Merge branch '_acet-discussion-redesign' into 'master'

Discussions redesign

Closes #29294

See merge request gitlab-org/gitlab-ce!22333

app/assets/javascripts/diffs/components/diff_discussions.vue

@@ -76,7 +76,6 @@ export default {
         <noteable-discussion
           v-show="isExpanded(discussion)"
           :discussion="discussion"
-          :render-header="false"
           :render-diff-file="false"
           :always-expanded="true"
           :discussions-by-diff-order="true"

app/assets/javascripts/diffs/components/parallel_diff_comment_row.vue

@@ -76,8 +76,9 @@ export default {
     :class="className"
     class="notes_holder"
   >
-    <td class="notes_line old"></td>
-    <td class="notes_content parallel old">
+    <td
+      class="notes_content parallel old"
+      colspan="2">
       <div
         v-if="shouldRenderDiscussionsOnLeft"
         class="content"
@@ -95,8 +96,9 @@ export default {
         line-position="left"
       />
     </td>
-    <td class="notes_line new"></td>
-    <td class="notes_content parallel new">
+    <td
+      class="notes_content parallel new"
+      colspan="2">
       <div
         v-if="shouldRenderDiscussionsOnRight"
         class="content"

app/assets/javascripts/notes/components/comment_form.vue

@@ -321,10 +321,10 @@ Please check your network connection and try again.`;
       v-else-if="!canCreateNote"
       :issuable-type="issuableTypeTitle"
     />
-    <ul
+    <div
       v-else-if="canCreateNote"
       class="notes notes-form timeline">
-      <li class="timeline-entry">
+      <div class="timeline-entry note-form">
         <div class="timeline-entry-inner">
           <div class="flash-container error-alert timeline-content"></div>
           <div class="timeline-icon d-none d-sm-none d-md-block">
@@ -462,7 +462,7 @@ append-right-10 comment-type-dropdown js-comment-type-dropdown droplab-dropdown"
             </form>
           </div>
         </div>
-      </li>
-    </ul>
+      </div>
+    </div>
   </div>
 </template>

app/assets/javascripts/notes/components/discussion_counter.vue

 <script>
 import { mapActions, mapGetters } from 'vuex';
-import resolveSvg from 'icons/_icon_resolve_discussion.svg';
-import resolvedSvg from 'icons/_icon_status_success_solid.svg';
-import mrIssueSvg from 'icons/_icon_mr_issue.svg';
-import nextDiscussionSvg from 'icons/_next_discussion.svg';
+import Icon from '~/vue_shared/components/icon.vue';
 import { pluralize } from '../../lib/utils/text_utility';
 import discussionNavigation from '../mixins/discussion_navigation';
 import tooltip from '../../vue_shared/directives/tooltip';
@@ -12,6 +9,9 @@ export default {
   directives: {
     tooltip,
   },
+  components: {
+    Icon,
+  },
   mixins: [discussionNavigation],
   computed: {
     ...mapGetters([
@@ -37,12 +37,6 @@ export default {
       return this.getNoteableData.create_issue_to_resolve_discussions_path;
     },
   },
-  created() {
-    this.resolveSvg = resolveSvg;
-    this.resolvedSvg = resolvedSvg;
-    this.mrIssueSvg = mrIssueSvg;
-    this.nextDiscussionSvg = nextDiscussionSvg;
-  },
   methods: {
     ...mapActions(['expandDiscussion']),
     jumpToFirstUnresolvedDiscussion() {
@@ -66,15 +60,9 @@ export default {
         <span
           :class="{ 'is-active': allResolved }"
           class="line-resolve-btn is-disabled"
-          type="button">
-          <span
-            v-if="allResolved"
-            v-html="resolvedSvg"
-          ></span>
-          <span
-            v-else
-            v-html="resolveSvg"
-          ></span>
+          type="button"
+        >
+          <icon name="check-circle" />
         </span>
         <span class="line-resolve-text">
           {{ resolvedDiscussionCount }}/{{ discussionCount }} {{ countText }} resolved
@@ -90,7 +78,7 @@ export default {
           :title="s__('Resolve all discussions in new issue')"
           data-container="body"
           class="new-issue-for-discussion btn btn-default discussion-create-issue-btn">
-          <span v-html="mrIssueSvg"></span>
+          <icon name="issue-new" />
         </a>
       </div>
       <div
@@ -103,7 +91,7 @@ export default {
           data-container="body"
           class="btn btn-default discussion-next-btn"
           @click="jumpToFirstUnresolvedDiscussion">
-          <span v-html="nextDiscussionSvg"></span>
+          <icon name="comment-next" />
         </button>
       </div>
     </div>

app/assets/javascripts/notes/components/note_actions.vue

 <script>
 import { mapGetters } from 'vuex';
-import emojiSmiling from 'icons/_emoji_slightly_smiling_face.svg';
-import emojiSmile from 'icons/_emoji_smile.svg';
-import emojiSmiley from 'icons/_emoji_smiley.svg';
-import editSvg from 'icons/_icon_pencil.svg';
-import resolveDiscussionSvg from 'icons/_icon_resolve_discussion.svg';
-import resolvedDiscussionSvg from 'icons/_icon_status_success_solid.svg';
-import ellipsisSvg from 'icons/_ellipsis_v.svg';
 import Icon from '~/vue_shared/components/icon.vue';
 import tooltip from '~/vue_shared/directives/tooltip';
 import { GlLoadingIcon } from '@gitlab-org/gitlab-ui';
@@ -110,15 +103,6 @@ export default {
       return title;
     },
   },
-  created() {
-    this.emojiSmiling = emojiSmiling;
-    this.emojiSmile = emojiSmile;
-    this.emojiSmiley = emojiSmiley;
-    this.editSvg = editSvg;
-    this.ellipsisSvg = ellipsisSvg;
-    this.resolveDiscussionSvg = resolveDiscussionSvg;
-    this.resolvedDiscussionSvg = resolvedDiscussionSvg;
-  },
   methods: {
     onEdit() {
       this.$emit('handleEdit');
@@ -152,12 +136,7 @@ export default {
         class="line-resolve-btn note-action-button"
         @click="onResolve">
         <template v-if="!isResolving">
-          <div
-            v-if="isResolved"
-            v-html="resolvedDiscussionSvg"></div>
-          <div
-            v-else
-            v-html="resolveDiscussionSvg"></div>
+          <icon name="check-circle" />
         </template>
         <gl-loading-icon
           v-else
@@ -179,18 +158,18 @@ export default {
         title="Add reaction"
       >
         <gl-loading-icon inline/>
-        <span
-          class="link-highlight award-control-icon-neutral"
-          v-html="emojiSmiling">
-        </span>
-        <span
-          class="link-highlight award-control-icon-positive"
-          v-html="emojiSmiley">
-        </span>
-        <span
-          class="link-highlight award-control-icon-super-positive"
-          v-html="emojiSmile">
-        </span>
+        <icon
+          css-classes="link-highlight award-control-icon-neutral"
+          name="emoji_slightly_smiling_face"
+        />
+        <icon
+          css-classes="link-highlight award-control-icon-positive"
+          name="emoji_smiley"
+        />
+        <icon
+          css-classes="link-highlight award-control-icon-super-positive"
+          name="emoji_smiley"
+        />
       </a>
     </div>
     <div
@@ -204,10 +183,10 @@ export default {
         data-container="body"
         data-placement="bottom"
         @click="onEdit">
-        <span
-          class="link-highlight"
-          v-html="editSvg">
-        </span>
+        <icon
+          name="pencil"
+          css-classes="link-highlight"
+        />
       </button>
     </div>
     <div
@@ -240,10 +219,10 @@ export default {
         data-toggle="dropdown"
         data-container="body"
         data-placement="bottom">
-        <span
-          class="icon"
-          v-html="ellipsisSvg">
-        </span>
+        <icon
+          css-classes="icon"
+          name="ellipsis_v"
+        />
       </button>
       <ul class="dropdown-menu more-actions-dropdown dropdown-open-left">
         <li v-if="canReportAsAbuse">

app/assets/javascripts/notes/components/note_awards_list.vue

 <script>
 import { mapActions, mapGetters } from 'vuex';
-import emojiSmiling from 'icons/_emoji_slightly_smiling_face.svg';
-import emojiSmile from 'icons/_emoji_smile.svg';
-import emojiSmiley from 'icons/_emoji_smiley.svg';
+import Icon from '~/vue_shared/components/icon.vue';
 import Flash from '../../flash';
 import { glEmojiTag } from '../../emoji';
 import tooltip from '../../vue_shared/directives/tooltip';
 
 export default {
+  components: {
+    Icon,
+  },
   directives: {
     tooltip,
   },
@@ -72,11 +73,6 @@ export default {
       return this.noteAuthorId === this.getUserData.id;
     },
   },
-  created() {
-    this.emojiSmiling = emojiSmiling;
-    this.emojiSmile = emojiSmile;
-    this.emojiSmiley = emojiSmiley;
-  },
   methods: {
     ...mapActions(['toggleAwardRequest']),
     getAwardHTML(name) {
@@ -196,17 +192,14 @@ export default {
           data-boundary="viewport"
           data-placement="bottom"
           type="button">
-          <span
-            class="award-control-icon award-control-icon-neutral"
-            v-html="emojiSmiling">
+          <span class="award-control-icon award-control-icon-neutral">
+            <icon name="emoji_slightly_smiling_face" />
           </span>
-          <span
-            class="award-control-icon award-control-icon-positive"
-            v-html="emojiSmiley">
+          <span class="award-control-icon award-control-icon-positive">
+            <icon name="emoji_smiley" />
           </span>
-          <span
-            class="award-control-icon award-control-icon-super-positive"
-            v-html="emojiSmile">
+          <span class="award-control-icon award-control-icon-super-positive">
+            <icon name="emoji_smiley" />
           </span>
           <i
             aria-hidden="true"

app/assets/javascripts/notes/components/note_header.vue

@@ -45,6 +45,9 @@ export default {
     noteTimestampLink() {
       return `#note_${this.noteId}`;
     },
+    hasAuthor() {
+      return this.author && Object.keys(this.author).length;
+    },
   },
   methods: {
     ...mapActions(['setTargetNoteHash']),
@@ -76,7 +79,7 @@ export default {
       </button>
     </div>
     <a
-      v-if="Object.keys(author).length"
+      v-if="hasAuthor"
       :href="author.path"
     >
       <span class="note-header-author-name">{{ author.name }}</span>
@@ -92,9 +95,6 @@ export default {
     </span>
     <span class="note-headline-light">
       <span class="note-headline-meta">
-        <template v-if="actionText">
-          {{ actionText }}
-        </template>
         <span class="system-note-message">
           <slot></slot>
         </span>
@@ -102,7 +102,9 @@ export default {
           v-if="createdAt"
         >
           <span class="system-note-separator">
-            &middot;
+            <template v-if="actionText">
+              {{ actionText }}
+            </template>
           </span>
           <a
             :href="noteTimestampLink"

app/assets/javascripts/notes/components/noteable_note.vue

@@ -173,7 +173,7 @@ export default {
     :class="classNameBindings"
     :data-award-url="note.toggle_award_path"
     :data-note-id="note.id"
-    class="note timeline-entry"
+    class="note timeline-entry note-wrapper"
   >
     <div class="timeline-entry-inner">
       <div class="timeline-icon">
@@ -196,6 +196,7 @@ export default {
             :author="author"
             :created-at="note.created_at"
             :note-id="note.id"
+            action-text="commented"
           />
           <note-actions
             :author-id="author.id"

app/assets/javascripts/notes/components/toggle_replies_widget.vue

+<script>
+import _ from 'underscore';
+import Icon from '~/vue_shared/components/icon.vue';
+import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';
+import TimeAgoTooltip from '~/vue_shared/components/time_ago_tooltip.vue';
+
+export default {
+  components: {
+    Icon,
+    UserAvatarLink,
+    TimeAgoTooltip,
+  },
+  props: {
+    collapsed: {
+      type: Boolean,
+      required: true,
+    },
+    replies: {
+      type: Array,
+      required: true,
+    },
+  },
+  computed: {
+    lastReply() {
+      return this.replies[this.replies.length - 1];
+    },
+    uniqueAuthors() {
+      const authors = this.replies.map(reply => reply.author || {});
+
+      return _.uniq(authors, author => author.username);
+    },
+    className() {
+      return this.collapsed ? 'collapsed' : 'expanded';
+    },
+  },
+  methods: {
+    toggle() {
+      this.$emit('toggle');
+    },
+  },
+};
+</script>
+
+<template>
+  <li
+    :class="className"
+    class="replies-toggle"
+  >
+    <template v-if="collapsed">
+      <icon
+        name="chevron-right"
+        @click.native="toggle"
+      />
+      <div>
+        <user-avatar-link
+          v-for="author in uniqueAuthors"
+          :key="author.username"
+          :link-href="author.path"
+          :img-alt="author.name"
+          :img-src="author.avatar_url"
+          :img-size="26"
+          :tooltip-text="author.name"
+          tooltip-placement="bottom"
+        />
+      </div>
+      <button
+        class="btn btn-link js-replies-text"
+        type="button"
+        @click="toggle"
+      >
+        {{ replies.length }} {{ n__('reply', 'replies', replies.length) }}
+      </button>
+      {{ __('Last reply by') }}
+      <a
+        :href="lastReply.author.path"
+        class="btn btn-link author-link"
+      >
+        {{ lastReply.author.name }}
+      </a>
+      <time-ago-tooltip
+        :time="lastReply.created_at"
+        tooltip-placement="bottom"
+      />
+    </template>
+    <span
+      v-else
+      class="collapse-replies-btn js-collapse-replies"
+      @click="toggle"
+    >
+      <icon name="chevron-down" />
+      {{ s__('Notes|Collapse replies') }}
+    </span>
+  </li>
+</template>

app/assets/javascripts/vue_shared/components/notes/skeleton_note.vue

@@ -10,7 +10,7 @@ export default {
 </script>
 
 <template>
-  <li class="timeline-entry note">
+  <li class="timeline-entry note note-wrapper">
     <div class="timeline-entry-inner">
       <div class="timeline-icon">
       </div>

app/assets/javascripts/vue_shared/components/notes/system_note.vue

@@ -76,7 +76,7 @@ export default {
   <li
     :id="noteAnchorId"
     :class="{ target: isTargetNote }"
-    class="note system-note timeline-entry">
+    class="note system-note timeline-entry note-wrapper">
     <div class="timeline-entry-inner">
       <div
         class="timeline-icon"

app/assets/stylesheets/framework/awards.scss

@@ -148,10 +148,7 @@
 
     .award-control-icon svg {
       background: $award-emoji-positive-add-bg;
-
-      path {
-        fill: $award-emoji-positive-add-lines;
-      }
+      fill: $award-emoji-positive-add-lines;
     }
 
     .award-control-icon-neutral {

app/assets/stylesheets/framework/buttons.scss

@@ -222,6 +222,25 @@
     }
   }
 
+  &.btn-text-field {
+    width: 100%;
+    text-align: left;
+    padding: 6px 16px;
+    border-color: $border-color;
+    color: $gray-darkest;
+    background-color: $gray-light;
+
+    &:hover,
+    &:active,
+    &:focus {
+      cursor: text;
+      box-shadow: none;
+      border-color: lighten($blue-300, 20%);
+      color: $gray-darkest;
+      background-color: $gray-light;
+    }
+  }
+
   &.dot-highlight::after {
     content: '';
     background-color: $blue-500;
@@ -339,25 +358,6 @@
   }
 }
 
-.btn-text-field {
-  width: 100%;
-  text-align: left;
-  padding: 6px 16px;
-  border-color: $border-color;
-  color: $gray-darkest;
-  background-color: $gray-light;
-
-  &:hover,
-  &:active,
-  &:focus {
-    cursor: text;
-    box-shadow: none;
-    border-color: lighten($blue-300, 20%);
-    color: $gray-darkest;
-    background-color: $gray-light;
-  }
-}
-
 .btn-build {
   margin-left: 10px;
 

app/assets/stylesheets/framework/files.scss

@@ -36,7 +36,6 @@
     text-align: left;
     padding: 10px $gl-padding;
     word-wrap: break-word;
-    border-radius: $border-radius-default $border-radius-default 0 0;
 
     &.file-title-clear {
       padding-left: 0;

app/assets/stylesheets/framework/timeline.scss

 .timeline {
-  @include basic-list;
   margin: 0;
   padding: 0;
+  list-style: none;
 
   &::before {
     @include notes-media('max', map-get($grid-breakpoints, sm)) {
@@ -26,10 +26,8 @@
 }
 
 .timeline-entry {
-  border-color: $white-normal;
   color: $gl-text-color;
-  border-bottom: 1px solid $border-white-light;
-  background: $white-light;
+  background-color: $white-light;
 
   .timeline-entry-inner {
     position: relative;

app/assets/stylesheets/pages/diff.scss

@@ -59,6 +59,7 @@
       margin: 0;
       padding: 0;
       table-layout: fixed;
+      border-radius: 0 0 $border-radius-default $border-radius-default;
 
       .diff-line-num {
         width: 50px;
@@ -859,7 +860,7 @@
 }
 
 .diff-file .note-container > .new-note,
-.note-container .discussion-notes {
+.note-container .discussion-notes.diff-discussions {
   margin-left: 100px;
   border-left: 1px solid $white-normal;
 }

app/assets/stylesheets/pages/note_form.scss

@@ -239,6 +239,7 @@
   .discussion-reply-holder {
     background-color: $white-light;
     padding: 10px 16px;
+    border-radius: 0 0 $border-radius-default $border-radius-default;
 
     &.is-replying {
       padding-bottom: $gl-padding;
@@ -247,10 +248,15 @@
 }
 
 .discussion-with-resolve-btn {
+  @include media-breakpoint-up(sm) {
+    display: flex;
+  }
+
+
   .discussion-actions {
     display: table;
 
-    .btn-default path {
+    svg {
       fill: $gray-darkest;
     }
 
@@ -270,6 +276,12 @@
   .btn {
     width: 100%;
   }
+
+  .btn-text-field {
+    @include media-breakpoint-down(xs) {
+      margin-bottom: $gl-padding-8;
+    }
+  }
 }
 
 .discussion-notes-count {

app/assets/stylesheets/pages/notes.scss

-/**
- * Notes
- */
+$system-note-icon-size: 32px;
+$system-note-svg-size: 16px;
+$note-form-margin-left: 70px;
 
-@-webkit-keyframes targe3-note {
-  from {
-    background: $note-targe3-outside;
+@mixin vertical-line($left) {
+  &::before {
+    content: '';
+    border-left: 2px solid $theme-gray-100;
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: $left;
   }
+}
 
-  50% {
-    background: $note-targe3-inside;
-  }
+.note-wrapper {
+  padding: $gl-padding;
+}
+
+.issuable-discussion {
+  .notes.timeline > .timeline-entry {
+    border: 1px solid $border-color;
+    border-radius: $border-radius-default;
+    margin: $gl-padding 0;
+
+    &.system-note,
+    &.note-form {
+      border: 0;
+    }
+
+    &.note-form {
+      margin-left: 0;
 
-  to {
-    background: $note-targe3-outside;
+      @include notes-media('min', map-get($grid-breakpoints, md)) {
+        margin-left: $note-form-margin-left;
+      }
+
+      .timeline-icon {
+        @include notes-media('min', map-get($grid-breakpoints, sm)) {
+          margin-left: -$note-icon-gutter-width;
+        }
+      }
+
+      .timeline-content {
+        margin-left: 0;
+      }
+    }
+
+    .notes_content {
+      border: 0;
+      border-top: 1px solid $border-color;
+    }
   }
 }
 
-ul.notes {
+.main-notes-list {
+  @include vertical-line(39px);
+}
+
+.notes {
   display: block;
   list-style: none;
   margin: 0;
   padding: 0;
+  position: relative;
+
+  > .note-discussion {
+    .card {
+      border: 0;
+    }
+
+    li.note {
+      border-bottom: 1px solid $border-color;
+
+      &:first-child {
+        border-radius: $border-radius-default $border-radius-default 0 0;
+      }
+    }
+  }
+
+  .replies-toggle {
+    background-color: $gray-light;
+    padding: $gl-padding-8 $gl-padding;
+
+    .collapse-replies-btn:hover {
+      color: $blue-600;
+    }
+
+    &.expanded {
+      border-bottom: 1px solid $border-color;
+
+      span {
+        cursor: pointer;
+      }
+
+      svg {
+        position: relative;
+        top: 3px;
+      }
+    }
+
+    &.collapsed {
+      color: $gl-text-color-secondary;
+
+      svg {
+        float: left;
+        position: relative;
+        top: $gl-padding-4;
+        margin-right: $gl-padding-8;
+        cursor: pointer;
+      }
+
+      img {
+        margin: -2px 4px 0 0;
+      }
+
+      .author-link {
+        color: $gl-text-color;
+      }
+    }
+
+    .user-avatar-link {
+      &:last-child img {
+        margin-right: $gl-padding-8;
+      }
+    }
+
+    .btn-link {
+      border: 0;
+      vertical-align: baseline;
+    }
+  }
 
   .note-created-ago,
   .note-updated-at {
@@ -28,8 +137,6 @@ ul.notes {
   }
 
   .discussion-body {
-    padding-top: 8px;
-
     .card {
       margin-bottom: 0;
     }
@@ -46,21 +153,10 @@ ul.notes {
   }
 
   > li {
-    // .timeline-entry
-    padding: 0;
     display: block;
     position: relative;
     border-bottom: 0;
 
-    @include notes-media('min', map-get($grid-breakpoints, sm)) {
-      padding-left: $note-icon-gutter-width;
-    }
-
-    .timeline-entry-inner {
-      padding: $gl-padding $gl-btn-padding;
-      border-bottom: 1px solid $white-normal;
-    }
-
     &:target,
     &.target {
       border-bottom: 1px solid $white-normal;
@@ -75,23 +171,10 @@ ul.notes {
       }
     }
 
-    .timeline-icon {
-      @include notes-media('min', map-get($grid-breakpoints, sm)) {
-        margin-left: -$note-icon-gutter-width;
-      }
-    }
-
-    .timeline-content {
-      margin-left: $note-icon-gutter-width;
-
-      @include notes-media('min', map-get($grid-breakpoints, sm)) {
-        margin-left: 0;
-      }
-    }
-
     &.being-posted {
       pointer-events: none;
       opacity: 0.5;
+      padding: $gl-padding;
 
       .dummy-avatar {
         background-color: $gl-gray-200;
@@ -104,12 +187,6 @@ ul.notes {
       }
     }
 
-    &.note-discussion {
-      .timeline-entry-inner {
-        padding: $gl-padding 10px;
-      }
-    }
-
     .editing-spinner {
       display: none;
     }
@@ -191,8 +268,9 @@ ul.notes {
   }
 
   .system-note {
-    font-size: 14px;
-    clear: both;
+    padding: 6px $gl-padding-24;
+    margin: $gl-padding-24 0;
+    background-color: transparent;
 
     .note-header-info {
       padding-bottom: 0;
@@ -225,17 +303,21 @@ ul.notes {
 
     .timeline-icon {
       float: left;
-
-      @include notes-media('min', map-get($grid-breakpoints, sm)) {
-        margin-left: 0;
-        width: auto;
-      }
+      display: flex;
+      align-items: center;
+      background-color: $white-light;
+      width: $system-note-icon-size;
+      height: $system-note-icon-size;
+      border: 1px solid $border-color;
+      border-radius: $system-note-icon-size;
+      margin: -6px $gl-padding 0 0;
 
       svg {
-        width: 16px;
-        height: 16px;
+        width: $system-note-svg-size;
+        height: $system-note-svg-size;
         fill: $gray-darkest;
-        margin-top: 2px;
+        display: block;
+        margin: 0 auto;
       }
     }
 
@@ -302,10 +384,17 @@ ul.notes {
 .discussion-body .diff-file {
   .file-title {
     cursor: default;
+    line-height: 42px;
+    padding: 0 $gl-padding;
+    border-top: 1px solid $border-color;
 
     &:hover {
       background-color: $gray-light;
     }
+
+    .btn-clipboard {
+      top: 10px;
+    }
   }
 
   .line_content {
@@ -320,6 +409,23 @@ ul.notes {
     }
   }
 
+  .discussion-notes {
+    &:not(:first-child) {
+      border-top: 1px solid $white-normal;
+      margin-top: 20px;
+    }
+
+    &:not(:last-child) {
+      border-bottom: 1px solid $white-normal;
+      margin-bottom: 20px;
+    }
+
+    .system-note {
+      margin: 0;
+      padding: $gl-padding;
+    }
+  }
+
   // Merge request notes in diffs
   // Diff is inline
   .notes_content .note-header .note-headline-light {
@@ -335,7 +441,6 @@ ul.notes {
       border-left: 0;
 
       &.notes_content {
-        background-color: $gray-light;
         border-width: 1px 0;
         padding: 0;
         vertical-align: top;
@@ -349,18 +454,6 @@ ul.notes {
           }
         }
 
-        .discussion-notes {
-          &:not(:first-child) {
-            border-top: 1px solid $white-normal;
-            margin-top: 20px;
-          }
-
-          &:not(:last-child) {
-            border-bottom: 1px solid $white-normal;
-            margin-bottom: 20px;
-          }
-        }
-
         .notes {
           background-color: $white-light;
         }
@@ -374,6 +467,30 @@ ul.notes {
   }
 }
 
+.diffs {
+  .discussion-notes {
+    margin-left: 0;
+    border-left: 0;
+
+    .notes {
+      position: relative;
+      @include vertical-line(52px);
+    }
+  }
+
+  .note-wrapper {
+    margin: $gl-padding;
+    border: 1px solid $border-color;
+    border-radius: $border-radius-default;
+  }
+
+  .discussion-reply-holder {
+    border-radius: 0 0 $border-radius-default $border-radius-default;
+    border-top: 1px solid $border-color;
+    position: relative;
+  }
+}
+
 .discussion-header,
 .note-header-info {
   a {
@@ -399,7 +516,17 @@ ul.notes {
 }
 
 .discussion-header {
-  font-size: 14px;
+  min-height: 72px;
+
+  .note-header-info {
+    padding-bottom: 0;
+  }
+}
+
+.unresolved {
+  .note-header-info {
+    margin-top: $gl-padding-8;
+  }
 }
 
 .note-header {
@@ -409,7 +536,7 @@ ul.notes {
 
 .note-header-info {
   min-width: 0;
-  padding-bottom: 8px;
+  padding-bottom: $gl-padding-8;
 
   &.discussion {
     padding-bottom: 0;
@@ -471,9 +598,18 @@ ul.notes {
   margin-left: 10px;
   color: $gray-darkest;
 
+  @include media-breakpoint-down(xs) {
+    width: 100%;
+    margin: $gl-padding-8 0;
+  }
+
   .btn-group > .discussion-next-btn {
     margin-left: -1px;
   }
+
+  svg {
+    height: 15px;
+  }
 }
 
 .note-actions {
@@ -585,19 +721,6 @@ ul.notes {
   z-index: 10;
 }
 
-.discussion-body,
-.diff-file {
-  .notes .note {
-    border-bottom: 1px solid $white-normal;
-
-    .timeline-entry-inner {
-      padding-left: $gl-padding;
-      padding-right: $gl-padding;
-      border-bottom: 0;
-    }
-  }
-}
-
 .disabled-comment {
   background-color: $gray-light;
   border-radius: $border-radius-base;
@@ -634,7 +757,7 @@ ul.notes {
   }
 
   .btn {
-    svg path {
+    svg {
       fill: $gray-darkest;
     }
 
@@ -659,7 +782,7 @@ ul.notes {
 .line-resolve-all {
   vertical-align: middle;
   display: inline-block;
-  padding: 5px 10px 6px;
+  padding: 6px 10px;
   background-color: $gray-light;
   border: 1px solid $border-color;
   border-radius: $border-radius-default;

app/views/shared/notes/_notes_with_form.html.haml

@@ -7,8 +7,8 @@
 = render 'shared/notes/edit_form', project: @project
 
 - if can_create_note?
-  %ul.notes.notes-form.timeline
-    %li.timeline-entry
+  .notes.notes-form.timeline
+    .timeline-entry
       .timeline-entry-inner
         .flash-container.timeline-content
 

locale/gitlab.pot

@@ -3591,6 +3591,9 @@ msgstr ""
 msgid "Last edited by %{name}"
 msgstr ""
 
+msgid "Last reply by"
+msgstr ""
+
 msgid "Last update"
 msgstr ""
 
@@ -4192,6 +4195,9 @@ msgstr ""
 msgid "Notes|Are you sure you want to cancel creating this comment?"
 msgstr ""
 
+msgid "Notes|Collapse replies"
+msgstr ""
+
 msgid "Notes|Show all activity"
 msgstr ""
 
@@ -7568,6 +7574,11 @@ msgstr ""
 msgid "remove due date"
 msgstr ""
 
+msgid "reply"
+msgid_plural "replies"
+msgstr[0] ""
+msgstr[1] ""
+
 msgid "source"
 msgstr ""
 

spec/javascripts/notes/components/noteable_discussion_spec.js

@@ -3,6 +3,7 @@ import createStore from '~/notes/stores';
 import noteableDiscussion from '~/notes/components/noteable_discussion.vue';
 import '~/behaviors/markdown/render_gfm';
 import { noteableDataMock, discussionMock, notesDataMock } from '../mock_data';
+import mockDiffFile from '../../diffs/mock_data/diff_file';
 
 const discussionWithTwoUnresolvedNotes = 'merge_requests/resolved_diff_discussion.json';
 
@@ -33,9 +34,20 @@ describe('noteable_discussion component', () => {
     expect(vm.$el.querySelector('.user-avatar-link')).not.toBeNull();
   });
 
+  it('should not render discussion header for non diff discussions', () => {
+    expect(vm.$el.querySelector('.discussion-header')).toBeNull();
+  });
+
   it('should render discussion header', () => {
-    expect(vm.$el.querySelector('.discussion-header')).not.toBeNull();
-    expect(vm.$el.querySelector('.notes').children.length).toEqual(discussionMock.notes.length);
+    const discussion = { ...discussionMock };
+    discussion.diff_file = mockDiffFile;
+    discussion.diff_discussion = true;
+    const diffDiscussionVm = new Component({
+      store,
+      propsData: { discussion },
+    }).$mount();
+
+    expect(diffDiscussionVm.$el.querySelector('.discussion-header')).not.toBeNull();
   });
 
   describe('actions', () => {

spec/javascripts/notes/components/toggle_replies_widget_spec.js

+import Vue from 'vue';
+import toggleRepliesWidget from '~/notes/components/toggle_replies_widget.vue';
+import mountComponent from 'spec/helpers/vue_mount_component_helper';
+import { note } from '../mock_data';
+
+const deepCloneObject = obj => JSON.parse(JSON.stringify(obj));
+
+describe('toggle replies widget for notes', () => {
+  let vm;
+  let ToggleRepliesWidget;
+  const noteFromOtherUser = deepCloneObject(note);
+  noteFromOtherUser.author.username = 'fatihacet';
+
+  const noteFromAnotherUser = deepCloneObject(note);
+  noteFromAnotherUser.author.username = 'mgreiling';
+  noteFromAnotherUser.author.name = 'Mike Greiling';
+
+  const replies = [note, note, note, noteFromOtherUser, noteFromAnotherUser];
+
+  beforeEach(() => {
+    ToggleRepliesWidget = Vue.extend(toggleRepliesWidget);
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  describe('collapsed state', () => {
+    beforeEach(() => {
+      vm = mountComponent(ToggleRepliesWidget, {
+        replies,
+        collapsed: true,
+      });
+    });
+
+    it('should render the collapsed', () => {
+      const vmTextContent = vm.$el.textContent.replace(/\s\s+/g, ' ');
+
+      expect(vm.$el.classList.contains('collapsed')).toEqual(true);
+      expect(vm.$el.querySelectorAll('.user-avatar-link').length).toEqual(3);
+      expect(vm.$el.querySelector('time')).not.toBeNull();
+      expect(vmTextContent).toContain('5 replies');
+      expect(vmTextContent).toContain(`Last reply by ${noteFromAnotherUser.author.name}`);
+    });
+
+    it('should emit toggle event when the replies text clicked', () => {
+      const spy = spyOn(vm, '$emit');
+
+      vm.$el.querySelector('.js-replies-text').click();
+
+      expect(spy).toHaveBeenCalledWith('toggle');
+    });
+  });
+
+  describe('expanded state', () => {
+    beforeEach(() => {
+      vm = mountComponent(ToggleRepliesWidget, {
+        replies,
+        collapsed: false,
+      });
+    });
+
+    it('should render expanded state', () => {
+      const vmTextContent = vm.$el.textContent.replace(/\s\s+/g, ' ');
+
+      expect(vm.$el.querySelector('.collapse-replies-btn')).not.toBeNull();
+      expect(vmTextContent).toContain('Collapse replies');
+    });
+
+    it('should emit toggle event when the collapse replies text called', () => {
+      const spy = spyOn(vm, '$emit');
+
+      vm.$el.querySelector('.js-collapse-replies').click();
+
+      expect(spy).toHaveBeenCalledWith('toggle');
+    });
+  });
+});

spec/support/features/discussion_comments_shared_example.rb

@@ -150,17 +150,25 @@ shared_examples 'discussion comments' do |resource_name|
         end
 
         if resource_name == 'merge request'
-          let(:note_id) { find("#{comments_selector} .note", match: :first)['data-note-id'] }
+          let(:note_id) { find("#{comments_selector} .note:first-child", match: :first)['data-note-id'] }
+          let(:reply_id) { find("#{comments_selector} .note:last-child", match: :first)['data-note-id'] }
 
           it 'shows resolved discussion when toggled' do
+            find("#{comments_selector} .js-vue-discussion-reply").click
+            find("#{comments_selector} .note-textarea").send_keys('a')
+
+            click_button "Comment"
+            wait_for_requests
+
             click_button "Resolve discussion"
+            wait_for_requests
 
             expect(page).to have_selector(".note-row-#{note_id}", visible: true)
 
             refresh
-            click_button "Toggle discussion"
+            click_button "1 reply"
 
-            expect(page).to have_selector(".note-row-#{note_id}", visible: true)
+            expect(page).to have_selector(".note-row-#{reply_id}", visible: true)
           end
         end
       end