IssueNotesRefactor: Implement jumping to target note.

app/assets/javascripts/lib/utils/common_utils.js

@@ -162,10 +162,11 @@
     gl.utils.scrollToElement = function($el) {
       var top = $el.offset().top;
-      gl.mrTabsHeight = gl.mrTabsHeight || $('.merge-request-tabs').height();
+      var mrTabsHeight = $('.merge-request-tabs').height() || 0;
+      var headerHeight = $('.navbar-gitlab').height() || 0;
       return $('body, html').animate({
-        scrollTop: top - (gl.mrTabsHeight)
+        scrollTop: top - mrTabsHeight - headerHeight
       }, 200);
     };

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

 <script>
 /* global Flash */
+import { mapGetters } from 'vuex';
 import UserAvatarLink from '../../vue_shared/components/user_avatar/user_avatar_link.vue';
 import IssueNoteHeader from './issue_note_header.vue';
 import IssueNoteActions from './issue_note_actions.vue';
@@ -26,6 +27,9 @@ export default {
     IssueNoteBody,
   },
   computed: {
+    ...mapGetters([
+      'targetNoteHash',
+    ]),
     author() {
       return this.note.author;
     },
@@ -33,11 +37,15 @@ export default {
       return {
         'is-editing': this.isEditing,
         'disabled-content': this.isDeleting,
+        target: this.targetNoteHash === this.noteAnchorId,
       };
     },
     canReportAsAbuse() {
       return this.note.report_abuse_path && this.author.id !== window.gon.current_user_id;
     },
+    noteAnchorId() {
+      return `note_${this.note.id}`;
+    },
   },
   methods: {
     editHandler() {
@@ -98,6 +106,7 @@ export default {
 <template>
   <li
     class="note timeline-entry"
+    :id="noteAnchorId"
     :class="classNameBindings">
     <div class="timeline-entry-inner">
       <div class="timeline-icon">
@@ -115,6 +124,7 @@ export default {
             :noteId="note.id"
             actionText="commented" />
           <issue-note-actions
+            :authorId="author.id"
             :accessLevel="note.human_access"
             :canAward="note.emoji_awardable"
             :canEdit="note.current_user.can_edit"

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

@@ -56,6 +56,9 @@ export default {
       this.isExpanded = !this.isExpanded;
       this.toggleHandler();
     },
+    updateTargetNoteHash() {
+      this.$store.commit('setTargetNoteHash', this.noteTimestampLink);
+    },
   },
 };
 </script>
@@ -79,7 +82,9 @@ export default {
           v-if="actionTextHtml"
           v-html="actionTextHtml"
           class="system-note-message"></span>
-        <a :href="noteTimestampLink">
+        <a
+          :href="noteTimestampLink"
+          @click="updateTargetNoteHash">
           <time-ago-tooltip
             :time="createdAt"
             tooltipPlacement="bottom" />

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

@@ -43,6 +43,19 @@ export default {
     componentData(note) {
       return note.individual_note ? note.notes[0] : note;
     },
+    checkLocationHash() {
+      const hash = gl.utils.getLocationHash();
+      const $el = $(`#${hash}`);
+
+      if (hash && $el) {
+        const isInViewport = gl.utils.isInViewport($el[0]);
+        this.$store.commit('setTargetNoteHash', hash);
+
+        if (!isInViewport) {
+          gl.utils.scrollToElement($el);
+        }
+      }
+    },
   },
   mounted() {
     const { discussionsPath, notesPath, lastFetchedAt } = this.$el.parentNode.dataset;
@@ -50,6 +63,11 @@ export default {
     this.$store.dispatch('fetchNotes', discussionsPath)
       .then(() => {
         this.isLoading = false;
+
+        // Scroll to note if we have hash fragment in the page URL
+        Vue.nextTick(() => {
+          this.checkLocationHash();
+        });
       })
       .catch(() => {
         new Flash('Something went wrong while fetching issue comments. Please try again.'); // eslint-disable-line

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

 <script>
+import { mapGetters } from 'vuex';
 import iconsMap from './issue_note_icons';
 import IssueNoteHeader from './issue_note_header.vue';
@@ -17,11 +18,25 @@ export default {
   components: {
     IssueNoteHeader,
   },
+  computed: {
+    ...mapGetters([
+      'targetNoteHash',
+    ]),
+    noteAnchorId() {
+      return `note_${this.note.id}`;
+    },
+    isTargetNote() {
+      return this.targetNoteHash === this.noteAnchorId;
+    },
+  },
 };
 </script>
 <template>
-  <li class="note system-note timeline-entry">
+  <li
+    :id="noteAnchorId"
+    :class="{ target: isTargetNote }"
+    class="note system-note timeline-entry">
     <div class="timeline-entry-inner">
       <div class="timeline-icon">
         <span v-html="svg"></span>

app/assets/javascripts/notes/stores/issue_notes_store.js

@@ -6,18 +6,25 @@ const findNoteObjectById = (notes, id) => notes.filter(n => n.id === id)[0];
 const state = {
   notes: [],
+  targetNoteHash: null,
 };
 const getters = {
   notes(storeState) {
     return storeState.notes;
   },
+  targetNoteHash(storeState) {
+    return storeState.targetNoteHash;
+  },
 };
 const mutations = {
   setInitialNotes(storeState, notes) {
     storeState.notes = notes;
   },
+  setTargetNoteHash(storeState, hash) {
+    storeState.targetNoteHash = hash;
+  },
   toggleDiscussion(storeState, { discussionId }) {
     const discussion = findNoteObjectById(storeState.notes, discussionId);