Optimize thread display

src/_variables.scss

@@ -30,3 +30,5 @@ $fallback--attachmentRadius: 10px;
 $fallback--chatMessageRadius: 10px;
 
 $fallback--buttonShadow: 0px 0px 2px 0px rgba(0, 0, 0, 1), 0px 1px 0px 0px rgba(255, 255, 255, 0.2) inset, 0px -1px 0px 0px rgba(0, 0, 0, 0.2) inset;
+
+$status-margin: 0.75em;

src/components/conversation/conversation.vue

@@ -18,6 +18,7 @@
         {{ $t('timeline.collapse') }}
       </button>
     </div>
+    <div class="conversation-body panel-body">
       <div
         v-if="diveMode"
         class="conversation-undive-box"
@@ -44,7 +45,10 @@
           <FAIcon icon="chevron-left" />
         </i18n>
       </div>
-    <div v-if="isTreeView">
+      <div
+        v-if="isTreeView"
+        class="thread-body"
+      >
         <thread-tree
           v-for="status in showingTopLevel"
           :key="status.id"
@@ -77,7 +81,10 @@
           :dive="canDive ? diveIntoStatus : undefined"
         />
       </div>
-    <div v-if="isLinearView">
+      <div
+        v-if="isLinearView"
+        class="thread-body"
+      >
         <status
           v-for="status in conversation"
           :key="status.id"
@@ -108,6 +115,7 @@
         />
       </div>
     </div>
+  </div>
   <div
     v-else
     :style="hiddenStyle"
@@ -121,21 +129,54 @@
 
 .Conversation {
   .conversation-undive-box {
-    padding: 1em;
+    padding: $status-margin;
   }
+
+  /* HACK: we want the border width to scale with the status *below it* */
   .conversation-undive-box,
   .conversation-status {
-    border-bottom-width: 1px;
+    border-top-width: 1px;
-    border-bottom-style: solid;
+    border-top-style: solid;
-    border-bottom-color: var(--border, $fallback--border);
+    border-top-color: var(--border, $fallback--border);
     border-radius: 0;
   }
 
+  &.-expanded .conversation-body .thread-tree:nth-child(1) > .conversation-status {
+    border-top-left-radius: $fallback--panelRadius;
+    border-top-left-radius: var(--panelRadius, $fallback--panelRadius);
+  }
+
+  /* first element in conversation body */
+  &.-expanded .conversation-body {
+    .conversation-undive-box:nth-child(1),
+    & > .conversation-status:nth-child(1),
+    & > .thread-body:nth-child(1) > .thread-tree:nth-child(1) > .conversation-status:nth-child(1), {
+      border-top: none;
+    }
+  }
+
+  /* first unexpanded statuses in timeline */
+  &:first-child:not(.-expanded) {
+    .conversation-body {
+      .conversation-status {
+        border-top: none;
+      }
+    }
+  }
+
+  /* expanded conversation in timeline */
+  &.status-fadein.-expanded .thread-body {
+    border-left-width: 4px;
+    border-left-style: solid;
+    border-left-color: $fallback--cRed;
+    border-left-color: var(--cRed, $fallback--cRed);
+    border-radius: 0 0 $fallback--panelRadius $fallback--panelRadius;
+    border-radius: 0 0 var(--panelRadius, $fallback--panelRadius) var(--panelRadius, $fallback--panelRadius);
+    border-bottom: 1px solid var(--border, $fallback--border);
+  }
   &.-expanded {
     .conversation-status:last-child {
       border-bottom: none;
-      border-radius: 0 0 $fallback--panelRadius $fallback--panelRadius;
-      border-radius: 0 0 var(--panelRadius, $fallback--panelRadius) var(--panelRadius, $fallback--panelRadius);
     }
   }
 }

src/components/status/status.scss

@@ -1,7 +1,5 @@
 @import '../../_variables.scss';
 
-$status-margin: 0.75em;
-
 .Status {
   min-width: 0;
   white-space: normal;
@@ -28,13 +26,6 @@ $status-margin: 0.75em;
     --icon: var(--selectedPostIcon, $fallback--icon);
   }
 
-  &.-conversation {
-    border-left-width: 4px;
-    border-left-style: solid;
-    border-left-color: $fallback--cRed;
-    border-left-color: var(--cRed, $fallback--cRed);
-  }
-
   .gravestone {
     padding: $status-margin;
     color: $fallback--faint;

src/components/thread_tree/thread_tree.vue

@@ -109,14 +109,16 @@
 <style lang="scss">
 @import '../../_variables.scss';
 .thread-tree-replies {
-  margin-left: 1em;
+  margin-left: $status-margin;
+  border-left: 1px solid var(--border, $fallback--border);
+  border-top-left-radius: $fallback--panelRadius;
+  border-top-left-radius: var(--panelRadius, $fallback--panelRadius);
+  border-bottom-left-radius: $fallback--panelRadius;
+  border-bottom-left-radius: var(--panelRadius, $fallback--panelRadius);
 }
+
 .thread-tree-replies-hidden {
-  padding: 1em;
+  padding: $status-margin;
-  border-bottom: 1px solid var(--border, #222);
+  border-top: 1px solid var(--border, $fallback--border);
-}
-.conversation-status.conversation-status-treeview:last-child,
-.Conversation.-expanded .conversation-status.conversation-status-treeview:last-child {
-  border-bottom: 1px solid var(--border, #222);
 }
 </style>