Configurable keys 2 (Mapping keys to commands) (#268)

* Add convenience/clarity wrapper for Range initialization

* Add keycode parse and display methods

* Add remapping functions and tests

* Implement key remapping

* Add remapping book entry

* Use raw string literal for toml

* Add command constants

* Make command functions private

* Map directly to commands

* Match key parsing/displaying to Kakoune

* Formatting pass

* Update documentation

* Formatting

* Fix example in the book

* Refactor into single config file

* Formatting

* Refactor configuration and add keymap newtype wrappers

* Address first batch of PR comments

* Replace FromStr with custom deserialize

1 files changed, 33 insertions, 0 deletions

diff --git a/helix-term/src/config.rs b/helix-term/src/config.rs
new file mode 100644
index 00000000..bd84e0b1
--- /dev/null
+++ b/helix-term/src/config.rs
@@ -0,0 +1,33 @@
+use anyhow::{Error, Result};
+use std::{collections::HashMap, str::FromStr};
+
+use serde::{de::Error as SerdeError, Deserialize, Serialize};
+
+use crate::keymap::{parse_keymaps, Keymaps};
+
+#[derive(Default)]
+pub struct Config {
+    pub keymaps: Keymaps,
+}
+
+#[derive(Serialize, Deserialize)]
+struct TomlConfig {
+    keys: Option<HashMap<String, HashMap<String, String>>>,
+}
+
+impl<'de> Deserialize<'de> for Config {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let config = TomlConfig::deserialize(deserializer)?;
+        Ok(Self {
+            keymaps: config
+                .keys
+                .map(|r| parse_keymaps(&r))
+                .transpose()
+                .map_err(|e| D::Error::custom(format!("Error deserializing keymap: {}", e)))?
+                .unwrap_or_else(Keymaps::default),
+        })
+    }
+}