//
//  KMPDFEditViewController.swift
//  PDF Master
//
//  Created by tangchao on 2023/1/6.
//


typealias KMPDFEditViewControllerSelectionDidChange = (_ selectedIndexs: Set<IndexPath>) -> ()

class KMPDFEditViewController: KMPDFThumbViewBaseController {
    @IBOutlet weak var topBarBox: NSBox!
    @IBOutlet weak var contentBox: NSBox!
    
    @IBOutlet weak var thumbnailSizeView: NSView!
    @IBOutlet weak var lineBoxView: NSView!
    
    
    var toolBar = KMPDFEditToolbar(frame: NSZeroRect)
    override var thumbnailView: KMPDFThumbnailView {
        get {
            if (super.thumbnailView is KMPageEditThumbnailView) {
                return super.thumbnailView
            }
            
            super.thumbnailView = KMPageEditThumbnailView()
            return super.thumbnailView
        }
        set {
            super.thumbnailView = newValue
        }
    }
    
    var pageEditThumbnailView: KMPageEditThumbnailView {
        get {
            return self.thumbnailView as! KMPageEditThumbnailView
        }
    }
    
    override var menuItems: [[KMPDFThumbViewMenu.Item]] {
        get {
            return [[.insert ,.extract], [.leftRotate, .rightRotate, .copy, .paste, .reverse],
                    [.delete], [.share]]
        }
    }
    
    private var pdfDocument: CPDFDocument?
    var listView: CPDFView?
    
    var pageIsUpdate: Bool = true
    var selectedPages: [Int] = []
    
    private let defaultItemSize = NSMakeSize(215, 250)
    var itemSize: NSSize = NSMakeSize(215, 250)
    
    // index=1 双击退出;index=2 打印
    var itemClick: KMCommonClickBlock?
    var documentEditedCallback: KMCommonBlock?
    var selectionDidChange: KMPDFEditViewControllerSelectionDidChange?
    
    internal var viewFirstAppear = true
    private var _listViewCurrentIndex: Int = 0
    var listViewCurrentIndex: Int {
        get {
            return self._listViewCurrentIndex
        }
    }
    
    override var canPayFunction: Bool {
        didSet {
            self.thumbnailView.limit = !self.canPayFunction
        }
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    init(_ document: CPDFDocument) {
        super.init(nibName: "KMPDFEditViewController", bundle: nil)
        
        self.pdfDocument = document
        self.kmUndoManager = UndoManager()
    }
    
    override func viewDidAppear() {
        super.viewDidAppear()
        
        if (self.pdfDocument?.isLocked == false && self.viewFirstAppear) {
            self.viewFirstAppear = false
            self.thumbnailView.document = self.pdfDocument!
            self.thumbnailView.reloadData()
        }
        
        if let view = self.listView { // 存储阅读视图的当前页面索引
            self._listViewCurrentIndex = view.currentPageIndex
        }
        if (self.selectedPages.isEmpty) {
            var index: Int = 0
            if (self.listView != nil) {
                index = self.listView!.currentPageIndex
            }
            
            self.selectPages(indexs: IndexSet(integer: index))
            self.toolBar.setPageRangeString("\(index+1)")
        } else {
            var indexs: IndexSet = []
            for pageIndex in self.selectedPages {
                if (pageIndex < 0 || pageIndex >= (self.listView?.document.pageCount)!) {
                    continue
                }
                
                indexs.insert(pageIndex)
            }
            
            self.selectPages(indexs: indexs)
            self.toolBar.setPageRangeString(KMPageRangeTools.newParseSelectedIndexs(selectedIndex: indexs.sorted()))
        }
        
        self.view.window?.makeFirstResponder(self)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 显示拖放移动动效
//        self.thumbnailView.dragMoveEffectAnimated = true
//        self.thumbnailView.collectionView.backgroundColor(NSColor.km_init(hex: "#CED0D4"))
        self.thumbnailView.collectionView.wantsLayer = true
        self.thumbnailView.collectionView.layer?.backgroundColor = KMAppearance.PDFViewBackgroundColor().cgColor
        
        self.thumbnailSizeView.wantsLayer = true
        self.thumbnailSizeView.layer?.backgroundColor = KMAppearance.Layout.b80Color().cgColor
        self.lineBoxView.wantsLayer = true
        self.lineBoxView.layer?.backgroundColor = KMAppearance.Layout.h2Color().cgColor
        
        
        var allowedFileTypes: [String] = []
//        if let _types = KMConvertPDFManager.supportFileType()  {
        allowedFileTypes = KMTools.pdfExtensions + KMConvertPDFManager.supportFileType()
//        } else {
//            allowedFileTypes = KMTools.pdfExtensions + KMTools.imageExtensions
//        }
        self.thumbnailView.kmAllowedFileTypes = allowedFileTypes
        
        let toolBar = self.toolBar
        self.topBarBox.contentView = toolBar
        self.topBarBox.fillColor = NSColor.km_init(hex: "#F7F8FA")
        toolBar.itemClick = { [unowned self] item, index in
            guard let type = KMPageEditType(rawValue: index) else {
                if (index == KMPageEditType.insert_files) {
                    self.insertFileAction()
                } else if (index == KMPageEditType.insert_blank_page) {
                    self.insertBlankPageAction()
                } else if (index == KMPageEditType.insert_custom_page) {
                    self.item_insertCustomPage(sender: nil)
                } else if (index == KMPageEditType.extract_selected_pages) {
                    self.extractSelectPageItemAction()
                } else if (index == KMPageEditType.split_selected_pages) {
                    self.splitMenuAction()
                }
                return
            }
            
            if (type == .leftRotate) {
                self.leftRotateAction()
            } else if (type == .rightRotate) {
                self.rightRotateAction()
            } else if (type == .zoomOut) {
                self.zoomOutButtonAction(sender: item?.zoomOutButton)
            } else if (type == .zoomIn) {
                self.zoomInButtonAction(sender: item?.zoomInButton)
            } else if (type == .extract) {
                self.extractAction()
            } else if (type == .replace) {
                self.replaceAction()
            } else if (type == .split) {
                self.splitAction()
            } else if (type == .reverse) {
                self.reverseAction()
            } else if (type == .delete) {
                self.deleteAction()
            } else if (type == .pageRange) {
//                self.km_comboBoxSelectionDidChange((item?.pageRangeView)!)
            } else if (type == .insert) {
                self.trackEvent(type: .insert)
            } else if (type == .copy) {
                self.copyAction()
            } else if (type == .paste) {
                self.pasteAction()
            }
        }
        toolBar.pageRangeitemClick = { [unowned self] type in
            self.km_comboBoxSelectionDidChange(type)
        }
        toolBar.pageRangeValueDidChange = { [unowned self] value, _ in
            self.km_controlTextDidEndEditing(self.toolBar.pageRangeView!)
        }
        
        let view = self.thumbnailView
        self.contentBox.contentView?.addSubview(view)
        view.frame = self.contentBox.contentView!.bounds
        view.autoresizingMask = [.width, .height]
        self.pageEditThumbnailView.delegate = self
        self.pageEditThumbnailView.selectionDidChange = { [weak self] selectedIndexs in
            guard let self = self else {
                return
            }
            self.selectionDidChange?(selectedIndexs)
            self.view.window?.makeFirstResponder(self)
            
            let enabled = (selectedIndexs.count > 0)
            for i in 0 ..< self.toolBar.toolBar.items.count {
                let item = self.toolBar.toolBar.items[i]
                if (item.itemIdentifier == KMToolbarPageEditExtractItemIdentifier ||
                    item.itemIdentifier == KMToolbarPageEditLeftRotateItemIdentifier ||
                    item.itemIdentifier == KMToolbarPageEditRightRotateItemIdentifier ||
                    item.itemIdentifier == KMToolbarPageEditReplaceItemIdentifier) {
                    item.unEnabled = !enabled
                } else if (item.itemIdentifier == KMToolbarPageEditReverseItemIdentifier) {
                    item.unEnabled = !(selectedIndexs.count > 1)
                } else if (item.itemIdentifier == KMToolbarPageEditDeleteItemIdentifier) {
                    item.unEnabled = !self.canDelete()
                }
            }
            
            if (self.pageIsUpdate == false) {
                self.pageIsUpdate = true
                return
            }
            
            var indexs: Array<Int> = []
            for indexPath in selectedIndexs {
                indexs.append(indexPath.item)
            }
            indexs.sort(){$0 < $1}
            self.toolBar.setPageRangeString(KMPageRangeTools.newParseSelectedIndexs(selectedIndex: indexs))
            
            if let view = self.listView { // 存储阅读视图的当前页面索引
                if indexs.count != 0 {
                    self._listViewCurrentIndex = indexs.last!
                }
            }
        }
    }
    
    // MARK: Private Methods
    
    private func getSelecteIndex() -> Int {
        let index = self.getPasteIndex()
        if (index != NSNotFound) {
            return index
        }
        return 0
    }
    
    private func getSelectedPage() -> CPDFPage {
        return (self.pdfDocument!.page(at: UInt(getSelecteIndex())))!
    }
    
    private func selectPages(indexs: IndexSet) {
        var indexpaths: Set<IndexPath> = []
        for index in indexs {
            indexpaths.insert(IndexPath(item: index, section: 0))
        }
        self.selectPages(indexpaths: indexpaths)
    }
    
    private func km_becomeFirstResponder() {
        DispatchQueue.main.async {
            self.view.window?.makeFirstResponder(self)
        }
    }
    
    fileprivate func dealPdfDocumentDidEditCallback(type: KMPageEditType = .none) {
        // 提醒外面文档已编辑
        guard let callback = self.documentEditedCallback else {
            return
        }
        callback(type)
    }
    
    // MARK: - 清空选择
    
    private func clearSelectPages() {
        self.selectPages(indexs: IndexSet())
    }
    
    override func refreshUI(indexpaths: Set<IndexPath> = [], keepSelected: Bool = false) {
        super.refreshUI(indexpaths: indexpaths, keepSelected: keepSelected)
        
        self.listView?.layoutDocumentView()
    }
    
    override func cutAction() {
        if (self.thumbnailView.selectionIndexPaths.count == (self.listView?.document.pageCount)!) {
            let _ = CustomAlertView.alertView(message: NSLocalizedString("Unable to delete all pages", comment: ""), fromView: self.thumbnailView, withStyle: .blue)
            return
        }
        super.cutAction()
    }
    
    override func copyAction() {
        self.trackEvent_copy()
        
        super.copyAction()
    }
    
    override func deleteAction() {
        self.trackEvent(type: .delete)
        
        super.deleteAction()
        
        self.toolBar.unSelectItem(for: KMToolbarPageEditDeleteItemIdentifier)
    }
    
    override func deleteIndexPaths(indexpaths: Set<IndexPath>) {
        guard let pageCount = self.thumbnailView.document?.pageCount else {
            KMPrint("pageCount invalid.")
            return
        }
        if (indexpaths.count == pageCount) {
            let _ = CustomAlertView.alertView(message: NSLocalizedString("Unable to delete all pages", comment: ""), fromView: self.thumbnailView, withStyle: .blue)
            return
        }
        
        self.dealPdfDocumentDidEditCallback(type: .delete)
        
        super.deleteIndexPaths(indexpaths: indexpaths)
    }
    
    override func leftRotateAction() {
        self.trackEvent(type: .leftRotate)
        
        super.leftRotateAction()
        
//        self.toolBar.unSelectItem(for: KMToolbarPageEditLeftRotateItemIdentifier)
    }
    
    override func leftRotateIndexpaths(indexpaths: Set<IndexPath>) {
        if (!self.indexpathsIsValid(indexpaths: indexpaths) || !self.canRotate()) {
            return
        }
        super.leftRotateIndexpaths(indexpaths: indexpaths)
        self.dealPdfDocumentDidEditCallback(type: .leftRotate)
    }
    
    override func rightRotateAction() {
        self.trackEvent(type: .rightRotate)
        
        super.rightRotateAction()
        
//        self.toolBar.unSelectItem(for: KMToolbarPageEditRightRotateItemIdentifier)
    }
    
    override func rightRotateIndexpaths(indexpaths: Set<IndexPath>) {
        if (!self.indexpathsIsValid(indexpaths: indexpaths) || !self.canRotate()) {
            return
        }
        
        super.rightRotateIndexpaths(indexpaths: indexpaths)
        self.dealPdfDocumentDidEditCallback(type: .rightRotate)
    }
    
    override func insertPages(pages: Array<CPDFPage>, at indexs: IndexSet) {
        super.insertPages(pages: pages, at: indexs)
        
        if (!indexs.isEmpty) {
            self.selectPages(indexs: indexs)
            self.dealPdfDocumentDidEditCallback(type: .insert)
        }
    }
    
    override func pasteAction() {
        if (self.canPaste()) {
            super.pasteAction()
            
            self.dealPdfDocumentDidEditCallback(type: .paste)
        }
    }
    
    override func extractAction() {
        self.trackEvent(type: .extract)
        
        super.extractAction()
        
        DispatchQueue.main.async {
            self.toolBar.unSelectItem(for: KMToolbarPageEditExtractItemIdentifier)
        }
    }
    
    override func replaceAction() {
        self.trackEvent(type: .replace)
        
        super.replaceAction()
        
        DispatchQueue.main.async {
            self.toolBar.unSelectItem(for: KMToolbarPageEditReplaceItemIdentifier)
        }
    }
    
    override func getInsertIndex() -> Int {
        var index = 0
        if let pageCount = self.thumbnailView.document?.pageCount, pageCount > 0 {
            // 默认为最后一页
            index = Int(pageCount-1)
        }
        
        // 在当前选中item之后插入
        // 多选时，则取最后一页
        for indexpath in self.thumbnailView.selectionIndexPaths.sorted() {
            index = indexpath.item
        }
        return index
    }
    
    override func splitAction() {
//        self.trackEvent(type: .split)
//
//        Task { @MainActor in
//            self.toolBar.unSelectItem(for: KMToolbarPageEditSplitItemIdentifier)
//
//            self.showSplitWindow { [unowned self] splitWindowC, model in
//                if (!self.canPayFunction) {
//                    _ = KMSubscribeWaterMarkWindowController.show(window: splitWindowC.window!, type: .split) { isSubscribeSuccess, isWaterMarkExport, isClose in
//                        if (isClose) {
//                            return
//                        }
//                        if (isSubscribeSuccess) {
//                            self.km_endSheet()
//                            self._splitMethod(windowC: splitWindowC, model: model)
//                            return
//                        }
//                        if (isWaterMarkExport) {
//                            self.km_endSheet()
//                            self._splitMethod(windowC: splitWindowC, model: model, limit: true)
//                            return
//                        }
//                    }
//                    return
//                }
//
//                /// 拆分
//                self._splitMethod(windowC: splitWindowC, model: model)
//            }
//        }
        
        let windowC = SplitWindowController(document: self.pdfDocument!)
        self.km_beginSheet(windowC: windowC)
    }
    
    func splitMethod(windowC: KMPageEditSplitWindowController, model: KMPageEditSplitSettingModel, limit: Bool = false) {
        self._splitMethod(windowC: windowC, model: model, limit: limit)
    }
    
    func splitMenuAction() {
//        if (![IAPProductsManager defaultManager].isAvailableAllFunction) {
//    #if VERSION_DMG
//            [[KMPurchaseCompareWindowController sharedInstance] showWindow:nil];
//    #else
//            KMToolCompareWindowController * vc = [KMToolCompareWindowController toolCompareWithType:KMCompareWithToolType_PageEdit setSelectIndex:1];
//            [vc startModal:nil];
//    #endif
//            return;
//        }

        let pdf = self.thumbnailView.document
        let pages = self.thumbnailView.selectionIndexPaths
        if (pages.isEmpty == false) {
            let fileAttribute = KMFileAttribute()
            fileAttribute.bAllPage = false
            fileAttribute.pagesType = .custom
            fileAttribute.filePath = pdf?.documentURL.path ?? ""
            fileAttribute.pdfDocument = pdf
//            fileAttribute.pagesString = [self fileNameWithSelectedPages];
            fileAttribute.pagesString = KMPageRangeTools.newParseSelectedIndexs(selectedIndex: self.indexpathsToIndexs(indexpaths: pages).sorted())

            if (fileAttribute.fetchSelectPages().isEmpty) {
                KMAlertTool.runModelForMainThread(message: KMLocalizedString("Invalid page range or the page number is out of range. Please try again.", nil))
            } else {
                let panel = NSOpenPanel()
                panel.canChooseFiles = false
                panel.canChooseDirectories = true
                panel.canCreateDirectories = true
                panel.beginSheetModal(for: self.view.window!) { result in
                    if (result == .OK) {
                        let outputURL = panel.urls.first!
                        var tFolderPath = outputURL.path
                        
                        var index = 0
                        var folderName = self.pdfDocument?.documentURL.deletingPathExtension().lastPathComponent
                        if folderName == nil {
                            folderName = KMLocalizedString("Untitled", nil)
                        }
                        var folderPath = "\(tFolderPath)/\(folderName!)"
                        //创建目录
                        while (FileManager.default.fileExists(atPath: folderPath)) {
                            index += 1
                            folderPath = "\(tFolderPath)/\(folderName!)_\(index)"
//                            folderPath = [tFolderPath stringByAppendingPathComponent:[NSString stringWithFormat:@"%@_%ld",folderName,index]];
                        }
                        tFolderPath = folderPath
                        let result = try?FileManager.default.createDirectory(atPath: tFolderPath, withIntermediateDirectories: true)
                        if (result == nil) {
//                        if (![[NSFileManager defaultManager] createDirectoryAtPath:tFolderPath withIntermediateDirectories:YES attributes:nil error:nil]) {
                            KMAlertTool.runModelForMainThread(message: KMLocalizedString("Failed to split!", nil))
                            return;
                        }
                        let vc = KMProgressWindowController()
                        NSApp.beginSheet(vc.window!, modalFor: self.view.window!, modalDelegate: nil, didEnd: nil, contextInfo: nil)
                        DispatchQueue.global().async {
//                            NSArray * successArray = [self.pdfDocument splitByFileWithPages:fileAttribute folerPath:tFolderPath fileName:folderName];
                            let successArray = self.pdfDocument?.splitByFileWithPages(fileAttribute, folerPath: tFolderPath, fileName: folderName ?? "")
                            DispatchQueue.main.async {
                                if let cnt = successArray?.count, cnt > 0 {
                                    let filePath = successArray!.first!
                                    
                                    let workSpace = NSWorkspace.shared
                                    workSpace.activateFileViewerSelecting([URL(fileURLWithPath: filePath)])
                                } else {
                                    KMAlertTool.runModelForMainThread(message: KMLocalizedString("Failed to split!", nil))
                                }
                                NSApp.endSheet(vc.window!)
                                vc.close()
                            }
                        }
                    }
                }
            }
        } else{
            let contextString = KMLocalizedString("No pages selected. Please select one or more pages first to organize.",nil)
            CustomAlertView.alertView(message: contextString, fromView: self.thumbnailView, withStyle: .blue)
        }
    }
    
    override func reverseAction() {
        self.trackEvent(type: .reverse)
        
//        Task { @MainActor in
            self.toolBar.unSelectItem(for: KMToolbarPageEditReverseItemIdentifier)
            self.reverseMenuAction(sender: nil)
//        }
    }
    
    func showSplitWindow(callback: @escaping (KMPageEditSplitWindowController, KMPageEditSplitSettingModel)->Void) {
        let model = KMPageEditSplitSettingModel()
        model.documentURL = self.listView?.document.documentURL
        if let pagecnt = self.thumbnailView.document?.pageCount {
            model.pageCount = Int(pagecnt)
        }
        
        model.fileName = model.documentURL.lastPathComponent
        model.pathExtension = model.fileName.components(separatedBy: ".").last
        
        if (self.thumbnailView.selectionIndexPaths.count > 0) {
            model.type = 2
            model.pageRangeType = 2
            var selectedIndexs: Array<Int> = []
            for indexpath in self.thumbnailView.selectionIndexPaths {
                selectedIndexs.append(indexpath.item)
            }
            
            model.pageRangeString = KMPageRangeTools.newParseSelectedIndexs(selectedIndex: selectedIndexs)
        } else {
            model.type = 0
        }
        
        let windowController = KMPageEditSplitWindowController(model)
        self.km_beginSheet(windowC: windowController)
        
        windowController.itemClick = { [weak self] index, value in
            if (index == 1) { /// 取消
                self?.km_endSheet()
                return
            }
            guard let _windowC = self?.kmCurrentWindowC as? KMPageEditSplitWindowController else {
                self?.km_endSheet()
                return
            }
            
            callback(_windowC, model)
        }
    }
    
    private func _splitMethod(windowC: KMPageEditSplitWindowController, model: KMPageEditSplitSettingModel, limit: Bool = false) {
        let outputModel = windowC.model! as! KMPageEditSplitSettingModel
        
        DispatchQueue.main.async {
            let panel = NSOpenPanel()
            panel.canChooseFiles = false
            panel.canChooseDirectories = true
            panel.canCreateDirectories = true
            panel.beginSheetModal(for: NSWindow.currentWindow()) { response in
                if (response == .cancel) {
                    return
                }
                
                let file_indexs = outputModel.getSplitIndexSets
                if (file_indexs == nil || file_indexs!.count <= 0) {
                    return
                }
                
                DispatchQueue.main.async {
                    self.showProgressWindow(message: NSLocalizedString("Spliting...", comment: ""))
                    self.progressC?.maxValue = Double(file_indexs!.count)
                    let _document: CPDFDocument = (self.listView?.document)!
                    
                    let filePath = "\(panel.url!.path)/\(_document.documentURL.deletingPathExtension().lastPathComponent)"
                    let uniqueFilePath = KMTools.getUniqueFilePath(filePath: filePath)
                    //                    Swift.debugPrint(uniqueFilePath)
                    if (!FileManager.default.fileExists(atPath: uniqueFilePath)) {
                        try?FileManager.default.createDirectory(atPath: uniqueFilePath, withIntermediateDirectories: true)
                    }
                    
                    var filepaths: [String] = []
                    for i in 0 ..< file_indexs!.count {
                        let indexs = file_indexs![i]
                        if (indexs.isEmpty) {
                            continue
                        }
                        let filepath = String(format: "%@/%@.pdf", uniqueFilePath, model.getNewOutputFileName(index: i+1))
                        filepaths.append(filepath)
                        
                        let newDocument = CPDFDocument()
                        newDocument?.importPages(indexs, from: _document, at: 0)
                        self.progressC?.increment(by: 1.0)
                        if (limit) {
                            let _ = KMTools.saveWatermarkDocument(document: newDocument!, to: URL(fileURLWithPath: filepath))
                        } else {
                            newDocument?.write(to: URL(fileURLWithPath: filepath))
                        }
                    }
                    self.hiddenProgressWindow()
                    self.km_endSheet()
                    if let _urlString = filepaths.first?.deletingLastPathComponent {
                        NSWorkspace.shared.activateFileViewerSelecting([URL(fileURLWithPath: _urlString)])
                    }
                }
            }
        }
    }
    
    // MARK: Undo / Redo
    
    @objc private func reversePages(indexs: IndexSet) {
        KMPageEditTools.reverse((self.thumbnailView.document)!, indexs
        ) { result, error in
            if (result) {
                self.refreshUI(indexpaths: self.indexsToIndexpaths(indexs: indexs), keepSelected: true)
                
                self.kmUndoManager?.registerUndo(withTarget: self, selector: #selector(self.reversePages), object: indexs)
            }
        }
    }
    
    @objc private func dragPages(_ indexs: IndexSet, _ toIndex: Int, dp: NSCollectionView.DropOperation, reversed: Bool = false) {
        if (indexs.count <= 0) {
            return
        }
        
        self.listViewCurrentPageUpdateForDrag(indexs: indexs, toIndex: toIndex)
        
        // 插入位置偏移量
        var toIndexOffset: Int = 0
        // 需要移动的页面index数组
        var newPages: [CPDFPage] = []
        var currentPage: CPDFPage?
        var originalIndex = self.listViewCurrentIndex
        // 从后面往前删除
        for index in indexs.reversed() {
            let newPage = (self.listView?.document.page(at: UInt(index)))?.copy() as? CPDFPage
            if (newPage == nil) {
                continue
            }
            newPages.insert(newPage!, at: 0)
            self.listView?.document.removePage(at: UInt(index))
            if (index < toIndex) { /// 删除了插入位置前面的页面，需要改变 toIndex
                toIndexOffset += 1
            }
            if (currentPage == nil) && (originalIndex == index)  {
                currentPage = newPage
            }
        }
        if (indexs.last! < toIndex && dp == .on) { // 往后拖拽
            toIndexOffset -= 1
        }
        let insertIndex = max(0, toIndex-toIndexOffset)
        var selectIndexs: IndexSet = []
        for (index, page) in newPages.enumerated() {
            self.listView?.document.insertPageObject(page, at: UInt(insertIndex+index))
            selectIndexs.insert(insertIndex+index)
            if (currentPage?.pageIndex() == page.pageIndex()) {
//                self._listViewCurrentIndex = insertIndex+index
            }
        }
        
        // 新增 undo
        self.kmUndoManager?.registerUndo(withTarget: self) { target in
            target.clearSelectPages()
            target.dragPages_reversed(indexs, toIndex, newPages, dp: dp)
        }
        
        // 刷新UI
        self.refreshUI()
        
        if (reversed == false) {
            self.selectPages(indexs: selectIndexs)
        }
    }
    
    @objc private func dragPages_reversed(_ indexs: IndexSet, _ toIndex: Int, _ pages: [CPDFPage], dp: NSCollectionView.DropOperation) {
        if (indexs.count <= 0) {
            return
        }
        
        // 插入位置偏移量
        var toIndexOffset: Int = 0
        for index in indexs {
            if (index < toIndex) { /// 删除了插入位置前面的页面，需要改变 toIndex
                toIndexOffset += 1
            }
        }
        if (indexs.last! < toIndex && dp == .on) { // 往后拖拽
            toIndexOffset -= 1
        }
        let insertIndex = max(0, toIndex-toIndexOffset)
        // 需要移动的页面index数组
        var datas: [Int] = []
        for index in insertIndex ..< (insertIndex + indexs.count) {
            datas.append(index)
        }
        
        // 从后面开始删除
        for index in datas.reversed() {
            self.listView?.document.removePage(at: UInt(index))
        }
        // 再插入到对应的位置
        for (index,value) in indexs.enumerated() {
            var page: CPDFPage?
            if (index < pages.count) {
                page = pages[index]
            }
            if (page != nil) {
                self.listView?.document.insertPageObject(page!, at: UInt(value))
            }
            
        }
        // 新增 undo
        self.kmUndoManager?.registerUndo(withTarget: self) { target in
            target.dragPages(indexs, toIndex, dp: dp, reversed: true)
        }
        // 刷新UI
        self.refreshUI()
    }
    
    // MARK: topBar 事件
    
    @objc func zoomOutButtonAction(sender: NSButton?) {
        if (self.itemSize.width > self.defaultItemSize.width) {
            return
        }
        
        if let _document = self.thumbnailView.document {
            for i in 0 ..< _document.pageCount {
                let page = _document.page(at: i)
                page?.pageEditImage = nil
            }
        }
        
        if (self.itemSize.width < self.defaultItemSize.width) {
            self.itemSize = self.defaultItemSize
        } else if (self.itemSize.width == self.defaultItemSize.width) {
            self.itemSize = NSSize(width: self.defaultItemSize.width*2, height: self.defaultItemSize.height*2)
        }

//        self.toolBar.zoomInButton?.isEnabled = true
//        if (self.itemSize.width > self.defaultItemSize.width) {
//            sender?.isEnabled = false
//        }
        self.pageEditThumbnailView.zoomOut()
    }
    
    @objc func zoomInButtonAction(sender: NSButton?) {
        if (self.itemSize.width < self.defaultItemSize.width) {
            return
        }
        
        if let _document = self.thumbnailView.document {
            for i in 0 ..< _document.pageCount {
                let page = _document.page(at: i)
                page?.pageEditImage = nil
            }
        }
        
        if (self.itemSize.width > self.defaultItemSize.width) {
            self.itemSize = self.defaultItemSize
        } else if (self.itemSize.width == self.defaultItemSize.width) {
            self.itemSize = NSSize(width: self.defaultItemSize.width*0.5, height: self.defaultItemSize.height*0.5)
        }

//        self.toolBar.zoomOutButton?.isEnabled = true
//        if (self.itemSize.width < self.defaultItemSize.width) {
//            sender?.isEnabled = false
//        }
        self.pageEditThumbnailView.zoomIn()
    }
    
    // MARK: menu 菜单事件
    
    @objc func item_insertCustomPage(sender: NSMenuItem?) {
        let windowC = KMPDFEditInsertBlankPageWindow(document: self.pdfDocument!)
        windowC.callback = { [weak self] pdfDoc, _, pages, insertI in
            if let _pages = pages {
//                self?.insertPages(pages: _pages, at: IndexSet(integer: insertI+1))
                // mm 单位的大小
                guard let _winC = self?.kmCurrentWindowC as? KMPDFEditInsertBlankPageWindow else {
                    self?.km_endSheet()
                    return
                }
                var pageSize = _winC.pageSize
                let direction = windowC.pageRotation == 0 ? 0 : 1
//                var _pageSize = KMPageEditTools.sizeUnitToBoundSize(unit: .mm, pageSize: pageSize)
                
                if (direction == 0) { // 纵向
                    if (pageSize.width > pageSize.height) { // 需要交换
                        let tmp = pageSize.width
                        pageSize.width = pageSize.height
                        pageSize.height = tmp
                    } else {
                        // no things.
                    }
                } else { // 横向
                    if (pageSize.width > pageSize.height) {
                        // no things.
                    } else { // 需要交换
                        let tmp = pageSize.width
                        pageSize.width = pageSize.height
                        pageSize.height = tmp
                    }
                }
                
                /// 插入位置
                let document = CPDFDocument()
                document?.insertPage(pageSize, at: 0)
                if let page: CPDFPage = (document?.page(at: 0)) {
                    self?.insertPages(pages: [page], at: IndexSet(integer: insertI))
                }
            }
            
            self?.km_endSheet()
        }
        self.km_beginSheet(windowC: windowC)
        #if false
        Task { @MainActor in
            let windowController = KMPageEditInsertCustomPageWindowController()
            if (self.thumbnailView.selectionIndexPaths.count > 0) {
                let page = self.getSelectedPage()
                let width = page.bounds.size.width * 210 / 595
                let height = page.bounds.size.height * 297 / 842
                windowController.selectedPageSize = NSSize(width: width, height: height)
//                windowController.selectedPageSize = self.getSelectedPage().bounds.size
            }
            
            self.km_beginSheet(windowC: windowController)
            windowController.itemClick = { [weak self] index in
                if (index == 1) { /// 取消
                    self?.km_endSheet()
                    return
                }
                
                /// 插入
                guard let windowC = self?.kmCurrentWindowC as? KMPageEditInsertCustomPageWindowController else {
                    self?.km_endSheet()
                    return
                }
                guard let _insertIndex = self?.getInsertIndex() else {
                    self?.km_endSheet()
                    return
                }
                
                /// 样式
                //            let type = windowC.typeIndex
                // mm 单位的大小
                let pageSize = windowC.pageSize
                let direction = windowC.direction
                var _pageSize = KMPageEditTools.sizeUnitToBoundSize(unit: .mm, pageSize: pageSize)
                
                if (direction == 0) { // 纵向
                    if (_pageSize.width > _pageSize.height) { // 需要交换
                        let tmp = _pageSize.width
                        _pageSize.width = _pageSize.height
                        _pageSize.height = tmp
                    } else {
                        // no things.
                    }
                } else { // 横向
                    if (_pageSize.width > _pageSize.height) {
                        // no things.
                    } else { // 需要交换
                        let tmp = _pageSize.width
                        _pageSize.width = _pageSize.height
                        _pageSize.height = tmp
                    }
                }
                
                /// 插入位置
                let document = CPDFDocument()
                document?.insertPage(_pageSize, at: 0)
                if let page: CPDFPage = (document?.page(at: 0)) {
                    self?.insertPages(pages: [page], at: IndexSet(integer: _insertIndex+1))
                }

                self?.km_endSheet()
            }
        }
        #endif
    }
    
    func extractSelectPageItemAction() {
        let indexs = self.thumbnailView.selectionIndexPaths
        if indexs.isEmpty {
            CustomAlertView.alertView(message: KMLocalizedString("No pages selected. Please select one or more pages first to organize.",nil), fromView: self.thumbnailView, withStyle: .blue)
            return
        }
        
        self.extractPages(indexpaths: indexs, oneDocumentPerPage: false) { result, params in }
    }
    
    // MARK: toolBar 菜单事件
    
    @objc func reverseMenuAction(sender: AnyObject?) {
        let selectedIndexs = self.thumbnailView.selectionIndexPaths
        if (selectedIndexs.count < 2 ) {
            let alertView = CustomAlertView.alertView(message: NSLocalizedString("Please select at least two pages for editing first", comment: ""), fromView: self.thumbnailView, withStyle: .blue)
            alertView?.layer?.backgroundColor = NSColor.km_init(hex: "#36383B").cgColor
            alertView?.layer?.cornerRadius = 4
            return
        }
        
        var indexs: IndexSet = []
        for indexpath in selectedIndexs {
            indexs.insert(indexpath.item)
        }
        
        self.reversePages(indexs: indexs)
        self.dealPdfDocumentDidEditCallback(type: .reverse)
    }
    
    override func addMenuItem(menu: NSMenu, item: KMPDFThumbViewMenu.Item) -> NSMenuItem? {
        var item_: NSMenuItem?
        if (item.sel == KMPDFThumbViewMenu.insertSelector) {
//            if (self.thumbnailView.selectionIndexPaths.count == 1) {
//                item_ = menu.addItem(withTitle: NSLocalizedString("Insert", comment: ""), action: nil, target: self)
                item_ = menu.addItem(withTitle: NSLocalizedString("Blank Page", comment: ""), action: #selector(insertPageItemAction), target: self)
                
//                let subMenu = NSMenu()
//                subMenu.addItem(withTitle: NSLocalizedString("Insert a Blank Page", comment: ""), action: #selector(insertPageItemAction), target: self, tag:0)
//                subMenu.addItem(withTitle: NSLocalizedString("Insert Custom Page", comment: ""), action: #selector(insertPageItemAction), target: self, tag:1)
//                subMenu.addItem(withTitle: NSLocalizedString("Insert File", comment: ""), action: #selector(insertPageItemAction), target: self, tag:2)
//                item_?.submenu = subMenu
//            }
        } else if (item.sel == KMPDFThumbViewMenu.splitSelector) {
            if (self.thumbnailView.selectionIndexPaths.count > 1) {
                item_ = menu.addItem(withTitle: NSLocalizedString("Split", comment: ""), action: KMPDFThumbViewMenu.splitSelector, target: self)
            }
        } else if (item.sel == KMPDFThumbViewMenu.reverseSelector) {
            if (self.thumbnailView.selectionIndexPaths.count > 1) {
                item_ = menu.addItem(withTitle: NSLocalizedString("Reverse", comment: ""), action: KMPDFThumbViewMenu.reverseSelector, target: self)
            }
        } else {
            return super.addMenuItem(menu: menu, item: item)
        }
        return item_
    }
    
    // MARK: - Zoom Methods
    
    @IBAction func buttonClicked_Bigger(_ sender: AnyObject?) {
//        if (self.thumbnailView.thumbnailSize.width == 100.) {
//            self.thumbnailView.thumbnailSize = CGSizeMake(200, 200);
//        } else if (self.thumbnailView.thumbnailSize.width == 200.) {
//            self.thumbnailView.thumbnailSize = CGSizeMake(400, 400);
//        }
        self.zoomOutButtonAction(sender: sender as? NSButton)
    }
    
    @IBAction func buttonClicked_Smaller(_ sender: AnyObject?) {
//        if (self.thumbnailView.thumbnailSize.width == 400.) {
//            self.thumbnailView.thumbnailSize = CGSizeMake(200, 200);
//        } else if (self.thumbnailView.thumbnailSize.width == 200.) {
//            self.thumbnailView.thumbnailSize = CGSizeMake(100, 100);
//        }
        self.zoomInButtonAction(sender: sender as? NSButton)
    }
}

extension KMPDFEditViewController {
    //MARK: menu Action
    
    @objc func insertPageItemAction(menu:NSMenuItem) {
        if (menu.tag == 0) {
            self.insertBlankPageAction()
        } else if (menu.tag == 1) {
            self.item_insertCustomPage(sender: nil)
        } else if (menu.tag == 2) {
            self.insertFileAction()
        }
    }
    
    @objc func sharePageItemAction(menu:NSMenuItem) {
        let item = menu.parent!
        let index = (item.representedObject as! IndexSet).first ?? -1
        if Int(index) >= 0 {
            let doucument = self.pdfDocument!
            let page = doucument.page(at: UInt(index))
            let filename : String = doucument.documentURL.lastPathComponent
            let folderPath = (NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.applicationSupportDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last?.stringByAppendingPathComponent(filename))!
            try? FileManager.default.removeItem(atPath: folderPath)
            let pdfdocument = CPDFDocument()
            let ret = pdfdocument!.importPages((item.representedObject as! IndexSet), from: self.thumbnailView.document, at: 0)
            let url = URL(fileURLWithPath: folderPath)
            if ret {
                let success = pdfdocument!.write(to:url)
                if success {
                    let workspace = NSWorkspace.shared
                    workspace.activateFileViewerSelecting([url])
                }
            }
            let represent : NSSharingService = menu.representedObject as! NSSharingService
            represent.perform(withItems: [url])
            
        }
    }
    
    @objc func showPageSizeItemAction(menu: NSMenuItem) {
        self.thumbnailView.isShowPageSize = !self.thumbnailView.isShowPageSize
        
        self.refreshUIForKeepSelecteds()
    }
    
    @objc func printItemAction(menu:NSMenuItem) {
        var datas: [Int] = []
        for indexpath in self.thumbnailView.selectionIndexPaths {
            datas.append(indexpath.item)
        }
        
        guard let callback = self.itemClick else {
            return
        }
        
        callback(2, datas.sorted())
    }
}

extension KMPDFEditViewController {
    override func menuItemAction_print(_ sender: Any?) {
        self.printItemAction(menu: sender as! NSMenuItem)
    }
    override func menuItemAction_showPageSize(_ sender: Any?) {
        self.showPageSizeItemAction(menu: sender as! NSMenuItem)
    }
    override func menuItemAction_share(_ sender: Any?) {
        self.sharePageItemAction(menu: sender as! NSMenuItem)
    }
}

// MARK: - KMSelectPopButtonDelegate

extension KMPDFEditViewController {
    func km_comboBoxSelectionDidChange(_ obj: KMPageRange) {
        self.pageIsUpdate = false
        
//        let index: Int = obj.indexOfSelectedItem
        let index = obj.rawValue
        var indexpaths: Set<IndexPath> = []
        var type: KMPageRange? = obj
//        if (index <= 0) { /// 全部页面
//            type = .all
//        } else if (index == 1) { /// 奇数页
//            type = .odd
//        } else if (index == 2) { /// 偶数页
//            type = .even
//        } else if (index == 3) { /// 横向页
//            type = .horizontal
//        } else if (index == 4) { /// 纵向页
//            type = .vertical
//        } else { /// 自定义
//            type = .custom
//        }
        
        for i in 0 ..< (self.pdfDocument?.pageCount)! {
            if (type == .all) {
                indexpaths.insert(IndexPath(item: Int(i), section: 0))
            } else if (type == .odd) {
                if (i % 2 == 1) {
                    continue
                }
                indexpaths.insert(IndexPath(item: Int(i), section: 0))
            } else if (type == .even) {
                if (i % 2 == 0) {
                    continue
                }
                indexpaths.insert(IndexPath(item: Int(i), section: 0))
            } else if (type == .horizontal) {
                let page = self.pdfDocument?.page(at: i)
                guard let isVertical = page?.isVertical(), !isVertical else {
                    continue
                }
                indexpaths.insert(IndexPath(item: Int(i), section: 0))
            } else if (type == .vertical) {
                let page = self.pdfDocument?.page(at: i)
                guard let isHorizontal = page?.isHorizontal(), !isHorizontal else {
                    continue
                }
                indexpaths.insert(IndexPath(item: Int(i), section: 0))
            }
        }
        
//        obj.editable = type == .custom
        if (type == .custom) {
            let windowC = KMPDFEditPageRangeWindowController()
            windowC.pdfDocument = self.pdfDocument
            windowC.pageSelectCallBack = { [weak self] pagesArray in
                var indexpaths = Set<IndexPath>()
                for page in pagesArray {
                    indexpaths.insert(IndexPath(item: page-1, section: 0))
                }
                
                self?.selectPages(indexpaths: indexpaths)
                self?.km_endSheet()
            }
            self.km_beginSheet(windowC: windowC)
            
        } else {
            self.pageEditThumbnailView.selectPages(at: indexpaths)
        }
    }
    
    func km_controlTextDidEndEditing(_ obj: KMDesignSelect) {
        self.view.window?.makeFirstResponder(self)
        
        for index in 0 ..< obj.numberOfItems {
            if (obj.items[index] == obj.stringValue) {
                return
            }
        }
        
        let pages = KMPageRangeTools.findSelectPage(pageRangeString: self.toolBar.pageRangeView!.stringValue, pageCount: Int((self.listView?.document.pageCount)!))
        if (pages.isEmpty) {
            let alert = NSAlert()
            alert.messageText = NSLocalizedString("Invalid page range or the page number is out of range. Please try again.", comment: "")
            alert.runModal()
            self.toolBar.setPageRangeString("")
            DispatchQueue.main.async {
                self.view.window?.makeFirstResponder(self.toolBar.pageRangeView?.textField)
            }
            return
        }
        
        var indexpaths: Set<IndexPath> = []
        for page in pages {
            if (page >= 1) {
                indexpaths.insert(IndexPath(item: page-1, section: 0))
            }
        }
        
        self.pageIsUpdate = false
        self.pageEditThumbnailView.selectPages(at: indexpaths)
    }
}

// MARK: -
// MARK: KMThumbnailViewDelegate

extension KMPDFEditViewController: KMThumbnailViewDelegate {
    func thumbnailView(thumbanView: KMThumbnailView, shouldAcceptDrop draggingInfo: NSDraggingInfo, indexPath: IndexPath, dropOperation: NSCollectionView.DropOperation) -> Bool {
        return true
    }
    func thumbnailView(thumbanView: KMThumbnailView, didDragAddFiles files: [URL], indexpath: IndexPath) {
        self.km_add_file_multi(fileUrls: files) { index, params in
            if (self.fetchProgressBlockParamsIsPasswordFile(params: params)) { // 加密文档进度回调
                return
            }
            
            let _fileUrl = self.fetchProgressBlockParamsForFileUrl(params: params)
            if let exn = _fileUrl?.pathExtension, KMTools.isPDFType(exn) {
                if (_fileUrl!.path.isPDFValid() == false) {
                    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()
                }
            }
        } completionBlock: { [unowned self] documents in
            var insertIndex: Int = indexpath.item
            var pages: Array<CPDFPage> = []
            var indexs = IndexSet()
            for document in documents {
                for i in 0 ..< document.pageCount {
                    let page = document.page(at: i)
                    pages.append(page!)
                    indexs.insert(insertIndex)
                    insertIndex += 1
                }
            }
            self.insertPages(pages: pages, at: indexs)
        }
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, didDrag dragedIndexPaths: [IndexPath], indexpath: IndexPath, dragInfo: [KMThumbnailViewDragInfoKey.RawValue : Any]) {
        let toIndex = max(0, indexpath.item)
        var indexs = IndexSet()
        for indexpath in dragedIndexPaths {
            indexs.insert(indexpath.item)
        }
        
        var dp = NSCollectionView.DropOperation.on
        if let _dp = dragInfo[KMThumbnailViewDragInfoKey.dropOperation.rawValue] as? NSCollectionView.DropOperation {
            dp = _dp
        }
        
        self.dragPages(indexs, toIndex, dp: dp)
        
        if (dragedIndexPaths.count > 0) {
            self.dealPdfDocumentDidEditCallback()
        }
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, shouldPasteboardWriterForItemAt indexPath: IndexPath) -> Bool {
        if (!self.canPayFunction) {
            return false
        }

        return true
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, insetForSectionAt section: Int) -> NSEdgeInsets {
        return NSEdgeInsets(top: 6, left: 6, bottom: 0, right: 6)
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, sizeForItemAt indexpath: IndexPath) -> NSSize {
        self.thumbnailView.thumbnailSzie = CGSize(width: 120, height: 155)
        if (!self.thumbnailView.isShowPageSize) {
            return NSMakeSize(self.itemSize.width, self.itemSize.height+26)
        }
        return self.itemSize
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, numberOfItemsInSection section: Int) -> Int {
        if let count = self.pdfDocument?.pageCount {
            return Int(count)
        }
        return 0
    }
    
    func thumbnailView(thumbanView: KMThumbnailView, itemForRepresentedObjectAt indexpath: IndexPath) -> NSCollectionViewItem {
        let cellView: KMPageEditThumbnailItem = thumbanView.collectionView.km.dequeueReusableCell(for: indexpath)
        cellView.isShowPageSize = self.thumbnailView.isShowPageSize
        cellView.setPage(page: (self.pdfDocument?.page(at: UInt(indexpath.item)))!)
        
        cellView.doubleClickAction = { [unowned self] _ in
            guard let callback = self.itemClick else {
                return
            }
            callback(1, indexpath.item)
        }
        cellView.mouseDownAction = { [unowned self] _ in
            let selectionIndexPaths = self.thumbnailView.selectionIndexPaths
            if (selectionIndexPaths.count == 1 && selectionIndexPaths.first?.item == indexpath.item) {
                return
            }
            
            self.selectPages(indexs: IndexSet.init(integer: indexpath.item))
        }
        
        cellView.rightMouseDownAction = { [unowned self] _ in
            self.selectPages(indexs: IndexSet.init(integer: indexpath.item))
        }
        
        return cellView
    }
}

// MARK: - 系统菜单栏

extension KMPDFEditViewController {
    override func undo(_ sender: Any?) {
        super.undo(sender)
        
        self.km_becomeFirstResponder()
    }
    
    override func redo(_ sender: Any?) {
        super.redo(sender)
        
        self.km_becomeFirstResponder()
    }
}

// MARK: - KMExtensions

extension KMPDFEditViewController {
    override func deleteAfter(indexpaths: Set<IndexPath>) {
        self.clearSelectPages()
        self.km_becomeFirstResponder()
    }
    override func copyAfter(indexpaths: Set<IndexPath>) {
        self.km_becomeFirstResponder()
    }
    override func pasteAfter(at index: Int) {
        self.km_becomeFirstResponder()
    }
    override func cutAfter(indexpaths: Set<IndexPath>) {
        self.clearSelectPages()
        self.km_becomeFirstResponder()
    }
    override func leftRotateAfter(indexpaths: Set<IndexPath>) {
        NotificationCenter.default.post(name: NSNotification.Name(rawValue: "KMPDFViewRotatePage"), object: self.thumbnailView.document)
        
        self.km_becomeFirstResponder()
    }
    override func rightRotateAfter(indexpaths: Set<IndexPath>) {
        NotificationCenter.default.post(name: NSNotification.Name(rawValue: "KMPDFViewRotatePage"), object: self.thumbnailView.document)
        
        self.km_becomeFirstResponder()
    }
    
    override func replaceAfter(of targetIndexs: IndexSet, with pages: [CPDFPage], at index: Int) {
        var indexpaths = Set<IndexPath>()
        var insertIndex = index
        for _ in pages {
            indexpaths.insert(IndexPath(item: insertIndex, section: 0))
            insertIndex += 1
        }
        self.thumbnailView.selectionIndexPaths = indexpaths
        self.dealPdfDocumentDidEditCallback(type: .replace)
    }
    
    override func insertBlankPageAfter(size: NSSize, at index: Int) {
        self.selectPages(indexs: IndexSet(integer: index))
        self.dealPdfDocumentDidEditCallback(type: .insert)
    }
    
    func listViewCurrentPageUpdateForDrag(indexs: IndexSet, toIndex: Int) {
        if (indexs.isEmpty) {
            return
        }
        // listView 当前页面 被拖拽
        if (indexs.contains(self._listViewCurrentIndex)) {
//            let idx = indexs.firstIndex(of: self._listViewCurrentIndex)
            var idx: Int = 0
            for index in indexs {
                if (index == self._listViewCurrentIndex) {
                    break
                }
                idx += 1
            }
            // 插入位置偏移量
            var toIndexOffset: Int = 0
            // 从后面往前删除
            for index in indexs.reversed() {
                let newPage = (self.listView?.document.page(at: UInt(index)))?.copy() as? CPDFPage
                if (newPage == nil) {
                    continue
                }

                if (index < toIndex) { /// 删除了插入位置前面的页面，需要改变 toIndex
                    toIndexOffset += 1
                }
            }
            if (indexs.last! < toIndex) { // 往后拖拽
                toIndexOffset -= 1
            }
            let insertIndex = max(0, toIndex-toIndexOffset)
            self._listViewCurrentIndex = insertIndex+idx
        } else {
            var forwardCnt = 0
            var nextCnt = 0
            for index in indexs {
                if (index > self._listViewCurrentIndex) {
                    nextCnt += 1
                } else {
                    forwardCnt += 1
                }
            }
            
            if (self._listViewCurrentIndex > toIndex) { // 插入到目标前面, 前面不管，只管后面的格式
                self._listViewCurrentIndex += nextCnt
            } else if (self._listViewCurrentIndex < toIndex) { // 插入到目标后面， 后面不管，只管前面的格式
                self._listViewCurrentIndex = max(0, self._listViewCurrentIndex - forwardCnt)
            } else { // 插入到目标位置 [跟插入到目标后面一样]
                self._listViewCurrentIndex = max(0, self._listViewCurrentIndex - forwardCnt)
            }
        }
    }
}

// MARK: - Analytics (埋点)

extension KMPDFEditViewController {
    func trackEvent(type: KMPageEditType) -> Void {
        if (type == .insert) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Insert", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .extract) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Extract", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .leftRotate || type == .rightRotate) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Rotate", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .replace) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Replace", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .split) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Split", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .reverse) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Reverse", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        } else if (type == .delete) {
            KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Delete", parameters: [
                KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
                KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
        }
    }
    
    func trackEvent_copy() -> Void {
        KMAnalytics.trackEvent(eventName: "Btn_SubTbr_Copy", parameters: [
            KMAnalytics.Parameter.categoryKey : KMAnalytics.Category.subTbr_PageEdit,
            KMAnalytics.Parameter.labelKey : KMAnalytics.Label.subTbr_Btn], platform: .AppCenter, appTarget: .all)
    }
}