From d69e9f1c24f37f36af33b0468c5a4e100dbb09b6 Mon Sep 17 00:00:00 2001 From: Alan Mackenzie Date: Sun, 1 Feb 2015 21:20:35 +0000 Subject: [PATCH] CC Mode: Stop Font Lock forcing fontification from BOL. Fixes debbugs#19669. cc-mode.el (c-font-lock-init): Setq font-lock-extend-region-functions to nil. --- lisp/ChangeLog | 8 ++++++++ lisp/progmodes/cc-mode.el | 8 ++++++++ 2 files changed, 16 insertions(+) diff --git a/lisp/ChangeLog b/lisp/ChangeLog index fd54c688640..2d4f71f6cec 100644 --- a/lisp/ChangeLog +++ b/lisp/ChangeLog @@ -1,3 +1,11 @@ +2015-02-01 Alan Mackenzie + + CC Mode: Stop Font Lock forcing fontification from BOL. Fixes + debbugs#19669. + + * progmodes/cc-mode.el (c-font-lock-init): Setq + font-lock-extend-region-functions to nil. + 2015-01-31 Alan Mackenzie Handle "#" operator properly inside macro. Fix coding bug. diff --git a/lisp/progmodes/cc-mode.el b/lisp/progmodes/cc-mode.el index 1cba5027f28..50a700425bf 100644 --- a/lisp/progmodes/cc-mode.el +++ b/lisp/progmodes/cc-mode.el @@ -1237,6 +1237,14 @@ This function is called from `c-common-init', once per mode initialization." (font-lock-mark-block-function . c-mark-function))) + ;; Prevent `font-lock-default-fontify-region' extending the region it will + ;; fontify to whole lines by removing `font-lock-extend-region-whole-lines' + ;; (and, coincidentally, `font-lock-extend-region-multiline' (which we do + ;; not need)) from `font-lock-extend-region-functions'. (Emacs only). This + ;; fixes Emacs bug #19669. + (when (boundp 'font-lock-extend-region-functions) + (setq font-lock-extend-region-functions nil)) + (make-local-variable 'font-lock-fontify-region-function) (setq font-lock-fontify-region-function 'c-font-lock-fontify-region) -- 2.39.2