<!DOCTYPE HTML>
< html lang = "en" class = "colibri sidebar-visible" dir = "ltr" >
< head >
<!-- Book generated using mdBook -->
< meta charset = "UTF-8" >
< title > Textobjects< / 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" >
<!-- Provide site root to javascript -->
< script >
var path_to_root = "";
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "colibri" : "colibri";
< / script >
<!-- Start loading toc.js asap -->
< script src = "toc.js" > < / script >
< / head >
< body >
< div id = "body-container" >
<!-- 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; }
const html = document.documentElement;
html.classList.remove('colibri')
html.classList.add(theme);
html.classList.add("js");
< / script >
< input type = "checkbox" id = "sidebar-toggle-anchor" class = "hidden" >
<!-- Hide / unhide sidebar before it is displayed -->
< script >
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';
html.classList.remove('sidebar-visible');
html.classList.add("sidebar-" + sidebar);
< / script >
< nav id = "sidebar" class = "sidebar" aria-label = "Table of contents" >
<!-- populated by js -->
< mdbook-sidebar-scrollbox class = "sidebar-scrollbox" > < / mdbook-sidebar-scrollbox >
< noscript >
< iframe class = "sidebar-iframe-outer" src = "toc.html" > < / iframe >
< / noscript >
< div id = "sidebar-resize-handle" class = "sidebar-resize-handle" >
< div class = "sidebar-resize-indicator" > < / div >
< / div >
< / nav >
< div id = "page-wrapper" class = "page-wrapper" >
< div class = "page" >
< div id = "menu-bar-hover-placeholder" > < / div >
< div id = "menu-bar" class = "menu-bar sticky" >
< div class = "left-buttons" >
< label id = "sidebar-toggle" class = "icon-button" for = "sidebar-toggle-anchor" title = "Toggle Table of Contents" aria-label = "Toggle Table of Contents" aria-controls = "sidebar" >
< i class = "fa fa-bars" > < / i >
< / label >
< button id = "theme-toggle" class = "icon-button" type = "button" title = "Change theme" aria-label = "Change theme" aria-haspopup = "true" aria-expanded = "false" aria-controls = "theme-list" >
< i class = "fa fa-paint-brush" > < / i >
< / button >
< ul id = "theme-list" class = "theme-popup" aria-label = "Themes" role = "menu" >
< li role = "none" > < button role = "menuitem" class = "theme" id = "light" > Light< / button > < / li >
< li role = "none" > < button role = "menuitem" class = "theme" id = "rust" > Rust< / button > < / li >
< li role = "none" > < button role = "menuitem" class = "theme" id = "coal" > Coal< / button > < / li >
< li role = "none" > < button role = "menuitem" class = "theme" id = "navy" > Navy< / button > < / li >
< li role = "none" > < button role = "menuitem" class = "theme" id = "ayu" > Ayu< / button > < / li >
< li role = "none" > < button role = "menuitem" class = "theme" id = "colibri" > Colibri< / button > < / li >
< / ul >
< 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" >
< 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/textobjects.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 >
< h2 id = "selecting-and-manipulating-text-with-textobjects" > < a class = "header" href = "#selecting-and-manipulating-text-with-textobjects" > Selecting and manipulating text with textobjects< / a > < / h2 >
< p > In Helix, textobjects are a way to select, manipulate and operate on a piece of
text in a structured way. They allow you to refer to blocks of text based on
their structure or purpose, such as a word, sentence, paragraph, or even a
function or block of code.< / p >
< p > < img src = "https://user-images.githubusercontent.com/23398472/124231131-81a4bb00-db2d-11eb-9d10-8e577ca7b177.gif" alt = "Textobject demo" / >
< img src = "https://user-images.githubusercontent.com/23398472/132537398-2a2e0a54-582b-44ab-a77f-eb818942203d.gif" alt = "Textobject tree-sitter demo" / > < / p >
< ul >
< li > < code > ma< / code > - Select around the object (< code > va< / code > in Vim, < code > < alt-a> < / code > in Kakoune)< / li >
< li > < code > mi< / code > - Select inside the object (< code > vi< / code > in Vim, < code > < alt-i> < / code > in Kakoune)< / li >
< / ul >
< div class = "table-wrapper" > < table > < thead > < tr > < th > Key after < code > mi< / code > or < code > ma< / code > < / th > < th > Textobject selected< / th > < / tr > < / thead > < tbody >
< tr > < td > < code > w< / code > < / td > < td > Word< / td > < / tr >
< tr > < td > < code > W< / code > < / td > < td > WORD< / td > < / tr >
< tr > < td > < code > p< / code > < / td > < td > Paragraph< / td > < / tr >
< tr > < td > < code > (< / code > , < code > [< / code > , < code > '< / code > , etc.< / td > < td > Specified surround pairs< / td > < / tr >
< tr > < td > < code > m< / code > < / td > < td > The closest surround pair< / td > < / tr >
< tr > < td > < code > f< / code > < / td > < td > Function< / td > < / tr >
< tr > < td > < code > t< / code > < / td > < td > Type (or Class)< / td > < / tr >
< tr > < td > < code > a< / code > < / td > < td > Argument/parameter< / td > < / tr >
< tr > < td > < code > c< / code > < / td > < td > Comment< / td > < / tr >
< tr > < td > < code > T< / code > < / td > < td > Test< / td > < / tr >
< tr > < td > < code > g< / code > < / td > < td > Change< / td > < / tr >
< / tbody > < / table >
< / div >
< blockquote >
< p > 💡 < code > f< / code > , < code > t< / code > , etc. need a tree-sitter grammar active for the current
document and a special tree-sitter query file to work properly. < a href = "./lang-support.html" > Only
some grammars< / a > currently have the query file implemented.
Contributions are welcome!< / p >
< / blockquote >
< h2 id = "navigating-using-tree-sitter-textobjects" > < a class = "header" href = "#navigating-using-tree-sitter-textobjects" > Navigating using tree-sitter textobjects< / a > < / h2 >
< p > Navigating between functions, classes, parameters, and other elements is
possible using tree-sitter and textobject queries. For
example to move to the next function use < code > ]f< / code > , to move to previous
type use < code > [t< / code > , and so on.< / p >
< p > < img src = "https://user-images.githubusercontent.com/23398472/152332550-7dfff043-36a2-4aec-b8f2-77c13eb56d6f.gif" alt = "Tree-sitter-nav-demo" / > < / p >
< p > For the full reference see the < a href = "./keymap.html#unimpaired" > unimpaired< / a > section of the key bind
documentation.< / p >
< blockquote >
< p > 💡 This feature relies on tree-sitter textobjects
and requires the corresponding query file to work properly.< / p >
< / blockquote >
< / main >
< nav class = "nav-wrapper" aria-label = "Page navigation" >
<!-- Mobile navigation buttons -->
< a rel = "prev" href = "surround.html" class = "mobile-nav-chapters previous" title = "Previous chapter" aria-label = "Previous chapter" aria-keyshortcuts = "Left" >
< i class = "fa fa-angle-left" > < / i >
< / a >
< a rel = "next prefetch" href = "syntax-aware-motions.html" class = "mobile-nav-chapters next" title = "Next chapter" aria-label = "Next chapter" aria-keyshortcuts = "Right" >
< i class = "fa fa-angle-right" > < / i >
< / a >
< div style = "clear: both" > < / div >
< / nav >
< / div >
< / div >
< nav class = "nav-wide-wrapper" aria-label = "Page navigation" >
< a rel = "prev" href = "surround.html" class = "nav-chapters previous" title = "Previous chapter" aria-label = "Previous chapter" aria-keyshortcuts = "Left" >
< i class = "fa fa-angle-left" > < / i >
< / a >
< a rel = "next prefetch" href = "syntax-aware-motions.html" class = "nav-chapters next" title = "Next chapter" aria-label = "Next chapter" aria-keyshortcuts = "Right" >
< i class = "fa fa-angle-right" > < / 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 >
