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276 lines
8.0 KiB
C
276 lines
8.0 KiB
C
/* Defines a function to find the Widget that XtDispatchEvent() would use.
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Copyright (C) 1992 Lucid, Inc.
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This file is part of the Lucid Widget Library.
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The Lucid Widget Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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The Lucid Widget Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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* The function XtWidgetToDispatchTo(), given an XEvent, returns the
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* widget that XtDispatchEvent() would send that event to if called now.
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* This file copies much code from the X11r4 Xt source, and is thus a
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* portability problem. It also requires data structures defined in
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* IntrinsicI.h, which is a non-exported Xt header file, so you can't
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* compile this file unless you have the Xt sources online.
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*/
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#include <IntrinsicI.h> /* Don't change this: see comments in Imakefile. */
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#include <X11/Xatom.h>
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#include "dispatch.h"
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#ifdef THIS_IS_X11R4
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#ifdef THIS_IS_X11R5
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ERROR!! only one of THIS_IS_X11R4 or THIS_IS_X11R5 must be defined.
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#endif
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#else /* ! THIS_IS_X11R4 */
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#ifndef THIS_IS_X11R5
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ERROR!! one of THIS_IS_X11R4 or THIS_IS_X11R5 must be defined.
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#endif
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#endif /* ! THIS_IS_X11R4 */
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/* ## All of the code on this page was copied from the X11R5 lib/Xt/Event.c,
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## but is compatible with X11R4; the code in Event.c is different, but
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## functionally equivalent for our purposes.
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*/
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#if __STDC__
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#define Const const
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#else
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#define Const /**/
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#endif
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#define NonMaskableMask ((EventMask)0x80000000L)
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#define COMP_EXPOSE (widget->core.widget_class->core_class.compress_exposure)
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#define COMP_EXPOSE_TYPE (COMP_EXPOSE & 0x0f)
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#define GRAPHICS_EXPOSE ((XtExposeGraphicsExpose & COMP_EXPOSE) || \
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(XtExposeGraphicsExposeMerged & COMP_EXPOSE))
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#define NO_EXPOSE (XtExposeNoExpose & COMP_EXPOSE)
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/* -- lots of stuff we don't need to copy, omitted -- */
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static EventMask Const masks[] = {
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0, /* Error, should never see */
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0, /* Reply, should never see */
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KeyPressMask, /* KeyPress */
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KeyReleaseMask, /* KeyRelease */
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ButtonPressMask, /* ButtonPress */
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ButtonReleaseMask, /* ButtonRelease */
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PointerMotionMask /* MotionNotify */
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| ButtonMotionMask,
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EnterWindowMask, /* EnterNotify */
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LeaveWindowMask, /* LeaveNotify */
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FocusChangeMask, /* FocusIn */
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FocusChangeMask, /* FocusOut */
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KeymapStateMask, /* KeymapNotify */
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ExposureMask, /* Expose */
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NonMaskableMask, /* GraphicsExpose, in GC */
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NonMaskableMask, /* NoExpose, in GC */
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VisibilityChangeMask, /* VisibilityNotify */
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SubstructureNotifyMask, /* CreateNotify */
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StructureNotifyMask /* DestroyNotify */
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| SubstructureNotifyMask,
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StructureNotifyMask /* UnmapNotify */
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| SubstructureNotifyMask,
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StructureNotifyMask /* MapNotify */
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| SubstructureNotifyMask,
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SubstructureRedirectMask, /* MapRequest */
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StructureNotifyMask /* ReparentNotify */
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| SubstructureNotifyMask,
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StructureNotifyMask /* ConfigureNotify */
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| SubstructureNotifyMask,
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SubstructureRedirectMask, /* ConfigureRequest */
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StructureNotifyMask /* GravityNotify */
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| SubstructureNotifyMask,
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ResizeRedirectMask, /* ResizeRequest */
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StructureNotifyMask /* CirculateNotify */
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| SubstructureNotifyMask,
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SubstructureRedirectMask, /* CirculateRequest */
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PropertyChangeMask, /* PropertyNotify */
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NonMaskableMask, /* SelectionClear */
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NonMaskableMask, /* SelectionRequest */
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NonMaskableMask, /* SelectionNotify */
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ColormapChangeMask, /* ColormapNotify */
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NonMaskableMask, /* ClientMessage */
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NonMaskableMask /* MappingNotify */
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};
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#ifdef THIS_IS_X11R4
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static /* in R5, this is not static, so we don't need to define it at all */
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EventMask _XtConvertTypeToMask (eventType)
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int eventType;
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{
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eventType &= 0x7f; /* Events sent with XSendEvent have high bit set. */
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if (eventType < XtNumber(masks))
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return masks[eventType];
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else
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return 0;
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}
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#endif /* R4 */
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/* -- _XtOnGrabList() omitted -- */
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static Widget LookupSpringLoaded(grabList)
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XtGrabList grabList;
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{
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XtGrabList gl;
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for (gl = grabList; gl != NULL; gl = gl->next) {
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if (gl->spring_loaded)
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if (XtIsSensitive(gl->widget))
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return gl->widget;
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else
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return NULL;
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if (gl->exclusive) break;
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}
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return NULL;
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}
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/* This function is new. */
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static Boolean WouldDispatchEvent(event, widget, mask, pd)
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register XEvent *event;
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Widget widget;
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EventMask mask;
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XtPerDisplay pd;
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{
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XtEventRec *p;
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Boolean would_dispatched = False;
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if ((mask == ExposureMask) ||
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((event->type == NoExpose) && NO_EXPOSE) ||
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((event->type == GraphicsExpose) && GRAPHICS_EXPOSE) )
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if (widget->core.widget_class->core_class.expose != NULL )
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return True;
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if ((mask == VisibilityChangeMask) &&
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XtClass(widget)->core_class.visible_interest)
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return True;
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for (p=widget->core.event_table; p != NULL; p = p->next)
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if ((mask & p->mask) != 0
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#ifdef THIS_IS_X11R4
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|| (mask == 0 && p->non_filter)
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#endif
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)
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return True;
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return False;
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}
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/* #### This function is mostly copied from DecideToDispatch().
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*/
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typedef enum _GrabType {pass, ignore, remap} GrabType;
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Widget
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XtWidgetToDispatchTo (XEvent* event)
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{
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register Widget widget;
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EventMask mask;
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GrabType grabType;
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Widget dspWidget;
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Time time = 0;
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XtPerDisplay pd;
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XtPerDisplayInput pdi;
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XtGrabList grabList;
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widget = XtWindowToWidget (event->xany.display, event->xany.window);
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pd = _XtGetPerDisplay(event->xany.display);
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pdi = _XtGetPerDisplayInput(event->xany.display);
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grabList = *_XtGetGrabList(pdi);
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mask = _XtConvertTypeToMask(event->xany.type);
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grabType = pass;
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switch (event->xany.type & 0x7f) {
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case KeyPress:
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case KeyRelease: grabType = remap; break;
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case ButtonPress:
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case ButtonRelease: grabType = remap; break;
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case MotionNotify: grabType = ignore;
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#define XKnownButtons (Button1MotionMask|Button2MotionMask|Button3MotionMask|\
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Button4MotionMask|Button5MotionMask)
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mask |= (event->xmotion.state & XKnownButtons);
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#undef XKnownButtons
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break;
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case EnterNotify: grabType = ignore; break;
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}
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if (widget == NULL) {
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if (grabType != remap) return False;
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/* event occurred in a non-widget window, but we've promised also
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to dispatch it to the nearest accessible spring_loaded widget */
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else if ((widget = LookupSpringLoaded(grabList)) != NULL)
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return widget;
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return False;
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}
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switch(grabType) {
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case pass:
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return widget;
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case ignore:
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if ((grabList == NULL || _XtOnGrabList(widget,grabList))
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&& XtIsSensitive(widget)) {
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return widget;
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}
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return NULL;
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case remap:
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{
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Widget was_dispatched_to= NULL;
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extern Widget _XtFindRemapWidget();
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extern void _XtUngrabBadGrabs();
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dspWidget = _XtFindRemapWidget(event, widget, mask, pdi);
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if ((grabList == NULL ||
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_XtOnGrabList(dspWidget, grabList)) &&
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XtIsSensitive(dspWidget)) {
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if (WouldDispatchEvent (event, dspWidget, mask, pd))
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was_dispatched_to = dspWidget;
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}
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/* Also dispatch to nearest accessible spring_loaded. */
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/* Fetch this afterward to reflect modal list changes */
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grabList = *_XtGetGrabList(pdi);
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widget = LookupSpringLoaded(grabList);
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if (widget != NULL && widget != dspWidget) {
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if (!was_dispatched_to)
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was_dispatched_to = widget;
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}
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return was_dispatched_to;
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}
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}
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/* should never reach here */
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return NULL;
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}
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