How can I go to the definition (gD) in a new tab?

Question

I am using Typescript and I have this config for going to the definition when hovering over a function name:

vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts) -- does not work
vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts) -- works

When I enter gD, it returns the following error:

method textDocument/declaration is not supported by any of the servers registered for the current buffer

I'd like to open the file containing the function definition in a new tab. Is this possible?

Answer 1

I believe you don't have the distinction declaration and definition in typescript like you have it in C or C++.

myfile.h

// declaration
int myfunction(int a, char *name);

myfile.c

// definition
int myfunction(int a, char *name)
{
  return a * a;
}

In typescript you have only a definition that that is probably why gD is not working but gd should do the job for you.

To open the definition in a new tab if it is another file you could do:

vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)

vim.keymap.set('n', 'gD', function()
        local org_path = vim.api.nvim_buf_get_name(0)

        -- Go to definition:
        vim.api.nvim_command('normal gd')

        -- Wait LSP server response
        vim.wait(100, function() end)

        local new_path = vim.api.nvim_buf_get_name(0)
        if not (org_path == new_path) then
            -- Create a new tab for the original file
            vim.api.nvim_command('0tabnew %')

            -- Restore the cursor position
            vim.api.nvim_command('b ' .. org_path)
            vim.api.nvim_command('normal! `"')

            -- Switch to the original tab
            vim.api.nvim_command('normal! gt')
        end
    end, bufopts)