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| author | omentic | 2024-05-01 23:55:51 +0000 |
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| committer | omentic | 2024-05-01 23:55:51 +0000 |
| commit | 315799cd43bf365f382cb6e4ba24d3432861f366 (patch) | |
| tree | 732f056b43a7efbf5b2a75fda060a4cd5b87df66 /master/guides/rainbow_bracket_queries.html | |
| parent | 7b6a399a1dfd55c1a993730fa6bbc2e42c74bb6d (diff) | |
deploy: cd15f3d346196db5c0c7623b6c7cafcf350119ad
Diffstat (limited to 'master/guides/rainbow_bracket_queries.html')
| -rw-r--r-- | master/guides/rainbow_bracket_queries.html | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/master/guides/rainbow_bracket_queries.html b/master/guides/rainbow_bracket_queries.html deleted file mode 100644 index c64d737c..00000000 --- a/master/guides/rainbow_bracket_queries.html +++ /dev/null @@ -1,323 +0,0 @@ -<!DOCTYPE HTML> -<html lang="en" class="colibri" dir="ltr"> - <head> - <!-- Book generated using mdBook --> - <meta charset="UTF-8"> - <title>Adding rainbow bracket queries</title> - - - <!-- Custom HTML head --> - - <meta name="description" content=""> - <meta name="viewport" content="width=device-width, initial-scale=1"> - <meta name="theme-color" content="#ffffff"> - - <link rel="icon" href="../favicon.svg"> - <link rel="shortcut icon" href="../favicon.png"> - <link rel="stylesheet" href="../css/variables.css"> - <link rel="stylesheet" href="../css/general.css"> - <link rel="stylesheet" href="../css/chrome.css"> - <link rel="stylesheet" href="../css/print.css" media="print"> - - <!-- Fonts --> - <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css"> - <link rel="stylesheet" href="../fonts/fonts.css"> - - <!-- Highlight.js Stylesheets --> - <link rel="stylesheet" href="../highlight.css"> - <link rel="stylesheet" href="../tomorrow-night.css"> - <link rel="stylesheet" href="../ayu-highlight.css"> - - <!-- Custom theme stylesheets --> - <link rel="stylesheet" href="../custom.css"> - - </head> - <body class="sidebar-visible no-js"> - <div id="body-container"> - <!-- Provide site root to javascript --> - <script> - var path_to_root = "../"; - var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "colibri" : "colibri"; - </script> - - <!-- Work around some values being stored in localStorage wrapped in quotes --> - <script> - try { - var theme = localStorage.getItem('mdbook-theme'); - var sidebar = localStorage.getItem('mdbook-sidebar'); - - if (theme.startsWith('"') && theme.endsWith('"')) { - localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1)); - } - - if (sidebar.startsWith('"') && sidebar.endsWith('"')) { - localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1)); - } - } catch (e) { } - </script> - - <!-- Set the theme before any content is loaded, prevents flash --> - <script> - var theme; - try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { } - if (theme === null || theme === undefined) { theme = default_theme; } - var html = document.querySelector('html'); - html.classList.remove('colibri') - html.classList.add(theme); - var body = document.querySelector('body'); - body.classList.remove('no-js') - body.classList.add('js'); - </script> - - <input type="checkbox" id="sidebar-toggle-anchor" class="hidden"> - - <!-- Hide / unhide sidebar before it is displayed --> - <script> - var body = document.querySelector('body'); - var sidebar = null; - var sidebar_toggle = document.getElementById("sidebar-toggle-anchor"); - if (document.body.clientWidth >= 1080) { - try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { } - sidebar = sidebar || 'visible'; - } else { - sidebar = 'hidden'; - } - sidebar_toggle.checked = sidebar === 'visible'; - body.classList.remove('sidebar-visible'); - body.classList.add("sidebar-" + sidebar); - </script> - - <nav id="sidebar" class="sidebar" aria-label="Table of contents"> - <div class="sidebar-scrollbox"> - <ol class="chapter"><li class="chapter-item expanded affix "><a href="../title-page.html">Helix</a></li><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><ol class="section"><li class="chapter-item expanded "><a href="../keymap.html"><strong aria-hidden="true">2.1.</strong> Keymap</a></li><li class="chapter-item expanded "><a href="../commands.html"><strong aria-hidden="true">2.2.</strong> Commands</a></li><li class="chapter-item expanded "><a href="../lang-support.html"><strong aria-hidden="true">2.3.</strong> Language support</a></li></ol></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"><strong aria-hidden="true">4.1.</strong> Themes</a></li><li class="chapter-item expanded "><a href="../remapping.html"><strong aria-hidden="true">4.2.</strong> Key remapping</a></li><li class="chapter-item expanded "><a href="../languages.html"><strong aria-hidden="true">4.3.</strong> Languages</a></li></ol></li><li class="chapter-item expanded "><a href="../guides/index.html"><strong aria-hidden="true">5.</strong> Guides</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../guides/adding_languages.html"><strong aria-hidden="true">5.1.</strong> Adding languages</a></li><li class="chapter-item expanded "><a href="../guides/textobject.html"><strong aria-hidden="true">5.2.</strong> Adding textobject queries</a></li><li class="chapter-item expanded "><a href="../guides/indent.html"><strong aria-hidden="true">5.3.</strong> Adding indent queries</a></li><li class="chapter-item expanded "><a href="../guides/injection.html"><strong aria-hidden="true">5.4.</strong> Adding injection queries</a></li><li class="chapter-item expanded "><a href="../guides/rainbow_bracket_queries.html" class="active"><strong aria-hidden="true">5.5.</strong> Adding rainbow bracket queries</a></li></ol></li></ol> - </div> - <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> - </nav> - - <!-- Track and set sidebar scroll position --> - <script> - var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox'); 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(Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> - <i class="fa fa-search"></i> - </button> - </div> - - <h1 class="menu-title"></h1> - - <div class="right-buttons"> - <a href="../print.html" title="Print this book" aria-label="Print this book"> - <i id="print-button" class="fa fa-print"></i> - </a> - <a href="https://github.com/helix-editor/helix" title="Git repository" aria-label="Git repository"> - <i id="git-repository-button" class="fa fa-github"></i> - </a> - <a href="https://github.com/helix-editor/helix/edit/master/book/src/guides/rainbow_bracket_queries.md" title="Suggest an edit" aria-label="Suggest an edit"> - <i id="git-edit-button" class="fa fa-edit"></i> - </a> - - </div> - </div> - - <div id="search-wrapper" class="hidden"> - <form id="searchbar-outer" class="searchbar-outer"> - <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> - </form> - <div id="searchresults-outer" class="searchresults-outer hidden"> - <div id="searchresults-header" class="searchresults-header"></div> - <ul id="searchresults"> - </ul> - </div> - </div> - - <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> - <script> - document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); - document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); - Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { - link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); - }); - </script> - - <div id="content" class="content"> - <main> - <h1 id="adding-rainbow-bracket-queries"><a class="header" href="#adding-rainbow-bracket-queries">Adding Rainbow Bracket Queries</a></h1> -<p>Helix uses <code>rainbows.scm</code> tree-sitter query files to provide rainbow bracket -functionality.</p> -<p>Tree-sitter queries are documented in the tree-sitter online documentation. -If you're writing queries for the first time, be sure to check out the section -on <a href="https://tree-sitter.github.io/tree-sitter/syntax-highlighting#highlights">syntax highlighting queries</a> and on <a href="https://tree-sitter.github.io/tree-sitter/using-parsers#pattern-matching-with-queries">query syntax</a>.</p> -<p>Rainbow queries have two captures: <code>@rainbow.scope</code> and <code>@rainbow.bracket</code>. -<code>@rainbow.scope</code> should capture any node that increases the nesting level -while <code>@rainbow.bracket</code> should capture any bracket nodes. Put another way: -<code>@rainbow.scope</code> switches to the next rainbow color for all nodes in the tree -under it while <code>@rainbow.bracket</code> paints captured nodes with the current -rainbow color.</p> -<p>For an example, let's add rainbow queries for the tree-sitter query (TSQ) -language itself. These queries will go into a -<code>runtime/queries/tsq/rainbows.scm</code> file in the repository root.</p> -<p>First we'll add the <code>@rainbow.bracket</code> captures. TSQ only has parentheses and -square brackets:</p> -<pre><code class="language-tsq">["(" ")" "[" "]"] @rainbow.bracket -</code></pre> -<p>The ordering of the nodes within the alternation (square brackets) is not -taken into consideration.</p> -<blockquote> -<p>Note: Why are these nodes quoted? Most syntax highlights capture text -surrounded by parentheses. These are <em>named nodes</em> and correspond to the -names of rules in the grammar. Brackets are usually written in tree-sitter -grammars as literal strings, for example:</p> -<pre><code class="language-js">{ - // ... - arguments: seq("(", repeat($.argument), ")"), - // ... -} -</code></pre> -<p>Nodes written as literal strings in tree-sitter grammars may be captured -in queries with those same literal strings.</p> -</blockquote> -<p>Then we'll add <code>@rainbow.scope</code> captures. The easiest way to do this is to -view the <code>grammar.js</code> file in the tree-sitter grammar's repository. For TSQ, -that file is <a href="https://github.com/the-mikedavis/tree-sitter-tsq/blob/48b5e9f82ae0a4727201626f33a17f69f8e0ff86/grammar.js">here</a>. As we scroll down the <code>grammar.js</code>, we -see that the <code>(alternation)</code>, (L36) <code>(group)</code> (L57), <code>(named_node)</code> (L59), -<code>(predicate)</code> (L87) and <code>(wildcard_node)</code> (L97) nodes all contain literal -parentheses or square brackets in their definitions. These nodes are all -direct parents of brackets and happen to also be the nodes we want to change -to the next rainbow color, so we capture them as <code>@rainbow.scope</code>.</p> -<pre><code class="language-tsq">[ - (group) - (named_node) - (wildcard_node) - (predicate) - (alternation) -] @rainbow.scope -</code></pre> -<p>This strategy works as a rule of thumb for most programming and configuration -languages. Markup languages can be trickier and may take additional -experimentation to find the correct nodes to use for scopes and brackets.</p> -<p>The <code>:tree-sitter-subtree</code> command shows the syntax tree under the primary -selection in S-expression format and can be a useful tool for determining how -to write a query.</p> -<h3 id="properties"><a class="header" href="#properties">Properties</a></h3> -<p>The <code>rainbow.include-children</code> property may be applied to <code>@rainbow.scope</code> -captures. By default, all <code>@rainbow.bracket</code> captures must be direct descendant -of a node captured with <code>@rainbow.scope</code> in a syntax tree in order to be -highlighted. The <code>rainbow.include-children</code> property disables that check and -allows <code>@rainbow.bracket</code> captures to be highlighted if they are direct or -indirect descendants of some node captured with <code>@rainbow.scope</code>.</p> -<p>For example, this property is used in the HTML rainbow queries.</p> -<p>For a document like <code><a>link</a></code>, the syntax tree is:</p> -<pre><code class="language-tsq">(element ; <a>link</a> - (start_tag ; <a> - (tag_name)) ; a - (text) ; link - (end_tag ; </a> - (tag_name))) ; a -</code></pre> -<p>If we want to highlight the <code><</code>, <code>></code> and <code></</code> nodes with rainbow colors, we -capture them as <code>@rainbow.bracket</code>:</p> -<pre><code class="language-tsq">["<" ">" "</"] @rainbow.bracket -</code></pre> -<p>And we capture <code>(element)</code> as <code>@rainbow.scope</code> because <code>(element)</code> nodes nest -within each other: they increment the nesting level and switch to the next -color in the rainbow.</p> -<pre><code class="language-tsq">(element) @rainbow.scope -</code></pre> -<p>But this combination of <code>@rainbow.scope</code> and <code>@rainbow.bracket</code> will not -highlight any nodes. <code><</code>, <code>></code> and <code></</code> are children of the <code>(start_tag)</code> and -<code>(end_tag)</code> nodes. We can't capture <code>(start_tag)</code> and <code>(end_tag)</code> as -<code>@rainbow.scope</code> because they don't nest other elements. We can fix this case -by removing the requirement that <code><</code>, <code>></code> and <code></</code> are direct descendants of -<code>(element)</code> using the <code>rainbow.include-children</code> property.</p> -<pre><code class="language-tsq">((element) @rainbow.scope - (#set! rainbow.include-children)) -</code></pre> -<p>With this property set, <code><</code>, <code>></code>, and <code></</code> will highlight with rainbow colors -even though they aren't direct descendents of the <code>(element)</code> node.</p> -<p><code>rainbow.include-children</code> is not necessary for the vast majority of programming -languages. It is only necessary when the node that increments the nesting level -(changes rainbow color) is not the direct parent of the bracket node.</p> - - </main> - - <nav class="nav-wrapper" aria-label="Page navigation"> - <!-- Mobile navigation buttons --> - <a rel="prev" href="../guides/injection.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - - <div style="clear: both"></div> - </nav> - </div> - </div> - - <nav class="nav-wide-wrapper" aria-label="Page navigation"> - <a rel="prev" href="../guides/injection.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> - <i class="fa fa-angle-left"></i> - </a> - - </nav> - - </div> - - - - - <script> - window.playground_copyable = true; - </script> - - - <script src="../elasticlunr.min.js"></script> - <script src="../mark.min.js"></script> - <script src="../searcher.js"></script> - - <script src="../clipboard.min.js"></script> - <script src="../highlight.js"></script> - <script src="../book.js"></script> - - <!-- Custom JS scripts --> - - - </div> - </body> -</html> |