Attach treesitter highlighting to input window

[jonathan-elize]

This is something I came up with today because I wanted to be able to see syntax highlighting in my input based on the file the input window derived from.

Here's an example of how things look:

Here's the code snippet for this:

vim.api.nvim_create_autocmd({ "WinEnter" }, {
  desc = "Attach treesitter highlighting to Dressing Input",
  callback = function(args)
    local source_bufnr = args.buf
    vim.schedule(function()
      local winnr = vim.fn.winnr()
      local bufnr = vim.fn.winbufnr(winnr)
      local ft = vim.fn.getbufvar(bufnr, "&ft")
      if ft == "DressingInput" then
        local source_ft = vim.fn.getbufvar(source_bufnr, "&ft")
        if source_ft == nil then
          source_ft = "lua"
        end
        local has_parser = require("nvim-treesitter.parsers").has_parser(source_ft)
        if not has_parser then
          return
        end
        require("nvim-treesitter.configs").reattach_module("highlight", bufnr, source_ft)
      end
    end)
  end,
})