Refactor language config loading (#1658)

2 files changed, 34 insertions, 0 deletions

diff --git a/helix-core/src/config.rs b/helix-core/src/config.rs
new file mode 100644
index 00000000..5bd16abd
--- /dev/null
+++ b/helix-core/src/config.rs
@@ -0,0 +1,33 @@
+use crate::merge_toml_values;
+
+/// Default bultin-in languages.toml.
+pub fn default_lang_config() -> toml::Value {
+    toml::from_slice(include_bytes!("../../languages.toml"))
+        .expect("Could not parse bultin-in languages.toml to valid toml")
+}
+
+/// User configured languages.toml file, merged with the default config.
+pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
+    let def_lang_conf = default_lang_config();
+    let data = std::fs::read(crate::config_dir().join("languages.toml"));
+    let user_lang_conf = match data {
+        Ok(raw) => {
+            let value = toml::from_slice(&raw)?;
+            merge_toml_values(def_lang_conf, value)
+        }
+        Err(_) => def_lang_conf,
+    };
+
+    Ok(user_lang_conf)
+}
+
+/// Syntax configuration loader based on built-in languages.toml.
+pub fn default_syntax_loader() -> crate::syntax::Configuration {
+    default_lang_config()
+        .try_into()
+        .expect("Could not serialize built-in language.toml")
+}
+/// Syntax configuration loader based on user configured languages.toml.
+pub fn user_syntax_loader() -> Result<crate::syntax::Configuration, toml::de::Error> {
+    user_lang_config()?.try_into()
+}
diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs
index fa8566ab..8e5950de 100644
--- a/helix-core/src/lib.rs
+++ b/helix-core/src/lib.rs
@@ -3,6 +3,7 @@ pub use encoding_rs as encoding;
 pub mod auto_pairs;
 pub mod chars;
 pub mod comment;
+pub mod config;
 pub mod diagnostic;
 pub mod diff;
 pub mod graphemes;