Epub阅读器0.0.1
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//
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// RDReaderManager.swift
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// RDReaderDemo
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//
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// Created by yangsq on 2021/8/20.
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//
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import UIKit
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struct Book {
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var desc: String?
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var chapters: [Chapter]
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}
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struct Chapter {
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/// 第几章
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var sort: Int
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/// 章节名称
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var title: String?
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/// 划分了多少页
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var pageCount: Int
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/// 内容
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var content: String
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/// 分页
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var pages: [ChapterPage]
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/// 文字的长度
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var range: NSRange
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}
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struct ChapterPage {
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/// 第几章
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var chapterSort: Int
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/// 第几页
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var pageNum: Int
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/// 内容
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var content: String
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/// 内容
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var attrContent: NSAttributedString
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/// 文字的长度
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var range: NSRange
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}
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public struct DemoBookItem {
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public var title: String
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public var source: BookSource
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public init(title: String, source: BookSource) {
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self.title = title
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self.source = source
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}
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}
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extension RDReaderManager {
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static let themeTypeKey = "themeType.key"
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static let brightValueKey = "brightValue.key"
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static let fontValueKey = "fontValue.key"
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static let lineSpaceKey = "lineSpace.key"
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static let pageCurlTypeKey = "pageCurlType.key"
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static let readProgressKey = "readProgress.key"
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}
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typealias BrightValue = CGFloat
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extension BrightValue: RDReaderObserverType {
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var cachesValue: CGFloat {
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return self
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}
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var value: CGFloat {
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return self
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}
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func transform(value: Any?) -> BrightValue {
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return (value as? BrightValue) ?? self
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}
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}
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extension Int: RDReaderObserverType {
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var cachesValue: Int {
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return self
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}
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var value: Int {
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return self
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}
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func transform(value: Any?) -> Int {
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return (value as? Int) ?? self
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}
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}
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extension String: RDReaderObserverType {
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var cachesValue: String {
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return self
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}
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var value: String {
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return self
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}
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func transform(value: Any?) -> String {
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return (value as? String) ?? self
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}
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}
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public class RDReaderManager: NSObject {
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public static let shared = RDReaderManager()
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let themeType = RDReaderObserver(key: RDReaderManager.themeTypeKey, defaultType: RDReaderCommon.Colors.white)
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let brightValue = RDReaderObserver(key: RDReaderManager.brightValueKey, defaultType: UIScreen.main.brightness)
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let fontValue = RDReaderObserver(key: RDReaderManager.fontValueKey, defaultType: CGFloat(15.0))
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let lineSpaceType = RDReaderObserver(key: RDReaderManager.lineSpaceKey, defaultType: RDReaderCommon.SpaceType.min)
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let pageCurlTypeType = RDReaderObserver(key: RDReaderManager.pageCurlTypeKey, defaultType: RDReaderCommon.PageCurlType.pageCurl)
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let readProgress = RDReaderObserver(key: RDReaderManager.readProgressKey, defaultType: 0)
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let epubReadLocation = RDReaderObserver(key: "epubReadLocation.key", defaultType: "")
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let epubSelection = RDReaderObserver(key: "epubSelection.key", defaultType: "")
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let epubHighlights = RDReaderObserver(key: "epubHighlights.key", defaultType: "")
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}
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protocol RDReaderObserverType {
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associatedtype Value
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associatedtype CacheValue
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associatedtype CurrentType
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var cachesValue: CacheValue { get }
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var value: Value { get }
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func transform(value: Any?) -> CurrentType
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}
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class RDReaderObserver<CurrentType> where CurrentType: RDReaderObserverType {
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private var _currentType: CurrentType? = nil
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private var key: String
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private var defaultType: CurrentType
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typealias Observer = ((CurrentType.Value) -> Void)
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private var observers = [WeakObserver<Observer>]()
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var currentType: CurrentType {
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get {
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if _currentType != nil {
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return _currentType!
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} else {
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_currentType = (self.defaultType.transform(value: UserDefaults.standard.object(forKey: key)) as? CurrentType) ?? self.defaultType
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return _currentType!
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}
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}
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set {
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_currentType = newValue
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UserDefaults.standard.set(newValue.cachesValue, forKey: key)
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UserDefaults.standard.synchronize()
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observers.forEach { observer in
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if let observer = observer.observer?.observer {
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observer(_currentType!.value)
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}
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}
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}
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}
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init(key: String, defaultType: CurrentType) {
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self.key = key
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self.defaultType = defaultType
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}
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func observeChange(onNext: Observer?) {
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if let onNext = onNext {
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onNext(currentType.value)
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observers.append(WeakObserver(observer: onNext))
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}
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}
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}
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private class WeakObserver<T> {
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class _Observer<T>: NSObject {
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var observer: T
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init(observer: T) {
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self.observer = observer
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super.init()
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}
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}
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weak var observer: _Observer<T>?
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private var _strongObserver: _Observer<T>?
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init(observer: T) {
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let t = _Observer(observer: observer)
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_strongObserver = t
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self.observer = _strongObserver
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}
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}
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extension RDReaderManager {
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func epubReaderConfiguration() -> RDEPUBReaderConfiguration {
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let theme = themeType.currentType.value
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return RDEPUBReaderConfiguration(
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fontSize: fontValue.currentType,
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lineHeightMultiple: lineSpaceType.currentType.mulitiple,
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displayType: pageCurlTypeType.currentType.value,
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landscapeDualPageEnabled: true,
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reflowableContentInsets: UIEdgeInsets(top: 40, left: 16, bottom: 40, right: 16),
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fixedContentInset: .zero,
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theme: RDEPUBReaderTheme(
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contentBackgroundColor: theme.contentBackgroudColor ?? .white,
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contentTextColor: theme.contentTextColor ?? .black,
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toolBackgroundColor: theme.toolBackgroudColor ?? .white,
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toolControlTextColor: theme.toolControlTextColor ?? .black,
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toolControlBorderUnselectColor: theme.toolControlBorderUnSelectColor ?? UIColor.lightGray.withAlphaComponent(0.5),
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toolLineColor: theme.toolLineColor ?? UIColor.lightGray.withAlphaComponent(0.5)
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),
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fixedLayoutFit: .page,
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fixedLayoutSpreadMode: .automatic,
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textRenderingEngine: .dtCoreText
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)
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}
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func epubPreferences(
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theme: RDReaderTheme? = nil,
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reflowableInsets: UIEdgeInsets,
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fixedContentInset: UIEdgeInsets
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) -> RDEPUBPreferences {
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let resolvedTheme = theme ?? themeType.currentType.value
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let backgroundColorCSS = resolvedTheme.contentBackgroudColor?.ss_cssString
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return RDEPUBPreferences(
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fontSize: fontValue.currentType,
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lineHeightMultiple: lineSpaceType.currentType.mulitiple,
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reflowableContentInsets: reflowableInsets,
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fixedContentInset: fixedContentInset,
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themeBackgroundColor: backgroundColorCSS,
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themeTextColor: resolvedTheme.contentTextColor?.ss_cssString,
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fixedBackgroundColor: backgroundColorCSS,
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fixedLayoutFit: .page,
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fixedLayoutSpreadMode: .automatic
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)
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}
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func bundledEPUBURLs(in bundle: Bundle = .main) -> [URL] {
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(bundle.urls(forResourcesWithExtension: "epub", subdirectory: nil) ?? [])
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.sorted { lhs, rhs in
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lhs.deletingPathExtension().lastPathComponent.localizedStandardCompare(rhs.deletingPathExtension().lastPathComponent) == .orderedAscending
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}
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}
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public func demoBookItems(in bundle: Bundle = .main) -> [DemoBookItem] {
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let textDemo = DemoBookItem(title: "宠她.txt", source: .textFile)
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let epubItems = bundledEPUBURLs(in: bundle).map { url in
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DemoBookItem(title: url.deletingPathExtension().lastPathComponent, source: .epubFile(url: url))
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}
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return [textDemo] + epubItems
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}
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@discardableResult
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public func startReading(book item: DemoBookItem, from navigationController: UINavigationController?, animated: Bool = true) -> UIViewController? {
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let readerController: UIViewController
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switch item.source {
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case .textFile:
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guard let textURL = Bundle.main.url(forResource: "宠她", withExtension: "txt") else {
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return nil
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}
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readerController = RDURLReaderController(bookURL: textURL)
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case .epubFile(let url):
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readerController = RDURLReaderController(
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bookURL: url,
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epubConfiguration: epubReaderConfiguration()
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)
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}
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readerController.title = item.title
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navigationController?.pushViewController(readerController, animated: animated)
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return readerController
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}
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func encodeTextFile(font: UIFont, lineSapce: CGFloat, size: CGSize) -> Book {
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let decodeString = String.encodeTextFile(url: URL(fileURLWithPath: Bundle.main.path(forResource: "宠她", ofType: ".txt")!))
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let parten = "第[0-9一二三四五六七八九十百千]*[章回].*"
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var chapters = [Chapter]()
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var desc: String?
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if let expression = try? NSRegularExpression(pattern: parten, options: .caseInsensitive) {
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let results = expression.matches(in: decodeString, options: .reportCompletion, range: NSMakeRange(0, decodeString.count))
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var startCount = -1
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var lastTitle: String?
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for result in results {
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let index = results.firstIndex(of: result)
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let range = result.range
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if startCount != -1 && index! > 0 {
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let contentRange = NSMakeRange(startCount, range.location - startCount)
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let content = decodeString.substring(with: Range(contentRange, in: decodeString)!)
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let pages = chapterPages(content: content, font: font, lineSapce: lineSapce, size: size, chapterSort: index!)
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let chapter = Chapter(sort: index!,title: lastTitle, pageCount: pages.count, content: String(content), pages: pages, range: contentRange)
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chapters.append(chapter)
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if index == results.count - 1 {
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let contentRange = NSMakeRange(range.location, decodeString.count - range.location)
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let content = decodeString.substring(with: Range(contentRange, in: decodeString)!)
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let title = decodeString.substring(with: Range(range, in: decodeString)!)
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let pages = chapterPages(content: content, font: font, lineSapce: lineSapce, size: size, chapterSort: index!)
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let chapter = Chapter(sort: index! + 1, title: title, pageCount: pages.count, content: String(content), pages: pages, range: contentRange)
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chapters.append(chapter)
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}
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}
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startCount = range.location
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lastTitle = decodeString.substring(with: Range(range, in: decodeString)!)
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if index == 0 && range.location > 0 {
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desc = decodeString.substring(with: Range(NSMakeRange(0, range.location), in: decodeString)!)
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}
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}
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}
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return Book(desc: desc, chapters: chapters)
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}
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func chapterPages(content: String, font: UIFont, lineSapce: CGFloat, size: CGSize, chapterSort: Int) -> [ChapterPage] {
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let attrString = NSMutableAttributedString(string: content)
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let style = NSMutableParagraphStyle()
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style.lineSpacing = lineSapce
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attrString.addAttributes([NSAttributedString.Key.font : font, NSAttributedString.Key.paragraphStyle: style], range: NSMakeRange(0, content.count))
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let pageRanges = attrString.pageRanges(size: size)
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let pages = pageRanges.map({
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pageRange -> ChapterPage in
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let pageContent = content.substring(with: Range(pageRange, in: content)!)
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let pageAttrContent = attrString.attributedSubstring(from: pageRange)
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return ChapterPage(chapterSort: chapterSort, pageNum: pageRanges.firstIndex(of: pageRange)!, content: pageContent, attrContent: pageAttrContent, range: pageRange)
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})
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return pages
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}
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}
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