Implement functionality to make emoji-only messages larger

app/src/main/java/de/kuschku/quasseldroid/ui/chat/messages/MessageListFragment.kt

@@ -57,6 +57,7 @@ import de.kuschku.quasseldroid.settings.AutoCompleteSettings
 import de.kuschku.quasseldroid.settings.BacklogSettings
 import de.kuschku.quasseldroid.settings.MessageSettings
 import de.kuschku.quasseldroid.ui.chat.ChatActivity
+import de.kuschku.quasseldroid.util.Patterns
 import de.kuschku.quasseldroid.util.avatars.AvatarHelper
 import de.kuschku.quasseldroid.util.helper.*
 import de.kuschku.quasseldroid.util.service.ServiceBoundFragment
@@ -292,7 +293,8 @@ class MessageListFragment : ServiceBoundFragment() {
           isSelected = selected.contains(it.messageId),
           isExpanded = expanded.contains(it.messageId),
           isMarkerLine = markerLine == it.messageId,
-          isEmoji = false
+          // Do not run the emoji regex if not necessary, this saves quite a bit of performance
+          isEmoji = messageSettings.largerEmoji && Patterns.EMOJI.matches(it.content)
         )
       }
     }

app/src/main/java/de/kuschku/quasseldroid/util/Patterns.kt

@@ -19,6 +19,7 @@
 
 package de.kuschku.quasseldroid.util
 
+import de.kuschku.quasseldroid.util.emoji.EmojiData
 import org.intellij.lang.annotations.Language
 
 @SuppressWarnings("Access")
@@ -117,4 +118,14 @@ object Patterns {
   @Language("RegExp")
   const val IRC_NICK_STR = """[A-Za-z\x5b-\x60\x7b-\x7d][A-Za-z0-9\x5b-\x60\x7b-\x7d]*"""
   val IRC_NICK = Regex(IRC_NICK_STR)
+
+  /**
+   * Regular expression to detect emoji
+   */
+  val EMOJI_STRING = EmojiData.emojis.joinToString(
+    prefix = """(?:\s|\Q""",
+    separator = """\E|\Q""",
+    postfix = """\E)+"""
+  )
+  val EMOJI = Regex(EMOJI_STRING)
 }

app/src/main/res/xml/preferences.xml

@@ -207,14 +207,12 @@
       android:key="@string/preference_time_at_end_key"
       android:summary="@string/preference_time_at_end_summary"
       android:title="@string/preference_time_at_end_title" />
-    <!--
     <SwitchPreference
       android:defaultValue="false"
       android:dependency="@string/preference_nicks_on_new_line_key"
       android:key="@string/preference_larger_emoji_key"
-      android:title="@string/preference_larger_emoji_title"
-      android:summary="@string/preference_larger_emoji_summary" />
-    -->
+      android:summary="@string/preference_larger_emoji_summary"
+      android:title="@string/preference_larger_emoji_title" />
   </PreferenceCategory>
 
   <PreferenceCategory android:layout="@layout/widget_preference_divider" />