new: extract WebView feature module

2026-07-08 14:20:32 +02:00
parent f6a12ad84a
commit 0151d92b6a
23 changed files with 116 additions and 32 deletions
@@ -1,119 +0,0 @@
-package bzh.ajaury.chombev.web.ui
-
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.remember
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.interop.UIKitView
-import kotlinx.cinterop.ExperimentalForeignApi
-import kotlinx.cinterop.ObjCSignatureOverride
-import platform.CoreGraphics.CGRectZero
-import platform.Foundation.NSError
-import platform.Foundation.NSURL
-import platform.Foundation.NSURLRequest
-import platform.UIKit.UIUserInterfaceStyle
-import platform.UIKit.UIUserInterfaceStyle.UIUserInterfaceStyleDark
-import platform.UIKit.UIUserInterfaceStyle.UIUserInterfaceStyleLight
-import platform.WebKit.WKNavigation
-import platform.WebKit.WKNavigationDelegateProtocol
-import platform.WebKit.WKWebView
-import platform.WebKit.WKWebViewConfiguration
-import platform.darwin.NSObject
-
-@OptIn(ExperimentalForeignApi::class)
-@Composable
-actual fun PlatformWebView(
-    url: String,
-    offlineHtml: String?,
-    darkTheme: Boolean,
-    onLoadingStateChange: (Boolean) -> Unit,
-    modifier: Modifier,
-) {
-    // WKWebView holds its navigationDelegate weakly, so keep a strong reference across recompositions.
-    val navigationDelegate = remember { WebViewNavigationDelegate() }
-    navigationDelegate.onLoadingStateChange = onLoadingStateChange
-    navigationDelegate.offlineHtml = offlineHtml
-    navigationDelegate.baseUrl = url
-
-    UIKitView(
-        modifier = modifier,
-        factory = {
-            WKWebView(
-                frame = CGRectZero.readValue(),
-                configuration = WKWebViewConfiguration(),
-            ).apply {
-                navigationDelegate = navigationDelegate
-                setOverrideUserInterfaceStyle(darkTheme.toInterfaceStyle())
-                NSURL.URLWithString(url)?.let { nsUrl ->
-                    loadRequest(NSURLRequest(uRL = nsUrl))
-                }
-            }
-        },
-        // Re-apply on recomposition so a light/dark switch takes effect without reloading the page.
-        update = { webView ->
-            webView.setOverrideUserInterfaceStyle(darkTheme.toInterfaceStyle())
-        },
-    )
-}
-
-/**
- * Forwards WKWebView load lifecycle events to [onLoadingStateChange] so the UI can show a loader
- * while a page is loading and hide it once loading finishes.
- *
- * When a navigation fails, it swaps in [offlineHtml] (loaded against [baseUrl] so links resolve) so
- * the page still shows content offline. [showingOffline] guards against re-entering the fallback.
- */
-private class WebViewNavigationDelegate :
-    NSObject(),
-    WKNavigationDelegateProtocol {
-    var onLoadingStateChange: (Boolean) -> Unit = {}
-    var offlineHtml: String? = null
-    var baseUrl: String = ""
-
-    private var showingOffline = false
-
-    override fun webView(
-        webView: WKWebView,
-        didStartProvisionalNavigation: WKNavigation?,
-    ) {
-        onLoadingStateChange(true)
-    }
-
-    // Shares the (WKWebView, WKNavigation?) Kotlin signature with didStartProvisionalNavigation above.
-    @ObjCSignatureOverride
-    override fun webView(
-        webView: WKWebView,
-        didFinishNavigation: WKNavigation?,
-    ) {
-        onLoadingStateChange(false)
-    }
-
-    override fun webView(
-        webView: WKWebView,
-        didFailNavigation: WKNavigation?,
-        withError: NSError,
-    ) {
-        handleFailure(webView)
-    }
-
-    // Shares the (WKWebView, WKNavigation?, NSError) Kotlin signature with didFailNavigation above.
-    @ObjCSignatureOverride
-    override fun webView(
-        webView: WKWebView,
-        didFailProvisionalNavigation: WKNavigation?,
-        withError: NSError,
-    ) {
-        handleFailure(webView)
-    }
-
-    private fun handleFailure(webView: WKWebView) {
-        val html = offlineHtml
-        if (html != null && !showingOffline) {
-            showingOffline = true
-            webView.loadHTMLString(string = html, baseURL = NSURL.URLWithString(baseUrl))
-        } else {
-            onLoadingStateChange(false)
-        }
-    }
-}
-
-private fun Boolean.toInterfaceStyle(): UIUserInterfaceStyle = if (this) UIUserInterfaceStyleDark else UIUserInterfaceStyleLight