feat: theme the statusline

neovim/lua/statusline.lua

@@ -33,36 +33,72 @@ function _G.format_mode(mode)
     output = mode
   end
 
-  return output
+  return string.upper(output)
+end
+
+local function setHighlight(str)
+  return string.format("%%#%s#", str)
 end
 
 function M.output()
-  local separator = "☰ "
-  local mode = "%{%v:lua.format_mode(v:lua.vim.fn.mode())%}  "
-  local open_file = separator .. "%r%t %m"
-  local buf_nr = "[%n]"
+  local palette = {
+    cyan    = "#7dcfff",
+    blue    = "#7aa2f7",
+    magenta = "#bb9af7",
+    black   = "#414868",
+    bg      = "#15161e",
+    none    = "NONE",
+  }
+
+  local statuslineMode        = "StatuslineMode"
+  local statuslineTransparent = "StatuslineTransparent"
+  local statuslineBlueText    = "StatuslineBlueText"
+  local statuslineMagentaText = "StatuslineMagentaText"
+
+  local theme = {
+    [statuslineMode]        = {fg = palette["black"], bg = palette["cyan"], bold = true},
+    [statuslineTransparent] = {bg = palette["none"]},
+    [statuslineBlueText]    = {bg = palette["bg"], fg = palette["blue"], bold = true},
+    [statuslineMagentaText] = {bg = palette["bg"], fg = palette["magenta"], bold = true},
+  }
+
+  local ns = vim.api.nvim_create_namespace("statusline")
+  vim.api.nvim__set_hl_ns(ns)
+
+  for name, settings in pairs(theme) do
+    vim.api.nvim_set_hl(ns, name, settings)
+  end
+
+  local separator   = " ☰ "
+  local mode        = " %{%v:lua.format_mode(v:lua.vim.fn.mode())%} "
+  local open_file   = "%r%t %m"
+  local buf_nr      = "[%n] "
   local right_align = "%="
   local file_format = "%{&ff}"
-  local file_type = "%y "
-  local encoding = "%{''.(&fenc!=''?&fenc:&enc).''}  "
-  local line_no = "line: %03l/%03L "
-  local percentage = "[%3p%%]"
+  local file_type   = "%y "
+  local encoding    = "%{''.(&fenc!=''?&fenc:&enc).''} "
+  local line_no     = "line: %03l/%03L "
+  local percentage  = "[%3p%%]"
 
-  return string.format(
-    "%s%s%s%s%s%s%s%s%s%s%s%s",
-    separator,
+  return table.concat{
+    setHighlight(statuslineMode),
     mode,
+    setHighlight(statuslineBlueText),
+    separator,
     open_file,
     buf_nr,
+    setHighlight(statuslineTransparent),
     right_align,
+    setHighlight(statuslineBlueText),
     separator,
     file_format,
     file_type,
     encoding,
+    setHighlight(statuslineMagentaText),
     separator,
     line_no,
     percentage
-  )
+  }
 end
 
 return M