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.
77 lines
3.4 KiB
Swift
77 lines
3.4 KiB
Swift
//
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// NativeTextView+TaskCheckbox.swift
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// MarkdownEngine
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//
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// Created by Luca Chen on 16.03.26.
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//
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// Hit-test for `[ ]` / `[x]` checkbox glyphs and toggle the underlying text
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// + `.taskCheckbox` attribute, then nudge the coordinator to restyle the
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// enclosing paragraph.
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//
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import AppKit
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extension NativeTextView {
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/// The drawn checkbox square under `containerPoint`, if any.
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///
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/// The `[ ]` chars are collapsed to ~zero width, so their bounding rect sits
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/// at the content edge; reconstruct the DRAWN square from the shared
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/// `TaskCheckboxGeometry` (right-aligned to it). `baseFont`, not
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/// NSTextView.font (see the draw site). `searchRange` bounds the scan —
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/// the hovered line for cursor checks, nil (whole doc) for clicks.
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func taskCheckboxHit(at containerPoint: CGPoint, in searchRange: NSRange? = nil) -> (range: NSRange, isChecked: Bool)? {
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guard let textContainer = textContainer,
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let bridge = layoutBridge,
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let storage = textStorage, storage.length > 0 else { return nil }
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let boxSize = TaskCheckboxGeometry.size(for: baseFont)
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let scan = searchRange ?? NSRange(location: 0, length: storage.length)
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var hit: (range: NSRange, isChecked: Bool)?
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storage.enumerateAttribute(.taskCheckbox, in: scan, options: []) { value, attrRange, stop in
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guard let isChecked = value as? Bool else { return }
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let anchor = bridge.boundingRect(forCharacterRange: attrRange, in: textContainer)
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let rect = CGRect(
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x: TaskCheckboxGeometry.boxX(contentX: anchor.minX, size: boxSize),
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y: anchor.minY,
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width: boxSize,
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height: max(anchor.height, boxSize)
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)
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if rect.contains(containerPoint) {
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hit = (attrRange, isChecked)
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stop.pointee = true
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}
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}
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return hit
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}
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func toggleTaskCheckboxIfHit(event: NSEvent) -> Bool? {
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guard let bridge = layoutBridge,
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let storage = textStorage else { return nil }
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let localPoint = convert(event.locationInWindow, from: nil)
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let containerPoint = CGPoint(
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x: localPoint.x - textContainerOrigin.x,
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y: localPoint.y - textContainerOrigin.y
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)
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guard let (effectiveRange, hitIsChecked) = taskCheckboxHit(at: containerPoint) else { return nil }
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let nsText = storage.string as NSString
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let checkboxText = nsText.substring(with: effectiveRange)
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guard checkboxText.range(of: #"\[[ xX]\]"#, options: .regularExpression) != nil else { return nil }
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let replacement = hitIsChecked ? "[ ]" : "[x]"
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if shouldChangeText(in: effectiveRange, replacementString: replacement) {
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storage.replaceCharacters(in: effectiveRange, with: replacement)
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storage.addAttribute(.taskCheckbox, value: !hitIsChecked, range: effectiveRange)
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storage.addAttribute(.foregroundColor, value: NSColor.clear, range: effectiveRange)
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didChangeText()
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bridge.invalidateDisplay(forCharacterRange: effectiveRange)
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if let coord = delegate as? NativeTextViewCoordinator {
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let paragraph = (storage.string as NSString).paragraphRange(for: effectiveRange)
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coord.restyleParagraphs([paragraph], in: self)
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}
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}
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return true
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}
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}
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