//
// NCViewerPDF.swift
// Nextcloud
//
// Created by Marino Faggiana on 06/02/2020.
// 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 Foundation
import PDFKit
class NCViewerPDF: UIViewController, NCViewerPDFSearchDelegate {
let appDelegate = UIApplication.shared.delegate as! AppDelegate
var metadata = tableMetadata()
private var pdfView = PDFView()
private var thumbnailViewHeight: CGFloat = 40
private var pdfThumbnailView = PDFThumbnailView()
private var pdfDocument: PDFDocument?
private let pageView = UIView()
private let pageViewLabel = UILabel()
private var pageViewWidthAnchor : NSLayoutConstraint?
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func viewDidLoad() {
let filePath = CCUtility.getDirectoryProviderStorageOcId(metadata.ocId, fileNameView: metadata.fileNameView)!
NotificationCenter.default.addObserver(self, selector: #selector(favoriteFile(_:)), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterFavoriteFile), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(deleteFile(_:)), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterDeleteFile), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(renameFile(_:)), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterRenameFile), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(moveFile(_:)), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterMoveFile), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(changeTheming), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterChangeTheming), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(viewUnload), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterMenuDetailClose), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(searchText), name: NSNotification.Name(rawValue: NCBrandGlobal.shared.notificationCenterMenuSearchTextPDF), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(handlePageChange), name: Notification.Name.PDFViewPageChanged, object: nil)
changeTheming()
pdfView = PDFView.init(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height))
pdfDocument = PDFDocument(url: URL(fileURLWithPath: filePath))
pdfView.document = pdfDocument
pdfView.backgroundColor = NCBrandColor.shared.backgroundView
pdfView.displayMode = .singlePageContinuous
pdfView.autoScales = true
pdfView.displayDirection = .horizontal
pdfView.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleTopMargin, .flexibleBottomMargin]
pdfView.usePageViewController(true, withViewOptions: nil)
view.addSubview(pdfView)
pdfThumbnailView.translatesAutoresizingMaskIntoConstraints = false
pdfThumbnailView.pdfView = pdfView
pdfThumbnailView.layoutMode = .horizontal
pdfThumbnailView.thumbnailSize = CGSize(width: 40, height: thumbnailViewHeight)
pdfThumbnailView.backgroundColor = .clear
//pdfThumbnailView.layer.shadowOffset.height = -5
//pdfThumbnailView.layer.shadowOpacity = 0.25
view.addSubview(pdfThumbnailView)
pdfThumbnailView.heightAnchor.constraint(equalToConstant: thumbnailViewHeight).isActive = true
pdfThumbnailView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
pdfThumbnailView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
pdfThumbnailView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
pageView.translatesAutoresizingMaskIntoConstraints = false
pageView.layer.cornerRadius = 10
pageView.backgroundColor = UIColor.gray.withAlphaComponent(0.3)
view.addSubview(pageView)
pageView.heightAnchor.constraint(equalToConstant: 30).isActive = true
pageViewWidthAnchor = pageView.widthAnchor.constraint(equalToConstant: 10)
pageViewWidthAnchor?.isActive = true
pageView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 4).isActive = true
pageView.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor, constant: 7).isActive = true
pageViewLabel.translatesAutoresizingMaskIntoConstraints = false
pageViewLabel.textAlignment = .center
pageViewLabel.textColor = .gray
pageView.addSubview(pageViewLabel)
pageViewLabel.leftAnchor.constraint(equalTo: pageView.leftAnchor).isActive = true
pageViewLabel.rightAnchor.constraint(equalTo: pageView.rightAnchor).isActive = true
pageViewLabel.topAnchor.constraint(equalTo: pageView.topAnchor).isActive = true
pageViewLabel.bottomAnchor.constraint(equalTo: pageView.bottomAnchor).isActive = true
pdfView.layoutIfNeeded()
handlePageChange()
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(didTap(_:)))
tapGesture.numberOfTapsRequired = 1
pdfView.addGestureRecognizer(tapGesture)
// recognize single / double tap
for gesture in pdfView.gestureRecognizers! {
tapGesture.require(toFail:gesture)
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationItem.rightBarButtonItem = UIBarButtonItem.init(image: UIImage(named: "more")!.image(color: NCBrandColor.shared.textView, size: 25), style: .plain, target: self, action: #selector(self.openMenuMore))
navigationController?.navigationBar.prefersLargeTitles = true
navigationItem.title = metadata.fileNameView
appDelegate.activeViewController = self
}
@objc func viewUnload() {
navigationController?.popViewController(animated: true)
}
//MARK: - NotificationCenter
@objc func favoriteFile(_ notification: NSNotification) {
if self.view?.window == nil { return }
if let userInfo = notification.userInfo as NSDictionary? {
if let ocId = userInfo["ocId"] as? String, let metadata = NCManageDatabase.shared.getMetadataFromOcId(ocId) {
if metadata.ocId == self.metadata.ocId {
self.metadata = metadata
}
}
}
}
@objc func moveFile(_ notification: NSNotification) {
if let userInfo = notification.userInfo as NSDictionary? {
if let ocId = userInfo["ocId"] as? String, let ocIdNew = userInfo["ocIdNew"] as? String, let metadata = NCManageDatabase.shared.getMetadataFromOcId(ocId), let metadataNew = NCManageDatabase.shared.getMetadataFromOcId(ocIdNew) {
if metadata.ocId == self.metadata.ocId {
self.metadata = metadataNew
}
}
}
}
@objc func deleteFile(_ notification: NSNotification) {
if let userInfo = notification.userInfo as NSDictionary? {
if let ocId = userInfo["OcId"] as? String {
if ocId == self.metadata.ocId {
viewUnload()
}
}
}
}
@objc func renameFile(_ notification: NSNotification) {
if let userInfo = notification.userInfo as NSDictionary? {
if let ocId = userInfo["ocId"] as? String, let metadata = NCManageDatabase.shared.getMetadataFromOcId(ocId) {
if metadata.ocId == self.metadata.ocId {
self.metadata = metadata
navigationItem.title = metadata.fileNameView
}
}
}
}
@objc func changeTheming() {
if navigationController?.isNavigationBarHidden == false {
pdfView.backgroundColor = NCBrandColor.shared.backgroundView
}
}
@objc func handlePageChange() {
guard let curPage = pdfView.currentPage?.pageRef?.pageNumber else { pageView.alpha = 0; return }
guard let totalPages = pdfView.document?.pageCount else { return }
pageView.alpha = 1
pageViewLabel.text = String(curPage) + " " + NSLocalizedString("_of_", comment: "") + " " + String(totalPages)
pageViewWidthAnchor?.constant = pageViewLabel.intrinsicContentSize.width + 10
UIView.animate(withDuration: 1.0, delay: 3.0, animations: {
self.pageView.alpha = 0
})
}
//MARK: - Action
@objc func openMenuMore() {
NCViewer.shared.toggleMoreMenu(viewController: self, metadata: metadata, webView: false)
}
//MARK: - Gesture Recognizer
@objc func didTap(_ recognizer: UITapGestureRecognizer) {
if navigationController?.isNavigationBarHidden ?? false {
navigationController?.setNavigationBarHidden(false, animated: false)
pdfThumbnailView.isHidden = false
pdfView.backgroundColor = NCBrandColor.shared.backgroundView
} else {
let point = recognizer.location(in: pdfView)
if point.y > pdfView.frame.height - thumbnailViewHeight { return }
navigationController?.setNavigationBarHidden(true, animated: false)
pdfThumbnailView.isHidden = true
pdfView.backgroundColor = .black
}
handlePageChange()
}
//MARK: - Search
@objc func searchText() {
let viewerPDFSearch = UIStoryboard.init(name: "NCViewerPDF", bundle: nil).instantiateViewController(withIdentifier: "NCViewerPDFSearch") as! NCViewerPDFSearch
viewerPDFSearch.delegate = self
viewerPDFSearch.pdfDocument = pdfDocument
let navigaionController = UINavigationController.init(rootViewController: viewerPDFSearch)
self.present(navigaionController, animated: true)
}
func searchPdfSelection(_ pdfSelection: PDFSelection) {
pdfSelection.color = .yellow
pdfView.currentSelection = pdfSelection
pdfView.go(to: pdfSelection)
}
}