feat: Winhl options for outline and preview windows

lua/symbols-outline/config.lua

@@ -28,16 +28,16 @@ M.defaults = {
     show_numbers = false,
     show_relative_numbers = false,
     show_cursorline = true,
+    winhl = "SymbolsOutlineDetails:Comment,SymbolsOutlineLineno:LineNr",
   },
   preview_window = {
     auto_preview = false,
     width = 50,
     min_width = 50,
     relative_width = true,
-    bg_hl = 'Pmenu',
     border = 'single',
-    border_hl = 'Pmenu',
     open_hover_on_preview = true,
+    winhl = '',
     winblend = 0,
   },
   symbol_folding = {

lua/symbols-outline/preview.lua

@@ -94,12 +94,8 @@ local function setup_preview_buf()
 end
 
 local function set_bg_hl()
-  local winhi = 'Normal:' .. cfg.o.preview_window.bg_hl
-  vim.api.nvim_win_set_option(state.preview_win, 'winhighlight', winhi)
-  -- vim.api.nvim_win_set_option(state.hover_win, 'winhighlight', winhi)
-  local winblend = cfg.o.preview_window.winblend
-  vim.api.nvim_win_set_option(state.preview_win, 'winblend', winblend)
-  -- vim.api.nvim_win_set_option(state.hover_win, 'winblend', winblend)
+  vim.api.nvim_win_set_option(state.preview_win, 'winhl', cfg.o.preview_window.winhl)
+  vim.api.nvim_win_set_option(state.preview_win, 'winblend', cfg.o.preview_window.winblend)
 end
 
 local function show_preview()

lua/symbols-outline/ui.lua

@@ -10,7 +10,7 @@ function M.add_hover_highlight(bufnr, line, col_start)
   vim.api.nvim_buf_add_highlight(
     bufnr,
     M.hovered_hl_ns,
-    'FocusedSymbol',
+    'SymbolsOutlineCurrent',
     line,
     col_start,
     -1
@@ -18,15 +18,15 @@ function M.add_hover_highlight(bufnr, line, col_start)
 end
 
 function M.setup_highlights()
-  -- Setup the FocusedSymbol highlight group if it hasn't been done already by
+  -- Setup the SymbolsOutlineCurrent highlight group if it hasn't been done already by
   -- a theme or manually set
-  if vim.fn.hlexists 'FocusedSymbol' == 0 then
+  if vim.fn.hlexists 'SymbolsOutlineCurrent' == 0 then
     local cline_hl = vim.api.nvim_get_hl_by_name('CursorLine', true)
     local string_hl = vim.api.nvim_get_hl_by_name('String', true)
 
     vim.api.nvim_set_hl(
       0,
-      'FocusedSymbol',
+      'SymbolsOutlineCurrent',
       { bg = cline_hl.background, fg = string_hl.foreground }
     )
   end

lua/symbols-outline/view.lua

@@ -31,6 +31,7 @@ function View:setup_view()
   vim.api.nvim_win_set_option(self.winnr, 'winfixwidth', true)
   vim.api.nvim_win_set_option(self.winnr, 'list', false)
   vim.api.nvim_win_set_option(self.winnr, 'wrap', cfg.o.outline_window.wrap)
+  vim.api.nvim_win_set_option(self.winnr, 'winhl', cfg.o.outline_window.winhl)
   vim.api.nvim_win_set_option(self.winnr, 'linebreak', true) -- only has effect when wrap=true
   vim.api.nvim_win_set_option(self.winnr, 'breakindent', true) -- only has effect when wrap=true
   --  Would be nice to use guides.markers.vertical as part of showbreak to keep

lua/symbols-outline/writer.lua

@@ -58,7 +58,7 @@ function M.write_details(bufnr, lines)
 
   for index, value in ipairs(lines) do
     vim.api.nvim_buf_set_extmark(bufnr, ns, index - 1, -1, {
-      virt_text = { { value, 'Comment' } },
+      virt_text = { { value, 'SymbolsOutlineDetails' } },
       virt_text_pos = 'eol',
       hl_mode = 'combine',
     })
@@ -77,7 +77,7 @@ function M.write_lineno(bufnr, lines, max)
   for index, value in ipairs(lines) do
     local leftpad = string.rep(' ', maxwidth-#value)
     vim.api.nvim_buf_set_extmark(bufnr, ns, index - 1, -1, {
-      virt_text = { {leftpad..value, 'LineNr' } },
+      virt_text = { {leftpad..value, 'SymbolsOutlineLineno' } },
       virt_text_pos = 'overlay',
       virt_text_win_col = 0,
       hl_mode = 'combine',