crosslangdevstudio/ViewModels/FileEditorViewModel.cs

using System;
using System.Collections.ObjectModel;
using System.IO;
using System.Threading.Tasks;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Platform.Storage;
using AvaloniaEdit;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using CrossLangDevStudio.Messages;
using CrossLangDevStudio.Views;
using AvaloniaEdit.CodeCompletion;
using AvaloniaEdit.Document;
using AvaloniaEdit.Editing;
using AvaloniaEdit.Folding;
using AvaloniaEdit.Rendering;
using TextMateSharp.Grammars;
using AvaloniaEdit.TextMate;
using Avalonia.Input;
using System.Collections.Generic;
using Avalonia.Media;
namespace CrossLangDevStudio.ViewModels;

public partial class FileEditorViewModel : ViewModelBase, ISavable
{
    TabItemViewModel tab;
    public string FilePath { get; }
    bool _modified = false;
    public bool Modified
    {
        get => _modified;
        set
        {
            _modified = value;

            if (value)
            {
                tab.Header = $"{Path.GetFileName(FilePath)}*";
            }
            else
            {
                tab.Header = Path.GetFileName(FilePath);
            }
        }
    }



    TextEditor textEdit = new TextEditor();

    public TextEditor TextEditor => textEdit;



    public FileEditorViewModel(string path, TabItemViewModel tab)
    {
        this.tab = tab;
        FilePath = path;
        textEdit.ShowLineNumbers = true;
        textEdit.FontSize = 24;
        string ext = Path.GetExtension(FilePath);
        if (ext == ".tcross")
        {
            ext = ".go";
        }
        {

            var _registryOptions = new RegistryOptions(ThemeName.Dark);

            var _textMateInstallation = textEdit.InstallTextMate(_registryOptions);

            //definition.



            //Here we are getting the language by the extension and right after that we are initializing grammar with this language.
            //And that's all 😀, you are ready to use AvaloniaEdit with syntax highlighting!
            try
            {
                //AssetLoader.Open(new Uri("avares://CrossLangDevStudio/Assets/crosslang.png")

                _textMateInstallation.SetGrammar(_registryOptions.GetScopeByLanguageId(_registryOptions.GetLanguageByExtension(ext).Id));
            }
            catch (Exception)
            {

            }
        }


        textEdit.Text = File.ReadAllText(path);
        textEdit.TextChanged += (sender, e) =>
        {
            Modified = true;
        };
    }


    public void Save()
    {

        File.WriteAllText(FilePath, textEdit.Text);
        Modified = false;

    }

    public void SaveRecovery(string path)
    {

        File.WriteAllText(path, textEdit.Text);


    }
}