michiu_ui 0.0.3

The michiu library handles layout and rendering.
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

use crate::{EntityId, LayoutRect, LayoutSize};
use windows::Win32::UI::Input::Ime::HIMC;

#[derive(Clone)]
pub struct WindowStore {
    pub(crate) win_scale_factor: f32,
    pub(crate) win_is_resized: bool,
    pub(crate) win_last_size: Option<LayoutSize>,
    pub(crate) win_default_himc: Option<HIMC>,
}

impl Default for WindowStore {
    fn default() -> Self {
        Self::new()
    }
}

impl WindowStore {
    #[inline]
    #[must_use]
    pub(crate) fn new() -> Self {
        Self {
            win_scale_factor: 1.0,
            win_is_resized: false,
            win_last_size: None,
            win_default_himc: None,
        }
    }

    #[inline]
    pub(crate) fn clear(&mut self) {
        self.win_scale_factor = 1.0;
        self.win_is_resized = false;
        self.win_last_size = None;
        self.win_default_himc = None;
    }

    #[allow(clippy::unused_self)]
    #[inline]
    pub(crate) fn despawn(&mut self, _id: EntityId) {}
}

impl WindowStore {
    /// 与えられたコンテナ矩形の、現在のウィンドウ領域において実際に画面上に見えている物理的な可視サイズを算出
    #[inline]
    pub(crate) fn calc_visible_size(
        container_rect: LayoutRect,
        win_last_size: Option<LayoutSize>,
    ) -> LayoutSize {
        let window_size = win_last_size.unwrap_or_default();

        // 幅または高さにおける可視領域の長さを計算
        let calc_visible_len = |pos: f32, size: f32, max_dim: f32| -> f32 {
            if max_dim > 0.0 {
                let start = pos.max(0.0);
                let end = (pos + size).min(max_dim);
                (end - start).max(0.0)
            } else {
                size
            }
        };

        let width = calc_visible_len(container_rect.x, container_rect.width, window_size.width);
        let height = calc_visible_len(container_rect.y, container_rect.height, window_size.height);

        LayoutSize::new(width, height)
    }

    #[inline]
    pub fn scale_factor_mut(&mut self) -> &mut f32 {
        &mut self.win_scale_factor
    }

    #[inline]
    pub fn default_himc_mut(&mut self) -> &mut Option<HIMC> {
        &mut self.win_default_himc
    }

    #[inline]
    pub fn is_resized_mut(&mut self) -> &mut bool {
        &mut self.win_is_resized
    }

    #[inline]
    pub fn last_size_mut(&mut self) -> &mut Option<LayoutSize> {
        &mut self.win_last_size
    }
}