PDFOffice_Windows_exe/PDF Office/ViewModels/Tools/ToolsBarContentViewModel.cs

using ComPDFKitViewer.PdfViewer;
using PDF_Office.CustomControl;
using PDF_Office.EventAggregators;
using PDF_Office.Helper;
using PDF_Office.Model;
using PDF_Office.Model.Dialog.ToolsDialogs.SaftyDialogs;
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.Security.Cryptography.X509Certificates;
using System.Windows;
using static PDF_Office.Model.Dialog.ToolsDialogs.SaftyDialogs.DeleteSafetySettintgsModel;

namespace PDF_Office.ViewModels.Tools
{
    public class ToolsBarContentViewModel : BindableBase, INavigationAware
    {
        private CPDFViewer PDFViewer;

        private ViewContentViewModel viewContentViewModel;

        public IDialogService dialogs;

        public IEventAggregator eventAggregator;

        public string unicode = null;

        /// <summary>
        /// 是否是第一次加载
        /// </summary>
        private bool isFirstLoad = true;
        public DelegateCommand CompressCommand { get; set; }
        public DelegateCommand MergeCommand { get; set; }
        public DelegateCommand SetPasswordCommand { get; set; }
        public DelegateCommand CancelPasswordCommand { get; set; }
        public DelegateCommand<object> SetEditToolsCommand { get; set; }
        public DelegateCommand SetWatermarkCommand { get; set; }

        public ToolsBarContentViewModel(IDialogService dialogService, IEventAggregator eventAggregator)
        {
            dialogs = dialogService;
            this.eventAggregator = eventAggregator;
            unicode = App.mainWindowViewModel.SelectedItem.Unicode;
            CompressCommand = new DelegateCommand(OpenCompressDialog);
            MergeCommand = new DelegateCommand(MergeDialog);
            SetPasswordCommand = new DelegateCommand(OpenSetPasswordDialog);
            CancelPasswordCommand = new DelegateCommand(OpenCancelPasswordDialog);
            SetEditToolsCommand = new DelegateCommand<object>(SetEditTools);
        }

        private void SetEditTools(object e)
        {
            var args = e as System.Windows.Controls.Button;
            if (args != null)
            {
                this.eventAggregator.GetEvent<EnterSelectedEditToolEvent>().Publish(new StringWithUnicode() { Unicode = unicode, EditToolsContentName = args.Name });
            }
        }


        private void OpenCompressDialog()
        {
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFViewer, PDFViewer);
            dialogs.ShowDialog(DialogNames.CompressDialog, value, e => { });
        }
        private void MergeDialog()
        {
            DialogParameters value = new DialogParameters();
            value.Add(ParameterNames.PDFViewer, PDFViewer);
            dialogs.ShowDialog(DialogNames.MergeDialog, value, e => { });
        }

        private void OpenSetPasswordDialog()
        {
            VerifyPasswordResult result = SecurityHelper.VerifyPasswordForSelectedPermissions(PDFViewer.Document, EnumPermissionsSet.StatusAllowsPrinting|EnumPermissionsSet.StatusAllowsHighQualityPrinting, dialogs);
            if (result.IsDiscryptied)
            {
                if (result.Password != null)
                {
                    string filePath = PDFViewer.Document.FilePath;
                    PDFViewer.Document.Release();
                    PDFViewer.InitDocument(filePath);
                    PDFViewer.Document.UnlockWithPassword(result.Password);
                }
                DialogParameters value = new DialogParameters();
                value.Add(ParameterNames.PDFDocument, PDFViewer.Document);
                dialogs.ShowDialog(DialogNames.SetPasswordDialog, value, e => { });
            }
        }

        private void OpenCancelPasswordDialog()
        {
            if (!PDFViewer.Document.IsEncrypted)
            {
                MessageBoxEx.Show("No security settings available ");
            }
            else
            {
                VerifyPasswordResult result = SecurityHelper.VerifyPasswordByPasswordKind(PDFViewer.Document, EnumPasswordKind.StatusPermissionsPassword, dialogs);
                if (result.IsDiscryptied)
                {
                    if (result.Password != null)
                    {
                        string filePath = PDFViewer.Document.FilePath;
                        PDFViewer.Document.Release();
                        PDFViewer.InitDocument(filePath);
                        PDFViewer.Document.UnlockWithPassword(result.Password);
                    }
                    DialogParameters value = new DialogParameters();
                    value.Add(ParameterNames.PDFDocument, PDFViewer.Document);
                    dialogs.ShowDialog(DialogNames.DeleteSafetySettingsDialog, value, e => { });
                }
            }
        }

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

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
            navigationContext.Parameters.TryGetValue<ViewContentViewModel>(ParameterNames.ViewContentViewModel, out viewContentViewModel);
            navigationContext.Parameters.TryGetValue<CPDFViewer>(ParameterNames.PDFViewer, out PDFViewer);
            if (PDFViewer != null)
            {
                isFirstLoad = false;
            }
        }
    }
}