@angular/material
Version:
Angular Material
292 lines • 42.7 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 { Component, ChangeDetectionStrategy, ViewEncapsulation, Input, Optional, ContentChild, ChangeDetectorRef, Self, ElementRef, Inject, } from '@angular/core';
import { MatFormFieldControl, MatFormField, MAT_FORM_FIELD } from '@angular/material/form-field';
import { DateAdapter } from '@angular/material/core';
import { ControlContainer } from '@angular/forms';
import { Subject, merge } from 'rxjs';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { MatStartDate, MatEndDate, MAT_DATE_RANGE_INPUT_PARENT, } from './date-range-input-parts';
import { createMissingDateImplError } from './datepicker-errors';
import { dateInputsHaveChanged } from './datepicker-input-base';
import { MatDateRangePicker } from './date-range-picker';
let nextUniqueId = 0;
export class MatDateRangeInput {
constructor(_changeDetectorRef, _elementRef, control, _dateAdapter, _formField) {
this._changeDetectorRef = _changeDetectorRef;
this._elementRef = _elementRef;
this._dateAdapter = _dateAdapter;
this._formField = _formField;
/** Unique ID for the input. */
this.id = `mat-date-range-input-${nextUniqueId++}`;
/** Whether the control is focused. */
this.focused = false;
/** Name of the form control. */
this.controlType = 'mat-date-range-input';
this._groupDisabled = false;
/** Value for the `aria-describedby` attribute of the inputs. */
this._ariaDescribedBy = null;
/** Separator text to be shown between the inputs. */
this.separator = '–';
/** Start of the comparison range that should be shown in the calendar. */
this.comparisonStart = null;
/** End of the comparison range that should be shown in the calendar. */
this.comparisonEnd = null;
/** Emits when the input's state has changed. */
this.stateChanges = new Subject();
if (!_dateAdapter && (typeof ngDevMode === 'undefined' || ngDevMode)) {
throw createMissingDateImplError('DateAdapter');
}
// TODO(crisbeto): remove `as any` after #18206 lands.
this.ngControl = control;
}
/** Current value of the range input. */
get value() {
return this._model ? this._model.selection : null;
}
/** Whether the control's label should float. */
get shouldLabelFloat() {
return this.focused || !this.empty;
}
/**
* Implemented as a part of `MatFormFieldControl`.
* Set the placeholder attribute on `matStartDate` and `matEndDate`.
* @docs-private
*/
get placeholder() {
var _a, _b;
const start = ((_a = this._startInput) === null || _a === void 0 ? void 0 : _a._getPlaceholder()) || '';
const end = ((_b = this._endInput) === null || _b === void 0 ? void 0 : _b._getPlaceholder()) || '';
return (start || end) ? `${start} ${this.separator} ${end}` : '';
}
/** The range picker that this input is associated with. */
get rangePicker() { return this._rangePicker; }
set rangePicker(rangePicker) {
if (rangePicker) {
this._model = rangePicker._registerInput(this);
this._rangePicker = rangePicker;
this._registerModel(this._model);
}
}
/** Whether the input is required. */
get required() { return !!this._required; }
set required(value) {
this._required = coerceBooleanProperty(value);
}
/** Function that can be used to filter out dates within the date range picker. */
get dateFilter() { return this._dateFilter; }
set dateFilter(value) {
const start = this._startInput;
const end = this._endInput;
const wasMatchingStart = start && start._matchesFilter(start.value);
const wasMatchingEnd = end && end._matchesFilter(start.value);
this._dateFilter = value;
if (start && start._matchesFilter(start.value) !== wasMatchingStart) {
start._validatorOnChange();
}
if (end && end._matchesFilter(end.value) !== wasMatchingEnd) {
end._validatorOnChange();
}
}
/** The minimum valid date. */
get min() { return this._min; }
set min(value) {
const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));
if (!this._dateAdapter.sameDate(validValue, this._min)) {
this._min = validValue;
this._revalidate();
}
}
/** The maximum valid date. */
get max() { return this._max; }
set max(value) {
const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));
if (!this._dateAdapter.sameDate(validValue, this._max)) {
this._max = validValue;
this._revalidate();
}
}
/** Whether the input is disabled. */
get disabled() {
return (this._startInput && this._endInput) ?
(this._startInput.disabled && this._endInput.disabled) :
this._groupDisabled;
}
set disabled(value) {
const newValue = coerceBooleanProperty(value);
if (newValue !== this._groupDisabled) {
this._groupDisabled = newValue;
this.stateChanges.next(undefined);
}
}
/** Whether the input is in an error state. */
get errorState() {
if (this._startInput && this._endInput) {
return this._startInput.errorState || this._endInput.errorState;
}
return false;
}
/** Whether the datepicker input is empty. */
get empty() {
const startEmpty = this._startInput ? this._startInput.isEmpty() : false;
const endEmpty = this._endInput ? this._endInput.isEmpty() : false;
return startEmpty && endEmpty;
}
/**
* Implemented as a part of `MatFormFieldControl`.
* @docs-private
*/
setDescribedByIds(ids) {
this._ariaDescribedBy = ids.length ? ids.join(' ') : null;
}
/**
* Implemented as a part of `MatFormFieldControl`.
* @docs-private
*/
onContainerClick() {
if (!this.focused && !this.disabled) {
if (!this._model || !this._model.selection.start) {
this._startInput.focus();
}
else {
this._endInput.focus();
}
}
}
ngAfterContentInit() {
if (typeof ngDevMode === 'undefined' || ngDevMode) {
if (!this._startInput) {
throw Error('mat-date-range-input must contain a matStartDate input');
}
if (!this._endInput) {
throw Error('mat-date-range-input must contain a matEndDate input');
}
}
if (this._model) {
this._registerModel(this._model);
}
// We don't need to unsubscribe from this, because we
// know that the input streams will be completed on destroy.
merge(this._startInput.stateChanges, this._endInput.stateChanges).subscribe(() => {
this.stateChanges.next(undefined);
});
}
ngOnChanges(changes) {
if (dateInputsHaveChanged(changes, this._dateAdapter)) {
this.stateChanges.next(undefined);
}
}
ngOnDestroy() {
this.stateChanges.complete();
}
/** Gets the date at which the calendar should start. */
getStartValue() {
return this.value ? this.value.start : null;
}
/** Gets the input's theme palette. */
getThemePalette() {
return this._formField ? this._formField.color : undefined;
}
/** Gets the element to which the calendar overlay should be attached. */
getConnectedOverlayOrigin() {
return this._formField ? this._formField.getConnectedOverlayOrigin() : this._elementRef;
}
/** Gets the value that is used to mirror the state input. */
_getInputMirrorValue() {
return this._startInput ? this._startInput.getMirrorValue() : '';
}
/** Whether the input placeholders should be hidden. */
_shouldHidePlaceholders() {
return this._startInput ? !this._startInput.isEmpty() : false;
}
/** Handles the value in one of the child inputs changing. */
_handleChildValueChange() {
this.stateChanges.next(undefined);
this._changeDetectorRef.markForCheck();
}
/** Opens the date range picker associated with the input. */
_openDatepicker() {
if (this._rangePicker) {
this._rangePicker.open();
}
}
/** Whether the separate text should be hidden. */
_shouldHideSeparator() {
return (!this._formField || this._formField._hideControlPlaceholder()) && this.empty;
}
/** Gets the value for the `aria-labelledby` attribute of the inputs. */
_getAriaLabelledby() {
const formField = this._formField;
return formField && formField._hasFloatingLabel() ? formField._labelId : null;
}
/** Re-runs the validators on the start/end inputs. */
_revalidate() {
if (this._startInput) {
this._startInput._validatorOnChange();
}
if (this._endInput) {
this._endInput._validatorOnChange();
}
}
/** Registers the current date selection model with the start/end inputs. */
_registerModel(model) {
if (this._startInput) {
this._startInput._registerModel(model);
}
if (this._endInput) {
this._endInput._registerModel(model);
}
}
}
MatDateRangeInput.decorators = [
{ type: Component, args: [{
selector: 'mat-date-range-input',
template: "<div\n class=\"mat-date-range-input-container\"\n cdkMonitorSubtreeFocus\n (cdkFocusChange)=\"focused = $event !== null\">\n <div class=\"mat-date-range-input-start-wrapper\">\n <ng-content select=\"input[matStartDate]\"></ng-content>\n <span\n class=\"mat-date-range-input-mirror\"\n aria-hidden=\"true\">{{_getInputMirrorValue()}}</span>\n </div>\n\n <span\n class=\"mat-date-range-input-separator\"\n [class.mat-date-range-input-separator-hidden]=\"_shouldHideSeparator()\">{{separator}}</span>\n\n <div class=\"mat-date-range-input-end-wrapper\">\n <ng-content select=\"input[matEndDate]\"></ng-content>\n </div>\n</div>\n\n",
exportAs: 'matDateRangeInput',
host: {
'class': 'mat-date-range-input',
'[class.mat-date-range-input-hide-placeholders]': '_shouldHidePlaceholders()',
'[class.mat-date-range-input-required]': 'required',
'[attr.id]': 'null',
'role': 'group',
'[attr.aria-labelledby]': '_getAriaLabelledby()',
'[attr.aria-describedby]': '_ariaDescribedBy',
// Used by the test harness to tie this input to its calendar. We can't depend on
// `aria-owns` for this, because it's only defined while the calendar is open.
'[attr.data-mat-calendar]': 'rangePicker ? rangePicker.id : null',
},
changeDetection: ChangeDetectionStrategy.OnPush,
encapsulation: ViewEncapsulation.None,
providers: [
{ provide: MatFormFieldControl, useExisting: MatDateRangeInput },
{ provide: MAT_DATE_RANGE_INPUT_PARENT, useExisting: MatDateRangeInput },
],
styles: [".mat-date-range-input{display:block;width:100%}.mat-date-range-input-container{display:flex;align-items:center}.mat-date-range-input-separator{transition:opacity 400ms 133.3333333333ms cubic-bezier(0.25, 0.8, 0.25, 1);margin:0 4px}.mat-date-range-input-separator-hidden{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;opacity:0;transition:none}.mat-date-range-input-inner{font:inherit;background:transparent;color:currentColor;border:none;outline:none;padding:0;margin:0;vertical-align:bottom;text-align:inherit;-webkit-appearance:none;width:100%}.mat-date-range-input-inner::-ms-clear,.mat-date-range-input-inner::-ms-reveal{display:none}.mat-date-range-input-inner:-moz-ui-invalid{box-shadow:none}.mat-date-range-input-inner::placeholder{transition:color 400ms 133.3333333333ms cubic-bezier(0.25, 0.8, 0.25, 1)}.mat-date-range-input-inner::-moz-placeholder{transition:color 400ms 133.3333333333ms cubic-bezier(0.25, 0.8, 0.25, 1)}.mat-date-range-input-inner::-webkit-input-placeholder{transition:color 400ms 133.3333333333ms cubic-bezier(0.25, 0.8, 0.25, 1)}.mat-date-range-input-inner:-ms-input-placeholder{transition:color 400ms 133.3333333333ms cubic-bezier(0.25, 0.8, 0.25, 1)}.mat-form-field-hide-placeholder .mat-date-range-input-inner::placeholder,.mat-date-range-input-hide-placeholders .mat-date-range-input-inner::placeholder{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:transparent !important;-webkit-text-fill-color:transparent;transition:none}.mat-form-field-hide-placeholder .mat-date-range-input-inner::-moz-placeholder,.mat-date-range-input-hide-placeholders .mat-date-range-input-inner::-moz-placeholder{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:transparent !important;-webkit-text-fill-color:transparent;transition:none}.mat-form-field-hide-placeholder .mat-date-range-input-inner::-webkit-input-placeholder,.mat-date-range-input-hide-placeholders .mat-date-range-input-inner::-webkit-input-placeholder{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:transparent !important;-webkit-text-fill-color:transparent;transition:none}.mat-form-field-hide-placeholder .mat-date-range-input-inner:-ms-input-placeholder,.mat-date-range-input-hide-placeholders .mat-date-range-input-inner:-ms-input-placeholder{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:transparent !important;-webkit-text-fill-color:transparent;transition:none}.mat-date-range-input-mirror{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;visibility:hidden;white-space:nowrap;display:inline-block;min-width:2px}.mat-date-range-input-start-wrapper{position:relative;overflow:hidden;max-width:calc(50% - 4px)}.mat-date-range-input-start-wrapper .mat-date-range-input-inner{position:absolute;top:0;left:0}.mat-date-range-input-end-wrapper{flex-grow:1;max-width:calc(50% - 4px)}.mat-form-field-type-mat-date-range-input .mat-form-field-infix{width:200px}\n"]
},] }
];
MatDateRangeInput.ctorParameters = () => [
{ type: ChangeDetectorRef },
{ type: ElementRef },
{ type: ControlContainer, decorators: [{ type: Optional }, { type: Self }] },
{ type: DateAdapter, decorators: [{ type: Optional }] },
{ type: MatFormField, decorators: [{ type: Optional }, { type: Inject, args: [MAT_FORM_FIELD,] }] }
];
MatDateRangeInput.propDecorators = {
rangePicker: [{ type: Input }],
required: [{ type: Input }],
dateFilter: [{ type: Input }],
min: [{ type: Input }],
max: [{ type: Input }],
disabled: [{ type: Input }],
separator: [{ type: Input }],
comparisonStart: [{ type: Input }],
comparisonEnd: [{ type: Input }],
_startInput: [{ type: ContentChild, args: [MatStartDate,] }],
_endInput: [{ type: ContentChild, args: [MatEndDate,] }]
};
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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  Component,\n  ChangeDetectionStrategy,\n  ViewEncapsulation,\n  Input,\n  Optional,\n  OnDestroy,\n  ContentChild,\n  AfterContentInit,\n  ChangeDetectorRef,\n  Self,\n  ElementRef,\n  Inject,\n  OnChanges,\n  SimpleChanges,\n} from '@angular/core';\nimport {MatFormFieldControl, MatFormField, MAT_FORM_FIELD} from '@angular/material/form-field';\nimport {ThemePalette, DateAdapter} from '@angular/material/core';\nimport {NgControl, ControlContainer} from '@angular/forms';\nimport {Subject, merge} from 'rxjs';\nimport {coerceBooleanProperty, BooleanInput} from '@angular/cdk/coercion';\nimport {\n  MatStartDate,\n  MatEndDate,\n  MatDateRangeInputParent,\n  MAT_DATE_RANGE_INPUT_PARENT,\n} from './date-range-input-parts';\nimport {MatDatepickerControl} from './datepicker-base';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {DateFilterFn, dateInputsHaveChanged} from './datepicker-input-base';\nimport {MatDateRangePicker, MatDateRangePickerInput} from './date-range-picker';\nimport {DateRange, MatDateSelectionModel} from './date-selection-model';\n\nlet nextUniqueId = 0;\n\n@Component({\n  selector: 'mat-date-range-input',\n  templateUrl: 'date-range-input.html',\n  styleUrls: ['date-range-input.css'],\n  exportAs: 'matDateRangeInput',\n  host: {\n    'class': 'mat-date-range-input',\n    '[class.mat-date-range-input-hide-placeholders]': '_shouldHidePlaceholders()',\n    '[class.mat-date-range-input-required]': 'required',\n    '[attr.id]': 'null',\n    'role': 'group',\n    '[attr.aria-labelledby]': '_getAriaLabelledby()',\n    '[attr.aria-describedby]': '_ariaDescribedBy',\n    // Used by the test harness to tie this input to its calendar. We can't depend on\n    // `aria-owns` for this, because it's only defined while the calendar is open.\n    '[attr.data-mat-calendar]': 'rangePicker ? rangePicker.id : null',\n  },\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  encapsulation: ViewEncapsulation.None,\n  providers: [\n    {provide: MatFormFieldControl, useExisting: MatDateRangeInput},\n    {provide: MAT_DATE_RANGE_INPUT_PARENT, useExisting: MatDateRangeInput},\n  ]\n})\nexport class MatDateRangeInput<D> implements MatFormFieldControl<DateRange<D>>,\n  MatDatepickerControl<D>, MatDateRangeInputParent<D>, MatDateRangePickerInput<D>,\n  AfterContentInit, OnChanges, OnDestroy {\n  /** Current value of the range input. */\n  get value() {\n    return this._model ? this._model.selection : null;\n  }\n\n  /** Unique ID for the input. */\n  id = `mat-date-range-input-${nextUniqueId++}`;\n\n  /** Whether the control is focused. */\n  focused = false;\n\n  /** Whether the control's label should float. */\n  get shouldLabelFloat(): boolean {\n    return this.focused || !this.empty;\n  }\n\n  /** Name of the form control. */\n  controlType = 'mat-date-range-input';\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * Set the placeholder attribute on `matStartDate` and `matEndDate`.\n   * @docs-private\n   */\n  get placeholder() {\n    const start = this._startInput?._getPlaceholder() || '';\n    const end = this._endInput?._getPlaceholder() || '';\n    return (start || end) ? `${start} ${this.separator} ${end}` : '';\n  }\n\n  /** The range picker that this input is associated with. */\n  @Input()\n  get rangePicker() { return this._rangePicker; }\n  set rangePicker(rangePicker: MatDateRangePicker<D>) {\n    if (rangePicker) {\n      this._model = rangePicker._registerInput(this);\n      this._rangePicker = rangePicker;\n      this._registerModel(this._model!);\n    }\n  }\n  private _rangePicker: MatDateRangePicker<D>;\n\n  /** Whether the input is required. */\n  @Input()\n  get required(): boolean { return !!this._required; }\n  set required(value: boolean) {\n    this._required = coerceBooleanProperty(value);\n  }\n  private _required: boolean;\n\n  /** Function that can be used to filter out dates within the date range picker. */\n  @Input()\n  get dateFilter() { return this._dateFilter; }\n  set dateFilter(value: DateFilterFn<D>) {\n    const start = this._startInput;\n    const end = this._endInput;\n    const wasMatchingStart = start && start._matchesFilter(start.value);\n    const wasMatchingEnd = end && end._matchesFilter(start.value);\n    this._dateFilter = value;\n\n    if (start && start._matchesFilter(start.value) !== wasMatchingStart) {\n      start._validatorOnChange();\n    }\n\n    if (end && end._matchesFilter(end.value) !== wasMatchingEnd) {\n      end._validatorOnChange();\n    }\n  }\n  private _dateFilter: DateFilterFn<D>;\n\n  /** The minimum valid date. */\n  @Input()\n  get min(): D | null { return this._min; }\n  set min(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._min)) {\n      this._min = validValue;\n      this._revalidate();\n    }\n  }\n  private _min: D | null;\n\n  /** The maximum valid date. */\n  @Input()\n  get max(): D | null { return this._max; }\n  set max(value: D | null) {\n    const validValue = this._dateAdapter.getValidDateOrNull(this._dateAdapter.deserialize(value));\n\n    if (!this._dateAdapter.sameDate(validValue, this._max)) {\n      this._max = validValue;\n      this._revalidate();\n    }\n  }\n  private _max: D | null;\n\n  /** Whether the input is disabled. */\n  @Input()\n  get disabled(): boolean {\n    return (this._startInput && this._endInput) ?\n      (this._startInput.disabled && this._endInput.disabled) :\n      this._groupDisabled;\n  }\n  set disabled(value: boolean) {\n    const newValue = coerceBooleanProperty(value);\n\n    if (newValue !== this._groupDisabled) {\n      this._groupDisabled = newValue;\n      this.stateChanges.next(undefined);\n    }\n  }\n  _groupDisabled = false;\n\n  /** Whether the input is in an error state. */\n  get errorState(): boolean {\n    if (this._startInput && this._endInput) {\n      return this._startInput.errorState || this._endInput.errorState;\n    }\n\n    return false;\n  }\n\n  /** Whether the datepicker input is empty. */\n  get empty(): boolean {\n    const startEmpty = this._startInput ? this._startInput.isEmpty() : false;\n    const endEmpty = this._endInput ? this._endInput.isEmpty() : false;\n    return startEmpty && endEmpty;\n  }\n\n  /** Value for the `aria-describedby` attribute of the inputs. */\n  _ariaDescribedBy: string | null = null;\n\n  /** Date selection model currently registered with the input. */\n  private _model: MatDateSelectionModel<DateRange<D>> | undefined;\n\n  /** Separator text to be shown between the inputs. */\n  @Input() separator = '–';\n\n  /** Start of the comparison range that should be shown in the calendar. */\n  @Input() comparisonStart: D | null = null;\n\n  /** End of the comparison range that should be shown in the calendar. */\n  @Input() comparisonEnd: D | null = null;\n\n  @ContentChild(MatStartDate) _startInput: MatStartDate<D>;\n  @ContentChild(MatEndDate) _endInput: MatEndDate<D>;\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * TODO(crisbeto): change type to `AbstractControlDirective` after #18206 lands.\n   * @docs-private\n   */\n  ngControl: NgControl | null;\n\n  /** Emits when the input's state has changed. */\n  stateChanges = new Subject<void>();\n\n  constructor(\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _elementRef: ElementRef<HTMLElement>,\n    @Optional() @Self() control: ControlContainer,\n    @Optional() private _dateAdapter: DateAdapter<D>,\n    @Optional() @Inject(MAT_FORM_FIELD) private _formField?: MatFormField) {\n\n    if (!_dateAdapter && (typeof ngDevMode === 'undefined' || ngDevMode)) {\n      throw createMissingDateImplError('DateAdapter');\n    }\n\n    // TODO(crisbeto): remove `as any` after #18206 lands.\n    this.ngControl = control as any;\n  }\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * @docs-private\n   */\n  setDescribedByIds(ids: string[]): void {\n    this._ariaDescribedBy = ids.length ? ids.join(' ') : null;\n  }\n\n  /**\n   * Implemented as a part of `MatFormFieldControl`.\n   * @docs-private\n   */\n  onContainerClick(): void {\n    if (!this.focused && !this.disabled) {\n      if (!this._model || !this._model.selection.start) {\n        this._startInput.focus();\n      } else {\n        this._endInput.focus();\n      }\n    }\n  }\n\n  ngAfterContentInit() {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      if (!this._startInput) {\n        throw Error('mat-date-range-input must contain a matStartDate input');\n      }\n\n      if (!this._endInput) {\n        throw Error('mat-date-range-input must contain a matEndDate input');\n      }\n    }\n\n    if (this._model) {\n      this._registerModel(this._model);\n    }\n\n    // We don't need to unsubscribe from this, because we\n    // know that the input streams will be completed on destroy.\n    merge(this._startInput.stateChanges, this._endInput.stateChanges).subscribe(() => {\n      this.stateChanges.next(undefined);\n    });\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (dateInputsHaveChanged(changes, this._dateAdapter)) {\n      this.stateChanges.next(undefined);\n    }\n  }\n\n  ngOnDestroy() {\n    this.stateChanges.complete();\n  }\n\n  /** Gets the date at which the calendar should start. */\n  getStartValue(): D | null {\n    return this.value ? this.value.start : null;\n  }\n\n  /** Gets the input's theme palette. */\n  getThemePalette(): ThemePalette {\n    return this._formField ? this._formField.color : undefined;\n  }\n\n  /** Gets the element to which the calendar overlay should be attached. */\n  getConnectedOverlayOrigin(): ElementRef {\n    return this._formField ? this._formField.getConnectedOverlayOrigin() : this._elementRef;\n  }\n\n  /** Gets the value that is used to mirror the state input. */\n  _getInputMirrorValue() {\n    return this._startInput ? this._startInput.getMirrorValue() : '';\n  }\n\n  /** Whether the input placeholders should be hidden. */\n  _shouldHidePlaceholders() {\n    return this._startInput ? !this._startInput.isEmpty() : false;\n  }\n\n  /** Handles the value in one of the child inputs changing. */\n  _handleChildValueChange() {\n    this.stateChanges.next(undefined);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Opens the date range picker associated with the input. */\n  _openDatepicker() {\n    if (this._rangePicker) {\n      this._rangePicker.open();\n    }\n  }\n\n  /** Whether the separate text should be hidden. */\n  _shouldHideSeparator() {\n    return (!this._formField || this._formField._hideControlPlaceholder()) && this.empty;\n  }\n\n  /** Gets the value for the `aria-labelledby` attribute of the inputs. */\n  _getAriaLabelledby() {\n    const formField = this._formField;\n    return formField && formField._hasFloatingLabel() ? formField._labelId : null;\n  }\n\n  /** Re-runs the validators on the start/end inputs. */\n  private _revalidate() {\n    if (this._startInput) {\n      this._startInput._validatorOnChange();\n    }\n\n    if (this._endInput) {\n      this._endInput._validatorOnChange();\n    }\n  }\n\n  /** Registers the current date selection model with the start/end inputs. */\n  private _registerModel(model: MatDateSelectionModel<DateRange<D>>) {\n    if (this._startInput) {\n      this._startInput._registerModel(model);\n    }\n\n    if (this._endInput) {\n      this._endInput._registerModel(model);\n    }\n  }\n\n  static ngAcceptInputType_required: BooleanInput;\n  static ngAcceptInputType_disabled: BooleanInput;\n}\n"]}