[Delegate] implement additional context menu APIs

[jessesquires]

Docs: https://developer.apple.com/documentation/uikit/uicollectionviewdelegate#3580853

Already implemented

func collectionView(UICollectionView, contextMenuConfigurationForItemAt: IndexPath, point: CGPoint) -> UIContextMenuConfiguration?

NOT implemented

func collectionView(UICollectionView, previewForDismissingContextMenuWithConfiguration: UIContextMenuConfiguration) -> UITargetedPreview?
func collectionView(UICollectionView, previewForHighlightingContextMenuWithConfiguration: UIContextMenuConfiguration) -> UITargetedPreview?

func collectionView(UICollectionView,  willDisplayContextMenu configuration: UIContextMenuConfiguration,  animator: UIContextMenuInteractionAnimating?)
func collectionView(UICollectionView, willEndContextMenuInteraction configuration: UIContextMenuConfiguration,  animator: UIContextMenuInteractionAnimating?)

func collectionView(UICollectionView, willPerformPreviewActionForMenuWith: UIContextMenuConfiguration, animator: UIContextMenuInteractionCommitAnimating)

[jessesquires]

https://useyourloaf.com/blog/adding-context-menus-in-ios-13/

[jessesquires]

currently, only implementing:

public func collectionView(
_ collectionView: UICollectionView, 
contextMenuConfigurationForItemAt 
indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration?

[ruddfawcett]

@jessesquires saw this from #129, are you happy for me to take this? Assuming we can forward on CollectionViewModel?

[jessesquires]

@ruddfawcett sure! 😄

Just be aware that I'll be working on some bigger changes next week: #129 (comment)

[nuomi1]

These three functions do not have an IndexPath parameter anytime, so we cannot find the SectionViewModel or the CellViewModel.

// iOS 13.2+
func collectionView(_ collectionView: UICollectionView, willDisplayContextMenu configuration: UIContextMenuConfiguration, animator: (any UIContextMenuInteractionAnimating)?)
// iOS 13.2+
func collectionView(_ collectionView: UICollectionView, willEndContextMenuInteraction configuration: UIContextMenuConfiguration, animator: (any UIContextMenuInteractionAnimating)?)
// iOS 13.0+
func collectionView(_ collectionView: UICollectionView, willPerformPreviewActionForMenuWith configuration: UIContextMenuConfiguration, animator: any UIContextMenuInteractionCommitAnimating)

---

This function uses the [IndexPath] parameter starting from iOS 16, and multiple sections may be used. Also we cannot find the SectionViewModel or the CellViewModel.

// new iOS 16.0+
func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemsAt indexPaths: [IndexPath], point: CGPoint) -> UIContextMenuConfiguration?
// old iOS 13.0-16.0
func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration?

---

These two functions did not have an IndexPath parameter before iOS 16, so we cannot find the SectionViewModel or the CellViewModel.

// new iOS 16.0+
func collectionView(_ collectionView: UICollectionView, contextMenuConfiguration configuration: UIContextMenuConfiguration, highlightPreviewForItemAt indexPath: IndexPath) -> UITargetedPreview?
// old iOS 13.0-16.0
func collectionView(_ collectionView: UICollectionView, previewForDismissingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview?

// new iOS 16.0+
func collectionView(_ collectionView: UICollectionView, contextMenuConfiguration configuration: UIContextMenuConfiguration, dismissalPreviewForItemAt indexPath: IndexPath) -> UITargetedPreview?
// old iOS 13.0-16.0
func collectionView(_ collectionView: UICollectionView, previewForHighlightingContextMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview?

[nuomi1]

Video: https://developer.apple.com/videos/play/wwdc2022/10070/?time=1016