fxm90 · March 19, 2026 16:26 · fxm90 · Jun 28, 2021 · fxm90 · Jun 28, 2021
diff --git a/SwiftUI+HTML.swift b/SwiftUI+HTML.swift
 //
 //  SwiftUI+HTML.swift
 //
 //  Created by Felix Mau on 28.05.21.
 //  Copyright © 2021 Felix Mau. All rights reserved.
 //

 import SwiftUI

 @available(iOS 15.0, *)
 enum HTMLToMarkdownConverter {

    // MARK: - Public methods

    /// Converts the HTML-tags in the given string to their corresponding markdown tags.
    ///
    /// - SeeAlso: See type `HTMLToMarkdownConverter.Tags` for a list of supported HTML-tags.
    static func convert(_ htmlAsString: String) -> String {
        // Convert "basic" HTML-tags that don't use an attribute.
        let markdownAsString = Tags.allCases.reduce(htmlAsString) { result, textFormattingTag in
            result
                .replacingOccurrences(of: textFormattingTag.openingHtmlTag, with: textFormattingTag.markdownTag)
                .replacingOccurrences(of: textFormattingTag.closingHtmlTag, with: textFormattingTag.markdownTag)
        }

        // Hyperlinks use an attribute and therefore need to be handled differently.
        return convertHtmlLinksToMarkdown(markdownAsString)
    }

    // MARK: - Private methods

    /// Converts hyperlinks in HTML-format to their corresponding markdown representations.
    ///
    /// - Note: Currently we only support a basic HTML syntax without any attributed other than `href`.
    ///         E.g. `<a href="URL">TEXT</a>` will be converted to `[TEXT](URL)`
    ///
    /// - Parameter htmlAsString: The string containing hyperlinks in HTML-format.
    ///
    /// - Returns: A string with hyperlinks converted to their corresponding markdown representations.
    private static func convertHtmlLinksToMarkdown(_ htmlAsString: String) -> String {
        htmlAsString.replacingOccurrences(of: "<a href=\"(.+)\">(.+)</a>",
                                          with: "[$2]($1)",
                                          options: .regularExpression,
                                          range: nil)
    }
 }

 extension HTMLToMarkdownConverter {

    /// The supported tags inside a string we can format.
    enum Tags: String, CaseIterable {
        case strong
        case em
        case s
        case code

        // Hyperlinks need to be handled differently, as they not only have simple opening and closing tag, but also use the attribute `href`.
        // See private method `Text.convertHtmlLinksToMarkdown(:)` for further details.
        // case a

        // MARK: - Public properties

        var openingHtmlTag: String {
            "<\(rawValue)>"
        }

        var closingHtmlTag: String {
            "</\(rawValue)>"
        }

        var markdownTag: String {
            switch self {
            case .strong:
                return "**"

            case .em:
                return "*"

            case .s:
                return "~~"

            case .code:
                return "`"
            }
        }
    }
 }

 @available(iOS 15.0, *)
 extension Text {

    // MARK: - Initializer

    /// Renders the given string containing HTML-tags with the related formatting.
    ///
    /// - SeeAlso: See type `HTMLToMarkdownConverter.Tags` for a list of supported HTML-tags.
    init(html htmlAsString: String) {
        let markdownAsString = HTMLToMarkdownConverter.convert(htmlAsString)

        do {
            let markdownAsAttributedString = try AttributedString(markdown: markdownAsString)
            self = .init(markdownAsAttributedString)
        } catch {
            print("⚠️ – Couldn't parse markdown: \(error)")

            // Show the "plain" markdown string as a fallback.
            self = .init(markdownAsString)
        }
    }
 }
	//
	// SwiftUI+HTML.swift
	//
	// Created by Felix Mau on 28.05.21.
	// Copyright © 2021 Felix Mau. All rights reserved.
	//

	import SwiftUI

	@available(iOS 15.0, *)
	enum HTMLToMarkdownConverter {

	// MARK: - Public methods

	/// Converts the HTML-tags in the given string to their corresponding markdown tags.
	///
	/// - SeeAlso: See type `HTMLToMarkdownConverter.Tags` for a list of supported HTML-tags.
	static func convert(_ htmlAsString: String) -> String {
	// Convert "basic" HTML-tags that don't use an attribute.
	let markdownAsString = Tags.allCases.reduce(htmlAsString) { result, textFormattingTag in
	result
	.replacingOccurrences(of: textFormattingTag.openingHtmlTag, with: textFormattingTag.markdownTag)
	.replacingOccurrences(of: textFormattingTag.closingHtmlTag, with: textFormattingTag.markdownTag)
	}

	// Hyperlinks use an attribute and therefore need to be handled differently.
	return convertHtmlLinksToMarkdown(markdownAsString)
	}

	// MARK: - Private methods

	/// Converts hyperlinks in HTML-format to their corresponding markdown representations.
	///
	/// - Note: Currently we only support a basic HTML syntax without any attributed other than `href`.
	/// E.g. `<a href="URL">TEXT</a>` will be converted to `[TEXT](URL)`
	///
	/// - Parameter htmlAsString: The string containing hyperlinks in HTML-format.
	///
	/// - Returns: A string with hyperlinks converted to their corresponding markdown representations.
	private static func convertHtmlLinksToMarkdown(_ htmlAsString: String) -> String {
	htmlAsString.replacingOccurrences(of: "<a href=\"(.+)\">(.+)</a>",
	with: "[$2]($1)",
	options: .regularExpression,
	range: nil)
	}
	}

	extension HTMLToMarkdownConverter {

	/// The supported tags inside a string we can format.
	enum Tags: String, CaseIterable {
	case strong
	case em
	case s
	case code

	// Hyperlinks need to be handled differently, as they not only have simple opening and closing tag, but also use the attribute `href`.
	// See private method `Text.convertHtmlLinksToMarkdown(:)` for further details.
	// case a

	// MARK: - Public properties

	var openingHtmlTag: String {
	"<\(rawValue)>"
	}

	var closingHtmlTag: String {
	"</\(rawValue)>"
	}

	var markdownTag: String {
	switch self {
	case .strong:
	return "**"

	case .em:
	return "*"

	case .s:
	return "~~"

	case .code:
	return "`"
	}
	}
	}
	}

	@available(iOS 15.0, *)
	extension Text {

	// MARK: - Initializer

	/// Renders the given string containing HTML-tags with the related formatting.
	///
	/// - SeeAlso: See type `HTMLToMarkdownConverter.Tags` for a list of supported HTML-tags.
	init(html htmlAsString: String) {
	let markdownAsString = HTMLToMarkdownConverter.convert(htmlAsString)

	do {
	let markdownAsAttributedString = try AttributedString(markdown: markdownAsString)
	self = .init(markdownAsAttributedString)
	} catch {
	print("⚠️ – Couldn't parse markdown: \(error)")

	// Show the "plain" markdown string as a fallback.
	self = .init(markdownAsString)
	}
	}
	}
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