dioxus_stores/impls/
slice.rs

1use std::iter::FusedIterator;
2
3use crate::{impls::index::IndexWrite, store::Store};
4use dioxus_signals::{Readable, ReadableExt};
5
6impl<Lens, I> Store<Vec<I>, Lens>
7where
8    Lens: Readable<Target = Vec<I>> + 'static,
9    I: 'static,
10{
11    /// Returns the length of the slice. This will only track the shallow state of the slice.
12    /// It will only cause a re-run if the length of the slice could change.
13    ///
14    /// # Example
15    /// ```rust, no_run
16    /// use dioxus_stores::*;
17    /// let store = use_store(|| vec![1, 2, 3]);
18    /// assert_eq!(store.len(), 3);
19    /// ```
20    pub fn len(&self) -> usize {
21        self.selector().track_shallow();
22        self.selector().peek().len()
23    }
24
25    /// Checks if the slice is empty. This will only track the shallow state of the slice.
26    /// It will only cause a re-run if the length of the slice could change.
27    ///
28    /// # Example
29    /// ```rust, no_run
30    /// use dioxus_stores::*;
31    /// let store = use_store(|| vec![1, 2, 3]);
32    /// assert!(!store.is_empty());
33    /// ```
34    pub fn is_empty(&self) -> bool {
35        self.selector().track_shallow();
36        self.selector().peek().is_empty()
37    }
38
39    /// Returns an iterator over the items in the slice. This will only track the shallow state of the slice.
40    /// It will only cause a re-run if the length of the slice could change.
41    /// # Example
42    /// ```rust, no_run
43    /// use dioxus_stores::*;
44    /// let store = use_store(|| vec![1, 2, 3]);
45    /// for item in store.iter() {
46    ///     println!("{}", item);
47    /// }
48    /// ```
49    pub fn iter(
50        &self,
51    ) -> impl ExactSizeIterator<Item = Store<I, IndexWrite<usize, Lens>>>
52           + DoubleEndedIterator
53           + FusedIterator
54           + '_
55    where
56        Lens: Clone,
57    {
58        (0..self.len()).map(move |i| self.clone().index(i))
59    }
60
61    /// Try to get an item from slice. This will only track the shallow state of the slice.
62    /// It will only cause a re-run if the length of the slice could change. The new store
63    /// will only update when the item at the index changes.
64    ///
65    /// # Example
66    /// ```rust, no_run
67    /// use dioxus_stores::*;
68    /// let store = use_store(|| vec![1, 2, 3]);
69    /// let indexed_store = store.get(1).unwrap();
70    /// // The indexed store can access the store methods of the indexed store.
71    /// assert_eq!(indexed_store(), 2);
72    /// ```
73    pub fn get(&self, index: usize) -> Option<Store<I, IndexWrite<usize, Lens>>>
74    where
75        Lens: Clone,
76    {
77        if index >= self.len() {
78            None
79        } else {
80            Some(self.clone().index(index))
81        }
82    }
83}
dioxus_stores/impls/slice.rs

dioxus_stores/impls/
slice.rs
