kirylkaveryn/organicmaps
1
Fork 0
forked from organicmaps/organicmaps-tmp
Code Pull requests Activity

[iOS] minor refactoring of TagsCollectionViewLayout

Browse source
This commit is contained in:
Aleksey Belousov 2020-07-03 00:30:23 +03:00 • committed by Alexander Boriskov
parent 5dfef4390a
commit c1fd02ba4f
1 changed files with 7 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
iphone/Maps/Bookmarks/Categories/Sharing/Tags/TagsCollectionViewLayout.swift
View file

@ -1,9 +1,9 @@
final class TagsCollectionViewLayout: UICollectionViewLayout {
private var headersCache: [IndexPath : UICollectionViewLayoutAttributes] = [:]
private var cellsCache: [IndexPath : UICollectionViewLayoutAttributes] = [:]
fileprivate var contentHeight: CGFloat = 0
private var contentHeight: CGFloat = 0
fileprivate var contentWidth: CGFloat {
private var contentWidth: CGFloat {
guard let collectionView = collectionView else {
return 0
}
@ -13,7 +13,7 @@ final class TagsCollectionViewLayout: UICollectionViewLayout {
}
override var collectionViewContentSize: CGSize {
return CGSize(width: contentWidth, height: contentHeight)
CGSize(width: contentWidth, height: contentHeight)
}
@IBInspectable var itemHeight: CGFloat = 50
@ -25,9 +25,7 @@ final class TagsCollectionViewLayout: UICollectionViewLayout {
override func prepare() {
super.prepare()
guard let collectionView = collectionView else {
return
}
guard let collectionView = collectionView else { return }
var xOffset: CGFloat = 0
var yOffset: CGFloat = 0
@ -73,28 +71,14 @@ final class TagsCollectionViewLayout: UICollectionViewLayout {
}
override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
var visibleLayoutAttributes = [UICollectionViewLayoutAttributes]()
for (_, attributes) in headersCache {
if attributes.frame.intersects(rect) {
visibleLayoutAttributes.append(attributes)
}
}
for (_, attributes) in cellsCache {
if attributes.frame.intersects(rect) {
visibleLayoutAttributes.append(attributes)
}
}
return visibleLayoutAttributes
[headersCache, cellsCache].reduce([]) { $0 + $1.values }.filter { $0.frame.intersects(rect) }
}
override func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
return cellsCache[indexPath]
cellsCache[indexPath]
}
override public func shouldInvalidateLayout(forPreferredLayoutAttributes preferredAttributes: UICollectionViewLayoutAttributes,
override func shouldInvalidateLayout(forPreferredLayoutAttributes preferredAttributes: UICollectionViewLayoutAttributes,
withOriginalAttributes originalAttributes: UICollectionViewLayoutAttributes) -> Bool {
//dont validate layout if original width already equals to contentWidth - it's the best deal we can offer to cell
if preferredAttributes.size.height != originalAttributes.size.height ||