88 lines
2.5 KiB
Rust
88 lines
2.5 KiB
Rust
use std::collections::HashMap;
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use fxhash::FxBuildHasher;
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use super::{OpSet, OpTree};
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use crate::{
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op_tree::OpTreeInternal,
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storage::load::{DocObserver, LoadedObject},
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types::{ObjId, Op},
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Automerge, OpObserver,
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};
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/// An opset builder which creates an optree for each object as it finishes loading, inserting the
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/// ops using `OpTreeInternal::insert`. This should be faster than using `OpSet::insert_*` but only
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/// works because the ops in the document format are in the same order as in the optrees.
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pub(crate) struct OpSetBuilder {
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completed_objects: HashMap<ObjId, OpTree, FxBuildHasher>,
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}
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impl OpSetBuilder {
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pub(crate) fn new() -> OpSetBuilder {
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Self {
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completed_objects: HashMap::default(),
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}
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}
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}
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impl DocObserver for OpSetBuilder {
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type Output = OpSet;
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fn object_loaded(&mut self, loaded: LoadedObject) {
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let mut internal = OpTreeInternal::new();
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for (index, op) in loaded.ops.into_iter().enumerate() {
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internal.insert(index, op);
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}
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let tree = OpTree {
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internal,
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objtype: loaded.obj_type,
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parent: loaded.parent,
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last_insert: None,
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};
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self.completed_objects.insert(loaded.id, tree);
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}
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fn finish(self, metadata: super::OpSetMetadata) -> Self::Output {
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let len = self.completed_objects.values().map(|t| t.len()).sum();
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OpSet {
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trees: self.completed_objects,
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length: len,
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m: metadata,
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}
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}
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}
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/// A DocObserver which just accumulates ops until the document has finished reconstructing and
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/// then inserts all of the ops using `OpSet::insert_op_with_observer`
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pub(crate) struct ObservedOpSetBuilder<'a, O: OpObserver> {
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observer: &'a mut O,
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ops: Vec<(ObjId, Op)>,
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}
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impl<'a, O: OpObserver> ObservedOpSetBuilder<'a, O> {
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pub(crate) fn new(observer: &'a mut O) -> Self {
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Self {
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observer,
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ops: Vec::new(),
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}
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}
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}
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impl<'a, O: OpObserver> DocObserver for ObservedOpSetBuilder<'a, O> {
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type Output = OpSet;
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fn object_loaded(&mut self, object: LoadedObject) {
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self.ops.reserve(object.ops.len());
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for op in object.ops {
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self.ops.push((object.id, op));
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}
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}
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fn finish(self, _metadata: super::OpSetMetadata) -> Self::Output {
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let mut opset = Automerge::new();
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for (obj, op) in self.ops {
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opset.insert_op_with_observer(&obj, op, self.observer);
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}
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opset.ops
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}
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}
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