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| 1 | +import SwiftUI |
| 2 | + |
| 3 | +@available(*, deprecated, message: "This view has been moved to the https://github.com/danielsaidi/TextReplacementView repository.") |
| 4 | +public struct TextReplacement: View { |
| 5 | + |
| 6 | + /// Create a replacement view with a single replacement. |
| 7 | + public init( |
| 8 | + _ text: String, |
| 9 | + replace: String, |
| 10 | + with replacement: @escaping (String) -> Text |
| 11 | + ) { |
| 12 | + self.init(text, replacements: [replace: replacement]) |
| 13 | + } |
| 14 | + |
| 15 | + /// Create a replacement view with multiple replacements. |
| 16 | + public init( |
| 17 | + _ text: String, |
| 18 | + replacements: [String: (String) -> Text] |
| 19 | + ) { |
| 20 | + self.content = TextReplacement.processReplacements( |
| 21 | + in: text, |
| 22 | + with: replacements |
| 23 | + ) |
| 24 | + } |
| 25 | + |
| 26 | + private let content: Text |
| 27 | + |
| 28 | + public var body: some View { |
| 29 | + content |
| 30 | + } |
| 31 | + |
| 32 | + /// Process the replacements in a deterministic way |
| 33 | + private static func processReplacements( |
| 34 | + in text: String, |
| 35 | + with replacements: [String: (String) -> Text] |
| 36 | + ) -> Text { |
| 37 | + |
| 38 | + // Create a structure to track replacement positions |
| 39 | + struct Replacement { |
| 40 | + let range: Range<String.Index> |
| 41 | + let pattern: String |
| 42 | + let replacementFunc: (String) -> Text |
| 43 | + } |
| 44 | + |
| 45 | + // Find all occurrences of all patterns |
| 46 | + var allReplacements: [Replacement] = [] |
| 47 | + |
| 48 | + // Find text ranges for all specified replacements |
| 49 | + for (pattern, replacementFunc) in replacements { |
| 50 | + var searchRange = text.startIndex..<text.endIndex |
| 51 | + |
| 52 | + while let range = text.range(of: pattern, range: searchRange) { |
| 53 | + allReplacements.append(Replacement( |
| 54 | + range: range, |
| 55 | + pattern: pattern, |
| 56 | + replacementFunc: replacementFunc |
| 57 | + )) |
| 58 | + searchRange = range.upperBound..<text.endIndex |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + // Sort replacements by position, then by length |
| 63 | + // Longer patterns are handled first to handle overlaps |
| 64 | + allReplacements.sort { first, second in |
| 65 | + if first.range.lowerBound != second.range.lowerBound { |
| 66 | + return first.range.lowerBound < second.range.lowerBound |
| 67 | + } |
| 68 | + return first.pattern.count > second.pattern.count |
| 69 | + } |
| 70 | + |
| 71 | + // Process the text with non-overlapping replacements |
| 72 | + var result = Text("") |
| 73 | + var currentIndex = text.startIndex |
| 74 | + |
| 75 | + // Remove overlapping replacements |
| 76 | + var validReplacements: [Replacement] = [] |
| 77 | + var lastEnd: String.Index? |
| 78 | + |
| 79 | + for replacement in allReplacements { |
| 80 | + if let lastEnd = lastEnd, replacement.range.lowerBound < lastEnd { |
| 81 | + continue // Skip overlapping replacement |
| 82 | + } |
| 83 | + validReplacements.append(replacement) |
| 84 | + lastEnd = replacement.range.upperBound |
| 85 | + } |
| 86 | + |
| 87 | + // Apply the valid replacements |
| 88 | + for replacement in validReplacements { |
| 89 | + // Add text before the replacement |
| 90 | + if currentIndex < replacement.range.lowerBound { |
| 91 | + let beforeText = text[currentIndex..<replacement.range.lowerBound] |
| 92 | + result = result + Text(String(beforeText)) |
| 93 | + } |
| 94 | + |
| 95 | + // Add the replacement |
| 96 | + result = result + replacement.replacementFunc(replacement.pattern) |
| 97 | + currentIndex = replacement.range.upperBound |
| 98 | + } |
| 99 | + |
| 100 | + // Add any remaining text |
| 101 | + if currentIndex < text.endIndex { |
| 102 | + let remainingText = text[currentIndex..<text.endIndex] |
| 103 | + result = result + Text(String(remainingText)) |
| 104 | + } |
| 105 | + |
| 106 | + return result |
| 107 | + } |
| 108 | +} |
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