bevy_mod_props 2.0.0

Bevy utilities for high-specificity programming.
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
154
155
156
157
158
159

use bevy_ecs::{
    entity::{Entity, EntityHashMap, EntityHashSet},
    system::EntityCommands,
    world::{EntityMut, EntityRef, EntityWorldMut},
};
use estr::Estr;

use super::Links;

// -----------------------------------------------------------------------------
// Immutable links access

pub trait LinksExt {
    fn get_linked(&self, name: impl Into<Estr>) -> Option<Entity>;

    fn list_linked(&self, name: impl Into<Estr>) -> EntityHashSet;

    fn is_linked(&self, name: impl Into<Estr>, target: Entity) -> bool;
}

impl<'w> LinksExt for EntityRef<'w> {
    fn get_linked(&self, name: impl Into<Estr>) -> Option<Entity> {
        self.get::<Links>()?.get(name)
    }

    fn list_linked(&self, name: impl Into<Estr>) -> EntityHashSet {
        match self.get::<Links>() {
            Some(links) => links.list(name),
            None => EntityHashSet::default(),
        }
    }

    fn is_linked(&self, name: impl Into<Estr>, target: Entity) -> bool {
        match self.get::<Links>() {
            Some(links) => links.is_linked(name, target),
            None => false,
        }
    }
}

impl<'w> LinksExt for EntityWorldMut<'w> {
    fn get_linked(&self, name: impl Into<Estr>) -> Option<Entity> {
        self.get::<Links>()?.get(name)
    }

    fn list_linked(&self, name: impl Into<Estr>) -> EntityHashSet {
        match self.get::<Links>() {
            Some(links) => links.list(name),
            None => EntityHashSet::default(),
        }
    }

    fn is_linked(&self, name: impl Into<Estr>, target: Entity) -> bool {
        match self.get::<Links>() {
            Some(links) => links.is_linked(name, target),
            None => false,
        }
    }
}

// -----------------------------------------------------------------------------
// Link commands

pub trait LinksCommandsExt {
    fn set_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self;

    fn add_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self;

    fn remove_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self;

    fn clear_links(&mut self, name: impl Into<Estr>) -> &mut Self;
}

impl<'w> LinksCommandsExt for EntityWorldMut<'w> {
    fn set_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        self.entry::<Links>()
            .or_default()
            .into_mut()
            .set(name, target);
        self
    }

    fn add_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        self.entry::<Links>()
            .or_default()
            .into_mut()
            .add(name, target);
        self
    }

    fn remove_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        self.entry::<Links>()
            .or_default()
            .into_mut()
            .remove(name, target);
        self
    }

    fn clear_links(&mut self, name: impl Into<Estr>) -> &mut Self {
        self.entry::<Links>().or_default().into_mut().clear(name);
        self
    }
}

impl<'a> LinksCommandsExt for EntityCommands<'a> {
    fn set_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        let name = name.into();
        self.queue(move |mut entity: EntityWorldMut| {
            entity.set_link(name, target);
        })
    }

    fn add_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        let name = name.into();
        self.queue(move |mut entity: EntityWorldMut| {
            entity.add_link(name, target);
        })
    }

    fn remove_link(&mut self, name: impl Into<Estr>, target: Entity) -> &mut Self {
        let name = name.into();
        self.queue(move |mut entity: EntityWorldMut| {
            entity.remove_link(name, target);
        })
    }

    fn clear_links(&mut self, name: impl Into<Estr>) -> &mut Self {
        let name = name.into();
        self.queue(move |mut entity: EntityWorldMut| {
            entity.clear_links(name);
        })
    }
}

// -----------------------------------------------------------------------------
// Link following

pub trait LinksFollowExt<'w>: Sized {
    fn follow_link(self, name: impl Into<Estr>) -> Option<Self>;

    fn explore_link(self, name: impl Into<Estr>) -> EntityHashMap<EntityMut<'w>>;
}

impl<'w> LinksFollowExt<'w> for EntityWorldMut<'w> {
    fn follow_link(self, name: impl Into<Estr>) -> Option<Self> {
        let target = self.get_linked(name)?;
        let world = self.into_world_mut();
        world.get_entity_mut(target).ok()
    }

    fn explore_link(self, name: impl Into<Estr>) -> EntityHashMap<EntityMut<'w>> {
        let targets = self.list_linked(name);
        let world = self.into_world_mut();
        match world.get_entity_mut(&targets) {
            Ok(entities) => entities,
            Err(_) => EntityHashMap::default(),
        }
    }
}