public ISpanned CreateStyledString(TextStyleParameters style, string text, int startIndex = 0, int endIndex = -1)
{
if (text.Length == 0)
{
return(null);
}
if (endIndex == -1)
{
endIndex = text.Length;
}
if (startIndex >= endIndex)
{
throw new Exception("Unable to create styled string, StartIndex is too high: " + startIndex);
}
// Parse the text
text = ParseString(style, text);
// If we have HMTL
if (!string.IsNullOrEmpty(text) && Common.MatchHtmlTags.IsMatch(text))
{
return(CreateHtmlString(text, style.Name));
}
else
{
var builder = new SpannableStringBuilder(text);
var font = GetFont(style.Font);
var span = new CustomTypefaceSpan("", font, style);
builder.SetSpan(span, startIndex, endIndex, SpanTypes.ExclusiveExclusive);
return(builder);
}
}
/// <summary>
/// Handles a custom tag
/// </summary>
/// <returns>void</returns>
/// <param name="opening">bool</param>
/// <param name="tag">string</param>
/// <param name="output">IEditable</param>
/// <param name="xmlReader">IXMLReader</param>
public void HandleTag(bool opening, string tag, IEditable output, Org.Xml.Sax.IXMLReader xmlReader)
{
TextStyleParameters style = _styles.ContainsKey(tag) ? _styles [tag] : null;
// Body overwrites the inline styles so we set that at the textview level
if (style != null)
{
var text = output as SpannableStringBuilder;
if (opening)
{
Start(text, new TextStylesObject());
}
else
{
// Retrieve font
Typeface font = null;
if (!string.IsNullOrEmpty(style.Font))
{
_instance._typeFaces.TryGetValue(style.Font, out font);
}
var customSpan = new CustomTypefaceSpan("", font, style);
End(style, text, Class.FromType(typeof(TextStylesObject)), customSpan);
}
}
}
public void Style <T>(T target, string styleID, string text = null, List <CssTag> customTags = null, bool useExistingStyles = true)
{
var style = GetStyle(styleID);
var type = typeof(T);
var textView = (type == typeTextView) ? target as TextView : target as EditText;
if (textView == null)
{
throw new NotSupportedException("The specified type is not supported, please use a TextView or EditText: " + type.ToString());
}
text = text ?? textView.Text;
var isHTML = (!string.IsNullOrEmpty(text) && Common.MatchHtmlTags.IsMatch(text));
// Style the TextView
if (isHTML)
{
StyleTextView(textView, style, true);
var html = CreateHtmlString(text, styleID, customTags, useExistingStyles);
textView.SetText(html, TextView.BufferType.Spannable);
}
else if (style.RequiresHtmlTags())
{
StyleTextView(textView, style, false);
var builder = new SpannableStringBuilder(ParseString(style, text));
var font = GetFont(style.Font);
var span = new CustomTypefaceSpan("", font, style);
builder.SetSpan(span, 0, builder.Length(), SpanTypes.ExclusiveExclusive);
textView.SetText(builder, TextView.BufferType.Spannable);
}
else
{
StyleTextView(textView, style, true);
textView.SetText(ParseString(style, text), TextView.BufferType.Normal);
}
}
