(tex-fontify-script)

(tex-font-script-display): New variables to make display of
superscripts and subscripts customizable.
(tex-font-lock-suscript, tex-font-lock-match-suscript): Use them.

1 files changed, 20 insertions, 4 deletions

diff --git a/lisp/textmodes/tex-mode.el b/lisp/textmodes/tex-mode.el
index 5757100468b..034caeee702 100644
--- a/lisp/textmodes/tex-mode.el
+++ b/lisp/textmodes/tex-mode.el
@@ -243,6 +243,21 @@ Normally set to either `plain-tex-mode' or `latex-mode'."
   :options '("''" "\">" "\"'" ">>" "»")
   :group 'tex)
 
+(defcustom tex-fontify-script t
+  "If non-nil, fontify subscript and superscript strings."
+  :type 'boolean
+  :group 'tex)
+(put 'tex-fontify-script 'safe-local-variable 'booleanp)
+
+(defcustom tex-font-script-display '(-0.3 . 0.3)
+  "Display specification for subscript and superscript content.
+The car is used for subscript, the cdr is used for superscripts."
+  :group 'tex
+  :type '(cons (choice (float :tag "Subscript")
+                       (const :tag "No lowering" nil))
+               (choice (float :tag "Superscript")
+                       (const :tag "No raising" nil))))
+
 (defvar tex-last-temp-file nil
   "Latest temporary file generated by \\[tex-region] and \\[tex-buffer].
 Deleted when the \\[tex-region] or \\[tex-buffer] is next run, or when the
@@ -593,13 +608,14 @@ An alternative value is \" . \", if you use a font with a narrow period."
                   (setq pos (1- pos) odd (not odd)))
                 odd))
     (if (eq (char-after pos) ?_)
-        '(face subscript display (raise -0.3))
-      '(face superscript display (raise +0.3)))))
+        `(face subscript display (raise ,(car tex-font-script-display)))
+      `(face superscript display (raise ,(cdr tex-font-script-display))))))
 
 (defun tex-font-lock-match-suscript (limit)
   "Match subscript and superscript patterns up to LIMIT."
-  (when (re-search-forward "[_^] *\\([^\n\\{}]\\|\
-\\\\\\([a-zA-Z@]+\\|[^ \t\n]\\)\\|\\({\\)\\)" limit t)
+  (when (and tex-fontify-script
+             (re-search-forward "[_^] *\\([^\n\\{}]\\|\
+\\\\\\([a-zA-Z@]+\\|[^ \t\n]\\)\\|\\({\\)\\)" limit t))
     (when (match-end 3)
       (let ((beg (match-beginning 3))
             (end (save-restriction