style: spelling and grammar check

Sources/Cache/CacheSerializer.swift

@@ -86,7 +86,7 @@ public struct DefaultCacheSerializer: CacheSerializer {
     /// In that case, the serialization will fall back to creating data from image.
     public var preferCacheOriginalData: Bool = false
 
-    /// Returnes the `preferCacheOriginalData` value. When the original data is used, Kingfisher needs to re-apply the
+    /// Returns the `preferCacheOriginalData` value. When the original data is used, Kingfisher needs to re-apply the
     /// processors to get the desired final image.
     public var originalDataUsed: Bool { preferCacheOriginalData }
 

Sources/Cache/DiskStorage.swift

@@ -467,7 +467,7 @@ extension DiskStorage {
 
         /// Default is `false`
         /// If set to `true`, image extension will be extracted from original file name and append to
-        /// the hased file name and used as the cache key on disk.
+        /// the hashed file name and used as the cache key on disk.
         public var autoExtAfterHashedFileName = false
 
         /// Closure that takes in initial directory path and generates

Sources/Cache/ImageCache.swift

@@ -548,7 +548,7 @@ open class ImageCache {
     ///                        will be sent to this closure as result. Otherwise, a `KingfisherError` result
     ///                        with detail failing reason will be sent.
     ///
-    /// Note: This method is marked as `open` for only compatible purpose. Do not overide this method. Instead, override
+    /// Note: This method is marked as `open` for only compatible purpose. Do not override this method. Instead, override
     ///       the version receives `KingfisherParsedOptionsInfo` instead.
     open func retrieveImage(forKey key: String,
                                options: KingfisherOptionsInfo? = nil,
@@ -585,7 +585,7 @@ open class ImageCache {
     /// - Returns: The image stored in memory cache, if exists and valid. Otherwise, if the image does not exist or
     ///            has already expired, `nil` is returned.
     ///
-    /// Note: This method is marked as `open` for only compatible purpose. Do not overide this method. Instead, override
+    /// Note: This method is marked as `open` for only compatible purpose. Do not override this method. Instead, override
     ///       the version receives `KingfisherParsedOptionsInfo` instead.
     open func retrieveImageInMemoryCache(
         forKey key: String,

Sources/Cache/MemoryStorage.swift

@@ -44,7 +44,7 @@ public enum MemoryStorage {
     public class Backend<T: CacheCostCalculable> {
         let storage = NSCache<NSString, StorageObject<T>>()
 
-        // Keys trackes the objects once inside the storage. For object removing triggered by user, the corresponding
+        // Keys track the objects once inside the storage. For object removing triggered by user, the corresponding
         // key would be also removed. However, for the object removing triggered by cache rule/policy of system, the
         // key will be remained there until next `removeExpired` happens.
         //

Sources/General/ImageSource/ImageDataProvider.swift

@@ -172,7 +172,7 @@ public struct RawImageDataProvider: ImageDataProvider {
     /// Creates an image data provider by the given raw `data` value and a `cacheKey` be used in Kingfisher cache.
     ///
     /// - Parameters:
-    ///   - data: The raw data reprensents an image.
+    ///   - data: The raw data represents an image.
     ///   - cacheKey: The key is used for caching the image data. You need a different key for any different image.
     public init(data: Data, cacheKey: String) {
         self.data = data

Sources/General/KFOptionsSetter.swift

@@ -247,7 +247,7 @@ extension KFOptionSetter {
     /// - Returns: A `Self` value with changes applied.
     /// If set, options will be passed the store operation for a new files.
     ///
-    /// This is useful if you want to implement file enctyption on first write - eg [.completeFileProtection]
+    /// This is useful if you want to implement file encryption on first write - eg [.completeFileProtection]
     ///
     public func diskStoreWriteOptions(_ writingOptions: Data.WritingOptions) -> Self {
         options.diskStoreWriteOptions = writingOptions

Sources/General/KingfisherError.swift

@@ -459,7 +459,7 @@ extension KingfisherError.ImageSettingErrorReason {
         case .dataProviderError(let provider, let error):
             return "Image data provider fails to provide data. Provider: \(provider), error: \(error)"
         case .alternativeSourcesExhausted(let errors):
-            return "Image setting from alternaive sources failed: \(errors)"
+            return "Image setting from alternative sources failed: \(errors)"
         }
     }
 

Sources/General/KingfisherManager.swift

@@ -58,7 +58,7 @@ public struct RetrieveImageResult {
     /// Gets the data behind the result.
     ///
     /// If this result is from a network downloading (when `cacheType == .none`), calling this returns the downloaded
-    /// data. If the reuslt is from cache, it serializes the image with the given cache serializer in the loading option
+    /// data. If the result is from cache, it serializes the image with the given cache serializer in the loading option
     /// and returns the result.
     ///
     /// - Note:

Sources/Image/Image.swift

@@ -403,7 +403,7 @@ extension KingfisherWrapper where Base: KFCrossPlatformImage {
     /// input image in pixel format. It does downsampling from the image data, so it is much
     /// more memory efficient and friendly. Choose to use downsampling as possible as you can.
     ///
-    /// The pointsize should be smaller than the size of input image. If it is larger than the
+    /// The point size should be smaller than the size of input image. If it is larger than the
     /// original image size, the result image will be the same size of input without downsampling.
     public static func downsampledImage(data: Data, to pointSize: CGSize, scale: CGFloat) -> KFCrossPlatformImage? {
         let imageSourceOptions = [kCGImageSourceShouldCache: false] as CFDictionary

Sources/Image/ImageProcessor.swift

@@ -589,7 +589,7 @@ public struct ResizingImageProcessor: ImageProcessor {
     }
 }
 
-/// Processor for adding blur effect to images. `Accelerate.framework` is used underhood for 
+/// Processor for adding blur effect to images. `Accelerate.framework` is used under the hood for
 /// a better performance. A simulated Gaussian blur with specified blur radius will be applied.
 public struct BlurImageProcessor: ImageProcessor {
 

Sources/Image/ImageProgressive.swift

@@ -51,7 +51,7 @@ public struct ImageProgressive {
 
     /// A default `ImageProgressive` could be used across. It blurs the progressive loading with the fastest
     /// scan enabled and scan interval as 0.
-    @available(*, deprecated, message: "Getting a default `ImageProgressive` is deprecated due to its syntax symatic is not clear. Use `ImageProgressive.init` instead.", renamed: "init()")
+    @available(*, deprecated, message: "Getting a default `ImageProgressive` is deprecated due to its syntax semantic is not clear. Use `ImageProgressive.init` instead.", renamed: "init()")
     public static let `default` = ImageProgressive(
         isBlur: true,
         isFastestScan: true,

Sources/Networking/ImagePrefetcher.swift

@@ -303,7 +303,7 @@ public class ImagePrefetcher: CustomStringConvertible {
         }
     }
 
-    /// Stops current downloading progress, and cancel any future prefetching activity that might be occuring.
+    /// Stops current downloading progress, and cancel any future prefetching activity that might be occurring.
     public func stop() {
         prefetchQueue.async {
             if self.finished { return }
@@ -409,7 +409,7 @@ public class ImagePrefetcher: CustomStringConvertible {
 
     private func reportCompletionOrStartNext() {
         if let resource = self.pendingSources.popFirst() {
-            // Loose call stack for huge ammount of sources.
+            // Loose call stack for huge amount of sources.
             prefetchQueue.async { self.startPrefetching(resource) }
         } else {
             guard allFinished else { return }

Sources/Networking/RedirectHandler.swift

@@ -30,7 +30,7 @@ import Foundation
 public protocol ImageDownloadRedirectHandler {
 
     /// The `ImageDownloadRedirectHandler` contained will be used to change the request before redirection.
-    /// This is the posibility you can modify the image download request during redirection. You can modify the
+    /// This is the possibility you can modify the image download request during redirection. You can modify the
     /// request for some customizing purpose, such as adding auth token to the header, do basic HTTP auth or
     /// something like url mapping.
     ///

Tests/KingfisherTests/DataReceivingSideEffectTests.swift

@@ -80,13 +80,13 @@ class DataReceivingSideEffectTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: testImageData, length: 123)
 
-        let receiver = DataReceivingNotAppyStub()
+        let receiver = DataReceivingNotApplyStub()
 
         let options: KingfisherOptionsInfo = [/*.onDataReceived([receiver]),*/ .waitForCache]
         KingfisherManager.shared.retrieveImage(with: url, options: options) {
             result in
             XCTAssertTrue(receiver.called)
-            XCTAssertFalse(receiver.appied)
+            XCTAssertFalse(receiver.applied)
             exp.fulfill()
         }
         waitForExpectations(timeout: 3, handler: nil)
@@ -101,17 +101,17 @@ class DataReceivingStub: DataReceivingSideEffect {
     }
 }
 
-class DataReceivingNotAppyStub: DataReceivingSideEffect {
+class DataReceivingNotApplyStub: DataReceivingSideEffect {
 
     var called: Bool = false
-    var appied: Bool = false
+    var applied: Bool = false
 
     var onShouldApply: () -> Bool = { return false }
 
     func onDataReceived(_ session: URLSession, task: SessionDataTask, data: Data) {
         called = true
         if onShouldApply() {
-            appied = true
+            applied = true
         }
     }
 }

Tests/KingfisherTests/ImageCacheTests.swift

@@ -235,7 +235,7 @@ class ImageCacheTests: XCTestCase {
     }
 
 
-    func testCachedImageIsFetchedSyncronouslyFromTheMemoryCache() {
+    func testCachedImageIsFetchedSynchronouslyFromTheMemoryCache() {
         cache.store(testImage, forKey: testKeys[0], toDisk: false)
         var foundImage: KFCrossPlatformImage?
         cache.retrieveImage(forKey: testKeys[0]) { result in

Tests/KingfisherTests/ImageDownloaderTests.swift

@@ -137,7 +137,7 @@ class ImageDownloaderTests: XCTestCase {
         }
 
 
-        let someURL = URL(string: "some_strage_url")!
+        let someURL = URL(string: "some_strange_url")!
         let task = downloader.downloadImage(with: someURL, options: [.requestModifier(asyncModifier)]) { result in
             XCTAssertNotNil(result.value)
             XCTAssertEqual(result.value?.url, url)
@@ -412,13 +412,13 @@ class ImageDownloaderTests: XCTestCase {
         stub(url, data: testImageData)
 
         let p = RoundCornerImageProcessor(cornerRadius: 40)
-        let roundcornered = testImage.kf.image(withRoundRadius: 40, fit: testImage.kf.size)
+        let roundCornered = testImage.kf.image(withRoundRadius: 40, fit: testImage.kf.size)
 
         downloader.downloadImage(with: url, options: [.processor(p)]) { result in
             XCTAssertNotNil(result.value)
             let image = result.value!.image
             XCTAssertFalse(image.renderEqual(to: testImage))
-            XCTAssertTrue(image.renderEqual(to: roundcornered))
+            XCTAssertTrue(image.renderEqual(to: roundCornered))
             XCTAssertEqual(result.value!.originalData, testImageData)
             exp.fulfill()
         }
@@ -432,7 +432,7 @@ class ImageDownloaderTests: XCTestCase {
         let stub = delayedStub(url, data: testImageData)
 
         let p1 = RoundCornerImageProcessor(cornerRadius: 40)
-        let roundcornered = testImage.kf.image(withRoundRadius: 40, fit: testImage.kf.size)
+        let roundCornered = testImage.kf.image(withRoundRadius: 40, fit: testImage.kf.size)
 
         let p2 = BlurImageProcessor(blurRadius: 3.0)
         let blurred = testImage.kf.blurred(withRadius: 3.0)
@@ -441,7 +441,7 @@ class ImageDownloaderTests: XCTestCase {
 
         group.enter()
         let task1 = downloader.downloadImage(with: url, options: [.processor(p1)]) { result in
-            XCTAssertTrue(result.value!.image.renderEqual(to: roundcornered))
+            XCTAssertTrue(result.value!.image.renderEqual(to: roundCornered))
             group.leave()
         }
 

Tests/KingfisherTests/ImageViewExtensionTests.swift

@@ -347,7 +347,7 @@ class ImageViewExtensionTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testDownloadForMutipleURLs() {
+    func testDownloadForMultipleURLs() {
         let exp = expectation(description: #function)
 
         stub(testURLs[0], data: testImageData)
@@ -837,7 +837,7 @@ class ImageViewExtensionTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: testImageData)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         imageView.kf.setImage(
@@ -884,7 +884,7 @@ class ImageViewExtensionTests: XCTestCase {
                 XCTFail("The error should be a task cancelled.")
                 return
             }
-            XCTAssertEqual(task.task.originalRequest?.url, url, "Should be the alternatived url cancelled.")
+            XCTAssertEqual(task.task.originalRequest?.url, url, "Should be the alternative URL canceled.")
         }
 
         waitForExpectations(timeout: 1, handler: nil)

Tests/KingfisherTests/KingfisherManagerTests.swift

@@ -149,7 +149,7 @@ class KingfisherManagerTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testSuccessCompletionHandlerRunningOnMainQueueDefaultly() {
+    func testSuccessCompletionHandlerRunningOnMainQueueByDefault() {
         let progressExpectation = expectation(description: "progressBlock running on main queue")
         let completionExpectation = expectation(description: "completionHandler running on main queue")
 
@@ -186,7 +186,7 @@ class KingfisherManagerTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testErrorCompletionHandlerRunningOnMainQueueDefaultly() {
+    func testErrorCompletionHandlerRunningOnMainQueueByDefault() {
         let exp = expectation(description: #function)
         let url = testURLs[0]
         stub(url, data: testImageData, statusCode: 404)
@@ -200,7 +200,7 @@ class KingfisherManagerTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testSucessCompletionHandlerRunningOnCustomQueue() {
+    func testSuccessCompletionHandlerRunningOnCustomQueue() {
         let progressExpectation = expectation(description: "progressBlock running on custom queue")
         let completionExpectation = expectation(description: "completionHandler running on custom queue")
 
@@ -811,7 +811,7 @@ class KingfisherManagerTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: testImageData)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         _ = manager.retrieveImage(
@@ -835,7 +835,7 @@ class KingfisherManagerTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: Data())
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         let anotherBrokenURL = URL(string: "anotherBrokenURL")!
@@ -876,7 +876,7 @@ class KingfisherManagerTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: testImageData)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         var downloadTaskUpdatedCount = 0
@@ -903,7 +903,7 @@ class KingfisherManagerTests: XCTestCase {
         let url = testURLs[0]
         stub(url, data: testImageData)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         let task = manager.retrieveImage(
@@ -926,7 +926,7 @@ class KingfisherManagerTests: XCTestCase {
         let url = testURLs[0]
         let dataStub = delayedStub(url, data: testImageData)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         var task: DownloadTask!

Tests/KingfisherTests/MemoryStorageTests.swift

@@ -69,7 +69,7 @@ class MemoryStorageTests: XCTestCase {
         XCTAssertEqual(storage.value(forKey: "1"), 1)
     }
 
-    func testStoreValueOverwritting() {
+    func testStoreValueOverwriting() {
         storage.store(value: 1, forKey: "1")
         XCTAssertEqual(storage.value(forKey: "1"), 1)
 

Tests/KingfisherTests/NSButtonExtensionTests.swift

@@ -106,7 +106,7 @@ class NSButtonExtensionTests: XCTestCase {
         waitForExpectations(timeout: 5, handler: nil)
     }
 
-    func testCacnelImageTask() {
+    func testCancelImageTask() {
         let exp = expectation(description: #function)
         let url = testURLs[0]
         let stub = delayedStub(url, data: testImageData)
@@ -123,7 +123,7 @@ class NSButtonExtensionTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testCacnelAlternateImageTask() {
+    func testCancelAlternateImageTask() {
         let exp = expectation(description: #function)
         let url = testURLs[0]
         let stub = delayedStub(url, data: testImageData)

Tests/KingfisherTests/RetryStrategyTests.swift

@@ -86,7 +86,7 @@ class RetryStrategyTests: XCTestCase {
     func testKingfisherManagerCanRetry() {
         let exp = expectation(description: #function)
 
-        let brokenURL = URL(string: "brokenurl")!
+        let brokenURL = URL(string: "broken_url")!
         stub(brokenURL, data: Data())
 
         let retry = StubRetryStrategy()
@@ -115,7 +115,7 @@ class RetryStrategyTests: XCTestCase {
         )
         retry.retry(context: context1) { decision in
             guard case RetryDecision.retry(let userInfo) = decision else {
-                XCTFail("The deicision should be `retry`")
+                XCTFail("The decision should be `retry`")
                 return
             }
             XCTAssertNil(userInfo)
@@ -131,7 +131,7 @@ class RetryStrategyTests: XCTestCase {
         context2.increaseRetryCount() // 3
         retry.retry(context: context2) { decision in
             guard case RetryDecision.stop = decision else {
-                XCTFail("The deicision should be `stop`")
+                XCTFail("The decision should be `stop`")
                 return
             }
             blockCalled.append(true)

Tests/KingfisherTests/UIButtonExtensionTests.swift

@@ -110,7 +110,7 @@ class UIButtonExtensionTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testCacnelImageTask() {
+    func testCancelImageTask() {
         let exp = expectation(description: #function)
         let url = testURLs[0]
         let stub = delayedStub(url, data: testImageData)
@@ -128,7 +128,7 @@ class UIButtonExtensionTests: XCTestCase {
         waitForExpectations(timeout: 3, handler: nil)
     }
 
-    func testCacnelBackgroundImageTask() {
+    func testCancelBackgroundImageTask() {
         let exp = expectation(description: #function)
         let url = testURLs[0]
         let stub = delayedStub(url, data: testImageData)