mark listing entry when details are visible

lua/test-samurai/core.lua

@@ -28,6 +28,7 @@ local state = {
   trigger_cursor = nil,
   listing_unfiltered_lines = nil,
   listing_filtered_kind = nil,
+  detail_line = nil,
   hardtime_refcount = 0,
   hardtime_was_enabled = false,
   autocmds_set = false,
@@ -37,6 +38,7 @@ local summary_ns = vim.api.nvim_create_namespace("TestSamuraiSummary")
 local result_ns = vim.api.nvim_create_namespace("TestSamuraiResult")
 local detail_ns = vim.api.nvim_create_namespace("TestSamuraiDetailAnsi")
 local help_ns = vim.api.nvim_create_namespace("TestSamuraiHelp")
+local listing_sel_ns = vim.api.nvim_create_namespace("TestSamuraiListingSelection")
 local apply_border_kind
 local close_container
 local restore_listing_full
@@ -100,6 +102,7 @@ local function help_lines()
     "",
     "Notes:",
     "  No output captured -> shows placeholder text",
+    "  Active listing entry is highlighted while Detail-Float is visible",
     "  Buffers are saved via :wall before every test run",
   }
 end
@@ -149,6 +152,7 @@ local function apply_listing_lines(buf, lines)
   vim.api.nvim_buf_set_lines(buf, 0, -1, false, lines)
   vim.api.nvim_buf_clear_namespace(buf, result_ns, 0, -1)
   vim.api.nvim_buf_clear_namespace(buf, summary_ns, 0, -1)
+  vim.api.nvim_buf_clear_namespace(buf, listing_sel_ns, 0, -1)
   apply_result_highlights(buf, 0, lines)
   apply_summary_highlights(buf, 0, lines)
   rebuild_result_line_map(lines)
@@ -382,6 +386,30 @@ local function jump_listing_and_open(kind)
   end
 end
 
+local function clear_listing_selection()
+  if state.last_buf and vim.api.nvim_buf_is_valid(state.last_buf) then
+    vim.api.nvim_buf_clear_namespace(state.last_buf, listing_sel_ns, 0, -1)
+  end
+  state.detail_line = nil
+end
+
+local function apply_listing_selection(line)
+  if not (state.last_buf and vim.api.nvim_buf_is_valid(state.last_buf)) then
+    return
+  end
+  vim.api.nvim_buf_clear_namespace(state.last_buf, listing_sel_ns, 0, -1)
+  if not line then
+    state.detail_line = nil
+    return
+  end
+  local total = vim.api.nvim_buf_line_count(state.last_buf)
+  if line < 1 or line > total then
+    return
+  end
+  vim.api.nvim_buf_add_highlight(state.last_buf, listing_sel_ns, "TestSamuraiListingActive", line - 1, 0, -1)
+  state.detail_line = line
+end
+
 local function find_normal_window()
   for _, win in ipairs(vim.api.nvim_tabpage_list_wins(0)) do
     local cfg = vim.api.nvim_win_get_config(win)
@@ -534,6 +562,7 @@ local function setup_summary_highlights()
   pcall(vim.api.nvim_set_hl, 0, "TestSamuraiResultSkip", { fg = skip_fg })
   pcall(vim.api.nvim_set_hl, 0, "TestSamuraiBorderPass", { fg = pass_fg, bold = true })
   pcall(vim.api.nvim_set_hl, 0, "TestSamuraiBorderFail", { fg = fail_fg, bold = true })
+  pcall(vim.api.nvim_set_hl, 0, "TestSamuraiListingActive", { link = "Visual" })
 end
 
 local function load_runners()
@@ -567,6 +596,7 @@ local function ensure_output_autocmds()
       if state.detail_win and closed == state.detail_win then
         state.detail_win = nil
         restore_listing_full()
+        clear_listing_selection()
         hardtime_restore()
         return
       end
@@ -577,6 +607,7 @@ local function ensure_output_autocmds()
           pcall(vim.api.nvim_win_close, state.detail_win, true)
           state.detail_win = nil
         end
+        clear_listing_selection()
         return
       end
     end,
@@ -744,6 +775,7 @@ close_container = function()
     pcall(vim.api.nvim_win_close, state.last_win, true)
     state.last_win = nil
   end
+  clear_listing_selection()
 end
 
 local function close_container_and_restore()
@@ -763,6 +795,7 @@ close_detail_float = function()
   if state.detail_win and vim.api.nvim_win_is_valid(state.detail_win) then
     pcall(vim.api.nvim_win_close, state.detail_win, true)
   end
+  clear_listing_selection()
 end
 
 restore_listing_full = function()
@@ -1472,10 +1505,12 @@ function M.open_test_output_at_cursor()
   end
   if type(output) ~= "table" or #output == 0 then
     open_detail_split({ "", "No output captured" }, "default")
+    apply_listing_selection(line)
     return
   end
   local border_kind = status and status:lower() or nil
   open_detail_split(output, border_kind)
+  apply_listing_selection(line)
 end
 
 function M.show_help()
@@ -1485,6 +1520,7 @@ function M.show_help()
   end
   local lines = help_lines()
   open_detail_split(lines, "default")
+  clear_listing_selection()
   apply_help_highlights(state.detail_buf, lines)
 end