osx: implements quicklook

osx/kordophone2/Models.swift

@@ -116,6 +116,14 @@ enum Display
             data.previewPath
         }
 
+        var isFullsizeDownloaded: Bool {
+            data.isDownloaded
+        }
+
+        var fullsizePath: String {
+            data.path
+        }
+
         init(from serialized: Serialized.Attachment, dateSent: Date, sender: Sender) {
             self.id = serialized.guid
             self.sender = sender

osx/kordophone2/Transcript/PreviewPanel.swift

@@ -0,0 +1,39 @@
+//
+//  PreviewPanel.swift
+//  Kordophone
+//
+//  Created by James Magahern on 9/12/25.
+//
+
+import AppKit
+import QuickLook
+import QuickLookUI
+
+internal class PreviewPanel
+{
+    static let shared = PreviewPanel()
+
+    private var displayedURL: URL? = nil
+    private var impl: QLPreviewPanel { QLPreviewPanel.shared() }
+
+    private init() {
+        impl.dataSource = self
+    }
+
+    public func show(url: URL) {
+        self.displayedURL = url
+        impl.makeKeyAndOrderFront(self)
+    }
+}
+
+
+extension PreviewPanel: QLPreviewPanelDataSource
+{
+    func numberOfPreviewItems(in panel: QLPreviewPanel!) -> Int {
+        1
+    }
+
+    func previewPanel(_ panel: QLPreviewPanel!, previewItemAt index: Int) -> (any QLPreviewItem)! {
+        return displayedURL! as NSURL
+    }
+}

osx/kordophone2/Transcript/TranscriptDisplayItemViews.swift

@@ -90,6 +90,7 @@ struct ImageItemView: View
     @Environment(\.xpcClient) var xpcClient
     
     @State private var containerWidth: CGFloat? = nil
+    @State private var isDownloadingFullAttachment: Bool = false
 
     private var aspectRatio: CGFloat {
         attachment.size?.aspectRatio ?? 1.0
@@ -102,6 +103,8 @@ struct ImageItemView: View
     var body: some View {
         BubbleView(sender: sender, date: date) {
             let maxWidth = CGFloat.minimum(.imageMaxWidth, containerWidth ?? .imageMaxWidth)
+
+            Group {
                 if let img {
                     Image(nsImage: img)
                         .resizable()
@@ -114,6 +117,23 @@ struct ImageItemView: View
                         .frame(maxWidth: maxWidth)
                 }
             }
+
+            // Download indicator
+            .overlay {
+                if isDownloadingFullAttachment {
+                    ZStack {
+                        Rectangle()
+                            .fill(.black.opacity(0.2))
+
+                        ProgressView()
+                            .progressViewStyle(.circular)
+                    }
+                }
+            }
+        }
+        .onTapGesture(count: 2) {
+            openAttachment()
+        }
         .onGeometryChange(for: CGFloat.self,
                           of: { $0.size.width },
                           action: { containerWidth = $0 })
@@ -136,6 +156,24 @@ struct ImageItemView: View
             }
         }
     }
+
+    private func openAttachment() {
+        Task {
+            var path = attachment.fullsizePath
+            if !attachment.isFullsizeDownloaded {
+                isDownloadingFullAttachment = true
+                try await xpcClient.downloadAttachment(attachmentId: attachment.id, preview: false, awaitCompletion: true)
+
+                // Need to re-fetch this -- the extension may have changed.
+                let info = try await xpcClient.getAttachmentInfo(attachmentId: attachment.id)
+                path = info.path
+
+                isDownloadingFullAttachment = false
+            }
+
+            PreviewPanel.shared.show(url: URL(filePath: path))
+        }
+    }
 }
 
 struct PlaceholderImageItemView: View

osx/kordophone2/XPC/XPCClient.swift

@@ -146,13 +146,33 @@ final class XPCClient
         guard let reply = try await sendSync(req), xpc_get_type(reply) == XPC_TYPE_DICTIONARY else { throw Error.typeError }
     }
 
-    public func downloadAttachment(attachmentId: String, preview: Bool) async throws {
+    public func getAttachmentInfo(attachmentId: String) async throws -> AttachmentInfo {
+        var args: [String: xpc_object_t] = [:]
+        args["attachment_id"] = xpcString(attachmentId)
+
+        let req = makeRequest(method: "GetAttachmentInfo", arguments: args)
+        guard let reply = try await sendSync(req), xpc_get_type(reply) == XPC_TYPE_DICTIONARY else { throw Error.typeError }
+        
+        return AttachmentInfo(
+            path: reply["path"] ?? "",
+            previewPath: reply["preview_path"] ?? "",
+            isDownloaded: reply["is_downloaded"] ?? false,
+            isPreviewDownloaded: reply["is_preview_downloaded"] ?? false
+        )
+    }
+
+    public func downloadAttachment(attachmentId: String, preview: Bool, awaitCompletion: Bool = false) async throws {
         var args: [String: xpc_object_t] = [:]
         args["attachment_id"] = xpcString(attachmentId)
         args["preview"] = xpcString(preview ? "true" : "false")
 
         let req = makeRequest(method: "DownloadAttachment", arguments: args)
         _ = try await sendSync(req)
+
+        if awaitCompletion {
+            // Wait for downloaded event
+            let _ = await eventStream().first { $0 == .attachmentDownloaded(attachmentId: attachmentId) }
+        }
     }
     
     public func uploadAttachment(path: String) async throws -> String {
@@ -201,6 +221,14 @@ final class XPCClient
     
     // MARK: - Types
 
+    struct AttachmentInfo: Decodable
+    {
+        let path: String
+        let previewPath: String
+        let isDownloaded: Bool
+        let isPreviewDownloaded: Bool
+    }
+    
     enum Error: Swift.Error
     {
         case typeError
@@ -209,7 +237,7 @@ final class XPCClient
         case connectionError
     }
     
-    enum Signal
+    enum Signal: Equatable
     {
         case conversationsUpdated
         case messagesUpdated(conversationId: String)

osx/kordophone2/XPC/XPCConvertible.swift

@@ -76,6 +76,22 @@ extension Array: XPCConvertible where Element: XPCConvertible
     }
 }
 
+extension Bool: XPCConvertible
+{
+    static func fromXPC(_ value: xpc_object_t) -> Bool? {
+        if xpc_get_type(value) == XPC_TYPE_BOOL {
+            return xpc_bool_get_value(value)
+        }
+
+        if xpc_get_type(value) == XPC_TYPE_STRING {
+            guard let cstr = xpc_string_get_string_ptr(value) else { return nil }
+            return strcmp(cstr, "true") == 0
+        }
+
+        return nil
+    }
+}
+
 extension xpc_object_t
 {
     func getObject(_ key: String) -> xpc_object_t? {