//--------------------------------------------------------------------------------------
/// <summary>
/// HydrateLayout - Take a layout item and turn it into a VarmintWidget
/// </summary>
//--------------------------------------------------------------------------------------
public static VarmintWidget HydrateLayout(IVarmintWidgetInjector injector, LayoutItem widgetLayout, Dictionary <string, LayoutItem> controlLibrary)
{
VarmintWidget output = null;
Action <LayoutItem> applyLayout = (layout) =>
{
foreach (var name in layout.Settings.Keys)
{
switch (name)
{
case "Style":
case "ApplyTo":
output.SetValue(name, layout.Settings[name], true);
break;
default:
output.AddSetting(name, layout.Settings[name]);
break;
}
}
foreach (var childItem in layout.Children)
{
if (childItem.VwmlTag.Contains("."))
{
var parts = childItem.VwmlTag.Split('.');
if (parts.Length > 2)
{
throw new ApplicationException("Property setter specification is too deep. Only one dot allowed! (" + childItem.VwmlTag + ")");
}
var propertyType = output.GetType().GetProperty(parts[1]);
if (childItem.Children.Count == 1) // Only add items with content
{
var hydratedLayout = HydrateLayout(injector, childItem.Children[0], controlLibrary);
if (!propertyType.PropertyType.IsAssignableFrom(hydratedLayout.GetType()))
{
throw new ApplicationException("Property " + childItem.VwmlTag + " cannot be assigned Type " + hydratedLayout.GetType().Name);
}
propertyType.SetValue(output, hydratedLayout);
}
else if (childItem.Children.Count > 1)
{
throw new ApplicationException("Too many child nodes on a property setter. You only get one! (" + childItem.VwmlTag + ")");
}
}
else
{
output.AddChild(HydrateLayout(injector, childItem, controlLibrary), true);
}
}
};
if (controlLibrary.ContainsKey(widgetLayout.VwmlTag))
{
var controlLayout = controlLibrary[widgetLayout.VwmlTag];
if (controlLayout.Settings.ContainsKey("Class"))
{
var controlType = GetWidgetType(controlLayout.Settings["Class"]);
if (!controlType.IsSubclassOf(typeof(VarmintWidgetControl)))
{
throw new ApplicationException("The Class attribute must point to a VarmintWidgetControl");
}
output = (VarmintWidget)Activator.CreateInstance(controlType);
output.EventBindingContext = output;
}
else
{
output = new VarmintWidgetControl();
}
// Controls will get properties from the control layout, but these can
// be overridden later by the local instace of the control
applyLayout(controlLayout);
}
else
{
var nodeType = GetWidgetType(widgetLayout.VwmlTag);
output = (VarmintWidget)Activator.CreateInstance(nodeType);
}
if (widgetLayout.Name != null)
{
output.Name = widgetLayout.Name;
}
foreach (var propertyType in output.GetType().GetProperties())
{
var injectAttribute = (VarmintWidgetInjectAttribute)propertyType.GetCustomAttribute(typeof(VarmintWidgetInjectAttribute));
if (injectAttribute != null)
{
propertyType.SetValue(output,
injector.GetInjectedValue(injectAttribute, propertyType));
}
}
applyLayout(widgetLayout);
return(output);
}
//--------------------------------------------------------------------------------------
/// <summary>
/// HydrateLayout - Take a layout item and turn it into a VarmintWidget
/// </summary>
//--------------------------------------------------------------------------------------
private VarmintWidget HydrateLayout(LayoutItem widgetLayout)
{
VarmintWidget newWidget = null;
// Helper method to apply this layout to the widget we created.
void ApplyLayout(LayoutItem layout)
{
// Get the settings explicitly specified in the layout
foreach (var name in layout.Settings.Keys)
{
switch (name)
{
case "Style":
case "ApplyTo":
newWidget.SetValue(name, layout.Settings[name], true);
break;
default:
newWidget.AddSetting(name, layout.Settings[name]);
break;
}
}
foreach (var childItem in layout.Children)
{
if (childItem.VwmlTag.Contains("."))
{
var parts = childItem.VwmlTag.Split('.');
if (parts.Length > 2)
{
throw new ApplicationException("Property setter specification is too deep. Only one dot allowed! (" + childItem.VwmlTag + ")");
}
var propertyType = newWidget.GetType().GetProperty(parts[1]);
if (childItem.Children.Count == 1) // Only add items with content
{
var hydratedLayout = HydrateLayout(childItem.Children[0]);
if (propertyType != null && !propertyType.PropertyType.IsInstanceOfType(hydratedLayout))
{
throw new ApplicationException("Property " + childItem.VwmlTag + " cannot be assigned Type " + hydratedLayout.GetType().Name);
}
propertyType?.SetValue(newWidget, hydratedLayout);
}
else if (childItem.Children.Count > 1)
{
throw new ApplicationException("Too many child nodes on a property setter. You only get one! (" + childItem.VwmlTag + ")");
}
}
else
{
newWidget.AddChild(HydrateLayout(childItem));
}
}
}
// If the vwmlTag is in the layouts, it must be a control
if (_controlLibrary.ContainsKey(widgetLayout.VwmlTag))
{
var controlLayout = _controlLibrary[widgetLayout.VwmlTag];
// If there is a class that is bound to this control then we bind events to that class
if (controlLayout.Settings.ContainsKey("Class"))
{
var controlType = VarmintWidget.GetWidgetType(controlLayout.Settings["Class"]);
if (!controlType.IsSubclassOf(typeof(VarmintWidgetControl)))
{
throw new ApplicationException("The Class attribute must point to a VarmintWidgetControl");
}
newWidget = (VarmintWidget)Activator.CreateInstance(controlType);
newWidget.ControlHandler = newWidget;
}
else
{
newWidget = new VarmintWidgetControl();
}
// Controls will get properties from the control layout, but these can
// be overridden later by the local instace of the control
ApplyLayout(controlLayout);
}
else
{
var nodeType = VarmintWidget.GetWidgetType(widgetLayout.VwmlTag);
newWidget = (VarmintWidget)Activator.CreateInstance(nodeType);
}
if (widgetLayout.Name != null)
{
newWidget.Name = widgetLayout.Name;
}
// Automatically inject property values if they are injectable
foreach (var propertyType in newWidget.GetType().GetProperties())
{
var injectAttribute = (VarmintWidgetInjectAttribute)propertyType.GetCustomAttribute(typeof(VarmintWidgetInjectAttribute));
if (injectAttribute != null)
{
propertyType.SetValue(newWidget, _injector.GetInjectedValue(injectAttribute, propertyType));
}
}
ApplyLayout(widgetLayout);
return(newWidget);
}
