = FALSE;
        for (ep = runp; (next = NEXT(ep)) != eventp; ep = next) {
+
+#define MASK_CHANGED(x) (!(ep->bstate & MASK_PRESS(x)) \
+                     == !(next->bstate & MASK_RELEASE(x)))
+
            if (ep->x == next->x && ep->y == next->y
-               && (ep->bstate & (BUTTON1_PRESSED | BUTTON2_PRESSED | BUTTON3_PRESSED))
-               && (!(ep->bstate & BUTTON1_PRESSED)
-                   == !(next->bstate & BUTTON1_RELEASED))
-               && (!(ep->bstate & BUTTON2_PRESSED)
-                   == !(next->bstate & BUTTON2_RELEASED))
-               && (!(ep->bstate & BUTTON3_PRESSED)
-                   == !(next->bstate & BUTTON3_RELEASED))
+               && (ep->bstate & BUTTON_PRESSED)
+               && MASK_CHANGED(1)
+               && MASK_CHANGED(2)
+               && MASK_CHANGED(3)
+               && MASK_CHANGED(4)
+#if NCURSES_MOUSE_VERSION == 2
+               && MASK_CHANGED(5)
+#endif
                ) {
-               if ((eventmask & BUTTON1_CLICKED)
-                   && (ep->bstate & BUTTON1_PRESSED)) {
-                   ep->bstate &= ~BUTTON1_PRESSED;
-                   ep->bstate |= BUTTON1_CLICKED;
-                   merge = TRUE;
-               }
-               if ((eventmask & BUTTON2_CLICKED)
-                   && (ep->bstate & BUTTON2_PRESSED)) {
-                   ep->bstate &= ~BUTTON2_PRESSED;
-                   ep->bstate |= BUTTON2_CLICKED;
-                   merge = TRUE;
-               }
-               if ((eventmask & BUTTON3_CLICKED)
-                   && (ep->bstate & BUTTON3_PRESSED)) {
-                   ep->bstate &= ~BUTTON3_PRESSED;
-                   ep->bstate |= BUTTON3_CLICKED;
-                   merge = TRUE;
+               for (b = 1; b <= MAX_BUTTONS; ++b) {
+                   if ((sp->_mouse_mask & MASK_CLICK(b))
+                       && (ep->bstate & MASK_PRESS(b))) {
+                       ep->bstate &= ~MASK_PRESS(b);
+                       ep->bstate |= MASK_CLICK(b);
+                       merge = TRUE;
+                   }
                }
                if (merge)
                    next->id = INVALID_EVENT;
@@ -691,12 +1077,12 @@ _nc_mouse_parse(int runcount)
        (merge);
 
 #ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT) {
-       _trace_slot("before mouse click merge:");
+    if (USE_TRACEF(TRACE_IEVENT)) {
+       _trace_slot(sp, "before mouse click merge:");
        _tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-               (long) (runp - events),
-               (long) ((eventp - events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -729,56 +1115,30 @@ _nc_mouse_parse(int runcount)
                    continue;
 
                /* merge click events forward */
-               if ((ep->bstate &
-                    (BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED))
-                   && (follower->bstate &
-                       (BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED))) {
-                   if ((eventmask & BUTTON1_DOUBLE_CLICKED)
-                       && (follower->bstate & BUTTON1_CLICKED)) {
-                       follower->bstate &= ~BUTTON1_CLICKED;
-                       follower->bstate |= BUTTON1_DOUBLE_CLICKED;
-                       merge = TRUE;
-                   }
-                   if ((eventmask & BUTTON2_DOUBLE_CLICKED)
-                       && (follower->bstate & BUTTON2_CLICKED)) {
-                       follower->bstate &= ~BUTTON2_CLICKED;
-                       follower->bstate |= BUTTON2_DOUBLE_CLICKED;
-                       merge = TRUE;
-                   }
-                   if ((eventmask & BUTTON3_DOUBLE_CLICKED)
-                       && (follower->bstate & BUTTON3_CLICKED)) {
-                       follower->bstate &= ~BUTTON3_CLICKED;
-                       follower->bstate |= BUTTON3_DOUBLE_CLICKED;
-                       merge = TRUE;
+               if ((ep->bstate & BUTTON_CLICKED)
+                   && (follower->bstate & BUTTON_CLICKED)) {
+                   for (b = 1; b <= MAX_BUTTONS; ++b) {
+                       if ((sp->_mouse_mask & MASK_DOUBLE_CLICK(b))
+                           && (follower->bstate & MASK_CLICK(b))) {
+                           follower->bstate &= ~MASK_CLICK(b);
+                           follower->bstate |= MASK_DOUBLE_CLICK(b);
+                           merge = TRUE;
+                       }
                    }
                    if (merge)
                        ep->id = INVALID_EVENT;
                }
 
                /* merge double-click events forward */
-               if ((ep->bstate &
-                    (BUTTON1_DOUBLE_CLICKED
-                     | BUTTON2_DOUBLE_CLICKED
-                     | BUTTON3_DOUBLE_CLICKED))
-                   && (follower->bstate &
-                       (BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED))) {
-                   if ((eventmask & BUTTON1_TRIPLE_CLICKED)
-                       && (follower->bstate & BUTTON1_CLICKED)) {
-                       follower->bstate &= ~BUTTON1_CLICKED;
-                       follower->bstate |= BUTTON1_TRIPLE_CLICKED;
-                       merge = TRUE;
-                   }
-                   if ((eventmask & BUTTON2_TRIPLE_CLICKED)
-                       && (follower->bstate & BUTTON2_CLICKED)) {
-                       follower->bstate &= ~BUTTON2_CLICKED;
-                       follower->bstate |= BUTTON2_TRIPLE_CLICKED;
-                       merge = TRUE;
-                   }
-                   if ((eventmask & BUTTON3_TRIPLE_CLICKED)
-                       && (follower->bstate & BUTTON3_CLICKED)) {
-                       follower->bstate &= ~BUTTON3_CLICKED;
-                       follower->bstate |= BUTTON3_TRIPLE_CLICKED;
-                       merge = TRUE;
+               if ((ep->bstate & BUTTON_DOUBLE_CLICKED)
+                   && (follower->bstate & BUTTON_CLICKED)) {
+                   for (b = 1; b <= MAX_BUTTONS; ++b) {
+                       if ((sp->_mouse_mask & MASK_TRIPLE_CLICK(b))
+                           && (follower->bstate & MASK_CLICK(b))) {
+                           follower->bstate &= ~MASK_CLICK(b);
+                           follower->bstate |= MASK_TRIPLE_CLICK(b);
+                           merge = TRUE;
+                       }
                    }
                    if (merge)
                        ep->id = INVALID_EVENT;
@@ -788,12 +1148,12 @@ _nc_mouse_parse(int runcount)
        (merge);
 
 #ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT) {
-       _trace_slot("before mouse event queue compaction:");
+    if (USE_TRACEF(TRACE_IEVENT)) {
+       _trace_slot(sp, "before mouse event queue compaction:");
        _tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-               (long) (runp - events),
-               (long) ((eventp - events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -802,23 +1162,23 @@ _nc_mouse_parse(int runcount)
      * don't match the current event mask.
      */
     for (; runcount; prev = PREV(eventp), runcount--)
-       if (prev->id == INVALID_EVENT || !(prev->bstate & eventmask)) {
-           eventp = prev;
+       if (prev->id == INVALID_EVENT || !(prev->bstate & sp->_mouse_mask)) {
+           sp->_mouse_eventp = eventp = prev;
        }
 #ifdef TRACE
-    if (_nc_tracing & TRACE_IEVENT) {
-       _trace_slot("after mouse event queue compaction:");
+    if (USE_TRACEF(TRACE_IEVENT)) {
+       _trace_slot(sp, "after mouse event queue compaction:");
        _tracef("_nc_mouse_parse: run starts at %ld, ends at %ld, count %d",
-               (long) (runp - events),
-               (long) ((eventp - events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
     for (ep = runp; ep != eventp; ep = NEXT(ep))
        if (ep->id != INVALID_EVENT)
            TR(MY_TRACE,
               ("_nc_mouse_parse: returning composite mouse event %s at slot %ld",
-               _tracemouse(ep),
-               (long) (ep - events)));
+               _nc_tracemouse(sp, ep),
+               (long) IndexEV(sp, ep)));
 #endif /* TRACE */
 
     /* after all this, do we have a valid event? */
@@ -826,35 +1186,62 @@ _nc_mouse_parse(int runcount)
 }
 
 static void
-_nc_mouse_wrap(SCREEN * sp GCC_UNUSED)
+_nc_mouse_wrap(SCREEN *sp)
 /* release mouse -- called by endwin() before shellout/exit */
 {
     TR(MY_TRACE, ("_nc_mouse_wrap() called"));
 
-    switch (mousetype) {
+    switch (sp->_mouse_type) {
     case M_XTERM:
-       if (eventmask)
-           mouse_activate(FALSE);
+       if (sp->_mouse_mask)
+           mouse_activate(sp, FALSE);
        break;
 #if USE_GPM_SUPPORT
        /* GPM: pass all mouse events to next client */
     case M_GPM:
+       if (sp->_mouse_mask)
+           mouse_activate(sp, FALSE);
        break;
 #endif
+#if USE_SYSMOUSE
+    case M_SYSMOUSE:
+       mouse_activate(sp, FALSE);
+       break;
+#endif
+    case M_NONE:
+       break;
     }
 }
 
 static void
-_nc_mouse_resume(SCREEN * sp GCC_UNUSED)
+_nc_mouse_resume(SCREEN *sp)
 /* re-connect to mouse -- called by doupdate() after shellout */
 {
     TR(MY_TRACE, ("_nc_mouse_resume() called"));
 
-    /* xterm: re-enable reporting */
-    if (mousetype == M_XTERM && eventmask)
-       mouse_activate(TRUE);
+    switch (sp->_mouse_type) {
+    case M_XTERM:
+       /* xterm: re-enable reporting */
+       if (sp->_mouse_mask)
+           mouse_activate(sp, TRUE);
+       break;
+
+#if USE_GPM_SUPPORT
+    case M_GPM:
+       /* GPM: reclaim our event set */
+       if (sp->_mouse_mask)
+           mouse_activate(sp, TRUE);
+       break;
+#endif
 
-    /* GPM: reclaim our event set */
+#if USE_SYSMOUSE
+    case M_SYSMOUSE:
+       mouse_activate(sp, TRUE);
+       break;
+#endif
+    case M_NONE:
+       break;
+    }
 }
 
 /**************************************************************************
@@ -863,13 +1250,13 @@ _nc_mouse_resume(SCREEN * sp GCC_UNUSED)
  *
  **************************************************************************/
 
-NCURSES_EXPORT(int)
-getmouse(MEVENT * aevent)
-/* grab a copy of the current mouse event */
+static int
+_nc_getmouse(SCREEN *sp, MEVENT * aevent)
 {
     T((T_CALLED("getmouse(%p)"), aevent));
 
-    if (aevent && (mousetype != M_NONE)) {
+    if ((aevent != 0) && (sp != 0) && (sp->_mouse_type != M_NONE)) {
+       MEVENT *eventp = sp->_mouse_eventp;
        /* compute the current-event pointer */
        MEVENT *prev = PREV(eventp);
 
@@ -877,8 +1264,8 @@ getmouse(MEVENT * aevent)
        *aevent = *prev;
 
        TR(TRACE_IEVENT, ("getmouse: returning event %s from slot %ld",
-                         _tracemouse(prev),
-                         (long) (prev - events)));
+                         _nc_tracemouse(sp, prev),
+                         (long) IndexEV(sp, prev)));
 
        prev->id = INVALID_EVENT;       /* so the queue slot becomes free */
        returnCode(OK);
@@ -886,20 +1273,40 @@ getmouse(MEVENT * aevent)
     returnCode(ERR);
 }
 
+/* grab a copy of the current mouse event */
 NCURSES_EXPORT(int)
-ungetmouse(MEVENT * aevent)
-/* enqueue a synthesized mouse event to be seen by the next wgetch() */
+getmouse(MEVENT * aevent)
 {
+    return _nc_getmouse(SP, aevent);
+}
+
+static int
+_nc_ungetmouse(SCREEN *sp, MEVENT * aevent)
+{
+    int result = ERR;
+
     T((T_CALLED("ungetmouse(%p)"), aevent));
 
-    /* stick the given event in the next-free slot */
-    *eventp = *aevent;
+    if (aevent != 0 && sp != 0) {
+       MEVENT *eventp = sp->_mouse_eventp;
 
-    /* bump the next-free pointer into the circular list */
-    eventp = NEXT(eventp);
+       /* stick the given event in the next-free slot */
+       *eventp = *aevent;
 
-    /* push back the notification event on the keyboard queue */
-    returnCode(ungetch(KEY_MOUSE));
+       /* bump the next-free pointer into the circular list */
+       sp->_mouse_eventp = NEXT(eventp);
+
+       /* push back the notification event on the keyboard queue */
+       result = _nc_ungetch(sp, KEY_MOUSE);
+    }
+    returnCode(result);
+}
+
+/* enqueue a synthesized mouse event to be seen by the next wgetch() */
+NCURSES_EXPORT(int)
+ungetmouse(MEVENT * aevent)
+{
+    return _nc_ungetmouse(SP, aevent);
 }
 
 NCURSES_EXPORT(mmask_t)
@@ -908,30 +1315,32 @@ mousemask(mmask_t newmask, mmask_t * oldmask)
 {
     mmask_t result = 0;
 
-    T((T_CALLED("mousemask(%#lx,%p)"), newmask, oldmask));
-
-    if (oldmask)
-       *oldmask = eventmask;
-
-    if (!newmask && !initialized)
-       returnBits(0);
+    T((T_CALLED("mousemask(%#lx,%p)"), (unsigned long) newmask, oldmask));
 
-    _nc_mouse_init();
-    if (mousetype != M_NONE) {
-       eventmask = newmask &
-           (BUTTON_ALT | BUTTON_CTRL | BUTTON_SHIFT
-            | BUTTON1_PRESSED | BUTTON1_RELEASED | BUTTON1_CLICKED
-            | BUTTON1_DOUBLE_CLICKED | BUTTON1_TRIPLE_CLICKED
-            | BUTTON2_PRESSED | BUTTON2_RELEASED | BUTTON2_CLICKED
-            | BUTTON2_DOUBLE_CLICKED | BUTTON2_TRIPLE_CLICKED
-            | BUTTON3_PRESSED | BUTTON3_RELEASED | BUTTON3_CLICKED
-            | BUTTON3_DOUBLE_CLICKED | BUTTON3_TRIPLE_CLICKED);
-
-       mouse_activate(eventmask != 0);
-
-       result = eventmask;
+    if (SP != 0) {
+       if (oldmask)
+           *oldmask = SP->_mouse_mask;
+
+       if (newmask || SP->_mouse_initialized) {
+           _nc_mouse_init(SP);
+           if (SP->_mouse_type != M_NONE) {
+               result = newmask &
+                   (REPORT_MOUSE_POSITION
+                    | BUTTON_ALT
+                    | BUTTON_CTRL
+                    | BUTTON_SHIFT
+                    | BUTTON_PRESSED
+                    | BUTTON_RELEASED
+                    | BUTTON_CLICKED
+                    | BUTTON_DOUBLE_CLICKED
+                    | BUTTON_TRIPLE_CLICKED);
+
+               mouse_activate(SP, (bool) (result != 0));
+
+               SP->_mouse_mask = result;
+           }
+       }
     }
-
     returnBits(result);
 }
 
@@ -977,7 +1386,7 @@ mouseinterval(int maxclick)
 NCURSES_EXPORT(int)
 _nc_has_mouse(void)
 {
-    return (mousetype == M_NONE ? 0 : 1);
+    return (SP->_mouse_type == M_NONE ? 0 : 1);
 }
 
 NCURSES_EXPORT(bool)
@@ -1010,5 +1419,3 @@ wmouse_trafo(const WINDOW *win, int *pY, int *pX, bool to_screen)
     }
     returnBool(result);
 }
-
-/* lib_mouse.c ends here */