SpaceVim/docs/layers/autocomplete.md

title	description
SpaceVim autocomplete layer	Autocomplete code within SpaceVim, fuzzy find the candidates from multiple completion sources, expand snippet before cursor automatically

Home >> Layers >> autocomplete

• Description
• Install
• Configuration
  • Completion engine
  • Snippets engine
  • Complete parens
  • Layer options
  • Show snippets in auto-completion popup
• Key bindings
  • Completion
  • Snippets

Description

This layer provides auto-completion in SpaceVim.

The following completion engines are supported:

• nvim-cmp - neovim >= 0.9.0
• neocomplete - vim with +lua
• neocomplcache - vim without +lua
• deoplete - neovim with +python3
• coc - vim >= 8.1 or neovim >= 0.3.1
• YouCompleteMe - disabled by default, to enable ycm, see :h g:spacevim_enable_ycm
• Completor - vim8 with +python or +python3
• asyncomplete - vim8 or neovim with timers

Snippets are supported via neosnippet.

Install

To use this configuration layer, add the following snippet to your custom configuration file:

[[layers]]
  name = "autocomplete"

Configuration

Completion engine

By default, SpaceVim will choose the completion engine automatically based on your vim version. But you can choose the completion engine to be used with the following variable:

• autocomplete_method: the possible values are:
  • ycm: for YouCompleteMe
  • neocomplcache
  • coc: coc.nvim which also provides language server protocol feature
  • deoplete
  • asyncomplete
  • completor
  • nvim-cmp

here is an example:

[options]
    autocomplete_method = "deoplete"

Snippets engine

The default snippets engine is neosnippet, the also can be changed to ultisnips:

[options]
    snippet_engine = "ultisnips"

The following snippets repos have been added by default:

• Shougo/neosnippet-snippets : neosnippet's default snippets.
• honza/vim-snippets : extra snippets

If the snippet_engine is neosnippet, the following directories will be used:

• ~/.SpaceVim/snippets/: SpaceVim runtime snippets.
• ~/.SpaceVim.d/snippets/: custom global snippets.
• ./.SpaceVim.d/snippets/: custom local snippets (project's snippets)

You can provide additional directories by setting the variable g:neosnippet#snippets_directory which can take a string in case of a single path or a list of paths.

If the snippet_engine is ultisnips, the following directories will be used:

• ~/.SpaceVim/UltiSnips/: SpaceVim runtime snippets.
• ~/.SpaceVim.d/UltiSnips/: custom global snippets.
• ./.SpaceVim.d/UltiSnips/: custom local snippets (project's snippets)

Complete parens

By default, the parens will be completed automatically, to disabled this feature:

[options]
    autocomplete_parens = false

Layer options

You can customize the user experience of autocompletion with the following layer variables:

1. auto_completion_return_key_behavior set the action to perform when the Return/Enter key is pressed. the possible values are:
   • complete completes with the current selection
   • smart completes with current selection and expand snippet or argvs
   • nil By default it is complete.
2. auto_completion_tab_key_behavior set the action to perform when the TAB key is pressed, the possible values are:
   • smart cycle candidates, expand snippets, jump parameters
   • complete completes with the current selection
   • cycle completes the common prefix and cycle between candidates
   • nil insert a carriage return By default it is complete.
3. auto_completion_delay is a number to delay the completion after input in milliseconds, by default it is 50 ms.
4. auto_completion_complete_with_key_sequence is a string of two characters denoting a key sequence that will perform a complete action if the sequence as been entered quickly enough. If its value is nil then the feature is disabled. NOTE: This option should not has same value as escape_key_binding
5. auto_completion_complete_with_key_sequence_delay is the number of seconds to wait for the autocompletion key sequence to be entered. The default value is 1 seconds. This option is used for vim's timeoutlen option in insert mode.

The default configuration of the layer is:

[[layers]]
  name = "autocomplete"
  auto_completion_return_key_behavior = "nil"
  auto_completion_tab_key_behavior = "smart"
  auto_completion_delay = 200
  auto_completion_complete_with_key_sequence = "nil"
  auto_completion_complete_with_key_sequence_delay = 0.1

jk is a good candidate for auto_completion_complete_with_key_sequence if you don’t use it already.

Show snippets in auto-completion popup

By default, snippets are shown in the auto-completion popup. To disable this feature, set the variable auto_completion_enable_snippets_in_popup to false.

[[layers]]
  name = "autocomplete"
  auto_completion_enable_snippets_in_popup = false

Key bindings

Completion

Key bindings	Description
Ctrl-n	select next candidate
Ctrl-p	select previous candidate
<Tab>	based on auto_completion_tab_key_behavior
Shift-Tab	select previous candidate
<Return>	based on auto_completion_return_key_behavior

Snippets

Key Binding	Description
M-/	Expand a snippet if text before point is a prefix of a snippet
SPC i s	List all current snippets for inserting
<Leader> f s	Fuzzy find Ultisnips snippets if snippet_engine = "ultisnips" and the layer telescope is used. Thanks to telescope-ultisnips.nvim

NOTE: SPC i s requires that at least one fuzzy search layer be loaded. If the snippet_engine is neosnippet. The fuzzy finder layer can be leaderf, denite or unite. For ultisnips, you can use leaderf or unite layer.