Scan image text to be searchable

Fixes #992

Maccy/Models/HistoryItem.swift

@@ -2,6 +2,7 @@ import AppKit
 import Defaults
 import Sauce
 import SwiftData
+import Vision
 
 @Model
 class HistoryItem {
@@ -73,6 +74,9 @@ class HistoryItem {
 
   func generateTitle() -> String {
     guard image == nil else {
+      Task {
+        self.performTextRecognition()
+      }
       return ""
     }
 
@@ -195,4 +199,32 @@ class HistoryItem {
       .filter { types.contains(NSPasteboard.PasteboardType($0.type)) }
       .compactMap { $0.value }
   }
+
+  private func performTextRecognition() {
+    guard let cgImage = image?.cgImage(forProposedRect: nil, context: nil, hints: nil) else {
+      return
+    }
+
+    let requestHandler = VNImageRequestHandler(cgImage: cgImage)
+    let request = VNRecognizeTextRequest(completionHandler: recognizeTextHandler)
+    request.recognitionLevel = .fast
+
+    do {
+      try requestHandler.perform([request])
+    } catch {
+      print("Unable to perform the request: \(error).")
+    }
+  }
+
+  private func recognizeTextHandler(request: VNRequest, error: Error?) {
+    guard let observations = request.results as? [VNRecognizedTextObservation] else {
+      return
+    }
+
+    let recognizedStrings = observations.compactMap { observation in
+      return observation.topCandidates(1).first?.string
+    }
+
+    self.title = recognizedStrings.joined(separator: "\n")
+  }
 }

Maccy/Views/ListItemView.swift

@@ -35,11 +35,11 @@ struct ListItemView<Title: View>: View {
           .padding(.leading, showIcons ? 5 : 10)
           .padding(.trailing, 5)
           .padding(.vertical, 5)
+      } else {
+        ListItemTitleView(attributedTitle: attributedTitle, title: title)
+          .padding(.leading, showIcons ? 0 : 5)
       }
 
-      ListItemTitleView(attributedTitle: attributedTitle, title: title)
-        .padding(.leading, showIcons ? 0 : 5)
-
       Spacer()
 
       if !shortcuts.isEmpty {