WIP: show stack in collection rail

sources/clipbored/views/ClipboardPanelView.swift

@@ -56,6 +56,7 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
   private let collectionScrollView = NSScrollView()
   private let collectionStack = NSStackView()
   private let addCollectionButton = NSButton()
+  private let stackChip = CollectionChipView(title: "Stack", color: .systemGreen)
   private let itemsStack = NSStackView()
   private let scrollView = NSScrollView()
   private let statusLabel = NSTextField(labelWithString: "")
@@ -326,6 +327,7 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
     viewModel.onStackChanged = { [weak self] in
       self?.reloadItems()
       self?.updateSelection()
+      self?.configureCollectionButtons()
       self?.updateStatus(self?.viewModel.statusMessage ?? "")
     }
     viewModel.onCaptureStatusChanged = { [weak self] in
@@ -390,11 +392,22 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
       customCollectionButtons[collectionName] = chip
       collectionStack.addArrangedSubview(chip)
     }
+    configureStackChip()
     collectionStack.addArrangedSubview(addCollectionButton)
     updateAddCollectionButtonState()
     sizeCollectionDocument()
   }
 
+  private func configureStackChip() {
+    stackChip.toolTip = "Queued clips"
+    stackChip.onPress = { [weak self] in
+      self?.viewModel.selectStack()
+    }
+    if viewModel.stackCount > 0 {
+      collectionStack.addArrangedSubview(stackChip)
+    }
+  }
+
   private func configureAddCollectionButton() {
     let image = NSImage(systemSymbolName: "plus", accessibilityDescription: "New collection")
     image?.isTemplate = true
@@ -845,6 +858,8 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
       chip.setSelected(viewModel.selectedCollectionName == name)
       chip.setCount(viewModel.collectionCount(named: name))
     }
+    stackChip.setSelected(viewModel.isStackFilterSelected)
+    stackChip.setCount(viewModel.stackCount)
     sizeCollectionDocument()
   }
 
@@ -1028,7 +1043,10 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
   }
 
   var debugSelectedCollectionTitle: String? {
-    collectionButtons.first(where: { $0.value.isSelected })?.value.titleText
+    if stackChip.isSelected {
+      return stackChip.titleText
+    }
+    return collectionButtons.first(where: { $0.value.isSelected })?.value.titleText
   }
 
   var debugCollectionCounts: [Int] {
@@ -1045,6 +1063,23 @@ final class ClipboardPanelView: NSVisualEffectView, NSSearchFieldDelegate {
     return viewModel.collectionNames.compactMap { customCollectionButtons[$0]?.count }
   }
 
+  var debugStackChipIsVisible: Bool {
+    collectionStack.arrangedSubviews.contains(stackChip)
+  }
+
+  var debugStackChipCount: Int {
+    updateCollectionButtons()
+    return stackChip.count
+  }
+
+  var debugStackChipIsSelected: Bool {
+    stackChip.isSelected
+  }
+
+  func debugPressStackChip() {
+    stackChip.onPress()
+  }
+
   var debugCollectionRailVisibleWidth: CGFloat {
     collectionScrollView.contentView.bounds.width
   }

sources/clipbored/views/ClipboardPanelViewModel.swift

@@ -15,6 +15,7 @@ final class ClipboardPanelViewModel {
   var sortMode: ClipboardSortMode {
     didSet {
       guard oldValue != sortMode else { return }
+      isStackFilterSelected = false
       selectedCollectionName = nil
       settings.defaultSortMode = sortMode
       recomputeVisibleItems()
@@ -28,6 +29,13 @@ final class ClipboardPanelViewModel {
       onCollectionsChanged?()
     }
   }
+  private(set) var isStackFilterSelected = false {
+    didSet {
+      guard oldValue != isStackFilterSelected else { return }
+      recomputeVisibleItems()
+      onStackChanged?()
+    }
+  }
   var selectedIndex: Int = 0 {
     didSet {
       guard oldValue != selectedIndex else { return }
@@ -96,6 +104,10 @@ final class ClipboardPanelViewModel {
     stackItemIDs.count
   }
 
+  var stackTitle: String {
+    "Stack"
+  }
+
   var collectionNames: [String] {
     let assignedNames = Set(
       items.compactMap { item -> String? in
@@ -216,12 +228,24 @@ final class ClipboardPanelViewModel {
     statusMessage = "Added to Stack"
   }
 
+  func selectStack() {
+    guard !stackItemIDs.isEmpty else { return }
+    selectedCollectionName = nil
+    isStackFilterSelected = true
+  }
+
+  func clearStackSelection() {
+    guard isStackFilterSelected else { return }
+    isStackFilterSelected = false
+  }
+
   func clearStack() {
     guard !stackItemIDs.isEmpty else {
       statusMessage = "Stack is empty"
       return
     }
     stackItemIDs.removeAll()
+    isStackFilterSelected = false
     statusMessage = "Cleared Stack"
   }
 
@@ -363,6 +387,7 @@ final class ClipboardPanelViewModel {
 
   func selectCollection(named name: String) {
     guard let normalizedName = ClipboardCollectionDefaults.normalizedName(name) else { return }
+    isStackFilterSelected = false
     selectedCollectionName = normalizedName
   }
 
@@ -374,7 +399,14 @@ final class ClipboardPanelViewModel {
     pruneStackItems()
     let previousSelection = selectedItemID
     let query = searchText.clipboardTrimmed.lowercased()
-    visibleItems = computeVisibleItems(from: items, query: query, sortMode: sortMode, collectionName: selectedCollectionName)
+    if isStackFilterSelected {
+      let stackedItems = stackItemIDs.compactMap { id in
+        items.first { $0.id == id }
+      }
+      visibleItems = computeStackVisibleItems(from: stackedItems, query: query)
+    } else {
+      visibleItems = computeVisibleItems(from: items, query: query, sortMode: sortMode, collectionName: selectedCollectionName)
+    }
 
     if let selectedID = previousSelection, let index = visibleItems.firstIndex(where: { $0.id == selectedID }) {
       selectedIndex = index
@@ -432,6 +464,18 @@ final class ClipboardPanelViewModel {
     if pruned != stackItemIDs {
       stackItemIDs = pruned
     }
+    if stackItemIDs.isEmpty && isStackFilterSelected {
+      isStackFilterSelected = false
+    }
+  }
+
+  private func computeStackVisibleItems(from items: [ClipboardItem], query: String) -> [ClipboardItem] {
+    let tokens = searchTokens(from: query.lowercased())
+    guard !tokens.isEmpty else { return items }
+    return items.filter { item in
+      let text = searchableText(for: item)
+      return tokens.allSatisfy { text.contains($0) }
+    }
   }
 
   internal func computeVisibleItems(