PageViewModel: use appropriate client certs

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

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

@@ -13,7 +13,7 @@ interface Line
 class EmptyLine : Line
 class ParagraphLine(val text: String) : Line
 class TitleLine(val level: Int, val text: String) : Line
-class LinkLine(val url: String, val label: String) : Line
+class LinkLine(val url: String, val label: String, var visited: Boolean = false) : Line
 class PreFenceLine(val caption: String) : Line
 class PreTextLine(val text: String) : Line
 class BlockquoteLine(val text: String) : Line
@@ -21,7 +21,7 @@ class ListItemLine(val text: String) : Line
 
 private const val TAG = "Gemtext"
 
-/** Pipe incoming gemtext data into parsed Lines. */
+/** Pipe incoming Gemtext data into parsed Lines. */
 fun parseData(
     inChannel: Channel<ByteArray>,
     charset: Charset,

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

@@ -38,6 +38,10 @@ object History {
             dao.update(entry.also { it.title = title; it.lastVisit = now })
     }
 
+    suspend fun contains(uri: String): Boolean = get(uri) != null
+
+    suspend fun get(uri: String): HistoryEntry? = Database.INSTANCE.historyEntryDao().get(uri)
+
     suspend fun getAll(): List<HistoryEntry> = Database.INSTANCE.historyEntryDao().getAll()
 
     suspend fun getLast(): HistoryEntry? = Database.INSTANCE.historyEntryDao().getLast()

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

@@ -1,13 +1,14 @@
 package dev.lowrespalmtree.comet
 
 import android.annotation.SuppressLint
+import android.text.format.DateFormat
 import android.view.LayoutInflater
-import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import dev.lowrespalmtree.comet.History.HistoryEntry
 import dev.lowrespalmtree.comet.databinding.FragmentHistoryItemBinding
 import dev.lowrespalmtree.comet.utils.getFancySelectBgRes
+import java.util.*
 
 class HistoryAdapter(private val listener: Listener) :
     RecyclerView.Adapter<HistoryAdapter.ViewHolder>() {
@@ -27,12 +28,17 @@ class HistoryAdapter(private val listener: Listener) :
         )
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        val item = items[position]
-        holder.binding.uriText.text = item.uri
-        holder.binding.titleText.visibility =
-            if (item.title.isNullOrBlank()) View.GONE else View.VISIBLE
-        holder.binding.titleText.text = item.title ?: ""
-        holder.binding.container.setOnClickListener { listener.onItemClick(item.uri) }
+        val entry = items[position]
+        // URI is always show.
+        holder.binding.uriText.text = entry.uri
+        // Main title is shown if one was found when record the entry.
+        holder.binding.titleText.text = entry.title ?: ""
+        // Last visited date is properly formatted.
+        val lastVisit = Date(entry.lastVisit)
+        val dateFormatter = DateFormat.getMediumDateFormat(holder.binding.root.context)
+        holder.binding.lastVisitText.text = dateFormatter.format(lastVisit)
+        // Bind the click action.
+        holder.binding.container.setOnClickListener { listener.onItemClick(entry.uri) }
     }
 
     override fun getItemCount(): Int = items.size

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

@@ -4,12 +4,16 @@ import android.security.keystore.KeyGenParameterSpec
 import android.security.keystore.KeyProperties
 import android.util.Log
 import androidx.room.*
-import java.lang.IllegalArgumentException
 import java.security.KeyPairGenerator
 import java.security.KeyStore
 import javax.security.auth.x500.X500Principal
 
 object Identities {
+    const val PROVIDER = "AndroidKeyStore"
+    private const val TAG = "Identities"
+
+    val keyStore by lazy { KeyStore.getInstance(PROVIDER).apply { load(null) } }
+
     @Entity
     data class Identity(
         /** ID. */
@@ -49,6 +53,10 @@ object Identities {
     suspend fun getAll(): List<Identity> =
         Database.INSTANCE.identityDao().getAll()
 
+    suspend fun getForUrl(url: String): Identity? =
+        Database.INSTANCE.identityDao().getAll()
+            .find { it.urls.any { usedUrl -> url.startsWith(usedUrl) } }
+
     suspend fun update(vararg identities: Identity) =
         Database.INSTANCE.identityDao().update(*identities)
 
@@ -62,7 +70,7 @@ object Identities {
 
     fun generateClientCert(alias: String, commonName: String) {
         val algo = KeyProperties.KEY_ALGORITHM_RSA
-        val kpg = KeyPairGenerator.getInstance(algo, "AndroidKeyStore")
+        val kpg = KeyPairGenerator.getInstance(algo, PROVIDER)
         val purposes = KeyProperties.PURPOSE_SIGN or KeyProperties.PURPOSE_VERIFY
         val spec = KeyGenParameterSpec.Builder(alias, purposes)
             .apply {
@@ -74,7 +82,9 @@ object Identities {
                     }
                 }
             }
-            .setDigests(KeyProperties.DIGEST_SHA256)
+            .setDigests(KeyProperties.DIGEST_NONE, KeyProperties.DIGEST_SHA256, KeyProperties.DIGEST_SHA512)
+            .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
+            .setSignaturePaddings(KeyProperties.SIGNATURE_PADDING_RSA_PKCS1)
             .build()
         kpg.initialize(spec)
         kpg.generateKeyPair()
@@ -82,7 +92,6 @@ object Identities {
     }
 
     private fun deleteClientCert(alias: String) {
-        val keyStore = KeyStore.getInstance("AndroidKeyStore").also { it.load(null) }
         if (keyStore.containsAlias(alias)) {
             keyStore.deleteEntry(alias)
             Log.i(TAG, "deleteClientCert: deleted entry with alias \"$alias\"")
@@ -90,6 +99,4 @@ object Identities {
             Log.i(TAG, "deleteClientCert: no such alias \"$alias\"")
         }
     }
-
-    private const val TAG = "Identities"
 }

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

@@ -1,6 +1,7 @@
 package dev.lowrespalmtree.comet
 
 import android.os.Bundle
+import android.util.Log
 import android.view.MenuItem
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.os.bundleOf
@@ -15,6 +16,7 @@ class MainActivity : AppCompatActivity() {
     private var nhf: NavHostFragment? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
+        Log.i(TAG, "onCreate")
         super.onCreate(savedInstanceState)
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
@@ -32,4 +34,8 @@ class MainActivity : AppCompatActivity() {
         nhf?.navController?.navigate(R.id.action_global_pageFragment, bundle)
         binding.drawerLayout.closeDrawers()
     }
+
+    companion object {
+        private const val TAG = "MainActivity"
+    }
 }

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

@@ -1,6 +1,7 @@
 package dev.lowrespalmtree.comet
 
 import android.annotation.SuppressLint
+import android.net.Uri
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
@@ -33,7 +34,7 @@ class PageAdapter(private val listener: Listener) :
         object Empty : ContentBlock()
         class Paragraph(val text: String) : ContentBlock()
         class Title(val text: String, val level: Int) : ContentBlock()
-        class Link(val url: String, val label: String) : ContentBlock()
+        class Link(val url: String, val label: String, val visited: Boolean) : ContentBlock()
         class Pre(val caption: String, var content: String, var closed: Boolean) : ContentBlock()
         class Blockquote(var text: String) : ContentBlock()
         class ListItem(val text: String) : ContentBlock()
@@ -54,7 +55,7 @@ class PageAdapter(private val listener: Listener) :
                 when (val line = lines[currentLine]) {
                     is EmptyLine -> blocks.add(ContentBlock.Empty)
                     is ParagraphLine -> blocks.add(ContentBlock.Paragraph(line.text))
-                    is LinkLine -> blocks.add(ContentBlock.Link(line.url, line.label))
+                    is LinkLine -> blocks.add(ContentBlock.Link(line.url, line.label, line.visited))
                     is ListItemLine -> blocks.add(ContentBlock.ListItem(line.text))
                     is TitleLine -> blocks.add(ContentBlock.Title(line.text, line.level))
                     is PreFenceLine -> {
@@ -95,8 +96,8 @@ class PageAdapter(private val listener: Listener) :
         lastBlockCount = blocks.size
     }
 
-    sealed class ContentViewHolder(view: View) : RecyclerView.ViewHolder(view) {
-        class Empty(binding: GemtextEmptyBinding) : ContentViewHolder(binding.root)
+    sealed class ContentViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
+        class Empty(val binding: GemtextEmptyBinding) : ContentViewHolder(binding.root)
         class Paragraph(val binding: GemtextParagraphBinding) : ContentViewHolder(binding.root)
         class Title1(val binding: GemtextTitle1Binding) : ContentViewHolder(binding.root)
         class Title2(val binding: GemtextTitle2Binding) : ContentViewHolder(binding.root)
@@ -153,9 +154,27 @@ 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(
+                    if (block.visited)
+                        resources.getColor(R.color.link_visited, null)
+                    else
+                        resources.getColor(R.color.link, null)
+                )
             }
             is ContentBlock.Pre ->
                 (holder as ContentViewHolder.Pre).binding.textView.text = block.content

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

@@ -16,7 +16,6 @@ import androidx.activity.addCallback
 import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
-import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import dev.lowrespalmtree.comet.databinding.FragmentPageViewBinding
 import dev.lowrespalmtree.comet.utils.isConnectedToNetwork
@@ -51,7 +50,7 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         binding.contentSwipeLayout.setOnRefreshListener { openUrl(vm.currentUrl) }
 
         vm.state.observe(viewLifecycleOwner) { updateState(it) }
-        vm.lines.observe(viewLifecycleOwner) { updateLines(it) }
+        vm.lines.observe(viewLifecycleOwner) { updateLines(it.second, it.first) }
         vm.event.observe(viewLifecycleOwner) { handleEvent(it) }
 
         activity?.onBackPressedDispatcher?.addCallback(viewLifecycleOwner) { onBackPressed() }
@@ -116,16 +115,7 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         }
 
         when (uri.scheme) {
-            "gemini" -> {
-                val prefs = PreferenceManager.getDefaultSharedPreferences(requireContext())
-                val protocol =
-                    prefs.getString("tls_version", Request.DEFAULT_TLS_VERSION)!!
-                val connectionTimeout =
-                    prefs.getInt("connection_timeout", Request.DEFAULT_CONNECTION_TIMEOUT_SEC)
-                val readTimeout =
-                    prefs.getInt("read_timeout", Request.DEFAULT_READ_TIMEOUT_SEC)
-                vm.sendGeminiRequest(uri, protocol, connectionTimeout, readTimeout)
-            }
+            "gemini" -> vm.sendGeminiRequest(uri, requireContext())
             else -> openUnknownScheme(uri)
         }
     }
@@ -151,8 +141,8 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         }
     }
 
-    private fun updateLines(lines: List<Line>) {
-        Log.d(TAG, "updateLines: ${lines.size} lines")
+    private fun updateLines(lines: List<Line>, url: String) {
+        Log.d(TAG, "updateLines: ${lines.size} lines from $url")
         adapter.setLines(lines)
     }
 
@@ -163,6 +153,7 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         when (event) {
             is PageViewModel.InputEvent -> {
                 askForInput(event.prompt, event.uri)
+                updateState(PageViewModel.State.IDLE)
             }
             is PageViewModel.SuccessEvent -> {
                 vm.currentUrl = event.uri
@@ -200,7 +191,7 @@ class PageFragment : Fragment(), PageAdapter.Listener {
                     val newUri = uri.buildUpon().query(text).build()
                     openUrl(newUri.toString(), base = vm.currentUrl)
                 },
-                onDismiss = { updateState(PageViewModel.State.IDLE) }
+                onDismiss = {}
             )
     }
 

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

@@ -1,11 +1,14 @@
 package dev.lowrespalmtree.comet
 
+import android.content.Context
 import android.net.Uri
 import android.util.Log
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.SavedStateHandle
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import androidx.preference.PreferenceManager
+import dev.lowrespalmtree.comet.utils.joinUrls
 import kotlinx.coroutines.*
 import kotlinx.coroutines.channels.onSuccess
 import java.net.ConnectException
@@ -17,18 +20,25 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
     ViewModel() {
     /** Currently viewed page URL. */
     var currentUrl: String = ""
+
     /** Latest Uri requested using `sendGeminiRequest`. */
     var loadingUrl: Uri? = null
+
     /** Observable page viewer state. */
     val state: MutableLiveData<State> by lazy { MutableLiveData<State>(State.IDLE) }
-    /** Observable page viewer lines (backed up by `linesList` but updated less often). */
-    val lines: MutableLiveData<List<Line>> by lazy { MutableLiveData<List<Line>>() }
+
+    /** Observable page viewer lines (backed up by `linesList` but updated less often). Left element is associated URL. */
+    val lines: MutableLiveData<Pair<String, List<Line>>> by lazy { MutableLiveData<Pair<String, List<Line>>>() }
+
     /** Observable page viewer latest event. */
     val event: MutableLiveData<Event> by lazy { MutableLiveData<Event>() }
+
     /** A non-saved list of visited URLs. Not an history, just used for going back. */
     val visitedUrls = mutableListOf<String>()
+
     /** Latest request job created, stored to cancel it if needed. */
     private var requestJob: Job? = null
+
     /** Lines for the current page. */
     private var linesList = ArrayList<Line>()
 
@@ -52,14 +62,36 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
      * The URI must be valid, absolute and with a gemini scheme.
      */
     @ExperimentalCoroutinesApi
-    fun sendGeminiRequest(uri: Uri, protocol: String, connectionTimeout: Int, readTimeout: Int, redirects: Int = 0) {
-        Log.d(TAG, "sendRequest: URI \"$uri\"")
+    fun sendGeminiRequest(
+        uri: Uri,
+        context: Context,
+        redirects: Int = 0
+    ) {
+        Log.i(TAG, "sendGeminiRequest: URI \"$uri\"")
         loadingUrl = uri
+
+        // Retrieve various request parameters from user preferences.
+        val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+        val protocol =
+            prefs.getString("tls_version", Request.DEFAULT_TLS_VERSION)!!
+        val connectionTimeout =
+            prefs.getInt("connection_timeout", Request.DEFAULT_CONNECTION_TIMEOUT_SEC)
+        val readTimeout =
+            prefs.getInt("read_timeout", Request.DEFAULT_READ_TIMEOUT_SEC)
+
         state.postValue(State.CONNECTING)
+
         requestJob?.apply { if (isActive) cancel() }
         requestJob = viewModelScope.launch(Dispatchers.IO) {
+            // Look for a suitable identity to use with this URL.
+            val keyManager = Identities.getForUrl(uri.toString())?.let {
+                Log.d(TAG, "sendGeminiRequest coroutine: using identity with key ${it.key}")
+                Request.KeyManager.fromAlias(it.key)
+            }
+
+            // Connect to the server and proceed (no TOFU validation yet).
             val response = try {
-                val request = Request(uri)
+                val request = Request(uri, keyManager = keyManager)
                 val socket = request.connect(protocol, connectionTimeout, readTimeout)
                 val channel = request.proceed(socket, this)
                 Response.from(channel, viewModelScope)
@@ -79,8 +111,10 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
                 )
                 return@launch
             }
+
             if (!isActive)
                 return@launch
+
             if (response == null) {
                 signalError("Can't parse server response.")
                 return@launch
@@ -113,9 +147,10 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
     @ExperimentalCoroutinesApi
     private suspend fun handleSuccessResponse(response: Response, uri: Uri) {
         state.postValue(State.RECEIVING)
+        val uriString = uri.toString()
 
         linesList.clear()
-        lines.postValue(linesList)
+        lines.postValue(Pair(uriString, linesList))
         val charset = Charset.defaultCharset()
         var mainTitle: String? = null
         var lastUpdate = System.currentTimeMillis()
@@ -126,7 +161,16 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
             while (!lineChannel.isClosedForReceive) {
                 val lineChannelResult = withTimeout(100) { lineChannel.tryReceive() }
                 lineChannelResult.onSuccess { line ->
+                    if (line is LinkLine) {
+                        // Mark visited links here as we have a access to the history.
+                        val fullUrl =
+                            if (Uri.parse(line.url).isAbsolute) line.url
+                            else joinUrls(uriString, line.url).toString()
+                        if (History.contains(fullUrl))
+                            line.visited = true
+                    }
                     linesList.add(line)
+                    // Get the first level 1 header as the page main title.
                     if (mainTitle == null && line is TitleLine && line.level == 1)
                         mainTitle = line.text
                 }
@@ -135,7 +179,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
                 if (linesList.size > lastNumLines) {
                     val time = System.currentTimeMillis()
                     if (time - lastUpdate >= 100) {
-                        lines.postValue(linesList)
+                        lines.postValue(Pair(uriString, linesList))
                         lastUpdate = time
                         lastNumLines = linesList.size
                     }
@@ -147,7 +191,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
             return
         }
         Log.d(TAG, "handleSuccessResponse: done parsing line data")
-        lines.postValue(linesList)
+        lines.postValue(Pair(uriString, linesList))
 
         // We record the history entry here: it's nice because we have the main title available
         // and we're already in a coroutine for database access.

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

@@ -8,20 +8,25 @@ import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.launch
 import java.io.BufferedInputStream
 import java.net.InetSocketAddress
+import java.net.Socket
 import java.net.SocketTimeoutException
+import java.security.KeyStore
+import java.security.Principal
+import java.security.PrivateKey
 import java.security.cert.X509Certificate
-import javax.net.ssl.SSLContext
-import javax.net.ssl.SSLProtocolException
-import javax.net.ssl.SSLSocket
-import javax.net.ssl.X509TrustManager
+import javax.net.ssl.*
 
-class Request(private val uri: Uri) {
+class Request(private val uri: Uri, private val keyManager: KeyManager? = null) {
     private val port get() = if (uri.port > 0) uri.port else 1965
 
     fun connect(protocol: String, connectionTimeout: Int, readTimeout: Int): SSLSocket {
-        Log.d(TAG, "connect: $protocol, c.to. $connectionTimeout, r.to. $readTimeout")
+        Log.d(
+            TAG,
+            "connect: $protocol, conn. timeout $connectionTimeout," +
+            " read timeout $readTimeout, key manager $keyManager"
+        )
         val context = SSLContext.getInstance(protocol)
-        context.init(null, arrayOf(TrustManager()), null)
+        context.init(arrayOf(keyManager), arrayOf(TrustManager()), null)
         val socket = context.socketFactory.createSocket() as SSLSocket
         socket.soTimeout = readTimeout * 1000
         socket.connect(InetSocketAddress(uri.host, port), connectionTimeout * 1000)
@@ -58,6 +63,49 @@ class Request(private val uri: Uri) {
         return channel
     }
 
+    class KeyManager(
+        private val alias: String,
+        private val cert: X509Certificate,
+        private val privateKey: PrivateKey
+    ) : X509ExtendedKeyManager() {
+        companion object {
+            fun fromAlias(alias: String): KeyManager? {
+                val cert = Identities.keyStore.getCertificate(alias) as X509Certificate?
+                    ?: return null.also { Log.e(TAG, "fromAlias: cert is null") }
+                val key = Identities.keyStore.getEntry(alias, null)?.let { entry ->
+                    (entry as KeyStore.PrivateKeyEntry).privateKey
+                } ?: return null.also { Log.e(TAG, "fromAlias: private key is null") }
+                return KeyManager(alias, cert, key)
+            }
+        }
+
+        override fun chooseClientAlias(
+            keyType: Array<out String>?,
+            issuers: Array<out Principal>?,
+            socket: Socket?
+        ): String = alias
+
+        override fun getCertificateChain(alias: String?): Array<out X509Certificate> = arrayOf(cert)
+
+        override fun getPrivateKey(alias: String?): PrivateKey = privateKey
+
+        override fun getServerAliases(
+            keyType: String?, issuers: Array<out Principal>?
+        ): Array<String> = throw UnsupportedOperationException()
+
+        override fun chooseServerAlias(
+            keyType: String?,
+            issuers: Array<out Principal>?,
+            socket: Socket?
+        ): String = throw UnsupportedOperationException()
+
+        override fun getClientAliases(
+            keyType: String?,
+            issuers: Array<out Principal>?
+        ): Array<String> = throw UnsupportedOperationException()
+    }
+
+    /** TODO An X509TrustManager implementation for TOFU validation. */
     @SuppressLint("CustomX509TrustManager")
     class TrustManager : X509TrustManager {
         @SuppressLint("TrustAllX509TrustManager")

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

@@ -18,16 +18,33 @@
         android:fontFamily="@font/preformatted"
         android:typeface="monospace" />
 
-    <TextView
-        android:id="@+id/titleText"
+    <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:textSize="16sp"
-        android:textColor="@color/text"
         android:layout_marginStart="8dp"
         android:layout_marginEnd="8dp"
         android:layout_marginTop="0dp"
-        android:layout_marginBottom="8dp"
-        android:textAppearance="?attr/textAppearanceListItem" />
+        android:layout_marginBottom="8dp">
+
+        <TextView
+            android:id="@+id/titleText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentStart="true"
+            android:layout_toStartOf="@id/lastVisitText"
+            android:textSize="16sp"
+            android:textColor="@color/text" />
+
+        <TextView
+            android:id="@+id/lastVisitText"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_alignBaseline="@id/titleText"
+            android:layout_alignParentEnd="true"
+            android:textSize="16sp"
+            android:textStyle="italic"
+            android:textColor="@color/text_light" />
+    </RelativeLayout>
 
 </LinearLayout>

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">
+
+    <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>

app/src/main/res/values-night/colors.xml

@@ -8,7 +8,6 @@
     <color name="main_accent_dark">#073642</color>
     <color name="second_accent">#2aa198</color>
     <color name="second_accent_dark">#073642</color>
-    <color name="link">#2aa198</color>
     <color name="url_bar">#fdf6e3</color>
     <color name="url_bar_loading">#586e75</color>
 </resources>

app/src/main/res/values/colors.xml

@@ -11,6 +11,7 @@
     <color name="second_accent">#6c71c4</color>
     <color name="second_accent_dark">#073642</color>
     <color name="link">#268bd2</color>
+    <color name="link_visited">#2aa198</color>
     <color name="url_bar">#002b36</color>
     <color name="url_bar_loading">#fdf6e3</color>
     <!--