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‎.gitignore

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.DS_Store
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/.build
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/Packages
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xcuserdata/
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DerivedData/
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.swiftpm/configuration/registries.json
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.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
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.netrc

‎LICENSE.md

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MIT License
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Copyright (c) 2024 Jia-Han Wu
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎Package.swift

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// swift-tools-version: 5.10
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// The swift-tools-version declares the minimum version of Swift required to build this package.
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import PackageDescription
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let package = Package(
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name: "swiftui-code39",
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platforms: [
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.iOS(.v15),
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.macOS(.v12),
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],
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products: [
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.library(
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name: "Code39",
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targets: ["Code39"]
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),
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],
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targets: [
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.target(name: "Code39"),
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]
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)

‎README.md

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# SwiftUI Code39
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SwiftUI Code39 is a Swift package that provides an easy way to generate Code 39 barcodes in your SwiftUI applications.
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## Installation
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To use SwiftUI Code39 in your project, add the following line to your `Package.swift` file:
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```swift
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dependencies: [
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.package(url: "https://github.com/jiahan-wu/swiftui-code39.git", from: "1.0.0")
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]
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```
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Then, import the package in your Swift code:
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```swift
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import Code39
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```
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## Usage
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To generate a Code 39 barcode, simply create an instance of `Code39View` and provide the desired content as a string:
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```swift
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struct ContentView: View {
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var body: some View {
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Code39View("HELLO WORLD")
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.frame(width: 296, height: 96)
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}
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}
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```
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## Important Note
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It is the responsibility of the library user to ensure that the content passed to `Code39View` consists of valid characters supported by Code 39. You can use the `code39SupportedCharacters` set to check if a character is supported:
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```swift
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let content = "HELLO"
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let isValid = content.allSatisfy { code39SupportedCharacters.contains($0) }
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```
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## License
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SwiftUI Code39 is released under the MIT License. See the `LICENSE` file for more information.
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## Contributing
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Contributions to SwiftUI Code39 are welcome! If you find any issues or have suggestions for improvements, please open an issue or submit a pull request on the GitHub repository.

‎Sources/Code39/Code39.swift

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// The Swift Programming Language
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//
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// Code39.swift
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//
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//
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// Created by Jia-Han Wu on 2024/5/4.
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//
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enum BarWidth {
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case narrow
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case wide
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}
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let code39Patterns: [Character: [BarWidth]] = [
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" ": [.narrow, .wide, .wide, .narrow, .narrow, .narrow, .wide, .narrow, .narrow],
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"$": [.narrow, .wide, .narrow, .wide, .narrow, .wide, .narrow, .narrow, .narrow],
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"%": [.narrow, .narrow, .narrow, .wide, .narrow, .wide, .narrow, .wide, .narrow],
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"*": [.narrow, .wide, .narrow, .narrow, .wide, .narrow, .wide, .narrow, .narrow],
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"+": [.narrow, .wide, .narrow, .narrow, .narrow, .wide, .narrow, .wide, .narrow],
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"-": [.narrow, .wide, .narrow, .narrow, .narrow, .narrow, .wide, .narrow, .wide],
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".": [ .wide, .wide, .narrow, .narrow, .narrow, .narrow, .wide, .narrow, .narrow],
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"/": [.narrow, .wide, .narrow, .wide, .narrow, .narrow, .narrow, .wide, .narrow],
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"0": [.narrow, .narrow, .narrow, .wide, .wide, .narrow, .wide, .narrow, .narrow],
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"1": [ .wide, .narrow, .narrow, .wide, .narrow, .narrow, .narrow, .narrow, .wide],
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"2": [.narrow, .narrow, .wide, .wide, .narrow, .narrow, .narrow, .narrow, .wide],
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"3": [ .wide, .narrow, .wide, .wide, .narrow, .narrow, .narrow, .narrow, .narrow],
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"4": [.narrow, .narrow, .narrow, .wide, .wide, .narrow, .narrow, .narrow, .wide],
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"5": [ .wide, .narrow, .narrow, .wide, .wide, .narrow, .narrow, .narrow, .narrow],
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"6": [.narrow, .narrow, .wide, .wide, .wide, .narrow, .narrow, .narrow, .narrow],
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"7": [.narrow, .narrow, .narrow, .wide, .narrow, .narrow, .wide, .narrow, .wide],
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"8": [ .wide, .narrow, .narrow, .wide, .narrow, .narrow, .wide, .narrow, .narrow],
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"9": [.narrow, .narrow, .wide, .wide, .narrow, .narrow, .wide, .narrow, .narrow],
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"A": [ .wide, .narrow, .narrow, .narrow, .narrow, .wide, .narrow, .narrow, .wide],
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"B": [.narrow, .narrow, .wide, .narrow, .narrow, .wide, .narrow, .narrow, .wide],
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"C": [ .wide, .narrow, .wide, .narrow, .narrow, .wide, .narrow, .narrow, .narrow],
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"D": [.narrow, .narrow, .narrow, .narrow, .wide, .wide, .narrow, .narrow, .wide],
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"E": [ .wide, .narrow, .narrow, .narrow, .wide, .wide, .narrow, .narrow, .narrow],
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"F": [.narrow, .narrow, .wide, .narrow, .wide, .wide, .narrow, .narrow, .narrow],
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"G": [.narrow, .narrow, .narrow, .narrow, .narrow, .wide, .wide, .narrow, .wide],
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"H": [ .wide, .narrow, .narrow, .narrow, .narrow, .wide, .wide, .narrow, .narrow],
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"I": [.narrow, .narrow, .wide, .narrow, .narrow, .wide, .wide, .narrow, .narrow],
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"J": [.narrow, .narrow, .narrow, .narrow, .wide, .wide, .wide, .narrow, .narrow],
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"K": [ .wide, .narrow, .narrow, .narrow, .narrow, .narrow, .narrow, .wide, .wide],
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"L": [.narrow, .narrow, .wide, .narrow, .narrow, .narrow, .narrow, .wide, .wide],
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"M": [ .wide, .narrow, .wide, .narrow, .narrow, .narrow, .narrow, .wide, .narrow],
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"N": [.narrow, .narrow, .narrow, .narrow, .wide, .narrow, .narrow, .wide, .wide],
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"O": [ .wide, .narrow, .narrow, .narrow, .wide, .narrow, .narrow, .wide, .narrow],
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"P": [.narrow, .narrow, .wide, .narrow, .wide, .narrow, .narrow, .wide, .narrow],
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"Q": [.narrow, .narrow, .narrow, .narrow, .narrow, .narrow, .wide, .wide, .wide],
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"R": [ .wide, .narrow, .narrow, .narrow, .narrow, .narrow, .wide, .wide, .narrow],
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"S": [.narrow, .narrow, .wide, .narrow, .narrow, .narrow, .wide, .wide, .narrow],
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"T": [.narrow, .narrow, .narrow, .narrow, .wide, .narrow, .wide, .wide, .narrow],
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"U": [ .wide, .wide, .narrow, .narrow, .narrow, .narrow, .narrow, .narrow, .wide],
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"V": [.narrow, .wide, .wide, .narrow, .narrow, .narrow, .narrow, .narrow, .wide],
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"W": [ .wide, .wide, .wide, .narrow, .narrow, .narrow, .narrow, .narrow, .narrow],
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"X": [.narrow, .wide, .narrow, .narrow, .wide, .narrow, .narrow, .narrow, .wide],
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"Y": [ .wide, .wide, .narrow, .narrow, .wide, .narrow, .narrow, .narrow, .narrow],
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"Z": [.narrow, .wide, .wide, .narrow, .wide, .narrow, .narrow, .narrow, .narrow],
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]
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func encodeToCode39(_ input: String) -> [BarWidth] {
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var encodedBarcode: [BarWidth] = []
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encodedBarcode.append(contentsOf: code39Patterns["*"]!)
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encodedBarcode.append(.narrow)
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for character in input {
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encodedBarcode.append(contentsOf: code39Patterns[character]!)
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encodedBarcode.append(.narrow)
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}
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encodedBarcode.append(contentsOf: code39Patterns["*"]!)
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return encodedBarcode
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}
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public let code39SupportedCharacters: Set<Character> = Set(code39Patterns.keys)

‎Sources/Code39/Code39View.swift

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//
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// Code39View.swift
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//
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//
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// Created by Jia-Han Wu on 2024/5/4.
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//
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import SwiftUI
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public struct Code39View: View {
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private let barcode: [BarWidth]
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public init(_ content: String) {
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self.barcode = encodeToCode39(content)
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}
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public var body: some View {
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Canvas { context, size in
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let intercharacterGapCount = barcode.count % 9
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let narrowBarWidth = size.width / CGFloat(((((barcode.count - intercharacterGapCount) / 9) * 15) + intercharacterGapCount))
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var currentX: CGFloat = 0
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for (index, barWidth) in barcode.enumerated() {
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let barColor: Color = index % 2 == 0 ? .black : .white
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let barWidth: CGFloat = barWidth == .narrow ? narrowBarWidth : narrowBarWidth * 3
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var barPath = Path()
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let barRect = CGRect(x: currentX,
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y: 0,
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width: barWidth,
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height: size.height)
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currentX += barWidth
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barPath.addRect(barRect)
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context.fill(barPath, with: .color(barColor))
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}
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}
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}
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}

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