EditorTab.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.IO;

namespace SeciControls
{
    class EditTab : TabItem
    {
        private TextBox _textbox;
        private String _filename = "";
        private String _shortfilename = "";
        private DateTime _lastmodified;

        public String Filename { get { return _filename; } set { _filename = value; } }

        public EditTab(String filename)
        {
            setFilename(filename);

            _textbox = new TextBox();
            String text = "";
            loadFile(filename, ref text);
            _textbox.Text = text;
            _textbox.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
            _textbox.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;
            _textbox.AcceptsReturn = true;
            _textbox.AcceptsTab = true;
            _textbox.TextChanged += new TextChangedEventHandler(_textbox_TextChanged);

            this.AddChild(_textbox);
        }

        public void ReloadFile()
        {
            String text = "";
            loadFile(_filename, ref text);
            _textbox.Text = text;
            setFilename(_filename);
        }

        private Boolean loadFile(string filename, ref String text)
        {
            try
            {
                FileInfo fi = new FileInfo(filename);

                if (fi.Exists)
                {
                    getModifiedTime(filename);

                    using (StreamReader sr = new StreamReader(filename))
                    {
                        text = sr.ReadToEnd();
                    }

                    return true;
                }
                else
                {
                    text = "Could not find file: " + filename;
                    return false;
                }
            }
            catch
            {
                text = "Could not load file: " + filename;
                return false;
            }
        }

        private void getModifiedTime(string filename)
        {
            FileInfo fi = new FileInfo(filename);
            _lastmodified = fi.LastWriteTime;
        }

        public void SaveText(string filename)
        {
            try
            {
                using (StreamWriter sw = new StreamWriter(filename, false))
                {
                    sw.Write(_textbox.Text);
                    setFilename(filename);
                    getModifiedTime(filename);
                }
            }
            catch
            {
                //log this
            }
        }

        private void setFilename(string filename)
        {
            _filename = filename;
            String[] filepath = filename.Split('\\');
            _shortfilename = filepath[filepath.Length - 1];
            this.Header = _shortfilename;
        }

        private void _textbox_TextChanged(object sender, TextChangedEventArgs e)
        {
            this.Header = _shortfilename + " *";
        }
    }
}