public bool OnActionItemClicked(ActionMode mode, IMenuItem item)
{
CharacterStyle cs;
int start = edt.SelectionStart;
int end = edt.SelectionEnd;
SpannableStringBuilder ssb = new SpannableStringBuilder(edt.Text);
switch (item.ItemId)
{
case Resource.Id.bold:
cs = new StyleSpan(TypefaceStyle.Bold);
ssb.SetSpan(cs, start, end, SpanTypes.ExclusiveExclusive);
edt.Text = ssb.ToString();
return(true);
case Resource.Id.italic:
cs = new StyleSpan(TypefaceStyle.Italic);
ssb.SetSpan(cs, start, end, SpanTypes.ExclusiveExclusive);
edt.Text = ssb.ToString();
return(true);
case Resource.Id.underline:
cs = new UnderlineSpan();
ssb.SetSpan(cs, start, end, SpanTypes.ExclusiveExclusive);
edt.Text = ssb.ToString();
return(true);
case Resource.Id.strikethrough:
cs = new StrikethroughSpan();
ssb.SetSpan(cs, start, end, SpanTypes.ExclusiveExclusive);
edt.Text = ssb.ToString();
return(true);
}
return(false);
}
void SetSpan(int start, int end, StrikethroughSpan span)
{
if (start == end)
{
EditText.EditableText.SetSpan(span, start, end, SpanTypes.InclusiveInclusive);
}
else
{
EditText.EditableText.SetSpan(span, start, end, SpanTypes.ExclusiveInclusive);
}
}
void DisableSpan(int start, int end, StrikethroughSpan span)
{
var spans = EditText.EditableText.GetSpans(start, end, Java.Lang.Class.FromType(typeof(StrikethroughSpan)));
for (int i = spans.Length - 1; i >= 0; i--)
{
int spanEnd = EditText.EditableText.GetSpanEnd(spans[i]);
int spanStart = EditText.EditableText.GetSpanStart(spans[i]);
EditText.EditableText.RemoveSpan(spans[i]);
if (spanStart < start)
{
EditText.EditableText.SetSpan(span, spanStart, start, SpanTypes.ExclusiveExclusive);
}
if (spanEnd > end)
{
EditText.EditableText.SetSpan(span, end, spanEnd, SpanTypes.ExclusiveExclusive);
}
}
}
private static void HandleFormatRun(ISpannable spannableString, IAttributedTextRun run)
{
var attributes = run.Attributes;
var start = run.Start;
var end = start + run.Length;
var fontName = attributes.GetFontName();
if (fontName != null)
{
var typefaceSpan = new TypefaceSpan(fontName);
spannableString.SetSpan(typefaceSpan, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetBold() && attributes.GetItalic())
{
var span = new StyleSpan(TypefaceStyle.BoldItalic);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
else if (attributes.GetBold())
{
var span = new StyleSpan(TypefaceStyle.Bold);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
else if (attributes.GetItalic())
{
var span = new StyleSpan(TypefaceStyle.Italic);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetUnderline())
{
var span = new UnderlineSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
var foregroundColor = attributes.GetForegroundColor()?.ParseAsInts()?.ToColor();
if (foregroundColor != null)
{
var span = new ForegroundColorSpan((global::Android.Graphics.Color)foregroundColor);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
var backgroundColor = attributes.GetBackgroundColor()?.ParseAsInts()?.ToColor();
if (backgroundColor != null)
{
var span = new BackgroundColorSpan((global::Android.Graphics.Color)backgroundColor);
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetSubscript())
{
var span = new SubscriptSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetSuperscript())
{
var span = new SuperscriptSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetStrikethrough())
{
var span = new StrikethroughSpan();
spannableString.SetSpan(span, start, end, SpanTypes.ExclusiveExclusive);
}
if (attributes.GetUnorderedList())
{
var bulletSpan = new BulletSpan();
spannableString.SetSpan(bulletSpan, start, end, SpanTypes.ExclusiveExclusive);
}
}
