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WIP: Add treesit font-lock support #495

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WIP: Add treesit font-lock support #495

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015f046
Add font-lock tree-sitter support
wkirschbaum Oct 17, 2022
fe8eff4
Ensure elixir-tree-sitter does not load for older versions of emacs
wkirschbaum Oct 17, 2022
12e3077
Check if tree-sitter language 'elixir is present
wkirschbaum Oct 18, 2022
a26f5ce
Update tree-sitter mode with imenu and improved fonts
wkirschbaum Oct 23, 2022
49d9dcc
feat: support heex sigil
dustinfarris Aug 9, 2022
44c6dae
Merge remote-tracking branch 'origin/master'
wkirschbaum Oct 23, 2022
34cc558
Remove validate defun query when compile
wkirschbaum Oct 23, 2022
0e16d22
Ensure treesit-font-lock is enabled
wkirschbaum Oct 23, 2022
5420cf1
Use new treesit-major-mode
wkirschbaum Nov 7, 2022
59319f4
Break out treesit features
wkirschbaum Nov 7, 2022
1552160
Update treesit configuration to match latest changes
wkirschbaum Nov 22, 2022
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43 changes: 37 additions & 6 deletions elixir-mode.el
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,13 @@
"Hook that runs when switching to major mode"
:type 'hook)

(defcustom elixir-use-tree-sitter nil
"If non-nil, `elixir-mode' tries to use tree-sitter.
Currently `elixir-mode' uses tree-sitter for font-locking, imenu,
and movement functions."
:type 'boolean
:version "29.1")

(defvar elixir-mode-map
(let ((map (make-sparse-keymap)))
map)
Expand Down Expand Up @@ -562,21 +569,42 @@ just return nil."
["Elixir homepage" elixir-mode-open-elixir-home]
["About" elixir-mode-version]))

(defun elixir--treesit-setup ()
"Ensure tree-sitter can be used."
(progn
(require 'elixir-tree-sitter)

(setq-local treesit-mode-supported t)
(setq-local treesit-required-languages '(elixir))
(setq-local treesit-font-lock-settings elixir--treesit-font-lock-settings)
(setq-local treesit-font-lock-feature-list
'(( comment string )
( keyword unary-operator operator doc)
( call constant )
( sigil string-escape)
( string-interpolation )))

(setq-local treesit-imenu-function #'elixir--imenu-treesit-create-index)
(cond
((treesit-ready-p 'elixir)
(treesit-major-mode-setup))
(t
(message "Tree-sitter for Elixir isn't available")))))

;;;###autoload
(define-derived-mode elixir-mode prog-mode "Elixir"
:group 'elixir
"Major mode for editing Elixir code.

\\{elixir-mode-map}"
(setq-local font-lock-defaults
'(elixir-font-lock-keywords
nil nil nil nil
(font-lock-syntactic-face-function
. elixir-font-lock-syntactic-face-function)))

(setq-local comment-start "# ")
(setq-local comment-end "")
(setq-local comment-start-skip "#+ *")
(setq-local comment-use-syntax t)

(setq-local syntax-propertize-function #'elixir-syntax-propertize-function)

(setq-local imenu-generic-expression elixir-imenu-generic-expression)

(setq-local beginning-of-defun-function #'elixir-beginning-of-defun)
Expand All @@ -587,7 +615,10 @@ just return nil."
:backward-token 'elixir-smie-backward-token)
;; https://github.com/elixir-editors/emacs-elixir/issues/363
;; http://debbugs.gnu.org/cgi/bugreport.cgi?bug=35496
(setq-local smie-blink-matching-inners nil))
(setq-local smie-blink-matching-inners nil)

(if (<= 29 emacs-major-version)
(elixir--treesit-setup)))

;; Invoke elixir-mode when appropriate

Expand Down
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