Work on document manager

RainmeterEditor/Documents/Text/TextDocument.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using RainmeterEditor.Model;
+
+namespace RainmeterEditor.Documents.Text
+{
+    public class TextDocument : IDocument
+    {
+        public string Name
+        {
+            get
+            {
+                return Path.GetFileName(FilePath);
+            }
+        }
+
+        public string FilePath
+        {
+            get; set;
+        }
+
+        public string Text
+        {
+            get; set;
+        }
+
+        public TextDocument()
+        {
+            Text = String.Empty;
+        }
+    }
+}

RainmeterEditor/Documents/Text/TextEditor.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using RainmeterEditor.Model;
+
+namespace RainmeterEditor.Documents.Text
+{
+    public class TextEditor : IDocumentEditor
+    {
+        private TextDocument _document;
+        private TextEditorControl _control;
+
+        public TextEditor(TextDocument document)
+        {
+            _document = document;
+            _control = new TextEditorControl(document);
+        }
+
+        public override IDocument Document { get { return _document; } }
+
+        public override string Title { get { return _document.Name; } }
+
+        public override System.Windows.UIElement EditorUI { get { return _control; } }
+    }
+}

RainmeterEditor/Documents/Text/TextEditorControl.xaml

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+<UserControl x:Class="RainmeterEditor.Documents.Text.TextEditorControl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             mc:Ignorable="d" 
+             d:DesignHeight="300" d:DesignWidth="300">
+    <Grid>
+        <TextBox Name="text" AcceptsReturn="True" />
+    </Grid>
+</UserControl>

RainmeterEditor/Documents/Text/TextEditorControl.xaml.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.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace RainmeterEditor.Documents.Text
+{
+    /// <summary>
+    /// Interaction logic for TextEditorControl.xaml
+    /// </summary>
+    public partial class TextEditorControl : UserControl
+    {
+        private TextDocument _document;
+
+        public TextEditorControl(TextDocument document)
+        {
+            InitializeComponent();
+
+            _document = document;
+            text.Text = document.Text;
+        }
+    }
+}

RainmeterEditor/Documents/Text/TextEditorFactory.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using RainmeterEditor.Business;
+using RainmeterEditor.Model;
+
+namespace RainmeterEditor.Documents.Text
+{
+    public class TextEditorFactory : IDocumentEditorFactory
+    {
+        private TextStorage _storage = new TextStorage();
+
+        /// <inheritdoc />
+        public string EditorName
+        {
+            get { return Resources.Strings.DocumentEditor_Text_Name; }
+        }
+
+        /// <inheritdoc />
+        public IEnumerable<DocumentFormat> CreateDocumentFormats
+        {
+            get 
+            {
+                yield return new DocumentFormat()
+                {
+                    Name = Resources.Strings.DocumentFormat_TextFile_Name,
+                    Category = Resources.Strings.Category_Utility,
+                    DefaultExtension = ".txt",
+                    Description = Resources.Strings.DocumentFormat_TextFile_Description,
+                    Icon = new System.Windows.Media.Imaging.BitmapImage(new Uri("/Resources/Icons/text-x-generic-32.png", UriKind.RelativeOrAbsolute)),
+                    Factory = this
+                };
+            }
+        }
+
+
+        public IDocumentEditor CreateEditor(IDocument document)
+        {
+            TextDocument textDocument = document as TextDocument;
+
+            if (textDocument == null)
+                throw new ArgumentException("Cannot edit provided document.");
+
+            return new TextEditor(textDocument);
+        }
+
+        public IDocumentStorage Storage { get { return _storage; } }
+
+        public IDocument CreateDocument(DocumentFormat format, string path)
+        {
+            var document = new TextDocument();
+            document.FilePath = path;
+
+            return document;
+        }
+    }
+}

RainmeterEditor/Documents/Text/TextStorage.cs

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+using System;
+using System.IO;
+using RainmeterEditor.Model;
+
+namespace RainmeterEditor.Documents.Text
+{
+    /// <summary>
+    /// Storage for text files
+    /// </summary>
+    public class TextStorage : IDocumentStorage
+    {
+        /// <inheritdoc />
+        IDocument IDocumentStorage.Read(string path)
+        {
+            TextDocument document = new TextDocument();
+            document.FilePath = path;
+            document.Text = File.ReadAllText(path);
+
+            return document;
+        }
+
+        /// <inheritdoc />
+        public void Write(string path, IDocument document)
+        {
+            TextDocument textDocument = document as TextDocument;
+
+            if (textDocument == null)
+                throw new ArgumentException("Provided document is not supported by this storage.");
+
+            File.WriteAllText(path, textDocument.Text);
+        }
+
+        /// <inheritdoc />
+        public bool CanRead(string path)
+        {
+            // Open the file
+            FileStream file = File.OpenRead(path);
+
+            // Read a small chunk (1kb should be enough)
+            byte[] buffer = new byte[1024];
+            int read = file.Read(buffer, 0, buffer.Length);
+
+            // Close file
+            file.Close();
+
+            // Find 4 consecutive zero bytes
+            int cnt = 0;
+            for (int i = 0; i < read; i++)
+            {
+                // Count zero bytes
+                if (buffer[i] == 0)
+                    ++cnt;
+                else cnt = 0;
+
+                // Found > 4? Most likely binary file
+                if (cnt >= 4)
+                    return false;
+            }
+
+            // Not found, probably text file
+            return true;
+        }
+    }
+}