Create Web IDE MR and branch picker

28 files changed, 736 insertions, 218 deletions

diff --git a/app/assets/javascripts/api.js b/app/assets/javascripts/api.js
index 422becb7db8..25fe2ae553e 100644
--- a/app/assets/javascripts/api.js
+++ b/app/assets/javascripts/api.js
@@ -244,6 +244,18 @@ const Api = {
     });
   },
 
+  branches(id, query = '', options = {}) {
+    const url = Api.buildUrl(this.createBranchPath).replace(':id', encodeURIComponent(id));
+
+    return axios.get(url, {
+      params: {
+        search: query,
+        per_page: 20,
+        ...options,
+      },
+    });
+  },
+
   createBranch(id, { ref, branch }) {
     const url = Api.buildUrl(this.createBranchPath).replace(':id', encodeURIComponent(id));
 
diff --git a/app/assets/javascripts/ide/components/branches/item.vue b/app/assets/javascripts/ide/components/branches/item.vue
new file mode 100644
index 00000000000..cc3e84e3f77
--- /dev/null
+++ b/app/assets/javascripts/ide/components/branches/item.vue
@@ -0,0 +1,60 @@
+<script>
+import Icon from '~/vue_shared/components/icon.vue';
+import Timeago from '~/vue_shared/components/time_ago_tooltip.vue';
+import router from '../../ide_router';
+
+export default {
+  components: {
+    Icon,
+    Timeago,
+  },
+  props: {
+    item: {
+      type: Object,
+      required: true,
+    },
+    projectId: {
+      type: String,
+      required: true,
+    },
+    isActive: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+  computed: {
+    branchHref() {
+      return router.resolve(`/project/${this.projectId}/edit/${this.item.name}`).href;
+    },
+  },
+};
+</script>
+
+<template>
+  <a
+    :href="branchHref"
+    class="btn-link d-flex align-items-center"
+  >
+    <span class="d-flex append-right-default ide-search-list-current-icon">
+      <icon
+        v-if="isActive"
+        :size="18"
+        name="mobile-issue-close"
+      />
+    </span>
+    <span>
+      <strong>
+        {{ item.name }}
+      </strong>
+      <span
+        class="ide-merge-request-project-path d-block mt-1"
+      >
+        Updated
+        <timeago
+          :time="item.committedDate || ''"
+        />
+      </span>
+    </span>
+  </a>
+</template>
diff --git a/app/assets/javascripts/ide/components/branches/search_list.vue b/app/assets/javascripts/ide/components/branches/search_list.vue
new file mode 100644
index 00000000000..6db7b9d6b0e
--- /dev/null
+++ b/app/assets/javascripts/ide/components/branches/search_list.vue
@@ -0,0 +1,111 @@
+<script>
+import { mapActions, mapState } from 'vuex';
+import _ from 'underscore';
+import LoadingIcon from '~/vue_shared/components/loading_icon.vue';
+import Icon from '~/vue_shared/components/icon.vue';
+import Item from './item.vue';
+
+export default {
+  components: {
+    LoadingIcon,
+    Item,
+    Icon,
+  },
+  data() {
+    return {
+      search: '',
+    };
+  },
+  computed: {
+    ...mapState('branches', ['branches', 'isLoading']),
+    ...mapState(['currentBranchId', 'currentProjectId']),
+    hasBranches() {
+      return this.branches.length !== 0;
+    },
+    hasNoSearchResults() {
+      return this.search !== '' && !this.hasBranches;
+    },
+  },
+  watch: {
+    isLoading: {
+      handler: 'focusSearch',
+    },
+  },
+  mounted() {
+    this.loadBranches();
+  },
+  methods: {
+    ...mapActions('branches', ['fetchBranches']),
+    loadBranches() {
+      this.fetchBranches({ search: this.search });
+    },
+    searchBranches: _.debounce(function debounceSearch() {
+      this.loadBranches();
+    }, 250),
+    focusSearch() {
+      if (!this.isLoading) {
+        this.$nextTick(() => {
+          this.$refs.searchInput.focus();
+        });
+      }
+    },
+    isActiveBranch(item) {
+      return item.name === this.currentBranchId;
+    },
+  },
+};
+</script>
+
+<template>
+  <div>
+    <div class="dropdown-input mt-3 pb-3 mb-0 border-bottom">
+      <div class="position-relative">
+        <input
+          ref="searchInput"
+          :placeholder="__('Search branches')"
+          v-model="search"
+          type="search"
+          class="form-control dropdown-input-field"
+          @input="searchBranches"
+        />
+        <icon
+          :size="18"
+          name="search"
+          class="input-icon"
+        />
+      </div>
+    </div>
+    <div class="dropdown-content ide-merge-requests-dropdown-content d-flex">
+      <loading-icon
+        v-if="isLoading"
+        class="mt-3 mb-3 align-self-center ml-auto mr-auto"
+        size="2"
+      />
+      <ul
+        v-else
+        class="mb-3 w-100"
+      >
+        <template v-if="hasBranches">
+          <li
+            v-for="item in branches"
+            :key="item.name"
+          >
+            <item
+              :item="item"
+              :project-id="currentProjectId"
+              :is-active="isActiveBranch(item)"
+            />
+          </li>
+        </template>
+        <li
+          v-else
+          class="ide-search-list-empty d-flex align-items-center justify-content-center"
+        >
+          <template v-if="hasNoSearchResults">
+            {{ __('No branches found') }}
+          </template>
+        </li>
+      </ul>
+    </div>
+  </div>
+</template>
diff --git a/app/assets/javascripts/ide/components/ide_tree.vue b/app/assets/javascripts/ide/components/ide_tree.vue
index 33f1179a234..39d46a91731 100644
--- a/app/assets/javascripts/ide/components/ide_tree.vue
+++ b/app/assets/javascripts/ide/components/ide_tree.vue
@@ -41,7 +41,7 @@ export default {
       slot="header"
     >
       {{ __('Edit') }}
-      <div class="ml-auto d-flex">
+      <div class="ide-tree-actions ml-auto d-flex">
         <new-entry-button
           :label="__('New file')"
           :show-label="false"
diff --git a/app/assets/javascripts/ide/components/ide_tree_list.vue b/app/assets/javascripts/ide/components/ide_tree_list.vue
index e303ff6ea8f..5611b37be7c 100644
--- a/app/assets/javascripts/ide/components/ide_tree_list.vue
+++ b/app/assets/javascripts/ide/components/ide_tree_list.vue
@@ -3,14 +3,14 @@ import { mapActions, mapGetters, mapState } from 'vuex';
 import Icon from '~/vue_shared/components/icon.vue';
 import SkeletonLoadingContainer from '~/vue_shared/components/skeleton_loading_container.vue';
 import RepoFile from './repo_file.vue';
-import NewDropdown from './new_dropdown/index.vue';
+import NavDropdown from './nav_dropdown.vue';
 
 export default {
   components: {
     Icon,
     RepoFile,
     SkeletonLoadingContainer,
-    NewDropdown,
+    NavDropdown,
   },
   props: {
     viewerType: {
@@ -57,6 +57,7 @@ export default {
         :class="headerClass"
         class="ide-tree-header"
       >
+        <nav-dropdown />
         <slot name="header"></slot>
       </header>
       <div
diff --git a/app/assets/javascripts/ide/components/merge_requests/dropdown.vue b/app/assets/javascripts/ide/components/merge_requests/dropdown.vue
deleted file mode 100644
index 4b9824bf04b..00000000000
--- a/app/assets/javascripts/ide/components/merge_requests/dropdown.vue
+++ /dev/null
@@ -1,63 +0,0 @@
-<script>
-import { mapGetters } from 'vuex';
-import Tabs from '../../../vue_shared/components/tabs/tabs';
-import Tab from '../../../vue_shared/components/tabs/tab.vue';
-import List from './list.vue';
-
-export default {
-  components: {
-    Tabs,
-    Tab,
-    List,
-  },
-  props: {
-    show: {
-      type: Boolean,
-      required: true,
-    },
-  },
-  computed: {
-    ...mapGetters('mergeRequests', ['assignedData', 'createdData']),
-    createdMergeRequestLength() {
-      return this.createdData.mergeRequests.length;
-    },
-    assignedMergeRequestLength() {
-      return this.assignedData.mergeRequests.length;
-    },
-  },
-};
-</script>
-
-<template>
-  <div class="dropdown-menu ide-merge-requests-dropdown p-0">
-    <tabs
-      v-if="show"
-      stop-propagation
-    >
-      <tab active>
-        <template slot="title">
-          {{ __('Created by me') }}
-          <span class="badge badge-pill">
-            {{ createdMergeRequestLength }}
-          </span>
-        </template>
-        <list
-          :empty-text="__('You have not created any merge requests')"
-          type="created"
-        />
-      </tab>
-      <tab>
-        <template slot="title">
-          {{ __('Assigned to me') }}
-          <span class="badge badge-pill">
-            {{ assignedMergeRequestLength }}
-          </span>
-        </template>
-        <list
-          :empty-text="__('You do not have any assigned merge requests')"
-          type="assigned"
-        />
-      </tab>
-    </tabs>
-  </div>
-</template>
diff --git a/app/assets/javascripts/ide/components/merge_requests/item.vue b/app/assets/javascripts/ide/components/merge_requests/item.vue
index 4e18376bd48..0c4ea80ba08 100644
--- a/app/assets/javascripts/ide/components/merge_requests/item.vue
+++ b/app/assets/javascripts/ide/components/merge_requests/item.vue
@@ -1,5 +1,6 @@
 <script>
 import Icon from '../../../vue_shared/components/icon.vue';
+import router from '../../ide_router';
 
 export default {
   components: {
@@ -29,22 +30,21 @@ export default {
     pathWithID() {
       return `${this.item.projectPathWithNamespace}!${this.item.iid}`;
     },
-  },
-  methods: {
-    clickItem() {
-      this.$emit('click', this.item);
+    mergeRequestHref() {
+      const path = `/project/${this.item.projectPathWithNamespace}/merge_requests/${this.item.iid}`;
+
+      return router.resolve(path).href;
     },
   },
 };
 </script>
 
 <template>
-  <button
-    type="button"
+  <a
+    :href="mergeRequestHref"
     class="btn-link d-flex align-items-center"
-    @click="clickItem"
   >
-    <span class="d-flex append-right-default ide-merge-request-current-icon">
+    <span class="d-flex append-right-default ide-search-list-current-icon">
       <icon
         v-if="isActive"
         :size="18"
@@ -59,5 +59,5 @@ export default {
         {{ pathWithID }}
       </span>
     </span>
-  </button>
+  </a>
 </template>
diff --git a/app/assets/javascripts/ide/components/merge_requests/list.vue b/app/assets/javascripts/ide/components/merge_requests/list.vue
index 19d3e48ee10..fc612956688 100644
--- a/app/assets/javascripts/ide/components/merge_requests/list.vue
+++ b/app/assets/javascripts/ide/components/merge_requests/list.vue
@@ -1,96 +1,101 @@
 <script>
-import { mapActions, mapGetters, mapState } from 'vuex';
+import { mapActions, mapState } from 'vuex';
 import _ from 'underscore';
-import LoadingIcon from '../../../vue_shared/components/loading_icon.vue';
+import { __ } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+import LoadingIcon from '~/vue_shared/components/loading_icon.vue';
 import Item from './item.vue';
+import TokenedInput from '../shared/tokened_input.vue';
+
+const SEARCH_TYPES = [
+  { type: 'created', label: __('Created by me') },
+  { type: 'assigned', label: __('Assigned to me') },
+];
 
 export default {
   components: {
     LoadingIcon,
+    TokenedInput,
     Item,
-  },
-  props: {
-    type: {
-      type: String,
-      required: true,
-    },
-    emptyText: {
-      type: String,
-      required: true,
-    },
+    Icon,
   },
   data() {
     return {
       search: '',
+      currentSearchType: null,
+      hasSearchFocus: false,
     };
   },
   computed: {
-    ...mapGetters('mergeRequests', ['getData']),
+    ...mapState('mergeRequests', ['mergeRequests', 'isLoading']),
     ...mapState(['currentMergeRequestId', 'currentProjectId']),
-    data() {
-      return this.getData(this.type);
-    },
-    isLoading() {
-      return this.data.isLoading;
-    },
-    mergeRequests() {
-      return this.data.mergeRequests;
-    },
     hasMergeRequests() {
       return this.mergeRequests.length !== 0;
     },
     hasNoSearchResults() {
       return this.search !== '' && !this.hasMergeRequests;
     },
+    showSearchTypes() {
+      return this.hasSearchFocus && !this.search && !this.currentSearchType;
+    },
+    type() {
+      return this.currentSearchType
+        ? this.currentSearchType.type
+        : '';
+    },
+    searchTokens() {
+      return this.currentSearchType
+        ? [this.currentSearchType]
+        : [];
+    },
   },
   watch: {
-    isLoading: {
-      handler: 'focusSearch',
+    search() {
+      // When the search is updated, let's turn off this flag to hide the search types
+      this.hasSearchFocus = false;
     },
   },
   mounted() {
     this.loadMergeRequests();
   },
   methods: {
-    ...mapActions('mergeRequests', ['fetchMergeRequests', 'openMergeRequest']),
+    ...mapActions('mergeRequests', ['fetchMergeRequests']),
     loadMergeRequests() {
       this.fetchMergeRequests({ type: this.type, search: this.search });
     },
-    viewMergeRequest(item) {
-      this.openMergeRequest({
-        projectPath: item.projectPathWithNamespace,
-        id: item.iid,
-      });
-    },
     searchMergeRequests: _.debounce(function debounceSearch() {
       this.loadMergeRequests();
     }, 250),
-    focusSearch() {
-      if (!this.isLoading) {
-        this.$nextTick(() => {
-          this.$refs.searchInput.focus();
-        });
-      }
+    onSearchFocus() {
+      this.hasSearchFocus = true;
+    },
+    setSearchType(searchType) {
+      this.currentSearchType = searchType;
+      this.loadMergeRequests();
     },
   },
+  searchTypes: SEARCH_TYPES,
 };
 </script>
 
 <template>
   <div>
     <div class="dropdown-input mt-3 pb-3 mb-0 border-bottom">
-      <input
-        ref="searchInput"
-        :placeholder="__('Search merge requests')"
-        v-model="search"
-        type="search"
-        class="dropdown-input-field"
-        @input="searchMergeRequests"
-      />
-      <i
-        aria-hidden="true"
-        class="fa fa-search dropdown-input-search"
-      ></i>
+      <div class="position-relative">
+        <tokened-input
+          v-model="search"
+          :tokens="searchTokens"
+          :placeholder="__('Search merge requests')"
+          @focus="onSearchFocus"
+          @input="searchMergeRequests"
+          @removeToken="setSearchType(null)"
+        />
+        <icon
+          :size="18"
+          name="search"
+          class="input-icon"
+        />
+      </div>
     </div>
     <div class="dropdown-content ide-merge-requests-dropdown-content d-flex">
       <loading-icon
@@ -98,35 +103,52 @@ export default {
         class="mt-3 mb-3 align-self-center ml-auto mr-auto"
         size="2"
       />
-      <ul
-        v-else
-        class="mb-3 w-100"
-      >
-        <template v-if="hasMergeRequests">
-          <li
-            v-for="item in mergeRequests"
-            :key="item.id"
-          >
-            <item
-              :item="item"
-              :current-id="currentMergeRequestId"
-              :current-project-id="currentProjectId"
-              @click="viewMergeRequest"
-            />
-          </li>
-        </template>
-        <li
-          v-else
-          class="ide-merge-requests-empty d-flex align-items-center justify-content-center"
+      <template v-else>
+        <ul
+          class="mb-3 w-100"
         >
-          <template v-if="hasNoSearchResults">
-            {{ __('No merge requests found') }}
+          <template v-if="showSearchTypes">
+            <li
+              v-for="searchType in $options.searchTypes"
+              :key="searchType.type"
+            >
+              <button
+                type="button"
+                class="btn-link d-flex align-items-center"
+                @click.stop="setSearchType(searchType)"
+              >
+                <span class="d-flex append-right-default ide-search-list-current-icon">
+                  <icon
+                    :size="18"
+                    name="search"
+                  />
+                </span>
+                <span>
+                  {{ searchType.label }}
+                </span>
+              </button>
+            </li>
           </template>
-          <template v-else>
-            {{ emptyText }}
+          <template v-else-if="hasMergeRequests">
+            <li
+              v-for="item in mergeRequests"
+              :key="item.id"
+            >
+              <item
+                :item="item"
+                :current-id="currentMergeRequestId"
+                :current-project-id="currentProjectId"
+              />
+            </li>
           </template>
-        </li>
-      </ul>
+          <li
+            v-else
+            class="ide-search-list-empty d-flex align-items-center justify-content-center"
+          >
+            {{ __('No merge requests found') }}
+          </li>
+        </ul>
+      </template>
     </div>
   </div>
 </template>
diff --git a/app/assets/javascripts/ide/components/nav_dropdown.vue b/app/assets/javascripts/ide/components/nav_dropdown.vue
new file mode 100644
index 00000000000..db36779c395
--- /dev/null
+++ b/app/assets/javascripts/ide/components/nav_dropdown.vue
@@ -0,0 +1,59 @@
+<script>
+import $ from 'jquery';
+import Icon from '~/vue_shared/components/icon.vue';
+import NavForm from './nav_form.vue';
+import NavDropdownButton from './nav_dropdown_button.vue';
+
+export default {
+  components: {
+    Icon,
+    NavDropdownButton,
+    NavForm,
+  },
+  data() {
+    return {
+      isVisibleDropdown: false,
+    };
+  },
+  mounted() {
+    this.addDropdownListeners();
+  },
+  beforeDestroy() {
+    this.removeDropdownListeners();
+  },
+  methods: {
+    addDropdownListeners() {
+      $(this.$refs.dropdown)
+        .on('show.bs.dropdown', () => this.showDropdown())
+        .on('hide.bs.dropdown', () => this.hideDropdown());
+    },
+    removeDropdownListeners() {
+      $(this.$refs.dropdown)
+        .off('show.bs.dropdown')
+        .off('hide.bs.dropdown');
+    },
+    showDropdown() {
+      this.isVisibleDropdown = true;
+    },
+    hideDropdown() {
+      this.isVisibleDropdown = false;
+    },
+  },
+};
+</script>
+
+<template>
+  <div
+    ref="dropdown"
+    class="btn-group ide-nav-dropdown dropdown"
+  >
+    <nav-dropdown-button />
+    <div
+      class="dropdown-menu dropdown-menu-left p-0"
+    >
+      <nav-form
+        v-if="isVisibleDropdown"
+      />
+    </div>
+  </div>
+</template>
diff --git a/app/assets/javascripts/ide/components/nav_dropdown_button.vue b/app/assets/javascripts/ide/components/nav_dropdown_button.vue
new file mode 100644
index 00000000000..7f98769d484
--- /dev/null
+++ b/app/assets/javascripts/ide/components/nav_dropdown_button.vue
@@ -0,0 +1,54 @@
+<script>
+import { mapState } from 'vuex';
+import DropdownButton from '~/vue_shared/components/dropdown/dropdown_button.vue';
+import Icon from '~/vue_shared/components/icon.vue';
+
+const EMPTY_LABEL = '-';
+
+export default {
+  components: {
+    Icon,
+    DropdownButton,
+  },
+  computed: {
+    ...mapState(['currentBranchId', 'currentMergeRequestId']),
+    mergeRequestLabel() {
+      return this.currentMergeRequestId
+        ? `!${this.currentMergeRequestId}`
+        : EMPTY_LABEL;
+    },
+    branchLabel() {
+      return this.currentBranchId || EMPTY_LABEL;
+    },
+  },
+};
+</script>
+
+<template>
+  <dropdown-button>
+    <span
+      class="row"
+    >
+      <span
+        class="col-7 text-truncate"
+      >
+        <icon
+          :size="16"
+          :aria-label="__('Current Branch')"
+          name="branch"
+        />
+        {{ branchLabel }}
+      </span>
+      <span
+        class="col-5 pl-0 text-truncate"
+      >
+        <icon
+          :size="16"
+          :aria-label="__('Merge Request')"
+          name="merge-request"
+        />
+        {{ mergeRequestLabel }}
+      </span>
+    </span>
+  </dropdown-button>
+</template>
diff --git a/app/assets/javascripts/ide/components/nav_form.vue b/app/assets/javascripts/ide/components/nav_form.vue
new file mode 100644
index 00000000000..718b836e11c
--- /dev/null
+++ b/app/assets/javascripts/ide/components/nav_form.vue
@@ -0,0 +1,40 @@
+<script>
+import Tabs from '~/vue_shared/components/tabs/tabs';
+import Tab from '~/vue_shared/components/tabs/tab.vue';
+import BranchesSearchList from './branches/search_list.vue';
+import MergeRequestSearchList from './merge_requests/list.vue';
+
+export default {
+  components: {
+    Tabs,
+    Tab,
+    BranchesSearchList,
+    MergeRequestSearchList,
+  },
+};
+</script>
+
+<template>
+  <div
+    class="ide-nav-form p-0"
+  >
+    <tabs
+      stop-propagation
+    >
+      <tab
+        active
+      >
+        <template slot="title">
+          {{ __('Merge Requests') }}
+        </template>
+        <merge-request-search-list />
+      </tab>
+      <tab>
+        <template slot="title">
+          {{ __('Branches') }}
+        </template>
+        <branches-search-list />
+      </tab>
+    </tabs>
+  </div>
+</template>
diff --git a/app/assets/javascripts/ide/components/shared/tokened_input.vue b/app/assets/javascripts/ide/components/shared/tokened_input.vue
new file mode 100644
index 00000000000..a7a12f6785d
--- /dev/null
+++ b/app/assets/javascripts/ide/components/shared/tokened_input.vue
@@ -0,0 +1,121 @@
+<script>
+import { __ } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+
+export default {
+  components: {
+    Icon,
+  },
+  props: {
+    placeholder: {
+      type: String,
+      required: false,
+      default: __('Search'),
+    },
+    tokens: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    value: {
+      type: String,
+      required: false,
+      default: '',
+    },
+  },
+  data() {
+    return {
+      backspaceCount: 0,
+    };
+  },
+  computed: {
+    placeholderText() {
+      return this.tokens.length
+        ? ''
+        : this.placeholder;
+    },
+  },
+  watch: {
+    tokens() {
+      this.$refs.input.focus();
+    },
+  },
+  methods: {
+    onFocus() {
+      this.$emit('focus');
+    },
+    onBlur() {
+      this.$emit('blur');
+    },
+    onInput(evt) {
+      this.$emit('input', evt.target.value);
+    },
+    onBackspace() {
+      if (!this.value && this.tokens.length) {
+        this.backspaceCount += 1;
+      } else {
+        this.backspaceCount = 0;
+        return;
+      }
+
+      if (this.backspaceCount > 1) {
+        this.removeToken(this.tokens[this.tokens.length - 1]);
+        this.backspaceCount = 0;
+      }
+    },
+    removeToken(token) {
+      this.$emit('removeToken', token);
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="filtered-search-wrapper">
+    <div class="filtered-search-box">
+      <div class="tokens-container list-unstyled">
+        <div
+          v-for="token in tokens"
+          :key="token.label"
+          class="filtered-search-token"
+        >
+          <button
+            class="selectable btn-blank"
+            type="button"
+            @click.stop="removeToken(token)"
+            @keyup.delete="removeToken(token)"
+          >
+            <div
+              class="value-container rounded"
+            >
+              <div
+                class="value"
+              >{{ token.label }}</div>
+              <div
+                class="remove-token inverted"
+              >
+                <icon
+                  :size="10"
+                  name="close"
+                />
+              </div>
+            </div>
+          </button>
+        </div>
+        <div class="input-token">
+          <input
+            ref="input"
+            :placeholder="placeholderText"
+            :value="value"
+            type="search"
+            class="form-control filtered-search"
+            @input="onInput"
+            @focus="onFocus"
+            @blur="onBlur"
+            @keyup.delete="onBackspace"
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
diff --git a/app/assets/javascripts/ide/stores/index.js b/app/assets/javascripts/ide/stores/index.js
index f8ce8a67ec0..a601dc8f5a0 100644
--- a/app/assets/javascripts/ide/stores/index.js
+++ b/app/assets/javascripts/ide/stores/index.js
@@ -7,6 +7,7 @@ import mutations from './mutations';
 import commitModule from './modules/commit';
 import pipelines from './modules/pipelines';
 import mergeRequests from './modules/merge_requests';
+import branches from './modules/branches';
 
 Vue.use(Vuex);
 
@@ -20,6 +21,7 @@ export const createStore = () =>
       commit: commitModule,
       pipelines,
       mergeRequests,
+      branches,
     },
   });
 
diff --git a/app/assets/javascripts/ide/stores/modules/branches/actions.js b/app/assets/javascripts/ide/stores/modules/branches/actions.js
new file mode 100644
index 00000000000..74aa98ef9f9
--- /dev/null
+++ b/app/assets/javascripts/ide/stores/modules/branches/actions.js
@@ -0,0 +1,39 @@
+import { __ } from '~/locale';
+import Api from '~/api';
+import * as types from './mutation_types';
+
+export const requestBranches = ({ commit }) => commit(types.REQUEST_BRANCHES);
+export const receiveBranchesError = ({ commit, dispatch }, { search }) => {
+  dispatch(
+    'setErrorMessage',
+    {
+      text: __('Error loading branches.'),
+      action: payload =>
+        dispatch('fetchBranches', payload).then(() =>
+          dispatch('setErrorMessage', null, { root: true }),
+        ),
+      actionText: __('Please try again'),
+      actionPayload: { search },
+    },
+    { root: true },
+  );
+  commit(types.RECEIVE_BRANCHES_ERROR);
+};
+export const receiveBranchesSuccess = ({ commit }, data) =>
+  commit(types.RECEIVE_BRANCHES_SUCCESS, data);
+
+export const fetchBranches = ({ dispatch, rootGetters }, { search = '' }) => {
+  dispatch('requestBranches');
+  dispatch('resetBranches');
+
+  return Api.branches(rootGetters.currentProject.id, search, { sort: 'updated_desc' })
+    .then(({ data }) => dispatch('receiveBranchesSuccess', data))
+    .catch(() => dispatch('receiveBranchesError', { search }));
+};
+
+export const resetBranches = ({ commit }) => commit(types.RESET_BRANCHES);
+
+export const openBranch = ({ rootState, dispatch }, id) =>
+  dispatch('goToRoute', `/project/${rootState.currentProjectId}/edit/${id}`, { root: true });
+
+export default () => {};
diff --git a/app/assets/javascripts/ide/stores/modules/branches/index.js b/app/assets/javascripts/ide/stores/modules/branches/index.js
new file mode 100644
index 00000000000..04e7e0f08f1
--- /dev/null
+++ b/app/assets/javascripts/ide/stores/modules/branches/index.js
@@ -0,0 +1,10 @@
+import state from './state';
+import * as actions from './actions';
+import mutations from './mutations';
+
+export default {
+  namespaced: true,
+  state: state(),
+  actions,
+  mutations,
+};
diff --git a/app/assets/javascripts/ide/stores/modules/branches/mutation_types.js b/app/assets/javascripts/ide/stores/modules/branches/mutation_types.js
new file mode 100644
index 00000000000..2272f7b9531
--- /dev/null
+++ b/app/assets/javascripts/ide/stores/modules/branches/mutation_types.js
@@ -0,0 +1,5 @@
+export const REQUEST_BRANCHES = 'REQUEST_BRANCHES';
+export const RECEIVE_BRANCHES_ERROR = 'RECEIVE_BRANCHES_ERROR';
+export const RECEIVE_BRANCHES_SUCCESS = 'RECEIVE_BRANCHES_SUCCESS';
+
+export const RESET_BRANCHES = 'RESET_BRANCHES';
diff --git a/app/assets/javascripts/ide/stores/modules/branches/mutations.js b/app/assets/javascripts/ide/stores/modules/branches/mutations.js
new file mode 100644
index 00000000000..081ec2d4c28
--- /dev/null
+++ b/app/assets/javascripts/ide/stores/modules/branches/mutations.js
@@ -0,0 +1,21 @@
+/* eslint-disable no-param-reassign */
+import * as types from './mutation_types';
+
+export default {
+  [types.REQUEST_BRANCHES](state) {
+    state.isLoading = true;
+  },
+  [types.RECEIVE_BRANCHES_ERROR](state) {
+    state.isLoading = false;
+  },
+  [types.RECEIVE_BRANCHES_SUCCESS](state, data) {
+    state.isLoading = false;
+    state.branches = data.map(branch => ({
+      name: branch.name,
+      committedDate: branch.commit.committed_date,
+    }));
+  },
+  [types.RESET_BRANCHES](state) {
+    state.branches = [];
+  },
+};
diff --git a/app/assets/javascripts/ide/stores/modules/branches/state.js b/app/assets/javascripts/ide/stores/modules/branches/state.js
new file mode 100644
index 00000000000..89bf220c45f
--- /dev/null
+++ b/app/assets/javascripts/ide/stores/modules/branches/state.js
@@ -0,0 +1,4 @@
+export default () => ({
+  isLoading: false,
+  branches: [],
+});
diff --git a/app/assets/javascripts/ide/stores/modules/merge_requests/actions.js b/app/assets/javascripts/ide/stores/modules/merge_requests/actions.js
index 6ef938b0ae2..baa2497ec5b 100644
--- a/app/assets/javascripts/ide/stores/modules/merge_requests/actions.js
+++ b/app/assets/javascripts/ide/stores/modules/merge_requests/actions.js
@@ -1,12 +1,10 @@
 import { __ } from '../../../../locale';
 import Api from '../../../../api';
-import router from '../../../ide_router';
 import { scopes } from './constants';
 import * as types from './mutation_types';
-import * as rootTypes from '../../mutation_types';
 
-export const requestMergeRequests = ({ commit }, type) =>
-  commit(types.REQUEST_MERGE_REQUESTS, type);
+export const requestMergeRequests = ({ commit }) =>
+  commit(types.REQUEST_MERGE_REQUESTS);
 export const receiveMergeRequestsError = ({ commit, dispatch }, { type, search }) => {
   dispatch(
     'setErrorMessage',
@@ -21,39 +19,22 @@ export const receiveMergeRequestsError = ({ commit, dispatch }, { type, search }
     },
     { root: true },
   );
-  commit(types.RECEIVE_MERGE_REQUESTS_ERROR, type);
+  commit(types.RECEIVE_MERGE_REQUESTS_ERROR);
 };
-export const receiveMergeRequestsSuccess = ({ commit }, { type, data }) =>
-  commit(types.RECEIVE_MERGE_REQUESTS_SUCCESS, { type, data });
+export const receiveMergeRequestsSuccess = ({ commit }, data) =>
+  commit(types.RECEIVE_MERGE_REQUESTS_SUCCESS, data);
 
 export const fetchMergeRequests = ({ dispatch, state: { state } }, { type, search = '' }) => {
-  const scope = scopes[type];
-  dispatch('requestMergeRequests', type);
-  dispatch('resetMergeRequests', type);
+  dispatch('requestMergeRequests');
+  dispatch('resetMergeRequests');
+
+  const scope = type ? scopes[type] : 'all';
 
   return Api.mergeRequests({ scope, state, search })
-    .then(({ data }) => dispatch('receiveMergeRequestsSuccess', { type, data }))
+    .then(({ data }) => dispatch('receiveMergeRequestsSuccess', data))
     .catch(() => dispatch('receiveMergeRequestsError', { type, search }));
 };
 
-export const resetMergeRequests = ({ commit }, type) => commit(types.RESET_MERGE_REQUESTS, type);
-
-export const openMergeRequest = ({ commit, dispatch }, { projectPath, id }) => {
-  commit(rootTypes.CLEAR_PROJECTS, null, { root: true });
-  commit(rootTypes.SET_CURRENT_MERGE_REQUEST, `${id}`, { root: true });
-  commit(rootTypes.RESET_OPEN_FILES, null, { root: true });
-  dispatch('setCurrentBranchId', '', { root: true });
-  dispatch('pipelines/stopPipelinePolling', null, { root: true })
-    .then(() => {
-      dispatch('pipelines/resetLatestPipeline', null, { root: true });
-      dispatch('pipelines/clearEtagPoll', null, { root: true });
-    })
-    .catch(e => {
-      throw e;
-    });
-  dispatch('setRightPane', null, { root: true });
-
-  router.push(`/project/${projectPath}/merge_requests/${id}`);
-};
+export const resetMergeRequests = ({ commit }) => commit(types.RESET_MERGE_REQUESTS);
 
 export default () => {};
diff --git a/app/assets/javascripts/ide/stores/modules/merge_requests/getters.js b/app/assets/javascripts/ide/stores/modules/merge_requests/getters.js
deleted file mode 100644
index 8e2b234be8d..00000000000
--- a/app/assets/javascripts/ide/stores/modules/merge_requests/getters.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export const getData = state => type => state[type];
-
-export const assignedData = state => state.assigned;
-export const createdData = state => state.created;
diff --git a/app/assets/javascripts/ide/stores/modules/merge_requests/index.js b/app/assets/javascripts/ide/stores/modules/merge_requests/index.js
index 2e6dfb420f4..04e7e0f08f1 100644
--- a/app/assets/javascripts/ide/stores/modules/merge_requests/index.js
+++ b/app/assets/javascripts/ide/stores/modules/merge_requests/index.js
@@ -1,6 +1,5 @@
 import state from './state';
 import * as actions from './actions';
-import * as getters from './getters';
 import mutations from './mutations';
 
 export default {
@@ -8,5 +7,4 @@ export default {
   state: state(),
   actions,
   mutations,
-  getters,
 };
diff --git a/app/assets/javascripts/ide/stores/modules/merge_requests/mutations.js b/app/assets/javascripts/ide/stores/modules/merge_requests/mutations.js
index 971da0806bd..98102a68e08 100644
--- a/app/assets/javascripts/ide/stores/modules/merge_requests/mutations.js
+++ b/app/assets/javascripts/ide/stores/modules/merge_requests/mutations.js
@@ -2,15 +2,15 @@
 import * as types from './mutation_types';
 
 export default {
-  [types.REQUEST_MERGE_REQUESTS](state, type) {
-    state[type].isLoading = true;
+  [types.REQUEST_MERGE_REQUESTS](state) {
+    state.isLoading = true;
   },
-  [types.RECEIVE_MERGE_REQUESTS_ERROR](state, type) {
-    state[type].isLoading = false;
+  [types.RECEIVE_MERGE_REQUESTS_ERROR](state) {
+    state.isLoading = false;
   },
-  [types.RECEIVE_MERGE_REQUESTS_SUCCESS](state, { type, data }) {
-    state[type].isLoading = false;
-    state[type].mergeRequests = data.map(mergeRequest => ({
+  [types.RECEIVE_MERGE_REQUESTS_SUCCESS](state, data) {
+    state.isLoading = false;
+    state.mergeRequests = data.map(mergeRequest => ({
       id: mergeRequest.id,
       iid: mergeRequest.iid,
       title: mergeRequest.title,
@@ -20,7 +20,7 @@ export default {
         .replace(`/merge_requests/${mergeRequest.iid}`, ''),
     }));
   },
-  [types.RESET_MERGE_REQUESTS](state, type) {
-    state[type].mergeRequests = [];
+  [types.RESET_MERGE_REQUESTS](state) {
+    state.mergeRequests = [];
   },
 };
diff --git a/app/assets/javascripts/ide/stores/modules/merge_requests/state.js b/app/assets/javascripts/ide/stores/modules/merge_requests/state.js
index 57eb6b04283..4748ccfa2e6 100644
--- a/app/assets/javascripts/ide/stores/modules/merge_requests/state.js
+++ b/app/assets/javascripts/ide/stores/modules/merge_requests/state.js
@@ -1,13 +1,7 @@
 import { states } from './constants';
 
 export default () => ({
-  created: {
-    isLoading: false,
-    mergeRequests: [],
-  },
-  assigned: {
-    isLoading: false,
-    mergeRequests: [],
-  },
+  isLoading: false,
+  mergeRequests: [],
   state: states.opened,
 });
diff --git a/app/assets/javascripts/vue_shared/components/dropdown/dropdown_button.vue b/app/assets/javascripts/vue_shared/components/dropdown/dropdown_button.vue
index 3cba0c5e633..af5ebcdc40a 100644
--- a/app/assets/javascripts/vue_shared/components/dropdown/dropdown_button.vue
+++ b/app/assets/javascripts/vue_shared/components/dropdown/dropdown_button.vue
@@ -38,9 +38,17 @@ export default {
       v-show="isLoading"
       :inline="true"
     />
-    <span class="dropdown-toggle-text">
-      {{ toggleText }}
-    </span>
+    <template>
+      <slot
+        v-if="$slots.default"
+      ></slot>
+      <span
+        v-else
+        class="dropdown-toggle-text"
+      >
+        {{ toggleText }}
+      </span>
+    </template>
     <span
       v-show="!isLoading"
       class="dropdown-toggle-icon"
diff --git a/app/assets/javascripts/vue_shared/components/icon.vue b/app/assets/javascripts/vue_shared/components/icon.vue
index 3cf90b45a97..5e0e7315e99 100644
--- a/app/assets/javascripts/vue_shared/components/icon.vue
+++ b/app/assets/javascripts/vue_shared/components/icon.vue
@@ -1,7 +1,7 @@
 <script>
 
 // only allow classes in images.scss e.g. s12
-const validSizes = [8, 12, 16, 18, 24, 32, 48, 72];
+const validSizes = [8, 10, 12, 16, 18, 24, 32, 48, 72];
 let iconValidator = () => true;
 
 /*
diff --git a/app/assets/stylesheets/framework/dropdowns.scss b/app/assets/stylesheets/framework/dropdowns.scss
index ec4a0f378d0..eebce8b9011 100644
--- a/app/assets/stylesheets/framework/dropdowns.scss
+++ b/app/assets/stylesheets/framework/dropdowns.scss
@@ -571,7 +571,8 @@
   margin-bottom: 10px;
   padding: 0 10px;
 
-  .fa {
+  .fa,
+  .input-icon {
     position: absolute;
     top: 10px;
     right: 20px;
diff --git a/app/assets/stylesheets/framework/images.scss b/app/assets/stylesheets/framework/images.scss
index ab3cceceae9..f878ec1ca91 100644
--- a/app/assets/stylesheets/framework/images.scss
+++ b/app/assets/stylesheets/framework/images.scss
@@ -39,7 +39,7 @@
 svg {
   fill: currentColor;
 
-  $svg-sizes: 8 12 16 18 24 32 48 72;
+  $svg-sizes: 8 10 12 16 18 24 32 48 72;
   @each $svg-size in $svg-sizes {
     &.s#{$svg-size} {
       @include svg-size(#{$svg-size}px);
diff --git a/app/assets/stylesheets/page_bundles/ide.scss b/app/assets/stylesheets/page_bundles/ide.scss
index 37ad6a717d9..c3381e06c30 100644
--- a/app/assets/stylesheets/page_bundles/ide.scss
+++ b/app/assets/stylesheets/page_bundles/ide.scss
@@ -1,6 +1,7 @@
 @import 'framework/variables';
 @import 'framework/mixins';
 
+$search-list-icon-width: 18px;
 $ide-activity-bar-width: 60px;
 $ide-context-header-padding: 10px;
 $ide-project-avatar-end: $ide-context-header-padding + 48px;
@@ -49,7 +50,7 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
   display: flex;
   flex-direction: column;
   flex: 1;
-  overflow: hidden;
+  min-height: 0;
 
   .file {
     height: 32px;
@@ -541,11 +542,11 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
     display: flex;
     flex: 1;
     flex-direction: column;
-    overflow: hidden;
     background-color: $white-light;
     border-left: 1px solid $white-dark;
     border-top: 1px solid $white-dark;
     border-top-left-radius: $border-radius-small;
+    min-height: 0;
   }
 }
 
@@ -1057,6 +1058,7 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
   flex: 0 0 auto;
   display: flex;
   align-items: center;
+  flex-wrap: wrap;
   padding: 12px 0;
   margin-left: $ide-tree-padding;
   margin-right: $ide-tree-padding;
@@ -1066,6 +1068,32 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
     margin-left: auto;
   }
 
+  .ide-nav-dropdown {
+    width: 100%;
+    margin-bottom: 12px;
+
+    .dropdown-menu {
+      width: 385px;
+      max-height: initial;
+    }
+
+    .dropdown-menu-toggle {
+      svg {
+        vertical-align: middle;
+      }
+
+      &:hover {
+        background-color: $white-normal;
+      }
+    }
+
+    &.show {
+      .dropdown-menu-toggle {
+        background-color: $white-dark;
+      }
+    }
+  }
+
   button {
     color: $gl-text-color;
   }
@@ -1181,7 +1209,7 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
 }
 
 .ide-context-body {
-  overflow: hidden;
+  min-height: 0;
 }
 
 .ide-sidebar-project-title {
@@ -1331,7 +1359,7 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
   min-height: 60px;
 }
 
-.ide-merge-requests-dropdown {
+.ide-nav-form {
   .nav-links li {
     width: 50%;
     padding-left: 0;
@@ -1350,22 +1378,36 @@ $ide-tree-text-start: $ide-activity-bar-width + $ide-tree-padding;
     padding-left: $gl-padding;
     padding-right: $gl-padding;
 
-    .fa {
-      right: 26px;
+    .input-icon {
+      right: auto;
+      left: 10px;
+      top: 50%;
+      transform: translateY(-50%);
     }
   }
 
+  .dropdown-input-field {
+    padding-left: $search-list-icon-width + $gl-padding;
+    padding-top: 2px;
+    padding-bottom: 2px;
+  }
+
+  .tokens-container {
+    padding-left: $search-list-icon-width + $gl-padding;
+    overflow-x: hidden;
+  }
+
   .btn-link {
     padding-top: $gl-padding;
     padding-bottom: $gl-padding;
   }
 }
 
-.ide-merge-request-current-icon {
-  min-width: 18px;
+.ide-search-list-current-icon {
+  min-width: $search-list-icon-width;
 }
 
-.ide-merge-requests-empty {
+.ide-search-list-empty {
   height: 230px;
 }