//
// NCScan+CollectionView.swift
// Nextcloud
//
// Created by Marino Faggiana on 22/02/22.
// Copyright © 2022 Marino Faggiana. All rights reserved.
//
// Author Marino Faggiana <marino.faggiana@nextcloud.com>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
import Foundation
extension NCScan: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return collectionView == collectionViewSource ? itemsSource.count : imagesDestination.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView == collectionViewSource {
let cell = (collectionView.dequeueReusableCell(withReuseIdentifier: "cell1", for: indexPath) as? NCScanCell)!
let fileNamePath = CCUtility.getDirectoryScan() + "/" + itemsSource[indexPath.row]
guard let data = try? Data(contentsOf: URL(fileURLWithPath: fileNamePath)), var image = UIImage(data: data) else { return cell }
let imageWidthInPixels = image.size.width * image.scale
let imageHeightInPixels = image.size.height * image.scale
// 72 DPI
if imageWidthInPixels > 595 || imageHeightInPixels > 842 {
image = image.resizeImage(size: CGSize(width: 595, height: 842)) ?? image
}
cell.indexPath = indexPath
cell.customImageView?.image = image
cell.delete.action(for: .touchUpInside) { sender in
let buttonPosition: CGPoint = (sender as? UIButton)!.convert(.zero, to: self.collectionViewSource)
if let indexPath = self.collectionViewSource.indexPathForItem(at: buttonPosition) {
let fileNameAtPath = CCUtility.getDirectoryScan() + "/" + self.itemsSource[indexPath.row]
CCUtility.removeFile(atPath: fileNameAtPath)
self.itemsSource.remove(at: indexPath.row)
self.collectionViewSource.deleteItems(at: [indexPath])
}
}
return cell
} else {
let cell = (collectionView.dequeueReusableCell(withReuseIdentifier: "cell2", for: indexPath) as? NCScanCell)!
cell.delegate = self
cell.index = indexPath.row
cell.indexPath = indexPath
var image = imagesDestination[indexPath.row]
let imageWidthInPixels = image.size.width * image.scale
let imageHeightInPixels = image.size.height * image.scale
// 72 DPI
if imageWidthInPixels > 595 || imageHeightInPixels > 842 {
image = image.resizeImage(size: CGSize(width: 595, height: 842)) ?? image
}
cell.customImageView?.image = filter(image: image)
cell.customLabel.text = NSLocalizedString("_scan_document_pdf_page_", comment: "") + " " + "\(indexPath.row + 1)"
return cell
}
}
}
extension NCScan: UICollectionViewDragDelegate {
func collectionView(_ collectionView: UICollectionView, itemsForBeginning session: UIDragSession, at indexPath: IndexPath) -> [UIDragItem] {
if collectionView == collectionViewSource {
let item = itemsSource[indexPath.row]
let itemProvider = NSItemProvider(object: item as NSString)
let dragItem = UIDragItem(itemProvider: itemProvider)
dragItem.localObject = item
return [dragItem]
} else {
let item = imagesDestination[indexPath.row]
let itemProvider = NSItemProvider(object: item as UIImage)
let dragItem = UIDragItem(itemProvider: itemProvider)
dragItem.localObject = item
return [dragItem]
}
}
func collectionView(_ collectionView: UICollectionView, itemsForAddingTo session: UIDragSession, at indexPath: IndexPath, point: CGPoint) -> [UIDragItem] {
if collectionView == collectionViewSource {
let item = itemsSource[indexPath.row]
let itemProvider = NSItemProvider(object: item as NSString)
let dragItem = UIDragItem(itemProvider: itemProvider)
dragItem.localObject = item
return [dragItem]
} else {
let item = imagesDestination[indexPath.row]
let itemProvider = NSItemProvider(object: item as UIImage)
let dragItem = UIDragItem(itemProvider: itemProvider)
dragItem.localObject = item
return [dragItem]
}
}
func collectionView(_ collectionView: UICollectionView, dragPreviewParametersForItemAt indexPath: IndexPath) -> UIDragPreviewParameters? {
let previewParameters = UIDragPreviewParameters()
if collectionView == collectionViewSource {
previewParameters.visiblePath = UIBezierPath(rect: CGRect(x: 20, y: 20, width: 100, height: 100))
} else {
previewParameters.visiblePath = UIBezierPath(rect: CGRect(x: 20, y: 20, width: 80, height: 80))
}
return previewParameters
}
}
extension NCScan: UICollectionViewDropDelegate {
func collectionView(_ collectionView: UICollectionView, canHandle session: UIDropSession) -> Bool {
return true // session.canLoadObjects(ofClass: NSString.self)
}
func collectionView(_ collectionView: UICollectionView, dropSessionDidUpdate session: UIDropSession, withDestinationIndexPath destinationIndexPath: IndexPath?) -> UICollectionViewDropProposal {
if collectionView == collectionViewSource {
if collectionView.hasActiveDrag {
return UICollectionViewDropProposal(operation: .move, intent: .insertAtDestinationIndexPath)
} else {
return UICollectionViewDropProposal(operation: .forbidden)
}
} else {
if collectionView.hasActiveDrag {
return UICollectionViewDropProposal(operation: .move, intent: .insertAtDestinationIndexPath)
} else {
return UICollectionViewDropProposal(operation: .copy, intent: .insertAtDestinationIndexPath)
}
}
}
func collectionView(_ collectionView: UICollectionView, performDropWith coordinator: UICollectionViewDropCoordinator) {
let destinationIndexPath: IndexPath
switch coordinator.proposal.operation {
case .move:
if let indexPath = coordinator.destinationIndexPath {
destinationIndexPath = indexPath
} else {
// Get last index path of table view.
let section = collectionView.numberOfSections - 1
let row = collectionView.numberOfItems(inSection: section)
destinationIndexPath = IndexPath(row: row, section: section)
}
reorderItems(coordinator: coordinator, destinationIndexPath: destinationIndexPath, collectionView: collectionView)
case .copy:
// Get last index path of table view.
let section = collectionView.numberOfSections - 1
let row = collectionView.numberOfItems(inSection: section)
destinationIndexPath = IndexPath(row: row, section: section)
copyItems(coordinator: coordinator, destinationIndexPath: destinationIndexPath, collectionView: collectionView)
default:
return
}
}
func collectionView(_ collectionView: UICollectionView, dropSessionDidEnd session: UIDropSession) {
collectionViewDestination.reloadData()
// Save button
if imagesDestination.isEmpty {
save.isEnabled = false
} else {
save.isEnabled = true
}
}
}