Problem:
Given that `vim.snippet.expand()` sets temporary `<tab>`/`<s-tab>`
keymaps there is no way to build "smart-tab" functionality where `<tab>`
chooses the next completion candidate if the popup menu is visible.
Solution:
Set the keymap permanent in `_defaults`.
The downside of this approach is that users of multiple snippet engine's
need to adapt their keymaps to handle all their engines that are in use.
For example:
vim.keymap.set({ 'i', 's' }, "<Tab>", function()
if foreign_snippet.active() then
return "<Cmd>lua require('foreign_snippet').jump()<CR>"
elseif vim.snippet.active({ direction = 1 }) then
return "<Cmd>lua vim.snippet.jump(1)<CR>"
else
return key
end
end, { expr = true })
Upside is that using `vim.keymap.set` to override keymaps is a well
established pattern and `vim.snippet.expand` calls made by nvim itself
or plugins have working keymaps out of the box.
Co-authored-by: Maria José Solano <majosolano99@gmail.com>