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

using ComPDFKit.PDFDocument;
using ComPDFKitViewer.PdfViewer;
using Microsoft.Office.Interop.Word;
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.Diagnostics;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Windows;
using System.Threading.Tasks;
using static PDF_Office.Model.Dialog.ToolsDialogs.SaftyDialogs.DeleteSafetySettintgsModel;
using Task = System.Threading.Tasks.Task;

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

        private ViewContentViewModel viewContentViewModel;

        public IDialogService dialogs;

        public IEventAggregator eventAggregator;

        private IntPtr compressingIntpr = IntPtr.Zero;

        private CPDFDocument.GetPageIndexDelegate indexDelegate = null;
        private CPDFDocument tempDocument;

        public string unicode = null;

        /// <summary>
        /// 是否是第一次加载
        /// </summary>
        private bool isFirstLoad = true;

        private string _pageIndex = "0";

        /// <value>
        /// 当前页
        /// </value>
        public string PageIndex
        {
            get { return _pageIndex; }
            set
            {
                SetProperty(ref _pageIndex, value);
                App.mainWindowViewModel.Value = int.Parse(PageIndex);
            }
        }

        private string _pageNumber = "";
        /// <value>
        /// 总页数
        /// </value>
        public string PageNumber
        {
            get { return _pageNumber; }
            set
            {
                SetProperty(ref _pageNumber, value);
                App.mainWindowViewModel.MaxValue = int.Parse(PageNumber);
            }
        }
        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 => {

                OnOpened((Prism.Services.Dialogs.DialogResult)e);
            });
        }

        private int GetIndex(int pageindex)
        {
            PageIndex = (pageindex+1).ToString();
            App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Visible;
            if (PageIndex == PageNumber) { App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Collapsed;}
            return 0;
        }
        private void CompressClear()
        {
            tempDocument.CompressFile_Cancel(compressingIntpr);
            App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Collapsed;
        }
        public async void OnOpened(Prism.Services.Dialogs.DialogResult e)
        {
            if (e.Result == Prism.Services.Dialogs.ButtonResult.Cancel) { return; }
            CPDFDocument doc = null;
            string filepath = "";
            string password = "";
            int compressquality = 45;
           doc=e.Parameters.GetValue<CPDFDocument>(ParameterNames.PDFDocument);
            filepath= e.Parameters.GetValue<string>(ParameterNames.FilePath);
            password = e.Parameters.GetValue<string>(ParameterNames.PassWord);
            compressquality = e.Parameters.GetValue<int>("compressDialogModel.CompressQuality");
            if (doc != null)
            {
                PageNumber = doc.PageCount.ToString();
                CPDFDocument document = CPDFDocument.InitWithFilePath(doc.FilePath);
                document.UnlockWithPassword(password);
                indexDelegate += GetIndex;
                compressingIntpr = document.CompressFile_Init(compressquality, indexDelegate);
                //GC.KeepAlive(indexDelegate);
                tempDocument = document;
                Trace.WriteLine("compressDialogModel.CompressQuality" + compressquality);
                App.mainWindowViewModel.ProcessCloseAction = CompressClear;
                await Task.Run<bool>(() => { return document.CompressFile_Start(compressingIntpr, filepath); });
                CommonHelper.ShowFileBrowser(filepath);
                document.Release();
            }
        }
        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;
            }
        }
    }
}