void UpdateMaxLength()
{
_editText = _editText ?? Control.GetChildrenOfType <EditText>().FirstOrDefault();
var currentFilters = new List <IInputFilter>(_editText?.GetFilters() ?? new IInputFilter[0]);
for (var i = 0; i < currentFilters.Count; i++)
{
if (currentFilters[i] is InputFilterLengthFilter)
{
currentFilters.RemoveAt(i);
break;
}
}
currentFilters.Add(new InputFilterLengthFilter(Element.MaxLength));
_editText?.SetFilters(currentFilters.ToArray());
var currentControlText = Control.Query;
if (currentControlText.Length > Element.MaxLength)
{
Control.SetQuery(currentControlText.Substring(0, Element.MaxLength), false);
}
}
public static void SetLengthFilter(this EditText editText, int maxLength)
{
var currentFilters = new List <IInputFilter>(editText.GetFilters() ?? new IInputFilter[0]);
var changed = false;
for (var i = 0; i < currentFilters.Count; i++)
{
if (currentFilters[i] is InputFilterLengthFilter)
{
currentFilters.RemoveAt(i);
changed = true;
break;
}
}
if (maxLength > 0)
{
currentFilters.Add(new InputFilterLengthFilter(maxLength));
changed = true;
}
if (changed)
{
editText.SetFilters(currentFilters.ToArray());
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////
// Helper methods
//////////////////////////////////////////////////////////////////////////////////////////////////
protected void AddWillChangeDelegate(EditText editText, Func <string, bool> willChangeDelegate)
{
var oldFilters = editText.GetFilters();
var newFilters = new IInputFilter[oldFilters.Length + 1];
newFilters[newFilters.Length - 1] = new DelegatedInputFilter(willChangeDelegate);
editText.SetFilters(newFilters);
}
public void SetFilters_WhenCalledWithoutFilters_DoNothing()
{
EditText editText = new EditText(MainActivity.Current);
editText.SetFilters();
var appliedFilters = editText.GetFilters();
if (appliedFilters != null)
{
Assert.Empty(appliedFilters);
}
}
public void SetFilters_WhenCalledWithMultipleFilters_AppliesAllFilters()
{
EditText editText = new EditText(MainActivity.Current);
var filter1 = new MockInputFilter();
var filter2 = new MockInputFilter();
var filter3 = new MockInputFilter();
var filters = new IInputFilter[] { filter1, filter2, filter3 };
editText.SetFilters(filter1, filter2, filter3);
var appliedFilters = editText.GetFilters();
Assert.Equal(filters, appliedFilters);
}
public void SetFilters_WhenCalledWithMultipleFiltersWithNullAndDuplicates_AppliesAllFilters()
{
EditText editText = new EditText(MainActivity.Current);
var filter1 = new MockInputFilter();
var filter2 = new MockInputFilter();
var filter3 = new MockInputFilter();
var nullFilter = null as IInputFilter;
var filters = new IInputFilter[] { filter1, filter2, nullFilter, filter3, filter2, nullFilter, filter1, filter2 };
editText.SetFilters(filter1, filter2, nullFilter, filter3, filter2, nullFilter, filter1, filter2);
var appliedFilters = editText.GetFilters();
Assert.Equal(filters, appliedFilters);
}