325 lines
14 KiB
Swift
325 lines
14 KiB
Swift
import UIKit
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// MARK: - 设置面板
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/// EPUB 阅读器的设置面板控制器
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/// 提供亮度、字号、行距、翻页方式、主题的调节功能
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/// 支持 iOS 13+ SF Symbols 和低版本文字回退
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final class RDEPUBReaderSettingsViewController: UIViewController {
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// MARK: 回调闭包
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/// 亮度变化回调（0.0 ~ 1.0）
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var onBrightnessChange: ((CGFloat) -> Void)?
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/// 字号变化回调（pt 值）
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var onFontSizeChange: ((CGFloat) -> Void)?
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/// 行距倍数变化回调
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var onLineHeightChange: ((CGFloat) -> Void)?
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/// 栏数变化回调
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var onColumnCountChange: ((Int) -> Void)?
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/// 翻页模式变化回调
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var onDisplayTypeChange: ((RDReaderView.DisplayType) -> Void)?
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/// 主题变化回调
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var onThemeChange: ((RDEPUBReaderTheme) -> Void)?
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// MARK: 主题预设枚举
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/// 设置面板中的主题预设枚举，用于按钮显示和主题切换
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private enum ThemePreset: Int, CaseIterable {
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case light
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case yellow
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case green
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case pink
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case blue
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case dark
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var title: String {
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switch self {
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case .light: return "浅色"
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case .yellow: return "米黄"
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case .green: return "青绿"
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case .pink: return "粉色"
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case .blue: return "蓝灰"
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case .dark: return "夜间"
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}
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}
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var theme: RDEPUBReaderTheme {
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switch self {
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case .light: return .light
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case .yellow: return .yellow
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case .green: return .green
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case .pink: return .pink
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case .blue: return .blue
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case .dark: return .dark
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}
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}
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}
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private let scrollView = UIScrollView()
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private let contentStack: UIStackView = {
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let stackView = UIStackView()
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stackView.axis = .vertical
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stackView.spacing = 20
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return stackView
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}()
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private let brightnessSlider = UISlider()
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private let fontValueLabel = UILabel()
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private let decreaseFontButton = UIButton(type: .system)
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private let increaseFontButton = UIButton(type: .system)
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private let lineHeightControl = UISegmentedControl(items: ["紧凑", "标准", "宽松"])
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private let columnCountControl = UISegmentedControl(items: ["单栏", "双栏"])
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private let displayTypeControl = UISegmentedControl(items: ["仿真", "横滑", "竖滑"])
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private let themeStackView: UIStackView = {
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let stackView = UIStackView()
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stackView.axis = .horizontal
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stackView.distribution = .fillEqually
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stackView.spacing = 12
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return stackView
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}()
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private var themeButtons: [UIButton] = []
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/// 行距选项对应的倍数值（紧凑 1.3、标准 1.6、宽松 1.9）
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private let lineHeightValues: [CGFloat] = [1.3, 1.6, 1.9]
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/// 当前配置的本地副本，修改后通过回调通知控制器
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private var currentConfiguration: RDEPUBReaderConfiguration
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init(configuration: RDEPUBReaderConfiguration, brightness: CGFloat) {
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self.currentConfiguration = configuration
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super.init(nibName: nil, bundle: nil)
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brightnessSlider.value = Float(brightness)
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title = "样式设置"
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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setupNavigationItems()
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setupViews()
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syncControls()
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applyTheme(currentConfiguration.theme)
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}
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private func setupNavigationItems() {
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navigationItem.rightBarButtonItem = UIBarButtonItem(title: "完成", style: .done, target: self, action: #selector(doneAction))
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}
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private func setupViews() {
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view.addSubview(scrollView)
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scrollView.translatesAutoresizingMaskIntoConstraints = false
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scrollView.addSubview(contentStack)
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contentStack.translatesAutoresizingMaskIntoConstraints = false
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NSLayoutConstraint.activate([
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scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
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scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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contentStack.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor, constant: 16),
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contentStack.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor, constant: -16),
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contentStack.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 20),
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contentStack.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor, constant: -24),
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contentStack.widthAnchor.constraint(equalTo: scrollView.widthAnchor, constant: -32)
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])
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brightnessSlider.minimumValue = 0
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brightnessSlider.maximumValue = 1
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brightnessSlider.addTarget(self, action: #selector(brightnessChanged(_:)), for: .valueChanged)
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fontValueLabel.font = UIFont.monospacedDigitSystemFont(ofSize: 16, weight: .semibold)
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fontValueLabel.textAlignment = .center
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fontValueLabel.setContentHuggingPriority(.required, for: .horizontal)
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configureFontButton(decreaseFontButton, title: "A-")
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configureFontButton(increaseFontButton, title: "A+")
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decreaseFontButton.addTarget(self, action: #selector(decreaseFontAction), for: .touchUpInside)
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increaseFontButton.addTarget(self, action: #selector(increaseFontAction), for: .touchUpInside)
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lineHeightControl.addTarget(self, action: #selector(lineHeightChanged(_:)), for: .valueChanged)
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columnCountControl.addTarget(self, action: #selector(columnCountChanged(_:)), for: .valueChanged)
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displayTypeControl.addTarget(self, action: #selector(displayTypeChanged(_:)), for: .valueChanged)
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ThemePreset.allCases.forEach { preset in
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let button = UIButton(type: .system)
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button.tag = preset.rawValue
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button.layer.cornerRadius = 18
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button.layer.borderWidth = 1.5
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button.backgroundColor = preset.theme.contentBackgroundColor
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button.accessibilityLabel = preset.title
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button.addTarget(self, action: #selector(themeButtonAction(_:)), for: .touchUpInside)
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themeButtons.append(button)
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themeStackView.addArrangedSubview(button)
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NSLayoutConstraint.activate([
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button.heightAnchor.constraint(equalToConstant: 36)
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])
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}
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contentStack.addArrangedSubview(makeSection(title: "亮度", content: brightnessSlider))
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contentStack.addArrangedSubview(makeSection(title: "字号", content: makeFontSizeRow()))
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contentStack.addArrangedSubview(makeSection(title: "行距", content: lineHeightControl))
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contentStack.addArrangedSubview(makeSection(title: "分栏", content: columnCountControl))
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contentStack.addArrangedSubview(makeSection(title: "翻页方式", content: displayTypeControl))
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contentStack.addArrangedSubview(makeSection(title: "主题", content: themeStackView))
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}
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private func makeSection(title: String, content: UIView) -> UIView {
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let container = UIStackView()
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container.axis = .vertical
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container.spacing = 10
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let titleLabel = UILabel()
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titleLabel.text = title
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titleLabel.font = UIFont.systemFont(ofSize: 14, weight: .semibold)
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content.translatesAutoresizingMaskIntoConstraints = false
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container.addArrangedSubview(titleLabel)
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container.addArrangedSubview(content)
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return container
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}
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private func makeFontSizeRow() -> UIView {
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let stackView = UIStackView(arrangedSubviews: [decreaseFontButton, fontValueLabel, increaseFontButton])
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stackView.axis = .horizontal
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stackView.alignment = .center
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stackView.distribution = .fill
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stackView.spacing = 12
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NSLayoutConstraint.activate([
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decreaseFontButton.widthAnchor.constraint(equalToConstant: 64),
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increaseFontButton.widthAnchor.constraint(equalToConstant: 64),
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decreaseFontButton.heightAnchor.constraint(equalToConstant: 36),
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increaseFontButton.heightAnchor.constraint(equalToConstant: 36)
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])
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return stackView
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}
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private func configureFontButton(_ button: UIButton, title: String) {
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button.setTitle(title, for: .normal)
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button.titleLabel?.font = UIFont.systemFont(ofSize: 16, weight: .semibold)
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button.layer.cornerRadius = 18
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button.layer.borderWidth = 1
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}
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private func syncControls() {
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fontValueLabel.text = String(Int(currentConfiguration.fontSize.rounded()))
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let lineHeightIndex = lineHeightValues.enumerated().min { abs($0.element - currentConfiguration.lineHeightMultiple) < abs($1.element - currentConfiguration.lineHeightMultiple) }?.offset ?? 1
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lineHeightControl.selectedSegmentIndex = lineHeightIndex
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columnCountControl.selectedSegmentIndex = currentConfiguration.numberOfColumns > 1 ? 1 : 0
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switch currentConfiguration.displayType {
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case .pageCurl:
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displayTypeControl.selectedSegmentIndex = 0
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case .horizontalScroll:
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displayTypeControl.selectedSegmentIndex = 1
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case .verticalScroll:
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displayTypeControl.selectedSegmentIndex = 2
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}
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let selectedPreset = ThemePreset.allCases.first(where: { $0.theme == currentConfiguration.theme }) ?? .light
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updateThemeSelection(selectedPreset)
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}
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private func applyTheme(_ theme: RDEPUBReaderTheme) {
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view.backgroundColor = theme.contentBackgroundColor
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scrollView.backgroundColor = theme.contentBackgroundColor
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contentStack.arrangedSubviews
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.compactMap { $0 as? UIStackView }
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.flatMap { $0.arrangedSubviews }
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.compactMap { $0 as? UILabel }
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.forEach { $0.textColor = theme.contentTextColor }
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fontValueLabel.textColor = theme.contentTextColor
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[decreaseFontButton, increaseFontButton].forEach { button in
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button.setTitleColor(theme.toolControlTextColor, for: .normal)
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button.layer.borderColor = theme.toolControlBorderUnselectColor.cgColor
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button.backgroundColor = theme.toolBackgroundColor
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}
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[lineHeightControl, columnCountControl, displayTypeControl].forEach { control in
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control.backgroundColor = theme.toolBackgroundColor
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if #available(iOS 13.0, *) {
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control.selectedSegmentTintColor = theme.toolControlTextColor.withAlphaComponent(0.14)
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} else {
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control.tintColor = theme.toolControlTextColor
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}
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control.setTitleTextAttributes([.foregroundColor: theme.contentTextColor], for: .normal)
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control.setTitleTextAttributes([.foregroundColor: theme.toolControlTextColor], for: .selected)
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}
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navigationController?.navigationBar.tintColor = theme.toolControlTextColor
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navigationController?.navigationBar.barTintColor = theme.toolBackgroundColor
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navigationController?.navigationBar.titleTextAttributes = [.foregroundColor: theme.toolControlTextColor]
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updateThemeSelection(ThemePreset.allCases.first(where: { $0.theme == theme }) ?? .light)
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}
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private func updateThemeSelection(_ preset: ThemePreset) {
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themeButtons.forEach { button in
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let isSelected = button.tag == preset.rawValue
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button.layer.borderWidth = isSelected ? 2 : 1
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button.layer.borderColor = isSelected ? currentConfiguration.theme.toolControlTextColor.cgColor : currentConfiguration.theme.toolControlBorderUnselectColor.cgColor
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}
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}
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@objc private func doneAction() {
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dismiss(animated: true)
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}
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@objc private func brightnessChanged(_ slider: UISlider) {
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onBrightnessChange?(CGFloat(slider.value))
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}
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@objc private func decreaseFontAction() {
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let nextValue = max(12, currentConfiguration.fontSize - 1)
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guard nextValue != currentConfiguration.fontSize else { return }
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currentConfiguration.fontSize = nextValue
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fontValueLabel.text = String(Int(nextValue.rounded()))
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onFontSizeChange?(nextValue)
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}
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@objc private func increaseFontAction() {
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let nextValue = min(36, currentConfiguration.fontSize + 1)
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guard nextValue != currentConfiguration.fontSize else { return }
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currentConfiguration.fontSize = nextValue
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fontValueLabel.text = String(Int(nextValue.rounded()))
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onFontSizeChange?(nextValue)
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}
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@objc private func lineHeightChanged(_ control: UISegmentedControl) {
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let index = max(0, min(control.selectedSegmentIndex, lineHeightValues.count - 1))
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let value = lineHeightValues[index]
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currentConfiguration.lineHeightMultiple = value
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onLineHeightChange?(value)
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}
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@objc private func columnCountChanged(_ control: UISegmentedControl) {
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let numberOfColumns = control.selectedSegmentIndex == 1 ? 2 : 1
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currentConfiguration.numberOfColumns = numberOfColumns
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onColumnCountChange?(numberOfColumns)
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}
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@objc private func displayTypeChanged(_ control: UISegmentedControl) {
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let displayType: RDReaderView.DisplayType
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switch control.selectedSegmentIndex {
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case 1:
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displayType = .horizontalScroll
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case 2:
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displayType = .verticalScroll
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default:
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displayType = .pageCurl
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}
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currentConfiguration.displayType = displayType
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onDisplayTypeChange?(displayType)
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}
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@objc private func themeButtonAction(_ sender: UIButton) {
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guard let preset = ThemePreset(rawValue: sender.tag) else { return }
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currentConfiguration.theme = preset.theme
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applyTheme(preset.theme)
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onThemeChange?(preset.theme)
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}
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}
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