use std::sync::Arc; use editor::{Editor, EditorElement, EditorStyle};use fs::Fs;use gpui::{AppContext, FocusableView, Model, TextStyle, View, WeakModel, WeakView};use language_model::{LanguageModelRegistry, LanguageModelRequestTool};use language_model_selector::{LanguageModelSelector, LanguageModelSelectorPopoverMenu};use settings::{update_settings_file, Settings};use theme::ThemeSettings;use ui::{    prelude::*, ButtonLike, CheckboxWithLabel, ElevationIndex, KeyBinding, PopoverMenuHandle,    Tooltip,};use workspace::Workspace; use crate::assistant_settings::AssistantSettings;use crate::context_picker::ContextPicker;use crate::context_store::ContextStore;use crate::context_strip::ContextStrip;use crate::thread::{RequestKind, Thread};use crate::thread_store::ThreadStore;use crate::{Chat, ToggleContextPicker, ToggleModelSelector}; pub struct MessageEditor {    thread: Model<Thread>,    editor: View<Editor>,    context_store: Model<ContextStore>,    context_strip: View<ContextStrip>,    context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,    language_model_selector: View<LanguageModelSelector>,    language_model_selector_menu_handle: PopoverMenuHandle<LanguageModelSelector>,    use_tools: bool,} impl MessageEditor {    pub fn new(        fs: Arc<dyn Fs>,        workspace: WeakView<Workspace>,        thread_store: WeakModel<ThreadStore>,        thread: Model<Thread>,        cx: &mut ViewContext<Self>,    ) -> Self {        let context_store = cx.new_model(|_cx| ContextStore::new());        let context_picker_menu_handle = PopoverMenuHandle::default();         let editor = cx.new_view(|cx| {            let mut editor = Editor::auto_height(80, cx);            editor.set_placeholder_text("Ask anything, @ to add context", cx);            editor.set_show_indent_guides(false, cx);             editor        });         Self {            thread,            editor: editor.clone(),            context_store: context_store.clone(),            context_strip: cx.new_view(|cx| {                ContextStrip::new(                    context_store,                    workspace.clone(),                    Some(thread_store.clone()),                    editor.focus_handle(cx),                    context_picker_menu_handle.clone(),                    cx,                )            }),            context_picker_menu_handle,            language_model_selector: cx.new_view(|cx| {                let fs = fs.clone();                LanguageModelSelector::new(                    move |model, cx| {                        update_settings_file::<AssistantSettings>(                            fs.clone(),                            cx,                            move |settings, _cx| settings.set_model(model.clone()),                        );                    },                    cx,                )            }),            language_model_selector_menu_handle: PopoverMenuHandle::default(),            use_tools: false,        }    }     fn toggle_model_selector(&mut self, _: &ToggleModelSelector, cx: &mut ViewContext<Self>) {        self.language_model_selector_menu_handle.toggle(cx);    }     fn toggle_context_picker(&mut self, _: &ToggleContextPicker, cx: &mut ViewContext<Self>) {        self.context_picker_menu_handle.toggle(cx);    }     fn chat(&mut self, _: &Chat, cx: &mut ViewContext<Self>) {        self.send_to_model(RequestKind::Chat, cx);    }     fn send_to_model(        &mut self,        request_kind: RequestKind,        cx: &mut ViewContext<Self>,    ) -> Option<()> {        let provider = LanguageModelRegistry::read_global(cx).active_provider();        if provider            .as_ref()            .map_or(false, |provider| provider.must_accept_terms(cx))        {            cx.notify();            return None;        }         let model_registry = LanguageModelRegistry::read_global(cx);        let model = model_registry.active_model()?;         let user_message = self.editor.update(cx, |editor, cx| {            let text = editor.text(cx);            editor.clear(cx);            text        });        let context = self.context_store.update(cx, |this, _cx| this.drain());         self.thread.update(cx, |thread, cx| {            thread.insert_user_message(user_message, context, cx);            let mut request = thread.to_completion_request(request_kind, cx);             if self.use_tools {                request.tools = thread                    .tools()                    .tools(cx)                    .into_iter()                    .map(|tool| LanguageModelRequestTool {                        name: tool.name(),                        description: tool.description(),                        input_schema: tool.input_schema(),                    })                    .collect();            }             thread.stream_completion(request, model, cx)        });         None    }     fn render_language_model_selector(&self, cx: &mut ViewContext<Self>) -> impl IntoElement {        let active_model = LanguageModelRegistry::read_global(cx).active_model();        let focus_handle = self.language_model_selector.focus_handle(cx).clone();         LanguageModelSelectorPopoverMenu::new(            self.language_model_selector.clone(),            ButtonLike::new("active-model")                .style(ButtonStyle::Subtle)                .child(                    h_flex()                        .w_full()                        .gap_0p5()                        .child(                            div()                                .overflow_x_hidden()                                .flex_grow()                                .whitespace_nowrap()                                .child(match active_model {                                    Some(model) => h_flex()                                        .child(                                            Label::new(model.name().0)                                                .size(LabelSize::Small)                                                .color(Color::Muted),                                        )                                        .into_any_element(),                                    _ => Label::new("No model selected")                                        .size(LabelSize::Small)                                        .color(Color::Muted)                                        .into_any_element(),                                }),                        )                        .child(                            Icon::new(IconName::ChevronDown)                                .color(Color::Muted)                                .size(IconSize::XSmall),                        ),                )                .tooltip(move |cx| {                    Tooltip::for_action_in("Change Model", &ToggleModelSelector, &focus_handle, cx)                }),        )        .with_handle(self.language_model_selector_menu_handle.clone())    }} impl FocusableView for MessageEditor {    fn focus_handle(&self, cx: &AppContext) -> gpui::FocusHandle {        self.editor.focus_handle(cx)    }} impl Render for MessageEditor {    fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {        let font_size = TextSize::Default.rems(cx);        let line_height = font_size.to_pixels(cx.rem_size()) * 1.5;        let focus_handle = self.editor.focus_handle(cx);        let bg_color = cx.theme().colors().editor_background;         v_flex()            .key_context("MessageEditor")            .on_action(cx.listener(Self::chat))            .on_action(cx.listener(Self::toggle_model_selector))            .on_action(cx.listener(Self::toggle_context_picker))            .size_full()            .gap_2()            .p_2()            .bg(bg_color)            .child(self.context_strip.clone())            .child(div().id("thread_editor").overflow_y_scroll().h_12().child({                let settings = ThemeSettings::get_global(cx);                let text_style = TextStyle {                    color: cx.theme().colors().editor_foreground,                    font_family: settings.ui_font.family.clone(),                    font_features: settings.ui_font.features.clone(),                    font_size: font_size.into(),                    font_weight: settings.ui_font.weight,                    line_height: line_height.into(),                    ..Default::default()                };                 EditorElement::new(                    &self.editor,                    EditorStyle {                        background: bg_color,                        local_player: cx.theme().players().local(),                        text: text_style,                        ..Default::default()                    },                )            }))            .child(                h_flex()                    .justify_between()                    .child(CheckboxWithLabel::new(                        "use-tools",                        Label::new("Tools"),                        self.use_tools.into(),                        cx.listener(|this, selection, _cx| {                            this.use_tools = match selection {                                ToggleState::Selected => true,                                ToggleState::Unselected | ToggleState::Indeterminate => false,                            };                        }),                    ))                    .child(                        h_flex()                            .gap_1()                            .child(self.render_language_model_selector(cx))                            .child(                                ButtonLike::new("chat")                                    .style(ButtonStyle::Filled)                                    .layer(ElevationIndex::ModalSurface)                                    .child(Label::new("Submit"))                                    .children(                                        KeyBinding::for_action_in(&Chat, &focus_handle, cx)                                            .map(|binding| binding.into_any_element()),                                    )                                    .on_click(move |_event, cx| {                                        focus_handle.dispatch_action(&Chat, cx);                                    }),                            ),                    ),            )    }}