feat: add mermaid

4 files changed, 189 insertions, 0 deletions

diff --git a/README.md b/README.md
index f06792b93..a72c5e20b 100644
--- a/README.md
+++ b/README.md
@@ -249,6 +249,7 @@ We are looking for maintainers to add more parsers and to write query files for
 - [x] [markdown](https://github.com/MDeiml/tree-sitter-markdown) (experimental, maintained by @MDeiml)
 - [x] [markdown_inline](https://github.com/MDeiml/tree-sitter-markdown) (experimental, maintained by @MDeiml)
 - [x] [menhir](https://github.com/Kerl13/tree-sitter-menhir) (maintained by @Kerl13)
+- [ ] [mermaid](https://github.com/monaqa/tree-sitter-mermaid) (experimental)
 - [x] [meson](https://github.com/Decodetalkers/tree-sitter-meson) (maintained by @Decodetalkers)
 - [ ] [nickel](https://github.com/nickel-lang/tree-sitter-nickel)
 - [x] [ninja](https://github.com/alemuller/tree-sitter-ninja) (maintained by @alemuller)
diff --git a/lockfile.json b/lockfile.json
index 117750ec4..3b13d6063 100644
--- a/lockfile.json
+++ b/lockfile.json
@@ -230,6 +230,9 @@
   "menhir": {
     "revision": "db7953acb0d5551f207373c81fa07a57d7b085cb"
   },
+  "mermaid": {
+    "revision": "d787c66276e7e95899230539f556e8b83ee16f6d"
+  },
   "meson": {
     "revision": "153d22588fb5c1eee16a165a084f9ea30f29d941"
   },
diff --git a/lua/nvim-treesitter/parsers.lua b/lua/nvim-treesitter/parsers.lua
index 0ba47880e..0c22f27b2 100644
--- a/lua/nvim-treesitter/parsers.lua
+++ b/lua/nvim-treesitter/parsers.lua
@@ -1314,6 +1314,14 @@ list.jq = {
   },
 }
 
+list.mermaid = {
+  install_info = {
+    url = "https://github.com/monaqa/tree-sitter-mermaid",
+    files = { "src/parser.c" },
+  },
+  experimental = true,
+}
+
 local M = {
   list = list,
   filetype_to_parsername = filetype_to_parsername,
diff --git a/queries/mermaid/highlights.scm b/queries/mermaid/highlights.scm
new file mode 100644
index 000000000..2f3e31b90
--- /dev/null
+++ b/queries/mermaid/highlights.scm
@@ -0,0 +1,177 @@
+; adapted from https://github.com/monaqa/tree-sitter-mermaid
+
+[
+ "sequenceDiagram"
+ "classDiagram"
+ "classDiagram-v2"
+ "stateDiagram"
+ "stateDiagram-v2"
+ "gantt"
+ "pie"
+ "flowchart"
+ "erdiagram"
+
+ "participant"
+ "as"
+ "activate"
+ "deactivate"
+ "note "
+ "over"
+ "link"
+ "links"
+ ; "left of"
+ ; "right of"
+ "properties"
+ "details"
+ "title"
+ "loop"
+ "rect"
+ "opt"
+ "alt"
+ "else"
+ "par"
+ "and"
+ "end"
+ (sequence_stmt_autonumber)
+ (note_placement_left)
+ (note_placement_right)
+
+ "class"
+
+ "state "
+
+ "dateformat"
+ "inclusiveenddates"
+ "topaxis"
+ "axisformat"
+ "includes"
+ "excludes"
+ "todaymarker"
+ "title"
+ "section"
+
+ "direction"
+ "subgraph"
+
+ ] @keyword
+
+(comment) @comment @spell
+
+[
+ ":"
+ (sequence_signal_plus_sign)
+ (sequence_signal_minus_sign)
+
+ (class_visibility_public)
+ (class_visibility_private)
+ (class_visibility_protected)
+ (class_visibility_internal)
+
+ (state_division)
+ ] @punctuation.delimiter
+
+[
+ "("
+ ")"
+ "{"
+ "}"
+ ] @punctuation.bracket
+
+[
+ "-->"
+ (solid_arrow)
+ (dotted_arrow)
+ (solid_open_arrow)
+ (dotted_open_arrow)
+ (solid_cross)
+ (dotted_cross)
+ (solid_point)
+ (dotted_point)
+ ] @operator
+
+[
+ (class_reltype_aggregation)
+ (class_reltype_extension)
+ (class_reltype_composition)
+ (class_reltype_dependency)
+ (class_linetype_solid)
+ (class_linetype_dotted)
+ "&"
+ ] @operator
+
+(sequence_actor) @field
+(class_name) @field
+
+(state_name) @field
+
+(gantt_task_text) @field
+
+[
+ (class_annotation_line)
+ (class_stmt_annotation)
+ (class_generics)
+
+ (state_annotation_fork)
+ (state_annotation_join)
+ (state_annotation_choice)
+ ] @attribute
+
+(directive) @include
+
+(pie_label) @string
+(pie_value) @float
+
+[
+(flowchart_direction_lr)
+(flowchart_direction_rl)
+(flowchart_direction_tb)
+(flowchart_direction_bt)
+ ] @constant
+
+(flow_vertex_id) @field
+
+[
+ (flow_link_arrow)
+ (flow_link_arrow_start)
+ ] @operator
+
+(flow_link_arrowtext "|" @punctuation.bracket)
+
+(flow_vertex_square        [ "[" "]" ]   @punctuation.bracket )
+(flow_vertex_circle        ["((" "))"]   @punctuation.bracket )
+(flow_vertex_ellipse       ["(-" "-)"]   @punctuation.bracket )
+(flow_vertex_stadium       ["([" "])"]   @punctuation.bracket )
+(flow_vertex_subroutine    ["[[" "]]"]   @punctuation.bracket )
+(flow_vertex_rect          ["[|" "|]"]   @punctuation.bracket )
+(flow_vertex_cylinder      ["[(" ")]"]   @punctuation.bracket )
+(flow_vertex_round         ["(" ")"]     @punctuation.bracket )
+(flow_vertex_diamond       ["{" "}"]     @punctuation.bracket )
+(flow_vertex_hexagon       ["{{" "}}"]   @punctuation.bracket )
+(flow_vertex_odd           [">" "]"]     @punctuation.bracket )
+(flow_vertex_trapezoid     ["[/" "\\]"]  @punctuation.bracket )
+(flow_vertex_inv_trapezoid ["[\\" "/]"]  @punctuation.bracket )
+(flow_vertex_leanright     ["[/" "/]"]   @punctuation.bracket )
+(flow_vertex_leanleft      ["[\\" "\\]"] @punctuation.bracket )
+
+(flow_stmt_subgraph ["[" "]"] @punctuation.bracket )
+
+[
+ (er_cardinarity_zero_or_one)
+ (er_cardinarity_zero_or_more)
+ (er_cardinarity_one_or_more)
+ (er_cardinarity_only_one)
+ (er_reltype_non_identifying)
+ (er_reltype_identifying)
+ ] @operator
+
+(er_entity_name) @field
+
+(er_attribute_type) @type
+(er_attribute_name) @field
+
+[
+ (er_attribute_key_type_pk)
+ (er_attribute_key_type_fk)
+ ] @type.qualifier
+
+(er_attribute_comment) @string @spell