From 8f0b9ed656d7b92eb0d60c34b6a5bd3803cc0e0b Mon Sep 17 00:00:00 2001
From: Folke Lemaitre <folke.lemaitre@gmail.com>
Date: Wed, 21 Jun 2023 16:53:56 +0200
Subject: [PATCH] feat(labeler): reuse only lowercase labels by default. See
 #11

---
 lua/flash/config.lua  | 3 +++
 lua/flash/labeler.lua | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/lua/flash/config.lua b/lua/flash/config.lua
index 5c98ec3..936cff2 100644
--- a/lua/flash/config.lua
+++ b/lua/flash/config.lua
@@ -55,6 +55,9 @@ local defaults = {
       before = false, ---@type boolean|number[]
       -- position of the label extmark
       style = "overlay", ---@type "eol" | "overlay" | "right_align" | "inline"
+      -- flash tries to re-use labels that were already assigned to a position,
+      -- when typing more characters. By default only lower-case labels are re-used.
+      reuse = "lowercase", ---@type "lowercase" | "all"
     },
     -- show a backdrop with hl FlashBackdrop
     backdrop = true,
diff --git a/lua/flash/labeler.lua b/lua/flash/labeler.lua
index 0151f4f..c989836 100644
--- a/lua/flash/labeler.lua
+++ b/lua/flash/labeler.lua
@@ -77,7 +77,9 @@ function M:label(m, used)
   end
   if label and self:valid(label) then
     self:use(label)
-    self.used[pos] = label
+    if self.state.opts.highlight.label.reuse ~= "lowercase" or label:lower() == label then
+      self.used[pos] = label
+    end
     m.label = label
   end
   return #self.labels > 0