@angular/material
Version:
Angular Material
272 lines • 43.2 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 { DOWN_ARROW, END, ENTER, HOME, LEFT_ARROW, PAGE_DOWN, PAGE_UP, RIGHT_ARROW, UP_ARROW, SPACE, } from '@angular/cdk/keycodes';
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, EventEmitter, Inject, Input, Optional, Output, ViewEncapsulation, ViewChild, } from '@angular/core';
import { DateAdapter, MAT_DATE_FORMATS } from '@angular/material/core';
import { Directionality } from '@angular/cdk/bidi';
import { MatCalendarBody, MatCalendarCell } from './calendar-body';
import { createMissingDateImplError } from './datepicker-errors';
import { Subscription } from 'rxjs';
import { startWith } from 'rxjs/operators';
var DAYS_PER_WEEK = 7;
/**
* An internal component used to display a single month in the datepicker.
* @docs-private
*/
var MatMonthView = /** @class */ (function () {
function MatMonthView(_changeDetectorRef, _dateFormats, _dateAdapter, _dir) {
this._changeDetectorRef = _changeDetectorRef;
this._dateFormats = _dateFormats;
this._dateAdapter = _dateAdapter;
this._dir = _dir;
this._rerenderSubscription = Subscription.EMPTY;
/** Emits when a new date is selected. */
this.selectedChange = new EventEmitter();
/** Emits when any date is selected. */
this._userSelection = new EventEmitter();
/** Emits when any date is activated. */
this.activeDateChange = new EventEmitter();
if (!this._dateAdapter) {
throw createMissingDateImplError('DateAdapter');
}
if (!this._dateFormats) {
throw createMissingDateImplError('MAT_DATE_FORMATS');
}
this._activeDate = this._dateAdapter.today();
}
Object.defineProperty(MatMonthView.prototype, "activeDate", {
/**
* The date to display in this month view (everything other than the month and year is ignored).
*/
get: function () { return this._activeDate; },
set: function (value) {
var oldActiveDate = this._activeDate;
var validDate = this._getValidDateOrNull(this._dateAdapter.deserialize(value)) || this._dateAdapter.today();
this._activeDate = this._dateAdapter.clampDate(validDate, this.minDate, this.maxDate);
if (!this._hasSameMonthAndYear(oldActiveDate, this._activeDate)) {
this._init();
}
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatMonthView.prototype, "selected", {
/** The currently selected date. */
get: function () { return this._selected; },
set: function (value) {
this._selected = this._getValidDateOrNull(this._dateAdapter.deserialize(value));
this._selectedDate = this._getDateInCurrentMonth(this._selected);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatMonthView.prototype, "minDate", {
/** The minimum selectable date. */
get: function () { return this._minDate; },
set: function (value) {
this._minDate = this._getValidDateOrNull(this._dateAdapter.deserialize(value));
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatMonthView.prototype, "maxDate", {
/** The maximum selectable date. */
get: function () { return this._maxDate; },
set: function (value) {
this._maxDate = this._getValidDateOrNull(this._dateAdapter.deserialize(value));
},
enumerable: true,
configurable: true
});
MatMonthView.prototype.ngAfterContentInit = function () {
var _this = this;
this._rerenderSubscription = this._dateAdapter.localeChanges
.pipe(startWith(null))
.subscribe(function () { return _this._init(); });
};
MatMonthView.prototype.ngOnDestroy = function () {
this._rerenderSubscription.unsubscribe();
};
/** Handles when a new date is selected. */
MatMonthView.prototype._dateSelected = function (date) {
if (this._selectedDate != date) {
var selectedYear = this._dateAdapter.getYear(this.activeDate);
var selectedMonth = this._dateAdapter.getMonth(this.activeDate);
var selectedDate = this._dateAdapter.createDate(selectedYear, selectedMonth, date);
this.selectedChange.emit(selectedDate);
}
this._userSelection.emit();
};
/** Handles keydown events on the calendar body when calendar is in month view. */
MatMonthView.prototype._handleCalendarBodyKeydown = function (event) {
// TODO(mmalerba): We currently allow keyboard navigation to disabled dates, but just prevent
// disabled ones from being selected. This may not be ideal, we should look into whether
// navigation should skip over disabled dates, and if so, how to implement that efficiently.
var oldActiveDate = this._activeDate;
var isRtl = this._isRtl();
switch (event.keyCode) {
case LEFT_ARROW:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? 1 : -1);
break;
case RIGHT_ARROW:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? -1 : 1);
break;
case UP_ARROW:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, -7);
break;
case DOWN_ARROW:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, 7);
break;
case HOME:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, 1 - this._dateAdapter.getDate(this._activeDate));
break;
case END:
this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, (this._dateAdapter.getNumDaysInMonth(this._activeDate) -
this._dateAdapter.getDate(this._activeDate)));
break;
case PAGE_UP:
this.activeDate = event.altKey ?
this._dateAdapter.addCalendarYears(this._activeDate, -1) :
this._dateAdapter.addCalendarMonths(this._activeDate, -1);
break;
case PAGE_DOWN:
this.activeDate = event.altKey ?
this._dateAdapter.addCalendarYears(this._activeDate, 1) :
this._dateAdapter.addCalendarMonths(this._activeDate, 1);
break;
case ENTER:
case SPACE:
if (!this.dateFilter || this.dateFilter(this._activeDate)) {
this._dateSelected(this._dateAdapter.getDate(this._activeDate));
this._userSelection.emit();
// Prevent unexpected default actions such as form submission.
event.preventDefault();
}
return;
default:
// Don't prevent default or focus active cell on keys that we don't explicitly handle.
return;
}
if (this._dateAdapter.compareDate(oldActiveDate, this.activeDate)) {
this.activeDateChange.emit(this.activeDate);
}
this._focusActiveCell();
// Prevent unexpected default actions such as form submission.
event.preventDefault();
};
/** Initializes this month view. */
MatMonthView.prototype._init = function () {
this._selectedDate = this._getDateInCurrentMonth(this.selected);
this._todayDate = this._getDateInCurrentMonth(this._dateAdapter.today());
this._monthLabel =
this._dateAdapter.getMonthNames('short')[this._dateAdapter.getMonth(this.activeDate)]
.toLocaleUpperCase();
var firstOfMonth = this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate), this._dateAdapter.getMonth(this.activeDate), 1);
this._firstWeekOffset =
(DAYS_PER_WEEK + this._dateAdapter.getDayOfWeek(firstOfMonth) -
this._dateAdapter.getFirstDayOfWeek()) % DAYS_PER_WEEK;
this._initWeekdays();
this._createWeekCells();
this._changeDetectorRef.markForCheck();
};
/** Focuses the active cell after the microtask queue is empty. */
MatMonthView.prototype._focusActiveCell = function () {
this._matCalendarBody._focusActiveCell();
};
/** Initializes the weekdays. */
MatMonthView.prototype._initWeekdays = function () {
var firstDayOfWeek = this._dateAdapter.getFirstDayOfWeek();
var narrowWeekdays = this._dateAdapter.getDayOfWeekNames('narrow');
var longWeekdays = this._dateAdapter.getDayOfWeekNames('long');
// Rotate the labels for days of the week based on the configured first day of the week.
var weekdays = longWeekdays.map(function (long, i) {
return { long: long, narrow: narrowWeekdays[i] };
});
this._weekdays = weekdays.slice(firstDayOfWeek).concat(weekdays.slice(0, firstDayOfWeek));
};
/** Creates MatCalendarCells for the dates in this month. */
MatMonthView.prototype._createWeekCells = function () {
var daysInMonth = this._dateAdapter.getNumDaysInMonth(this.activeDate);
var dateNames = this._dateAdapter.getDateNames();
this._weeks = [[]];
for (var i = 0, cell = this._firstWeekOffset; i < daysInMonth; i++, cell++) {
if (cell == DAYS_PER_WEEK) {
this._weeks.push([]);
cell = 0;
}
var date = this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate), this._dateAdapter.getMonth(this.activeDate), i + 1);
var enabled = this._shouldEnableDate(date);
var ariaLabel = this._dateAdapter.format(date, this._dateFormats.display.dateA11yLabel);
var cellClasses = this.dateClass ? this.dateClass(date) : undefined;
this._weeks[this._weeks.length - 1]
.push(new MatCalendarCell(i + 1, dateNames[i], ariaLabel, enabled, cellClasses));
}
};
/** Date filter for the month */
MatMonthView.prototype._shouldEnableDate = function (date) {
return !!date &&
(!this.dateFilter || this.dateFilter(date)) &&
(!this.minDate || this._dateAdapter.compareDate(date, this.minDate) >= 0) &&
(!this.maxDate || this._dateAdapter.compareDate(date, this.maxDate) <= 0);
};
/**
* Gets the date in this month that the given Date falls on.
* Returns null if the given Date is in another month.
*/
MatMonthView.prototype._getDateInCurrentMonth = function (date) {
return date && this._hasSameMonthAndYear(date, this.activeDate) ?
this._dateAdapter.getDate(date) : null;
};
/** Checks whether the 2 dates are non-null and fall within the same month of the same year. */
MatMonthView.prototype._hasSameMonthAndYear = function (d1, d2) {
return !!(d1 && d2 && this._dateAdapter.getMonth(d1) == this._dateAdapter.getMonth(d2) &&
this._dateAdapter.getYear(d1) == this._dateAdapter.getYear(d2));
};
/**
* @param obj The object to check.
* @returns The given object if it is both a date instance and valid, otherwise null.
*/
MatMonthView.prototype._getValidDateOrNull = function (obj) {
return (this._dateAdapter.isDateInstance(obj) && this._dateAdapter.isValid(obj)) ? obj : null;
};
/** Determines whether the user has the RTL layout direction. */
MatMonthView.prototype._isRtl = function () {
return this._dir && this._dir.value === 'rtl';
};
MatMonthView.decorators = [
{ type: Component, args: [{
selector: 'mat-month-view',
template: "<table class=\"mat-calendar-table\" role=\"presentation\">\n <thead class=\"mat-calendar-table-header\">\n <tr>\n <th scope=\"col\" *ngFor=\"let day of _weekdays\" [attr.aria-label]=\"day.long\">{{day.narrow}}</th>\n </tr>\n <tr><th class=\"mat-calendar-table-header-divider\" colspan=\"7\" aria-hidden=\"true\"></th></tr>\n </thead>\n <tbody mat-calendar-body\n [label]=\"_monthLabel\"\n [rows]=\"_weeks\"\n [todayValue]=\"_todayDate!\"\n [selectedValue]=\"_selectedDate!\"\n [labelMinRequiredCells]=\"3\"\n [activeCell]=\"_dateAdapter.getDate(activeDate) - 1\"\n (selectedValueChange)=\"_dateSelected($event)\"\n (keydown)=\"_handleCalendarBodyKeydown($event)\">\n </tbody>\n</table>\n",
exportAs: 'matMonthView',
encapsulation: ViewEncapsulation.None,
changeDetection: ChangeDetectionStrategy.OnPush
}] }
];
/** @nocollapse */
MatMonthView.ctorParameters = function () { return [
{ type: ChangeDetectorRef },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_DATE_FORMATS,] }] },
{ type: DateAdapter, decorators: [{ type: Optional }] },
{ type: Directionality, decorators: [{ type: Optional }] }
]; };
MatMonthView.propDecorators = {
activeDate: [{ type: Input }],
selected: [{ type: Input }],
minDate: [{ type: Input }],
maxDate: [{ type: Input }],
dateFilter: [{ type: Input }],
dateClass: [{ type: Input }],
selectedChange: [{ type: Output }],
_userSelection: [{ type: Output }],
activeDateChange: [{ type: Output }],
_matCalendarBody: [{ type: ViewChild, args: [MatCalendarBody,] }]
};
return MatMonthView;
}());
export { MatMonthView };
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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  DOWN_ARROW,\n  END,\n  ENTER,\n  HOME,\n  LEFT_ARROW,\n  PAGE_DOWN,\n  PAGE_UP,\n  RIGHT_ARROW,\n  UP_ARROW,\n  SPACE,\n} from '@angular/cdk/keycodes';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  EventEmitter,\n  Inject,\n  Input,\n  Optional,\n  Output,\n  ViewEncapsulation,\n  ViewChild,\n  OnDestroy,\n} from '@angular/core';\nimport {DateAdapter, MAT_DATE_FORMATS, MatDateFormats} from '@angular/material/core';\nimport {Directionality} from '@angular/cdk/bidi';\nimport {MatCalendarBody, MatCalendarCell, MatCalendarCellCssClasses} from './calendar-body';\nimport {createMissingDateImplError} from './datepicker-errors';\nimport {Subscription} from 'rxjs';\nimport {startWith} from 'rxjs/operators';\n\n\nconst DAYS_PER_WEEK = 7;\n\n\n/**\n * An internal component used to display a single month in the datepicker.\n * @docs-private\n */\n@Component({\n  selector: 'mat-month-view',\n  templateUrl: 'month-view.html',\n  exportAs: 'matMonthView',\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class MatMonthView<D> implements AfterContentInit, OnDestroy {\n  private _rerenderSubscription = Subscription.EMPTY;\n\n  /**\n   * The date to display in this month view (everything other than the month and year is ignored).\n   */\n  @Input()\n  get activeDate(): D { return this._activeDate; }\n  set activeDate(value: D) {\n    const oldActiveDate = this._activeDate;\n    const validDate =\n        this._getValidDateOrNull(this._dateAdapter.deserialize(value)) || this._dateAdapter.today();\n    this._activeDate = this._dateAdapter.clampDate(validDate, this.minDate, this.maxDate);\n    if (!this._hasSameMonthAndYear(oldActiveDate, this._activeDate)) {\n      this._init();\n    }\n  }\n  private _activeDate: D;\n\n  /** The currently selected date. */\n  @Input()\n  get selected(): D | null { return this._selected; }\n  set selected(value: D | null) {\n    this._selected = this._getValidDateOrNull(this._dateAdapter.deserialize(value));\n    this._selectedDate = this._getDateInCurrentMonth(this._selected);\n  }\n  private _selected: D | null;\n\n  /** The minimum selectable date. */\n  @Input()\n  get minDate(): D | null { return this._minDate; }\n  set minDate(value: D | null) {\n    this._minDate = this._getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _minDate: D | null;\n\n  /** The maximum selectable date. */\n  @Input()\n  get maxDate(): D | null { return this._maxDate; }\n  set maxDate(value: D | null) {\n    this._maxDate = this._getValidDateOrNull(this._dateAdapter.deserialize(value));\n  }\n  private _maxDate: D | null;\n\n  /** Function used to filter which dates are selectable. */\n  @Input() dateFilter: (date: D) => boolean;\n\n  /** Function that can be used to add custom CSS classes to dates. */\n  @Input() dateClass: (date: D) => MatCalendarCellCssClasses;\n\n  /** Emits when a new date is selected. */\n  @Output() readonly selectedChange: EventEmitter<D | null> = new EventEmitter<D | null>();\n\n  /** Emits when any date is selected. */\n  @Output() readonly _userSelection: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Emits when any date is activated. */\n  @Output() readonly activeDateChange: EventEmitter<D> = new EventEmitter<D>();\n\n  /** The body of calendar table */\n  @ViewChild(MatCalendarBody) _matCalendarBody: MatCalendarBody;\n\n  /** The label for this month (e.g. \"January 2017\"). */\n  _monthLabel: string;\n\n  /** Grid of calendar cells representing the dates of the month. */\n  _weeks: MatCalendarCell[][];\n\n  /** The number of blank cells in the first row before the 1st of the month. */\n  _firstWeekOffset: number;\n\n  /**\n   * The date of the month that the currently selected Date falls on.\n   * Null if the currently selected Date is in another month.\n   */\n  _selectedDate: number | null;\n\n  /** The date of the month that today falls on. Null if today is in another month. */\n  _todayDate: number | null;\n\n  /** The names of the weekdays. */\n  _weekdays: {long: string, narrow: string}[];\n\n  constructor(private _changeDetectorRef: ChangeDetectorRef,\n              @Optional() @Inject(MAT_DATE_FORMATS) private _dateFormats: MatDateFormats,\n              @Optional() public _dateAdapter: DateAdapter<D>,\n              @Optional() private _dir?: Directionality) {\n    if (!this._dateAdapter) {\n      throw createMissingDateImplError('DateAdapter');\n    }\n    if (!this._dateFormats) {\n      throw createMissingDateImplError('MAT_DATE_FORMATS');\n    }\n\n    this._activeDate = this._dateAdapter.today();\n  }\n\n  ngAfterContentInit() {\n    this._rerenderSubscription = this._dateAdapter.localeChanges\n      .pipe(startWith(null))\n      .subscribe(() => this._init());\n  }\n\n  ngOnDestroy() {\n    this._rerenderSubscription.unsubscribe();\n  }\n\n  /** Handles when a new date is selected. */\n  _dateSelected(date: number) {\n    if (this._selectedDate != date) {\n      const selectedYear = this._dateAdapter.getYear(this.activeDate);\n      const selectedMonth = this._dateAdapter.getMonth(this.activeDate);\n      const selectedDate = this._dateAdapter.createDate(selectedYear, selectedMonth, date);\n\n      this.selectedChange.emit(selectedDate);\n    }\n\n    this._userSelection.emit();\n  }\n\n  /** Handles keydown events on the calendar body when calendar is in month view. */\n  _handleCalendarBodyKeydown(event: KeyboardEvent): void {\n    // TODO(mmalerba): We currently allow keyboard navigation to disabled dates, but just prevent\n    // disabled ones from being selected. This may not be ideal, we should look into whether\n    // navigation should skip over disabled dates, and if so, how to implement that efficiently.\n\n    const oldActiveDate = this._activeDate;\n    const isRtl = this._isRtl();\n\n    switch (event.keyCode) {\n      case LEFT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? 1 : -1);\n        break;\n      case RIGHT_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, isRtl ? -1 : 1);\n        break;\n      case UP_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, -7);\n        break;\n      case DOWN_ARROW:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate, 7);\n        break;\n      case HOME:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate,\n            1 - this._dateAdapter.getDate(this._activeDate));\n        break;\n      case END:\n        this.activeDate = this._dateAdapter.addCalendarDays(this._activeDate,\n            (this._dateAdapter.getNumDaysInMonth(this._activeDate) -\n              this._dateAdapter.getDate(this._activeDate)));\n        break;\n      case PAGE_UP:\n        this.activeDate = event.altKey ?\n            this._dateAdapter.addCalendarYears(this._activeDate, -1) :\n            this._dateAdapter.addCalendarMonths(this._activeDate, -1);\n        break;\n      case PAGE_DOWN:\n        this.activeDate = event.altKey ?\n            this._dateAdapter.addCalendarYears(this._activeDate, 1) :\n            this._dateAdapter.addCalendarMonths(this._activeDate, 1);\n        break;\n      case ENTER:\n      case SPACE:\n        if (!this.dateFilter || this.dateFilter(this._activeDate)) {\n          this._dateSelected(this._dateAdapter.getDate(this._activeDate));\n          this._userSelection.emit();\n          // Prevent unexpected default actions such as form submission.\n          event.preventDefault();\n        }\n        return;\n      default:\n        // Don't prevent default or focus active cell on keys that we don't explicitly handle.\n        return;\n    }\n\n    if (this._dateAdapter.compareDate(oldActiveDate, this.activeDate)) {\n      this.activeDateChange.emit(this.activeDate);\n    }\n\n    this._focusActiveCell();\n    // Prevent unexpected default actions such as form submission.\n    event.preventDefault();\n  }\n\n  /** Initializes this month view. */\n  _init() {\n    this._selectedDate = this._getDateInCurrentMonth(this.selected);\n    this._todayDate = this._getDateInCurrentMonth(this._dateAdapter.today());\n    this._monthLabel =\n        this._dateAdapter.getMonthNames('short')[this._dateAdapter.getMonth(this.activeDate)]\n            .toLocaleUpperCase();\n\n    let firstOfMonth = this._dateAdapter.createDate(this._dateAdapter.getYear(this.activeDate),\n        this._dateAdapter.getMonth(this.activeDate), 1);\n    this._firstWeekOffset =\n        (DAYS_PER_WEEK + this._dateAdapter.getDayOfWeek(firstOfMonth) -\n         this._dateAdapter.getFirstDayOfWeek()) % DAYS_PER_WEEK;\n\n    this._initWeekdays();\n    this._createWeekCells();\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Focuses the active cell after the microtask queue is empty. */\n  _focusActiveCell() {\n    this._matCalendarBody._focusActiveCell();\n  }\n\n  /** Initializes the weekdays. */\n  private _initWeekdays() {\n    const firstDayOfWeek = this._dateAdapter.getFirstDayOfWeek();\n    const narrowWeekdays = this._dateAdapter.getDayOfWeekNames('narrow');\n    const longWeekdays = this._dateAdapter.getDayOfWeekNames('long');\n\n    // Rotate the labels for days of the week based on the configured first day of the week.\n    let weekdays = longWeekdays.map((long, i) => {\n        return {long, narrow: narrowWeekdays[i]};\n    });\n    this._weekdays = weekdays.slice(firstDayOfWeek).concat(weekdays.slice(0, firstDayOfWeek));\n  }\n\n  /** Creates MatCalendarCells for the dates in this month. */\n  private _createWeekCells() {\n    const daysInMonth = this._dateAdapter.getNumDaysInMonth(this.activeDate);\n    const dateNames = this._dateAdapter.getDateNames();\n    this._weeks = [[]];\n    for (let i = 0, cell = this._firstWeekOffset; i < daysInMonth; i++, cell++) {\n      if (cell == DAYS_PER_WEEK) {\n        this._weeks.push([]);\n        cell = 0;\n      }\n      const date = this._dateAdapter.createDate(\n            this._dateAdapter.getYear(this.activeDate),\n            this._dateAdapter.getMonth(this.activeDate), i + 1);\n      const enabled = this._shouldEnableDate(date);\n      const ariaLabel = this._dateAdapter.format(date, this._dateFormats.display.dateA11yLabel);\n      const cellClasses = this.dateClass ? this.dateClass(date) : undefined;\n\n      this._weeks[this._weeks.length - 1]\n          .push(new MatCalendarCell(i + 1, dateNames[i], ariaLabel, enabled, cellClasses));\n    }\n  }\n\n  /** Date filter for the month */\n  private _shouldEnableDate(date: D): boolean {\n    return !!date &&\n        (!this.dateFilter || this.dateFilter(date)) &&\n        (!this.minDate || this._dateAdapter.compareDate(date, this.minDate) >= 0) &&\n        (!this.maxDate || this._dateAdapter.compareDate(date, this.maxDate) <= 0);\n  }\n\n  /**\n   * Gets the date in this month that the given Date falls on.\n   * Returns null if the given Date is in another month.\n   */\n  private _getDateInCurrentMonth(date: D | null): number | null {\n    return date && this._hasSameMonthAndYear(date, this.activeDate) ?\n        this._dateAdapter.getDate(date) : null;\n  }\n\n  /** Checks whether the 2 dates are non-null and fall within the same month of the same year. */\n  private _hasSameMonthAndYear(d1: D | null, d2: D | null): boolean {\n    return !!(d1 && d2 && this._dateAdapter.getMonth(d1) == this._dateAdapter.getMonth(d2) &&\n              this._dateAdapter.getYear(d1) == this._dateAdapter.getYear(d2));\n  }\n\n  /**\n   * @param obj The object to check.\n   * @returns The given object if it is both a date instance and valid, otherwise null.\n   */\n  private _getValidDateOrNull(obj: any): D | null {\n    return (this._dateAdapter.isDateInstance(obj) && this._dateAdapter.isValid(obj)) ? obj : null;\n  }\n\n  /** Determines whether the user has the RTL layout direction. */\n  private _isRtl() {\n    return this._dir && this._dir.value === 'rtl';\n  }\n}\n"]}