Struct ScrollAnchor 

pub struct ScrollAnchor<K> {
    pub key: K,
    pub offset_in_viewport: u64,
}

A scroll anchor that can be used to preserve visual position across data changes.

Typical use cases:

• chat/timeline “prepend” (load older messages above) without content jumping
• any reorder/replace where you want the viewport to stay anchored to an item identity

The adapter is responsible for providing a stable key and a key_to_index lookup when applying the anchor.

Fields

key: K

offset_in_viewport: u64

The distance from the anchor item’s start to the viewport’s scroll offset.

Trait Implementations

impl<K: Clone> Clone for ScrollAnchor<K>

fn clone(&self) -> ScrollAnchor<K>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K: Debug> Debug for ScrollAnchor<K>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de, K> Deserialize<'de> for ScrollAnchor<K>

where K: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<K: PartialEq> PartialEq for ScrollAnchor<K>

fn eq(&self, other: &ScrollAnchor<K>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<K> Serialize for ScrollAnchor<K>

where K: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<K: Eq> Eq for ScrollAnchor<K>

impl<K> StructuralPartialEq for ScrollAnchor<K>