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use crate::keymap;
use crate::keymap::{merge_keys, KeyTrie};
use helix_loader::merge_toml_values;
use helix_view::document::Mode;
use serde::Deserialize;
use std::collections::HashMap;
use std::fmt::Display;
use std::fs;
use std::io::Error as IOError;
use toml::de::Error as TomlError;
#[derive(Debug, Clone, PartialEq)]
pub struct Config {
pub theme: Option<String>,
pub keys: HashMap<Mode, KeyTrie>,
pub editor: helix_view::editor::Config,
}
#[derive(Debug, Clone, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct ConfigRaw {
pub theme: Option<String>,
#[serde(default)]
pub unbind_default_keys: bool,
pub keys: Option<HashMap<Mode, KeyTrie>>,
pub editor: Option<toml::Value>,
}
impl Default for Config {
fn default() -> Config {
Config {
theme: None,
keys: keymap::default(),
editor: helix_view::editor::Config::default(),
}
}
}
#[derive(Debug)]
pub enum ConfigLoadError {
BadConfig(TomlError),
Error(IOError),
}
impl Default for ConfigLoadError {
fn default() -> Self {
ConfigLoadError::Error(IOError::new(std::io::ErrorKind::NotFound, "place holder"))
}
}
impl Display for ConfigLoadError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
ConfigLoadError::BadConfig(err) => err.fmt(f),
ConfigLoadError::Error(err) => err.fmt(f),
}
}
}
impl Config {
pub fn load(
global: Result<String, ConfigLoadError>,
local: Result<String, ConfigLoadError>,
) -> Result<Config, ConfigLoadError> {
let global_config: Result<ConfigRaw, ConfigLoadError> =
global.and_then(|file| toml::from_str(&file).map_err(ConfigLoadError::BadConfig));
let local_config: Result<ConfigRaw, ConfigLoadError> =
local.and_then(|file| toml::from_str(&file).map_err(ConfigLoadError::BadConfig));
let res = match (global_config, local_config) {
(Ok(global), Ok(local)) => {
let mut keys = match local.unbind_default_keys {
true => HashMap::default(),
false => keymap::default(),
};
if let Some(global_keys) = global.keys {
merge_keys(&mut keys, global_keys)
}
if let Some(local_keys) = local.keys {
merge_keys(&mut keys, local_keys)
}
let editor = match (global.editor, local.editor) {
(None, None) => helix_view::editor::Config::default(),
(None, Some(val)) | (Some(val), None) => {
val.try_into().map_err(ConfigLoadError::BadConfig)?
}
(Some(global), Some(local)) => merge_toml_values(global, local, 3)
.try_into()
.map_err(ConfigLoadError::BadConfig)?,
};
Config {
theme: local.theme.or(global.theme),
keys,
editor,
}
}
// if any configs are invalid return that first
(_, Err(ConfigLoadError::BadConfig(err)))
| (Err(ConfigLoadError::BadConfig(err)), _) => {
return Err(ConfigLoadError::BadConfig(err))
}
(Ok(config), Err(_)) | (Err(_), Ok(config)) => {
let mut keys = match config.unbind_default_keys {
true => HashMap::default(),
false => keymap::default(),
};
if let Some(keymap) = config.keys {
merge_keys(&mut keys, keymap);
}
Config {
theme: config.theme,
keys,
editor: config.editor.map_or_else(
|| Ok(helix_view::editor::Config::default()),
|val| val.try_into().map_err(ConfigLoadError::BadConfig),
)?,
}
}
// these are just two io errors return the one for the global config
(Err(err), Err(_)) => return Err(err),
};
Ok(res)
}
pub fn load_default() -> Result<Config, ConfigLoadError> {
let global_config =
fs::read_to_string(helix_loader::config_file()).map_err(ConfigLoadError::Error);
let local_config = fs::read_to_string(helix_loader::workspace_config_file())
.map_err(ConfigLoadError::Error);
Config::load(global_config, local_config)
}
}
#[cfg(test)]
mod tests {
use super::*;
impl Config {
fn load_test(config: &str) -> Config {
Config::load(Ok(config.to_owned()), Err(ConfigLoadError::default())).unwrap()
}
}
#[test]
fn parsing_keymaps_config_file() {
use crate::keymap;
use helix_core::hashmap;
use helix_view::document::Mode;
let sample_keymaps = r#"
[keys.insert]
y = "move_line_down"
S-C-a = "delete_selection"
[keys.normal]
A-F12 = "move_next_word_end"
"#;
let mut keys = keymap::default();
merge_keys(
&mut keys,
hashmap! {
Mode::Insert => keymap!({ "Insert mode"
"y" => move_line_down,
"S-C-a" => delete_selection,
}),
Mode::Normal => keymap!({ "Normal mode"
"A-F12" => move_next_word_end,
}),
},
);
assert_eq!(
Config::load_test(sample_keymaps),
Config {
keys,
..Default::default()
}
);
}
#[test]
fn keys_resolve_to_correct_defaults() {
// From serde default
let default_keys = Config::load_test("").keys;
assert_eq!(default_keys, keymap::default());
// From the Default trait
let default_keys = Config::default().keys;
assert_eq!(default_keys, keymap::default());
}
}
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