1 files changed, 112 insertions, 0 deletions
diff --git a/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt b/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt
new file mode 100644
index 0000000..ff764c4
--- /dev/null
+++ b/app/src/main/java/org/terst/feedreader/ui/LinkReaderScreen.kt
@@ -0,0 +1,112 @@
+package org.terst.feedreader.ui
+
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.filled.OpenInBrowser
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import org.terst.feedreader.readability.ReaderExtractor
+
+/**
+ * A lightweight, non-persisted reader view for links tapped inside an article's
+ * WebView -- extracts the linked page with the same Readability pipeline as the
+ * main reader, but doesn't touch the DB (it's not a subscribed article), and
+ * recursively re-opens itself for any further links tapped inside, so link-hopping
+ * stays inside the app's reader instead of dropping into a raw WebView or the
+ * system browser.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun LinkReaderScreen(url: String, onBack: () -> Unit, onOpenLink: (String) -> Unit) {
+    val context = LocalContext.current
+    var title by remember(url) { mutableStateOf<String?>(null) }
+    var content by remember(url) { mutableStateOf<String?>(null) }
+    var failed by remember(url) { mutableStateOf(false) }
+
+    LaunchedEffect(url) {
+        val extracted = ReaderExtractor.extract(context, url)
+        val extractedContent = extracted?.content
+        if (extractedContent != null) {
+            title = extracted.title
+            content = extractedContent
+        } else {
+            failed = true
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    Text(title ?: Uri.parse(url).host ?: "Article", maxLines = 1, overflow = TextOverflow.Ellipsis)
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.Default.ArrowBack, contentDescription = "Back")
+                    }
+                },
+                actions = {
+                    IconButton(onClick = {
+                        context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)))
+                    }) {
+                        Icon(Icons.Default.OpenInBrowser, contentDescription = "Open in browser")
+                    }
+                }
+            )
+        }
+    ) { padding ->
+        Box(modifier = Modifier.fillMaxSize().padding(padding)) {
+            val currentContent = content
+            when {
+                currentContent != null -> {
+                    val loadedContent = remember(url) { mutableStateOf<String?>(null) }
+                    AndroidView(
+                        modifier = Modifier.fillMaxSize(),
+                        factory = { ctx ->
+                            newReaderWebView(ctx, onOpenLink).apply {
+                                loadDataWithBaseURL(url, wrapReaderHtml(currentContent), "text/html", "UTF-8", null)
+                                loadedContent.value = currentContent
+                            }
+                        },
+                        update = { webView ->
+                            if (loadedContent.value != currentContent) {
+                                webView.loadDataWithBaseURL(url, wrapReaderHtml(currentContent), "text/html", "UTF-8", null)
+                                loadedContent.value = currentContent
+                            }
+                        },
+                        onRelease = { webView -> webView.destroy() }
+                    )
+                }
+                failed -> Text(
+                    "Couldn't extract a reader view for this page -- try \"Open in browser\" instead.",
+                    modifier = Modifier.align(Alignment.Center).padding(24.dp),
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                else -> CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+            }
+        }
+    }
+}