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-rw-r--r--lwlib/dispatch.c275
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diff --git a/lwlib/dispatch.c b/lwlib/dispatch.c
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--- a/lwlib/dispatch.c
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-/* Defines a function to find the Widget that XtDispatchEvent() would use.
- Copyright (C) 1992 Lucid, Inc.
-
-This file is part of the Lucid Widget Library.
-
-The Lucid Widget Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
-any later version.
-
-The Lucid Widget Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/*
- * The function XtWidgetToDispatchTo(), given an XEvent, returns the
- * widget that XtDispatchEvent() would send that event to if called now.
- * This file copies much code from the X11r4 Xt source, and is thus a
- * portability problem. It also requires data structures defined in
- * IntrinsicI.h, which is a non-exported Xt header file, so you can't
- * compile this file unless you have the Xt sources online.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <IntrinsicI.h> /* Don't change this: see comments in Imakefile. */
-#include <X11/Xatom.h>
-#include "dispatch.h"
-
-#include <X11/Xlib.h>
-#include <X11/cursorfont.h>
-#include <X11/Xutil.h>
-
-#ifdef XlibSpecificationRelease
-#if XlibSpecificationRelease >= 5
-#define HAVE_X11R5
-#endif
-#endif
-
-/* ## All of the code on this page was copied from the X11R5 lib/Xt/Event.c,
- ## but is compatible with X11R4; the code in Event.c is different, but
- ## functionally equivalent for our purposes.
- */
-
-#if __STDC__
-#define Const const
-#else
-#define Const /**/
-#endif
-
-#define NonMaskableMask ((EventMask)0x80000000L)
-
-#define COMP_EXPOSE (widget->core.widget_class->core_class.compress_exposure)
-#define COMP_EXPOSE_TYPE (COMP_EXPOSE & 0x0f)
-#define GRAPHICS_EXPOSE ((XtExposeGraphicsExpose & COMP_EXPOSE) || \
- (XtExposeGraphicsExposeMerged & COMP_EXPOSE))
-#define NO_EXPOSE (XtExposeNoExpose & COMP_EXPOSE)
-
-
-/* -- lots of stuff we don't need to copy, omitted -- */
-
-
-static EventMask Const masks[] = {
- 0, /* Error, should never see */
- 0, /* Reply, should never see */
- KeyPressMask, /* KeyPress */
- KeyReleaseMask, /* KeyRelease */
- ButtonPressMask, /* ButtonPress */
- ButtonReleaseMask, /* ButtonRelease */
- PointerMotionMask /* MotionNotify */
- | ButtonMotionMask,
- EnterWindowMask, /* EnterNotify */
- LeaveWindowMask, /* LeaveNotify */
- FocusChangeMask, /* FocusIn */
- FocusChangeMask, /* FocusOut */
- KeymapStateMask, /* KeymapNotify */
- ExposureMask, /* Expose */
- NonMaskableMask, /* GraphicsExpose, in GC */
- NonMaskableMask, /* NoExpose, in GC */
- VisibilityChangeMask, /* VisibilityNotify */
- SubstructureNotifyMask, /* CreateNotify */
- StructureNotifyMask /* DestroyNotify */
- | SubstructureNotifyMask,
- StructureNotifyMask /* UnmapNotify */
- | SubstructureNotifyMask,
- StructureNotifyMask /* MapNotify */
- | SubstructureNotifyMask,
- SubstructureRedirectMask, /* MapRequest */
- StructureNotifyMask /* ReparentNotify */
- | SubstructureNotifyMask,
- StructureNotifyMask /* ConfigureNotify */
- | SubstructureNotifyMask,
- SubstructureRedirectMask, /* ConfigureRequest */
- StructureNotifyMask /* GravityNotify */
- | SubstructureNotifyMask,
- ResizeRedirectMask, /* ResizeRequest */
- StructureNotifyMask /* CirculateNotify */
- | SubstructureNotifyMask,
- SubstructureRedirectMask, /* CirculateRequest */
- PropertyChangeMask, /* PropertyNotify */
- NonMaskableMask, /* SelectionClear */
- NonMaskableMask, /* SelectionRequest */
- NonMaskableMask, /* SelectionNotify */
- ColormapChangeMask, /* ColormapNotify */
- NonMaskableMask, /* ClientMessage */
- NonMaskableMask /* MappingNotify */
-};
-
-#ifndef HAVE_X11R5
-
-static /* in R5, this is not static, so we don't need to define it at all */
-EventMask _XtConvertTypeToMask (eventType)
- int eventType;
-{
- eventType &= 0x7f; /* Events sent with XSendEvent have high bit set. */
- if (eventType < XtNumber(masks))
- return masks[eventType];
- else
- return 0;
-}
-
-#endif /* not HAVE_X11R5 */
-
-/* -- _XtOnGrabList() omitted -- */
-
-
-static Widget LookupSpringLoaded(grabList)
- XtGrabList grabList;
-{
- XtGrabList gl;
-
- for (gl = grabList; gl != NULL; gl = gl->next) {
- if (gl->spring_loaded)
- if (XtIsSensitive(gl->widget))
- return gl->widget;
- else
- return NULL;
- if (gl->exclusive) break;
- }
- return NULL;
-}
-
-
-
-/* This function is new. */
-
-static Boolean WouldDispatchEvent(event, widget, mask, pd)
- register XEvent *event;
- Widget widget;
- EventMask mask;
- XtPerDisplay pd;
-{
- XtEventRec *p;
- Boolean would_dispatched = False;
-
- if ((mask == ExposureMask) ||
- ((event->type == NoExpose) && NO_EXPOSE) ||
- ((event->type == GraphicsExpose) && GRAPHICS_EXPOSE) )
- if (widget->core.widget_class->core_class.expose != NULL )
- return True;
-
-
- if ((mask == VisibilityChangeMask) &&
- XtClass(widget)->core_class.visible_interest)
- return True;
-
- for (p=widget->core.event_table; p != NULL; p = p->next)
- if ((mask & p->mask) != 0
-#ifndef HAVE_X11R5
- || (mask == 0 && p->non_filter)
-#endif
- )
- return True;
-
- return False;
-}
-
-
-/* #### This function is mostly copied from DecideToDispatch().
- */
-
-typedef enum _GrabType {pass, ignore, remap} GrabType;
-
-Widget
-XtWidgetToDispatchTo (XEvent* event)
-{
- register Widget widget;
- EventMask mask;
- GrabType grabType;
- Widget dspWidget;
- Time time = 0;
- XtPerDisplay pd;
- XtPerDisplayInput pdi;
- XtGrabList grabList;
-
- widget = XtWindowToWidget (event->xany.display, event->xany.window);
- pd = _XtGetPerDisplay(event->xany.display);
- pdi = _XtGetPerDisplayInput(event->xany.display);
- grabList = *_XtGetGrabList(pdi);
-
- mask = _XtConvertTypeToMask(event->xany.type);
- grabType = pass;
- switch (event->xany.type & 0x7f) {
- case KeyPress:
- case KeyRelease: grabType = remap; break;
- case ButtonPress:
- case ButtonRelease: grabType = remap; break;
- case MotionNotify: grabType = ignore;
-#define XKnownButtons (Button1MotionMask|Button2MotionMask|Button3MotionMask|\
- Button4MotionMask|Button5MotionMask)
- mask |= (event->xmotion.state & XKnownButtons);
-#undef XKnownButtons
- break;
- case EnterNotify: grabType = ignore; break;
- }
-
- if (widget == NULL) {
- if (grabType != remap) return False;
- /* event occurred in a non-widget window, but we've promised also
- to dispatch it to the nearest accessible spring_loaded widget */
- else if ((widget = LookupSpringLoaded(grabList)) != NULL)
- return widget;
- return False;
- }
-
- switch(grabType) {
- case pass:
- return widget;
-
- case ignore:
- if ((grabList == NULL || _XtOnGrabList(widget,grabList))
- && XtIsSensitive(widget)) {
- return widget;
- }
- return NULL;
-
- case remap:
-
- {
- Widget was_dispatched_to= NULL;
- extern Widget _XtFindRemapWidget();
- extern void _XtUngrabBadGrabs();
-
- dspWidget = _XtFindRemapWidget(event, widget, mask, pdi);
-
- if ((grabList == NULL ||
- _XtOnGrabList(dspWidget, grabList)) &&
- XtIsSensitive(dspWidget)) {
- if (WouldDispatchEvent (event, dspWidget, mask, pd))
- was_dispatched_to = dspWidget;
- }
-
- /* Also dispatch to nearest accessible spring_loaded. */
- /* Fetch this afterward to reflect modal list changes */
- grabList = *_XtGetGrabList(pdi);
- widget = LookupSpringLoaded(grabList);
- if (widget != NULL && widget != dspWidget) {
- if (!was_dispatched_to)
- was_dispatched_to = widget;
- }
-
- return was_dispatched_to;
- }
- }
- /* should never reach here */
- return NULL;
-}
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