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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 > < 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 = "../hooks.html" > < strong aria-hidden = "true" > 4.3.< / strong > Hooks< / a > < / li > < li class = "chapter-item expanded " > < a href = "../languages.html" > < strong aria-hidden = "true" > 4.4.< / 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" class = "active" > < strong aria-hidden = "true" > 5.2.< / strong > Adding Textobject Queries< / a > < / li > < / ol > < / li > < / ol >
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< h1 id = "adding-textobject-queries" > < a class = "header" href = "#adding-textobject-queries" > Adding Textobject Queries< / a > < / h1 >
< p > Textobjects that are language specific (< a href = "../usage.html#textobjects" > like functions, classes, etc< / a > )
require an accompanying tree-sitter grammar and a < code > textobjects.scm< / code > query file
to work properly. Tree-sitter allows us to query the source code syntax tree
and capture specific parts of it. The queries are written in a lisp dialect.
More information on how to write queries can be found in the < a href = "https://tree-sitter.github.io/tree-sitter/using-parsers#query-syntax" > official tree-sitter
documentation< / a > .< / p >
< p > Query files should be placed in < code > runtime/queries/{language}/textobjects.scm< / code >
when contributing. Note that to test the query files locally you should put
them under your local runtime directory (< code > ~/.config/helix/runtime< / code > on Linux
for example).< / p >
< p > The following < a href = "https://tree-sitter.github.io/tree-sitter/using-parsers#capturing-nodes" > captures< / a > are recognized:< / p >
< table > < thead > < tr > < th > Capture Name< / th > < / tr > < / thead > < tbody >
< tr > < td > < code > function.inside< / code > < / td > < / tr >
< tr > < td > < code > function.around< / code > < / td > < / tr >
< tr > < td > < code > class.inside< / code > < / td > < / tr >
< tr > < td > < code > class.around< / code > < / td > < / tr >
< tr > < td > < code > parameter.inside< / code > < / td > < / tr >
< tr > < td > < code > comment.inside< / code > < / td > < / tr >
< tr > < td > < code > comment.around< / code > < / td > < / tr >
< / tbody > < / table >
< p > < a href = "https://github.com/search?q=repo%3Ahelix-editor%2Fhelix+filename%3Atextobjects.scm&type=Code&ref=advsearch&l=&l=" > Example query files< / a > can be found in the helix GitHub repository.< / p >
< h2 id = "queries-for-textobject-based-navigation" > < a class = "header" href = "#queries-for-textobject-based-navigation" > Queries for Textobject Based Navigation< / a > < / h2 >
< p > < a href = "../usage.html#tree-sitter-textobject-based-navigation" > Tree-sitter based navigation< / a > is done using captures in the
following order:< / p >
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< li > < code > object.movement< / code > < / li >
< li > < code > object.around< / code > < / li >
< li > < code > object.inside< / code > < / li >
< / ul >
< p > For example if a < code > function.around< / code > capture has been already defined for a language
in it's < code > textobjects.scm< / code > file, function navigation should also work automatically.
< code > function.movement< / code > should be defined only if the node captured by < code > function.around< / code >
doesn't make sense in a navigation context.< / p >
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