public static bool ExceedMaxLines(TextView tv)
{
ExpandableTextViewTag tag = tv.Tag as ExpandableTextViewTag;
if (tag == null)
{
throw new InvalidOperationException("Unable to handle a TextView without Tag.");
}
return(tag.LineCount > tag.MaxLines);
}
public static void Switch(TextView tv)
{
ExpandableTextViewTag tag = tv.Tag as ExpandableTextViewTag;
if (tag == null)
{
throw new InvalidOperationException("Unable to handle a TextView without Tag.");
}
tag.IsPartial = !tag.IsPartial;
tv.RequestLayout();
tv.ViewTreeObserver.AddOnGlobalLayoutListener(new ExpandableTextViewUtilty(tv));
}
private static ISpannable StyleViewMoreLess(ExpandableTextViewTag tag)
{
string expandText = tag.IsPartial ? tag.ViewMoreLessOptions.ViewMore : tag.ViewMoreLessOptions.ViewLess;
SpannableStringBuilder ssb = new SpannableStringBuilder(expandText);
/*
* ssb.SetSpan(new ViewMoreLessSpan(delegate
* {
* tag.IsPartial = ! tag.IsPartial;
* tv.RequestLayout();
* tv.ViewTreeObserver.AddOnGlobalLayoutListener(new ExpandableTextViewUtilty(tv));
* }), text.Length - expandText.Length, text.Length, 0);
*/
ssb.SetSpan(new ForegroundColorSpan(Color.Red), 0, expandText.Length, 0);
ssb.SetSpan(new RelativeSizeSpan(ViewMoreLessProportion), 0, expandText.Length, 0);
return(ssb);
}
private void ProcessAutoLink(ExpandableTextViewTag tag, SpannableStringBuilder ssbPartial)
{
if (tag.AutoLinkOptions != null && (!tag.AutoLinkOptions.IsLinkUnderline))
{
var allURLSpans = tag.FormattedText.GetSpans(
0, tag.FormattedText.Length(), Java.Lang.Class.FromType(typeof(URLSpan)));
var partialURLSpans = ssbPartial.GetSpans(0, ssbPartial.Length(), Java.Lang.Class.FromType(typeof(URLSpan)));
foreach (var span in partialURLSpans)
{
int startIndex = ssbPartial.GetSpanStart(span);
int endIndex = ssbPartial.GetSpanEnd(span);
var foundSpan = FixedTextUtils.FindSpan(tag.FormattedText, allURLSpans, startIndex).JavaCast <URLSpan>();
ssbPartial.RemoveSpan(span);
if (foundSpan != null)
{
ssbPartial.SetSpan(new NoUnderlineURLSpan(foundSpan.URL), startIndex, endIndex, 0);
}
}
}
}
public static bool IsExpandable(TextView tv)
{
ExpandableTextViewTag tag = tv.Tag as ExpandableTextViewTag;
return(tag != null);
}
