PDF_Office/PDF Office/PDF Master/KMClass/Convert/Base/KMConvertBaseWindowController.swift

//
//  KMConvertBaseWindowController.swift
//  PDF Reader Pro
//
//  Created by tangchao on 2022/12/5.
//

import PDFKit
import KMComponentLibrary

class KMConvertBaseWindowController: KMNBaseWindowController {
    @IBOutlet weak var titleLabel: NSTextField!
    
    @IBOutlet weak var leftBox: NSBox!
    @IBOutlet weak var rightScrollView: NSScrollView!
    
    @IBOutlet weak var batchButton: NSButton!
    @IBOutlet weak var canelBox: NSBox!
    @IBOutlet weak var convertBox: NSBox!
    
    @IBOutlet weak var rightBoxHeightConst: NSLayoutConstraint!
    
    private var cancelButton_: ComponentButton?
    private var convertButton_: ComponentButton?
    private var batchButton_: ComponentButton?
    
    var documentModel: KMDocumentModel?
    
    var currentPageIndex: Int = 1
    var pageRange = KMPageRange.all
    var pageRangeString: String = ""
    var settingView: KMConvertSettingView?
    
    var subType: Int = 0
    
    var fileExtension: String {
        get {
            return ""
        }
    }
    
    var progressController: SKProgressController?
    
    var pdfPreView: KMNPreView?
    
    private var convert: KMPDFConvert?
    private var ocrLanguage_: COCRLanguage = .english
    
    var oriDocumentUrl: URL?
    
    deinit {
        KMPrint("KMConvertBaseWindowController 已释放")
    }
    
    convenience init() {
        self.init(windowNibName: "KMConvertBaseWindowController")
    }
    
    override func awakeFromNib() {
        super.awakeFromNib()
        
        DispatchQueue.main.async {
            self.window?.makeFirstResponder(nil)
        }
    }
    
    override func windowDidLoad() {
        super.windowDidLoad()
        
        let preView = KMNPreView.createFromNib()
        leftBox.contentView = preView
        pdfPreView = preView
        pdfPreView?.contentInset = .init(top: 6, left: 6, bottom: 16, right: 6)
        
        
        if (documentModel != nil) {
            pdfPreView?.setFileUrl(self.documentModel!.documentURL, password: self.documentModel?.password)
            
            pdfPreView?.pdfView?.go(toPageIndex: self.documentModel?.currentIndex ?? 0, animated: false)
        }

        if let pageCount = pdfPreView?.pageCount {
            settingView?.pageCount = Int(pageCount)
        }
        
        pdfPreView?.reloadUI()
        updateViewColor()
    }
    
    override func updateUILanguage() {
        super.updateUILanguage()
        
        KMMainThreadExecute {
            self.batchButton_?.properties.buttonText = KMLocalizedString("Batch")
            self.batchButton_?.reloadData()
        }
    }
    
    override func initContentView() {
        super.initContentView()
        
        canelBox.fillColor = .clear
        cancelButton_?.keyEquivalent = KMKeyEquivalent.esc.string()
        
        convertBox.fillColor = .clear
        convertButton_ = ComponentButton()
        convertBox.contentView = convertButton_
        convertButton_?.properties = ComponentButtonProperty(type: .primary,
                                                          size: .s,
                                                          state: .normal,
                                                          isDisable: false,
                                                          buttonText: KMLocalizedString("Convert"))
        convertButton_?.setTarget(self, action: #selector(convertButtonAction))
        convertButton_?.keyEquivalent = KMKeyEquivalent.enter
        
        rightScrollView.hasVerticalScroller = false
        rightScrollView.hasHorizontalScroller = false
        
        titleLabel.font =  ComponentLibrary.shared.getFontFromKey("mac/body-m-medium")
        
        leftBox.borderWidth = 1
        leftBox.cornerRadius = ComponentLibrary.shared.getComponentValueFromKey("radius/m") as? CGFloat ?? 0

        let view = initSettingView()
        settingView = view
        rightScrollView.documentView = view
        rightScrollView.verticalScrollElasticity = .none
        rightScrollView.horizontalScrollElasticity = .none
        
        
        view?.km_add_inset_constraint()
        
        view?.currentLanguage = self.getCurrentLanguage()
        view?.lanugageDidSelected = { [weak self] value, _ in
            guard let index = value as? Int else {
                return
            }
            
            self?.saveLanugageSelectedIndex(index: index)
        }

        view?.pageRangeDidChange = { [weak self] pageRange in
            self?.pageRange = pageRange
            if (pageRange != .custom) {
                self?._updatePreView(pageRange: pageRange)
            }
        }
        view?.pageRangeDidInputFinishCallback = { [unowned self] string in
            self.pageRangeString = string
            let array = self.findSelectPage(pageRangeString: string)
            if array.count == 0 {
                let alert = NSAlert()
                alert.alertStyle = .warning
                alert.messageText = KMLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
                alert.runModal()
                
                self.settingView?.pageRangeItemView?.pageSizeVC?.stringValue = ""
            } else {
                self._updatePreView(pageRange: .custom, pageString: string)
            }
        }
        
        settingView?.tipView?.isHidden = true
        
        
        cancelButton_ = ComponentButton()
        cancelButton_?.properties = ComponentButtonProperty(type: .default_tertiary, size: .s, state: .normal, buttonText: KMLocalizedString("Cancel"))
        cancelButton_?.setTarget(self, action: #selector(cancelButtonAction))
        canelBox.contentView = cancelButton_
        
        batchButton.title = ""
        batchButton_ = ComponentButton()
        batchButton_?.properties = ComponentButtonProperty(type: .default_tertiary, size: .s, state: .normal, buttonText: KMLocalizedString("Batch"))
        batchButton_?.setTarget(self, action: #selector(batchButtonAction))
        batchButton.addSubview(self.batchButton_!)
        batchButton_?.frame = batchButton.bounds
        batchButton_?.autoresizingMask = [.width, .height]
    }
    
    func initSettingView() -> KMConvertSettingView? {
        let settingView = KMConvertSettingView.createFromNib()
        return settingView
    }
    
    public func initConvert() -> KMPDFConvert {
        return KMPDFConvert()
    }
    
    func setupContentHeight(height: CGFloat, animated: Bool = false) { // 370
        if (animated) {
            rightBoxHeightConst.animator().constant = height
        } else {
            rightBoxHeightConst.constant = height
        }
    }
    
    func updateViewColor() {
        KMMainThreadExecute {
            self.titleLabel.textColor = KMNColorTools.colorText_1()
            
            self.leftBox.fillColor = KMNColorTools.colorFill_4()
            self.leftBox.borderColor = KMNColorTools.colorBorder_4()
            self.pdfPreView?.pdfView?.backgroundColor = KMNColorTools.colorFill_4()
            
            self.settingView?.updateViewColor()
        }
    }
    
    @objc func batchButtonAction() {
        self._clearData()
        own_closeEndSheet()
    }
    
    @objc func cancelButtonAction() {
        self._clearData()
        
        own_closeEndSheet()
    }
    
    @objc func convertButtonAction() {
        window?.makeFirstResponder(nil)
        if (pageRange == .custom) {
            let array = findSelectPage(pageRangeString: pageRangeString)
            if (array.count <= 0) {
                window?.makeFirstResponder(settingView?.pageRangeItemView?.pageSizeVC?.textField)
                return
            }
        }
        
        var pages: [Int] = []
        let filePath = getConvertFileSavePath()
        if (FileManager.default.fileExists(atPath: filePath)) {
            try?FileManager.default.removeItem(atPath: filePath)
        }
        let document = pdfPreView?.pdfPreView.pdfView.document
        if ((document?.writeDecrypt(to: URL(fileURLWithPath: filePath)))!) {
            for i in 0 ..< document!.pageCount {
                pages.append(Int(i)+1)
            }
        }
        
        if (pages.count <= 0) {
            let alert = NSAlert()
            alert.alertStyle = .warning
            alert.messageText = KMLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
            alert.runModal()
            return
        }

        _convertButtonAction()
    }
    
    func convertModelAppendParams(convert: KMPDFConvert) -> () {
        if let isAllowOCR = settingView?.ocrEnabled {
            convert.isAllowOCR = isAllowOCR
            if let idx = settingView?.ocrItemView?.languageIndex {
                convert.ocrLanguage = _getOCRLanguage(idx: idx)
            }
        } else {
            convert.isAllowOCR = false
        }
    }
    
    func getConvertFileSavePath() -> String {
        var path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.applicationSupportDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last
        path?.append("/")
        path?.append(Bundle.main.bundleIdentifier!)
        if (FileManager.default.fileExists(atPath: path!) == false) {
            try?FileManager.default.createDirectory(atPath: path!, withIntermediateDirectories: false)
        }
        
        path?.append("/")
        path?.append("convert.pdf")
        
        return path!
    }
    
    func isValidPagesString(pagesString: String)-> Bool {
        var valid = false
        for ch in pagesString {
            if ch != "0" && ch != "1" && ch != "2" && ch != "3" && ch != "4" && ch != "5" && ch != "6" && ch != "7" && ch != "8" && ch != "9" && ch != "," && ch != "-" {
                valid = false
                break
            } else {
                valid = true
            }
        }
        
        return valid
    }
    
    func findSelectPage(pageRangeString: String) -> ([Int]) {
        if !isValidPagesString(pagesString: pageRangeString) {
            return []
        }
        
        var result: [Int] = []
        let array = pageRangeString.components(separatedBy: ",")
        for string in array {
            if string.isEmpty {
                return []
            } else {
                let pages = string .components(separatedBy: "-")
                if pages.count > 2 {
                    return []
                } else if pages.count == 1 {
                    let page = pages[0]
                    if page.isEmpty || Int(page)! > documentModel!.pageCount || Int(page)! == 0 {
                        return []
                    } else {
                        var hasSame: Bool = false
                        for i in result {
                            if i == Int(page)! {
                                hasSame = true
                                return []
                            }
                        }
                        if !hasSame {
                            result.append(Int(page)!)
                        }
                    }
                } else if pages.count == 2 {
                    let page1 = pages[0]
                    let page2 = pages[1]
                    if page1.isEmpty || page2.isEmpty || Int(page1)! >= Int(page2)! || Int(page2)! > documentModel!.pageCount || Int(page1)! == 0 {
                        return []
                    } else {
                        var hasSame: Bool = false
                        for i in Int(page1)! ... Int(page2)! {
                            for j in result {
                                if j == i {
                                    hasSame = true
                                    return []
                                }
                            }
                        }
                        if !hasSame {
                            for i in Int(page1)! ... Int(page2)! {
                                result.append(i)
                            }
                        }
                     }
                }
            }
        }
        
        return result
    }
    
    override func mouseDown(with event: NSEvent) {
        super.mouseDown(with: event)
        
        window?.makeFirstResponder(nil)
    }
    
    // MARK: - Private Methods
    
    private func _updatePreView(pageRange: KMPageRange, pageString: String = "") {
        let pages = getPages(pageRange, pageString: pageString)
        if (pages == nil || pages!.isEmpty) {
            let alert = NSAlert()
            alert.alertStyle = .warning
            alert.messageText = KMLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
            alert.runModal()
            return
        }
        var indexs = IndexSet()
        let document = pdfPreView?.pdfPreView.pdfView.document
        for i in 0 ..< document!.pageCount  {
            indexs.insert(IndexSet.Element(i))
        }
        document?.removePage(at: indexs)

        for page in pages! {
            document?.insertPageObject(page, at: document?.pageCount ?? 0)
        }
        DispatchQueue.main.async { [self] in
            let prePDFView = pdfPreView?.pdfPreView.pdfView
            prePDFView?.layoutDocumentView()
            prePDFView?.setNeedsDisplayForVisiblePages()
            prePDFView?.goToFirstPage(nil)

            currentPageIndex = 1
            pdfPreView?.reloadUI()
        }
    }
    
    private func getPageIndexs(_ pageRange: KMPageRange, pageString: String = "") -> IndexSet? {
        guard let pageCount = documentModel?.pageCount, pageCount > 0 else {
            return nil
        }
        
        var indexs = IndexSet()
        if (pageRange == .all) {
            for i in 0 ..< pageCount {
                indexs.insert(i)
            }
        } else if (pageRange == .odd) {
            for i in 0 ..< pageCount {
                if ((i % 2) == 1) {
                    continue
                }
                indexs.insert(i)
            }
        } else if (pageRange == .even) {
            for i in 0 ..< pageCount {
                if ((i % 2) == 0) {
                    continue
                }
                indexs.insert(i)
            }
        } else if (pageRange == .current) {
            if (currentPageIndex >= 1 && currentPageIndex <= pageCount) {
                indexs.insert(currentPageIndex-1)
            }
        } else if (pageRange == .custom) {
            let array = findSelectPage(pageRangeString: pageString)
            if array.count == 0 {

            } else {
                for i in 0 ..< array.count {
                    let index = array[i]
                    if (index > pageCount || index < 1) {
                        continue
                    }
                    indexs.insert(index-1)
                }
            }
        }
        return indexs
    }
    
    private func getPages(_ pageRange: KMPageRange, pageString: String = "") -> [CPDFPage]? {
        guard let pageCount = documentModel?.pageCount, pageCount > 0 else {
            return nil
        }
        
        var pages: [CPDFPage] = []
        if (pageRange == .all) {
            for i in 0 ..< pageCount {
                let page = documentModel!.document?.page(at: UInt(i))
                if (page == nil) {
                    continue
                }
                
                pages.append(page!)
            }
        } else if (pageRange == .odd) {
            for i in 0 ..< pageCount {
                if ((i % 2) == 1) {
                    continue
                }
                let page = documentModel!.document?.page(at: UInt(i))
                if (page == nil) {
                    continue
                }
                
                pages.append(page!)
            }
        } else if (pageRange == .even) {
            for i in 0 ..< pageCount {
                if ((i % 2) == 0) {
                    continue
                }
                let page = documentModel!.document?.page(at: UInt(i))
                if (page == nil) {
                    continue
                }
                
                pages.append(page!)
            }
        } else if (pageRange == .current) {
            let page = pdfPreView?.pdfPreView.pdfView.currentPage()
            if (page != nil) {
                pages.append(page!)
            }
        } else if (pageRange == .custom) {
            let array = findSelectPage(pageRangeString: pageString)
            if array.count == 0 {

            } else {
                for i in 0 ..< array.count {
                    let index = array[i]
                    if (index > pageCount || index < 1) {
                        continue
                    }
                    let page = documentModel?.document?.page(at: UInt(index-1))
                    if (page == nil) {
                        continue
                    }
                    
                    pages.append(page!)
                }
            }
        }
        return pages
    }
    
    private func _convertButtonAction() {
        var pages: [Int] = []
        let filePath = getConvertFileSavePath()
        if (FileManager.default.fileExists(atPath: filePath)) {
            try?FileManager.default.removeItem(atPath: filePath)
        }

        let document = pdfPreView?.pdfPreView.pdfView.document
        if ((document?.writeDecrypt(to: URL(fileURLWithPath: filePath)))!) {
            for i in 0 ..< document!.pageCount {
                pages.append(Int(i)+1)
            }
        }

        
        if (pages.count <= 0) {
            let alert = NSAlert()
            alert.alertStyle = .warning
            alert.messageText = KMLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
            alert.runModal()
            return
        }
        
        DispatchQueue.main.async {
            NSPanel.savePanel(self.window!) { panel in
                var url: URL = (self.pdfPreView?.pdfPreView.pdfView.document.documentURL)!
                if (self.oriDocumentUrl != nil) {
                    url = self.oriDocumentUrl!
                }
                let name = url.deletingPathExtension().lastPathComponent
                panel.nameFieldStringValue = name
                panel.allowedFileTypes = [self.fileExtension]
            } completion: { response, url in
                if (response == .cancel) {
                    return
                }
                let outputFolderPath = url!.deletingLastPathComponent().path
                let convert = self.initConvert()
                self.convert = convert
                convert.password = self.documentModel!.password
                convert.outputFolderPath = outputFolderPath
                convert.filePath = filePath
                convert.pages = pages
                var fileName = url!.deletingPathExtension().lastPathComponent
                if (self.fileExtension.isEmpty) {
                    fileName = url!.lastPathComponent
                }

                convert.outputFileName = fileName
                self.convertModelAppendParams(convert: convert)
                
                DispatchQueue.main.async {
                    self.showProgressWindow()
                    self.progressController?.maxValue = Double(convert.pages.count)
                }

                DispatchQueue.global().async {
                    KMPDFConvertManager.defaultManager.convert(convert: convert, progress: { index in
                        DispatchQueue.main.async {
                            self.progressController?.increment(by: 1.0)
                        }
                    }) { [unowned self] finished, error in
                        self.hiddenProgressWindow()
                        
                        // 清除临时文件
                        if (FileManager.default.fileExists(atPath: filePath)) {
                            try?FileManager.default.removeItem(atPath: filePath)
                        }
                        if finished {
                            self._clearData()
                            cancelButtonAction()
                            if FileManager.default.fileExists(atPath: convert.outputFilePath) {
                                NSWorkspace.shared.activateFileViewerSelecting([URL(fileURLWithPath: convert.outputFilePath)])
                            }
                        } else {
                            var errorString = ""
                            let myError: NSError? = error as? NSError
                            if myError?.code == 1 {
                                errorString = KMLocalizedString("Password required or incorrect password. Please re-enter your password and try again", comment: "")
                            } else if myError?.code == 2 {
                                errorString = KMLocalizedString("The license doesn't allow the permission", comment: "")
                            } else if myError?.code == 3 {
                                errorString = KMLocalizedString("Malloc failure", comment: "")
                            } else if myError?.code == 4 {
                                errorString = KMLocalizedString("Unknown error in processing conversion. Please try again later", comment: "")
                            } else if myError?.code == 5 {
                                errorString = KMLocalizedString("Unknown error in processing PDF. Please try again later", comment: "")
                            } else if myError?.code == 6 {
                                errorString = KMLocalizedString("File not found or could not be opened. Check if your file exists or choose another file to convert", comment: "")
                            } else if myError?.code == 7 {
                                errorString = KMLocalizedString("File not in PDF format or corruptead. Change a PDF file and try again", comment: "")
                            } else if myError?.code == 8 {
                                errorString = KMLocalizedString("Unsupported security scheme", comment: "")
                            } else if myError?.code == 9 {
                                errorString = KMLocalizedString("Page not found or content error", comment: "")
                            } else {
                                errorString = KMLocalizedString("Table not found", comment: "")
                            }
                            
                            let alert = NSAlert()
                            alert.alertStyle = .critical
                            alert.messageText = KMLocalizedString("Conversion Failed", comment: "")
                            alert.informativeText = errorString
                            alert.addButton(withTitle: KMLocalizedString("OK", comment: ""))
                            alert.runModal()
                        }
                    }
                }
            }
        }
    }
    
    private func _getOCRLanguage(idx: Int) -> COCRLanguage {
        switch (idx) {
            case 0: //chinese
                self.ocrLanguage_ = .chinese
                break
            case 1: //chinese zht
                self.ocrLanguage_ = .chineseTraditional
                break
            case 2: //English
                self.ocrLanguage_ = .english
                break
            case 3:
                //Japanese
                self.ocrLanguage_ = .japanese
                break
            case 4:
                //Kroean
                self.ocrLanguage_ = .korean
                break
            case 5:
                //Serbian
                self.ocrLanguage_ = .serbian
                break
            case 6:
                //Occitan
                self.ocrLanguage_ = .occitan
                break
            case 7:
                //Danish
                self.ocrLanguage_ = .danish
                break
            case 8:
                //German
                self.ocrLanguage_ = .german
                break
            case 9:
                //French
                self.ocrLanguage_ = .french
                break
            case 10:
                //Italian
                self.ocrLanguage_ = .italian
                break
            case 11:
                //Spanish
                self.ocrLanguage_ = .spanish
                break
            case 12:
                //Portuguese
                self.ocrLanguage_ = .portuguese
                break
            case 13:
                //Maori
                self.ocrLanguage_ = .maori
                break
            case 14:
                //Malay
                self.ocrLanguage_ = .malay
                break
            case 15:
                //Malay
                self.ocrLanguage_ = .maltese
                break
            case 16:
                //Dutch
                self.ocrLanguage_ = .dutch
                break
            case 17:
                //Norwegian
                self.ocrLanguage_ = .norwegian
                break
            case 18:
                //Polish
                self.ocrLanguage_ = .polish
                break
            case 19:
                //Romanian
                self.ocrLanguage_ = .romanian
                break
            case 20:
                //Slovak
                self.ocrLanguage_ = .slovak
                break
            case 21:
                //Slovenian
                self.ocrLanguage_ = .slovenian
                break
            case 22:
                //Albanian
                self.ocrLanguage_ = .albanian
                break
            case 23:
                //Swedish
                self.ocrLanguage_ = .swedish
                break
            case 24:
                //Swahili
                self.ocrLanguage_ = .swahili
                break
            case 25:
                //Tagalog
                self.ocrLanguage_ = .tagalog
                break
            case 26:
                //Turish
                self.ocrLanguage_ = .turish
                break
            case 27:
                //Uzbek
                self.ocrLanguage_ = .uzbek
                break
            case 28:
                //Vietnamese
                self.ocrLanguage_ = .vietnamese
                break
            case 29:
                //Afrikaans
                self.ocrLanguage_ = .afrikaans
                break
            case 30:
                //Azerbaijani
                self.ocrLanguage_ = .azerbaijani
                break
            case 31:
                //Bosnian
                self.ocrLanguage_ = .bosnian
                break
            case 32:
                //Czech
                self.ocrLanguage_ = .czech
                break
            case 33: //Welsh
                self.ocrLanguage_ = .welsh
                break
            case 34: //Estonian
                self.ocrLanguage_ = .estonian
                break
             case 35: //Irish
                self.ocrLanguage_ = .irish
                break
             case 36: //Croatian
                self.ocrLanguage_ = .croatian
                break
            case 37: //Hungarian
                self.ocrLanguage_ = .hungarian
                break
            case 38: //Indonesian
                self.ocrLanguage_ = .indonesian
                break
            case 39: //Icelandic
                self.ocrLanguage_ = .icelandic
                break
            case 40: //Kurdish
                self.ocrLanguage_ = .kurdish
                break
            case 41: //Lithuanian
                self.ocrLanguage_ = .lithuanian
                break
            case 42: //Latvian
                self.ocrLanguage_ = .latvian
                break
            case 43: //Marathi
                self.ocrLanguage_ = .marathi
                break
            case 44: //Nepali
                self.ocrLanguage_ = .nepali
                break
            case 45: //Latvia
                self.ocrLanguage_ = .latvian
                break
            case 46: //Bihari
                self.ocrLanguage_ = .bihari
                break
            case 47: //Maithili
                self.ocrLanguage_ = .maithili
                break
            case 48: //Angika
                self.ocrLanguage_ = .angika
                break
            case 49: //Bhojpuri
                self.ocrLanguage_ = .bhojpuri
                break
            case 50: //Magahi
                self.ocrLanguage_ = .magahi
                break
            case 51: //Nagpur
                self.ocrLanguage_ = .nagpur
                break
            case 52: //Newari
                self.ocrLanguage_ = .newari
                break
            case 53: //GoanKonkani
                self.ocrLanguage_ = .goanKonkani
                break
            case 54: //SaudiArabia
                self.ocrLanguage_ = .saudiArabia
                break
            default:
                self.ocrLanguage_ = .english
                break
        }
        return self.ocrLanguage_
    }
    
    // MARK: - Notifation Methods
    
    // MARK: Progress
    func showProgressWindow() {
        self.hiddenProgressWindow()
        
        let progress = SKProgressController()
        progress.window?.backgroundColor = NSColor.km_init(hex: "#36383B")
        progress.window?.contentView?.wantsLayer = true
        progress.window?.contentView?.layer?.backgroundColor = NSColor.km_init(hex: "#36383B").cgColor
        progress.progressField.textColor = NSColor.white
        progress.message = KMLocalizedString("Converting...", comment: "")

        progress.closeBlock = { [weak self] in
            if let convert = self?.convert {
                KMPDFConvertManager.defaultManager.cancel(convert: convert)
            }
        }
        
        self.progressController = progress
        self.window?.beginSheet(progress.window!)
    }
    
    func hiddenProgressWindow() {
        if (self.progressController != nil) {
            self.window?.endSheet((self.progressController?.window)!)
            self.progressController = nil
        }
    }
    
    func getCurrentLanguage() -> String {
        let array: [String] = UserDefaults.standard.object(forKey: "AppleLanguages") as! [String]
        return array.first!
    }
    
    /// 存储用户的选择的语言
    func saveLanugageSelectedIndex(index: Int) {
        UserDefaults.standard.setValue("\(index)", forKey: kKMConvertLanugageSelectedIndex)
        UserDefaults.standard.synchronize()
    }
    
    private func _clearData() {
        if let _ = self.oriDocumentUrl {
            if let data = self.pdfPreView?.pdfView?.document.documentURL.path, FileManager.default.fileExists(atPath: data) {
                try?FileManager.default.removeItem(atPath: data)
            }
        }
    }
}