From 612f48f3cd1cd4f164e7b25b7920e7b4d12da781 Mon Sep 17 00:00:00 2001
From: Rock Boynton <rboynton@anduril.com>
Date: Mon, 23 Dec 2024 14:59:46 -0800
Subject: [PATCH] Show the primary selection index on statusline

Have the status line show the number of the current selection out of
the total in the file.

Right now, the `# sels` shows how many selections you have in the current
buffer, but this shows the (1-based) index at which which one your
primary cursor is on in the current buffer, i.e. `3/6 sels`, then if you
press `)`, it would say `4/6` sels etc.

This is very helpful when multiple selections are spread out beyond
a single view to orient oneself with the current selections.
---
 book/src/editor.md              |  2 +-
 helix-term/src/ui/statusline.rs | 10 ++++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/book/src/editor.md b/book/src/editor.md
index b79792058..c2a7af764 100644
--- a/book/src/editor.md
+++ b/book/src/editor.md
@@ -138,7 +138,7 @@ The following statusline elements can be configured:
 | `file-type` | The type of the opened file |
 | `diagnostics` | The number of warnings and/or errors |
 | `workspace-diagnostics` | The number of warnings and/or errors on workspace |
-| `selections` | The number of active selections |
+| `selections` | The primary selection index out of the number of active selections |
 | `primary-selection-length` | The number of characters currently in primary selection |
 | `position` | The cursor position |
 | `position-percentage` | The cursor position as a percentage of the total number of lines |
diff --git a/helix-term/src/ui/statusline.rs b/helix-term/src/ui/statusline.rs
index adf01bdad..5e3276817 100644
--- a/helix-term/src/ui/statusline.rs
+++ b/helix-term/src/ui/statusline.rs
@@ -347,10 +347,16 @@ fn render_selections<F>(context: &mut RenderContext, write: F)
 where
     F: Fn(&mut RenderContext, String, Option<Style>) + Copy,
 {
-    let count = context.doc.selection(context.view.id).len();
+    let selection = context.doc.selection(context.view.id);
+    let count = selection.len();
     write(
         context,
-        format!(" {} sel{} ", count, if count == 1 { "" } else { "s" }),
+        format!(
+            "{}/{} sel{} ",
+            selection.primary_index() + 1,
+            count,
+            if count == 1 { "" } else { "s" }
+        ),
         None,
     );
 }