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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
use std::sync::{
    Arc,
    Mutex,
};

use freya_native_core::{
    attributes::AttributeName,
    exports::shipyard::Component,
    node::OwnedAttributeValue,
    node_ref::NodeView,
    prelude::{
        AttributeMaskBuilder,
        Dependancy,
        NodeMaskBuilder,
        OwnedAttributeView,
        State,
    },
    NodeId,
    SendAnyMap,
};
use freya_native_core_macro::partial_derive_state;
use torin::prelude::*;

use crate::{
    CustomAttributeValues,
    NodeReference,
    Parse,
    ParseAttribute,
    ParseError,
};

#[derive(Default, Clone, Debug, Component, PartialEq)]
pub struct LayoutState {
    pub width: Size,
    pub height: Size,
    pub minimum_width: Size,
    pub minimum_height: Size,
    pub maximum_height: Size,
    pub maximum_width: Size,
    pub padding: Gaps,
    pub margin: Gaps,
    pub direction: DirectionMode,
    pub offset_y: Length,
    pub offset_x: Length,
    pub main_alignment: Alignment,
    pub cross_alignment: Alignment,
    pub position: Position,
    pub content: Content,
    pub node_ref: Option<NodeReference>,
    pub node_id: NodeId,
}

impl ParseAttribute for LayoutState {
    fn parse_attribute(
        &mut self,
        attr: OwnedAttributeView<CustomAttributeValues>,
    ) -> Result<(), ParseError> {
        match attr.attribute {
            AttributeName::Width => {
                if let Some(value) = attr.value.as_text() {
                    self.width = Size::parse(value)?;
                }
            }
            AttributeName::Height => {
                if let Some(value) = attr.value.as_text() {
                    self.height = Size::parse(value)?;
                }
            }
            AttributeName::MinHeight => {
                if let Some(value) = attr.value.as_text() {
                    self.minimum_height = Size::parse(value)?;
                }
            }
            AttributeName::MinWidth => {
                if let Some(value) = attr.value.as_text() {
                    self.minimum_width = Size::parse(value)?;
                }
            }
            AttributeName::MaxHeight => {
                if let Some(value) = attr.value.as_text() {
                    self.maximum_height = Size::parse(value)?;
                }
            }
            AttributeName::MaxWidth => {
                if let Some(value) = attr.value.as_text() {
                    self.maximum_width = Size::parse(value)?;
                }
            }
            AttributeName::Padding => {
                if let Some(value) = attr.value.as_text() {
                    self.padding = Gaps::parse(value)?;
                }
            }
            AttributeName::Margin => {
                if let Some(value) = attr.value.as_text() {
                    self.margin = Gaps::parse(value)?;
                }
            }
            AttributeName::Direction => {
                if let Some(value) = attr.value.as_text() {
                    self.direction = match value {
                        "horizontal" => DirectionMode::Horizontal,
                        _ => DirectionMode::Vertical,
                    }
                }
            }
            AttributeName::OffsetY => {
                if let Some(value) = attr.value.as_text() {
                    self.offset_y = Length::new(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::OffsetX => {
                if let Some(value) = attr.value.as_text() {
                    self.offset_x = Length::new(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::MainAlign => {
                if let Some(value) = attr.value.as_text() {
                    self.main_alignment = Alignment::parse(value)?;
                }
            }
            AttributeName::CrossAlign => {
                if let Some(value) = attr.value.as_text() {
                    self.cross_alignment = Alignment::parse(value)?;
                }
            }
            AttributeName::Position => {
                if let Some(value) = attr.value.as_text() {
                    if self.position.is_empty() {
                        self.position = Position::parse(value)?;
                    }
                }
            }
            AttributeName::PositionTop => {
                if let Some(value) = attr.value.as_text() {
                    self.position
                        .set_top(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::PositionRight => {
                if let Some(value) = attr.value.as_text() {
                    self.position
                        .set_right(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::PositionBottom => {
                if let Some(value) = attr.value.as_text() {
                    self.position
                        .set_bottom(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::PositionLeft => {
                if let Some(value) = attr.value.as_text() {
                    self.position
                        .set_left(value.parse::<f32>().map_err(|_| ParseError)?);
                }
            }
            AttributeName::Content => {
                if let Some(value) = attr.value.as_text() {
                    self.content = Content::parse(value)?;
                }
            }
            AttributeName::Reference => {
                if let OwnedAttributeValue::Custom(CustomAttributeValues::Reference(reference)) =
                    attr.value
                {
                    self.node_ref = Some(reference.clone());
                }
            }
            _ => {}
        }
        Ok(())
    }
}

#[partial_derive_state]
impl State<CustomAttributeValues> for LayoutState {
    type ParentDependencies = ();

    type ChildDependencies = ();

    type NodeDependencies = ();

    const NODE_MASK: NodeMaskBuilder<'static> =
        NodeMaskBuilder::new().with_attrs(AttributeMaskBuilder::Some(&[
            AttributeName::Width,
            AttributeName::Height,
            AttributeName::MinWidth,
            AttributeName::MinHeight,
            AttributeName::MaxWidth,
            AttributeName::MaxHeight,
            AttributeName::Padding,
            AttributeName::Direction,
            AttributeName::OffsetX,
            AttributeName::OffsetY,
            AttributeName::MainAlign,
            AttributeName::CrossAlign,
            AttributeName::Reference,
            AttributeName::Margin,
            AttributeName::Position,
            AttributeName::PositionTop,
            AttributeName::PositionRight,
            AttributeName::PositionBottom,
            AttributeName::PositionLeft,
            AttributeName::Content,
        ]));

    fn update<'a>(
        &mut self,
        node_view: NodeView<CustomAttributeValues>,
        _node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
        _parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
        _children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
        context: &SendAnyMap,
    ) -> bool {
        let torin_layout = context.get::<Arc<Mutex<Torin<NodeId>>>>().unwrap();

        let mut layout = LayoutState {
            node_id: node_view.node_id(),
            ..Default::default()
        };

        if let Some(attributes) = node_view.attributes() {
            for attr in attributes {
                layout.parse_safe(attr);
            }
        }

        let changed = layout != *self;

        if changed {
            torin_layout.lock().unwrap().invalidate(node_view.node_id());
        }

        *self = layout;
        changed
    }
}