add statusline element to display file line endings

book/src/configuration.md

@@ -62,7 +62,7 @@ Statusline elements can be defined as follows:
 [editor.statusline]
 left = ["mode", "spinner"]
 center = ["file-name"]
-right = ["diagnostics", "selections", "position", "file-encoding", "file-type"]
+right = ["diagnostics", "selections", "position", "file-encoding", "file-line-ending", "file-type"]
 ```
 
 The following elements can be configured:
@@ -73,6 +73,7 @@ The following elements can be configured:
 | `spinner` | A progress spinner indicating LSP activity |
 | `file-name` | The path/name of the opened file |
 | `file-encoding` | The encoding of the opened file if it differs from UTF-8 |
+| `file-line-ending` | The file line endings (CRLF or LF) |
 | `file-type` | The type of the opened file |
 | `diagnostics` | The number of warnings and/or errors |
 | `selections` | The number of active selections |

helix-term/src/ui/statusline.rs

@@ -138,6 +138,7 @@ where
         helix_view::editor::StatusLineElement::Spinner => render_lsp_spinner,
         helix_view::editor::StatusLineElement::FileName => render_file_name,
         helix_view::editor::StatusLineElement::FileEncoding => render_file_encoding,
+        helix_view::editor::StatusLineElement::FileLineEnding => render_file_line_ending,
         helix_view::editor::StatusLineElement::FileType => render_file_type,
         helix_view::editor::StatusLineElement::Diagnostics => render_diagnostics,
         helix_view::editor::StatusLineElement::Selections => render_selections,
@@ -280,6 +281,19 @@ where
     }
 }
 
+fn render_file_line_ending<F>(context: &mut RenderContext, write: F)
+where
+    F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
+{
+    use helix_core::LineEnding::*;
+    let line_ending = match context.doc.line_ending {
+        Crlf => "CRLF",
+        LF => "LF",
+    };
+
+    write(context, format!(" {} ", line_ending), None);
+}
+
 fn render_file_type<F>(context: &mut RenderContext, write: F)
 where
     F: Fn(&mut RenderContext, String, Option<Style>) + Copy,

helix-view/src/editor.rs

@@ -232,6 +232,9 @@ pub enum StatusLineElement {
     /// The file encoding
     FileEncoding,
 
+    /// The file line endings (CRLF or LF)
+    FileLineEnding,
+
     /// The file type (language ID or "text")
     FileType,