113 lines
3.9 KiB
Swift
113 lines
3.9 KiB
Swift
import Models
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import SwiftUI
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import Utils
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import Views
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import WebKit
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#if os(iOS)
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struct WebReader: UIViewRepresentable {
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let articleContent: ArticleContentDep
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let item: FeedItem
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let openLinkAction: (URL) -> Void
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let webViewActionHandler: (WKScriptMessage, WKScriptMessageReplyHandler?) -> Void
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let navBarVisibilityRatioUpdater: (Double) -> Void
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@Binding var increaseFontActionID: UUID?
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@Binding var decreaseFontActionID: UUID?
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@Binding var annotationSaveTransactionID: UUID?
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@Binding var annotation: String
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func makeCoordinator() -> WebReaderCoordinator {
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WebReaderCoordinator()
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}
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func fontSize() -> Int {
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let storedSize = UserDefaults.standard.integer(forKey: UserDefaultKey.preferredWebFontSize.rawValue)
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return storedSize <= 1 ? UITraitCollection.current.preferredWebFontSize : storedSize
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}
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func makeUIView(context: Context) -> WKWebView {
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let webView = WebViewManager.shared()
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let contentController = WKUserContentController()
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webView.navigationDelegate = context.coordinator
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webView.isOpaque = false
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webView.backgroundColor = .clear
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webView.configuration.userContentController = contentController
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webView.scrollView.delegate = context.coordinator
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webView.scrollView.contentInset.top = readerViewNavBarHeight
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webView.scrollView.verticalScrollIndicatorInsets.top = readerViewNavBarHeight
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webView.configuration.userContentController.removeAllScriptMessageHandlers()
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for action in WebViewAction.allCases {
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webView.configuration.userContentController.add(context.coordinator, name: action.rawValue)
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}
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webView.configuration.userContentController.add(webView, name: "viewerAction")
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webView.configuration.userContentController.addScriptMessageHandler(
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context.coordinator, contentWorld: .page, name: "articleAction"
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)
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context.coordinator.linkHandler = openLinkAction
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context.coordinator.webViewActionHandler = webViewActionHandler
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context.coordinator.updateNavBarVisibilityRatio = navBarVisibilityRatioUpdater
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loadContent(webView: webView)
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return webView
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}
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func updateUIView(_ webView: WKWebView, context: Context) {
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if annotationSaveTransactionID != context.coordinator.lastSavedAnnotationID {
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context.coordinator.lastSavedAnnotationID = annotationSaveTransactionID
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(webView as? WebView)?.saveAnnotation(annotation: annotation)
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}
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if increaseFontActionID != context.coordinator.previousIncreaseFontActionID {
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context.coordinator.previousIncreaseFontActionID = increaseFontActionID
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(webView as? WebView)?.increaseFontSize()
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}
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if decreaseFontActionID != context.coordinator.previousDecreaseFontActionID {
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context.coordinator.previousDecreaseFontActionID = decreaseFontActionID
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(webView as? WebView)?.decreaseFontSize()
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}
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// If the webview had been terminated `needsReload` will have been set to true
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if context.coordinator.needsReload {
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loadContent(webView: webView)
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context.coordinator.needsReload = false
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return
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}
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if webView.isLoading { return }
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// If the root element is not detected then `WKWebView` may have unloaded the content
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// so we need to load it again.
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webView.evaluateJavaScript("document.getElementById('root') ? true : false") { hasRootElement, _ in
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guard let hasRootElement = hasRootElement as? Bool else { return }
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if !hasRootElement {
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DispatchQueue.main.async {
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loadContent(webView: webView)
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}
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}
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}
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}
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func loadContent(webView: WKWebView) {
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webView.loadHTMLString(
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WebReaderContent(
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articleContent: articleContent,
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item: item,
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isDark: UITraitCollection.current.userInterfaceStyle == .dark,
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fontSize: fontSize()
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)
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.styledContent,
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baseURL: ViewsPackage.bundleURL
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)
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}
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}
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#endif
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