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- # coc-snippets
-
- Snippets solution for [coc.nvim](https://github.com/neoclide/coc.nvim)
-
- ![2019-03-23 00_09_39](https://user-images.githubusercontent.com/251450/54837017-62891300-4d00-11e9-9e53-49742a1a33f2.gif)
-
- _Snippet preview requires [neovim 0.4 or latest vim8](https://github.com/neoclide/coc.nvim/wiki/F.A.Q#how-to-make-preview-window-shown-aside-with-pum)_
-
- It's capable of:
-
- - Load UltiSnips snippets.
- - Load snipmate snippets.
- - Load VSCode snippets from coc extensions.
- - Load VSCode snippets from custom directories.
- - Load UltiSnips snippets from configured folder.
- - Provide snippets as completion items.
- - Provide expand and expandOrJump keymaps for snippet.
- - Provide snippets list for edit snippet.
- - Provide `snippets.editSnippets` command for edit user snippets of current filetype.
-
- **Note:** some features of ultisnips and snipmate format snippets not supported, checkout [faq](#faq).
-
- ## Why?
-
- - Use same keys for jump placeholder.
- - Nested snippet support.
- - Always async, never slows you down.
- - Improved match for complete items with TextEdit support.
- - Edit snippets of current buffer by `:CocList snippets`, sorted by mru.
-
- ## Install
-
- In your vim/neovim, run command:
-
- ```
- :CocInstall coc-snippets
- ```
-
- ## Examples
-
- ```vim
- " Use <C-l> for trigger snippet expand.
- imap <C-l> <Plug>(coc-snippets-expand)
-
- " Use <C-j> for select text for visual placeholder of snippet.
- vmap <C-j> <Plug>(coc-snippets-select)
-
- " Use <C-j> for jump to next placeholder, it's default of coc.nvim
- let g:coc_snippet_next = '<c-j>'
-
- " Use <C-k> for jump to previous placeholder, it's default of coc.nvim
- let g:coc_snippet_prev = '<c-k>'
-
- " Use <C-j> for both expand and jump (make expand higher priority.)
- imap <C-j> <Plug>(coc-snippets-expand-jump)
- ```
-
- Make `<tab>` used for trigger completion, completion confirm, snippet expand and jump like VSCode.
-
- ```vim
- inoremap <silent><expr> <TAB>
- \ pumvisible() ? coc#_select_confirm() :
- \ coc#expandableOrJumpable() ? "\<C-r>=coc#rpc#request('doKeymap', ['snippets-expand-jump',''])\<CR>" :
- \ <SID>check_back_space() ? "\<TAB>" :
- \ coc#refresh()
-
- function! s:check_back_space() abort
- let col = col('.') - 1
- return !col || getline('.')[col - 1] =~# '\s'
- endfunction
-
- let g:coc_snippet_next = '<tab>'
- ```
-
- **Note:** `coc#_select_confirm()` helps select first complete item when there's
- no complete item selected, neovim 0.4 or latest vim8 required for this function
- work as expected.
-
- ## Ultisnips features
-
- Some ultisnips features are **not** supported:
-
- - [x] Position check of trigger option, including `b`, `w` and `i`.
- - [x] Execute vim, python and shell code in snippet.
- - [x] `extends`, `priority` and `clearsnippets` command in snippet file.
- - [x] Visual placeholder.
- - [x] Placeholder and variable transform.
- - [x] Expression snippet.
- - [x] Automatic trigger snippet.
- - [x] Context snippets.
- - [x] Support loading snipmate snippets.
- - [ ] Execute shell code with custom shabang (will not support).
- - [ ] Automatic reformat snippet after change of placeholder (can't support).
- - [ ] Format related snippet options, including `t`, `s` and `m` (can't support).
- - [ ] Snippet actions (can't support).
-
- **Note**: python regex in snippet are converted to javascript regex, however,
- some regex patterns can't be supported by javascript, including
- `\u` `(?s)` `\Z` `(?(id/name)yes-pattern|no-pattern)`.
-
- ## Options
-
- - `snippets.priority`: priority of snippets source, default `90`.
- - `snippets.editSnippetsCommand`: Open command used for snippets.editSnippets command, use coc.preferences.jumpCommand by default.
- - `snippets.trace`: Trace level of snippets channel.
- - `snippets.enableStatusItem`: Enable status item in `g:coc_status` used for statusline.
- - `snippets.extends`: extends filetype's snippets with other filetypes, example:
-
- ```json
- {
- "cpp": ["c"],
- "javascriptreact": ["javascript"],
- "typescript": ["javascript"]
- }
- ```
-
- - `snippets.userSnippetsDirectory`, Directory that contains custom user ultisnips snippets, use ultisnips in extension root by default.
- - `snippets.shortcut`, shortcut in completion menu, default `S`.
- - `snippets.autoTrigger`: enable auto trigger for auto trigger ultisnips snippets, default `true`.
- - `snippets.triggerCharacters`: trigger characters for completion, default `[]`.
- - `snippets.loadFromExtensions`: load snippets from coc.nvim extensions, default: `true`.
- - `snippets.convertToSnippetsAction`: Add convert to snippet to code action list.
- - `snippets.textmateSnippetsRoots`: absolute directories that contains textmate/VSCode snippets to load.
- - `snippets.ultisnips.enable`: enable load UltiSnips snippets, default `true`.
- - `snippets.ultisnips.usePythonx`: use `pythonx` for eval python code when possible, default `true`.
- - `snippets.ultisnips.pythonVersion`: when `usePythonx` is false, python version to use for
- python code, default to `3`.
- - `snippets.ultisnips.directories`: directories that searched for snippet files,
- could be subfolder in every \$runtimepath or absolute paths, default: `["UltiSnips"]`
- - `snippets.snipmate.enable`: enable load snipmate snippets, default `true`.
- - `snippets.snippets.author`: author name used for `g:snips_author`
-
- ## Commands
-
- - Use `:CocList snippets` to open snippets list.
- - Use `:CocCommand snippets.editSnippets` to edit user snippet of current filetype.
- - Use `:CocCommand snippets.openSnippetFiles` to open snippet files of current filetype.
-
- ## F.A.Q
-
- **Q:** How to check if a snippet successfully loaded?
-
- **A:** Use command `:CocCommand workspace.showOutput snippets`
-
- **Q:** Some ultisnips snippet not works as expected.
-
- **A:** Reformat after change of placeholder feature can't be supported for now,
- and some regex pattern can't be converted to javascript regex pattern, so the
- snippet can be failed to load.
-
- **Q:** Where to get snippets?
-
- **A:** One solution is install [honza/vim-snippets](https://github.com/honza/vim-snippets) which is widely used.
-
- **Q:** Do I need to install [Ultisnips](https://github.com/SirVer/ultisnips).
-
- **A:** No! This extension is designed to work with or without Ultisnips, you can
- still install Ultisnips, but this extension would not run any code or read
- configuration from it.
-
- **Q:** How to check jumpable or expandable at current position.
-
- **A:** Use functions provided by coc.nvim: `coc#expandable()` `coc#jumpable()` and `coc#expandableOrJumpable()`.
-
- **Q:** It doesn't load snippets from [vim-go](https://github.com/fatih/vim-go).
-
- **A:** It uses `g:UltiSnipsSnippetDirectories` which is not supported, you can
- add settings:
-
- ```
- snippets.ultisnips.directories: [
- "UltiSnips",
- "gosnippets/UltiSnips"
- ],
- ```
-
- to load it.
-
- **Q:** How could I add custom UltiSnips snippets.
-
- **A:** You can create snippet files in folder: `$VIMCONFIG/coc/ultisnips`, use
- command `:CocCommand snippets.editSnippets` to open user snippet of current
- filetype.
-
- ## License
-
- MIT
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