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//! Page Header module.
//!
//! This public module implements the Liora page header component with title, back action, and footer slots. It keeps the reusable
//! component logic inside `liora-components` rather than Gallery or Docs so
//! downstream GPUI applications can compose the same behavior with their own
//! app state, assets, and release policy.
//!
//! ## Usage model
//!
//! Components in this module render native GPUI element trees. Stateless builder
//! values can be constructed inline, while controls with focus, selection,
//! popup, drag, or editing state should be stored as `gpui::Entity<T>` fields in
//! the parent view so state survives GPUI render passes.
//!
//! ## Design contract
//!
//! The implementation should use Liora theme tokens from `liora-core` and
//! `liora-theme`, keep accessibility-oriented keyboard/pointer behavior close to
//! the component, and avoid app-specific Gallery/Docs resources in this SDK
//! crate.
use gpui::{AnyElement, App, IntoElement, RenderOnce, SharedString, Window, div, prelude::*, px};
use liora_core::Config;
use liora_icons::Icon;
use liora_icons_lucide::IconName;
/// Fluent native GPUI component for rendering Liora page header.
pub struct PageHeader {
title: SharedString,
sub_title: Option<SharedString>,
back_icon: Option<IconName>,
on_back: Option<Box<dyn Fn(&mut Window, &mut App) + 'static>>,
extra: Option<Box<dyn Fn(&mut Window, &mut App) -> AnyElement + 'static>>,
content: Option<Box<dyn Fn(&mut Window, &mut App) -> AnyElement + 'static>>,
footer: Option<Box<dyn Fn(&mut Window, &mut App) -> AnyElement + 'static>>,
}
impl PageHeader {
/// Creates `PageHeader` initialized from the supplied title.
pub fn new(title: impl Into<SharedString>) -> Self {
Self {
title: title.into(),
sub_title: None,
back_icon: Some(IconName::ArrowLeft),
on_back: None,
extra: None,
content: None,
footer: None,
}
}
/// Sets the sub title displayed or consumed by the component.
pub fn sub_title(mut self, sub_title: impl Into<SharedString>) -> Self {
self.sub_title = Some(sub_title.into());
self
}
/// Sets the back icon rendered by the component.
pub fn back_icon(mut self, icon: IconName) -> Self {
self.back_icon = Some(icon);
self
}
/// Registers a callback that runs when back occurs.
pub fn on_back(mut self, f: impl Fn(&mut Window, &mut App) + 'static) -> Self {
self.on_back = Some(Box::new(f));
self
}
/// Sets the extra value used by the component.
pub fn extra<F>(mut self, f: F) -> Self
where
F: Fn(&mut Window, &mut App) -> AnyElement + 'static,
{
self.extra = Some(Box::new(f));
self
}
/// Sets the rendered content element or text for this component.
pub fn content<F>(mut self, f: F) -> Self
where
F: Fn(&mut Window, &mut App) -> AnyElement + 'static,
{
self.content = Some(Box::new(f));
self
}
/// Sets the footer value used by the component.
pub fn footer<F>(mut self, f: F) -> Self
where
F: Fn(&mut Window, &mut App) -> AnyElement + 'static,
{
self.footer = Some(Box::new(f));
self
}
}
impl RenderOnce for PageHeader {
fn render(self, window: &mut Window, cx: &mut App) -> impl IntoElement {
let theme = cx.global::<Config>().theme.clone();
div()
.flex()
.flex_col()
.w_full()
.p_4()
.gap_4()
.bg(theme.neutral.card)
.child(
div()
.flex()
.flex_row()
.items_center()
.justify_between()
.child(
div()
.flex()
.flex_row()
.items_center()
.gap_3()
// Back Button
.when_some(self.back_icon, |s, icon| {
s.child(
div()
.id("back-btn")
.cursor_pointer()
.flex()
.items_center()
.justify_center()
.w_8()
.h_8()
.rounded_full()
.hover(|s| s.bg(theme.neutral.hover))
.on_click(move |_, window, cx| {
if let Some(ref f) = self.on_back {
(f)(window, cx);
}
})
.child(
Icon::new(icon)
.size(px(20.0))
.color(theme.neutral.text_1),
),
)
})
// Title
.child(
div()
.text_lg()
.font_weight(gpui::FontWeight::BOLD)
.text_color(theme.neutral.text_1)
.child(self.title),
)
// Divider
.when(self.sub_title.is_some(), |s| {
s.child(div().w(px(1.0)).h(px(16.0)).bg(theme.neutral.border))
})
// Subtitle
.when_some(self.sub_title, |s, sub| {
s.child(div().text_sm().text_color(theme.neutral.text_3).child(sub))
}),
)
// Extra
.when_some(self.extra, |s, extra| {
s.child(
div()
.flex()
.flex_row()
.items_center()
.child((extra)(window, cx)),
)
}),
)
// Content
.when_some(self.content, |s, content| {
s.child(div().child((content)(window, cx)))
})
// Footer
.when_some(self.footer, |s, footer| {
s.child(
div()
.border_t_1()
.border_color(theme.neutral.border)
.pt_4()
.child((footer)(window, cx)),
)
})
}
}
impl IntoElement for PageHeader {
type Element = gpui::Component<Self>;
fn into_element(self) -> Self::Element {
gpui::Component::new(self)
}
}