using ComPDFKit.PDFAnnotation;
using ComPDFKit.PDFDocument;
using ComPDFKitViewer;
using ComPDFKitViewer.AnnotEvent;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Office.Interop.Excel;
using Microsoft.Office.Interop.Word;
using Microsoft.Win32;
using PDF_Office.CustomControl;
using PDF_Office.EventAggregators;
using PDF_Office.Helper;
using PDF_Office.Model;
using PDF_Office.Properties;
using PDF_Office.ViewModels.BOTA;
using PDF_Office.ViewModels.PropertyPanel;
using PDF_Office.ViewModels.PropertyPanel.AnnotPanel;
using PDF_Office.Views.BOTA;
using PDF_Office.Views.PropertyPanel.AnnotPanel;
using PDFSettings;
using PDFSettings.Settings;
using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using Prism.Regions;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Forms;
using System.Windows.Input;
using System.Windows.Media;
using ContextMenu = System.Windows.Controls.ContextMenu;
using KeyEventArgs = System.Windows.Input.KeyEventArgs;
using MenuItem = System.Windows.Controls.MenuItem;

namespace PDF_Office.ViewModels.Tools
{
    public sealed partial class AnnotToolContentViewModel : BindableBase, INavigationAware
    {
        #region 初始化

        public AnnotToolContentViewModel(IRegionManager regionManager, IEventAggregator eventAggregator, IDialogService dialogService)
        {
            region = regionManager;
            events = eventAggregator;
            dialogs = dialogService;
            InitCommand();
            InitDefaultValue();
            InitToolDict();
            InitToolTipDict();
            InitPopMenu();
            SubscribeEvent();
        }

        //事件聚合器
        private void SubscribeEvent()
        {
            Unicode = App.mainWindowViewModel.SelectedItem.Unicode;
            events.GetEvent<FillAndSignEvent>().Subscribe(FromFillAndSign, e => e.AppUnicode == Unicode);
        }

        private void InitPopMenu()
        {
            InitSelectHightAnnotMenu();
            InitSelectFreeHandAnnotMenu();
            InitSelectFreeTextAnnotMenu();
            InitSelectStrickNoteAnnotMenu();
            InitSelectShapeAnnotMenu();
            InitSelectLinkAnnotMenu();
            InitSelectStampAnnotMenu();
            InitSelectMultiAnnotMenu();
        }

        private void InitCommand()
        {
            MyToolsCommand = new DelegateCommand<CustomIconToggleBtn>(BtnMyTools_Click);
            SetAddAnnotationCommand = new DelegateCommand<object>(AddAnnotation_Click);
            AddBookMarkCommand = new DelegateCommand(AddBookMark_Click);
            PropertyRegionName = Guid.NewGuid().ToString();
            HandCommand = new DelegateCommand<object>(Hand_Click);

            #region 注释 - 右键菜单

            //公共command
            AnnotDefaultValue_MenuCommand = new DelegateCommand<object>(AnnotDefaultValues_Menu);
            AnnotColorPalette_MenuCommand = new DelegateCommand<object>(AnnotColorPalette_Menu);
            AnnotAddNoteText_MenuCommand = new DelegateCommand<object>(AnnotAddNoteText_Menu);
            //高亮、下划线、删除
            HightAnnotCopyText_MenuCommand = new DelegateCommand<object>(HightAnnotCopyText_Menu);
            //手绘
            FreeHandLineStyle_MenuCommand = new DelegateCommand<object>(FreeHandLineStyle_Menu);
            //文本
            FreeTextFontFamily_MenuCommand = new DelegateCommand<object>(FreeTextFontFamily_Menu);
            FreeTextAglin_MenuCommand = new DelegateCommand<object>(FreeTextAglin_Menu);
            //便签
            StrikeNoteEditStrike_MenuCommand = new DelegateCommand<object>(StrikeNoteEditStrike_Menu);
            //形状
            ShapeLineStyle_MenuCommand = new DelegateCommand<object>(ShapeLineStyle_Menu);
            ShapeLineDirect_MenuCommand = new DelegateCommand<object>(ShapeLineDirect_Menu);
            //图章
            StampExportPicture_MenuCommand = new DelegateCommand<object>(StampExportPicture_Menu);
            //链接
            Link_MenuCommand = new DelegateCommand<object>(Link_Menu);

            #endregion 注释 - 右键菜单
        }

        private void Hand_Click(object obj)
        {
            HandToolIsCheckedEvent(BtnHandIsChecked);
            if (BtnHandIsChecked)
            {
                //其余注释工具 取消选中
                StrAnnotToolChecked = "";
                BtnLinkIsChecked = false;
                viewContentViewModel.SelectedPrpoertyPanel("PropertyPanelContent", null);
            }
        }

        private void HandToolIsCheckedEvent(bool isChecked)
        {
            if (isChecked == false)
            {
                //鼠标框选多选注释
                if (PDFViewer.MouseMode != MouseModes.AnnotCreate)
                {
                    PDFViewer.SetMouseMode(MouseModes.AnnotCreate);
                    var annotArgs = new SelectToolArgs();
                    PDFViewer.SetToolParam(annotArgs);
                }
                else
                {
                    PDFViewer.SetMouseMode(MouseModes.PanTool);
                }
            }
            else
            {
                //鼠标滚动页面
                PDFViewer.SetMouseMode(MouseModes.Scroll);
                PDFViewer.SetToolParam(new AnnotHandlerEventArgs());
            }
        }

        #endregion 初始化

        #region Command实现

        //点击注释工具
        private void BtnMyTools_Click(CustomIconToggleBtn annotBtn)
        {
            //不创建注释，属于注释模板
            bool isTemplateAnnot = false;
            bool isSnapshotEdit = false;
            AnnotHandlerEventArgs annotArgs = null;

            if (annotBtn.Name == "BtnShowAnnot")
            {
                PDFViewer.SetDrawAnnot((bool)annotBtn.IsChecked);
                return;
            }

            if (annotBtn.IsChecked == true)
            {
                if (BtnHandIsChecked)
                {
                    BtnHandIsChecked = false;
                }

                PDFViewer.ClearSelectAnnots();
                var tag = annotBtn.Tag.ToString();
                FindAnnotTypeKey(tag, ref annotArgs);

                if (tag == "SnapshotEdit")
                {
                    isSnapshotEdit = true;
                }
                else if (tag == "Signature" || tag == "Stamp")
                {
                    isTemplateAnnot = true;
                }

                if (tag != "Link")
                    BtnLinkIsChecked = false;
                else
                    StrAnnotToolChecked = "Link";

                if (annotArgs != null)
                {
                    annotArgs.Author = Settings.Default.AppProperties.Description.Author;
                    PDFViewer.SetMouseMode(MouseModes.AnnotCreate);
                    PDFViewer.SetToolParam(annotArgs);

                    if (tag == "Rect" || tag == "Circle" || tag == "Arrow" || tag == "Line")
                    {
                        PDFViewer.ToolManager.EnableClickCreate = true;
                        PDFViewer.ToolManager.ClickCreateWidth = 140;
                        PDFViewer.ToolManager.ClickCreateHeight = 140;
                    }
                    else
                    {
                        PDFViewer.ToolManager.EnableClickCreate = false;
                    }

                    #region 设计重新调整，阅读页空白处，右键菜单，添加链接需要显示，其他和pro mac一样的效果，不显示属性栏

                    //isRightMenuAddAnnot = false;

                    #endregion 设计重新调整，阅读页空白处，右键菜单，添加链接需要显示，其他和pro mac一样的效果，不显示属性栏
                }
            }
            else
            {
                propertyPanel.IsAddLink = false;
                propertyPanel.IsLocationLink = false;
                PDFViewer.ToolManager.EnableClickCreate = false;
            }

            //当不是注释模板，且无创建注释时，属性面板显示为空内容
            if (isTemplateAnnot == false && annotArgs == null)
            {
                PDFViewer.SetMouseMode(MouseModes.PanTool);
                viewContentViewModel.SelectedPrpoertyPanel("PropertyPanelContent", null);
            }
            else
            {
                if (isSnapshotEdit == true)
                {
                    ShowPropertyPanel(false);
                    isSnapshotEdit = false;
                }
                else
                {
                    ShowPropertyPanel((bool)annotBtn.IsChecked);
                }
            }
        }

        #endregion Command实现

        #region BOTA

        private AnnotationContentViewModel GetAnnotationContentViewModel(BOTAContentViewModel bOTAContentViewModel, out AnnotationContent annotation)
        {
            AnnotationContentViewModel viewModel = null;
            annotation = null;
            if (bOTAContentViewModel != null)
            {
                if (region.Regions.ContainsRegionWithName(bOTAContentViewModel.BOTAContentRegionName))
                {
                    var views = region.Regions[bOTAContentViewModel.BOTAContentRegionName].Views;
                    foreach (var item in views)
                    {
                        if (item is AnnotationContent annotation1)
                        {
                            annotation = annotation1;
                            viewModel = annotation1.DataContext as AnnotationContentViewModel;
                            break;
                        }
                    }
                }
            }
            return viewModel;
        }

        /// <summary>
        /// 判断Bota的TabItem是否已显示
        /// </summary>
        /// <param name="bOTAContentViewModel"></param>
        /// <param name="bOTAContent"></param>
        /// <param name="tabItemText"></param>
        /// <returns></returns>
        private bool IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, string tabItemText)
        {
            bool isTabItem = false;
            bOTAContentViewModel = null;
            bOTAContent = null;
            if (region.Regions.ContainsRegionWithName(viewContentViewModel.BOTARegionName))
            {
                var views = region.Regions[viewContentViewModel.BOTARegionName].Views;
                var model = views.FirstOrDefault(q => q is BOTAContent);
                if (model is BOTAContent bOTAContent1)
                {
                    bOTAContent = bOTAContent1;
                    bOTAContentViewModel = bOTAContent.DataContext as BOTAContentViewModel;
                    if (bOTAContentViewModel.CurrentBar == tabItemText)
                    {
                        isTabItem = true;
                    }
                }
                //foreach (var item in views)
                //{
                //    if (item is BOTAContent bOTAContent1)
                //    {
                //        bOTAContent = bOTAContent1;
                //        bOTAContentViewModel = bOTAContent.DataContext as BOTAContentViewModel;
                //        if (bOTAContentViewModel.CurrentBar == tabItemText)
                //        {
                //            isTabItem = true;

                //            break;
                //        }
                //    }
                //}
            }
            return isTabItem;
        }

        private void Select_Click(object sender, RoutedEventArgs e)
        {
            if (viewContentViewModel.OpenBOTA == false)
            {
                viewContentViewModel.OpenBOTA = true;
            }
            bool isBook = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemSearch");
            if (isBook == false)
            {
                bOTAContent.TabItemSearch.IsSelected = true;
            }
        }

        #endregion BOTA

        #region 阅读页右键菜单

        private void PageDisplay(ItemCollection items)
        {
            foreach (var item in items)
            {
                if (item is MenuItem menuItem)
                {
                    menuItem.IsCheckable = false;
                    menuItem.Click -= PageDisplay_Click;
                    menuItem.Click += PageDisplay_Click;
                }
            }
        }

        private void PageDisplay_Click(object sender, RoutedEventArgs e)
        {
            if (sender is MenuItem menuItem)
            {
                switch (menuItem.Tag.ToString())
                {
                    case "SingleView":
                        PDFViewer.ChangeViewMode(ViewMode.Single);
                        break;

                    case "SingleContinueView":
                        PDFViewer.ChangeViewMode(ViewMode.SingleContinuous);
                        break;

                    case "DoubleView":
                        PDFViewer.ChangeViewMode(ViewMode.Double);
                        break;

                    case "DoubleContinueView":
                        PDFViewer.ChangeViewMode(ViewMode.DoubleContinuous);
                        break;

                    case "BookMode":
                        PDFViewer.ChangeViewMode(ViewMode.Book);
                        break;
                }
            }
        }

        private void ViewZoom(ItemCollection items)
        {
            foreach (var item in items)
            {
                if (item is MenuItem menuItem)
                {
                    //switch (PDFViewer.ModeFit)
                    //{
                    //    case FitMode.FitWidth:
                    //        break;

                    //    case FitMode.FitHeight:
                    //        break;

                    //    case FitMode.FitSize:
                    //        break;

                    //    case FitMode.FitFree:
                    //        break;

                    //    default:
                    //        break;
                    //}
                    menuItem.IsCheckable = false;
                    menuItem.Click -= ViewZoom_Click;
                    menuItem.Click += ViewZoom_Click;
                }
            }
        }

        private void ViewZoom_Click(object sender, RoutedEventArgs e)
        {
            if (sender is MenuItem menuItem)
            {
                switch (menuItem.Tag.ToString())
                {
                    case "FitWidth":
                        PDFViewer.ChangeFitMode(FitMode.FitWidth);

                        break;

                    case "FitHeight":
                        PDFViewer.ChangeFitMode(FitMode.FitHeight);
                        break;

                    case "FitSize":
                        PDFViewer.ChangeFitMode(FitMode.FitSize);
                        break;

                    case "enlarge":
                        double newZoom = viewContentViewModel.CheckZoomLevel((PDFViewer.ZoomFactor + 0.01), true);
                        PDFViewer.Zoom(newZoom);
                        break;

                    case "narrow":
                        newZoom = viewContentViewModel.CheckZoomLevel((PDFViewer.ZoomFactor + -0.01), false);
                        PDFViewer.Zoom(newZoom);
                        break;
                }
            }
        }

        private void UnReadModel_Click(object sender, RoutedEventArgs e)
        {
            viewContentViewModel.UnReadModel();
        }

        private void ReadModel_Click(object sender, RoutedEventArgs e)
        {
            viewContentViewModel.RbtnReadMode();
        }

        private void SetToolMode(ItemCollection items)
        {
            foreach (var item in items)
            {
                if (item is MenuItem menuItem)
                {
                    menuItem.IsCheckable = false;
                    menuItem.Click -= ToolMode_Click;
                    menuItem.Click += ToolMode_Click;
                }
            }
        }

        private void ToolMode_Click(object sender, RoutedEventArgs e)
        {
            if (sender is MenuItem menuItem)
            {
                switch (menuItem.Tag.ToString())
                {
                    case "default":
                        HandToolIsCheckedEvent(false);
                        BtnHandIsChecked = false;
                        ShowPropertyPanel(false);
                        break;

                    case "roll":
                        HandToolIsCheckedEvent(true);
                        BtnHandIsChecked = true;
                        ShowPropertyPanel(false);
                        break;

                    case "content":
                        AnnotHandlerEventArgs annotHandler = GetSnapshotEdit();
                        BtnSelecttoolIsChecked = true;
                        if (annotHandler != null)
                        {
                            annotHandler.Author = Settings.Default.AppProperties.Description.Author;
                            PDFViewer.SetMouseMode(MouseModes.AnnotCreate);
                            PDFViewer.SetToolParam(annotHandler);
                            ShowPropertyPanel(false);
                        }

                        break;

                    default:
                        break;
                }
            }
        }

        private void DelBookMark_Click(object sender, RoutedEventArgs e)
        {
            if (viewContentViewModel.OpenBOTA == false)
            {
                viewContentViewModel.OpenBOTA = true;
            }
            bool isBook = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemBookMark");
            if (isBook == false)
            {
                bOTAContent.TabItemBookMark.IsSelected = true;
            }
            BookmarkContentViewModel bookmarkContentViewModel = GetBookmarkContentViewModel(bOTAContentViewModel, out BookmarkContent bookmark);

            int index = PDFViewer.CurrentIndex;
            //检测是否已存在相同数据
            CPDFBookmark list = PDFViewer.Document.GetBookmarkList().FirstOrDefault(q => q.PageIndex == index);
            if (bookmarkContentViewModel != null && bookmark != null && bOTAContent != null && list != null)
            {
                bookmarkContentViewModel.DeleteCommand.Execute(list);
                isAddBookMark = bookmarkContentViewModel.isAddBookMark;
            }

            //        bool isBook = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemBookMark");

            //if (isBook == false || viewContentViewModel.OpenBOTA == false)
            //{
            //    viewContentViewModel.OpenBOTA = true;
            //    bOTAContent.TabItemBookMark.IsSelected = true;
            //}
        }

        private void AddBookMark_Click()
        {
            if (viewContentViewModel.OpenBOTA == false)
            {
                viewContentViewModel.OpenBOTA = true;
            }
            bool isBook = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemBookMark");
            if (isBook == false)
            {
                bOTAContent.TabItemBookMark.IsSelected = true;
            }
            BookmarkContentViewModel bookmarkContentViewModel = GetBookmarkContentViewModel(bOTAContentViewModel, out BookmarkContent bookmark);

            if (bookmarkContentViewModel != null && bookmark != null && bOTAContent != null)
            {
                //bookmarkContentViewModel.AddBookmarkCommand.Execute(bookmark.BookMarkListView);
                bookmark.BtnAddBookmark_Click(null, null);
                isAddBookMark = bookmarkContentViewModel.isAddBookMark;
                return;
            }
        }

        private BookmarkContentViewModel GetBookmarkContentViewModel(BOTAContentViewModel bOTAContentViewModel, out BookmarkContent bookmark)
        {
            BookmarkContentViewModel viewModel = null;
            bookmark = null;
            if (bOTAContentViewModel != null)
            {
                if (region.Regions.ContainsRegionWithName(bOTAContentViewModel.BOTAContentRegionName))
                {
                    var views = region.Regions[bOTAContentViewModel.BOTAContentRegionName].Views;
                    foreach (var item in views)
                    {
                        if (item is BookmarkContent bookmark1)
                        {
                            bookmark = bookmark1;
                            viewModel = bookmark1.DataContext as BookmarkContentViewModel;
                            break;
                        }
                    }
                }
            }
            return viewModel;
        }

        private OutLineControlViewModel GetOutLineControlViewModel(BOTAContentViewModel bOTAContentViewModel, out OutLineControl outLineControl)
        {
            OutLineControlViewModel viewModel = null;
            outLineControl = null;
            if (bOTAContentViewModel != null)
            {
                if (region.Regions.ContainsRegionWithName(bOTAContentViewModel.BOTAContentRegionName))
                {
                    var views = region.Regions[bOTAContentViewModel.BOTAContentRegionName].Views;
                    foreach (var item in views)
                    {
                        if (item is OutLineControl outLineControl1)
                        {
                            outLineControl = outLineControl1;
                            viewModel = outLineControl1.DataContext as OutLineControlViewModel;
                            break;
                        }
                    }
                }
            }
            return viewModel;
        }

        private void DisplayAnnot_Click(object sender, RoutedEventArgs e)
        {
            PDFViewer.SetDrawAnnot(true);
            BtnShowAnnotIsChecked = true;

            bool isTabItemAnnotation = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemAnnotation");

            if (viewContentViewModel.OpenBOTA == true && isTabItemAnnotation == true)
            {
                AnnotationContentViewModel viewModel = GetAnnotationContentViewModel(bOTAContentViewModel, out AnnotationContent annotation);
                viewModel.DisplayAnnot();
            }
        }

        private void HiddenAnnot_Click(object sender, RoutedEventArgs e)
        {
            PDFViewer.SetDrawAnnot(false);
            BtnShowAnnotIsChecked = false;

            bool isTabItemAnnotation = IsBOTATabItemShow(out BOTAContentViewModel bOTAContentViewModel, out BOTAContent bOTAContent, "TabItemAnnotation");

            if (viewContentViewModel.OpenBOTA == true && isTabItemAnnotation == true)
            {
                AnnotationContentViewModel viewModel = GetAnnotationContentViewModel(bOTAContentViewModel, out AnnotationContent annotation);
                viewModel.HiddenAnnot();
            }
        }

        private void SetAddAnnotation(ItemCollection items)
        {
            foreach (var item in items)
            {
                if (item is MenuItem menuItem)
                {
                    string str = menuItem.Tag.ToString();
                    if (str == AddAnnotType.AnnotLink.ToString()
                    || str == AddAnnotType.AnnotStamp.ToString()
                    || str == AddAnnotType.AnnotAutograph.ToString()
                    )
                    {
                        InBookModeSetIsEnabled(menuItem);
                    }
                    menuItem.CommandParameter = item;
                    menuItem.Command = SetAddAnnotationCommand;
                }
            }
        }

        private void AddLink_Click(object sender, RoutedEventArgs e)
        {
            var args = PDFViewer.ToolManager.CurrentAnnotArgs;
            BtnLinkIsChecked = true;
        }

        #endregion 阅读页右键菜单

        #region 快捷键

        private void ShortCut_KeyDown(object sender, KeyEventArgs e)
        {
            if (KeyEventsHelper.IsSingleKey(Key.Escape))
            {
                BtnHandIsChecked = true;
                PDFViewer.SetMouseMode(MouseModes.Scroll);
                PDFViewer.ClearSelectAnnots();
                StrAnnotToolChecked = "";
                ShowPropertyPanel(false);
            }
            else if (KeyEventsHelper.IsModifierKey(ModifierKeys.Shift, Key.None))
            {
                //按住Shift等比缩放
            }

            AnnotToolCtrlAltKey();
        }

        /// <summary>
        /// 按下Ctrl + Alt + 序列键，响应注释工具
        /// </summary>
        private void AnnotToolCtrlAltKey()
        {
            var tuple = GetCtrlAltKey();
            if (tuple != null)
            {
                if (tuple.Item1 == Key.L)
                    BtnLinkIsChecked = false;

                AnnotHandlerEventArgs annotArgs = null;
                StrAnnotToolChecked = tuple.Item2;
                FindAnnotTypeKey(tuple.Item2, ref annotArgs);
                if (annotArgs != null)
                {
                    annotArgs.Author = Settings.Default.AppProperties.Description.Author;
                    PDFViewer.SetMouseMode(MouseModes.AnnotCreate);
                    PDFViewer.SetToolParam(annotArgs);
                    PDFViewer.ToolManager.EnableClickCreate = false;
                }
            }
        }

        private Tuple<Key, string> GetCtrlAltKey()
        {
            Dictionary<Key, bool> AnnotToolDir = new Dictionary<Key, bool>();
            AnnotToolDir.Add(Key.H, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.H));
            AnnotToolDir.Add(Key.U, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.U));
            AnnotToolDir.Add(Key.S, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.S));
            AnnotToolDir.Add(Key.P, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.P));
            AnnotToolDir.Add(Key.E, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.E));
            AnnotToolDir.Add(Key.T, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.T));
            AnnotToolDir.Add(Key.N, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.N));
            AnnotToolDir.Add(Key.R, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.R));
            AnnotToolDir.Add(Key.O, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.O));
            AnnotToolDir.Add(Key.A, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.A));
            AnnotToolDir.Add(Key.L, KeyEventsHelper.IsModifierKey(ModifierKeys.Control | ModifierKeys.Alt, Key.L));

            Key key = Key.None;
            foreach (var item in AnnotToolDir.Keys)
            {
                if (AnnotToolDir[item] == true)
                {
                    key = item;
                    break;
                }
            }

            if (key == Key.None)
                return null;

            var tag = "";
            if (key == Key.H || key == Key.U || key == Key.S)
            {
                var str = PDFViewer.GetSelectedText();
                if (string.IsNullOrEmpty(str) == false)
                {
                    if (key == Key.H)
                        tag = "HighLight";
                    else if (key == Key.U)
                        tag = "UnderLine";
                    else if (key == Key.S)
                        tag = "Strikeout";
                }
                else
                {
                    return null;
                }
            }
            else
            {
                if (AnnotToolDir[Key.P])
                    tag = "Freehand";
                else if (AnnotToolDir[Key.T])
                    tag = "Freetext";
                else if (AnnotToolDir[Key.N])
                    tag = "StickyNote";
                else if (AnnotToolDir[Key.R])
                    tag = "Rect";
                else if (AnnotToolDir[Key.O])
                    tag = "Circle";
                else if (AnnotToolDir[Key.A])
                    tag = "Arrow";
                else if (AnnotToolDir[Key.L])
                    tag = "Line";
            }

            if (tag == "")
                return null;

            return new Tuple<Key, string>(key, tag);
        }

        #endregion 快捷键

        #region Navigation

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
            StrAnnotToolChecked = "";
            UnBindingPDFViewerHandler();
            UnBindingEvent();
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);

            if (viewContentViewModel != null)
            {
                OpenFileInfo = viewContentViewModel.OpenFileInfo;
            }
            BindingPDFViewerHandler();
            BindingEvent();
            LoaedStickyNotePopup();
            BtnHandIsChecked = (PDFViewer.MouseMode == MouseModes.Scroll ? true : false);
        }

        #endregion Navigation
    }
}