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refactor(ui): Create
ObservableItems(Transaction).
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crates/matrix-sdk-ui/src/timeline/controller/observable_items.rs
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| // Copyright 2024 The Matrix.org Foundation C.I.C. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
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| use std::{ops::Deref, sync::Arc}; | ||
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| use eyeball_im::{ | ||
| ObservableVector, ObservableVectorEntries, ObservableVectorEntry, ObservableVectorTransaction, | ||
| ObservableVectorTransactionEntry, VectorSubscriber, | ||
| }; | ||
| use imbl::Vector; | ||
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| use super::TimelineItem; | ||
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| #[derive(Debug)] | ||
| pub struct ObservableItems { | ||
| items: ObservableVector<Arc<TimelineItem>>, | ||
| } | ||
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| impl ObservableItems { | ||
| pub fn new() -> Self { | ||
| Self { | ||
| // Upstream default capacity is currently 16, which is making | ||
| // sliding-sync tests with 20 events lag. This should still be | ||
| // small enough. | ||
| items: ObservableVector::with_capacity(32), | ||
| } | ||
| } | ||
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| pub fn is_empty(&self) -> bool { | ||
| self.items.is_empty() | ||
| } | ||
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| pub fn subscribe(&self) -> VectorSubscriber<Arc<TimelineItem>> { | ||
| self.items.subscribe() | ||
| } | ||
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| pub fn clone(&self) -> Vector<Arc<TimelineItem>> { | ||
| self.items.clone() | ||
| } | ||
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| pub fn transaction(&mut self) -> ObservableItemsTransaction<'_> { | ||
| ObservableItemsTransaction { items: self.items.transaction() } | ||
| } | ||
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| pub fn set( | ||
| &mut self, | ||
| timeline_item_index: usize, | ||
| timeline_item: Arc<TimelineItem>, | ||
| ) -> Arc<TimelineItem> { | ||
| self.items.set(timeline_item_index, timeline_item) | ||
| } | ||
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| pub fn entries(&mut self) -> ObservableVectorEntries<'_, Arc<TimelineItem>> { | ||
| self.items.entries() | ||
| } | ||
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| pub fn for_each<F>(&mut self, f: F) | ||
| where | ||
| F: FnMut(ObservableVectorEntry<'_, Arc<TimelineItem>>), | ||
| { | ||
| self.items.for_each(f) | ||
| } | ||
| } | ||
|
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| // It's fine to deref to an immutable reference to `Vector`. | ||
| impl Deref for ObservableItems { | ||
| type Target = Vector<Arc<TimelineItem>>; | ||
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| fn deref(&self) -> &Self::Target { | ||
| &self.items | ||
| } | ||
| } | ||
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| #[derive(Debug)] | ||
| pub struct ObservableItemsTransaction<'observable_items> { | ||
| items: ObservableVectorTransaction<'observable_items, Arc<TimelineItem>>, | ||
| } | ||
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| impl<'observable_items> ObservableItemsTransaction<'observable_items> { | ||
| pub fn get(&self, timeline_item_index: usize) -> Option<&Arc<TimelineItem>> { | ||
| self.items.get(timeline_item_index) | ||
| } | ||
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| pub fn set( | ||
| &mut self, | ||
| timeline_item_index: usize, | ||
| timeline_item: Arc<TimelineItem>, | ||
| ) -> Arc<TimelineItem> { | ||
| self.items.set(timeline_item_index, timeline_item) | ||
| } | ||
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| pub fn remove(&mut self, timeline_item_index: usize) -> Arc<TimelineItem> { | ||
| self.items.remove(timeline_item_index) | ||
| } | ||
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| pub fn insert(&mut self, timeline_item_index: usize, timeline_item: Arc<TimelineItem>) { | ||
| self.items.insert(timeline_item_index, timeline_item); | ||
| } | ||
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| pub fn push_front(&mut self, timeline_item: Arc<TimelineItem>) { | ||
| self.items.push_front(timeline_item); | ||
| } | ||
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| pub fn push_back(&mut self, timeline_item: Arc<TimelineItem>) { | ||
| self.items.push_back(timeline_item); | ||
| } | ||
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| pub fn clear(&mut self) { | ||
| self.items.clear(); | ||
| } | ||
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| pub fn for_each<F>(&mut self, f: F) | ||
| where | ||
| F: FnMut(ObservableVectorTransactionEntry<'_, 'observable_items, Arc<TimelineItem>>), | ||
| { | ||
| self.items.for_each(f) | ||
| } | ||
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| pub fn commit(self) { | ||
| self.items.commit() | ||
| } | ||
| } | ||
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| // It's fine to deref to an immutable reference to `Vector`. | ||
| impl<'observable_items> Deref for ObservableItemsTransaction<'observable_items> { | ||
| type Target = Vector<Arc<TimelineItem>>; | ||
|
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| fn deref(&self) -> &Self::Target { | ||
| &self.items | ||
| } | ||
| } |
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