Add autocompletion for custom emoji (#1089)

* Remove unnecessary //noinspection ConstantConditions

* Add autocompletion for custom emoji

* Update MentionTagTokenizer tests for emoji autocomplete support

* Move 1) emoji list retrieval notifying and 2) setting of emojiList field into setEmojiList() method of ComposeActivity

* Convert RelativeLayout in item_autocomplete_emoji.xml to LinearLayout

* Rename MentionTag* to Compose*

* Improve emoji autocomplete matching

* Make hashtag autocomplete results bold

* Use Context.getString()'s built-in formatting

* Add a divider between emoji autocomplete results that *start with* the token and those that *contain* it

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

@@ -38,6 +38,7 @@
     <attr name="card_background" format="reference|color" />
     <attr name="card_image_background" format="reference|color" />
     <attr name="compound_button_color" format="reference" />
+    <attr name="autocomplete_divider_drawable" format="reference" />
 
     <attr name="play_indicator_drawable" format="reference" />
     <attr name="status_text_small" format="dimension" />

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

@@ -28,6 +28,7 @@
     <color name="compose_media_button_disabled_dark">#586173</color>
     <color name="custom_tab_toolbar_dark">#313543</color>
     <color name="compose_reply_content_background_dark">#373c4b</color>
+    <color name="autocomplete_divider_dark">#424a5b</color>
     <!--Black Theme Colors-->
     <color name="color_primary_black">#000000</color>
     <color name="color_primary_dark_black">#111111</color> <!--Dark Dark-->

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

@@ -355,6 +355,7 @@
     <string name="caption_systememoji">Your device\'s default emoji set</string>
     <string name="caption_blobmoji">The Blob emojis known from Android 4.4–7.1</string>
     <string name="caption_twemoji">Mastodon\'s standard emoji set</string>
+    <string name="emoji_shortcode_format" translatable="false">:%s:</string>
 
     <string name="download_failed">Download failed</string>
 

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

@@ -120,6 +120,8 @@
 
         <item name="compound_button_color">@color/compound_button_color_light</item>
 
+        <item name="autocomplete_divider_drawable">@drawable/autocomplete_divider_light</item>
+
         <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>
 
         <item name="minTouchTargetSize">32dp</item> <!-- this affects RadioButton size -->