use gpui::{AppContext, Model, ModelContext};use language::Buffer;use std::ops::Range; // TODO: Find a better home for `Direction`.//// This should live in an ancestor crate of `editor` and `inline_completion`,// but at time of writing there isn't an obvious spot.#[derive(Copy, Clone, PartialEq, Eq)]pub enum Direction {    Prev,    Next,} #[derive(Clone)]pub struct InlineCompletion {    pub edits: Vec<(Range<language::Anchor>, String)>,    pub edit_preview: Option<language::EditPreview>,} pub trait InlineCompletionProvider: 'static + Sized {    fn name() -> &'static str;    fn display_name() -> &'static str;    fn show_completions_in_menu() -> bool;    fn show_completions_in_normal_mode() -> bool;    fn show_tab_accept_marker() -> bool {        false    }    fn is_enabled(        &self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &AppContext,    ) -> bool;    fn is_refreshing(&self) -> bool;    fn refresh(        &mut self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        debounce: bool,        cx: &mut ModelContext<Self>,    );    fn needs_terms_acceptance(&self, _cx: &AppContext) -> bool {        false    }    fn cycle(        &mut self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        direction: Direction,        cx: &mut ModelContext<Self>,    );    fn accept(&mut self, cx: &mut ModelContext<Self>);    fn discard(&mut self, cx: &mut ModelContext<Self>);    fn suggest(        &mut self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &mut ModelContext<Self>,    ) -> Option<InlineCompletion>;} pub trait InlineCompletionProviderHandle {    fn name(&self) -> &'static str;    fn display_name(&self) -> &'static str;    fn is_enabled(        &self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &AppContext,    ) -> bool;    fn show_completions_in_menu(&self) -> bool;    fn show_completions_in_normal_mode(&self) -> bool;    fn show_tab_accept_marker(&self) -> bool;    fn needs_terms_acceptance(&self, cx: &AppContext) -> bool;    fn is_refreshing(&self, cx: &AppContext) -> bool;    fn refresh(        &self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        debounce: bool,        cx: &mut AppContext,    );    fn cycle(        &self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        direction: Direction,        cx: &mut AppContext,    );    fn accept(&self, cx: &mut AppContext);    fn discard(&self, cx: &mut AppContext);    fn suggest(        &self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &mut AppContext,    ) -> Option<InlineCompletion>;} impl<T> InlineCompletionProviderHandle for Model<T>where    T: InlineCompletionProvider,{    fn name(&self) -> &'static str {        T::name()    }     fn display_name(&self) -> &'static str {        T::display_name()    }     fn show_completions_in_menu(&self) -> bool {        T::show_completions_in_menu()    }     fn show_completions_in_normal_mode(&self) -> bool {        T::show_completions_in_normal_mode()    }     fn show_tab_accept_marker(&self) -> bool {        T::show_tab_accept_marker()    }     fn is_enabled(        &self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &AppContext,    ) -> bool {        self.read(cx).is_enabled(buffer, cursor_position, cx)    }     fn needs_terms_acceptance(&self, cx: &AppContext) -> bool {        self.read(cx).needs_terms_acceptance(cx)    }     fn is_refreshing(&self, cx: &AppContext) -> bool {        self.read(cx).is_refreshing()    }     fn refresh(        &self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        debounce: bool,        cx: &mut AppContext,    ) {        self.update(cx, |this, cx| {            this.refresh(buffer, cursor_position, debounce, cx)        })    }     fn cycle(        &self,        buffer: Model<Buffer>,        cursor_position: language::Anchor,        direction: Direction,        cx: &mut AppContext,    ) {        self.update(cx, |this, cx| {            this.cycle(buffer, cursor_position, direction, cx)        })    }     fn accept(&self, cx: &mut AppContext) {        self.update(cx, |this, cx| this.accept(cx))    }     fn discard(&self, cx: &mut AppContext) {        self.update(cx, |this, cx| this.discard(cx))    }     fn suggest(        &self,        buffer: &Model<Buffer>,        cursor_position: language::Anchor,        cx: &mut AppContext,    ) -> Option<InlineCompletion> {        self.update(cx, |this, cx| this.suggest(buffer, cursor_position, cx))    }}