Kotlinx datetime CalendarModel (support date picker on darwin and web) (

#717)

implement Calender on all platforms
Co-authored-by: Oleksandr Karpovich <a.n.karpovich@gmail.com>
Co-authored-by: dima.avdeev <dima.avdeev@jetbrains.com>

compose/material3/material3/build.gradle

@@ -121,6 +121,9 @@ if(AndroidXComposePlugin.isMultiplatformEnabled(project)) {
 
             skikoMain {
                 dependsOn(commonMain)
+                dependencies {
+                    implementation(libs.datetime)
+                }
             }
 
             desktopMain.dependsOn(skikoMain)
@@ -160,11 +163,31 @@ if(AndroidXComposePlugin.isMultiplatformEnabled(project)) {
                 implementation(libs.testUiautomator)
             }
 
-            desktopTest.dependencies {
-                implementation(project(":compose:ui:ui-test-junit4"))
-                implementation(libs.truth)
-                implementation(libs.junit)
-                implementation(libs.skikoCurrentOs)
+            skikoTest.dependencies {
+                implementation(libs.kotlinTest)
+            }
+
+            desktopTest {
+                dependsOn(skikoTest)
+
+                dependencies {
+                    implementation(project(":compose:ui:ui-test-junit4"))
+                    implementation(libs.truth)
+                    implementation(libs.junit)
+                    implementation(libs.skikoCurrentOs)
+                }
+            }
+
+            jsWasmTest {
+                dependsOn(skikoTest)
+            }
+
+            jsTest{
+                dependsOn(jsWasmTest)
+            }
+
+            uikitTest {
+                dependsOn(skikoTest)
             }
 
             configureEach {

compose/material3/material3/src/uikitMain/kotlin/androidx/compose/material3/Actual.uikit.kt → compose/material3/material3/src/darwinMain/kotlin/androidx/compose/material3/Actual.darwin.kt

@@ -19,13 +19,7 @@ package androidx.compose.material3
 import platform.Foundation.NSLocale
 import platform.Foundation.currentLocale
 
-/**
- * Represents a Locale for the calendar. This locale will be used when formatting dates, determining
- * the input format, and more.
- */
+
 actual typealias CalendarLocale = NSLocale
 
-/**
- * Returns the default [CalendarLocale].
- */
 internal actual fun defaultLocale(): CalendarLocale = NSLocale.currentLocale()

compose/material3/material3/src/darwinMain/kotlin/androidx/compose/material3/PlatformDateFormat.darwin.kt

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.compose.material3
+
+import kotlinx.datetime.Instant
+import kotlinx.datetime.TimeZone
+import kotlinx.datetime.toNSTimeZone
+import platform.Foundation.NSCalendar
+import platform.Foundation.NSDate
+import platform.Foundation.NSDateFormatter
+import platform.Foundation.NSDateFormatterShortStyle
+import platform.Foundation.NSLocale
+import platform.Foundation.NSTimeZone
+import platform.Foundation.currentLocale
+import platform.Foundation.dateWithTimeIntervalSince1970
+import platform.Foundation.timeIntervalSince1970
+
+internal actual object PlatformDateFormat {
+
+    actual val firstDayOfWeek: Int
+        get() = firstDayOfWeek()
+
+    actual fun formatWithPattern(
+        utcTimeMillis: Long,
+        pattern: String,
+        locale: CalendarLocale
+    ): String {
+
+        val nsDate = NSDate.dateWithTimeIntervalSince1970(utcTimeMillis / 1000.0)
+
+        return NSDateFormatter().apply {
+            setDateFormat(pattern)
+            setLocale(locale)
+        }.stringFromDate(nsDate)
+    }
+
+    actual fun formatWithSkeleton(
+        utcTimeMillis: Long,
+        skeleton: String,
+        locale: CalendarLocale
+    ): String {
+
+        val nsDate = NSDate.dateWithTimeIntervalSince1970(utcTimeMillis / 1000.0)
+
+        return NSDateFormatter().apply {
+            setLocalizedDateFormatFromTemplate(skeleton)
+            setLocale(locale)
+        }.stringFromDate(nsDate)
+    }
+
+    actual fun parse(
+        date: String,
+        pattern: String
+    ): CalendarDate? {
+
+        val nsDate = NSDateFormatter().apply {
+            setDateFormat(pattern)
+            setTimeZone(TimeZone.UTC.toNSTimeZone())
+        }.dateFromString(date) ?: return null
+
+        return Instant
+            .fromEpochMilliseconds((nsDate.timeIntervalSince1970 * 1000).toLong())
+            .toCalendarDate(TimeZone.UTC)
+    }
+
+    actual fun getDateInputFormat(locale: CalendarLocale): DateInputFormat {
+
+        val pattern = NSDateFormatter().apply {
+            setLocale(locale)
+            setDateStyle(NSDateFormatterShortStyle)
+        }.dateFormat
+
+        val delimiter = pattern.first { !it.isLetter() }
+
+        return DateInputFormat(pattern, delimiter)
+    }
+
+    @Suppress("UNCHECKED_CAST")
+    actual fun weekdayNames(locale: CalendarLocale): List<Pair<String, String>>? {
+        val formatter = NSDateFormatter().apply {
+            setLocale(locale)
+        }
+
+        val fromSundayToSaturday = formatter.standaloneWeekdaySymbols
+            .zip(formatter.shortStandaloneWeekdaySymbols) as List<Pair<String, String>>
+
+        return fromSundayToSaturday.drop(1) + fromSundayToSaturday.first()
+    }
+
+    private fun firstDayOfWeek(): Int {
+        return (NSCalendar.currentCalendar.firstWeekday.toInt() - 1).takeIf { it > 0 } ?: 7
+    }
+}

compose/material3/material3/src/desktopMain/kotlin/androidx/compose/material3/PlatformDateFormat.desktop.kt

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.compose.material3
+
+internal actual object PlatformDateFormat {
+
+    private val delegate = LegacyCalendarModelImpl()
+
+    actual val firstDayOfWeek: Int
+        get() = delegate.firstDayOfWeek
+
+    actual fun formatWithPattern(
+        utcTimeMillis: Long,
+        pattern: String,
+        locale: CalendarLocale
+    ): String {
+        return delegate.formatWithPattern(utcTimeMillis, pattern, locale)
+    }
+
+    actual fun formatWithSkeleton(
+        utcTimeMillis: Long,
+        skeleton: String,
+        locale: CalendarLocale
+    ): String {
+        // Note: there is no equivalent in Java for Android's DateFormat.getBestDateTimePattern.
+        // The JDK SimpleDateFormat expects a pattern, so the results will be "2023Jan7",
+        // "2023January", etc. in case a skeleton holds an actual ICU skeleton and not a pattern.
+
+        // TODO: support ICU skeleton on JVM
+        // Maybe it will be supported in kotlinx.datetime in the future.
+        // See https://github.com/Kotlin/kotlinx-datetime/pull/251
+        return formatWithPattern(utcTimeMillis, skeleton, locale)
+    }
+
+    actual fun parse(
+        date: String,
+        pattern: String
+    ): CalendarDate? {
+
+
+        return delegate.parse(date, pattern)
+    }
+
+    actual fun getDateInputFormat(locale: CalendarLocale): DateInputFormat {
+        return delegate.getDateInputFormat(locale)
+    }
+
+    actual fun weekdayNames(locale: CalendarLocale): List<Pair<String, String>>? {
+        return delegate.weekdayNames(locale)
+    }
+}

compose/material3/material3/src/desktopTest/kotlin/androidx/compose/material3/CalendarModel.desktop.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.compose.material3
+
+import java.util.Locale
+
+actual fun calendarLocale(language : String, country : String) : CalendarLocale{
+    return Locale(language, country)
+}
+
+actual val supportsDateSkeleton: Boolean
+    get() = false