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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
import Common
import Foundation
/// Lifecycle manager purpose is to properly activate or deactive engine sessions whenever they
/// are shown or removed from the engine view
protocol WKSessionLifecycleManager {
func activate(_ session: WKEngineSession)
func deactivate(_ session: WKEngineSession)
}
struct DefaultWKSessionLifecycleManager: WKSessionLifecycleManager {
private var notificationCenter: NotificationProtocol = NotificationCenter.default
func activate(_ session: WKEngineSession) {
session.isActive = true
// TODO: FXIOS-11420 - Handle PDF loading view in WebEngine
// if selectedTab.isDownloadingDocument() {
// navigationHandler?.showDocumentLoading()
// } else {
// navigationHandler?.removeDocumentLoading()
// }
// TODO: FXIOS-12073 - Ensure newly selected session is properly themed
// selectedTab.webView?.applyTheme(theme: currentTheme())
// When the newly selected tab is the homepage or another internal tab,
// we need to explicitly set the reader mode state to be unavailable.
let readerModeState: ReaderModeState
if let url = session.webView.url, WKInternalURL.scheme != url.scheme {
readerModeState = session.sessionData.readerModeState ?? .unavailable
} else {
readerModeState = .unavailable
}
notificationCenter.post(
name: .ReaderModeSessionChanged,
withObject: nil,
withUserInfo: [EngineConstants.isPrivateKey: session.sessionData.isPrivate ?? false,
EngineConstants.readerModeStateKey: readerModeState]
)
// TODO: FXIOS-12074 - Handle needs reload when selected tab changed
// if webView.url == nil {
// // The webView can go gray if it was zombified due to memory pressure.
// // When this happens, the URL is nil, so try restoring the page upon selection.
// needsReload = true
// }
// /// If the selectedTab is showing an error page trigger a reload
// if let url = selectedTab.url, let internalUrl = InternalURL(url), internalUrl.isErrorPage {
// needsReload = true
// }
//
// if needsReload {
// selectedTab.reloadPage()
// }
}
func deactivate(_ session: WKEngineSession) {
session.isActive = false
// Remove the old accessibilityLabel. Since this webview shouldn't be visible, it doesn't need it
// and having multiple views with the same label confuses tests.
let previousWebView = session.webView
previousWebView.endEditing(true)
previousWebView.accessibilityLabel = nil
previousWebView.accessibilityElementsHidden = true
previousWebView.accessibilityIdentifier = nil
previousWebView.removeFromSuperview()
}
}