Struct DocumentHistory 

pub struct DocumentHistory { /* private fields */ }

Lazy history paging state for every artifact the app has seen.

Implementations

impl DocumentHistory

pub fn observe_live(&mut self, artifact: ArtifactId, seq: u64)

Note an op that arrived live (or as the joining snapshot).

pub fn on_viewport( &mut self, artifact: ArtifactId, loaded_ops_above_viewport: usize, ) -> Option<CollabRequest>

A history view reports how many loaded ops lie above its viewport; returns the fetch to send when it nears the loaded edge.

pub fn ensure_loaded_back_to( &mut self, artifact: ArtifactId, seq: u64, ) -> Option<CollabRequest>

Something needs history back to seq (an older version, a search hit); returns the first fetch. Later pages follow from Self::on_batch until seq is loaded.

pub fn on_batch( &mut self, artifact: ArtifactId, oldest_seq: Option<u64>, exhausted: bool, ) -> Option<CollabRequest>

Record a scrollback batch; returns the follow-up fetch, if a target is not reached yet.

pub fn pager_for(&self, artifact: ArtifactId) -> Option<&HistoryPager>

Paging state for artifact, if any history was requested.

pub fn reset_in_flight(&mut self)

Forget outstanding requests after a transport reset.

Trait Implementations

impl Debug for DocumentHistory

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

Formats the value using the given formatter.

impl Default for DocumentHistory

fn default() -> DocumentHistory

Returns the “default value” for a type.