/// <inheritdoc/>
protected override SelectorMatch Evaluate(IStyleable control, bool subscribe)
{
if (subscribe)
{
return(new SelectorMatch(control.GetObservable(_property).Select(v => Equals(v ?? string.Empty, _value))));
}
else
{
return(new SelectorMatch((control.GetValue(_property) ?? string.Empty).Equals(_value)));
}
}
protected override SelectorMatch Evaluate(IStyleable control, bool subscribe)
{
if (subscribe)
{
return(new SelectorMatch(new PropertyEqualsActivator(control, _property, _value)));
}
else
{
var result = (control.GetValue(_property) ?? string.Empty).Equals(_value);
return(result ? SelectorMatch.AlwaysThisInstance : SelectorMatch.NeverThisInstance);
}
}
static Thickness Merge(IStyleable control, AvaloniaProperty <Thickness> property, Thickness newValue)
{
var oldValue = control.GetValue <Thickness>(property);
return(new Thickness
(
left: double.IsNaN(newValue.Left) ? oldValue.Left : newValue.Left,
top: double.IsNaN(newValue.Top) ? oldValue.Top : newValue.Top,
right: double.IsNaN(newValue.Right) ? oldValue.Right : newValue.Right,
bottom: double.IsNaN(newValue.Bottom) ? oldValue.Bottom : newValue.Bottom
));
}
protected override SelectorMatch Evaluate(IStyleable control, IStyle?parent, bool subscribe)
{
if (subscribe)
{
return(new SelectorMatch(new PropertyEqualsActivator(control, _property, _value)));
}
else
{
return(Compare(_property.PropertyType, control.GetValue(_property), _value)
? SelectorMatch.AlwaysThisInstance
: SelectorMatch.NeverThisInstance);
}
}
/// <inheritdoc/>
protected override SelectorMatch Evaluate(IStyleable control, bool subscribe)
{
if (!PerspexPropertyRegistry.Instance.IsRegistered(control, _property))
{
return(SelectorMatch.False);
}
else if (subscribe)
{
return(new SelectorMatch(control.GetObservable(_property).Select(v => Equals(v, _value))));
}
else
{
return(new SelectorMatch(control.GetValue(_property).Equals(_value)));
}
}
/// <inheritdoc/>
protected override SelectorMatch Evaluate(IStyleable control, bool subscribe)
{
if (!AvaloniaPropertyRegistry.Instance.IsRegistered(control, _property))
{
return SelectorMatch.False;
}
else if (subscribe)
{
return new SelectorMatch(control.GetObservable(_property).Select(v => Equals(v, _value)));
}
else
{
return new SelectorMatch(control.GetValue(_property).Equals(_value));
}
}