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295 lines
17 KiB
HTML
295 lines
17 KiB
HTML
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<head>
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<script type="text/javascript">
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var theme;
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try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
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if (theme === null || theme === undefined) { theme = default_theme; }
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var html = document.querySelector('html');
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html.classList.remove('no-js')
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html.classList.remove('light')
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html.classList.add(theme);
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sidebar = sidebar || 'visible';
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}
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html.classList.add("sidebar-" + sidebar);
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</script>
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<nav id="sidebar" class="sidebar" aria-label="Table of contents">
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<div class="sidebar-scrollbox">
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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="from-vim.html"><strong aria-hidden="true">3.</strong> Migrating from Vim</a></li><li class="chapter-item expanded "><a href="configuration.html"><strong aria-hidden="true">4.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="themes.html" class="active"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="keymap.html"><strong aria-hidden="true">4.2.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="remapping.html"><strong aria-hidden="true">4.3.</strong> Key Remapping</a></li><li class="chapter-item expanded "><a href="hooks.html"><strong aria-hidden="true">4.4.</strong> Hooks</a></li></ol></li></ol> </div>
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<li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
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</ul>
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<button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
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<i class="fa fa-search"></i>
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<h1 class="menu-title"></h1>
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<div class="right-buttons">
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<input type="search" name="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
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<script type="text/javascript">
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document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
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document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
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</script>
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<div id="content" class="content">
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<main>
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<h1 id="themes"><a class="header" href="#themes">Themes</a></h1>
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<p>First you'll need to place selected themes in your <code>themes</code> directory (i.e <code>~/.config/helix/themes</code>), the directory might have to be created beforehand.</p>
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<p>To use a custom theme add <code>theme = <name></code> to your <a href="./configuration.html"><code>config.toml</code></a> or override it during runtime using <code>:theme <name></code>.</p>
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<p>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/runtime/themes">here</a>. </p>
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<h2 id="creating-a-theme"><a class="header" href="#creating-a-theme">Creating a theme</a></h2>
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<p>First create a file with the name of your theme as file name (i.e <code>mytheme.toml</code>) and place it in your <code>themes</code> directory (i.e <code>~/.config/helix/themes</code>).</p>
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<p>Each line in the theme file is specified as below:</p>
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<pre><code class="language-toml">key = { fg = "#ffffff", bg = "#000000", modifiers = ["bold", "italic"] }
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</code></pre>
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<p>where <code>key</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>
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<p>To specify only the foreground color:</p>
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<pre><code class="language-toml">key = "#ffffff"
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</code></pre>
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<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>
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<pre><code class="language-toml">"key.key" = "#ffffff"
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</code></pre>
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<p>Possible modifiers:</p>
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<table><thead><tr><th>Modifier</th></tr></thead><tbody>
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<tr><td><code>bold</code></td></tr>
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<tr><td><code>dim</code></td></tr>
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<tr><td><code>italic</code></td></tr>
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<tr><td><code>underlined</code></td></tr>
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<tr><td><code>slow\_blink</code></td></tr>
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<tr><td><code>rapid\_blink</code></td></tr>
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<tr><td><code>reversed</code></td></tr>
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<tr><td><code>hidden</code></td></tr>
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<tr><td><code>crossed\_out</code></td></tr>
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</tbody></table>
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<p>Possible keys:</p>
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<table><thead><tr><th>Key</th><th>Notes</th></tr></thead><tbody>
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<tr><td><code>attribute</code></td><td></td></tr>
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<tr><td><code>keyword</code></td><td></td></tr>
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<tr><td><code>keyword.directive</code></td><td>Preprocessor directives (#if in C)</td></tr>
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<tr><td><code>keyword.control</code></td><td>Control flow</td></tr>
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<tr><td><code>namespace</code></td><td></td></tr>
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<tr><td><code>punctuation</code></td><td></td></tr>
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<tr><td><code>punctuation.delimiter</code></td><td></td></tr>
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<tr><td><code>operator</code></td><td></td></tr>
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<tr><td><code>special</code></td><td></td></tr>
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<tr><td><code>property</code></td><td></td></tr>
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<tr><td><code>variable</code></td><td></td></tr>
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<tr><td><code>variable.parameter</code></td><td></td></tr>
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<tr><td><code>type</code></td><td></td></tr>
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<tr><td><code>type.builtin</code></td><td></td></tr>
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<tr><td><code>type.enum.variant</code></td><td>Enum variants</td></tr>
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<tr><td><code>constructor</code></td><td></td></tr>
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<tr><td><code>function</code></td><td></td></tr>
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<tr><td><code>function.macro</code></td><td></td></tr>
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<tr><td><code>function.builtin</code></td><td></td></tr>
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<tr><td><code>comment</code></td><td></td></tr>
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<tr><td><code>variable.builtin</code></td><td></td></tr>
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<tr><td><code>constant</code></td><td></td></tr>
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<tr><td><code>constant.builtin</code></td><td></td></tr>
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<tr><td><code>string</code></td><td></td></tr>
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<tr><td><code>number</code></td><td></td></tr>
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<tr><td><code>escape</code></td><td>Escaped characters</td></tr>
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<tr><td><code>label</code></td><td>For lifetimes</td></tr>
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<tr><td><code>module</code></td><td></td></tr>
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<tr><td><code>ui.background</code></td><td></td></tr>
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<tr><td><code>ui.cursor</code></td><td></td></tr>
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<tr><td><code>ui.cursor.insert</code></td><td></td></tr>
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<tr><td><code>ui.cursor.select</code></td><td></td></tr>
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<tr><td><code>ui.cursor.match</code></td><td>Matching bracket etc.</td></tr>
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<tr><td><code>ui.cursor.primary</code></td><td>Cursor with primary selection</td></tr>
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<tr><td><code>ui.linenr</code></td><td></td></tr>
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<tr><td><code>ui.linenr.selected</code></td><td></td></tr>
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<tr><td><code>ui.statusline</code></td><td></td></tr>
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<tr><td><code>ui.statusline.inactive</code></td><td></td></tr>
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<tr><td><code>ui.popup</code></td><td></td></tr>
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<tr><td><code>ui.window</code></td><td></td></tr>
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<tr><td><code>ui.help</code></td><td></td></tr>
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<tr><td><code>ui.text</code></td><td></td></tr>
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<tr><td><code>ui.text.focus</code></td><td></td></tr>
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<tr><td><code>ui.menu.selected</code></td><td></td></tr>
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<tr><td><code>ui.selection</code></td><td>For selections in the editing area</td></tr>
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<tr><td><code>ui.selection.primary</code></td><td></td></tr>
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<tr><td><code>warning</code></td><td>LSP warning</td></tr>
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<tr><td><code>error</code></td><td>LSP error</td></tr>
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<tr><td><code>info</code></td><td>LSP info</td></tr>
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<tr><td><code>hint</code></td><td>LSP hint</td></tr>
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</tbody></table>
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<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>
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<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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<h2 id="color-palettes"><a class="header" href="#color-palettes">Color palettes</a></h2>
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<p>You can define a palette of named colors, and refer to them from the
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configuration values in your theme. To do this, add a table called
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<code>palette</code> to your theme file:</p>
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<pre><code class="language-toml">ui.background = "white"
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ui.text = "black"
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[palette]
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white = "#ffffff"
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black = "#000000"
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</code></pre>
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<p>Remember that the <code>[palette]</code> table includes all keys after its header,
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so you should define the palette after normal theme options.</p>
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</main>
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