121 lines
4.9 KiB
Swift
121 lines
4.9 KiB
Swift
import UIKit
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// MARK: - Web 内容视图代理
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/// Web 内容视图的代理协议
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/// 将 WebView 中的事件（位置更新、文本选择、链接点击等）转发给控制器
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protocol RDEPUBWebContentViewDelegate: AnyObject {
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/// WebView 中阅读位置更新时调用
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didUpdateLocation location: RDEPUBLocation, spineIndex: Int)
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/// WebView 中文本选择变化时调用
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didChangeSelection selection: RDEPUBSelection?, spineIndex: Int)
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/// 用户从选择菜单中触发操作
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didRequestSelectionAction action: RDEPUBAnnotationMenuAction)
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/// 用户点击内部链接（章节跳转）
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didActivateInternalLink location: RDEPUBLocation, fromSpineIndex: Int)
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/// 用户点击外部链接
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didActivateExternalLink url: URL)
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/// WebView 中 JavaScript 执行出错
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func epubWebContentView(_ contentView: RDEPUBWebContentView, didLogJavaScriptError message: String)
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}
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// MARK: - Web 内容视图
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/// EPUB 固定布局和 Web 渲染路径的内容视图
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/// 包装 RDEPUBWebView，提供页码标签和加载/释放资源的控制
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/// 适用于固定布局 EPUB 和不支持 Native Text 的场景
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final class RDEPUBWebContentView: UIView {
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weak var delegate: RDEPUBWebContentViewDelegate?
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private let epubWebView = RDEPUBWebView()
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private let decorationOverlayView = RDEPUBWebDecorationOverlayView()
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private let pageNumberLabel: UILabel = {
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let label = UILabel()
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label.font = UIFont.systemFont(ofSize: 13)
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return label
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}()
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override init(frame: CGRect) {
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super.init(frame: frame)
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clipsToBounds = true
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layer.masksToBounds = true
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addSubview(epubWebView)
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addSubview(decorationOverlayView)
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addSubview(pageNumberLabel)
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epubWebView.delegate = self
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epubWebView.onDecorationsResolved = { [weak self] decorations in
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self?.decorationOverlayView.applyDecorations(decorations)
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}
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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epubWebView.frame = bounds
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decorationOverlayView.frame = bounds
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let labelSize = pageNumberLabel.sizeThatFits(CGSize(width: bounds.width, height: 20))
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pageNumberLabel.frame = CGRect(
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x: bounds.width - labelSize.width - 24,
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y: bounds.height - labelSize.height - 20,
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width: labelSize.width,
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height: labelSize.height
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)
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}
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func configure(
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publication: RDEPUBPublication,
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request: RDEPUBRenderRequest,
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pageNumber: Int,
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totalPages: Int,
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theme: RDEPUBReaderTheme
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) {
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backgroundColor = theme.contentBackgroundColor
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pageNumberLabel.textColor = theme.contentTextColor
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pageNumberLabel.text = "\(pageNumber) / \(totalPages)"
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decorationOverlayView.applyDecorations([])
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epubWebView.load(publication: publication, request: request)
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setNeedsLayout()
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}
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func releaseResources() {
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decorationOverlayView.applyDecorations([])
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epubWebView.reset()
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epubWebView.delegate = self
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epubWebView.onDecorationsResolved = { [weak self] decorations in
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self?.decorationOverlayView.applyDecorations(decorations)
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}
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}
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}
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extension RDEPUBWebContentView: RDEPUBWebViewDelegate {
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func epubWebView(_ webView: RDEPUBWebView, didUpdateLocation location: RDEPUBLocation, spineIndex: Int) {
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delegate?.epubWebContentView(self, didUpdateLocation: location, spineIndex: spineIndex)
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}
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func epubWebView(_ webView: RDEPUBWebView, didChangeSelection selection: RDEPUBSelection?, spineIndex: Int) {
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delegate?.epubWebContentView(self, didChangeSelection: selection, spineIndex: spineIndex)
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}
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func epubWebView(_ webView: RDEPUBWebView, didRequestSelectionAction action: RDEPUBAnnotationMenuAction) {
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delegate?.epubWebContentView(self, didRequestSelectionAction: action)
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}
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func epubWebView(_ webView: RDEPUBWebView, didActivateInternalLink location: RDEPUBLocation, fromSpineIndex: Int) {
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delegate?.epubWebContentView(self, didActivateInternalLink: location, fromSpineIndex: fromSpineIndex)
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}
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func epubWebView(_ webView: RDEPUBWebView, didActivateExternalLink url: URL) {
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delegate?.epubWebContentView(self, didActivateExternalLink: url)
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}
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func epubWebView(_ webView: RDEPUBWebView, didLogJavaScriptError message: String) {
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delegate?.epubWebContentView(self, didLogJavaScriptError: message)
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}
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func epubWebViewDidFinishRendering(_ webView: RDEPUBWebView) {}
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}
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