Revert "Delete Markdown.swift"

This reverts commit f2619ee.

Sources/Highlighter/Markdown.swift

@@ -0,0 +1,189 @@
+//
+//  GlyphHandler.swift
+//  Jellycore
+//
+//  Created by Zachary lineman on 10/27/20.
+//
+
+import UIKit
+
+/// A simple markdown parser
+public class Markdown {
+
+    public static func createAttributedString(input: String, theme: Theme, shouldTint: Bool = false) -> NSMutableAttributedString {
+        let tColor = theme.defaultFontColor
+        let fontSize: CGFloat = UIFont.systemFontSize
+        let regularFont = UIFont.systemFont(ofSize: fontSize)
+        let attributedString = NSMutableAttributedString(string: input, attributes: [NSAttributedString.Key.font: regularFont, NSAttributedString.Key.foregroundColor: tColor])
+
+        //MARK: Detect Bold
+        let boldFont = UIFont.boldSystemFont(ofSize: fontSize)
+
+        let boldRegex = try? NSRegularExpression(pattern: "(\\*\\*|__)(.*?)(\\*\\*|__)", options: [])
+        if let matches = boldRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 2), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: boldFont, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let italicFont = UIFont.italicSystemFont(ofSize: fontSize)
+        let italicRegex = try? NSRegularExpression(pattern: "(_|\\*)(.*?)(_|\\*)", options: [])
+        if let matches = italicRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 2), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: italicFont, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let strikethroughRegex = try? NSRegularExpression(pattern: "~~(.*?)~~", options: [])
+        if let matches = strikethroughRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+                let nString = NSMutableAttributedString(string: text, attributes: [NSAttributedString.Key.font: italicFont, NSAttributedString.Key.strikethroughColor : UIColor.label, NSAttributedString.Key.strikethroughStyle : 2, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let imageBulletRegex = try? NSRegularExpression(pattern: "(\\t)*(\\*)\\[.*?\\]\\((.*?)\\)", options: [])
+        if let matches = imageBulletRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range, in: attributedString.string) else { break }
+                var text: String = String(attributedString.string[tRange])
+                text.insert("\t", at: text.startIndex)
+
+                let attachment = NSTextAttachment()
+                guard let gRange = Range(aMatch.range(at: 3), in: attributedString.string) else { break }
+                let glyphNumb = attributedString.string[gRange]
+
+                attachment.image = UIImage(named: "\(glyphNumb).png")
+                attachment.bounds = CGRect(x: 0, y: 0, width: 16, height: 16)
+                if shouldTint {
+                    attachment.image = attachment.image?.withTintColor(tColor)
+                }
+
+                let image = NSAttributedString(attachment: attachment)
+                let replacement = NSMutableAttributedString(string: text)
+                replacement.replaceCharacters(in: replacement.string.nsRange(fromRange: replacement.string.range(of: "*")!), with: image)
+                attributedString.replaceCharacters(in: aMatch.range, with: replacement)
+            }
+        }
+
+        let imageRegex = try? NSRegularExpression(pattern: "\\!\\[.*?\\]\\((.*?)\\)", options: [])
+        if let matches = imageRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                let attachment = NSTextAttachment()
+                guard let gRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let glyphNumb = attributedString.string[gRange]
+
+                attachment.image = UIImage(named: "\(glyphNumb).png")
+                attachment.bounds = CGRect(x: 0, y: 0, width: 16, height: 16)
+
+                let replacement = NSAttributedString(attachment: attachment)
+                attributedString.replaceCharacters(in: aMatch.range, with: replacement)
+
+            }
+        }
+
+        let linkRegex = try? NSRegularExpression(pattern: "\\[(.*?)\\]\\((.*?)\\)", options: [])
+        if let matches = linkRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let textRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let linkName: String = String(attributedString.string[textRange])
+                guard let linkRange = Range(aMatch.range(at: 2), in: attributedString.string) else { break }
+                let link: String = String(attributedString.string[linkRange])
+                if let url = URL(string: link) {
+                    let linkString = NSAttributedString(string: linkName, attributes: [NSAttributedString.Key.link: url, NSAttributedString.Key.font: regularFont])
+                    attributedString.replaceCharacters(in: aMatch.range, with: linkString)
+                }
+            }
+        }
+
+        let bulletRegex = try? NSRegularExpression(pattern: "(\\t)*(\\*) ", options: [])
+        if let matches = bulletRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            let tabArray: [String] = ["•"]
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range, in: attributedString.string) else { break }
+                var text: String = String(attributedString.string[tRange])
+                let count = text.prefix(while: {$0 == "\t"}).count
+                let tab: String = tabArray[count, default: "•"]
+                text.insert("\t", at: text.startIndex)
+
+                text = text.replacingOccurrences(of: "*", with: tab)
+
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: regularFont, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let numberRegex = try? NSRegularExpression(pattern: "(\\d+\\.)(.*)", options: [])
+        if let matches = numberRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range, in: attributedString.string) else { break }
+                var text: String = String(attributedString.string[tRange])
+                text.insert("\t", at: text.startIndex)
+
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: regularFont, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let header3Font = UIFont.systemFont(ofSize: fontSize * 1.7)
+        let header3Regex = try? NSRegularExpression(pattern: "### (.*?\n)", options: [])
+        if let matches = header3Regex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: header3Font, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let header2Font = UIFont.systemFont(ofSize: fontSize * 2.2)
+        let header2Regex = try? NSRegularExpression(pattern: "## (.*?\n)", options: [])
+        if let matches = header2Regex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: header2Font, NSAttributedString.Key.foregroundColor: tColor])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+
+        let header1Font = UIFont.systemFont(ofSize: fontSize * 3.2)
+        let header1Regex = try? NSRegularExpression(pattern: "# (.*?\n)", options: [])
+        if let matches = header1Regex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 1), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+
+                let nString = NSAttributedString(string: text, attributes: [NSAttributedString.Key.font: header1Font, NSAttributedString.Key.foregroundColor: UIColor.label])
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        let codeRegex = try? NSRegularExpression(pattern: "(\t)*?(\\`\\`\\`|\\`)(.*?)(\\`\\`\\`|\\`)", options: [.dotMatchesLineSeparators])
+        if let matches = codeRegex?.matches(in: attributedString.string, options: [], range: NSRange(location: 0, length: attributedString.string.utf16.count)) {
+            for aMatch in matches.reversed() {
+                guard let tRange = Range(aMatch.range(at: 3), in: attributedString.string) else { break }
+                let text: String = String(attributedString.string[tRange])
+                let attrString: NSAttributedString = NSAttributedString(string: text)
+
+                let nString = Syntax.highlightAttributedString(string: attrString, theme: theme, language: "jelly")
+                nString.addAttributes([.backgroundColor: theme.backgroundColor], range: NSRange(location: 0, length: nString.string.count))
+                attributedString.replaceCharacters(in: aMatch.range, with: nString)
+            }
+        }
+
+        return attributedString
+    }
+}