Form1.cs

/*
 * Recurse, an ultra-lightweight and simplistic text editor
 * Copyright (C) 2022 REMCodes
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 * USA
 * 
 * To contact REMCodes, please email "ContactREMCodes@gmail.com"
*/

namespace Recurse
{
    public partial class Recurse : Form
    {
        private string FileContent
        {
            get
            {
                return _fileContent;
            }
            set
            {
                _fileContent = value;
                TextArea.Text = _fileContent;
            }
        }
        private string _fileContent = "";
        private string prefix = "";
        private string path = Properties.Settings.Default.LastFile;

        public Recurse()
        {
            InitializeComponent();
            OpenFileDialog.RestoreDirectory = true;
            SaveFileDialog.RestoreDirectory = true;
            KeyPreview = true;
        }

        private void TextArea_TextChanged(object sender, EventArgs e)
        {
            FileContent = TextArea.Text;
            UpdateFileName();
        }

        private void Open()
        {
            OpenFileDialog.ShowDialog(this);
        }

        private void Save()
        {
            if (path != "Untitled")
            {
                File.WriteAllText(path, FileContent);
                UpdateFileName();
            }
            else
            {
                SaveFileDialog.ShowDialog(this);
            }
        }

        private void UpdateFileName()
        {
            try
            {
                if (path == "Untitled")
                {
                    if (FileContent == String.Empty)
                    {
                        prefix = "";
                    }
                    else
                    {
                        prefix = "*";
                    }
                }
                else
                {
                    if (FileContent == File.ReadAllText(path))
                    {
                        prefix = "";
                    }
                    else
                    {
                        prefix = "*";
                    }
                }
            }
            catch
            {
                prefix = "*";
            }
            Text = "Recurse | " + path + prefix;
            string[] name = path.Split(new char[] { '\\', '/' });
            FileName.Text = prefix + name[name.Length-1];
        }

        private void Recurse_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.Control && e.KeyCode == Keys.O)
            {
                Open();
            }
            else if (e.Control && e.Shift && e.KeyCode == Keys.S)
            {
                SaveFileDialog.ShowDialog(this);
            }
            else if(e.Control && e.KeyCode == Keys.S)
            {
                Save();
            } else if(e.Control && e.KeyCode == Keys.Q)
            {
                if (MessageBox.Show("Are you sure you want to exit?", "Confirm Exit", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    Environment.Exit(0);
                }
            } else if (e.Control && e.KeyCode == Keys.H)
            {
                TextArea.ReadOnly = true;
                About about = new About();
                about.ShowDialog();
                TextArea.ReadOnly = false;
            } else if (e.Control && e.Shift && e.KeyCode == Keys.X)
            {
                CloseFile();
            }
        }

        private void OpenFileDialog_FileOk(object sender, System.ComponentModel.CancelEventArgs e)
        {
            var filePath = OpenFileDialog.FileName;

            var fileStream = OpenFileDialog.OpenFile();

            path = filePath;

            using (StreamReader reader = new StreamReader(fileStream))
            {
                FileContent = reader.ReadToEnd();
                UpdateFileName();
            }
        }

        private void SaveFileDialog_FileOk(object sender, System.ComponentModel.CancelEventArgs e)
        {
            path = SaveFileDialog.FileName;

            File.WriteAllText(SaveFileDialog.FileName, FileContent);
            UpdateFileName();
        }

        private void Recurse_FormClosed(object sender, FormClosedEventArgs e)
        {
            Properties.Settings.Default.LastFile = path;
            Properties.Settings.Default.Save();
        }

        private void Recurse_Load(object sender, EventArgs e)
        {
            if (path != "Untitled")
            {
                StreamReader reader = new StreamReader(path);
                FileContent = reader.ReadToEnd();
                UpdateFileName();
            }
        }

        private void CloseFile()
        {
            if ((path == "Untitled" && FileContent != "") | (path != "Untitled" && FileContent != File.ReadAllText(path))) 
            { 
                DialogResult result = MessageBox.Show("Do you want to save before closing?", "Save before closing?", MessageBoxButtons.YesNoCancel);

                if (result == DialogResult.Cancel)
                {
                    return;
                }

                else if (result == DialogResult.Yes)
                {
                    Save();
                }
            }

            path = "Untitled";
            UpdateFileName();
            FileContent = "";
        }

        private void Recurse_FormClosing(object sender, FormClosingEventArgs e)
        {
            if ((path == "Untitled" && FileContent != "") | (path != "Untitled" && FileContent != File.ReadAllText(path)))
            {
                DialogResult result = MessageBox.Show("Do you want to save before closing?", "Save before closing?", MessageBoxButtons.YesNoCancel);
                if (result == DialogResult.Cancel)
                {
                    e.Cancel = true;
                }

                else if (result == DialogResult.Yes)
                {
                    Save();
                }
            }
        }
    }
}