ContentfulWidgetDetector class

Utility class to detect if a widget or render object contains contentful painting that should trigger FCP (First Contentful Paint) and LCP (Largest Contentful Paint).

Constructors

ContentfulWidgetDetector()

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

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

Static Methods

getContentfulPaintAreaFromFlutterWidget(RenderObject? renderObject) → double

Gets the largest visible area of contentful render objects created by Flutter widgets. For LCP, we need the largest single contentful element, not the sum. Returns 0 if no contentful paint is found.

getVisibleArea(RenderObject renderObject) → double

Gets the visible area of a render object for LCP calculation

hasContentfulChild(Widget widget) → bool

Recursively checks if a widget or its descendants contain contentful painting

hasContentfulPaint(RenderObject? renderObject) → bool

Checks if a RenderObject tree contains any contentful painting

hasContentfulPaintFromFlutterWidget(RenderObject? renderObject) → bool

Checks if a RenderObject tree contains contentful painting, but only checks render objects created by Flutter widgets (not RenderBoxModel or RenderWidget)

isContentfulWidget(Widget widget) → bool

Checks if a widget is considered contentful (including checking children for layout widgets)