feat(select): Add search support to the material2 select

Author: Eernie

src/demo-app/select/select-demo.html

@@ -33,6 +33,26 @@
     <button md-button (click)="drinkControl.reset()">RESET</button>
   </md-card>
 
+  <div>
+    <md-card>
+      <md-card-subtitle>Filter selection</md-card-subtitle>
+
+      <md-card-content>
+        <md-select placeholder="Bond movies" [search]="true" [required]="movieRequired" [disabled]="moviesDisabled" [(ngModel)]="currentMovie" #movieControl="ngModel">
+          <md-option *ngFor="let movie of movies" [value]="movie.value">{{ movie.viewValue }}</md-option>
+        </md-select>
+        <p> Value: {{ currentMovie }} </p>
+        <p> Touched: {{ movieControl.touched }} </p>
+        <p> Dirty: {{ movieControl.dirty }} </p>
+        <p> Status: {{ movieControl.control?.status }} </p>
+        <button md-button (click)="currentMovie='moonraker-0'">SET VALUE</button>
+        <button md-button (click)="movieRequired=!movieRequired">TOGGLE REQUIRED</button>
+        <button md-button (click)="moviesDisabled=!moviesDisabled">TOGGLE DISABLED</button>
+        <button md-button (click)="movieControl.reset()">RESET</button>
+      </md-card-content>
+    </md-card>
+  </div>
+
   <div *ngIf="showSelect">
     <md-card>
       <md-select placeholder="Starter Pokemon" (change)="latestChangeEvent = $event">

src/demo-app/select/select-demo.ts

@@ -10,9 +10,12 @@ import {MdSelectChange} from '@angular/material';
 })
 export class SelectDemo {
   isRequired = false;
+  movieRequired = false;
   isDisabled = false;
+  moviesDisabled = false;
   showSelect = false;
   currentDrink: string;
+  currentMovie: string;
   latestChangeEvent: MdSelectChange;
   foodControl = new FormControl('pizza-1');
 
@@ -40,6 +43,17 @@ export class SelectDemo {
     {value: 'squirtle-2', viewValue: 'Squirtle'}
   ];
 
+  movies = [
+    {value: 'moonraker-0', viewValue: 'Moonraker'},
+    {value: 'goldfinger-1', viewValue: 'Sprite'},
+    {value: 'thunderball-2', viewValue: 'Water'},
+    {value: 'dr-no-3', viewValue: 'Dr. No'},
+    {value: 'octopussy-4', viewValue: 'Octopussy'},
+    {value: 'goldeneye-5', viewValue: 'Goldeneye'},
+    {value: 'skyfall-6', viewValue: 'Skyfall'},
+    {value: 'spectre-7', viewValue: 'Spectre'}
+  ];
+
   toggleDisabled() {
     this.foodControl.enabled ? this.foodControl.disable() : this.foodControl.enable();
   }

src/lib/select/index.ts

@@ -6,12 +6,14 @@ import {
   CompatibilityModule,
   OverlayModule,
 } from '../core';
+import {MdInputModule} from '../input/input';
+import {FormsModule} from '@angular/forms';
 export * from './select';
 export {fadeInContent, transformPanel, transformPlaceholder} from './select-animations';
 
 
 @NgModule({
-  imports: [CommonModule, OverlayModule, MdOptionModule, CompatibilityModule],
+  imports: [CommonModule, OverlayModule, MdOptionModule, CompatibilityModule, MdInputModule, FormsModule],
   exports: [MdSelect, MdOptionModule, CompatibilityModule],
   declarations: [MdSelect],
 })

src/lib/select/select.html

@@ -6,12 +6,13 @@
 </div>
 
 <template cdk-connected-overlay [origin]="origin" [open]="panelOpen" hasBackdrop (backdropClick)="close()"
-  backdropClass="cdk-overlay-transparent-backdrop" [positions]="_positions" [minWidth]="_triggerWidth"
-  [offsetY]="_offsetY" [offsetX]="_offsetX" (attach)="_setScrollTop()">
+          backdropClass="cdk-overlay-transparent-backdrop" [positions]="_positions" [minWidth]="_triggerWidth"
+          [offsetY]="_offsetY" [offsetX]="_offsetX" (attach)="_setScrollTop()">
   <div class="md-select-panel" [@transformPanel]="'showing'" (@transformPanel.done)="_onPanelDone()"
-    (keydown)="_keyManager.onKeydown($event)" [style.transformOrigin]="_transformOrigin"
-      [class.md-select-panel-done-animating]="_panelDoneAnimating">
+       (keydown)="_keyManager.onKeydown($event)" [style.transformOrigin]="_transformOrigin"
+       [class.md-select-panel-done-animating]="_panelDoneAnimating">
     <div class="md-select-content" [@fadeInContent]="'showing'" (@fadeInContent.done)="_onFadeInDone()">
+      <md-input *ngIf="_search" type="text" [ngModel]="filter" (ngModelChange)="_onSearch($event)" [autocomplete]="false"></md-input>
       <ng-content></ng-content>
     </div>
   </div>

src/lib/select/select.scss

@@ -108,3 +108,19 @@ md-select {
   }
 }
 
+.md-select-content md-input {
+  @include md-menu-item-base();
+  height: auto;
+
+  .md-input-wrapper {
+    width: 100%;
+  }
+
+  .md-input-underline {
+    width: calc(100% - #{$md-menu-side-padding*2})
+  }
+}
+
+md-option[hidden] {
+  display: none;
+}

src/lib/select/select.spec.ts

@@ -10,6 +10,7 @@ import {
   ControlValueAccessor, FormControl, FormsModule, NG_VALUE_ACCESSOR, ReactiveFormsModule
 } from '@angular/forms';
 import {ViewportRuler} from '../core/overlay/position/viewport-ruler';
+import {MdInput} from '../input/input';
 
 describe('MdSelect', () => {
   let overlayContainerElement: HTMLElement;
@@ -20,6 +21,7 @@ describe('MdSelect', () => {
       imports: [MdSelectModule.forRoot(), ReactiveFormsModule, FormsModule],
       declarations: [
         BasicSelect,
+        SearchSelect,
         NgModelSelect,
         ManySelects,
         NgIfSelect,
@@ -1255,6 +1257,56 @@ describe('MdSelect', () => {
       expect(fixture.componentInstance.changeListener).toHaveBeenCalledTimes(1);
     });
   });
+
+  describe('Search input', () => {
+    let fixture: ComponentFixture<SearchSelect>;
+
+    beforeEach(() => {
+      fixture = TestBed.createComponent(SearchSelect);
+      fixture.detectChanges();
+
+      let trigger = fixture.debugElement.query(By.css('.md-select-trigger')).nativeElement;
+      trigger.click();
+      fixture.detectChanges();
+    });
+
+    it('should hide elements that are not in the filter', () => {
+      fixture.componentInstance.select._onSearch('steak');
+      fixture.detectChanges();
+
+      fixture.whenStable().then(() =>
+      {
+        let options = overlayContainerElement.querySelectorAll('md-option') as NodeListOf<HTMLElement>;
+
+        expect(options[0].getAttribute('hidden')).toEqual(null);
+        expect(options[1].getAttribute('hidden')).toEqual('true');
+        expect(options[2].getAttribute('hidden')).toEqual('true');
+        expect(options[3].getAttribute('hidden')).toEqual('true');
+        expect(options[4].getAttribute('hidden')).toEqual('true');
+        expect(options[5].getAttribute('hidden')).toEqual('true');
+        expect(options[6].getAttribute('hidden')).toEqual('true');
+        expect(options[7].getAttribute('hidden')).toEqual('true');
+      });
+    });
+
+    it('should should not be case sensitive', () => {
+      fixture.componentInstance.select._onSearch('S-');
+      fixture.detectChanges();
+
+      fixture.whenStable().then(() => {
+        let options = overlayContainerElement.querySelectorAll('md-option') as NodeListOf<HTMLElement>;
+
+        expect(options[0].getAttribute('hidden')).toEqual('true');
+        expect(options[1].getAttribute('hidden')).toEqual('true');
+        expect(options[2].getAttribute('hidden')).toEqual(null);
+        expect(options[3].getAttribute('hidden')).toEqual('true');
+        expect(options[4].getAttribute('hidden')).toEqual(null);
+        expect(options[5].getAttribute('hidden')).toEqual(null);
+        expect(options[6].getAttribute('hidden')).toEqual('true');
+        expect(options[7].getAttribute('hidden')).toEqual('true');
+      });
+    });
+  });
 });
 
 @Component({
@@ -1289,6 +1341,38 @@ class BasicSelect {
   @ViewChildren(MdOption) options: QueryList<MdOption>;
 }
 
+@Component({
+  selector: 'search-select',
+  template: `
+    <div [style.height.px]="heightAbove"></div>
+    <md-select placeholder="Food" [search]="true" [formControl]="control" [required]="isRequired">
+      <md-option *ngFor="let food of foods" [value]="food.value" [disabled]="food.disabled">
+        {{ food.viewValue }}
+      </md-option>
+    </md-select>
+    <div [style.height.px]="heightBelow"></div>
+  `
+})
+class SearchSelect {
+  foods: any[] = [
+    { value: 'steak-0', viewValue: 'Steak' },
+    { value: 'pizza-1', viewValue: 'Pizza' },
+    { value: 'tacos-2', viewValue: 'Tacos', disabled: true },
+    { value: 'sandwich-3', viewValue: 'Sandwich' },
+    { value: 'chips-4', viewValue: 'Chips' },
+    { value: 'eggs-5', viewValue: 'Eggs' },
+    { value: 'pasta-6', viewValue: 'Pasta' },
+    { value: 'sushi-7', viewValue: 'Sushi' },
+  ];
+  control = new FormControl();
+  isRequired: boolean;
+  heightAbove = 0;
+  heightBelow = 0;
+
+  @ViewChild(MdSelect) select: MdSelect;
+  @ViewChildren(MdOption) options: QueryList<MdOption>;
+}
+
 @Component({
   selector: 'ng-model-select',
   template: `

src/lib/select/select.ts

@@ -222,6 +222,14 @@ export class MdSelect implements AfterContentInit, ControlValueAccessor, OnDestr
   get required() { return this._required; }
   set required(value: any) { this._required = coerceBooleanProperty(value); }
 
+  /** An optional search function. */
+  @Input()
+  get search() { return this._search; }
+  set search(search: boolean) {
+    this._search = search;
+  }
+  private _search: boolean;
+
   /** Event emitted when the select has been opened. */
   @Output() onOpen: EventEmitter<void> = new EventEmitter<void>();
 
@@ -272,6 +280,9 @@ export class MdSelect implements AfterContentInit, ControlValueAccessor, OnDestr
     this._calculateOverlayPosition();
     this._placeholderState = this._isRtl() ? 'floating-rtl' : 'floating-ltr';
     this._panelOpen = true;
+    if (this._search) {
+      this._onSearch('');
+    }
   }
 
   /** Closes the overlay panel and focuses the host element. */
@@ -410,6 +421,18 @@ export class MdSelect implements AfterContentInit, ControlValueAccessor, OnDestr
     scrollContainer.scrollTop = this._scrollTop;
   }
 
+  _onSearch(query:string) {
+    this.options.forEach((option:MdOption) => {
+      let valueIndex = option.value.toLowerCase().indexOf(query.toLowerCase());
+      let viewValueIndex = option.viewValue.toLowerCase().indexOf(query.toLowerCase());
+      if (valueIndex === -1 && viewValueIndex === -1) {
+        option._getHostElement().setAttribute('hidden', 'true');
+      } else {
+        option._getHostElement().removeAttribute('hidden');
+      }
+    });
+  }
+
   /**
    * Sets the selected option based on a value. If no option can be
    * found with the designated value, the select trigger is cleared.
@@ -546,7 +569,7 @@ export class MdSelect implements AfterContentInit, ControlValueAccessor, OnDestr
     // The farthest the panel can be scrolled before it hits the bottom
     const maxScroll = scrollContainerHeight - panelHeight;
 
-    if (this.selected) {
+    if (this.selected && !this._search) {
       const selectedIndex = this._getOptionIndex(this.selected);
       // We must maintain a scroll buffer so the selected option will be scrolled to the
       // center of the overlay panel rather than the top.