Reload spreads when the WebView is terminated (#311)

Author: triin-ko

CHANGELOG.md

@@ -26,6 +26,8 @@ All notable changes to this project will be documented in this file. Take a look
 * Fixed crash in the `PublicationSpeechSynthesizer` when closing the navigator without stopping it first.
 * Fixed the audio session kept opened while the app is in the background and paused.
 * Fixed the **Attribute dir redefined** error when the EPUB resource already has a `dir` attribute.
+* [#309](https://github.com/readium/swift-toolkit/issues/309) Fixed restoring the EPUB location when the application was killed in the background (contributed by [@triin-ko](https://github.com/readium/swift-toolkit/pull/311)).
+
 
 ## [2.5.0]
 

Sources/Navigator/EPUB/EPUBNavigatorViewController.swift

@@ -1052,6 +1052,10 @@ extension EPUBNavigatorViewController: EPUBSpreadViewDelegate {
     func spreadView(_ spreadView: EPUBSpreadView, present viewController: UIViewController) {
         present(viewController, animated: true)
     }
+
+    func spreadViewDidTerminate() {
+        reloadSpreads(force: true)
+    }
 }
 
 extension EPUBNavigatorViewController: EditingActionsControllerDelegate {

Sources/Navigator/EPUB/EPUBSpreadView.swift

@@ -38,6 +38,9 @@ protocol EPUBSpreadViewDelegate: AnyObject {
 
     /// Called when the user released a key and it was not handled by the resource.
     func spreadView(_ spreadView: EPUBSpreadView, didReleaseKey event: KeyEvent)
+
+    /// Called when WKWebview terminates
+    func spreadViewDidTerminate()
 }
 
 class EPUBSpreadView: UIView, Loggable, PageView {
@@ -468,6 +471,10 @@ extension EPUBSpreadView: WKNavigationDelegate {
 
         decisionHandler(policy)
     }
+
+    func webViewWebContentProcessDidTerminate(_ webView: WKWebView) {
+        delegate?.spreadViewDidTerminate()
+    }
 }
 
 extension EPUBSpreadView: UIScrollViewDelegate {