1use gpui::{px, rems, Pixels, Rems, WindowContext};
 2use settings::Settings;
 3use theme::{ThemeSettings, UiDensity};
 4
 5use crate::{rems_from_px, BASE_REM_SIZE_IN_PX};
 6
 7#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 8pub enum Spacing {
 9    /// No spacing
10    None,
11    /// Usually a one pixel spacing. Grows to 2px in comfortable density.
12    /// @16px/rem: `1px`|`1px`|`2px`
13    XXSmall,
14    /// Extra small spacing - @16px/rem: `1px`|`2px`|`4px`
15    ///
16    /// Relative to the user's `ui_font_size` and [UiDensity] setting.
17    XSmall,
18    /// Small spacing - @16px/rem: `2px`|`4px`|`6px`
19    ///
20    /// Relative to the user's `ui_font_size` and [UiDensity] setting.
21    Small,
22    /// Medium spacing - @16px/rem: `3px`|`6px`|`8px`
23    ///
24    /// Relative to the user's `ui_font_size` and [UiDensity] setting.
25    Medium,
26    /// Large spacing - @16px/rem: `4px`|`8px`|`10px`
27    ///
28    /// Relative to the user's `ui_font_size` and [UiDensity] setting.
29    Large,
30    XLarge,
31    XXLarge,
32}
33
34impl Spacing {
35    pub fn spacing_ratio(self, cx: &WindowContext) -> f32 {
36        match ThemeSettings::get_global(cx).ui_density {
37            UiDensity::Compact => match self {
38                Spacing::None => 0.,
39                Spacing::XXSmall => 1. / BASE_REM_SIZE_IN_PX,
40                Spacing::XSmall => 1. / BASE_REM_SIZE_IN_PX,
41                Spacing::Small => 2. / BASE_REM_SIZE_IN_PX,
42                Spacing::Medium => 3. / BASE_REM_SIZE_IN_PX,
43                Spacing::Large => 4. / BASE_REM_SIZE_IN_PX,
44                Spacing::XLarge => 8. / BASE_REM_SIZE_IN_PX,
45                Spacing::XXLarge => 12. / BASE_REM_SIZE_IN_PX,
46            },
47            UiDensity::Default => match self {
48                Spacing::None => 0.,
49                Spacing::XXSmall => 1. / BASE_REM_SIZE_IN_PX,
50                Spacing::XSmall => 2. / BASE_REM_SIZE_IN_PX,
51                Spacing::Small => 4. / BASE_REM_SIZE_IN_PX,
52                Spacing::Medium => 6. / BASE_REM_SIZE_IN_PX,
53                Spacing::Large => 8. / BASE_REM_SIZE_IN_PX,
54                Spacing::XLarge => 12. / BASE_REM_SIZE_IN_PX,
55                Spacing::XXLarge => 16. / BASE_REM_SIZE_IN_PX,
56            },
57            UiDensity::Comfortable => match self {
58                Spacing::None => 0.,
59                Spacing::XXSmall => 2. / BASE_REM_SIZE_IN_PX,
60                Spacing::XSmall => 3. / BASE_REM_SIZE_IN_PX,
61                Spacing::Small => 6. / BASE_REM_SIZE_IN_PX,
62                Spacing::Medium => 8. / BASE_REM_SIZE_IN_PX,
63                Spacing::Large => 10. / BASE_REM_SIZE_IN_PX,
64                Spacing::XLarge => 16. / BASE_REM_SIZE_IN_PX,
65                Spacing::XXLarge => 20. / BASE_REM_SIZE_IN_PX,
66            },
67        }
68    }
69
70    pub fn rems(self, cx: &WindowContext) -> Rems {
71        rems(self.spacing_ratio(cx))
72    }
73
74    pub fn px(self, cx: &WindowContext) -> Pixels {
75        let ui_font_size_f32: f32 = ThemeSettings::get_global(cx).ui_font_size.into();
76
77        px(ui_font_size_f32 * self.spacing_ratio(cx))
78    }
79}
80
81pub fn user_spacing_style(cx: &WindowContext) -> UiDensity {
82    ThemeSettings::get_global(cx).ui_density
83}
84
85pub fn custom_spacing(cx: &WindowContext, size: f32) -> Rems {
86    rems_from_px(size * user_spacing_style(cx).spacing_ratio())
87}