Avoids flickering the screen when the update from Loading to Loaded happens on cached objects.

app/src/main/java/com/vitorpamplona/amethyst/ui/components/UrlPreview.kt

@@ -16,11 +16,14 @@ import kotlinx.coroutines.withContext
 
 
 @Composable
-fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
-  var urlPreviewState by remember { mutableStateOf<UrlPreviewState>(UrlPreviewState.Loading) }
+fun UrlPreview(url: String, urlText: String) {
+  val default = UrlCachedPreviewer.cache[url]?.let { UrlPreviewState.Loaded(it) } ?: UrlPreviewState.Loading
+
+  var urlPreviewState by remember { mutableStateOf(default) }
 
   // Doesn't use a viewModel because of viewModel reusing issues (too many UrlPreview are created).
   LaunchedEffect(url) {
+    if (urlPreviewState == UrlPreviewState.Loading) {
       withContext(Dispatchers.IO) {
         UrlCachedPreviewer.previewInfo(url, object : IUrlPreviewCallback {
           override fun onComplete(urlInfo: UrlInfoItem) {
@@ -31,11 +34,13 @@ fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
           }
 
           override fun onFailed(throwable: Throwable) {
-          urlPreviewState = UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
+            urlPreviewState =
+              UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
           }
         })
       }
     }
+  }
 
   Crossfade(targetState = urlPreviewState, animationSpec = tween(durationMillis = 100)) { state ->
     when (state) {
@@ -43,12 +48,10 @@ fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
         UrlPreviewCard(url, state.previewInfo)
       }
       else -> {
-        if (showUrlIfError) {
         ClickableUrl(urlText, url)
       }
     }
   }
-  }
 
 }