diff --git a/helix-core/src/auto_pairs.rs b/helix-core/src/auto_pairs.rs index 52a45075f..e6b8f6675 100644 --- a/helix-core/src/auto_pairs.rs +++ b/helix-core/src/auto_pairs.rs @@ -1,6 +1,8 @@ use crate::{Range, Rope, Selection, Tendril, Transaction}; use smallvec::SmallVec; +// Heavily based on https://github.com/codemirror/closebrackets/ + const PAIRS: &[(char, char)] = &[ ('(', ')'), ('{', '}'), diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs index a8a449cad..30b3d37f1 100644 --- a/helix-core/src/lib.rs +++ b/helix-core/src/lib.rs @@ -6,6 +6,7 @@ pub mod graphemes; mod history; pub mod indent; pub mod macros; +pub mod match_brackets; pub mod movement; pub mod object; mod position; diff --git a/helix-core/src/match_brackets.rs b/helix-core/src/match_brackets.rs new file mode 100644 index 000000000..bacd764ff --- /dev/null +++ b/helix-core/src/match_brackets.rs @@ -0,0 +1,34 @@ +use crate::{Range, Rope, Selection, Syntax}; + +// const PAIRS: &[(char, char)] = &[('(', ')'), ('{', '}'), ('[', ']')]; +// limit matching pairs to only ( ) { } [ ] < > + +pub fn find(syntax: &Syntax, doc: &Rope, pos: usize) -> Option { + let tree = syntax.root_layer.tree.as_ref().unwrap(); + + let byte_pos = doc.char_to_byte(pos); + + // most naive implementation: find the innermost syntax node, if we're at the edge of a node, + // return the other edge. + + let mut node = match tree + .root_node() + .named_descendant_for_byte_range(byte_pos, byte_pos) + { + Some(node) => node, + None => return None, + }; + + let start_byte = node.start_byte(); + let end_byte = node.end_byte() - 1; // it's end exclusive + + if start_byte == byte_pos { + return Some(doc.byte_to_char(end_byte)); + } + + if end_byte == byte_pos { + return Some(doc.byte_to_char(start_byte)); + } + + None +} diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs index b9ee933d1..3f0e32a0f 100644 --- a/helix-term/src/commands.rs +++ b/helix-term/src/commands.rs @@ -1,5 +1,5 @@ use helix_core::{ - comment, coords_at_pos, graphemes, + comment, coords_at_pos, graphemes, match_brackets, movement::{self, Direction}, object, pos_at_coords, regex::{self, Regex}, @@ -1592,3 +1592,15 @@ pub fn expand_selection(cx: &mut Context) { doc.set_selection(selection); } } + +pub fn match_brackets(cx: &mut Context) { + let mut doc = cx.doc(); + + if let Some(syntax) = doc.syntax() { + let pos = doc.selection().cursor(); + if let Some(pos) = match_brackets::find(syntax, doc.text(), pos) { + let selection = Selection::point(pos); + doc.set_selection(selection); + }; + } +} diff --git a/helix-term/src/keymap.rs b/helix-term/src/keymap.rs index 1f34aa9eb..bd1b31efb 100644 --- a/helix-term/src/keymap.rs +++ b/helix-term/src/keymap.rs @@ -182,6 +182,9 @@ pub fn default() -> Keymaps { // or select mode X? // extend_to_whole_line, crop_to_whole_line + + key!('m') => commands::match_brackets, + // TODO: refactor into // key!('m') => commands::select_to_matching, // key!('M') => commands::back_select_to_matching, // select mode extend equivalents