refactor(datepicker): replace SimpleDate & CalendarLocale with DateAd…

…apter (#4189)

* rename test file to match the file its testing

* remove SimpleDate and CalendarLocale

* switch MdMonthView to use DateAdapter

* swtich MdYearView to use DateAdapter

* switch MdCalendar to use DateAdapter

* switch MdDatepicker to use DateAdapter

* switch MdDatepickerInput and MdDatepickerToggle to use DateAdapter

* fix demo

* fix some small bugs

* fix tests

* alias months in tests

* address comments and remove overflow on createDate

* s/l10n/intl

src/demo-app/datepicker/datepicker-demo.ts

@@ -1,5 +1,4 @@
 import {Component} from '@angular/core';
-import {SimpleDate} from '@angular/material';
 
 
 @Component({
@@ -9,8 +8,9 @@ import {SimpleDate} from '@angular/material';
   styleUrls: ['datepicker-demo.css'],
 })
 export class DatepickerDemo {
-  date: SimpleDate;
+  date: Date;
   touch = false;
-  dateFilter = (date: SimpleDate) => !this._blacklistedMonths.has(date.month) && date.date % 2 == 0;
+  dateFilter =
+      (date: Date) => !this._blacklistedMonths.has(date.getMonth()) && date.getDate() % 2 == 0
   private _blacklistedMonths = new Set([2, 3]);
 }

src/lib/core/datetime/date-adapter.ts

@@ -73,6 +73,13 @@ export abstract class DateAdapter<D> {
    */
   abstract getFirstDayOfWeek(): number;
 
+  /**
+   * Gets the number of days in the month of the given date.
+   * @param date The date whose month should be checked.
+   * @returns The number of days in the month of the given date.
+   */
+  abstract getNumDaysInMonth(date: D): number;
+
   /**
    * Gets a set of default formats to use for displaying the date in different contexts.
    * @returns An object with the following default formats:
@@ -88,13 +95,12 @@ export abstract class DateAdapter<D> {
   abstract clone(date: D): D;
 
   /**
-   * Creates a date with the given year, month, and date.
+   * Creates a date with the given year, month, and date. Does not allow over/under-flow of the
+   * month and date.
    * @param year The full year of the date. (e.g. 89 means the year 89, not the year 1989).
-   * @param month The month of the date (0-indexed, 0 = January). If `month` is less than 0 or
-   *     greater than 11, it should roll into the previous / next year.
-   * @param date The date of month of the date. If `date` is less than 1 or greater than the number
-   *     of days in the `month`, it should roll into the previous / next month.
-   * @returns The new date.
+   * @param month The month of the date (0-indexed, 0 = January). Must be an integer 0 - 11.
+   * @param date The date of month of the date. Must be an integer 1 - length of the given month.
+   * @returns The new date, or null if invalid.
    */
   abstract createDate(year: number, month: number, date: number): D;
 

src/lib/core/datetime/index.ts

@@ -1,14 +1,13 @@
 import {NgModule} from '@angular/core';
-import {DefaultCalendarLocale, CalendarLocale} from './calendar-locale';
+import {DateAdapter} from './date-adapter';
+import {NativeDateAdapter} from './native-date-adapter';
 
 
-export * from './calendar-locale';
 export * from './date-adapter';
-export * from './simple-date';
 export * from './native-date-adapter';
 
 
 @NgModule({
-  providers: [{provide: CalendarLocale, useClass: DefaultCalendarLocale}],
+  providers: [{provide: DateAdapter, useClass: NativeDateAdapter}],
 })
 export class DatetimeModule {}