77 lines
3.4 KiB
Swift
77 lines
3.4 KiB
Swift
/*
|
|
The MIT License (MIT)
|
|
|
|
Copyright (c) 2015-present Badoo Trading Limited.
|
|
|
|
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.
|
|
*/
|
|
|
|
import UIKit
|
|
|
|
protocol PhotosInputCellProviderProtocol {
|
|
func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell
|
|
}
|
|
|
|
class PhotosInputPlaceholderCellProvider: PhotosInputCellProviderProtocol {
|
|
private var reuseIdentifier = "PhotosPlaceholderCellProvider"
|
|
private let collectionView: UICollectionView
|
|
init(collectionView: UICollectionView) {
|
|
self.collectionView = collectionView
|
|
self.collectionView.registerClass(PhotosInputPlaceholderCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
|
|
}
|
|
|
|
func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell {
|
|
return self.collectionView.dequeueReusableCellWithReuseIdentifier(self.reuseIdentifier, forIndexPath: indexPath)
|
|
}
|
|
}
|
|
|
|
class PhotosInputCellProvider: PhotosInputCellProviderProtocol {
|
|
private var reuseIdentifier = "PhotosCellProvider"
|
|
private let collectionView: UICollectionView
|
|
private let dataProvider: PhotosInputDataProvider
|
|
init(collectionView: UICollectionView, dataProvider: PhotosInputDataProvider) {
|
|
self.dataProvider = dataProvider
|
|
self.collectionView = collectionView
|
|
self.collectionView.registerClass(PhotosInputCell.self, forCellWithReuseIdentifier: self.reuseIdentifier)
|
|
}
|
|
|
|
func cellForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewCell {
|
|
let cell = self.collectionView.dequeueReusableCellWithReuseIdentifier(self.reuseIdentifier, forIndexPath: indexPath) as! PhotosInputCell
|
|
self.configureCell(cell, atIndexPath: indexPath)
|
|
return cell
|
|
}
|
|
|
|
private let previewRequests = NSMapTable.weakToStrongObjectsMapTable()
|
|
private func configureCell(cell: PhotosInputCell, atIndexPath indexPath: NSIndexPath) {
|
|
if let requestID = self.previewRequests.objectForKey(cell) as? NSNumber {
|
|
self.previewRequests.removeObjectForKey(cell)
|
|
self.dataProvider.cancelPreviewImageRequest(requestID.intValue)
|
|
}
|
|
|
|
let index = indexPath.item - 1
|
|
let targetSize = cell.bounds.size
|
|
let requestID = self.dataProvider.requestPreviewImageAtIndex(index, targetSize: targetSize) { image in
|
|
self.previewRequests.removeObjectForKey(cell)
|
|
cell.image = image
|
|
}
|
|
|
|
self.previewRequests.setObject(NSNumber(int: requestID), forKey:cell)
|
|
}
|
|
}
|