refactor(sign): store 'signcolumn' width range when it is set

Problem:  Minimum and maximum signcolumn width is determined each redraw.
Solution: Determine and store 'signcolumn' range when option is set.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/nvim/decoration.c b/src/nvim/decoration.c
index 48dffea24b..b784d8bea3 100644
--- a/src/nvim/decoration.c
+++ b/src/nvim/decoration.c
@@ -442,7 +442,9 @@ void decor_redraw_signs(win_T *wp, buf_T *buf, int row, SignTextAttrs sattrs[],
                         int *cul_id, int *num_id)
 {
   MarkTreeIter itr[1];
-  if (!buf->b_signs || !marktree_itr_get_overlap(buf->b_marktree, row, 0, itr)) {
+  if (!buf->b_signs
+      || wp->w_minscwidth == SCL_NO
+      || !marktree_itr_get_overlap(buf->b_marktree, row, 0, itr)) {
     return;
   }
 
@@ -471,7 +473,7 @@ void decor_redraw_signs(win_T *wp, buf_T *buf, int row, SignTextAttrs sattrs[],
   }
 
   if (kv_size(signs)) {
-    int width = (*wp->w_p_scl == 'n' && *(wp->w_p_scl + 1) == 'u') ? 1 : wp->w_scwidth;
+    int width = wp->w_minscwidth == SCL_NUM ? 1 : wp->w_scwidth;
     int idx = MIN(width, num_text) - 1;
     qsort((void *)&kv_A(signs, 0), kv_size(signs), sizeof(MTKey), sign_cmp);