d15f20b097
- 拆分 ContentDelegates/TextContentView 为独立协调器（InteractionCoordinator、LocationResolution、ExternalLinks、AttachmentTooltip） - 新增 RDEPUBAttachmentTooltipView/OverlayView 附件气泡提示 - 新增 RDEPUBDarkImageAdjuster 暗色模式图片亮度适配 - 新增 RDEPUBSelectionLoupeView 选区放大镜 - 新增 MetadataParseWorker/CancellationController 元数据解析取消机制 - 重构 PresentationRuntime/PaginationCoordinator 精简职责 - 优化 ChapterLoader/WarmupOrchestrator 异步章节加载 - CFI 模块微调与 NoteModels 更新 - 清理冗余文档，更新架构/UML/业务逻辑文档 Co-Authored-By: Claude <noreply@anthropic.com>
573 lines
26 KiB
Swift
573 lines
26 KiB
Swift
import Foundation
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final class RDEPUBMetadataParseWorker {
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private static let maxRetryCount = 3
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private static let retryDelays: [TimeInterval] = [0.5, 2.0, 8.0]
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private final class ParseState {
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var summariesBySpineIndex: [Int: RDEPUBChapterSummary]
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var totalResolvedCount: Int
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var lastAppliedCount: Int
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init(
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summariesBySpineIndex: [Int: RDEPUBChapterSummary],
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totalResolvedCount: Int,
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lastAppliedCount: Int
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) {
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self.summariesBySpineIndex = summariesBySpineIndex
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self.totalResolvedCount = totalResolvedCount
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self.lastAppliedCount = lastAppliedCount
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}
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}
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private let backgroundInteractionCooldown: CFAbsoluteTime = 0.8
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unowned let context: RDEPUBReaderContext
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let cancellationController: RDEPUBMetadataParseCancellationController
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let pageMapRefreshInterval: Int
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private let token: UUID
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private let parser: RDEPUBParser
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private let publication: RDEPUBPublication
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private let pageSize: CGSize
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private let layoutConfig: RDEPUBTextLayoutConfig
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private let style: RDEPUBTextRenderStyle
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private let renderSignature: String
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private let allBuildableIndices: [Int]
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private let summaryDiskCache: RDEPUBChapterSummaryDiskCache?
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private let workerCount: Int
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private let contentHashBySpineIndex: [Int: String]
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private let catalog: [(key: RDEPUBChapterCacheKey, spineIndex: Int, href: String, title: String)]
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init(
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context: RDEPUBReaderContext,
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cancellationController: RDEPUBMetadataParseCancellationController,
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token: UUID,
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parser: RDEPUBParser,
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publication: RDEPUBPublication
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) {
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self.context = context
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self.cancellationController = cancellationController
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self.token = token
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self.parser = parser
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self.publication = publication
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let pageSize = context.currentTextPageSize()
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self.pageSize = pageSize
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self.layoutConfig = context.currentTextLayoutConfig(pageSize: pageSize)
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self.style = context.currentTextRenderStyle()
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self.renderSignature = context.currentRenderSignature()
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self.allBuildableIndices = publication.spine.indices.filter { index in
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guard publication.spine.indices.contains(index) else { return false }
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let item = publication.spine[index]
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return item.linear && (item.mediaType.contains("html") || item.mediaType.contains("xhtml"))
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}
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self.summaryDiskCache = context.runtime?.summaryDiskCache
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self.workerCount = max(1, context.configuration.metadataParsingConcurrency)
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self.pageMapRefreshInterval = RDEPUBReaderPaginationCoordinator.pageMapRefreshInterval
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var hashes: [Int: String] = [:]
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for spineIndex in allBuildableIndices {
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guard let href = publication.spine.indices.contains(spineIndex)
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? publication.spine[spineIndex].href : nil,
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let html = parser.htmlString(forRelativePath: href) else {
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hashes[spineIndex] = ""
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continue
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}
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hashes[spineIndex] = html.rd_sha256Hex
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}
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self.contentHashBySpineIndex = hashes
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let ctx = context
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let spine = publication.spine
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let sig = renderSignature
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self.catalog = allBuildableIndices.map { spineIndex in
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let item = spine[spineIndex]
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return (
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key: ctx.chapterCacheKey(
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forSpineIndex: spineIndex,
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precomputedContentHash: hashes[spineIndex] ?? "",
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renderSignature: sig
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),
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spineIndex: spineIndex,
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href: item.href,
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title: item.title
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)
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}
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}
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func start(token: UUID, restoreLocation: RDEPUBLocation?) {
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let context = self.context
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let cancellationController = self.cancellationController
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DispatchQueue.global(qos: .utility).async { [weak self] in
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guard let self else { return }
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defer { self.context.runtime?.paginationCoordinator.finishMetadataParseCancellationController(cancellationController) }
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guard context.controller != nil,
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!cancellationController.isCancelled,
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context.paginationToken == token else { return }
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if let restoredPageMap = self.restoreBookPageMapIfPossible() {
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"full cache restore hit chapters=\(restoredPageMap.totalChapters) pages=\(restoredPageMap.totalPages)"
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)
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DispatchQueue.main.async {
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guard context.paginationToken == token,
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context.controller != nil,
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!cancellationController.isCancelled else { return }
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context.runtime?.refreshBookPageMapInPlace(restoredPageMap)
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}
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return
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}
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let prewarmStart = CFAbsoluteTimeGetCurrent()
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let prewarmMs = Int((CFAbsoluteTimeGetCurrent() - prewarmStart) * 1000)
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RDEPUBBackgroundTrace.log("MetadataParse", "prewarmHashMs=\(prewarmMs) chapters=\(self.allBuildableIndices.count)")
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let restored = self.summaryDiskCache?.readAll(keys: self.catalog)
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"begin token=\(token.uuidString) buildableChapters=\(self.allBuildableIndices.count) concurrency=\(self.workerCount)"
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)
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let cachedSummaries = restored?.summaries ?? [:]
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let cachedSpineIndices = Set(cachedSummaries.keys)
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let resultLock = NSLock()
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let parseState = ParseState(
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summariesBySpineIndex: cachedSummaries,
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totalResolvedCount: cachedSpineIndices.count,
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lastAppliedCount: cachedSpineIndices.count
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)
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if !cachedSpineIndices.isEmpty {
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"resumeFromCache cachedChapters=\(cachedSpineIndices.count) total=\(self.allBuildableIndices.count)"
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)
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let cachedMap = self.buildPageMap(summaries: parseState.summariesBySpineIndex)
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DispatchQueue.main.async {
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guard context.paginationToken == token,
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context.controller != nil else { return }
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context.runtime?.refreshBookPageMapInPlace(cachedMap)
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}
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}
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let prioritizedSpineIndices: [Int]
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if let priorityManager = context.runtime?.backgroundPriorityManager {
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let currentSpineIndex = context.runtime?.locationCoordinator.currentVisibleLocation()
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.flatMap { context.normalizedSpineIndex(for: $0) }
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prioritizedSpineIndices = priorityManager.makeMetadataPriorityOrder(
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allBuildableIndices: self.allBuildableIndices,
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currentSpineIndex: currentSpineIndex,
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cachedSpineIndices: cachedSpineIndices
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)
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"prioritized hot=\(prioritizedSpineIndices.prefix(10).count) total=\(prioritizedSpineIndices.count)"
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)
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} else {
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prioritizedSpineIndices = self.allBuildableIndices.filter { !cachedSpineIndices.contains($0) }
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}
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let uncachedSpineIndices = prioritizedSpineIndices
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self.waitForReadingInteractionToSettle(cancellationController: cancellationController)
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guard !cancellationController.isCancelled,
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context.controller != nil,
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context.paginationToken == token else {
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RDEPUBBackgroundTrace.log("MetadataParse", "abort before queue start")
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return
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}
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let wallClockStart = CFAbsoluteTimeGetCurrent()
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var totalRenderMs: Double = 0
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var totalWriteMs: Double = 0
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var totalMergeMs: Double = 0
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var completedChapters = 0
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var failedChapters = 0
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let timingLock = NSLock()
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let queue = OperationQueue()
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queue.name = "com.rdreader.metadata.parse"
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queue.qualityOfService = .utility
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queue.maxConcurrentOperationCount = self.workerCount
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cancellationController.attach(queue: queue)
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let refreshInterval = self.pageMapRefreshInterval
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for (offset, spineIndex) in uncachedSpineIndices.enumerated() {
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let operation = BlockOperation()
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operation.addExecutionBlock { [weak operation] in
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled,
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operation?.isCancelled != true else {
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return
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}
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do {
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RDEPUBBackgroundTrace.log("MetadataParse", "正在解析 spine=\(spineIndex) \(offset + 1)/\(uncachedSpineIndices.count)")
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let renderResult: RDEPUBChapterSummary? = try autoreleasepool { () -> RDEPUBChapterSummary? in
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled,
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operation?.isCancelled != true else {
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return nil
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}
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let chapterBuilder = context.makeTextBookBuilder(layoutConfig: self.layoutConfig)
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let renderStart = CFAbsoluteTimeGetCurrent()
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guard let result = try chapterBuilder.buildChapter(
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parser: self.parser,
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publication: self.publication,
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spineIndex: spineIndex,
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pageSize: self.pageSize,
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style: self.style
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) else {
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return nil
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}
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled,
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operation?.isCancelled != true else {
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RDEPUBBackgroundTrace.log("MetadataParse", "drop rendered chapter due to cancellation spine=\(spineIndex)")
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return nil
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}
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let renderElapsed = (CFAbsoluteTimeGetCurrent() - renderStart) * 1000
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let chapter = result.chapter
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let precomputedHash = self.contentHashBySpineIndex[spineIndex] ?? ""
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let cacheKey = context.chapterCacheKey(
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forSpineIndex: spineIndex,
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precomputedContentHash: precomputedHash,
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renderSignature: self.renderSignature
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)
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let summary = RDEPUBChapterSummary(
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pageRanges: chapter.pages.map { .init(location: $0.contentRange.location, length: $0.contentRange.length) },
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pageCount: chapter.pages.count,
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fragmentOffsets: chapter.fragmentOffsets,
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cfiMap: chapter.cfiMap,
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renderSignature: cacheKey.renderSignature,
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schemaVersion: RDEPUBChapterSummary.currentSchemaVersion,
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chapterContentHash: cacheKey.chapterContentHash,
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pageMetadataList: chapter.pages.map { .from($0.metadata) }
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)
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled,
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operation?.isCancelled != true else {
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RDEPUBBackgroundTrace.log("MetadataParse", "skip disk write due to cancellation spine=\(spineIndex)")
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return nil
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}
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let writeStart = CFAbsoluteTimeGetCurrent()
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self.summaryDiskCache?.write(summary: summary, for: cacheKey)
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let writeElapsed = (CFAbsoluteTimeGetCurrent() - writeStart) * 1000
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timingLock.lock()
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totalRenderMs += renderElapsed
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totalWriteMs += writeElapsed
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completedChapters += 1
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timingLock.unlock()
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"spine=\(spineIndex) renderMs=\(Int(renderElapsed)) writeMs=\(Int(writeElapsed))"
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)
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return summary
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}
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guard let renderResult else { return }
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled,
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operation?.isCancelled != true else {
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return
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}
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var snapshot: [Int: RDEPUBChapterSummary]?
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resultLock.lock()
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parseState.summariesBySpineIndex[spineIndex] = renderResult
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parseState.totalResolvedCount += 1
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if parseState.totalResolvedCount - parseState.lastAppliedCount >= refreshInterval
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|| parseState.totalResolvedCount == self.allBuildableIndices.count {
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parseState.lastAppliedCount = parseState.totalResolvedCount
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snapshot = parseState.summariesBySpineIndex
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}
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resultLock.unlock()
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if let snapshot {
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let mergeStart = CFAbsoluteTimeGetCurrent()
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let partialMap = self.buildPageMap(summaries: snapshot)
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let mergeElapsed = (CFAbsoluteTimeGetCurrent() - mergeStart) * 1000
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timingLock.lock()
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totalMergeMs += mergeElapsed
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timingLock.unlock()
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DispatchQueue.main.async {
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guard context.paginationToken == token,
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context.controller != nil,
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!cancellationController.isCancelled else { return }
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context.runtime?.refreshBookPageMapInPlace(partialMap)
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}
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}
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} catch {
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guard !cancellationController.isCancelled,
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context.paginationToken == token,
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context.controller != nil,
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operation?.isCancelled != true else {
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return
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}
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timingLock.lock()
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failedChapters += 1
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timingLock.unlock()
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RDEPUBBackgroundTrace.log("MetadataParse", "buildChapter FAILED: spine=\(spineIndex) error=\(error)")
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self.scheduleRetry(
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spineIndex: spineIndex,
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retryCount: 0,
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resultLock: resultLock,
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parseState: parseState,
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cancellationController: cancellationController
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)
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}
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}
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queue.addOperation(operation)
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}
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queue.waitUntilAllOperationsAreFinished()
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if !cancellationController.isCancelled,
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context.paginationToken == token,
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context.controller != nil {
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self.summaryDiskCache?.flushPendingWrites()
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}
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let wallClockMs = Int((CFAbsoluteTimeGetCurrent() - wallClockStart) * 1000)
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timingLock.lock()
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let renderTotal = Int(totalRenderMs)
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let writeTotal = Int(totalWriteMs)
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let mergeTotal = Int(totalMergeMs)
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let rendered = completedChapters
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let failed = failedChapters
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timingLock.unlock()
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let avgRenderMs = rendered > 0 ? renderTotal / rendered : 0
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"timing wallClockMs=\(wallClockMs) chapters=\(rendered) failed=\(failed) " +
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"prewarmHashMs=\(prewarmMs) renderTotalMs=\(renderTotal) writeTotalMs=\(writeTotal) " +
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"mergeTotalMs=\(mergeTotal) avgRenderMs=\(avgRenderMs) concurrency=\(self.workerCount)"
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)
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context.lastMetadataParseWallClockMs = wallClockMs
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context.lastMetadataParseConcurrency = self.workerCount
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guard context.controller != nil,
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context.paginationToken == token,
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!cancellationController.isCancelled else {
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RDEPUBBackgroundTrace.log("MetadataParse", "abort: reader dismissed or token changed")
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return
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}
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let finalMergeStart = CFAbsoluteTimeGetCurrent()
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let pageMap = self.buildPageMap(summaries: parseState.summariesBySpineIndex)
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let finalMergeMs = Int((CFAbsoluteTimeGetCurrent() - finalMergeStart) * 1000)
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"complete chapters=\(pageMap.totalChapters) pages=\(pageMap.totalPages) finalMergeMs=\(finalMergeMs)"
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)
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if let coverageStore = context.runtime?.backgroundCoverageStore {
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let resolvedSpineIndices = Set(parseState.summariesBySpineIndex.keys)
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let lowerSpine = resolvedSpineIndices.min() ?? 0
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let upperSpine = resolvedSpineIndices.max() ?? 0
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let estimatedBytes = 256 + pageMap.entries.count * 96 + resolvedSpineIndices.count * 16
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let segment = RDEPUBBackgroundCoverageSegment(
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lowerSpineIndex: lowerSpine,
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upperSpineIndex: upperSpine,
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pageMap: pageMap,
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resolvedSpineIndices: resolvedSpineIndices,
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generatedAt: CFAbsoluteTimeGetCurrent(),
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renderSignature: self.renderSignature,
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estimatedMemoryBytes: estimatedBytes
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)
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coverageStore.addSegment(segment)
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}
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DispatchQueue.main.async {
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guard context.paginationToken == token,
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context.controller != nil else { return }
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context.runtime?.refreshBookPageMapInPlace(pageMap)
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}
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}
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}
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// MARK: - Private
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private func waitForReadingInteractionToSettle(
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cancellationController: RDEPUBMetadataParseCancellationController? = nil
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) {
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while context.controller != nil,
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cancellationController?.isCancelled != true,
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context.secondsSinceLastUserNavigation() < backgroundInteractionCooldown {
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Thread.sleep(forTimeInterval: 0.08)
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}
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}
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private func scheduleRetry(
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spineIndex: Int,
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retryCount: Int,
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resultLock: NSLock,
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parseState: ParseState,
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cancellationController: RDEPUBMetadataParseCancellationController
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) {
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guard retryCount < Self.maxRetryCount else {
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"spine=\(spineIndex) max retries reached, marking as deferredFailure"
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)
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return
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}
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let delay = Self.retryDelays[min(retryCount, Self.retryDelays.count - 1)]
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RDEPUBBackgroundTrace.log(
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"MetadataParse",
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"scheduling retry for spine=\(spineIndex) attempt=\(retryCount + 1) delay=\(delay)s"
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)
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DispatchQueue.global(qos: .utility).asyncAfter(deadline: .now() + delay) { [weak self] in
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guard let self else { return }
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let context = self.context
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guard context.controller != nil,
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context.paginationToken == self.token,
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!cancellationController.isCancelled else {
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return
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}
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do {
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let chapterBuilder = context.makeTextBookBuilder(layoutConfig: self.layoutConfig)
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guard let result = try chapterBuilder.buildChapter(
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parser: self.parser,
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publication: self.publication,
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spineIndex: spineIndex,
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pageSize: self.pageSize,
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style: self.style
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) else {
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return
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}
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guard context.controller != nil,
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context.paginationToken == self.token,
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!cancellationController.isCancelled else {
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RDEPUBBackgroundTrace.log("MetadataParse", "drop retry result due to cancellation spine=\(spineIndex)")
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return
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}
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let chapter = result.chapter
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let precomputedHash = self.contentHashBySpineIndex[spineIndex] ?? ""
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let cacheKey = context.chapterCacheKey(
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forSpineIndex: spineIndex,
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precomputedContentHash: precomputedHash,
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renderSignature: self.renderSignature
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)
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let summary = RDEPUBChapterSummary(
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pageRanges: chapter.pages.map { .init(location: $0.contentRange.location, length: $0.contentRange.length) },
|
|
pageCount: chapter.pages.count,
|
|
fragmentOffsets: chapter.fragmentOffsets,
|
|
cfiMap: chapter.cfiMap,
|
|
renderSignature: cacheKey.renderSignature,
|
|
schemaVersion: RDEPUBChapterSummary.currentSchemaVersion,
|
|
chapterContentHash: cacheKey.chapterContentHash,
|
|
pageMetadataList: chapter.pages.map { .from($0.metadata) }
|
|
)
|
|
guard context.controller != nil,
|
|
context.paginationToken == self.token,
|
|
!cancellationController.isCancelled else {
|
|
RDEPUBBackgroundTrace.log("MetadataParse", "skip retry disk write due to cancellation spine=\(spineIndex)")
|
|
return
|
|
}
|
|
self.summaryDiskCache?.write(summary: summary, for: cacheKey)
|
|
|
|
resultLock.lock()
|
|
parseState.summariesBySpineIndex[spineIndex] = summary
|
|
parseState.totalResolvedCount += 1
|
|
let shouldRefresh =
|
|
parseState.totalResolvedCount - parseState.lastAppliedCount >= self.pageMapRefreshInterval
|
|
|| parseState.totalResolvedCount == self.allBuildableIndices.count
|
|
if shouldRefresh {
|
|
parseState.lastAppliedCount = parseState.totalResolvedCount
|
|
}
|
|
resultLock.unlock()
|
|
|
|
if shouldRefresh {
|
|
let partialMap = self.buildPageMap(summaries: parseState.summariesBySpineIndex)
|
|
DispatchQueue.main.async {
|
|
guard context.paginationToken == self.token,
|
|
context.controller != nil,
|
|
!cancellationController.isCancelled else { return }
|
|
context.runtime?.refreshBookPageMapInPlace(partialMap)
|
|
}
|
|
}
|
|
|
|
RDEPUBBackgroundTrace.log(
|
|
"MetadataParse",
|
|
"retry succeeded for spine=\(spineIndex) attempt=\(retryCount + 1)"
|
|
)
|
|
} catch {
|
|
RDEPUBBackgroundTrace.log(
|
|
"MetadataParse",
|
|
"retry failed for spine=\(spineIndex) attempt=\(retryCount + 1) error=\(error)"
|
|
)
|
|
|
|
self.scheduleRetry(
|
|
spineIndex: spineIndex,
|
|
retryCount: retryCount + 1,
|
|
resultLock: resultLock,
|
|
parseState: parseState,
|
|
cancellationController: cancellationController
|
|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
private func restoreBookPageMapIfPossible() -> RDEPUBBookPageMap? {
|
|
guard let summaryDiskCache else { return nil }
|
|
guard summaryDiskCache.isCacheComplete(keys: catalog.map(\.key)) else {
|
|
return nil
|
|
}
|
|
let restored = summaryDiskCache.readAll(keys: catalog)
|
|
guard restored.summaries.count == catalog.count else {
|
|
return nil
|
|
}
|
|
return restored.mapBuilder.build()
|
|
}
|
|
|
|
private func buildPageMap(
|
|
summaries: [Int: RDEPUBChapterSummary]
|
|
) -> RDEPUBBookPageMap {
|
|
var builder = RDEPUBBookPageMap.Builder()
|
|
for item in catalog {
|
|
guard let summary = summaries[item.spineIndex] else { continue }
|
|
builder.add(
|
|
spineIndex: item.spineIndex,
|
|
href: item.href,
|
|
title: item.title,
|
|
pageCount: summary.pageCount,
|
|
fragmentOffsets: summary.fragmentOffsets
|
|
)
|
|
}
|
|
return builder.build()
|
|
}
|
|
}
|