toggling of block comments (#4718)

book/src/keymap.md

@@ -12,6 +12,7 @@ # Keymap
     - [Match mode](#match-mode)
     - [Window mode](#window-mode)
     - [Space mode](#space-mode)
+      - [Comment mode](#comment-mode)
       - [Popup](#popup)
     - [Unimpaired](#unimpaired)
 - [Insert mode](#insert-mode)
@@ -289,6 +290,9 @@ #### Space mode
 | `h`     | Select symbol references (**LSP**)                                      | `select_references_to_symbol_under_cursor` |
 | `'`     | Open last fuzzy picker                                                  | `last_picker`                              |
 | `w`     | Enter [window mode](#window-mode)                                       | N/A                                        |
+| `c`     | Comment/uncomment selections                                            | `toggle_comments`                          |
+| `C`     | Block comment/uncomment selections                                      | `toggle_block_comments`                    |
+| `Alt-c` | Line comment/uncomment selections                                       | `toggle_line_comments`                     |
 | `p`     | Paste system clipboard after selections                                 | `paste_clipboard_after`                    |
 | `P`     | Paste system clipboard before selections                                | `paste_clipboard_before`                   |
 | `y`     | Yank selections to clipboard                                            | `yank_to_clipboard`                        |

book/src/languages.md

@@ -42,7 +42,7 @@ ## Language configuration
 scope = "source.mylang"
 injection-regex = "mylang"
 file-types = ["mylang", "myl"]
-comment-token = "#"
+comment-tokens = "#"
 indent = { tab-width = 2, unit = "  " }
 formatter = { command = "mylang-formatter" , args = ["--stdin"] }
 language-servers = [ "mylang-lsp" ]
@@ -61,7 +61,8 @@ ## Language configuration
 | `roots`               | A set of marker files to look for when trying to find the workspace root. For example `Cargo.lock`, `yarn.lock` |
 | `auto-format`         | Whether to autoformat this language when saving               |
 | `diagnostic-severity` | Minimal severity of diagnostic for it to be displayed. (Allowed values: `Error`, `Warning`, `Info`, `Hint`) |
-| `comment-token`       | The token to use as a comment-token                           |
+| `comment-tokens`      | The tokens to use as a comment token, either a single token `"//"` or an array `["//", "///", "//!"]` (the first token will be used for commenting). Also configurable as `comment-token` for backwards compatibility|
+| `block-comment-tokens`| The start and end tokens for a multiline comment either an array or single table of `{ start = "/*", end = "*/"}`. The first set of tokens will be used for commenting, any pairs in the array can be uncommented |
 | `indent`              | The indent to use. Has sub keys `unit` (the text inserted into the document when indenting; usually set to N spaces or `"\t"` for tabs) and `tab-width` (the number of spaces rendered for a tab) |
 | `language-servers`    | The Language Servers used for this language. See below for more information in the section [Configuring Language Servers for a language](#configuring-language-servers-for-a-language)   |
 | `grammar`             | The tree-sitter grammar to use (defaults to the value of `name`) |

helix-core/src/comment.rs

@@ -1,9 +1,12 @@
 //! This module contains the functionality toggle comments on lines over the selection
 //! using the comment character defined in the user's `languages.toml`
 
+use smallvec::SmallVec;
+
 use crate::{
-    find_first_non_whitespace_char, Change, Rope, RopeSlice, Selection, Tendril, Transaction,
+    syntax::BlockCommentToken, Change, Range, Rope, RopeSlice, Selection, Tendril, Transaction,
 };
+use helix_stdx::rope::RopeSliceExt;
 use std::borrow::Cow;
 
 /// Given text, a comment token, and a set of line indices, returns the following:
@@ -22,12 +25,12 @@ fn find_line_comment(
 ) -> (bool, Vec<usize>, usize, usize) {
     let mut commented = true;
     let mut to_change = Vec::new();
-    let mut min = usize::MAX; // minimum col for find_first_non_whitespace_char
+    let mut min = usize::MAX; // minimum col for first_non_whitespace_char
     let mut margin = 1;
     let token_len = token.chars().count();
     for line in lines {
         let line_slice = text.line(line);
-        if let Some(pos) = find_first_non_whitespace_char(line_slice) {
+        if let Some(pos) = line_slice.first_non_whitespace_char() {
             let len = line_slice.len_chars();
 
             if pos < min {
@@ -94,6 +97,222 @@ pub fn toggle_line_comments(doc: &Rope, selection: &Selection, token: Option<&st
     Transaction::change(doc, changes.into_iter())
 }
 
+#[derive(Debug, PartialEq, Eq)]
+pub enum CommentChange {
+    Commented {
+        range: Range,
+        start_pos: usize,
+        end_pos: usize,
+        start_margin: bool,
+        end_margin: bool,
+        start_token: String,
+        end_token: String,
+    },
+    Uncommented {
+        range: Range,
+        start_pos: usize,
+        end_pos: usize,
+        start_token: String,
+        end_token: String,
+    },
+    Whitespace {
+        range: Range,
+    },
+}
+
+pub fn find_block_comments(
+    tokens: &[BlockCommentToken],
+    text: RopeSlice,
+    selection: &Selection,
+) -> (bool, Vec<CommentChange>) {
+    let mut commented = true;
+    let mut only_whitespace = true;
+    let mut comment_changes = Vec::with_capacity(selection.len());
+    let default_tokens = tokens.first().cloned().unwrap_or_default();
+    // TODO: check if this can be removed on MSRV bump
+    #[allow(clippy::redundant_clone)]
+    let mut start_token = default_tokens.start.clone();
+    #[allow(clippy::redundant_clone)]
+    let mut end_token = default_tokens.end.clone();
+
+    let mut tokens = tokens.to_vec();
+    // sort the tokens by length, so longer tokens will match first
+    tokens.sort_by(|a, b| {
+        if a.start.len() == b.start.len() {
+            b.end.len().cmp(&a.end.len())
+        } else {
+            b.start.len().cmp(&a.start.len())
+        }
+    });
+    for range in selection {
+        let selection_slice = range.slice(text);
+        if let (Some(start_pos), Some(end_pos)) = (
+            selection_slice.first_non_whitespace_char(),
+            selection_slice.last_non_whitespace_char(),
+        ) {
+            let mut line_commented = false;
+            let mut after_start = 0;
+            let mut before_end = 0;
+            let len = (end_pos + 1) - start_pos;
+
+            for BlockCommentToken { start, end } in &tokens {
+                let start_len = start.chars().count();
+                let end_len = end.chars().count();
+                after_start = start_pos + start_len;
+                before_end = end_pos.saturating_sub(end_len);
+
+                if len >= start_len + end_len {
+                    let start_fragment = selection_slice.slice(start_pos..after_start);
+                    let end_fragment = selection_slice.slice(before_end + 1..end_pos + 1);
+
+                    // block commented with these tokens
+                    if start_fragment == start.as_str() && end_fragment == end.as_str() {
+                        start_token = start.to_string();
+                        end_token = end.to_string();
+                        line_commented = true;
+                        break;
+                    }
+                }
+            }
+
+            if !line_commented {
+                comment_changes.push(CommentChange::Uncommented {
+                    range: *range,
+                    start_pos,
+                    end_pos,
+                    start_token: default_tokens.start.clone(),
+                    end_token: default_tokens.end.clone(),
+                });
+                commented = false;
+            } else {
+                comment_changes.push(CommentChange::Commented {
+                    range: *range,
+                    start_pos,
+                    end_pos,
+                    start_margin: selection_slice
+                        .get_char(after_start)
+                        .map_or(false, |c| c == ' '),
+                    end_margin: after_start != before_end
+                        && selection_slice
+                            .get_char(before_end)
+                            .map_or(false, |c| c == ' '),
+                    start_token: start_token.to_string(),
+                    end_token: end_token.to_string(),
+                });
+            }
+            only_whitespace = false;
+        } else {
+            comment_changes.push(CommentChange::Whitespace { range: *range });
+        }
+    }
+    if only_whitespace {
+        commented = false;
+    }
+    (commented, comment_changes)
+}
+
+#[must_use]
+pub fn create_block_comment_transaction(
+    doc: &Rope,
+    selection: &Selection,
+    commented: bool,
+    comment_changes: Vec<CommentChange>,
+) -> (Transaction, SmallVec<[Range; 1]>) {
+    let mut changes: Vec<Change> = Vec::with_capacity(selection.len() * 2);
+    let mut ranges: SmallVec<[Range; 1]> = SmallVec::with_capacity(selection.len());
+    let mut offs = 0;
+    for change in comment_changes {
+        if commented {
+            if let CommentChange::Commented {
+                range,
+                start_pos,
+                end_pos,
+                start_token,
+                end_token,
+                start_margin,
+                end_margin,
+            } = change
+            {
+                let from = range.from();
+                changes.push((
+                    from + start_pos,
+                    from + start_pos + start_token.len() + start_margin as usize,
+                    None,
+                ));
+                changes.push((
+                    from + end_pos - end_token.len() - end_margin as usize + 1,
+                    from + end_pos + 1,
+                    None,
+                ));
+            }
+        } else {
+            // uncommented so manually map ranges through changes
+            match change {
+                CommentChange::Uncommented {
+                    range,
+                    start_pos,
+                    end_pos,
+                    start_token,
+                    end_token,
+                } => {
+                    let from = range.from();
+                    changes.push((
+                        from + start_pos,
+                        from + start_pos,
+                        Some(Tendril::from(format!("{} ", start_token))),
+                    ));
+                    changes.push((
+                        from + end_pos + 1,
+                        from + end_pos + 1,
+                        Some(Tendril::from(format!(" {}", end_token))),
+                    ));
+
+                    let offset = start_token.chars().count() + end_token.chars().count() + 2;
+                    ranges.push(
+                        Range::new(from + offs, from + offs + end_pos + 1 + offset)
+                            .with_direction(range.direction()),
+                    );
+                    offs += offset;
+                }
+                CommentChange::Commented { range, .. } | CommentChange::Whitespace { range } => {
+                    ranges.push(Range::new(range.from() + offs, range.to() + offs));
+                }
+            }
+        }
+    }
+    (Transaction::change(doc, changes.into_iter()), ranges)
+}
+
+#[must_use]
+pub fn toggle_block_comments(
+    doc: &Rope,
+    selection: &Selection,
+    tokens: &[BlockCommentToken],
+) -> Transaction {
+    let text = doc.slice(..);
+    let (commented, comment_changes) = find_block_comments(tokens, text, selection);
+    let (mut transaction, ranges) =
+        create_block_comment_transaction(doc, selection, commented, comment_changes);
+    if !commented {
+        transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index()));
+    }
+    transaction
+}
+
+pub fn split_lines_of_selection(text: RopeSlice, selection: &Selection) -> Selection {
+    let mut ranges = SmallVec::new();
+    for range in selection.ranges() {
+        let (line_start, line_end) = range.line_range(text.slice(..));
+        let mut pos = text.line_to_char(line_start);
+        for line in text.slice(pos..text.line_to_char(line_end + 1)).lines() {
+            let start = pos;
+            pos += line.len_chars();
+            ranges.push(Range::new(start, pos));
+        }
+    }
+    Selection::new(ranges, 0)
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
@@ -149,4 +368,49 @@ fn test_find_line_comment() {
 
         // TODO: account for uncommenting with uneven comment indentation
     }
+
+    #[test]
+    fn test_find_block_comments() {
+        // three lines 5 characters.
+        let mut doc = Rope::from("1\n2\n3");
+        // select whole document
+        let selection = Selection::single(0, doc.len_chars());
+
+        let text = doc.slice(..);
+
+        let res = find_block_comments(&[BlockCommentToken::default()], text, &selection);
+
+        assert_eq!(
+            res,
+            (
+                false,
+                vec![CommentChange::Uncommented {
+                    range: Range::new(0, 5),
+                    start_pos: 0,
+                    end_pos: 4,
+                    start_token: "/*".to_string(),
+                    end_token: "*/".to_string(),
+                }]
+            )
+        );
+
+        // comment
+        let transaction = toggle_block_comments(&doc, &selection, &[BlockCommentToken::default()]);
+        transaction.apply(&mut doc);
+
+        assert_eq!(doc, "/* 1\n2\n3 */");
+
+        // uncomment
+        let selection = Selection::single(0, doc.len_chars());
+        let transaction = toggle_block_comments(&doc, &selection, &[BlockCommentToken::default()]);
+        transaction.apply(&mut doc);
+        assert_eq!(doc, "1\n2\n3");
+
+        // don't panic when there is just a space in comment
+        doc = Rope::from("/* */");
+        let selection = Selection::single(0, doc.len_chars());
+        let transaction = toggle_block_comments(&doc, &selection, &[BlockCommentToken::default()]);
+        transaction.apply(&mut doc);
+        assert_eq!(doc, "");
+    }
 }

helix-core/src/indent.rs

@@ -1,10 +1,10 @@
 use std::{borrow::Cow, collections::HashMap};
 
+use helix_stdx::rope::RopeSliceExt;
 use tree_sitter::{Query, QueryCursor, QueryPredicateArg};
 
 use crate::{
     chars::{char_is_line_ending, char_is_whitespace},
-    find_first_non_whitespace_char,
     graphemes::{grapheme_width, tab_width_at},
     syntax::{IndentationHeuristic, LanguageConfiguration, RopeProvider, Syntax},
     tree_sitter::Node,
@@ -970,7 +970,7 @@ pub fn indent_for_newline(
                 let mut num_attempts = 0;
                 for line_idx in (0..=line_before).rev() {
                     let line = text.line(line_idx);
-                    let first_non_whitespace_char = match find_first_non_whitespace_char(line) {
+                    let first_non_whitespace_char = match line.first_non_whitespace_char() {
                         Some(i) => i,
                         None => {
                             continue;

helix-core/src/lib.rs

@@ -37,9 +37,6 @@ pub mod unicode {
 
 pub use helix_loader::find_workspace;
 
-pub fn find_first_non_whitespace_char(line: RopeSlice) -> Option<usize> {
-    line.chars().position(|ch| !ch.is_whitespace())
-}
 mod rope_reader;
 
 pub use rope_reader::RopeReader;

helix-core/src/syntax.rs

@@ -99,7 +99,19 @@ pub struct LanguageConfiguration {
     pub shebangs: Vec<String>, // interpreter(s) associated with language
     #[serde(default)]
     pub roots: Vec<String>, // these indicate project roots <.git, Cargo.toml>
-    pub comment_token: Option<String>,
+    #[serde(
+        default,
+        skip_serializing,
+        deserialize_with = "from_comment_tokens",
+        alias = "comment-token"
+    )]
+    pub comment_tokens: Option<Vec<String>>,
+    #[serde(
+        default,
+        skip_serializing,
+        deserialize_with = "from_block_comment_tokens"
+    )]
+    pub block_comment_tokens: Option<Vec<BlockCommentToken>>,
     pub text_width: Option<usize>,
     pub soft_wrap: Option<SoftWrap>,
 
@@ -240,6 +252,59 @@ fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error>
     }
 }
 
+fn from_comment_tokens<'de, D>(deserializer: D) -> Result<Option<Vec<String>>, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    #[derive(Deserialize)]
+    #[serde(untagged)]
+    enum CommentTokens {
+        Multiple(Vec<String>),
+        Single(String),
+    }
+    Ok(
+        Option::<CommentTokens>::deserialize(deserializer)?.map(|tokens| match tokens {
+            CommentTokens::Single(val) => vec![val],
+            CommentTokens::Multiple(vals) => vals,
+        }),
+    )
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct BlockCommentToken {
+    pub start: String,
+    pub end: String,
+}
+
+impl Default for BlockCommentToken {
+    fn default() -> Self {
+        BlockCommentToken {
+            start: "/*".to_string(),
+            end: "*/".to_string(),
+        }
+    }
+}
+
+fn from_block_comment_tokens<'de, D>(
+    deserializer: D,
+) -> Result<Option<Vec<BlockCommentToken>>, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    #[derive(Deserialize)]
+    #[serde(untagged)]
+    enum BlockCommentTokens {
+        Multiple(Vec<BlockCommentToken>),
+        Single(BlockCommentToken),
+    }
+    Ok(
+        Option::<BlockCommentTokens>::deserialize(deserializer)?.map(|tokens| match tokens {
+            BlockCommentTokens::Single(val) => vec![val],
+            BlockCommentTokens::Multiple(vals) => vals,
+        }),
+    )
+}
+
 #[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq, Hash)]
 #[serde(rename_all = "kebab-case")]
 pub enum LanguageServerFeature {

helix-core/tests/indent.rs

@@ -4,6 +4,7 @@
     syntax::{Configuration, Loader},
     Syntax,
 };
+use helix_stdx::rope::RopeSliceExt;
 use ropey::Rope;
 use std::{ops::Range, path::PathBuf, process::Command, sync::Arc};
 
@@ -211,7 +212,7 @@ fn test_treesitter_indent(
         if ignored_lines.iter().any(|range| range.contains(&(i + 1))) {
             continue;
         }
-        if let Some(pos) = helix_core::find_first_non_whitespace_char(line) {
+        if let Some(pos) = line.first_non_whitespace_char() {
             let tab_width: usize = 4;
             let suggested_indent = treesitter_indent_for_pos(
                 indent_query,

helix-stdx/src/rope.rs

@@ -14,6 +14,8 @@ fn regex_input_at_bytes<R: RangeBounds<usize>>(
         byte_range: R,
     ) -> RegexInput<RopeyCursor<'a>>;
     fn regex_input_at<R: RangeBounds<usize>>(self, char_range: R) -> RegexInput<RopeyCursor<'a>>;
+    fn first_non_whitespace_char(self) -> Option<usize>;
+    fn last_non_whitespace_char(self) -> Option<usize>;
 }
 
 impl<'a> RopeSliceExt<'a> for RopeSlice<'a> {
@@ -64,4 +66,13 @@ fn regex_input_at_bytes<R: RangeBounds<usize>>(
         };
         input.range(byte_range)
     }
+    fn first_non_whitespace_char(self) -> Option<usize> {
+        self.chars().position(|ch| !ch.is_whitespace())
+    }
+    fn last_non_whitespace_char(self) -> Option<usize> {
+        self.chars_at(self.len_chars())
+            .reversed()
+            .position(|ch| !ch.is_whitespace())
+            .map(|pos| self.len_chars() - pos - 1)
+    }
 }

helix-term/src/commands.rs

@@ -12,7 +12,7 @@
 use helix_core::{
     char_idx_at_visual_offset, comment,
     doc_formatter::TextFormat,
-    encoding, find_first_non_whitespace_char, find_workspace, graphemes,
+    encoding, find_workspace, graphemes,
     history::UndoKind,
     increment, indent,
     indent::IndentStyle,
@@ -23,7 +23,7 @@
     regex::{self, Regex},
     search::{self, CharMatcher},
     selection, shellwords, surround,
-    syntax::LanguageServerFeature,
+    syntax::{BlockCommentToken, LanguageServerFeature},
     text_annotations::TextAnnotations,
     textobject,
     tree_sitter::Node,
@@ -415,6 +415,8 @@ pub fn doc(&self) -> &str {
         completion, "Invoke completion popup",
         hover, "Show docs for item under cursor",
         toggle_comments, "Comment/uncomment selections",
+        toggle_line_comments, "Line comment/uncomment selections",
+        toggle_block_comments, "Block comment/uncomment selections",
         rotate_selections_forward, "Rotate selections forward",
         rotate_selections_backward, "Rotate selections backward",
         rotate_selection_contents_forward, "Rotate selection contents forward",
@@ -822,7 +824,7 @@ fn kill_to_line_start(cx: &mut Context) {
             let head = if anchor == first_char && line != 0 {
                 // select until previous line
                 line_end_char_index(&text, line - 1)
-            } else if let Some(pos) = find_first_non_whitespace_char(text.line(line)) {
+            } else if let Some(pos) = text.line(line).first_non_whitespace_char() {
                 if first_char + pos < anchor {
                     // select until first non-blank in line if cursor is after it
                     first_char + pos
@@ -884,7 +886,7 @@ fn goto_first_nonwhitespace_impl(view: &mut View, doc: &mut Document, movement:
     let selection = doc.selection(view.id).clone().transform(|range| {
         let line = range.cursor_line(text);
 
-        if let Some(pos) = find_first_non_whitespace_char(text.line(line)) {
+        if let Some(pos) = text.line(line).first_non_whitespace_char() {
             let pos = pos + text.line_to_char(line);
             range.put_cursor(text, pos, movement == Movement::Extend)
         } else {
@@ -3087,11 +3089,11 @@ fn insert_with_indent(cx: &mut Context, cursor_fallback: IndentFallbackPos) {
         } else {
             // move cursor to the fallback position
             let pos = match cursor_fallback {
-                IndentFallbackPos::LineStart => {
-                    find_first_non_whitespace_char(text.line(cursor_line))
+                IndentFallbackPos::LineStart => text
+                    .line(cursor_line)
+                    .first_non_whitespace_char()
                     .map(|ws_offset| ws_offset + cursor_line_start)
-                        .unwrap_or(cursor_line_start)
-                }
+                    .unwrap_or(cursor_line_start),
                 IndentFallbackPos::LineEnd => line_end_char_index(&text, cursor_line),
             };
 
@@ -4462,18 +4464,124 @@ pub fn completion(cx: &mut Context) {
 }
 
 // comments
-fn toggle_comments(cx: &mut Context) {
+type CommentTransactionFn = fn(
+    line_token: Option<&str>,
+    block_tokens: Option<&[BlockCommentToken]>,
+    doc: &Rope,
+    selection: &Selection,
+) -> Transaction;
+
+fn toggle_comments_impl(cx: &mut Context, comment_transaction: CommentTransactionFn) {
     let (view, doc) = current!(cx.editor);
-    let token = doc
+    let line_token: Option<&str> = doc
         .language_config()
-        .and_then(|lc| lc.comment_token.as_ref())
-        .map(|tc| tc.as_ref());
-    let transaction = comment::toggle_line_comments(doc.text(), doc.selection(view.id), token);
+        .and_then(|lc| lc.comment_tokens.as_ref())
+        .and_then(|tc| tc.first())
+        .map(|tc| tc.as_str());
+    let block_tokens: Option<&[BlockCommentToken]> = doc
+        .language_config()
+        .and_then(|lc| lc.block_comment_tokens.as_ref())
+        .map(|tc| &tc[..]);
+
+    let transaction =
+        comment_transaction(line_token, block_tokens, doc.text(), doc.selection(view.id));
 
     doc.apply(&transaction, view.id);
     exit_select_mode(cx);
 }
 
+/// commenting behavior:
+/// 1. only line comment tokens -> line comment
+/// 2. each line block commented -> uncomment all lines
+/// 3. whole selection block commented -> uncomment selection
+/// 4. all lines not commented and block tokens -> comment uncommented lines
+/// 5. no comment tokens and not block commented -> line comment
+fn toggle_comments(cx: &mut Context) {
+    toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| {
+        let text = doc.slice(..);
+
+        // only have line comment tokens
+        if line_token.is_some() && block_tokens.is_none() {
+            return comment::toggle_line_comments(doc, selection, line_token);
+        }
+
+        let split_lines = comment::split_lines_of_selection(text, selection);
+
+        let default_block_tokens = &[BlockCommentToken::default()];
+        let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens);
+
+        let (line_commented, line_comment_changes) =
+            comment::find_block_comments(block_comment_tokens, text, &split_lines);
+
+        // block commented by line would also be block commented so check this first
+        if line_commented {
+            return comment::create_block_comment_transaction(
+                doc,
+                &split_lines,
+                line_commented,
+                line_comment_changes,
+            )
+            .0;
+        }
+
+        let (block_commented, comment_changes) =
+            comment::find_block_comments(block_comment_tokens, text, selection);
+
+        // check if selection has block comments
+        if block_commented {
+            return comment::create_block_comment_transaction(
+                doc,
+                selection,
+                block_commented,
+                comment_changes,
+            )
+            .0;
+        }
+
+        // not commented and only have block comment tokens
+        if line_token.is_none() && block_tokens.is_some() {
+            return comment::create_block_comment_transaction(
+                doc,
+                &split_lines,
+                line_commented,
+                line_comment_changes,
+            )
+            .0;
+        }
+
+        // not block commented at all and don't have any tokens
+        comment::toggle_line_comments(doc, selection, line_token)
+    })
+}
+
+fn toggle_line_comments(cx: &mut Context) {
+    toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| {
+        if line_token.is_none() && block_tokens.is_some() {
+            let default_block_tokens = &[BlockCommentToken::default()];
+            let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens);
+            comment::toggle_block_comments(
+                doc,
+                &comment::split_lines_of_selection(doc.slice(..), selection),
+                block_comment_tokens,
+            )
+        } else {
+            comment::toggle_line_comments(doc, selection, line_token)
+        }
+    });
+}
+
+fn toggle_block_comments(cx: &mut Context) {
+    toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| {
+        if line_token.is_some() && block_tokens.is_none() {
+            comment::toggle_line_comments(doc, selection, line_token)
+        } else {
+            let default_block_tokens = &[BlockCommentToken::default()];
+            let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens);
+            comment::toggle_block_comments(doc, selection, block_comment_tokens)
+        }
+    });
+}
+
 fn rotate_selections(cx: &mut Context, direction: Direction) {
     let count = cx.count();
     let (view, doc) = current!(cx.editor);

helix-term/src/keymap/default.rs

@@ -276,6 +276,9 @@ pub fn default() -> HashMap<Mode, KeyTrie> {
             "k" => hover,
             "r" => rename_symbol,
             "h" => select_references_to_symbol_under_cursor,
+            "c" => toggle_comments,
+            "C" => toggle_block_comments,
+            "A-c" => toggle_line_comments,
             "?" => command_palette,
         },
         "z" => { "View"

languages.toml

@@ -191,7 +191,12 @@ injection-regex = "rust"
 file-types = ["rs"]
 roots = ["Cargo.toml", "Cargo.lock"]
 auto-format = true
-comment-token = "//"
+comment-tokens = ["//", "///", "//!"]
+block-comment-tokens = [
+  { start = "/*", end = "*/" },
+  { start = "/**", end = "*/" },
+  { start = "/*!", end = "*/" },
+]
 language-servers = [ "rust-analyzer" ]
 indent = { tab-width = 4, unit = "    " }
 persistent-diagnostic-sources = ["rustc", "clippy"]
@@ -283,6 +288,7 @@ injection-regex = "protobuf"
 file-types = ["proto"]
 language-servers = [ "bufls", "pbkit" ]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 
 [[grammar]]
@@ -326,6 +332,7 @@ injection-regex = "mint"
 file-types = ["mint"]
 shebangs = []
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "mint" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -408,6 +415,7 @@ scope = "source.c"
 injection-regex = "c"
 file-types = ["c"] # TODO: ["h"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "clangd" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -444,6 +452,7 @@ scope = "source.cpp"
 injection-regex = "cpp"
 file-types = ["cc", "hh", "c++", "cpp", "hpp", "h", "ipp", "tpp", "cxx", "hxx", "ixx", "txx", "ino", "C", "H", "cu", "cuh", "cppm", "h++", "ii", "inl", { glob = ".hpp.in" }, { glob = ".h.in" }]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "clangd" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -491,6 +500,7 @@ injection-regex = "c-?sharp"
 file-types = ["cs", "csx", "cake"]
 roots = ["sln", "csproj"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "\t" }
 language-servers = [ "omnisharp" ]
 
@@ -549,6 +559,7 @@ file-types = ["go"]
 roots = ["go.work", "go.mod"]
 auto-format = true
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "gopls", "golangci-lint-lsp" ]
 # TODO: gopls needs utf-8 offsets?
 indent = { tab-width = 4, unit = "\t" }
@@ -614,6 +625,7 @@ scope = "source.gotmpl"
 injection-regex = "gotmpl"
 file-types = ["gotmpl"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "gopls" ]
 indent = { tab-width = 2, unit = " " }
 
@@ -643,6 +655,7 @@ language-id = "javascript"
 file-types = ["js", "mjs", "cjs", "rules", "es6", "pac", { glob = "jakefile" }]
 shebangs = ["node"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "typescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -669,6 +682,7 @@ injection-regex = "jsx"
 language-id = "javascriptreact"
 file-types = ["jsx"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "typescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 grammar = "javascript"
@@ -680,6 +694,8 @@ injection-regex = "(ts|typescript)"
 file-types = ["ts", "mts", "cts"]
 language-id = "typescript"
 shebangs = ["deno", "ts-node"]
+comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "typescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -693,6 +709,8 @@ scope = "source.tsx"
 injection-regex = "(tsx)" # |typescript
 language-id = "typescriptreact"
 file-types = ["tsx"]
+comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "typescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -705,6 +723,7 @@ name = "css"
 scope = "source.css"
 injection-regex = "css"
 file-types = ["css", "scss"]
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "vscode-css-language-server" ]
 auto-format = true
 indent = { tab-width = 2, unit = "  " }
@@ -718,6 +737,7 @@ name = "scss"
 scope = "source.scss"
 injection-regex = "scss"
 file-types = ["scss"]
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "vscode-css-language-server" ]
 auto-format = true
 indent = { tab-width = 2, unit = "  " }
@@ -731,6 +751,7 @@ name = "html"
 scope = "text.html.basic"
 injection-regex = "html"
 file-types = ["html", "htm", "shtml", "xhtml", "xht", "jsp", "asp", "aspx", "jshtm", "volt", "rhtml"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 language-servers = [ "vscode-html-language-server" ]
 auto-format = true
 indent = { tab-width = 2, unit = "  " }
@@ -901,6 +922,7 @@ injection-regex = "php"
 file-types = ["php", "inc", "php4", "php5", "phtml", "ctp"]
 shebangs = ["php"]
 roots = ["composer.json", "index.php"]
+comment-token = "//"
 language-servers = [ "intelephense" ]
 indent = { tab-width = 4, unit = "    " }
 
@@ -913,6 +935,7 @@ name = "twig"
 scope = "source.twig"
 injection-regex = "twig"
 file-types = ["twig"]
+block-comment-tokens = { start = "{#", end = "#}" }
 indent = { tab-width = 2, unit = "  " }
 
 [[grammar]]
@@ -966,6 +989,7 @@ injection-regex = "lean"
 file-types = ["lean"]
 roots = [ "lakefile.lean" ]
 comment-token = "--"
+block-comment-tokens = { start = "/-", end = "-/" }
 language-servers = [ "lean" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -992,6 +1016,7 @@ file-types = ["jl"]
 shebangs = ["julia"]
 roots = ["Manifest.toml", "Project.toml"]
 comment-token = "#"
+block-comment-tokens = { start = "#=", end = "=#" }
 language-servers = [ "julia" ]
 indent = { tab-width = 4, unit = "    " }
 
@@ -1055,6 +1080,7 @@ scope = "source.ocaml"
 injection-regex = "ocaml"
 file-types = ["ml"]
 shebangs = ["ocaml", "ocamlrun", "ocamlscript"]
+block-comment-tokens = { start = "(*", end = "*)" }
 comment-token = "(**)"
 language-servers = [ "ocamllsp" ]
 indent = { tab-width = 2, unit = "  " }
@@ -1074,6 +1100,7 @@ name = "ocaml-interface"
 scope = "source.ocaml.interface"
 file-types = ["mli"]
 shebangs = []
+block-comment-tokens = { start = "(*", end = "*)" }
 comment-token = "(**)"
 language-servers = [ "ocamllsp" ]
 indent = { tab-width = 2, unit = "  " }
@@ -1096,6 +1123,7 @@ file-types = ["lua"]
 shebangs = ["lua", "luajit"]
 roots = [".luarc.json", ".luacheckrc", ".stylua.toml", "selene.toml", ".git"]
 comment-token = "--"
+block-comment-tokens = { start = "--[[", end = "--]]" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "lua-language-server" ]
 
@@ -1121,6 +1149,7 @@ scope = "source.vue"
 injection-regex = "vue"
 file-types = ["vue"]
 roots = ["package.json"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "vuels" ]
 
@@ -1148,6 +1177,7 @@ injection-regex = "haskell"
 file-types = ["hs", "hs-boot"]
 roots = ["Setup.hs", "stack.yaml", "cabal.project"]
 comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
 language-servers = [ "haskell-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -1173,6 +1203,7 @@ injection-regex = "purescript"
 file-types = ["purs"]
 roots = ["spago.yaml", "spago.dhall", "bower.json"]
 comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
 language-servers = [ "purescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 auto-format = true
@@ -1227,6 +1258,7 @@ scope = "source.prolog"
 file-types = ["pl", "prolog"]
 shebangs = ["swipl"]
 comment-token = "%"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "swipl" ]
 
 [[language]]
@@ -1246,6 +1278,7 @@ name = "cmake"
 scope = "source.cmake"
 file-types = ["cmake", { glob = "CMakeLists.txt" }]
 comment-token = "#"
+block-comment-tokens = { start = "#[[", end = "]]" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "cmake-language-server" ]
 injection-regex = "cmake"
@@ -1272,6 +1305,7 @@ name = "glsl"
 scope = "source.glsl"
 file-types = ["glsl", "vert", "tesc", "tese", "geom", "frag", "comp" ]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 injection-regex = "glsl"
 
@@ -1309,6 +1343,7 @@ file-types = ["rkt", "rktd", "rktl", "scrbl"]
 shebangs = ["racket"]
 comment-token = ";"
 indent = { tab-width = 2, unit = "  " }
+block-comment-tokens = { start = "#|", end = "|#" }
 language-servers = [ "racket" ]
 grammar = "scheme"
 
@@ -1343,6 +1378,7 @@ name = "wgsl"
 scope = "source.wgsl"
 file-types = ["wgsl"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "wgsl_analyzer" ]
 indent = { tab-width = 4, unit = "    " }
 
@@ -1389,6 +1425,7 @@ name = "tablegen"
 scope = "source.tablegen"
 file-types = ["td"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 injection-regex = "tablegen"
 
@@ -1404,6 +1441,7 @@ file-types = ["md", "markdown", "mkd", "mdwn", "mdown", "markdn", "mdtxt", "mdte
 roots = [".marksman.toml"]
 language-servers = [ "marksman" ]
 indent = { tab-width = 2, unit = "  " }
+block-comment-tokens = { start = "<!--", end = "-->" }
 
 [[grammar]]
 name = "markdown"
@@ -1427,6 +1465,7 @@ file-types = ["dart"]
 roots = ["pubspec.yaml"]
 auto-format = true
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "dart" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -1440,6 +1479,7 @@ scope = "source.scala"
 roots = ["build.sbt", "build.sc", "build.gradle", "build.gradle.kts", "pom.xml", ".scala-build"]
 file-types = ["scala", "sbt", "sc"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "metals" ]
 
@@ -1560,6 +1600,8 @@ scope = "source.graphql"
 injection-regex = "graphql"
 file-types = ["gql", "graphql", "graphqls"]
 language-servers = [ "graphql-language-service" ]
+comment-token = "#"
+block-comment-tokens = { start = "\"\"\"", end = "\"\"\"" }
 indent = { tab-width = 2, unit = "  " }
 
 [[grammar]]
@@ -1574,6 +1616,7 @@ file-types = ["elm"]
 roots = ["elm.json"]
 auto-format = true
 comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
 language-servers = [ "elm-language-server" ]
 indent = { tab-width = 4, unit = "    " }
 
@@ -1586,6 +1629,7 @@ name = "iex"
 scope = "source.iex"
 injection-regex = "iex"
 file-types = ["iex"]
+comment-token = "#"
 
 [[grammar]]
 name = "iex"
@@ -1599,6 +1643,7 @@ file-types = ["res"]
 roots = ["bsconfig.json"]
 auto-format = true
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "rescript-language-server" ]
 indent = { tab-width = 2, unit = "  " }
 
@@ -1635,6 +1680,7 @@ scope = "source.kotlin"
 file-types = ["kt", "kts"]
 roots = ["settings.gradle", "settings.gradle.kts"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 language-servers = [ "kotlin-language-server" ]
 
@@ -1649,6 +1695,7 @@ injection-regex = "(hcl|tf|nomad)"
 language-id = "terraform"
 file-types = ["hcl", "tf", "nomad"]
 comment-token = "#"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "terraform-ls" ]
 auto-format = true
@@ -1663,6 +1710,7 @@ scope = "source.tfvars"
 language-id = "terraform-vars"
 file-types = ["tfvars"]
 comment-token = "#"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "terraform-ls" ]
 auto-format = true
@@ -1685,6 +1733,7 @@ scope = "source.sol"
 injection-regex = "(sol|solidity)"
 file-types = ["sol"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 language-servers = [ "solc" ]
 
@@ -1713,6 +1762,7 @@ scope = "source.ron"
 injection-regex = "ron"
 file-types = ["ron"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 
 [[grammar]]
@@ -1754,6 +1804,7 @@ injection-regex = "(r|R)md"
 file-types = ["rmd", "Rmd"]
 indent = { tab-width = 2, unit = "  " }
 grammar = "markdown"
+block-comment-tokens = { start = "<!--", end = "-->" }
 language-servers = [ "r" ]
 
 [[language]]
@@ -1763,6 +1814,7 @@ injection-regex = "swift"
 file-types = ["swift"]
 roots = [ "Package.swift" ]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 auto-format = true
 language-servers = [ "sourcekit-lsp" ]
 
@@ -1775,6 +1827,7 @@ name = "erb"
 scope = "text.html.erb"
 injection-regex = "erb"
 file-types = ["erb"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 grammar = "embedded-template"
 
@@ -1783,6 +1836,7 @@ name = "ejs"
 scope = "text.html.ejs"
 injection-regex = "ejs"
 file-types = ["ejs"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 grammar = "embedded-template"
 
@@ -1796,6 +1850,7 @@ scope = "source.eex"
 injection-regex = "eex"
 file-types = ["eex"]
 roots = ["mix.exs", "mix.lock"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 
 [[grammar]]
@@ -1808,6 +1863,7 @@ scope = "source.heex"
 injection-regex = "heex"
 file-types = ["heex"]
 roots = ["mix.exs", "mix.lock"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "elixir-ls" ]
 
@@ -1820,6 +1876,7 @@ name = "sql"
 scope = "source.sql"
 file-types = ["sql", "dsql"]
 comment-token = "--"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 injection-regex = "sql"
 
@@ -1878,6 +1935,7 @@ scope = "source.vala"
 injection-regex = "vala"
 file-types = ["vala", "vapi"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "vala-language-server" ]
 
@@ -1903,6 +1961,7 @@ scope = "source.devicetree"
 injection-regex = "(dtsi?|devicetree|fdt)"
 file-types = ["dts", "dtsi"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "\t" }
 
 [[grammar]]
@@ -1941,6 +2000,7 @@ file-types = ["odin"]
 roots = ["ols.json"]
 language-servers = [ "ols" ]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "\t" }
 formatter = { command = "odinfmt", args = [ "-stdin", "true" ] }
 
@@ -1998,6 +2058,7 @@ roots = ["v.mod"]
 language-servers = [ "vlang-language-server" ]
 auto-format = true
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "\t" }
 
 [[grammar]]
@@ -2009,6 +2070,7 @@ name = "verilog"
 scope = "source.verilog"
 file-types = ["v", "vh", "sv", "svh"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "svlangserver" ]
 indent = { tab-width = 2, unit = "  " }
 injection-regex = "verilog"
@@ -2045,6 +2107,7 @@ scope = "source.openscad"
 injection-regex = "openscad"
 file-types = ["scad"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "openscad-lsp" ]
 indent = { tab-width = 2, unit = "\t" }
 
@@ -2109,6 +2172,7 @@ injection-regex = "idr"
 file-types = ["idr"]
 shebangs = []
 comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "idris2-lsp" ]
 
@@ -2144,6 +2208,7 @@ scope = "source.dot"
 injection-regex = "dot"
 file-types = ["dot"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 language-servers = [ "dot-language-server" ]
 
@@ -2173,6 +2238,7 @@ scope = "source.slint"
 injection-regex = "slint"
 file-types = ["slint"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 language-servers = [ "slint-lsp" ]
 
@@ -2222,6 +2288,7 @@ scope = "source.pascal"
 injection-regex = "pascal"
 file-types = ["pas", "pp", "inc", "lpr", "lfm"]
 comment-token = "//"
+block-comment-tokens = { start = "{", end = "}" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "pasls" ]
 
@@ -2234,7 +2301,7 @@ name = "sml"
 scope = "source.sml"
 injection-regex = "sml"
 file-types = ["sml"]
-comment-token = "(*"
+block-comment-tokens = { start = "(*", end = "*)" }
 
 [[grammar]]
 name = "sml"
@@ -2246,6 +2313,7 @@ scope = "source.jsonnet"
 file-types = ["libsonnet", "jsonnet"]
 roots = ["jsonnetfile.json"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "jsonnet-language-server" ]
 
@@ -2258,6 +2326,7 @@ name = "astro"
 scope = "source.astro"
 injection-regex = "astro"
 file-types = ["astro"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 
 [[grammar]]
@@ -2281,6 +2350,7 @@ source = { git = "https://github.com/vito/tree-sitter-bass", rev = "501133e260d7
 name = "wat"
 scope = "source.wat"
 comment-token = ";;"
+block-comment-tokens = { start = "(;", end = ";)" }
 file-types = ["wat"]
 
 [[grammar]]
@@ -2291,6 +2361,7 @@ source = { git = "https://github.com/wasm-lsp/tree-sitter-wasm", rev = "2ca28a9f
 name = "wast"
 scope = "source.wast"
 comment-token = ";;"
+block-comment-tokens = { start = "(;", end = ";)" }
 file-types = ["wast"]
 
 [[grammar]]
@@ -2302,6 +2373,7 @@ name = "d"
 scope = "source.d"
 file-types = [ "d", "dd" ]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 injection-regex = "d"
 indent = { tab-width = 4, unit = "    "}
 language-servers = [ "serve-d" ]
@@ -2328,6 +2400,7 @@ name = "kdl"
 scope = "source.kdl"
 file-types = ["kdl"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 injection-regex = "kdl"
 
 [[grammar]]
@@ -2398,6 +2471,7 @@ file-types = [
   "musicxml",
   "glif"
 ]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 
 [language.auto-pairs]
@@ -2437,6 +2511,7 @@ scope = "source.wit"
 injection-regex = "wit"
 file-types = ["wit"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = "  " }
 
 [language.auto-pairs]
@@ -2501,6 +2576,7 @@ scope = "source.bicep"
 file-types = ["bicep"]
 auto-format = true
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 2, unit = " "}
 language-servers = [ "bicep-langserver" ]
 
@@ -2513,6 +2589,8 @@ name = "qml"
 scope = "source.qml"
 file-types = ["qml"]
 language-servers = [ "qmlls" ]
+comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 indent = { tab-width = 4, unit = "    " }
 grammar = "qmljs"
 
@@ -2552,6 +2630,7 @@ injection-regex = "pony"
 roots = ["corral.json", "lock.json"]
 indent = { tab-width = 2, unit = "  " }
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 
 [[grammar]]
 name = "ponylang"
@@ -2563,6 +2642,7 @@ scope = "source.dhall"
 injection-regex = "dhall"
 file-types = ["dhall"]
 comment-token = "--"
+block-comment-tokens = { start = "{-", end = "-}" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "dhall-lsp-server" ]
 formatter = { command = "dhall" , args = ["format"] }
@@ -2586,6 +2666,7 @@ scope = "source.msbuild"
 injection-regex = "msbuild"
 file-types = ["proj", "vbproj", "csproj", "fsproj", "targets", "props"]
 indent = { tab-width = 2, unit = "  " }
+block-comment-tokens = { start = "<!--", end = "-->" }
 grammar = "xml"
 
 [language.auto-pairs]
@@ -2632,7 +2713,7 @@ scope = "source.tal"
 injection-regex = "tal"
 file-types = ["tal"]
 auto-format = false
-comment-token = "("
+block-comment-tokens = { start = "(", end = ")" }
 
 [[grammar]]
 name = "uxntal"
@@ -2766,6 +2847,7 @@ injection-regex = "nim"
 file-types = ["nim", "nims", "nimble"]
 shebangs = []
 comment-token = "#"
+block-comment-tokens = { start = "#[", end = "]#" }
 indent = { tab-width = 2, unit = "  " }
 language-servers = [ "nimlangserver" ]
 
@@ -2805,6 +2887,7 @@ source = { git = "https://github.com/pfeiferj/tree-sitter-hurl", rev = "264c4206
 [[language]]
 name = "markdoc"
 scope = "text.markdoc"
+block-comment-tokens = { start = "<!--", end = "-->" }
 file-types = ["mdoc"]
 language-servers = [ "markdoc-ls" ]
 
@@ -2858,6 +2941,7 @@ scope = "source.blueprint"
 injection-regex = "blueprint"
 file-types = ["blp"]
 comment-token = "//"
+block-comment-tokens = { start = "/*", end = "*/" }
 language-servers = [ "blueprint-compiler" ]
 indent = { tab-width = 4, unit = "    " }
 
@@ -2910,6 +2994,7 @@ name = "webc"
 scope = "text.html.webc"
 injection-regex = "webc"
 file-types = ["webc"]
+block-comment-tokens = { start = "<!--", end = "-->" }
 indent = { tab-width = 2, unit = "  " }
 grammar = "html"