[DSFQuickActionBar.ItemIdentifier] { return self.actions .filter { $0.userPresenting.localizedCaseInsensitiveContains(term) } .sorted(by: { a, b in a.userPresenting < b.userPresenting }) .map { $0.identifier } } // Get the row's view for the action with the specified identifier func quickActionBar(_: DSFQuickActionBar, viewForIdentifier identifier: DSFQuickActionBar.ItemIdentifier, searchTerm: String) -> NSView? { // Find the item with the specified item identifier guard let filter = self.actions.filter({ $0.identifier == identifier }).first else { fatalError() } return FilterRowView(filter) // FilterRowView() is a NSView-derived class } // Perform a task with the selected action func quickActionBar(_: DSFQuickActionBar, didSelectIdentifier identifier: DSFQuickActionBar.ItemIdentifier) { guard let filter = self.actions.filter({ $0.identifier == identifier }).first else { fatalError() } self.performAction(filter) // Do something with the selected filter } } ">

class QuickActions: DSFQuickActionBarContentSource {

   /// DATA

   struct Filter {
      let identifier = DSFQuickActionBar.ItemIdentifier()
      let name: String
      var userPresenting: String { return CIFilter.localizedName(forFilterName: self.name) ?? self.name }
      var description: String { return CIFilter.localizedDescription(forFilterName: self.name) ?? "" }
   }

   let AllFilters: [Filter] = {
      let filterNames = CIFilter.filterNames(inCategory: nil).sorted()
      return filterNames.map { name in Filter(name: name) }
   }()

   /// ACTIONS

   let quickActionBar = DSFQuickActionBar()

   func displayQuickActionBar() {
      self.quickActionBar.contentSource = self
      self.quickActionBar.presentOnMainScreen(
         placeholderText: "Quick Actions",
         width: 600
      )
   }
   
   /// CALLBACKS

   // Get all the identifiers for the actions that 'match' the term
   func quickActionBar(_: DSFQuickActionBar, identifiersForSearchTerm searchTerm: String) -> [DSFQuickActionBar.ItemIdentifier] {
      return self.actions
         .filter { $0.userPresenting.localizedCaseInsensitiveContains(term) }
         .sorted(by: { a, b in a.userPresenting < b.userPresenting })
         .map { $0.identifier }
   }

   // Get the row's view for the action with the specified identifier
   func quickActionBar(_: DSFQuickActionBar, viewForIdentifier identifier: DSFQuickActionBar.ItemIdentifier, searchTerm: String) -> NSView? {
      // Find the item with the specified item identifier
      guard let filter = self.actions.filter({ $0.identifier == identifier }).first else {
         fatalError()
      }
      return FilterRowView(filter)  // FilterRowView() is a NSView-derived class
   }

   // Perform a task with the selected action
   func quickActionBar(_: DSFQuickActionBar, didSelectIdentifier identifier: DSFQuickActionBar.ItemIdentifier) {
      guard let filter = self.actions.filter({ $0.identifier == identifier }).first else {
         fatalError()
      }
      self.performAction(filter) // Do something with the selected filter
   }
}

struct Filter {
   let identifier = DSFQuickActionBar.ItemIdentifier()
   let name: String
   var userPresenting: String { return CIFilter.localizedName(forFilterName: self.name) ?? self.name }
   var description: String { return CIFilter.localizedDescription(forFilterName: self.name) ?? "" }
}

let AllFilters: [Filter] = {
   let filterNames = CIFilter.filterNames(inCategory: nil).sorted()
   return filterNames.map { name in Filter(name: name) }
}()

struct ContentView: View {

   // Binding to update when the user selects a filter
   @State var selectedFilter: Filter?

   // A quick action bar that uses FilterViewCell to display each row in the results
   let quickActionBar = DSFQuickActionBar.SwiftUI<FilterRowCell>()

   var body: some View {
      Button("Show Quick Action Bar") {
         self.quickActionBar.present(
            placeholderText: "Search Core Image Filters",
            contentSource: CoreImageFiltersContentSource(selectedFilter: $selectedFilter)
         )
      }
   }
}

class CoreImageFiltersContentSource: DSFQuickActionBarSwiftUIContentSource {

   @Binding var selectedFilter: Filter?

   init(selectedFilter: Binding
    ?>) {
      
    self.
    _selectedFilter 
    = selectedFilter
   }

   
    func 
    identifiersForSearch(
    _ 
    searchTerm: 
    String) 
    -> [DSFQuickActionBar.ItemIdentifier] {
      
    if term.
    isEmpty { 
    return [] }
      
    return AllFilters
         .
    filter { 
    $0.
    userPresenting.
    localizedCaseInsensitiveContains(term) }
         .
    sorted(
    by: { a, b 
    in a.
    userPresenting 
    < b.
    userPresenting } )
         .
    prefix(
    100)
         .
    map { 
    $0.
    id }
   }

   
    func 
    viewForIdentifier<
    RowContent>(
    _ 
    identifier: DSFQuickActionBar.ItemIdentifier, 
    searchTerm: 
    String) 
    -> RowContent
    ? 
    where RowContent
    : 
    View {
      
    guard 
    let filter 
    = AllFilters.
    filter({ 
    $0.
    id 
    == identifier }).
    first 
    else {
         
    return 
    nil
      }
      
    return 
    FilterViewCell(
    filter: filter) 
    as? RowContent
   }

   
    func 
    didSelectIdentifier(
    _ 
    identifier: DSFQuickActionBar.ItemIdentifier) {
      
    guard 
    let filter 
    = AllFilters.
    filter({ 
    $0.
    id 
    == identifier }).
    first 
    else {
         
    return
      }
      selectedFilter 
    = filter
   }

   
    func 
    didCancel() {
      selectedFilter 
    = 
    nil
   }
}
   

struct FilterViewCell: View {
   let filter: Filter
   var body: some View {
      HStack {
         Image("filter-color").resizable()
            .frame(width: 42, height: 42)
         VStack(alignment: .leading) {
            Text(filter.userPresenting).font(.title)
            Text(filter.description).font(.callout).foregroundColor(.gray).italic()
         }
      }
   }
}