@angular/material
Version:
Angular Material
359 lines • 47.3 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { getSupportedInputTypes, Platform } from '@angular/cdk/platform';
import { AutofillMonitor } from '@angular/cdk/text-field';
import { Directive, ElementRef, Inject, Input, NgZone, Optional, Self, HostListener, } from '@angular/core';
import { FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { ErrorStateMatcher, mixinErrorState, } from '@angular/material/core';
import { MatFormFieldControl } from '@angular/material/form-field';
import { Subject } from 'rxjs';
import { getMatInputUnsupportedTypeError } from './input-errors';
import { MAT_INPUT_VALUE_ACCESSOR } from './input-value-accessor';
// Invalid input type. Using one of these will throw an MatInputUnsupportedTypeError.
const MAT_INPUT_INVALID_TYPES = [
'button',
'checkbox',
'file',
'hidden',
'image',
'radio',
'range',
'reset',
'submit'
];
let nextUniqueId = 0;
// Boilerplate for applying mixins to MatInput.
/** @docs-private */
class MatInputBase {
constructor(_defaultErrorStateMatcher, _parentForm, _parentFormGroup,
/** @docs-private */
ngControl) {
this._defaultErrorStateMatcher = _defaultErrorStateMatcher;
this._parentForm = _parentForm;
this._parentFormGroup = _parentFormGroup;
this.ngControl = ngControl;
}
}
const _MatInputMixinBase = mixinErrorState(MatInputBase);
/** Directive that allows a native input to work inside a `MatFormField`. */
export class MatInput extends _MatInputMixinBase {
constructor(_elementRef, _platform,
/** @docs-private */
ngControl, _parentForm, _parentFormGroup, _defaultErrorStateMatcher, inputValueAccessor, _autofillMonitor, ngZone) {
super(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl);
this._elementRef = _elementRef;
this._platform = _platform;
this.ngControl = ngControl;
this._autofillMonitor = _autofillMonitor;
this._uid = `mat-input-${nextUniqueId++}`;
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
this.focused = false;
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
this.stateChanges = new Subject();
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
this.controlType = 'mat-input';
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
this.autofilled = false;
this._disabled = false;
this._required = false;
this._type = 'text';
this._readonly = false;
this._neverEmptyInputTypes = [
'date',
'datetime',
'datetime-local',
'month',
'time',
'week'
].filter(t => getSupportedInputTypes().has(t));
const element = this._elementRef.nativeElement;
const nodeName = element.nodeName.toLowerCase();
// If no input value accessor was explicitly specified, use the element as the input value
// accessor.
this._inputValueAccessor = inputValueAccessor || element;
this._previousNativeValue = this.value;
// Force setter to be called in case id was not specified.
this.id = this.id;
// On some versions of iOS the caret gets stuck in the wrong place when holding down the delete
// key. In order to get around this we need to "jiggle" the caret loose. Since this bug only
// exists on iOS, we only bother to install the listener on iOS.
if (_platform.IOS) {
ngZone.runOutsideAngular(() => {
_elementRef.nativeElement.addEventListener('keyup', (event) => {
let el = event.target;
if (!el.value && !el.selectionStart && !el.selectionEnd) {
// Note: Just setting `0, 0` doesn't fix the issue. Setting
// `1, 1` fixes it for the first time that you type text and
// then hold delete. Toggling to `1, 1` and then back to
// `0, 0` seems to completely fix it.
el.setSelectionRange(1, 1);
el.setSelectionRange(0, 0);
}
});
});
}
this._isServer = !this._platform.isBrowser;
this._isNativeSelect = nodeName === 'select';
this._isTextarea = nodeName === 'textarea';
if (this._isNativeSelect) {
this.controlType = element.multiple ? 'mat-native-select-multiple' :
'mat-native-select';
}
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get disabled() {
if (this.ngControl && this.ngControl.disabled !== null) {
return this.ngControl.disabled;
}
return this._disabled;
}
set disabled(value) {
this._disabled = coerceBooleanProperty(value);
// Browsers may not fire the blur event if the input is disabled too quickly.
// Reset from here to ensure that the element doesn't become stuck.
if (this.focused) {
this.focused = false;
this.stateChanges.next();
}
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get id() { return this._id; }
set id(value) { this._id = value || this._uid; }
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get required() { return this._required; }
set required(value) { this._required = coerceBooleanProperty(value); }
/** Input type of the element. */
get type() { return this._type; }
set type(value) {
this._type = value || 'text';
this._validateType();
// When using Angular inputs, developers are no longer able to set the properties on the native
// input element. To ensure that bindings for `type` work, we need to sync the setter
// with the native property. Textarea elements don't support the type property or attribute.
if (!this._isTextarea && getSupportedInputTypes().has(this._type)) {
this._elementRef.nativeElement.type = this._type;
}
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get value() { return this._inputValueAccessor.value; }
set value(value) {
if (value !== this.value) {
this._inputValueAccessor.value = value;
this.stateChanges.next();
}
}
/** Whether the element is readonly. */
get readonly() { return this._readonly; }
set readonly(value) { this._readonly = coerceBooleanProperty(value); }
ngAfterViewInit() {
if (this._platform.isBrowser) {
this._autofillMonitor.monitor(this._elementRef.nativeElement).subscribe(event => {
this.autofilled = event.isAutofilled;
this.stateChanges.next();
});
}
}
ngOnChanges() {
this.stateChanges.next();
}
ngOnDestroy() {
this.stateChanges.complete();
if (this._platform.isBrowser) {
this._autofillMonitor.stopMonitoring(this._elementRef.nativeElement);
}
}
ngDoCheck() {
if (this.ngControl) {
// We need to re-evaluate this on every change detection cycle, because there are some
// error triggers that we can't subscribe to (e.g. parent form submissions). This means
// that whatever logic is in here has to be super lean or we risk destroying the performance.
this.updateErrorState();
}
// We need to dirty-check the native element's value, because there are some cases where
// we won't be notified when it changes (e.g. the consumer isn't using forms or they're
// updating the value using `emitEvent: false`).
this._dirtyCheckNativeValue();
}
/** Focuses the input. */
focus(options) {
this._elementRef.nativeElement.focus(options);
}
// We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
// In Ivy the `host` bindings will be merged when this class is extended, whereas in
// ViewEngine they're overwritten.
// TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
/** Callback for the cases where the focused state of the input changes. */
// tslint:disable:no-host-decorator-in-concrete
// tslint:enable:no-host-decorator-in-concrete
_focusChanged(isFocused) {
if (isFocused !== this.focused && (!this.readonly || !isFocused)) {
this.focused = isFocused;
this.stateChanges.next();
}
}
// We have to use a `HostListener` here in order to support both Ivy and ViewEngine.
// In Ivy the `host` bindings will be merged when this class is extended, whereas in
// ViewEngine they're overwritten.
// TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.
// tslint:disable-next-line:no-host-decorator-in-concrete
_onInput() {
// This is a noop function and is used to let Angular know whenever the value changes.
// Angular will run a new change detection each time the `input` event has been dispatched.
// It's necessary that Angular recognizes the value change, because when floatingLabel
// is set to false and Angular forms aren't used, the placeholder won't recognize the
// value changes and will not disappear.
// Listening to the input event wouldn't be necessary when the input is using the
// FormsModule or ReactiveFormsModule, because Angular forms also listens to input events.
}
/** Does some manual dirty checking on the native input `value` property. */
_dirtyCheckNativeValue() {
const newValue = this._elementRef.nativeElement.value;
if (this._previousNativeValue !== newValue) {
this._previousNativeValue = newValue;
this.stateChanges.next();
}
}
/** Make sure the input is a supported type. */
_validateType() {
if (MAT_INPUT_INVALID_TYPES.indexOf(this._type) > -1) {
throw getMatInputUnsupportedTypeError(this._type);
}
}
/** Checks whether the input type is one of the types that are never empty. */
_isNeverEmpty() {
return this._neverEmptyInputTypes.indexOf(this._type) > -1;
}
/** Checks whether the input is invalid based on the native validation. */
_isBadInput() {
// The `validity` property won't be present on platform-server.
let validity = this._elementRef.nativeElement.validity;
return validity && validity.badInput;
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get empty() {
return !this._isNeverEmpty() && !this._elementRef.nativeElement.value && !this._isBadInput() &&
!this.autofilled;
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
get shouldLabelFloat() {
if (this._isNativeSelect) {
// For a single-selection `<select>`, the label should float when the selected option has
// a non-empty display value. For a `<select multiple>`, the label *always* floats to avoid
// overlapping the label with the options.
const selectElement = this._elementRef.nativeElement;
const firstOption = selectElement.options[0];
// On most browsers the `selectedIndex` will always be 0, however on IE and Edge it'll be
// -1 if the `value` is set to something, that isn't in the list of options, at a later point.
return this.focused || selectElement.multiple || !this.empty ||
!!(selectElement.selectedIndex > -1 && firstOption && firstOption.label);
}
else {
return this.focused || !this.empty;
}
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
setDescribedByIds(ids) {
this._ariaDescribedby = ids.join(' ');
}
/**
* Implemented as part of MatFormFieldControl.
* @docs-private
*/
onContainerClick() {
// Do not re-focus the input element if the element is already focused. Otherwise it can happen
// that someone clicks on a time input and the cursor resets to the "hours" field while the
// "minutes" field was actually clicked. See: https://github.com/angular/components/issues/12849
if (!this.focused) {
this.focus();
}
}
}
MatInput.decorators = [
{ type: Directive, args: [{
selector: `input[matInput], textarea[matInput], select[matNativeControl],
input[matNativeControl], textarea[matNativeControl]`,
exportAs: 'matInput',
host: {
/**
* @breaking-change 8.0.0 remove .mat-form-field-autofill-control in favor of AutofillMonitor.
*/
'class': 'mat-input-element mat-form-field-autofill-control',
'[class.mat-input-server]': '_isServer',
// Native input properties that are overwritten by Angular inputs need to be synced with
// the native input element. Otherwise property bindings for those don't work.
'[attr.id]': 'id',
'[attr.placeholder]': 'placeholder',
'[attr.data-placeholder]': 'placeholder',
'[disabled]': 'disabled',
'[required]': 'required',
'[attr.readonly]': 'readonly && !_isNativeSelect || null',
'[attr.aria-describedby]': '_ariaDescribedby || null',
'[attr.aria-invalid]': 'errorState',
'[attr.aria-required]': 'required.toString()',
},
providers: [{ provide: MatFormFieldControl, useExisting: MatInput }],
},] }
];
MatInput.ctorParameters = () => [
{ type: ElementRef },
{ type: Platform },
{ type: NgControl, decorators: [{ type: Optional }, { type: Self }] },
{ type: NgForm, decorators: [{ type: Optional }] },
{ type: FormGroupDirective, decorators: [{ type: Optional }] },
{ type: ErrorStateMatcher },
{ type: undefined, decorators: [{ type: Optional }, { type: Self }, { type: Inject, args: [MAT_INPUT_VALUE_ACCESSOR,] }] },
{ type: AutofillMonitor },
{ type: NgZone }
];
MatInput.propDecorators = {
disabled: [{ type: Input }],
id: [{ type: Input }],
placeholder: [{ type: Input }],
required: [{ type: Input }],
type: [{ type: Input }],
errorStateMatcher: [{ type: Input }],
value: [{ type: Input }],
readonly: [{ type: Input }],
_focusChanged: [{ type: HostListener, args: ['focus', ['true'],] }, { type: HostListener, args: ['blur', ['false'],] }],
_onInput: [{ type: HostListener, args: ['input',] }]
};
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {getSupportedInputTypes, Platform} from '@angular/cdk/platform';\nimport {AutofillMonitor} from '@angular/cdk/text-field';\nimport {\n  Directive,\n  DoCheck,\n  ElementRef,\n  Inject,\n  Input,\n  NgZone,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Self,\n  HostListener,\n  AfterViewInit,\n} from '@angular/core';\nimport {FormGroupDirective, NgControl, NgForm} from '@angular/forms';\nimport {\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  ErrorStateMatcher,\n  mixinErrorState,\n} from '@angular/material/core';\nimport {MatFormFieldControl} from '@angular/material/form-field';\nimport {Subject} from 'rxjs';\nimport {getMatInputUnsupportedTypeError} from './input-errors';\nimport {MAT_INPUT_VALUE_ACCESSOR} from './input-value-accessor';\n\n\n// Invalid input type. Using one of these will throw an MatInputUnsupportedTypeError.\nconst MAT_INPUT_INVALID_TYPES = [\n  'button',\n  'checkbox',\n  'file',\n  'hidden',\n  'image',\n  'radio',\n  'range',\n  'reset',\n  'submit'\n];\n\nlet nextUniqueId = 0;\n\n// Boilerplate for applying mixins to MatInput.\n/** @docs-private */\nclass MatInputBase {\n  constructor(public _defaultErrorStateMatcher: ErrorStateMatcher,\n              public _parentForm: NgForm,\n              public _parentFormGroup: FormGroupDirective,\n              /** @docs-private */\n              public ngControl: NgControl) {}\n}\nconst _MatInputMixinBase: CanUpdateErrorStateCtor & typeof MatInputBase =\n    mixinErrorState(MatInputBase);\n\n/** Directive that allows a native input to work inside a `MatFormField`. */\n@Directive({\n  selector: `input[matInput], textarea[matInput], select[matNativeControl],\n      input[matNativeControl], textarea[matNativeControl]`,\n  exportAs: 'matInput',\n  host: {\n    /**\n     * @breaking-change 8.0.0 remove .mat-form-field-autofill-control in favor of AutofillMonitor.\n     */\n    'class': 'mat-input-element mat-form-field-autofill-control',\n    '[class.mat-input-server]': '_isServer',\n    // Native input properties that are overwritten by Angular inputs need to be synced with\n    // the native input element. Otherwise property bindings for those don't work.\n    '[attr.id]': 'id',\n    '[attr.placeholder]': 'placeholder',\n    '[attr.data-placeholder]': 'placeholder',\n    '[disabled]': 'disabled',\n    '[required]': 'required',\n    '[attr.readonly]': 'readonly && !_isNativeSelect || null',\n    '[attr.aria-describedby]': '_ariaDescribedby || null',\n    '[attr.aria-invalid]': 'errorState',\n    '[attr.aria-required]': 'required.toString()',\n  },\n  providers: [{provide: MatFormFieldControl, useExisting: MatInput}],\n})\nexport class MatInput extends _MatInputMixinBase implements MatFormFieldControl<any>, OnChanges,\n    OnDestroy, AfterViewInit, DoCheck, CanUpdateErrorState {\n  protected _uid = `mat-input-${nextUniqueId++}`;\n  protected _previousNativeValue: any;\n  private _inputValueAccessor: {value: any};\n  /** The aria-describedby attribute on the input for improved a11y. */\n  _ariaDescribedby: string;\n\n  /** Whether the component is being rendered on the server. */\n  readonly _isServer: boolean;\n\n  /** Whether the component is a native html select. */\n  readonly _isNativeSelect: boolean;\n\n  /** Whether the component is a textarea. */\n  readonly _isTextarea: boolean;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  focused: boolean = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  readonly stateChanges: Subject<void> = new Subject<void>();\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  controlType: string = 'mat-input';\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  autofilled = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get disabled(): boolean {\n    if (this.ngControl && this.ngControl.disabled !== null) {\n      return this.ngControl.disabled;\n    }\n    return this._disabled;\n  }\n  set disabled(value: boolean) {\n    this._disabled = coerceBooleanProperty(value);\n\n    // Browsers may not fire the blur event if the input is disabled too quickly.\n    // Reset from here to ensure that the element doesn't become stuck.\n    if (this.focused) {\n      this.focused = false;\n      this.stateChanges.next();\n    }\n  }\n  protected _disabled = false;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get id(): string { return this._id; }\n  set id(value: string) { this._id = value || this._uid; }\n  protected _id: string;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input() placeholder: string;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get required(): boolean { return this._required; }\n  set required(value: boolean) { this._required = coerceBooleanProperty(value); }\n  protected _required = false;\n\n  /** Input type of the element. */\n  @Input()\n  get type(): string { return this._type; }\n  set type(value: string) {\n    this._type = value || 'text';\n    this._validateType();\n\n    // When using Angular inputs, developers are no longer able to set the properties on the native\n    // input element. To ensure that bindings for `type` work, we need to sync the setter\n    // with the native property. Textarea elements don't support the type property or attribute.\n    if (!this._isTextarea && getSupportedInputTypes().has(this._type)) {\n      (this._elementRef.nativeElement as HTMLInputElement).type = this._type;\n    }\n  }\n  protected _type = 'text';\n\n  /** An object used to control when error messages are shown. */\n  @Input() errorStateMatcher: ErrorStateMatcher;\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  @Input()\n  get value(): string { return this._inputValueAccessor.value; }\n  set value(value: string) {\n    if (value !== this.value) {\n      this._inputValueAccessor.value = value;\n      this.stateChanges.next();\n    }\n  }\n\n  /** Whether the element is readonly. */\n  @Input()\n  get readonly(): boolean { return this._readonly; }\n  set readonly(value: boolean) { this._readonly = coerceBooleanProperty(value); }\n  private _readonly = false;\n\n  protected _neverEmptyInputTypes = [\n    'date',\n    'datetime',\n    'datetime-local',\n    'month',\n    'time',\n    'week'\n  ].filter(t => getSupportedInputTypes().has(t));\n\n  constructor(\n    protected _elementRef: ElementRef<HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement>,\n    protected _platform: Platform,\n    /** @docs-private */\n    @Optional() @Self() public ngControl: NgControl,\n    @Optional() _parentForm: NgForm,\n    @Optional() _parentFormGroup: FormGroupDirective,\n    _defaultErrorStateMatcher: ErrorStateMatcher,\n    @Optional() @Self() @Inject(MAT_INPUT_VALUE_ACCESSOR) inputValueAccessor: any,\n    private _autofillMonitor: AutofillMonitor,\n    ngZone: NgZone) {\n\n    super(_defaultErrorStateMatcher, _parentForm, _parentFormGroup, ngControl);\n\n    const element = this._elementRef.nativeElement;\n    const nodeName = element.nodeName.toLowerCase();\n\n    // If no input value accessor was explicitly specified, use the element as the input value\n    // accessor.\n    this._inputValueAccessor = inputValueAccessor || element;\n\n    this._previousNativeValue = this.value;\n\n    // Force setter to be called in case id was not specified.\n    this.id = this.id;\n\n    // On some versions of iOS the caret gets stuck in the wrong place when holding down the delete\n    // key. In order to get around this we need to \"jiggle\" the caret loose. Since this bug only\n    // exists on iOS, we only bother to install the listener on iOS.\n    if (_platform.IOS) {\n      ngZone.runOutsideAngular(() => {\n        _elementRef.nativeElement.addEventListener('keyup', (event: Event) => {\n          let el = event.target as HTMLInputElement;\n          if (!el.value && !el.selectionStart && !el.selectionEnd) {\n            // Note: Just setting `0, 0` doesn't fix the issue. Setting\n            // `1, 1` fixes it for the first time that you type text and\n            // then hold delete. Toggling to `1, 1` and then back to\n            // `0, 0` seems to completely fix it.\n            el.setSelectionRange(1, 1);\n            el.setSelectionRange(0, 0);\n          }\n        });\n      });\n    }\n\n    this._isServer = !this._platform.isBrowser;\n    this._isNativeSelect = nodeName === 'select';\n    this._isTextarea = nodeName === 'textarea';\n\n    if (this._isNativeSelect) {\n      this.controlType = (element as HTMLSelectElement).multiple ? 'mat-native-select-multiple' :\n                                                                   'mat-native-select';\n    }\n  }\n\n  ngAfterViewInit() {\n    if (this._platform.isBrowser) {\n      this._autofillMonitor.monitor(this._elementRef.nativeElement).subscribe(event => {\n        this.autofilled = event.isAutofilled;\n        this.stateChanges.next();\n      });\n    }\n  }\n\n  ngOnChanges() {\n    this.stateChanges.next();\n  }\n\n  ngOnDestroy() {\n    this.stateChanges.complete();\n\n    if (this._platform.isBrowser) {\n      this._autofillMonitor.stopMonitoring(this._elementRef.nativeElement);\n    }\n  }\n\n  ngDoCheck() {\n    if (this.ngControl) {\n      // We need to re-evaluate this on every change detection cycle, because there are some\n      // error triggers that we can't subscribe to (e.g. parent form submissions). This means\n      // that whatever logic is in here has to be super lean or we risk destroying the performance.\n      this.updateErrorState();\n    }\n\n    // We need to dirty-check the native element's value, because there are some cases where\n    // we won't be notified when it changes (e.g. the consumer isn't using forms or they're\n    // updating the value using `emitEvent: false`).\n    this._dirtyCheckNativeValue();\n  }\n\n  /** Focuses the input. */\n  focus(options?: FocusOptions): void {\n    this._elementRef.nativeElement.focus(options);\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  /** Callback for the cases where the focused state of the input changes. */\n  // tslint:disable:no-host-decorator-in-concrete\n  @HostListener('focus', ['true'])\n  @HostListener('blur', ['false'])\n  // tslint:enable:no-host-decorator-in-concrete\n  _focusChanged(isFocused: boolean) {\n    if (isFocused !== this.focused && (!this.readonly || !isFocused)) {\n      this.focused = isFocused;\n      this.stateChanges.next();\n    }\n  }\n\n  // We have to use a `HostListener` here in order to support both Ivy and ViewEngine.\n  // In Ivy the `host` bindings will be merged when this class is extended, whereas in\n  // ViewEngine they're overwritten.\n  // TODO(crisbeto): we move this back into `host` once Ivy is turned on by default.\n  // tslint:disable-next-line:no-host-decorator-in-concrete\n  @HostListener('input')\n  _onInput() {\n    // This is a noop function and is used to let Angular know whenever the value changes.\n    // Angular will run a new change detection each time the `input` event has been dispatched.\n    // It's necessary that Angular recognizes the value change, because when floatingLabel\n    // is set to false and Angular forms aren't used, the placeholder won't recognize the\n    // value changes and will not disappear.\n    // Listening to the input event wouldn't be necessary when the input is using the\n    // FormsModule or ReactiveFormsModule, because Angular forms also listens to input events.\n  }\n\n  /** Does some manual dirty checking on the native input `value` property. */\n  protected _dirtyCheckNativeValue() {\n    const newValue = this._elementRef.nativeElement.value;\n\n    if (this._previousNativeValue !== newValue) {\n      this._previousNativeValue = newValue;\n      this.stateChanges.next();\n    }\n  }\n\n  /** Make sure the input is a supported type. */\n  protected _validateType() {\n    if (MAT_INPUT_INVALID_TYPES.indexOf(this._type) > -1) {\n      throw getMatInputUnsupportedTypeError(this._type);\n    }\n  }\n\n  /** Checks whether the input type is one of the types that are never empty. */\n  protected _isNeverEmpty() {\n    return this._neverEmptyInputTypes.indexOf(this._type) > -1;\n  }\n\n  /** Checks whether the input is invalid based on the native validation. */\n  protected _isBadInput() {\n    // The `validity` property won't be present on platform-server.\n    let validity = (this._elementRef.nativeElement as HTMLInputElement).validity;\n    return validity && validity.badInput;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get empty(): boolean {\n    return !this._isNeverEmpty() && !this._elementRef.nativeElement.value && !this._isBadInput() &&\n        !this.autofilled;\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  get shouldLabelFloat(): boolean {\n    if (this._isNativeSelect) {\n      // For a single-selection `<select>`, the label should float when the selected option has\n      // a non-empty display value. For a `<select multiple>`, the label *always* floats to avoid\n      // overlapping the label with the options.\n      const selectElement = this._elementRef.nativeElement as HTMLSelectElement;\n      const firstOption: HTMLOptionElement | undefined = selectElement.options[0];\n\n      // On most browsers the `selectedIndex` will always be 0, however on IE and Edge it'll be\n      // -1 if the `value` is set to something, that isn't in the list of options, at a later point.\n      return this.focused || selectElement.multiple || !this.empty ||\n             !!(selectElement.selectedIndex > -1 && firstOption && firstOption.label);\n    } else {\n      return this.focused || !this.empty;\n    }\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]) {\n    this._ariaDescribedby = ids.join(' ');\n  }\n\n  /**\n   * Implemented as part of MatFormFieldControl.\n   * @docs-private\n   */\n  onContainerClick() {\n    // Do not re-focus the input element if the element is already focused. Otherwise it can happen\n    // that someone clicks on a time input and the cursor resets to the \"hours\" field while the\n    // \"minutes\" field was actually clicked. See: https://github.com/angular/components/issues/12849\n    if (!this.focused) {\n      this.focus();\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_readonly: BooleanInput;\n  static ngAcceptInputType_required: BooleanInput;\n\n  // Accept `any` to avoid conflicts with other directives on `<input>` that may\n  // accept different types.\n  static ngAcceptInputType_value: any;\n}\n"]}