use gpui::{AnyView, DismissEvent, Entity, FocusHandle, Focusable as _, ManagedView, Subscription};use ui::prelude::*; pub enum DismissDecision { Dismiss(bool), Pending,} pub trait ModalView: ManagedView { fn on_before_dismiss( &mut self, _window: &mut Window, _: &mut Context<Self>, ) -> DismissDecision { DismissDecision::Dismiss(true) } fn fade_out_background(&self) -> bool { false }} trait ModalViewHandle { fn on_before_dismiss(&mut self, window: &mut Window, cx: &mut App) -> DismissDecision; fn view(&self) -> AnyView; fn fade_out_background(&self, cx: &mut App) -> bool;} impl<V: ModalView> ModalViewHandle for Entity<V> { fn on_before_dismiss(&mut self, window: &mut Window, cx: &mut App) -> DismissDecision { self.update(cx, |this, cx| this.on_before_dismiss(window, cx)) } fn view(&self) -> AnyView { self.clone().into() } fn fade_out_background(&self, cx: &mut App) -> bool { self.read(cx).fade_out_background() }} pub struct ActiveModal { modal: Box<dyn ModalViewHandle>, _subscriptions: [Subscription; 2], previous_focus_handle: Option<FocusHandle>, focus_handle: FocusHandle,} pub struct ModalLayer { active_modal: Option<ActiveModal>, dismiss_on_focus_lost: bool,} impl Default for ModalLayer { fn default() -> Self { Self::new() }} impl ModalLayer { pub fn new() -> Self { Self { active_modal: None, dismiss_on_focus_lost: false, } } pub fn toggle_modal<V, B>(&mut self, window: &mut Window, cx: &mut Context<Self>, build_view: B) where V: ModalView, B: FnOnce(&mut Window, &mut Context<V>) -> V, { if let Some(active_modal) = &self.active_modal { let is_close = active_modal.modal.view().downcast::<V>().is_ok(); let did_close = self.hide_modal(window, cx); if is_close || !did_close { return; } } let new_modal = cx.new(|cx| build_view(window, cx)); self.show_modal(new_modal, window, cx); } fn show_modal<V>(&mut self, new_modal: Entity<V>, window: &mut Window, cx: &mut Context<Self>) where V: ModalView, { let focus_handle = cx.focus_handle(); self.active_modal = Some(ActiveModal { modal: Box::new(new_modal.clone()), _subscriptions: [ cx.subscribe_in( &new_modal, window, |this, _, _: &DismissEvent, window, cx| { this.hide_modal(window, cx); }, ), cx.on_focus_out(&focus_handle, window, |this, _event, window, cx| { if this.dismiss_on_focus_lost { this.hide_modal(window, cx); } }), ], previous_focus_handle: window.focused(cx), focus_handle, }); cx.defer_in(window, move |_, window, cx| { window.focus(&new_modal.focus_handle(cx)); }); cx.notify(); } fn hide_modal(&mut self, window: &mut Window, cx: &mut Context<Self>) -> bool { let Some(active_modal) = self.active_modal.as_mut() else { self.dismiss_on_focus_lost = false; return false; }; match active_modal.modal.on_before_dismiss(window, cx) { DismissDecision::Dismiss(dismiss) => { self.dismiss_on_focus_lost = !dismiss; if !dismiss { return false; } } DismissDecision::Pending => { self.dismiss_on_focus_lost = false; return false; } } if let Some(active_modal) = self.active_modal.take() { if let Some(previous_focus) = active_modal.previous_focus_handle { if active_modal.focus_handle.contains_focused(window, cx) { previous_focus.focus(window); } } cx.notify(); } true } pub fn active_modal<V>(&self) -> Option<Entity<V>> where V: 'static, { let active_modal = self.active_modal.as_ref()?; active_modal.modal.view().downcast::<V>().ok() } pub fn has_active_modal(&self) -> bool { self.active_modal.is_some() }} impl Render for ModalLayer { fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement { let Some(active_modal) = &self.active_modal else { return div(); }; div() .absolute() .size_full() .top_0() .left_0() .when(active_modal.modal.fade_out_background(cx), |el| { let mut background = cx.theme().colors().elevated_surface_background; background.fade_out(0.2); el.bg(background) .occlude() .on_mouse_down_out(cx.listener(|this, _, window, cx| { this.hide_modal(window, cx); })) }) .child( v_flex() .h(px(0.0)) .top_20() .flex() .flex_col() .items_center() .track_focus(&active_modal.focus_handle) .child(h_flex().occlude().child(active_modal.modal.view())), ) }}
use gpui::{AnyView, DismissEvent, Entity, FocusHandle, Focusable as _, ManagedView, Subscription};
use ui::prelude::*;
pub enum DismissDecision {
Dismiss(bool),
Pending,
}
pub trait ModalView: ManagedView {
fn on_before_dismiss(
&mut self,
_window: &mut Window,
_: &mut Context<Self>,
) -> DismissDecision {
DismissDecision::Dismiss(true)
}
fn fade_out_background(&self) -> bool {
false
}
}
trait ModalViewHandle {
fn on_before_dismiss(&mut self, window: &mut Window, cx: &mut App) -> DismissDecision;
fn view(&self) -> AnyView;
fn fade_out_background(&self, cx: &mut App) -> bool;
}
impl<V: ModalView> ModalViewHandle for Entity<V> {
fn on_before_dismiss(&mut self, window: &mut Window, cx: &mut App) -> DismissDecision {
self.update(cx, |this, cx| this.on_before_dismiss(window, cx))
}
fn view(&self) -> AnyView {
self.clone().into()
}
fn fade_out_background(&self, cx: &mut App) -> bool {
self.read(cx).fade_out_background()
}
}
pub struct ActiveModal {
modal: Box<dyn ModalViewHandle>,
_subscriptions: [Subscription; 2],
previous_focus_handle: Option<FocusHandle>,
focus_handle: FocusHandle,
}
pub struct ModalLayer {
active_modal: Option<ActiveModal>,
dismiss_on_focus_lost: bool,
}
impl Default for ModalLayer {
fn default() -> Self {
Self::new()
}
}
impl ModalLayer {
pub fn new() -> Self {
Self {
active_modal: None,
dismiss_on_focus_lost: false,
}
}
pub fn toggle_modal<V, B>(&mut self, window: &mut Window, cx: &mut Context<Self>, build_view: B)
where
V: ModalView,
B: FnOnce(&mut Window, &mut Context<V>) -> V,
{
if let Some(active_modal) = &self.active_modal {
let is_close = active_modal.modal.view().downcast::<V>().is_ok();
let did_close = self.hide_modal(window, cx);
if is_close || !did_close {
return;
}
}
let new_modal = cx.new(|cx| build_view(window, cx));
self.show_modal(new_modal, window, cx);
}
fn show_modal<V>(&mut self, new_modal: Entity<V>, window: &mut Window, cx: &mut Context<Self>)
where
V: ModalView,
{
let focus_handle = cx.focus_handle();
self.active_modal = Some(ActiveModal {
modal: Box::new(new_modal.clone()),
_subscriptions: [
cx.subscribe_in(
&new_modal,
window,
|this, _, _: &DismissEvent, window, cx| {
this.hide_modal(window, cx);
},
),
cx.on_focus_out(&focus_handle, window, |this, _event, window, cx| {
if this.dismiss_on_focus_lost {
this.hide_modal(window, cx);
}
}),
],
previous_focus_handle: window.focused(cx),
focus_handle,
});
cx.defer_in(window, move |_, window, cx| {
window.focus(&new_modal.focus_handle(cx));
});
cx.notify();
}
fn hide_modal(&mut self, window: &mut Window, cx: &mut Context<Self>) -> bool {
let Some(active_modal) = self.active_modal.as_mut() else {
self.dismiss_on_focus_lost = false;
return false;
};
match active_modal.modal.on_before_dismiss(window, cx) {
DismissDecision::Dismiss(dismiss) => {
self.dismiss_on_focus_lost = !dismiss;
if !dismiss {
return false;
}
}
DismissDecision::Pending => {
self.dismiss_on_focus_lost = false;
return false;
}
}
if let Some(active_modal) = self.active_modal.take() {
if let Some(previous_focus) = active_modal.previous_focus_handle {
if active_modal.focus_handle.contains_focused(window, cx) {
previous_focus.focus(window);
}
}
cx.notify();
}
true
}
pub fn active_modal<V>(&self) -> Option<Entity<V>>
where
V: 'static,
{
let active_modal = self.active_modal.as_ref()?;
active_modal.modal.view().downcast::<V>().ok()
}
pub fn has_active_modal(&self) -> bool {
self.active_modal.is_some()
}
}
impl Render for ModalLayer {
fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
let Some(active_modal) = &self.active_modal else {
return div();
};
div()
.absolute()
.size_full()
.top_0()
.left_0()
.when(active_modal.modal.fade_out_background(cx), |el| {
let mut background = cx.theme().colors().elevated_surface_background;
background.fade_out(0.2);
el.bg(background)
.occlude()
.on_mouse_down_out(cx.listener(|this, _, window, cx| {
this.hide_modal(window, cx);
}))
})
.child(
v_flex()
.h(px(0.0))
.top_20()
.flex()
.flex_col()
.items_center()
.track_focus(&active_modal.focus_handle)
.child(h_flex().occlude().child(active_modal.modal.view())),
)
}
}