1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
# Themes
To use a theme add `theme = "<name>"` to your [`config.toml`](./configuration.md) at the very top of the file before the first section or select it during runtime using `:theme <name>`.
## Creating a theme
Create a file with the name of your theme as file name (i.e `mytheme.toml`) and place it in your `themes` directory (i.e `~/.config/helix/themes`). The directory might have to be created beforehand.
The names "default" and "base16_default" are reserved for the builtin themes and cannot be overridden by user defined themes.
The default theme.toml can be found [here](https://github.com/helix-editor/helix/blob/master/theme.toml), and user submitted themes [here](https://github.com/helix-editor/helix/blob/master/runtime/themes).
Each line in the theme file is specified as below:
```toml
key = { fg = "#ffffff", bg = "#000000", underline-color = "#ff0000", underline-style = "curl", modifiers = ["bold", "italic"] }
```
where `key` represents what you want to style, `fg` specifies the foreground color, `bg` the background color, `underline_style` the underline style, `underline_color` the underline color (only meaningful if an underline style is enabled), and `modifiers` is a list of style modifiers. `bg`, `underline` and `modifiers` can be omitted to defer to the defaults.
To specify only the foreground color:
```toml
key = "#ffffff"
```
if the key contains a dot `'.'`, it must be quoted to prevent it being parsed as a [dotted key](https://toml.io/en/v1.0.0#keys).
```toml
"key.key" = "#ffffff"
```
### Color palettes
It's recommended define a palette of named colors, and refer to them from the
configuration values in your theme. To do this, add a table called
`palette` to your theme file:
```toml
"ui.background" = "white"
"ui.text" = "black"
[palette]
white = "#ffffff"
black = "#000000"
```
Remember that the `[palette]` table includes all keys after its header,
so you should define the palette after normal theme options.
The default palette uses the terminal's default 16 colors, and the colors names
are listed below. The `[palette]` section in the config file takes precedence
over it and is merged into the default palette.
| Color Name |
| --- |
| `black` |
| `red` |
| `green` |
| `yellow` |
| `blue` |
| `magenta` |
| `cyan` |
| `gray` |
| `light-red` |
| `light-green` |
| `light-yellow` |
| `light-blue` |
| `light-magenta` |
| `light-cyan` |
| `light-gray` |
| `white` |
### Modifiers
The following values may be used as modifiers.
Less common modifiers might not be supported by your terminal emulator.
| Modifier |
| --- |
| `bold` |
| `dim` |
| `italic` |
| `underlined` |
| `slow_blink` |
| `rapid_blink` |
| `reversed` |
| `hidden` |
| `crossed_out` |
### Underline Style
One of the following values may be used as an `underline-style`.
Some styles might not be supported by your terminal emulator.
| Modifier |
| --- |
| `line` |
| `curl` |
| `dashed` |
| `dot` |
| `double_line` |
### Scopes
The following is a list of scopes available to use for styling.
#### Syntax highlighting
These keys match [tree-sitter scopes](https://tree-sitter.github.io/tree-sitter/syntax-highlighting#theme).
For a given highlight produced, styling will be determined based on the longest matching theme key. For example, the highlight `function.builtin.static` would match the key `function.builtin` rather than `function`.
We use a similar set of scopes as
[SublimeText](https://www.sublimetext.com/docs/scope_naming.html). See also
[TextMate](https://macromates.com/manual/en/language_grammars) scopes.
- `attribute` - Class attributes, html tag attributes
- `type` - Types
- `builtin` - Primitive types provided by the language (`int`, `usize`)
- `constructor`
- `constant` (TODO: constant.other.placeholder for %v)
- `builtin` Special constants provided by the language (`true`, `false`, `nil` etc)
- `boolean`
- `character`
- `escape`
- `numeric` (numbers)
- `integer`
- `float`
- `string` (TODO: string.quoted.{single, double}, string.raw/.unquoted)?
- `regexp` - Regular expressions
- `special`
- `path`
- `url`
- `symbol` - Erlang/Elixir atoms, Ruby symbols, Clojure keywords
- `comment` - Code comments
- `line` - Single line comments (`//`)
- `block` - Block comments (e.g. (`/* */`)
- `documentation` - Documentation comments (e.g. `///` in Rust)
- `variable` - Variables
- `builtin` - Reserved language variables (`self`, `this`, `super`, etc)
- `parameter` - Function parameters
- `other`
- `member` - Fields of composite data types (e.g. structs, unions)
- `label`
- `punctuation`
- `delimiter` - Commas, colons
- `bracket` - Parentheses, angle brackets, etc.
- `special` - String interpolation brackets.
- `keyword`
- `control`
- `conditional` - `if`, `else`
- `repeat` - `for`, `while`, `loop`
- `import` - `import`, `export`
- `return`
- `exception`
- `operator` - `or`, `in`
- `directive` - Preprocessor directives (`#if` in C)
- `function` - `fn`, `func`
- `storage` - Keywords describing how things are stored
- `type` - The type of something, `class`, `function`, `var`, `let`, etc.
- `modifier` - Storage modifiers like `static`, `mut`, `const`, `ref`, etc.
- `operator` - `||`, `+=`, `>`
- `function`
- `builtin`
- `method`
- `macro`
- `special` (preprocessor in C)
- `tag` - Tags (e.g. `<body>` in HTML)
- `namespace`
- `markup`
- `heading`
- `marker`
- `1`, `2`, `3`, `4`, `5`, `6` - heading text for h1 through h6
- `list`
- `unnumbered`
- `numbered`
- `bold`
- `italic`
- `link`
- `url` - urls pointed to by links
- `label` - non-url link references
- `text` - url and image descriptions in links
- `quote`
- `raw`
- `inline`
- `block`
- `diff` - version control changes
- `plus` - additions
- `minus` - deletions
- `delta` - modifications
- `moved` - renamed or moved files/changes
#### Interface
These scopes are used for theming the editor interface.
- `markup`
- `normal`
- `completion` - for completion doc popup ui
- `hover` - for hover popup ui
- `heading`
- `completion` - for completion doc popup ui
- `hover` - for hover popup ui
- `raw`
- `inline`
- `completion` - for completion doc popup ui
- `hover` - for hover popup ui
| Key | Notes |
| --- | --- |
| `ui.background` | |
| `ui.background.separator` | Picker separator below input line |
| `ui.cursor` | |
| `ui.cursor.insert` | |
| `ui.cursor.select` | |
| `ui.cursor.match` | Matching bracket etc. |
| `ui.cursor.primary` | Cursor with primary selection |
| `ui.linenr` | Line numbers |
| `ui.linenr.selected` | Line number for the line the cursor is on |
| `ui.statusline` | Statusline |
| `ui.statusline.inactive` | Statusline (unfocused document) |
| `ui.statusline.normal` | Statusline mode during normal mode ([only if `editor.color-modes` is enabled][editor-section]) |
| `ui.statusline.insert` | Statusline mode during insert mode ([only if `editor.color-modes` is enabled][editor-section]) |
| `ui.statusline.select` | Statusline mode during select mode ([only if `editor.color-modes` is enabled][editor-section]) |
| `ui.statusline.separator` | Separator character in statusline |
| `ui.popup` | Documentation popups (e.g space-k) |
| `ui.popup.info` | Prompt for multiple key options |
| `ui.window` | Border lines separating splits |
| `ui.help` | Description box for commands |
| `ui.text` | Command prompts, popup text, etc. |
| `ui.text.focus` | |
| `ui.text.info` | The key: command text in `ui.popup.info` boxes |
| `ui.virtual.ruler` | Ruler columns (see the [`editor.rulers` config][editor-section])|
| `ui.virtual.whitespace` | Visible white-space characters |
| `ui.virtual.indent-guide` | Vertical indent width guides |
| `ui.menu` | Code and command completion menus |
| `ui.menu.selected` | Selected autocomplete item |
| `ui.menu.scroll` | `fg` sets thumb color, `bg` sets track color of scrollbar |
| `ui.selection` | For selections in the editing area |
| `ui.selection.primary` | |
| `ui.cursorline.primary` | The line of the primary cursor |
| `ui.cursorline.secondary` | The lines of any other cursors |
| `warning` | Diagnostics warning (gutter) |
| `error` | Diagnostics error (gutter) |
| `info` | Diagnostics info (gutter) |
| `hint` | Diagnostics hint (gutter) |
| `diagnostic` | Diagnostics fallback style (editing area) |
| `diagnostic.hint` | Diagnostics hint (editing area) |
| `diagnostic.info` | Diagnostics info (editing area) |
| `diagnostic.warning` | Diagnostics warning (editing area) |
| `diagnostic.error` | Diagnostics error (editing area) |
You can check compliance to spec with
```shell
cargo xtask themelint onedark # replace onedark with <name>
```
[editor-section]: ./configuration.md#editor-section
|
