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*outline.txt* For NVIM v0.7.0 Last change: 2023 November 29
==============================================================================
Table of Contents *outline-table-of-contents*
- Prerequisites |outline-prerequisites|
- Installation |outline-installation|
- Setup |outline-setup|
- Configuration |outline-configuration|
- Providers |outline-providers|
- Commands |outline-commands|
- Default keymaps |outline-default-keymaps|
- Highlights |outline-highlights|
- Lua API |outline-lua-api|
- Tips |outline-tips|
- Recipes |outline-recipes|
- Limitations |outline-limitations|
- Related plugins |outline-related-plugins|
------------------------------------------------------------------------------
PREREQUISITES *outline-prerequisites*
- Neovim 0.7+
- To use modifiers on |outline-commands|, Neovim 0.8 is required.
Everything else works with Neovim 0.7.
- To use outline.nvim with LSP, a properly configured LSP client is required.
INSTALLATION *outline-installation*
- GitHub repo: `"hedyhli/outline.nvim"`
- Or SourceHut repo: `url = "https://git.sr.ht/~hedy/outline.nvim"` (an
equivalent key to `url` for your plugin manager)
Lazy.nvim example:
>lua
{
"hedyhli/outline.nvim",
config = function()
-- Example mapping to toggle outline
vim.keymap.set("n", "<leader>o", "<cmd>Outline<CR>",
{ desc = "Toggle Outline" })
require("outline").setup {
-- Your setup opts here (leave empty to use defaults)
}
end,
},
<
Lazy.nvim with lazy-loading example:
>lua
{
"hedyhli/outline.nvim",
lazy = true,
cmd = { "Outline", "OutlineOpen" },
keys = { -- Example mapping to toggle outline
{ "<leader>o", "<cmd>Outline<CR>", desc = "Toggle outline" },
},
opts = {
-- Your setup opts here
},
},
<
This allows Lazy.nvim to lazy-load the plugin on commands `Outline`,
`OutlineOpen`, and your keybindings.
SETUP *outline-setup*
Call the setup function with your configuration options.
Note that a call to `.setup()` is **required** for this plugin to work
(otherwise you might see this error: simrat39/symbols-outline.nvim#213).
>lua
require("outline").setup({})
<
|outline-skip-to-commands|
CONFIGURATION *outline-configuration*
The configuration structure has been heavily improved and refactored in this
plugin. If you’re migrating from the original symbols-outline, see #12 on
github <https://github.com/hedyhli/outline.nvim/issues/12> under "breaking
changes" section.
TERMINOLOGY ~
Check this list if you have any confusion with the terms used in the
configuration.
- **Provider**: Source of the items in the outline view. Could be LSP, CoC, etc.
- **Node**: An item in the outline view
- **Fold**: Collapse a collapsible node
- **Location**: Where in the source file a node is from
- **Preview**: Show the location of a node in code using a floating window.
Syntax highlighting is provided if treesitter is installed.
- **Jump/Peek**: Go to corresponding location in code without leaving outline window
- **Hover**: Cursor currently on the line of a node
- **Hover symbol**: Displaying a floating window to show symbol information
provided by provider.
- **Focus**: Which window the cursor is in
- **Follow**: Update hover highlight and cursor position in outline to match
position in code. Opposite of 'jump'.
|outline-skip-to-commands|
DEFAULT OPTIONS ~
Pass a table to the setup call with your configuration options.
Show defaults ~
>lua
{
outline_window = {
-- Where to open the split window: right/left
position = 'right',
-- The default split commands used are 'topleft vs' and 'botright vs'
-- depending on `position`. You can change this by providing your own
-- `split_command`.
-- `position` will not be considered if `split_command` is non-nil.
-- This should be a valid vim command used for opening the split for the
-- outline window. Eg, 'rightbelow vsplit'.
split_command = nil,
-- Percentage or integer of columns
width = 25,
-- Whether width is relative to the total width of nvim
-- When relative_width = true, this means take 25% of the total
-- screen width for outline window.
relative_width = true,
-- Auto close the outline window if goto_location is triggered and not for
-- peek_location
auto_close = false,
-- Automatically scroll to the location in code when navigating outline window.
auto_jump = false,
-- boolean or integer for milliseconds duration to apply a temporary highlight
-- when jumping. false to disable.
jump_highlight_duration = 300,
-- Whether to center the cursor line vertically in the screen when
-- jumping/focusing. Executes zz.
center_on_jump = true,
-- Vim options for the outline window
show_numbers = false,
show_relative_numbers = false,
wrap = false,
-- true/false/'focus_in_outline'/'focus_in_code'.
-- The last two means only show cursorline when the focus is in outline/code.
-- 'focus_in_outline' can be used if the outline_items.auto_set_cursor
-- operations are too distracting due to visual contrast caused by cursorline.
show_cursorline = true,
-- Enable this only if you enabled cursorline so your cursor color can
-- blend with the cursorline, in effect, as if your cursor is hidden
-- in the outline window.
-- This makes your line of cursor have the same color as if the cursor
-- wasn't focused on the outline window.
-- This feature is experimental.
hide_cursor = false,
-- Whether to auto-focus on the outline window when it is opened.
-- Set to false to *always* retain focus on your previous buffer when opening
-- outline.
-- If you enable this you can still use bangs in :Outline! or :OutlineOpen! to
-- retain focus on your code. If this is false, retaining focus will be
-- enforced for :Outline/:OutlineOpen and you will not be able to have the
-- other behaviour.
focus_on_open = true,
-- Winhighlight option for outline window.
-- See :help 'winhl'
-- To change background color to "CustomHl" for example, use "Normal:CustomHl".
winhl = '',
},
outline_items = {
-- Show extra details with the symbols (lsp dependent) as virtual next
show_symbol_details = true,
-- Show corresponding line numbers of each symbol on the left column as
-- virtual text, for quick navigation when not focused on outline.
-- Why? See this comment:
-- https://github.com/simrat39/symbols-outline.nvim/issues/212#issuecomment-1793503563
show_symbol_lineno = false,
-- Whether to highlight the currently hovered symbol and all direct parents
highlight_hovered_item = true,
-- Whether to automatically set cursor location in outline to match
-- location in code when focus is in code. If disabled you can use
-- `:OutlineFollow[!]` from any window or `<C-g>` from outline window to
-- trigger this manually.
auto_set_cursor = true,
-- Autocmd events to automatically trigger these operations.
auto_update_events = {
-- Includes both setting of cursor and highlighting of hovered item.
-- The above two options are respected.
-- This can be triggered manually through `follow_cursor` lua API,
-- :OutlineFollow command, or <C-g>.
follow = { 'CursorMoved' },
-- Re-request symbols from the provider.
-- This can be triggered manually through `refresh_outline` lua API, or
-- :OutlineRefresh command.
items = { 'InsertLeave', 'WinEnter', 'BufEnter', 'BufWinEnter', 'TabEnter', 'BufWritePost' },
},
},
-- Options for outline guides which help show tree hierarchy of symbols
guides = {
enabled = true,
markers = {
-- It is recommended for bottom and middle markers to use the same number
-- of characters to align all child nodes vertically.
bottom = '└',
middle = '├',
vertical = '│',
},
},
symbol_folding = {
-- Depth past which nodes will be folded by default. Set to false to unfold all on open.
autofold_depth = 1,
-- When to auto unfold nodes
auto_unfold = {
-- Auto unfold currently hovered symbol
hovered = true,
-- Auto fold when the root level only has this many nodes.
-- Set true for 1 node, false for 0.
only = true,
},
markers = { '', '' },
},
preview_window = {
-- Automatically open preview of code location when navigating outline window
auto_preview = false,
-- Automatically open hover_symbol when opening preview (see keymaps for
-- hover_symbol).
-- If you disable this you can still open hover_symbol using your keymap
-- below.
open_hover_on_preview = false,
width = 50, -- Percentage or integer of columns
min_width = 50, -- This is the number of columns
-- Whether width is relative to the total width of nvim.
-- When relative_width = true, this means take 50% of the total
-- screen width for preview window, ensure the result width is at least 50
-- characters wide.
relative_width = true,
-- Border option for floating preview window.
-- Options include: single/double/rounded/solid/shadow or an array of border
-- characters.
-- See :help nvim_open_win() and search for "border" option.
border = 'single',
-- winhl options for the preview window, see ':h winhl'
winhl = 'NormalFloat:',
-- Pseudo-transparency of the preview window, see ':h winblend'
winblend = 0
-- Experimental feature that let's you edit the source content live
-- in the preview window. Like VS Code's "peek editor".
live = false
},
-- These keymaps can be a string or a table for multiple keys.
-- Set to `{}` to disable. (Using 'nil' will fallback to default keys)
keymaps = {
show_help = '?',
close = {'<Esc>', 'q'},
-- Jump to symbol under cursor.
-- It can auto close the outline window when triggered, see
-- 'auto_close' option above.
goto_location = '<Cr>',
-- Jump to symbol under cursor but keep focus on outline window.
peek_location = 'o',
-- Visit location in code and close outline immediately
goto_and_close = '<S-Cr>',
-- Change cursor position of outline window to match current location in code.
-- 'Opposite' of goto/peek_location.
restore_location = '<C-g>',
-- Open LSP/provider-dependent symbol hover information
hover_symbol = '<C-space>',
-- Preview location code of the symbol under cursor
toggle_preview = 'K',
rename_symbol = 'r',
code_actions = 'a',
-- These fold actions are collapsing tree nodes, not code folding
fold = 'h',
unfold = 'l',
fold_toggle = '<Tab>',
-- Toggle folds for all nodes.
-- If at least one node is folded, this action will fold all nodes.
-- If all nodes are folded, this action will unfold all nodes.
fold_toggle_all = '<S-Tab>',
fold_all = 'W',
unfold_all = 'E',
fold_reset = 'R',
-- Move down/up by one line and peek_location immediately.
-- You can also use outline_window.auto_jump=true to do this for any
-- j/k/<down>/<up>.
down_and_jump = '<C-j>',
up_and_jump = '<C-k>',
},
providers = {
priority = { 'lsp', 'coc', 'markdown', 'norg' },
lsp = {
-- Lsp client names to ignore
blacklist_clients = {},
},
},
symbols = {
-- Filter by kinds (string) for symbols in the outline.
-- Possible kinds are the Keys in the icons table below.
-- A filter list is a string[] with an optional exclude (boolean) field.
-- The symbols.filter option takes either a filter list or ft:filterList
-- key-value pairs.
-- Put exclude=true in the string list to filter by excluding the list of
-- kinds instead.
-- Include all except String and Constant:
-- filter = { 'String', 'Constant', exclude = true }
-- Only include Package, Module, and Function:
-- filter = { 'Package', 'Module', 'Function' }
-- See more examples below.
filter = nil,
-- You can use a custom function that returns the icon for each symbol kind.
-- This function takes a kind (string) as parameter and should return an
-- icon as string.
icon_fetcher = nil,
-- 3rd party source for fetching icons. Fallback if icon_fetcher returned
-- empty string. Currently supported values: 'lspkind'
icon_source = nil,
-- The next fallback if both icon_fetcher and icon_source has failed, is
-- the custom mapping of icons specified below. The icons table is also
-- needed for specifying hl group.
icons = {
File = { icon = '󰈔', hl = 'Identifier' },
Module = { icon = '󰆧', hl = 'Include' },
Namespace = { icon = '󰅪', hl = 'Include' },
Package = { icon = '󰏗', hl = 'Include' },
Class = { icon = '𝓒', hl = 'Type' },
Method = { icon = 'ƒ', hl = 'Function' },
Property = { icon = '', hl = 'Identifier' },
Field = { icon = '󰆨', hl = 'Identifier' },
Constructor = { icon = '', hl = 'Special' },
Enum = { icon = 'ℰ', hl = 'Type' },
Interface = { icon = '󰜰', hl = 'Type' },
Function = { icon = '', hl = 'Function' },
Variable = { icon = '', hl = 'Constant' },
Constant = { icon = '', hl = 'Constant' },
String = { icon = '𝓐', hl = 'String' },
Number = { icon = '#', hl = 'Number' },
Boolean = { icon = '⊨', hl = 'Boolean' },
Array = { icon = '󰅪', hl = 'Constant' },
Object = { icon = '⦿', hl = 'Type' },
Key = { icon = '🔐', hl = 'Type' },
Null = { icon = 'NULL', hl = 'Type' },
EnumMember = { icon = '', hl = 'Identifier' },
Struct = { icon = '𝓢', hl = 'Structure' },
Event = { icon = '🗲', hl = 'Type' },
Operator = { icon = '+', hl = 'Identifier' },
TypeParameter = { icon = '𝙏', hl = 'Identifier' },
Component = { icon = '󰅴', hl = 'Function' },
Fragment = { icon = '󰅴', hl = 'Constant' },
TypeAlias = { icon = ' ', hl = 'Type' },
Parameter = { icon = ' ', hl = 'Identifier' },
StaticMethod = { icon = ' ', hl = 'Function' },
Macro = { icon = ' ', hl = 'Function' },
},
},
}
<
To find out exactly what some of the options do, please see the
|outline-recipes| section at the bottom for screen-recordings/shots.
SYMBOLS TABLE ~
**filter**
Include all symbols except kinds String and Variable:
>lua
symbols.filter = { 'String', 'Variable', exclude=true }
<
Include only Function symbols:
>lua
symbols.filter = { 'Function' }
<
Per-filetype filtering example: - For python, only include function and class -
For other file types, include all but string
>lua
symbols.filter = {
default = { 'String', exclude=true },
python = { 'Function', 'Class' },
}
<
Note how the python filter list and the default filter list is NOT merged.
Setting any filter list to `nil` or `false` means include all symbols, where a
filter list is an array of strings with an optional `exclude` field.
**icons**
The order in which the sources for icons are checked is:
1. Icon fetcher function
2. Icon source (only `lspkind` is supported for this option as of now)
3. Icons table
A fallback is always used if the previous candidate returned a falsey value.
PROVIDERS *outline-providers*
The current list of tested providers are: 1. LSP (requires a suitable LSP
server to be configured for the requested buffer) - For JSX support,
`javascript` parser for treesitter is required 1. Markdown (no external
requirements) 1. Norg (requires `norg` parser for treesitter)
External providers: - Asciidoc
<https://github.com/msr1k/outline-asciidoc-provider.nvim> (no external
requirements)
EXTERNAL PROVIDERS ~
External providers can be appended to the `providers.priority` list. Each item
in the list is appended to `"outline.providers.<item>"` to form an import path,
for use as a provider.
External providers from plugins should define the provider module at
`lua/outline/providers/<name>.lua` with these functions:
- `supports_buffer(bufnr: integer) -> boolean`
This function could check buffer filetype, existence of required modules, etc.
- `get_status() -> string[]` (optional)
Return a list of lines to be included in `:OutlineStatus` as supplementary
information when this provider is active.
See an example of this function in the LSP
<./lua/outline/providers/nvim-lsp.lua> provider.
- `request_symbols(callback: function, opts: table)`
- param `callback` is a function that receives a list of symbols and the
`opts` table.
- param `opts` can be passed to `callback` without processing
Each symbol table in the list of symbols should have these fields:
- name: string
- kind: integer
- selectionRange: table with fields `start` and `end`, each have fields
`line` and `character`, each integers
- range: table with fields `start` and `end`, each have fields `line` and
`character`, each integers
- children: list of table of symbols
- detail: (optional) string, shown for `outline_items.show_symbol_details`
The built-in markdown <./lua/outline/providers/markdown.lua> provider is a good
example of a very simple outline-provider module which parses raw buffer lines
and uses regex; the built-in norg <./lua/outline/providers/norg.lua> provider
is an example which uses treesitter.
All providers should support at least nvim 0.7. You can make use of
`_G._outline_nvim_has` with fields `[8]` and `[9]` equivalent to
`vim.fn.has('nvim-0.8) == 1` and `vim.fn.has('nvim-0.9) == 1` respectively.
If a higher nvim version is required, it is recommended to check for this
requirement in the `supports_buffer` function.
Hover symbol, code action and rename functions are defined from providers. You
can customize what these functions do if these functions are triggered when
your provider is active. See the built-in LSP
<./lua/outline/providers/nvim-lsp.lua> provider for an example.
Other functions such as goto-location may also be delegated to providers in the
future.
COMMANDS *outline-commands*
- **:Outline[!]** (✓ bang ✓ mods)
Toggle outline. With bang (`!`) the cursor focus stays in your original window
after opening the outline window. Set `focus_on_open = true` to always use this
behaviour.
You can use command modifiers `topleft`/`aboveleft`/`botright`/`belowright` on
this command to control how the outline window split is created. Other
modifiers are ignored.
Example:
>vim
" in config: position='right'
:topleft Outline " opens with 'topleft vsplit'
:belowright Outline " opens with 'belowright vsplit'
:Outline " opens with 'botright vsplit'
<
- **:OutlineOpen[!]** (✓ bang ✓ mods)
Open outline. With bang (`!`) the cursor focus stays in your original window
after opening the outline window. Set `focus_on_open = true` to always use this
behaviour.
You can use command modifiers `topleft`/`aboveleft`/`botright`/`belowright` on
this command to control how the outline window split is created. Other
modifiers are ignored.
>vim
" in config: position='left'
:aboveleft OutlineOpen " opens with 'aboveleft vsplit'
:belowright OutlineOpen " opens with 'belowright vsplit'
:OutlineOpen " opens with 'topleft vsplit'
<
- **:OutlineClose**: Close outline
- **:OutlineFocus**: Toggle focus between outline and code/source window
- **:OutlineFocusOutline**: Focus on outline
- **:OutlineFocusCode**: Focus on source window
- **:OutlineStatus**: Display provider and outline window status in a floating
window, similar to `:LspInfo`
- **:OutlineFollow[!]** (✓ bang × mods)
Go to corresponding node in outline based on cursor position in code, and focus
on the outline window.
With bang (`!`), retain focus on the code window.
This can be understood as the converse of `goto_location` (see keymaps).
`goto_location` sets cursor of code window to the position of outline window,
whereas this command sets position in outline window to the cursor position of
code window.
With bang, it can be understood as the converse of `peek_location`.
This is automatically triggered on events
`outline_items.auto_update_events.follow`.
You can also trigger this manually using the `restore_location` keymap (default
`<C-g>`) from the outline window.
- **:OutlineRefresh**
Trigger refresh of symbols from provider and update outline items.
This is automatically triggered on events
`outline_items.auto_update_events.refresh`.
DEFAULT KEYMAPS *outline-default-keymaps*
These mappings are active only for the outline window.
You can open a floating window showing the following list of keymaps using the
`?` key by default from the outline window.
Key Action
------------- ----------------------------------------------------
Esc / q Close outline
Enter Go to symbol location in code
o Go to symbol location in code without losing focus
Shift+Enter Go to symbol location in code and close outline
Ctrl+g Update outline window to focus on code location
K Toggles the current symbol preview
Ctrl+Space Hover current symbol (provider action)
r Rename symbol
a Code actions
h Fold symbol or parent symbol
Tab Toggle fold under cursor
Shift+Tab Toggle all folds
l Unfold symbol
W Fold all symbols
E Unfold all symbols
R Reset all folding
Ctrl+k Go up and peek location
Ctrl+j Go down and peek location
? Show current keymaps in a floating window
If you frequently use horizontal splits and need `<C-k/j>` to navigate them,
you may want to remap:
>lua
keymaps = {
up_and_jump = '<C-p>',
down_and_jump = '<C-n>',
}
<
Or if you never use arrow keys to move around, you can use:
>lua
keymaps = {
up_and_jump = '<up>',
down_and_jump = '<down>',
}
<
HIGHLIGHTS *outline-highlights*
OUTLINE WINDOW ~
Default:
>lua
outline_window = {
winhl = '',
},
<
Possible highlight groups for the outline window:
-----------------------------------------------------------------------
Highlight Description
------------------- ---------------------------------------------------
OutlineCurrent Current symbol under cursor
OutlineGuides Guide markers section in each line of the outline
OutlineFoldMarker Fold markers in the outline
OutlineDetails Symbol details in virtual text
OutlineLineno The Lineno column virtual text
-----------------------------------------------------------------------
You can customize any other highlight groups using `winhl`, this option is
passed directly to the `winhl` vim option unprocessed.
If any of the above highlights have not already been set before outline.setup
is called (say by a theme), the following links are used:
Highlight Link
------------------- ---------
OutlineGuides Comment
OutlineFoldMarker Normal
OutlineDetails Comment
OutlineLineno LineNr
For `OutlineCurrent`, foreground is set to String and background CursorLine.
To customize colors of the symbol icons, use the `symbols.icons` table. See
|outline-config|.
PREVIEW WINDOW ~
>lua
preview_window = {
winhl = 'NormalFloat:',
},
<
HELP WINDOWS ~
Highlight Link
--------------------------- ----------
OutlineHelpTip Comment
OutlineStatusFt Type
OutlineStatusError ErrorMsg
OutlineStatusProvider Special
OutlineKeymapHelpKey Special
OutlineKeymapHelpDisabled Comment
Help windows include: 1. the keymap help from pressing `?` in the outline
window 1. `:OutlineStatus`
OTHER HIGHLIGHT GROUPS ~
------------------------------------------------------------------------------
Highlight Description
---------------------- -------------------------------------------------------
OutlineJumpHighlight Indicating cursor position when jumping/focusing,
defaults to Visual
------------------------------------------------------------------------------
You can also use `outline_window.jump_highlight_duration` to customize in
milliseconds, how long the highlight is applied for.
LUA API *outline-lua-api*
Outline.nvim provides the following public API for use in lua.
>lua
require'outline'
<
- setup(opts)
- **toggle(opts)**
Toggle opening/closing of outline window.
If `opts.focus_outline=false`, keep focus on previous window.
- **open(opts)**
Open the outline window.
If `opts.focus_outline=false`, keep focus on previous window.
- **close()**
Close the outline window.
- **focus_toggle()**
Toggle cursor focus between code and outline window.
- **focus_outline()**
Focus cursor on the outline window.
- **focus_code()**
Focus cursor on the window which the outline is derived from.
- **is_open()**
Return whether the outline window is open.
- **show_status()**
Display provider and outline window status in a floating window.
- **has_provider()**
Returns whether a provider is available.
- **follow_cursor(opts)**
Go to corresponding node in outline based on cursor position in code, and focus
on the outline window.
With `opts.focus_outline=false`, cursor focus will remain on code window.
This is automatically called on events
`outline_items.auto_update_events.follow` from config.
- **has_focus()**
Return whether outline is open and current focus is in outline.
- **refresh()**
Re-request symbols from provider and update outline items.
This is automatically called on events
`outline_items.auto_update_events.refresh` from config.
- **get_breadcrumb(opts)**
Return a string concatenated from hovered symbols hierarchy representing code
location.
Optional opts table fields:
- depth (nil): Maximum depth of the last symbol included. First item has depth 1.
Set to 0 or nil to include all
- sep (`>`): String for separator
- **get_symbol(opts)**
Return the symbol name of the deepest hovered symbol representing code
location.
Optional opts table fields:
- depth (nil): Maximum depth of the returned symbol
- kind (nil): Symbol kind to search for (string).
TIPS *outline-tips*
- To open the outline but don’t focus on it, you can use `:Outline!` or
`:OutlineOpen!`.
This is useful in autocmds, say you have a filetype that, whenever a buffer
with that filetype is opened you want to open the outline.
- After navigating around in the outline window, you can use `<C-g>` (default
mapping for `restore_location`) to go back to the corresponding outline
location based on the code location.
- To customize the background colors, text colors, and borders, you can use
`outline_window.winhl` for the outline window or `preview_window.winhl` for the
preview floating window. See |outline-highlights|.
- To fix symbol icon related issues, there are several options. If you use
`lspkind`, you can set `symbols.icon_source = 'lspkind'` to use lspkind for
fetching icons. You can also use your own function `symbols.icon_fetcher` that
takes a string and should return an icon. Otherwise, you can edit the
`symbols.icons` table for specifying icons.
The order in which the sources of icons are checked is:
1. Icon fetcher function
2. Icon source
3. Icons table
A fallback is always used if the previous candidate returned falsey value.
You can hide an icon for a specific type by returning `""`.
Below is an example where icons are disabled for kind 'Package', and for other
icons use lspkind.
>lua
symbols = {
icon_fetcher = function(k)
if k == 'Package' then
return ""
end
return false
end,
icon_source = 'lspkind',
}
<
- You can customize the split command used for creating the outline window split
using `outline_window.split_command`, such as `"topleft vsp"`. See |windows|
- Is the outline window too slow when first opening a file? This is usually due
to the LSP not being ready when you open outline, hence we have to wait for the
LSP response before the outline can be shown. If LSP is ready generally the
outline latency is almost negligible.
RECIPES *outline-recipes*
Behaviour you may want to achieve and the combination of configuration options
to achieve it.
Code snippets in this section are to be placed in `.setup({ <HERE> })` directly
unless specified otherwise.
UNFOLD OTHERS ~
(Now a default behaviour, different to symbols-outline.nvim.)
Unfold all others except currently hovered item.
>lua
symbol_folding = {
autofold_depth = 1,
auto_unfold = {
hovered = true,
},
},
<
UNFOLD ENTIRE SYMBOL TREE BY DEFAULT ~
>lua
symbol_folding = {
autofold_depth = false,
},
<
AUTO-UNFOLD WHEN THERE’S ONLY TWO (OR ANY NUMBER OF) ROOT NODES ~
>lua
symbol_folding = {
auto_unfold = {
only = 2,
},
},
<
`auto_unfold.only = 2`:
https://github.com/hedyhli/outline.nvim/assets/50042066/035fadac-ecee-4427-9ee1-795dac215cea
`auto_unfold.only = 1`:
https://github.com/hedyhli/outline.nvim/assets/50042066/3a123b7e-ccf6-4278-9a8c-41d2e1865d83
In words "auto unfold nodes when there is only 2 nodes shown in the outline."
For `auto_unfold.only = true`: "auto unfold nodes when the root node is the
only node left visible in the outline."
AUTO-JUMP ~
Use outline window as a quick-jump window
>lua
preview_window = {
auto_preview = true,
},
<
https://github.com/hedyhli/outline.nvim/assets/50042066/a473d791-d1b9-48e9-917f-b816b564a645
Alternatively, if you want to automatically navigate to the corresponding code
location directly and not use the preview window:
>lua
outline_window = {
auto_jump = true,
},
<
https://github.com/hedyhli/outline.nvim/assets/50042066/3d06e342-97ac-400c-8598-97a9235de66c
Or, you can use keys `<C-j>` and `<C-k>` to achieve the same effect, whilst not
having `auto_jump` on by default.
SYMBOL DETAILS ~
Hide the extra details after each symbol name
>lua
outline_items = {
show_symbol_details = false,
},
<
You can customize its highlight group by setting `OutlineDetails` in
`outline_window.winhl`.
LINE NUMBERS ~
Show line numbers next to each symbol to jump to that symbol quickly
>lua
outline_items = {
show_symbol_lineno = true,
},
<
The default highlight group for the line numbers is `LineNr`, you can customize
it using `outline_window.winhl`: please see |outline-highlights|.
BLEND CURSOR WITH CURSORLINE ~
Hide the cursor within cursorline. This setting changes the cursor color to be
that of `Cursorline` when focus is in outline window. As of now `guicursor` is
a global option, so outline.nvim has to set and reset responsibly hence this
feature may be unstable. You can inspect
`require('outline').state.original_cursor` and set `guicursor` accordingly,
though you should almost never need to do this.
>lua
outline_window = {
show_cursorline = true,
hide_cursor = true,
}
<
This will be how the outline window looks like when focused:
Some may find this unhelpful, but one may argue that elements in each row of
the outline becomes more readable this way, hence this is an option.
CUSTOM ICONS ~
You can write your own function for fetching icons. Here is one such example
that simply returns in plain text, the first letter of the given kind.
>lua
symbols = {
icon_fetcher = function(kind) return kind:sub(1,1) end
}
<
The fetcher function, if provided, is checked first before using `icon_source`
and `icons` as fallback.
DISABLE ICONS ~
Disable all icons:
>lua
symbols = {
icon_fetcher = function(_) return "" end,
}
<
Disable icons for specific kinds, and for others use lspkind:
>lua
symbols = {
icon_fetcher = function(k)
if k == 'String' then
return ""
end
return false
end,
icon_source = 'lspkind',
}
<
LIVE, EDITABLE PREVIEWS ~
Press `K` to open the preview, press `K` again to focus on the preview window
to make any quick edits, similar to VS Code’s reference window "peek editor".
Then use `:q` to close the window, and continue browsing the outline.
>lua
preview_window = {
live = true,
}
<
Note that this feature is experimental and may be unstable.
https://github.com/hedyhli/outline.nvim/assets/50042066/183fc5f9-b369-41e2-a831-a4185704d76d
Auto-preview with the feature is also supported, set `auto_preview = true` and
press `K` to focus on the auto-opened preview window. `:q` to quit the window.
LIMITATIONS *outline-limitations*
PREVIEW WINDOW ~
Sometimes the preview window could be slow in loading. This could be due to the
code buffer being large. As of now there are no good solutions in circumventing
this problem — currently the entire code buffer is read, and then put into
the preview buffer. If only the required portion to preview is read and set
instead, there would be highlighting issues (say the calculated starting line
was within a markdown code block, so what was previously not supposed to be
code is now highlighted as code).
If this poses a problem for you, you should try out the |outline-live-preview|
feature, uses the code buffer directly for displaying the preview.
MANY OUTLINES ~
Outline.nvim does not support multiple outline windows in the same tabpage as
of now However, this feature is planned
<https://github.com/hedyhli/outline.nvim/issues/26>, and you can use a single
outline that auto-updates on buffer switches.
That said, per-tabpage outline is supported.
RELATED PLUGINS *outline-related-plugins*
- **Aerial.nvim** <https://github.com/stevearc/aerial.nvim>
The most obvious plugin alternative to Outline.nvim would be Aerial. It
provides an outline window with a lot of features that outline.nvim does not
have (but might add in the future). That said, outline.nvim also has features
that Aerial does not support. I do not find it productive to be listing out the
exact details of which, as a table here, since both plugins are in active
development and the table would get out of date quickly; Instead, I have listed
a few example use-cases where you may want to use Aerial, and others
Outline.nvim.
Aerial does a great job at supercharging vim’s built-in outline (`gO`). It
supports treesitter and manpages which Outline.nvim does not provide
|outline-by-default|. (Note that Aerial also supports Norg through treesitter
like Outline.nvim, but as of writing it does not support JSX like Outline.nvim
does.)
- If you wish to prioritize treesitter as the provider ("backend" in Aerial’s
terms) for your symbols, you should use Aerial. This lets you have symbols
for languages that you might not want to set up an LSP for, which is quite
useful. Treesitter support is a planned feature in Outline.nvim but might
not arrive very soon.
- Aerial.nvim supports only Neovim 0.8 and above for the bleeding-edge
features, as far as I know. You should use Outline.nvim (or the
alternatives below) if you use Neovim 0.7 and wish to have equal support.
- At the moment, integrations such as Telescope and statuslines in Outline.nvim
has not been very well implemented yet, though they are planned features. If you
wish to use this, you should use Aerial.
- Outline.nvim supports both inclusive and exclusive symbol filtering.
In addition to these, Aerial also supports a `AerialNav` window which gives you
a miller column view of symbol hierarchy similar to nvim-navbuddy
<https://github.com/SmiteshP/nvim-navbuddy>. This feature might never be
supported in Outline.nvim because I personally feel that it is out of scope of
a "outline window" plugin, and to keep the codebase simple. If you don’t want
to install a second plugin for this feature, you should use Aerial.
- **nvim-navic** <https://github.com/SmiteshP/nvim-navic>
nvim-navic gives you fully customizable breadcrumb section for you
winbar/statusline. However, as far as I am aware it only supports LSP. To have
other providers built-in you can try Aerial, or dropbar.nvim
<https://github.com/Bekaboo/dropbar.nvim>.
- **nvim-navbuddy** <https://github.com/SmiteshP/nvim-navbuddy>
Miller columns popup for LSP navigation. Again as far as I know only LSP is
supported.
- **dropbar.nvim** <https://github.com/Bekaboo/dropbar.nvim>
Clickable breadcrumbs section with support for many sources in addition to LSP.
However, it requires Neovim nightly as of writing.
- **lspsaga** <https://github.com/nvimdev/lspsaga.nvim>
I’ve heard that this plugin gives you many features previously described all
in one plugin. However I have not used this myself so I cannot comment on it
more, other than it might only support LSP.
- **glance.nvim** <https://github.com/DNLHC/glance.nvim>
Extremely interesting plugin that gives you a floating window for navigation
and quick-edits of locations provided by LSP. However it solves a different
problem to Outline.nvim: navigating references and definitions.
- **navigator.lua** <https://github.com/ray-x/navigator.lua>
Unfortunately I have not used this myself, but it looks pretty good. It might
only support LSP.
- **Treesitter (inspect/edit)**
The built-in treesitter module has a `:InspectTree` feature that can follow
your cursor around and let you jump to locations by navigating the tree.
Compared to Outline.nvim it may not be as customizable, but it uses treesitter
and can highlight entire ranges of symbols.
If you’ve read this much, maybe you should subscribe to the breaking changes
announcements <https://github.com/hedyhli/outline.nvim/issues/10> to get
updates when there are breaking changes. It’s low-volume, I promise ;)
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