InternalActionFunctions.swift
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//
// InternalActionFunctions.swift
//
// Copyright (c) 2016-2017 JTAppleCalendar (https://github.com/patchthecode/JTAppleCalendar)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
extension JTAppleCalendarView {
/// Lays out subviews.
override open func layoutSubviews() {
super.layoutSubviews()
if !generalDelayedExecutionClosure.isEmpty, isCalendarLayoutLoaded {
executeDelayedTasks(.general)
}
}
func setupMonthInfoAndMap(with data: ConfigurationParameters? = nil) {
theData = setupMonthInfoDataForStartAndEndDate(with: data)
}
func developerError(string: String) {
print(string)
print(developerErrorMessage)
assert(false)
}
func setupNewLayout(from oldLayout: JTAppleCalendarLayoutProtocol) {
let newLayout = JTAppleCalendarLayout(withDelegate: self)
newLayout.scrollDirection = oldLayout.scrollDirection
newLayout.sectionInset = oldLayout.sectionInset
newLayout.minimumInteritemSpacing = oldLayout.minimumInteritemSpacing
newLayout.minimumLineSpacing = oldLayout.minimumLineSpacing
collectionViewLayout = newLayout
scrollDirection = newLayout.scrollDirection
sectionInset = newLayout.sectionInset
minimumLineSpacing = newLayout.minimumLineSpacing
minimumInteritemSpacing = newLayout.minimumInteritemSpacing
if #available(iOS 9.0, *) {
transform.a = semanticContentAttribute == .forceRightToLeft ? -1 : 1
}
super.dataSource = self
super.delegate = self
decelerationRate = .fast
#if os(iOS)
if isPagingEnabled {
scrollingMode = .stopAtEachCalendarFrame
} else {
scrollingMode = .none
}
#endif
}
func scrollTo(indexPath: IndexPath, triggerScrollToDateDelegate: Bool, isAnimationEnabled: Bool, position: UICollectionView.ScrollPosition, extraAddedOffset: CGFloat, completionHandler: (() -> Void)?) {
isScrollInProgress = true
if let validCompletionHandler = completionHandler { scrollDelayedExecutionClosure.append(validCompletionHandler) }
self.triggerScrollToDateDelegate = triggerScrollToDateDelegate
DispatchQueue.main.async {
self.scrollToItem(at: indexPath, at: position, animated: isAnimationEnabled)
if (isAnimationEnabled && self.calendarOffsetIsAlreadyAtScrollPosition(forIndexPath: indexPath)) ||
!isAnimationEnabled {
self.scrollViewDidEndScrollingAnimation(self)
}
self.isScrollInProgress = false
}
}
func scrollToHeaderInSection(_ section: Int,
triggerScrollToDateDelegate: Bool = false,
withAnimation animation: Bool = true,
extraAddedOffset: CGFloat,
completionHandler: (() -> Void)? = nil) {
if !calendarViewLayout.thereAreHeaders { return }
let indexPath = IndexPath(item: 0, section: section)
guard let attributes = calendarViewLayout.layoutAttributesForSupplementaryView(ofKind: UICollectionView.elementKindSectionHeader, at: indexPath) else { return }
isScrollInProgress = true
if let validHandler = completionHandler { scrollDelayedExecutionClosure.append(validHandler) }
self.triggerScrollToDateDelegate = triggerScrollToDateDelegate
let maxYCalendarOffset = max(0, self.contentSize.height - self.frame.size.height)
var topOfHeader = CGPoint(x: attributes.frame.origin.x,y: min(maxYCalendarOffset, attributes.frame.origin.y))
if scrollDirection == .horizontal { topOfHeader.x += extraAddedOffset} else { topOfHeader.y += extraAddedOffset }
DispatchQueue.main.async {
self.setContentOffset(topOfHeader, animated: animation)
if (animation && self.calendarOffsetIsAlreadyAtScrollPosition(forOffset: topOfHeader)) ||
!animation {
self.scrollViewDidEndScrollingAnimation(self)
}
self.isScrollInProgress = false
}
}
// Subclasses cannot use this function
@available(*, unavailable)
open override func reloadData() {
super.reloadData()
}
func handleScroll(point: CGPoint? = nil,
indexPath: IndexPath? = nil,
triggerScrollToDateDelegate: Bool = true,
isAnimationEnabled: Bool,
position: UICollectionView.ScrollPosition? = .left,
extraAddedOffset: CGFloat = 0,
completionHandler: (() -> Void)?) {
if isScrollInProgress { return }
// point takes preference
if let validPoint = point {
scrollTo(point: validPoint,
triggerScrollToDateDelegate: triggerScrollToDateDelegate,
isAnimationEnabled: isAnimationEnabled,
extraAddedOffset: extraAddedOffset,
completionHandler: completionHandler)
} else {
guard let validIndexPath = indexPath else { return }
var isNonConinuousScroll = true
switch scrollingMode {
case .none, .nonStopToCell: isNonConinuousScroll = false
default: break
}
if calendarViewLayout.thereAreHeaders,
scrollDirection == .vertical,
isNonConinuousScroll {
scrollToHeaderInSection(validIndexPath.section,
triggerScrollToDateDelegate: triggerScrollToDateDelegate,
withAnimation: isAnimationEnabled,
extraAddedOffset: extraAddedOffset,
completionHandler: completionHandler)
} else {
scrollTo(indexPath:validIndexPath,
triggerScrollToDateDelegate: triggerScrollToDateDelegate,
isAnimationEnabled: isAnimationEnabled,
position: position ?? .left,
extraAddedOffset: extraAddedOffset,
completionHandler: completionHandler)
}
}
}
func scrollTo(point: CGPoint, triggerScrollToDateDelegate: Bool? = nil, isAnimationEnabled: Bool, extraAddedOffset: CGFloat, completionHandler: (() -> Void)?) {
isScrollInProgress = true
if let validCompletionHandler = completionHandler { scrollDelayedExecutionClosure.append(validCompletionHandler) }
self.triggerScrollToDateDelegate = triggerScrollToDateDelegate
var point = point
if scrollDirection == .horizontal { point.x += extraAddedOffset } else { point.y += extraAddedOffset }
DispatchQueue.main.async() {
self.setContentOffset(point, animated: isAnimationEnabled)
if (isAnimationEnabled && self.calendarOffsetIsAlreadyAtScrollPosition(forOffset: point)) ||
!isAnimationEnabled {
self.scrollViewDidEndScrollingAnimation(self)
}
}
}
func setupMonthInfoDataForStartAndEndDate(with config: ConfigurationParameters? = nil) -> CalendarData {
var months = [Month]()
var monthMap = [Int: Int]()
var totalSections = 0
var totalDays = 0
var validConfig = config
if validConfig == nil { validConfig = calendarDataSource?.configureCalendar(self) }
if let validConfig = validConfig {
let comparison = validConfig.calendar.compare(validConfig.startDate, to: validConfig.endDate, toGranularity: .nanosecond)
if comparison == ComparisonResult.orderedDescending {
assert(false, "Error, your start date cannot be greater than your end date\n")
return (CalendarData(months: [], totalSections: 0, sectionToMonthMap: [:], totalDays: 0))
}
// Set the new cache
_cachedConfiguration = validConfig
if let
startMonth = calendar.startOfMonth(for: validConfig.startDate),
let endMonth = calendar.endOfMonth(for: validConfig.endDate) {
startOfMonthCache = startMonth
endOfMonthCache = endMonth
// Create the parameters for the date format generator
let parameters = ConfigurationParameters(startDate: startOfMonthCache,
endDate: endOfMonthCache,
numberOfRows: validConfig.numberOfRows,
calendar: calendar,
generateInDates: validConfig.generateInDates,
generateOutDates: validConfig.generateOutDates,
firstDayOfWeek: validConfig.firstDayOfWeek,
hasStrictBoundaries: validConfig.hasStrictBoundaries)
let generatedData = dateGenerator.setupMonthInfoDataForStartAndEndDate(parameters)
months = generatedData.months
monthMap = generatedData.monthMap
totalSections = generatedData.totalSections
totalDays = generatedData.totalDays
}
}
let data = CalendarData(months: months, totalSections: totalSections, sectionToMonthMap: monthMap, totalDays: totalDays)
return data
}
func batchReloadIndexPaths(_ indexPaths: [IndexPath]) {
let visiblePaths = indexPathsForVisibleItems
var visibleCellsToReload: [JTAppleCell: IndexPath] = [:]
for path in indexPaths {
if calendarViewLayout.cachedValue(for: path.item, section: path.section) == nil { continue }
pathsToReload.insert(path)
if visiblePaths.contains(path) {
visibleCellsToReload[cellForItem(at: path) as! JTAppleCell] = path
}
}
// Reload the visible paths
if !visibleCellsToReload.isEmpty {
for (cell, path) in visibleCellsToReload {
self.collectionView(self, willDisplay: cell, forItemAt: path)
}
}
}
func addCellToSelectedSet(_ indexPath: IndexPath, date: Date, cellState: CellState) {
selectedCellData[indexPath] = SelectedCellData(indexPath: indexPath, date: date, cellState: cellState)
}
func deleteCellFromSelectedSetIfSelected(_ indexPath: IndexPath) {
selectedCellData.removeValue(forKey: indexPath)
}
// Returns an indexPath if valid one was found
func deselectCounterPartCellIndexPath(_ indexPath: IndexPath, date: Date, dateOwner: DateOwner) -> IndexPath? {
guard let counterPartCellIndexPath = indexPathOfdateCellCounterPath(date, dateOwner: dateOwner) else { return nil }
deleteCellFromSelectedSetIfSelected(counterPartCellIndexPath)
deselectItem(at: counterPartCellIndexPath, animated: false)
return counterPartCellIndexPath
}
func selectCounterPartCellIndexPath(_ indexPath: IndexPath, date: Date, dateOwner: DateOwner) -> IndexPath? {
guard let counterPartCellIndexPath = indexPathOfdateCellCounterPath(date, dateOwner: dateOwner) else { return nil }
let counterPartCellState = cellStateFromIndexPath(counterPartCellIndexPath, isSelected: true)
addCellToSelectedSet(counterPartCellIndexPath, date: date, cellState: counterPartCellState)
// Update the selectedCellData counterIndexPathData
selectedCellData[indexPath]?.counterIndexPath = counterPartCellIndexPath
selectedCellData[counterPartCellIndexPath]?.counterIndexPath = indexPath
if allowsMultipleSelection {
// only if multiple selection is enabled. With single selection, we do not want the counterpart cell to be
// selected in place of the main cell. With multiselection, however, all can be selected
selectItem(at: counterPartCellIndexPath, animated: false, scrollPosition: [])
}
return counterPartCellIndexPath
}
func executeDelayedTasks(_ type: DelayedTaskType) {
let tasksToExecute: [(() -> Void)]
switch type {
case .scroll:
tasksToExecute = scrollDelayedExecutionClosure
scrollDelayedExecutionClosure.removeAll()
case .general:
tasksToExecute = generalDelayedExecutionClosure
generalDelayedExecutionClosure.removeAll()
}
for aTaskToExecute in tasksToExecute { aTaskToExecute() }
}
// Only reload the dates if the datasource information has changed
func reloadDelegateDataSource() -> (shouldReload: Bool, configParameters: ConfigurationParameters?) {
var retval: (Bool, ConfigurationParameters?) = (false, nil)
if let
newDateBoundary = calendarDataSource?.configureCalendar(self) {
// Jt101 do a check in each var to see if
// user has bad star/end dates
let newStartOfMonth = calendar.startOfMonth(for: newDateBoundary.startDate)
let newEndOfMonth = calendar.endOfMonth(for: newDateBoundary.endDate)
let oldStartOfMonth = calendar.startOfMonth(for: startDateCache)
let oldEndOfMonth = calendar.endOfMonth(for: endDateCache)
let newLastMonth = sizesForMonthSection()
let calendarLayout = calendarViewLayout
if
// ConfigParameters were changed
newStartOfMonth != oldStartOfMonth ||
newEndOfMonth != oldEndOfMonth ||
newDateBoundary.calendar != _cachedConfiguration.calendar ||
newDateBoundary.numberOfRows != _cachedConfiguration.numberOfRows ||
newDateBoundary.generateInDates != _cachedConfiguration.generateInDates ||
newDateBoundary.generateOutDates != _cachedConfiguration.generateOutDates ||
newDateBoundary.firstDayOfWeek != _cachedConfiguration.firstDayOfWeek ||
newDateBoundary.hasStrictBoundaries != _cachedConfiguration.hasStrictBoundaries ||
// Other layout information were changed
minimumInteritemSpacing != calendarLayout.minimumInteritemSpacing ||
minimumLineSpacing != calendarLayout.minimumLineSpacing ||
sectionInset != calendarLayout.sectionInset ||
lastMonthSize != newLastMonth ||
allowsDateCellStretching != calendarLayout.allowsDateCellStretching ||
scrollDirection != calendarLayout.scrollDirection ||
calendarLayout.isDirty {
lastMonthSize = newLastMonth
retval = (true, newDateBoundary)
}
}
return retval
}
func remapSelectedDatesWithCurrentLayout() -> (selected:(indexPaths:[IndexPath], counterPaths:[IndexPath]), selectedDates: [Date]) {
var retval = (selected:(indexPaths:[IndexPath](), counterPaths:[IndexPath]()), selectedDates: [Date]())
if !selectedDates.isEmpty {
let selectedDates = self.selectedDates
// Get the new paths
let newPaths = pathsFromDates(selectedDates)
// Get the new counter Paths
var newCounterPaths: [IndexPath] = []
for date in selectedDates {
if let counterPath = indexPathOfdateCellCounterPath(date, dateOwner: .thisMonth) {
newCounterPaths.append(counterPath)
}
}
// Append paths
retval.selected.indexPaths.append(contentsOf: newPaths)
retval.selected.counterPaths.append(contentsOf: newCounterPaths)
// Append dates to retval
for allPaths in [newPaths, newCounterPaths] {
for path in allPaths {
guard let dateFromPath = dateOwnerInfoFromPath(path)?.date else { continue }
retval.selectedDates.append(dateFromPath)
}
}
}
return retval
}
}