feat(kit): Select add ability to use native select on mobile

projects/core/components/primitive-textfield/primitive-textfield.template.html

@@ -16,6 +16,7 @@
     (tuiAutofilledChange)="onAutofilled($event)"
 >
     <ng-content select="input"></ng-content>
+    <ng-content select="select"></ng-content>
     <input
         #focusableElement
         tuiMaskAccessor

projects/demo/src/modules/components/select/examples/11/index.html

@@ -0,0 +1,27 @@
+<form class="b-form">
+    <tui-select [formControl]="itemControl">
+        Character
+        <select
+            tuiSelect
+            [items]="items"
+        ></select>
+    </tui-select>
+
+    <tui-select
+        class="tui-space_top-4"
+        [formControl]="itemGroupControl"
+        [tuiTextfieldCleaner]="true"
+    >
+        Food
+        <select
+            tuiSelect
+            [items]="groupItems"
+            [labels]="labels"
+        ></select>
+
+        <input
+            tuiTextfield
+            placeholder="Make a choice"
+        />
+    </tui-select>
+</form>

projects/demo/src/modules/components/select/examples/11/index.ts

@@ -0,0 +1,31 @@
+import {Component} from '@angular/core';
+import {FormControl} from '@angular/forms';
+import {changeDetection} from '@demo/emulate/change-detection';
+import {encapsulation} from '@demo/emulate/encapsulation';
+
+@Component({
+    selector: `tui-select-example-11`,
+    templateUrl: `./index.html`,
+    changeDetection,
+    encapsulation,
+})
+export class TuiSelectExample11 {
+    itemControl = new FormControl();
+    itemGroupControl = new FormControl();
+
+    items = [
+        `Luke Skywalker`,
+        `Leia Organa Solo`,
+        `Darth Vader`,
+        `Han Solo`,
+        `Obi-Wan Kenobi`,
+        `Yoda`,
+    ];
+
+    groupItems = [
+        [`Caesar`, `Greek`, `Apple and Chicken`],
+        [`Broccoli Cheddar`, `Chicken and Rice`, `Chicken Noodle`],
+    ];
+
+    labels = [`Salad`, `Soup`];
+}

projects/demo/src/modules/components/select/select.component.ts

@@ -106,6 +106,11 @@ export class ExampleTuiSelectComponent extends AbstractExampleTuiControl {
         HTML: import(`./examples/10/index.html?raw`),
     };
 
+    readonly example11: TuiDocExample = {
+        TypeScript: import(`./examples/11/index.ts?raw`),
+        HTML: import(`./examples/11/index.html?raw`),
+    };
+
     readonly items = [new Account(`Ruble`, 500), new Account(`Dollar`, 237)];
 
     readonly valueTemplateVariants = [``, `Template`];

projects/demo/src/modules/components/select/select.module.ts

@@ -42,6 +42,7 @@ import {TuiSelectExample8} from './examples/8';
 import {TuiSelectExample9} from './examples/9';
 import {ExampleMyAccountComponent} from './examples/9/account/my-account.component';
 import {TuiSelectExample10} from './examples/10';
+import {TuiSelectExample11} from './examples/11';
 import {ExampleTuiSelectComponent} from './select.component';
 
 @NgModule({
@@ -91,6 +92,7 @@ import {ExampleTuiSelectComponent} from './select.component';
         TuiSelectExample8,
         TuiSelectExample9,
         TuiSelectExample10,
+        TuiSelectExample11,
     ],
     exports: [ExampleTuiSelectComponent],
 })

projects/demo/src/modules/components/select/select.template.html

@@ -101,6 +101,21 @@
         >
             <tui-select-example-10></tui-select-example-10>
         </tui-doc-example>
+
+        <tui-doc-example
+            id="native-select"
+            heading="Native select"
+            [content]="example11"
+        >
+            <tui-notification class="tui-space_bottom-4 b-form">
+                You can enable native select on mobile devices by putting
+                <code>select</code>
+                inside with
+                <code>tuiSelect</code>
+                directive as shown below
+            </tui-notification>
+            <tui-select-example-11></tui-select-example-11>
+        </tui-doc-example>
     </ng-template>
 
     <ng-template pageTab>

projects/kit/components/select/index.ts

@@ -1,3 +1,6 @@
+export * from './native-select/native-select';
+export * from './native-select/native-select.component';
+export * from './native-select/native-select-group.component';
 export * from './select.component';
 export * from './select.directive';
 export * from './select.module';

projects/kit/components/select/native-select/native-select-group.component.ts

@@ -0,0 +1,42 @@
+import {ChangeDetectionStrategy, Component, Input, TemplateRef} from '@angular/core';
+import {TuiDataListDirective} from '@taiga-ui/core';
+
+import {AbstractTuiNativeSelect} from './native-select';
+
+@Component({
+    selector: `select[tuiSelect][labels]`,
+    templateUrl: `./native-select-group.template.html`,
+    providers: [
+        {
+            provide: TuiDataListDirective,
+            deps: [TuiNativeSelectGroupComponent],
+            useExisting: TuiNativeSelectGroupComponent,
+        },
+        {
+            provide: TemplateRef,
+            deps: [TuiNativeSelectGroupComponent],
+            useFactory: ({datalist}: TuiNativeSelectGroupComponent) => datalist,
+        },
+        {
+            provide: AbstractTuiNativeSelect,
+            useExisting: TuiNativeSelectGroupComponent,
+        },
+    ],
+    host: {
+        '[attr.aria-invalid]': `host.invalid`,
+        '[disabled]': `host.disabled`,
+        '[tabIndex]': `host.focusable ? 0 : -1`,
+        '[readOnly]': `host.readOnly`,
+        '[value]': `host.value`,
+        '(change)': `host.onValueChange($event.target.value)`,
+    },
+    styleUrls: [`./native-select.style.less`],
+    changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class TuiNativeSelectGroupComponent extends AbstractTuiNativeSelect {
+    @Input()
+    items: readonly string[][] | null = [];
+
+    @Input()
+    labels: readonly string[] = [];
+}

projects/kit/components/select/native-select/native-select-group.template.html

@@ -0,0 +1,16 @@
+<tui-data-list-wrapper
+    *tuiDataList
+    [items]="items"
+    [labels]="labels"
+></tui-data-list-wrapper>
+<optgroup
+    *ngFor="let group of items; let index = index"
+    [label]="labels[index]"
+>
+    <option
+        *ngFor="let option of group"
+        [value]="option"
+    >
+        {{ option }}
+    </option>
+</optgroup>

projects/kit/components/select/native-select/native-select.component.ts

@@ -0,0 +1,39 @@
+import {ChangeDetectionStrategy, Component, Input, TemplateRef} from '@angular/core';
+import {TuiDataListDirective} from '@taiga-ui/core';
+
+import {AbstractTuiNativeSelect} from './native-select';
+
+@Component({
+    selector: `select[tuiSelect]:not([labels])`,
+    templateUrl: `./native-select.template.html`,
+    providers: [
+        {
+            provide: TuiDataListDirective,
+            deps: [TuiNativeSelectComponent],
+            useExisting: TuiNativeSelectComponent,
+        },
+        {
+            provide: TemplateRef,
+            deps: [TuiNativeSelectComponent],
+            useFactory: ({datalist}: TuiNativeSelectComponent) => datalist,
+        },
+        {
+            provide: AbstractTuiNativeSelect,
+            useExisting: TuiNativeSelectComponent,
+        },
+    ],
+    host: {
+        '[attr.aria-invalid]': `host.invalid`,
+        '[disabled]': `host.disabled`,
+        '[tabIndex]': `host.focusable ? 0 : -1`,
+        '[readOnly]': `host.readOnly`,
+        '[value]': `host.value`,
+        '(change)': `host.onValueChange($event.target.value)`,
+    },
+    styleUrls: [`./native-select.style.less`],
+    changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class TuiNativeSelectComponent extends AbstractTuiNativeSelect {
+    @Input()
+    items: readonly string[] | null = [];
+}

projects/kit/components/select/native-select/native-select.style.less

@@ -0,0 +1,6 @@
+@import 'taiga-ui-local';
+
+:host {
+    .fullsize();
+    opacity: 0;
+}

projects/kit/components/select/native-select/native-select.template.html

@@ -0,0 +1,10 @@
+<tui-data-list-wrapper
+    *tuiDataList
+    [items]="items"
+></tui-data-list-wrapper>
+<option
+    *ngFor="let option of items"
+    [value]="option"
+>
+    {{ option }}
+</option>

projects/kit/components/select/native-select/native-select.ts

@@ -0,0 +1,30 @@
+import {
+    Directive,
+    ElementRef,
+    HostBinding,
+    Inject,
+    TemplateRef,
+    ViewChild,
+} from '@angular/core';
+import {TuiIdService} from '@taiga-ui/cdk';
+import {TUI_TEXTFIELD_HOST, TuiDataListDirective, TuiTextfieldHost} from '@taiga-ui/core';
+
+@Directive()
+export abstract class AbstractTuiNativeSelect {
+    @ViewChild(TuiDataListDirective, {read: TemplateRef, static: true})
+    readonly datalist: TemplateRef<any> | null = null;
+
+    constructor(
+        @Inject(TUI_TEXTFIELD_HOST) readonly host: TuiTextfieldHost,
+        @Inject(ElementRef) private readonly elementRef: ElementRef<HTMLInputElement>,
+        @Inject(TuiIdService)
+        private readonly idService: TuiIdService,
+    ) {
+        this.host.process(this.elementRef.nativeElement);
+    }
+
+    @HostBinding(`id`)
+    get id(): string {
+        return this.elementRef.nativeElement.id || this.idService.generate();
+    }
+}

projects/kit/components/select/select.component.ts

@@ -13,6 +13,7 @@ import {
 import {NgControl} from '@angular/forms';
 import {
     AbstractTuiNullableControl,
+    TUI_IS_MOBILE,
     TuiActiveZoneDirective,
     tuiAsControl,
     tuiAsFocusableItemAccessor,
@@ -41,6 +42,7 @@ import {FIXED_DROPDOWN_CONTROLLER_PROVIDER} from '@taiga-ui/kit/providers';
 import {TUI_ITEMS_HANDLERS, TuiItemsHandlers} from '@taiga-ui/kit/tokens';
 import {PolymorpheusContent} from '@tinkoff/ng-polymorpheus';
 
+import {AbstractTuiNativeSelect} from './native-select/native-select';
 import {TUI_SELECT_OPTIONS, TuiSelectOptions} from './select-options';
 
 @Component({
@@ -66,6 +68,9 @@ export class TuiSelectComponent<T>
     @ViewChild(TuiHostedDropdownComponent)
     private readonly hostedDropdown?: TuiHostedDropdownComponent;
 
+    @ContentChild(AbstractTuiNativeSelect, {static: true})
+    private readonly nativeSelect?: AbstractTuiNativeSelect;
+
     @Input()
     @tuiDefaultProp()
     stringify: TuiItemsHandlers<T>['stringify'] = this.itemsHandlers.stringify;
@@ -98,6 +103,8 @@ export class TuiSelectComponent<T>
         private readonly itemsHandlers: TuiItemsHandlers<T>,
         @Inject(TUI_SELECT_OPTIONS)
         private readonly options: TuiSelectOptions<T>,
+        @Inject(TUI_IS_MOBILE)
+        readonly isMobile: boolean,
     ) {
         super(control, changeDetectorRef);
     }
@@ -119,6 +126,10 @@ export class TuiSelectComponent<T>
         );
     }
 
+    get nativeDropdownMode(): boolean {
+        return !!this.nativeSelect && this.isMobile;
+    }
+
     get computedValue(): string {
         return this.value === null ? `` : this.stringify(this.value) || ` `;
     }
@@ -127,9 +138,11 @@ export class TuiSelectComponent<T>
         return this.valueContent || this.computedValue;
     }
 
-    onValueChange(value: string): void {
+    onValueChange(value: T): void {
         if (!value) {
             this.updateValue(null);
+        } else {
+            this.updateValue(value || null);
         }
     }
 

projects/kit/components/select/select.module.ts

@@ -2,15 +2,19 @@ import {CommonModule} from '@angular/common';
 import {NgModule} from '@angular/core';
 import {TuiActiveZoneModule} from '@taiga-ui/cdk';
 import {
+    TuiDataListModule,
     TuiHostedDropdownModule,
     TuiPrimitiveTextfieldModule,
     TuiTextfieldComponent,
     TuiTextfieldControllerModule,
 } from '@taiga-ui/core';
 import {TuiArrowModule} from '@taiga-ui/kit/components/arrow';
+import {TuiDataListWrapperModule} from '@taiga-ui/kit/components/data-list-wrapper';
 import {TuiSelectOptionModule} from '@taiga-ui/kit/components/select-option';
 import {PolymorpheusModule} from '@tinkoff/ng-polymorpheus';
 
+import {TuiNativeSelectComponent} from './native-select/native-select.component';
+import {TuiNativeSelectGroupComponent} from './native-select/native-select-group.component';
 import {TuiSelectComponent} from './select.component';
 import {TuiSelectDirective} from './select.directive';
 
@@ -24,8 +28,21 @@ import {TuiSelectDirective} from './select.directive';
         TuiSelectOptionModule,
         TuiArrowModule,
         TuiTextfieldControllerModule,
+        TuiDataListWrapperModule,
+        TuiDataListModule,
+    ],
+    declarations: [
+        TuiSelectComponent,
+        TuiSelectDirective,
+        TuiNativeSelectComponent,
+        TuiNativeSelectGroupComponent,
+    ],
+    exports: [
+        TuiSelectComponent,
+        TuiSelectDirective,
+        TuiTextfieldComponent,
+        TuiNativeSelectComponent,
+        TuiNativeSelectGroupComponent,
     ],
-    declarations: [TuiSelectComponent, TuiSelectDirective],
-    exports: [TuiSelectComponent, TuiSelectDirective, TuiTextfieldComponent],
 })
 export class TuiSelectModule {}