/// <summary>
/// The value of pre-cascade property has changed
/// </summary>
/// <param name="Stage"></param>
/// <param name="Property"></param>
private void Property_onChanged(EPropertyStage Stage, ICssProperty Property)
{
SetProperties.SetFlag(Property.CssName.Value, Property.HasValue);
/*if (!Property.HasValue) SetProperties.Remove(Property.CssName);
* else SetProperties.Add(Property.CssName);*/
if (Property.CssName is null)
{
throw new Exception($"Cannot fire onChange events for unnamed property! (Name: {Property.CssName}");
}
StyleDefinition def = CssDefinitions.StyleDefinitions[Property.CssName];
if (def is null)
{
throw new Exception($"Cannot find a definition for Css property: \"{Property.CssName}\"");
}
EPropertyDirtFlags Flags = def.Flags;
StackTrace Stack = null;
#if DEBUG
//stack = new StackTrace(STACK_FRAME_OFFSET, true);
#endif
Property_Changed?.Invoke(Stage, Property, Flags, Stack);
}
/// <summary>
/// Creates a new CSS property definition
/// </summary>
/// <param name="Name">CSS property name</param>
/// <param name="Inherited">Do child elements inherit this value if they are unset?</param>
/// <param name="Flags">Indicates what aspects of an element this property affects</param>
/// <param name="Initial">Default value for the property</param>
/// <param name="Keywords">List of keywords which can be assigned to this property</param>
/// <param name="IsPrivate">If TRUE then this property cannot be set from style-sheets</param>
public StyleDefinition(AtomicName <ECssPropertyID> Name, bool Inherited, EPropertyDirtFlags Flags, CssValue Initial, ECssValueTypes AllowedTypes = 0x0, string[] Keywords = null, bool IsPrivate = false, CssPercentageResolver Percentage_Resolver = null, params Tuple <EPropertyStage, PropertyResolverFunc>[] Resolvers)
{
this.Name = Name;
this.Flags = Flags;
this.IsPrivate = IsPrivate;
this.Inherited = Inherited;
this.Initial = Initial;
this.Percentage_Resolver = Percentage_Resolver;
if (Keywords is null)
{
keywordWhitelist = Array.Empty <string>();
}
else
{
keywordWhitelist = Keywords.ToArray();
}
// Append the specified allowed types to our defaults
this.AllowedTypes |= AllowedTypes;
// Setup our resolver index
foreach (var o in Resolvers)
{
propertyStageResolver[(int)o.Item1] = o.Item2;
}
}
/// <summary>
/// A post-cascade property has changed assigned values
/// </summary>
/// <param name="Property"></param>
/// <param name="Flags"></param>
/// <param name="Stack"></param>
private void Handle_Cascaded_Property_Change(EPropertyStage Stage, ICssProperty Property, EPropertyDirtFlags Flags, StackTrace Stack)
{
bool IsFlow = (Flags & EPropertyDirtFlags.Flow) != 0;// Layout
bool IsBlock = (Flags & EPropertyDirtFlags.Box) != 0;
bool IsVisual = (Flags & EPropertyDirtFlags.Visual) != 0;
bool IsFont = (Flags & EPropertyDirtFlags.Text) != 0;
// If the value that changed was a specified one and it affects the block then we need to update our block
if (IsBlock && Stage >= EPropertyStage.Specified)
{
// Flag us dirty so we can resolve next time its called
SetFlag(EPropertySystemDirtFlags.NeedsToResolveBlock);
// Notify our parent by flagging them aswell
// Owner.Box.Flag(EBoxInvalidationReason.Property_Changed);
// Owner.Box.FlagProperty(Flags);
}
// Update our dirt flags appropriately
if (IsFlow || IsVisual)
{
SetFlag(EPropertySystemDirtFlags.NeedsToResolveBlock);
}
if (IsFont)
{
SetFlag(EPropertySystemDirtFlags.NeedsToResolveFont);
}
//Logging.Log.Info("[Property Changed]: {0}", Prop.FieldName);
onProperty_Change?.Invoke(Property, Flags, Stack);
}
/// <summary>
/// A state-specific property changed, we need to resolve this single property
/// </summary>
private void Handle_Declared_Property_Change(EPropertyStage Stage, ICssProperty Property, EPropertyDirtFlags Flags, StackTrace Origin)
{
/* XXX:
* To be honest cascading here doesnt make sense
* if a declared property changes that wont always change the value of our cascaded property.
* We should check if this property IS the cascaded property and if so then just update that single property!
*/
CascadeProperty(Property);
}