@angular/material
Version:
Angular Material
294 lines • 44.1 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 { Directive, ElementRef, Optional, InjectionToken, Inject, Injector, InjectFlags, } from '@angular/core';
import { NG_VALUE_ACCESSOR, NG_VALIDATORS, NgForm, FormGroupDirective, NgControl, Validators, } from '@angular/forms';
import { mixinErrorState, MAT_DATE_FORMATS, DateAdapter, ErrorStateMatcher, } from '@angular/material/core';
import { BACKSPACE } from '@angular/cdk/keycodes';
import { MatDatepickerInputBase } from './datepicker-input-base';
import { DateRange } from './date-selection-model';
/**
* Used to provide the date range input wrapper component
* to the parts without circular dependencies.
*/
export const MAT_DATE_RANGE_INPUT_PARENT = new InjectionToken('MAT_DATE_RANGE_INPUT_PARENT');
/**
* Base class for the individual inputs that can be projected inside a `mat-date-range-input`.
*/
class MatDateRangeInputPartBase extends MatDatepickerInputBase {
constructor(_rangeInput, elementRef, _defaultErrorStateMatcher, _injector, _parentForm, _parentFormGroup, dateAdapter, dateFormats) {
super(elementRef, dateAdapter, dateFormats);
this._rangeInput = _rangeInput;
this._defaultErrorStateMatcher = _defaultErrorStateMatcher;
this._injector = _injector;
this._parentForm = _parentForm;
this._parentFormGroup = _parentFormGroup;
}
ngOnInit() {
// We need the date input to provide itself as a `ControlValueAccessor` and a `Validator`, while
// injecting its `NgControl` so that the error state is handled correctly. This introduces a
// circular dependency, because both `ControlValueAccessor` and `Validator` depend on the input
// itself. Usually we can work around it for the CVA, but there's no API to do it for the
// validator. We work around it here by injecting the `NgControl` in `ngOnInit`, after
// everything has been resolved.
const ngControl = this._injector.get(NgControl, null, InjectFlags.Self);
if (ngControl) {
this.ngControl = ngControl;
}
}
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();
}
}
/** Gets whether the input is empty. */
isEmpty() {
return this._elementRef.nativeElement.value.length === 0;
}
/** Gets the placeholder of the input. */
_getPlaceholder() {
return this._elementRef.nativeElement.placeholder;
}
/** Focuses the input. */
focus() {
this._elementRef.nativeElement.focus();
}
/** Handles `input` events on the input element. */
_onInput(value) {
super._onInput(value);
this._rangeInput._handleChildValueChange();
}
/** Opens the datepicker associated with the input. */
_openPopup() {
this._rangeInput._openDatepicker();
}
/** Gets the minimum date from the range input. */
_getMinDate() {
return this._rangeInput.min;
}
/** Gets the maximum date from the range input. */
_getMaxDate() {
return this._rangeInput.max;
}
/** Gets the date filter function from the range input. */
_getDateFilter() {
return this._rangeInput.dateFilter;
}
_parentDisabled() {
return this._rangeInput._groupDisabled;
}
_shouldHandleChangeEvent({ source }) {
return source !== this._rangeInput._startInput && source !== this._rangeInput._endInput;
}
_assignValueProgrammatically(value) {
super._assignValueProgrammatically(value);
const opposite = (this === this._rangeInput._startInput ? this._rangeInput._endInput :
this._rangeInput._startInput);
opposite === null || opposite === void 0 ? void 0 : opposite._validatorOnChange();
}
}
MatDateRangeInputPartBase.decorators = [
{ type: Directive }
];
MatDateRangeInputPartBase.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [MAT_DATE_RANGE_INPUT_PARENT,] }] },
{ type: ElementRef },
{ type: ErrorStateMatcher },
{ type: Injector },
{ type: NgForm, decorators: [{ type: Optional }] },
{ type: FormGroupDirective, decorators: [{ type: Optional }] },
{ type: DateAdapter, decorators: [{ type: Optional }] },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_DATE_FORMATS,] }] }
];
const _MatDateRangeInputBase =
// Needs to be `as any`, because the base class is abstract.
mixinErrorState(MatDateRangeInputPartBase);
/** Input for entering the start date in a `mat-date-range-input`. */
export class MatStartDate extends _MatDateRangeInputBase {
constructor(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup, dateAdapter, dateFormats) {
// TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to
// handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this
// constructor once ViewEngine is removed.
super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup, dateAdapter, dateFormats);
/** Validator that checks that the start date isn't after the end date. */
this._startValidator = (control) => {
const start = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(control.value));
const end = this._model ? this._model.selection.end : null;
return (!start || !end ||
this._dateAdapter.compareDate(start, end) <= 0) ?
null : { 'matStartDateInvalid': { 'end': end, 'actual': start } };
};
this._validator = Validators.compose([...super._getValidators(), this._startValidator]);
}
ngOnInit() {
// Normally this happens automatically, but it seems to break if not added explicitly when all
// of the criteria below are met:
// 1) The class extends a TS mixin.
// 2) The application is running in ViewEngine.
// 3) The application is being transpiled through tsickle.
// This can be removed once google3 is completely migrated to Ivy.
super.ngOnInit();
}
ngDoCheck() {
// Normally this happens automatically, but it seems to break if not added explicitly when all
// of the criteria below are met:
// 1) The class extends a TS mixin.
// 2) The application is running in ViewEngine.
// 3) The application is being transpiled through tsickle.
// This can be removed once google3 is completely migrated to Ivy.
super.ngDoCheck();
}
_getValueFromModel(modelValue) {
return modelValue.start;
}
_assignValueToModel(value) {
if (this._model) {
const range = new DateRange(value, this._model.selection.end);
this._model.updateSelection(range, this);
}
}
_formatValue(value) {
super._formatValue(value);
// Any time the input value is reformatted we need to tell the parent.
this._rangeInput._handleChildValueChange();
}
/** Gets the value that should be used when mirroring the input's size. */
getMirrorValue() {
const element = this._elementRef.nativeElement;
const value = element.value;
return value.length > 0 ? value : element.placeholder;
}
}
MatStartDate.decorators = [
{ type: Directive, args: [{
selector: 'input[matStartDate]',
host: {
'class': 'mat-start-date mat-date-range-input-inner',
'[disabled]': 'disabled',
'(input)': '_onInput($event.target.value)',
'(change)': '_onChange()',
'(keydown)': '_onKeydown($event)',
'[attr.id]': '_rangeInput.id',
'[attr.aria-haspopup]': '_rangeInput.rangePicker ? "dialog" : null',
'[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',
'[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',
'[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',
'(blur)': '_onBlur()',
'type': 'text',
},
providers: [
{ provide: NG_VALUE_ACCESSOR, useExisting: MatStartDate, multi: true },
{ provide: NG_VALIDATORS, useExisting: MatStartDate, multi: true }
],
// These need to be specified explicitly, because some tooling doesn't
// seem to pick them up from the base class. See #20932.
outputs: ['dateChange', 'dateInput'],
inputs: ['errorStateMatcher']
},] }
];
MatStartDate.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [MAT_DATE_RANGE_INPUT_PARENT,] }] },
{ type: ElementRef },
{ type: ErrorStateMatcher },
{ type: Injector },
{ type: NgForm, decorators: [{ type: Optional }] },
{ type: FormGroupDirective, decorators: [{ type: Optional }] },
{ type: DateAdapter, decorators: [{ type: Optional }] },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_DATE_FORMATS,] }] }
];
/** Input for entering the end date in a `mat-date-range-input`. */
export class MatEndDate extends _MatDateRangeInputBase {
constructor(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup, dateAdapter, dateFormats) {
// TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to
// handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this
// constructor once ViewEngine is removed.
super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup, dateAdapter, dateFormats);
/** Validator that checks that the end date isn't before the start date. */
this._endValidator = (control) => {
const end = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(control.value));
const start = this._model ? this._model.selection.start : null;
return (!end || !start ||
this._dateAdapter.compareDate(end, start) >= 0) ?
null : { 'matEndDateInvalid': { 'start': start, 'actual': end } };
};
this._validator = Validators.compose([...super._getValidators(), this._endValidator]);
}
ngOnInit() {
// Normally this happens automatically, but it seems to break if not added explicitly when all
// of the criteria below are met:
// 1) The class extends a TS mixin.
// 2) The application is running in ViewEngine.
// 3) The application is being transpiled through tsickle.
// This can be removed once google3 is completely migrated to Ivy.
super.ngOnInit();
}
ngDoCheck() {
// Normally this happens automatically, but it seems to break if not added explicitly when all
// of the criteria below are met:
// 1) The class extends a TS mixin.
// 2) The application is running in ViewEngine.
// 3) The application is being transpiled through tsickle.
// This can be removed once google3 is completely migrated to Ivy.
super.ngDoCheck();
}
_getValueFromModel(modelValue) {
return modelValue.end;
}
_assignValueToModel(value) {
if (this._model) {
const range = new DateRange(this._model.selection.start, value);
this._model.updateSelection(range, this);
}
}
_onKeydown(event) {
// If the user is pressing backspace on an empty end input, move focus back to the start.
if (event.keyCode === BACKSPACE && !this._elementRef.nativeElement.value) {
this._rangeInput._startInput.focus();
}
super._onKeydown(event);
}
}
MatEndDate.decorators = [
{ type: Directive, args: [{
selector: 'input[matEndDate]',
host: {
'class': 'mat-end-date mat-date-range-input-inner',
'[disabled]': 'disabled',
'(input)': '_onInput($event.target.value)',
'(change)': '_onChange()',
'(keydown)': '_onKeydown($event)',
'[attr.aria-haspopup]': '_rangeInput.rangePicker ? "dialog" : null',
'[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',
'[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',
'[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',
'(blur)': '_onBlur()',
'type': 'text',
},
providers: [
{ provide: NG_VALUE_ACCESSOR, useExisting: MatEndDate, multi: true },
{ provide: NG_VALIDATORS, useExisting: MatEndDate, multi: true }
],
// These need to be specified explicitly, because some tooling doesn't
// seem to pick them up from the base class. See #20932.
outputs: ['dateChange', 'dateInput'],
inputs: ['errorStateMatcher']
},] }
];
MatEndDate.ctorParameters = () => [
{ type: undefined, decorators: [{ type: Inject, args: [MAT_DATE_RANGE_INPUT_PARENT,] }] },
{ type: ElementRef },
{ type: ErrorStateMatcher },
{ type: Injector },
{ type: NgForm, decorators: [{ type: Optional }] },
{ type: FormGroupDirective, decorators: [{ type: Optional }] },
{ type: DateAdapter, decorators: [{ type: Optional }] },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_DATE_FORMATS,] }] }
];
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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 {\n  Directive,\n  ElementRef,\n  Optional,\n  InjectionToken,\n  Inject,\n  OnInit,\n  Injector,\n  InjectFlags,\n  DoCheck,\n} from '@angular/core';\nimport {\n  NG_VALUE_ACCESSOR,\n  NG_VALIDATORS,\n  NgForm,\n  FormGroupDirective,\n  NgControl,\n  ValidatorFn,\n  Validators,\n  AbstractControl,\n  ValidationErrors,\n} from '@angular/forms';\nimport {\n  CanUpdateErrorState,\n  CanUpdateErrorStateCtor,\n  mixinErrorState,\n  MAT_DATE_FORMATS,\n  DateAdapter,\n  MatDateFormats,\n  ErrorStateMatcher,\n} from '@angular/material/core';\nimport {BooleanInput} from '@angular/cdk/coercion';\nimport {BACKSPACE} from '@angular/cdk/keycodes';\nimport {MatDatepickerInputBase, DateFilterFn} from './datepicker-input-base';\nimport {DateRange, DateSelectionModelChange} from './date-selection-model';\n\n/** Parent component that should be wrapped around `MatStartDate` and `MatEndDate`. */\nexport interface MatDateRangeInputParent<D> {\n  id: string;\n  min: D | null;\n  max: D | null;\n  dateFilter: DateFilterFn<D>;\n  rangePicker: {\n    opened: boolean;\n    id: string;\n  };\n  _startInput: MatDateRangeInputPartBase<D>;\n  _endInput: MatDateRangeInputPartBase<D>;\n  _groupDisabled: boolean;\n  _handleChildValueChange(): void;\n  _openDatepicker(): void;\n}\n\n/**\n * Used to provide the date range input wrapper component\n * to the parts without circular dependencies.\n */\nexport const MAT_DATE_RANGE_INPUT_PARENT =\n    new InjectionToken<MatDateRangeInputParent<unknown>>('MAT_DATE_RANGE_INPUT_PARENT');\n\n/**\n * Base class for the individual inputs that can be projected inside a `mat-date-range-input`.\n */\n@Directive()\nabstract class MatDateRangeInputPartBase<D>\n  extends MatDatepickerInputBase<DateRange<D>> implements OnInit, DoCheck {\n\n  /** @docs-private */\n  ngControl: NgControl;\n\n  /** @docs-private */\n  abstract updateErrorState(): void;\n\n  protected abstract _validator: ValidatorFn | null;\n  protected abstract _assignValueToModel(value: D | null): void;\n  protected abstract _getValueFromModel(modelValue: DateRange<D>): D | null;\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) public _rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    public _defaultErrorStateMatcher: ErrorStateMatcher,\n    private _injector: Injector,\n    @Optional() public _parentForm: NgForm,\n    @Optional() public _parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n    super(elementRef, dateAdapter, dateFormats);\n  }\n\n  ngOnInit() {\n    // We need the date input to provide itself as a `ControlValueAccessor` and a `Validator`, while\n    // injecting its `NgControl` so that the error state is handled correctly. This introduces a\n    // circular dependency, because both `ControlValueAccessor` and `Validator` depend on the input\n    // itself. Usually we can work around it for the CVA, but there's no API to do it for the\n    // validator. We work around it here by injecting the `NgControl` in `ngOnInit`, after\n    // everything has been resolved.\n    const ngControl = this._injector.get(NgControl, null, InjectFlags.Self);\n\n    if (ngControl) {\n      this.ngControl = ngControl;\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\n  /** Gets whether the input is empty. */\n  isEmpty(): boolean {\n    return this._elementRef.nativeElement.value.length === 0;\n  }\n\n  /** Gets the placeholder of the input. */\n  _getPlaceholder() {\n    return this._elementRef.nativeElement.placeholder;\n  }\n\n  /** Focuses the input. */\n  focus(): void {\n    this._elementRef.nativeElement.focus();\n  }\n\n  /** Handles `input` events on the input element. */\n  _onInput(value: string) {\n    super._onInput(value);\n    this._rangeInput._handleChildValueChange();\n  }\n\n  /** Opens the datepicker associated with the input. */\n  protected _openPopup(): void {\n    this._rangeInput._openDatepicker();\n  }\n\n  /** Gets the minimum date from the range input. */\n  _getMinDate() {\n    return this._rangeInput.min;\n  }\n\n  /** Gets the maximum date from the range input. */\n  _getMaxDate() {\n    return this._rangeInput.max;\n  }\n\n  /** Gets the date filter function from the range input. */\n  protected _getDateFilter() {\n    return this._rangeInput.dateFilter;\n  }\n\n  protected _parentDisabled() {\n    return this._rangeInput._groupDisabled;\n  }\n\n  protected _shouldHandleChangeEvent({source}: DateSelectionModelChange<DateRange<D>>): boolean {\n    return source !== this._rangeInput._startInput && source !== this._rangeInput._endInput;\n  }\n\n  protected _assignValueProgrammatically(value: D | null) {\n    super._assignValueProgrammatically(value);\n    const opposite = (this === this._rangeInput._startInput ? this._rangeInput._endInput :\n        this._rangeInput._startInput) as MatDateRangeInputPartBase<D> | undefined;\n    opposite?._validatorOnChange();\n  }\n}\n\nconst _MatDateRangeInputBase:\n    CanUpdateErrorStateCtor & typeof MatDateRangeInputPartBase =\n    // Needs to be `as any`, because the base class is abstract.\n    mixinErrorState(MatDateRangeInputPartBase as any);\n\n/** Input for entering the start date in a `mat-date-range-input`. */\n@Directive({\n  selector: 'input[matStartDate]',\n  host: {\n    'class': 'mat-start-date mat-date-range-input-inner',\n    '[disabled]': 'disabled',\n    '(input)': '_onInput($event.target.value)',\n    '(change)': '_onChange()',\n    '(keydown)': '_onKeydown($event)',\n    '[attr.id]': '_rangeInput.id',\n    '[attr.aria-haspopup]': '_rangeInput.rangePicker ? \"dialog\" : null',\n    '[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',\n    '[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',\n    '[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',\n    '(blur)': '_onBlur()',\n    'type': 'text',\n  },\n  providers: [\n    {provide: NG_VALUE_ACCESSOR, useExisting: MatStartDate, multi: true},\n    {provide: NG_VALIDATORS, useExisting: MatStartDate, multi: true}\n  ],\n  // These need to be specified explicitly, because some tooling doesn't\n  // seem to pick them up from the base class. See #20932.\n  outputs: ['dateChange', 'dateInput'],\n  inputs: ['errorStateMatcher']\n})\nexport class MatStartDate<D> extends _MatDateRangeInputBase<D> implements\n    CanUpdateErrorState, DoCheck, OnInit {\n  /** Validator that checks that the start date isn't after the end date. */\n  private _startValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const start = this._dateAdapter.getValidDateOrNull(\n      this._dateAdapter.deserialize(control.value));\n    const end = this._model ? this._model.selection.end : null;\n    return (!start || !end ||\n        this._dateAdapter.compareDate(start, end) <= 0) ?\n        null : {'matStartDateInvalid': {'end': end, 'actual': start}};\n  }\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    defaultErrorStateMatcher: ErrorStateMatcher,\n    injector: Injector,\n    @Optional() parentForm: NgForm,\n    @Optional() parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n\n    // TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to\n    // handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this\n    // constructor once ViewEngine is removed.\n    super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup,\n        dateAdapter, dateFormats);\n  }\n\n  ngOnInit() {\n    // Normally this happens automatically, but it seems to break if not added explicitly when all\n    // of the criteria below are met:\n    // 1) The class extends a TS mixin.\n    // 2) The application is running in ViewEngine.\n    // 3) The application is being transpiled through tsickle.\n    // This can be removed once google3 is completely migrated to Ivy.\n    super.ngOnInit();\n  }\n\n  ngDoCheck() {\n    // Normally this happens automatically, but it seems to break if not added explicitly when all\n    // of the criteria below are met:\n    // 1) The class extends a TS mixin.\n    // 2) The application is running in ViewEngine.\n    // 3) The application is being transpiled through tsickle.\n    // This can be removed once google3 is completely migrated to Ivy.\n    super.ngDoCheck();\n  }\n\n  protected _validator = Validators.compose([...super._getValidators(), this._startValidator]);\n\n  protected _getValueFromModel(modelValue: DateRange<D>) {\n    return modelValue.start;\n  }\n\n  protected _assignValueToModel(value: D | null) {\n    if (this._model) {\n      const range = new DateRange(value, this._model.selection.end);\n      this._model.updateSelection(range, this);\n    }\n  }\n\n  protected _formatValue(value: D | null) {\n    super._formatValue(value);\n\n    // Any time the input value is reformatted we need to tell the parent.\n    this._rangeInput._handleChildValueChange();\n  }\n\n  /** Gets the value that should be used when mirroring the input's size. */\n  getMirrorValue(): string {\n    const element = this._elementRef.nativeElement;\n    const value = element.value;\n    return value.length > 0 ? value : element.placeholder;\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n\n\n/** Input for entering the end date in a `mat-date-range-input`. */\n@Directive({\n  selector: 'input[matEndDate]',\n  host: {\n    'class': 'mat-end-date mat-date-range-input-inner',\n    '[disabled]': 'disabled',\n    '(input)': '_onInput($event.target.value)',\n    '(change)': '_onChange()',\n    '(keydown)': '_onKeydown($event)',\n    '[attr.aria-haspopup]': '_rangeInput.rangePicker ? \"dialog\" : null',\n    '[attr.aria-owns]': '(_rangeInput.rangePicker?.opened && _rangeInput.rangePicker.id) || null',\n    '[attr.min]': '_getMinDate() ? _dateAdapter.toIso8601(_getMinDate()) : null',\n    '[attr.max]': '_getMaxDate() ? _dateAdapter.toIso8601(_getMaxDate()) : null',\n    '(blur)': '_onBlur()',\n    'type': 'text',\n  },\n  providers: [\n    {provide: NG_VALUE_ACCESSOR, useExisting: MatEndDate, multi: true},\n    {provide: NG_VALIDATORS, useExisting: MatEndDate, multi: true}\n  ],\n  // These need to be specified explicitly, because some tooling doesn't\n  // seem to pick them up from the base class. See #20932.\n  outputs: ['dateChange', 'dateInput'],\n  inputs: ['errorStateMatcher']\n})\nexport class MatEndDate<D> extends _MatDateRangeInputBase<D> implements\n    CanUpdateErrorState, DoCheck, OnInit {\n  /** Validator that checks that the end date isn't before the start date. */\n  private _endValidator: ValidatorFn = (control: AbstractControl): ValidationErrors | null => {\n    const end = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(control.value));\n    const start = this._model ? this._model.selection.start : null;\n    return (!end || !start ||\n        this._dateAdapter.compareDate(end, start) >= 0) ?\n        null : {'matEndDateInvalid': {'start': start, 'actual': end}};\n  }\n\n  constructor(\n    @Inject(MAT_DATE_RANGE_INPUT_PARENT) rangeInput: MatDateRangeInputParent<D>,\n    elementRef: ElementRef<HTMLInputElement>,\n    defaultErrorStateMatcher: ErrorStateMatcher,\n    injector: Injector,\n    @Optional() parentForm: NgForm,\n    @Optional() parentFormGroup: FormGroupDirective,\n    @Optional() dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_DATE_FORMATS) dateFormats: MatDateFormats) {\n\n    // TODO(crisbeto): this constructor shouldn't be necessary, but ViewEngine doesn't seem to\n    // handle DI correctly when it is inherited from `MatDateRangeInputPartBase`. We can drop this\n    // constructor once ViewEngine is removed.\n    super(rangeInput, elementRef, defaultErrorStateMatcher, injector, parentForm, parentFormGroup,\n        dateAdapter, dateFormats);\n  }\n\n  ngOnInit() {\n    // Normally this happens automatically, but it seems to break if not added explicitly when all\n    // of the criteria below are met:\n    // 1) The class extends a TS mixin.\n    // 2) The application is running in ViewEngine.\n    // 3) The application is being transpiled through tsickle.\n    // This can be removed once google3 is completely migrated to Ivy.\n    super.ngOnInit();\n  }\n\n  ngDoCheck() {\n    // Normally this happens automatically, but it seems to break if not added explicitly when all\n    // of the criteria below are met:\n    // 1) The class extends a TS mixin.\n    // 2) The application is running in ViewEngine.\n    // 3) The application is being transpiled through tsickle.\n    // This can be removed once google3 is completely migrated to Ivy.\n    super.ngDoCheck();\n  }\n\n  protected _validator = Validators.compose([...super._getValidators(), this._endValidator]);\n\n  protected _getValueFromModel(modelValue: DateRange<D>) {\n    return modelValue.end;\n  }\n\n  protected _assignValueToModel(value: D | null) {\n    if (this._model) {\n      const range = new DateRange(this._model.selection.start, value);\n      this._model.updateSelection(range, this);\n    }\n  }\n\n  _onKeydown(event: KeyboardEvent) {\n    // If the user is pressing backspace on an empty end input, move focus back to the start.\n    if (event.keyCode === BACKSPACE && !this._elementRef.nativeElement.value) {\n      this._rangeInput._startInput.focus();\n    }\n\n    super._onKeydown(event);\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n"]}