65 lines
1.9 KiB
Swift
65 lines
1.9 KiB
Swift
//
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// TableOfContentsView.swift
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// Gemini-iOS
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//
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// Created by Shadowfacts on 12/20/20.
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//
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import SwiftUI
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import GeminiFormat
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struct TableOfContentsView: View {
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private let entries: [Entry]
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private let close: (Int?) -> Void
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init(document: Document, close: @escaping (Int?) -> Void) {
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let toc = TableOfContents(document: document)
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self.entries = toc.entries.flatMap { TableOfContentsView.flattenToCEntry($0) }
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self.close = close
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}
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private static func flattenToCEntry(_ e: TableOfContents.Entry, depth: Int = 0) -> [Entry] {
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guard case let .heading(text, level: _) = e.line else { fatalError() }
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var entries = e.children.flatMap {
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flattenToCEntry($0, depth: depth + 1)
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}
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entries.insert(Entry(title: text, lineIndex: e.lineIndex, depth: depth), at: 0)
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return entries
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}
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var body: some View {
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NavigationView {
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List(Array(entries.enumerated()), id: \.0) { (a) in
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Button {
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close(a.1.lineIndex)
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} label: {
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HStack(spacing: 0) {
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Spacer()
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.frame(width: CGFloat(a.1.depth * 25))
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Text(verbatim: a.1.title)
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}
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}
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}
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.listStyle(PlainListStyle())
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.navigationBarTitle("Table of Contents", displayMode: .inline)
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.navigationBarItems(trailing: Button("Done", action: {
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close(nil)
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}))
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}
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}
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}
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extension TableOfContentsView {
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struct Entry {
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let title: String
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let lineIndex: Int
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let depth: Int
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}
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}
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struct TableOfContentsView_Previews: PreviewProvider {
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static var previews: some View {
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TableOfContentsView(document: Document(url: URL(string: "gemini://example.com")!, lines: [])) { (_) in }
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}
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}
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