504 lines
17 KiB
Swift
504 lines
17 KiB
Swift
import UIKit
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public final class RDEPUBReaderController: UIViewController {
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public weak var delegate: RDEPUBReaderDelegate?
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public var configuration: RDEPUBReaderConfiguration {
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didSet {
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// M-09: Apply all configuration side effects even before view is loaded,
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// but UI-dependent actions only after view is loaded.
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readerContext.configuration = configuration
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guard isViewLoaded else { return }
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applyWebViewDebugPolicy()
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persistReaderSettingsIfNeeded()
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let oldConfiguration = oldValue
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applyReaderViewConfiguration()
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if isExternalTextBook {
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if requiresRepagination(from: oldConfiguration, to: configuration) {
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rebuildExternalTextBook()
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} else if requiresVisibleRefresh(from: oldConfiguration, to: configuration) {
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refreshVisibleContentPreservingLocation()
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}
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return
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}
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guard publication != nil else { return }
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if requiresRepagination(from: oldConfiguration, to: configuration) {
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repaginatePreservingCurrentLocation()
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} else if requiresVisibleRefresh(from: oldConfiguration, to: configuration) {
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refreshVisibleContentPreservingLocation()
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}
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}
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}
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public var currentLocation: RDEPUBLocation? {
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currentVisibleLocation()
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}
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public var currentPageNumber: Int? {
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guard readerView.currentPage >= 0 else { return nil }
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return readerView.currentPage + 1
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}
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public internal(set) var currentSelection: RDEPUBSelection? {
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get { readerContext.currentSelection }
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set { readerContext.currentSelection = newValue }
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}
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public var highlights: [RDEPUBHighlight] {
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activeHighlights
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}
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public var bookmarks: [RDEPUBBookmark] {
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activeBookmarks
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}
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public var annotations: [RDEPUBAnnotation] {
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let merged = activeHighlights.map(\.annotation) + activeBookmarks.map(\.annotation)
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return merged.sorted { $0.createdAt < $1.createdAt }
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}
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public var tableOfContents: [EPUBTableOfContentsItem] {
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publication?.tableOfContents ?? []
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}
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public var flattenedTableOfContents: [RDEPUBReaderTableOfContentsItem] {
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guard let publication else { return [] }
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return flattenedTableOfContentsItems(from: publication.tableOfContents)
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}
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public var currentTableOfContentsItem: RDEPUBReaderTableOfContentsItem? {
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resolvedCurrentTableOfContentsItem()
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}
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let epubURL: URL
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let persistence: RDEPUBReaderPersistence?
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let dependencies: RDEPUBReaderDependencies
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let readerView = RDEpubReaderView()
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let loadingIndicator: UIActivityIndicatorView = {
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UIActivityIndicatorView(style: .large)
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}()
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let errorLabel: UILabel = {
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let label = UILabel()
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label.numberOfLines = 0
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label.textAlignment = .center
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label.textColor = .darkGray
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label.isHidden = true
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return label
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}()
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let paginationHostView = UIView()
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/// Chapter-level shared display content/layouter for text pages
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/// (LONG_CHAPTER_MEMORY_OPTIMIZATION_PLAN.md P1-1/P1-3).
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let textDisplayCache = RDEPUBChapterDisplayContentCache()
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lazy var readerContext = RDEPUBReaderContext(controller: self)
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var parser: RDEPUBParser? {
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get { readerContext.parser }
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set { readerContext.parser = newValue }
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}
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var publication: RDEPUBPublication? {
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get { readerContext.publication }
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set { readerContext.publication = newValue }
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}
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var readingSession: RDEPUBReadingSession? {
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get { readerContext.readingSession }
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set { readerContext.readingSession = newValue }
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}
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var textBook: RDEPUBTextBook? {
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get { readerContext.textBook }
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set { readerContext.textBook = newValue }
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}
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var activePages: [EPUBPage] {
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readerContext.activePages
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}
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var activeChapters: [EPUBChapterInfo] {
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readerContext.activeChapters
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}
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var activeBookmarks: [RDEPUBBookmark] {
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get { readerContext.activeBookmarks }
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set { readerContext.activeBookmarks = newValue }
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}
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var activeHighlights: [RDEPUBHighlight] {
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get { readerContext.activeHighlights }
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set { readerContext.activeHighlights = newValue }
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}
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lazy var topToolView = runtime.makeTopToolView()
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lazy var bottomToolView = runtime.makeBottomToolView()
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lazy var searchBarView = RDEPUBReaderSearchBarView()
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/// 试读墙视图缓存（经 delegate 获取一次后复用；见 RDEPUBReaderController+Trial）
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var cachedTrialWallView: UIView?
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/// 阅读器进入前宿主导航栏的真实状态。详情页使用自定义导航栏时系统栏原本
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/// 就是隐藏的，退出阅读器必须恢复该状态，不能无条件显示系统导航栏。
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private var navigationBarHiddenBeforeReader: Bool?
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private(set) var isSearchBarVisible = false
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var currentBookIdentifier: String? {
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get { readerContext.currentBookIdentifier }
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set { readerContext.currentBookIdentifier = newValue }
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}
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var textBookCache: RDEPUBTextBookCache { readerContext.textBookCache }
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var currentBrightness: CGFloat {
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get { readerContext.currentBrightness }
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set { readerContext.currentBrightness = newValue }
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}
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var didStartInitialLoad: Bool {
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get { readerContext.didStartInitialLoad }
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set { readerContext.didStartInitialLoad = newValue }
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}
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var isRepaginating: Bool {
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get { readerContext.isRepaginating }
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set { readerContext.isRepaginating = newValue }
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}
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var lastTextPaginationPageSize: CGSize? {
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get { readerContext.lastTextPaginationPageSize }
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set { readerContext.lastTextPaginationPageSize = newValue }
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}
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var isReconcilingTextPaginationSize = false
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var paginationToken: UUID {
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get { readerContext.paginationToken }
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set { readerContext.paginationToken = newValue }
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}
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var searchState: RDEPUBSearchState? {
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get { readerContext.searchState }
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set { readerContext.searchState = newValue }
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}
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var isExternalTextBook: Bool {
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get { readerContext.isExternalTextBook }
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set { readerContext.isExternalTextBook = newValue }
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}
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var textFileURL: URL? {
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get { readerContext.textFileURL }
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set { readerContext.textFileURL = newValue }
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}
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lazy var readerAssemblyCoordinator = RDEPUBReaderAssemblyCoordinator(context: readerContext)
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lazy var runtime = RDEPUBReaderRuntime(context: readerContext)
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public init(
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epubURL: URL,
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configuration: RDEPUBReaderConfiguration = .default,
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persistence: RDEPUBReaderPersistence? = RDEPUBUserDefaultsPersistence(),
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dependencies: RDEPUBReaderDependencies = .live
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) {
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let persistedSettings = persistence?.loadReaderSettings()
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self.epubURL = epubURL
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self.configuration = persistedSettings?.applying(to: configuration) ?? configuration
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self.persistence = persistence
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self.dependencies = dependencies
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let brightness = max(0, min(1, persistedSettings?.brightness ?? dependencies.environment.currentBrightness))
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super.init(nibName: nil, bundle: nil)
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readerContext.dependencies = dependencies
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readerContext.configuration = self.configuration
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readerContext.epubURL = epubURL
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readerContext.persistence = persistence
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self.currentBrightness = brightness
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applyWebViewDebugPolicy()
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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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private func applyWebViewDebugPolicy() {
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RDEPUBWebViewDebug.applyDebugPolicy(
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inspectableEnabled: configuration.allowsInspectableWebViews,
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verboseLoggingEnabled: configuration.enablesVerboseWebViewLogging
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)
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}
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public convenience init(
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textBook: RDEPUBTextBook,
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bookIdentifier: String,
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title: String,
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textFileURL: URL? = nil,
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configuration: RDEPUBReaderConfiguration = .default,
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persistence: RDEPUBReaderPersistence? = RDEPUBUserDefaultsPersistence(),
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dependencies: RDEPUBReaderDependencies = .live
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) {
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let persistedSettings = persistence?.loadReaderSettings()
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let resolvedConfig = persistedSettings?.applying(to: configuration) ?? configuration
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self.init(
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epubURL: URL(string: "about:blank")!,
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configuration: resolvedConfig,
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persistence: persistence,
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dependencies: dependencies
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)
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self.isExternalTextBook = true
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self.textBook = textBook
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self.textFileURL = textFileURL
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self.currentBookIdentifier = bookIdentifier
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self.title = title
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self.didStartInitialLoad = true
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}
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public override func viewDidLoad() {
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super.viewDidLoad()
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currentBrightness = currentBrightness
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readerAssemblyCoordinator.assembleInterface()
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readerAssemblyCoordinator.finishExternalTextBookLaunchIfNeeded()
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readerView.onToolViewVisibilityChanged = { [weak self] isVisible in
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self?.handleToolViewVisibilityChanged(isVisible: isVisible)
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}
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}
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public override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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if navigationBarHiddenBeforeReader == nil {
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navigationBarHiddenBeforeReader = navigationController?.isNavigationBarHidden
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}
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navigationController?.setNavigationBarHidden(true, animated: animated)
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navigationController?.interactivePopGestureRecognizer?.delegate = self
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navigationController?.interactivePopGestureRecognizer?.isEnabled = true
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}
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public override func viewWillDisappear(_ animated: Bool) {
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super.viewWillDisappear(animated)
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if let navigationBarHiddenBeforeReader {
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navigationController?.setNavigationBarHidden(
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navigationBarHiddenBeforeReader,
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animated: animated
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)
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}
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}
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public override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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startInitialLoadIfNeeded()
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RDEPUBSettingsFlipAutomation.startIfNeeded(controller: self)
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}
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public override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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runtime.viewportMonitor.viewDidLayoutSubviews()
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}
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public override func didReceiveMemoryWarning() {
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super.didReceiveMemoryWarning()
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runtime.handleMemoryWarning()
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textDisplayCache.removeAll()
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}
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public override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
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super.viewWillTransition(to: size, with: coordinator)
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runtime.viewportMonitor.viewWillTransition(with: coordinator)
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coordinator.animate(alongsideTransition: nil) { _ in
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RDEPUBMemoryProbe.log("orientationTransition size=\(Int(size.width))x\(Int(size.height))")
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}
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}
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func showSearchBar() {
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guard !isSearchBarVisible else { return }
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isSearchBarVisible = true
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searchBarView.apply(theme: configuration.theme)
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searchBarView.onSearchSubmit = { [weak self] keyword in
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self?.searchBarView.showSearching()
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self?.runtime.search(keyword: keyword)
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self?.updateSearchCount()
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}
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searchBarView.onSearchTextChanged = { [weak self] keyword in
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guard let self else { return }
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let normalizedKeyword = keyword.trimmingCharacters(in: .whitespacesAndNewlines)
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if normalizedKeyword.isEmpty {
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self.runtime.clearSearch()
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} else {
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self.searchBarView.showSearching()
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self.runtime.search(keyword: normalizedKeyword)
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}
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self.updateSearchCount()
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}
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searchBarView.onSearchPrevious = { [weak self] in
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_ = self?.runtime.searchPrevious()
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self?.updateSearchCount()
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}
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searchBarView.onSearchNext = { [weak self] in
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_ = self?.runtime.searchNext()
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self?.updateSearchCount()
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}
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searchBarView.onSelectMatch = { [weak self] matchIndex in
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guard let self else { return }
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let didNavigate = self.runtime.selectSearchMatch(at: matchIndex)
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self.updateSearchCount()
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if didNavigate {
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self.hideSearchBar(clearSearch: false)
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}
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}
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searchBarView.onClose = { [weak self] in
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self?.hideSearchBar(clearSearch: true)
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}
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if readerView.isShowToolView {
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installSearchBarView()
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}
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}
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private func installSearchBarView() {
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guard searchBarView.superview == nil else { return }
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searchBarView.apply(theme: configuration.theme)
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readerView.addSubview(searchBarView)
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readerView.searchBarView = searchBarView
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let bottomAnchor = bottomToolView.superview == nil
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? readerView.bottomAnchor
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: bottomToolView.topAnchor
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NSLayoutConstraint.activate([
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searchBarView.leadingAnchor.constraint(equalTo: readerView.leadingAnchor),
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searchBarView.trailingAnchor.constraint(equalTo: readerView.trailingAnchor),
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searchBarView.topAnchor.constraint(equalTo: readerView.topAnchor),
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searchBarView.bottomAnchor.constraint(equalTo: bottomAnchor)
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])
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searchBarView.alpha = 0
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searchBarView.presentedView.transform = CGAffineTransform(translationX: 0, y: 40)
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UIView.animate(withDuration: 0.28) {
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self.searchBarView.alpha = 1
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self.searchBarView.presentedView.transform = .identity
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}
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if let keyword = searchState?.keyword, !keyword.isEmpty {
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searchBarView.restoreKeyword(keyword)
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updateSearchCount()
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} else {
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searchBarView.showNoResults()
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}
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DispatchQueue.main.async { [weak self] in
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self?.searchBarView.textField.becomeFirstResponder()
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}
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}
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func hideSearchBar(clearSearch: Bool = false) {
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guard isSearchBarVisible else { return }
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isSearchBarVisible = false
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searchBarView.textField.resignFirstResponder()
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UIView.animate(withDuration: 0.25, animations: {
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self.searchBarView.alpha = 0
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self.searchBarView.presentedView.transform = CGAffineTransform(translationX: 0, y: 40)
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}) { _ in
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self.searchBarView.removeFromSuperview()
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self.searchBarView.alpha = 1
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self.searchBarView.presentedView.transform = .identity
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self.readerView.searchBarView = nil
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}
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if clearSearch {
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runtime.clearSearch()
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}
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}
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func updateSearchCount() {
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guard let searchState else {
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searchBarView.showNoResults()
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return
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}
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searchBarView.updateResults(
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sections: searchResultSections(for: searchState),
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keyword: searchState.keyword,
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currentMatchIndex: searchState.currentMatchIndex
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)
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}
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func handleToolViewVisibilityChanged(isVisible: Bool) {
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if isVisible {
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if isSearchBarVisible {
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installSearchBarView()
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} else if searchState != nil {
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showSearchBar()
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}
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} else {
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if isSearchBarVisible {
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hideSearchBar(clearSearch: false)
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}
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}
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}
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}
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private extension RDEPUBReaderController {
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func searchResultSections(for searchState: RDEPUBSearchState) -> [RDEPUBReaderSearchSection] {
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let groupedMatches = Dictionary(grouping: Array(searchState.matches.enumerated()), by: { entry in
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searchSectionTitle(for: entry.element)
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})
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let orderedTitles = searchState.matches.reduce(into: [String]()) { titles, match in
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let title = searchSectionTitle(for: match)
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if titles.last != title, titles.contains(title) == false {
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titles.append(title)
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}
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}
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return orderedTitles.compactMap { title in
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guard let matches = groupedMatches[title] else { return nil }
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let items = matches.map { offset, match in
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RDEPUBReaderSearchSection.Item(
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matchIndex: offset,
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previewText: match.previewText,
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isCurrent: offset == searchState.currentMatchIndex
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)
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}
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return RDEPUBReaderSearchSection(title: title, items: items)
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}
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}
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func searchSectionTitle(for match: RDEPUBSearchMatch) -> String {
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guard let publication else {
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return match.href
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}
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let normalizedMatchHref = publication.resourceResolver.normalizedHref(match.href) ?? match.href
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let tocItems = flattenedTableOfContentsItems(from: publication.tableOfContents, includePageNumbers: false)
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if let tocItem = tocItems.last(where: {
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let rawHref = $0.href.components(separatedBy: "#").first ?? $0.href
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let normalizedItemHref = publication.resourceResolver.normalizedHref(rawHref) ?? rawHref
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return normalizedItemHref == normalizedMatchHref
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}) {
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return tocItem.title
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}
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if let spineIndex = publication.resourceResolver.spineIndex(forNormalizedHref: normalizedMatchHref),
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publication.spine.indices.contains(spineIndex) {
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return publication.spine[spineIndex].title
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}
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return normalizedMatchHref
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}
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}
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