only http for the url previews

amethyst/src/main/java/com/vitorpamplona/amethyst/service/CachedRichTextParser.kt

@@ -79,7 +79,7 @@ object CachedUrlParser {
             cached
         } else {
             val urlSet = UrlParser().parseValidUrls(content)
-            val newUrls = urlSet.withScheme.toList() + urlSet.withoutScheme.map { "http://$it" }
+            val newUrls = urlSet.withScheme.filter { it.startsWith("http") } + urlSet.withoutScheme.map { "http://$it" }
             parsedUrlsCache.put(key, newUrls)
             newUrls
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/creators/previews/PreviewState.kt

@@ -39,8 +39,9 @@ class PreviewState {
     val results =
         source
             .debounce(500)
-            .map { CachedUrlParser.parseValidUrls(it.text) }
-            .distinctUntilChanged()
+            .map {
+                CachedUrlParser.parseValidUrls(it.text)
+            }.distinctUntilChanged()
             .flowOn(Dispatchers.IO)
 
     fun reset() {