freya_core/states/
transform.rs

1use std::sync::{
2    Arc,
3    Mutex,
4};
5
6use freya_native_core::{
7    exports::shipyard::Component,
8    node_ref::NodeView,
9    prelude::{
10        AttributeMaskBuilder,
11        AttributeName,
12        Dependancy,
13        NodeMaskBuilder,
14        State,
15    },
16    NodeId,
17    SendAnyMap,
18};
19use freya_native_core_macro::partial_derive_state;
20
21use crate::{
22    custom_attributes::CustomAttributeValues,
23    dom::CompositorDirtyNodes,
24    parsing::{
25        ParseAttribute,
26        ParseError,
27    },
28};
29
30#[derive(Default, Clone, Debug, Component, PartialEq)]
31pub struct TransformState {
32    pub node_id: NodeId,
33    pub opacities: Vec<f32>,
34    pub rotations: Vec<(NodeId, f32)>,
35    pub scales: Vec<(NodeId, f32, f32)>,
36}
37
38impl ParseAttribute for TransformState {
39    fn parse_attribute(
40        &mut self,
41        attr: freya_native_core::prelude::OwnedAttributeView<CustomAttributeValues>,
42    ) -> Result<(), ParseError> {
43        #[allow(clippy::single_match)]
44        match attr.attribute {
45            AttributeName::Rotate => {
46                if let Some(value) = attr.value.as_text() {
47                    if value.ends_with("deg") {
48                        let rotation = value
49                            .replacen("deg", "", 1)
50                            .parse::<f32>()
51                            .map_err(|_| ParseError)?;
52                        self.rotations.push((self.node_id, rotation));
53                    }
54                }
55            }
56            AttributeName::Opacity => {
57                if let Some(value) = attr.value.as_text() {
58                    let opacity = value.parse::<f32>().map_err(|_| ParseError)?;
59                    self.opacities.push(opacity)
60                }
61            }
62            AttributeName::Scale => {
63                if let Some(value) = attr.value.as_text() {
64                    let (scale_x, scale_y) = if !value.trim().contains(' ') {
65                        let scale = value.parse::<f32>().map_err(|_| ParseError)?;
66                        (scale, scale)
67                    } else {
68                        let Some((scale_x, scale_y)) = value.split_once(' ') else {
69                            return Err(ParseError);
70                        };
71                        let scale_x = scale_x.parse::<f32>().map_err(|_| ParseError)?;
72                        let scale_y = scale_y.parse::<f32>().map_err(|_| ParseError)?;
73                        (scale_x, scale_y)
74                    };
75                    self.scales
76                        .push((self.node_id, scale_x.max(0.), scale_y.max(0.)))
77                }
78            }
79            _ => {}
80        }
81
82        Ok(())
83    }
84}
85
86#[partial_derive_state]
87impl State<CustomAttributeValues> for TransformState {
88    type ParentDependencies = (Self,);
89
90    type ChildDependencies = ();
91
92    type NodeDependencies = ();
93
94    const NODE_MASK: NodeMaskBuilder<'static> =
95        NodeMaskBuilder::new().with_attrs(AttributeMaskBuilder::Some(&[
96            AttributeName::Rotate,
97            AttributeName::Opacity,
98            AttributeName::Scale,
99            AttributeName::AspectRatio,
100            AttributeName::ImageCover,
101        ]));
102
103    fn update<'a>(
104        &mut self,
105        node_view: NodeView<CustomAttributeValues>,
106        _node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
107        parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
108        _children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
109        context: &SendAnyMap,
110    ) -> bool {
111        let root_id = context.get::<NodeId>().unwrap();
112        let compositor_dirty_nodes = context.get::<Arc<Mutex<CompositorDirtyNodes>>>().unwrap();
113        let inherited_transform = parent.map(|(p,)| p.clone()).unwrap_or_default();
114
115        let mut transform_state = TransformState {
116            node_id: node_view.node_id(),
117            ..inherited_transform
118        };
119
120        if let Some(attributes) = node_view.attributes() {
121            for attr in attributes {
122                transform_state.parse_safe(attr);
123            }
124        }
125
126        let changed = transform_state != *self;
127
128        let is_orphan = node_view.height() == 0 && node_view.node_id() != *root_id;
129
130        if changed && !is_orphan {
131            compositor_dirty_nodes
132                .lock()
133                .unwrap()
134                .invalidate(node_view.node_id());
135        }
136
137        *self = transform_state;
138        changed
139    }
140}
freya_core/states/transform.rs

freya_core/states/
transform.rs
