140 lines
3.7 KiB
EmacsLisp
140 lines
3.7 KiB
EmacsLisp
;;; kdl-ts-mode.el --- Tree-sitter support for KDL -*- lexical-binding: t; -*-
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;; Copyright (C) 2024 dataphract
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;; Homepage : https://github.com/dataphract/kdl-ts-mode
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;; Version : 0.1
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;; Author : dataphract <dataphract@gmail.com>
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;; Maintainer : dataphract <dataphract@gmail.com>
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;; Created : January 2024
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;; Keywords : kdl languages tree-sitter
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;; Package-Requires: ((emacs "29.1"))
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;;; Commentary:
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;; This package provides a major mode for editing KDL files, powered by tree-sitter.
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;;; Code:
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(require 'treesit)
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(declare-function treesit-parser-create "treesit.c")
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(defcustom kdl-ts-mode-indent-offset 2
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"Number of spaces for each indentation step in `kdl-ts-mode'."
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:version "29.1"
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:type 'integer
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:safe 'integerp
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:group 'kdl)
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(defvar kdl-ts-mode--syntax-table
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(let ((table (make-syntax-table)))
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(modify-syntax-entry ?= "." table)
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(modify-syntax-entry ?/ ". 124" table)
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(modify-syntax-entry ?* ". 23b" table)
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(modify-syntax-entry ?\n ">" table)
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table)
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"Syntax table for `kdl-ts-mode'.")
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(defvar kdl-ts-mode--indent-rules
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'((kdl
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((parent-is "source_file") column-0 0)
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((node-is "}") (and parent parent-bol) 0)
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((parent-is "node_children") parent-bol kdl-ts-mode-indent-offset)))
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"Tree-sitter indent rules for `kdl-ts-mode'.")
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;; Syntax highlighting
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(defvar kdl-ts-mode--font-lock-settings
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(treesit-font-lock-rules
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:language 'kdl
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:feature 'bracket
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'((["(" ")" "{" "}"]) @font-lock-bracket-face)
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:language 'kdl
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:feature 'comment
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'((single_line_comment) @font-lock-comment-face
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(multi_line_comment) @font-lock-comment-face)
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:language 'kdl
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:feature 'constant
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'("null" @font-lock-constant-face
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(boolean) @font-lock-constant-face)
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:language 'kdl
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:feature 'number
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'((number) @font-lock-number-face)
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:language 'kdl
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:feature 'type
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'((type) @font-lock-type-face)
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:language 'kdl
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:feature 'string
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:override t
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'((string) @font-lock-string-face)
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:language 'kdl
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:feature 'escape-sequence
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:override t
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'((escape) @font-lock-escape-face)
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:language 'kdl
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:feature 'node
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:override t
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'((node (identifier) @font-lock-function-call-face))
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:language 'kdl
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:feature 'property
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:override t
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'((prop (identifier) @font-lock-property-use-face))
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:language 'kdl
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:feature 'error
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:override t
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'((ERROR) @font-lock-warning-face)
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:language 'kdl
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:feature 'comment
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:override t
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'((node (node_comment)) @font-lock-comment-face
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(node (node_field (node_field_comment)) @font-lock-comment-face)
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(node_children (node_children_comment)) @font-lock-comment-face))
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"Tree-sitter font-lock settings for `kdl-ts-mode'.")
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;;;###autoload
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(define-derived-mode kdl-ts-mode prog-mode "KDL"
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"Major mode for editing KDL, powered by tree-sitter."
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:group 'kdl
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:syntax-table kdl-ts-mode--syntax-table
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(when (treesit-ready-p 'kdl)
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(treesit-parser-create 'kdl)
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(setq-local comment-start "//")
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(setq-local comment-end "")
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(setq-local indent-tabs-mode nil
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treesit-simple-indent-rules kdl-ts-mode--indent-rules)
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(setq-local treesit-font-lock-settings kdl-ts-mode--font-lock-settings)
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(setq-local treesit-font-lock-feature-list
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'((comment)
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(string type)
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(constant escape-sequence number node property)
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(bracket
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;delimiter
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error
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;misc-punctuation
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)))
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(treesit-major-mode-setup)))
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(if (treesit-ready-p 'kdl)
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(add-to-list 'auto-mode-alist '("\\.kdl\\'" . kdl-ts-mode)))
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(provide 'kdl-ts-mode)
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;;; kdl-ts-mode.el ends here
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