bug#17813: 24.3.91; bad linum display with `text-scale-adjust'

[Shigeru Fukaya <shigeru.fukaya@gmail.com>]

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Font size of line numbers by `linum-mode' follow `text-scale-adjust', though
the size of left margin doesn't change.
(nlinum also has the same problem)

The possible solutions are,


(1) To change the width of left margin for line numbers.

[attached patch]


(2) To fix the font size of line numbers.

(set-face-attribute 'linum nil :height (face-attribute 'linum :height nil t))


Solution (2) may need more in case of multi frames with different font size.


Regards,
Shigeru

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--- orig/linum.el	2014-03-21 14:34:40.000000000 +0900
+++ ./linum.el	2014-06-20 02:13:55.023933400 +0900
@@ -178,6 +178,10 @@ Linum mode is a buffer-local minor mode.
       (let ((inhibit-point-motion-hooks t))
         (forward-line))
       (setq line (1+ line)))
+    (when (and face-remapping-alist (bound-and-true-p linum-mode))
+      (let ((h (cadr (assq :height (assq 'default face-remapping-alist)))))
+	(when (numberp h)
+	  (setq width (ceiling (* width h))))))
     (set-window-margins win width (cdr (window-margins win)))))
 
 (defun linum-after-change (beg end _len)