mod appearance_settings_controls; use std::any::TypeId; use command_palette_hooks::CommandPaletteFilter;use editor::EditorSettingsControls;use feature_flags::{FeatureFlag, FeatureFlagViewExt};use gpui::{actions, AppContext, EventEmitter, FocusHandle, FocusableView, View};use ui::prelude::*;use workspace::item::{Item, ItemEvent};use workspace::Workspace; use crate::appearance_settings_controls::AppearanceSettingsControls; pub struct SettingsUiFeatureFlag; impl FeatureFlag for SettingsUiFeatureFlag {    const NAME: &'static str = "settings-ui";} actions!(zed, [OpenSettingsEditor]); pub fn init(cx: &mut AppContext) {    cx.observe_new_views(|workspace: &mut Workspace, cx| {        workspace.register_action(|workspace, _: &OpenSettingsEditor, cx| {            let existing = workspace                .active_pane()                .read(cx)                .items()                .find_map(|item| item.downcast::<SettingsPage>());             if let Some(existing) = existing {                workspace.activate_item(&existing, true, true, cx);            } else {                let settings_page = SettingsPage::new(workspace, cx);                workspace.add_item_to_active_pane(Box::new(settings_page), None, true, cx)            }        });         let settings_ui_actions = [TypeId::of::<OpenSettingsEditor>()];         CommandPaletteFilter::update_global(cx, |filter, _cx| {            filter.hide_action_types(&settings_ui_actions);        });         cx.observe_flag::<SettingsUiFeatureFlag, _>(move |is_enabled, _view, cx| {            if is_enabled {                CommandPaletteFilter::update_global(cx, |filter, _cx| {                    filter.show_action_types(settings_ui_actions.iter());                });            } else {                CommandPaletteFilter::update_global(cx, |filter, _cx| {                    filter.hide_action_types(&settings_ui_actions);                });            }        })        .detach();    })    .detach();} pub struct SettingsPage {    focus_handle: FocusHandle,} impl SettingsPage {    pub fn new(_workspace: &Workspace, cx: &mut ViewContext<Workspace>) -> View<Self> {        cx.new_view(|cx| Self {            focus_handle: cx.focus_handle(),        })    }} impl EventEmitter<ItemEvent> for SettingsPage {} impl FocusableView for SettingsPage {    fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {        self.focus_handle.clone()    }} impl Item for SettingsPage {    type Event = ItemEvent;     fn tab_icon(&self, _cx: &WindowContext) -> Option<Icon> {        Some(Icon::new(IconName::Settings))    }     fn tab_content_text(&self, _cx: &WindowContext) -> Option<SharedString> {        Some("Settings".into())    }     fn show_toolbar(&self) -> bool {        false    }     fn to_item_events(event: &Self::Event, mut f: impl FnMut(ItemEvent)) {        f(*event)    }} impl Render for SettingsPage {    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {        v_flex()            .p_4()            .size_full()            .gap_4()            .child(Label::new("Settings").size(LabelSize::Large))            .child(                v_flex().gap_1().child(Label::new("Appearance")).child(                    v_flex()                        .elevation_2(cx)                        .child(AppearanceSettingsControls::new()),                ),            )            .child(                v_flex().gap_1().child(Label::new("Editor")).child(                    v_flex()                        .elevation_2(cx)                        .child(EditorSettingsControls::new()),                ),            )    }}