ncurses 5.6 - patch 20080830
[ncurses.git] / ncurses / base / lib_mouse.c
index f30232795be4b5d96274fb439e7c2abfe8f38d10..b6229cf4a8a7f2bf5bc88026989352d30385a813 100644 (file)
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2005,2006 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            *
@@ -79,7 +79,7 @@
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_mouse.c,v 1.85 2006/11/25 22:30:28 tom Exp $")
+MODULE_ID("$Id: lib_mouse.c,v 1.97 2008/08/16 18:55:01 tom Exp $")
 
 #include <term.h>
 #include <tic.h>
@@ -154,34 +154,43 @@ make an error
 
 #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 */
 
+#define FirstEV(sp)    ((sp)->_mouse_events)
+#define LastEV(sp)     ((sp)->_mouse_events + EV_MAX - 1)
+
 #undef  NEXT
-#define NEXT(ep)       ((ep == SP->_mouse_events + EV_MAX - 1) \
-                        ? SP->_mouse_events \
+#define NEXT(ep)       ((ep >= LastEV(sp)) \
+                        ? FirstEV(sp) \
                         : ep + 1)
 
 #undef  PREV
-#define PREV(ep)       ((ep == SP->_mouse_events) \
-                        ? SP->_mouse_events + EV_MAX - 1 \
+#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 = SP->_mouse_events; ep < SP->_mouse_events + EV_MAX; ep++)
+    for (ep = FirstEV(sp); ep <= LastEV(sp); ep++)
        _tracef("mouse event queue slot %ld = %s",
-               (long) (ep - SP->_mouse_events),
-               _tracemouse(ep));
+               (long) IndexEV(sp, ep),
+               _nc_tracemouse(sp, ep));
 }
 #endif
 
@@ -193,7 +202,7 @@ _trace_slot(const char *tag)
 #  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;
@@ -202,12 +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(SP->_emxmouse_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;
@@ -234,7 +244,7 @@ mouse_server(unsigned long ignored GCC_UNUSED)
                    sprintf(err, "Error reading mouse queue, rc=%lu.\r\n", rc);
                    break;
                }
-               if (!SP->_emxmouse_activated)
+               if (!sp->_emxmouse_activated)
                    goto finish;
 
                /*
@@ -246,13 +256,13 @@ mouse_server(unsigned long ignored GCC_UNUSED)
                 */
                if ((mouev.fs ^ oldstate) & MOUSE_BN1_DOWN)
                    write_event(mouev.fs & MOUSE_BN1_DOWN,
-                               SP->_emxmouse_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,
-                               SP->_emxmouse_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,
-                               SP->_emxmouse_buttons[2], mouev.col, mouev.row);
+                               sp->_emxmouse_buttons[2], mouev.col, mouev.row);
 
              finish:
                oldstate = mouev.fs;
@@ -271,81 +281,87 @@ mouse_server(unsigned long ignored GCC_UNUSED)
 
 #if USE_SYSMOUSE
 static void
-handle_sysmouse(int sig GCC_UNUSED)
+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;
+    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]);
+       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;
+       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)
+       if (sp->_sysmouse_new_buttons) {
+           if (sp->_sysmouse_new_buttons & 1)
                work->bstate |= BUTTON1_PRESSED;
-           if (SP->_sysmouse_new_buttons & 2)
+           if (sp->_sysmouse_new_buttons & 2)
                work->bstate |= BUTTON2_PRESSED;
-           if (SP->_sysmouse_new_buttons & 4)
+           if (sp->_sysmouse_new_buttons & 4)
                work->bstate |= BUTTON3_PRESSED;
        } else {
-           if (SP->_sysmouse_old_buttons & 1)
+           if (sp->_sysmouse_old_buttons & 1)
                work->bstate |= BUTTON1_RELEASED;
-           if (SP->_sysmouse_old_buttons & 2)
+           if (sp->_sysmouse_old_buttons & 2)
                work->bstate |= BUTTON2_RELEASED;
-           if (SP->_sysmouse_old_buttons & 4)
+           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);
+       ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse);
        the_mouse.operation = MOUSE_SHOW;
-       ioctl(SP->_mouse_fd, CONS_MOUSECTL, &the_mouse);
+       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;
+       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;
+       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(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%;";
+    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(int enable)
+enable_xterm_mouse(SCREEN *sp, int enable)
 {
 #if USE_EMX_MOUSE
-    SP->_emxmouse_activated = enable;
+    sp->_emxmouse_activated = enable;
 #else
-    putp(TPARM_1(SP->_mouse_xtermcap, enable));
+    putp(TPARM_1(sp->_mouse_xtermcap, enable));
 #endif
-    SP->_mouse_active = enable;
+    sp->_mouse_active = enable;
 }
 
 #if USE_GPM_SUPPORT
@@ -366,19 +382,19 @@ allow_gpm_mouse(void)
 }
 
 static bool
-enable_gpm_mouse(int enable)
+enable_gpm_mouse(SCREEN *sp, int enable)
 {
     bool result;
 
     T((T_CALLED("enable_gpm_mouse(%d)"), enable));
 
-    if (enable && !SP->_mouse_active) {
+    if (enable && !sp->_mouse_active) {
        /* GPM: initialize connection to gpm server */
-       SP->_mouse_gpm_connect.eventMask = GPM_DOWN | GPM_UP;
-       SP->_mouse_gpm_connect.defaultMask =
-           ~(SP->_mouse_gpm_connect.eventMask | GPM_HARD);
-       SP->_mouse_gpm_connect.minMod = 0;
-       SP->_mouse_gpm_connect.maxMod =
+       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)));
@@ -387,14 +403,14 @@ enable_gpm_mouse(int enable)
         * 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);
-       SP->_mouse_active = result;
+       result = (my_Gpm_Open(&sp->_mouse_gpm_connect, 0) >= 0);
+       sp->_mouse_active = result;
        T(("GPM open %s", result ? "succeeded" : "failed"));
     } else {
-       if (!enable && SP->_mouse_active) {
+       if (!enable && sp->_mouse_active) {
            /* GPM: close connection to gpm server */
            my_Gpm_Close();
-           SP->_mouse_active = FALSE;
+           sp->_mouse_active = FALSE;
            T(("GPM closed"));
        }
        result = FALSE;
@@ -403,17 +419,17 @@ enable_gpm_mouse(int enable)
 }
 #endif /* USE_GPM_SUPPORT */
 
+#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
     if (allow_gpm_mouse()) {
-       if (!SP->_mouse_gpm_loaded) {
+       if (!sp->_mouse_gpm_loaded) {
 #ifdef HAVE_LIBDL
            void *obj;
 
@@ -425,13 +441,13 @@ initialize_mousetype(void)
                    T(("GPM initialization failed: %s", dlerror()));
                    dlclose(obj);
                } else {
-                   SP->_mouse_gpm_found = TRUE;
+                   sp->_mouse_gpm_found = TRUE;
                }
            }
 #else /* !HAVE_LIBDL */
-           SP->_mouse_gpm_found = TRUE;
+           sp->_mouse_gpm_found = TRUE;
 #endif
-           SP->_mouse_gpm_loaded = TRUE;
+           sp->_mouse_gpm_loaded = TRUE;
        }
 
        /*
@@ -439,10 +455,10 @@ initialize_mousetype(void)
         * maintain our notion of whether the mouse connection is active
         * without testing the file-descriptor.
         */
-       if (SP->_mouse_gpm_found && enable_gpm_mouse(TRUE)) {
-           SP->_mouse_type = M_GPM;
-           SP->_mouse_fd = *(my_gpm_fd);
-           T(("GPM mouse_fd %d", SP->_mouse_fd));
+       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;
        }
     }
@@ -450,7 +466,7 @@ initialize_mousetype(void)
 
     /* OS/2 VIO */
 #if USE_EMX_MOUSE
-    if (!SP->_emxmouse_thread
+    if (!sp->_emxmouse_thread
        && strstr(cur_term->type.term_names, "xterm") == 0
        && key_mouse) {
        int handles[2];
@@ -461,32 +477,32 @@ initialize_mousetype(void)
        } else {
            int rc;
 
-           if (!SP->_emxmouse_buttons[0]) {
+           if (!sp->_emxmouse_buttons[0]) {
                char *s = getenv("MOUSE_BUTTONS_123");
 
-               SP->_emxmouse_buttons[0] = 1;
+               sp->_emxmouse_buttons[0] = 1;
                if (s && strlen(s) >= 3) {
-                   SP->_emxmouse_buttons[1] = s[0] - '0';
-                   SP->_emxmouse_buttons[2] = s[1] - '0';
-                   SP->_emxmouse_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;
+                   sp->_emxmouse_buttons[1] = 1;
+                   sp->_emxmouse_buttons[2] = 3;
+                   sp->_emxmouse_buttons[3] = 2;
                }
            }
-           SP->_emxmouse_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 *) &SP->_emxmouse_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);
            } else {
-               SP->_mouse_type = M_XTERM;
+               sp->_mouse_type = M_XTERM;
            }
            returnVoid;
        }
@@ -498,14 +514,14 @@ initialize_mousetype(void)
        struct mouse_info the_mouse;
        char *the_device = 0;
 
-       if (isatty(SP->_ifd))
-           the_device = ttyname(SP->_ifd);
+       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);
+       sp->_mouse_fd = open(the_device, O_RDWR);
 
-       if (SP->_mouse_fd >= 0) {
+       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
@@ -522,10 +538,10 @@ initialize_mousetype(void)
            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) {
+           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);
+               ioctl(sp->_mouse_fd, CONS_MOUSECTL, &the_mouse);
 
 #if defined(FBIO_MODEINFO) || defined(CONS_MODEINFO)   /* FreeBSD > 2.x */
                {
@@ -535,23 +551,23 @@ initialize_mousetype(void)
 #endif /* FBIO_GETMODE */
                    video_info_t the_video;
 
-                   if (ioctl(SP->_mouse_fd,
+                   if (ioctl(sp->_mouse_fd,
                              FBIO_GETMODE,
                              &the_video.vi_mode) != -1
-                       && ioctl(SP->_mouse_fd,
+                       && 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;
+                       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;
+               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;
            }
        }
@@ -562,37 +578,37 @@ initialize_mousetype(void)
     if (key_mouse != 0) {
        if (!strcmp(key_mouse, xterm_kmous)
            || strstr(cur_term->type.term_names, "xterm") != 0) {
-           init_xterm_mouse();
+           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);
-       init_xterm_mouse();
+       if (_nc_add_to_try(&(sp->_keytry), xterm_kmous, KEY_MOUSE) == OK)
+           init_xterm_mouse(sp);
     }
     returnVoid;
 }
 
 static bool
-_nc_mouse_init(void)
+_nc_mouse_init(SCREEN *sp)
 /* initialize the mouse */
 {
     bool result = FALSE;
     int i;
 
-    if (SP != 0) {
-       if (!SP->_mouse_initialized) {
-           SP->_mouse_initialized = TRUE;
+    if (sp != 0) {
+       if (!sp->_mouse_initialized) {
+           sp->_mouse_initialized = TRUE;
 
            TR(MY_TRACE, ("_nc_mouse_init() called"));
 
-           SP->_mouse_eventp = SP->_mouse_events;
+           sp->_mouse_eventp = FirstEV(sp);
            for (i = 0; i < EV_MAX; i++)
-               SP->_mouse_events[i].id = INVALID_EVENT;
+               sp->_mouse_events[i].id = INVALID_EVENT;
 
-           initialize_mousetype();
+           initialize_mousetype(sp);
 
-           T(("_nc_mouse_init() set mousetype to %d", SP->_mouse_type));
+           T(("_nc_mouse_init() set mousetype to %d", sp->_mouse_type));
        }
-       result = SP->_mouse_initialized;
+       result = sp->_mouse_initialized;
     }
     return result;
 }
@@ -604,12 +620,12 @@ _nc_mouse_init(void)
 static bool
 _nc_mouse_event(SCREEN *sp GCC_UNUSED)
 {
-    MEVENT *eventp = SP->_mouse_eventp;
+    MEVENT *eventp = sp->_mouse_eventp;
     bool result = FALSE;
 
     (void) eventp;
 
-    switch (SP->_mouse_type) {
+    switch (sp->_mouse_type) {
     case M_XTERM:
        /* xterm: never have to query, mouse events are in the keyboard stream */
 #if USE_EMX_MOUSE
@@ -666,7 +682,7 @@ _nc_mouse_event(SCREEN *sp GCC_UNUSED)
                eventp->z = 0;
 
                /* bump the next-free pointer into the circular list */
-               SP->_mouse_eventp = eventp = NEXT(eventp);
+               sp->_mouse_eventp = eventp = NEXT(eventp);
                result = TRUE;
            }
        }
@@ -675,22 +691,22 @@ _nc_mouse_event(SCREEN *sp GCC_UNUSED)
 
 #if USE_SYSMOUSE
     case M_SYSMOUSE:
-       if (SP->_sysmouse_head < SP->_sysmouse_tail) {
-           *eventp = SP->_sysmouse_fifo[SP->_sysmouse_head];
+       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;
+           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);
+           sp->_mouse_eventp = eventp = NEXT(eventp);
            result = TRUE;
        }
        break;
@@ -709,11 +725,11 @@ _nc_mouse_inline(SCREEN *sp)
 {
     int b;
     bool result = FALSE;
-    MEVENT *eventp = SP->_mouse_eventp;
+    MEVENT *eventp = sp->_mouse_eventp;
 
     TR(MY_TRACE, ("_nc_mouse_inline() called"));
 
-    if (SP->_mouse_type == M_XTERM) {
+    if (sp->_mouse_type == M_XTERM) {
        unsigned char kbuf[4];
        mmask_t prev;
        size_t grabbed;
@@ -751,7 +767,7 @@ _nc_mouse_inline(SCREEN *sp)
         * 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. */
 #if USE_EMX_MOUSE
@@ -781,9 +797,9 @@ _nc_mouse_inline(SCREEN *sp)
            eventp->bstate = MASK_RELEASE(n)
 #else
 #define PRESS_POSITION(n) \
-       eventp->bstate = (prev & MASK_PRESS(n) \
-                       ? REPORT_MOUSE_POSITION \
-                       : MASK_PRESS(n))
+       eventp->bstate = (mmask_t) (prev & MASK_PRESS(n) \
+                                   ? REPORT_MOUSE_POSITION \
+                                   : MASK_PRESS(n))
 #endif
 
        switch (kbuf[0] & 0x3) {
@@ -847,11 +863,11 @@ _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 - SP->_mouse_events)));
+           _nc_tracemouse(sp, eventp),
+           (long) IndexEV(sp, eventp)));
 
        /* bump the next-free pointer into the circular list */
-       SP->_mouse_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
@@ -861,36 +877,36 @@ _nc_mouse_inline(SCREEN *sp)
 }
 
 static void
-mouse_activate(bool on)
+mouse_activate(SCREEN *sp, bool on)
 {
-    if (!on && !SP->_mouse_initialized)
+    if (!on && !sp->_mouse_initialized)
        return;
 
-    if (!_nc_mouse_init())
+    if (!_nc_mouse_init(sp))
        return;
 
     if (on) {
 
-       switch (SP->_mouse_type) {
+       switch (sp->_mouse_type) {
        case M_XTERM:
 #if NCURSES_EXT_FUNCS
            keyok(KEY_MOUSE, on);
 #endif
            TPUTS_TRACE("xterm mouse initialization");
-           enable_xterm_mouse(1);
+           enable_xterm_mouse(sp, 1);
            break;
 #if USE_GPM_SUPPORT
        case M_GPM:
-           if (enable_gpm_mouse(1)) {
-               SP->_mouse_fd = *(my_gpm_fd);
-               T(("GPM mouse_fd %d", SP->_mouse_fd));
+           if (enable_gpm_mouse(sp, 1)) {
+               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;
+           sp->_mouse_active = TRUE;
            break;
 #endif
        case M_NONE:
@@ -899,27 +915,27 @@ mouse_activate(bool on)
        /* 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 (SP->_mouse_type) {
+       switch (sp->_mouse_type) {
        case M_XTERM:
            TPUTS_TRACE("xterm mouse deinitialization");
-           enable_xterm_mouse(0);
+           enable_xterm_mouse(sp, 0);
            break;
 #if USE_GPM_SUPPORT
        case M_GPM:
-           enable_gpm_mouse(0);
+           enable_gpm_mouse(sp, 0);
            break;
 #endif
 #if USE_SYSMOUSE
        case M_SYSMOUSE:
            signal(SIGUSR2, SIG_IGN);
-           SP->_mouse_active = FALSE;
+           sp->_mouse_active = FALSE;
            break;
 #endif
        case M_NONE:
@@ -936,10 +952,10 @@ 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 *eventp = sp->_mouse_eventp;
     MEVENT *ep, *runp, *next, *prev = PREV(eventp);
     int n;
     int b;
@@ -971,10 +987,10 @@ _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 - SP->_mouse_events)));
+           _nc_tracemouse(sp, prev),
+           (long) IndexEV(sp, prev)));
        return (prev->id >= NORMAL_EVENT)
-           ? ((prev->bstate & SP->_mouse_mask) ? TRUE : FALSE)
+           ? ((prev->bstate & sp->_mouse_mask) ? TRUE : FALSE)
            : FALSE;
     }
 
@@ -985,12 +1001,12 @@ _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 - SP->_mouse_events),
-               (long) ((eventp - SP->_mouse_events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -1013,7 +1029,7 @@ _nc_mouse_parse(int runcount)
 #endif
                ) {
                for (b = 1; b <= MAX_BUTTONS; ++b) {
-                   if ((SP->_mouse_mask & MASK_CLICK(b))
+                   if ((sp->_mouse_mask & MASK_CLICK(b))
                        && (ep->bstate & MASK_PRESS(b))) {
                        ep->bstate &= ~MASK_PRESS(b);
                        ep->bstate |= MASK_CLICK(b);
@@ -1028,12 +1044,12 @@ _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 - SP->_mouse_events),
-               (long) ((eventp - SP->_mouse_events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -1069,7 +1085,7 @@ _nc_mouse_parse(int runcount)
                if ((ep->bstate & BUTTON_CLICKED)
                    && (follower->bstate & BUTTON_CLICKED)) {
                    for (b = 1; b <= MAX_BUTTONS; ++b) {
-                       if ((SP->_mouse_mask & MASK_DOUBLE_CLICK(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);
@@ -1084,7 +1100,7 @@ _nc_mouse_parse(int runcount)
                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))
+                       if ((sp->_mouse_mask & MASK_TRIPLE_CLICK(b))
                            && (follower->bstate & MASK_CLICK(b))) {
                            follower->bstate &= ~MASK_CLICK(b);
                            follower->bstate |= MASK_TRIPLE_CLICK(b);
@@ -1099,12 +1115,12 @@ _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 - SP->_mouse_events),
-               (long) ((eventp - SP->_mouse_events) + (EV_MAX - 1)) % EV_MAX,
+               RunParams(sp, eventp, runp),
                runcount);
+       _nc_unlock_global(tracef);
     }
 #endif /* TRACE */
 
@@ -1113,23 +1129,23 @@ _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 & SP->_mouse_mask)) {
-           SP->_mouse_eventp = 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 - SP->_mouse_events),
-               (long) ((eventp - SP->_mouse_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 - SP->_mouse_events)));
+               _nc_tracemouse(sp, ep),
+               (long) IndexEV(sp, ep)));
 #endif /* TRACE */
 
     /* after all this, do we have a valid event? */
@@ -1137,26 +1153,26 @@ _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 (SP->_mouse_type) {
+    switch (sp->_mouse_type) {
     case M_XTERM:
-       if (SP->_mouse_mask)
-           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(FALSE);
+       if (sp->_mouse_mask)
+           mouse_activate(sp, FALSE);
        break;
 #endif
 #if USE_SYSMOUSE
     case M_SYSMOUSE:
-       mouse_activate(FALSE);
+       mouse_activate(sp, FALSE);
        break;
 #endif
     case M_NONE:
@@ -1165,29 +1181,29 @@ _nc_mouse_wrap(SCREEN *sp GCC_UNUSED)
 }
 
 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"));
 
-    switch (SP->_mouse_type) {
+    switch (sp->_mouse_type) {
     case M_XTERM:
        /* xterm: re-enable reporting */
-       if (SP->_mouse_mask)
-           mouse_activate(TRUE);
+       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(TRUE);
+       if (sp->_mouse_mask)
+           mouse_activate(sp, TRUE);
        break;
 #endif
 
 #if USE_SYSMOUSE
     case M_SYSMOUSE:
-       mouse_activate(TRUE);
+       mouse_activate(sp, TRUE);
        break;
 #endif
     case M_NONE:
@@ -1201,14 +1217,13 @@ _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 != 0) && (SP != 0) && (SP->_mouse_type != M_NONE)) {
-       MEVENT *eventp = SP->_mouse_eventp;
+    if ((aevent != 0) && (sp != 0) && (sp->_mouse_type != M_NONE)) {
+       MEVENT *eventp = sp->_mouse_eventp;
        /* compute the current-event pointer */
        MEVENT *prev = PREV(eventp);
 
@@ -1216,8 +1231,8 @@ getmouse(MEVENT * aevent)
        *aevent = *prev;
 
        TR(TRACE_IEVENT, ("getmouse: returning event %s from slot %ld",
-                         _tracemouse(prev),
-                         (long) (prev - SP->_mouse_events)));
+                         _nc_tracemouse(sp, prev),
+                         (long) IndexEV(sp, prev)));
 
        prev->id = INVALID_EVENT;       /* so the queue slot becomes free */
        returnCode(OK);
@@ -1225,29 +1240,42 @@ 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));
 
-    if (aevent != 0 && SP != 0) {
-       MEVENT *eventp = SP->_mouse_eventp;
+    if (aevent != 0 && sp != 0) {
+       MEVENT *eventp = sp->_mouse_eventp;
 
        /* stick the given event in the next-free slot */
        *eventp = *aevent;
 
        /* bump the next-free pointer into the circular list */
-       SP->_mouse_eventp = NEXT(eventp);
+       sp->_mouse_eventp = NEXT(eventp);
 
        /* push back the notification event on the keyboard queue */
-       result = ungetch(KEY_MOUSE);
+       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)
 mousemask(mmask_t newmask, mmask_t * oldmask)
 /* set the mouse event mask */
@@ -1261,7 +1289,7 @@ mousemask(mmask_t newmask, mmask_t * oldmask)
            *oldmask = SP->_mouse_mask;
 
        if (newmask || SP->_mouse_initialized) {
-           _nc_mouse_init();
+           _nc_mouse_init(SP);
            if (SP->_mouse_type != M_NONE) {
                result = newmask &
                    (REPORT_MOUSE_POSITION
@@ -1274,14 +1302,11 @@ mousemask(mmask_t newmask, mmask_t * oldmask)
                     | BUTTON_DOUBLE_CLICKED
                     | BUTTON_TRIPLE_CLICKED);
 
-               mouse_activate((bool) (result != 0));
+               mouse_activate(SP, (bool) (result != 0));
 
                SP->_mouse_mask = result;
            }
        }
-    } else {
-       if (oldmask)
-           *oldmask = SP->_mouse_mask;
     }
     returnBits(result);
 }