Revision 052fc0b6
| ChatSecure/Classes/View Controllers/OTRMessagesCollectionViewFlowLayout.swift | ||
|---|---|---|
| 14 | 14 |
func hasBubbleSizeForCellAtIndexPath(_ indexPath: IndexPath) -> Bool |
| 15 | 15 |
} |
| 16 | 16 |
|
| 17 |
@objc public class OTRMessagesCollectionSupplementaryViewInfo: NSObject {
|
|
| 18 |
public var kind:String |
|
| 19 |
public var height:CGFloat |
|
| 20 |
|
|
| 21 |
@objc public init(kind:String, height:CGFloat) {
|
|
| 22 |
self.kind = kind |
|
| 23 |
self.height = height |
|
| 24 |
super.init() |
|
| 25 |
} |
|
| 26 |
} |
|
| 27 |
|
|
| 28 |
@objc public protocol OTRMessagesCollectionViewFlowLayoutSupplementaryViewProtocol {
|
|
| 29 |
func supplementaryViewsForCellAtIndexPath(_ indexPath: IndexPath) -> [OTRMessagesCollectionSupplementaryViewInfo]? |
|
| 30 |
} |
|
| 31 |
|
|
| 17 | 32 |
@objc open class OTRMessagesCollectionViewFlowLayout:JSQMessagesCollectionViewFlowLayout {
|
| 18 | 33 |
|
| 19 | 34 |
@objc open weak var sizeDelegate:OTRMessagesCollectionViewFlowLayoutSizeProtocol? |
| 20 |
|
|
| 35 |
@objc open weak var supplementaryViewDelegate:OTRMessagesCollectionViewFlowLayoutSupplementaryViewProtocol? |
|
| 36 |
|
|
| 21 | 37 |
@objc override open func messageBubbleSizeForItem(at indexPath: IndexPath!) -> CGSize {
|
| 22 | 38 |
guard let delegate = self.sizeDelegate, !delegate.hasBubbleSizeForCellAtIndexPath(indexPath) else {
|
| 23 | 39 |
return super.messageBubbleSizeForItem(at: indexPath) |
| ... | ... | |
| 27 | 43 |
return CGSize(width: 1, height: 0) |
| 28 | 44 |
} |
| 29 | 45 |
|
| 46 |
open override var collectionViewContentSize: CGSize {
|
|
| 47 |
var size = super.collectionViewContentSize |
|
| 48 |
if let delegate = self.supplementaryViewDelegate {
|
|
| 49 |
for section in 0..<self.collectionView.numberOfSections {
|
|
| 50 |
for item in 0..<self.collectionView.numberOfItems(inSection: section) {
|
|
| 51 |
if let views = delegate.supplementaryViewsForCellAtIndexPath(IndexPath(item: item, section: section)) {
|
|
| 52 |
for view in views {
|
|
| 53 |
size.height += view.height |
|
| 54 |
} |
|
| 55 |
} |
|
| 56 |
} |
|
| 57 |
} |
|
| 58 |
} |
|
| 59 |
return size |
|
| 60 |
} |
|
| 61 |
|
|
| 62 |
override open func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
|
|
| 63 |
guard var attributes = super.layoutAttributesForElements(in: rect) else { return nil }
|
|
| 64 |
|
|
| 65 |
var offset:CGFloat = 0 |
|
| 66 |
for attribute in attributes {
|
|
| 67 |
if (attribute.representedElementCategory == UICollectionElementCategory.cell) {
|
|
| 68 |
attribute.frame = attribute.frame.offsetBy(dx: 0, dy: offset) |
|
| 69 |
if let delegate = self.supplementaryViewDelegate {
|
|
| 70 |
if let views = delegate.supplementaryViewsForCellAtIndexPath(attribute.indexPath) {
|
|
| 71 |
for view in views {
|
|
| 72 |
offset += view.height |
|
| 73 |
let suppViewAttrs = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: view.kind, with: attribute.indexPath) |
|
| 74 |
suppViewAttrs.frame = CGRect(x: attribute.frame.origin.x, y: attribute.frame.origin.y+attribute.frame.size.height, width: attribute.frame.size.width, height: view.height) |
|
| 75 |
attributes.append(suppViewAttrs) |
|
| 76 |
} |
|
| 77 |
} |
|
| 78 |
} |
|
| 79 |
} |
|
| 80 |
} |
|
| 81 |
return attributes |
|
| 82 |
} |
|
| 30 | 83 |
} |
Also available in: Unified diff