use std::{ops::Range, sync::Arc}; use gpui::{Action, KeyContext};use language::CursorShape;use serde::{Deserialize, Serialize};use workspace::searchable::Direction; use crate::motion::Motion; #[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize, Serialize)]pub enum Mode {    Normal,    Insert,    Visual,    VisualLine,    VisualBlock,} impl Mode {    pub fn is_visual(&self) -> bool {        match self {            Mode::Normal | Mode::Insert => false,            Mode::Visual | Mode::VisualLine | Mode::VisualBlock => true,        }    }} impl Default for Mode {    fn default() -> Self {        Self::Normal    }} #[derive(Copy, Clone, Debug, PartialEq, Eq, Deserialize)]pub enum Operator {    Change,    Delete,    Yank,    Replace,    Object { around: bool },    FindForward { before: bool },    FindBackward { after: bool },} #[derive(Default, Clone)]pub struct EditorState {    pub mode: Mode,    pub last_mode: Mode,     /// pre_count is the number before an operator is specified (3 in 3d2d)    pub pre_count: Option<usize>,    /// post_count is the number after an operator is specified (2 in 3d2d)    pub post_count: Option<usize>,     pub operator_stack: Vec<Operator>,} #[derive(Default, Clone, Debug)]pub enum RecordedSelection {    #[default]    None,    Visual {        rows: u32,        cols: u32,    },    SingleLine {        cols: u32,    },    VisualBlock {        rows: u32,        cols: u32,    },    VisualLine {        rows: u32,    },} #[derive(Default, Clone)]pub struct WorkspaceState {    pub search: SearchState,    pub last_find: Option<Motion>,     pub recording: bool,    pub stop_recording_after_next_action: bool,    pub replaying: bool,    pub recorded_count: Option<usize>,    pub recorded_actions: Vec<ReplayableAction>,    pub recorded_selection: RecordedSelection,} #[derive(Debug)]pub enum ReplayableAction {    Action(Box<dyn Action>),    Insertion {        text: Arc<str>,        utf16_range_to_replace: Option<Range<isize>>,    },} impl Clone for ReplayableAction {    fn clone(&self) -> Self {        match self {            Self::Action(action) => Self::Action(action.boxed_clone()),            Self::Insertion {                text,                utf16_range_to_replace,            } => Self::Insertion {                text: text.clone(),                utf16_range_to_replace: utf16_range_to_replace.clone(),            },        }    }} #[derive(Clone)]pub struct SearchState {    pub direction: Direction,    pub count: usize,    pub initial_query: String,} impl Default for SearchState {    fn default() -> Self {        Self {            direction: Direction::Next,            count: 1,            initial_query: "".to_string(),        }    }} impl EditorState {    pub fn cursor_shape(&self) -> CursorShape {        match self.mode {            Mode::Normal => {                if self.operator_stack.is_empty() {                    CursorShape::Block                } else {                    CursorShape::Underscore                }            }            Mode::Visual | Mode::VisualLine | Mode::VisualBlock => CursorShape::Block,            Mode::Insert => CursorShape::Bar,        }    }     pub fn vim_controlled(&self) -> bool {        !matches!(self.mode, Mode::Insert)            || matches!(                self.operator_stack.last(),                Some(Operator::FindForward { .. }) | Some(Operator::FindBackward { .. })            )    }     pub fn should_autoindent(&self) -> bool {        !(self.mode == Mode::Insert && self.last_mode == Mode::VisualBlock)    }     pub fn clip_at_line_ends(&self) -> bool {        match self.mode {            Mode::Insert | Mode::Visual | Mode::VisualLine | Mode::VisualBlock => false,            Mode::Normal => true,        }    }     pub fn active_operator(&self) -> Option<Operator> {        self.operator_stack.last().copied()    }     pub fn keymap_context_layer(&self) -> KeyContext {        let mut context = KeyContext::default();        context.add("VimEnabled");        context.set(            "vim_mode",            match self.mode {                Mode::Normal => "normal",                Mode::Visual | Mode::VisualLine | Mode::VisualBlock => "visual",                Mode::Insert => "insert",            },        );         if self.vim_controlled() {            context.add("VimControl");        }         if self.active_operator().is_none() && self.pre_count.is_some()            || self.active_operator().is_some() && self.post_count.is_some()        {            context.add("VimCount");        }         let active_operator = self.active_operator();         if let Some(active_operator) = active_operator {            for context_flag in active_operator.context_flags().into_iter() {                context.add(*context_flag);            }        }         context.set(            "vim_operator",            active_operator.map(|op| op.id()).unwrap_or_else(|| "none"),        );         context    }} impl Operator {    pub fn id(&self) -> &'static str {        match self {            Operator::Object { around: false } => "i",            Operator::Object { around: true } => "a",            Operator::Change => "c",            Operator::Delete => "d",            Operator::Yank => "y",            Operator::Replace => "r",            Operator::FindForward { before: false } => "f",            Operator::FindForward { before: true } => "t",            Operator::FindBackward { after: false } => "F",            Operator::FindBackward { after: true } => "T",        }    }     pub fn context_flags(&self) -> &'static [&'static str] {        match self {            Operator::Object { .. } => &["VimObject"],            Operator::FindForward { .. } | Operator::FindBackward { .. } | Operator::Replace => {                &["VimWaiting"]            }            _ => &[],        }    }}