54798ba578
- 给全部 78 个 Swift 源文件添加详细的中文注释（文件级、类级、方法级） - 删除 LegacyRDReaderController/ 死代码目录（16 文件 4592 行） - 根目录翻页容器文件移入 ReaderView/ 目录 - Resources/ 移入 EPUBCore/Resources/（与使用者归属一致） - RDEPUBTextIndexTable.swift 移入 EPUBTextRendering/（消除反向依赖） - RDURLReaderController.swift 移入 EPUBUI/（入口控制器归入 UI 层） - 更新 podspec 资源路径
64 lines
3.2 KiB
Swift
64 lines
3.2 KiB
Swift
// RDEPUBFixedLayoutTemplate.swift
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// 固定版式（Fixed Layout）HTML 模板生成器
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// 根据渲染请求和 Publication 信息，将 iframe 拼装到 HTML 模板中，
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// 生成适配视口尺寸和内边距的固定版式页面 HTML。
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import Foundation
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/// 固定版式模板生成器，负责将 spine 资源渲染为 iframe 嵌套的 HTML 页面
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enum RDEPUBFixedLayoutTemplate {
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/// 根据渲染请求和 Publication 生成固定版式页面的完整 HTML
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/// - Parameters:
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/// - request: 固定版式渲染请求（含 spread、视口尺寸、内边距、适配模式等）
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/// - publication: EPUB 出版物，用于解析资源 URL
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/// - Returns: 完整的 HTML 字符串
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static func html(for request: RDEPUBFixedRenderRequest, publication: RDEPUBPublication) -> String {
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// 遍历 spread 中的每个资源，生成对应的 iframe pane HTML
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let panes = request.spread.resources.enumerated().compactMap { index, resource -> String? in
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guard let url = publication.resourceResolver.resourceURL(forRelativePath: resource.href)?.absoluteString else {
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return nil
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}
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// 根据 spread 中的资源数量判断页面类型：单页/左页/右页/居中
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let pageType: String
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if request.spread.resources.count == 1 {
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pageType = "single"
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} else if request.spread.resources.count == 2 {
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pageType = index == 0 ? "left" : "right"
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} else {
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pageType = "center"
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}
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return """
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<div class=\"ss-fixed-viewport\" data-page-type=\"\(pageType)\">
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<iframe class=\"ss-fixed-page\" data-page-type=\"\(pageType)\" scrolling=\"no\" src=\"\(url)\"></iframe>
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</div>
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"""
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}.joined()
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// 计算视口区域（去除内边距后的可用区域）
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let background = request.backgroundColorCSS ?? "#FFFFFF"
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let viewportWidth = max(1, Int((request.viewportSize.width - request.contentInset.left - request.contentInset.right).rounded(.down)))
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let viewportHeight = max(1, Int((request.viewportSize.height - request.contentInset.top - request.contentInset.bottom).rounded(.down)))
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let insetTop = Int(request.contentInset.top.rounded(.down))
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let insetRight = Int(request.contentInset.right.rounded(.down))
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let insetBottom = Int(request.contentInset.bottom.rounded(.down))
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let insetLeft = Int(request.contentInset.left.rounded(.down))
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// 从资源仓库加载 HTML 模板并替换占位符
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return RDEPUBAssetRepository.string(
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for: .fixedLayoutTemplate,
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replacements: [
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"BACKGROUND": background,
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"INSET_TOP": String(insetTop),
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"INSET_RIGHT": String(insetRight),
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"INSET_BOTTOM": String(insetBottom),
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"INSET_LEFT": String(insetLeft),
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"VIEWPORT_WIDTH": String(viewportWidth),
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"VIEWPORT_HEIGHT": String(viewportHeight),
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"PANES": panes,
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"FIT_MODE": request.fit.rawValue,
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"FIXED_LAYOUT_READY_MESSAGE": RDEPUBJavaScriptBridgeMessage.fixedLayoutReady.rawValue
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]
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)
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}
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} |