From 7a654d17d6dc1fb17c89194488ab3a0bf80a257f Mon Sep 17 00:00:00 2001
From: morioka <morioka>
Date: Tue, 17 Feb 1998 12:29:22 +0000
Subject: [PATCH] (eword-decode-token): New function.
 (eword-decode-structured-field-body): Add new optional
 arguments `START-COLUMN' and `MAX-COLUMN'; fill results;
 use function `eword-decode-token'. (eword-decode-header):
 Specify START-COLUMN for
 `eword-decode-structured-field-body'.

---
 eword-decode.el |   68 ++++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 45 insertions(+), 23 deletions(-)

diff --git a/eword-decode.el b/eword-decode.el
index 60c5621..91195d3 100644
--- a/eword-decode.el
+++ b/eword-decode.el
@@ -10,7 +10,7 @@
 ;;	Renamed: 1993/06/03 to tiny-mime.el
 ;;	Renamed: 1995/10/03 from tiny-mime.el (split off encoder)
 ;;	Renamed: 1997/02/22 from tm-ew-d.el
-;; Version: $Revision: 1.4 $
+;; Version: $Revision: 1.5 $
 ;; Keywords: encoded-word, MIME, multilingual, header, mail, news
 
 ;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
@@ -45,7 +45,7 @@
 ;;;
 
 (defconst eword-decode-RCS-ID
-  "$Id: eword-decode.el,v 1.4 1998-02-16 21:25:30 morioka Exp $")
+  "$Id: eword-decode.el,v 1.5 1998-02-17 12:29:22 morioka Exp $")
 (defconst eword-decode-version (get-version-string eword-decode-RCS-ID))
 
 
@@ -218,13 +218,14 @@ If SEPARATOR is not nil, it is used as header separator."
 		      code-conversion
 		    default-mime-charset))))
 	(if default-charset
-	    (let (beg end field-name)
+	    (let (beg end field-name len)
 	      (goto-char (point-min))
 	      (while (re-search-forward std11-field-head-regexp nil t)
 		(setq beg (match-beginning 0)
 		      p (match-end 0)
-		      field-name (intern
-				  (downcase (buffer-substring beg (1- p))))
+		      field-name (buffer-substring beg (1- p))
+		      len (string-width field-name)
+		      field-name (intern (downcase field-name))
 		      end (std11-field-end))
 		(cond ((memq field-name eword-decode-ignored-field-list)
 		       ;; Don't decode
@@ -234,7 +235,8 @@ If SEPARATOR is not nil, it is used as header separator."
 		       (let ((body (buffer-substring p end))
 			     (default-mime-charset default-charset))
 			 (delete-region p end)
-			 (insert (eword-decode-structured-field-body body))
+			 (insert (eword-decode-structured-field-body
+				  body (1+ len)))
 			 ))
 		      (t
 		       ;; Decode as unstructured field
@@ -453,7 +455,17 @@ characters encoded as encoded-words or invalid \"raw\" format.
 			eword-lexical-analyze-cache-max)))
       ret)))
 
-(defun eword-decode-structured-field-body (string &optional must-unfold)
+(defun eword-decode-token (token)
+  (let ((type (car token))
+	(value (cdr token)))
+    (cond ((eq type 'quoted-string)
+	   (std11-wrap-as-quoted-string value))
+	  ((eq type 'comment)
+	   (concat "(" (std11-wrap-as-quoted-pairs value '(?( ?))) ")"))
+	  (t value))))
+
+(defun eword-decode-structured-field-body (string &optional must-unfold
+						  start-column max-column)
   "Decode non us-ascii characters in STRING as structured field body.
 STRING is unfolded before decoding.
 
@@ -467,22 +479,32 @@ decode the charset included in it, it is not decoded.
 If MUST-UNFOLD is non-nil, it unfolds and eliminates line-breaks even
 if there are in decoded encoded-words (generated by bad manner MUA
 such as a version of Net$cape)."
-  (mapconcat (function
-	      (lambda (token)
-		(let ((type (car token))
-		      (value (cdr token)))
-		  (cond ((eq type 'quoted-string)
-			 (std11-wrap-as-quoted-string value)
-			 )
-			((eq type 'comment)
-			 (concat "("
-				 (std11-wrap-as-quoted-pairs value '(?( ?)))
-				 ")")
-			 )
-			(t
-			 value)))))
-	     (eword-lexical-analyze string must-unfold)
-	     ""))
+  (or max-column
+      (setq max-column fill-column))
+  (let ((c (or start-column 6))
+	(tokens (eword-lexical-analyze string must-unfold))
+	(result ""))
+    (while tokens
+      (let* ((token (car tokens))
+	     (type (car token)))
+	(setq tokens (cdr tokens))
+	(if (eq type 'spaces)
+	    (let* ((next-token (car tokens))
+		   (next-str (eword-decode-token next-token))
+		   (next-len (string-width next-str))
+		   (next-c (+ c next-len 1)))
+	      (if (< next-c max-column)
+		  (setq result (concat result " " next-str)
+			c next-c)
+		(setq result (concat result "\n " next-str)
+		      c (1+ next-len)))
+	      (setq tokens (cdr tokens))
+	      )
+	  (let* ((str (eword-decode-token token)))
+	    (setq result (concat result str)
+		  c (+ c (string-width str)))
+	    ))))
+    result))
 
 (defun eword-decode-unstructured-field-body (string &optional must-unfold)
   "Decode non us-ascii characters in STRING as unstructured field body.
-- 
1.7.10.4