Render indent-style status in status line.

Also cleaned up the status line code a little.

helix-term/src/ui/editor.rs

@@ -11,7 +11,10 @@ use helix_core::{
     syntax::{self, HighlightEvent},
     Position, Range,
 };
-use helix_view::{document::Mode, Document, Editor, Theme, View};
+use helix_view::{
+    document::{IndentStyle, Mode},
+    Document, Editor, Theme, View,
+};
 use std::borrow::Cow;
 
 use crossterm::{
@@ -455,6 +458,10 @@ impl EditorView {
         theme: &Theme,
         is_focused: bool,
     ) {
+        //-------------------------------
+        // Left side of the status line.
+        //-------------------------------
+
         let mode = match doc.mode() {
             Mode::Insert => "INS",
             Mode::Select => "SEL",
@@ -487,24 +494,41 @@ impl EditorView {
             );
         }
 
-        surface.set_stringn(
-            viewport.x + viewport.width.saturating_sub(15),
-            viewport.y,
-            format!("{}", doc.diagnostics().len()),
-            4,
-            text_color,
-        );
-
-        // render line:col
+        //-------------------------------
+        // Right side of the status line.
+        //-------------------------------
+
+        // Compute the individual info strings.
+        let diag_count = format!("{}", doc.diagnostics().len());
+        let indent_info = match doc.indent_style {
+            IndentStyle::Tabs => "tab",
+            IndentStyle::Spaces(1) => "spaces:1",
+            IndentStyle::Spaces(2) => "spaces:2",
+            IndentStyle::Spaces(3) => "spaces:3",
+            IndentStyle::Spaces(4) => "spaces:4",
+            IndentStyle::Spaces(5) => "spaces:5",
+            IndentStyle::Spaces(6) => "spaces:6",
+            IndentStyle::Spaces(7) => "spaces:7",
+            IndentStyle::Spaces(8) => "spaces:8",
+            _ => "indent:ERROR",
+        };
+        let position_info = {
             let pos = coords_at_pos(doc.text().slice(..), doc.selection(view.id).cursor());
+            format!("{}:{}", pos.row + 1, pos.col + 1) // convert to 1-indexing
+        };
 
-        let text = format!("{}:{}", pos.row + 1, pos.col + 1); // convert to 1-indexing
-        let len = text.len();
-
+        // Render them to the status line together.
+        let right_side_text = format!(
+            "{}  {}  {} ",
+            &diag_count[..diag_count.len().min(4)],
+            indent_info,
+            position_info
+        );
+        let text_len = right_side_text.len() as u16;
         surface.set_string(
-            viewport.x + viewport.width.saturating_sub(len as u16 + 1),
+            viewport.x + viewport.width.saturating_sub(text_len),
             viewport.y,
-            text,
+            right_side_text,
             text_color,
         );
     }

helix-view/src/document.rs

@@ -32,7 +32,6 @@ pub struct Document {
     pub(crate) id: DocumentId,
     text: Rope,
     pub(crate) selections: HashMap<ViewId, Selection>,
-    pub(crate) indent_style: IndentStyle,
 
     path: Option<PathBuf>,
 
@@ -40,6 +39,9 @@ pub struct Document {
     pub mode: Mode,
     pub restore_cursor: bool,
 
+    /// Current indent style.
+    pub indent_style: IndentStyle,
+
     syntax: Option<Syntax>,
     // /// Corresponding language scope name. Usually `source.<lang>`.
     pub(crate) language: Option<Arc<LanguageConfiguration>>,