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use nvim_types::Object;
use serde::Deserialize;

use crate::object::{self, de::utils, FromObject};

/// Arguments passed to functions executed by commands. See
/// [`Buffer::create_user_command`](crate::api::Buffer::create_user_command) to
/// create a buffer-local command or
/// [`create_user_command`](crate::api::create_user_command) to create a global
/// one.
#[non_exhaustive]
#[derive(Clone, Debug, Eq, PartialEq, Hash, Deserialize)]
pub struct CommandArgs {
    /// The arguments passed to the command, if any.
    #[serde(deserialize_with = "utils::empty_string_is_none")]
    pub args: Option<String>,

    /// Whether the command was executed with a `!` modifier.
    pub bang: bool,

    /// The count supplied by `<count>`, if any.
    #[serde(deserialize_with = "utils::minus_one_is_none")]
    pub count: Option<u32>,

    /// The arguments passed to the command split by unescaped whitespace.
    pub fargs: Vec<String>,

    /// The starting line of the command range.
    pub line1: usize,

    /// The final line of the command range.
    pub line2: usize,

    /// Command modifiers, if any.
    #[serde(deserialize_with = "utils::empty_string_is_none")]
    pub mods: Option<String>,

    /// The number of items in the command range.
    pub range: u8,

    /// The optional register, if specified.
    #[serde(rename = "reg", deserialize_with = "utils::empty_string_is_none")]
    pub register: Option<String>,

    /// Command modifiers in a more structured format.
    #[cfg(feature = "nightly")]
    #[cfg_attr(docsrs, doc(cfg(feature = "nightly")))]
    pub smods: super::CommandModifiers,
}

impl FromObject for CommandArgs {
    fn from_obj(obj: Object) -> crate::Result<Self> {
        Self::deserialize(object::Deserializer::new(obj))
    }
}