wehub-resource-sync
54 lines
1.9 KiB
Swift
54 lines
1.9 KiB
Swift
import Foundation
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/// A file's line-ending style. The editor always keeps its buffer in LF
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/// internally (so `BlockParser`'s `\n` split is clean and no stray `\r`
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/// characters leak into block content); the original style is remembered so
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/// it can be written back on save without silently changing the user's file.
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public enum LineEnding: String, Sendable {
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case lf // "\n"
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case crlf // "\r\n"
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case cr // "\r"
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/// The literal character sequence for this line ending.
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public var string: String {
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switch self {
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case .lf: return "\n"
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case .crlf: return "\r\n"
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case .cr: return "\r"
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}
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}
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/// Short label for display in the status bar.
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public var displayName: String {
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switch self {
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case .lf: return "LF"
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case .crlf: return "CRLF"
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case .cr: return "CR"
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}
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}
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/// Detects the line ending used in `text`. CRLF is checked before CR/LF
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/// because it contains both. Defaults to `.lf` when there are no breaks.
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public static func detect(in text: String) -> LineEnding {
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if text.contains("\r\n") { return .crlf }
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if text.contains("\r") { return .cr }
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return .lf
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}
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/// Whether `text` mixes more than one line-ending style (e.g. some CRLF and
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/// some LF) — the case the "inconsistent line endings" warning flags.
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public static func isInconsistent(in text: String) -> Bool {
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let hasCRLF = text.contains("\r\n")
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let withoutCRLF = text.replacingOccurrences(of: "\r\n", with: "")
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let hasCR = withoutCRLF.contains("\r")
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let hasLF = withoutCRLF.contains("\n")
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return [hasCRLF, hasCR, hasLF].filter { $0 }.count > 1
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}
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/// Converts every line ending in `text` to LF (`\n`).
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public static func normalize(_ text: String) -> String {
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text.replacingOccurrences(of: "\r\n", with: "\n")
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.replacingOccurrences(of: "\r", with: "\n")
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}
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}
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