[PATCH] Margins in exported messages

I have found a bug in pine (4.64) which affects the margins in exported 
messages. The following procedure illustrates the effect:

- open an xterm (or any terminal emulator) and set its size to 80 columns
- run pine
- in Setup/Config set "viewer-margin-right" to "80c"
- export a message to file
- resize the terminal to 120 columns
- export the same message to a different file
- compare the formatting

The width of the text clearly decreases with increasing terminal size and 
this effect can even cause pine to hang while exporting a message on very 
large terminals.

The problem lies in the function format_view_margin (mailview.c), which 
computes margins assuming the text width is ps_global->ttyo->screen_cols, 
regardless of whether the text is really bound for display. The solution 
is to explicitly pass the requested text width to the function.

A patch is attached below, please test.

Kind regards,
Andrej Lajovic



------------8<------------(mailview.c.patch)------------8<------------

--- mailview.c.orig	2005-09-20 20:26:20.000000000 +0200
+++ mailview.c	2006-09-06 23:27:03.000000000 +0200
@@ -293,7 +293,7 @@
  int	    format_raw_hdr_string PROTO((char *, char *, gf_io_t, int));
  int	    format_env_puts PROTO((char *, gf_io_t));
  long	    format_size_guess PROTO((BODY *));
-int	   *format_view_margin PROTO((void));
+int	   *format_view_margin PROTO((int));
  void        pine_rfc822_write_address_noquote PROTO((ADDRESS *,
  						     gf_io_t, int *));
  void        pine2_rfc822_write_address_noquote PROTO((char *,ADDRESS *,int *));
@@ -1608,9 +1608,9 @@
  	       && !(flgs & FM_NOCOLOR)
  	       && pico_usingcolor())
  	      wrapflags |= GFW_USECOLOR;
-	    gf_link_filter(gf_wrap, gf_wrap_filter_opt(ps_global->ttyo->screen_cols,
-						       ps_global->ttyo->screen_cols,
-						       format_view_margin(),
+	    gf_link_filter(gf_wrap, gf_wrap_filter_opt(width,
+						       width,
+						       format_view_margin(width),
  						       0,
  						       wrapflags));
  	    gf_link_filter(gf_nvtnl_local, NULL);
@@ -1661,7 +1661,7 @@
  	 * can be only a fraction of screen_cols we've already checked
  	 * is less than #define MAX_SCREEN_COLS, right?
  	 */
-	margin = format_view_margin();
+	margin = format_view_margin(width);
  	strncpy(margin_str, repeat_char(margin[0], ' '), sizeof(margin_str)-1);
  	margin_str[sizeof(margin_str)-1] = '\0';

@@ -1879,7 +1879,7 @@

  	    if(!(gf_puts(NEWLINE, pc)
  		 && !format_editorial(tmp_20k_buf,
-				      ps_global->ttyo->screen_cols, pc)
+				      width, pc)
  		 && gf_puts(NEWLINE, pc) && gf_puts(NEWLINE, pc)))
  	      goto write_error;

@@ -1905,8 +1905,8 @@
              else if(a->body->subtype
  		    && strucmp(a->body->subtype, "external-body") == 0) {
  		char es[512];
-		int *m = format_view_margin();
-		int c = ps_global->ttyo->screen_cols;
+		int *m = format_view_margin(width);
+		int c = width;

  		c -= (m != NULL) ? m[0] : 0;
  		c -= (m != NULL) ? m[1] : 0;
@@ -1985,7 +1985,7 @@
      if(tmp)
        fs_give((void **)&tmp);

-    margin = format_view_margin();
+    margin = format_view_margin(width);
      width -= (margin[0] + margin[1]);

      if(width > 40){
@@ -2246,7 +2246,8 @@
   * format_view_margin - return sane value for vertical margins
   */
  int *
-format_view_margin()
+format_view_margin(width)
+    int width;
  {
      static int margin[2];
      char tmp[100], e[200], *err, lastchar = 0;
@@ -2288,7 +2289,7 @@
  		else
  		  leftm = left;

-		leftm = min(max(0, leftm), ps_global->ttyo->screen_cols);
+		leftm = min(max(0, leftm), width);
  	    }
  	}
      }
@@ -2311,17 +2312,17 @@
  	    }
  	    else{
  		if(lastchar == 'c')
-		  rightm = ps_global->ttyo->screen_cols - right;
+		  rightm = width - right;
  		else
  		  rightm = right;

-		rightm = min(max(0, rightm), ps_global->ttyo->screen_cols);
+		rightm = min(max(0, rightm), width);
  	    }
  	}
      }

      if((rightm > 0 || leftm > 0) && rightm >= 0 && leftm >= 0
-       && ps_global->ttyo->screen_cols - rightm - leftm >= 8){
+       && width - rightm - leftm >= 8){
  	margin[0] = leftm;
  	margin[1] = rightm;
      }
@@ -5836,7 +5837,7 @@
  	wrapit = 0;		/* wrap already handled! */
  	filters[filtcnt].filter = gf_html2plain;
  	filters[filtcnt++].data = gf_html2plain_opt(NULL, column,
-						    format_view_margin(),
+						    format_view_margin(column),
  						    handlesp, opts);
      }

@@ -5893,7 +5894,7 @@
  	filters[filtcnt++].data = gf_wrap_filter_opt(wrapit, column,
  						     (flags & FM_NOINDENT)
  						       ? 0
-						       : format_view_margin(),
+						       : format_view_margin(column),
  						     0, wrapflags);
      }

@@ -5915,7 +5916,7 @@
  	dq.is_flowed = is_flowed_msg;
  	dq.indent_length = (wrapit && !(flags & FM_NOWRAP)
  			    && !(flags & FM_NOINDENT))
-			       ? format_view_margin()[0]
+			       ? format_view_margin(column)[0]
  			       : 0;
  	dq.saved_line = &free_this;
  	dq.handlesp   = handlesp;
@@ -6296,7 +6297,7 @@
  	      gf_link_filter(gf_wrap,
  			     gf_wrap_filter_opt(column, column,
  					        (flags & FM_NOINDENT)
-						  ? 0 : format_view_margin(), 4,
+						  ? 0 : format_view_margin(column), 4,
  				 GFW_ONCOMMA | (handlesp ? GFW_HANDLES : 0)));

  	    if(prefix && *prefix)
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