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| | ;;; toml-ts-mode.el --- tree-sitter support for TOML -*- lexical-binding: t; -*-
;; Copyright (C) 2022 Free Software Foundation, Inc.
;; Author : Jostein Kjønigsen <jostein@kjonigsen.net>
;; Maintainer : Jostein Kjønigsen <jostein@kjonigsen.net>
;; Created : December 2022
;; Keywords : toml languages tree-sitter
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'treesit)
(declare-function treesit-parser-create "treesit.c")
(declare-function treesit-induce-sparse-tree "treesit.c")
(declare-function treesit-node-start "treesit.c")
(declare-function treesit-node-child-by-field-name "treesit.c")
(defvar toml-ts-mode--font-lock-settings
(treesit-font-lock-rules
:language 'toml
:feature 'constant
'((boolean) @font-lock-constant-face)
:language 'toml
:feature 'delimiter
'((["="]) @font-lock-delimiter-face)
:language 'toml
:feature 'number
'((integer) @font-lock-number-face
(float) @font-lock-number-face
(local_date) @font-lock-number-face
(local_date_time) @font-lock-number-face
(local_time) @font-lock-number-face)
:language 'toml
:feature 'string
'((string) @font-lock-string-face)
:language 'toml
:feature 'escape-sequence
:override t
'((escape_sequence) @font-lock-escape-face)
:language 'toml
:feature 'pair
:override t ; Needed for overriding string face on keys.
'((comment) @font-lock-comment-face
(bare_key) @font-lock-property-face
(quoted_key) @font-lock-property-face
(table ("[" @font-lock-bracket-face
(_) @font-lock-type-face
"]" @font-lock-bracket-face))
(table_array_element ("[[" @font-lock-bracket-face
(_) @font-lock-type-face
"]]" @font-lock-bracket-face))
(table (quoted_key) @font-lock-type-face)
(table (dotted_key (quoted_key)) @font-lock-type-face))
:language 'toml
:feature 'error
:override t
'((ERROR) @font-lock-warning-face))
"Font-lock settings for TOML.")
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.toml\\'" . toml-ts-mode))
;;;###autoload
(define-derived-mode toml-ts-mode prog-mode "TOML"
"Major mode for editing TOML, powered by tree-sitter."
:group 'toml-mode
(unless (treesit-ready-p 'toml)
(error "Tree-sitter for TOML isn't avilable"))
(treesit-parser-create 'toml)
;; Comments
(setq-local comment-start "# ")
(setq-local commend-end "")
;; Navigation.
(setq-local treesit-defun-type-regexp
(rx (or "table" "table_array_element")))
;; Font-lock.
(setq-local treesit-font-lock-settings toml-ts-mode--font-lock-settings)
(setq-local treesit-font-lock-feature-list
'((constant number pair string)
(escape-sequence)
(delimiter error)))
;; Imenu.
;; (setq-local imenu-create-index-function #'toml-ts-mode--imenu)
;; (setq-local which-func-functions nil) ;; Piggyback on imenu
(treesit-major-mode-setup))
(provide 'toml-ts-mode)
;;; toml-ts-mode.el ends here
|