Dogcows Code - chaz/openbox/blob - otk/eventdispatcher.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "eventdispatcher.hh"
   6 #include "display.hh"
   7
   8 #include <cstdio>
   9 #include <iostream>
  10
  11 namespace otk {
  12
  13 EventDispatcher::EventDispatcher()
  14   : _fallback(0), _master(0)
  15 {
  16 }
  17
  18 EventDispatcher::~EventDispatcher()
  19 {
  20 }
  21
  22 void EventDispatcher::clearAllHandlers(void)
  23 {
  24   _map.clear();
  25 }
  26
  27 void EventDispatcher::registerHandler(Window id, EventHandler *handler)
  28 {
  29   _map.insert(std::pair<Window, EventHandler*>(id, handler));
  30 }
  31
  32 void EventDispatcher::clearHandler(Window id)
  33 {
  34   _map.erase(id);
  35 }
  36
  37 void EventDispatcher::dispatchEvents(bool remote)
  38 {
  39   XEvent e;
  40
  41   while (true) {
  42     /*
  43       There are slightly different event retrieval semantics here for local (or
  44       high bandwidth) versus remote (or low bandwidth) connections to the
  45       display/Xserver.
  46     */
  47     if (remote) {
  48       if (!XPending(**display))
  49         return;
  50     } else {
  51       /*
  52         This XSync allows for far more compression of events, which makes
  53         things like Motion events perform far far better. Since it also means
  54         network traffic for every event instead of every X events (where X is
  55         the number retrieved at a time), it probably should not be used for
  56         setups where Openbox is running on a remote/low bandwidth
  57         display/Xserver.
  58       */
  59       XSync(**display, false);
  60       if (!XEventsQueued(**display, QueuedAlready))
  61         return;
  62     }
  63     XNextEvent(**display, &e);
  64
  65 #if 0//defined(DEBUG)
  66     printf("Event %d window %lx\n", e.type, e.xany.window);
  67 #endif
  68
  69     if (e.type == FocusIn || e.type == FocusOut) {
  70       // focus events are a beast all their own.. yuk, hate, etc.
  71       dispatchFocus(e);
  72     } else {
  73       Window win;
  74
  75       // pick a window
  76       switch (e.type) {
  77       case UnmapNotify:
  78         win = e.xunmap.window;
  79         break;
  80       case DestroyNotify:
  81         win = e.xdestroywindow.window;
  82         break;
  83       case ConfigureRequest:
  84         win = e.xconfigurerequest.window;
  85         break;
  86       default:
  87         win = e.xany.window;
  88       }
  89
  90       // grab the lasttime and hack up the modifiers
  91       switch (e.type) {
  92       case ButtonPress:
  93       case ButtonRelease:
  94         _lasttime = e.xbutton.time;
  95         e.xbutton.state &= ~(LockMask | display->numLockMask() |
  96                              display->scrollLockMask());
  97         break;
  98       case KeyPress:
  99         e.xkey.state &= ~(LockMask | display->numLockMask() |
 100                           display->scrollLockMask());
 101         break;
 102       case MotionNotify:
 103         _lasttime = e.xmotion.time;
 104         e.xmotion.state &= ~(LockMask | display->numLockMask() |
 105                              display->scrollLockMask());
 106         break;
 107       case PropertyNotify:
 108         _lasttime = e.xproperty.time;
 109         break;
 110       case EnterNotify:
 111       case LeaveNotify:
 112         _lasttime = e.xcrossing.time;
 113         if (e.xcrossing.mode != NotifyNormal)
 114           continue; // skip me!
 115         break;
 116       }
 117
 118       dispatch(win, e);
 119     }
 120   }
 121 }
 122
 123 void EventDispatcher::dispatchFocus(const XEvent &e)
 124 {
 125 //  printf("focus %s detail %d -> 0x%lx\n",
 126 //         (e.xfocus.type == FocusIn ? "IN" : "OUT"),
 127 //         e.xfocus.detail, e.xfocus.window);
 128   // ignore focus changes from grabs
 129   if (e.xfocus.mode == NotifyGrab) //|| e.xfocus.mode == NotifyUngrab ||
 130       // From Metacity, from WindowMaker, ignore all funky pointer root events
 131       // its commented out cuz I don't think we need this at all. If problems
 132       // arise we can look into it
 133       //e.xfocus.detail > NotifyNonlinearVirtual)
 134     return;
 135
 136   if (e.type == FocusIn) {
 137     //printf("Got FocusIn!\n");
 138
 139     // send a FocusIn to whatever was just focused
 140     dispatch(e.xfocus.window, e);
 141     //printf("Sent FocusIn 0x%lx\n", e.xfocus.window);
 142
 143   } else if (e.type == FocusOut) {
 144     //printf("Got FocusOut!\n");
 145
 146     // FocusOut events just make us look for FocusIn events. They are ignored
 147     // otherwise.
 148     XEvent fi;
 149     if (XCheckTypedEvent(**display, FocusIn, &fi)) {
 150       //printf("Found FocusIn\n");
 151       dispatchFocus(fi);
 152       // dont unfocus the window we just focused!
 153       if (fi.xfocus.window == e.xfocus.window)
 154         return;
 155     }
 156
 157     dispatch(e.xfocus.window, e);
 158     //printf("Sent FocusOut 0x%lx\n", e.xfocus.window);
 159   }
 160 }
 161
 162 void EventDispatcher::dispatch(Window win, const XEvent &e)
 163 {
 164   EventHandler *handler = 0;
 165   EventMap::iterator it;
 166
 167   // master gets everything first
 168   if (_master)
 169     _master->handle(e);
 170
 171   // find handler for the chosen window
 172   it = _map.find(win);
 173
 174   if (it != _map.end()) {
 175     // if we found a handler
 176     handler = it->second;
 177   } else if (e.type == ConfigureRequest) {
 178     // unhandled configure requests must be used to configure the window
 179     // directly
 180     XWindowChanges xwc;
 181
 182     xwc.x = e.xconfigurerequest.x;
 183     xwc.y = e.xconfigurerequest.y;
 184     xwc.width = e.xconfigurerequest.width;
 185     xwc.height = e.xconfigurerequest.height;
 186     xwc.border_width = e.xconfigurerequest.border_width;
 187     xwc.sibling = e.xconfigurerequest.above;
 188     xwc.stack_mode = e.xconfigurerequest.detail;
 189
 190 #ifdef DEBUG
 191     printf("Proxying configure event for 0x%lx\n", e.xconfigurerequest.window);
 192 #endif
 193
 194     // we are not to be held responsible if someone sends us an invalid
 195     // request!
 196     display->setIgnoreErrors(true);
 197     XConfigureWindow(**display, e.xconfigurerequest.window,
 198                      e.xconfigurerequest.value_mask, &xwc);
 199     display->setIgnoreErrors(false);
 200   } else {
 201     // grab a falback if it exists
 202     handler = _fallback;
 203   }
 204
 205   if (handler)
 206     handler->handle(e);
 207 }
 208
 209 EventHandler *EventDispatcher::findHandler(Window win)
 210 {
 211   EventMap::iterator it = _map.find(win);
 212   if (it != _map.end())
 213     return it->second;
 214   return 0;
 215 }
 216
 217 }