(ctext-pre-write-conversion): Handle the

case when FROM is a string, and when we are called from
build_annotations_2.

1 files changed, 21 insertions, 3 deletions

diff --git a/lisp/international/mule.el b/lisp/international/mule.el
index 9bb9c4bf5cc..8235ce58e65 100644
--- a/lisp/international/mule.el
+++ b/lisp/international/mule.el
@@ -1392,9 +1392,23 @@ encode each character in this charset.  NOCTETS can be 0 (meaning the number
 of octets per character is variable), 1, 2, 3, or 4.")
 
 (defun ctext-pre-write-conversion (from to)
-  "Encode characters between FROM and TO as Compound Text w/Extended Segments."
-  (buffer-disable-undo) ; minimize consing due to insertions and deletions
-  (narrow-to-region from to)
+  "Encode characters between FROM and TO as Compound Text w/Extended Segments.
+
+If FROM is a string, or if the current buffer is not the one set up for us
+by run_pre_post_conversion_on_str, generate a new temp buffer, insert the
+text, and convert it in the temporary buffer.  Otherwise, convert in-place."
+  (cond ((and (string= (buffer-name) " *code-converting-work*")
+              (not (stringp from)))
+         ; Minimize consing due to subsequent insertions and deletions.
+         (buffer-disable-undo)
+         (narrow-to-region from to))
+        (t
+         (let ((buf (current-buffer)))
+           (set-buffer (generate-new-buffer " *temp"))
+           (buffer-disable-undo)
+           (if (stringp from)
+               (insert from)
+             (insert-buffer-substring buf from to)))))
   (encode-coding-region from to 'ctext-no-compositions)
   ;; Replace ISO-2022 charset designations with extended segments, for
   ;; those charsets that are not part of the official X registry.
@@ -1404,6 +1418,8 @@ of octets per character is variable), 1, 2, 3, or 4.")
           (case-fold-search nil)
           pt desig encode-info encoding chset noctets textlen)
       (set-buffer-multibyte nil)
+      ;; The regexp below finds the leading sequences for big5 and
+      ;; iso8859-1[03-6] charsets.
       (while (re-search-forward "\e\\(\$([01]\\|-[VY_bf]\\)" nil 'move)
         (setq desig (match-string 1)
               pt (point-marker)
@@ -1416,6 +1432,7 @@ of octets per character is variable), 1, 2, 3, or 4.")
         (cond
          ((eq encoding t)  ; only the leading sequence needs to be changed
           (setq textlen (+ (- newpt pt) (length chset) 1))
+          ;; Generate the ICCCM control sequence for an extended segment.
           (replace-match (format "\e%%/%d%c%c%s"
                                  noctets
                                  (+ (/ textlen 128) 128)
@@ -1437,6 +1454,7 @@ of octets per character is variable), 1, 2, 3, or 4.")
                           chset))))
         (goto-char newpt))))
   (set-buffer-multibyte t)
+  ;; Must return nil, as build_annotations_2 expects that.
   nil)
 
 ;;; FILE I/O