+++ /dev/null
-//
-// ScrollingTextBox.cs
-//
-// Author:
-// Jean-Philippe Bruyère <jp.bruyere@hotmail.com>
-//
-// Copyright (c) 2013-2017 Jean-Philippe Bruyère
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-using System;
-using System.Xml.Serialization;
-using System.ComponentModel;
-using System.Collections;
-using Cairo;
-using System.Text;
-using System.Collections.Generic;
-using System.Text.RegularExpressions;
-using System.Linq;
-
-namespace Crow
-{
- /// <summary>
- /// Scrolling text box optimized for monospace fonts, for coding
- /// </summary>
- public class ScrollingTextBox : ScrollingObject
- {
- #region CTOR
- protected ScrollingTextBox ():base()
- {
- KeyEventsOverrides = true;
- }
- public ScrollingTextBox (Interface iface):base(iface){
- KeyEventsOverrides = true;
- }
- #endregion
-
- public event EventHandler TextChanged;
-
- public virtual void OnTextChanged(Object sender, EventArgs e)
- {
- TextChanged.Raise (this, e);
- }
-
- #region private and protected fields
- string lineBreak = Interface.LineBreak;
- int visibleLines = 1;
- List<string> lines;
- string _text = "label";
- Color selBackground;
- Color selForeground;
- Point mouseLocalPos = 0;//mouse coord in widget space
- int _currentCol; //0 based cursor position in string
- int _currentLine;
- Point _selBegin = -1; //selection start (row,column)
- Point _selRelease = -1; //selection end (row,column)
-
- protected Rectangle rText;
- protected FontExtents fe;
- protected TextExtents te;
- #endregion
-
- [XmlAttributeAttribute][DefaultValue("label")]
- public string Text
- {
- get {
- return lines == null ?
- _text : lines.Aggregate((i, j) => i + Interface.LineBreak + j);
- }
- set
- {
- if (string.Equals (value, _text, StringComparison.Ordinal))
- return;
-
- _text = value;
-
- if (string.IsNullOrEmpty(_text))
- _text = "";
-
- lines = getLines;
- MaxScrollY = Math.Max (0, lines.Count - visibleLines);
-
- OnTextChanged (this, null);
- RegisterForGraphicUpdate ();
- }
- }
-
-
- [XmlAttributeAttribute][DefaultValue("BlueGray")]
- public virtual Color SelectionBackground {
- get { return selBackground; }
- set {
- if (value == selBackground)
- return;
- selBackground = value;
- NotifyValueChanged ("SelectionBackground", selBackground);
- RegisterForRedraw ();
- }
- }
- [XmlAttributeAttribute][DefaultValue("White")]
- public virtual Color SelectionForeground {
- get { return selForeground; }
- set {
- if (value == selForeground)
- return;
- selForeground = value;
- NotifyValueChanged ("SelectionForeground", selForeground);
- RegisterForRedraw ();
- }
- }
- [XmlAttributeAttribute][DefaultValue(0)]
- public int CurrentColumn{
- get { return _currentCol; }
- set {
- if (value == _currentCol)
- return;
- if (value < 0)
- _currentCol = 0;
- else if (value > lines [_currentLine].Length)
- _currentCol = lines [_currentLine].Length;
- else
- _currentCol = value;
- NotifyValueChanged ("CurrentColumn", _currentCol);
- }
- }
- [XmlAttributeAttribute][DefaultValue(0)]
- public int CurrentLine{
- get { return _currentLine; }
- set {
- if (value == _currentLine)
- return;
- if (value >= lines.Count)
- _currentLine = lines.Count-1;
- else if (value < 0)
- _currentLine = 0;
- else
- _currentLine = value;
- //force recheck of currentCol for bounding
- int cc = _currentCol;
- _currentCol = 0;
- CurrentColumn = cc;
- NotifyValueChanged ("CurrentLine", _currentLine);
-
- if (CurrentLine < ScrollY)
- ScrollY = CurrentLine;
- else if (CurrentLine >= ScrollY + visibleLines)
- ScrollY = Math.Max (0, CurrentLine - visibleLines + 1);
- }
- }
- [XmlIgnore]public Point CurrentPosition {
- get { return new Point(CurrentColumn, CurrentLine); }
- }
- //TODO:using HasFocus for drawing selection cause SelBegin and Release binding not to work
- /// <summary>
- /// Selection begin position in char units (line, column)
- /// </summary>
- [XmlAttributeAttribute][DefaultValue("-1")]
- public Point SelBegin {
- get { return _selBegin; }
- set {
- if (value == _selBegin)
- return;
- _selBegin = value;
- System.Diagnostics.Debug.WriteLine ("SelBegin=" + _selBegin);
- NotifyValueChanged ("SelBegin", _selBegin);
- NotifyValueChanged ("SelectedText", SelectedText);
- }
- }
- /// <summary>
- /// Selection release position in char units (line, column)
- /// </summary>
- [XmlAttributeAttribute][DefaultValue("-1")]
- public Point SelRelease {
- get {
- return _selRelease;
- }
- set {
- if (value == _selRelease)
- return;
- _selRelease = value;
- NotifyValueChanged ("SelRelease", _selRelease);
- NotifyValueChanged ("SelectedText", SelectedText);
- }
- }
- /// <summary>
- /// return char at CurrentLine, CurrentColumn
- /// </summary>
- [XmlIgnore]protected Char CurrentChar
- {
- get {
- return lines [CurrentLine] [CurrentColumn];
- }
- }
- /// <summary>
- /// ordered selection start and end positions in char units
- /// </summary>
- [XmlIgnore]protected Point selectionStart
- {
- get {
- return SelRelease < 0 || SelBegin.Y < SelRelease.Y ? SelBegin :
- SelBegin.Y > SelRelease.Y ? SelRelease :
- SelBegin.X < SelRelease.X ? SelBegin : SelRelease;
- }
- }
- [XmlIgnore]public Point selectionEnd
- {
- get {
- return SelRelease < 0 || SelBegin.Y > SelRelease.Y ? SelBegin :
- SelBegin.Y < SelRelease.Y ? SelRelease :
- SelBegin.X > SelRelease.X ? SelBegin : SelRelease;
- }
- }
- [XmlIgnore]public string SelectedText
- {
- get {
-
- if (SelRelease < 0 || SelBegin < 0)
- return "";
- if (selectionStart.Y == selectionEnd.Y)
- return lines [selectionStart.Y].Substring (selectionStart.X, selectionEnd.X - selectionStart.X);
- string tmp = "";
- tmp = lines [selectionStart.Y].Substring (selectionStart.X);
- for (int l = selectionStart.Y + 1; l < selectionEnd.Y; l++) {
- tmp += Interface.LineBreak + lines [l];
- }
- tmp += Interface.LineBreak + lines [selectionEnd.Y].Substring (0, selectionEnd.X);
- return tmp;
- }
- }
- [XmlIgnore]public bool selectionIsEmpty
- { get { return SelRelease == SelBegin; } }
-
- List<string> getLines {
- get {
- return Regex.Split (_text, "\r\n|\r|\n|\\\\n").ToList();
- }
- }
- /// <summary>
- /// Moves cursor one char to the left.
- /// </summary>
- /// <returns><c>true</c> if move succeed</returns>
- public bool MoveLeft(){
- int tmp = _currentCol - 1;
- if (tmp < 0) {
- if (_currentLine == 0)
- return false;
- CurrentLine--;
- CurrentColumn = int.MaxValue;
- } else
- CurrentColumn = tmp;
- return true;
- }
- /// <summary>
- /// Moves cursor one char to the right.
- /// </summary>
- /// <returns><c>true</c> if move succeed</returns>
- public bool MoveRight(){
- int tmp = _currentCol + 1;
- if (tmp > lines [_currentLine].Length){
- if (CurrentLine == lines.Count - 1)
- return false;
- CurrentLine++;
- CurrentColumn = 0;
- } else
- CurrentColumn = tmp;
- return true;
- }
- public void GotoWordStart(){
- if (lines[CurrentLine].Length == 0)
- return;
- CurrentColumn--;
- //skip white spaces
- while (!char.IsLetterOrDigit (this.CurrentChar) && CurrentColumn > 0)
- CurrentColumn--;
- while (char.IsLetterOrDigit (lines [CurrentLine] [CurrentColumn]) && CurrentColumn > 0)
- CurrentColumn--;
- if (!char.IsLetterOrDigit (this.CurrentChar))
- CurrentColumn++;
- }
- public void GotoWordEnd(){
- //skip white spaces
- if (CurrentColumn >= lines [CurrentLine].Length - 1)
- return;
- while (!char.IsLetterOrDigit (this.CurrentChar) && CurrentColumn < lines [CurrentLine].Length-1)
- CurrentColumn++;
- while (char.IsLetterOrDigit (this.CurrentChar) && CurrentColumn < lines [CurrentLine].Length-1)
- CurrentColumn++;
- if (char.IsLetterOrDigit (this.CurrentChar))
- CurrentColumn++;
- }
- public void DeleteChar()
- {
- if (selectionIsEmpty) {
- if (CurrentColumn == 0) {
- if (CurrentLine == 0 && lines.Count == 1)
- return;
- CurrentLine--;
- CurrentColumn = lines [CurrentLine].Length;
- lines [CurrentLine] += lines [CurrentLine + 1];
- lines.RemoveAt (CurrentLine + 1);
- OnTextChanged (this, null);
- return;
- }
- CurrentColumn--;
- lines [CurrentLine] = lines [CurrentLine].Remove (CurrentColumn, 1);
- } else {
- int linesToRemove = selectionEnd.Y - selectionStart.Y + 1;
- int l = selectionStart.Y;
-
- if (linesToRemove > 0) {
- lines [l] = lines [l].Remove (selectionStart.X, lines [l].Length - selectionStart.X) +
- lines [selectionEnd.Y].Substring (selectionEnd.X, lines [selectionEnd.Y].Length - selectionEnd.X);
- l++;
- for (int c = 0; c < linesToRemove-1; c++)
- lines.RemoveAt (l);
- CurrentLine = selectionStart.Y;
- CurrentColumn = selectionStart.X;
- } else
- lines [l] = lines [l].Remove (selectionStart.X, selectionEnd.X - selectionStart.X);
- CurrentColumn = selectionStart.X;
- SelBegin = -1;
- SelRelease = -1;
- }
- OnTextChanged (this, null);
- }
-
- #region GraphicObject overrides
- public override Font Font {
- get { return base.Font; }
- set {
- base.Font = value;
-
- using (ImageSurface img = new ImageSurface (Format.Argb32, 1, 1)) {
- using (Context gr = new Context (img)) {
- gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
- gr.SetFontSize (Font.Size);
-
- fe = gr.FontExtents;
- }
- }
- MaxScrollY = 0;
- RegisterForGraphicUpdate ();
- }
- }
- protected override int measureRawSize(LayoutingType lt)
- {
- if (lt == LayoutingType.Height)
- return (int)Math.Ceiling(fe.Height * lines.Count) + Margin * 2;
-
- string txt = _text.Replace("\t", new String (' ', Interface.TabSize));
-
-
- int maxChar = 0;
- foreach (string s in Regex.Split (txt, "\r\n|\r|\n|\\\\n")) {
- if (maxChar < s.Length)
- maxChar = s.Length;
- }
- return (int)(fe.MaxXAdvance * maxChar) + Margin * 2;
- }
- public override void OnLayoutChanges (LayoutingType layoutType)
- {
- base.OnLayoutChanges (layoutType);
-
- if (layoutType == LayoutingType.Height)
- updateVisibleLines ();
- }
- protected override void onDraw (Context gr)
- {
- base.onDraw (gr);
-
- gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
- gr.SetFontSize (Font.Size);
- gr.FontOptions = Interface.FontRenderingOptions;
- gr.Antialias = Interface.Antialias;
-
- Rectangle cb = ClientRectangle;
-
- Foreground.SetAsSource (gr);
-
- bool selectionInProgress = false;
-
- #region draw text cursor
- if (SelBegin != SelRelease)
- selectionInProgress = true;
- else if (HasFocus){
- gr.SetSourceColor(Color.Red);
- gr.LineWidth = 2.0;
- double cursorX = cb.X + (CurrentColumn - ScrollX) * fe.MaxXAdvance;
- gr.MoveTo (0.5 + cursorX, cb.Y + (CurrentLine - ScrollY) * fe.Height);
- gr.LineTo (0.5 + cursorX, cb.Y + (CurrentLine + 1 - ScrollY) * fe.Height);
- gr.Stroke();
- }
- #endregion
-
- Foreground.SetAsSource (gr);
-
- for (int i = 0; i < visibleLines; i++) {
- int curL = i + ScrollY;
- if (curL >= lines.Count)
- break;
- string lstr = lines[curL];
-
- gr.MoveTo (cb.X, cb.Y + fe.Ascent + fe.Height * i);
- gr.ShowText (lstr);
- gr.Fill ();
-
- if (selectionInProgress && curL >= selectionStart.Y && curL <= selectionEnd.Y) {
-
- double rLineX = cb.X,
- rLineY = cb.Y + i * fe.Height,
- rLineW = lstr.Length * fe.MaxXAdvance;
-
- System.Diagnostics.Debug.WriteLine ("sel start: " + selectionStart + " sel end: " + selectionEnd);
- if (curL == selectionStart.Y) {
- rLineX += (selectionStart.X - ScrollX) * fe.MaxXAdvance;
- rLineW -= selectionStart.X * fe.MaxXAdvance;
- }
- if (curL == selectionEnd.Y)
- rLineW -= (lstr.Length - selectionEnd.X) * fe.MaxXAdvance;
-
- gr.Save ();
- gr.Operator = Operator.Source;
- gr.Rectangle (rLineX, rLineY, rLineW, fe.Height);
- gr.SetSourceColor (SelectionBackground);
- gr.FillPreserve ();
- gr.Clip ();
- gr.Operator = Operator.Over;
- gr.SetSourceColor (SelectionForeground);
- gr.MoveTo (cb.X, cb.Y + fe.Ascent + fe.Height * i);
- gr.ShowText (lstr);
- gr.Fill ();
- gr.Restore ();
- }
- }
- }
- #endregion
-
- #region Mouse handling
- void updatemouseLocalPos(Point mpos){
- Point mouseLocalPos = mpos - ScreenCoordinates(Slot).TopLeft - ClientRectangle.TopLeft;
- if (mouseLocalPos.X < 0)
- CurrentColumn--;
- else
- CurrentColumn = ScrollX + (int)Math.Round (mouseLocalPos.X / fe.MaxXAdvance);
-
- if (mouseLocalPos.Y < 0)
- CurrentLine--;
- else
- CurrentLine = ScrollY + (int)Math.Floor (mouseLocalPos.Y / fe.Height);
- }
- public override void onMouseEnter (object sender, MouseMoveEventArgs e)
- {
- base.onMouseEnter (sender, e);
- IFace.MouseCursor = XCursor.Text;
- }
- public override void onMouseLeave (object sender, MouseMoveEventArgs e)
- {
- base.onMouseLeave (sender, e);
- IFace.MouseCursor = XCursor.Default;
- }
- protected override void onFocused (object sender, EventArgs e)
- {
- base.onFocused (sender, e);
-
- // SelBegin = new Point(0,0);
- // SelRelease = new Point (lines.LastOrDefault ().Length, lines.Count-1);
- RegisterForRedraw ();
- }
- protected override void onUnfocused (object sender, EventArgs e)
- {
- base.onUnfocused (sender, e);
-
- // SelBegin = -1;
- // SelRelease = -1;
- RegisterForRedraw ();
- }
- public override void onMouseMove (object sender, MouseMoveEventArgs e)
- {
- base.onMouseMove (sender, e);
-
- if (!e.Mouse.IsButtonDown (MouseButton.Left))
- return;
- if (!HasFocus || SelBegin < 0)
- return;
-
- updatemouseLocalPos (e.Position);
- SelRelease = CurrentPosition;
-
- RegisterForRedraw();
- }
- public override void onMouseDown (object sender, MouseButtonEventArgs e)
- {
- if (this.HasFocus){
- updatemouseLocalPos (e.Position);
- SelBegin = SelRelease = CurrentPosition;
- RegisterForRedraw();//TODO:should put it in properties
- }
-
- //done at the end to set 'hasFocus' value after testing it
- base.onMouseDown (sender, e);
- }
- public override void onMouseUp (object sender, MouseButtonEventArgs e)
- {
- base.onMouseUp (sender, e);
-
- if (SelBegin == SelRelease)
- SelBegin = SelRelease = -1;
-
- updatemouseLocalPos (e.Position);
- RegisterForRedraw ();
- }
- public override void onMouseDoubleClick (object sender, MouseButtonEventArgs e)
- {
- base.onMouseDoubleClick (sender, e);
-
- GotoWordStart ();
- SelBegin = CurrentPosition;
- GotoWordEnd ();
- SelRelease = CurrentPosition;
- RegisterForRedraw ();
- }
- #endregion
-
- #region Keyboard handling
- public override void onKeyDown (object sender, KeyboardKeyEventArgs e)
- {
- base.onKeyDown (sender, e);
-
- Key key = e.Key;
-
- switch (key)
- {
- case Key.Back:
- if (CurrentPosition == 0)
- return;
- this.DeleteChar();
- break;
- case Key.Clear:
- break;
- case Key.Delete:
- if (selectionIsEmpty) {
- if (!MoveRight ())
- return;
- }else if (e.Shift)
- IFace.Clipboard = this.SelectedText;
- this.DeleteChar ();
- break;
- case Key.Enter:
- case Key.KeypadEnter:
- if (!selectionIsEmpty)
- this.DeleteChar ();
- this.InsertLineBreak ();
- break;
- case Key.Escape:
- Text = "";
- CurrentColumn = 0;
- SelRelease = -1;
- break;
- case Key.Home:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = new Point (CurrentColumn, CurrentLine);
- if (e.Control)
- CurrentLine = 0;
- CurrentColumn = 0;
- SelRelease = new Point (CurrentColumn, CurrentLine);
- break;
- }
- SelRelease = -1;
- if (e.Control)
- CurrentLine = 0;
- CurrentColumn = 0;
- break;
- case Key.End:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- if (e.Control)
- CurrentLine = int.MaxValue;
- CurrentColumn = int.MaxValue;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- if (e.Control)
- CurrentLine = int.MaxValue;
- CurrentColumn = int.MaxValue;
- break;
- case Key.Insert:
- if (e.Shift)
- this.Insert (IFace.Clipboard);
- else if (e.Control && !selectionIsEmpty)
- IFace.Clipboard = this.SelectedText;
- break;
- case Key.Left:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = new Point(CurrentColumn, CurrentLine);
- if (e.Control)
- GotoWordStart ();
- else if (!MoveLeft ())
- return;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- if (e.Control)
- GotoWordStart ();
- else
- MoveLeft();
- break;
- case Key.Right:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- if (e.Control)
- GotoWordEnd ();
- else if (!MoveRight ())
- return;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- if (e.Control)
- GotoWordEnd ();
- else
- MoveRight ();
- break;
- case Key.Up:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- CurrentLine--;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- CurrentLine--;
- break;
- case Key.Down:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- CurrentLine++;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- CurrentLine++;
- break;
- case Key.Menu:
- break;
- case Key.NumLock:
- break;
- case Key.PageDown:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- CurrentLine += visibleLines;
- SelRelease = CurrentPosition;
- break;
- }
- SelRelease = -1;
- CurrentLine += visibleLines;
- break;
- case Key.PageUp:
- if (e.Shift) {
- if (selectionIsEmpty)
- SelBegin = CurrentPosition;
- CurrentLine -= visibleLines;
- SelRelease = CurrentPosition;
- break;
- }
- CurrentLine -= visibleLines;
- break;
- case Key.RWin:
- break;
- case Key.Tab:
- this.Insert ("\t");
- break;
- default:
- break;
- }
- RegisterForGraphicUpdate();
- }
- public override void onKeyPress (object sender, KeyPressEventArgs e)
- {
- base.onKeyPress (sender, e);
-
- this.Insert (e.KeyChar.ToString());
-
- SelRelease = -1;
- SelBegin = -1; //new Point(CurrentColumn, SelBegin.Y);
-
- RegisterForGraphicUpdate();
- }
- #endregion
-
-
- /// <summary> Compute x offset in cairo unit from text position </summary>
- double GetXFromTextPointer(Context gr, Point pos)
- {
- try {
- string l = lines [pos.Y].Substring (0, pos.X).
- Replace ("\t", new String (' ', Interface.TabSize));
- return gr.TextExtents (l).XAdvance;
- } catch{
- return -1;
- }
- }
-
- /// <summary> line break could be '\r' or '\n' or '\r\n' </summary>
- string detectLineBreakKind(){
- string strLB = "";
-
- if (string.IsNullOrEmpty(_text))
- return Interface.LineBreak;
- int i = 0;
- while ( i < _text.Length) {
- if (_text [i] == '\r') {
- strLB += '\r';
- i++;
- }
- if (i < _text.Length) {
- if (_text [i] == '\r')
- return "\r";
- if (_text [i] == '\n')
- strLB += '\n';
- }
- if (!string.IsNullOrEmpty (strLB))
- return strLB;
- i++;
- }
- return Interface.LineBreak;
- }
-
- void updateVisibleLines(){
- visibleLines = (int)Math.Floor ((double)ClientRectangle.Height / fe.Height);
- MaxScrollY = Math.Max (0, lines.Count - visibleLines);
-
- System.Diagnostics.Debug.WriteLine ("update visible lines: " + visibleLines);
- System.Diagnostics.Debug.WriteLine ("update MaxScrollY: " + MaxScrollY);
- }
-
-
- /// <summary>
- /// Insert new string at caret position, should be sure no line break is inside.
- /// </summary>
- /// <param name="str">String.</param>
- protected void Insert(string str)
- {
- if (!selectionIsEmpty)
- this.DeleteChar ();
- string[] strLines = Regex.Split (str, "\r\n|\r|\n|" + @"\\n").ToArray();
- lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, strLines[0]);
- CurrentColumn += strLines[0].Length;
- for (int i = 1; i < strLines.Length; i++) {
- InsertLineBreak ();
- lines [CurrentLine] = lines [CurrentLine].Insert (CurrentColumn, strLines[i]);
- CurrentColumn += strLines[i].Length;
- }
- OnTextChanged (this, null);
- RegisterForGraphicUpdate();
- }
-
- /// <summary>
- /// Insert a line break.
- /// </summary>
- protected void InsertLineBreak()
- {
- lines.Insert(CurrentLine + 1, lines[CurrentLine].Substring(CurrentColumn));
- lines [CurrentLine] = lines [CurrentLine].Substring (0, CurrentColumn);
- CurrentLine++;
- CurrentColumn = 0;
- OnTextChanged (this, null);
- }
- }
-}
\ No newline at end of file
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