StreamMessageLayoutResolver<S> class

Resolves style properties from an ordered list of style sources for a given StreamMessageLayoutData.

{@tool snippet}

final resolve = StreamMessageLayoutResolver<StreamMessageBubbleStyle>(
  layout,
  [widgetStyle, themeStyle, defaults],
);

final color = resolve((s) => s?.backgroundColor);
final side = resolve.maybeResolve((s) => s?.side);

{@end-tool}

See also:

• StreamMessageLayoutProperty, the resolver type for each field.
• StreamMessageLayoutData, the context passed to each resolver.

Constructors

StreamMessageLayoutResolver(StreamMessageLayoutData _layout, List<S?> _styles)

Creates a resolver that cascades through styles in order.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call<T extends Object>(StreamMessageLayoutProperty<T?>? getProperty(S? style)) → T

Resolves the first non-null value for getProperty across all style sources.

maybeResolve<T extends Object>(StreamMessageLayoutProperty<T?>? getProperty(S? style)) → T?

Resolves the first non-null value for getProperty across all style sources, returning null if none is found.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited