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helix/configuration.html

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<ol class="chapter"><li class="chapter-item expanded "><a href="install.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="usage.html"><strong aria-hidden="true">2.</strong> Usage</a></li><li class="chapter-item expanded "><a href="configuration.html" class="active"><strong aria-hidden="true">3.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">3.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="hooks.html"><strong aria-hidden="true">3.2.</strong> Hooks</a></li></ol></li></ol> </div>
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<h1 id="configuration"><a class="header" href="#configuration">Configuration</a></h1>
<h2 id="theme"><a class="header" href="#theme">Theme</a></h2>
<p>Use a custom theme by placing a theme.toml in your config directory (i.e ~/.config/helix/theme.toml). The default theme.toml can be found <a href="https://github.com/helix-editor/helix/blob/master/theme.toml">here</a>, and user submitted themes <a href="https://github.com/helix-editor/helix/blob/master/contrib/themes">here</a>.</p>
<p>Styles in theme.toml are specified of in the form:</p>
<pre><code class="language-toml">key = { fg = &quot;#ffffff&quot;, bg = &quot;#000000&quot;, modifiers = [&quot;bold&quot;, &quot;italic&quot;] }
</code></pre>
<p>where <code>name</code> represents what you want to style, <code>fg</code> specifies the foreground color, <code>bg</code> the background color, and <code>modifiers</code> is a list of style modifiers. <code>bg</code> and <code>modifiers</code> can be omitted to defer to the defaults.</p>
<p>To specify only the foreground color:</p>
<pre><code class="language-toml">key = &quot;#ffffff&quot;
</code></pre>
<p>if the key contains a dot <code>'.'</code>, it must be quoted to prevent it being parsed as a <a href="https://toml.io/en/v1.0.0#keys">dotted key</a>.</p>
<pre><code class="language-toml">&quot;key.key&quot; = &quot;#ffffff&quot;
</code></pre>
<p>Possible modifiers:</p>
<table><thead><tr><th>Modifier</th></tr></thead><tbody>
<tr><td><code>bold</code></td></tr>
<tr><td><code>dim</code></td></tr>
<tr><td><code>italic</code></td></tr>
<tr><td><code>underlined</code></td></tr>
<tr><td><code>slow\_blink</code></td></tr>
<tr><td><code>rapid\_blink</code></td></tr>
<tr><td><code>reversed</code></td></tr>
<tr><td><code>hidden</code></td></tr>
<tr><td><code>crossed\_out</code></td></tr>
</tbody></table>
<p>Possible keys:</p>
<table><thead><tr><th>Key</th><th>Notes</th></tr></thead><tbody>
<tr><td><code>attribute</code></td><td></td></tr>
<tr><td><code>keyword</code></td><td></td></tr>
<tr><td><code>keyword.directive</code></td><td>Preprocessor directives (#if in C)</td></tr>
<tr><td><code>namespace</code></td><td></td></tr>
<tr><td><code>punctuation</code></td><td></td></tr>
<tr><td><code>punctuation.delimiter</code></td><td></td></tr>
<tr><td><code>operator</code></td><td></td></tr>
<tr><td><code>special</code></td><td></td></tr>
<tr><td><code>property</code></td><td></td></tr>
<tr><td><code>variable</code></td><td></td></tr>
<tr><td><code>variable.parameter</code></td><td></td></tr>
<tr><td><code>type</code></td><td></td></tr>
<tr><td><code>type.builtin</code></td><td></td></tr>
<tr><td><code>constructor</code></td><td></td></tr>
<tr><td><code>function</code></td><td></td></tr>
<tr><td><code>function.macro</code></td><td></td></tr>
<tr><td><code>function.builtin</code></td><td></td></tr>
<tr><td><code>comment</code></td><td></td></tr>
<tr><td><code>variable.builtin</code></td><td></td></tr>
<tr><td><code>constant</code></td><td></td></tr>
<tr><td><code>constant.builtin</code></td><td></td></tr>
<tr><td><code>string</code></td><td></td></tr>
<tr><td><code>number</code></td><td></td></tr>
<tr><td><code>escape</code></td><td>Escaped characters</td></tr>
<tr><td><code>label</code></td><td>For lifetimes</td></tr>
<tr><td><code>module</code></td><td></td></tr>
<tr><td><code>ui.background</code></td><td></td></tr>
<tr><td><code>ui.linenr</code></td><td></td></tr>
<tr><td><code>ui.statusline</code></td><td></td></tr>
<tr><td><code>ui.popup</code></td><td></td></tr>
<tr><td><code>ui.window</code></td><td></td></tr>
<tr><td><code>ui.help</code></td><td></td></tr>
<tr><td><code>ui.text</code></td><td></td></tr>
<tr><td><code>ui.text.focus</code></td><td></td></tr>
<tr><td><code>ui.menu.selected</code></td><td></td></tr>
<tr><td><code>ui.selection</code></td><td>For selections in the editing area</td></tr>
<tr><td><code>warning</code></td><td>LSP warning</td></tr>
<tr><td><code>error</code></td><td>LSP error</td></tr>
<tr><td><code>info</code></td><td>LSP info</td></tr>
<tr><td><code>hint</code></td><td>LSP hint</td></tr>
</tbody></table>
<p>These keys match <a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#theme">tree-sitter scopes</a>. We half-follow the common scopes from <a href="https://macromates.com/manual/en/language_grammars">macromates language grammars</a> with some differences.</p>
<p>For a given highlight produced, styling will be determined based on the longest matching theme key. So it's enough to provide function to highlight <code>function.macro</code> and <code>function.builtin</code> as well, but you can use more specific scopes to highlight specific cases differently.</p>
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