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.
47 lines
1.5 KiB
Swift
47 lines
1.5 KiB
Swift
//
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// HighlightExtension.swift
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// MarkdownEngine
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//
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// Created by Luca Chen on 15.07.26.
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//
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// `==text==` highlight (Obsidian/CriticMarkup flavor) as the first inline
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// span extension. Not registered by default — the core engine parses pure
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// markdown; embedders opt in via:
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//
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// configuration.extensions = [HighlightExtension()]
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//
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// Behavior is identical to the formerly built-in construct: content gets the
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// theme's highlight background, content is re-parsed (emphasis etc. nest),
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// markers mute while the caret is inside and shrink away otherwise, and the
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// clean-copy path emits `<mark>`.
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//
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import AppKit
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import Foundation
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public struct HighlightExtension: MarkdownExtension {
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/// Well-known id, referenced by the engine's formatting actions
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/// (context menu / `applyHighlightRequest` toggle).
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public static let identifier = "highlight"
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public init() {}
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public var id: String { Self.identifier }
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public var inline: InlineSyntax? {
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InlineSyntax(open: "==", close: "==")
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}
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/// `.markdownBlockBackground`, not `.backgroundColor`: the fill covers the
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/// whole line box, so a highlight that wraps over several lines reads as
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/// one block instead of a band per line (see the key's own note).
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public func contentAttributes(theme: MarkdownEditorTheme) -> [NSAttributedString.Key: Any] {
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[.markdownBlockBackground: theme.highlightColor]
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}
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public func html(childrenHTML: String) -> String {
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"<mark>\(childrenHTML)</mark>"
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}
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}
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