snora-widgets 0.21.0

Optional prefab iced widgets for the Snora GUI framework — header, footer, sidebar, menu, icon.
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
147
148
149
150

//! Chip primitives for Snora Design (RFC-032).
//!
//! Two variants:
//!
//! * [`filter`] — a toggle chip for filtering or categorizing. Tinted when
//!   selected, neutral at rest.
//! * [`removable`] — a chip with a separate remove (×) button.
//!
//! Both are backed by `iced::widget::button` and are keyboard-reachable.
//! The application owns selection/filter state.
//!
//! # iced 0.14 focus limitation
//!
//! No custom focus ring — `button::Status` has no `Focused` variant.
//! Documented limitation, not a regression (RFC-025, RFC-027).
//!
//! # Usage
//!
//! ```rust,ignore
//! use snora_design::Tokens;
//! use snora_widgets::design::chip;
//!
//! let tokens = Tokens::light();
//!
//! chip::filter(&tokens, "Draft", self.show_drafts, Message::ToggleDrafts)
//! chip::removable(&tokens, "Tag: Rust", true, Message::ToggleTag, Message::RemoveTag)
//! ```

use iced::{Border, Element, widget::{button, row, text}};
use snora_design::Tokens;

use super::style;

// ---------------------------------------------------------------------------
// Shared style helpers
// ---------------------------------------------------------------------------

fn chip_style_selected(tokens: &Tokens, status: button::Status) -> button::Style {
    // Selected: tinted accent background
    let t = tokens;
    let accent = style::color::to_iced_color(t.palette.accent);
    let bg = match status {
        button::Status::Active   => iced::Color { a: 0.15, ..accent },
        button::Status::Hovered  => iced::Color { a: 0.22, ..accent },
        button::Status::Pressed  => iced::Color { a: 0.30, ..accent },
        button::Status::Disabled => iced::Color { a: 0.06, ..accent },
    };
    button::Style {
        background: Some(bg.into()),
        text_color: style::color::to_iced_color(t.palette.accent),
        border: Border::default()
            .rounded(t.radius.pill)
            .color(accent)
            .width(1.0),
        shadow: iced::Shadow::default(),
        snap: true,
    }
}

fn chip_style_unselected(tokens: &Tokens, status: button::Status) -> button::Style {
    // Unselected: surface background, border-colored outline
    let t = tokens;
    let border_col = style::color::to_iced_color(t.palette.border);
    let text_col   = style::color::to_iced_color(t.palette.text_secondary);
    let surface    = style::color::to_iced_color(t.palette.surface);
    let bg = match status {
        button::Status::Active   => surface,
        button::Status::Hovered  => { let mut c = surface; c.r = (c.r - 0.04).max(0.0); c.g = (c.g - 0.04).max(0.0); c.b = (c.b - 0.04).max(0.0); c }
        button::Status::Pressed  => { let mut c = surface; c.r = (c.r - 0.08).max(0.0); c.g = (c.g - 0.08).max(0.0); c.b = (c.b - 0.08).max(0.0); c }
        button::Status::Disabled => { let mut c = surface; c.a = 0.5; c }
    };
    button::Style {
        background: Some(bg.into()),
        text_color: text_col,
        border: Border::default()
            .rounded(t.radius.pill)
            .color(border_col)
            .width(1.0),
        shadow: iced::Shadow::default(),
        snap: true,
    }
}

// ---------------------------------------------------------------------------
// Public API
// ---------------------------------------------------------------------------

/// A toggle chip for filtering or categorizing content.
///
/// Shows a tinted accent background and accent text when `selected`.
/// Emits `on_toggle` when pressed. Pass `None` to disable.
#[must_use]
pub fn filter<'a, Message: Clone + 'a>(
    tokens: &Tokens,
    label: impl Into<String>,
    selected: bool,
    on_toggle: impl Into<Option<Message>>,
) -> Element<'a, Message> {
    let t = tokens.clone();
    let label_text = label.into();
    let style_fn = if selected { chip_style_selected } else { chip_style_unselected };

    button(
        text(label_text)
            .size(style::text::label_size(tokens)),
    )
    .on_press_maybe(on_toggle.into())
    .padding([tokens.spacing.xs, tokens.spacing.sm])
    .style(move |_theme, status| style_fn(&t, status))
    .into()
}

/// A chip with a separate remove (×) button.
///
/// The chip label toggles via `on_toggle`; the × button emits `on_remove`.
/// Both controls are `iced::widget::button` and are keyboard-reachable.
#[must_use]
pub fn removable<'a, Message: Clone + 'a>(
    tokens: &Tokens,
    label: impl Into<String>,
    selected: bool,
    on_toggle: impl Into<Option<Message>>,
    on_remove: impl Into<Option<Message>>,
) -> Element<'a, Message> {
    let t_label  = tokens.clone();
    let t_remove = tokens.clone();
    let label_text = label.into();
    let style_fn = if selected { chip_style_selected } else { chip_style_unselected };
    let style_fn_rm = if selected { chip_style_selected } else { chip_style_unselected };

    let label_btn: Element<'a, Message> = button(
        text(label_text).size(style::text::label_size(tokens)),
    )
    .on_press_maybe(on_toggle.into())
    .padding([tokens.spacing.xs, tokens.spacing.sm])
    .style(move |_theme, status| style_fn(&t_label, status))
    .into();

    let remove_btn: Element<'a, Message> = button(
        text("×").size(style::text::label_size(tokens)),
    )
    .on_press_maybe(on_remove.into())
    .padding([tokens.spacing.xs, tokens.spacing.xs])
    .style(move |_theme, status| style_fn_rm(&t_remove, status))
    .into();

    row![label_btn, remove_btn]
        .spacing(0)
        .into()
}