PDFOffice_Windows_exe/PDF Office/Model/Dialog/ToolsDialogs/CompressDialogModel/CompressDialogModel.cs

using ComPDFKit.PDFDocument;
using Microsoft.Office.Interop.Word;
using PDF_Office.Helper;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Task = System.Threading.Tasks.Task;

namespace PDF_Office.Model.Dialog.ToolsDialogs
{
    public class CompressDialogModel
    {
        CPDFDocument tempDocument = null;
        IntPtr compressingIntpr = IntPtr.Zero;
        public enum EnumQualityLevel {  
        StatusLarge=100,
        StatusStandard=80,
        StatusDefault=40,
        StatusLittle =40,
        StatusMicro=10
        }

        public EnumQualityLevel CompressQuality { get; set; }

        public static string PageIndex { get; set; }

        public void CompressClear()
        {
            tempDocument.CompressFile_Cancel(compressingIntpr);
            App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Collapsed;
        }
        private int GetIndex(int pageindex)
        {
            App.mainWindowViewModel.Value = (pageindex + 1);
           
            if (App.mainWindowViewModel.Value == App.mainWindowViewModel.MaxValue) { App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Collapsed; }
            return 0;
        }

        public async void OnOpened(Prism.Services.Dialogs.DialogResult e)
        {
            if (e.Result == Prism.Services.Dialogs.ButtonResult.Cancel||e.Result==Prism.Services.Dialogs.ButtonResult.None) { return; }
            CPDFDocument doc = null;
            CPDFDocument.GetPageIndexDelegate indexDelegate = 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)
            {
                App.mainWindowViewModel.Value = 0;
                App.mainWindowViewModel.ProgressTitle = "Compressing";
                App.mainWindowViewModel.IsProcessVisible = System.Windows.Visibility.Visible;
                App.mainWindowViewModel.MaxValue = doc.PageCount;
                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;
                if (await Task.Run<bool>(() => { return document.CompressFile_Start(compressingIntpr, filepath); })) { CommonHelper.ShowFileBrowser(filepath); }
                
                document.Release();
            }
        }
    }
    
}