195 lines
6.7 KiB
Swift
195 lines
6.7 KiB
Swift
//
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// ReadViewController.swift
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// Reader
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//
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// Created by Shadowfacts on 1/9/22.
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//
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import UIKit
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import WebKit
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import HTMLEntities
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import SafariServices
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class ReadViewController: UIViewController {
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private static let publishedFormatter: DateFormatter = {
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let f = DateFormatter()
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f.dateStyle = .medium
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f.timeStyle = .medium
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return f
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}()
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let fervorController: FervorController
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let item: Item
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override var prefersStatusBarHidden: Bool {
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navigationController?.isNavigationBarHidden ?? false
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}
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override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation {
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.slide
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}
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init(item: Item, fervorController: FervorController) {
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self.fervorController = fervorController
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self.item = item
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super.init(nibName: nil, bundle: nil)
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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 viewDidLoad() {
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super.viewDidLoad()
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navigationItem.largeTitleDisplayMode = .never
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view.backgroundColor = .appBackground
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view.addInteraction(StretchyMenuInteraction(delegate: self))
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let webView = WKWebView()
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webView.translatesAutoresizingMaskIntoConstraints = false
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webView.navigationDelegate = self
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webView.uiDelegate = self
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// transparent background required to prevent white flash in dark mode, just using .appBackground doesn't work
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webView.isOpaque = false
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webView.backgroundColor = .clear
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if let content = itemContentHTML() {
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webView.loadHTMLString(content, baseURL: item.url)
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}
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view.addSubview(webView)
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NSLayoutConstraint.activate([
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webView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
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webView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
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webView.topAnchor.constraint(equalTo: view.topAnchor),
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webView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
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])
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}
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private static let css = try! String(contentsOf: Bundle.main.url(forResource: "read", withExtension: "css")!)
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private func itemContentHTML() -> String? {
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guard let content = item.content else {
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return nil
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}
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var info = ""
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if let title = item.title, !title.isEmpty {
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info += "<h1 id=\"item-title\">"
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if let url = item.url {
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info += "<a href=\"\(url.absoluteString)\">"
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}
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info += title.htmlEscape()
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if item.url != nil {
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info += "</a>"
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}
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info += "</h1>"
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}
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if let feedTitle = item.feed!.title, !feedTitle.isEmpty {
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info += "<h2 id=\"item-feed-title\">\(feedTitle.htmlEscape())</h2>"
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}
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if let author = item.author, !author.isEmpty {
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info += "<h3 id=\"item-author\">\(author)</h3>"
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}
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if let published = item.published {
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let formatted = ReadViewController.publishedFormatter.string(from: published)
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info += "<h3 id=\"item-published\">\(formatted)</h3>"
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}
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return """
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" />
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<style>\(ReadViewController.css)</style>
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</head>
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<body>
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<div id="item-info">
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\(info)
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</div>
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<div id="item-content">
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\(content)
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</div>
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</body>
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</html>
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"""
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}
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private func createSafariVC(url: URL) -> SFSafariViewController {
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let vc = SFSafariViewController(url: url)
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vc.preferredControlTintColor = .appTintColor
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return vc
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}
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}
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extension ReadViewController: WKNavigationDelegate {
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func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction) async -> WKNavigationActionPolicy {
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if navigationAction.navigationType == .linkActivated {
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let url = navigationAction.request.url!
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present(createSafariVC(url: url), animated: true)
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return .cancel
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} else {
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return .allow
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}
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}
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}
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extension ReadViewController: WKUIDelegate {
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func webView(_ webView: WKWebView, contextMenuConfigurationFor elementInfo: WKContextMenuElementInfo) async -> UIContextMenuConfiguration? {
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guard let url = elementInfo.linkURL,
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["http", "https"].contains(url.scheme?.lowercased()) else {
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return nil
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}
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return UIContextMenuConfiguration(identifier: nil) { [unowned self] in
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self.createSafariVC(url: url)
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} actionProvider: { _ in
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return UIMenu(children: [
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UIAction(title: "Open in Safari", image: UIImage(systemName: "safari"), handler: { [weak self] _ in
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guard let self = self else { return }
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self.present(self.createSafariVC(url: url), animated: true)
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}),
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UIAction(title: "Share", image: UIImage(systemName: "square.and.arrow.up"), handler: { [weak self] _ in
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self?.present(UIActivityViewController(activityItems: [url], applicationActivities: nil), animated: true)
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}),
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])
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}
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}
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func webView(_ webView: WKWebView, contextMenuForElement elementInfo: WKContextMenuElementInfo, willCommitWithAnimator animator: UIContextMenuInteractionCommitAnimating) {
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if let vc = animator.previewViewController as? SFSafariViewController {
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animator.preferredCommitStyle = .pop
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animator.addCompletion {
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self.present(vc, animated: true)
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}
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}
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}
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}
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extension ReadViewController: StretchyMenuInteractionDelegate {
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func stretchyMenuTitle() -> String? {
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return nil
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}
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func stretchyMenuItems() -> [StretchyMenuItem] {
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guard let url = item.url else {
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return []
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}
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return [
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StretchyMenuItem(title: "Open in Safari", subtitle: nil, action: { [unowned self] in
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self.present(createSafariVC(url: url), animated: true)
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}),
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StretchyMenuItem(title: "Share", subtitle: nil, action: { [unowned self] in
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self.present(UIActivityViewController(activityItems: [url], applicationActivities: nil), animated: true)
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}),
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StretchyMenuItem(title: item.read ? "Mark as Unread" : "Mark as Read", subtitle: nil, action: { [unowned self] in
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item.read = !item.read
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}),
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]
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}
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}
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