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neovim-flake/docs/manual/hacking/keybinds.md
Ching Pei Yang b39b84490f
Docs/map rewrite ()
* doc: fix formatting

* docs: update keymaps section
2024-10-06 14:03:21 +00:00

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# Keybinds {#sec-keybinds}
As of 0.4, there exists an API for writing your own keybinds and a couple of
useful utility functions are available in the [extended standard
library](https://github.com/NotAShelf/nvf/tree/main/lib). The following
section contains a general overview to how you may utilize said functions.
## Custom Key Mappings Support for a Plugin {#sec-custom-key-mappings}
To set a mapping, you should define it in `vim.keymaps`.
An example, simple keybinding, can look like this:
```nix
{
vim.keymaps = [
{
key = "<leader>wq";
mode = ["n"];
action = ":wq<CR>";
silent = true;
desc = "Save file and quit";
}
];
}
```
There are many settings available in the options. Please refer to the
[documentation](https://notashelf.github.io/nvf/options.html#opt-vim.keymaps)
to see a list of them.
**nvf** provides a list of helper commands, so that you don't have to write the
mapping attribute sets every time:
- `mkBinding = key: action: desc:` - makes a basic binding, with `silent` set
to true.
- `mkExprBinding = key: action: desc:` - makes an expression binding, with
`lua`, `silent`, and `expr` set to true.
- `mkLuaBinding = key: action: desc:` - makes an expression binding, with
`lua`, and `silent` set to true.
Do note that the Lua in these bindings is actual Lua, and not pasted into a
`:lua` command. Therefore, you should either pass in a function like
`require('someplugin').some_function`, without actually calling it, or you
should define your own functions, for example
```lua
function()
require('someplugin').some_function()
end
```
Additionally, to not have to repeat the descriptions, there's another utility
function with its own set of functions: Utility function that takes two
attribute sets:
- `{ someKey = "some_value" }`
- `{ someKey = { description = "Some Description"; }; }`
and merges them into `{ someKey = { value = "some_value"; description = "Some Description"; }; }`
```nix
addDescriptionsToMappings = actualMappings: mappingDefinitions:
```
This function can be used in combination with the same `mkBinding` functions as
above, except they only take two arguments - `binding` and `action`, and have
different names:
- `mkSetBinding = binding: action:` - makes a basic binding, with `silent`
set to true.
- `mkSetExprBinding = binding: action:` - makes an expression binding, with
`lua`, `silent`, and `expr` set to true.
- `mkSetLuaBinding = binding: action:` - makes an expression binding, with
`lua`, and `silent` set to true.
You can read the source code of some modules to see them in action, but their
usage should look something like this:
```nix
# plugindefinition.nix
{lib, ...}: with lib; {
options.vim.plugin = {
enable = mkEnableOption "Enable plugin";
# Mappings should always be inside an attrset called mappings
mappings = {
# mkMappingOption is a helper function from lib,
# that takes a description (which will also appear in which-key),
# and a default mapping (which can be null)
toggleCurrentLine = mkMappingOption "Toggle current line comment" "gcc";
toggleCurrentBlock = mkMappingOption "Toggle current block comment" "gbc";
toggleOpLeaderLine = mkMappingOption "Toggle line comment" "gc";
toggleOpLeaderBlock = mkMappingOption "Toggle block comment" "gb";
toggleSelectedLine = mkMappingOption "Toggle selected comment" "gc";
toggleSelectedBlock = mkMappingOption "Toggle selected block" "gb";
};
};
}
```
```nix
# config.nix
{
config,
pkgs,
lib,
...
}:
with lib;
with builtins; let
cfg = config.vim.plugin;
self = import ./plugindefinition.nix {inherit lib;};
mappingDefinitions = self.options.vim.plugin;
# addDescriptionsToMappings is a helper function from lib,
# that merges mapping values and their descriptions
# into one nice attribute set
mappings = addDescriptionsToMappings cfg.mappings mappingDefinitions;
in {
config = mkIf (cfg.enable) {
# ...
vim.maps.normal = mkMerge [
# mkSetBinding is another helper function from lib,
# that actually adds the mapping with a description.
(mkSetBinding mappings.findFiles "<cmd> Telescope find_files<CR>")
(mkSetBinding mappings.liveGrep "<cmd> Telescope live_grep<CR>")
(mkSetBinding mappings.buffers "<cmd> Telescope buffers<CR>")
(mkSetBinding mappings.helpTags "<cmd> Telescope help_tags<CR>")
(mkSetBinding mappings.open "<cmd> Telescope<CR>")
(mkSetBinding mappings.gitCommits "<cmd> Telescope git_commits<CR>")
(mkSetBinding mappings.gitBufferCommits "<cmd> Telescope git_bcommits<CR>")
(mkSetBinding mappings.gitBranches "<cmd> Telescope git_branches<CR>")
(mkSetBinding mappings.gitStatus "<cmd> Telescope git_status<CR>")
(mkSetBinding mappings.gitStash "<cmd> Telescope git_stash<CR>")
(mkIf config.vim.lsp.enable (mkMerge [
(mkSetBinding mappings.lspDocumentSymbols "<cmd> Telescope lsp_document_symbols<CR>")
(mkSetBinding mappings.lspWorkspaceSymbols "<cmd> Telescope lsp_workspace_symbols<CR>")
(mkSetBinding mappings.lspReferences "<cmd> Telescope lsp_references<CR>")
(mkSetBinding mappings.lspImplementations "<cmd> Telescope lsp_implementations<CR>")
(mkSetBinding mappings.lspDefinitions "<cmd> Telescope lsp_definitions<CR>")
(mkSetBinding mappings.lspTypeDefinitions "<cmd> Telescope lsp_type_definitions<CR>")
(mkSetBinding mappings.diagnostics "<cmd> Telescope diagnostics<CR>")
]))
(
mkIf config.vim.treesitter.enable
(mkSetBinding mappings.treesitter "<cmd> Telescope treesitter<CR>")
)
];
# ...
};
}
```
::: {.note}
If you have come across a plugin that has an API that doesn't seem to easily
allow custom keybindings, don't be scared to implement a draft PR. We'll help
you get it done.
:::