feat: Allow disabling icons

lua/outline/init.lua

@@ -299,7 +299,7 @@ function M._highlight_current_item(winnr)
 
     if
       value.line == hovered_line
-      or (hovered_line > value.range_start and hovered_line < value.range_end)
+      or (hovered_line >= value.range_start and hovered_line <= value.range_end)
     then
       value.hovered = true
       table.insert(parent_nodes, value)

lua/outline/symbols.lua

@@ -51,7 +51,8 @@ function M.icon_from_kind(kind)
 
   if type(cfg.o.symbols.icon_fetcher) == 'function' then
     local icon = cfg.o.symbols.icon_fetcher(kindstr)
-    if icon and icon ~= "" then
+    -- Allow returning empty string
+    if icon then
       return icon
     end
   end

lua/outline/writer.lua

@@ -220,11 +220,18 @@ function M.make_outline(bufnr, items, codewin)
       add_fold_hl(total_pref_len - fold_marker_width, total_pref_len + 1)
     end
 
-    local line = lineno_prefix..pref_str..' '..node.icon..' '..node.name
+    local line = lineno_prefix..pref_str
+    local icon_pref = 0
+    if node.icon ~= "" then
+      line = line..' '..node.icon
+      icon_pref = 1
+    end
+    line = line..' '..node.name
 
     -- Highlight for the icon ✨
-    local hl_start = #pref_str + #lineno_prefix + 1  -- Start from icon col
-    local hl_end = hl_start + #node.icon             -- until after icon
+    -- Start from icon col
+    local hl_start = #pref_str + #lineno_prefix + icon_pref
+    local hl_end = hl_start + #node.icon  -- until after icon
     local hl_type = cfg.o.symbols.icons[symbols.kinds[node.kind]].hl
     table.insert(hl, { #flattened, hl_start, hl_end, hl_type })