21 milestone1 adding holiday calendar

.gitignore

@@ -71,3 +71,4 @@ fastlane/test_output
 xcshareddata
 UserInterfaceState.xcuserstate
 .DS_Store
+#Example/HorizonCalendarExample/HorizonCalendarExample.xcodeproj/project.pbxproj

Example/HorizonCalendarExample/HorizonCalendarExample.xcodeproj/project.pbxproj

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		645FFEFC2D6D5E61002EE721 /* WeekdayOnlyDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 645FFEFB2D6D5E61002EE721 /* WeekdayOnlyDemoViewController.swift */; };
+		645FFF022D73B86A002EE721 /* WeekNumberDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 645FFF012D73B86A002EE721 /* WeekNumberDemoViewController.swift */; };
 		9381769C249B74BB00E18FA3 /* DemoPickerViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9381769B249B74BB00E18FA3 /* DemoPickerViewController.swift */; };
 		9381769F249B79DC00E18FA3 /* ScrollToDayWithAnimationDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9381769E249B79DC00E18FA3 /* ScrollToDayWithAnimationDemoViewController.swift */; };
 		938176A1249B7CE600E18FA3 /* DayRangeSelectionDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 938176A0249B7CE600E18FA3 /* DayRangeSelectionDemoViewController.swift */; };
@@ -22,7 +24,11 @@
 		939E69942484D55200A8BCC7 /* HorizonCalendar.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 939E69912484D11000A8BCC7 /* HorizonCalendar.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		93A7258E24A1F26C00B4F08F /* PartialMonthVisibilityDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 93A7258D24A1F26C00B4F08F /* PartialMonthVisibilityDemoViewController.swift */; };
 		93AF5545248DCC8900BDB0FF /* DayRangeIndicatorView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 93AF5544248DCC8900BDB0FF /* DayRangeIndicatorView.swift */; };
-		FD53899F299476AD007D56EB /* DayRangeSelectionTracker.swift in Sources */ = {isa = PBXBuildFile; fileRef = FD53899E299476AD007D56EB /* DayRangeSelectionTracker.swift */; };
+		AA79A7D12D74319B00C07DD0 /* SwiftUIDisabledDayDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA79A7D02D74319B00C07DD0 /* SwiftUIDisabledDayDemoViewController.swift */; };
+		AA79A7D52D74346200C07DD0 /* DayRangeSelectionHelperExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA79A7D42D74346200C07DD0 /* DayRangeSelectionHelperExtension.swift */; };
+		AA79A7E02D74E1F400C07DD0 /* SwiftUIWeekViewViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA79A7DF2D74E1F400C07DD0 /* SwiftUIWeekViewViewController.swift */; };
+		AA79A83E2D750BCC00C07DD0 /* SwiftUIFlexWeekViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA79A83D2D750BCC00C07DD0 /* SwiftUIFlexWeekViewController.swift */; };
+		AA79A88A2D751C0600C07DD0 /* SelectedDayView.swift in Sources */ = {isa = PBXBuildFile; fileRef = AA79A8892D751C0600C07DD0 /* SelectedDayView.swift */; };
 		FD55C5D7298B138A00A9B5D6 /* SwiftUIScreenDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = FD55C5D6298B138A00A9B5D6 /* SwiftUIScreenDemoViewController.swift */; };
 		FDA0FB3528F5EFD90066DEFA /* SwiftUIDayView.swift in Sources */ = {isa = PBXBuildFile; fileRef = FDA0FB3428F5EFD90066DEFA /* SwiftUIDayView.swift */; };
 		FDA0FB3728F5EFF60066DEFA /* SwiftUIItemModelsDemoViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = FDA0FB3628F5EFF60066DEFA /* SwiftUIItemModelsDemoViewController.swift */; };
@@ -44,6 +50,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		645FFEFB2D6D5E61002EE721 /* WeekdayOnlyDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WeekdayOnlyDemoViewController.swift; sourceTree = "<group>"; };
+		645FFF012D73B86A002EE721 /* WeekNumberDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WeekNumberDemoViewController.swift; sourceTree = "<group>"; };
 		9381769B249B74BB00E18FA3 /* DemoPickerViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DemoPickerViewController.swift; sourceTree = "<group>"; };
 		9381769E249B79DC00E18FA3 /* ScrollToDayWithAnimationDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScrollToDayWithAnimationDemoViewController.swift; sourceTree = "<group>"; };
 		938176A0249B7CE600E18FA3 /* DayRangeSelectionDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DayRangeSelectionDemoViewController.swift; sourceTree = "<group>"; };
@@ -60,7 +68,11 @@
 		939E69912484D11000A8BCC7 /* HorizonCalendar.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = HorizonCalendar.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		93A7258D24A1F26C00B4F08F /* PartialMonthVisibilityDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PartialMonthVisibilityDemoViewController.swift; sourceTree = "<group>"; };
 		93AF5544248DCC8900BDB0FF /* DayRangeIndicatorView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DayRangeIndicatorView.swift; sourceTree = "<group>"; };
-		FD53899E299476AD007D56EB /* DayRangeSelectionTracker.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DayRangeSelectionTracker.swift; sourceTree = "<group>"; };
+		AA79A7D02D74319B00C07DD0 /* SwiftUIDisabledDayDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwiftUIDisabledDayDemoViewController.swift; sourceTree = "<group>"; };
+		AA79A7D42D74346200C07DD0 /* DayRangeSelectionHelperExtension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DayRangeSelectionHelperExtension.swift; sourceTree = "<group>"; };
+		AA79A7DF2D74E1F400C07DD0 /* SwiftUIWeekViewViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwiftUIWeekViewViewController.swift; sourceTree = "<group>"; };
+		AA79A83D2D750BCC00C07DD0 /* SwiftUIFlexWeekViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwiftUIFlexWeekViewController.swift; sourceTree = "<group>"; };
+		AA79A8892D751C0600C07DD0 /* SelectedDayView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SelectedDayView.swift; sourceTree = "<group>"; };
 		FD55C5D6298B138A00A9B5D6 /* SwiftUIScreenDemoViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SwiftUIScreenDemoViewController.swift; sourceTree = "<group>"; };
 		FDA0FB3428F5EFD90066DEFA /* SwiftUIDayView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SwiftUIDayView.swift; sourceTree = "<group>"; };
 		FDA0FB3628F5EFF60066DEFA /* SwiftUIItemModelsDemoViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SwiftUIItemModelsDemoViewController.swift; sourceTree = "<group>"; };
@@ -83,6 +95,7 @@
 			isa = PBXGroup;
 			children = (
 				938176A6249B85CE00E18FA3 /* DemoViewController.swift */,
+				645FFF012D73B86A002EE721 /* WeekNumberDemoViewController.swift */,
 				939E696E2484CD8E00A8BCC7 /* SingleDaySelectionDemoViewController.swift */,
 				938176A0249B7CE600E18FA3 /* DayRangeSelectionDemoViewController.swift */,
 				938176A2249B7F0800E18FA3 /* SelectedDayTooltipDemoViewController.swift */,
@@ -92,6 +105,10 @@
 				FDD8EE7329885AF500F6EC9D /* MonthBackgroundDemoViewController.swift */,
 				FDA0FB3628F5EFF60066DEFA /* SwiftUIItemModelsDemoViewController.swift */,
 				FD55C5D6298B138A00A9B5D6 /* SwiftUIScreenDemoViewController.swift */,
+				645FFEFB2D6D5E61002EE721 /* WeekdayOnlyDemoViewController.swift */,
+				AA79A7D02D74319B00C07DD0 /* SwiftUIDisabledDayDemoViewController.swift */,
+				AA79A7DF2D74E1F400C07DD0 /* SwiftUIWeekViewViewController.swift */,
+				AA79A83D2D750BCC00C07DD0 /* SwiftUIFlexWeekViewController.swift */,
 			);
 			path = "Demo View Controllers";
 			sourceTree = "<group>";
@@ -119,10 +136,11 @@
 				939E696A2484CD8E00A8BCC7 /* AppDelegate.swift */,
 				9381769B249B74BB00E18FA3 /* DemoPickerViewController.swift */,
 				9381769D249B79CB00E18FA3 /* Demo View Controllers */,
-				FD53899E299476AD007D56EB /* DayRangeSelectionTracker.swift */,
 				93AF5544248DCC8900BDB0FF /* DayRangeIndicatorView.swift */,
+				AA79A7D42D74346200C07DD0 /* DayRangeSelectionHelperExtension.swift */,
 				FDA0FB3428F5EFD90066DEFA /* SwiftUIDayView.swift */,
 				939853512498992E0022A3A1 /* TooltipView.swift */,
+				AA79A8892D751C0600C07DD0 /* SelectedDayView.swift */,
 				939E69732484CD9000A8BCC7 /* Assets.xcassets */,
 				939E69752484CD9000A8BCC7 /* LaunchScreen.storyboard */,
 				939E69782484CD9000A8BCC7 /* Info.plist */,
@@ -214,16 +232,22 @@
 				939E696F2484CD8E00A8BCC7 /* SingleDaySelectionDemoViewController.swift in Sources */,
 				938176A3249B7F0800E18FA3 /* SelectedDayTooltipDemoViewController.swift in Sources */,
 				FDA0FB3528F5EFD90066DEFA /* SwiftUIDayView.swift in Sources */,
+				645FFEFC2D6D5E61002EE721 /* WeekdayOnlyDemoViewController.swift in Sources */,
 				938176A1249B7CE600E18FA3 /* DayRangeSelectionDemoViewController.swift in Sources */,
-				FD53899F299476AD007D56EB /* DayRangeSelectionTracker.swift in Sources */,
 				9381769C249B74BB00E18FA3 /* DemoPickerViewController.swift in Sources */,
 				939853522498992E0022A3A1 /* TooltipView.swift in Sources */,
+				AA79A7D52D74346200C07DD0 /* DayRangeSelectionHelperExtension.swift in Sources */,
+				AA79A88A2D751C0600C07DD0 /* SelectedDayView.swift in Sources */,
+				AA79A83E2D750BCC00C07DD0 /* SwiftUIFlexWeekViewController.swift in Sources */,
 				938176A7249B85CE00E18FA3 /* DemoViewController.swift in Sources */,
 				9381769F249B79DC00E18FA3 /* ScrollToDayWithAnimationDemoViewController.swift in Sources */,
 				93AF5545248DCC8900BDB0FF /* DayRangeIndicatorView.swift in Sources */,
+				645FFF022D73B86A002EE721 /* WeekNumberDemoViewController.swift in Sources */,
 				938176A5249B828600E18FA3 /* LargeDayRangeDemoViewController.swift in Sources */,
+				AA79A7E02D74E1F400C07DD0 /* SwiftUIWeekViewViewController.swift in Sources */,
 				FDD8EE7429885AF500F6EC9D /* MonthBackgroundDemoViewController.swift in Sources */,
 				FD55C5D7298B138A00A9B5D6 /* SwiftUIScreenDemoViewController.swift in Sources */,
+				AA79A7D12D74319B00C07DD0 /* SwiftUIDisabledDayDemoViewController.swift in Sources */,
 				939E696B2484CD8E00A8BCC7 /* AppDelegate.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

Example/HorizonCalendarExample/HorizonCalendarExample/DayRangeIndicatorView.swift

@@ -102,8 +102,7 @@ extension DayRangeIndicatorView: CalendarItemViewRepresentable {
 
   static func makeView(
     withInvariantViewProperties invariantViewProperties: InvariantViewProperties)
-    -> DayRangeIndicatorView
-  {
+    -> DayRangeIndicatorView {
     DayRangeIndicatorView(indicatorColor: invariantViewProperties.indicatorColor)
   }
 

Example/HorizonCalendarExample/HorizonCalendarExample/DayRangeSelectionHelperExtension.swift

@@ -0,0 +1,59 @@
+// Created by Bryan Keller on 2/8/23.
+// Copyright © 2023 Airbnb Inc. All rights reserved.
+
+// 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.
+
+import HorizonCalendar
+import UIKit
+
+extension DayRangeSelectionHelper {
+
+    @discardableResult
+    static func updateDayRange(afterDragSelectionOf day: Day,
+                               existingDayRange: inout DayComponentsRange?,
+                               initialDayRange: inout DayComponentsRange?,
+                               state: UIGestureRecognizer.State,
+                               calendar: Calendar) -> Set<Date> {
+
+        let invalidDates = getInvalidDateSet(day, existingDayRange, calendar)
+
+        guard invalidDates == [] else { return invalidDates }
+
+        switch state {
+        case .began:
+            if day != existingDayRange?.lowerBound, day != existingDayRange?.upperBound {
+                existingDayRange = day...day
+            }
+            initialDayRange = existingDayRange
+
+        case .changed, .ended:
+            guard initialDayRange != nil else {
+                fatalError("`initialDayRange` should not be `nil`")
+            }
+
+            performUpdateRange(day,
+                               &existingDayRange,
+                               &initialDayRange,
+                               calendar)
+
+        default:
+            existingDayRange = nil
+            initialDayRange = nil
+        }
+
+
+
+        return []
+    }
+
+}

Example/HorizonCalendarExample/HorizonCalendarExample/Demo View Controllers/DayRangeSelectionDemoViewController.swift

@@ -69,10 +69,12 @@ final class DayRangeSelectionDemoViewController: BaseDemoViewController {
       calendar: calendar,
       visibleDateRange: startDate...endDate,
       monthsLayout: monthsLayout)
+
 
       .interMonthSpacing(24)
       .verticalDayMargin(8)
       .horizontalDayMargin(8)
+
 
       .dayItemProvider { [calendar, dayDateFormatter] day in
         var invariantViewProperties = DayView.InvariantViewProperties.baseInteractive