private static void CommandOnKeyPressPropertyChanged(BindableObject bindable, object oldValue, object newValue)
{
if (bindable is Button || bindable is ExtendedLabel)
{
if (!string.IsNullOrEmpty(KeyPress.GetCommandText(bindable)))
{
throw new InvalidOperationException("Can't simultaneously set KeyPress.CommandOnKeyPress and KeyPress.CommandText attached properties");
}
if (((bool)oldValue == true) && ((bool)newValue == false))
{
DeleteControl(bindable);
}
else if ((bool)newValue)
{
ReRegisterControl(bindable);
bindable.PropertyChanged += (s, e) =>
{
if (e.PropertyName == "Text")
{
ReRegisterControl(bindable);
}
};
}
}
}
private static void ReRegisterControl(BindableObject bindable)
{
CleanupControls();
var texts = GetCommandKeysFromText(bindable);
if (texts != null)
{
ReAddControl(bindable, texts);
var label = bindable as ExtendedLabel;
if (label != null && KeyPress.GetHighlightKeys(label) && KeyPress.HighlightStyle != null && !string.IsNullOrEmpty(KeyPress.GetCommandText(label)))
{
var text = KeyPress.GetCommandText(label);
var t0 = text.IndexOf('[') != 0 ?
text.Substring(0, text.IndexOf('[')) :
string.Empty;
var t1 = text.Substring(text.IndexOf('['), text.IndexOf(']') - t0.Length + 1);
var t2 = text.IndexOf(']') < text.Length ?
text.Substring(text.IndexOf(']') + 1, text.Length - t1.Length - t0.Length) :
string.Empty;
var ft = new FormattedString();
if (!string.IsNullOrEmpty(t0))
{
ft.Spans.Add(new Span()
{
Text = t0
});
}
ft.Spans.Add(new Span()
{
Text = t1, Style = HighlightStyle
});
if (!string.IsNullOrEmpty(t2))
{
ft.Spans.Add(new Span()
{
Text = t2
});
}
label.FormattedText = ft;
}
}
else
{
DeleteControl(bindable);
}
}
private static string[] GetCommandKeysFromText(BindableObject view)
{
if (!(view is Button || view is ExtendedLabel))
{
return(null);
}
var text = KeyPress.GetCommandText(view);
if (string.IsNullOrEmpty(text))
{
text = view is Button ? (view as Button).Text : (view as ExtendedLabel).Text;
}
if (!string.IsNullOrEmpty(text))
{
var firstPos = text.IndexOf('[');
var secondPos = text.IndexOf(']');
if (secondPos - firstPos - 1 <= 0)
{
return(null);
}
text = text.Trim().ToLower().Substring(firstPos + 1, secondPos - firstPos - 1);
if (text.Contains(","))
{
var texts = text.Split(',');
for (int i = 0; i < texts.Length; i++)
{
texts[i] = texts[i].Trim();
}
return(texts);
}
return(new string[] { text });
}
return(null);
}