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authorKyle Meyer <kyle@kyleam.com>2020-02-21 00:42:38 -0500
committerKyle Meyer <kyle@kyleam.com>2020-02-21 22:19:39 -0500
commit5d5bb0109f6a84c0c191559ab71670fae4650e6a (patch)
tree8aeff9e43f2d8d67a7712a72bfa8003a05eabf43
parent8e8db653aa3a1ddf0afd19f2eea8656ce6c76c61 (diff)
downloadsnakemake-mode-5d5bb0109f6a84c0c191559ab71670fae4650e6a.tar.gz
font-lock: Adjust python-font-lock-keywords handling for Emacs 27
In Emacs 27, specifically 36b64e087e (Add 'font-lock-maximum-decoration' levels for Python, 2018-07-19), python-font-lock-keywords was changed to a list of symbols that define different fontification levels, so we can no longer simply tack snakemake-font-lock-keywords onto it. Instead define a set of levels that mirrors Python mode's. For Snakemake mode, the same decoration is used for all levels, but at least we will honor the level of decoration that the user has set for Python. Reported-by: Nicholas Knoblauch <nwknoblauch@gmail.com> Closes #29.
-rw-r--r--NEWS3
-rw-r--r--snakemake-mode.el23
2 files changed, 24 insertions, 2 deletions
diff --git a/NEWS b/NEWS
index bc2fc12..8b7e817 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,9 @@ NEWS -- history of user-visible changes -*- mode: org; -*-
- The 'multiext' built-in (new in Snakemake v5.8.2) is now recognized.
+- The font-lock handling has been updated to be compatible with
+ python.el changes in Emacs 27.
+
* v1.6.0
- Checkpoints (new in Snakemake v5.4) are now recognized.
diff --git a/snakemake-mode.el b/snakemake-mode.el
index 7987304..255985c 100644
--- a/snakemake-mode.el
+++ b/snakemake-mode.el
@@ -446,8 +446,27 @@ embedded R, you need to set mmm-global-mode to a non-nil value such as 'maybe.")
1 font-lock-keyword-face)
(,(snakemake-rx (group sm-builtin)) 1 font-lock-builtin-face)))
-(defvar snakemake-font-lock-keywords
- (append snakemake--font-lock-keywords python-font-lock-keywords))
+(if (bound-and-true-p python-font-lock-keywords-level-1)
+ (with-no-warnings
+ ;; In Emacs 27 `python-font-lock-keywords' was split up into
+ ;; different decoration levels.
+ (defvar snakemake-font-lock-keywords-level-1
+ (append snakemake--font-lock-keywords
+ python-font-lock-keywords-level-1))
+ (defvar snakemake-font-lock-keywords-level-2
+ (append snakemake--font-lock-keywords
+ python-font-lock-keywords-level-2))
+ (defvar snakemake-font-lock-keywords-maximum-decoration
+ (append snakemake--font-lock-keywords
+ python-font-lock-keywords-maximum-decoration))
+ (defvar snakemake-font-lock-keywords
+ ;; Mirrors `python-font-lock-keywords'.
+ '(snakemake-font-lock-keywords-level-1
+ snakemake-font-lock-keywords-level-1
+ snakemake-font-lock-keywords-level-2
+ snakemake-font-lock-keywords-maximum-decoration)))
+ (defvar snakemake-font-lock-keywords
+ (append snakemake--font-lock-keywords python-font-lock-keywords)))
;;;###autoload
(define-derived-mode snakemake-mode python-mode "Snakemake"