//
// NCViewerMediaZoom.swift
// Nextcloud
//
// Created by Marino Faggiana on 24/10/2020.
// Copyright © 2020 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 UIKit
import NCCommunication
class NCViewerMediaZoom: UIViewController {
@IBOutlet weak var detailViewConstraint: NSLayoutConstraint!
@IBOutlet weak var imageViewTopConstraint: NSLayoutConstraint!
@IBOutlet weak var imageViewBottomConstraint: NSLayoutConstraint!
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var imageVideoContainer: imageVideoContainerView!
@IBOutlet weak var statusViewImage: UIImageView!
@IBOutlet weak var statusLabel: UILabel!
@IBOutlet weak var detailView: NCViewerMediaDetailView!
@IBOutlet weak var playerToolBar: NCPlayerToolBar!
let appDelegate = UIApplication.shared.delegate as! AppDelegate
var viewerMedia: NCViewerMedia?
var ncplayer: NCPlayer?
var image: UIImage?
var metadata: tableMetadata = tableMetadata()
var index: Int = 0
var isShowDetail: Bool = false
var doubleTapGestureRecognizer: UITapGestureRecognizer = UITapGestureRecognizer()
var imageViewConstraint: CGFloat = 0
// MARK: - View Life Cycle
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
doubleTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didDoubleTapWith(gestureRecognizer:)))
doubleTapGestureRecognizer.numberOfTapsRequired = 2
}
deinit {
print("deinit NCViewerMediaZoom")
}
override func viewDidLoad() {
super.viewDidLoad()
scrollView.delegate = self
scrollView.maximumZoomScale = 4
scrollView.minimumZoomScale = 1
view.addGestureRecognizer(doubleTapGestureRecognizer)
if metadata.classFile == NCCommunicationCommon.typeClassFile.video.rawValue {
if image == nil {
image = UIImage.init(named: "noPreviewVideo")!.image(color: .gray, size: view.frame.width)
}
// Show Video Toolbar
if !metadata.livePhoto {
playerToolBar.isHidden = false
}
imageVideoContainer.image = image
imageVideoContainer.sourceImage = image
} else if metadata.classFile == NCCommunicationCommon.typeClassFile.audio.rawValue {
if image == nil {
image = UIImage.init(named: "noPreviewAudio")!.image(color: .gray, size: view.frame.width)
}
imageVideoContainer.image = image
imageVideoContainer.sourceImage = image
} else {
if image == nil {
image = UIImage.init(named: "noPreview")!.image(color: .gray, size: view.frame.width)
}
imageVideoContainer.image = image
imageVideoContainer.sourceImage = image
}
if NCManageDatabase.shared.getMetadataLivePhoto(metadata: metadata) != nil {
statusViewImage.image = NCUtility.shared.loadImage(named: "livephoto", color: .gray)
statusLabel.text = "LIVE"
} else {
statusViewImage.image = nil
statusLabel.text = ""
}
detailViewConstraint.constant = 0
detailView.hide()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
viewerMedia?.navigationItem.title = metadata.fileNameView
imageVideoContainer.image = image
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if (metadata.classFile == NCCommunicationCommon.typeClassFile.video.rawValue || metadata.classFile == NCCommunicationCommon.typeClassFile.audio.rawValue) {
if let url = NCKTVHTTPCache.shared.getVideoURL(metadata: metadata) {
self.ncplayer = NCPlayer.init(url: url, imageVideoContainer: self.imageVideoContainer, playerToolBar: self.playerToolBar, metadata: self.metadata)
self.viewerMedia?.ncplayer = self.ncplayer
}
}
// DOWNLOAD
downloadFile()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
self.ncplayer?.videoRemoved()
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
coordinator.animate(alongsideTransition: { (context) in
// back to the original size
self.scrollView.zoom(to: CGRect(x: 0, y: 0, width: self.scrollView.bounds.width, height: self.scrollView.bounds.height), animated: false)
self.view.layoutIfNeeded()
UIView.animate(withDuration: context.transitionDuration) {
// resize detail
if self.detailView.isShow() {
self.openDetail()
}
}
}) { (_) in }
}
func reload(image: UIImage, metadata: tableMetadata) {
self.image = image
imageVideoContainer.image = image
imageVideoContainer.sourceImage = image
self.metadata = metadata
}
//MARK: - Gesture
@objc func didDoubleTapWith(gestureRecognizer: UITapGestureRecognizer) {
if detailView.isShow() { return }
// NO ZOOM for Audio / Video
if (metadata.classFile == NCCommunicationCommon.typeClassFile.video.rawValue || metadata.classFile == NCCommunicationCommon.typeClassFile.audio.rawValue) && !playerToolBar.isHidden {
return
}
let pointInView = gestureRecognizer.location(in: self.imageVideoContainer)
var newZoomScale = self.scrollView.maximumZoomScale
if self.scrollView.zoomScale >= newZoomScale || abs(self.scrollView.zoomScale - newZoomScale) <= 0.01 {
newZoomScale = self.scrollView.minimumZoomScale
}
let width = self.scrollView.bounds.width / newZoomScale
let height = self.scrollView.bounds.height / newZoomScale
let originX = pointInView.x - (width / 2.0)
let originY = pointInView.y - (height / 2.0)
let rectToZoomTo = CGRect(x: originX, y: originY, width: width, height: height)
self.scrollView.zoom(to: rectToZoomTo, animated: true)
}
@objc func didPanWith(gestureRecognizer: UIPanGestureRecognizer) {
let currentLocation = gestureRecognizer.translation(in: self.view)
switch gestureRecognizer.state {
case .began:
var heightMap = (view.bounds.height / 3)
if view.bounds.width < view.bounds.height {
heightMap = (view.bounds.width / 3)
}
detailView.update(metadata: metadata, image: image, heightMap: heightMap)
case .ended:
if detailView.isShow() {
self.imageViewTopConstraint.constant = -imageViewConstraint
self.imageViewBottomConstraint.constant = imageViewConstraint
} else {
self.imageViewTopConstraint.constant = 0
self.imageViewBottomConstraint.constant = 0
}
case .changed:
imageViewTopConstraint.constant = (currentLocation.y - imageViewConstraint)
imageViewBottomConstraint.constant = -(currentLocation.y - imageViewConstraint)
// DISMISS VIEW
if detailView.isHidden && (currentLocation.y > 20) {
viewerMedia?.navigationController?.popViewController(animated: true)
gestureRecognizer.state = .ended
}
// CLOSE DETAIL
if !detailView.isHidden && (currentLocation.y > 20) {
self.closeDetail()
gestureRecognizer.state = .ended
}
// OPEN DETAIL
if detailView.isHidden && (currentLocation.y < -20) {
self.openDetail()
gestureRecognizer.state = .ended
}
default:
break
}
}
}
//MARK: -
extension NCViewerMediaZoom {
private func openDetail() {
self.detailView.show(textColor: self.viewerMedia?.textColor)
if let image = imageVideoContainer.image {
let ratioW = imageVideoContainer.frame.width / image.size.width
let ratioH = imageVideoContainer.frame.height / image.size.height
let ratio = ratioW < ratioH ? ratioW : ratioH
let imageHeight = image.size.height * ratio
imageViewConstraint = self.detailView.frame.height - ((self.view.frame.height - imageHeight) / 2) + self.view.safeAreaInsets.bottom
if imageViewConstraint < 0 { imageViewConstraint = 0 }
}
UIView.animate(withDuration: 0.3) {
self.imageViewTopConstraint.constant = -self.imageViewConstraint
self.imageViewBottomConstraint.constant = self.imageViewConstraint
self.detailViewConstraint.constant = self.detailView.frame.height
self.view.layoutIfNeeded()
} completion: { (_) in
}
scrollView.pinchGestureRecognizer?.isEnabled = false
playerToolBar.hideToolBar()
}
private func closeDetail() {
self.detailView.hide()
imageViewConstraint = 0
UIView.animate(withDuration: 0.3) {
self.imageViewTopConstraint.constant = 0
self.imageViewBottomConstraint.constant = 0
self.detailViewConstraint.constant = 0
self.view.layoutIfNeeded()
} completion: { (_) in
}
scrollView.pinchGestureRecognizer?.isEnabled = true
playerToolBar.showToolBar(metadata: metadata, detailView: nil)
}
func downloadFile() {
let isFolderEncrypted = CCUtility.isFolderEncrypted(metadata.serverUrl, e2eEncrypted: metadata.e2eEncrypted, account: metadata.account, urlBase: metadata.urlBase)
let ext = CCUtility.getExtension(metadata.fileNameView)
if !NCOperationQueue.shared.downloadExists(metadata: metadata) {
viewerMedia?.progressView.progress = 0
}
// DOWNLOAD FILE
if ((metadata.classFile == NCCommunicationCommon.typeClassFile.image.rawValue && CCUtility.getAutomaticDownloadImage()) || (metadata.contentType == "image/heic" && metadata.hasPreview == false) || ext == "GIF" || ext == "SVG" || isFolderEncrypted) && metadata.session == "" && !CCUtility.fileProviderStorageExists(metadata.ocId, fileNameView: metadata.fileNameView) {
NCOperationQueue.shared.download(metadata: metadata, selector: "")
}
// DOWNLOAD FILE LIVE PHOTO
if let metadataLivePhoto = NCManageDatabase.shared.getMetadataLivePhoto(metadata: metadata) {
if CCUtility.getAutomaticDownloadImage() && !CCUtility.fileProviderStorageExists(metadataLivePhoto.ocId, fileNameView: metadataLivePhoto.fileNameView) {
NCOperationQueue.shared.download(metadata: metadataLivePhoto, selector: "")
}
}
// DOWNLOAD preview for image
if !CCUtility.fileProviderStoragePreviewIconExists(metadata.ocId, etag: metadata.etag) && metadata.hasPreview && metadata.classFile == NCCommunicationCommon.typeClassFile.image.rawValue {
NCOperationQueue.shared.downloadThumbnail(metadata: metadata, placeholder: false, cell: nil, view: nil)
}
}
}
//MARK: -
extension NCViewerMediaZoom: UIScrollViewDelegate {
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return imageVideoContainer
}
func scrollViewDidZoom(_ scrollView: UIScrollView) {
if scrollView.zoomScale > 1 {
if let image = imageVideoContainer.image {
let ratioW = imageVideoContainer.frame.width / image.size.width
let ratioH = imageVideoContainer.frame.height / image.size.height
let ratio = ratioW < ratioH ? ratioW : ratioH
let newWidth = image.size.width * ratio
let newHeight = image.size.height * ratio
let conditionLeft = newWidth*scrollView.zoomScale > imageVideoContainer.frame.width
let left = 0.5 * (conditionLeft ? newWidth - imageVideoContainer.frame.width : (scrollView.frame.width - scrollView.contentSize.width))
let conditioTop = newHeight*scrollView.zoomScale > imageVideoContainer.frame.height
let top = 0.5 * (conditioTop ? newHeight - imageVideoContainer.frame.height : (scrollView.frame.height - scrollView.contentSize.height))
scrollView.contentInset = UIEdgeInsets(top: top, left: left, bottom: top, right: left)
}
} else {
scrollView.contentInset = .zero
}
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
}
}
//MARK: -
class imageVideoContainerView: UIImageView {
var playerLayer: CALayer?
var metadata: tableMetadata?
var sourceImage: UIImage?
override func layoutSublayers(of layer: CALayer) {
super.layoutSublayers(of: layer)
playerLayer?.frame = self.bounds
}
}