Puranjay Savar Mattas
6e1ffb96fd
Convert from git submodule to plain vendored copy. No push access to upstream nodes-app/swift-markdown-engine meant our local fix commit (05c1720) was stranded and unreachable from any remote on fresh clones/CI. Vendoring as plain files folds it into normal repo history instead.
49 lines
2.0 KiB
Swift
49 lines
2.0 KiB
Swift
//
|
|
// MarkdownStyler+TaskCheckboxes.swift
|
|
// MarkdownEngine
|
|
//
|
|
// Caret-crossing helper for GitHub-style `- [ ] / - [x]` task syntax. The
|
|
// checkbox *styling* now lives in the AST styler (`MarkdownASTStyler`); this
|
|
// only reports whether the caret sits inside the task syntax so the
|
|
// coordinator can trigger a restyle when the caret enters/leaves.
|
|
//
|
|
|
|
import AppKit
|
|
import Foundation
|
|
|
|
extension MarkdownStyler {
|
|
|
|
/// Task-list line: indent, marker (`-`/`*`/`+`/`•`/`N.` matching the AST), spacer, `[ ]`/`[x]` box.
|
|
static let taskListRegex: NSRegularExpression = try! NSRegularExpression(
|
|
pattern: #"^([ \t]*)([-•*+]|\d+\.)([ \t]+)(\[[ xX]\])(?=[ \t])"#,
|
|
options: [.anchorsMatchLines]
|
|
)
|
|
|
|
// MARK: Task Syntax Membership
|
|
|
|
/// Full `<marker><spacer>[ ]` range if `location` is inside (or at the trailing edge of) it, else nil.
|
|
static func taskSyntaxRange(at location: Int, in text: String) -> NSRange? {
|
|
let nsText = text as NSString
|
|
let safeLoc = max(0, min(location, nsText.length))
|
|
let lineRange = nsText.lineRange(for: NSRange(location: safeLoc, length: 0))
|
|
let line = nsText.substring(with: lineRange)
|
|
let match = taskListRegex.firstMatch(
|
|
in: line,
|
|
options: [],
|
|
range: NSRange(location: 0, length: line.utf16.count)
|
|
)
|
|
guard let match else { return nil }
|
|
let markerLineRange = match.range(at: 2)
|
|
let checkboxLineRange = match.range(at: 4)
|
|
guard markerLineRange.location != NSNotFound,
|
|
checkboxLineRange.location != NSNotFound else { return nil }
|
|
let syntaxStart = lineRange.location + markerLineRange.location
|
|
let syntaxEnd = lineRange.location + checkboxLineRange.location + checkboxLineRange.length
|
|
let syntaxRange = NSRange(location: syntaxStart, length: syntaxEnd - syntaxStart)
|
|
if NSLocationInRange(location, syntaxRange) || location == syntaxEnd {
|
|
return syntaxRange
|
|
}
|
|
return nil
|
|
}
|
|
}
|