private void ResolveBackspaceKey(RichFactTextBox rtb, KeyEventArgs e)
{
var caretPos = rtb.CaretPosition;
var textBeforeCaret = caretPos.GetTextInRun(LogicalDirection.Backward);
if (caretPos.Parent is Run run)
{
if (textBeforeCaret == "")
{
var previousRun = run.PreviousInline ?? new Run();
if (previousRun.GetType() == typeof(Hyperlink))
{
var hLink = previousRun as Hyperlink;
var hLinkRun = hLink.Inlines.FirstInline as Run;
if (hLinkRun.Text.Length == 1)
{
var lastHyperlinkCharacterData = new LastHyperlinkCharacterData
{
rtb = rtb,
hyperlink = hLink,
};
Ea.Publish(new WarningLastHyperlinkCharacterEventModel()
{
Data = lastHyperlinkCharacterData
});
//TODO make someone listen to this
e.Handled = true;
}
}
}
else //if the caret is not at the start of the Run
{
var list = caretPos.Paragraph.Inlines.ToList();
var indexOfRun = list.IndexOf(run);
if (indexOfRun != -1)
{
var indexOfPrevRun = 0;
if (indexOfRun != 0 || indexOfRun > 0)
{
indexOfPrevRun = indexOfRun - 1;
}
var prevRun = list[indexOfPrevRun];
if (textBeforeCaret == "")
{
if (prevRun.GetType() == typeof(Hyperlink))
{
if (run.Text.Length == 1)
{
//MessageBox.Show("last character!");
//event
e.Handled = true;
}
}
}
}
}
}
}
/// <summary>
/// Checks which key was pressed and handles
/// accordingly.
/// </summary>
/// <param name="rtb"></param>
/// <param name="e"></param>
public void PrevKeyDown(RichFactTextBox rtb, KeyEventArgs e)
{
var caretPos = rtb.CaretPosition;
if (e.Key == Key.Enter)
{
e.Handled = true;
caretPos.InsertLineBreak();
}
if (e.Key == Key.Back)
{
ResolveBackspaceKey(rtb, e);
}
}