private static void OnShowLineNumbersChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
TextEditor editor = (TextEditor)d;
var leftMargins = editor.TextArea.LeftMargins;
if ((bool)e.NewValue)
{
LineNumberMargin lineNumbers = new LineNumberMargin();
Line line = (Line)DottedLineMargin.Create();
leftMargins.Insert(0, lineNumbers);
leftMargins.Insert(1, line);
var lineNumbersForeground = new Binding("LineNumbersForeground")
{
Source = editor
};
line.SetBinding(Line.StrokeProperty, lineNumbersForeground);
lineNumbers.SetBinding(Control.ForegroundProperty, lineNumbersForeground);
}
else
{
for (int i = 0; i < leftMargins.Count; i++)
{
if (leftMargins[i] is LineNumberMargin)
{
leftMargins.RemoveAt(i);
if (i < leftMargins.Count && DottedLineMargin.IsDottedLineMargin(leftMargins[i]))
{
leftMargins.RemoveAt(i);
}
break;
}
}
}
}
public CodeTextEditor()
{
Options = new TextEditorOptions
{
ConvertTabsToSpaces = true,
AllowScrollBelowDocument = true,
IndentationSize = 4,
EnableEmailHyperlinks = false,
};
// TODO: remove this after bug fix
#if AVALONIA
var lineMargin = new LineNumberMargin {
Margin = new Thickness(0, 0, 10, 0)
};
lineMargin[~TextBlock.ForegroundProperty] = this[~LineNumbersForegroundProperty];
TextArea.LeftMargins.Insert(0, lineMargin);
#else
ShowLineNumbers = true;
#endif
TextArea.TextView.VisualLinesChanged += OnVisualLinesChanged;
TextArea.TextEntering += OnTextEntering;
TextArea.TextEntered += OnTextEntered;
#if AVALONIA
PointerHover += OnMouseHover;
PointerHoverStopped += OnMouseHoverStopped;
#else
MouseHover += OnMouseHover;
MouseHoverStopped += OnMouseHoverStopped;
ToolTipService.SetInitialShowDelay(this, 0);
SearchReplacePanel.Install(this);
#endif
var commandBindings = TextArea.CommandBindings;
var deleteLineCommand = commandBindings.OfType <CommandBinding>().FirstOrDefault(x =>
x.Command == AvalonEditCommands.DeleteLine);
if (deleteLineCommand != null)
{
commandBindings.Remove(deleteLineCommand);
}
var contextMenu = new ContextMenu();
contextMenu.SetItems(new[]
{
new MenuItem {
Command = ApplicationCommands.Cut
},
new MenuItem {
Command = ApplicationCommands.Copy
},
new MenuItem {
Command = ApplicationCommands.Paste
}
});
ContextMenu = contextMenu;
}
// using a method to ensure the local variables can be garbage collected after the method returns
void DocumentDoesNotHoldReferenceToLineMargin_CreateMargin(TextDocument textDocument, Action finalizeAction)
{
TextView textView = new TextViewWithGCCallback(finalizeAction)
{
Document = textDocument
};
LineNumberMargin margin = new LineNumberMargin()
{
TextView = textView
};
}
partial void Initialize()
{
var lineMargin = new LineNumberMargin {
Margin = new Thickness(0, 0, 10, 0)
};
lineMargin[~TextBlock.ForegroundProperty] = this[~LineNumbersForegroundProperty];
TextArea.LeftMargins.Insert(0, lineMargin);
PointerHover += OnMouseHover;
PointerHoverStopped += OnMouseHoverStopped;
}
WeakReference DocumentDoesNotHoldReferenceToLineMargin_CreateMargin(TextDocument textDocument)
{
TextView textView = new TextView()
{
Document = textDocument
};
LineNumberMargin margin = new LineNumberMargin()
{
TextView = textView
};
return(new WeakReference(textView));
}
private static void addLineNumberMarching(TextEditor _editor, LineNumberMargin lineNumbers)
{
var leftMargins = _editor.TextArea.LeftMargins;
Line line = (Line)DottedLineMargin.Create();
leftMargins.Insert(0, lineNumbers);
leftMargins.Insert(1, line);
var lineNumbersForeground = new Binding("LineNumbersForeground")
{
Source = _editor
};
line.SetBinding(Line.StrokeProperty, lineNumbersForeground);
lineNumbers.SetBinding(Control.ForegroundProperty, lineNumbersForeground);
}
public MainWindow()
{
InitializeComponent();
this.AttachDevTools();
_textEditor = this.FindControl <TextEditor>("Editor");
_textEditor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinition("C#");
_textEditor.TextArea.TextEntering += textEditor_TextArea_TextEntering;
_textEditor.TextArea.TextEntered += textEditor_TextArea_TextEntered;
var lineNumberMargin = new LineNumberMargin {
Margin = new Thickness(0, 0, 10, 0)
};
TextBlock.SetForeground(lineNumberMargin, Brushes.Gray);
_textEditor.TextArea.LeftMargins.Add(lineNumberMargin);
_textEditor.TextArea.IndentationStrategy = new Indentation.CSharp.CSharpIndentationStrategy( );
}
public TextViewerControl()
{
InitializeComponent();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
textEditor.FontFamily = "Consolas";
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
textEditor.FontFamily = "Menlo";
}
else
{
textEditor.FontFamily = "Monospace";
}
// TOOD: add
//SearchPanel.Install(textEditor.TextArea);
// TODO: remove this after bug fix
var lineMargin = new LineNumberMargin {
Margin = new Thickness(0, 0, 10, 0)
};
lineMargin[~TextBlock.ForegroundProperty] = textEditor[~TextEditor.LineNumbersForegroundProperty];
textEditor.TextArea.LeftMargins.Insert(0, lineMargin);
textEditor.TextArea.PointerPressed += TextAreaMouseRightButtonDown;
var textView = textEditor.TextArea.TextView;
textView.CurrentLineBackground = new SolidColorBrush(Color.FromRgb(224, 224, 224));
textView.CurrentLineBorder = new Pen(Brushes.Transparent, 0);
//textView.Options.HighlightCurrentLine = true;
textView.Options.EnableEmailHyperlinks = false;
textView.Options.EnableHyperlinks = false;
textEditor.IsReadOnly = true;
}
public TextArea(TextEditor editor)
{
this.editor = editor;
CanGetFocus = true;
lineNumberMargin = new LineNumberMargin(editor);
paddingMargin = new PaddingMargin(5);
textViewMargin = new TextViewMargin(editor);
margins.Add(lineNumberMargin);
margins.Add(paddingMargin);
margins.Add(textViewMargin);
contextMenu = new Menu();
cutMenuItem = new MenuItem("Cut");
cutMenuItem.Clicked += (sender, e) => Cut();
contextMenu.Items.Add(cutMenuItem);
copyMenuItem = new MenuItem("Copy");
copyMenuItem.Clicked += (sender, e) => Copy();
contextMenu.Items.Add(copyMenuItem);
pasteMenuItem = new MenuItem("Paste");
pasteMenuItem.Clicked += (sender, e) => Paste();
contextMenu.Items.Add(pasteMenuItem);
contextMenu.Items.Add(new SeparatorMenuItem());
selectallMenuItem = new MenuItem("Select All");
selectallMenuItem.Clicked += (sender, e) => SelectAll();
contextMenu.Items.Add(selectallMenuItem);
ButtonPressed += HandleButtonPressed;
}
