PDF_Office/PDF Office/PDF Master/Class/Home/ViewController/KMHomeHistoryFileViewController.swift

//
//  KMHomeHistoryFileViewController.swift
//  PDF Master
//
//  Created by wanjun on 2022/10/28.
//

import Cocoa

public enum HistoryFileShowMode : Int {
    case Thumbnail = 0
    case List
}

@objc protocol KMHomeHistoryFileViewControllerDelegate {
    @objc optional func historyFileViewController(_ viewController: KMHomeHistoryFileViewController, deleteDocuments indexPaths: [URL])
    @objc optional func historyFileViewController(_ viewController: KMHomeHistoryFileViewController, didSelectItemsAt indexPaths: [URL])
}

class KMHomeHistoryFileTableviewCell: NSTableCellView {
    @IBOutlet weak var fileImageView: NSImageView!
    @IBOutlet weak var documentName: NSTextField!
    @IBOutlet weak var documentType: NSTextField!
    @IBOutlet weak var documentSize: NSTextField!
    @IBOutlet weak var moreButton: NSButton!
    @IBOutlet weak var lastModificationTime: NSTextField!
    @IBOutlet weak var mainBox: KMBox!
    var file: URL?
    var selectUrls: [URL] = []
    var isSelect: Bool = false
    var currentWindowController: NSWindowController?

    // MARK: Init
    
    override func awakeFromNib() {
        super.awakeFromNib()
                
        mainBox.menu = tableCellMenu
        mainBox.canDoubleClick = true
        documentName.maximumNumberOfLines = 1
        mainBox.moveCallback = { [unowned self](mouseEntered: Bool, mouseBox: KMBox) -> Void in
            if !self.isSelect {
                if mouseEntered {
                    self.documentName.textColor = NSColor(hex: "#252629")
                    self.documentType.textColor = NSColor(hex: "#94989C")
                    self.documentSize.textColor = NSColor(hex: "#94989C")
                    self.lastModificationTime.textColor = NSColor(hex: "#94989C")
                    self.mainBox.fillColor = NSColor(hex: "#EDEEF0")
                    self.mainBox.borderWidth = 0
                    self.mainBox.cornerRadius = 4.0
                } else {
                    self.documentName.textColor = NSColor(hex: "#252629")
                    self.documentType.textColor = NSColor(hex: "#94989C")
                    self.documentSize.textColor = NSColor(hex: "#94989C")
                    self.lastModificationTime.textColor = NSColor(hex: "#94989C")
                    self.mainBox.fillColor = .clear
                    self.mainBox.borderWidth = 0
                    self.mainBox.cornerRadius = 0.0
                }
            }
        }
    }
    
    // MARK: Private Methods
    
    func initializeUI(_ url: URL) -> Void {
        file = url
        let attrib = try? FileManager.default.attributesOfItem(atPath: url.path) as? Dictionary<FileAttributeKey , Any>
        if attrib != nil {
            let dateFormatter: DateFormatter = DateFormatter.init()
            let fileDate: Date = attrib![FileAttributeKey(rawValue: "NSFileModificationDate")] as! Date
            var fileTime: String = ""
            if fileDate.isToday() {
                dateFormatter.dateFormat = "HH:mm"
            } else if self.isDateInCurrentWeek(fileDate) {
                dateFormatter.dateFormat = "EEE, HH:mm"
            } else {
                dateFormatter.dateFormat = "MMM d, yyyy"
            }
            
            let fileName = url.lastPathComponent
//            let fileType = url.pathExtension.isEmpty ? "" : url.pathExtension
            let fileType = ""
            let sizeFloat: Float = attrib![FileAttributeKey(rawValue: "NSFileSize")] as? Float ?? 0.0
            let fileSize = fileSizeString(sizeFloat).isEmpty ? "" : fileSizeString(sizeFloat)
            let lastTime = dateFormatter.string(from: fileDate)
            if fileDate.isToday() {
                fileTime = String(format: "%@, %@", NSLocalizedString("Today", comment: ""), lastTime)
            } else if isDateInCurrentWeek(fileDate) {
                fileTime = lastTime
            } else {
                fileTime = lastTime
            }

            let paragraphStyle = NSMutableParagraphStyle()
            paragraphStyle.lineSpacing = 22.0
            documentName.stringValue = fileName
    //        documentName.attributedStringValue = NSAttributedString(string: fileName, attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
            documentType.attributedStringValue = NSAttributedString(string: fileType, attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
            documentSize.attributedStringValue = NSAttributedString(string: fileSize, attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
            lastModificationTime.attributedStringValue = NSAttributedString(string: fileTime, attributes: [NSAttributedString.Key.paragraphStyle: paragraphStyle])
            mainBox.toolTip = fileName
            
            if selectUrls.contains(url) {
                isSelect = true
                mainBox.fillColor = NSColor(hex: "#CED0D4", alpha: 0.6)
                mainBox.borderWidth = 1.0
                mainBox.borderColor = NSColor(hex: "#CED0D4")
                mainBox.cornerRadius = 4.0
            } else {
                isSelect = false
                mainBox.fillColor = .clear
                mainBox.borderWidth = 0.0
                mainBox.cornerRadius = 0.0
            }
            documentName.backgroundColor = .clear
            documentName.textColor = NSColor(hex: "#252629")
            documentName.font = NSFont(name: "SFProText-Regular", size: 14)
            documentType.textColor = NSColor(hex: "#94989C")
            documentSize.textColor = NSColor(hex: "#94989C")
            documentName.backgroundColor = .clear
            lastModificationTime.textColor = NSColor(hex: "#94989C")
            lastModificationTime.backgroundColor = .clear
            moreButton.image = NSImage(named: "KMHomeMoreTools")
            let image: NSImage = NSImage.previewForFile(path: url, ofSize: fileImageView.frame.size, asIcon: true) ?? NSImage()
            fileImageView.image = image
        }
    }
    
    func highlightCell(_ rows: Array<Int>, _ row: Int) -> Void {
        for i in rows {
            if i == row {
                mainBox.fillColor = NSColor(hex: "#CED0D4", alpha: 0.6)
                mainBox.borderWidth = 1.0
                mainBox.borderColor = NSColor(hex: "#CED0D4")
            }
        }
    }
    
    func fileSizeString(_ fSize: Float) -> String {
        let fileSize = fSize / 1024
        let size = fileSize >= 1024 ? (fileSize < 1048576 ? fileSize/1024 : fileSize/1048576.0) : fileSize
        let unit = fileSize >= 1024 ? (fileSize < 1048576 ? "M" : "G") : "K"
        return String(format: "%0.1f %@", size, unit)
    }
    
    func isSameWeek (withDate date: Date) -> Bool {
        let currentWeekOfYear = getWeekOfYear(date: Date.init())
        let targetWeekOfYear = getWeekOfYear(date: date)
        if targetWeekOfYear == currentWeekOfYear {
            return false
        } else {
            return true
        }
    }
    
    func isDateInCurrentWeek(_ date: Date) -> Bool {
        let calendar = Calendar.current
        // 获取当前日期的星期几
        let weekday = calendar.component(.weekday, from: Date())
        // 获取一周的第一天（周日）的日期
        let firstDayOfWeek = calendar.date(byAdding: .day, value: -weekday, to: Date())!
        // 获取一周的最后一天（下周的第一天）的日期
        let lastDayOfWeek = calendar.date(byAdding: .day, value: 7, to: firstDayOfWeek)!
        // 判断日期是否在当前周的范围内
        return date > firstDayOfWeek && date < lastDayOfWeek
    }
     
    func getWeekOfYear(date: Date) -> Int {
        let components = Calendar.current.dateComponents([Calendar.Component.weekOfYear], from: date)
        return components.weekOfYear ?? 0
    }
    
    //MARK: update
        
    // MARK: Menu
    lazy var tableCellMenu: NSMenu = {
        let tableCellMenu = NSMenu()
        var item = NSMenuItem()
        item.title = NSLocalizedString("Show in Finder", comment: "")
        item.action = #selector(buttonItemClick_ShowPath)
        tableCellMenu.addItem(item)
        item = NSMenuItem()
        item.title = NSLocalizedString("Remove from Recents", comment: "")
        item.action = #selector(buttonItemClick_ClosePath)
        tableCellMenu.addItem(item)
        return tableCellMenu
    }()
    
    // MARK: Action
    
    @IBAction func moreButtonAction(_ sender: NSButton) {
        let menu = NSMenu()
        var item = menu.addItem(withTitle: NSLocalizedString("Show in Finder", comment: ""), action: #selector(buttonItemClick_ShowPath(_:)), keyEquivalent: "")
        item.target = self
        item = menu.addItem(withTitle: NSLocalizedString("Remove from Recents", comment: ""), action: #selector(buttonItemClick_ClosePath(_:)), keyEquivalent: "")
        item.target = self
//        menu.popUp(positioning: menu.item(at: 0), at: CGPointMake(CGRectGetMaxX(sender.frame)-35, sender.frame.origin.y+10), in: self)
        menu.popUp(positioning: menu.item(at: 0), at: CGPointMake(CGRectGetMaxX(sender.frame), sender.frame.origin.y), in: self)
    }
    
    @IBAction func buttonItemClick_ShowPath(_ sender: Any) {
        if FileManager.default.fileExists(atPath: file!.path) {
            NSWorkspace.shared.activateFileViewerSelecting([file!])
        }
    }
    
    @IBAction func buttonItemClick_ClosePath(_ sender: Any) {
        var selects: [URL] = []
        if selectUrls.count > 0 {
            for selecturl in self.selectUrls {
                selects.append(selecturl)
            }
        } else {
            selects.append(file!)
        }
        
        if UserDefaults.standard.bool(forKey: "kHistoryDeleteNOReminderKey") {
            historyFileDeleteAction(selects)
        } else {
            let historyFileDeleteVC: KMHistoryFileDeleteWindowController = KMHistoryFileDeleteWindowController.init(windowNibName: NSNib.Name("KMHistoryFileDeleteWindowController"))
            historyFileDeleteVC.indexPaths = selects
            self.currentWindowController = historyFileDeleteVC
            historyFileDeleteVC.deleteCallback = { [weak self](indexPaths: [URL], windowController: KMHistoryFileDeleteWindowController) -> Void in
                if self != nil {
                    self?.currentWindowController = nil
                    self!.historyFileDeleteAction(indexPaths)
                }
            }
            self.window?.beginSheet(historyFileDeleteVC.window!)
        }
    }
    
    func historyFileDeleteAction(_ indexPaths: [URL]) -> Void {
        let urls: Array<URL> = NSDocumentController.shared.recentDocumentURLs
        NSDocumentController.shared.clearRecentDocuments(nil)
        DispatchQueue.main.asyncAfter(deadline: .now()) { [self] in
            for (_, url) in urls.enumerated() {
                if !indexPaths.contains(url) {
                    NSDocumentController.shared.noteNewRecentDocumentURL(url)
                }
            }
            NotificationCenter.default.post(name: NSNotification.Name.init(rawValue: "KMHomeFileRectChange"), object: self.window)
        }
    }
}

class KMHomeHistoryFileViewController: NSViewController, NSCollectionViewDelegate, NSCollectionViewDataSource, NSCollectionViewDelegateFlowLayout, NSTableViewDelegate, NSTableViewDataSource {

    @IBOutlet weak var historyFileLabel: NSTextField!
    @IBOutlet weak var modeBox: NSBox!
    @IBOutlet weak var modeBoxHeight: NSLayoutConstraint!
    @IBOutlet weak var thumbnailBox: KMBox!
    @IBOutlet weak var thumbnailImageView: NSImageView!
    @IBOutlet weak var listBox: KMBox!
    @IBOutlet weak var listImageView: NSImageView!
    @IBOutlet weak var deleteBox: KMBox!
    @IBOutlet weak var deleteBoxHeight: NSLayoutConstraint!
    @IBOutlet weak var deleteImageView: NSImageView!
    @IBOutlet weak var thumbnailSCrollView: NSScrollView!
    @IBOutlet weak var historyFileCollectionView: KMHistoryFileCollectionView!
    @IBOutlet weak var listScrollView: NSScrollView!
    @IBOutlet weak var historyFileTableView: KMHistoryFileTableView!
    
    @IBOutlet weak var emptyMainBox: NSBox!
    @IBOutlet weak var emptyBox: NSBox!
    @IBOutlet weak var emptyImageView: NSImageView!
    @IBOutlet weak var emptyTitleLabel: NSTextField!
    @IBOutlet weak var emptySubtitleLabel: NSTextField!
    @IBOutlet weak var emptyHovBox: KMMoveBox!
    
    var files: [URL] = []
    var selectFiles: [URL] = []
    var selectFiles_shift: [Int] = []

    var showMode: HistoryFileShowMode!
    open weak var delete: KMHomeHistoryFileViewControllerDelegate?
    
    var allowMultipleChoices_cmd: Bool!
    var allowMultipleChoices_shift: Bool!
    var multipleChoices: [KMBox] = []
    var multipleChoicesInts: [Int] = []
    
    var deleteButtonVC: KMDesignButton!
    // 是否强制刷新
    var isForceReload = false
    
    // MARK: Init
    
    override func viewWillAppear() {
        print("viewWillAppear")
        self.refreshMode()
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        
        deleteButtonVC = KMDesignButton.init(withType: .Image)
        
        historyFileCollectionView.register(KMHistoryFileCollectionViewItem.self, forItemWithIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileCollectionViewItem"))
                        
        initializeUI()
        initLocalization()
        allowMultipleChoices_cmd = false
        allowMultipleChoices_shift = false

//        NotificationCenter.default.addObserver(self, selector: #selector(willBecomeActive), name: NSNotification.Name(rawValue: "KMApplicationWillBecomeActive"), object: nil)
        
        if UserDefaults.standard.bool(forKey: "kFileListViewListModeKey") {
            showMode = .List
        } else {
            showMode = .Thumbnail
        }
        refreshMode()
        self.listBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if self != nil {
                if downEntered {
                    if (self!.showMode == .Thumbnail) {
                        self!.showMode = .List
                        self!.refreshMode()
                    }
                }
            }
        }
        self.thumbnailBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if self != nil {
                if downEntered {
                    if (self!.showMode == .List) {
                        self!.showMode = .Thumbnail
                        self!.refreshMode()
                    }
                }
            }
        }
        
        self.deleteBox.downCallback = { [weak self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if self != nil {
                if self!.deleteButtonVC.enabled {
                    if downEntered  {
                        self!.deleteButtonVC.state = .Sel
                    } else {
                        self!.deleteButtonVC.state = .Norm
                    }
                    self!.deleteButtonVC.updateUI()
                }
            }
        }
        
        self.emptyHovBox.move =  { [unowned self](mouseEntered: Bool) -> Void in
            if mouseEntered {
                emptyImageView.image = NSImage(named: "icon_empty_add_hov")
            } else {
                emptyImageView.image = NSImage(named: "icon_empty_add_norm")
            }
        }
    }
    
    override func viewDidAppear() {
        super.viewDidAppear()
        
        if (self.isForceReload) {
            self.isForceReload = false
            self.reloadData()
            return
        }
        
        for url in NSDocumentController.shared.recentDocumentURLs {
            if FileManager.default.fileExists(atPath: url.path) {
                if !self.files.contains(url) {
                    reloadData()
                }
            }
        }
    }
    
    func initializeUI() {
        deleteBox.fillColor = .clear
        deleteBox.contentView = deleteButtonVC.view
        deleteButtonVC.target = self
        deleteButtonVC.action = #selector(deleteAction(_:))
        deleteButtonVC.image = NSImage(named: "icon_btn_clear_false_norm")!
        deleteButtonVC.button(type: .Sec, size: .m, height: deleteBoxHeight)

        historyFileLabel.font = NSFont(name: "SFProText-Semibold", size: 20)
        historyFileLabel.textColor = NSColor(red: 37/255.0, green: 38/255.0, blue: 41/255.0, alpha: 1.0)
        modeBox.fillColor = KMDesignToken.shared.fill(withToken: "segmented.bg")
        modeBox.cornerRadius = KMDesignToken.shared.borderRadius(withToken: "segmented.bg").stringToCGFloat()
        
        emptyImageView.image = NSImage(named: "icon_empty_add_norm")
        emptyTitleLabel.textColor = NSColor(hex: "#616469")
        emptyTitleLabel.font = NSFont(name: "SFProText-Regular", size: 14.0)
        emptySubtitleLabel.textColor = NSColor(hex: "#94989C")
        emptySubtitleLabel.font = NSFont(name: "SFProText-Regular", size: 12.0)
    }
    
    func initLocalization() {
        let fastToolParagraphStyle = NSMutableParagraphStyle()
        fastToolParagraphStyle.lineSpacing = 28.0
        historyFileLabel.attributedStringValue = NSAttributedString(string: NSLocalizedString("Recent", comment: ""), attributes: [NSAttributedString.Key.paragraphStyle: fastToolParagraphStyle])

        emptyTitleLabel.stringValue = NSLocalizedString("No recently opened files", comment: "")
        emptySubtitleLabel.stringValue = NSLocalizedString("Click to open the file or drag the file directly here to open the file.", comment: "")
    }
    
    // MARK: Get && Set

    // MARK: Private Methods
    
    func refreshMode() {
        switch showMode {
        case .Thumbnail:
            listBox.fillColor = KMDesignToken.shared.fill(withToken: "segmented.bg-item.unsel")
            listBox.cornerRadius = KMDesignToken.shared.borderRadius(withToken: "segmented.bg").stringToCGFloat()
            thumbnailBox.fillColor = KMDesignToken.shared.fill(withToken: "segmented.bg-item.sel")
            thumbnailBox.cornerRadius = KMDesignToken.shared.borderRadius(withToken: "segmented.bg").stringToCGFloat()
            listScrollView.isHidden = true
            thumbnailSCrollView.isHidden = false
            
            UserDefaults.standard.setValue(false, forKey: "kFileListViewListModeKey")
            break
        case .List:
            listBox.fillColor = KMDesignToken.shared.fill(withToken: "segmented.bg-item.sel")
            listBox.cornerRadius = KMDesignToken.shared.borderRadius(withToken: "segmented.bg").stringToCGFloat()
            thumbnailBox.fillColor = KMDesignToken.shared.fill(withToken: "segmented.bg-item.unsel")
            thumbnailBox.cornerRadius = KMDesignToken.shared.borderRadius(withToken: "segmented.bg").stringToCGFloat()
            listScrollView.isHidden = false
            thumbnailSCrollView.isHidden = true

            UserDefaults.standard.setValue(true, forKey: "kFileListViewListModeKey")
            break
        default:
            break
        }
        
        UserDefaults.standard.synchronize()
        reloadData()
    }
    
    func reloadData() -> Void {
        files.removeAll()
        
        for url in NSDocumentController.shared.recentDocumentURLs {
            if FileManager.default.fileExists(atPath: url.path) {
                self.files.append(url)
            }
        }
        
        //考虑多个文件时如果筛选最后修改时间，那刚开启的文件可能在列表其他的位置
//        if self.files.count > 0 {
//            var dateArray: [Int: URL] = [:]
//            for index in 0..<self.files.count {
//                let url = self.files[index]
//                let attrib = try? FileManager.default.attributesOfItem(atPath: url.path) as? Dictionary<FileAttributeKey , Any>
//                let fileDate: Date = attrib![FileAttributeKey(rawValue: "NSFileModificationDate")] as! Date
//                let timeInterval = fileDate.timeIntervalSince1970
//                dateArray.updateValue(url, forKey: Int(timeInterval))
//            }
//
//            let sortedKeys = dateArray.keys.sorted(by: >)
//
//            files.removeAll()
//            for key in sortedKeys {
//                files.append(dateArray[key]!)
//                print("\(key): \(dateArray[key]!)")
//            }
//        }
        
        let fileNumber = KMPreferenceManager.shared.getData(forKey: KMPreference.documentMaximunDisplayNumberKey) as? Int ?? 10
        if fileNumber <= files.count {
            let arr1 = files.prefix(fileNumber)
            self.files = Array(arr1)
        }
        
        thumbnailSCrollView.isHidden = true
        listScrollView.isHidden = true
        emptyMainBox.isHidden = true
        if files.count > 0 {
            deleteButtonVC.enabled = true
            deleteButtonVC.state = .Norm
            if showMode == .Thumbnail {
                thumbnailSCrollView.isHidden = false

                historyFileCollectionView.reloadData()
            } else {
                listScrollView.isHidden = false

                historyFileTableView.reloadData()
            }
        } else {
            deleteButtonVC.enabled = false
            deleteButtonVC.state = .Disabled
            emptyMainBox.isHidden = false
            
            historyFileCollectionView.reloadData()
            historyFileTableView.reloadData()
        }
        deleteButtonVC.updateUI()
    }
    
    func multipleChoicesAction(choiceBox box: KMBox, choiceRow row: Int) -> Void {
        if allowMultipleChoices_cmd {
            if multipleChoices.contains(box) {
                box.fillColor = .clear
                multipleChoices.removeObject(box)
            } else {
                multipleChoices.append(box)
            }
            
            for box in multipleChoices {
                box.fillColor = NSColor(red: 37/255.0, green: 139/255.0, blue: 251/255.0, alpha: 1.0)
            }
        } else if allowMultipleChoices_shift {
            
            for box in multipleChoices {
                box.fillColor = NSColor(red: 37/255.0, green: 139/255.0, blue: 251/255.0, alpha: 1.0)
            }
        } else {
            for iBox in multipleChoices {
                iBox.fillColor = .clear
            }
            multipleChoices.removeAll()
            multipleChoices.append(box)
            
            box.fillColor = NSColor(red: 37/255.0, green: 139/255.0, blue: 251/255.0, alpha: 1.0)
        }
        multipleChoicesIntsAction(choiceRow: row)
    }
    
    func multipleChoicesIntsAction(choiceRow row: Int) -> Void {
        if allowMultipleChoices_cmd {
            if multipleChoicesInts.contains(row) {
                multipleChoicesInts.removeObject(row)
            } else {
                multipleChoicesInts.append(row)
            }
        } else if  allowMultipleChoices_shift {
            
        } else {
            multipleChoicesInts.removeAll()
            multipleChoicesInts.append(row)
        }
    }
    
    override func flagsChanged(with event: NSEvent) {
        super.flagsChanged(with: event)
        if event.type == .flagsChanged {
            if event.keyCode == 55 { // cmd
                if allowMultipleChoices_cmd {
                    selectFiles_shift.removeAll()
                    selectFiles.removeAll()
                    allowMultipleChoices_cmd = false
                } else {
                    allowMultipleChoices_cmd = true
                    allowMultipleChoices_shift = false
                }
            } else if event.keyCode == 56 { // shift
                if allowMultipleChoices_shift {
                    selectFiles_shift.removeAll()
                    selectFiles.removeAll()
                    allowMultipleChoices_shift = false
                } else {
                    allowMultipleChoices_shift = true
                    allowMultipleChoices_cmd = false
                }
            }
        }
    }
    
//    @objc func willBecomeActive() {
//        self.reloadData()
//    }

    // MARK: Action
    
    @IBAction func deleteAction(_ sender: NSButton) -> Void {
        if selectFiles.count == 0 {
            for url in NSDocumentController.shared.recentDocumentURLs {
                if FileManager.default.fileExists(atPath: url.path) {
                    selectFiles.append(url)
                }
            }
            self.delete?.historyFileViewController!(self, deleteDocuments: selectFiles)
        } else if selectFiles.count > 0 {
//            let urls: Array<URL> = NSDocumentController.shared.recentDocumentURLs
//            NSDocumentController.shared.clearRecentDocuments(nil)
//            DispatchQueue.main.asyncAfter(deadline: .now()) { [self] in
//                for (_, url) in urls.enumerated() {
//                    if !selectFiles.contains(url) {
//                        NSDocumentController.shared.noteNewRecentDocumentURL(url)
//                    }
//                }
//                NotificationCenter.default.post(name: NSNotification.Name.init(rawValue: "KMHomeFileRectChange"), object: NSApp.mainWindow)
//            }
            self.delete?.historyFileViewController!(self, deleteDocuments: selectFiles)
        }
    }
    
    @IBAction func openFileAction(_ sender: NSButton) {
        let openPanel = NSOpenPanel()
        openPanel.allowedFileTypes = ["pdf", "PDF"]
        openPanel.allowsMultipleSelection = true
        openPanel.beginSheetModal(for: self.view.window!) { result in
            if result == .OK {
                for url in openPanel.urls {
                    if !url.path.isPDFValid() {
                        let alert = NSAlert()
                        alert.alertStyle = .critical
                        alert.messageText = NSLocalizedString("An error occurred while opening this document. The file is damaged and could not be repaired.", comment: "")
                        alert.runModal()
                        return
                    }
                    NSDocumentController.shared.openDocument(withContentsOf: url, display: true) { document, documentWasAlreadyOpen, error in
                        if error != nil {
                            NSApp.presentError(error!)
                        } else {
                            
                        }
                    }
                }
            }
        }
    }
    
    // MARK: NSCollectionViewDataSource
    
    func collectionView(_ collectionView: NSCollectionView, numberOfItemsInSection section: Int) -> Int {
        return files.count
    }
     
    func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
        if collectionView.isEqual(to: historyFileCollectionView) {
            let item: KMHistoryFileCollectionViewItem = collectionView.makeItem(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "KMHistoryFileCollectionViewItem"), for: indexPath) as! KMHistoryFileCollectionViewItem
            if (indexPath.item > files.count) {
                return item
            }
            let i: Int = indexPath.item
            let url: URL = files[i] as! URL

            item.selectUrls = selectFiles
            item.refreshUI(url)
            item.mainBox.downCallback = { [unowned self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
                if self != nil {
                    if downEntered {
                        if self.allowMultipleChoices_shift {
                            if self.selectFiles_shift.count == 0 {
                                self.selectFiles.append(url)
                                self.selectFiles_shift.append(i)
                            } else if self.selectFiles_shift.count == 1 {
                                let first = self.selectFiles_shift[0] as Int
                                self.selectFiles.removeAll()
                                if first > i {
                                    for path in self.files[i...first] {
                                        self.selectFiles.append(path as! URL)
                                    }
                                } else {
                                    for path in self.files[first...i] {
                                        self.selectFiles.append(path as! URL)
                                    }
                                }
                                self.selectFiles_shift.append(i)
                            } else if self.selectFiles_shift.count == 2 {
                                let first = self.selectFiles_shift[0] as Int
                                self.selectFiles.removeAll()
                                if first > i {
                                    for path in self.files[i...first] {
                                        self.selectFiles.append(path as! URL)
                                    }
                                } else {
                                    for path in self.files[first...i] {
                                        self.selectFiles.append(path as! URL)
                                    }
                                }
                                self.selectFiles_shift[1] = i
                            }
                        } else if self.allowMultipleChoices_cmd {
                            if self.selectFiles.contains(url) {
                                self.selectFiles.removeObject(url)
                            } else {
                                self.selectFiles.append(url)
                            }
                            if self.selectFiles_shift.contains(i) {
                                self.selectFiles_shift.removeObject(i)
                            } else {
                                self.selectFiles_shift.append(i)
                            }
                        } else {
                            self.selectFiles.removeAll()
                            self.selectFiles_shift.removeAll()
                            self.selectFiles.append(url)
                            self.selectFiles_shift.append(i)
                        }
                        collectionView.reloadData()
                    }
                }
            }
            item.mainBox.doubleCallback = { [unowned self](downEntered: Bool, mouseBox: KMBox) -> Void in
                if self != nil {
                    if downEntered {
                        self.selectFiles.removeAll()
                        
                        var indexs: [URL] = []
                        let index: URL = self.files[i] as! URL
                        indexs.append(index)
                        self.delete?.historyFileViewController!(self, didSelectItemsAt: indexs)
                    }
                }
            }
            return item
        }
        return NSCollectionViewItem.init()
    }
    
    // MARK: NSCollectionViewDelegate
    
    func collectionView(_ collectionView: NSCollectionView, didSelectItemsAt indexPaths: Set<IndexPath>) {
        
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
        if collectionView.isEqual(to: historyFileCollectionView) {
            return CGSize(width: 226, height: 248)
        }
        return CGSize(width: 226, height: 248)
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
        return 16
    }
    
    func collectionView(_ collectionView: NSCollectionView, layout collectionViewLayout: NSCollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
        return 16
    }
    
    // MARK: NSTableViewDelegate
    
    func tableView(_ tableView: NSTableView, heightOfRow row: Int) -> CGFloat {
        return 72.0;
    }
    
    func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
        let url: URL = files[row] as! URL
        let identifier = tableColumn?.identifier
        let cellView: KMHomeHistoryFileTableviewCell = tableView.makeView(withIdentifier:identifier!, owner: self) as! KMHomeHistoryFileTableviewCell
        cellView.selectUrls = selectFiles
        cellView.initializeUI(url)
        cellView.highlightCell(multipleChoicesInts, row)
        cellView.mainBox.downCallback = { [unowned self](downEntered: Bool, mouseBox: KMBox, event) -> Void in
            if self != nil {
                if downEntered {
                    if self.allowMultipleChoices_shift {
                        if self.selectFiles_shift.count == 0 {
                            self.selectFiles.append(url)
                            self.selectFiles_shift.append(row)
                        } else if self.selectFiles_shift.count == 1 {
                            let first = self.selectFiles_shift[0] as Int
                            self.selectFiles.removeAll()
                            if first > row {
                                for path in self.files[row...first] {
                                    self.selectFiles.append(path as! URL)
                                }
                            } else {
                                for path in self.files[first...row] {
                                    self.selectFiles.append(path as! URL)
                                }
                            }
                            self.selectFiles_shift.append(row)
                        } else if self.selectFiles_shift.count == 2 {
                            let first = self.selectFiles_shift[0] as Int
                            self.selectFiles.removeAll()
                            if first > row {
                                for path in self.files[row...first] {
                                    self.selectFiles.append(path as! URL)
                                }
                            } else {
                                for path in self.files[first...row] {
                                    self.selectFiles.append(path as! URL)
                                }
                            }
                            self.selectFiles_shift[1] = row
                        }
                    } else if self.allowMultipleChoices_cmd {
                        if self.selectFiles.contains(url) {
                            self.selectFiles.removeObject(url)
                        } else {
                            self.selectFiles.append(url)
                        }
                        if self.selectFiles_shift.contains(row) {
                            self.selectFiles_shift.removeObject(row)
                        } else {
                            self.selectFiles_shift.append(row)
                        }
                    } else {
                        self.selectFiles.removeAll()
                        self.selectFiles_shift.removeAll()
                        self.selectFiles.append(url)
                        self.selectFiles_shift.append(row)
                    }
                    tableView.reloadData()
                }
            }
        }
        
        cellView.mainBox.doubleCallback = { [unowned self](downEntered: Bool, mouseBox: KMBox) -> Void in
            if self != nil {
                if downEntered {
                    self.selectFiles.removeAll()

                    var indexs: [URL] = []
                    let index: URL = self.files[row] as! URL
                    indexs.append(index)
                    self.delete?.historyFileViewController!(self, didSelectItemsAt: indexs)
                }
            }
        }
        return cellView
    }
    
    @objc func tableViewDidScroll(_ notification: Notification) {
        self.historyFileTableView.reloadData()
    }
    
    // MARK: NSTableViewDataSource
    
    func numberOfRows(in tableView: NSTableView) -> Int {
        return files.count
    }
}