new file mode 100644
--- /dev/null
+++ b/src/gui_beval.c
@@ -0,0 +1,1268 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved	by Bram Moolenaar
+ *			Visual Workshop integration by Gordon Prieur
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_BEVAL) || defined(PROTO)
+
+/* on Win32 only gui_mch_get_beval_info is required */
+#if !defined(FEAT_GUI_W32) || defined(PROTO)
+
+#ifdef FEAT_GUI_GTK
+# include <gdk/gdkkeysyms.h>
+# include <gtk/gtk.h>
+#else
+# include <X11/keysym.h>
+# ifdef FEAT_GUI_MOTIF
+#  include <Xm/PushB.h>
+#  include <Xm/Separator.h>
+#  include <Xm/List.h>
+#  include <Xm/Label.h>
+#  include <Xm/AtomMgr.h>
+#  include <Xm/Protocols.h>
+# else
+   /* Assume Athena */
+#  include <X11/Shell.h>
+#  include <X11/Xaw/Label.h>
+# endif
+#endif
+
+#include "gui_beval.h"
+
+#ifndef FEAT_GUI_GTK
+extern Widget vimShell;
+
+/*
+ * Currently, we assume that there can be only one BalloonEval showing
+ * on-screen at any given moment.  This variable will hold the currently
+ * showing BalloonEval or NULL if none is showing.
+ */
+static BalloonEval *current_beval = NULL;
+#endif
+
+#ifdef FEAT_GUI_GTK
+static void addEventHandler __ARGS((GtkWidget *, BalloonEval *));
+static void removeEventHandler __ARGS((BalloonEval *));
+static gint target_event_cb __ARGS((GtkWidget *, GdkEvent *, gpointer));
+static gint mainwin_event_cb __ARGS((GtkWidget *, GdkEvent *, gpointer));
+static void pointer_event __ARGS((BalloonEval *, int, int, unsigned));
+static void key_event __ARGS((BalloonEval *, unsigned, int));
+static gint timeout_cb __ARGS((gpointer));
+static gint balloon_expose_event_cb __ARGS((GtkWidget *, GdkEventExpose *, gpointer));
+# ifndef HAVE_GTK2
+static void balloon_draw_cb __ARGS((GtkWidget *, GdkRectangle *, gpointer));
+# endif
+#else
+static void addEventHandler __ARGS((Widget, BalloonEval *));
+static void removeEventHandler __ARGS((BalloonEval *));
+static void pointerEventEH __ARGS((Widget, XtPointer, XEvent *, Boolean *));
+static void pointerEvent __ARGS((BalloonEval *, XEvent *));
+static void timerRoutine __ARGS((XtPointer, XtIntervalId *));
+#endif
+static void cancelBalloon __ARGS((BalloonEval *));
+static void requestBalloon __ARGS((BalloonEval *));
+static void drawBalloon __ARGS((BalloonEval *));
+static void undrawBalloon __ARGS((BalloonEval *beval));
+static void createBalloonEvalWindow __ARGS((BalloonEval *));
+
+
+
+/*
+ * Create a balloon-evaluation area for a Widget.
+ * There can be either a "mesg" for a fixed string or "mesgCB" to generate a
+ * message by calling this callback function.
+ * When "mesg" is not NULL it must remain valid for as long as the balloon is
+ * used.  It is not freed here.
+ * Returns a pointer to the resulting object (NULL when out of memory).
+ */
+    BalloonEval *
+gui_mch_create_beval_area(target, mesg, mesgCB, clientData)
+    void	*target;
+    char_u	*mesg;
+    void	(*mesgCB)__ARGS((BalloonEval *, int));
+    void	*clientData;
+{
+#ifndef FEAT_GUI_GTK
+    char	*display_name;	    /* get from gui.dpy */
+    int		screen_num;
+    char	*p;
+#endif
+    BalloonEval	*beval;
+
+    if (mesg != NULL && mesgCB != NULL)
+    {
+	EMSG(_("E232: Cannot create BalloonEval with both message and callback"));
+	return NULL;
+    }
+
+    beval = (BalloonEval *)alloc(sizeof(BalloonEval));
+    if (beval != NULL)
+    {
+#ifdef FEAT_GUI_GTK
+	beval->target = GTK_WIDGET(target);
+	beval->balloonShell = NULL;
+	beval->timerID = 0;
+#else
+	beval->target = (Widget)target;
+	beval->balloonShell = NULL;
+	beval->timerID = (XtIntervalId)NULL;
+	beval->appContext = XtWidgetToApplicationContext((Widget)target);
+#endif
+	beval->showState = ShS_NEUTRAL;
+	beval->x = 0;
+	beval->y = 0;
+	beval->msg = mesg;
+	beval->msgCB = mesgCB;
+	beval->clientData = clientData;
+
+	/*
+	 * Set up event handler which will keep its eyes on the pointer,
+	 * and when the pointer rests in a certain spot for a given time
+	 * interval, show the beval.
+	 */
+	addEventHandler(beval->target, beval);
+	createBalloonEvalWindow(beval);
+
+#ifndef FEAT_GUI_GTK
+	/*
+	 * Now create and save the screen width and height. Used in drawing.
+	 */
+	display_name = DisplayString(gui.dpy);
+	p = strrchr(display_name, '.');
+	if (p != NULL)
+	    screen_num = atoi(++p);
+	else
+	    screen_num = 0;
+	beval->screen_width = DisplayWidth(gui.dpy, screen_num);
+	beval->screen_height = DisplayHeight(gui.dpy, screen_num);
+#endif
+    }
+
+    return beval;
+}
+
+#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
+/*
+ * Destroy a ballon-eval and free its associated memory.
+ */
+    void
+gui_mch_destroy_beval_area(beval)
+    BalloonEval	*beval;
+{
+    cancelBalloon(beval);
+    removeEventHandler(beval);
+    /* Children will automatically be destroyed */
+# ifdef FEAT_GUI_GTK
+    gtk_widget_destroy(beval->balloonShell);
+# else
+    XtDestroyWidget(beval->balloonShell);
+# endif
+    vim_free(beval);
+}
+#endif
+
+    void
+gui_mch_enable_beval_area(beval)
+    BalloonEval	*beval;
+{
+    if (beval != NULL)
+	addEventHandler(beval->target, beval);
+}
+
+    void
+gui_mch_disable_beval_area(beval)
+    BalloonEval	*beval;
+{
+    if (beval != NULL)
+	removeEventHandler(beval);
+}
+
+#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
+/*
+ * This function returns the BalloonEval * associated with the currently
+ * displayed tooltip.  Returns NULL if there is no tooltip currently showing.
+ *
+ * Assumption: Only one tooltip can be shown at a time.
+ */
+    BalloonEval *
+gui_mch_currently_showing_beval()
+{
+    return current_beval;
+}
+#endif
+#endif /* !FEAT_GUI_W32 */
+
+#if defined(FEAT_SUN_WORKSHOP) || defined(FEAT_NETBEANS_INTG) || defined(PROTO)
+/*
+ * Get the text and position to be evaluated for "beval".
+ * When "usingNetbeans" is set the returned text is in allocated memory.
+ * Returns OK or FAIL.
+ */
+    int
+gui_mch_get_beval_info(beval, filename, line, text, idx)
+    BalloonEval	*beval;
+    char_u     **filename;
+    int		*line;
+    char_u     **text;
+    int		*idx;
+{
+    win_T	*wp;
+    int		row, col;
+    char_u	*lbuf;
+    linenr_T	lnum;
+
+    *text = NULL;
+    row = Y_2_ROW(beval->y);
+    col = X_2_COL(beval->x);
+    wp = mouse_find_win(&row, &col);
+    if (wp != NULL && row < wp->w_height && col < W_WIDTH(wp))
+    {
+	/* Found a window and the cursor is in the text.  Now find the line
+	 * number. */
+	if (!mouse_comp_pos(wp, &row, &col, &lnum))
+	{
+	    /* Not past end of the file. */
+	    lbuf = ml_get_buf(wp->w_buffer, lnum, FALSE);
+	    if (col <= win_linetabsize(wp, lbuf, (colnr_T)MAXCOL))
+	    {
+		/* Not past end of line. */
+# ifdef FEAT_NETBEANS_INTG
+		if (usingNetbeans)
+		{
+		    /* For Netbeans we get the relevant part of the line
+		     * instead of the whole line. */
+		    int		len;
+		    pos_T	*spos = NULL, *epos = NULL;
+
+		    if (VIsual_active)
+		    {
+			if (lt(VIsual, curwin->w_cursor))
+			{
+			    spos = &VIsual;
+			    epos = &curwin->w_cursor;
+			}
+			else
+			{
+			    spos = &curwin->w_cursor;
+			    epos = &VIsual;
+			}
+		    }
+
+		    col = vcol2col(wp, lnum, col) - 1;
+
+		    if (VIsual_active
+			    && wp->w_buffer == curwin->w_buffer
+			    && (lnum == spos->lnum
+				? col >= (int)spos->col
+				: lnum > spos->lnum)
+			    && (lnum == epos->lnum
+				? col <= (int)epos->col
+				: lnum < epos->lnum))
+		    {
+			/* Visual mode and pointing to the line with the
+			 * Visual selection: return selected text, with a
+			 * maximum of one line. */
+			if (spos->lnum != epos->lnum || spos->col == epos->col)
+			    return FAIL;
+
+			lbuf = ml_get_buf(curwin->w_buffer, VIsual.lnum, FALSE);
+			lbuf = vim_strnsave(lbuf + spos->col,
+				     epos->col - spos->col + (*p_sel != 'e'));
+			lnum = spos->lnum;
+			col = spos->col;
+		    }
+		    else
+		    {
+			/* Find the word under the cursor. */
+			++emsg_off;
+			len = find_ident_at_pos(wp, lnum, (colnr_T)col, &lbuf,
+					FIND_IDENT + FIND_STRING + FIND_EVAL);
+			--emsg_off;
+			if (len == 0)
+			    return FAIL;
+			lbuf = vim_strnsave(lbuf, len);
+		    }
+		}
+# endif
+		*filename = wp->w_buffer->b_ffname;
+		*line = (int)lnum;
+		*text = lbuf;
+		*idx = col;
+		beval->ts = wp->w_buffer->b_p_ts;
+		return OK;
+	    }
+	}
+    }
+
+    return FAIL;
+}
+
+# if !defined(FEAT_GUI_W32) || defined(PROTO)
+
+/*
+ * Show a balloon with "mesg".
+ */
+    void
+gui_mch_post_balloon(beval, mesg)
+    BalloonEval	*beval;
+    char_u	*mesg;
+{
+    beval->msg = mesg;
+    if (mesg != NULL)
+	drawBalloon(beval);
+    else
+	undrawBalloon(beval);
+}
+# endif /* FEAT_GUI_W32 */
+#endif /* FEAT_SUN_WORKSHOP || FEAT_NETBEANS_INTG || PROTO */
+
+#if !defined(FEAT_GUI_W32) || defined(PROTO)
+#if defined(FEAT_BEVAL_TIP) || defined(PROTO)
+/*
+ * Hide the given balloon.
+ */
+    void
+gui_mch_unpost_balloon(beval)
+    BalloonEval	*beval;
+{
+    undrawBalloon(beval);
+}
+#endif
+
+#ifdef FEAT_GUI_GTK
+/*
+ * We can unconditionally use ANSI-style prototypes here since
+ * GTK+ requires an ANSI C compiler anyway.
+ */
+    static void
+addEventHandler(GtkWidget *target, BalloonEval *beval)
+{
+    /*
+     * Connect to the generic "event" signal instead of the individual
+     * signals for each event type, because the former is emitted earlier.
+     * This allows us to catch events independently of the signal handlers
+     * in gui_gtk_x11.c.
+     */
+    /* Should use GTK_OBJECT() here, but that causes a lint warning... */
+    gtk_signal_connect((GtkObject*)(target), "event",
+		       GTK_SIGNAL_FUNC(target_event_cb),
+		       beval);
+    /*
+     * Nasty:  Key press events go to the main window thus the drawing area
+     * will never see them.  This means we have to connect to the main window
+     * as well in order to catch those events.
+     */
+    if (gtk_socket_id == 0 && gui.mainwin != NULL
+	    && gtk_widget_is_ancestor(target, gui.mainwin))
+    {
+	gtk_signal_connect((GtkObject*)(gui.mainwin), "event",
+			   GTK_SIGNAL_FUNC(mainwin_event_cb),
+			   beval);
+    }
+}
+
+    static void
+removeEventHandler(BalloonEval *beval)
+{
+    gtk_signal_disconnect_by_func((GtkObject*)(beval->target),
+				  GTK_SIGNAL_FUNC(target_event_cb),
+				  beval);
+
+    if (gtk_socket_id == 0 && gui.mainwin != NULL
+	    && gtk_widget_is_ancestor(beval->target, gui.mainwin))
+    {
+	gtk_signal_disconnect_by_func((GtkObject*)(gui.mainwin),
+				      GTK_SIGNAL_FUNC(mainwin_event_cb),
+				      beval);
+    }
+}
+
+    static gint
+target_event_cb(GtkWidget *widget, GdkEvent *event, gpointer data)
+{
+    BalloonEval *beval = (BalloonEval *)data;
+
+    switch (event->type)
+    {
+	case GDK_ENTER_NOTIFY:
+	    pointer_event(beval, (int)event->crossing.x,
+				 (int)event->crossing.y,
+				 event->crossing.state);
+	    break;
+	case GDK_MOTION_NOTIFY:
+	    if (event->motion.is_hint)
+	    {
+		int		x;
+		int		y;
+		GdkModifierType	state;
+		/*
+		 * GDK_POINTER_MOTION_HINT_MASK is set, thus we cannot obtain
+		 * the coordinates from the GdkEventMotion struct directly.
+		 */
+		gdk_window_get_pointer(widget->window, &x, &y, &state);
+		pointer_event(beval, x, y, (unsigned int)state);
+	    }
+	    else
+	    {
+		pointer_event(beval, (int)event->motion.x,
+				     (int)event->motion.y,
+				     event->motion.state);
+	    }
+	    break;
+	case GDK_LEAVE_NOTIFY:
+	    /*
+	     * Ignore LeaveNotify events that are not "normal".
+	     * Apparently we also get it when somebody else grabs focus.
+	     */
+	    if (event->crossing.mode == GDK_CROSSING_NORMAL)
+		cancelBalloon(beval);
+	    break;
+	case GDK_BUTTON_PRESS:
+# ifdef HAVE_GTK2
+	case GDK_SCROLL:
+# endif
+	    cancelBalloon(beval);
+	    break;
+	case GDK_KEY_PRESS:
+	    key_event(beval, event->key.keyval, TRUE);
+	    break;
+	case GDK_KEY_RELEASE:
+	    key_event(beval, event->key.keyval, FALSE);
+	    break;
+	default:
+	    break;
+    }
+
+    return FALSE; /* continue emission */
+}
+
+/*ARGSUSED*/
+    static gint
+mainwin_event_cb(GtkWidget *widget, GdkEvent *event, gpointer data)
+{
+    BalloonEval *beval = (BalloonEval *)data;
+
+    switch (event->type)
+    {
+	case GDK_KEY_PRESS:
+	    key_event(beval, event->key.keyval, TRUE);
+	    break;
+	case GDK_KEY_RELEASE:
+	    key_event(beval, event->key.keyval, FALSE);
+	    break;
+	default:
+	    break;
+    }
+
+    return FALSE; /* continue emission */
+}
+
+    static void
+pointer_event(BalloonEval *beval, int x, int y, unsigned state)
+{
+    int distance;
+
+    distance = ABS(x - beval->x) + ABS(y - beval->y);
+
+    if (distance > 4)
+    {
+	/*
+	 * Moved out of the balloon location: cancel it.
+	 * Remember button state
+	 */
+	beval->state = state;
+	cancelBalloon(beval);
+
+	/* Mouse buttons are pressed - no balloon now */
+	if (!(state & ((int)GDK_BUTTON1_MASK | (int)GDK_BUTTON2_MASK
+						    | (int)GDK_BUTTON3_MASK)))
+	{
+	    beval->x = x;
+	    beval->y = y;
+
+	    if (state & (int)GDK_MOD1_MASK)
+	    {
+		/*
+		 * Alt is pressed -- enter super-evaluate-mode,
+		 * where there is no time delay
+		 */
+		if (beval->msgCB != NULL)
+		{
+		    beval->showState = ShS_PENDING;
+		    (*beval->msgCB)(beval, state);
+		}
+	    }
+	    else
+	    {
+		beval->timerID = gtk_timeout_add((guint32)p_bdlay,
+						 &timeout_cb, beval);
+	    }
+	}
+    }
+}
+
+    static void
+key_event(BalloonEval *beval, unsigned keyval, int is_keypress)
+{
+    if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
+    {
+	switch (keyval)
+	{
+	    case GDK_Shift_L:
+	    case GDK_Shift_R:
+		beval->showState = ShS_UPDATE_PENDING;
+		(*beval->msgCB)(beval, (is_keypress)
+						   ? (int)GDK_SHIFT_MASK : 0);
+		break;
+	    case GDK_Control_L:
+	    case GDK_Control_R:
+		beval->showState = ShS_UPDATE_PENDING;
+		(*beval->msgCB)(beval, (is_keypress)
+						 ? (int)GDK_CONTROL_MASK : 0);
+		break;
+	    default:
+		cancelBalloon(beval);
+		break;
+	}
+    }
+    else
+	cancelBalloon(beval);
+}
+
+    static gint
+timeout_cb(gpointer data)
+{
+    BalloonEval *beval = (BalloonEval *)data;
+
+    beval->timerID = 0;
+    /*
+     * If the timer event happens then the mouse has stopped long enough for
+     * a request to be started. The request will only send to the debugger if
+     * there the mouse is pointing at real data.
+     */
+    requestBalloon(beval);
+
+    return FALSE; /* don't call me again */
+}
+
+/*ARGSUSED2*/
+    static gint
+balloon_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
+{
+    gtk_paint_flat_box(widget->style, widget->window,
+		       GTK_STATE_NORMAL, GTK_SHADOW_OUT,
+		       &event->area, widget, "tooltip",
+		       0, 0, -1, -1);
+
+    return FALSE; /* continue emission */
+}
+
+# ifndef HAVE_GTK2
+/*ARGSUSED2*/
+    static void
+balloon_draw_cb(GtkWidget *widget, GdkRectangle *area, gpointer data)
+{
+    GtkWidget	    *child;
+    GdkRectangle    child_area;
+
+    gtk_paint_flat_box(widget->style, widget->window,
+		       GTK_STATE_NORMAL, GTK_SHADOW_OUT,
+		       area, widget, "tooltip",
+		       0, 0, -1, -1);
+
+    child = GTK_BIN(widget)->child;
+
+    if (gtk_widget_intersect(child, area, &child_area))
+	gtk_widget_draw(child, &child_area);
+}
+# endif
+
+#else /* !FEAT_GUI_GTK */
+
+    static void
+addEventHandler(target, beval)
+    Widget	target;
+    BalloonEval	*beval;
+{
+    XtAddEventHandler(target,
+			PointerMotionMask | EnterWindowMask |
+			LeaveWindowMask | ButtonPressMask | KeyPressMask |
+			KeyReleaseMask,
+			False,
+			pointerEventEH, (XtPointer)beval);
+}
+
+    static void
+removeEventHandler(beval)
+    BalloonEval	*beval;
+{
+    XtRemoveEventHandler(beval->target,
+			PointerMotionMask | EnterWindowMask |
+			LeaveWindowMask | ButtonPressMask | KeyPressMask |
+			KeyReleaseMask,
+			False,
+			pointerEventEH, (XtPointer)beval);
+}
+
+
+/*
+ * The X event handler. All it does is call the real event handler.
+ */
+/*ARGSUSED*/
+    static void
+pointerEventEH(w, client_data, event, unused)
+    Widget	w;
+    XtPointer	client_data;
+    XEvent	*event;
+    Boolean	*unused;
+{
+    BalloonEval *beval = (BalloonEval *)client_data;
+    pointerEvent(beval, event);
+}
+
+
+/*
+ * The real event handler. Called by pointerEventEH() whenever an event we are
+ * interested in ocurrs.
+ */
+
+    static void
+pointerEvent(beval, event)
+    BalloonEval	*beval;
+    XEvent	*event;
+{
+    Position	distance;	    /* a measure of how much the ponter moved */
+    Position	delta;		    /* used to compute distance */
+
+    switch (event->type)
+    {
+	case EnterNotify:
+	case MotionNotify:
+	    delta = event->xmotion.x - beval->x;
+	    if (delta < 0)
+		delta = -delta;
+	    distance = delta;
+	    delta = event->xmotion.y - beval->y;
+	    if (delta < 0)
+		delta = -delta;
+	    distance += delta;
+	    if (distance > 4)
+	    {
+		/*
+		 * Moved out of the balloon location: cancel it.
+		 * Remember button state
+		 */
+		beval->state = event->xmotion.state;
+		if (beval->state & (Button1Mask|Button2Mask|Button3Mask))
+		{
+		    /* Mouse buttons are pressed - no balloon now */
+		    cancelBalloon(beval);
+		}
+		else if (beval->state & (Mod1Mask|Mod2Mask|Mod3Mask))
+		{
+		    /*
+		     * Alt is pressed -- enter super-evaluate-mode,
+		     * where there is no time delay
+		     */
+		    beval->x = event->xmotion.x;
+		    beval->y = event->xmotion.y;
+		    beval->x_root = event->xmotion.x_root;
+		    beval->y_root = event->xmotion.y_root;
+		    cancelBalloon(beval);
+		    if (beval->msgCB != NULL)
+		    {
+			beval->showState = ShS_PENDING;
+			(*beval->msgCB)(beval, beval->state);
+		    }
+		}
+		else
+		{
+		    beval->x = event->xmotion.x;
+		    beval->y = event->xmotion.y;
+		    beval->x_root = event->xmotion.x_root;
+		    beval->y_root = event->xmotion.y_root;
+		    cancelBalloon(beval);
+		    beval->timerID = XtAppAddTimeOut( beval->appContext,
+					(long_u)p_bdlay, timerRoutine, beval);
+		}
+	    }
+	    break;
+
+	/*
+	 * Motif and Athena version: Keystrokes will be caught by the
+	 * "textArea" widget, and handled in gui_x11_key_hit_cb().
+	 */
+	case KeyPress:
+	    if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
+	    {
+		Modifiers   modifier;
+		KeySym	    keysym;
+
+		XtTranslateKeycode(gui.dpy,
+				       event->xkey.keycode, event->xkey.state,
+				       &modifier, &keysym);
+		if (keysym == XK_Shift_L || keysym == XK_Shift_R)
+		{
+		    beval->showState = ShS_UPDATE_PENDING;
+		    (*beval->msgCB)(beval, ShiftMask);
+		}
+		else if (keysym == XK_Control_L || keysym == XK_Control_R)
+		{
+		    beval->showState = ShS_UPDATE_PENDING;
+		    (*beval->msgCB)(beval, ControlMask);
+		}
+		else
+		    cancelBalloon(beval);
+	    }
+	    else
+		cancelBalloon(beval);
+	    break;
+
+	case KeyRelease:
+	    if (beval->showState == ShS_SHOWING && beval->msgCB != NULL)
+	    {
+		Modifiers modifier;
+		KeySym keysym;
+
+		XtTranslateKeycode(gui.dpy, event->xkey.keycode,
+				event->xkey.state, &modifier, &keysym);
+		if ((keysym == XK_Shift_L) || (keysym == XK_Shift_R)) {
+		    beval->showState = ShS_UPDATE_PENDING;
+		    (*beval->msgCB)(beval, 0);
+		}
+		else if ((keysym == XK_Control_L) || (keysym == XK_Control_R))
+		{
+		    beval->showState = ShS_UPDATE_PENDING;
+		    (*beval->msgCB)(beval, 0);
+		}
+		else
+		    cancelBalloon(beval);
+	    }
+	    else
+		cancelBalloon(beval);
+	    break;
+
+	case LeaveNotify:
+		/* Ignore LeaveNotify events that are not "normal".
+		 * Apparently we also get it when somebody else grabs focus.
+		 * Happens for me every two seconds (some clipboard tool?) */
+		if (event->xcrossing.mode == NotifyNormal)
+		    cancelBalloon(beval);
+		break;
+
+	case ButtonPress:
+		cancelBalloon(beval);
+		break;
+
+	default:
+	    break;
+    }
+}
+
+/*ARGSUSED*/
+    static void
+timerRoutine(dx, id)
+    XtPointer	    dx;
+    XtIntervalId    *id;
+{
+    BalloonEval *beval = (BalloonEval *)dx;
+
+    beval->timerID = (XtIntervalId)NULL;
+
+    /*
+     * If the timer event happens then the mouse has stopped long enough for
+     * a request to be started. The request will only send to the debugger if
+     * there the mouse is pointing at real data.
+     */
+    requestBalloon(beval);
+}
+
+#endif /* !FEAT_GUI_GTK */
+
+    static void
+requestBalloon(beval)
+    BalloonEval	*beval;
+{
+    if (beval->showState != ShS_PENDING)
+    {
+	/* Determine the beval to display */
+	if (beval->msgCB != NULL)
+	{
+	    beval->showState = ShS_PENDING;
+	    (*beval->msgCB)(beval, beval->state);
+	}
+	else if (beval->msg != NULL)
+	    drawBalloon(beval);
+    }
+}
+
+#ifdef FEAT_GUI_GTK
+
+# ifdef HAVE_GTK2
+/*
+ * Convert the string to UTF-8 if 'encoding' is not "utf-8".
+ * Replace any non-printable characters and invalid bytes sequences with
+ * "^X" or "<xx>" escapes, and apply SpecialKey highlighting to them.
+ * TAB and NL are passed through unscathed.
+ */
+#  define IS_NONPRINTABLE(c) (((c) < 0x20 && (c) != TAB && (c) != NL) \
+			      || (c) == DEL)
+    static void
+set_printable_label_text(GtkLabel *label, char_u *msg)
+{
+    char_u	    *convbuf = NULL;
+    char_u	    *buf;
+    char_u	    *p;
+    char_u	    *pdest;
+    unsigned int    len;
+    int		    charlen;
+    int		    uc;
+    PangoAttrList   *attr_list;
+
+    /* Convert to UTF-8 if it isn't already */
+    if (output_conv.vc_type != CONV_NONE)
+    {
+	convbuf = string_convert(&output_conv, msg, NULL);
+	if (convbuf != NULL)
+	    msg = convbuf;
+    }
+
+    /* First let's see how much we need to allocate */
+    len = 0;
+    for (p = msg; *p != NUL; p += charlen)
+    {
+	if ((*p & 0x80) == 0)	/* be quick for ASCII */
+	{
+	    charlen = 1;
+	    len += IS_NONPRINTABLE(*p) ? 2 : 1;	/* nonprintable: ^X */
+	}
+	else
+	{
+	    charlen = utf_ptr2len_check(p);
+	    uc = utf_ptr2char(p);
+
+	    if (charlen != utf_char2len(uc))
+		charlen = 1; /* reject overlong sequences */
+
+	    if (charlen == 1 || uc < 0xa0)	/* illegal byte or    */
+		len += 4;			/* control char: <xx> */
+	    else if (!utf_printable(uc))
+		/* Note: we assume here that utf_printable() doesn't
+		 * care about characters outside the BMP. */
+		len += 6;			/* nonprintable: <xxxx> */
+	    else
+		len += charlen;
+	}
+    }
+
+    attr_list = pango_attr_list_new();
+    buf = alloc(len + 1);
+
+    /* Now go for the real work */
+    if (buf != NULL)
+    {
+	attrentry_T	*aep;
+	PangoAttribute	*attr;
+	guicolor_T	pixel;
+	GdkColor	color = { 0, 0, 0, 0 };
+
+	/* Look up the RGB values of the SpecialKey foreground color. */
+	aep = syn_gui_attr2entry(hl_attr(HLF_8));
+	pixel = (aep != NULL) ? aep->ae_u.gui.fg_color : INVALCOLOR;
+	if (pixel != INVALCOLOR)
+	    gdk_colormap_query_color(gtk_widget_get_colormap(gui.drawarea),
+				     (unsigned long)pixel, &color);
+
+	pdest = buf;
+	p = msg;
+	while (*p != NUL)
+	{
+	    /* Be quick for ASCII */
+	    if ((*p & 0x80) == 0 && !IS_NONPRINTABLE(*p))
+	    {
+		*pdest++ = *p++;
+	    }
+	    else
+	    {
+		charlen = utf_ptr2len_check(p);
+		uc = utf_ptr2char(p);
+
+		if (charlen != utf_char2len(uc))
+		    charlen = 1; /* reject overlong sequences */
+
+		if (charlen == 1 || uc < 0xa0 || !utf_printable(uc))
+		{
+		    int	outlen;
+
+		    /* Careful: we can't just use transchar_byte() here,
+		     * since 'encoding' is not necessarily set to "utf-8". */
+		    if (*p & 0x80 && charlen == 1)
+		    {
+			transchar_hex(pdest, *p);	/* <xx> */
+			outlen = 4;
+		    }
+		    else if (uc >= 0x80)
+		    {
+			/* Note: we assume here that utf_printable() doesn't
+			 * care about characters outside the BMP. */
+			transchar_hex(pdest, uc);	/* <xx> or <xxxx> */
+			outlen = (uc < 0x100) ? 4 : 6;
+		    }
+		    else
+		    {
+			transchar_nonprint(pdest, *p);	/* ^X */
+			outlen = 2;
+		    }
+		    if (pixel != INVALCOLOR)
+		    {
+			attr = pango_attr_foreground_new(
+				color.red, color.green, color.blue);
+			attr->start_index = pdest - buf;
+			attr->end_index   = pdest - buf + outlen;
+			pango_attr_list_insert(attr_list, attr);
+		    }
+		    pdest += outlen;
+		    p += charlen;
+		}
+		else
+		{
+		    do
+			*pdest++ = *p++;
+		    while (--charlen != 0);
+		}
+	    }
+	}
+	*pdest = NUL;
+    }
+
+    vim_free(convbuf);
+
+    gtk_label_set_text(label, (const char *)buf);
+    vim_free(buf);
+
+    gtk_label_set_attributes(label, attr_list);
+    pango_attr_list_unref(attr_list);
+}
+#  undef IS_NONPRINTABLE
+# endif /* HAVE_GTK2 */
+
+/*
+ * Draw a balloon.
+ */
+    static void
+drawBalloon(BalloonEval *beval)
+{
+    if (beval->msg != NULL)
+    {
+	GtkRequisition	requisition;
+	int		screen_w;
+	int		screen_h;
+	int		x;
+	int		y;
+	int		x_offset = EVAL_OFFSET_X;
+	int		y_offset = EVAL_OFFSET_Y;
+# ifdef HAVE_GTK2
+	PangoLayout	*layout;
+# endif
+# ifdef HAVE_GTK_MULTIHEAD
+	GdkScreen	*screen;
+
+	screen = gtk_widget_get_screen(beval->target);
+	gtk_window_set_screen(GTK_WINDOW(beval->balloonShell), screen);
+	screen_w = gdk_screen_get_width(screen);
+	screen_h = gdk_screen_get_height(screen);
+# else
+	screen_w = gdk_screen_width();
+	screen_h = gdk_screen_height();
+# endif
+	gtk_widget_ensure_style(beval->balloonShell);
+	gtk_widget_ensure_style(beval->balloonLabel);
+
+# ifdef HAVE_GTK2
+	set_printable_label_text(GTK_LABEL(beval->balloonLabel), beval->msg);
+	/*
+	 * Dirty trick:  Enable wrapping mode on the label's layout behind its
+	 * back.  This way GtkLabel won't try to constrain the wrap width to a
+	 * builtin maximum value of about 65 Latin characters.
+	 */
+	layout = gtk_label_get_layout(GTK_LABEL(beval->balloonLabel));
+#  ifdef PANGO_WRAP_WORD_CHAR
+	pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);
+#  else
+	pango_layout_set_wrap(layout, PANGO_WRAP_WORD);
+#  endif
+	pango_layout_set_width(layout,
+		/* try to come up with some reasonable width */
+		PANGO_SCALE * CLAMP(gui.num_cols * gui.char_width,
+				    screen_w / 2,
+				    MAX(20, screen_w - 20)));
+
+	/* Calculate the balloon's width and height. */
+	gtk_widget_size_request(beval->balloonShell, &requisition);
+# else
+	gtk_label_set_line_wrap(GTK_LABEL(beval->balloonLabel), FALSE);
+	gtk_label_set_text(GTK_LABEL(beval->balloonLabel),
+			   (const char *)beval->msg);
+
+	/* Calculate the balloon's width and height. */
+	gtk_widget_size_request(beval->balloonShell, &requisition);
+	/*
+	 * Unfortunately, the dirty trick used above to get around the builtin
+	 * maximum wrap width of GtkLabel doesn't work with GTK+ 1.  Thus if
+	 * and only if it's absolutely necessary to avoid drawing off-screen,
+	 * do enable wrapping now and recalculate the size request.
+	 */
+	if (requisition.width > screen_w)
+	{
+	    gtk_label_set_line_wrap(GTK_LABEL(beval->balloonLabel), TRUE);
+	    gtk_widget_size_request(beval->balloonShell, &requisition);
+	}
+# endif
+
+	/* Compute position of the balloon area */
+	gdk_window_get_origin(beval->target->window, &x, &y);
+	x += beval->x;
+	y += beval->y;
+
+	/* Get out of the way of the mouse pointer */
+	if (x + x_offset + requisition.width > screen_w)
+	    y_offset += 15;
+	if (y + y_offset + requisition.height > screen_h)
+	    y_offset = -requisition.height - EVAL_OFFSET_Y;
+
+	/* Sanitize values */
+	x = CLAMP(x + x_offset, 0, MAX(0, screen_w - requisition.width));
+	y = CLAMP(y + y_offset, 0, MAX(0, screen_h - requisition.height));
+
+	/* Show the balloon */
+	gtk_widget_set_uposition(beval->balloonShell, x, y);
+	gtk_widget_show(beval->balloonShell);
+
+	beval->showState = ShS_SHOWING;
+    }
+}
+
+/*
+ * Undraw a balloon.
+ */
+    static void
+undrawBalloon(BalloonEval *beval)
+{
+    if (beval->balloonShell != NULL)
+	gtk_widget_hide(beval->balloonShell);
+    beval->showState = ShS_NEUTRAL;
+}
+
+    static void
+cancelBalloon(BalloonEval *beval)
+{
+    if (beval->showState == ShS_SHOWING
+	    || beval->showState == ShS_UPDATE_PENDING)
+	undrawBalloon(beval);
+
+    if (beval->timerID != 0)
+    {
+	gtk_timeout_remove(beval->timerID);
+	beval->timerID = 0;
+    }
+    beval->showState = ShS_NEUTRAL;
+}
+
+    static void
+createBalloonEvalWindow(BalloonEval *beval)
+{
+    beval->balloonShell = gtk_window_new(GTK_WINDOW_POPUP);
+
+    gtk_widget_set_app_paintable(beval->balloonShell, TRUE);
+    gtk_window_set_policy(GTK_WINDOW(beval->balloonShell), FALSE, FALSE, TRUE);
+    gtk_widget_set_name(beval->balloonShell, "gtk-tooltips");
+    gtk_container_border_width(GTK_CONTAINER(beval->balloonShell), 4);
+
+    gtk_signal_connect((GtkObject*)(beval->balloonShell), "expose_event",
+		       GTK_SIGNAL_FUNC(balloon_expose_event_cb), NULL);
+# ifndef HAVE_GTK2
+    gtk_signal_connect((GtkObject*)(beval->balloonShell), "draw",
+		       GTK_SIGNAL_FUNC(balloon_draw_cb), NULL);
+# endif
+    beval->balloonLabel = gtk_label_new(NULL);
+
+    gtk_label_set_line_wrap(GTK_LABEL(beval->balloonLabel), FALSE);
+    gtk_label_set_justify(GTK_LABEL(beval->balloonLabel), GTK_JUSTIFY_LEFT);
+    gtk_misc_set_alignment(GTK_MISC(beval->balloonLabel), 0.5f, 0.5f);
+    gtk_widget_set_name(beval->balloonLabel, "vim-balloon-label");
+    gtk_widget_show(beval->balloonLabel);
+
+    gtk_container_add(GTK_CONTAINER(beval->balloonShell), beval->balloonLabel);
+}
+
+#else /* !FEAT_GUI_GTK */
+
+/*
+ * Draw a balloon.
+ */
+    static void
+drawBalloon(beval)
+    BalloonEval	*beval;
+{
+    Dimension	w;
+    Dimension	h;
+    Position tx;
+    Position ty;
+
+    if (beval->msg != NULL)
+    {
+	/* Show the Balloon */
+
+	/* Calculate the label's width and height */
+#ifdef FEAT_GUI_MOTIF
+	XmString s;
+
+	/* For the callback function we parse NL characters to create a
+	 * multi-line label.  This doesn't work for all languages, but
+	 * XmStringCreateLocalized() doesn't do multi-line labels... */
+	if (beval->msgCB != NULL)
+	    s = XmStringCreateLtoR((char *)beval->msg, XmFONTLIST_DEFAULT_TAG);
+	else
+	    s = XmStringCreateLocalized((char *)beval->msg);
+	{
+	    XmFontList fl;
+
+	    fl = gui_motif_fontset2fontlist(&gui.tooltip_fontset);
+	    if (fl != NULL)
+	    {
+		XmStringExtent(fl, s, &w, &h);
+		XmFontListFree(fl);
+	    }
+	}
+	w += gui.border_offset << 1;
+	h += gui.border_offset << 1;
+	XtVaSetValues(beval->balloonLabel, XmNlabelString, s, NULL);
+	XmStringFree(s);
+#else /* Athena */
+	/* Assume XtNinternational == True */
+	XFontSet	fset;
+	XFontSetExtents *ext;
+
+	XtVaGetValues(beval->balloonLabel, XtNfontSet, &fset, NULL);
+	ext = XExtentsOfFontSet(fset);
+	h = ext->max_ink_extent.height;
+	w = XmbTextEscapement(fset,
+			      (char *)beval->msg,
+			      (int)STRLEN(beval->msg));
+	w += gui.border_offset << 1;
+	h += gui.border_offset << 1;
+	XtVaSetValues(beval->balloonLabel, XtNlabel, beval->msg, NULL);
+#endif
+
+	/* Compute position of the balloon area */
+	tx = beval->x_root + EVAL_OFFSET_X;
+	ty = beval->y_root + EVAL_OFFSET_Y;
+	if ((tx + w) > beval->screen_width)
+	    tx = beval->screen_width - w;
+	if ((ty + h) > beval->screen_height)
+	    ty = beval->screen_height - h;
+#ifdef FEAT_GUI_MOTIF
+	XtVaSetValues(beval->balloonShell,
+		XmNx, tx,
+		XmNy, ty,
+		NULL);
+#else
+	/* Athena */
+	XtVaSetValues(beval->balloonShell,
+		XtNx, tx,
+		XtNy, ty,
+		NULL);
+#endif
+
+	XtPopup(beval->balloonShell, XtGrabNone);
+
+	beval->showState = ShS_SHOWING;
+
+	current_beval = beval;
+    }
+}
+
+/*
+ * Undraw a balloon.
+ */
+    static void
+undrawBalloon(beval)
+    BalloonEval *beval;
+{
+    if (beval->balloonShell != (Widget)0)
+	XtPopdown(beval->balloonShell);
+    beval->showState = ShS_NEUTRAL;
+
+    current_beval = NULL;
+}
+
+    static void
+cancelBalloon(beval)
+    BalloonEval	*beval;
+{
+    if (beval->showState == ShS_SHOWING
+	    || beval->showState == ShS_UPDATE_PENDING)
+	undrawBalloon(beval);
+
+    if (beval->timerID != (XtIntervalId)NULL)
+    {
+	XtRemoveTimeOut(beval->timerID);
+	beval->timerID = (XtIntervalId)NULL;
+    }
+    beval->showState = ShS_NEUTRAL;
+}
+
+
+    static void
+createBalloonEvalWindow(beval)
+    BalloonEval	*beval;
+{
+    Arg		args[12];
+    int		n;
+
+    n = 0;
+#ifdef FEAT_GUI_MOTIF
+    XtSetArg(args[n], XmNallowShellResize, True); n++;
+    beval->balloonShell = XtAppCreateShell("balloonEval", "BalloonEval",
+		    overrideShellWidgetClass, gui.dpy, args, n);
+#else
+    /* Athena */
+    XtSetArg(args[n], XtNallowShellResize, True); n++;
+    beval->balloonShell = XtAppCreateShell("balloonEval", "BalloonEval",
+		    overrideShellWidgetClass, gui.dpy, args, n);
+#endif
+
+    n = 0;
+#ifdef FEAT_GUI_MOTIF
+    {
+	XmFontList fl;
+
+	fl = gui_motif_fontset2fontlist(&gui.tooltip_fontset);
+	XtSetArg(args[n], XmNforeground, gui.tooltip_fg_pixel); n++;
+	XtSetArg(args[n], XmNbackground, gui.tooltip_bg_pixel); n++;
+	XtSetArg(args[n], XmNfontList, fl); n++;
+	XtSetArg(args[n], XmNalignment, XmALIGNMENT_BEGINNING); n++;
+	beval->balloonLabel = XtCreateManagedWidget("balloonLabel",
+			xmLabelWidgetClass, beval->balloonShell, args, n);
+    }
+#else /* FEAT_GUI_ATHENA */
+    XtSetArg(args[n], XtNforeground, gui.tooltip_fg_pixel); n++;
+    XtSetArg(args[n], XtNbackground, gui.tooltip_bg_pixel); n++;
+    XtSetArg(args[n], XtNinternational, True); n++;
+    XtSetArg(args[n], XtNfontSet, gui.tooltip_fontset); n++;
+    beval->balloonLabel = XtCreateManagedWidget("balloonLabel",
+		    labelWidgetClass, beval->balloonShell, args, n);
+#endif
+}
+
+#endif /* !FEAT_GUI_GTK */
+#endif /* !FEAT_GUI_W32 */
+
+#endif /* FEAT_BEVAL */