public override object ProvideValue(IServiceProvider serviceProvider)
{
if (this.Key == null && this.KeyBinding == null)
throw new ArgumentException("Either Key or KeyBinding must be set");
if (this.Key != null && this.KeyBinding != null)
throw new ArgumentException("Either Key or KeyBinding must be set, but not both");
if (this.ValueBinding != null && this.ValueBindings != null)
throw new ArgumentException("ValueBinding and ValueBindings may not be set at the same time");
// Most of these conditions are redundent, according to the assertions above. However I'll still state them,
// for clarity.
// A static key, and no values
if (this.Key != null && this.KeyBinding == null && this.ValueBinding == null && this.ValueBindings == null)
{
// Just returning a string!
return Localizer.Translate(this.Key);
}
// A static key, and a single value
if (this.Key != null && this.KeyBinding == null && this.ValueBinding != null && this.ValueBindings == null)
{
var converter = new StaticKeySingleValueConverter() { Key = this.Key, Converter = this.ValueBinding.Converter };
this.ValueBinding.Converter = converter;
return this.ValueBinding.ProvideValue(serviceProvider);
}
// A static key, and multiple values
if (this.Key != null && this.KeyBinding == null && this.ValueBinding == null && this.ValueBindings != null)
{
var converter = new StaticKeyMultipleValuesConverter() { Key = this.Key, Converter = this.ValueBindings.Converter };
this.ValueBindings.Converter = converter;
return this.ValueBindings.ProvideValue(serviceProvider);
}
// A bound key, no values
if (this.Key == null && this.KeyBinding != null && this.ValueBinding == null && this.ValueBindings == null)
{
var converter = new BoundKeyNoValuesConverter() { Converter = this.KeyBinding.Converter };
this.KeyBinding.Converter = converter;
return this.KeyBinding.ProvideValue(serviceProvider);
}
// A bound key, and one value
if (this.Key == null && this.KeyBinding != null && this.ValueBinding != null && this.ValueBindings == null)
{
var converter = new BoundKeyWithValuesConverter();
var multiBinding = new MultiBinding() { Converter = converter };
multiBinding.Bindings.Add(this.KeyBinding);
multiBinding.Bindings.Add(this.ValueBinding);
return multiBinding.ProvideValue(serviceProvider);
}
// A bound key, and multiple values
if (this.Key == null && this.KeyBinding != null && this.ValueBinding == null && this.ValueBindings != null)
{
var converter = new BoundKeyWithValuesConverter() { ValuesConverter = this.ValueBindings.Converter };
this.ValueBindings.Bindings.Insert(0, this.KeyBinding);
this.ValueBindings.Converter = converter;
return this.ValueBindings.ProvideValue(serviceProvider);
}
throw new Exception("Should never get here");
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (this.Key == null && this.KeyBinding == null)
{
throw new ArgumentException("Either Key or KeyBinding must be set");
}
if (this.Key != null && this.KeyBinding != null)
{
throw new ArgumentException("Either Key or KeyBinding must be set, but not both");
}
if (this.ValueBinding != null && this.ValueBindings != null)
{
throw new ArgumentException("ValueBinding and ValueBindings may not be set at the same time");
}
// Most of these conditions are redundent, according to the assertions above. However I'll still state them,
// for clarity.
// A static key, and no values
if (this.Key != null && this.KeyBinding == null && this.ValueBinding == null && this.ValueBindings == null)
{
// Just returning a string!
return(Localizer.Translate(this.Key));
}
// A static key, and a single value
if (this.Key != null && this.KeyBinding == null && this.ValueBinding != null && this.ValueBindings == null)
{
var converter = new StaticKeySingleValueConverter()
{
Key = this.Key, Converter = this.ValueBinding.Converter
};
this.ValueBinding.Converter = converter;
return(this.ValueBinding.ProvideValue(serviceProvider));
}
// A static key, and multiple values
if (this.Key != null && this.KeyBinding == null && this.ValueBinding == null && this.ValueBindings != null)
{
var converter = new StaticKeyMultipleValuesConverter()
{
Key = this.Key, Converter = this.ValueBindings.Converter
};
this.ValueBindings.Converter = converter;
return(this.ValueBindings.ProvideValue(serviceProvider));
}
// A bound key, no values
if (this.Key == null && this.KeyBinding != null && this.ValueBinding == null && this.ValueBindings == null)
{
var converter = new BoundKeyNoValuesConverter()
{
Converter = this.KeyBinding.Converter
};
this.KeyBinding.Converter = converter;
return(this.KeyBinding.ProvideValue(serviceProvider));
}
// A bound key, and one value
if (this.Key == null && this.KeyBinding != null && this.ValueBinding != null && this.ValueBindings == null)
{
var converter = new BoundKeyWithValuesConverter();
var multiBinding = new MultiBinding()
{
Converter = converter
};
multiBinding.Bindings.Add(this.KeyBinding);
multiBinding.Bindings.Add(this.ValueBinding);
return(multiBinding.ProvideValue(serviceProvider));
}
// A bound key, and multiple values
if (this.Key == null && this.KeyBinding != null && this.ValueBinding == null && this.ValueBindings != null)
{
var converter = new BoundKeyWithValuesConverter()
{
ValuesConverter = this.ValueBindings.Converter
};
this.ValueBindings.Bindings.Insert(0, this.KeyBinding);
this.ValueBindings.Converter = converter;
return(this.ValueBindings.ProvideValue(serviceProvider));
}
throw new Exception("Should never get here");
}