vertigo 0.2.0-alpha

Reactive Real-DOM library for Rust
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117

use std::collections::BTreeSet;

use crate::{computed::graph_id::GraphId, struct_mut::ValueMut};

use super::hook::Hooks;

enum State {
    Idle,
    Modification {
        //Modifying the first layer
        level: u16,               //current transacion level
        client_ids: BTreeSet<GraphId>,
    },
    Refreshing,
}

impl Default for State {
    fn default() -> Self {
        Self::Idle
    }
}

pub struct TransactionState {
    state: ValueMut<State>,
    pub(crate) hooks: Hooks,
}

impl TransactionState {
    pub fn new() -> TransactionState {
        TransactionState {
            state: ValueMut::new(State::Idle),
            hooks: Hooks::new(),
        }
    }

    pub fn up(&self) {
        let TransactionState { state, hooks: _ } = self;

        state.move_to_void(move |state| {
            match state {
                State::Idle => {
                    State::Modification {
                        level: 1,
                        client_ids: BTreeSet::new(),
                    }
                }
                State::Modification { mut level, client_ids } => {
                    level += 1;
                    State::Modification { level, client_ids }
                }
                State::Refreshing => {
                    panic!("You cannot change the source value while the dependency graph is being refreshed");
                }
            }
        })
    }

    pub fn down(&self) -> Option<BTreeSet<GraphId>> {
        self.state.move_to(|state| -> (State, Option<BTreeSet<GraphId>>) {
            match state {
                State::Idle => {
                    log::error!("You cannot call 'down' for a state 'TransactionState::Idle'");

                    (State::Idle, None)
                }
                State::Modification { mut level, client_ids } => {
                    level -= 1;

                    if level == 0 {
                        return (State::Refreshing, Some(client_ids));
                    }

                    (State::Modification { level, client_ids }, None)
                }
                State::Refreshing => {
                    log::error!("You cannot change the source value while the dependency graph is being refreshed");

                    (State::Refreshing, None)
                }
            }
        })
    }

    pub fn move_to_idle(&self) {
        let TransactionState { state, hooks } = self;

        state.move_to_void(move |state| {
            match state {
                State::Idle => {
                    log::error!("you cannot go from 'TransactionState::Idle' to 'TransactionState::Idle'");
                    State::Idle
                }
                State::Modification { level, client_ids } => {
                    log::error!("you cannot go from 'TransactionState::Modification' to 'TransactionState::Idle'");
                    State::Modification { level, client_ids }
                }
                State::Refreshing => {
                    hooks.fire_end();
                    State::Idle
                }
            }
        });
    }

    pub fn add_clients_to_refresh(&self, client: BTreeSet<GraphId>) {
        self.state.change(move |mut state| {
            match &mut state {
                State::Modification { client_ids, .. } => {
                    client_ids.extend(client.into_iter());
                }
                _ => {
                    log::error!("You can only call the trigger if you are in a transaction block");
                }
            }
        })
    }
}