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Implement the Pico CSS theme editor.

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This commit is contained in:
Chili Palmer
2026-07-20 14:28:47 +02:00
parent 1d190d33c5
commit fe7dd82f33
20 changed files with 1033 additions and 161 deletions
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406
crates/bds-ui/src/views/style_view.rs Normal file
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use iced::widget::text::Shaping;
use iced::widget::{Column, Space, button, column, container, row, scrollable, text};
use iced::{Background, Border, Color, Element, Length, Theme};
use bds_core::i18n::UiLocale;
use crate::app::Message;
use crate::components::inputs;
use crate::i18n::t;
const DEFAULT_THEME: &str = "default";
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum PreviewMode {
Auto,
Light,
Dark,
}
impl PreviewMode {
pub fn query_value(self) -> &'static str {
match self {
Self::Auto => "auto",
Self::Light => "light",
Self::Dark => "dark",
}
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
struct PreviewModeOption {
mode: PreviewMode,
label: String,
}
impl std::fmt::Display for PreviewModeOption {
fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
formatter.write_str(&self.label)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct StyleTheme {
pub name: &'static str,
pub accent_color: &'static str,
pub light_bg_color: &'static str,
pub dark_bg_color: &'static str,
}
const fn theme(name: &'static str, accent_color: &'static str) -> StyleTheme {
StyleTheme {
name,
accent_color,
light_bg_color: "#ffffff",
dark_bg_color: "#13171f",
}
}
pub const THEMES: [StyleTheme; 20] = [
theme("default", "#0172ad"),
theme("amber", "#ffbf00"),
theme("blue", "#2060df"),
theme("cyan", "#047878"),
theme("fuchsia", "#c1208b"),
theme("green", "#398712"),
theme("grey", "#ababab"),
theme("indigo", "#524ed2"),
theme("jade", "#007a50"),
theme("lime", "#a5d601"),
theme("orange", "#d24317"),
theme("pink", "#d92662"),
theme("pumpkin", "#ff9500"),
theme("purple", "#9236a4"),
theme("red", "#c52f21"),
theme("sand", "#ccc6b4"),
theme("slate", "#525f7a"),
theme("violet", "#7540bf"),
theme("yellow", "#f2df0d"),
theme("zinc", "#646b79"),
];
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StyleViewState {
pub selected_theme: String,
pub applied_theme: String,
pub preview_mode: PreviewMode,
}
impl StyleViewState {
pub fn new(applied_theme: Option<&str>) -> Self {
let applied_theme = normalize_theme(applied_theme);
Self {
selected_theme: applied_theme.clone(),
applied_theme,
preview_mode: PreviewMode::Auto,
}
}
pub fn select_theme(&mut self, theme: &str) {
if is_supported_theme(theme) {
self.selected_theme = theme.to_string();
}
}
pub fn set_preview_mode(&mut self, mode: PreviewMode) {
self.preview_mode = mode;
}
pub fn can_apply(&self) -> bool {
self.selected_theme != self.applied_theme
}
pub fn mark_applied(&mut self) {
self.applied_theme.clone_from(&self.selected_theme);
}
pub fn refresh_applied_theme(&mut self, applied_theme: Option<&str>) {
let preserve_pending_selection = self.can_apply();
self.applied_theme = normalize_theme(applied_theme);
if !preserve_pending_selection {
self.selected_theme.clone_from(&self.applied_theme);
}
}
pub fn preview_url(&self) -> String {
format!(
"http://{}:{}/__style-preview?theme={}&mode={}",
bds_core::engine::preview::PREVIEW_HOST,
bds_core::engine::preview::PREVIEW_PORT,
self.selected_theme,
self.preview_mode.query_value(),
)
}
}
#[derive(Debug, Clone)]
pub enum StyleMsg {
SelectTheme(String),
PreviewModeChanged(PreviewMode),
Apply,
}
pub fn is_supported_theme(theme: &str) -> bool {
THEMES.iter().any(|candidate| candidate.name == theme)
}
pub fn display_theme_name(theme: &str) -> String {
let replaced = theme.replace('-', " ");
let mut characters = replaced.chars();
match characters.next() {
Some(first) => first.to_uppercase().chain(characters).collect(),
None => String::new(),
}
}
fn normalize_theme(theme: Option<&str>) -> String {
theme
.filter(|theme| is_supported_theme(theme))
.unwrap_or(DEFAULT_THEME)
.to_string()
}
fn parse_hex_color(hex: &str) -> Color {
let bytes = hex.as_bytes();
if bytes.len() == 7 && bytes[0] == b'#' {
let component = |start| u8::from_str_radix(&hex[start..start + 2], 16).unwrap_or_default();
Color::from_rgb8(component(1), component(3), component(5))
} else {
Color::TRANSPARENT
}
}
fn theme_button_style(selected: bool, status: button::Status) -> button::Style {
let hovered = matches!(status, button::Status::Hovered);
button::Style {
background: Some(Background::Color(if selected {
Color::from_rgb8(0x1F, 0x45, 0x63)
} else if hovered {
Color::from_rgb8(0x32, 0x32, 0x35)
} else {
Color::from_rgb8(0x24, 0x24, 0x26)
})),
text_color: Color::from_rgb8(0xE4, 0xE4, 0xE4),
border: Border {
color: if selected {
Color::from_rgb8(0x00, 0x7F, 0xD4)
} else {
Color::from_rgb8(0x3C, 0x3C, 0x3C)
},
width: if selected { 2.0 } else { 1.0 },
radius: 6.0.into(),
},
..button::Style::default()
}
}
fn swatch(color: &'static str) -> Element<'static, Message> {
container(Space::new(Length::Fill, Length::Fixed(16.0)))
.width(Length::Fill)
.style(move |_: &Theme| container::Style {
background: Some(Background::Color(parse_hex_color(color))),
..container::Style::default()
})
.into()
}
fn theme_button<'a>(theme: &StyleTheme, selected_theme: &str) -> Element<'a, Message> {
let selected = theme.name == selected_theme;
let theme_name = theme.name.to_string();
button(
column![
row![
swatch(theme.accent_color),
swatch(theme.light_bg_color),
swatch(theme.dark_bg_color),
]
.spacing(2),
text(display_theme_name(theme.name))
.size(12)
.shaping(Shaping::Advanced),
]
.spacing(7)
.width(Length::Fill),
)
.on_press(Message::Style(StyleMsg::SelectTheme(theme_name)))
.padding(8)
.width(Length::FillPortion(1))
.style(move |_: &Theme, status| theme_button_style(selected, status))
.into()
}
pub fn view<'a>(
state: &'a StyleViewState,
locale: UiLocale,
preview_widget: Option<Element<'a, Message>>,
) -> Element<'a, Message> {
let header = inputs::card(
column![
text(t(locale, "style.title"))
.size(18)
.shaping(Shaping::Advanced),
text(t(locale, "style.subtitle"))
.size(12)
.color(inputs::LABEL_COLOR)
.shaping(Shaping::Advanced),
]
.spacing(4),
);
let theme_rows = THEMES
.chunks(4)
.map(|themes| {
let mut children = themes
.iter()
.map(|theme| theme_button(theme, &state.selected_theme))
.collect::<Vec<_>>();
while children.len() < 4 {
children.push(Space::with_width(Length::FillPortion(1)).into());
}
iced::widget::Row::with_children(children)
.spacing(8)
.width(Length::Fill)
.into()
})
.collect::<Vec<Element<'a, Message>>>();
let picker = inputs::card(
column![
text(t(locale, "style.themes"))
.size(12)
.color(inputs::SECTION_COLOR)
.shaping(Shaping::Advanced),
scrollable(Column::with_children(theme_rows).spacing(8))
.direction(scrollable::Direction::Vertical(inputs::compact_scrollbar()))
.style(inputs::scrollable_style)
.height(Length::Fixed(250.0)),
]
.spacing(8),
);
let preview_modes = [
PreviewModeOption {
mode: PreviewMode::Auto,
label: t(locale, "style.previewMode.auto"),
},
PreviewModeOption {
mode: PreviewMode::Light,
label: t(locale, "style.previewMode.light"),
},
PreviewModeOption {
mode: PreviewMode::Dark,
label: t(locale, "style.previewMode.dark"),
},
];
let selected_mode = preview_modes
.iter()
.find(|option| option.mode == state.preview_mode);
let mode_select = container(inputs::labeled_select(
&t(locale, "style.previewMode"),
&preview_modes,
selected_mode,
|option| Message::Style(StyleMsg::PreviewModeChanged(option.mode)),
))
.width(Length::Fixed(220.0));
let apply_label = text(t(locale, "style.apply"))
.size(13)
.shaping(Shaping::Advanced);
let apply_button: Element<'a, Message> = if state.can_apply() {
button(apply_label)
.on_press(Message::Style(StyleMsg::Apply))
.padding([8, 16])
.style(inputs::primary_button)
.into()
} else {
button(apply_label)
.padding([8, 16])
.style(inputs::primary_button)
.into()
};
let controls = inputs::toolbar(vec![mode_select.into()], vec![apply_button]);
let preview = preview_widget.unwrap_or_else(|| {
container(
text(t(locale, "tabBar.loading"))
.size(14)
.shaping(Shaping::Advanced),
)
.center_x(Length::Fill)
.center_y(Length::Fill)
.into()
});
let preview_card = inputs::card(
column![
text(t(locale, "style.preview"))
.size(12)
.color(inputs::SECTION_COLOR)
.shaping(Shaping::Advanced),
preview,
]
.spacing(8)
.height(Length::Fill),
)
.height(Length::Fill);
container(
column![header, picker, controls, preview_card]
.spacing(10)
.height(Length::Fill),
)
.padding(16)
.width(Length::Fill)
.height(Length::Fill)
.into()
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn themes_match_the_allium_and_bds2_catalog() {
assert_eq!(THEMES.len(), 20);
assert_eq!(THEMES.first().unwrap().name, "default");
assert_eq!(THEMES.last().unwrap().name, "zinc");
assert_eq!(
THEMES.iter().map(|theme| theme.name).collect::<Vec<_>>(),
bds_core::model::SUPPORTED_PICO_THEMES.to_vec()
);
assert_eq!(THEMES[1].accent_color, "#ffbf00");
assert_eq!(THEMES[2].accent_color, "#2060df");
assert_eq!(THEMES[18].accent_color, "#f2df0d");
assert_eq!(THEMES[19].accent_color, "#646b79");
assert_eq!(
THEMES
.iter()
.map(|theme| theme.accent_color)
.collect::<std::collections::HashSet<_>>()
.len(),
THEMES.len()
);
assert!(THEMES.iter().all(|theme| {
theme.light_bg_color == "#ffffff" && theme.dark_bg_color == "#13171f"
}));
}
#[test]
fn preview_url_tracks_selection_and_local_mode() {
let mut state = StyleViewState::new(Some("blue"));
state.select_theme("pumpkin");
state.set_preview_mode(PreviewMode::Light);
assert_eq!(
state.preview_url(),
"http://127.0.0.1:4123/__style-preview?theme=pumpkin&mode=light"
);
assert_eq!(state.applied_theme, "blue");
}
#[test]
fn invalid_or_empty_applied_theme_uses_default() {
assert_eq!(StyleViewState::new(None).applied_theme, "default");
assert_eq!(StyleViewState::new(Some("")).applied_theme, "default");
assert_eq!(
StyleViewState::new(Some("unknown")).applied_theme,
"default"
);
}
}