1efb9d172f
- 新增字体选择（系统/宋体/圆体/等宽）与暗色图片柔化配置 - 文本选择改为自定义手势+操作栏（拷贝/高亮/批注） - 添加 accessibilityIdentifier 支持自动化 UI 测试 - 新增 UITests 覆盖阅读器打开/关闭、工具栏、设置面板、批注等 - 添加 Demo 测试用 EPUB 书源（宝山辽墓材料与释读） - 新增文档：UI 自动化测试、功能开发计划、阅读器规划
778 lines
30 KiB
Swift
778 lines
30 KiB
Swift
import UIKit
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import Foundation
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#if canImport(DTCoreText)
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import DTCoreText
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#endif
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// MARK: - 文本内容视图代理
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/// 文本内容视图的代理协议
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/// 通知控制器文本选择变化和选择菜单操作
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protocol RDEPUBTextContentViewDelegate: AnyObject {
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/// 用户选中文本发生变化时调用
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func textContentView(_ contentView: RDEPUBTextContentView, didChangeSelection selection: RDEPUBSelection?)
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/// 用户从选择菜单中触发操作（拷贝/高亮/批注）
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func textContentView(
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_ contentView: RDEPUBTextContentView,
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didRequestSelectionAction action: RDEPUBAnnotationMenuAction,
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selection: RDEPUBSelection?
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)
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}
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// MARK: - 文本内容视图
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/// EPUB 流式排版的文本内容视图
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/// 支持两种渲染路径：
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/// 1. DTCoreText 路径：直接绘制到 CoreText 视图，支持精确的排版控制
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/// 2. 回退路径：通过 UITextView 的 attributedText 渲染
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///
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/// 内置能力：高亮覆盖、搜索高亮、文本选择、长按菜单、封面图显示
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final class RDEPUBTextContentView: UIView {
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private static let darkAdjustedImageCache = NSCache<NSString, UIImage>()
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private var contentInsets: UIEdgeInsets = .zero
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private var currentPage: RDEPUBTextPage?
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private var currentSelection: RDEPUBSelection?
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private var menuSelection: RDEPUBSelection?
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weak var delegate: RDEPUBTextContentViewDelegate?
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#if canImport(DTCoreText)
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private let coreTextContentView: RDEPUBTextPageRenderView = {
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let view = RDEPUBTextPageRenderView()
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view.backgroundColor = .clear
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view.isOpaque = false
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return view
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}()
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private var coreTextDisplayContent: NSAttributedString?
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private var coreTextDisplayRange: NSRange?
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#endif
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private let interactionController = RDEPUBPageInteractionController()
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private let selectionController = RDEPUBTextSelectionController()
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private let backgroundOverlayView: RDEPUBTextPageDecorationView = {
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let view = RDEPUBTextPageDecorationView()
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return view
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}()
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private let overlayView: RDEPUBTextAnnotationOverlay = {
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let view = RDEPUBTextAnnotationOverlay()
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return view
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}()
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private let textView: RDEPUBSelectableTextView = {
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let view = RDEPUBSelectableTextView()
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view.isEditable = false
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view.isScrollEnabled = false
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view.isSelectable = true
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view.backgroundColor = .clear
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view.accessibilityIdentifier = "epub.reader.selection.text"
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view.textContainerInset = .zero
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view.textContainer.lineFragmentPadding = 0
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return view
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}()
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private let coverImageView: UIImageView = {
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let view = UIImageView()
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view.contentMode = .scaleAspectFit
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view.isHidden = true
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return view
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}()
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private let pageNumberLabel: UILabel = {
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let label = UILabel()
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label.font = UIFont.systemFont(ofSize: 13)
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return label
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}()
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private lazy var selectionLongPressGesture: UILongPressGestureRecognizer = {
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let gesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(_:)))
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gesture.minimumPressDuration = 0.4
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return gesture
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}()
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private lazy var selectionTapGesture: UITapGestureRecognizer = {
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let gesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
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gesture.numberOfTapsRequired = 1
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gesture.require(toFail: selectionLongPressGesture)
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return gesture
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}()
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private lazy var selectionActionBar: UIStackView = {
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let stack = UIStackView(arrangedSubviews: [
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selectionMenuButton(title: "拷贝", action: #selector(rd_copy(_:))),
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selectionMenuButton(title: "高亮", action: #selector(rd_highlight(_:))),
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selectionMenuButton(title: "批注", action: #selector(rd_annotate(_:)))
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])
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stack.axis = .horizontal
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stack.alignment = .fill
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stack.distribution = .fillEqually
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stack.spacing = 1
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stack.backgroundColor = UIColor(white: 0.12, alpha: 0.96)
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stack.layer.cornerRadius = 10
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stack.layer.masksToBounds = true
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stack.layer.zPosition = 100
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stack.isHidden = true
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stack.accessibilityIdentifier = "epub.reader.selection.menu"
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return stack
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}()
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override init(frame: CGRect) {
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super.init(frame: frame)
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addSubview(coverImageView)
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#if canImport(DTCoreText)
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addSubview(backgroundOverlayView)
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addSubview(coreTextContentView)
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#endif
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addSubview(overlayView)
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addSubview(textView)
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addSubview(pageNumberLabel)
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addSubview(selectionActionBar)
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textView.delegate = selectionController
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textView.onSelectionAction = { [weak self] action in
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guard let self else { return }
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self.delegate?.textContentView(
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self,
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didRequestSelectionAction: action,
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selection: self.resolvedCurrentSelection()
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)
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}
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selectionController.onSelectionChanged = { [weak self] selection in
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guard let self else { return }
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if let selection {
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self.currentSelection = selection
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}
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self.delegate?.textContentView(self, didChangeSelection: selection)
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}
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addGestureRecognizer(selectionLongPressGesture)
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addGestureRecognizer(selectionTapGesture)
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if #available(iOS 16.0, *) {
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addInteraction(UIEditMenuInteraction(delegate: self))
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}
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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 var canBecomeFirstResponder: Bool { true }
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override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
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#if canImport(DTCoreText)
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switch action {
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case #selector(rd_copy(_:)),
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#selector(rd_highlight(_:)),
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#selector(rd_annotate(_:)):
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return self
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default:
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return super.target(forAction: action, withSender: sender)
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}
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#else
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return super.target(forAction: action, withSender: sender)
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#endif
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}
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override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
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#if canImport(DTCoreText)
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switch action {
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case #selector(rd_copy(_:)),
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#selector(rd_highlight(_:)),
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#selector(rd_annotate(_:)):
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return selectionController.canPerformSelectionAction(in: overlayView)
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default:
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return false
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}
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#else
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return super.canPerformAction(action, withSender: sender)
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#endif
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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#if canImport(DTCoreText)
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backgroundOverlayView.frame = bounds.inset(by: contentInsets)
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coreTextContentView.frame = bounds.inset(by: contentInsets)
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updateCoreTextLayoutFrameIfNeeded()
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#endif
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overlayView.frame = bounds.inset(by: contentInsets)
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textView.frame = bounds.inset(by: contentInsets)
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coverImageView.frame = bounds.inset(by: contentInsets)
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let labelSize = pageNumberLabel.sizeThatFits(CGSize(width: bounds.width, height: 20))
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pageNumberLabel.frame = CGRect(
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x: bounds.width - labelSize.width - 24,
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y: bounds.height - labelSize.height - 20,
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width: labelSize.width,
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height: labelSize.height
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)
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updateSelectionActionBarFrame()
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}
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func configure(
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page: RDEPUBTextPage,
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pageNumber: Int,
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totalPages: Int,
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configuration: RDEPUBReaderConfiguration,
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highlights: [RDEPUBHighlight] = [],
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searchState: RDEPUBSearchState? = nil
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) {
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currentPage = page
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currentSelection = nil
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menuSelection = nil
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hideSelectionActionBar()
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contentInsets = configuration.reflowableContentInsets
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backgroundColor = configuration.theme.contentBackgroundColor
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pageNumberLabel.textColor = configuration.theme.contentTextColor
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pageNumberLabel.text = "\(pageNumber) / \(totalPages)"
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if configureCoverIfNeeded(for: page) {
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#if canImport(DTCoreText)
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coreTextContentView.isHidden = true
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coreTextContentView.layoutFrame = nil
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coreTextDisplayContent = nil
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coreTextDisplayRange = nil
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textView.isHidden = true
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textView.isUserInteractionEnabled = false
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#endif
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textView.attributedText = nil
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textView.selectedRange = NSRange(location: 0, length: 0)
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delegate?.textContentView(self, didChangeSelection: nil)
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setNeedsLayout()
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return
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}
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coverImageView.isHidden = true
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coverImageView.image = nil
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let selectionContent = normalizedPageContent(from: page)
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let selectionRange = NSRange(location: 0, length: selectionContent.length)
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selectionContent.addAttribute(
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.foregroundColor,
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value: configuration.theme.contentTextColor,
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range: selectionRange
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)
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#if canImport(DTCoreText)
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let displayContent = darkImageAdjustedContentIfNeeded(
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normalizedPageContent(from: page),
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configuration: configuration
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)
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let fullRange = NSRange(location: 0, length: displayContent.length)
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displayContent.addAttribute(
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.foregroundColor,
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value: configuration.theme.contentTextColor,
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range: fullRange
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)
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coreTextContentView.isHidden = false
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coreTextContentView.backgroundColor = .clear
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coreTextDisplayContent = displayContent
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coreTextDisplayRange = NSRange(location: 0, length: displayContent.length)
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textView.isHidden = false
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textView.isUserInteractionEnabled = true
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textView.tintColor = configuration.theme.toolControlTextColor
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textView.attributedText = selectionProxyContent(from: selectionContent)
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textView.selectedRange = NSRange(location: 0, length: 0)
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updateSelectionInteractionMode(usingNativeTextSelection: true)
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updateCoreTextLayoutFrameIfNeeded()
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#else
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overlayView.applyHighlights(highlights, to: selectionContent, page: page, contentBaseOffset: page.pageStartOffset)
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overlayView.applySearchHighlights(to: selectionContent, page: page, searchState: searchState, contentBaseOffset: page.pageStartOffset)
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textView.isHidden = false
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textView.isUserInteractionEnabled = true
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updateSelectionInteractionMode(usingNativeTextSelection: false)
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#endif
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#if !canImport(DTCoreText)
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textView.tintColor = configuration.theme.toolControlTextColor
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textView.attributedText = selectionProxyContent(from: selectionContent)
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textView.selectedRange = NSRange(location: 0, length: 0)
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#endif
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overlayView.configure(page: page, selectionColor: overlayView.selectionColor, snapshot: interactionController.snapshot)
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#if canImport(DTCoreText)
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backgroundOverlayView.configure(page: page, selectionColor: overlayView.selectionColor, snapshot: interactionController.snapshot)
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let (bgDecorations, fgDecorations) = overlayView.buildDecorations(
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page: page,
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highlights: highlights,
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searchState: searchState,
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interactionController: interactionController
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)
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backgroundOverlayView.applyDecorations(bgDecorations)
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overlayView.applyDecorations(fgDecorations)
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#endif
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delegate?.textContentView(self, didChangeSelection: nil)
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setNeedsLayout()
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}
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func clearSelection() {
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currentSelection = nil
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menuSelection = nil
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hideSelectionActionBar()
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selectionController.clearSelection(
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textView: textView,
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overlayView: overlayView,
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backgroundOverlayView: backgroundOverlayView
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)
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}
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// MARK: - Gesture Handling
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@objc private func handleLongPress(_ gesture: UILongPressGestureRecognizer) {
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selectionController.handleLongPress(
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gesture,
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page: currentPage,
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overlayView: overlayView,
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interactionController: interactionController
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)
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if gesture.state == .ended {
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showSelectionMenuIfNeeded()
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}
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}
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@objc private func handleTap(_ gesture: UITapGestureRecognizer) {
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currentSelection = nil
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menuSelection = nil
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hideSelectionActionBar()
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selectionController.handleTap(
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textView: textView,
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overlayView: overlayView,
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backgroundOverlayView: backgroundOverlayView
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)
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}
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@objc private func rd_copy(_ sender: Any?) {
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delegate?.textContentView(self, didRequestSelectionAction: .copy, selection: resolvedCurrentSelection())
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}
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@objc private func rd_highlight(_ sender: Any?) {
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delegate?.textContentView(self, didRequestSelectionAction: .highlight, selection: resolvedCurrentSelection())
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}
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@objc private func rd_annotate(_ sender: Any?) {
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delegate?.textContentView(self, didRequestSelectionAction: .annotate, selection: resolvedCurrentSelection())
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}
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private func resolvedCurrentSelection() -> RDEPUBSelection? {
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currentSelection ?? menuSelection ?? selectionFromOverlayRange()
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}
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private func selectionFromOverlayRange() -> RDEPUBSelection? {
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guard let page = currentPage,
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let range = overlayView.selectionRange,
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range.length > 0 else {
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return nil
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}
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let source = page.chapterContent.string as NSString
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let safeRange = NSIntersectionRange(
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range,
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NSRange(location: 0, length: page.chapterContent.length)
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)
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guard safeRange.length > 0 else { return nil }
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let selectedText = source.substring(with: safeRange).trimmingCharacters(in: .whitespacesAndNewlines)
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guard !selectedText.isEmpty else { return nil }
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let chapterLength = max(page.chapterContent.length - 1, 1)
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let chapterStart = max(safeRange.location, 0)
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let chapterEnd = max(chapterStart + safeRange.length - 1, chapterStart)
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return RDEPUBSelection(
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location: RDEPUBLocation(
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href: page.href,
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progression: Double(chapterStart) / Double(chapterLength),
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lastProgression: Double(chapterEnd) / Double(chapterLength),
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fragment: nil
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),
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text: selectedText,
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rangeInfo: RDEPUBTextOffsetRangeInfo(
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href: page.href,
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start: safeRange.location,
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end: safeRange.location + safeRange.length
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).jsonString()
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)
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}
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private func showSelectionMenuIfNeeded() {
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#if canImport(DTCoreText)
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guard selectionLongPressGesture.isEnabled else { return }
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menuSelection = resolvedCurrentSelection()
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guard menuSelection != nil else { return }
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if showSelectionActionBarIfNeeded() {
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return
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}
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if #available(iOS 16.0, *),
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let editMenuInteraction = interactions.compactMap({ $0 as? UIEditMenuInteraction }).first,
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let targetRect = currentSelectionMenuTargetRect() {
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becomeFirstResponder()
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let sourcePoint = CGPoint(x: targetRect.midX, y: targetRect.midY)
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editMenuInteraction.presentEditMenu(
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with: UIEditMenuConfiguration(identifier: nil, sourcePoint: sourcePoint)
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)
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return
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}
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selectionController.showSelectionMenuIfNeeded(
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in: self,
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overlayView: overlayView,
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interactionController: interactionController,
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copyAction: #selector(RDEPUBTextContentView.rd_copy(_:)),
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highlightAction: #selector(RDEPUBTextContentView.rd_highlight(_:)),
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annotateAction: #selector(RDEPUBTextContentView.rd_annotate(_:))
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)
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#endif
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}
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private func selectionMenuButton(title: String, action: Selector) -> UIButton {
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let button = UIButton(type: .system)
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button.setTitle(title, for: .normal)
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button.setTitleColor(.white, for: .normal)
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button.titleLabel?.font = UIFont.systemFont(ofSize: 15, weight: .medium)
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button.contentEdgeInsets = UIEdgeInsets(top: 10, left: 14, bottom: 10, right: 14)
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button.backgroundColor = .clear
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button.accessibilityLabel = title
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button.accessibilityIdentifier = "epub.reader.selection.\(title)"
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button.addTarget(self, action: action, for: .touchUpInside)
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return button
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}
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private func showSelectionActionBarIfNeeded() -> Bool {
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guard currentSelectionMenuTargetRect() != nil else { return false }
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selectionActionBar.isHidden = false
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updateSelectionActionBarFrame()
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bringSubviewToFront(selectionActionBar)
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return true
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}
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private func hideSelectionActionBar() {
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selectionActionBar.isHidden = true
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}
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private func updateSelectionActionBarFrame() {
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guard !selectionActionBar.isHidden,
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let targetRect = currentSelectionMenuTargetRect() else {
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return
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}
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let fittingSize = selectionActionBar.systemLayoutSizeFitting(UIView.layoutFittingCompressedSize)
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let width = max(fittingSize.width, 168)
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let height = max(fittingSize.height, 42)
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let horizontalPadding: CGFloat = 12
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let x = min(
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max(targetRect.midX - width / 2, horizontalPadding),
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max(horizontalPadding, bounds.width - width - horizontalPadding)
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)
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let preferredY = targetRect.minY - height - 8
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let y = preferredY >= 8 ? preferredY : min(targetRect.maxY + 8, bounds.height - height - 8)
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selectionActionBar.frame = CGRect(x: x, y: max(8, y), width: width, height: height)
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}
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private func updateSelectionInteractionMode(usingNativeTextSelection: Bool) {
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selectionLongPressGesture.isEnabled = !usingNativeTextSelection
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selectionTapGesture.isEnabled = !usingNativeTextSelection
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}
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private func currentSelectionMenuTargetRect() -> CGRect? {
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guard let range = overlayView.selectionRange,
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range.length > 0,
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let anchorRect = interactionController.menuAnchorRect(for: range) else {
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return nil
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}
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return overlayView.convert(anchorRect, to: self)
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}
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private func configureCoverIfNeeded(for page: RDEPUBTextPage) -> Bool {
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guard page.pageIndexInChapter == 0,
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page.href.lowercased().contains("cover"),
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let image = coverImage(from: page.content) else {
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return false
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}
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|
||
coverImageView.image = image
|
||
coverImageView.isHidden = false
|
||
#if canImport(DTCoreText)
|
||
coreTextContentView.isHidden = true
|
||
coreTextContentView.layoutFrame = nil
|
||
coreTextDisplayContent = nil
|
||
coreTextDisplayRange = nil
|
||
textView.isHidden = true
|
||
textView.isUserInteractionEnabled = false
|
||
#endif
|
||
textView.attributedText = nil
|
||
return true
|
||
}
|
||
|
||
private func coverImage(from content: NSAttributedString) -> UIImage? {
|
||
guard content.length > 0 else { return nil }
|
||
var resolvedImage: UIImage?
|
||
content.enumerateAttribute(.attachment, in: NSRange(location: 0, length: content.length)) { value, _, stop in
|
||
guard let image = image(from: value) else { return }
|
||
resolvedImage = image
|
||
stop.pointee = true
|
||
}
|
||
return resolvedImage
|
||
}
|
||
|
||
private func image(from attachmentValue: Any?) -> UIImage? {
|
||
#if canImport(DTCoreText)
|
||
if let attachment = attachmentValue as? DTTextAttachment,
|
||
let url = attachment.contentURL {
|
||
return UIImage(contentsOfFile: url.path)
|
||
}
|
||
#endif
|
||
if let attachment = attachmentValue as? NSTextAttachment {
|
||
if let image = attachment.image {
|
||
return image
|
||
}
|
||
if let data = attachment.contents {
|
||
return UIImage(data: data)
|
||
}
|
||
if let fileWrapper = attachment.fileWrapper,
|
||
let data = fileWrapper.regularFileContents {
|
||
return UIImage(data: data)
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
#if canImport(DTCoreText)
|
||
private func darkImageAdjustedContentIfNeeded(
|
||
_ content: NSMutableAttributedString,
|
||
configuration: RDEPUBReaderConfiguration
|
||
) -> NSMutableAttributedString {
|
||
guard configuration.darkImageAdjustmentEnabled,
|
||
configuration.darkImageBlendRatio > 0,
|
||
configuration.theme.contentBackgroundColor.rd_isDarkReaderBackground else {
|
||
return content
|
||
}
|
||
|
||
let fullRange = NSRange(location: 0, length: content.length)
|
||
content.enumerateAttribute(.attachment, in: fullRange) { value, range, _ in
|
||
guard let attachment = value as? DTImageTextAttachment,
|
||
!isCoverAttachment(attachment),
|
||
let image = attachment.image,
|
||
shouldAdjustDarkImage(image) else {
|
||
return
|
||
}
|
||
|
||
let adjustedAttachment = DTImageTextAttachment()
|
||
adjustedAttachment.image = adjustedImage(
|
||
image,
|
||
backgroundColor: configuration.theme.contentBackgroundColor,
|
||
blendRatio: configuration.darkImageBlendRatio,
|
||
cacheKey: darkImageCacheKey(for: attachment, image: image, configuration: configuration)
|
||
)
|
||
adjustedAttachment.originalSize = attachment.originalSize
|
||
adjustedAttachment.displaySize = attachment.displaySize
|
||
adjustedAttachment.verticalAlignment = attachment.verticalAlignment
|
||
adjustedAttachment.contentURL = attachment.contentURL
|
||
adjustedAttachment.hyperLinkURL = attachment.hyperLinkURL
|
||
adjustedAttachment.hyperLinkGUID = attachment.hyperLinkGUID
|
||
adjustedAttachment.attributes = attachment.attributes
|
||
content.addAttribute(.attachment, value: adjustedAttachment, range: range)
|
||
}
|
||
|
||
return content
|
||
}
|
||
|
||
private func isCoverAttachment(_ attachment: DTTextAttachment) -> Bool {
|
||
let lowercasedClasses = ((attachment.attributes["class"] as? String) ?? "").lowercased()
|
||
let lowercasedPath = attachment.contentURL?.lastPathComponent.lowercased()
|
||
?? ((attachment.attributes["src"] as? String) ?? "").lowercased()
|
||
return lowercasedClasses.contains("rd-front-cover-image") || lowercasedPath.contains("cover")
|
||
}
|
||
|
||
private func shouldAdjustDarkImage(_ image: UIImage) -> Bool {
|
||
image.size.width >= 80 && image.size.height >= 80
|
||
}
|
||
|
||
private func darkImageCacheKey(
|
||
for attachment: DTImageTextAttachment,
|
||
image: UIImage,
|
||
configuration: RDEPUBReaderConfiguration
|
||
) -> NSString {
|
||
let source = attachment.contentURL?.absoluteString
|
||
?? "\(Unmanaged.passUnretained(image).toOpaque())"
|
||
return "\(source)|\(image.size.width)x\(image.size.height)|\(configuration.theme.contentBackgroundColor.ss_cssString)|\(configuration.darkImageBlendRatio)" as NSString
|
||
}
|
||
|
||
private func adjustedImage(
|
||
_ image: UIImage,
|
||
backgroundColor: UIColor,
|
||
blendRatio: CGFloat,
|
||
cacheKey: NSString
|
||
) -> UIImage {
|
||
if let cached = Self.darkAdjustedImageCache.object(forKey: cacheKey) {
|
||
return cached
|
||
}
|
||
|
||
let format = UIGraphicsImageRendererFormat()
|
||
format.scale = image.scale
|
||
format.opaque = false
|
||
let renderer = UIGraphicsImageRenderer(size: image.size, format: format)
|
||
let adjusted = renderer.image { context in
|
||
image.draw(in: CGRect(origin: .zero, size: image.size))
|
||
backgroundColor.withAlphaComponent(max(0, min(0.35, blendRatio))).setFill()
|
||
context.cgContext.setBlendMode(.sourceAtop)
|
||
context.fill(CGRect(origin: .zero, size: image.size))
|
||
}
|
||
Self.darkAdjustedImageCache.setObject(adjusted, forKey: cacheKey)
|
||
return adjusted
|
||
}
|
||
#endif
|
||
|
||
private func selectionProxyContent(from content: NSAttributedString) -> NSAttributedString {
|
||
let proxy = NSMutableAttributedString(attributedString: content)
|
||
let fullRange = NSRange(location: 0, length: proxy.length)
|
||
proxy.removeAttribute(.backgroundColor, range: fullRange)
|
||
proxy.addAttribute(.foregroundColor, value: UIColor.clear, range: fullRange)
|
||
|
||
var attachmentRanges: [NSRange] = []
|
||
proxy.enumerateAttribute(.attachment, in: fullRange) { value, range, _ in
|
||
guard value != nil else { return }
|
||
attachmentRanges.append(range)
|
||
}
|
||
|
||
for range in attachmentRanges.reversed() {
|
||
let replacement = NSAttributedString(
|
||
string: String(repeating: " ", count: max(range.length, 1)),
|
||
attributes: [
|
||
.font: proxy.attribute(.font, at: max(range.location - 1, 0), effectiveRange: nil) as Any,
|
||
.foregroundColor: UIColor.clear
|
||
]
|
||
)
|
||
proxy.replaceCharacters(in: range, with: replacement)
|
||
}
|
||
|
||
return proxy
|
||
}
|
||
|
||
private func normalizedPageContent(from page: RDEPUBTextPage) -> NSMutableAttributedString {
|
||
let content = NSMutableAttributedString(attributedString: page.content)
|
||
guard shouldNormalizeContinuationParagraph(for: page) else {
|
||
return content
|
||
}
|
||
|
||
let text = content.string as NSString
|
||
let firstParagraphRange = text.paragraphRange(for: NSRange(location: 0, length: 0))
|
||
guard firstParagraphRange.length > 0 else {
|
||
return content
|
||
}
|
||
|
||
content.enumerateAttribute(.paragraphStyle, in: firstParagraphRange) { value, range, _ in
|
||
guard let style = value as? NSParagraphStyle else { return }
|
||
let mutableStyle = (style.mutableCopy() as? NSMutableParagraphStyle) ?? NSMutableParagraphStyle()
|
||
mutableStyle.firstLineHeadIndent = mutableStyle.headIndent
|
||
mutableStyle.paragraphSpacingBefore = 0
|
||
content.addAttribute(.paragraphStyle, value: mutableStyle.copy() as Any, range: range)
|
||
}
|
||
|
||
return content
|
||
}
|
||
|
||
private func shouldNormalizeContinuationParagraph(for page: RDEPUBTextPage) -> Bool {
|
||
let pageStart = page.pageStartOffset
|
||
guard pageStart > 0, pageStart < page.chapterContent.length else {
|
||
return false
|
||
}
|
||
|
||
let chapterText = page.chapterContent.string as NSString
|
||
guard let previousScalar = UnicodeScalar(chapterText.character(at: pageStart - 1)) else {
|
||
return false
|
||
}
|
||
|
||
return !CharacterSet.newlines.contains(previousScalar)
|
||
}
|
||
|
||
#if canImport(DTCoreText)
|
||
private func updateCoreTextLayoutFrameIfNeeded() {
|
||
guard !coreTextContentView.isHidden,
|
||
let displayContent = coreTextDisplayContent,
|
||
let displayRange = coreTextDisplayRange,
|
||
let page = currentPage,
|
||
coreTextContentView.bounds.width > 0,
|
||
coreTextContentView.bounds.height > 0 else {
|
||
interactionController.configure(layoutFrame: nil, page: currentPage)
|
||
return
|
||
}
|
||
|
||
guard let layouter = DTCoreTextLayouter(attributedString: displayContent) else {
|
||
coreTextContentView.layoutFrame = nil
|
||
interactionController.configure(layoutFrame: nil, page: page)
|
||
return
|
||
}
|
||
layouter.shouldCacheLayoutFrames = false
|
||
let layoutFrame = layouter.layoutFrame(with: coreTextContentView.bounds, range: displayRange)
|
||
coreTextContentView.layoutFrame = layoutFrame
|
||
interactionController.configure(layoutFrame: layoutFrame, page: page)
|
||
overlayView.updateSnapshot(interactionController.snapshot)
|
||
backgroundOverlayView.updateSnapshot(interactionController.snapshot)
|
||
}
|
||
#endif
|
||
|
||
}
|
||
|
||
@available(iOS 16.0, *)
|
||
extension RDEPUBTextContentView: UIEditMenuInteractionDelegate {
|
||
func editMenuInteraction(
|
||
_ interaction: UIEditMenuInteraction,
|
||
menuFor configuration: UIEditMenuConfiguration,
|
||
suggestedActions: [UIMenuElement]
|
||
) -> UIMenu? {
|
||
guard resolvedCurrentSelection() != nil else { return nil }
|
||
|
||
return UIMenu(children: [
|
||
UIAction(title: "拷贝") { [weak self] _ in
|
||
guard let self else { return }
|
||
self.delegate?.textContentView(
|
||
self,
|
||
didRequestSelectionAction: .copy,
|
||
selection: self.resolvedCurrentSelection()
|
||
)
|
||
},
|
||
UIAction(title: "高亮") { [weak self] _ in
|
||
guard let self else { return }
|
||
self.delegate?.textContentView(
|
||
self,
|
||
didRequestSelectionAction: .highlight,
|
||
selection: self.resolvedCurrentSelection()
|
||
)
|
||
},
|
||
UIAction(title: "批注") { [weak self] _ in
|
||
guard let self else { return }
|
||
self.delegate?.textContentView(
|
||
self,
|
||
didRequestSelectionAction: .annotate,
|
||
selection: self.resolvedCurrentSelection()
|
||
)
|
||
}
|
||
])
|
||
}
|
||
|
||
func editMenuInteraction(
|
||
_ interaction: UIEditMenuInteraction,
|
||
targetRectFor configuration: UIEditMenuConfiguration
|
||
) -> CGRect {
|
||
currentSelectionMenuTargetRect() ?? bounds
|
||
}
|
||
}
|
||
|
||
private extension UIColor {
|
||
var rd_isDarkReaderBackground: Bool {
|
||
var red: CGFloat = 0
|
||
var green: CGFloat = 0
|
||
var blue: CGFloat = 0
|
||
var alpha: CGFloat = 0
|
||
guard getRed(&red, green: &green, blue: &blue, alpha: &alpha) else {
|
||
return false
|
||
}
|
||
let luminance = 0.2126 * red + 0.7152 * green + 0.0722 * blue
|
||
return luminance < 0.35
|
||
}
|
||
}
|