[elpa] externals/auctex a4a8140 2/4: Refresh font-latex fontification if vars are modified

[Tassilo Horn]

branch: externals/auctex
commit a4a8140a683bd0b46ffe51f923a73959be4cc05c
Author: Tassilo Horn <address@hidden>
Commit: Tassilo Horn <address@hidden>

    Refresh font-latex fontification if vars are modified
    
    Refresh font-latex fontification if variables such as
    LaTeX-verbatim-*-local are set in a file-local variables block or as
    directory-local variables (bug#24868).
    
    * font-latex.el (font-latex-after-hacking-local-variables): New function.
    (font-latex-setup): Add it do hack-local-variables-hook.
    * tex.el (TeX--list-of-string-p): New function.
    * latex.el (LaTeX-verbatim-environments-local):
    (LaTeX-verbatim-macros-with-braces-local):
    (LaTeX-verbatim-macros-with-delims-local): Use it for
    safe-local-variable property.
---
 font-latex.el |   24 +++++++++++++++++++++++-
 latex.el      |    7 +++++++
 tex.el        |   10 ++++++++++
 3 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/font-latex.el b/font-latex.el
index fb7f8d6..a7982c5 100644
--- a/font-latex.el
+++ b/font-latex.el
@@ -1258,7 +1258,11 @@ triggers Font Lock to recognize the change."
          (set (make-local-variable 'lookup-syntax-properties) t))
       (setq defaults (append defaults variables)))
     ;; Set the defaults.
-    (setq font-lock-defaults defaults)))
+    (setq font-lock-defaults defaults))
+
+  ;; Make sure fontification will be refreshed if a user sets variables
+  ;; influencing fontification in her file-local variables section.
+  (add-hook 'hack-local-variables-hook 
#'font-latex-after-hacking-local-variables t t))
 
 (defun font-latex-jit-lock-force-redisplay (buf start end)
   "Compatibility for Emacsen not offering `jit-lock-force-redisplay'."
@@ -1343,6 +1347,24 @@ fontification facilities like `font-lock-multiline' 
itself."
          (when (numberp ad-end)
            (ad-set-arg 1 ad-end)))))))
 
+(defun font-latex-after-hacking-local-variables ()
+  "Refresh fontification if required by updates of file-local variables.
+This function is added to `hack-local-variables-hook' and
+recomputes fontification if variables affecting fontification are
+modified.  Such variables include
+`LaTeX-verbatim-environments-local',
+`LaTeX-verbatim-macros-with-braces-local',
+`LaTeX-verbatim-macros-with-delims-local'."
+  ;; Note to self: directory-local variables are also added to
+  ;; file-local-variables-alist.
+  (let ((hacked-local-vars (mapcar #'car file-local-variables-alist)))
+    (when (or (memq 'LaTeX-verbatim-environments-local hacked-local-vars)
+             (memq 'LaTeX-verbatim-macros-with-braces-local hacked-local-vars)
+             (memq 'LaTeX-verbatim-macros-with-delims-local hacked-local-vars))
+      ;; Ok, we need to refresh fontification.
+      (font-latex-set-syntactic-keywords)
+      (setq font-lock-set-defaults nil)
+      (font-lock-set-defaults))))
 
 ;;; Utility functions
 
diff --git a/latex.el b/latex.el
index c21699d..56cb491 100644
--- a/latex.el
+++ b/latex.el
@@ -2785,6 +2785,9 @@ Programs should not use this variable directly but the 
function
 including values of the variable
 `LaTeX-verbatim-macros-with-delims' as well.")
 (make-variable-buffer-local 'LaTeX-verbatim-macros-with-delims-local)
+(put 'LaTeX-verbatim-macros-with-delims-local 'safe-local-variable
+     #'TeX--list-of-string-p)
+
 
 (defcustom LaTeX-verbatim-macros-with-braces nil
   "Macros for inline verbatim with arguments in braces, like \\foo{...}.
@@ -2807,6 +2810,8 @@ Programs should not use this variable directly but the 
function
 including values of the variable
 `LaTeX-verbatim-macros-with-braces' as well.")
 (make-variable-buffer-local 'LaTeX-verbatim-macros-with-braces-local)
+(put 'LaTeX-verbatim-macros-with-braces-local 'safe-local-variable
+     #'TeX--list-of-string-p)
 
 (defcustom LaTeX-verbatim-environments
   '("verbatim" "verbatim*")
@@ -2829,6 +2834,8 @@ Programs should not use this variable directly but the 
function
 `LaTeX-verbatim-environments' which returns a value including
 values of the variable `LaTeX-verbatim-environments' as well.")
 (make-variable-buffer-local 'LaTeX-verbatim-environments-local)
+(put 'LaTeX-verbatim-environments-local 'safe-local-variable
+     #'TeX--list-of-string-p)
 
 (defun LaTeX-verbatim-macros-with-delims ()
   "Return list of verbatim macros with delimiters."
diff --git a/tex.el b/tex.el
index 1836f66..e192899 100644
--- a/tex.el
+++ b/tex.el
@@ -6665,6 +6665,16 @@ Emacs 21."
          (string-to-number (replace-match "\\1" nil nil string))
        0))))
 
+(defun TeX--list-of-string-p (lst)
+  "Return non-nil iff `LST' is a list of strings.
+Used as function for validating a variable's `safe-local-variable' property."
+  (and (listp lst)
+       (let ((all-strings t))
+        (while (and all-strings lst)
+          (setq all-strings (stringp (car lst)))
+          (setq lst (cdr lst)))
+        all-strings)))
+
 (provide 'tex)
 
 ;; Local Variables: