protected virtual void ReplaceTextBlock(
ITextBlock targetBlock,
int startCharPosition,
int endCharPosition,
string text)
{
if (string.IsNullOrEmpty(text) && startCharPosition == 0 && endCharPosition == targetBlock.Length)
{
this.Children.Remove(targetBlock as RadElement);
}
else
{
string str = targetBlock.Text.Substring(0, startCharPosition);
string text1 = targetBlock.Text.Substring(endCharPosition);
targetBlock.Text = str;
if (TextBoxWrapPanel.IsSpecialText(text))
{
int num = this.InsertTextBlocks(string.IsNullOrEmpty(str) ? targetBlock.Index : targetBlock.Index + 1, text, TextBoxWrapPanel.TextBlockElementType);
if (string.IsNullOrEmpty(str))
{
targetBlock.Index = num + 1;
}
if (!string.IsNullOrEmpty(str) && !string.IsNullOrEmpty(text1))
{
this.InsertTextBlocks(num + 1, text1, TextBoxWrapPanel.TextBlockElementType);
return;
}
}
else
{
targetBlock.Text += text;
}
targetBlock.Text += text1;
}
}
protected virtual void ReplaceTextRange(
ITextBlock targetBlock,
int startCharPosition,
int endCharPosition,
string text)
{
if (startCharPosition == endCharPosition && string.IsNullOrEmpty(text))
{
return;
}
if (targetBlock == null)
{
this.InsertTextBlocks(0, text, TextBoxWrapPanel.TextBlockElementType);
}
else
{
bool flag = string.IsNullOrEmpty(targetBlock.Text) || TextBoxWrapPanel.IsSpecialText(targetBlock.Text);
int index = targetBlock.Index;
if (flag)
{
this.ReplaceSpecialTextBlock(targetBlock, startCharPosition, endCharPosition, text);
}
else
{
this.ReplaceTextBlock(targetBlock, startCharPosition, endCharPosition, text);
}
if (!string.IsNullOrEmpty(targetBlock.Text) || !this.Children.Contains(targetBlock as RadElement))
{
return;
}
this.Children.Remove(targetBlock as RadElement);
}
}