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

pub use euclid::Rect;

use crate::{
    alignment::Alignment, direction::DirectionMode, gaps::Gaps, geometry::Length,
    prelude::Position, size::Size,
};

/// Node layout configuration
#[derive(PartialEq, Clone, Debug, Default)]
pub struct Node {
    /// Dimentions
    pub width: Size,
    pub height: Size,

    // Minimum dimensions
    pub minimum_width: Size,
    pub minimum_height: Size,

    // Maximum dimensions
    pub maximum_width: Size,
    pub maximum_height: Size,

    // Axis alignments for the children
    pub main_alignment: Alignment,
    pub cross_alignment: Alignment,

    /// Inner padding
    pub padding: Gaps,

    /// Inner margin
    pub margin: Gaps,

    /// Inner position offsets
    pub offset_x: Length,
    pub offset_y: Length,

    /// Direction in which it's inner Nodes will be stacked
    pub direction: DirectionMode,

    pub position: Position,

    /// A Node might depend on inner sizes but have a fixed position, like scroll views.
    pub has_layout_references: bool,
}

impl Node {
    /// Create a Node with the default values
    pub fn new() -> Self {
        Self::default()
    }

    /// Construct a new Node given a size and a direction
    pub fn from_size_and_direction(width: Size, height: Size, direction: DirectionMode) -> Self {
        Self {
            width,
            height,
            direction,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size and a scroll
    pub fn from_size_and_scroll(
        width: Size,
        height: Size,
        offset_x: Length,
        offset_y: Length,
    ) -> Self {
        Self {
            width,
            height,
            offset_x,
            offset_y,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size and padding
    pub fn from_size_and_padding(width: Size, height: Size, padding: Gaps) -> Self {
        Self {
            width,
            height,
            padding,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size, alignments and a direction
    pub fn from_size_and_alignments_and_direction(
        width: Size,
        height: Size,
        main_alignment: Alignment,
        cross_alignment: Alignment,
        direction: DirectionMode,
    ) -> Self {
        Self {
            width,
            height,
            main_alignment,
            cross_alignment,
            direction,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size and a direction
    pub fn from_size_and_margin(width: Size, height: Size, margin: Gaps) -> Self {
        Self {
            width,
            height,
            margin,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size and a direction and some margin,
    pub fn from_size_and_direction_and_margin(
        width: Size,
        height: Size,
        direction: DirectionMode,
        margin: Gaps,
    ) -> Self {
        Self {
            width,
            height,
            direction,
            margin,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size, alignments and a direction
    pub fn from_size_and_alignments_and_direction_and_padding(
        width: Size,
        height: Size,
        main_alignment: Alignment,
        cross_alignment: Alignment,
        direction: DirectionMode,
        padding: Gaps,
    ) -> Self {
        Self {
            width,
            height,
            main_alignment,
            cross_alignment,
            direction,
            padding,
            ..Default::default()
        }
    }

    /// Construct a new Node given a size and a position
    pub fn from_size_and_position(width: Size, height: Size, position: Position) -> Self {
        Self {
            width,
            height,
            position,
            ..Default::default()
        }
    }

    /// Has properties that depend on the inner Nodes?
    pub fn does_depend_on_inner(&self) -> bool {
        Size::Inner == self.width
            || Size::Inner == self.height
            || self.has_layout_references
            || self.cross_alignment.is_not_start()
            || self.main_alignment.is_not_start()
    }
}