PageAdapter: show URL schemes on links

Currently only show them on absolute URLs and if they are not Gemini
links (https, gopher, etc).

app/src/main/java/dev/lowrespalmtree/comet/PageAdapter.kt

@@ -154,10 +154,19 @@ class PageAdapter(private val listener: Listener) :
                 }
             }
             is ContentBlock.Link -> {
+                val uri = Uri.parse(block.url)
                 val label = block.label.ifBlank { block.url }
                 (holder as ContentViewHolder.Link).binding.textView.text = label
                 holder.binding.root.setOnClickListener { listener.onLinkClick(block.url) }
 
+                // Add the protocol on the right view if available and necessary (i.e. not Gemini).
+                if (uri.isAbsolute && uri.scheme != null && uri.scheme != "gemini") {
+                    holder.binding.protocolView.text = uri.scheme
+                    holder.binding.protocolView.visibility = View.VISIBLE
+                } else {
+                    holder.binding.protocolView.visibility = View.GONE
+                }
+
                 // Color links differently if it has been already visited or not.
                 val resources = holder.binding.root.context.resources
                 holder.binding.textView.setTextColor(

app/src/main/res/layout/gemtext_link.xml

@@ -1,6 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
-<TextView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/text_view"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    style="@style/CometLink" />
+    android:layout_height="wrap_content">
+
+    <TextView
+        android:id="@+id/text_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentStart="true"
+        android:layout_toStartOf="@id/protocol_view"
+        style="@style/CometLink" />
+
+    <TextView
+        android:id="@+id/protocol_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignBaseline="@id/text_view"
+        android:layout_alignParentEnd="true"
+        style="@style/CometText"
+        android:textColor="@color/text_light"
+        android:textStyle="italic"
+        android:textIsSelectable="false" />
+
+</RelativeLayout>