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Updated the path subscriber as Mountain Lion seemed to have deprecated and broke FNSubscribeByPath. The new update checks if you are on 10.5 or later and if you are it will use the new FileSystem Events.

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This commit is contained in:
James Coleman 2012-07-29 16:49:33 -05:00
parent 4cca0cf0ec
commit 0c07b8c44c
1 changed files with 67 additions and 11 deletions
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58
Classes/CocoaShare/MGMPathSubscriber.m
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@ -10,6 +10,7 @@
@interface MGMPathSubscriber (MGMPrivate)
- (void)subscriptionChanged:(FNSubscriptionRef)theSubscription;
- (void)subscriptionFSChanged:(ConstFSEventStreamRef)theSubscription;
- (void)sendNotificationForPath:(NSString *)thePath;
@end
@ -20,7 +21,16 @@ void MGMPathSubscriptionChange(FNMessage theMessage, OptionBits theFlags, void *
if (theMessage==kFNDirectoryModifiedMessage)
[(MGMPathSubscriber *)thePathSubscription subscriptionChanged:theSubscription];
else
NSLog(@"MGMPathSubscription: Received Unknown message: %d", (int)theMessage);
NSLog(@"MGMPathSubscription: Received Unknown message: %u", theMessage);
}
void MGMPathSubscriptionFSChange(ConstFSEventStreamRef streamRef, void *thePathSubscription, size_t numEvents, void *eventPaths, const FSEventStreamEventFlags eventFlags[], const FSEventStreamEventId eventIds[]) {
for (size_t i=0; i<numEvents; i++) {
if (eventFlags[i] & (kFSEventStreamEventFlagItemCreated | kFSEventStreamEventFlagItemRemoved | kFSEventStreamEventFlagItemRenamed)) {
[(MGMPathSubscriber *)thePathSubscription subscriptionFSChanged:streamRef];
break;
}
}
}
@implementation MGMPathSubscriber
@ -52,10 +62,36 @@ void MGMPathSubscriptionChange(FNMessage theMessage, OptionBits theFlags, void *
delegate = theDelegate;
}
- (int)OSMajorVersion {
SInt32 majorVersion;
if (Gestalt(gestaltSystemVersionMajor, &majorVersion)==noErr) {
return (int)majorVersion;
}
return -1;
}
- (int)OSMinorVersion {
SInt32 minorVersion;
if (Gestalt(gestaltSystemVersionMinor, &minorVersion)==noErr) {
return (int)minorVersion;
}
return -1;
}
- (void)addPath:(NSString *)thePath {
NSValue *value = [subscriptions objectForKey:thePath];
if (value!=nil)
return;
FSEventStreamContext context = {0, self, NULL, NULL, NULL};
if ([self OSMajorVersion]==10 && [self OSMinorVersion]>=5) {
FSEventStreamRef stream = FSEventStreamCreate(NULL, &MGMPathSubscriptionFSChange, &context, (CFArrayRef)[NSArray arrayWithObject:thePath], kFSEventStreamEventIdSinceNow, 0.5, kFSEventStreamCreateFlagNone);
if (stream==NULL) {
NSLog(@"MGMPathSubscription: Unable to subscribe to %@", thePath);
return;
}
FSEventStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
FSEventStreamStart(stream);
[subscriptions setObject:[NSValue valueWithPointer:stream] forKey:thePath];
} else {
FNSubscriptionRef subscription = NULL;
OSStatus error = FNSubscribeByPath((UInt8 *)[thePath fileSystemRepresentation], subscriptionUPP, self, kFNNotifyInBackground, &subscription);
if (error!=noErr) {
@ -64,13 +100,23 @@ void MGMPathSubscriptionChange(FNMessage theMessage, OptionBits theFlags, void *
}
[subscriptions setObject:[NSValue valueWithPointer:subscription] forKey:thePath];
}
}
- (void)removePath:(NSString *)thePath {
NSValue *value = [subscriptions objectForKey:thePath];
if (value!=nil) {
if ([self OSMajorVersion]==10 && [self OSMinorVersion]>=5) {
FSEventStreamRef stream = [value pointerValue];
FSEventStreamStop(stream);
FSEventStreamUnscheduleFromRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
FSEventStreamInvalidate(stream);
FSEventStreamRelease(stream);
[subscriptions removeObjectForKey:thePath];
} else {
FNUnsubscribe([value pointerValue]);
[subscriptions removeObjectForKey:thePath];
}
}
}
- (void)removeAllPaths {
NSArray *keys = [subscriptions allKeys];
for (int i=0; i<[keys count]; i++) {
@ -93,6 +139,16 @@ void MGMPathSubscriptionChange(FNMessage theMessage, OptionBits theFlags, void *
}
}
}
- (void)subscriptionFSChanged:(ConstFSEventStreamRef)theSubscription {
NSArray *keys = [subscriptions allKeysForObject:[NSValue valueWithPointer:theSubscription]];
if ([keys count]>=1) {
NSString *path = [keys objectAtIndex:0];
if (![notificationsSending containsObject:path]) {
[notificationsSending addObject:path];
[self performSelector:@selector(sendNotificationForPath:) withObject:path afterDelay:0.5];
}
}
}
- (void)sendNotificationForPath:(NSString *)thePath {
[[NSNotificationCenter defaultCenter] postNotificationName:MGMSubscribedPathChangedNotification object:thePath];
if ([delegate respondsToSelector:@selector(subscribedPathChanged:)]) [delegate subscribedPathChanged:thePath];