add position-percentage as a statusline indicator

book/src/configuration.md

@@ -78,6 +78,7 @@ The following elements can be configured:
 | `diagnostics` | The number of warnings and/or errors |
 | `selections` | The number of active selections |
 | `position` | The cursor position |
+| `position-pct` | The cursor position as a percentage of the total number of lines |
 
 ### `[editor.lsp]` Section
 

helix-term/src/ui/statusline.rs

@@ -1,4 +1,4 @@
-use helix_core::{coords_at_pos, encoding};
+use helix_core::{coords_at_pos, encoding, Position};
 use helix_view::{
     document::{Mode, SCRATCH_BUFFER_NAME},
     graphics::Rect,
@@ -143,6 +143,7 @@ where
         helix_view::editor::StatusLineElement::Diagnostics => render_diagnostics,
         helix_view::editor::StatusLineElement::Selections => render_selections,
         helix_view::editor::StatusLineElement::Position => render_position,
+        helix_view::editor::StatusLineElement::PositionPct => render_position_pct,
     }
 }
 
@@ -250,26 +251,42 @@ where
     );
 }
 
-fn render_position<F>(context: &mut RenderContext, write: F)
-where
-    F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
-{
-    let position = coords_at_pos(
+fn get_position(context: &RenderContext) -> Position {
+    coords_at_pos(
         context.doc.text().slice(..),
         context
             .doc
             .selection(context.view.id)
             .primary()
             .cursor(context.doc.text().slice(..)),
-    );
+    )
+}
 
+fn render_position<F>(context: &mut RenderContext, write: F)
+where
+    F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
+{
+    let position = get_position(context);
     write(
         context,
         format!(" {}:{} ", position.row + 1, position.col + 1),
         None,
     );
 }
 
+fn render_position_pct<F>(context: &mut RenderContext, write: F)
+where
+    F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
+{
+    let position = get_position(context);
+    let maxrows = context.doc.text().len_lines();
+    write(
+        context,
+        format!("{}%", (position.row + 1) * 100 / maxrows),
+        None,
+    );
+}
+
 fn render_file_encoding<F>(context: &mut RenderContext, write: F)
 where
     F: Fn(&mut RenderContext, String, Option<Style>) + Copy,

helix-view/src/editor.rs

@@ -246,6 +246,9 @@ pub enum StatusLineElement {
 
     /// The cursor position
     Position,
+
+    /// The cursor position as a percent of the total file
+    PositionPct,
 }
 
 // Cursor shape is read and used on every rendered frame and so needs