From 4a9d1163e04ba0fc29f8532afd35381b7df55e48 Mon Sep 17 00:00:00 2001
From: Blaž Hrastnik
Date: Fri, 14 May 2021 19:21:46 +0900
Subject: Hacky way to specify indent scopes per language via toml configs.

Can't do it via a scm query nicely because it returns an iterator over
all the matches, whereas we want to traverse the tree ourselves.

Can't extract the pattern data from a parsed query either.

Oh well, toml files for now.
---
 helix-core/src/syntax.rs | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'helix-core/src/syntax.rs')

diff --git a/helix-core/src/syntax.rs b/helix-core/src/syntax.rs
index 06f3399e..1b8e832b 100644
--- a/helix-core/src/syntax.rs
+++ b/helix-core/src/syntax.rs
@@ -4,7 +4,7 @@ pub use helix_syntax::{get_language, get_language_name, Lang};
 use std::{
     borrow::Cow,
     cell::RefCell,
-    collections::HashMap,
+    collections::{HashMap, HashSet},
     path::{Path, PathBuf},
     sync::Arc,
 };
@@ -41,6 +41,9 @@ pub struct LanguageConfiguration {
     pub language_server: Option<LanguageServerConfiguration>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub indent: Option<IndentationConfiguration>,
+
+    #[serde(skip)]
+    pub(crate) indent_query: OnceCell<Option<IndentQuery>>,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -59,6 +62,17 @@ pub struct IndentationConfiguration {
     pub unit: String,
 }
 
+#[derive(Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub struct IndentQuery {
+    #[serde(default)]
+    #[serde(skip_serializing_if = "HashSet::is_empty")]
+    pub indent: HashSet<String>,
+    #[serde(default)]
+    #[serde(skip_serializing_if = "HashSet::is_empty")]
+    pub outdent: HashSet<String>,
+}
+
 fn read_query(language: &str, filename: &str) -> String {
     static INHERITS_REGEX: Lazy<Regex> =
         Lazy::new(|| Regex::new(r";+\s*inherits\s*:?\s*([a-z_,()]+)\s*").unwrap());
@@ -127,6 +141,20 @@ impl LanguageConfiguration {
             .clone()
     }
 
+    pub fn indent_query(&self) -> Option<&IndentQuery> {
+        self.indent_query
+            .get_or_init(|| {
+                let language = get_language_name(self.language_id).to_ascii_lowercase();
+
+                let root = crate::runtime_dir();
+                let path = root.join("queries").join(language).join("indents.toml");
+
+                let toml = std::fs::read(&path).ok()?;
+                toml::from_slice(&toml).ok()
+            })
+            .as_ref()
+    }
+
     pub fn scope(&self) -> &str {
         &self.scope
     }
-- 
cgit v1.2.3-70-g09d2