Allow opening folder dragged to dock

Author: GetToSet

sources/LocalizationEditor/AppDelegate.swift

@@ -26,6 +26,17 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         return true
     }
 
+    func application(_ sender: NSApplication, openFile filename: String) -> Bool {
+        var isDirectory: ObjCBool = false
+        if FileManager.default.fileExists(atPath: filename, isDirectory: &isDirectory), isDirectory.boolValue == true {
+            showEditorWindow()
+            let windowController = (Self.editorWindow?.windowController) as! WindowController
+            windowController.openFolder(withPath: filename)
+            return true
+        }
+        return false
+    }
+
     private func showEditorWindow() {
         if let editorWindow = Self.editorWindow {
             editorWindow.makeKeyAndOrderFront(nil)

sources/LocalizationEditor/Info.plist

@@ -4,6 +4,21 @@
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeName</key>
+			<string>Localization Folder</string>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>LSHandlerRank</key>
+			<string>Default</string>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>public.folder</string>
+			</array>
+		</dict>
+	</array>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIconFile</key>

sources/LocalizationEditor/UI/ViewController.swift

@@ -120,17 +120,8 @@ final class ViewController: NSViewController {
         tableView.reloadData()
     }
 
-    private func openFolder() {
-        let openPanel = NSOpenPanel()
-        openPanel.allowsMultipleSelection = false
-        openPanel.canChooseDirectories = true
-        openPanel.canCreateDirectories = true
-        openPanel.canChooseFiles = false
-        openPanel.begin { [unowned self] result -> Void in
-            guard result.rawValue == NSApplication.ModalResponse.OK.rawValue, let url = openPanel.url else {
-                return
-            }
-
+    private func openFolder(forPath path: String? = nil) {
+        let handleOpenFolder: (URL) -> Void = { url in
             self.progressIndicator.startAnimation(self)
             self.dataSource.load(folder: url) { [unowned self] languages, title, localizationFiles in
                 self.reloadData(with: languages, title: title)
@@ -142,6 +133,22 @@ final class ViewController: NSViewController {
                 }
             }
         }
+
+        if let path = path {
+            handleOpenFolder(URL(fileURLWithPath: path))
+        } else {
+            let openPanel = NSOpenPanel()
+            openPanel.allowsMultipleSelection = false
+            openPanel.canChooseDirectories = true
+            openPanel.canCreateDirectories = true
+            openPanel.canChooseFiles = false
+            openPanel.begin { result -> Void in
+                guard result.rawValue == NSApplication.ModalResponse.OK.rawValue, let url = openPanel.url else {
+                    return
+                }
+                handleOpenFolder(url)
+            }
+        }
     }
 }
 
@@ -253,6 +260,13 @@ extension ViewController: WindowControllerToolbarDelegate {
     func userDidRequestFolderOpen() {
         openFolder()
     }
+
+    /**
+     Invoked when user requests opening a folder for specific path
+     */
+    func userDidRequestFolderOpen(withPath path: String) {
+        openFolder(forPath: path)
+    }
 }
 
 // MARK: - AddViewControllerDelegate

sources/LocalizationEditor/UI/WindowController.swift

@@ -17,6 +17,11 @@ protocol WindowControllerToolbarDelegate: AnyObject {
      */
     func userDidRequestFolderOpen()
 
+    /**
+     Invoked when user requests opening a folder for a specific path
+     */
+    func userDidRequestFolderOpen(withPath: String)
+
     /**
      Invoked when user requests filter change
 
@@ -68,6 +73,12 @@ final class WindowController: NSWindowController {
         setupDelegates()
     }
 
+    // MAKR: - Interfaces
+
+    func openFolder(withPath path: String) {
+        delegate?.userDidRequestFolderOpen(withPath: path)
+    }
+
     // MARK: - Setup
 
     private func setupDelegates() {