PDF_Office/PDF Office/PDF Master/Class/PDFWindowController/Side/RightSide/AnnotationProperty/KMAnnotationSelectLinkViewController.swift

//
//  KMAnnotationSelectLinkViewController.swift
//  PDF Reader Pro
//
//  Created by wanjun on 2023/11/23.
//

import Cocoa

let URLPlaceholder = "https://www.pdfreaderpro.com"
let EmailPlaceholder = "support@pdfreaderpro.com"

enum KMAnnotationLinkType: UInt {
    case page = 0
    case url
    case email
}

@objcMembers class KMAnnotationSelectLinkViewController: NSViewController, NSTextFieldDelegate {
    
    var _annotations: [CPDFAnnotation]?
    var pdfDocument: CPDFDocument?
    weak var _pdfview: CPDFListView?
    
    @IBOutlet var linkPageBox: KMBox!
    @IBOutlet var linkPageImageView: NSImageView!
    @IBOutlet var linkPageLabel: NSTextField!

    @IBOutlet var linkUrlBox: KMBox!
    @IBOutlet var linkUrlImageView: NSImageView!
    @IBOutlet var linkUrlLabel: NSTextField!

    @IBOutlet var linkEmailBox: KMBox!
    @IBOutlet var linkEmailImageView: NSImageView!
    @IBOutlet var linkEmailLabel: NSTextField!

    @IBOutlet var contentBox: NSBox!
    @IBOutlet var contentBoxLayoutConstraint: NSLayoutConstraint!

    @IBOutlet var pageView: NSView!
    @IBOutlet var pageLabel: NSTextField!
    @IBOutlet var inputPageTextField: NSTextField!
    @IBOutlet var allPageLabel: NSTextField!

    @IBOutlet var urlView: NSView!
    @IBOutlet var urlLabel: NSTextField!
    @IBOutlet var inputUrlTextField: NSTextField!

    @IBOutlet var goButton: NSButton!
    @IBOutlet var errorLabel: NSTextField!

    var annotation: CPDFLinkAnnotation?

    var _linkType: KMAnnotationLinkType = .page

    var mouseDownBox: KMBox?

    var pageRecord: String?
    var urlRecord: String?
    var emailRecord: String?
    var startPage: String?
    var isGo: Bool = false
    
    // MARK: Init Methods
    
    deinit {
        NotificationCenter.default.removeObserver(self)
        inputUrlTextField.delegate = nil
        inputPageTextField.delegate = nil
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do view setup here.
        
        pageRecord = ""
        urlRecord = ""
        emailRecord = ""

        linkPageLabel.stringValue = NSLocalizedString("Go To Page", comment: "")
        linkPageLabel.toolTip = NSLocalizedString("Go To Page", comment: "")
        linkPageLabel.textColor = KMAppearance.Layout.h1Color()
        linkUrlLabel.stringValue = NSLocalizedString("Hyperlink", comment: "")
        linkUrlLabel.toolTip = NSLocalizedString("Hyperlink", comment: "")
        linkUrlLabel.textColor = KMAppearance.Layout.h1Color()
        linkEmailLabel.stringValue = NSLocalizedString("Email", comment: "")
        linkEmailLabel.toolTip = NSLocalizedString("Email", comment: "")
        linkEmailLabel.textColor = KMAppearance.Layout.h1Color()

        errorLabel.stringValue = NSLocalizedString("Page number out of range", comment: "")
        errorLabel.textColor = KMAppearance.Status.errColor()

        let boxArr: [KMBox] = [linkPageBox, linkUrlBox, linkEmailBox]
        for box in boxArr {
            box.moveCallback = { [weak self] mouseEntered, mouseBox in
                guard let self = self else { return }
                if mouseEntered {
                    if self.mouseDownBox != mouseBox {
                        if box == self.linkPageBox {
                            self.linkPageBox.fillColor = KMAppearance.Status.selColor()
                            self.linkPageImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkPageSel")
                            self.linkPageLabel.textColor = KMAppearance.Layout.h0Color()
                        } else if box == self.linkUrlBox {
                            self.linkUrlBox.fillColor = KMAppearance.Status.selColor()
                            self.linkUrlImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkUrlSel")
                            self.linkUrlLabel.textColor = KMAppearance.Layout.h0Color()
                        } else if box == self.linkEmailBox {
                            self.linkEmailBox.fillColor = KMAppearance.Status.selColor()
                            self.linkEmailImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkEmailSel")
                            self.linkEmailLabel.textColor = KMAppearance.Layout.h0Color()
                        }
                    }
                } else {
                    if self.mouseDownBox != mouseBox {
                        box.fillColor = NSColor.clear
                        if box == self.linkPageBox {
                            self.linkPageImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkPage")
                            self.linkPageLabel.textColor = KMAppearance.Layout.h1Color()
                        } else if box == self.linkUrlBox {
                            self.linkUrlImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkUrl")
                            self.linkUrlLabel.textColor = KMAppearance.Layout.h1Color()
                        } else if box == self.linkEmailBox {
                            self.linkEmailImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkEmail")
                            self.linkEmailLabel.textColor = KMAppearance.Layout.h1Color()
                        }
                    }
                }
            }
            
            box.downCallback = { [weak self] downEntered, mouseBox, event in
                guard let self = self else { return }
                if downEntered {
                    if !IAPProductsManager.default().isAvailableAllFunction() {
                        if mouseBox == self.linkUrlBox || mouseBox == self.linkEmailBox {
                            KMPurchaseCompareWindowController.sharedInstance().showWindow(nil)
                            return
                        }
                    }
                    
                    if self.mouseDownBox == mouseBox {
                        return
                    }
                    
                    var mouseDownInt = 0
                    if mouseBox == self.linkPageBox {
                        self.inputPageTextField.stringValue = ""
                        self.linkType = .page
                        mouseDownInt = 0
                    } else if mouseBox == self.linkUrlBox {
                        self.inputUrlTextField.stringValue = ""
                        self.linkType = .url
                        mouseDownInt = 1
                    } else if mouseBox == self.linkEmailBox {
                        self.inputUrlTextField.stringValue = ""
                        self.linkType = .email
                        mouseDownInt = 2
                    }
                    
                    UserDefaults.standard.set(mouseDownInt, forKey: "kmLinkSelectIndex")
                    UserDefaults.standard.synchronize()
                    
                    self.mouseDownBox = mouseBox
                }
            }
        }

        isGo = true
        pageLabel.stringValue = NSLocalizedString("Page Number:", comment: "")
        pageLabel.textColor = KMAppearance.Layout.h1Color()
        allPageLabel.textColor = KMAppearance.Layout.h2Color()

        goButton.title = NSLocalizedString("Go", tableName: "MainMenu", comment: "")
        goButton.setTitleColor(KMAppearance.Layout.w0Color())
        goButton.wantsLayer = true
        goButton.layer?.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
        goButton.setTitleColor(KMAppearance.Layout.w0Color())

        inputPageTextField.backgroundColor = KMAppearance.Layout.l1Color()
        inputUrlTextField.backgroundColor = KMAppearance.Layout.l1Color()
        inputPageTextField.wantsLayer = true
        inputUrlTextField.wantsLayer = true
        inputPageTextField.layer?.borderWidth = 1.0
        inputUrlTextField.layer?.borderWidth = 1.0
        inputPageTextField.layer?.borderColor = KMAppearance.Interactive.a0Color().cgColor
        inputUrlTextField.layer?.borderColor = KMAppearance.Interactive.a0Color().cgColor
        inputPageTextField.layer?.cornerRadius = 1.0
        inputUrlTextField.layer?.cornerRadius = 1.0

        inputUrlTextField.inputContext?.allowedInputSourceLocales = [NSAllRomanInputSourcesLocaleIdentifier]

        if annotation?.url() != nil {
            if let scheme = annotation?.url().fileURL.scheme {
                if scheme == "mailto" {
                    linkType = .email
                    mouseDownBox = linkEmailBox
                } else {
                    linkType = .url
                    mouseDownBox = linkUrlBox
                }
            }
        } else {
            linkType = .page
            mouseDownBox = linkPageBox
        }

    }
    
    override func viewDidAppear() {
        super.viewDidAppear()
        
        inputPageTextField.delegate = self
        inputUrlTextField.delegate = self

        if let url = annotation?.url {
            inputUrlTextField.becomeFirstResponder()
        } else {
            inputPageTextField.becomeFirstResponder()
        }
    }
    
    // MARK: Get & Set
    
    var linkType: KMAnnotationLinkType {
        set {
            _linkType = newValue
            contentBoxLayoutConstraint.constant = 46.0
            switch _linkType {
            case .page:
                contentBoxLayoutConstraint.constant = 24.0
                createLinkPageView()
                contentBox.contentView = pageView
                inputPageTextField.becomeFirstResponder()
            case .url:
                createLinkURLView()
                contentBox.contentView = urlView
                inputUrlTextField.becomeFirstResponder()
            case .email:
                createLinkEmailView()
                contentBox.contentView = urlView
                inputUrlTextField.becomeFirstResponder()
            default:
                break
            }
        }
        get {
            return _linkType
        }
    }
    
    weak var pdfview: CPDFListView? {
        set {
            _pdfview = newValue
//            startPage = _pdfview?.currentPage().label
            self.startPage = "\((self._pdfview?.currentPage().pageIndex() ?? 1)+1)"
        }
        get {
            return _pdfview
        }
    }
    
    var annotations: [CPDFAnnotation]? {
        set {
            _annotations = newValue
            
            annotation = _annotations?.first as? CPDFLinkAnnotation
        }
        get {
            return _annotations
        }
    }

    // MARK: Private
    
    func getURLViewHeightLayoutConstraint() -> CGFloat {
        return urlLabel.frame.height + 4 + inputUrlTextField.frame.height
    }

    func getPageViewHeightLayoutConstraint() -> CGFloat {
        return inputPageTextField.frame.height
    }

    func createLinkPageView() {
        annotationLinkSelectBox(linkPageBox)
        
        inputPageTextField.formatter = TextFieldFormatter()
        
        if pdfDocument!.pageCount > 1 {
            inputPageTextField.placeholderString = "1-\(pdfDocument!.pageCount)"
        } else {
            inputPageTextField.placeholderString = "1"
        }
        
        allPageLabel.stringValue = "/\(pdfDocument!.pageCount)"
        
        if let destination = annotation?.destination() {
            if let page = destination.page() {
                let pageIndex = page.document?.index(for: page) ?? 0
                inputPageTextField.stringValue = "\(pageIndex + 1)"
                pageRecord = "\(pageIndex + 1)"
            }
        }
        
        if inputPageTextField.stringValue.isEmpty {
            inputPageTextField.stringValue = pageRecord!
        }
        
        let pageFloat = Float(inputPageTextField.stringValue) ?? 0
        if pageFloat < 1 || UInt(pageFloat) > self.pdfDocument!.pageCount {
            goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
        } else {
            goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color())
        }
    }

    func createLinkURLView() {
        annotationLinkSelectBox(linkUrlBox)
        urlLabel.stringValue = NSLocalizedString("URL:", comment: "")
        urlLabel.textColor = KMAppearance.Layout.h1Color()

        inputUrlTextField.placeholderString = "https://www.pdfreaderpro.com"
        
        if let annotationURL = annotation?.url() {
            var urlString = annotationURL.fileURL.absoluteString
            if urlString.hasPrefix("http://") {
                urlString = String(urlString.suffix(from: urlString.index(urlString.startIndex, offsetBy: 7)))
            } else if urlString.hasPrefix("https://") {
                urlString = String(urlString.suffix(from: urlString.index(urlString.startIndex, offsetBy: 8)))
            }
            inputUrlTextField.stringValue = urlString 
            urlRecord = urlString 
        }
        
        if inputUrlTextField.stringValue.isEmpty {
            inputUrlTextField.stringValue = urlRecord!
        }
        
        if urlRecord!.isEmpty {
            goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color())
        } else {
            goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
        }
    }
    
    func createLinkEmailView() {
        annotationLinkSelectBox(linkEmailBox)
        urlLabel.stringValue = NSLocalizedString("Email:", comment: "")
        urlLabel.textColor = KMAppearance.Layout.h1Color()
        inputUrlTextField.placeholderString = "support@pdfreaderpro.com"
        
        let urlString = annotation?.url() ?? ""
        if urlString.fileURL.scheme == "mailto" {
            if let urlString = annotation?.url().fileURL.absoluteString, urlString.hasPrefix("mailto:") {
                let trimmedString = String(urlString.suffix(from: urlString.index(urlString.startIndex, offsetBy: 7)))
                inputUrlTextField.stringValue = trimmedString
                emailRecord = trimmedString
            }
            
            if inputUrlTextField.stringValue.count > 0 {
                inputUrlTextField.stringValue = emailRecord!
            }
        }
        
        if emailRecord!.count > 0 {
            goButton.layer?.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color())
        } else {
            goButton.layer?.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
            goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
        }
    }
    
    func isValidateEmail(_ email: String) -> Bool {
        let emailRegex = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}"
        let emailTest = NSPredicate(format: "SELF MATCHES %@", emailRegex)
        return emailTest.evaluate(with: email)
    }

    func judgeWebURL(_ urlString: String) -> String {
        var modifiedURLString = urlString
        if !modifiedURLString.hasPrefix("http://") && !modifiedURLString.hasPrefix("https://") {
            modifiedURLString = "https://" + modifiedURLString
        }
        if modifiedURLString == "https://" {
            modifiedURLString = ""
        }
        return modifiedURLString
    }

    func judgeEmailURL(_ urlString: String) -> String {
        var modifiedURLString = urlString
        if !modifiedURLString.hasPrefix("mailto:") {
            modifiedURLString = "mailto:" + modifiedURLString
        }
        if modifiedURLString == "mailto:" {
            modifiedURLString = ""
        }
        return modifiedURLString
    }

    func annotationLinkSelectBox(_ box: KMBox) {
        if box.isEqual(linkPageBox) {
            linkPageBox.fillColor = KMAppearance.Status.selColor()
            linkUrlBox.fillColor = NSColor.clear
            linkEmailBox.fillColor = NSColor.clear
            
            linkPageImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkPageSel")
            linkUrlImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkUrl")
            linkEmailImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkEmail")
            
            linkPageLabel.textColor = KMAppearance.Layout.h0Color()
            linkUrlLabel.textColor = KMAppearance.Layout.h1Color()
            linkEmailLabel.textColor = KMAppearance.Layout.h1Color()
            
            if let dexPage = Int(pageRecord!), pageRecord!.count >= 1 {
                if dexPage < 1 || dexPage > self.pdfDocument!.pageCount {
                    errorLabel.isHidden = false
                } else {
                    errorLabel.isHidden = true
                }
            }
        } else if box.isEqual(linkUrlBox) {
            linkUrlBox.fillColor = KMAppearance.Status.selColor()
            linkPageBox.fillColor = NSColor.clear
            linkEmailBox.fillColor = NSColor.clear
            
            linkPageImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkPage")
            linkUrlImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkUrlSel")
            linkEmailImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkEmail")
            
            linkUrlLabel.textColor = KMAppearance.Layout.h0Color()
            linkPageLabel.textColor = KMAppearance.Layout.h1Color()
            linkEmailLabel.textColor = KMAppearance.Layout.h1Color()
            
            errorLabel.isHidden = true
        } else if box.isEqual(linkEmailBox) {
            linkEmailBox.fillColor = KMAppearance.Status.selColor()
            linkPageBox.fillColor = NSColor.clear
            linkUrlBox.fillColor = NSColor.clear
            
            linkPageImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkPage")
            linkUrlImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkUrl")
            linkEmailImageView.image = NSImage(named: "KMImageNameUXIconPropertybarLinkEmailSel")
            
            linkEmailLabel.textColor = KMAppearance.Layout.h0Color()
            linkPageLabel.textColor = KMAppearance.Layout.h1Color()
            linkUrlLabel.textColor = KMAppearance.Layout.h1Color()
            
            errorLabel.isHidden = true
        }
    }
    
    // MARK: Public Method
    
    // MARK: Action
    
    @IBAction func goButtonAction(_ sender: Any) {
        if linkType == .page {
            let pageFloat = Float(inputPageTextField.stringValue)
            if pageFloat! < 1 || UInt(pageFloat!) > self.pdfDocument!.pageCount {
                return
            }
        } else if linkType == .url {
            if urlRecord!.count <= 0 {
                return
            }
        } else if linkType == .email {
            if emailRecord!.count <= 0 {
                return
            }
        }

        goButton.layer?.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
        Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(timered(_:)), userInfo: nil, repeats: false)

        switch linkType {
        case .page:
            guard let activeAnnotation = pdfview?.activeAnnotation as? CPDFLinkAnnotation else { return }
            activeAnnotation.setURL(nil)

            let dexPage: Int
            if isGo {
                isGo = false
                dexPage = Int(inputPageTextField.stringValue) ?? 0
                goButton.title = NSLocalizedString("Go Back", comment: "Tool tip message")
            } else {
                isGo = true
                dexPage = Int(startPage!) ?? 0
                goButton.title = NSLocalizedString("Go", tableName: "MainMenu", comment: "")
            }

            goButton.setTitleColor(KMAppearance.Layout.w0Color())
            guard dexPage >= 1 && dexPage <= pdfDocument!.pageCount else {
                let alert = NSAlert()
                alert.alertStyle = .critical
                alert.messageText = NSLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
                alert.runModal()
                return
            }

            let goPage = Int(inputPageTextField.stringValue) ?? 0
            if let page = pdfDocument!.page(at: UInt(goPage - 1)) {
                let bounds = page.bounds(for: .cropBox)
                let destination = CPDFDestination(page: page, at: NSPoint(x: 0, y: bounds.size.height))
                (pdfview?.activeAnnotation as! CPDFLinkAnnotation as CPDFLinkAnnotation).setDestination(destination)
                pdfview!.needsDisplay = true
            }

            if let page = pdfDocument!.page(at: UInt(dexPage - 1)) {
                let bounds = page.bounds(for: .cropBox)
                let dest = CPDFDestination(page: page, at: NSPoint(x: 0, y: bounds.size.height))
                pdfview!.go(to: dest)
            }

        case .url:
            guard let activeAnnotation = pdfview?.activeAnnotation as? CPDFLinkAnnotation else { return }
            activeAnnotation.setDestination(nil)

            let linkUrlPath = judgeWebURL(inputUrlTextField.stringValue)
            activeAnnotation.setURL(linkUrlPath)
            pdfview!.needsDisplay = true

            if let url = (pdfview?.activeAnnotation as! CPDFLinkAnnotation).url() {
                NSWorkspace.shared.open(URL(string: url)!)
            }

        case .email:
            guard let activeAnnotation = pdfview?.activeAnnotation as? CPDFLinkAnnotation else { return }
            activeAnnotation.setDestination(nil)

            if !isValidateEmail(inputUrlTextField.stringValue) {
                let alert = NSAlert()
                alert.alertStyle = .critical
                alert.messageText = NSLocalizedString("Invalid Email. Please try again.", comment: "")
                alert.runModal()
                return
            }

            let linkUrlPath = judgeEmailURL(inputUrlTextField.stringValue)
            activeAnnotation.setURL(linkUrlPath)
            pdfview!.needsDisplay = true

            if let url = (pdfview?.activeAnnotation as! CPDFLinkAnnotation).url() {
                NSWorkspace.shared.open(URL(string: url)!)
            }

        default:
            break
        }
    }

    @objc func timered(_ timer: Timer) {
        goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
        goButton.setTitleColor(KMAppearance.Layout.w0Color())
    }
    
    // MARK: NSTextFieldDelegate Methods
    
    @objc func controlTextDidChange(_ notification: Notification) {
        guard let textField = notification.object as? NSTextField else { return }

        if mouseDownBox!.isEqual(linkPageBox) {
            pageRecord = textField.stringValue
        } else if mouseDownBox!.isEqual(linkUrlBox) {
            urlRecord = textField.stringValue
        } else if mouseDownBox!.isEqual(linkEmailBox) {
            emailRecord = textField.stringValue
        }

        if linkType == KMAnnotationLinkType.page {
            (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setURL(nil)
            let dexPage = Int(inputPageTextField.stringValue) ?? 0
            if (dexPage < 1 || dexPage > pdfDocument!.pageCount) && pageRecord!.count > 0 {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
                errorLabel.isHidden = false
                return
            } else if pageRecord!.count > 0 {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color())
                errorLabel.isHidden = true
            } else {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
            }

            let pageIndex = UInt(max(dexPage-1, 0))
            let page = pdfDocument!.page(at: pageIndex)
            let bounds = page?.bounds(for: .cropBox) ?? .zero
            let destination = CPDFDestination(page: page, at: NSMakePoint(0, bounds.size.height))
            
            (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setDestination(destination)
            pdfview?.setNeedsDisplay(pdfview!.visibleRect)
        } else if linkType == KMAnnotationLinkType.url {
            (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setDestination(nil)
            let linkUrlPath: String = judgeWebURL(urlRecord!)
            if linkUrlPath == "" {
                (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setURL(nil)
            } else {
                (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setURL(linkUrlPath)
            }
            
            if urlRecord!.count > 0 {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color())
            } else {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
            }
            pdfview!.setNeedsDisplay(pdfview!.visibleRect)
        } else if linkType == KMAnnotationLinkType.email {
            (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setDestination(nil)
            let linkUrlPath: String = judgeEmailURL(emailRecord!)
            if linkUrlPath == "" {
                (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setURL(nil)
            } else {
                (pdfview?.activeAnnotation as? CPDFLinkAnnotation)?.setURL(linkUrlPath)
            }
            
            if emailRecord!.count > 0 {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color())
            } else {
                goButton.layer!.backgroundColor = KMAppearance.Interactive.m0Color().withAlphaComponent(0.4).cgColor
                goButton.setTitleColor(KMAppearance.Layout.w0Color().withAlphaComponent(0.4))
            }
            pdfview?.setNeedsDisplay(pdfview!.visibleRect)
        }
    }

}