Epub阅读器0.0.1
This commit is contained in:
shen
@@ -0,0 +1,411 @@
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import Foundation
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public struct RDEPUBLocation: Codable, Equatable {
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public var bookIdentifier: String?
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public var href: String
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public var progression: Double
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public var lastProgression: Double?
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public var fragment: String?
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public init(
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bookIdentifier: String? = nil,
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href: String,
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progression: Double,
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lastProgression: Double? = nil,
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fragment: String? = nil
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) {
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self.bookIdentifier = bookIdentifier
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self.href = href
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self.progression = Self.clamp(progression)
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self.lastProgression = lastProgression.map(Self.clamp)
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self.fragment = fragment?.nilIfEmpty
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}
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public var navigationProgression: Double {
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let end = lastProgression ?? progression
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if end.isNaN || end.isInfinite {
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return progression
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}
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return Self.clamp((progression + end) / 2.0)
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}
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private static func clamp(_ value: Double) -> Double {
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guard value.isFinite else { return 0 }
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return min(1, max(0, value))
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}
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}
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public struct RDEPUBViewportResource: Codable, Equatable {
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public var href: String
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public var spineIndex: Int
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public var progression: Double
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public var lastProgression: Double?
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public var fragment: String?
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public init(
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href: String,
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spineIndex: Int,
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progression: Double,
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lastProgression: Double? = nil,
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fragment: String? = nil
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) {
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self.href = href
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self.spineIndex = spineIndex
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self.progression = progression
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self.lastProgression = lastProgression
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self.fragment = fragment
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}
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}
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public struct RDEPUBViewport: Codable, Equatable {
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public var resources: [RDEPUBViewportResource]
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public var visiblePageNumber: Int
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public var chapterIndex: Int?
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public var isFixedLayout: Bool
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public init(
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resources: [RDEPUBViewportResource],
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visiblePageNumber: Int,
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chapterIndex: Int? = nil,
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isFixedLayout: Bool
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) {
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self.resources = resources
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self.visiblePageNumber = visiblePageNumber
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self.chapterIndex = chapterIndex
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self.isFixedLayout = isFixedLayout
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}
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}
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public struct RDEPUBReadingContext: Codable, Equatable {
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public var location: RDEPUBLocation
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public var viewport: RDEPUBViewport
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public var pageNumber: Int
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public var chapterIndex: Int?
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public init(
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location: RDEPUBLocation,
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viewport: RDEPUBViewport,
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pageNumber: Int,
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chapterIndex: Int? = nil
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) {
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self.location = location
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self.viewport = viewport
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self.pageNumber = pageNumber
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self.chapterIndex = chapterIndex
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}
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}
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public struct RDEPUBSelection: Codable, Equatable {
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public var bookIdentifier: String?
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public var location: RDEPUBLocation
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public var text: String
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public var rangeInfo: String?
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public var createdAt: Date
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public init(
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bookIdentifier: String? = nil,
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location: RDEPUBLocation,
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text: String,
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rangeInfo: String? = nil,
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createdAt: Date = Date()
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) {
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self.bookIdentifier = bookIdentifier
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self.location = location
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self.text = text
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self.rangeInfo = rangeInfo?.nilIfEmpty
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self.createdAt = createdAt
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}
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public var isEmpty: Bool {
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text.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty || rangeInfo?.isEmpty != false
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}
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}
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public enum RDEPUBHighlightStyle: String, Codable {
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case highlight
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case underline
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}
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public enum RDEPUBAnnotationMenuAction: Equatable {
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case copy
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case highlight
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case annotate
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}
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public struct RDEPUBTextOffsetRangeInfo: Codable, Equatable {
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public var kind: String
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public var href: String
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public var start: Int
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public var end: Int
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public init(href: String, start: Int, end: Int) {
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self.kind = "text-offset"
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self.href = href
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self.start = start
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self.end = end
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}
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public var nsRange: NSRange? {
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guard end > start else { return nil }
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return NSRange(location: start, length: end - start)
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}
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public func jsonString() -> String? {
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guard let data = try? JSONEncoder().encode(self) else { return nil }
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return String(data: data, encoding: .utf8)
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}
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public static func decode(from string: String?) -> RDEPUBTextOffsetRangeInfo? {
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guard let string,
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let data = string.data(using: .utf8),
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let rangeInfo = try? JSONDecoder().decode(RDEPUBTextOffsetRangeInfo.self, from: data),
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rangeInfo.kind == "text-offset",
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rangeInfo.end > rangeInfo.start else {
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return nil
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}
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return rangeInfo
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}
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}
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public struct RDEPUBHighlight: Codable, Equatable {
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public var id: String
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public var bookIdentifier: String?
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public var location: RDEPUBLocation
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public var text: String
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public var rangeInfo: String?
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public var style: RDEPUBHighlightStyle
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public var color: String
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public var note: String?
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public var createdAt: Date
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public init(
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id: String = UUID().uuidString,
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bookIdentifier: String? = nil,
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location: RDEPUBLocation,
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text: String,
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rangeInfo: String? = nil,
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style: RDEPUBHighlightStyle = .highlight,
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color: String = "#F8E16C",
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note: String? = nil,
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createdAt: Date = Date()
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) {
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self.id = id
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self.bookIdentifier = bookIdentifier
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self.location = location
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self.text = text
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self.rangeInfo = rangeInfo?.nilIfEmpty
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self.style = style
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self.color = color
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self.note = note?.nilIfEmpty
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self.createdAt = createdAt
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}
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public var hasNote: Bool {
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note?.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty == false
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}
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private enum CodingKeys: String, CodingKey {
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case id
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case bookIdentifier
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case location
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case text
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case rangeInfo
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case style
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case color
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case note
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case createdAt
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}
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public init(from decoder: Decoder) throws {
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let container = try decoder.container(keyedBy: CodingKeys.self)
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id = try container.decode(String.self, forKey: .id)
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bookIdentifier = try container.decodeIfPresent(String.self, forKey: .bookIdentifier)
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location = try container.decode(RDEPUBLocation.self, forKey: .location)
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text = try container.decode(String.self, forKey: .text)
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rangeInfo = try container.decodeIfPresent(String.self, forKey: .rangeInfo)?.nilIfEmpty
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if let rawStyle = try container.decodeIfPresent(String.self, forKey: .style),
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let decodedStyle = RDEPUBHighlightStyle(rawValue: rawStyle) {
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style = decodedStyle
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} else {
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style = .highlight
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}
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color = try container.decodeIfPresent(String.self, forKey: .color) ?? "#F8E16C"
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note = try container.decodeIfPresent(String.self, forKey: .note)?.nilIfEmpty
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createdAt = try container.decodeIfPresent(Date.self, forKey: .createdAt) ?? Date()
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}
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public func encode(to encoder: Encoder) throws {
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var container = encoder.container(keyedBy: CodingKeys.self)
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try container.encode(id, forKey: .id)
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try container.encodeIfPresent(bookIdentifier, forKey: .bookIdentifier)
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try container.encode(location, forKey: .location)
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try container.encode(text, forKey: .text)
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try container.encodeIfPresent(rangeInfo, forKey: .rangeInfo)
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try container.encode(style, forKey: .style)
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try container.encode(color, forKey: .color)
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try container.encodeIfPresent(note, forKey: .note)
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try container.encode(createdAt, forKey: .createdAt)
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}
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}
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public struct RDEPUBBookmark: Codable, Equatable {
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public var id: String
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public var bookIdentifier: String?
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public var location: RDEPUBLocation
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public var chapterTitle: String?
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public var note: String?
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public var createdAt: Date
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public init(
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id: String = UUID().uuidString,
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bookIdentifier: String? = nil,
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location: RDEPUBLocation,
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chapterTitle: String? = nil,
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note: String? = nil,
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createdAt: Date = Date()
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) {
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self.id = id
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self.bookIdentifier = bookIdentifier
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self.location = location
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self.chapterTitle = chapterTitle?.nilIfEmpty
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self.note = note?.nilIfEmpty
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self.createdAt = createdAt
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}
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public var hasNote: Bool {
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note?.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty == false
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}
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}
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public struct EPUBChapterInfo: Codable, Equatable {
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public var spineIndex: Int
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public var title: String
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public var pageCount: Int
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public init(spineIndex: Int, title: String, pageCount: Int) {
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self.spineIndex = spineIndex
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self.title = title
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self.pageCount = pageCount
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}
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}
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public struct EPUBPage: Codable, Equatable {
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public var spineIndex: Int
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public var chapterIndex: Int
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public var pageIndexInChapter: Int
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public var totalPagesInChapter: Int
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public var chapterTitle: String
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public var fixedSpread: EPUBFixedSpread?
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public init(
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spineIndex: Int,
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chapterIndex: Int,
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pageIndexInChapter: Int,
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totalPagesInChapter: Int,
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chapterTitle: String,
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fixedSpread: EPUBFixedSpread?
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) {
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self.spineIndex = spineIndex
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self.chapterIndex = chapterIndex
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self.pageIndexInChapter = pageIndexInChapter
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self.totalPagesInChapter = totalPagesInChapter
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self.chapterTitle = chapterTitle
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self.fixedSpread = fixedSpread
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}
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}
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public struct EPUBFixedSpreadResource: Codable, Equatable {
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public var spineIndex: Int
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public var href: String
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public var title: String
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public var pageSpread: RDEPUBPageSpread?
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public init(spineIndex: Int, href: String, title: String, pageSpread: RDEPUBPageSpread? = nil) {
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self.spineIndex = spineIndex
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self.href = href
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self.title = title
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self.pageSpread = pageSpread
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}
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}
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public struct EPUBFixedSpread: Codable, Equatable {
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public var resources: [EPUBFixedSpreadResource]
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public init(resources: [EPUBFixedSpreadResource]) {
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self.resources = resources
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}
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public var primaryResource: EPUBFixedSpreadResource {
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resources.first ?? EPUBFixedSpreadResource(spineIndex: 0, href: "", title: "")
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}
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public func contains(normalizedHref: String, normalizer: (String) -> String?) -> Bool {
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resources.contains { resource in
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normalizer(resource.href) == normalizedHref
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}
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}
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public static func makeSpreads(spine: [RDEPUBSpineItem], spreadEnabled: Bool) -> [EPUBFixedSpread] {
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let resources = spine.enumerated().map { index, item in
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EPUBFixedSpreadResource(
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spineIndex: index,
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href: item.href,
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title: item.title,
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pageSpread: item.pageSpread
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)
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}
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guard spreadEnabled, resources.count > 1 else {
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return resources.map { EPUBFixedSpread(resources: [$0]) }
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}
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var spreads: [EPUBFixedSpread] = []
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var cursor = 0
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while cursor < resources.count {
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let current = resources[cursor]
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guard cursor + 1 < resources.count else {
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spreads.append(EPUBFixedSpread(resources: [current]))
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break
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}
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let next = resources[cursor + 1]
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if shouldPair(current: current, next: next) {
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spreads.append(EPUBFixedSpread(resources: [current, next]))
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cursor += 2
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} else {
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spreads.append(EPUBFixedSpread(resources: [current]))
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cursor += 1
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}
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}
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return spreads
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}
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public static func makeSpreads(parser: RDEPUBParser, spreadEnabled: Bool) -> [EPUBFixedSpread] {
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makeSpreads(spine: parser.spine, spreadEnabled: spreadEnabled)
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}
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private static func shouldPair(current: EPUBFixedSpreadResource, next: EPUBFixedSpreadResource) -> Bool {
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if current.pageSpread == .center || next.pageSpread == .center {
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return false
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}
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switch (current.pageSpread, next.pageSpread) {
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case (.left, .right), (.right, .left):
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return true
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case (.left, .left), (.right, .right):
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return false
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default:
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return true
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}
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}
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}
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private extension String {
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var nilIfEmpty: String? {
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let trimmed = trimmingCharacters(in: .whitespacesAndNewlines)
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return trimmed.isEmpty ? nil : trimmed
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}
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}
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Reference in New Issue
Block a user