FinderSync extension - requestBadgeIdentifierForURL is never called

Question

I checked the template provided in Xcode to create the FinderSync extension. Everything works well, except for two things:

a) The requestBadgeIdentifierForURL method is never called by the system when checking the folder so that the icons are not set. What's going on here? I am right in believing that this method should be called when I, for example. move or scroll controlled folder in Finder? By the way, the startObservingDirectoryAtURL and endObservingDirectoryAtURL methods are invoked properly in this context.

#import "FinderSync.h"

@interface FinderSync ()

@property NSURL *myFolderURL;

@end

@implementation FinderSync

- (instancetype)init {
    self = [super init];

    NSLog(@"%s launched from %@ ; compiled at %s", __PRETTY_FUNCTION__, [[NSBundle mainBundle] bundlePath], __TIME__);

    // Set up the directory we are syncing.
    self.myFolderURL = [NSURL fileURLWithPath:@"/Users/hmaass/Downloads"];
    [FIFinderSyncController defaultController].directoryURLs = [NSSet setWithObject:self.myFolderURL];

    // Set up images for our badge identifiers. For demonstration purposes, this uses off-the-shelf images.
    [[FIFinderSyncController defaultController] setBadgeImage:[NSImage imageNamed: NSImageNameColorPanel] label:@"Status One" forBadgeIdentifier:@"One"];
    [[FIFinderSyncController defaultController] setBadgeImage:[NSImage imageNamed: NSImageNameCaution] label:@"Status Two" forBadgeIdentifier:@"Two"];

    return self;
}

#pragma mark - Primary Finder Sync protocol methods

- (void)beginObservingDirectoryAtURL:(NSURL *)url {
    // The user is now seeing the container contents.
    // If they see it in more than one view at a time, we're only told once.
    NSLog(@"beginObservingDirectoryAtURL:%@", url.filePathURL);
}


- (void)endObservingDirectoryAtURL:(NSURL *)url {
    // The user is no longer seeing the container contents.
    NSLog(@"endObservingDirectoryAtURL:%@", url.filePathURL);
}

- (void)requestBadgeIdentifierForURL:(NSURL *)url {
    NSLog(@"requestBadgeIdentifierForURL:%@", url.filePathURL);

    // For demonstration purposes, this picks one of our two badges, or no badge at all, based on the filename.
    NSInteger whichBadge = [url.filePathURL hash] % 3;
    NSString* badgeIdentifier = @[@"", @"One", @"Two"][whichBadge];
    [[FIFinderSyncController defaultController] setBadgeIdentifier:badgeIdentifier forURL:url];
}

#pragma mark - Menu and toolbar item support

- (NSString *)toolbarItemName {
    return @"testfifi";
}

- (NSString *)toolbarItemToolTip {
    return @"testfifi: Click the toolbar item for a menu.";
}

- (NSImage *)toolbarItemImage {
    return [NSImage imageNamed:NSImageNameCaution];
}

- (NSMenu *)menuForMenuKind:(FIMenuKind)whichMenu {
    // Produce a menu for the extension.
    NSMenu *menu = [[NSMenu alloc] initWithTitle:@""];
    [menu addItemWithTitle:@"Example Menu Item" action:@selector(sampleAction:) keyEquivalent:@""];

    return menu;
}

- (IBAction)sampleAction:(id)sender {
    NSURL* target = [[FIFinderSyncController defaultController] targetedURL];
    NSArray* items = [[FIFinderSyncController defaultController] selectedItemURLs];

    NSLog(@"sampleAction: menu item: %@, target = %@, items = ", [sender title], [target filePathURL]);
    [items enumerateObjectsUsingBlock: ^(id obj, NSUInteger idx, BOOL *stop) {
        NSLog(@"    %@", [obj filePathURL]);
    }];
}

@end

b) I get the following message in the Xcode log console when starting the template above:

2015-08-25 15: 33: 00.300 testfifi [855: 8134] (colorGridView) (NSApplication) (NSColorPickerGridView): setter instance 2015-08-25 15: 33: 00.300 testfifi [855: 8134] () (NSApplication) (NSColorPickerGridView): 2015-08-25 15: 33: 00.321 testfifi [855: 8134] - [FinderSync init] /Users/hmaass/Library/Developer/Xcode/DerivedData/testtest -egudnxkifjxirpbrjkohnatmjuro/Build/Products/Debug/testtest.app/Contents/PlugIns/testfifi.appex; 20:38:18

- ?

!

Answer 1

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, , Finder Sync "", , , Dropbox Finder. Finder Sync ( " " → " → Finder" ) .

, , Dropbox ( ) startObservingDirectoryAtURL , . , Apple API , , . , , Finder Sync , "".

Dropbox . Apple, Dropbox , . () , , - "" , , .

Answer 2

"" Finder Sync. , .

( , "" ).

public static void main(String[] args) throws Exception {
    String[] greedyFSProcessNames =
        new String[] { "com.getdropbox.dropbox.garcon" };

    List<String> disabledGreedyFSProcessNames = new ArrayList<>();

    for (String greedyFSProcessName : greedyFSProcessNames) {
        if (!_isFSProcessRunning(greedyFSProcessName)) {
            continue;
        }

        _enableFSProcess(greedyFSProcessName, false);

        disabledGreedyFSProcessNames.add(greedyFSProcessName);
    }

    _enableFSProcess("com.dejuknow.myfindersync", true);

    for (String disabledGreedyFSProcessName :
        disabledGreedyFSProcessNames) {

        _enableFSProcess(disabledGreedyFSProcessName, true);
    }
}

private static boolean _isFSProcessRunning(String processName)
    throws Exception {

    BufferedReader bufferedReader = null;

    try {
        Process process = Runtime.getRuntime().exec(
            "pluginkit -m -i" + processName);

        bufferedReader = new BufferedReader(
            new InputStreamReader(process.getInputStream()));

        String line = null;

        while ((line = bufferedReader.readLine()) != null) {
            if (line.startsWith("+")) {
                return true;
            }
            else {
                return false;
            }
        }
    }
    finally {
        if (bufferedReader != null) {
            bufferedReader.close();
        }
    }

    return false;
}

private static void _enableFSProcess(String processName, boolean enable)
    throws Exception {

    String electionArgument = null;

    if (enable) {
        electionArgument = "use";
    }
    else {
        electionArgument = "ignore";
    }

    String[] arguments = new String[] {
        "pluginkit", "-e", electionArgument, "-i", processName
    };

    while (_isFSProcessRunning(processName) != enable) {
        Process process = Runtime.getRuntime().exec(arguments);

        process.waitFor();

        Thread.sleep(100);
    }
}

Answer 3

In the folders that I know, Dropbox uses: ~ / Dropbox, ~ / Documents and ~ / Desktop. I also have a FinderSync application, and I can display icons in all of my folders except those. Fortunately, the context menu does not seem to conflict, both elements of the extension menu are displayed.