Move to a standard SwiftUI window for preview windows so I can add toolbar items from SwiftUI. Not ideal. Added support for previewing text files too.

1 files changed, 124 insertions, 0 deletions

diff --git a/Hotline/macOS/FilePreviewImageView.swift b/Hotline/macOS/FilePreviewImageView.swift
new file mode 100644
index 0000000..1ee4e9b
--- /dev/null
+++ b/Hotline/macOS/FilePreviewImageView.swift
@@ -0,0 +1,124 @@
+import SwiftUI
+import UniformTypeIdentifiers
+
+struct FilePreviewImageView: View {
+  enum FilePreviewFocus: Hashable {
+    case window
+  }
+  
+  @Environment(\.controlActiveState) private var controlActiveState
+  @Environment(\.colorScheme) private var colorScheme
+  @Environment(\.dismiss) var dismiss
+  
+  @Binding var info: PreviewFileInfo?
+  
+  @State var preview: FilePreview? = nil
+  @Namespace var mainNamespace
+  @FocusState private var focusField: FilePreviewFocus?
+  
+  var body: some View {
+    Group {
+      if preview?.state != .loaded {
+        HStack(alignment: .center, spacing: 0) {
+          ProgressView(value: max(0.0, min(1.0, preview?.progress ?? 0.0)))
+            .focusable(false)
+            .progressViewStyle(.circular)
+            .controlSize(.extraLarge)
+            .tint(.white)
+            .frame(maxWidth: 300, alignment: .center)
+        }
+        .frame(minWidth: 350, maxWidth: 350, minHeight: 150, maxHeight: 150)
+        .padding()
+      }
+      else {
+        if let image = preview?.image {
+          AnimatedImageView(image: image)
+            .frame(minWidth: 200, maxWidth: .infinity, minHeight: 200, 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()
+          }
+          .frame(minWidth: 350, maxWidth: 350, minHeight: 150, maxHeight: 150)
+          .padding()
+        }
+      }
+    }
+    .focusable()
+    .focusEffectDisabled()
+    .focused($focusField, equals: .window)
+    .preferredColorScheme(.dark)
+    .navigationTitle(info?.name ?? "Preview")
+    .background(.black)
+    .toolbar {
+      ToolbarItem(placement: .navigation) {
+        FileIconView(filename: info?.name ?? "")
+          .frame(width: 16, height: 16)
+          .opacity(controlActiveState == .inactive ? 0.5 : 1.0)
+      }
+      
+      if let img = preview?.image {
+        if let info = info {
+          ToolbarItem(placement: .primaryAction) {
+            Button {
+              let _ = preview?.data?.saveAsFileToDownloads(filename: info.name)
+            } label: {
+              Label("Save Image...", systemImage: "photo.badge.arrow.down")
+            }
+            .help("Save Image")
+          }
+          
+          ToolbarItem(placement: .primaryAction) {
+            ShareLink(item: img, preview: SharePreview(info.name, image: img)) {
+              Label("Share Image...", systemImage: "square.and.arrow.up")
+            }
+            .help("Share Image")
+          }
+        }
+      }
+    }
+    .task {
+      if let info = info {
+        preview = FilePreview(info: info)
+        preview?.download()
+      }
+    }
+    .onAppear {
+      if info == nil {
+        Task {
+          dismiss()
+        }
+        return
+      }
+      
+      focusField = .window
+    }
+    .onDisappear {
+      preview?.cancel()
+      dismiss()
+    }
+    .onChange(of: preview?.state) {
+      if preview?.state == .failed {
+        dismiss()
+      }
+    }
+  }
+}