Re-add image analysis interaction

See #450

Packages/GalleryVC/Sources/GalleryVC/GalleryContentViewController.swift

@@ -15,6 +15,8 @@ public protocol GalleryContentViewController: UIViewController {
     var caption: String? { get }
     var bottomControlsAccessoryViewController: UIViewController? { get }
     var canAnimateFromSourceView: Bool { get }
+    
+    func setControlsVisible(_ visible: Bool, animated: Bool)
 }
 
 public extension GalleryContentViewController {
@@ -25,4 +27,7 @@ public extension GalleryContentViewController {
     var canAnimateFromSourceView: Bool {
         true
     }
+    
+    func setControlsVisible(_ visible: Bool, animated: Bool) {
+    }
 }

Packages/GalleryVC/Sources/GalleryVC/GalleryContentViewControllerContainer.swift

@@ -9,6 +9,8 @@ import Foundation
 
 @MainActor
 public protocol GalleryContentViewControllerContainer {
+    var galleryControlsVisible: Bool { get }
+    
     func setGalleryContentLoading(_ loading: Bool)
     func galleryContentChanged()
     func disableGalleryScrollAndZoom()

Packages/GalleryVC/Sources/GalleryVC/GalleryItemViewController.swift

@@ -192,6 +192,8 @@ class GalleryItemViewController: UIViewController {
     }
     
     func addContent() {
+        content.setControlsVisible(controlsVisible, animated: false)
+        
         content.view.translatesAutoresizingMaskIntoConstraints = false
         if content.parent != self {
             addChild(content)
@@ -229,6 +231,7 @@ class GalleryItemViewController: UIViewController {
         func updateControlsViews() {
             topControlsView.transform = CGAffineTransform(translationX: 0, y: visible ? 0 : -topControlsView.bounds.height)
             bottomControlsView.transform = CGAffineTransform(translationX: 0, y: visible ? 0 : bottomControlsView.bounds.height)
+            content.setControlsVisible(visible, animated: animated)
         }
         if animated {
             let animator = UIViewPropertyAnimator(duration: 0.2, timingParameters: UISpringTimingParameters())
@@ -396,6 +399,10 @@ class GalleryItemViewController: UIViewController {
 }
 
 extension GalleryItemViewController: GalleryContentViewControllerContainer {
+    var galleryControlsVisible: Bool {
+        controlsVisible
+    }
+    
     func setGalleryContentLoading(_ loading: Bool) {
         if loading {
             if activityIndicator == nil {

Tusker/Screens/Gallery/ImageGalleryContentViewController.swift

@@ -10,6 +10,7 @@ import UIKit
 import GalleryVC
 import Pachyderm
 import TuskerComponents
+@preconcurrency import VisionKit
 
 class ImageGalleryContentViewController: UIViewController, GalleryContentViewController {
     let url: URL
@@ -18,6 +19,12 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
     let image: UIImage
     let gifController: GIFController?
     
+    @available(iOS 16.0, macCatalyst 17.0, *)
+    private static let analyzer = ImageAnalyzer()
+    private var _analysisInteraction: AnyObject?
+    @available(iOS 16.0, macCatalyst 17.0, *)
+    private var analysisInteraction: ImageAnalysisInteraction? { _analysisInteraction as? ImageAnalysisInteraction }
+    
     init(url: URL, caption: String?, originalData: Data?, image: UIImage, gifController: GIFController?) {
         self.url = url
         self.caption = caption
@@ -40,6 +47,7 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
         let imageView = GIFImageView(image: image)
         imageView.translatesAutoresizingMaskIntoConstraints = false
         imageView.contentMode = .scaleAspectFit
+        imageView.isUserInteractionEnabled = true
         view.addSubview(imageView)
         NSLayoutConstraint.activate([
             imageView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
@@ -51,6 +59,22 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
         if let gifController {
             gifController.attach(to: imageView)
         }
+        
+        if gifController == nil,
+           #available(iOS 16.0, macCatalyst 17.0, *) {
+            let interaction = ImageAnalysisInteraction(self)
+            self._analysisInteraction = interaction
+            interaction.preferredInteractionTypes = .automatic
+            imageView.addInteraction(interaction)
+            Task {
+                do {
+                    let result = try await ImageGalleryContentViewController.analyzer.analyze(image, configuration: ImageAnalyzer.Configuration([.text, .machineReadableCode]))
+                    interaction.analysis = result
+                } catch {
+                    // if analysis fails, we just don't show anything
+                }
+            }
+        }
     }
     
     override func viewWillAppear(_ animated: Bool) {
@@ -76,4 +100,18 @@ class ImageGalleryContentViewController: UIViewController, GalleryContentViewCon
             return []
         }
     }
+    
+    func setControlsVisible(_ visible: Bool, animated: Bool) {
+        if #available(iOS 16.0, macCatalyst 17.0, *),
+           let analysisInteraction {
+            analysisInteraction.setSupplementaryInterfaceHidden(!visible, animated: animated)
+        }
+    }
+}
+
+@available(iOS 16.0, macCatalyst 17.0, *)
+extension ImageGalleryContentViewController: ImageAnalysisInteractionDelegate {
+    func interaction(_ interaction: ImageAnalysisInteraction, shouldBeginAt point: CGPoint, for interactionType: ImageAnalysisInteraction.InteractionTypes) -> Bool {
+        return container?.galleryControlsVisible ?? true
+    }
 }

Tusker/Screens/Gallery/LoadingGalleryContentViewController.swift

@@ -50,6 +50,7 @@ class LoadingGalleryContentViewController: UIViewController, GalleryContentViewC
             if let wrapped = await provider() {
                 self.wrapped = wrapped
                 wrapped.container = container
+                wrapped.setControlsVisible(container?.galleryControlsVisible ?? false, animated: false)
                 
                 addChild(wrapped)
                 wrapped.view.translatesAutoresizingMaskIntoConstraints = false
@@ -99,4 +100,8 @@ class LoadingGalleryContentViewController: UIViewController, GalleryContentViewC
         ])
     }
     
+    func setControlsVisible(_ visible: Bool, animated: Bool) {
+        wrapped?.setControlsVisible(visible, animated: animated)
+    }
+    
 }