transparentbg plugin and whichkey update

lua/user/transparent.lua

@@ -0,0 +1,125 @@
+local M = {}
+
+local config = {
+  enable = false,
+  groups = {
+    "Normal",
+    "Comment",
+    "Constant",
+    "Special",
+    "Identifier",
+    "Statement",
+    "PreProc",
+    "Type",
+    "Underlined",
+    "Todo",
+    "String",
+    "Function",
+    "Conditional",
+    "Repeat",
+    "Operator",
+    "Structure",
+    "LineNr",
+    "NonText",
+    "SignColumn",
+    "CursorLineNr",
+    "EndOfBuffer",
+  },
+  extra_groups = {},
+  exclude = {},
+}
+
+local clear_group_bg = function(group, highlights)
+  if group then
+    if vim.tbl_contains(config.exclude, group) or vim.fn.highlight_exists(group) == 0 then
+      return
+    end
+    if not highlights then
+      highlights = vim.api.nvim_exec("highlight " .. group, true)
+    end
+  else
+    if highlights then
+      grou = vim.split(highlights, " ")[1]
+    else
+      return
+    end
+  end
+
+  if vim.tbl_contains(config.exclude, group) then
+    return
+  end
+
+  if highlights:match("links to") then
+    return
+  end
+
+  local term = highlights:match([[term=([%w#]+)]]) or "NONE"
+  local ctermfg = highlights:match([[ctermfg=([%w#]+)]]) or "NONE"
+  local gui = highlights:match([[gui=([%w#]+)]]) or "NONE"
+  local guifg = highlights:match([[guifg=([%w#]+)]]) or "NONE"
+  vim.cmd(
+    string.format(
+      "hi %s term=%s ctermfg=%s ctermbg=NONE gui=%s guifg=%s guibg=NONE",
+      group,
+      term,
+      ctermfg,
+      gui,
+      guifg
+    )
+  )
+end
+
+local function _clear_bg()
+  for _, group in ipairs(config.groups) do
+    clear_group_bg(group)
+  end
+
+  if type(config.extra_groups) == "string" then
+    if config.extra_groups == "all" then
+      local hls = vim.split(vim.api.nvim_exec("highlight", true), "\n")
+      for _, hl in ipairs(hls) do
+        clear_group_bg(nil, hl)
+      end
+    else
+      clear_group_bg(config.extra_groups)
+    end
+  else
+    for _, group in ipairs(config.extra_groups) do
+      clear_group_bg(group)
+    end
+  end
+end
+
+function M.clear_bg()
+  if vim.g.transparent_enabled ~= true then
+    return
+  end
+  -- ? some plugins calculate colors from basic highlights
+  -- : clear immediately
+  _clear_bg()
+  -- ? some plugins use autocommands to redefine highlights
+  -- : clear again after a while
+  vim.defer_fn(_clear_bg, 500)
+end
+
+function M.toggle_transparent(option)
+  if option == nil then
+    vim.g.transparent_enabled = not vim.g.transparent_enabled
+  else
+    vim.g.transparent_enabled = option
+  end
+  if vim.g.colors_name then
+    vim.cmd("colorscheme " .. vim.g.colors_name)
+  else
+    vim.cmd("doautocmd ColorScheme")
+  end
+end
+
+function M.setup(user_config)
+  config = vim.tbl_extend("force", config, user_config)
+  if vim.g.transparent_enabled == nil then
+    vim.g.transparent_enabled = config.enable
+  end
+end
+
+return Mp