feat(select): Add outlined variant

demos/select.html

@@ -131,6 +131,7 @@ <h2 class="mdc-typography--headline6">Fully-Featured JS Component</h2>
           </button>
         </div>
       </section>
+
       <section class="example">
         <h2 class="mdc-typography--headline6">Select box</h2>
         <section id="box-demo-wrapper">
@@ -178,6 +179,67 @@ <h2 class="mdc-typography--headline6">Select box</h2>
           </button>
         </div>
       </section>
+
+      <section class="example">
+        <h2 class="mdc-typography--headline6">Outlined Select</h2>
+        <section>
+          <div id="outline-js-select" class="mdc-select mdc-select--outlined">
+            <select class="mdc-select__native-control" id="outlined-select">
+              <option value="" disabled selected>
+              </option>
+              <option value="grains">
+                Bread, Cereal, Rice, and Pasta
+              </option>
+              <option value="vegetables" disabled>
+                Vegetables
+              </option>
+              <option value="fruit">
+                Fruit
+              </option>
+              <option value="dairy">
+                Milk, Yogurt, and Cheese
+              </option>
+              <option value="meat">
+                Meat, Poultry, Fish, Dry Beans, Eggs, and Nuts
+              </option>
+              <option value="fats">
+                Fats, Oils, and Sweets
+              </option>
+            </select>
+            <label class="mdc-floating-label" for="outlined-select">Food Group</label>
+             <div class="mdc-notched-outline">
+               <svg>
+                 <path class="mdc-notched-outline__path"></path>
+               </svg>
+             </div>
+             <div class="mdc-notched-outline__idle"></div>
+          </div>
+        </section>
+        <p>Currently selected: <span id="currently-selected-outline">(none)</span></p>
+        <div>
+          <input type="checkbox" id="rtl-outline">
+          <label for="rtl-outline">RTL</label>
+        </div>
+        <div>
+          <input type="checkbox" id="alternate-colors-outline">
+          <label for="alternate-colors-outline">Alternate Colors</label>
+        </div>
+        <div>
+          <input type="checkbox" id="disabled-outline">
+          <label for="disabled-outline">Disabled</label>
+        </div>
+        <div class="button-container">
+          <button class="mdc-button mdc-button--raised" id="set-selected-index-zero-button-outline">
+            Set Selected Index (0)
+          </button>
+        </div>
+        <div class="button-container">
+          <button class="mdc-button mdc-button--raised" id="set-value-meat-button-outline">
+            Set Value to Meat
+          </button>
+        </div>
+      </section>
+
       <section class="example">
         <h2 class="mdc-typography--headline6">Pre-selected option via HTML</h2>
         <section>
@@ -307,6 +369,49 @@ <h2 class="mdc-typography--headline6">MDC Select with optgroups</h2>
           updateSelectedTextContent();
         });
       });
+
+      demoReady(function() {
+
+        var root = document.getElementById('outline-js-select');
+        var currentlySelected = document.getElementById('currently-selected-outline');
+        var select = new mdc.select.MDCSelect(root);
+        var demoWrapper = root.parentElement;
+        var rtlCb = document.getElementById('rtl-outline');
+        var alternateColorsCb = document.getElementById('alternate-colors-outline');
+        var disabledCb = document.getElementById('disabled-outline');
+        var setSelectedButton = document.getElementById('set-selected-index-zero-button-outline');
+        var setValueMeatButton = document.getElementById('set-value-meat-button-outline');
+        function updateSelectedTextContent() {
+          var value = select.value;
+          var index = select.selectedIndex;
+          currentlySelected.textContent = value ? value + ' at index ' + index : '(none)';
+        }
+        root.addEventListener('change', function() {
+          updateSelectedTextContent();
+        });
+        rtlCb.addEventListener('change', function() {
+          if (rtlCb.checked) {
+            demoWrapper.setAttribute('dir', 'rtl');
+          } else {
+            demoWrapper.removeAttribute('dir');
+          }
+          select.layout();
+        });
+        alternateColorsCb.addEventListener('change', function() {
+          root.classList[alternateColorsCb.checked ? 'add' : 'remove']('demo-select-custom-colors');
+        });
+        disabledCb.addEventListener('change', function() {
+          select.disabled = disabledCb.checked;
+        });
+        setSelectedButton.addEventListener('click', function() {
+          select.selectedIndex = 0;
+          updateSelectedTextContent();
+        });
+        setValueMeatButton.addEventListener('click', function() {
+          select.value = 'meat';
+          updateSelectedTextContent();
+        });
+      });
     </script>
   </body>
 </html>

demos/select.scss

@@ -36,6 +36,12 @@
   @include mdc-select-container-fill-color(rgba(blue, .1));
 }
 
+.demo-select-custom-colors.mdc-select--outlined {
+  @include mdc-select-outline-color(rgba(blue, .6));
+  @include mdc-select-hover-outline-color(rgba(blue, .87));
+  @include mdc-select-focused-outline-color(green);
+}
+
 .button-container {
   margin: 8px 0;
 }

packages/mdc-select/_mixins.scss

@@ -17,6 +17,7 @@
 @import "@material/floating-label/mixins";
 @import "@material/theme/mixins";
 @import "@material/line-ripple/mixins";
+@import "@material/notched-outline/mixins";
 
 // Public
 
@@ -64,13 +65,38 @@
   }
 }
 
+@mixin mdc-select-outline-color($color) {
+  &:not(.mdc-select--disabled) {
+    @include mdc-select-outline-color_($color);
+  }
+}
+
+@mixin mdc-select-hover-outline-color($color) {
+  &:not(.mdc-select--disabled) {
+    @include mdc-select-hover-outline-color_($color);
+  }
+}
+
+@mixin mdc-select-focused-outline-color($color) {
+  &:not(.mdc-select--disabled) {
+    @include mdc-select-focused-outline-color_($color);
+  }
+}
+
 // Private
 @mixin mdc-select-focused-line-ripple_ {
   .mdc-select__native-control:focus ~ .mdc-line-ripple {
     @content;
   }
 }
 
+@mixin mdc-select-focused-outline_ {
+  .mdc-select__native-control:focus ~ .mdc-notched-outline {
+    @include mdc-notched-outline-stroke-width(2px);
+    @content;
+  }
+}
+
 @mixin mdc-select-ink-color_($color) {
   .mdc-select__native-control {
     @include mdc-theme-prop(color, $color);
@@ -100,3 +126,41 @@
 @mixin mdc-select-dd-arrow-svg-bg_($fill-hex-number: 000000, $opacity: .54) {
   background-image: url(data:image/svg+xml,%3Csvg%20width%3D%2210px%22%20height%3D%225px%22%20viewBox%3D%227%2010%2010%205%22%20version%3D%221.1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Axlink%3D%22http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%22%3E%0A%20%20%20%20%3Cpolygon%20id%3D%22Shape%22%20stroke%3D%22none%22%20fill%3D%22%23#{$fill-hex-number}%22%20fill-rule%3D%22evenodd%22%20opacity%3D%22#{$opacity}%22%20points%3D%227%2010%2012%2015%2017%2010%22%3E%3C%2Fpolygon%3E%0A%3C%2Fsvg%3E);
 }
+
+@mixin mdc-select-outline-corner-radius_($radius) {
+  // NOTE: idle and notched state border radius mixins
+  // are broken into 2 different mixins, otherwise
+  // we would be overly specific (big no, no). The cause of
+  // this is because .mdc-notched-outline and .mdc-notched-outline__idle
+  // are siblings. .mdc-notched-outline__idle needs to be a child of
+  // .mdc-notched-outline in order to remedy this issue.
+  .mdc-notched-outline {
+    @include mdc-notched-outline-corner-radius($radius);
+  }
+
+  @include mdc-notched-outline-idle-corner-radius($radius);
+}
+
+@mixin mdc-select-outline-color_($color) {
+  // NOTE: outlined version of select wants the "idle" and
+  // "notched" outline to have the same color. This covers two cases:
+  // 1) text field renders with NO value in the "idle" state
+  // 2) text field renders with a value in the "notched" state
+  @include mdc-notched-outline-idle-color($color);
+  @include mdc-notched-outline-color($color);
+}
+
+@mixin mdc-select-hover-outline-color_($color) {
+  &:not(.mdc-select__native-control:focus) .mdc-select__native-control:hover ~ {
+    @include mdc-notched-outline-idle-color($color);
+    .mdc-notched-outline {
+      @include mdc-notched-outline-color($color);
+    }
+  }
+}
+
+@mixin mdc-select-focused-outline-color_($color) {
+  @include mdc-select-focused-outline_ {
+    @include mdc-notched-outline-color($color);
+  }
+}

packages/mdc-select/_variables.scss

@@ -18,6 +18,7 @@
 
 $mdc-select-arrow-padding: 26px;
 $mdc-select-label-padding: 16px;
+$mdc-select-border-radius: 4px !default;
 
 $mdc-select-ink-color: rgba(mdc-theme-prop-value(on-surface), .87);
 $mdc-select-disabled-ink-color: rgba(mdc-theme-prop-value(on-surface), .37);
@@ -32,3 +33,12 @@ $mdc-select-bottom-line-hover-color: rgba(mdc-theme-prop-value(on-surface), .87)
 
 $mdc-select-box-fill-color: mix(mdc-theme-prop-value(on-surface), mdc-theme-prop-value(surface), 4%);
 $mdc-select-box-disabled-fill-color: mix(mdc-theme-prop-value(on-surface), mdc-theme-prop-value(surface), 2%);
+
+$mdc-select-outlined-idle-border: rgba(mdc-theme-prop-value(on-surface), .24);
+
+// should be .06 after mdc-select opacity is applied
+$mdc-select-outlined-disabled-border: rgba(mdc-theme-prop-value(on-surface), .16);
+$mdc-select-outlined-hover-border: rgba(mdc-theme-prop-value(on-surface), .87);
+
+$mdc-select-outlined-label-position-y: 130%;
+$mdc-select-outlined-dense-label-position-y: 110%;

packages/mdc-select/constants.js

@@ -13,15 +13,24 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-export const cssClasses = {
+const cssClasses = {
   BOX: 'mdc-select--box',
   DISABLED: 'mdc-select--disabled',
   ROOT: 'mdc-select',
+  OUTLINED: 'mdc-select--outlined',
 };
 
-export const strings = {
+const strings = {
   CHANGE_EVENT: 'MDCSelect:change',
   LINE_RIPPLE_SELECTOR: '.mdc-line-ripple',
   LABEL_SELECTOR: '.mdc-floating-label',
   NATIVE_CONTROL_SELECTOR: '.mdc-select__native-control',
+  OUTLINE_SELECTOR: '.mdc-notched-outline',
 };
+
+/** @enum {number} */
+const numbers = {
+  LABEL_SCALE: 0.75,
+};
+
+export {cssClasses, strings, numbers};

packages/mdc-select/foundation.js

@@ -15,13 +15,17 @@
  */
 
 import {MDCFoundation} from '@material/base/index';
-import {cssClasses, strings} from './constants';
+import {cssClasses, strings, numbers} from './constants';
 
 export default class MDCSelectFoundation extends MDCFoundation {
   static get cssClasses() {
     return cssClasses;
   }
 
+  static get numbers() {
+    return numbers;
+  }
+
   static get strings() {
     return strings;
   }
@@ -30,6 +34,7 @@ export default class MDCSelectFoundation extends MDCFoundation {
     return {
       addClass: (/* className: string */) => {},
       removeClass: (/* className: string */) => {},
+      hasClass: (/* className: string */) => false,
       floatLabel: (/* value: boolean */) => {},
       activateBottomLine: () => {},
       deactivateBottomLine: () => {},
@@ -40,6 +45,12 @@ export default class MDCSelectFoundation extends MDCFoundation {
       setDisabled: (/* disabled: boolean */) => {},
       getValue: () => /* string */ '',
       setValue: (/* value: string */) => {},
+      isRtl: () => false,
+      hasLabel: () => {},
+      getLabelWidth: () => {},
+      hasOutline: () => {},
+      notchOutline: () => {},
+      closeOutline: () => {},
     };
   }
 
@@ -86,10 +97,12 @@ export default class MDCSelectFoundation extends MDCFoundation {
   floatLabelWithValue_() {
     const optionHasValue = this.adapter_.getValue().length > 0;
     this.adapter_.floatLabel(optionHasValue);
+    this.notchOutline(optionHasValue);
   }
 
   handleFocus_() {
     this.adapter_.floatLabel(true);
+    this.notchOutline(true);
     this.adapter_.activateBottomLine();
   }
 
@@ -101,4 +114,23 @@ export default class MDCSelectFoundation extends MDCFoundation {
   handleSelect_() {
     this.setSelectedIndex(this.adapter_.getSelectedIndex());
   }
+
+  /**
+   * Opens/closes the notched outline.
+   * @param {boolean} openNotch
+   */
+  notchOutline(openNotch) {
+    if (!this.adapter_.hasOutline() || !this.adapter_.hasLabel()) {
+      return;
+    }
+
+    if (openNotch) {
+      const labelScale = numbers.LABEL_SCALE;
+      const labelWidth = this.adapter_.getLabelWidth() * labelScale;
+      const isRtl = this.adapter_.isRtl();
+      this.adapter_.notchOutline(labelWidth, isRtl);
+    } else {
+      this.adapter_.closeOutline();
+    }
+  }
 }