Element-specific key mappings (for dap-repl and dapui_... windows)

[wookayin]

Can I configure (buffer-local) keymaps for each of the DAP UI elements?

For instance, I would like to map <CR> to the open action for the "DAP Stacks" element. The current behavior of <CR> in this stack frame widget is just a warning message: "No expand action for current line". It would be more intuitive (as a default behavior or for customization) to have <CR> mapped to some action, or re-mapped to o.

Also, users may want to have a lot of custom key mappings. When it comes to dap-repl, it is possible by making a FileType autocmd event as follows:

  vim.api.nvim_create_autocmd("FileType", {
    pattern = "dap-repl",
    group = ... ,  -- some augroup
    callback = function()
      -- Example: Map CTRL-L to clear the clear REPL
      vim.keymap.set('i', '<c-l>', function() dap.repl.clear() end, { buffer = true, desc = 'Clear REPL' })
      -- and more...
    end,
  })

However this does NOT work for dapui_xxx elements. Custom keymaps mapped for filetypes dapui_stacks, dapui_watches, etc. will be lost as dapui would try to reassign the buf-local keymaps during an execution of dapui.render.canvas.render_buffer() when the content changes.

[rcarriga]

You can now add element specific mappings by adding this to your setup

  element_mappings = {
    stacks = {
      open = "<CR>",
      expand = "o",
    }
  },

[wookayin]

Thank you, that works well for dapui elements.