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Code Issues Actions Packages Projects Releases Wiki Activity

Simplify WebView loading on iOS.

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This commit is contained in:
Brent Simmons
2025-04-28 21:00:31 -07:00
parent 0a364c7c00
commit b7d4041781
7 changed files with 59 additions and 235 deletions
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102
iOS/Article/WebViewController.swift
View File

@@ -31,14 +31,15 @@ class WebViewController: UIViewController {
private var topShowBarsViewConstraint: NSLayoutConstraint!
private var bottomShowBarsViewConstraint: NSLayoutConstraint!
private var webView: PreloadedWebView? {
return view.subviews[0] as? PreloadedWebView
var webView: WKWebView? {
return view.subviews[0] as? WKWebView
}
private lazy var contextMenuInteraction = UIContextMenuInteraction(delegate: self)
private var isFullScreenAvailable: Bool {
return AppDefaults.shared.articleFullscreenAvailable && traitCollection.userInterfaceIdiom == .phone && coordinator.isRootSplitCollapsed
}
private lazy var articleIconSchemeHandler = ArticleIconSchemeHandler(coordinator: coordinator);
private lazy var transition = ImageTransition(controller: self)
private var clickedImageCompletion: (() -> Void)?
@@ -351,14 +352,6 @@ extension WebViewController: UIContextMenuInteractionDelegate {
extension WebViewController: WKNavigationDelegate {
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
for (index, view) in view.subviews.enumerated() {
if index != 0, let oldWebView = view as? PreloadedWebView {
oldWebView.removeFromSuperview()
}
}
}
func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
if navigationAction.navigationType == .linkActivated {
@@ -519,49 +512,57 @@ private extension WebViewController {
return
}
coordinator.webViewProvider.dequeueWebView() { webView in
webView.ready {
// Add the webview
webView.translatesAutoresizingMaskIntoConstraints = false
self.view.insertSubview(webView, at: 0)
NSLayoutConstraint.activate([
self.view.leadingAnchor.constraint(equalTo: webView.leadingAnchor),
self.view.trailingAnchor.constraint(equalTo: webView.trailingAnchor),
self.view.topAnchor.constraint(equalTo: webView.topAnchor),
self.view.bottomAnchor.constraint(equalTo: webView.bottomAnchor)
])
// UISplitViewController reports the wrong size to WKWebView which can cause horizontal
// rubberbanding on the iPad. This interferes with our UIPageViewController preventing
// us from easily swiping between WKWebViews. This hack fixes that.
webView.scrollView.contentInset = UIEdgeInsets(top: 0, left: -1, bottom: 0, right: 0)
let preferences = WKPreferences()
preferences.javaScriptCanOpenWindowsAutomatically = false
webView.scrollView.setZoomScale(1.0, animated: false)
/// The defaults for `preferredContentMode` and `allowsContentJavaScript` are suitable
/// and don't need to be explicitly set.
/// `allowsContentJavaScript` replaces `WKPreferences.javascriptEnabled`.
let webpagePreferences = WKWebpagePreferences()
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
// Configure the webview
webView.navigationDelegate = self
webView.uiDelegate = self
webView.scrollView.delegate = self
self.configureContextMenuInteraction()
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasClicked)
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasShown)
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.showFeedInspector)
self.renderPage(webView)
}
let configuration = WKWebViewConfiguration()
configuration.defaultWebpagePreferences = webpagePreferences
configuration.preferences = preferences
configuration.setValue(true, forKey: "allowUniversalAccessFromFileURLs")
configuration.allowsInlineMediaPlayback = true
configuration.mediaTypesRequiringUserActionForPlayback = .audio
if #available(iOS 15.4, *) {
configuration.preferences.isElementFullscreenEnabled = true
}
configuration.setURLSchemeHandler(articleIconSchemeHandler, forURLScheme: ArticleRenderer.imageIconScheme)
let webView = WKWebView(frame: self.view.bounds, configuration: configuration)
webView.isOpaque = false;
webView.backgroundColor = .clear;
// Add the webview - using autolayout will cause fullscreen video to fail and lose the web view
webView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
self.view.insertSubview(webView, at: 0)
// UISplitViewController reports the wrong size to WKWebView which can cause horizontal
// rubberbanding on the iPad. This interferes with our UIPageViewController preventing
// us from easily swiping between WKWebViews. This hack fixes that.
webView.scrollView.contentInset = UIEdgeInsets(top: 0, left: -1, bottom: 0, right: 0)
webView.scrollView.setZoomScale(1.0, animated: false)
self.view.setNeedsLayout()
self.view.layoutIfNeeded()
// Configure the webview
webView.navigationDelegate = self
webView.uiDelegate = self
webView.scrollView.delegate = self
self.configureContextMenuInteraction()
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasClicked)
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasShown)
webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.showFeedInspector)
self.renderPage(webView)
}
func renderPage(_ webView: PreloadedWebView?) {
func renderPage(_ webView: WKWebView?) {
guard let webView = webView else { return }
let theme = ArticleThemesManager.shared.currentTheme
@@ -591,7 +592,8 @@ private extension WebViewController {
"windowScrollY": String(windowScrollY)
]
let html = try! MacroProcessor.renderedText(withTemplate: ArticleRenderer.page.html, substitutions: substitutions)
var html = try! MacroProcessor.renderedText(withTemplate: ArticleRenderer.page.html, substitutions: substitutions)
html = ArticleRenderingSpecialCases.filterHTMLIfNeeded(baseURL: rendering.baseURL, html: html)
webView.loadHTMLString(html, baseURL: ArticleRenderer.page.baseURL)
}