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.
63 lines
2.5 KiB
Swift
63 lines
2.5 KiB
Swift
//
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// InvertedIBeamCursorTests.swift
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// MarkdownEngineTests
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//
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// Created by Luca Chen on 30.07.26.
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//
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// The system I-beam is recolored — core → the span's ink, halo → its block —
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// so the pointer stays visible inside an inverted highlight.
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//
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import AppKit
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import Testing
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@testable import MarkdownEngine
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@MainActor
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@Suite("Inverted I-beam cursor")
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struct InvertedIBeamCursorTests {
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init() { _ = NSApplication.shared }
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/// Every opaque pixel of the largest representation, bucketed by hue.
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private func pixelCounts(_ image: NSImage) -> (ink: Int, block: Int, other: Int) {
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guard let rep = image.representations.compactMap({ $0 as? NSBitmapImageRep })
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.max(by: { $0.pixelsWide < $1.pixelsWide }) else { return (0, 0, 0) }
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var ink = 0, block = 0, other = 0
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for x in 0..<rep.pixelsWide {
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for y in 0..<rep.pixelsHigh {
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guard let px = rep.colorAt(x: x, y: y)?.usingColorSpace(.deviceRGB),
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px.alphaComponent > 0.5 else { continue }
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if px.redComponent > 0.8, px.greenComponent < 0.2 { ink += 1 }
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else if px.greenComponent > 0.8, px.redComponent < 0.2 { block += 1 }
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else { other += 1 }
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}
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}
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return (ink, block, other)
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}
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@Test("the glyph is repainted in exactly the two given colors")
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func recolorsCoreAndHalo() throws {
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let cursor = try #require(InvertedIBeamCursor.cursor(ink: .red, block: .green))
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let counts = pixelCounts(cursor.image)
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#expect(counts.ink > 0) // the core carries the shape
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#expect(counts.block > counts.ink) // the halo is the wider ring
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#expect(counts.other == 0) // nothing of the system's own colors left
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#expect(cursor.hotSpot == NSCursor.iBeam.hotSpot)
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#expect(cursor.image.size == NSCursor.iBeam.image.size)
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}
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/// Recoloring walks ~65k pixels across the 1x–10x representations, which is
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/// once per color pair and must never land on the mouse-move path.
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@Test("same colors reuse the built cursor")
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func cachesPerColorPair() throws {
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let first = try #require(InvertedIBeamCursor.cursor(ink: .black, block: .white))
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let second = try #require(InvertedIBeamCursor.cursor(ink: .black, block: .white))
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let different = try #require(InvertedIBeamCursor.cursor(ink: .white, block: .black))
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#expect(first === second)
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#expect(first !== different)
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}
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}
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