using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Forms = System.Windows.Forms;
using System.Windows.Xps.Packaging;
using Office = Core.Mes.Client.Comm.Office;

namespace Core.StlMes.Client.Mcp.Control
{
    public partial class FrmDocViewer : Form
    {
        private string _fileName ="";
        private DocType _docType = DocType.Picture;

        private Core.Mes.Client.Comm.WPF.DocumentViewer documentViewer1;
        private System.Windows.Forms.Integration.ElementHost elementHost1;
        private PictureBox pictureBox1;

        public FrmDocViewer(string fileName)
        {
            InitializeComponent();
            _fileName = fileName;
            if (!string.IsNullOrEmpty(fileName))
            {
                string extensions = fileName.Substring(_fileName.LastIndexOf(".")).ToUpper();
                if (extensions.Contains("JPG") || extensions.Contains("BMP"))
                {
                    _docType = DocType.Picture;
                }
                else if(extensions.Contains("DOC"))
                {
                    _docType = DocType.Word;
                }
                else if (extensions.Contains("XPS"))
                {
                    _docType = DocType.XPS;
                }
                else if (extensions.Contains("PDF"))
                {
                    _docType = DocType.PDF;
                }
            }

            documentViewer1 = new Core.Mes.Client.Comm.WPF.DocumentViewer();
            elementHost1 = new System.Windows.Forms.Integration.ElementHost();
            this.elementHost1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.elementHost1.Location = new System.Drawing.Point(0, 0);
            this.elementHost1.Name = "elementHost1";
            this.elementHost1.Size = new System.Drawing.Size(552, 413);
            this.elementHost1.TabIndex = 5;
            this.elementHost1.Text = "elementHost1";
            this.elementHost1.Child = this.documentViewer1;

            pictureBox1 = new PictureBox();
            pictureBox1.Dock = DockStyle.Fill;
            pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;

            switch (_docType)
            {
                case DocType.Word:
                case DocType.XPS:
                    this.Controls.Add(elementHost1);
                    break;
                case DocType.Picture:
                    this.Controls.Add(pictureBox1);
                    break;
                case DocType.PDF:
                    break;
            }
        }

        private void FrmDocViewer_Load(object sender, EventArgs e)
        {
            ShowDoc();
        }

        private void ShowDoc()
        {
            if (!string.IsNullOrEmpty(_fileName))
            {
                switch (_docType)
                {
                    case DocType.Word:
                    case DocType.XPS:
                        XpsDocument document = null;
                        if (_docType == DocType.XPS)
                        {
                            //显示xps文档
                            document = new XpsDocument(_fileName, FileAccess.Read);
                            documentViewer1.Viewer.Document = document.GetFixedDocumentSequence();
                        }
                        else
                        {
                            //显示word文档
                            string tempPath = Forms.Application.StartupPath + @"\cache";//xps缓存文件路径
                            if (!Directory.Exists(tempPath))
                            {
                                Directory.CreateDirectory(tempPath);
                            }
                            //word先转换xps再显示
                            document = Office.DocumentViewerHelper.ConvertWordToXps(_fileName, tempPath + @"\tempDoc.xps");
                            documentViewer1.Viewer.Document = document.GetFixedDocumentSequence();

                        }
                        //关闭流
                        document.Close();
                        break;
                    case DocType.Picture:
                        pictureBox1.Image = Image.FromFile(_fileName);
                        break;
                }
            }
        }
    }

    public enum DocType
    {
        Picture = 0,
        Word = 1,
        PDF = 2,
        XPS = 3
    }
}