FilePickerOpenOptions returns empty results when filtering for applications

[evan-choi]

Describe the bug

When trying to use the file picker to select applications on macOS, the picker dialog opens properly but returns empty results after selection.

The issue occurs specifically when setting up FilePickerOpenOptions with the AppleUniformTypeIdentifiers filter com.apple.application.

To Reproduce

var appPickerOptions = new FilePickerOpenOptions
{
    Title = "Select Application",
    FileTypeFilter =
    [
        new FilePickerFileType("Application")
        {
            AppleUniformTypeIdentifiers = ["com.apple.application"]
        }
    ]
};

var results = await StorageProvider.OpenFilePickerAsync(appPickerOptions);
// results is EMPTY!!

Expected behavior

The file picker should return the selected application in the results collection
ex. /System/Applications/FindMy.app

Avalonia version

11.2.4

OS

macOS

Additional context

No response

[maxkatz6]

If you are picking .app "files" - these are folders/directories in fact. OpenFilePickerAsync should have directories filtered out by design.

[evan-choi]

If you are picking .app "files" - these are folders/directories in fact. OpenFilePickerAsync should have directories filtered out by design.

Thank you for the clarification. I understand that .app files are technically directories, but in this case, the intent is to select macOS application bundles, which are often represented as .app directories.

While it's true that OpenFilePickerAsync filters files by design, the issue arises because, in the context of macOS applications, selecting .app bundles should be allowed, as they are technically directories but also represent executable applications. If we are to follow the design intent of OpenFilePickerAsync, then perhaps it's worth reconsidering how applications are handled in this specific case.

Alternatively, if modifying FilePicker proves to be challenging, I would appreciate it if FolderPicker could support AppleUniformTypeIdentifiers as an option. This would allow the picker to properly handle the selection of applications without breaking the intended functionality of filtering out regular directories.

By adding this feature, it would make the file picker more flexible and better suited for macOS-specific needs, providing a better user experience when selecting applications.