/* 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. */ #include /* Don't change this: see comments in Imakefile. */ #include #include "dispatch.h" #include #include #include #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; }