Refactor

Sources/Csv2Img/Csv.swift

@@ -130,7 +130,7 @@ extension Csv {
     /**
      `ExportType` is a enum that expresses
      */
-    public enum ExportType: String, Hashable {
+    public enum ExportType: String, Hashable, CaseIterable {
         /// `png` output
         case png
         /// `pdf` output (Work In Progress)
@@ -365,10 +365,9 @@ extension Csv {
         }
         if let maker = maker as? ImageMaker {
             if let fontSize = fontSize {
-                maker.setFontSize(fontSize)
+                maker.set(fontSize: fontSize)
             }
-            // TODO: When Swift5.7 is supported officailly, replace `CGImage` with `any CsvExportable`.
-            let exportable: CGImage = try await withCheckedThrowingContinuation { continuation in
+            let exportable: any CsvExportable = try await withCheckedThrowingContinuation { continuation in
                 queue.async { [weak self] in
                     guard let self = self else {
                         continuation.resume(throwing: Csv.Error.underlying(nil))
@@ -389,7 +388,7 @@ extension Csv {
             return AnyCsvExportable(exportable)
         } else if let maker = maker as? PdfMaker {
             if let fontSize = fontSize {
-                maker.setFontSize(fontSize)
+                maker.set(fontSize: fontSize)
             }
             let exportable: PDFDocument = try await withCheckedThrowingContinuation { continuation in
                 queue.async { [weak self] in

Sources/Csv2Img/CsvColumn.swift

@@ -24,7 +24,7 @@ extension Csv {
     /// →Column is [1, 2, 3, 4] and Row is [5, 6, 7, 8].
     ///
     /// Because this class is usually initialized via ``Csv``, you do not have to take care about ``Column`` in detail.
-    public struct Column {
+    public struct Column: Sendable {
         public var name: Name
         public var style: Style
 
@@ -37,7 +37,7 @@ extension Csv {
 
 extension Csv.Column {
     /// ``Style`` decides the appearance of certain ``Column`` group.
-    public struct Style {
+    public struct Style: Sendable {
         /// `color` is a ``CGColor`` corresponding to textColor which is used when drawing
         public var color: CGColor
         /// `applyOnlyColumn` determines whether this style affects both `Column` and `Row` or not.

Sources/Csv2Img/ImageMaker.swift

@@ -25,12 +25,10 @@ public enum ImageMakingError: Error {
 /// No overview available
 protocol ImageMakerType: Maker {
     var latestOutput: CGImage? { get }
-    func make(columns: [Csv.Column], rows: [Csv.Row], progress: @escaping (Double) -> Void) throws -> CGImage
-    func setFontSize(_ size: Double)
 }
 
 /// `ImageMarker` generate png-image from ``Csv``.
-class ImageMaker: ImageMakerType {
+final class ImageMaker: ImageMakerType {
 
     typealias Exportable = CGImage
 
@@ -48,7 +46,7 @@ class ImageMaker: ImageMakerType {
 
     var latestOutput: CGImage?
 
-    func setFontSize(_ size: Double) {
+    func set(fontSize size: Double) {
         self.fontSize = size
     }
 

Sources/Csv2Img/Maker.swift

@@ -1,10 +1,10 @@
 import Foundation
 
-public protocol Maker {
+public protocol Maker: Sendable {
     associatedtype Exportable: CsvExportable
 
     var maximumRowCount: Int? { get }
 
-    func make(columns: [Csv.Column], rows: [Csv.Row], progress: @escaping (Double) -> Void) throws -> Exportable
-    func setFontSize(_ size: Double)
+    func make(columns: [Csv.Column], rows: [Csv.Row], progress: @escaping @Sendable (Double) -> Void) throws -> Exportable
+    func set(fontSize size: Double)
 }

Sources/Csv2Img/PdfMaker.swift

@@ -6,20 +6,19 @@ public enum PdfMakingError: Error {
     /// Failed to get/create `CGContext`.
     case noContextAvailabe
     case failedToGeneratePdf
+    case failedToSavePdf(at : String)
     case emptyRows
     case underlying(Error)
 }
 
 /// No overview available
 protocol PdfMakerType: Maker {
     var latestOutput: PDFDocument? { get }
-    func make(columns: [Csv.Column], rows: [Csv.Row], progress: @escaping (Double) -> Void) throws -> PDFDocument
     func setMetadata(_ metadata: PDFMetadata)
-    func setFontSize(_ size: Double)
 }
 
 /// ``PdfMaker`` generate pdf from ``Csv`` (Work In Progress).
-class PdfMaker: PdfMakerType {
+final class PdfMaker: PdfMakerType {
 
     typealias Exportable = PDFDocument
 
@@ -33,17 +32,16 @@ class PdfMaker: PdfMakerType {
         self.metadata = metadata
     }
 
-    var maximumRowCount: Int?
-    var fontSize: Double
+    let maximumRowCount: Int?
+    private(set) var fontSize: Double
     var metadata: PDFMetadata
 
     var latestOutput: PDFDocument?
 
-    func setFontSize(_ size: Double) {
+    func set(fontSize size: Double) {
         self.fontSize = size
     }
 
-
     /// generate png-image data from ``Csv``.
     func make(
         columns: [Csv.Column],
@@ -53,6 +51,7 @@ class PdfMaker: PdfMakerType {
         // NOTE: Anchor is bottom-left.
         let horizontalSpace: Double = 8
         let verticalSpace: Double = 12
+        let maxRowsHeight: Double = 480
 
         let size = min(maximumRowCount ?? rows.count, rows.count)
         let rows = rows[..<size].map { $0 }
@@ -82,13 +81,13 @@ class PdfMaker: PdfMakerType {
         let width = (longestWidth + horizontalSpace) * Double(columns.count)
         let allRowsHeight = Double(rows.count) * (longestHeight + verticalSpace)
 
-        let maxRowsHeight = min(480, allRowsHeight)
+        let largestRowsHeight = min(maxRowsHeight, allRowsHeight)
 
-        let totalPageNumber = Int(allRowsHeight / maxRowsHeight)
+        let totalPageNumber = Int(allRowsHeight / largestRowsHeight)
 
         let totalHeight = allRowsHeight + Double(totalPageNumber) * rowHeight
 
-        let pageHeight = min(maxRowsHeight + rowHeight, totalHeight)
+        let pageHeight = min(largestRowsHeight + rowHeight, totalHeight)
 
         var mediaBox = CGRect(
             origin: .zero,

Sources/Csv2Img/TypeConvertible.swift

@@ -2,12 +2,12 @@ import CoreFoundation
 import CoreGraphics
 import PDFKit
 
-public protocol CsvExportable {
+public protocol CsvExportable: Sendable {
 }
 
-public class AnyCsvExportable: CsvExportable {
+public final class AnyCsvExportable: CsvExportable {
 
-    public var base: CsvExportable
+    public let base: CsvExportable
 
     public init(_ csvExportable: CsvExportable) {
         self.base = csvExportable
@@ -16,4 +16,5 @@ public class AnyCsvExportable: CsvExportable {
 
 extension CGImage: CsvExportable { }
 extension Data: CsvExportable { }
+extension PDFDocument: @unchecked Sendable {}
 extension PDFDocument: CsvExportable { }