cranpose-foundation 0.0.60

Modifiers, nodes, and foundation elements for Cranpose
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

//! Helper macros to reduce boilerplate when implementing modifier nodes.
//!
//! These helpers follow the Jetpack Compose pattern where setting capability
//! bits + implementing the specialized trait is enough for the node to participate
//! in the corresponding pipeline stage.

/// Implements the as_draw_node methods for a type that implements DrawModifierNode.
///
/// # Example
///
/// ```text
/// impl ModifierNode for MyNode {
///     impl_draw_node!();
/// }
/// ```
#[macro_export]
macro_rules! impl_draw_node {
    () => {
        fn as_draw_node(&self) -> Option<&dyn $crate::DrawModifierNode> {
            Some(self)
        }

        fn as_draw_node_mut(&mut self) -> Option<&mut dyn $crate::DrawModifierNode> {
            Some(self)
        }
    };
}

/// Implements the as_pointer_input_node methods for a type that implements PointerInputNode.
///
/// # Example
///
/// ```text
/// impl ModifierNode for MyNode {
///     impl_pointer_input_node!();
/// }
/// ```
#[macro_export]
macro_rules! impl_pointer_input_node {
    () => {
        fn as_pointer_input_node(&self) -> Option<&dyn $crate::PointerInputNode> {
            Some(self)
        }

        fn as_pointer_input_node_mut(&mut self) -> Option<&mut dyn $crate::PointerInputNode> {
            Some(self)
        }
    };
}

/// Implements the as_semantics_node methods for a type that implements SemanticsNode.
///
/// # Example
///
/// ```text
/// impl ModifierNode for MyNode {
///     impl_semantics_node!();
/// }
/// ```
#[macro_export]
macro_rules! impl_semantics_node {
    () => {
        fn as_semantics_node(&self) -> Option<&dyn $crate::SemanticsNode> {
            Some(self)
        }

        fn as_semantics_node_mut(&mut self) -> Option<&mut dyn $crate::SemanticsNode> {
            Some(self)
        }
    };
}

/// Implements the as_focus_node methods for a type that implements FocusNode.
///
/// # Example
///
/// ```text
/// impl ModifierNode for MyNode {
///     impl_focus_node!();
/// }
/// ```
#[macro_export]
macro_rules! impl_focus_node {
    () => {
        fn as_focus_node(&self) -> Option<&dyn $crate::FocusNode> {
            Some(self)
        }

        fn as_focus_node_mut(&mut self) -> Option<&mut dyn $crate::FocusNode> {
            Some(self)
        }
    };
}

/// Comprehensive macro that implements all capability-based methods for a modifier node.
///
/// This macro reduces boilerplate by automatically implementing the as_* methods
/// for all specialized traits that the type implements. Use this as the primary
/// way to declare which traits your node implements.
///
/// # Example
///
/// ```text
/// impl ModifierNode for MyDrawNode {
///     impl_modifier_node!(draw);
/// }
///
/// impl ModifierNode for MyPointerNode {
///     impl_modifier_node!(pointer_input);
/// }
///
/// impl ModifierNode for MyComplexNode {
///     impl_modifier_node!(draw, pointer_input, semantics);
/// }
/// ```
#[macro_export]
macro_rules! impl_modifier_node {
    (draw) => {
        $crate::impl_draw_node!();
    };
    (pointer_input) => {
        $crate::impl_pointer_input_node!();
    };
    (semantics) => {
        $crate::impl_semantics_node!();
    };
    (focus) => {
        $crate::impl_focus_node!();
    };
    (draw, $($rest:tt)*) => {
        $crate::impl_draw_node!();
        $crate::impl_modifier_node!($($rest)*);
    };
    (pointer_input, $($rest:tt)*) => {
        $crate::impl_pointer_input_node!();
        $crate::impl_modifier_node!($($rest)*);
    };
    (semantics, $($rest:tt)*) => {
        $crate::impl_semantics_node!();
        $crate::impl_modifier_node!($($rest)*);
    };
    (focus, $($rest:tt)*) => {
        $crate::impl_focus_node!();
        $crate::impl_modifier_node!($($rest)*);
    };
}