Merge branch '26200-convert-sidebar-to-dropdown' into 'master'

Resolve "Update global sidebar to dropdown"

Closes #26200

See merge request !9199

25 files changed, 108 insertions, 597 deletions

diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 4b5c9686cab..5d7350ad7be 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -101,11 +101,6 @@ require('es6-promise').polyfill();
       }
     });
 
-    $('.nav-sidebar').niceScroll({
-      cursoropacitymax: '0.4',
-      cursorcolor: '#FFF',
-      cursorborder: '1px solid #FFF'
-    });
     $('.js-select-on-focus').on('focusin', function () {
       return $(this).select().one('mouseup', function (e) {
         return e.preventDefault();
@@ -245,8 +240,6 @@ require('es6-promise').polyfill();
     });
     gl.awardsHandler = new AwardsHandler();
     new Aside();
-    // bind sidebar events
-    new gl.Sidebar();
 
     gl.utils.initTimeagoTimeout();
   });
diff --git a/app/assets/javascripts/project_label_subscription.js.es6 b/app/assets/javascripts/project_label_subscription.js.es6
index 8365f7118d5..0a811627600 100644
--- a/app/assets/javascripts/project_label_subscription.js.es6
+++ b/app/assets/javascripts/project_label_subscription.js.es6
@@ -38,13 +38,15 @@
         this.$buttons.attr('data-status', newStatus);
         this.$buttons.find('> span').text(newAction);
 
-        for (const button of this.$buttons) {
+        this.$buttons.map((button) => {
           const $button = $(button);
 
           if ($button.attr('data-original-title')) {
             $button.tooltip('hide').attr('data-original-title', newAction).tooltip('fixTitle');
           }
-        }
+
+          return button;
+        });
       });
     }
   }
diff --git a/app/assets/javascripts/right_sidebar.js b/app/assets/javascripts/right_sidebar.js
index 76a0f993ea0..f8e42e7a350 100644
--- a/app/assets/javascripts/right_sidebar.js
+++ b/app/assets/javascripts/right_sidebar.js
@@ -21,11 +21,16 @@
     };
 
     Sidebar.prototype.addEventListeners = function() {
+      const $document = $(document);
+      const throttledSetSidebarHeight = _.throttle(this.setSidebarHeight, 10);
+
       this.sidebar.on('click', '.sidebar-collapsed-icon', this, this.sidebarCollapseClicked);
       $('.dropdown').on('hidden.gl.dropdown', this, this.onSidebarDropdownHidden);
       $('.dropdown').on('loading.gl.dropdown', this.sidebarDropdownLoading);
       $('.dropdown').on('loaded.gl.dropdown', this.sidebarDropdownLoaded);
-      $(document).on('click', '.js-sidebar-toggle', function(e, triggered) {
+      $(window).on('resize', () => throttledSetSidebarHeight());
+      $document.on('scroll', () => throttledSetSidebarHeight());
+      $document.on('click', '.js-sidebar-toggle', function(e, triggered) {
         var $allGutterToggleIcons, $this, $thisIcon;
         e.preventDefault();
         $this = $(this);
@@ -191,6 +196,17 @@
       }
     };
 
+    Sidebar.prototype.setSidebarHeight = function() {
+      const $navHeight = $('.navbar-gitlab').outerHeight() + $('.layout-nav').outerHeight();
+      const $rightSidebar = $('.js-right-sidebar');
+      const diff = $navHeight - $('body').scrollTop();
+      if (diff > 0) {
+        $rightSidebar.outerHeight($(window).height() - diff);
+      } else {
+        $rightSidebar.outerHeight('100%');
+      }
+    };
+
     Sidebar.prototype.isOpen = function() {
       return this.sidebar.is('.right-sidebar-expanded');
     };
diff --git a/app/assets/javascripts/sidebar.js.es6 b/app/assets/javascripts/sidebar.js.es6
deleted file mode 100644
index 33e4b7db681..00000000000
--- a/app/assets/javascripts/sidebar.js.es6
+++ /dev/null
@@ -1,111 +0,0 @@
-/* eslint-disable arrow-parens, class-methods-use-this, no-param-reassign */
-/* global Cookies */
-
-(() => {
-  const pinnedStateCookie = 'pin_nav';
-  const sidebarBreakpoint = 1024;
-
-  const pageSelector = '.page-with-sidebar';
-  const navbarSelector = '.navbar-gitlab';
-  const sidebarWrapperSelector = '.sidebar-wrapper';
-  const sidebarContentSelector = '.nav-sidebar';
-
-  const pinnedToggleSelector = '.js-nav-pin';
-  const sidebarToggleSelector = '.toggle-nav-collapse, .side-nav-toggle';
-
-  const pinnedPageClass = 'page-sidebar-pinned';
-  const expandedPageClass = 'page-sidebar-expanded';
-
-  const pinnedNavbarClass = 'header-sidebar-pinned';
-  const expandedNavbarClass = 'header-sidebar-expanded';
-
-  class Sidebar {
-    constructor() {
-      if (!Sidebar.singleton) {
-        Sidebar.singleton = this;
-        Sidebar.singleton.init();
-      }
-
-      return Sidebar.singleton;
-    }
-
-    init() {
-      this.isPinned = Cookies.get(pinnedStateCookie) === 'true';
-      this.isExpanded = (
-        window.innerWidth >= sidebarBreakpoint &&
-        $(pageSelector).hasClass(expandedPageClass)
-      );
-      $(window).on('resize', () => this.setSidebarHeight());
-      $(document)
-        .on('click', sidebarToggleSelector, () => this.toggleSidebar())
-        .on('click', pinnedToggleSelector, () => this.togglePinnedState())
-        .on('click', 'html, body, a, button', (e) => this.handleClickEvent(e))
-        .on('DOMContentLoaded', () => this.renderState())
-        .on('scroll', () => this.setSidebarHeight())
-        .on('todo:toggle', (e, count) => this.updateTodoCount(count));
-      this.renderState();
-      this.setSidebarHeight();
-    }
-
-    handleClickEvent(e) {
-      if (this.isExpanded && (!this.isPinned || window.innerWidth < sidebarBreakpoint)) {
-        const $target = $(e.target);
-        const targetIsToggle = $target.closest(sidebarToggleSelector).length > 0;
-        const targetIsSidebar = $target.closest(sidebarWrapperSelector).length > 0;
-        if (!targetIsToggle && (!targetIsSidebar || $target.closest('a'))) {
-          this.toggleSidebar();
-        }
-      }
-    }
-
-    updateTodoCount(count) {
-      $('.js-todos-count').text(gl.text.addDelimiter(count));
-    }
-
-    toggleSidebar() {
-      this.isExpanded = !this.isExpanded;
-      this.renderState();
-    }
-
-    setSidebarHeight() {
-      const $navHeight = $('.navbar-gitlab').outerHeight() + $('.layout-nav').outerHeight();
-      const diff = $navHeight - $('body').scrollTop();
-      if (diff > 0) {
-        $('.js-right-sidebar').outerHeight($(window).height() - diff);
-      } else {
-        $('.js-right-sidebar').outerHeight('100%');
-      }
-    }
-
-    togglePinnedState() {
-      this.isPinned = !this.isPinned;
-      if (!this.isPinned) {
-        this.isExpanded = false;
-      }
-      Cookies.set(pinnedStateCookie, this.isPinned ? 'true' : 'false', { expires: 3650 });
-      this.renderState();
-    }
-
-    renderState() {
-      $(pageSelector)
-        .toggleClass(pinnedPageClass, this.isPinned && this.isExpanded)
-        .toggleClass(expandedPageClass, this.isExpanded);
-      $(navbarSelector)
-        .toggleClass(pinnedNavbarClass, this.isPinned && this.isExpanded)
-        .toggleClass(expandedNavbarClass, this.isExpanded);
-
-      const $pinnedToggle = $(pinnedToggleSelector);
-      const tooltipText = this.isPinned ? 'Unpin navigation' : 'Pin navigation';
-      const tooltipState = $pinnedToggle.attr('aria-describedby') && this.isExpanded ? 'show' : 'hide';
-      $pinnedToggle.attr('title', tooltipText).tooltip('fixTitle').tooltip(tooltipState);
-
-      if (this.isExpanded) {
-        const sidebarContent = $(sidebarContentSelector);
-        setTimeout(() => { sidebarContent.niceScroll().updateScrollBar(); }, 200);
-      }
-    }
-  }
-
-  window.gl = window.gl || {};
-  gl.Sidebar = Sidebar;
-})();
diff --git a/app/assets/stylesheets/framework.scss b/app/assets/stylesheets/framework.scss
index 08f203a1bf6..39cf3b5f8ae 100644
--- a/app/assets/stylesheets/framework.scss
+++ b/app/assets/stylesheets/framework.scss
@@ -19,7 +19,6 @@
 @import "framework/flash.scss";
 @import "framework/forms.scss";
 @import "framework/gfm.scss";
-@import "framework/gitlab-theme.scss";
 @import "framework/header.scss";
 @import "framework/highlight.scss";
 @import "framework/issue_box.scss";
diff --git a/app/assets/stylesheets/framework/animations.scss b/app/assets/stylesheets/framework/animations.scss
index 0ca5a9343f7..90935b9616b 100644
--- a/app/assets/stylesheets/framework/animations.scss
+++ b/app/assets/stylesheets/framework/animations.scss
@@ -116,7 +116,7 @@
 }
 
 .btn,
-.side-nav-toggle {
+.global-dropdown-toggle {
   @include transition(background-color, border-color, color, box-shadow);
 }
 
@@ -140,7 +140,6 @@ a {
   @include transition(background-color, box-shadow);
 }
 
-.nav-sidebar a,
 .dropdown-menu a,
 .dropdown-menu button,
 .dropdown-menu-nav a {
diff --git a/app/assets/stylesheets/framework/gitlab-theme.scss b/app/assets/stylesheets/framework/gitlab-theme.scss
deleted file mode 100644
index d6566dc4ec9..00000000000
--- a/app/assets/stylesheets/framework/gitlab-theme.scss
+++ /dev/null
@@ -1,144 +0,0 @@
-/**
- * Styles the GitLab application with a specific color theme
- *
- * $color-light  -
- * $color        -
- * $color-darker -
- * $color-dark   -
- */
-@mixin gitlab-theme($color-light, $color, $color-darker, $color-dark) {
-  .page-with-sidebar {
-    .toggle-nav-collapse,
-    .pin-nav-btn {
-      color: $color-light;
-
-      &:hover {
-        color: $white-light;
-      }
-    }
-
-    .sidebar-wrapper {
-      background: $color-darker;
-    }
-
-    .sidebar-action-buttons {
-      color: $color-light;
-      background-color: lighten($color-darker, 5%);
-    }
-
-    .nav-sidebar {
-      li {
-        a {
-          color: $color-light;
-
-          &:hover,
-          &:focus,
-          &:active {
-            background: $color-dark;
-          }
-
-          i {
-            color: $color-light;
-          }
-
-          path,
-          polygon {
-            fill: $color-light;
-          }
-
-          .count {
-            color: $color-light;
-            background: $color-dark;
-          }
-
-          svg {
-            position: relative;
-            top: 3px;
-          }
-        }
-
-        &.separate-item {
-          border-top: 1px solid $color;
-        }
-
-        &.active a {
-          color: $white-light;
-          background: $color-dark;
-
-          &.no-highlight {
-            border: none;
-          }
-
-          i {
-            color: $white-light;
-          }
-
-          path,
-          polygon {
-            fill: $white-light;
-          }
-        }
-      }
-
-      .about-gitlab {
-        color: $color-light;
-      }
-    }
-  }
-}
-
-$theme-charcoal-light: #b9bbbe;
-$theme-charcoal: #485157;
-$theme-charcoal-dark: #3d454d;
-$theme-charcoal-darker: #383f45;
-
-$theme-blue-light: #becde9;
-$theme-blue: #2980b9;
-$theme-blue-dark: #1970a9;
-$theme-blue-darker: #096099;
-
-$theme-graphite-light: #ccc;
-$theme-graphite: #777;
-$theme-graphite-dark: #666;
-$theme-graphite-darker: #555;
-
-$theme-black-light: #979797;
-$theme-black: #373737;
-$theme-black-dark: #272727;
-$theme-black-darker: #222;
-
-$theme-green-light: #adc;
-$theme-green: #019875;
-$theme-green-dark: #018865;
-$theme-green-darker: #017855;
-
-$theme-violet-light: #98c;
-$theme-violet: #548;
-$theme-violet-dark: #436;
-$theme-violet-darker: #325;
-
-body {
-  &.ui_blue {
-    @include gitlab-theme($theme-blue-light, $theme-blue, $theme-blue-dark, $theme-blue-darker);
-  }
-
-  &.ui_charcoal {
-    @include gitlab-theme($theme-charcoal-light, $theme-charcoal, $theme-charcoal-dark, $theme-charcoal-darker);
-  }
-
-  &.ui_graphite {
-    @include gitlab-theme($theme-graphite-light, $theme-graphite, $theme-graphite-dark, $theme-graphite-darker);
-  }
-
-  &.ui_black {
-    @include gitlab-theme($theme-black-light, $theme-black, $theme-black-dark, $theme-black-darker);
-  }
-
-  &.ui_green {
-    @include gitlab-theme($theme-green-light, $theme-green, $theme-green-dark, $theme-green-darker);
-  }
-
-  &.ui_violet {
-    @include gitlab-theme($theme-violet-light, $theme-violet, $theme-violet-dark, $theme-violet-darker);
-  }
-}
diff --git a/app/assets/stylesheets/framework/header.scss b/app/assets/stylesheets/framework/header.scss
index 34e010e0e8a..367289968c9 100644
--- a/app/assets/stylesheets/framework/header.scss
+++ b/app/assets/stylesheets/framework/header.scss
@@ -100,23 +100,42 @@ header {
         }
       }
     }
+  }
 
-    .side-nav-toggle {
-      position: absolute;
-      left: -10px;
-      margin: 7px 0;
-      font-size: 18px;
-      padding: 6px 10px;
-      border: none;
-      background-color: $gray-light;
+  .global-dropdown {
+    position: absolute;
+    left: -10px;
+
+    .badge {
+      font-size: 11px;
+    }
+
+    li {
+      .active a {
+        font-weight: bold;
+      }
 
       &:hover {
-        background-color: $white-normal;
-        color: $gl-header-nav-hover-color;
+        .badge {
+          background-color: $white-light;
+        }
       }
     }
   }
 
+  .global-dropdown-toggle {
+    margin: 7px 0;
+    font-size: 18px;
+    padding: 6px 10px;
+    border: none;
+    background-color: $gray-light;
+
+    &:hover {
+      background-color: $white-normal;
+      color: $gl-header-nav-hover-color;
+    }
+  }
+
   .header-content {
     position: relative;
     height: $header-height;
diff --git a/app/assets/stylesheets/framework/sidebar.scss b/app/assets/stylesheets/framework/sidebar.scss
index 20bcb1eeb23..d09b1c9d7f5 100644
--- a/app/assets/stylesheets/framework/sidebar.scss
+++ b/app/assets/stylesheets/framework/sidebar.scss
@@ -1,36 +1,3 @@
-.page-with-sidebar {
-  padding-bottom: 25px;
-  transition: padding $sidebar-transition-duration;
-
-  &.page-sidebar-pinned {
-    .sidebar-wrapper {
-      box-shadow: none;
-    }
-  }
-
-  .sidebar-wrapper {
-    position: fixed;
-    top: 0;
-    bottom: 0;
-    left: 0;
-    height: 100%;
-    width: 0;
-    overflow: hidden;
-    transition: width $sidebar-transition-duration;
-    box-shadow: 2px 0 16px 0 $black-transparent;
-  }
-}
-
-.sidebar-wrapper {
-  z-index: 1000;
-  background: $gray-light;
-
-  .nicescroll-rails-hr {
-    // TODO: Figure out why nicescroll doesn't hide horizontal bar
-    display: none!important;
-  }
-}
-
 .content-wrapper {
   width: 100%;
   transition: padding $sidebar-transition-duration;
@@ -47,105 +14,6 @@
   }
 }
 
-.nav-sidebar {
-  position: absolute;
-  top: 50px;
-  bottom: 0;
-  width: $sidebar_width;
-  overflow-y: auto;
-  overflow-x: hidden;
-
-  &.navbar-collapse {
-    padding: 0 !important;
-  }
-
-  li {
-    &.separate-item {
-      padding-top: 10px;
-      margin-top: 10px;
-    }
-
-    .icon-container {
-      width: 34px;
-      display: inline-block;
-      text-align: center;
-    }
-
-    a {
-      padding: 7px $gl-sidebar-padding;
-      font-size: $gl-font-size;
-      line-height: 24px;
-      display: block;
-      text-decoration: none;
-      font-weight: normal;
-
-      &:hover,
-      &:active,
-      &:focus {
-        text-decoration: none;
-      }
-
-      i {
-        font-size: 16px;
-      }
-
-      i,
-      svg {
-        margin-right: 13px;
-      }
-    }
-  }
-
-  .count {
-    float: right;
-    padding: 0 8px;
-    border-radius: 6px;
-  }
-
-  .about-gitlab {
-    padding: 7px $gl-sidebar-padding;
-    font-size: $gl-font-size;
-    line-height: 24px;
-    display: block;
-    text-decoration: none;
-    font-weight: normal;
-    position: absolute;
-    bottom: 10px;
-  }
-}
-
-.sidebar-action-buttons {
-  width: $sidebar_width;
-  position: absolute;
-  top: 0;
-  left: 0;
-  min-height: 50px;
-  padding: 5px 0;
-  font-size: 18px;
-  line-height: 30px;
-
-  .toggle-nav-collapse {
-    left: 0;
-  }
-
-  .pin-nav-btn {
-    right: 0;
-    display: none;
-
-    @media (min-width: $sidebar-breakpoint) {
-      display: block;
-    }
-
-    .fa {
-      transition: transform .15s;
-
-      .page-sidebar-pinned & {
-        transform: rotate(90deg);
-      }
-    }
-  }
-}
-
 .nav-header-btn {
   padding: 10px $gl-sidebar-padding;
   color: inherit;
@@ -161,59 +29,16 @@
   }
 }
 
-.page-sidebar-expanded {
-  .sidebar-wrapper {
-    width: $sidebar_width;
-  }
-}
-
-.page-sidebar-pinned {
-  .content-wrapper,
-  .layout-nav {
-    @media (min-width: $sidebar-breakpoint) {
-      padding-left: $sidebar_width;
-    }
-  }
-
-  .merge-request-tabs-holder.affix {
-    @media (min-width: $sidebar-breakpoint) {
-      left: $sidebar_width;
-    }
-  }
-
-  &.right-sidebar-expanded {
-    .line-resolve-all-container {
-      @media (min-width: $sidebar-breakpoint) {
-        display: none;
-      }
-    }
-  }
-}
-
-header.header-sidebar-pinned {
-  @media (min-width: $sidebar-breakpoint) {
-    padding-left: ($sidebar_width + $gl-padding);
-
-    .side-nav-toggle {
-      display: none;
-    }
-
-    .header-content {
-      padding-left: 0;
-    }
-  }
-}
-
 .right-sidebar-collapsed {
   padding-right: 0;
 
   @media (min-width: $screen-sm-min) {
     .content-wrapper {
-      padding-right: $sidebar_collapsed_width;
+      padding-right: $gutter_collapsed_width;
     }
 
     .merge-request-tabs-holder.affix {
-      right: $sidebar_collapsed_width;
+      right: $gutter_collapsed_width;
     }
   }
 
@@ -231,7 +56,7 @@ header.header-sidebar-pinned {
 
   @media (min-width: $screen-sm-min) and (max-width: $screen-sm-max) {
     &:not(.build-sidebar):not(.wiki-sidebar) {
-      padding-right: $sidebar_collapsed_width;
+      padding-right: $gutter_collapsed_width;
     }
   }
 
@@ -245,12 +70,12 @@ header.header-sidebar-pinned {
     }
 
     &.with-overlay .merge-request-tabs-holder.affix {
-      right: $sidebar_collapsed_width;
+      right: $gutter_collapsed_width;
     }
   }
 
   &.with-overlay {
-    padding-right: $sidebar_collapsed_width;
+    padding-right: $gutter_collapsed_width;
   }
 }
 
diff --git a/app/assets/stylesheets/framework/variables.scss b/app/assets/stylesheets/framework/variables.scss
index 7809d4866f1..ba0af072716 100644
--- a/app/assets/stylesheets/framework/variables.scss
+++ b/app/assets/stylesheets/framework/variables.scss
@@ -1,8 +1,6 @@
 /*
  * Layout
  */
-$sidebar_collapsed_width: 62px;
-$sidebar_width: 220px;
 $gutter_collapsed_width: 62px;
 $gutter_width: 290px;
 $gutter_inner_width: 250px;
@@ -541,4 +539,4 @@ Pipeline Graph
 */
 $stage-hover-bg: #eaf3fc;
 $stage-hover-border: #d1e7fc;
-$action-icon-color: #d6d6d6;
\ No newline at end of file
+$action-icon-color: #d6d6d6;
diff --git a/app/assets/stylesheets/pages/issuable.scss b/app/assets/stylesheets/pages/issuable.scss
index a53cc27fac9..4426169ef5a 100644
--- a/app/assets/stylesheets/pages/issuable.scss
+++ b/app/assets/stylesheets/pages/issuable.scss
@@ -253,11 +253,11 @@
       display: block;
     }
 
-    width: $sidebar_collapsed_width;
+    width: $gutter_collapsed_width;
     padding-top: 0;
 
     .block {
-      width: $sidebar_collapsed_width - 2px;
+      width: $gutter_collapsed_width - 2px;
       margin-left: -19px;
       padding: 15px 0 0;
       border-bottom: none;
diff --git a/app/assets/stylesheets/pages/profiles/preferences.scss b/app/assets/stylesheets/pages/profiles/preferences.scss
index 100ace41f2a..305feaacaa1 100644
--- a/app/assets/stylesheets/pages/profiles/preferences.scss
+++ b/app/assets/stylesheets/pages/profiles/preferences.scss
@@ -1,42 +1,3 @@
-.application-theme {
-  label {
-    margin-right: 20px;
-    text-align: center;
-
-    .preview {
-      border-radius: 4px;
-
-      height: 80px;
-      margin-bottom: 10px;
-      width: 160px;
-
-      &.ui_blue {
-        background: $theme-blue;
-      }
-
-      &.ui_charcoal {
-        background: $theme-charcoal;
-      }
-
-      &.ui_graphite {
-        background: $theme-graphite;
-      }
-
-      &.ui_black {
-        background: $theme-black;
-      }
-
-      &.ui_green {
-        background: $theme-green;
-      }
-
-      &.ui_violet {
-        background: $theme-violet;
-      }
-    }
-  }
-}
-
 .syntax-theme {
   label {
     margin-right: 20px;
diff --git a/app/assets/stylesheets/print.scss b/app/assets/stylesheets/print.scss
index 0ff3c3f5472..6cc1cc8e263 100644
--- a/app/assets/stylesheets/print.scss
+++ b/app/assets/stylesheets/print.scss
@@ -31,7 +31,6 @@ nav.navbar-collapse.collapse,
 .blob-commit-info,
 .file-title,
 .file-holder,
-.sidebar-wrapper,
 .nav,
 .btn,
 ul.notes-form,
diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index 1cd50852e89..7ffde71c3b1 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -194,7 +194,6 @@ class Admin::UsersController < Admin::ApplicationController
       :provider,
       :remember_me,
       :skype,
-      :theme_id,
       :twitter,
       :username,
       :website_url
diff --git a/app/controllers/profiles/preferences_controller.rb b/app/controllers/profiles/preferences_controller.rb
index a9a06ecc808..0d891ef4004 100644
--- a/app/controllers/profiles/preferences_controller.rb
+++ b/app/controllers/profiles/preferences_controller.rb
@@ -34,7 +34,6 @@ class Profiles::PreferencesController < Profiles::ApplicationController
       :layout,
       :dashboard,
       :project_view,
-      :theme_id
     )
   end
 end
diff --git a/app/helpers/nav_helper.rb b/app/helpers/nav_helper.rb
index e21178c7377..c1523b4dabf 100644
--- a/app/helpers/nav_helper.rb
+++ b/app/helpers/nav_helper.rb
@@ -1,10 +1,4 @@
 module NavHelper
-  def page_sidebar_class
-    if pinned_nav?
-      "page-sidebar-expanded page-sidebar-pinned"
-    end
-  end
-
   def page_gutter_class
     if current_path?('merge_requests#show') ||
         current_path?('merge_requests#diffs') ||
@@ -32,10 +26,6 @@ module NavHelper
     class_name = ''
     class_name << " with-horizontal-nav" if defined?(nav) && nav
 
-    if pinned_nav?
-      class_name << " header-sidebar-expanded header-sidebar-pinned"
-    end
-
     class_name
   end
 
@@ -46,8 +36,4 @@ module NavHelper
   def nav_control_class
     "nav-control" if current_user
   end
-
-  def pinned_nav?
-    cookies[:pin_nav] == 'true'
-  end
 end
diff --git a/app/helpers/preferences_helper.rb b/app/helpers/preferences_helper.rb
index dd0a4ea03f0..c3a08d76318 100644
--- a/app/helpers/preferences_helper.rb
+++ b/app/helpers/preferences_helper.rb
@@ -41,10 +41,6 @@ module PreferencesHelper
     ]
   end
 
-  def user_application_theme
-    Gitlab::Themes.for_user(current_user).css_class
-  end
-
   def user_color_scheme
     Gitlab::ColorSchemes.for_user(current_user).css_class
   end
diff --git a/app/models/user.rb b/app/models/user.rb
index ad997ce2b13..f614eb66e1f 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -21,7 +21,6 @@ class User < ActiveRecord::Base
   default_value_for :can_create_team, false
   default_value_for :hide_no_ssh_key, false
   default_value_for :hide_no_password, false
-  default_value_for :theme_id, gitlab_config.default_theme
 
   attr_encrypted :otp_secret,
     key:       Gitlab::Application.secrets.otp_key_base,
diff --git a/app/views/layouts/_page.html.haml b/app/views/layouts/_page.html.haml
index 54d02ee8e4b..a35a918d501 100644
--- a/app/views/layouts/_page.html.haml
+++ b/app/views/layouts/_page.html.haml
@@ -1,21 +1,4 @@
-.page-with-sidebar{ class: "#{page_sidebar_class} #{page_gutter_class}" }
-  .sidebar-wrapper.nicescroll
-    .sidebar-action-buttons
-      .nav-header-btn.toggle-nav-collapse{ title: "Open/Close" }
-        %span.sr-only Toggle navigation
-        = icon('bars')
-
-      %div{ class: "nav-header-btn pin-nav-btn has-tooltip #{'is-active' if pinned_nav?} js-nav-pin", title: pinned_nav? ? "Unpin navigation" : "Pin Navigation", data: { placement: 'right', container: 'body' } }
-        %span.sr-only Toggle navigation pinning
-        = icon('fw thumb-tack')
-
-    - if defined?(sidebar) && sidebar
-      = render "layouts/nav/#{sidebar}"
-    - elsif current_user
-      = render 'layouts/nav/dashboard'
-    - else
-      = render 'layouts/nav/explore'
-
+.page-with-sidebar{ class: page_gutter_class }
   - if defined?(nav) && nav
     .layout-nav
       .container-fluid
diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index 248d439cd05..19bd9b6d5c9 100644
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -1,7 +1,7 @@
 !!! 5
 %html{ lang: "en", class: "#{page_class}" }
   = render "layouts/head"
-  %body{ class: "#{user_application_theme}", data: { page: body_data_page, project: "#{@project.path if @project}", group: "#{@group.path if @group}" } }
+  %body{ data: { page: body_data_page, project: "#{@project.path if @project}", group: "#{@group.path if @group}" } }
     = Gon::Base.render_data
 
     = render "layouts/header/default", title: header_title
diff --git a/app/views/layouts/header/_default.html.haml b/app/views/layouts/header/_default.html.haml
index 59082ce5fd5..ddf50d6667f 100644
--- a/app/views/layouts/header/_default.html.haml
+++ b/app/views/layouts/header/_default.html.haml
@@ -2,9 +2,15 @@
   %a.sr-only.gl-accessibility{ href: "#content-body", tabindex: "1" } Skip to content
   .container-fluid
     .header-content
-      %button.side-nav-toggle{ type: 'button', "aria-label" => "Toggle global navigation" }
-        %span.sr-only Toggle navigation
-        = icon('bars')
+      .dropdown.global-dropdown
+        %button.global-dropdown-toggle{ type: 'button', 'data-toggle' => 'dropdown' }
+          %span.sr-only Toggle navigation
+          = icon('bars')
+        .dropdown-menu-nav.global-dropdown-menu
+          - if current_user
+            = render 'layouts/nav/dashboard'
+          - else
+            = render 'layouts/nav/explore'
       %button.navbar-toggle{ type: 'button' }
         %span.sr-only Toggle navigation
         = icon('ellipsis-v')
@@ -55,7 +61,6 @@
               %div
                 = link_to "Sign in", new_session_path(:user, redirect_to_referer: 'yes'), class: 'btn btn-sign-in btn-success'
 
-
       %h1.title= title
 
       .header-logo
diff --git a/app/views/layouts/nav/_dashboard.html.haml b/app/views/layouts/nav/_dashboard.html.haml
index 205d23178d2..bb611d39be5 100644
--- a/app/views/layouts/nav/_dashboard.html.haml
+++ b/app/views/layouts/nav/_dashboard.html.haml
@@ -1,41 +1,39 @@
-.nav-sidebar
-  %ul.nav
-    = nav_link(path: ['root#index', 'projects#trending', 'projects#starred', 'dashboard/projects#index'], html_options: {class: "#{project_tab_class} home"}) do
-      = link_to dashboard_projects_path, title: 'Projects', class: 'dashboard-shortcuts-projects' do
-        %span
-          Projects
-    = nav_link(path: 'dashboard#activity') do
-      = link_to activity_dashboard_path, class: 'dashboard-shortcuts-activity', title: 'Activity' do
-        %span
-          Activity
-    - if koding_enabled?
-      = nav_link(controller: :koding) do
-        = link_to koding_path, title: 'Koding' do
-          %span
-            Koding
-    = nav_link(controller: [:groups, 'groups/milestones', 'groups/group_members']) do
-      = link_to dashboard_groups_path, title: 'Groups' do
-        %span
-          Groups
-    = nav_link(controller: 'dashboard/milestones') do
-      = link_to dashboard_milestones_path, title: 'Milestones' do
-        %span
-          Milestones
-    = nav_link(path: 'dashboard#issues') do
-      = link_to assigned_issues_dashboard_path, title: 'Issues', class: 'dashboard-shortcuts-issues' do
-        %span
-          Issues
-          %span.count= number_with_delimiter(cached_assigned_issuables_count(current_user, :issues, :opened))
-    = nav_link(path: 'dashboard#merge_requests') do
-      = link_to assigned_mrs_dashboard_path, title: 'Merge Requests', class: 'dashboard-shortcuts-merge_requests' do
-        %span
-          Merge Requests
-          %span.count= number_with_delimiter(cached_assigned_issuables_count(current_user, :merge_requests, :opened))
-    = nav_link(controller: 'dashboard/snippets') do
-      = link_to dashboard_snippets_path, title: 'Snippets' do
+%ul
+  = nav_link(path: ['root#index', 'projects#trending', 'projects#starred', 'dashboard/projects#index'], html_options: {class: "#{project_tab_class} home"}) do
+    = link_to dashboard_projects_path, title: 'Projects', class: 'dashboard-shortcuts-projects' do
+      %span
+        Projects
+  = nav_link(path: 'dashboard#activity') do
+    = link_to activity_dashboard_path, class: 'dashboard-shortcuts-activity', title: 'Activity' do
+      %span
+        Activity
+  - if koding_enabled?
+    = nav_link(controller: :koding) do
+      = link_to koding_path, title: 'Koding' do
         %span
-          Snippets
-
-    = link_to help_path, title: 'About GitLab CE', class: 'about-gitlab' do
+          Koding
+  = nav_link(controller: [:groups, 'groups/milestones', 'groups/group_members']) do
+    = link_to dashboard_groups_path, title: 'Groups' do
+      %span
+        Groups
+  = nav_link(controller: 'dashboard/milestones') do
+    = link_to dashboard_milestones_path, title: 'Milestones' do
+      %span
+        Milestones
+  = nav_link(path: 'dashboard#issues') do
+    = link_to assigned_issues_dashboard_path, title: 'Issues', class: 'dashboard-shortcuts-issues' do
+      %span
+        Issues
+        %span.badge= number_with_delimiter(cached_assigned_issuables_count(current_user, :issues, :opened))
+  = nav_link(path: 'dashboard#merge_requests') do
+    = link_to assigned_mrs_dashboard_path, title: 'Merge Requests', class: 'dashboard-shortcuts-merge_requests' do
+      %span
+        Merge Requests
+        %span.badge= number_with_delimiter(cached_assigned_issuables_count(current_user, :merge_requests, :opened))
+  = nav_link(controller: 'dashboard/snippets') do
+    = link_to dashboard_snippets_path, title: 'Snippets' do
       %span
-        About GitLab CE
+        Snippets
+  %li.divider
+  %li
+    = link_to "About GitLab CE", help_path, title: 'About GitLab CE', class: 'about-gitlab'
diff --git a/app/views/layouts/nav/_explore.html.haml b/app/views/layouts/nav/_explore.html.haml
index e5bda7b3a6f..3a1fcd00e9c 100644
--- a/app/views/layouts/nav/_explore.html.haml
+++ b/app/views/layouts/nav/_explore.html.haml
@@ -1,4 +1,4 @@
-%ul.nav.nav-sidebar
+%ul
   = nav_link(path: ['dashboard#show', 'root#show', 'projects#trending', 'projects#starred', 'projects#index'], html_options: {class: 'home'}) do
     = link_to explore_root_path, title: 'Projects' do
       %span
diff --git a/app/views/profiles/preferences/show.html.haml b/app/views/profiles/preferences/show.html.haml
index feadd863b00..787339e0fe2 100644
--- a/app/views/profiles/preferences/show.html.haml
+++ b/app/views/profiles/preferences/show.html.haml
@@ -7,12 +7,6 @@
       Application theme
     %p
       This setting allows you to customize the appearance of the site, e.g. the sidebar.
-  .col-lg-9.application-theme
-    - Gitlab::Themes.each do |theme|
-      = label_tag do
-        .preview{ class: theme.css_class }
-        = f.radio_button :theme_id, theme.id
-        = theme.name
   .col-sm-12
     %hr
   .col-lg-3.profile-settings-sidebar
diff --git a/app/views/profiles/preferences/update.js.erb b/app/views/profiles/preferences/update.js.erb
index 8966dd3fd86..431ab9d052b 100644
--- a/app/views/profiles/preferences/update.js.erb
+++ b/app/views/profiles/preferences/update.js.erb
@@ -1,7 +1,3 @@
-// Remove body class for any previous theme, re-add current one
-$('body').removeClass('<%= Gitlab::Themes.body_classes %>')
-$('body').addClass('<%= user_application_theme %>')
-
 // Toggle container-fluid class
 if ('<%= current_user.layout %>' === 'fluid') {
   $('.content-wrapper .container-fluid').removeClass('container-limited')