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.
58 lines
2.6 KiB
Swift
58 lines
2.6 KiB
Swift
//
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// NativeTextView+ClickRemap.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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// Single-click hit-testing inside paragraph spacing: pick the closer of the
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// current fragment's last line vs. the next fragment's first line and place
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// the caret at a line-relative X within the chosen line.
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//
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import AppKit
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extension NativeTextView {
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func remapClickInParagraphSpacing(event: NSEvent) -> Bool {
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guard event.clickCount == 1, !event.modifierFlags.contains(.shift),
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let tlm = textLayoutManager, let tcs = textContentStorage else {
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return false
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}
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let viewPoint = convert(event.locationInWindow, from: nil)
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let click = CGPoint(
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x: viewPoint.x - textContainerOrigin.x,
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y: viewPoint.y - textContainerOrigin.y
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)
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guard let fragment = tlm.textLayoutFragment(for: click),
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let lastLine = fragment.textLineFragments.last else {
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return false
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}
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let fragFrame = fragment.layoutFragmentFrame
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let lastLineMaxY = fragFrame.minY + lastLine.typographicBounds.maxY
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guard click.y > lastLineMaxY, click.y <= fragFrame.maxY else { return false }
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var nextFragment: NSTextLayoutFragment?
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tlm.enumerateTextLayoutFragments(
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from: fragment.rangeInElement.endLocation, options: [.ensuresLayout]
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) { nextFragment = $0; return false }
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let nextFirst = nextFragment?.textLineFragments.first
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let nextTopY = nextFirst.map { nextFragment!.layoutFragmentFrame.minY + $0.typographicBounds.minY } ?? fragFrame.maxY
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let useLower = (nextTopY - click.y) < (click.y - lastLineMaxY) && nextFirst != nil
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let chosenFragment = useLower ? nextFragment! : fragment
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let chosenLine = useLower ? nextFirst! : lastLine
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let lineTypo = chosenLine.typographicBounds
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let lineLocal = CGPoint(
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x: click.x - chosenFragment.layoutFragmentFrame.minX - lineTypo.minX,
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y: lineTypo.midY - lineTypo.minY
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)
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let charIdx = chosenLine.characterIndex(for: lineLocal)
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let lineStart = chosenLine.characterRange.location
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let clampedInFrag = max(lineStart, min(lineStart + chosenLine.characterRange.length, charIdx))
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let fragStart = tcs.offset(from: tcs.documentRange.location, to: chosenFragment.rangeInElement.location)
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guard fragStart != NSNotFound else { return false }
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let docLen = (string as NSString).length
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window?.makeFirstResponder(self)
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setSelectedRange(NSRange(location: min(max(fragStart + clampedInFrag, 0), docLen), length: 0))
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return true
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}
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}
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