src/mac/carbon/macnotfy.cpp

   1 /* -------------------------------------------------------------------------
   2  * Project: Mac Notifier Support
   3  * Name:    macnotfy.c
   4  * Author:  Stefan CSomor
   5  * Purpose: Mac Notifier main file
   6  * CVSID:   $Id$
   7  * -------------------------------------------------------------------------
   8  */
   9
  10 #include "wx/wx.h"
  11
  12 #include "wx/mac/private.h"
  13
  14 #include "wx/mac/macnotfy.h"
  15
  16 const short kMaxEvents = 1000 ;
  17
  18 struct wxMacNotificationEvents
  19 {
  20         short top ;
  21         short bottom ;
  22
  23         wxMacNotificationProcPtr proc[kMaxEvents] ;
  24         unsigned long events[kMaxEvents] ;
  25         void* data[kMaxEvents] ;
  26 } ;
  27
  28 typedef struct wxMacNotificationEvents wxMacNotificationEvents ;
  29 wxMacNotificationEvents gMacNotificationEvents ;
  30
  31 ProcessSerialNumber gAppProcess ;
  32
  33 void wxMacWakeUp()
  34 {
  35         ProcessSerialNumber psn ;
  36         Boolean isSame ;
  37         psn.highLongOfPSN = 0 ;
  38         psn.lowLongOfPSN = kCurrentProcess ;
  39         SameProcess( &gAppProcess , &psn , &isSame ) ;
  40         if ( isSame )
  41         {
  42                 PostEvent( nullEvent , 0 ) ;
  43         }
  44         else
  45         {
  46                 WakeUpProcess( &gAppProcess ) ;
  47         }
  48 }
  49
  50 void wxMacCreateNotifierTable()
  51 {
  52         GetCurrentProcess(&gAppProcess);
  53         gMacNotificationEvents.top = 0 ;
  54         gMacNotificationEvents.bottom = 0 ;
  55         for ( int i = 0 ; i < kMaxEvents ; ++i )
  56         {
  57                 gMacNotificationEvents.proc[i] = NULL ;
  58                 gMacNotificationEvents.events[i] = NULL ;
  59                 gMacNotificationEvents.data[i] = NULL ;
  60         }
  61 }
  62
  63 void wxMacDestroyNotifierTable()
  64 {
  65 }
  66
  67 wxMacNotifierTableRef wxMacGetNotifierTable()
  68 {
  69         return (wxMacNotifierTableRef) &gMacNotificationEvents ;
  70 }
  71
  72 void wxMacAddEvent(
  73         wxMacNotifierTableRef table ,
  74         wxMacNotificationProcPtr handler ,
  75         unsigned long event ,
  76         void* data ,
  77         short wakeUp )
  78 {
  79         wxMacNotificationEvents *e = (wxMacNotificationEvents *) table ;
  80         wxASSERT_MSG( handler != NULL , "illegal notification proc ptr" ) ;
  81         /* this should be protected eventually */
  82         short index = e->top++ ;
  83
  84         if ( e->top == kMaxEvents )
  85                 e->top = 0 ;
  86
  87         e->proc[index] = handler ;
  88         e->events[index] = event ;
  89         e->data[index] = data ;
  90         if ( wakeUp )
  91                 wxMacWakeUp() ;
  92 }
  93
  94 bool gInProcessing = false ;
  95
  96 void wxMacRemoveAllNotifiersForData( wxMacNotifierTableRef table , void* data )
  97 {
  98         wxMacNotificationEvents *e = (wxMacNotificationEvents *) table ;
  99         /* this should be protected eventually */
 100         short index = e->bottom ;
 101
 102   while ( e->top != index )
 103   {
 104     if ( index == kMaxEvents )
 105       index = 0 ;
 106     if ( e->data[index] == data )
 107         e->data[index] = NULL ;
 108         index++ ;
 109   }
 110 }
 111
 112 void wxMacProcessNotifierEvents()
 113 {
 114 //  if ( gInProcessing )
 115 //      return ;
 116
 117   gInProcessing = true ;
 118   if ( gMacNotificationEvents.top != gMacNotificationEvents.bottom )
 119   {
 120     // we only should process the notifiers that were here when we entered it
 121     // otherwise we might never get out...
 122         short count = gMacNotificationEvents.top - gMacNotificationEvents.bottom ;
 123         if ( count < 0 )
 124         count += kMaxEvents ;
 125
 126     while ( count-- )
 127     {
 128         // consume event at bottom
 129         short index = gMacNotificationEvents.bottom++ ;
 130         if ( gMacNotificationEvents.bottom == kMaxEvents )
 131           gMacNotificationEvents.bottom = 0 ;
 132         void* data = gMacNotificationEvents.data[index] ;
 133         unsigned long event = gMacNotificationEvents.events[index] ;
 134         wxMacNotificationProcPtr handler =  gMacNotificationEvents.proc[index] ;
 135
 136         gMacNotificationEvents.data[index] = NULL ;
 137         gMacNotificationEvents.events[index] = NULL ;
 138         gMacNotificationEvents.proc[index]  = NULL ;
 139
 140         if ( handler )
 141             handler( event , data  ) ;
 142         }
 143   }
 144   gInProcessing = false ;
 145 }
 146
 147 void wxMacProcessNotifierAndPendingEvents()
 148 {
 149         wxMacProcessNotifierEvents() ;
 150         wxTheApp->ProcessPendingEvents() ;
 151 }