src/WpfEditor/TextEditorControl.cs

using Echodict;
using Microsoft.Win32;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using OpenCvSharp;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Printing;
using System.Runtime.ConstrainedExecution;
using System.Runtime.Serialization.Formatters.Binary;
using System.Security.Cryptography;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Media.Media3D;
using System.Windows.Media.TextFormatting;
using System.Windows.Shapes;
using static System.Net.Mime.MediaTypeNames;
using Path = System.IO.Path;
using Point = System.Windows.Point;
using Rect = System.Windows.Rect;
using Size = System.Windows.Size;
using Window = System.Windows.Window;

namespace WpfEditor
{
    public class TextEditorControl : Control
    {
        private Window _imageWindow = null;
        private bool _isCut = false;
        public EditorMode _mode = EditorMode.ImageOCR; // 默认模式为图片OCR

        public JObject _jsn_OpenImg;  // for 校对
        public string _md5_OpenImg;
        public Dictionary<string, string> _dic_deleted_char = new Dictionary<string, string>();  // 被删除的字符存它的 guid，保存的时侯标记它逻辑删除

        public string _pthimg; // 当前打开的图片路径
        
        // 添加MainWindow引用
        public MainWindow _mainWindow;

        public static BitmapSource MatToBitmapSource(Mat mat)
        {
            // Detect pixel format (BGR24 for color, Gray8 for grayscale)
            var pixelFormat = mat.Channels() == 1 ? PixelFormats.Gray8 : PixelFormats.Bgr24;

            // Create BitmapSource with stride = mat.Step (handles 4-byte alignment)
            return BitmapSource.Create(
                mat.Width, mat.Height,
                96, 96, // Default DPI
                pixelFormat,
                null,
                mat.Data,
                (int)mat.Step() * mat.Height, // Buffer size
                (int)mat.Step() // Stride (critical for alignment)
            );
        }

        public void ShowDraggableImageControl(Mat image, Mat image_orig)
        {
            var mainWindow = Window.GetWindow(this) as MainWindow;

            // 将Mat转换为BitmapSource
            BitmapSource bitmapSource = MatToBitmapSource(image); // OpenCvSharp.Extensions.BitmapSourceConverter.ToBitmapSource(image);
            BitmapSource bitmapSource2 = MatToBitmapSource(image_orig);

            // 如果窗口已存在，则更新图片内容
            if (_imageWindow != null)  //  && _imageWindow.IsLoaded
            {
                var brdr = _imageWindow.Content as Border;
                var stckpnl = brdr.Child as StackPanel; //  as System.Windows.Controls.Image;
                var img_ctl = stckpnl.Children[1] as System.Windows.Controls.Image;

                //var img_ctl = _imageWindow.Content as System.Windows.Controls.Image;
                if (img_ctl != null)
                {
                    img_ctl.Source = bitmapSource;
                    
                    // 根据新图片调整窗口大小
                    AdjustWindowSizeBasedOnImage(_imageWindow, bitmapSource.PixelWidth, bitmapSource.PixelHeight);

                    mainWindow?.ShowImageInPanel(bitmapSource2);
                }
                return;
            }

            // 创建一个新窗口
            _imageWindow = new Window
            {
                WindowStyle = WindowStyle.None,
                AllowsTransparency = true,
                Background = Brushes.Transparent,
                ShowInTaskbar = false,
                Topmost = true,
                Focusable = false,
                ResizeMode = ResizeMode.NoResize,
                SizeToContent = SizeToContent.WidthAndHeight,
                Owner = Window.GetWindow(this) // 设置主窗口为所有者，这样主窗口关闭时，图片窗口也会关闭
            };
            
            // 创建一个边框和图片控件
            Border border = new Border
            {
                Background = new SolidColorBrush(Color.FromArgb(200, 30, 30, 30)),
                BorderBrush = Brushes.LightGray,
                BorderThickness = new Thickness(1),
                CornerRadius = new CornerRadius(3),
                Padding = new Thickness(5)
            };
            
            // 创建一个StackPanel来包含图片和标题栏
            StackPanel stackPanel = new StackPanel {
                HorizontalAlignment = HorizontalAlignment.Left
            };
            
            // 添加一个简单的标题栏
            Grid titleBar = new Grid { Height = 20, Margin = new Thickness(0, 0, 0, 5) };
            titleBar.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            titleBar.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });
            
            TextBlock titleText = new TextBlock
            {
                Text = "图片预览",
                Foreground = Brushes.White,
                VerticalAlignment = VerticalAlignment.Center
            };
            
            Button closeButton = new Button
            {
                Content = "X",
                Width = 20,
                Height = 20,
                Padding = new Thickness(0),
                Background = Brushes.Transparent,
                Foreground = Brushes.White,
                BorderThickness = new Thickness(0)
            };
            closeButton.Click += (s, e) => _imageWindow.Close();
            
            Grid.SetColumn(titleText, 0);
            Grid.SetColumn(closeButton, 1);
            titleBar.Children.Add(titleText);
            titleBar.Children.Add(closeButton);
            
            // 创建图片控件
            System.Windows.Controls.Image imageControl = new System.Windows.Controls.Image
            {
                Source = bitmapSource,
                Stretch = Stretch.None,
                HorizontalAlignment = HorizontalAlignment.Left
            };
            
            // 添加到StackPanel
            stackPanel.Children.Add(titleBar);
            stackPanel.Children.Add(imageControl);
            
            // 设置边框内容
            border.Child = stackPanel;
            
            // 设置窗口内容
            _imageWindow.Content = border;
            
            // 添加拖动功能
            border.MouseLeftButtonDown += (s, e) =>
            {
                if (e.ClickCount == 1)
                {
                    _imageWindow.DragMove();
                }
            };
            
            // 添加右键菜单
            ContextMenu contextMenu = new ContextMenu();
            MenuItem closeMenuItem = new MenuItem { Header = "关闭" };
            closeMenuItem.Click += (s, e) => _imageWindow.Close();
            contextMenu.Items.Add(closeMenuItem);
            border.ContextMenu = contextMenu;
            
            // 显示窗口
            _imageWindow.Show();  // 单行文本图

            // 根据图片大小调整窗口尺寸
            AdjustWindowSizeBasedOnImage(_imageWindow, bitmapSource.PixelWidth, bitmapSource.PixelHeight);
            
            // 设置初始位置（居中显示）
            if (mainWindow != null)
            {
                _imageWindow.Left = 0; // mainWindow.Left + (mainWindow.Width - _imageWindow.ActualWidth) / 2;
                _imageWindow.Top = mainWindow.Top + (mainWindow.Height - _imageWindow.ActualHeight) / 2;
            }

            if (mainWindow != null)
            {
                //if (true || mainWindow.ImageViewer.Source == null)
                //{
                //    mainWindow.ShowImageInPanel(bitmapSource2);  // 全图
                //}
            }


        }
        
        // 根据图片大小调整窗口尺寸的辅助方法
        private void AdjustWindowSizeBasedOnImage(Window window, int imageWidth, int imageHeight)
        {
            // 获取当前屏幕的工作区大小
            double screenWidth = SystemParameters.WorkArea.Width;
            double screenHeight = SystemParameters.WorkArea.Height;
            
            // 设置窗口最大尺寸（考虑到标题栏、边框等UI元素的额外空间）
            double maxWidth = screenWidth * 0.8; // 最大宽度为屏幕工作区的80%
            double maxHeight = screenHeight * 0.8; // 最大高度为屏幕工作区的80%
            
            // 计算额外UI元素的空间（标题栏、边框、内边距等）
            const double uiExtraWidth = 30; // 估计的水平方向额外空间
            const double uiExtraHeight = 50; // 估计的垂直方向额外空间（包括标题栏）
            
            // 计算实际需要的窗口尺寸
            double requiredWidth = imageWidth + uiExtraWidth;
            double requiredHeight = imageHeight + uiExtraHeight;
            
            // 如果图片尺寸超过最大限制，则应用缩放
            if (requiredWidth > maxWidth || requiredHeight > maxHeight)
            {
                // 计算需要的缩放比例
                double scaleX = maxWidth / requiredWidth;
                double scaleY = maxHeight / requiredHeight;
                double scale = Math.Min(scaleX, scaleY); // 取较小的缩放比例，确保完全适应
                
                // 应用缩放
                var image = ((window.Content as Border).Child as StackPanel).Children[1] as System.Windows.Controls.Image;
                if (image != null)
                {
                    // 更改图片的缩放模式
                    image.Stretch = Stretch.Uniform;
                    image.MaxWidth = maxWidth - uiExtraWidth;
                    image.MaxHeight = maxHeight - uiExtraHeight;
                }
            }
            
            // 更新窗口布局
            window.UpdateLayout();
        }

        #region 依赖属性

        public static readonly DependencyProperty TextProperty =
            DependencyProperty.Register("Text", typeof(string), typeof(TextEditorControl),
                new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnTextChanged));

        public static readonly DependencyProperty IsReadOnlyProperty =
            DependencyProperty.Register("IsReadOnly", typeof(bool), typeof(TextEditorControl),
                new PropertyMetadata(false));

        public static readonly DependencyProperty TabSizeProperty =
            DependencyProperty.Register("TabSize", typeof(int), typeof(TextEditorControl),
                new PropertyMetadata(4));

        public static readonly DependencyProperty LineNumbersVisibleProperty =
            DependencyProperty.Register("LineNumbersVisible", typeof(bool), typeof(TextEditorControl),
                new PropertyMetadata(true));

        public static readonly DependencyProperty ShowWhitespacesProperty =
            DependencyProperty.Register("ShowWhitespaces", typeof(bool), typeof(TextEditorControl),
                new PropertyMetadata(true));

        public static readonly DependencyProperty HighlightCurrentLineProperty =
            DependencyProperty.Register("HighlightCurrentLine", typeof(bool), typeof(TextEditorControl),
                new PropertyMetadata(true));

        #endregion
    
    // 创建右键菜单的方法
    private void CreateContextMenu()
    {
        ContextMenu = new ContextMenu();
        
        // 复制菜单项
        MenuItem copyMenuItem = new MenuItem
        {
            Header = "复制",
            Command = ApplicationCommands.Copy
        };
        ContextMenu.Items.Add(copyMenuItem);
        
        // 剪切菜单项
        MenuItem cutMenuItem = new MenuItem
        {
            Header = "剪切",
            Command = ApplicationCommands.Cut
        };
        ContextMenu.Items.Add(cutMenuItem);
        
        // 粘贴菜单项
        MenuItem pasteMenuItem = new MenuItem
        {
            Header = "粘贴",
            Command = ApplicationCommands.Paste
        };
        ContextMenu.Items.Add(pasteMenuItem);
        
        // 分隔符
        ContextMenu.Items.Add(new Separator());
        
        // 全选菜单项
        MenuItem selectAllMenuItem = new MenuItem
        {
            Header = "全选",
            Command = ApplicationCommands.SelectAll
        };
        ContextMenu.Items.Add(selectAllMenuItem);


        // jisho查询菜单项
        MenuItem jishoMenuItem = new MenuItem
        {
            Header = "jisho"
        };
        jishoMenuItem.Click += OnjishoMenuItemClick;
        ContextMenu.Items.Add(jishoMenuItem);

        // naverja查询菜单项
        MenuItem naverjaMenuItem = new MenuItem
        {
            Header = "naverja"
        };
        naverjaMenuItem.Click += OnnaverjaMenuItemMenuItemClick;
        ContextMenu.Items.Add(naverjaMenuItem);

        // 查询菜单项
        MenuItem QeryMenuItem = new MenuItem
        {
            Header = "查询"
        };
        QeryMenuItem.Click += OnQueryMenuItemClick;
        ContextMenu.Items.Add(QeryMenuItem);

        // 翻译菜单项
        MenuItem translateMenuItem = new MenuItem
        {
            Header = "翻译"
        };
        translateMenuItem.Click += OnTranslateMenuItemClick;
        ContextMenu.Items.Add(translateMenuItem);

        // 设置菜单打开前的事件处理，用于控制菜单项的可用性
        ContextMenu.Opened += OnContextMenuOpened;
    }

    // 右键菜单打开时的事件处理
    private void OnContextMenuOpened(object sender, RoutedEventArgs e)
    {
        bool hasSelection = HasSelection();
        bool hasClipboardText = Clipboard.ContainsText() || Clipboard.ContainsData("TextEditorCustomFormat"); 
        
        // 根据当前状态设置菜单项的可用性
        foreach (var item in ContextMenu.Items)
        {
            if (item is MenuItem menuItem)
            {
                if (menuItem.Command == ApplicationCommands.Copy || 
                    menuItem.Command == ApplicationCommands.Cut)
                {
                    menuItem.IsEnabled = hasSelection;
                }
                else if (menuItem.Command == ApplicationCommands.Paste)
                {
                    menuItem.IsEnabled = !IsReadOnly && hasClipboardText;
                }
                else if (menuItem.Command == ApplicationCommands.SelectAll)
                {
                    menuItem.IsEnabled = _lines.Count > 0 && 
                        _lines.Any(line => line.Characters.Count > 0);
                }
            }
        }
    }

        // "翻译"菜单项点击事件处理
        private async void OnTranslateMenuItemClick(object sender, RoutedEventArgs e)
        {

            if (HasSelection()) {
                string text = GetSelectedText();
                string res = await DeepSeek.translate(text);
                if (res != "")
                {
                    JObject jsn = Newtonsoft.Json.JsonConvert.DeserializeObject<JObject>(res);
                    string zh = jsn["choices"][0]["message"]["content"].Value<string>();
                    var win = new TranslationResultWindow(zh);
                    win.Owner = Window.GetWindow(this);
                    win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
                    win.ShowDialog();
                }
            }
        }

        private async void OnjishoMenuItemClick(object sender, RoutedEventArgs e)
        {
            if (HasSelection())
            {
                string text = GetSelectedText();
                var content = System.Web.HttpUtility.UrlEncode(text);
                String url = $"https://jisho.org/search/{content}";

                var win = Echodict.EchodictWindow.Instance;
                win.WindowStartupLocation = WindowStartupLocation.CenterScreen;
                win.OpenUrl(url);
            }
        }

        private async void OnnaverjaMenuItemMenuItemClick(object sender, RoutedEventArgs e)
        {
            if (HasSelection())
            {
                string text = GetSelectedText();
                var content = System.Web.HttpUtility.UrlEncode(text);
                String url = $"https://ja.dict.naver.com/#/search?query={content}&range=all";

                var win = Echodict.EchodictWindow.Instance;
                win.WindowStartupLocation = WindowStartupLocation.CenterScreen;
                win.OpenUrl(url);
            }
        }

        // "查询"菜单项点击事件处理
        private async void OnQueryMenuItemClick(object sender, RoutedEventArgs e)
        {
            if (HasSelection())
            {
                string text = GetSelectedText();

                //var win = Echodict.EchodictWindow.Instance;
                //win.Owner = Window.GetWindow(this);
                //win.WindowStartupLocation = WindowStartupLocation.CenterOwner;
                //win.ShowWord(text);
                var win = Echodict.EchodictWindow.Instance;
                // Without an Owner, CenterOwner behaves like Manual. Use CenterScreen instead.
                win.WindowStartupLocation = WindowStartupLocation.CenterScreen;
                win.ShowWord(text);
            }
        }

        #region 属性

        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        public bool IsReadOnly
        {
            get { return (bool)GetValue(IsReadOnlyProperty); }
            set { SetValue(IsReadOnlyProperty, value); }
        }

        public int TabSize
        {
            get { return (int)GetValue(TabSizeProperty); }
            set { SetValue(TabSizeProperty, value); }
        }

        public bool LineNumbersVisible
        {
            get { return (bool)GetValue(LineNumbersVisibleProperty); }
            set { SetValue(LineNumbersVisibleProperty, value); }
        }

        public bool ShowWhitespaces
        {
            get { return (bool)GetValue(ShowWhitespacesProperty); }
            set { SetValue(ShowWhitespacesProperty, value); }
        }

        public bool HighlightCurrentLine
        {
            get { return (bool)GetValue(HighlightCurrentLineProperty); }
            set { SetValue(HighlightCurrentLineProperty, value); }
        }

        #endregion

        #region 内部数据结构

        public List<TextLine> _lines = new List<TextLine>();
        public int _cursorLine = 0;
        public int _cursorColumn = 0;
        public int _selectionStartLine = -1;
        public int _selectionStartColumn = -1;
        public int _selectionEndLine = -1;
        public int _selectionEndColumn = -1;
        public List<UndoAction> _undoBuffer = new List<UndoAction>();
        public int _undoIndex = -1;
        public bool _textChanged = false;
        public int _scrollOffset = 0; // 添加滚动偏移量变量

        // 查找相关字段
        private FindDialog _findDialog = null;
        private string _lastSearchText = "";
        private bool _lastMatchCase = false;
        private bool _lastWholeWord = false;
        private int _lastFoundLine = -1;
        private int _lastFoundColumn = -1;
        private List<(int line, int column, int length)> _findResults = new List<(int, int, int)>();
        private int _currentFindIndex = -1;

        #endregion

        #region 构造函数

        static TextEditorControl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(TextEditorControl),
                new FrameworkPropertyMetadata(typeof(TextEditorControl)));
        }

        public TextEditorControl()
        {
            this.Focusable = true;
            this.FocusVisualStyle = null;
            this.ClipToBounds = true;
            
            // 设置MainWindow引用
            //_mainWindow = mainWindow;

            // 初始化一个空行
            _lines.Add(new TextLine());

            // 注册命令绑定
            CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, OnCopy));
            CommandBindings.Add(new CommandBinding(ApplicationCommands.Cut, OnCut));
            CommandBindings.Add(new CommandBinding(ApplicationCommands.Paste, OnPaste));
            CommandBindings.Add(new CommandBinding(ApplicationCommands.Undo, OnUndo));
            CommandBindings.Add(new CommandBinding(ApplicationCommands.Redo, OnRedo));
            CommandBindings.Add(new CommandBinding(ApplicationCommands.SelectAll, OnSelectAll));
        
            // 创建右键菜单
            CreateContextMenu();
        
        }

        #endregion

        #region 事件处理

        public static void OnTextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var control = (TextEditorControl)d;
            if (e.NewValue is string)
            {
                //control.SetText((string)e.NewValue);
            }
            else if (e.NewValue is JObject)
            {
                //control.SetText((JObject)e.NewValue, "");
            }
            
            
        }

        protected override void OnRender(DrawingContext drawingContext)
        {
            base.OnRender(drawingContext);
            RenderEditor(drawingContext);
        }

        protected override void OnMouseWheel(MouseWheelEventArgs e)
        {
            base.OnMouseWheel(e);
            
            // 计算字体度量
            double lineHeight = FontSize * 1.2;
            
            // 根据滚轮方向调整滚动偏移量
            // 向上滚动（e.Delta > 0）时，减小偏移量，向下滚动时增加偏移量
            int scrollLines = e.Delta > 0 ? -3 : 3;
            _scrollOffset += scrollLines;
            
            // 限制滚动范围
            int maxVisibleLines = (int)(ActualHeight / lineHeight);
            int maxScrollOffset = Math.Max(0, _lines.Count - maxVisibleLines + 1);
            _scrollOffset = Math.Max(0, Math.Min(_scrollOffset, maxScrollOffset));
            
            // 完全移除对光标位置的限制，允许自由滚动查看文档
            
            e.Handled = true;
            InvalidateVisual();
        }

        protected override void OnTextInput(TextCompositionEventArgs e)
        {
            base.OnTextInput(e);
            if (!IsReadOnly)
            {
                //InsertText(e.Text);
                InsertTextCharacters(e.Text);

                // 标记文本已更改
                _textChanged = true;

                // 触发文本改变事件
                OnTextChanged();

                // 触发光标位置改变事件
                OnCursorPositionChanged(_cursorLine, _cursorColumn);

                // 重绘编辑器
                InvalidateVisual();

                e.Handled = true;
            }
        }

        protected override void OnKeyDown(KeyEventArgs e)
        {
            base.OnKeyDown(e);
            HandleKeyDown(e);
        }

        public void showCurrChar()
        {
            TextCharacter chr = GetCharacterAfterCursor();
            if (chr != null)
            {
                string m5 = chr.ImageMD5;
                if (m5 != "")
                {
                    //var (pth_img, pth_json) = Global.get_img_json_pth(m5);
                    var (pth_img, pth_json) = Global.get_img_json_pthv2(_pthimg);
                    if (Path.Exists(pth_json) && Path.Exists(pth_img))
                    {
                        string jsn_str = File.ReadAllText(pth_json, Encoding.UTF8);
                        JObject jsn = (JObject)JsonConvert.DeserializeObject(jsn_str);


                        string b64_str = File.ReadAllText(pth_img, Encoding.UTF8);
                        byte[] img_bytes = Base64.Base64Decode(b64_str);

                        Mat im_orig = Cv2.ImDecode(img_bytes, ImreadModes.Color);

                        int width = jsn.Value<int>("width");
                        int height = jsn.Value<int>("height");

                        var prism_wordsInfo = jsn["prism_wordsInfo"].Value<JArray>();
                        bool found = false;
                        foreach (var item in prism_wordsInfo)
                        {
                            JArray charInfo = item["charInfo"].Value<JArray>();
                            string line_word = item["word"].Value<string>();
                            int line_x = item["x"].Value<int>();
                            int line_y = item["y"].Value<int>();
                            int line_width = item["width"].Value<int>();
                            int line_height = item["height"].Value<int>();

                            foreach (var item2 in charInfo)
                            {
                                string oneChar = item2["word"].Value<string>();
                                int x = item2["x"].Value<int>();
                                int y = item2["y"].Value<int>();
                                int w = item2["w"].Value<int>();
                                int h = item2["h"].Value<int>();

                                //if (oneChar == chr.Character.ToString())
                                if (true)  // 修改字符后它就可以不等了。有相同坐标宽高的字符只有一种情况，就是它们都是某个“单词”的一部分
                                {
                                    if (chr.x == x)
                                    {
                                        if (chr.y == y)
                                        {



                                            Cv2.Rectangle(im_orig, new OpenCvSharp.Rect(chr.x, chr.y, chr.w, chr.h), new OpenCvSharp.Scalar(0, 0, 255));

                                            Mat cut = im_orig.Clone(new OpenCvSharp.Rect(0, line_y, im_orig.Width, line_height));

                                            // 显示图片预览窗口
                                            ShowDraggableImageControl(cut, im_orig);

                                            // 转换坐标到显示坐标系
                                            var displayPos = ConvertOriginalToDisplayCoordinates(chr.x, chr.y);
                                            var displaySize = ConvertOriginalToDisplaySize(chr.w, chr.h);

                                            var x_y_ = ConvertDisplayToOriginalCoordinates(displayPos.X, displayPos.Y);

                                            var w_h_ = ConvertDisplayToOriginalSize(displaySize.Width, displaySize.Height);

                                            // 调用MainWindow显示选框
                                            _mainWindow?.ShowCharacterSelection(displayPos.X, displayPos.Y, displaySize.Width, displaySize.Height);

                                            found = true;
                                            break;
                                        }
                                    }
                                }

                            }

                            if (found)
                            {
                                break;
                            }


                        }





                    }
                }

                System.Diagnostics.Debug.WriteLine($"光标后字符: {chr.Character}");
            }
        }

        protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
        {
            base.OnMouseLeftButtonDown(e);
            Focus();
            Point position = e.GetPosition(this);
            SetCursorPositionFromPoint(position);
            if (Keyboard.Modifiers != ModifierKeys.Shift)
            {
                ClearSelection();
            }
            else
            {
                UpdateSelection();
            }

            // 图片中框选光标后面的第一个字符
            if (e.ChangedButton == MouseButton.Left && e.ButtonState == MouseButtonState.Pressed)
            {
                showCurrChar();
            }

            e.Handled = true;
            InvalidateVisual();
        }

        // 重写右键按下事件
        protected override void OnMouseRightButtonDown(MouseButtonEventArgs e)
        {
            base.OnMouseRightButtonDown(e);
            
            // 设置焦点
            Focus();
            
            // 获取鼠标位置并设置光标位置
            Point position = e.GetPosition(this);
            
            // 如果右键点击的位置不在当前选择区域内，则移动光标到点击位置
            // 但不清除选择区域，这样在选中文本上右键点击时不会丢失选择
            if (!IsPositionInSelection(position))
            {
                //SetCursorPositionFromPoint(position);
                // 移除以下行，不再清除选择区域
                // ClearSelection();
                InvalidateVisual();
            }
            
            e.Handled = true;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                Point position = e.GetPosition(this);
                SetCursorPositionFromPoint(position);
                UpdateSelection();
                InvalidateVisual();
            }
        }

        #endregion

        #region 命令处理

        // 将原图坐标转换为显示坐标
        public Point ConvertOriginalToDisplayCoordinates(int originalX, int originalY)
        {
            if (_mainWindow?.ViewModel?.Image == null)
                return new Point(originalX, originalY);

            // 获取图片控件
            var imageElement = _mainWindow.image;
            if (imageElement == null)
                return new Point(originalX, originalY);

            // 获取原图尺寸
            double originalWidth = _mainWindow.ViewModel.Image.PixelWidth;
            double originalHeight = _mainWindow.ViewModel.Image.PixelHeight;

            // 获取显示尺寸
            double displayWidth = imageElement.ActualWidth;
            double displayHeight = imageElement.ActualHeight;

            // 计算缩放比例
            double scaleX = displayWidth / originalWidth;
            double scaleY = displayHeight / originalHeight;

            // 转换坐标
            double displayX = originalX * scaleX;
            double displayY = originalY * scaleY;

            return new Point(displayX, displayY);
        }

        // 将显示坐标转换为原图坐标
        public Point ConvertDisplayToOriginalCoordinates(double displayX, double displayY)
        {
            if (_mainWindow?.ViewModel?.Image == null)
                return new Point(displayX, displayY);

            // 获取图片控件
            var imageElement = _mainWindow.image;
            if (imageElement == null)
                return new Point(displayX, displayY);

            // 获取原图尺寸
            double originalWidth = _mainWindow.ViewModel.Image.PixelWidth;
            double originalHeight = _mainWindow.ViewModel.Image.PixelHeight;

            // 获取显示尺寸
            double displayWidth = imageElement.ActualWidth;
            double displayHeight = imageElement.ActualHeight;

            // 计算缩放比例
            double scaleX = displayWidth / originalWidth;
            double scaleY = displayHeight / originalHeight;

            // 反向转换坐标（除法操作）
            double originalX = displayX / scaleX;
            double originalY = displayY / scaleY;

            return new Point(originalX, originalY);
        }

        // 将原图尺寸转换为显示尺寸
        public Size ConvertOriginalToDisplaySize(int originalWidth, int originalHeight)
        {
            if (_mainWindow?.ViewModel?.Image == null)
                return new Size(originalWidth, originalHeight);

            // 获取图片控件
            var imageElement = _mainWindow.image;
            if (imageElement == null)
                return new Size(originalWidth, originalHeight);

            // 获取原图尺寸
            double imgOriginalWidth = _mainWindow.ViewModel.Image.PixelWidth;
            double imgOriginalHeight = _mainWindow.ViewModel.Image.PixelHeight;

            // 获取显示尺寸
            double displayWidth = imageElement.ActualWidth;
            double displayHeight = imageElement.ActualHeight;

            // 计算缩放比例
            double scaleX = displayWidth / imgOriginalWidth;
            double scaleY = displayHeight / imgOriginalHeight;

            // 转换尺寸
            double scaledWidth = originalWidth * scaleX;
            double scaledHeight = originalHeight * scaleY;

            return new Size(scaledWidth, scaledHeight);
        }

        // 将显示尺寸转换为原图尺寸
        public Size ConvertDisplayToOriginalSize(double displayWidth, double displayHeight)
        {
            if (_mainWindow?.ViewModel?.Image == null)
                return new Size(displayWidth, displayHeight);

            // 获取图片控件
            var imageElement = _mainWindow.image;
            if (imageElement == null)
                return new Size(displayWidth, displayHeight);

            // 获取原图尺寸
            double imgOriginalWidth = _mainWindow.ViewModel.Image.PixelWidth;
            double imgOriginalHeight = _mainWindow.ViewModel.Image.PixelHeight;

            // 获取显示尺寸
            double imgDisplayWidth = imageElement.ActualWidth;
            double imgDisplayHeight = imageElement.ActualHeight;

            // 计算缩放比例
            double scaleX = imgDisplayWidth / imgOriginalWidth;
            double scaleY = imgDisplayHeight / imgOriginalHeight;

            // 反向转换尺寸（除法操作）
            double originalWidth = displayWidth / scaleX;
            double originalHeight = displayHeight / scaleY;

            return new Size(originalWidth, originalHeight);
        }

        private void OnCopy(object sender, ExecutedRoutedEventArgs e)
        {
            if (HasSelection())
            {
                _isCut = false;
                
                // 创建DataObject来同时设置多种格式
                DataObject dataObject = new DataObject();
                
                // 设置标准文本格式（供其他程序使用）
                dataObject.SetText(GetSelectedText());
                
                // 序列化TextCharacter列表并保存自定义格式
                try
                {
                    var characters = GetSelectedTextCharacters();
                    if (characters.Count > 0)
                    {
                        string json = Newtonsoft.Json.JsonConvert.SerializeObject(characters);
                        dataObject.SetData("TextEditorCustomFormat", json);
                    }
                }
                catch (Exception ex)
                {
                    System.Diagnostics.Debug.WriteLine($"复制到剪贴板时出错: {ex.Message}");
                }
                
                // 一次性设置到剪贴板
                Clipboard.SetDataObject(dataObject);
            }
            e.Handled = true;
        }



        private void OnCut(object sender, ExecutedRoutedEventArgs e)
        {
            if (!IsReadOnly && HasSelection())
            {
                _isCut = true;

                // 创建DataObject来同时设置多种格式
                DataObject dataObject = new DataObject();
                
                // 设置标准文本格式（供其他程序使用）
                dataObject.SetText(GetSelectedText());

                // 序列化TextCharacter列表并保存自定义格式
                try
                {
                    var characters = GetSelectedTextCharacters();
                    if (characters.Count > 0)
                    {
                        // 序列化
                        string json = Newtonsoft.Json.JsonConvert.SerializeObject(characters);
                        dataObject.SetData("TextEditorCustomFormat", json);
                    }
                }
                catch (Exception ex)
                {
                    System.Diagnostics.Debug.WriteLine($"剪切到剪贴板时出错: {ex.Message}");
                }
                
                // 一次性设置到剪贴板
                Clipboard.SetDataObject(dataObject);

                DeleteSelection();
                InvalidateVisual();
            }
            e.Handled = true;
        }

        private void OnPaste(object sender, ExecutedRoutedEventArgs e)
        {
            if (!IsReadOnly)
            {
                List<TextCharacter> characters_selected = GetSelectedTextCharacters();
                
                // 尝试从剪贴板获取自定义格式数据
                bool customDataPasted = false;
                if (Clipboard.ContainsData("TextEditorCustomFormat"))
                {
                    try
                    {
                        // 反序列化
                        string json = Clipboard.GetData("TextEditorCustomFormat") as string;
                        //List<TextCharacter> characters = (List<TextCharacter>)Newtonsoft.Json.JsonConvert.DeserializeObject<List<TextCharacter>>(json);

                        List<TextCharacter> characters = new List<TextCharacter>();

                        List<JObject> ls = Newtonsoft.Json.JsonConvert.DeserializeObject<List<JObject>>(json);
                        // System.Text.Rune 字段不支持直接序列化，所以需要转换

                        foreach (var item in ls)
                        {
                            var Character = item["Character"].Value<JObject>();
                            var Value = Character["Value"].Value<int>();
                            System.Text.Rune rune = new System.Text.Rune(Value);

                            // 反序列化每个字符
                            var chr = new TextCharacter(
                                rune, // 获取第一个字符
                                item["guid"].Value<string>(),
                                item["x"].Value<int>(),
                                item["y"].Value<int>(),
                                item["w"].Value<int>(),
                                item["h"].Value<int>(),
                                item["ImageMD5"].Value<string>()
                            );
                            characters.Add(chr);
                        }

                        if (characters != null && characters.Count > 0)
                        {
                            InsertTextCharacters(characters);
                            customDataPasted = true;
                        }
                    }
                    catch (Exception ex)
                    {
                        System.Diagnostics.Debug.WriteLine($"从剪贴板粘贴时出错: {ex.Message}");
                        customDataPasted = false;
                    }
                }

                // 如果是复制的普通文本
                if (!customDataPasted && Clipboard.ContainsText())
                {
                    string text = Clipboard.GetText();
                    if (text.Length > 0)
                    {
                        //List<TextCharacter> characters = new List<TextCharacter>();

                        //TextCharacter c = null;
                        //if (characters_selected.Count > 0)
                        //{
                        //    c = characters_selected[0];
                        //}

                        //for (int i = 0; i < text.Length;)
                        //{
                        //    Rune rune = Rune.GetRuneAt(text, i);

                        //    var chr = new TextCharacter(
                        //        rune,
                        //        c.guid,
                        //        c.x,
                        //        c.y,
                        //        c.w,
                        //        c.h,
                        //        c.ImageMD5
                        //    );
                        //    characters.Add(chr);

                        //    i += rune.Utf16SequenceLength;
                        //}

                        //if (characters != null && characters.Count > 0)
                        //{
                        //    InsertTextCharacters(characters);
                        //}

                        InsertTextCharacters(text);

                    }
                }

                if (_isCut)
                {
                    Clipboard.Clear();
                    _isCut = false; // 重置剪切状态
                }

                InvalidateVisual();
            }

            if (HasSelection())
            {
                DeleteSelection();
            }

            e.Handled = true;
        }


       public void InsertTextCharacters(string text)
       {
            if (text.Length > 0)
            {
                List<TextCharacter> characters = new List<TextCharacter>();

                TextCharacter c = null;
                if (HasSelection())
                {
                    List<TextCharacter> characters_selected = GetSelectedTextCharacters();
                    if (characters_selected.Count > 0)
                    {
                        c = characters_selected[0];
                    }
                } else
                {
                    c = GetCharacterAfterCursor();
                    if (c == null)
                    {
                        c = GetCharacterBeforeCursor();
                    }
                }

                for (int i = 0; i < text.Length;)
                {
                    Rune rune = Rune.GetRuneAt(text, i);

                    if (c != null)
                    {
                        var chr = new TextCharacter(
                            rune,
                            c.guid,
                            c.x,
                            c.y,
                            c.w,
                            c.h,
                            c.ImageMD5
                        );
                        characters.Add(chr);

                    }
                    else 
                    {
                        var chr = new TextCharacter(
                            rune,
                            Guid.NewGuid().ToString(),
                            - 1,
                            -1,
                            -1,
                            -1,
                            ""
                        );
                        characters.Add(chr);
                    }
                    i += rune.Utf16SequenceLength;
                }

                if (characters != null && characters.Count > 0)
                {
                    InsertTextCharacters(characters);
                }
            }
        }

       private void InsertTextCharacters(List<TextCharacter> characters)
        {
            if (characters == null || characters.Count == 0)
                return;
                
            // 如果有选中的文本，先删除它
            if (HasSelection())
            {
                DeleteSelection();
            }

            // 记录撤销操作
            var undoAction = new UndoAction
            {
                CursorBeforeLine = _cursorLine,
                CursorBeforeColumn = _cursorColumn
            };
            
            // 将字符插入到当前行的光标位置
            var line = _lines[_cursorLine];
            line.Characters.InsertRange(_cursorColumn, characters);
            _cursorColumn += characters.Count;
            
            // 记录添加的文本信息
            undoAction.AddedText = string.Concat(characters.Select(c => c.Character.ToString()));
            undoAction.AddedStartLine = _cursorLine;
            undoAction.AddedStartColumn = _cursorColumn - characters.Count;
            undoAction.AddedEndLine = _cursorLine;
            undoAction.AddedEndColumn = _cursorColumn;
            
            // 记录撤销操作后的光标位置
            undoAction.CursorAfterLine = _cursorLine;
            undoAction.CursorAfterColumn = _cursorColumn;

            // 添加到撤销缓冲区
            if (_undoIndex < _undoBuffer.Count - 1)
            {
                _undoBuffer.RemoveRange(_undoIndex + 1, _undoBuffer.Count - _undoIndex - 1);
            }
            _undoBuffer.Add(undoAction);
            _undoIndex = _undoBuffer.Count - 1;

            // 标记文本已更改
            _textChanged = true;

            // 触发文本改变事件
            OnTextChanged();

            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
        }

        private void OnUndo(object sender, ExecutedRoutedEventArgs e)
        {
            if (!IsReadOnly && CanUndo())
            {
                Undo();
                InvalidateVisual();
            }
            e.Handled = true;
        }

        private void OnRedo(object sender, ExecutedRoutedEventArgs e)
        {
            if (!IsReadOnly && CanRedo())
            {
                Redo();
                InvalidateVisual();
            }
            e.Handled = true;
        }

        private void OnSelectAll(object sender, ExecutedRoutedEventArgs e)
        {
            SelectAll();
            InvalidateVisual();
            e.Handled = true;
        }

        #endregion

        #region 辅助方法

        public void SetText(string text)
        {
            _lines.Clear();
            _undoBuffer.Clear();
            _undoIndex = -1;

            if (string.IsNullOrEmpty(text))
            {
                _lines.Add(new TextLine());
            }
            else
            {
                var lines = text.Replace("\r\n", "\n").Replace("\r", "\n").Split('\n');
                foreach (var line in lines)
                {
                    var textLine = new TextLine();
                    foreach (var c in line)
                    {
                        textLine.Characters.Add(new TextCharacter(c));
                    }
                    _lines.Add(textLine);
                }
            }

            _cursorLine = 0;
            _cursorColumn = 0;
            ClearSelection();
            _textChanged = true;
            InvalidateVisual();
            
            // 触发文本改变事件
            OnTextChanged();
        }

        public void SetText(JObject jsn, string md5)
        {
            _lines.Clear();
            _undoBuffer.Clear();
            _undoIndex = -1;

            if (jsn == null)
            {
                SetText(string.Empty);
            }
            else
            {
                int width = jsn.Value<int>("width");
                int height = jsn.Value<int>("height");

                var prism_wordsInfo = jsn["prism_wordsInfo"].Value<JArray>();
                foreach (var item in prism_wordsInfo) 
                {
                    JArray charInfo = item["charInfo"].Value<JArray>();
                    string line_word = item["word"].Value<string>();

                    var textLine = new TextLine();
                    foreach (var item2 in charInfo)
                    {
                        string oneChar = item2["word"].Value<string>();
                        string guid = item2["guid"].Value<string>();
                        int isDeleted = item2["isDeleted"].Value<int>();
                            // 就算是阿里云的 json ，也要先给它加入 guid
                        //if (item2["guid"] != null)
                        //{
                        //    guid = item2["guid"].Value<string>();
                        //} else
                        //{
                        //    guid = Guid.NewGuid().ToString();
                        //}

                        if (isDeleted == 1)
                        {
                            continue;
                        }

                        int x = item2["x"].Value<int>();
                        int y = item2["y"].Value<int>();
                        int w = item2["w"].Value<int>();
                        int h = item2["h"].Value<int>();

                        // 遍历 oneChar 中的每个字符
                        for (int i = 0; i < oneChar.Length;)
                        {
                            // 获取当前位置的 Rune
                            Rune rune = Rune.GetRuneAt(oneChar, i);  // 4 个字节表示单个字符

                            // 将 Rune 添加到字符列表中
                            textLine.Characters.Add(new TextCharacter(rune, guid, x, y, w, h, md5));

                            // 移动到下一个 Rune 的位置
                            i += rune.Utf16SequenceLength;
                        }

                        //Rune rune = Rune.GetRuneAt(oneChar, 0); // 4 个字节表示单个字符

                        //textLine.Characters.Add(new TextCharacter(rune, x, y, w, h, md5));
                    }

                    _lines.Add(textLine);

                }

            }

            _cursorLine = 0;
            _cursorColumn = 0;
            ClearSelection();
            _textChanged = true;
            InvalidateVisual();

            // 触发文本改变事件
            OnTextChanged();
        }


        public List<TextLine> get_text_lines(JObject jsn, string md5)
        {
            List<TextLine> lines = new List<TextLine>();

            int width = jsn.Value<int>("width");
            int height = jsn.Value<int>("height");

            var prism_wordsInfo = jsn["prism_wordsInfo"].Value<JArray>();
            foreach (var item in prism_wordsInfo)
            {
                JObject selected_rectange = new JObject();
                if (_mode == EditorMode.ReviseEdit) // 校对模式才有选框
                {
                    selected_rectange = item["selected_rectange"].Value<JObject>();
                }

                JArray pos = item["pos"].Value<JArray>();
                JArray charInfo = item["charInfo"].Value<JArray>();


                string line_word = item["word"].Value<string>();

                var textLine = new TextLine(pos, selected_rectange);
                foreach (var item2 in charInfo)
                {
                    string oneChar = item2["word"].Value<string>();
                    string guid = item2["guid"].Value<string>();
                    // 就算是阿里云的 json ，也要先给它加入 guid
                    //if (item2["guid"] != null)
                    //{
                    //    guid = item2["guid"].Value<string>();
                    //} else
                    //{
                    //    guid = Guid.NewGuid().ToString();
                    //}
                    int x = item2["x"].Value<int>();
                    int y = item2["y"].Value<int>();
                    int w = item2["w"].Value<int>();
                    int h = item2["h"].Value<int>();

                    // 遍历 oneChar 中的每个字符
                    for (int i = 0; i < oneChar.Length;)
                    {
                        // 获取当前位置的 Rune
                        Rune rune = Rune.GetRuneAt(oneChar, i);  // 4 个字节表示单个字符

                        // 将 Rune 添加到字符列表中
                        textLine.Characters.Add(new TextCharacter(rune, guid, x, y, w, h, md5));

                        // 移动到下一个 Rune 的位置
                        i += rune.Utf16SequenceLength;
                    }

                    //Rune rune = Rune.GetRuneAt(oneChar, 0); // 4 个字节表示单个字符

                    //textLine.Characters.Add(new TextCharacter(rune, x, y, w, h, md5));
                }

                lines.Add(textLine);

            }

            return lines;
        }

        public void InsertText(JObject jsn, string md5)
        {
            _undoBuffer.Clear();
            _undoIndex = -1;

            if (jsn == null)
            {
                SetText(string.Empty);
            }
            else
            {
                //int width = jsn.Value<int>("width");
                //int height = jsn.Value<int>("height");

                //var prism_wordsInfo = jsn["prism_wordsInfo"].Value<JArray>();
                //foreach (var item in prism_wordsInfo)
                //{
                //    JObject selected_rectange = new JObject(); 
                //    if (_mode == EditorMode.ReviseEdit) // 校对模式才有选框
                //    {
                //        selected_rectange = item["selected_rectange"].Value<JObject>();
                //    }

                //    JArray pos = item["pos"].Value<JArray>();
                //    JArray charInfo = item["charInfo"].Value<JArray>();


                //    string line_word = item["word"].Value<string>();

                //    var textLine = new TextLine(pos, selected_rectange);
                //    foreach (var item2 in charInfo)
                //    {
                //        string oneChar = item2["word"].Value<string>();
                //        string guid = item2["guid"].Value<string>();
                //        // 就算是阿里云的 json ，也要先给它加入 guid
                //        //if (item2["guid"] != null)
                //        //{
                //        //    guid = item2["guid"].Value<string>();
                //        //} else
                //        //{
                //        //    guid = Guid.NewGuid().ToString();
                //        //}
                //        int x = item2["x"].Value<int>();
                //        int y = item2["y"].Value<int>();
                //        int w = item2["w"].Value<int>();
                //        int h = item2["h"].Value<int>();

                //        // 遍历 oneChar 中的每个字符
                //        for (int i = 0; i < oneChar.Length;)
                //        {
                //            // 获取当前位置的 Rune
                //            Rune rune = Rune.GetRuneAt(oneChar, i);  // 4 个字节表示单个字符

                //            // 将 Rune 添加到字符列表中
                //            textLine.Characters.Add(new TextCharacter(rune, guid, x, y, w, h, md5));

                //            // 移动到下一个 Rune 的位置
                //            i += rune.Utf16SequenceLength;
                //        }

                //        //Rune rune = Rune.GetRuneAt(oneChar, 0); // 4 个字节表示单个字符

                //        //textLine.Characters.Add(new TextCharacter(rune, x, y, w, h, md5));
                //    }

                //    _lines.Add(textLine);

                //}

                var lines = get_text_lines(jsn, md5);
                foreach(var line in lines)
                {
                    _lines.Add(line);
                }

            }

            //_cursorLine = 0;
            //_cursorColumn = 0;
            ClearSelection();
            _textChanged = true;
            InvalidateVisual();

            // 触发文本改变事件
            OnTextChanged();
        }


        public bool saveJson(string pth_img_)
        {

            bool isModify = false;

            string m5 = MD5.ComputeFileHash(pth_img_);

            var (pth_img, pth_json) = Global.get_img_json_pthv2(pth_img_);

            if (!Path.Exists(pth_json) || !Path.Exists(pth_img))
            {
                return false;
            }

            if (_mode == EditorMode.ReviseEdit)
            {
                Global.saveJsonReviseEdit(pth_json, _lines);
                return false;
            }

            if (_mode == EditorMode.MenuSplit)
            {
                Global.saveJsonReviseEdit(pth_json, _lines);
                return false;
            }


            var jsonstr = File.ReadAllText(pth_json, new System.Text.UTF8Encoding(false));

            JObject jsn = null;
            try
            {
                jsn = JObject.Parse(jsonstr);
            }
            catch (Exception ex)
            {
                MessageBox.Show("json 解析失败", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                return false;
            }

            int width = jsn.Value<int>("width");
            int height = jsn.Value<int>("height");

            var prism_wordsInfo = jsn["prism_wordsInfo"].Value<JArray>();
            foreach (var item in prism_wordsInfo)
            {
                JArray charInfo = item["charInfo"].Value<JArray>();
                string line_word = item["word"].Value<string>();

                var textLine = new TextLine();
                foreach (var item2 in charInfo)
                {
                    string oneChar = item2["word"].Value<string>();
                    string guid = item2["guid"].Value<string>();
                    int x = item2["x"].Value<int>();
                    int y = item2["y"].Value<int>();
                    int w = item2["w"].Value<int>();
                    int h = item2["h"].Value<int>();

                    // 遍历 oneChar 中的每个字符
                    for (int i = 0; i < oneChar.Length;)
                    {
                        Rune rune = Rune.GetRuneAt(oneChar, i);  // 4 个字节表示单个字符

                        // 移动到下一个 Rune 的位置
                        i += rune.Utf16SequenceLength;
                    }

                    if ( _dic_deleted_char.ContainsKey(guid) ) {
                        // 是被标记逻辑删除的字符
                        item2["isDeleted"] = 1;
                        isModify = true;
                    }

                    foreach (TextLine line in _lines)
                    {
                        bool line_modify = false;
                        foreach (TextCharacter c in line.Characters)
                        {
                            string ImageMD5 = c.ImageMD5;
                            if (ImageMD5 == m5)
                            {
                                if (guid == c.guid)
                                {
                                    string c_str = c.Character.ToString();
                                    if (c_str != oneChar)
                                    {
                                        item2["word"] = c_str;
                                        line_modify = true;
                                        isModify = true;
                                    }


                                }
                            }
                        }

                        if (line_modify)
                        {
                            string new_line_word = string.Concat(line.Characters.Select(c => c.Character.ToString()));
                            item["word"] = new_line_word;
                        }
                    }

                }

            }

            if (isModify)
            {
                string jsn_str = jsn.ToString(Formatting.Indented).Replace("\r\n", "\n");
                File.WriteAllText(pth_json, jsn_str);
            }

            return isModify;
        }

        private void RenderEditor(DrawingContext drawingContext)
        {
            // 绘制背景
            drawingContext.DrawRectangle(Brushes.White, null, new Rect(0, 0, ActualWidth, ActualHeight));
            
            // 计算字体度量
            var typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretch);
            double lineHeight = FontSize * 1.2;
            double defaultCharWidth = FontSize * 0.6; // 默认字符宽度（英文）
            
            // 计算行号区域宽度
            double lineNumberWidth = LineNumbersVisible ? 40 : 0;
            
            // 绘制行号区域背景
            if (LineNumbersVisible)
            {
                drawingContext.DrawRectangle(Brushes.LightGray, null, new Rect(0, 0, lineNumberWidth, ActualHeight));
            }
            
            double textStartX = lineNumberWidth + 5; // 文本起始X坐标
            
            // 计算可见行范围
            int visibleLineCount = (int)Math.Ceiling(ActualHeight / lineHeight);
            int startLine = _scrollOffset;
            int endLine = Math.Min(_scrollOffset + visibleLineCount, _lines.Count - 1);
            
            // 高亮当前行
            if (HighlightCurrentLine && _cursorLine >= startLine && _cursorLine <= endLine)
            {
                drawingContext.DrawRectangle(Brushes.LightYellow, null, 
                    new Rect(lineNumberWidth, (_cursorLine - _scrollOffset) * lineHeight, ActualWidth - lineNumberWidth, lineHeight));
            }
            
            // 绘制文本和行号
            for (int i = startLine; i <= endLine; i++)
            {
                double y = (i - _scrollOffset) * lineHeight;
                
                // 绘制行号
                if (LineNumbersVisible)
                {
                    var lineNumberText = new FormattedText(
                        (i + 1).ToString(),
                        System.Globalization.CultureInfo.CurrentCulture,
                        FlowDirection.LeftToRight,
                        typeface,
                        FontSize,
                        Brushes.Gray,
                        VisualTreeHelper.GetDpi(this).PixelsPerDip);
                    
                    drawingContext.DrawText(lineNumberText, new Point(5, y));
                }
                
                // 绘制文本
                var line = _lines[i];
                double x = textStartX;
                
                for (int j = 0; j < line.Characters.Count; j++)
                {
                    var character = line.Characters[j];
                    
                    // 绘制选中区域背景
                    double charWidth = IsFullWidthCharacter(character.Character) ? defaultCharWidth * 2 : defaultCharWidth;
                    
                    if (HasSelection() && IsPositionSelected(i, j))
                    {
                        drawingContext.DrawRectangle(Brushes.LightBlue, null, new Rect(x, y, charWidth, lineHeight));
                    }
                    
                    // 绘制字符
                    var formattedText = new FormattedText(
                        character.Character.ToString(),
                        System.Globalization.CultureInfo.CurrentCulture,
                        FlowDirection.LeftToRight,
                        typeface,
                        FontSize,
                        character.Foreground,
                        VisualTreeHelper.GetDpi(this).PixelsPerDip);
                    
                    drawingContext.DrawText(formattedText, new Point(x, y));
                    
                    // 显示空白字符
                    if (ShowWhitespaces && character.Character.Value == ' ')
                    {
                        drawingContext.DrawLine(
                            new Pen(Brushes.LightGray, 1),
                            new Point(x + charWidth / 2, y + lineHeight / 2),
                            new Point(x + charWidth / 2, y + lineHeight / 2));
                    }
                    
                    x += charWidth;
                }
            }
            
            // 绘制光标
            if (IsFocused && _cursorLine >= startLine && _cursorLine <= endLine)
            {
                // 计算光标X坐标，考虑前面字符的宽度
                double cursorX = textStartX;
                var line = _lines[_cursorLine];
                for (int j = 0; j < _cursorColumn && j < line.Characters.Count; j++)
                {
                    cursorX += IsFullWidthCharacter(line.Characters[j].Character) ? defaultCharWidth * 2 : defaultCharWidth;
                }
                
                double cursorY = (_cursorLine - _scrollOffset) * lineHeight;
                
                drawingContext.DrawLine(
                    new Pen(Brushes.Black, 1),
                    new Point(cursorX, cursorY),
                    new Point(cursorX, cursorY + lineHeight));
            }
        }

        // 判断是否是全角字符（如中文、日文等）
        private bool IsFullWidthCharacter(System.Text.Rune r)
        {
            int value = r.Value;
            // 中文字符范围
            if (value >= 0x4E00 && value <= 0x9FFF) return true;  // CJK统一汉字
            if (value >= 0x3400 && value <= 0x4DBF) return true;  // CJK扩展A
            if (value >= 0x20000 && value <= 0x2A6DF) return true; // CJK扩展B
            if (value >= 0x2A700 && value <= 0x2B73F) return true; // CJK扩展C
            if (value >= 0x2B740 && value <= 0x2B81F) return true; // CJK扩展D
            if (value >= 0x2B820 && value <= 0x2CEAF) return true; // CJK扩展E
            if (value >= 0xF900 && value <= 0xFAFF) return true;  // CJK兼容汉字
        
            // 日文假名等
            if (value >= 0x3040 && value <= 0x309F) return true;  // 平假名
            if (value >= 0x30A0 && value <= 0x30FF) return true;  // 片假名
        
            // 全角标点和符号
            if (value >= 0xFF00 && value <= 0xFFEF) return true;  // 全角ASCII、全角标点
        
            // 其他全角字符
            if (value >= 0x3000 && value <= 0x303F) return true;  // CJK符号和标点
        
            return false;
        }

        private bool IsPositionSelected(int line, int column)
        {
            if (!HasSelection())
                return false;
                
            int startLine = Math.Min(_selectionStartLine, _selectionEndLine);
            int startColumn = startLine == _selectionStartLine ? _selectionStartColumn : _selectionEndColumn;
            int endLine = Math.Max(_selectionStartLine, _selectionEndLine);
            int endColumn = endLine == _selectionEndLine ? _selectionEndColumn : _selectionStartColumn;
            
            if (line < startLine || line > endLine)
                return false;
                
            if (line == startLine && line == endLine)
                return column >= startColumn && column < endColumn;
                
            if (line == startLine)
                return column >= startColumn;
                
            if (line == endLine)
                return column < endColumn;
                
            return true;
        }
        
        // 检查位置是否在选择区域内的辅助方法
        private bool IsPositionInSelection(Point position)
        {
            if (!HasSelection())
                return false;
                
            // 计算字体度量
            var typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretch);
            var formattedText = new FormattedText("M", System.Globalization.CultureInfo.CurrentCulture,
                FlowDirection.LeftToRight, typeface, FontSize, Brushes.Black, VisualTreeHelper.GetDpi(this).PixelsPerDip);
            double charWidth = formattedText.Width;
            double lineHeight = formattedText.Height;
            
            // 计算点击位置对应的行列
            int clickLine = Math.Max(0, Math.Min((int)(position.Y / lineHeight) + _scrollOffset, _lines.Count - 1));
            int clickColumn = Math.Max(0, (int)((position.X - 50) / charWidth)); // 50是行号区域宽度
            
            // 获取选择区域的起始和结束位置
            int startLine = Math.Min(_selectionStartLine, _selectionEndLine);
            int startColumn = startLine == _selectionStartLine ? _selectionStartColumn : _selectionEndColumn;
            int endLine = Math.Max(_selectionStartLine, _selectionEndLine);
            int endColumn = endLine == _selectionEndLine ? _selectionEndColumn : _selectionStartColumn;
            
            // 检查点击位置是否在选择区域内
            if (clickLine < startLine || clickLine > endLine)
                return false;
                
            if (clickLine == startLine && clickLine == endLine)
            {
                return clickColumn >= startColumn && clickColumn <= endColumn;
            }
            else if (clickLine == startLine)
            {
                return clickColumn >= startColumn;
            }
            else if (clickLine == endLine)
            {
                return clickColumn <= endColumn;
            }
            else
            {
                return true; // 在中间行
            }
        }
        private void SetCursorPositionFromPoint(Point point)
        {
            if (_lines.Count <= 0)
            {
                return;
            }

            // 计算字体度量
            double lineHeight = FontSize * 1.2;
            double defaultCharWidth = FontSize * 0.6; // 默认字符宽度
            
            // 计算行号区域宽度
            double lineNumberWidth = LineNumbersVisible ? 40 : 0;
            double textStartX = lineNumberWidth + 5; // 文本起始X坐标
            
            // 计算行号，考虑滚动偏移量
            int line = (int)(point.Y / lineHeight) + _scrollOffset;
            line = Math.Max(0, Math.Min(line, _lines.Count - 1));
            
            // 计算列号，考虑字符宽度
            double x = textStartX;
            int column = 0;
            var textLine = _lines[line];
            
            // 找到光标应该在的位置
            while (column < textLine.Characters.Count && x < point.X)
            {
                x += IsFullWidthCharacter(textLine.Characters[column].Character) ? defaultCharWidth * 2 : defaultCharWidth;
                if (x > point.X)
                {
                    // 如果点击位置在字符的前半部分，光标放在字符前面
                    // 如果在后半部分，光标放在字符后面
                    double charWidth = IsFullWidthCharacter(textLine.Characters[column].Character) ? defaultCharWidth * 2 : defaultCharWidth;
                    if (point.X > x - charWidth / 2)
                        column++;
                    break;
                }
                column++;
            }
            
            // 设置光标位置
            _cursorLine = line;
            _cursorColumn = column;
            
            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
        }
        private void HandleKeyDown(KeyEventArgs e)
        {
            if (IsReadOnly)
            {
                e.Handled = true;
                return;
            }
            
            // 处理组合键
            if (Keyboard.Modifiers == ModifierKeys.Control)
            {
                switch (e.Key)
                {
                    case Key.F:
                        ShowFindDialog();
                        e.Handled = true;
                        return;
                }
            }
            
            switch (e.Key)
            {
                case Key.Left:
                    if (_cursorColumn > 0)
                    {
                        _cursorColumn--;
                        showCurrChar();
                    }
                    else if (_cursorLine > 0)
                    {
                        _cursorLine--;
                        _cursorColumn = _lines[_cursorLine].Characters.Count;
                        showCurrChar();
                    }
                    break;
                    
                case Key.Right:
                    if (_cursorColumn < _lines[_cursorLine].Characters.Count)
                    {
                        _cursorColumn++;
                        showCurrChar();
                    }
                    else if (_cursorLine < _lines.Count - 1)
                    {
                        _cursorLine++;
                        _cursorColumn = 0;
                        showCurrChar();
                    }
                    break;
                    
                case Key.Up:
                    if (_cursorLine > 0)
                    {
                        _cursorLine--;
                        _cursorColumn = Math.Min(_cursorColumn, _lines[_cursorLine].Characters.Count);
                        
                        // 检查光标是否在可见区域内，如果不在则向上滚动一行
                        if (_cursorLine < _scrollOffset)
                        {
                            _scrollOffset--;
                        }
                        showCurrChar();
                    }
                    break;
                    
                case Key.Down:
                    if (_cursorLine < _lines.Count - 1)
                    {
                        _cursorLine++;
                        _cursorColumn = Math.Min(_cursorColumn, _lines[_cursorLine].Characters.Count);
                        
                        // 计算可见行数
                        double lineHeight = FontSize * 1.2;
                        int visibleLineCount = (int)(ActualHeight / lineHeight);
                        
                        // 检查光标是否在可见区域内，如果不在则向下滚动一行
                        if (_cursorLine >= _scrollOffset + visibleLineCount)
                        {
                            _scrollOffset++;
                        }
                        showCurrChar();
                    }
                    break;
                    
                case Key.Home:
                    _cursorColumn = 0;
                    break;
                    
                case Key.End:
                    _cursorColumn = _lines[_cursorLine].Characters.Count;
                    break;
                    
                case Key.Delete:
                    if (HasSelection())
                    {
                        DeleteSelection();
                    }
                    else if (_cursorColumn < _lines[_cursorLine].Characters.Count)
                    {
                        // 删除当前字符
                        TextCharacter c = _lines[_cursorLine].Characters[_cursorColumn];
                        if (c.guid != "")
                        {
                            _dic_deleted_char[c.guid] = c.Character.Value.ToString();
                        }
                        _lines[_cursorLine].Characters.RemoveAt(_cursorColumn);
                        _textChanged = true;
                        OnTextChanged();
                    }
                    else if (_cursorLine < _lines.Count - 1)
                    {
                        // 合并当前行和下一行
                        var nextLine = _lines[_cursorLine + 1];
                        _lines[_cursorLine].Characters.AddRange(nextLine.Characters);
                        _lines.RemoveAt(_cursorLine + 1);
                        _textChanged = true;
                        OnTextChanged();
                    }
                    break;
                    
                case Key.Back:
                    if (HasSelection())
                    {
                        DeleteSelection();
                    }
                    else if (_cursorColumn > 0)
                    {
                        // 删除前一个字符
                        _cursorColumn--;
                        TextCharacter c = _lines[_cursorLine].Characters[_cursorColumn];
                        if (c.guid != "")
                        {
                            _dic_deleted_char[c.guid] = c.Character.Value.ToString();
                        }
                        _lines[_cursorLine].Characters.RemoveAt(_cursorColumn);
                        _textChanged = true;
                        OnTextChanged();
                    }
                    else if (_cursorLine > 0)
                    {
                        // 合并当前行和上一行
                        _cursorColumn = _lines[_cursorLine - 1].Characters.Count;
                        _lines[_cursorLine - 1].Characters.AddRange(_lines[_cursorLine].Characters);
                        _lines.RemoveAt(_cursorLine);
                        _cursorLine--;
                        _textChanged = true;
                        OnTextChanged();
                    }
                    break;
                    
                case Key.Enter:
                    // 插入新行
                    var currentLine = _lines[_cursorLine];
                    var newLine = new TextLine();
                    
                    // 将当前行光标后的字符移到新行
                    if (_cursorColumn < currentLine.Characters.Count)
                    {
                        var remainingChars = currentLine.Characters.GetRange(_cursorColumn, currentLine.Characters.Count - _cursorColumn);
                        newLine.Characters.AddRange(remainingChars);
                        currentLine.Characters.RemoveRange(_cursorColumn, remainingChars.Count);
                    }
                    
                    _lines.Insert(_cursorLine + 1, newLine);
                    _cursorLine++;
                    _cursorColumn = 0;
                    _textChanged = true;
                    OnTextChanged();
                    break;
                    
                case Key.Tab:
                    // 插入Tab（空格）
                    for (int i = 0; i < TabSize; i++)
                    {
                        InsertText(" ");
                    }
                    break;
                    
                default:
                    e.Handled = false;
                    return;
            }
            
            // 如果按下Shift键，更新选择区域
            if (Keyboard.Modifiers == ModifierKeys.Shift)
            {
                UpdateSelection();
            }
            else
            {
                ClearSelection();
            }
            
            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
            
            // 重绘编辑器
            InvalidateVisual();
            
            e.Handled = true;
        }

        private void DeleteSelection()
        {
            if (!HasSelection())
                return;

            // 确保起始位置在结束位置之前
            int startLine = Math.Min(_selectionStartLine, _selectionEndLine);
            int startColumn = startLine == _selectionStartLine ? _selectionStartColumn : _selectionEndColumn;
            int endLine = Math.Max(_selectionStartLine, _selectionEndLine);
            int endColumn = endLine == _selectionEndLine ? _selectionEndColumn : _selectionStartColumn;

            if (startLine == endLine)
            {
                // 单行删除
                int start = Math.Min(startColumn, endColumn);
                int end = Math.Max(startColumn, endColumn);
                var line = _lines[startLine];
                if (start < line.Characters.Count)
                {
                    int length = Math.Min(end - start, line.Characters.Count - start);
                    line.Characters.RemoveRange(start, length);
                }
            }
            else
            {
                // 多行删除
                // 保留第一行开始部分
                var firstLine = _lines[startLine];
                if (startColumn < firstLine.Characters.Count)
                {
                    firstLine.Characters.RemoveRange(startColumn, firstLine.Characters.Count - startColumn);
                }

                // 保留最后一行结束部分
                var lastLine = _lines[endLine];
                List<TextCharacter> lastLineRemaining = new List<TextCharacter>();
                if (endColumn < lastLine.Characters.Count)
                {
                    lastLineRemaining = lastLine.Characters.GetRange(endColumn, lastLine.Characters.Count - endColumn);
                }

                // 删除中间行
                _lines.RemoveRange(startLine + 1, endLine - startLine);

                // 将最后一行剩余部分添加到第一行
                firstLine.Characters.AddRange(lastLineRemaining);
            }

            // 设置光标位置到选择的开始位置
            _cursorLine = startLine;
            _cursorColumn = startColumn;

            // 清除选择
            ClearSelection();
            
            // 标记文本已更改
            _textChanged = true;
            
            // 触发文本改变事件
            OnTextChanged();
            
            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
        }

        public string GetSelectedText()
        {
            if (!HasSelection())
                return string.Empty;

            // 确保起始位置在结束位置之前
            int startLine = Math.Min(_selectionStartLine, _selectionEndLine);
            int startColumn = startLine == _selectionStartLine ? _selectionStartColumn : _selectionEndColumn;
            int endLine = Math.Max(_selectionStartLine, _selectionEndLine);
            int endColumn = endLine == _selectionEndLine ? _selectionEndColumn : _selectionStartColumn;

            if (startLine == endLine)
            {
                // 单行选择
                int start = Math.Min(startColumn, endColumn);
                int end = Math.Max(startColumn, endColumn);
                var line = _lines[startLine];
                if (start < line.Characters.Count)
                {
                    int length = Math.Min(end - start, line.Characters.Count - start);
                    return string.Concat(line.Characters.GetRange(start, length).Select(c => c.Character.ToString()));
                }
                return string.Empty;
            }
            else
            {
                // 多行选择
                StringBuilder sb = new StringBuilder();

                // 第一行
                var firstLine = _lines[startLine];
                if (startColumn < firstLine.Characters.Count)
                {
                    sb.Append(string.Concat(firstLine.Characters.GetRange(startColumn, firstLine.Characters.Count - startColumn).Select(c => c.Character.ToString())));
                }
                sb.Append("\n");

                // 中间行
                for (int i = startLine + 1; i < endLine; i++)
                {
                    sb.Append(string.Concat(_lines[i].Characters.Select(c => c.Character.ToString())));
                    sb.Append("\n");
                }

                // 最后一行
                var lastLine = _lines[endLine];
                if (endColumn > 0 && lastLine.Characters.Count > 0)
                {
                    sb.Append(string.Concat(lastLine.Characters.GetRange(0, Math.Min(endColumn, lastLine.Characters.Count)).Select(c => c.Character.ToString())));
                }

                return sb.ToString();
            }
        }
        
        private List<TextCharacter> GetSelectedTextCharacters()
        {
            if (!HasSelection())
                return new List<TextCharacter>();

            // 确保起始位置在结束位置之前
            int startLine = Math.Min(_selectionStartLine, _selectionEndLine);
            int startColumn = startLine == _selectionStartLine ? _selectionStartColumn : _selectionEndColumn;
            int endLine = Math.Max(_selectionStartLine, _selectionEndLine);
            int endColumn = endLine == _selectionEndLine ? _selectionEndColumn : _selectionStartColumn;

            List<TextCharacter> result = new List<TextCharacter>();
            
            if (startLine == endLine)
            {
                // 单行选择
                int start = Math.Min(startColumn, endColumn);
                int end = Math.Max(startColumn, endColumn);
                var line = _lines[startLine];
                if (start < line.Characters.Count)
                {
                    int length = Math.Min(end - start, line.Characters.Count - start);
                    result.AddRange(line.Characters.GetRange(start, length));
                }
            }
            else
            {
                // 多行选择
                // 第一行
                var firstLine = _lines[startLine];
                if (startColumn < firstLine.Characters.Count)
                {
                    result.AddRange(firstLine.Characters.GetRange(startColumn, firstLine.Characters.Count - startColumn));
                }
                
                // 中间行
                for (int i = startLine + 1; i < endLine; i++)
                {
                    result.AddRange(_lines[i].Characters);
                }
                
                // 最后一行
                var lastLine = _lines[endLine];
                if (endColumn > 0 && lastLine.Characters.Count > 0)
                {
                    result.AddRange(lastLine.Characters.GetRange(0, Math.Min(endColumn, lastLine.Characters.Count)));
                }
            }
            
            return result;
        }

        private bool HasSelection()
        {
            // 判断是否有选中的文本
            return _selectionStartLine >= 0 && _selectionEndLine >= 0;
        }

        private bool IsSingleSelection()
        {
            if (_selectionStartColumn >= 0  && _selectionEndColumn >= 0)
            {
                return _selectionStartColumn + 1 == _selectionEndColumn;
            }

            return false;
        }

        public void ClearSelection()
        {
            // 清除选择
            _selectionStartLine = -1;
            _selectionStartColumn = -1;
            _selectionEndLine = -1;
            _selectionEndColumn = -1;
        }

        private void UpdateSelection()
        {
            // 更新选择区域
            if (_selectionStartLine < 0)
            {
                _selectionStartLine = _cursorLine;
                _selectionStartColumn = _cursorColumn;
            }
            _selectionEndLine = _cursorLine;
            _selectionEndColumn = _cursorColumn;
        }

        private void SelectAll()
        {
            // 全选
            _selectionStartLine = 0;
            _selectionStartColumn = 0;
            _selectionEndLine = _lines.Count - 1;
            _selectionEndColumn = _lines[_selectionEndLine].Characters.Count;
        }

        private bool CanUndo()
        {
            // 判断是否可以撤销
            return _undoIndex >= 0;
        }

        private bool CanRedo()
        {
            // 判断是否可以重做
            return _undoIndex < _undoBuffer.Count - 1;
        }

        private void Undo()
        {
            if (!CanUndo())
                return;

            var action = _undoBuffer[_undoIndex];

            // 恢复光标位置到操作前
            _cursorLine = action.CursorBeforeLine;
            _cursorColumn = action.CursorBeforeColumn;

            // 如果有添加的文本，需要删除它
            if (!string.IsNullOrEmpty(action.AddedText))
            {
                // 设置选择区域为添加的文本
                _selectionStartLine = action.AddedStartLine;
                _selectionStartColumn = action.AddedStartColumn;
                _selectionEndLine = action.AddedEndLine;
                _selectionEndColumn = action.AddedEndColumn;

                // 删除添加的文本
                DeleteSelection();
            }

            // 如果有删除的文本，需要恢复它
            if (!string.IsNullOrEmpty(action.RemovedText))
            {
                // 设置光标位置到删除的起始位置
                _cursorLine = action.RemovedStartLine;
                _cursorColumn = action.RemovedStartColumn;

                // 插入被删除的文本
                InsertText(action.RemovedText);

                // 恢复光标位置
                _cursorLine = action.CursorBeforeLine;
                _cursorColumn = action.CursorBeforeColumn;
            }

            // 清除选择
            ClearSelection();

            // 更新撤销索引
            _undoIndex--;

            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
        }

        private void Redo()
        {
            if (!CanRedo())
                return;

            // 更新撤销索引
            _undoIndex++;

            var action = _undoBuffer[_undoIndex];

            // 恢复光标位置到操作前
            _cursorLine = action.CursorBeforeLine;
            _cursorColumn = action.CursorBeforeColumn;

            // 如果有删除的文本，需要再次删除它
            if (!string.IsNullOrEmpty(action.RemovedText))
            {
                // 设置选择区域为删除的文本
                _selectionStartLine = action.RemovedStartLine;
                _selectionStartColumn = action.RemovedStartColumn;
                _selectionEndLine = action.RemovedEndLine;
                _selectionEndColumn = action.RemovedEndColumn;

                // 删除文本
                DeleteSelection();
            }

            // 如果有添加的文本，需要再次添加它
            if (!string.IsNullOrEmpty(action.AddedText))
            {
                // 设置光标位置到添加的起始位置
                _cursorLine = action.AddedStartLine;
                _cursorColumn = action.AddedStartColumn;

                // 插入文本
                InsertText(action.AddedText);
            }

            // 恢复光标位置到操作后
            _cursorLine = action.CursorAfterLine;
            _cursorColumn = action.CursorAfterColumn;

            // 清除选择
            ClearSelection();

            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);
        }

        #endregion

        public event EventHandler TextChanged;
        public event EventHandler<CursorPositionChangedEventArgs> CursorPositionChanged;

        public virtual void OnTextChanged()
        {
            // 从_lines集合构建文本并更新TextProperty
            UpdateTextProperty();
            
            TextChanged?.Invoke(this, EventArgs.Empty);
        }

        private void UpdateTextProperty()
        {
            // 从_lines集合构建完整的文本
            StringBuilder sb = new StringBuilder();
            
            for (int i = 0; i < _lines.Count; i++)
            {
                sb.Append(string.Concat(_lines[i].Characters.Select(c => c.Character.ToString())));
                
                // 除了最后一行，每行后面都添加换行符
                if (i < _lines.Count - 1)
                    sb.Append("\n");
            }
            
            // 保存当前光标位置
            int savedCursorLine = _cursorLine;
            int savedCursorColumn = _cursorColumn;
            bool textChangedFlag = _textChanged;
            
            // 更新TextProperty，但不触发OnTextChanged回调
            SetValue(TextProperty, sb.ToString());
            
            // 恢复光标位置
            _cursorLine = savedCursorLine;
            _cursorColumn = savedCursorColumn;
            _textChanged = textChangedFlag;
        }

        public virtual void OnCursorPositionChanged(int line, int column)
        {
            CursorPositionChanged?.Invoke(this, new CursorPositionChangedEventArgs(line, column));
        }

        // 获取光标后面的第一个字符
        private TextCharacter GetCharacterAfterCursor()
        {
            if (_cursorLine >= 0 && _cursorLine < _lines.Count)
            {
                var line = _lines[_cursorLine];
                if (_cursorColumn >= 0 && _cursorColumn < line.Characters.Count)
                {
                    // 返回光标位置的字符（即光标后面的第一个字符）
                    return line.Characters[_cursorColumn];
                }
                else if (_cursorColumn == line.Characters.Count && _cursorLine + 1 < _lines.Count)
                {
                    // 如果光标在行尾，返回下一行的第一个字符
                    //var nextLine = _lines[_cursorLine + 1];
                    //if (nextLine.Characters.Count > 0)
                    //{
                    //    return nextLine.Characters[0];
                    //}
                    return null;
                }
            }
            return null; // 如果没有找到字符，返回null
        }

        private TextCharacter GetCharacterBeforeCursor()
        {
            if (_cursorLine >= 0 && _cursorLine < _lines.Count)
            {
                var line = _lines[_cursorLine];
                if (_cursorColumn > 0 && _cursorColumn <= line.Characters.Count)
                {
                    // 返回光标位置的字符（即光标后面的第一个字符）
                    return line.Characters[_cursorColumn - 1];
                }
                else
                {
                    return null;
                }
            }
            return null; // 如果没有找到字符，返回null
        }

        public void InsertText(string text)
        {
            if (string.IsNullOrEmpty(text))
                return;

            // 如果有选中的文本，先删除或修改它
            if (HasSelection())
            {
                if ( IsSingleSelection() )  // 选中了单个字符
                {
                    if (text.Length == 1)
                    {
                        // 此处是修改单个字符的情况
                        var line = _lines[_cursorLine];
                        TextCharacter c = line.Characters[_cursorColumn-1];
                        c.Character = System.Text.Rune.GetRuneAt(text, 0); // 修改字符

                        // 清除选择
                        ClearSelection();

                        _cursorColumn = _cursorColumn - 1;
                        // 触发光标位置改变事件
                        OnCursorPositionChanged(_cursorLine, _cursorColumn);

                        // 重绘编辑器
                        InvalidateVisual();

                        return;
                    }


                }

                DeleteSelection();
            }

            // 记录撤销操作
            var undoAction = new UndoAction
            {
                CursorBeforeLine = _cursorLine,
                CursorBeforeColumn = _cursorColumn
            };

            // 处理多行文本
            var lines = text.Replace("\r\n", "\n").Replace("\r", "\n").Split('\n');

            if (lines.Length == 1)
            {
                // 单行文本
                var line = _lines[_cursorLine];
                var chars = lines[0].EnumerateRunes().Select(r => new TextCharacter(r)).ToList();
                line.Characters.InsertRange(_cursorColumn, chars);
                _cursorColumn += chars.Count;

                // 记录添加的文本信息
                undoAction.AddedText = text;
                undoAction.AddedStartLine = _cursorLine;
                undoAction.AddedStartColumn = _cursorColumn - chars.Count;
                undoAction.AddedEndLine = _cursorLine;
                undoAction.AddedEndColumn = _cursorColumn;
            }
            else
            {
                // 多行文本
                var currentLine = _lines[_cursorLine];
                var remainingChars = currentLine.Characters.GetRange(_cursorColumn, currentLine.Characters.Count - _cursorColumn).ToList();
                currentLine.Characters.RemoveRange(_cursorColumn, remainingChars.Count);

                // 添加第一行
                var firstLineChars = lines[0].EnumerateRunes().Select(r => new TextCharacter(r)).ToList();
                currentLine.Characters.AddRange(firstLineChars);

                // 添加中间行
                for (int i = 1; i < lines.Length - 1; i++)
                {
                    var newLine = new TextLine();
                    newLine.Characters.AddRange(lines[i].EnumerateRunes().Select(r => new TextCharacter(r)));
                    _lines.Insert(_cursorLine + i, newLine);
                }

                // 添加最后一行和剩余字符
                var lastLine = new TextLine();
                lastLine.Characters.AddRange(lines[lines.Length - 1].EnumerateRunes().Select(r => new TextCharacter(r)));
                lastLine.Characters.AddRange(remainingChars);
                _lines.Insert(_cursorLine + lines.Length - 1, lastLine);

                // 更新光标位置
                _cursorLine += lines.Length - 1;
                _cursorColumn = lastLine.Characters.Count - remainingChars.Count;

                // 记录添加的文本信息
                undoAction.AddedText = text;
                undoAction.AddedStartLine = _cursorLine - (lines.Length - 1);
                undoAction.AddedStartColumn = _cursorColumn - firstLineChars.Count;
                undoAction.AddedEndLine = _cursorLine;
                undoAction.AddedEndColumn = _cursorColumn;
            }

            // 记录撤销操作后的光标位置
            undoAction.CursorAfterLine = _cursorLine;
            undoAction.CursorAfterColumn = _cursorColumn;

            // 添加到撤销缓冲区
            if (_undoIndex < _undoBuffer.Count - 1)
            {
                _undoBuffer.RemoveRange(_undoIndex + 1, _undoBuffer.Count - _undoIndex - 1);
            }
            _undoBuffer.Add(undoAction);
            _undoIndex = _undoBuffer.Count - 1;

            // 标记文本已更改
            _textChanged = true;

            // 触发文本改变事件
            OnTextChanged();

            // 触发光标位置改变事件
            OnCursorPositionChanged(_cursorLine, _cursorColumn);

            // 重绘编辑器
            InvalidateVisual();
        }

        #region 查找功能

        /// <summary>
        /// 显示查找对话框
        /// </summary>
        public void ShowFindDialog()
        {
            if (_findDialog == null || !_findDialog.IsLoaded)
            {
                _findDialog = new FindDialog(this);
                _findDialog.Owner = Window.GetWindow(this);
            }
            
            _findDialog.Show();
            _findDialog.Activate();
        }

        /// <summary>
        /// 获取当前选中的文本
        /// </summary>
        /// <returns></returns>
        //public string GetSelectedText()
        //{
        //    if (!HasSelection())
        //        return string.Empty;

        //    var selectedChars = GetSelectedTextCharacters();
        //    return string.Join("", selectedChars.Select(c => c.Character.ToString()));
        //}

        /// <summary>
        /// 查找下一个匹配项
        /// </summary>
        /// <param name="searchText">要查找的文本</param>
        /// <param name="matchCase">是否区分大小写</param>
        /// <param name="wholeWord">是否全字匹配</param>
        /// <returns>是否找到</returns>
        public bool FindNext(string searchText, bool matchCase, bool wholeWord)
        {
            if (string.IsNullOrEmpty(searchText))
                return false;

            // 如果搜索条件改变，重新搜索
            if (searchText != _lastSearchText || matchCase != _lastMatchCase || wholeWord != _lastWholeWord)
            {
                SearchAll(searchText, matchCase, wholeWord);
            }

            if (_findResults.Count == 0)
                return false;

            // 找到下一个匹配项
            _currentFindIndex = (_currentFindIndex + 1) % _findResults.Count;
            var result = _findResults[_currentFindIndex];
            
            // 移动光标到匹配位置
            _cursorLine = result.line;
            _cursorColumn = result.column;
            
            // 设置选择区域
            _selectionStartLine = result.line;
            _selectionStartColumn = result.column;
            _selectionEndLine = result.line;
            _selectionEndColumn = result.column + result.length;

            // 确保匹配项在可见区域内
            EnsureCursorVisible();
            
            // 重绘编辑器
            InvalidateVisual();
            
            return true;
        }

        /// <summary>
        /// 查找上一个匹配项
        /// </summary>
        /// <param name="searchText">要查找的文本</param>
        /// <param name="matchCase">是否区分大小写</param>
        /// <param name="wholeWord">是否全字匹配</param>
        /// <returns>是否找到</returns>
        public bool FindPrevious(string searchText, bool matchCase, bool wholeWord)
        {
            if (string.IsNullOrEmpty(searchText))
                return false;

            // 如果搜索条件改变，重新搜索
            if (searchText != _lastSearchText || matchCase != _lastMatchCase || wholeWord != _lastWholeWord)
            {
                SearchAll(searchText, matchCase, wholeWord);
            }

            if (_findResults.Count == 0)
                return false;

            // 找到上一个匹配项
            _currentFindIndex = (_currentFindIndex - 1 + _findResults.Count) % _findResults.Count;
            var result = _findResults[_currentFindIndex];
            
            // 移动光标到匹配位置
            _cursorLine = result.line;
            _cursorColumn = result.column;
            
            // 设置选择区域
            _selectionStartLine = result.line;
            _selectionStartColumn = result.column;
            _selectionEndLine = result.line;
            _selectionEndColumn = result.column + result.length;

            // 确保匹配项在可见区域内
            EnsureCursorVisible();
            
            // 重绘编辑器
            InvalidateVisual();
            
            return true;
        }

        /// <summary>
        /// 搜索所有匹配项
        /// </summary>
        /// <param name="searchText">要查找的文本</param>
        /// <param name="matchCase">是否区分大小写</param>
        /// <param name="wholeWord">是否全字匹配</param>
        private void SearchAll(string searchText, bool matchCase, bool wholeWord)
        {
            _findResults.Clear();
            _currentFindIndex = -1;
            _lastSearchText = searchText;
            _lastMatchCase = matchCase;
            _lastWholeWord = wholeWord;

            if (string.IsNullOrEmpty(searchText))
                return;

            StringComparison comparison = matchCase ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;

            for (int lineIndex = 0; lineIndex < _lines.Count; lineIndex++)
            {
                var line = _lines[lineIndex];
                string lineText = string.Join("", line.Characters.Select(c => c.Character.ToString()));

                int startIndex = 0;
                while (startIndex < lineText.Length)
                {
                    int foundIndex = lineText.IndexOf(searchText, startIndex, comparison);
                    if (foundIndex == -1)
                        break;

                    // 检查全字匹配
                    if (wholeWord)
                    {
                        bool isWholeWord = true;
                        
                        // 检查前一个字符
                        if (foundIndex > 0)
                        {
                            char prevChar = lineText[foundIndex - 1];
                            if (char.IsLetterOrDigit(prevChar) || prevChar == '_')
                                isWholeWord = false;
                        }
                        
                        // 检查后一个字符
                        if (foundIndex + searchText.Length < lineText.Length)
                        {
                            char nextChar = lineText[foundIndex + searchText.Length];
                            if (char.IsLetterOrDigit(nextChar) || nextChar == '_')
                                isWholeWord = false;
                        }
                        
                        if (!isWholeWord)
                        {
                            startIndex = foundIndex + 1;
                            continue;
                        }
                    }

                    _findResults.Add((lineIndex, foundIndex, searchText.Length));
                    startIndex = foundIndex + 1;
                }
            }

            // 找到当前光标位置之后的第一个匹配项
            for (int i = 0; i < _findResults.Count; i++)
            {
                var result = _findResults[i];
                if (result.line > _cursorLine || 
                    (result.line == _cursorLine && result.column >= _cursorColumn))
                {
                    _currentFindIndex = i - 1; // 设置为前一个，因为FindNext会+1
                    return;
                }
            }
            
            // 如果没找到，设置为最后一个
            if (_findResults.Count > 0)
                _currentFindIndex = _findResults.Count - 1;
        }

        /// <summary>
        /// 确保光标在可见区域内
        /// </summary>
        private void EnsureCursorVisible()
        {
            double lineHeight = FontSize * 1.2;
            int visibleLineCount = (int)(ActualHeight / lineHeight);
            
            // 如果光标在可见区域上方
            if (_cursorLine < _scrollOffset)
            {
                _scrollOffset = _cursorLine;
            }
            // 如果光标在可见区域下方
            else if (_cursorLine >= _scrollOffset + visibleLineCount)
            {
                _scrollOffset = _cursorLine - visibleLineCount + 1;
            }
            
            // 确保滚动偏移量不为负数
            _scrollOffset = Math.Max(0, _scrollOffset);
        }

        /// <summary>
        /// 清除查找高亮
        /// </summary>
        public void ClearFindHighlight()
        {
            _findResults.Clear();
            _currentFindIndex = -1;
            InvalidateVisual();
        }

        #endregion

    }

    [Serializable]
    public class TextCharacter
    {
        [JsonIgnore]
        public System.Text.Rune Character { get; set; }                                      // 对应图中的原始字符
        
        // 用于 JSON 序列化的属性
        [JsonProperty("Character")]
        public int CharacterValue
        {
            get => Character.Value;
            set => Character = new System.Text.Rune(value);
        }
        
        public Brush Foreground { get; set; } = Brushes.Black;
        public bool IsComment { get; set; } = false;
        public bool IsKeyword { get; set; } = false;
        public bool IsString { get; set; } = false;
        public bool IsNumber { get; set; } = false;

        // 字符在图片上的坐标和宽高
        public int x { get; set; } = -1;
        public int y { get; set; } = -1;
        public int w { get; set; } = -1;
        public int h { get; set; } = -1;
        
        public string ImageMD5 { get; set; } = "";
        public string guid { get; set; } = "";

        // 添加无参构造函数用于JSON反序列化
        public TextCharacter()
        {
        }

        public TextCharacter(System.Text.Rune c)
        {
            Character = c;
        }

        public TextCharacter(System.Text.Rune c, string guid, int x, int y, int w, int h, string imageMd5)
        {
            Character = c;
            this.guid = guid;
            this.x = x;
            this.y = y;
            this.w = w;
            this.h = h;
            ImageMD5 = imageMd5;
        }

        // 添加一个接受char的构造函数，方便兼容现有代码
        public TextCharacter(char c)
        {
            Character = new System.Text.Rune(c);
        }
    }

    public class TextLine
    {
        public TextLine()
        {

        }

        public TextLine(JArray po, JObject rectange)
        {
            this.pos = po;
            this.selected_rectange = rectange;
        }

        public JArray pos { get; set; } = new JArray();
        public JObject selected_rectange { get; set; } = new JObject();

        public List<TextCharacter> Characters { get; set; } = new List<TextCharacter>();
    }

    public class UndoAction
    {
        public string AddedText { get; set; } = string.Empty;
        public int AddedStartLine { get; set; }
        public int AddedStartColumn { get; set; }
        public int AddedEndLine { get; set; }
        public int AddedEndColumn { get; set; }

        public string RemovedText { get; set; } = string.Empty;
        public int RemovedStartLine { get; set; }
        public int RemovedStartColumn { get; set; }
        public int RemovedEndLine { get; set; }
        public int RemovedEndColumn { get; set; }

        public int CursorBeforeLine { get; set; }
        public int CursorBeforeColumn { get; set; }
        public int CursorAfterLine { get; set; }
        public int CursorAfterColumn { get; set; }
    }
   
}