ui: PagedCollection component (#12404)

* ui: PagedCollection component

* ui: Use PagedCollection (#12436)

* ui: Integrate PagedCollection into DisclosureMenu

* Integrate PageCollection into DC, Nspace and Partition menus

ui/packages/consul-nspaces/app/components/consul/nspace/selector/index.hbs

@@ -2,18 +2,26 @@
   {{#if (can "choose nspaces")}}
     {{#let
       (or @nspace 'default')
-    as |nspace|}}
+      (is-href 'dc.nspaces' @dc.Name)
+    as |nspace isManaging|}}
         <li
           class="nspaces"
           data-test-nspace-menu
         >
           <DisclosureMenu
             aria-label="Namespace"
+            @items={{append 
+              (hash 
+                Name="Manage Namespaces"
+                href=(href-to 'dc.nspaces' @dc.Name)
+              ) 
+              (reject-by 'DeletedAt' @nspaces)
+            }}
           as |disclosure|>
             <disclosure.Action
               {{on 'click' disclosure.toggle}}
             >
-              {{nspace}}
+              {{if isManaging 'Manage Namespaces' nspace}}
             </disclosure.Action>
             <disclosure.Menu as |panel|>
               {{#if (gt @nspaces.length 0)}}
@@ -40,34 +48,39 @@
                 />
               {{/if}}
               <panel.Menu as |menu|>
-                {{#each (reject-by 'DeletedAt' @nspaces) as |item|}}
+                {{#each menu.items as |item|}}
+
                   <menu.Item
-                    aria-current={{if (eq nspace item.Name) 'true'}}
+                    data-test-main-nav-nspaces={{not-eq item.href undefined}}
+                    aria-current={{if 
+                      (or 
+                        (and isManaging item.href)
+                        (and (not isManaging) (eq nspace item.Name))
+                      )
+                      'true'
+                    }}
                   >
                     <menu.Action
                       {{on 'click' disclosure.close}}
-                      @href={{href-to '.' params=(hash
+                      @href={{if item.href 
-                        partition=(if (gt @partition.length 0) @partition undefined)
+                        item.href 
-                        nspace=item.Name
+                        (if isManaging 
-                      )}}
+                          (href-to 'dc.services.index' params=(hash
+                            partition=(if (gt @partition.length 0) @partition undefined)
+                            nspace=item.Name
+                            dc=@dc.Name
+                          ))
+                          (href-to '.' params=(hash
+                            partition=(if (gt @partition.length 0) @partition undefined)
+                            nspace=item.Name
+                          ))
+                        )
+                      }}
                     >
                       {{item.Name}}
                     </menu.Action>
                   </menu.Item>
                 {{/each}}
-                {{#if (can 'manage nspaces')}}
-                  <menu.Separator />
-                  <menu.Item
-                    data-test-main-nav-nspaces
-                  >
-                    <menu.Action
-                      {{on 'click' disclosure.close}}
-                      @href={{href-to 'dc.nspaces' @dc.Name}}
-                    >
-                      Manage Namespaces
-                    </menu.Action>
-                  </menu.Item>
-                {{/if}}
               </panel.Menu>
             </disclosure.Menu>
           </DisclosureMenu>

ui/packages/consul-partitions/app/components/consul/partition/selector/index.hbs

@@ -1,6 +1,7 @@
 {{#let
   (or @partition 'default')
-as |partition|}}
+  (is-href 'dc.partitions' @dc.Name)
+as |partition isManaging|}}
   {{#if (can "choose partitions" dc=@dc)}}
       <li
         class="partitions"
@@ -8,11 +9,18 @@ as |partition|}}
       >
         <DisclosureMenu
           aria-label="Admin Partition"
+          @items={{append 
+            (hash 
+              Name="Manage Partitions"
+              href=(href-to 'dc.partitions' @dc.Name)
+            ) 
+            (reject-by 'DeletedAt' @partitions)
+          }}
         as |disclosure|>
           <disclosure.Action
             {{on 'click' disclosure.toggle}}
           >
-            {{partition}}
+            {{if isManaging 'Manage Partition' partition}}
           </disclosure.Action>
           <disclosure.Menu as |panel|>
             <DataSource
@@ -25,34 +33,37 @@ as |partition|}}
               @onchange={{fn (optional @onchange)}}
             />
             <panel.Menu as |menu|>
-              {{#each (reject-by 'DeletedAt' @partitions) as |item|}}
+              {{#each menu.items as |item|}}
                 <menu.Item
-                  class={{if (eq partition item.Name) 'is-active'}}
+                  aria-current={{if 
+                    (or 
+                      (and isManaging item.href)
+                      (and (not isManaging) (eq partition item.Name))
+                    )
+                    'true'
+                  }}
                 >
                   <menu.Action
                     {{on 'click' disclosure.close}}
-                    @href={{href-to '.' params=(hash
+                    @href={{if item.href 
-                      partition=item.Name
+                      item.href 
-                      nspace=undefined
+                      (if isManaging 
-                    )}}
+                        (href-to 'dc.services.index' params=(hash
+                          partition=item.Name
+                          nspace=undefined
+                          dc=@dc.Name
+                        ))
+                        (href-to '.' params=(hash
+                          partition=item.Name
+                          nspace=undefined
+                        ))
+                      )
+                    }}
                   >
                     {{item.Name}}
                   </menu.Action>
                 </menu.Item>
               {{/each}}
-              {{#if (can 'manage partitions')}}
-                <menu.Separator />
-                <menu.Item
-                  data-test-main-nav-partitions
-                >
-                  <menu.Action
-                    {{on 'click' disclosure.close}}
-                    @href={{href-to 'dc.partitions.index' @dc.Name}}
-                  >
-                    Manage Partitions
-                  </menu.Action>
-                </menu.Item>
-              {{/if}}
             </panel.Menu>
           </disclosure.Menu>
         </DisclosureMenu>

ui/packages/consul-ui/app/components/consul/datacenter/selector/index.hbs

@@ -4,6 +4,7 @@
 >
   <DisclosureMenu
     aria-label="Datacenter"
+    @items={{sort-by 'Name' @dcs}}
   as |disclosure|>
     <disclosure.Action
       {{on 'click' disclosure.toggle}}
@@ -16,7 +17,7 @@
         @onchange={{action (mut @dcs) value="data"}}
       />
         <panel.Menu as |menu|>
-          {{#each (sort-by 'Name' @dcs) as |item|}}
+          {{#each menu.items as |item|}}
             <menu.Item
               aria-current={{if (eq @dc.Name item.Name) 'true'}}
               class={{class-map

ui/packages/consul-ui/app/components/disclosure-menu/README.mdx

@@ -38,14 +38,12 @@ common usecase of having a floating menu.
   <DisclosureMenu as |disclosure|>
     <disclosure.Action
       {{on 'click' disclosure.toggle}}
-      {{css-prop 'height' returns=(set this 'height')}}
     >
       {{if disclosure.expanded 'Close' 'Open'}}
     </disclosure.Action>
     <disclosure.Menu
       style={{style-map
         (array 'position' 'absolute')
-        (array 'top' this.height)
         (array 'background-color' 'rgb(var(--tone-gray-000))')
       }}
     as |panel|>
@@ -62,11 +60,53 @@ common usecase of having a floating menu.
 </figure>
 ```
 
+`DisclosureMenu` also supports virtually scrolling its menu items for when you have 1000s of items to display in the menu whilst avoiding DOM stuttering. The set up is a tinsy bit more involved. but eesnetially you provide the data items for the menu using the `@items` argument, and then you can loop through these in the menu to make/use your menu items. The `menu.items` property is automatically paged for you depending on the scroll position of the menu panel. Importantly, right now, you should provide a height value for each menu.item using the `--paged-row-height` CSS property, you can do this inline or within your CSS (preferred). If you don't do this the component is unable to calculate the size of the scroll track/thumb. In the future (when needed) we will provide a callback for each item so you can specify a function to calculate the size of each individual item to give us a little more flexibility on what we can do with this component.
+
+```hbs preview-template
+<DataSource
+  @src={{uri
+  '/${partition}/${nspace}/${dc}/nodes'
+    (hash
+      nspace=''
+      partition=''
+      dc='dc-1'
+    )
+  }}
+as |source|>
+  <DisclosureMenu
+    @items={{source.data}}
+  as |disclosure|>
+    <disclosure.Action
+      {{on 'click' disclosure.toggle}}
+    >
+      {{if disclosure.expanded 'Close' 'Open'}}
+    </disclosure.Action>
+    <disclosure.Menu
+      style={{style-map
+        (array 'position' 'absolute')
+        (array 'max-height' '360' 'px')
+        (array 'width' '560' 'px')
+        (array '--paged-row-height' '42px')
+      }}
+    as |panel|>
+      <panel.Menu as |menu|>
+        {{#each menu.items as |item|}}
+          <menu.Item>
+            <menu.Action>{{item.Node}}</menu.Action>
+          </menu.Item>
+        {{/each}}
+      </panel.Menu>
+    </disclosure.Menu>
+  </DisclosureMenu>
+</DataSource>
+```
+
 ## Arguments
 
 | Argument | Type | Default | Description |
 | --- | --- | --- | --- |
 | `expanded` | `Boolean` | false | The _initial_ state of the disclosure. Please note: this is the _initial_ state only, please use the `disclosure.open` and `disclosure.close` for controling the state. |
+| `items` | `object[]` |  | When using a paginated menu you should add all possible items to this arguments and then uses the disclosure.Panel.Menu.items property for `each`ing through, see above example |
 
 ## Exported API
 

ui/packages/consul-ui/app/components/disclosure-menu/index.hbs

@@ -9,7 +9,11 @@
   as |disclosure|>
     {{yield (hash
       Action=(component 'disclosure-menu/action' disclosure=disclosure)
-      Menu=(component 'disclosure-menu/menu' disclosure=disclosure)
+      Menu=(component 'disclosure-menu/menu'
+        disclosure=disclosure
+        items=@items
+        rowHeight=@rowHeight
+      )
       disclosure=disclosure
       toggle=disclosure.toggle
       close=disclosure.close

ui/packages/consul-ui/app/components/disclosure-menu/index.scss

@@ -3,4 +3,6 @@
 }
 .disclosure-menu [aria-expanded] ~ * {
   @extend %menu-panel;
+  overflow-y: auto !important;
+  will-change: scrollPosition;
 }

ui/packages/consul-ui/app/components/disclosure-menu/menu/index.hbs

@@ -1,11 +1,25 @@
 <@disclosure.Details as |details|>
-<div
+  <PagedCollection
-  {{on-outside 'click' @disclosure.close}}
+    @items={{or @items (array)}}
-  ...attributes
+  as |pager|>
->
+    <div
-  {{yield (hash
+      {{on-outside 'click' @disclosure.close}}
-    Menu=(component 'menu' disclosure=@disclosure)
+      {{did-insert pager.viewport}}
-  )}}
+      {{on-resize pager.resize}}
-</div>
+      {{css-prop '--paged-row-height' returns=pager.rowHeight}}
+      {{css-prop 'max-height' returns=pager.maxHeight}}
+      class={{class-map
+        (array 'paged-collection-scroll' (contains pager.type (array 'virtual-scroll' 'native-scroll')))
+      }}
+      ...attributes
+    >
+      {{yield (hash
+        Menu=(component 'menu'
+          disclosure=@disclosure
+          pager=pager
+        )
+      )}}
+    </div>
+  </PagedCollection>
 </@disclosure.Details>
 

ui/packages/consul-ui/app/components/hashicorp-consul/index.scss

@@ -3,14 +3,21 @@
     @extend %main-nav-vertical-hoisted;
     left: 100px;
   }
-  nav .dcs .menu-panel {
-    min-width: 250px;
-  }
   nav li.partitions,
   nav li.nspaces {
     @extend %main-nav-vertical-popover-menu;
-    /*    --panel-height: 300px;
+  }
-    --row-height: 43px; */
+  nav li.dcs [aria-expanded] ~ * {
+    min-width: 250px;
+  }
+  nav li.dcs [aria-expanded] ~ * {
+    max-height: 560px;
+    --paged-row-height: 43px;
+  }
+  nav li.partitions [aria-expanded] ~ *,
+  nav li.nspaces [aria-expanded] ~ * {
+    max-height: 360px;
+    --paged-row-height: 43px;
   }
 
   [role='banner'] a svg {

ui/packages/consul-ui/app/components/menu/index.hbs

@@ -1,8 +1,10 @@
 <ul
   role="menu"
-  aria-labelledby={{@disclosure.button}}
+  style={{{style-map
-  id={{@disclosure.panel}}
+    (array 'height' (if (and @pager (not-eq @pager.type 'native-scroll')) @pager.totalHeight) 'px')
-  ...attributes
+    (array '--paged-start' (if (and @pager (not-eq @pager.type 'native-scroll')) @pager.startHeight) 'px')
+  }}}
+  {{did-insert (optional @pager.pane)}}
   {{aria-menu
     onclose=(or @onclose @disclosure.close)
     openEvent=(or @event @disclosure.event)
@@ -12,5 +14,6 @@
     Action=(component 'menu/action' disclosure=@disclosure)
     Item=(component 'menu/item')
     Separator=(component 'menu/separator')
+    items=@pager.items
   )}}
 </ul>

ui/packages/consul-ui/app/components/paged-collection/README.mdx

@@ -0,0 +1,109 @@
+# PagedCollection
+
+A renderless component to act as a helper for different types of pagination.
+
+```hbs preview-template
+<figure>
+  <figcaption>
+    Provide a widget so we can try switching between two pagination methods
+  </figcaption>
+  <select
+    onchange={{action (mut this.type) value="target.value"}}
+  >
+    <option>virtual-scroll</option>
+    <option>index</option>
+  </select>
+</figure>
+
+<figure>
+  <figcaption>Get some data and page it</figcaption>
+  <DataSource
+    @src={{uri "/partition/default/dc-1/nodes"}}
+  as |source|>
+    <PagedCollection
+      @type={{or this.type "virtual-scroll"}}
+      @items={{or source.data (array)}}
+      @perPage={{8}}
+      @page={{or this.page 1}}
+      @rowHeight="43"
+    as |pager|>
+      <div
+        style={{{style-map
+          (array 'outline' '1px solid rgb(var(--tone-gray-300))')
+          (array 'max-height' '360' 'px')
+          (array '--paged-row-height' (if (not-eq this.type 'index') '43px'))
+        }}}
+        {{did-insert pager.viewport}}
+        {{on-resize pager.resize}}
+      >
+        <ul
+          style={{{style-map
+            (array 'height' pager.totalHeight 'px')
+            (array '--paged-start' pager.startHeight 'px')
+          }}}
+        >
+        {{#each pager.items as |item|}}
+          <li
+            style={{{style-map
+              (array 'height' '43' 'px')
+              (array 'outline' '1px solid rgb(var(--tone-gray-100))')
+            }}}
+          >
+            {{item.Node}}
+          </li>
+        {{/each}}
+        </ul>
+      </div>
+      <pager.Pager>
+        <div
+          style={{{style-map
+            (array 'display' 'flex')
+            (array 'flex-direction' (if (not-eq pager.page pager.totalPages) 'row-reverse'))
+            (array 'justify-content' 'space-between')
+          }}}
+        >
+        {{#if (not-eq pager.page pager.totalPages)}}
+        <Action
+          {{on 'click' (set this 'page' (add pager.page 1))}}
+        >
+          Next
+        </Action>
+        {{/if}}
+        {{#if (not-eq pager.page 1)}}
+          <Action
+            {{on 'click' (set this 'page' (sub pager.page 1))}}
+          >
+            Prev
+          </Action>
+        {{/if}}
+        </div>
+      </pager.Pager>
+    </PagedCollection>
+  </DataSource>
+</figure>
+```
+
+## Arguments
+
+| Argument | Type | Default | Description |
+| --- | --- | --- | --- |
+| `type` | `(native-scroll \| virtual-scroll \| index)` | `native-scroll` | The type of pagination |
+| `items` | `array` | `undefined` | An array or items to be paginated |
+| `rowHeight` | `(string \| number)` | `undefined` | When `@type=virtual-scroll` this informs the scroller of the size of each row in the scroll pane. For the moment this _must_ be the same for every row. |
+| `page` | `number` | `undefined` | When `@type=index` this is the current page number to show |
+| `perPage` | `number` | `undefined` | When `@type=index` this is the amount of rows to show per page |
+
+## Exported API
+
+| Name | Type | Description |
+| --- | --- | --- |
+| `items` | `array` | An array of the items to be shown on the current page |
+| `page` | `number` | The current page number (a mirror of @page) |
+| `resize` | `Function` | Function to be called on the resize of the viewport |
+| `viewport` | `Function` | Function to be called on the `did-insert` of the viewport to be used for scrolling |
+| `rowHeight` | `Function` | Function to be called to set the rowHeight of the virtual-scroller |
+| `startHeight` | `number` | Size of the area before the panel to be virtually-scroller, usually you should use this to set `--paged-start` wrapping element of the scrollable items |
+| `totalHeight` | `number` | Size of the of the entire panel in order to show the correctly sized scroll thumb |
+| `totalPages` | `number` | Totol number of pages |
+
+

ui/packages/consul-ui/app/components/paged-collection/index.hbs

@@ -0,0 +1,15 @@
+{{yield (hash
+  items=this.items
+  page=@page
+  pane=(fn this.setPane)
+  resize=(fn this.resize)
+  viewport=(fn this.setViewport)
+  rowHeight=(fn this.setRowHeight)
+  maxHeight=(fn this.setMaxHeight)
+  startHeight=this.startHeight
+  totalHeight=this.totalHeight
+  totalPages=this.totalPages
+  Pager=(if (eq type "index") (component 'yield') '')
+)}}
+
+{{will-destroy this.disconnect}}

ui/packages/consul-ui/app/components/paged-collection/index.js

@@ -0,0 +1,125 @@
+import Component from '@glimmer/component';
+import { action } from '@ember/object';
+import { tracked } from '@glimmer/tracking';
+
+export default class PagedCollectionComponent extends Component {
+
+  @tracked $pane;
+  @tracked $viewport;
+
+  @tracked top = 0;
+  @tracked visibleItems = 0;
+  @tracked overflow = 10;
+  @tracked _rowHeight = 0;
+
+  @tracked _type = 'native-scroll';
+
+  get type() {
+    return this.args.type || this._type;
+  }
+
+  get items() {
+    return this.args.items.slice(this.cursor, this.cursor + this.perPage);
+  }
+
+  get perPage() {
+    switch (this.type) {
+      case 'virtual-scroll':
+        return this.visibleItems + (this.overflow * 2);
+      case 'index':
+        return parseInt(this.args.perPage);
+    }
+    // 'native-scroll':
+    return this.total;
+  }
+
+  get cursor() {
+    switch (this.type) {
+      case 'virtual-scroll':
+        return this.itemsBefore;
+      case 'index':
+        return (parseInt(this.args.page) - 1) * this.perPage;
+    }
+    // 'native-scroll':
+    return 0;
+  }
+
+  get itemsBefore() {
+    if(typeof this.$viewport === 'undefined') {
+      return 0;
+    }
+    return Math.max(0, Math.round(this.top / this.rowHeight) - this.overflow);
+  }
+
+  get rowHeight() {
+    return parseFloat(this.args.rowHeight || this._rowHeight);
+  }
+
+  get startHeight() {
+    switch (this.type) {
+      case 'virtual-scroll':
+        return Math.min(this.totalHeight, this.itemsBefore * this.rowHeight);
+      case 'index':
+        return 0;
+    }
+    // 'native-scroll':
+    return 0;
+  }
+
+  get totalHeight() {
+    return this.total * this.rowHeight;
+  }
+  get totalPages() {
+    return Math.ceil(this.total / this.perPage);
+  }
+
+  get total() {
+    return this.args.items.length;
+  }
+
+  @action
+  scroll(e) {
+    this.top = this.$viewport.scrollTop;
+  }
+
+  @action
+  resize() {
+    if(this.$viewport.clientHeight > 0 && this.rowHeight > 0) {
+      this.visibleItems = Math.ceil(this.$viewport.clientHeight / this.rowHeight);
+    } else {
+      this.visibleItems = 0;
+    }
+  }
+
+  @action
+  setViewport($viewport) {
+    this.$viewport = $viewport === 'html' ? [...document.getElementsByTagName('html')][0] : $viewport;
+    this.$viewport.addEventListener('scroll', this.scroll);
+    if($viewport === 'html') {
+      this.$viewport.addEventListener('resize', this.resize);
+    }
+    this.scroll();
+    this.resize();
+  }
+
+  @action setPane($pane) {
+    this.$pane = $pane;
+  }
+
+  @action setRowHeight(str) {
+    this._rowHeight = parseFloat(str);
+  }
+
+  @action setMaxHeight(str) {
+    const maxHeight = parseFloat(str);
+    if(!isNaN(maxHeight)) {
+      this._type = 'virtual-scroll';
+    }
+  }
+
+  @action
+  disconnect() {
+    this.$viewport.removeEventListener('scroll', this.scroll);
+    this.$viewport.removeEventListener('resize', this.resize);
+  }
+}

ui/packages/consul-ui/app/components/paged-collection/index.scss

@@ -0,0 +1,16 @@
+%paged-collection-scroll {
+  overflow-y: auto !important;
+  will-change: scrollPosition;
+}
+.paged-collection-scroll {
+  @extend %paged-collection-scroll;
+}
+[style*="--paged-row-height"] {
+  @extend %paged-collection-scroll;
+}
+[style*="--paged-start"]::before {
+  content: '';
+  display: block;
+  height: var(--paged-start);
+}
+

ui/packages/consul-ui/app/components/yield/index.hbs

@@ -0,0 +1 @@
+{{yield}}

ui/packages/consul-ui/app/styles/components.scss

@@ -27,6 +27,7 @@
 @import 'consul-ui/components/oidc-select';
 @import 'consul-ui/components/radio-card';
 @import 'consul-ui/components/panel';
+@import 'consul-ui/components/paged-collection';
 @import 'consul-ui/components/pill';
 @import 'consul-ui/components/popover-menu';
 @import 'consul-ui/components/popover-select';