bug#21568: [PATCH] Add prettify-symbols-alist for js-mode

[Xue Fuqiao <xfq.free@gmail.com>]

On Sat, Sep 26, 2015 at 11:59 PM, Simen Heggestøyl <simenheg@gmail.com> wrote:
> Alright. Better?

LGTM.  WDYT, Dmitry and Daniel?

BTW, Dmitry, maybe you can also apply it to js2-mode.

> From a51d8ceaa7e6114cf775a4f01e16a7cf1403e075 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Simen=20Heggest=C3=B8yl?= <simenheg@gmail.com>
> Date: Wed, 23 Sep 2015 21:49:24 +0200
> Subject: [PATCH] Add prettify-symbols-alist for js-mode
>
> * lisp/progmodes/js.el (js--prettify-symbols-alist): New defconst.
> (js-mode): Use it.
> ---
>  lisp/progmodes/js.el | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
> index 6a800f8..ab994f3 100644
> --- a/lisp/progmodes/js.el
> +++ b/lisp/progmodes/js.el
> @@ -1724,6 +1724,12 @@ This performs fontification according to
> `js--class-styles'."
>             (js-syntax-propertize-regexp end))))))
>     (point) end))
>
> +(defconst js--prettify-symbols-alist
> +  '(("=>" . ?⇒)
> +    (">=" . ?≥)
> +    ("<=" . ?≤))
> +  "Alist of symbol prettifications for JavaScript.")
> +
>  ;;; Indentation
>
>  (defconst js--possibly-braceless-keyword-re
> @@ -3495,6 +3501,7 @@ If one hasn't been set, or if it's stale, prompt for a
> new one."
>    (setq-local open-paren-in-column-0-is-defun-start nil)
>    (setq-local font-lock-defaults (list js--font-lock-keywords))
>    (setq-local syntax-propertize-function #'js-syntax-propertize)
> +  (setq-local prettify-symbols-alist js--prettify-symbols-alist)
>
>    (setq-local parse-sexp-ignore-comments t)
>    (setq-local parse-sexp-lookup-properties t)
> @@ -3564,4 +3571,8 @@ If one hasn't been set, or if it's stale, prompt for a
> new one."
>
>  (provide 'js)
>
> +;; Local Variables:
> +;; coding: utf-8
> +;; End:
> +
>  ;; js.el ends here
> --
> 2.5.3
>