Add pref for whether to display full user names and tooltips

src/components/mention_link/mention_link.js

@@ -50,6 +50,10 @@ const MentionLink = {
     userName () {
       return this.user && this.userNameFullUi.split('@')[0]
     },
+    serverName () {
+      // XXX assumed that domain does not contain @
+      return this.user && (this.userNameFullUi.split('@')[1] || this.$store.getters.instanceDomain)
+    },
     userNameFull () {
       return this.user && this.user.screen_name
     },
@@ -88,6 +92,22 @@ const MentionLink = {
     useAtIcon () {
       return this.mergedConfig.useAtIcon
     },
+    isRemote () {
+      return this.userName !== this.userNameFull
+    },
+    shouldShowFullUserName () {
+      const conf = this.mergedConfig.mentionLinkDisplay
+      if (conf === 'short') {
+        return false
+      } else if (conf === 'full') {
+        return true
+      } else { // full_for_remote
+        return this.isRemote
+      }
+    },
+    shouldShowTooltip () {
+      return this.mergedConfig.mentionLinkShowTooltip && this.mergedConfig.mentionLinkDisplay === 'short' && this.isRemote
+    },
     ...mapGetters(['mergedConfig']),
     ...mapState({
       currentUser: state => state.users.currentUser

src/components/mention_link/mention_link.vue

@@ -28,10 +28,16 @@
           size="sm"
           icon="at"
           class="at"
-        /><span class="shortName">{{ !useAtIcon ? '@' : '' }}<span
-            class="userName"
-            v-html="userName"
-          /></span>
+        /><span
+          class="shortName"
+        >{{ !useAtIcon ? '@' : '' }}<span
+          class="userName"
+          v-html="userName"
+        /><span
+          v-if="shouldShowFullUserName"
+          class="serverName"
+          v-html="'@' + serverName"
+        /></span>
         <span
           v-if="isYou"
           class="you"
@@ -39,7 +45,7 @@
         <!-- eslint-enable vue/no-v-html -->
       </a>
       <span
-        v-if="userName !== userNameFull"
+        v-if="shouldShowTooltip"
         class="full popover-default"
         :class="[highlightType]"
       >