beuvy 0.1.0

Facade crate for beuvy-runtime plus optional declarative UI authoring.
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use super::expression::evaluate_runtime_expr;
use crate::ast::DeclarativeConditionExpr;
use crate::runtime::context::resolve_path;
use crate::runtime::state::{
    DeclarativeLocalState, DeclarativeRefRects, DeclarativeRootComputedLocals,
    DeclarativeRootViewModel, DeclarativeUiRuntimeValues,
};
use crate::value::UiValue;
use bevy::prelude::*;

pub(super) fn resolve_runtime_condition(
    entity: Entity,
    expr: &DeclarativeConditionExpr,
    parents: &Query<&ChildOf>,
    states: &Query<&DeclarativeLocalState>,
    computed: &Query<&DeclarativeRootComputedLocals>,
    roots: &Query<&DeclarativeRootViewModel>,
    values: &DeclarativeUiRuntimeValues,
    ref_rects: &DeclarativeRefRects,
) -> bool {
    match expr {
        DeclarativeConditionExpr::Binding(path) => resolve_runtime_path(
            entity, path, parents, states, computed, roots, values, ref_rects,
        )
        .and_then(|value| value.bool())
        .unwrap_or(false),
        DeclarativeConditionExpr::Equals { name, value } => resolve_runtime_path(
            entity, name, parents, states, computed, roots, values, ref_rects,
        )
        .is_some_and(|candidate| candidate == UiValue::from_literal(value)),
    }
}

pub fn resolve_runtime_path(
    entity: Entity,
    path: &str,
    parents: &Query<&ChildOf>,
    states: &Query<&DeclarativeLocalState>,
    computed: &Query<&DeclarativeRootComputedLocals>,
    roots: &Query<&DeclarativeRootViewModel>,
    values: &DeclarativeUiRuntimeValues,
    ref_rects: &DeclarativeRefRects,
) -> Option<UiValue> {
    let mut stack = Vec::new();
    resolve_runtime_path_with_extra_locals(
        entity, path, None, parents, states, computed, roots, values, ref_rects, &mut stack,
    )
}

pub(crate) fn resolve_runtime_path_with_extra_locals(
    entity: Entity,
    path: &str,
    extra_locals: Option<&std::collections::HashMap<String, UiValue>>,
    parents: &Query<&ChildOf>,
    states: &Query<&DeclarativeLocalState>,
    computed: &Query<&DeclarativeRootComputedLocals>,
    roots: &Query<&DeclarativeRootViewModel>,
    values: &DeclarativeUiRuntimeValues,
    ref_rects: &DeclarativeRefRects,
    stack: &mut Vec<String>,
) -> Option<UiValue> {
    if path == "props" {
        let mut current = Some(entity);
        while let Some(candidate) = current {
            if let Ok(root) = roots.get(candidate) {
                return Some(root.0.clone());
            }
            current = parents.get(candidate).ok().map(ChildOf::parent);
        }
        return None;
    }
    let path = path.strip_prefix("props.").unwrap_or(path);
    if let Some(extra_locals) = extra_locals {
        if let Some(value) = extra_locals.get(path) {
            return Some(value.clone());
        }
        if let Some((head, tail)) = path.split_once('.')
            && let Some(value) = extra_locals.get(head)
            && let Some(value) = resolve_path(value, tail)
        {
            return Some(value.clone());
        }
    }
    let mut current = Some(entity);
    while let Some(candidate) = current {
        if let Ok(local_state) = states.get(candidate)
            && let Some(value) = local_state.0.get(path)
        {
            return Some(value.clone());
        }
        if let Some((head, tail)) = path.split_once('.')
            && let Ok(local_state) = states.get(candidate)
            && let Some(value) = local_state.0.get(head)
            && let Some(value) = resolve_path(value, tail)
        {
            return Some(value.clone());
        }
        if let Ok(root_computed) = computed.get(candidate)
            && let Some(value) = resolve_computed_path(
                candidate,
                path,
                parents,
                states,
                computed,
                roots,
                values,
                ref_rects,
                root_computed,
                stack,
            )
        {
            return Some(value);
        }
        if let Ok(root) = roots.get(candidate)
            && let Some(value) = resolve_path(&root.0, path)
        {
            return Some(value.clone());
        }
        current = parents.get(candidate).ok().map(ChildOf::parent);
    }
    values.get(path).cloned()
}

fn resolve_computed_path(
    entity: Entity,
    path: &str,
    parents: &Query<&ChildOf>,
    states: &Query<&DeclarativeLocalState>,
    computed: &Query<&DeclarativeRootComputedLocals>,
    roots: &Query<&DeclarativeRootViewModel>,
    values: &DeclarativeUiRuntimeValues,
    ref_rects: &DeclarativeRefRects,
    root_computed: &DeclarativeRootComputedLocals,
    stack: &mut Vec<String>,
) -> Option<UiValue> {
    let (head, tail) = path
        .split_once('.')
        .map_or((path, None), |(head, tail)| (head, Some(tail)));
    let expr = root_computed.0.get(head)?;
    if stack.iter().any(|name| name == head) {
        return None;
    }
    stack.push(head.to_string());
    let value = evaluate_runtime_expr(
        entity, expr, parents, states, computed, roots, values, ref_rects, stack,
    );
    stack.pop();
    let value = value?;
    match tail {
        Some(tail) => resolve_path(&value, tail).cloned(),
        None => Some(value),
    }
}