[ios_platform_images] migrate objC to swift

packages/ios_platform_images/AUTHORS

@@ -64,3 +64,4 @@ Aleksandr Yurkovskiy <[email protected]>
 Anton Borries <[email protected]>
 Alex Li <[email protected]>
 Rahul Raj <[email protected]>
+Mairramer <[email protected]>

packages/ios_platform_images/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.3
+
+* Migrates to a Swift implementation.
+
 ## 0.2.2+2
 
 * Adds pub topics to package metadata.

packages/ios_platform_images/example/ios/Podfile

@@ -28,9 +28,6 @@ require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelpe
 flutter_ios_podfile_setup
 
 target 'Runner' do
-  use_frameworks!
-  use_modular_headers!
-
   flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
   target 'RunnerTests' do
     inherit! :search_paths

packages/ios_platform_images/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

packages/ios_platform_images/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -20,6 +20,20 @@
                ReferencedContainer = "container:Runner.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "NO"
+            buildForProfiling = "NO"
+            buildForArchiving = "NO"
+            buildForAnalyzing = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "F76AC1BD266713D00040C8BC"
+               BuildableName = "RunnerTests.xctest"
+               BlueprintName = "RunnerTests"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
       </BuildActionEntries>
    </BuildAction>
    <TestAction

packages/ios_platform_images/example/ios/Runner/AppDelegate.swift

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import UIKit
 import Flutter
+import UIKit
 
 @UIApplicationMain
 @objc class AppDelegate: FlutterAppDelegate {

packages/ios_platform_images/example/ios/RunnerTests/IosPlatformImagesTests.swift

@@ -0,0 +1,100 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import Flutter
+import XCTest
+
+@testable import ios_platform_images
+
+class IosPlatformImagesTests: XCTestCase {
+
+  func testHandleMethodCall_loadImage() {
+    let assetName = "flutter"
+
+    let call = FlutterMethodCall(methodName: "loadImage", arguments: [assetName])
+
+    let mockChannel = MockMethodChannel()
+
+    let plugin = IosPlatformImagesPlugin(channel: mockChannel)
+
+    let resultExpectation = expectation(description: "result block must be called.")
+
+    plugin.handle(call) { result in
+      let result = result as? [String: Any]
+      XCTAssertNotNil(result)
+
+      let scale = result?["scale"] as? CGFloat
+      let data = result?["data"] as? FlutterStandardTypedData
+
+      XCTAssertNotNil(scale)
+      XCTAssertNotNil(data)
+
+      resultExpectation.fulfill()
+    }
+
+    waitForExpectations(timeout: 2, handler: nil)
+  }
+
+  func testHandleMethodCall_loadImage_notFound() {
+    let assetName = "flutterNotFound"
+
+    let call = FlutterMethodCall(methodName: "loadImage", arguments: [assetName])
+
+    let mockChannel = MockMethodChannel()
+
+    let plugin = IosPlatformImagesPlugin(channel: mockChannel)
+
+    let resultExpectation = expectation(description: "result block must be called.")
+
+    plugin.handle(call) { result in
+      let result = result as? [String: Any]
+
+      XCTAssertNil(result)
+      resultExpectation.fulfill()
+    }
+
+    waitForExpectations(timeout: 2, handler: nil)
+  }
+
+  func testHandleMethodCall_resolveURL() {
+    let assetName = "textfile"
+
+    let call = FlutterMethodCall(methodName: "resolveURL", arguments: [assetName])
+
+    let mockChannel = MockMethodChannel()
+
+    let plugin = IosPlatformImagesPlugin(channel: mockChannel)
+
+    let resultExpectation = expectation(description: "result block must be called.")
+
+    plugin.handle(call) { result in
+      let result = result as? String
+      XCTAssertNotNil(result)
+      XCTAssertEqual(result?.components(separatedBy: "/").last, assetName)
+      resultExpectation.fulfill()
+    }
+
+    waitForExpectations(timeout: 1, handler: nil)
+  }
+
+  func testHandleMethodCall_resolveURL_notFound() {
+    let assetName = "notFound"
+
+    let call = FlutterMethodCall(methodName: "resolveURL", arguments: [assetName])
+
+    let mockChannel = MockMethodChannel()
+
+    let plugin = IosPlatformImagesPlugin(channel: mockChannel)
+
+    let resultExpectation = expectation(description: "result block must be called.")
+
+    plugin.handle(call) { result in
+      XCTAssertNil(result)
+      resultExpectation.fulfill()
+    }
+
+    waitForExpectations(timeout: 1, handler: nil)
+  }
+
+}

packages/ios_platform_images/example/ios/RunnerTests/Mocks/MockMethodChannel.swift

@@ -0,0 +1,14 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import Foundation
+
+@testable import ios_platform_images
+
+final class MockMethodChannel: MethodChannel {
+  var invokeMethodStub: ((_ methods: String, _ arguments: Any?) -> Void)? = nil
+  func invokeMethod(_ method: String, arguments: Any?) {
+    invokeMethodStub?(method, arguments)
+  }
+}

packages/ios_platform_images/ios/Classes/IosPlatformImagesPlugin.swift

@@ -0,0 +1,69 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import Flutter
+import Foundation
+
+public final class IosPlatformImagesPlugin: NSObject, FlutterPlugin {
+
+  private let channel: MethodChannel
+
+  init(channel: MethodChannel) {
+    self.channel = channel
+  }
+
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(
+      name: "plugins.flutter.io/ios_platform_images",
+      binaryMessenger: registrar.messenger())
+
+    let instance = IosPlatformImagesPlugin(channel: channel)
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    switch call.method {
+    case "loadImage":
+      loadImage(call, result)
+    case "resolveURL":
+      resolveURL(call, result)
+    default:
+      result(FlutterMethodNotImplemented)
+    }
+  }
+
+  private func loadImage(_ call: FlutterMethodCall, _ result: @escaping FlutterResult) {
+    guard let arguments = call.arguments as? [Any],
+      let name = arguments.first as? String,
+      let image = flutterImage(withName: name)
+    else {
+      result(nil)
+      return
+    }
+
+    let data = image.pngData()
+
+    let imageResult: [String: Any] = [
+      "scale": image.scale,
+      "data": FlutterStandardTypedData(bytes: data!),
+    ]
+
+    result(imageResult)
+  }
+
+  private func resolveURL(_ call: FlutterMethodCall, _ result: @escaping FlutterResult) {
+    if let args = call.arguments as? [String?] {
+      let name = args[0]
+      let extensionName = args.count == 2 ? args[1] : nil
+
+      if let url = Bundle.main.url(forResource: name, withExtension: extensionName) {
+        result(url.absoluteString)
+      } else {
+        result(nil)
+      }
+    } else {
+      result(nil)
+    }
+  }
+}

packages/ios_platform_images/ios/Classes/MethodChannel.swift

@@ -0,0 +1,16 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import Flutter
+
+/// A channel for platform code to communicate with the Dart code.
+protocol MethodChannel {
+  /// Invokes a method in Dart code.
+  /// - Parameter method the method name.
+  /// - Parameter arguments the method arguments.
+  func invokeMethod(_ method: String, arguments: Any?)
+}
+
+/// A default implementation of the `MethodChannel` protocol.
+extension FlutterMethodChannel: MethodChannel {}

packages/ios_platform_images/ios/Classes/UIImage+ios_platform_images.h → packages/ios_platform_images/ios/Classes/UIImageIosPlatformImages.swift

@@ -2,9 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import <UIKit/UIKit.h>
-
-@interface UIImage (ios_platform_images)
+import Flutter
+import Foundation
+import UIKit
 
 /// Loads a UIImage from the embedded Flutter project's assets.
 ///
@@ -22,6 +22,13 @@
 ///
 /// Note: We don't yet support images from package dependencies (ex.
 /// `AssetImage('icons/heart.png', package: 'my_icons')`).
-+ (UIImage *)flutterImageWithName:(NSString *)name;
 
-@end
+func flutterImage(withName imageName: String) -> UIImage? {
+    for scale in stride(from: Int(UIScreen.main.scale), through: 1, by: -1) {
+      let scaledImage = imageName.replacingOccurrences(of: ".", with: "@\(scale)x.")
+      return UIImage(named: scaledImage, in: Bundle.main, compatibleWith: nil)
+    }
+
+    return UIImage(named: imageName, in: Bundle.main, compatibleWith: nil)
+  }
+