/// <summary>
/// 绑定配置。
/// </summary>
/// <param name="bindingSource">绑定源。</param>
/// <param name="binder">绑定委托。</param>
/// <returns>形状候补建造者。</returns>
public ShapeAlterationBuilder BoundAs(string bindingSource, Func <ShapeDescriptor, Func <DisplayContext, IHtmlString> > binder)
{
return(Configure(descriptor =>
{
Func <DisplayContext, IHtmlString> target = null;
var binding = new ShapeBinding
{
ShapeDescriptor = descriptor,
BindingName = _bindingName,
BindingSource = bindingSource,
Binding = displayContext =>
{
if (target == null)
{
target = binder(descriptor);
}
return target(displayContext);
}
};
descriptor.Bindings[_bindingName] = binding;
}));
}
/// <summary>
/// 绑定配置。
/// </summary>
/// <param name="bindingSource">绑定源。</param>
/// <param name="binder">绑定委托。</param>
/// <returns>形状候补建造者。</returns>
public ShapeAlterationBuilder BoundAs(string bindingSource, Func<ShapeDescriptor, Func<DisplayContext, IHtmlString>> binder)
{
return Configure(descriptor =>
{
Func<DisplayContext, IHtmlString> target = null;
var binding = new ShapeBinding
{
ShapeDescriptor = descriptor,
BindingName = _bindingName,
BindingSource = bindingSource,
Binding = displayContext =>
{
if (target == null)
target = binder(descriptor);
return target(displayContext);
}
};
descriptor.Bindings[_bindingName] = binding;
});
}
private static IHtmlString Process(ShapeBinding shapeBinding, IShape shape, DisplayContext context)
{
if (shapeBinding == null || shapeBinding.Binding == null)
{
return shape.Metadata.ChildContent ?? new HtmlString(string.Empty);
}
return CoerceHtmlString(shapeBinding.Binding(context));
}
private static bool TryGetDescriptorBinding(string shapeType, IEnumerable<string> shapeAlternates, ShapeTable shapeTable, out ShapeBinding shapeBinding)
{
foreach (var shapeAlternate in shapeAlternates.Reverse())
{
if (shapeTable.Bindings.TryGetValue(shapeAlternate, out shapeBinding))
{
return true;
}
}
var shapeTypeScan = shapeType;
for (; ; )
{
if (shapeTable.Bindings.TryGetValue(shapeTypeScan, out shapeBinding))
{
return true;
}
var delimiterIndex = shapeTypeScan.LastIndexOf("__", StringComparison.Ordinal);
if (delimiterIndex < 0)
{
return false;
}
shapeTypeScan = shapeTypeScan.Substring(0, delimiterIndex);
}
}
