Crate native_theme_iced

Expand description

iced toolkit connector for native-theme.

Maps native_theme::ResolvedThemeVariant data to iced’s theming system.

§Quick Start

use native_theme_iced::from_preset;

let (theme, resolved) = from_preset("catppuccin-mocha", true).unwrap();

Or from the OS-detected theme:

use native_theme_iced::from_system;

let (theme, resolved, is_dark) = from_system().unwrap();

§Manual Path

For full control over the resolve/validate/convert pipeline:

use native_theme::ThemeSpec;
use native_theme_iced::to_theme;

let nt = ThemeSpec::preset("catppuccin-mocha").unwrap();
let resolved = nt.into_variant(false).unwrap().into_resolved().unwrap();
let theme = to_theme(&resolved, "My App");

§Font Configuration

To use theme fonts with iced widgets, leak the family name to obtain the &'static str required by iced_core::font::Family::Name:

let (_, resolved) = native_theme_iced::from_preset("catppuccin-mocha", true).unwrap();
let name: &'static str = Box::leak(
    native_theme_iced::font_family(&resolved).to_string().into_boxed_str()
);
let font = iced_core::Font {
    family: iced_core::font::Family::Name(name),
    weight: native_theme_iced::to_iced_weight(
        native_theme_iced::font_weight(&resolved)
    ),
    ..Default::default()
};

This is the standard iced pattern for runtime font names. Each leak is ~10-20 bytes and persists for the app lifetime. Call once at theme init, not per-frame.

§Theme Field Coverage

The connector maps a subset of ResolvedThemeVariant to iced’s theming system:

Target	Fields	Source
`Palette` (6 fields)	background, text, primary, success, warning, danger	`defaults.*`
`Extended` overrides (8)	secondary.base.color/text, background.weak.color/text, primary/success/danger/warning.base.text	button.bg/fg, defaults.surface/foreground, `*_foreground`
Widget metrics	button/input padding, border radius, scrollbar width	Per-widget resolved fields
Typography	font family/size/weight, mono family/size/weight, line height	`defaults.font.`, `defaults.mono_font.`
Color helpers	border, link, selection, info, info_foreground, warning_foreground, focus_ring	`defaults.*`
Geometry helpers	spacing (7 tiers), icon_sizes, disabled_opacity	`defaults.*`

Per-widget geometry beyond padding/radius (e.g., min-width, disabled-opacity) is not mapped because iced applies these via inline widget configuration, not through the theme system. Users can read these directly from the ResolvedThemeVariant they pass to to_theme().

Modules§

icons: Icon conversion helpers for iced.
palette: Maps native_theme::ResolvedThemeVariant colors to an iced_core::theme::Palette.

Structs§

ResolvedThemeVariant: A fully resolved theme where every field is guaranteed populated.
Rgba: An sRGB color with alpha, stored as four u8 components.
SystemTheme: Result of the OS-first pipeline. Holds both resolved variants.
ThemeSpec: A complete native theme with a name and optional light/dark variants.
ThemeVariant: A single light or dark theme variant containing all visual properties.

Enums§

AnimatedIcon: An animated icon, either frame-based or transform-based.
DialogButtonOrder: Specifies the order of primary/cancel buttons in dialogs.
Error: Errors that can occur when reading or processing theme data.
IconData: Icon data returned by loading functions.
IconRole: Semantic icon roles for cross-platform icon resolution.
IconSet: Known icon sets that provide platform-specific icon identifiers.
LinuxDesktop: Desktop environments recognized on Linux.
TransformAnimation: A CSS-like transform animation applied to a single icon.

Traits§

IconProvider: Trait for types that map icon identifiers to platform-specific names and SVG data.
SystemThemeExt: Extension trait for converting a SystemTheme to an iced theme.

Functions§

border_color: Returns the border/divider color from the resolved theme.
border_radius: Returns the standard border radius from the resolved theme.
border_radius_lg: Returns the large border radius from the resolved theme.
button_padding: Returns button padding from the resolved theme as an iced Padding.
disabled_opacity: Returns the disabled control opacity from the resolved theme.
focus_ring_color: Returns the focus ring indicator color from the resolved theme.
font_family: Returns the primary UI font family name from the resolved theme.
font_size: Returns the primary UI font size in logical pixels from the resolved theme.
font_weight: Returns the primary UI font weight (CSS 100-900) from the resolved theme.
from_preset: Load a bundled preset and convert it to an iced Theme in one call.
from_system: Detect the OS theme and convert it to an iced Theme in one call.
icon_sizes: Returns a reference to the per-context icon sizes from the resolved theme.
info_color: Returns the info/attention color from the resolved theme.
info_foreground_color: Returns the text color for info-colored backgrounds from the resolved theme.
input_padding: Returns text input padding from the resolved theme as an iced Padding.
line_height_multiplier: Returns the line height multiplier from the resolved theme.
link_color: Returns the hyperlink color from the resolved theme.
mono_font_family: Returns the monospace font family name from the resolved theme.
mono_font_size: Returns the monospace font size in logical pixels from the resolved theme.
mono_font_weight: Returns the monospace font weight (CSS 100-900) from the resolved theme.
scrollbar_width: Returns the scrollbar groove width from the resolved theme.
selection_color: Returns the selection highlight background color from the resolved theme.
to_iced_weight: Convert a CSS font weight (100-900) to an iced Weight enum.
to_theme: Create an iced iced_core::theme::Theme from a native_theme::ResolvedThemeVariant.
warning_foreground_color: Returns the warning foreground text color from the resolved theme.

Type Aliases§

Result: Convenience Result type alias for this crate.