// Remove InlineObjectRun.Element from TextLayer.
// Caller of RemoveInlineObjectRun will remove it from inlineObjects collection.
void RemoveInlineObjectRun(InlineObjectRun ior)
{
if (ior.Element.IsKeyboardFocusWithin) {
// When the inline element that has the focus is removed, WPF will reset the
// focus to the main window without raising appropriate LostKeyboardFocus events.
// To work around this, we manually set focus to the next focusable parent.
UIElement element = textView;
while (element != null && !element.Focusable) {
element = VisualTreeHelper.GetParent(element) as UIElement;
}
if (element != null)
Keyboard.Focus(element);
}
ior.VisualLine = null;
RemoveVisualChild(ior.Element);
}
public override TextRun GetTextRun(int textSourceCharacterIndex)
{
try
{
foreach (VisualLineElement element in VisualLine.Elements)
{
if (textSourceCharacterIndex >= element.VisualColumn &&
textSourceCharacterIndex < element.VisualColumn + element.VisualLength)
{
int relativeOffset = textSourceCharacterIndex - element.VisualColumn;
TextRun run = element.CreateTextRun(textSourceCharacterIndex, this);
if (run == null)
{
throw new ArgumentNullException(element.GetType().Name + ".CreateTextRun");
}
if (run.Length == 0)
{
throw new ArgumentException("The returned TextRun must not have length 0.", element.GetType().Name + ".Length");
}
if (relativeOffset + run.Length > element.VisualLength)
{
throw new ArgumentException("The returned TextRun is too long.", element.GetType().Name + ".CreateTextRun");
}
InlineObjectRun inlineRun = run as InlineObjectRun;
if (inlineRun != null)
{
inlineRun.VisualLine = VisualLine;
VisualLine.hasInlineObjects = true;
TextView.AddInlineObject(inlineRun);
}
return(run);
}
}
if (TextView.Options.ShowEndOfLine && textSourceCharacterIndex == VisualLine.VisualLength)
{
return(CreateTextRunForNewLine());
}
return(new TextEndOfParagraph(1));
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
throw;
}
}
// Remove InlineObjectRun.Element from TextLayer.
// Caller of RemoveInlineObjectRun will remove it from inlineObjects collection.
void RemoveInlineObjectRun(InlineObjectRun ior)
{
if (ior.Element.IsKeyboardFocusWithin)
{
// When the inline element that has the focus is removed, WPF will reset the
// focus to the main window without raising appropriate LostKeyboardFocus events.
// To work around this, we manually set focus to the next focusable parent.
UIElement element = textView;
while (element != null && !element.Focusable)
{
element = VisualTreeHelper.GetParent(element) as UIElement;
}
if (element != null)
{
Keyboard.Focus(element);
}
}
ior.VisualLine = null;
RemoveVisualChild(ior.Element);
}
/// <summary>
/// Adds a new inline object.
/// </summary>
internal void AddInlineObject(InlineObjectRun inlineObject)
{
inlineObjects.Add(inlineObject);
AddVisualChild(inlineObject.Element);
inlineObject.Element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
}
/// <summary>
/// Adds a new inline object.
/// </summary>
internal void AddInlineObject(InlineObjectRun inlineObject)
{
inlineObjects.Add(inlineObject);
AddVisualChild(inlineObject.Element);
inlineObject.Element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
}
