stack_view: toggle to disable tree hl

tree hl is slow so adding option to disable it

README.md

@@ -118,6 +118,11 @@ _cscope_maps_ comes with following defaults:
       -- change cwd to where db_file is located
       change_cwd = false, -- "true" or "false"
     },
+  },
+
+  -- stack view defaults
+  stack_view = {
+    tree_hl = true, -- toggle tree highlighting
   }
 }
 ```

lua/cscope/stack_view/init.lua

@@ -4,6 +4,10 @@ local hl = require("cscope.stack_view.hl")
 local utils = require("cscope_maps.utils")
 local M = {}
 
+M.opts = {
+	tree_hl = true, -- toggle tree highlighting
+}
+
 -- m()
 -- -> a()
 -- -> b()
@@ -159,7 +163,9 @@ M.buf_update = function()
 		group = augroup,
 		buffer = M.cache.sv.buf,
 		callback = function()
-			hl.refresh(M.cache.sv.buf, root, #buf_lines)
+			if M.opts.tree_hl then
+				hl.refresh(M.cache.sv.buf, root, #buf_lines)
+			end
 			M.preview_update()
 		end,
 	})
@@ -373,7 +379,8 @@ M.set_user_cmd = function()
 	})
 end
 
-M.setup = function()
+M.setup = function(opts)
+	M.opts = vim.tbl_deep_extend("force", M.opts, opts)
 	M.set_user_cmd()
 end
 

lua/cscope_maps/init.lua

@@ -12,6 +12,7 @@ M.opts = {
 	skip_input_prompt = false, -- "true" doesn't ask for input
 	prefix = "<leader>c", -- prefix to trigger maps
 	cscope = {}, -- defaults are in cscope.lua
+	stack_view = {}, -- defaults are in stack_view
 }
 
 -- function to print xcscpoe.el like prompts
@@ -64,7 +65,7 @@ M.setup = function(opts)
 	end
 
 	cs.setup(M.opts.cscope)
-	require("cscope.stack_view").setup()
+	require("cscope.stack_view").setup(M.opts.stack_view)
 end
 
 return M