>From f5a4ad71152bee3c2ad15aa4d08b625d61bc6e9c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?K=C3=A9vin=20Le=20Gouguec?= Date: Sun, 12 May 2019 18:36:09 +0200 Subject: [PATCH 1/2] Stop splicing anonymous faces in font-lock-append-text-property This is the same fix as f478082, which was only applied to font-lock-prepend-text-property. * lisp/font-lock.el (font-lock-append-text-property): Distinguish list of faces from property list. * test/lisp/font-lock-tests.el: New test suite. (Bug#35476) --- lisp/font-lock.el | 7 +++++- test/lisp/font-lock-tests.el | 43 ++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) create mode 100644 test/lisp/font-lock-tests.el diff --git a/lisp/font-lock.el b/lisp/font-lock.el index 7ff4e606fa..95ca2f99c2 100644 --- a/lisp/font-lock.el +++ b/lisp/font-lock.el @@ -1417,7 +1417,12 @@ font-lock-append-text-property Arguments PROP and VALUE specify the property and value to append to the value already in place. The resulting property values are always lists. Optional argument OBJECT is the string or buffer containing the text." - (let ((val (if (listp value) value (list value))) next prev) + (let ((val (if (and (listp value) (not (keywordp (car value)))) + ;; Already a list of faces. + value + ;; A single face (e.g. a plist of face properties). + (list value))) + next prev) (while (/= start end) (setq next (next-single-property-change start prop object end) prev (get-text-property start prop object)) diff --git a/test/lisp/font-lock-tests.el b/test/lisp/font-lock-tests.el new file mode 100644 index 0000000000..ad282f6cad --- /dev/null +++ b/test/lisp/font-lock-tests.el @@ -0,0 +1,43 @@ +;;; font-lock-tests.el --- Test suite for font-lock. -*- lexical-binding: t -*- + +;; Copyright (C) 2019 Free Software Foundation, Inc. + +;; 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 . + +;;; Code: +(require 'ert) + +(ert-deftest font-lock-test-append-anonymous-face () + "Ensure `font-lock-append-text-property' does not splice anonymous faces." + (with-temp-buffer + (insert "foo") + (add-text-properties 1 3 '(face italic)) + (font-lock-append-text-property 1 3 'face '(:strike-through t)) + (should (equal (get-text-property 1 'face (current-buffer)) + '(italic (:strike-through t)))))) + +(ert-deftest font-lock-test-prepend-anonymous-face () + "Ensure `font-lock-prepend-text-property' does not splice anonymous faces." + (with-temp-buffer + (insert "foo") + (add-text-properties 1 3 '(face italic)) + (font-lock-prepend-text-property 1 3 'face '(:strike-through t)) + (should (equal (get-text-property 1 'face (current-buffer)) + '((:strike-through t) italic))))) + +(provide 'font-lock-tests) + +;; font-lock-tests.el ends here -- 2.20.1