protected void DispatchUrlClick(TextView textView, ClickableSpanWithText spanWithText)
{
var spanUrl = spanWithText.Text;
var handled = _onLinkClickListener != null && _onLinkClickListener.OnClick(textView, spanUrl);
if (!handled)
{
// Let Android handle this click.
spanWithText.Span.OnClick(textView);
}
}
/**
* Adds a highlight background color span to the TextView.
*/
protected void HighlightUrl(TextView textView, ClickableSpanWithText spanWithText, ISpannable text)
{
if (_isUrlHighlighted)
{
return;
}
_isUrlHighlighted = true;
var spanStart = text.GetSpanStart(spanWithText.Span);
var spanEnd = text.GetSpanEnd(spanWithText.Span);
text.SetSpan(new BackgroundColorSpan(textView.HighlightColor), spanStart, spanEnd, SpanTypes.InclusiveInclusive);
textView.SetText(text, TextView.BufferType.Spannable);
Selection.SetSelection(text, spanStart, spanEnd);
}
/**
* Determines the touched location inside the TextView's text and returns the ClickableSpan found under it (if any).
*
* @return The touched ClickableSpan or null.
*/
protected ClickableSpanWithText FindClickableSpanUnderTouch(TextView textView, ISpannable text, MotionEvent e)
{
// So we need to find the location in text where touch was made, regardless of whether the TextView
// has scrollable text. That is, not the entire text is currently visible.
var touchX = (int)e.GetX();
var touchY = (int)e.GetY();
// Ignore padding.
touchX -= textView.TotalPaddingLeft;
touchY -= textView.TotalPaddingTop;
// Account for scrollable text.
touchX += textView.ScrollX;
touchY += textView.ScrollY;
var layout = textView.Layout;
var touchedLine = layout.GetLineForVertical(touchY);
var touchOffset = layout.GetOffsetForHorizontal(touchedLine, touchX);
_touchedLineBounds.Left = layout.GetLineLeft(touchedLine);
_touchedLineBounds.Top = layout.GetLineTop(touchedLine);
_touchedLineBounds.Right = layout.GetLineWidth(touchedLine) + _touchedLineBounds.Left;
_touchedLineBounds.Bottom = layout.GetLineBottom(touchedLine);
if (_touchedLineBounds.Contains(touchX, touchY))
{
// Find any ClickableSpan that lies under the touched area
var spans = text.GetSpans(touchOffset, touchOffset, SpanClass);
foreach (var span in spans)
{
if (span is ClickableSpan)
{
return(ClickableSpanWithText.OfSpan(textView, span as ClickableSpan));
}
}
// No ClickableSpan found under the touched location.
return(null);
}
// Touch lies outside the line's horizontal bounds where no spans should exist.
return(null);
}