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168f431ba9
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1521 72102866-910b-0410-8b05-ffd578937521
135 lines
3.8 KiB
Objective-C
135 lines
3.8 KiB
Objective-C
/* Implementation of object for queuing Notification objects
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Copyright (C) 1996 Free Software Foundation, Inc.
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Written by: Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
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Created: March 1996
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This file is part of the GNUstep Base Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* The implementation for NotificationDispatcher. */
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#include <gnustep/base/preface.h>
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#include <gnustep/base/NotificationQueue.h>
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#include <gnustep/base/Notification.h>
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#include <gnustep/base/LinkedListNode.h>
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#include <gnustep/base/Array.h>
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#include <gnustep/base/Invocation.h>
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#include <Foundation/NSException.h>
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@implementation NotificationQueue
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/* This is the default initialzer. */
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- initWithNotificationDistributor: nd
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{
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[super init];
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_notification_distributor = nd;
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_asap_queue = [Queue new];
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_idle_queue = [Queue new];
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return self;
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}
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- init
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{
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return [self initWithNotificationDistributor:
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[NotificationDistributor defaultInstance]];
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}
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- (void) dequeueNotificationsMatching: notification
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coalesceMask: (unsigned)mask
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{
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/* Remove from the queues notifications that match NOTIFICATION, according
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the the MASK. */
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/* xxx This method should be made much more efficient. Currently, it
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could be a big bottleneck. */
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void remove_matching_from_queue (Queue *q)
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{
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int i;
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for (i = [q count] - 1; i >= 0; i--)
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{
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id n = [q objectAtIndex: i];
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/* If the aspects that need to match do match... */
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if (( !(mask & NSNotificationCoalescingOnName)
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|| [[notification name] isEqual: [n name]])
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&&
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( !(mask & NSNotificationCoalescingOnSender)
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|| [[notification object] isEqual: [n object]]))
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/* ...then remove it. */
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[q removeObjectAtIndex: i];
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}
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}
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remove_matching_from_queue (_asap_queue);
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remove_matching_from_queue (_idle_queue);
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}
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- (void) enqueueNotification: notification
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postingStyle: (NSPostingStyle)style
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coalesceMask: (unsigned)mask
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forModes: (id <ConstantCollecting>)modes
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{
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[self dequeueNotificationsMatching: notification
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coalesceMask: mask];
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switch (style)
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{
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case NSPostIdle:
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[_idle_queue enqueueObject: notification];
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break;
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case NSPostASAP:
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[_asap_queue enqueueObject: notification];
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break;
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case NSPostNow:
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if ([modes containsObject: [RunLoop mode]])
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[_notification_distributor postNotification: notification];
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else
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/* xxx This is the correct behavior? */
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[_asap_queue enqueueObject: notification];
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break;
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default:
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[self error: "Bad posting style."];
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}
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}
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- (void) enqueueNotification: notification
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postingStyle: (NSPostingStyle)style
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{
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[self enqueueNotification: notification
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postingStyle: style
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coalesceMask: (NSNotificationCoalescingOnName
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| NSNotificationCoalescingOnSender)
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modes: nil];
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}
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- (void) postNotificationsWithASAPStyle
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{
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id n;
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int i, c = [_asap_queue count];
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for (i = 0; i < c; i++)
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[_notification_dispatcher postNotification:
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[_idle_queue objectAtIndex: i]];
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[_asap_queue empty];
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}
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- (void) postNotificationWithIdleStyle
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{
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id n = [_idle_queue dequeueObject];
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[_notification_dispatcher postNotification: n];
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}
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@end
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