protected virtual TextPosition NavigateToLine(
KeyEventArgs keys,
TextPosition position)
{
Keys keyCode = keys.KeyCode;
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
ReadOnlyCollection <LineInfo> lines = (ReadOnlyCollection <LineInfo>)viewElement.Lines;
LineInfo line = position.Line;
int num = lines.IndexOf(line);
if (keyCode == Keys.Up && num > 0)
{
line = lines[num - 1];
}
else if (keyCode == Keys.Down && num < lines.Count - 1)
{
line = lines[num + 1];
}
if (position.Line == line)
{
return(position);
}
float x = viewElement.GetLocation(position).X + viewElement.ScrollOffset.Width;
return(this.GetTextPositionFromLine(line, x));
}
protected virtual RectangleF GetRectangle(LineInfo currentLine)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
RectangleF boundingRectangle = currentLine.ControlBoundingRectangle;
PointF absolute1 = viewElement.PointToAbsolute(boundingRectangle.Location);
ITextBlock textBlock = currentLine.StartBlock;
ITextBlock endBlock = currentLine.EndBlock;
while (TextBoxWrapPanel.IsWhitespace(textBlock.Text))
{
ITextBlock nextBlock = this.TextBoxElement.ViewElement.GetNextBlock(textBlock.Index);
if (nextBlock != null)
{
textBlock = nextBlock;
absolute1.Y = viewElement.PointToAbsolute((PointF)textBlock.ControlBoundingRectangle.Location).Y;
}
else
{
break;
}
}
PointF location = (PointF)textBlock.ControlBoundingRectangle.Location;
PointF absolute2 = viewElement.PointToAbsolute(location);
PointF pointF = new PointF((float)endBlock.ControlBoundingRectangle.Right, (float)endBlock.ControlBoundingRectangle.Y);
pointF = viewElement.PointToAbsolute(pointF);
absolute1.X = absolute2.X;
boundingRectangle.Width = pointF.X - boundingRectangle.X;
boundingRectangle.Location = absolute1;
return(boundingRectangle);
}
public virtual void Invalidate(
TextPosition selectionStart,
TextPosition selectionEnd,
bool repaint)
{
this.selectionPolygons = (RectangleF[])null;
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
if (object.Equals((object)selectionStart, (object)selectionEnd) || selectionEnd == (TextPosition)null)
{
viewElement.Invalidate();
}
else
{
TextPosition.Swap(ref selectionStart, ref selectionEnd);
LineInfo line1 = selectionStart.Line;
LineInfo line2 = selectionEnd.Line;
ReadOnlyCollection <LineInfo> lines = (ReadOnlyCollection <LineInfo>)viewElement.Lines;
int index = lines.IndexOf(line1);
int lineSpacing = viewElement.LineSpacing;
List <RectangleF> rectangleFList = new List <RectangleF>();
for (; index < lines.Count; ++index)
{
LineInfo currentLine = lines[index];
RectangleF rectangle = this.GetRectangle(currentLine);
if (currentLine == line1)
{
PointF location = viewElement.GetLocation(selectionStart);
rectangle.Width += rectangle.X - location.X;
rectangle.X = location.X;
}
if (currentLine == line2)
{
PointF location = viewElement.GetLocation(selectionEnd);
rectangle.Width = location.X - rectangle.X;
}
if (currentLine != line1)
{
rectangle.Y -= (float)lineSpacing;
rectangle.Height += (float)lineSpacing;
}
rectangleFList.Add(rectangle);
if (currentLine == line2)
{
break;
}
}
this.selectionPolygons = rectangleFList.ToArray();
if (!repaint)
{
return;
}
viewElement.Invalidate();
}
}
public TextBoxNavigator(RadTextBoxControlElement textBoxElement)
{
this.textBoxElement = textBoxElement;
this.selectionStart = (TextPosition)null;
this.selectionEnd = (TextPosition)null;
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
viewElement.VScroller.ScrollerUpdated += new EventHandler(this.OnScrollerUpdated);
viewElement.HScroller.ScrollerUpdated += new EventHandler(this.OnScrollerUpdated);
viewElement.TextChanged += new EventHandler(this.OnViewElementTextChanged);
this.textBoxElement.RadPropertyChanged += new RadPropertyChangedEventHandler(this.OnTextBoxElementRadPropertyChanged);
}
protected virtual void OnRemoveButtonClick()
{
TextBoxViewElement parent = this.Parent as TextBoxViewElement;
if (parent == null)
{
return;
}
parent.BeginEditUpdate();
parent.Children.Remove((RadElement)this);
parent.UpdateLayout();
parent.EndEditUpdate(true, string.Empty, this.offset, TextBoxChangeAction.TextEdit);
}
protected virtual void Dispose(bool disposing)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
if (viewElement.VScroller != null)
{
viewElement.VScroller.ScrollerUpdated -= new EventHandler(this.OnScrollerUpdated);
}
if (viewElement.HScroller != null)
{
viewElement.HScroller.ScrollerUpdated -= new EventHandler(this.OnScrollerUpdated);
}
viewElement.TextChanged -= new EventHandler(this.OnViewElementTextChanged);
this.textBoxElement.RadPropertyChanged -= new RadPropertyChangedEventHandler(this.OnTextBoxElementRadPropertyChanged);
}
protected virtual TextPosition GetEditablePosition(TextPosition position, bool next)
{
if (position == (TextPosition)null)
{
return((TextPosition)null);
}
TextBoxViewElement viewElement = this.TextBoxElement.ViewElement;
ITextBlock textBlock1 = position.TextBlock;
if (textBlock1 is TokenizedTextBlockElement)
{
if (position.CharPosition == 0 && textBlock1.Index > 0)
{
textBlock1 = viewElement.Children[textBlock1.Index - 1] as ITextBlock;
}
else if (position.CharPosition == textBlock1.Length && textBlock1.Index < viewElement.Children.Count - 1)
{
textBlock1 = viewElement.Children[textBlock1.Index + 1] as ITextBlock;
}
}
ITextBlock textBlock2 = textBlock1;
ITextBlock child;
for (; textBlock1 is TextBlockElement; textBlock1 = child)
{
textBlock2 = textBlock1;
int index = next ? textBlock1.Index + 1 : textBlock1.Index - 1;
if (index >= 0 && index < viewElement.Children.Count)
{
child = viewElement.Children[index] as ITextBlock;
if (TextBoxWrapPanel.IsLineFeed(child.Text) || TextBoxWrapPanel.IsCarriageReturn(child.Text))
{
break;
}
}
else
{
break;
}
}
if (textBlock2 is TextBlockElement)
{
return(new TextPosition(viewElement.Lines.BinarySearchByBlockIndex(textBlock2.Index), textBlock2, next ? textBlock2.Length : 0));
}
return(position);
}
private void OnScrollTimerTick(object sender, EventArgs e)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
Rectangle boundingRectangle = viewElement.ControlBoundingRectangle;
Point point = viewElement.ElementTree == null ? Point.Empty : viewElement.ElementTree.Control.PointToClient(Control.MousePosition);
if (viewElement.ElementTree == null || boundingRectangle.Contains(point))
{
this.scrollTimer.Stop();
}
else
{
if (this.textBoxElement.Multiline)
{
int num = 0;
if (point.Y > boundingRectangle.Bottom)
{
num = point.Y - boundingRectangle.Bottom;
}
else if (point.Y < boundingRectangle.Y)
{
num = point.Y - boundingRectangle.Y;
}
if (num != 0)
{
viewElement.VScroller.Value += num;
point.Y -= num;
}
}
int num1 = 0;
if (point.X < boundingRectangle.X)
{
num1 = point.X - boundingRectangle.X;
}
else if (point.X > boundingRectangle.Right)
{
num1 = point.X - boundingRectangle.Right;
}
if (num1 != 0)
{
viewElement.HScroller.Value += num1;
point.X -= num1;
}
this.ProcessMouseSelection(point);
}
}
private TextPosition GetWordEndPosition(
LineInfo currentLine,
ITextBlock currentBlock)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
bool flag1 = TextBoxWrapPanel.IsTabOrWhitespace(currentBlock.Text);
bool flag2 = false;
ITextBlock child;
for (; currentBlock.Index < viewElement.Children.Count - 1; currentBlock = child)
{
child = viewElement.Children[currentBlock.Index + 1] as ITextBlock;
bool flag3 = TextBoxWrapPanel.IsTabOrWhitespace(child.Text);
bool flag4 = TextBoxWrapPanel.IsCarriageReturn(child.Text);
bool flag5 = TextBoxWrapPanel.IsLineFeed(child.Text);
if (!flag4 && !flag5)
{
if (flag1)
{
if (!flag3)
{
break;
}
}
else if (!flag2 || flag3)
{
if (!flag2)
{
flag2 = flag3;
}
}
else
{
break;
}
}
else
{
break;
}
}
currentLine = viewElement.Lines.BinarySearchByBlockIndex(currentBlock.Index);
return(new TextPosition(currentLine, currentBlock, currentBlock.Length));
}
public virtual void SetCaretPosition()
{
if (this.selectionStart == (TextPosition)null)
{
return;
}
TextBoxControlCaret caret = this.textBoxElement.Caret;
TextPosition caretPosition = this.CaretPosition;
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
PointF location = viewElement.GetLocation(caretPosition);
SizeF scrollOffset = viewElement.ScrollOffset;
location.X += scrollOffset.Width;
location.Y += scrollOffset.Height;
caret.Height = (int)caretPosition.Line.Size.Height;
Point point = this.textBoxElement.PointFromControl(Point.Truncate(location));
caret.Position = point;
}
public virtual TextPosition GetPositionFromOffset(int offset)
{
if (offset < 0)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
if (offset > this.textBoxElement.TextLength)
{
offset = this.textBoxElement.TextLength;
}
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
LineInfo line = viewElement.Lines.BinarySearchByOffset(offset);
if (line == null)
{
return((TextPosition)null);
}
ITextBlock textBlock = viewElement.BinarySearchTextBlockByOffset(line, offset);
int charPosition = offset - textBlock.Offset;
return(new TextPosition(line, textBlock, charPosition));
}
protected virtual TextPosition GetNextPositionCore(TextPosition position)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
TextPosition position1 = position;
LineInfo line = position.Line;
ITextBlock textBlock = position.TextBlock;
int charPosition1 = position.CharPosition + 1;
int index = textBlock.Index + 1;
int num = textBlock.Offset + textBlock.Length + 1;
bool flag = false;
if (charPosition1 <= textBlock.Length)
{
position1 = new TextPosition(line, textBlock, charPosition1);
flag = TextBoxWrapPanel.IsCarriageReturn(textBlock.Text);
}
else if (num <= viewElement.TextLength)
{
ITextBlock child = viewElement.Children[index] as ITextBlock;
int charPosition2;
if (index > line.EndBlock.Index)
{
line = viewElement.Lines.BinarySearchByBlockIndex(index);
charPosition2 = 0;
}
else
{
charPosition2 = child.Length > 0 ? 1 : 0;
flag = TextBoxWrapPanel.IsCarriageReturn(child.Text) || TextBoxWrapPanel.IsLineFeed(child.Text);
}
position1 = new TextPosition(line, child, charPosition2);
}
if (!object.Equals((object)position1, (object)position) && flag)
{
position1 = this.GetNextPositionCore(position1);
}
return(position1);
}
private string GetText()
{
int num = this.text != null ? this.text.Length : 0;
if (num > 0)
{
TextBoxViewElement parent = this.Parent as TextBoxViewElement;
if (parent != null && !parent.Multiline)
{
char ch1 = Application.RenderWithVisualStyles ? '●' : '*';
char ch2 = parent.UseSystemPasswordChar ? ch1 : parent.PasswordChar;
if (ch2 != char.MinValue)
{
StringBuilder stringBuilder = new StringBuilder();
for (; num > 0; --num)
{
stringBuilder.Append(ch2);
}
return(stringBuilder.ToString());
}
}
}
return(this.text);
}
protected virtual TextPosition GetPreviousPositionCore(TextPosition position)
{
TextPosition position1 = position;
LineInfo line = position.Line;
int charPosition1 = position.CharPosition - 1;
ITextBlock textBlock = position.TextBlock;
int num = textBlock.Offset - 1;
bool flag = false;
if (charPosition1 >= 0)
{
position1 = new TextPosition(line, textBlock, charPosition1);
flag = TextBoxWrapPanel.IsCarriageReturn(textBlock.Text);
}
else if (num >= 0)
{
TextBoxViewElement viewElement = this.textBoxElement.ViewElement;
int index = textBlock.Index - 1;
ITextBlock child = viewElement.Children[index] as ITextBlock;
int charPosition2 = child.Length > 0 ? child.Length - 1 : 0;
if (index < line.StartBlock.Index)
{
line = viewElement.Lines.BinarySearchByBlockIndex(index);
}
else
{
flag = TextBoxWrapPanel.IsLineFeed(child.Text) || TextBoxWrapPanel.IsCarriageReturn(child.Text);
}
position1 = new TextPosition(line, child, charPosition2);
}
if (!object.Equals((object)position1, (object)position) && flag)
{
position1 = this.GetPreviousPositionCore(position1);
}
return(position1);
}