Fix tab rendering to use dynamic tab width

Each tab is just wide enough to round to the nearest tab stop.

Refs #1243

1 files changed, 2 insertions, 1 deletions

diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index f9c5e55e..31a9bfc8 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -378,7 +378,8 @@ impl EditorView {
 
                             let (grapheme, width) = if grapheme == "\t" {
                                 // make sure we display tab as appropriate amount of spaces
-                                (tab.as_str(), tab_width)
+                                let visual_tab_width = tab_width - (visual_x as usize % tab_width);
+                                (&tab[..visual_tab_width], visual_tab_width)
                             } else {
                                 // Cow will prevent allocations if span contained in a single slice
                                 // which should really be the majority case