1 files changed, 114 insertions, 0 deletions
diff --git a/Hotline/macOS/Files/FilePreviewQuickLookView.swift b/Hotline/macOS/Files/FilePreviewQuickLookView.swift
new file mode 100644
index 0000000..a504a7a
--- /dev/null
+++ b/Hotline/macOS/Files/FilePreviewQuickLookView.swift
@@ -0,0 +1,114 @@
+import SwiftUI
+import UniformTypeIdentifiers
+
+struct FilePreviewQuickLookView: View {
+  enum FilePreviewFocus: Hashable {
+    case window
+  }
+
+  @Environment(\.controlActiveState) private var controlActiveState
+  @Environment(\.colorScheme) private var colorScheme
+  @Environment(\.dismiss) private var dismiss
+
+  @Binding var info: PreviewFileInfo?
+  @State private var preview: FilePreviewState? = nil
+  
+  @FocusState private var focusField: FilePreviewFocus?
+
+  var body: some View {
+    Group {
+      if self.preview?.state != .loaded {
+        VStack(alignment: .center, spacing: 0) {
+          Spacer()
+          ProgressView(value: max(0.0, min(1.0, self.preview?.progress ?? 0.0)))
+            .focusable(false)
+            .progressViewStyle(.circular)
+            .controlSize(.extraLarge)
+            .frame(maxWidth: 300, alignment: .center)
+            .padding(.bottom, 48)
+          Spacer()
+        }
+        .background(Color(nsColor: .textBackgroundColor))
+        .frame(minWidth: 350, maxWidth: .infinity, minHeight: 150, maxHeight: .infinity)
+        .padding()
+      }
+      else {
+        if let fileURL = self.preview?.fileURL {
+          QuickLookPreviewView(fileURL: fileURL)
+            .frame(minWidth: 400, maxWidth: .infinity, minHeight: 400, maxHeight: .infinity)
+        }
+        else {
+          VStack(alignment: .center, spacing: 0) {
+            Spacer()
+
+            Image(systemName: "eye.trianglebadge.exclamationmark")
+              .resizable()
+              .scaledToFit()
+              .frame(maxWidth: .infinity)
+              .frame(height: 48)
+              .padding(.bottom)
+            Group {
+              Text("This file type is not previewable")
+                .bold()
+              Text("Try downloading and opening this file in another application.")
+                .foregroundStyle(Color.secondary)
+            }
+            .font(.system(size: 14.0))
+            .frame(maxWidth: 300)
+            .multilineTextAlignment(.center)
+
+            Spacer()
+            Spacer()
+          }
+          .frame(minWidth: 350, maxWidth: .infinity, minHeight: 150, maxHeight: .infinity)
+          .padding()
+        }
+      }
+    }
+    .focusable()
+    .focusEffectDisabled()
+    .background(Color(nsColor: .textBackgroundColor))
+    .focused(self.$focusField, equals: .window)
+    .navigationTitle(self.info?.name ?? "File Preview")
+    .applyNavigationDocumentIfPresent(self.preview?.fileURL)
+    .toolbar {
+      if let fileURL = self.preview?.fileURL {
+        if let info = info {
+          ToolbarItem(placement: .primaryAction) {
+            Button {
+              FileManager.default.copyToDownloads(from: fileURL, using: info.name, bounceDock: true)
+            } label: {
+              Label("Download File...", systemImage: "arrow.down")
+            }
+            .help("Download File")
+          }
+        }
+      }
+    }
+    .task {
+      if let info = self.info {
+        self.preview = FilePreviewState(info: info)
+        self.preview?.download()
+      }
+    }
+    .onAppear {
+      guard self.info != nil else {
+        self.dismiss()
+        return
+      }
+
+      self.focusField = .window
+    }
+    .onDisappear {
+      self.preview?.cancel()
+      self.preview?.cleanup()
+      self.dismiss()
+    }
+    .onChange(of: self.preview?.state) {
+      if self.preview?.state == .failed {
+        self.dismiss()
+      }
+    }
+    .preferredColorScheme(.dark)
+  }
+}