Add tab_width and indent_unit config.

2 files changed, 22 insertions, 2 deletions

diff --git a/helix-view/src/document.rs b/helix-view/src/document.rs
index e606ec3c..f6c7c70d 100644
--- a/helix-view/src/document.rs
+++ b/helix-view/src/document.rs
@@ -296,6 +296,26 @@ impl Document {
         self.syntax.as_ref()
     }
 
+    /// Tab size in columns.
+    pub fn tab_width(&self) -> usize {
+        self.language
+            .as_ref()
+            .and_then(|config| config.indent_config.as_ref())
+            .map(|config| config.tab_width)
+            .unwrap_or(4) // fallback to 4 columns
+    }
+
+    /// Returns a string containing a single level of indentation.
+    pub fn indent_unit(&self) -> &str {
+        self.language
+            .as_ref()
+            .and_then(|config| config.indent_config.as_ref())
+            .map(|config| config.indent_unit.as_str())
+            .unwrap_or("  ") // fallback to 2 spaces
+
+        // " ".repeat(TAB_WIDTH)
+    }
+
     #[inline]
     /// File path on disk.
     pub fn path(&self) -> Option<&PathBuf> {
diff --git a/helix-view/src/view.rs b/helix-view/src/view.rs
index b406b756..31a36047 100644
--- a/helix-view/src/view.rs
+++ b/helix-view/src/view.rs
@@ -5,7 +5,6 @@ use std::borrow::Cow;
 use crate::Document;
 use helix_core::{
     graphemes::{grapheme_width, RopeGraphemes},
-    indent::TAB_WIDTH,
     Position, RopeSlice,
 };
 use slotmap::DefaultKey as Key;
@@ -72,10 +71,11 @@ impl View {
         let line_start = text.line_to_char(line);
         let line_slice = text.slice(line_start..pos);
         let mut col = 0;
+        let tab_width = self.doc.tab_width();
 
         for grapheme in RopeGraphemes::new(line_slice) {
             if grapheme == "\t" {
-                col += TAB_WIDTH;
+                col += tab_width;
             } else {
                 let grapheme = Cow::from(grapheme);
                 col += grapheme_width(&grapheme);