Telling ncurses to really redraw the line, without optimization.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4907 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,3 +1,10 @@
+2014-05-23  Benno Schulenberg  <bensberg@justemail.net>
+	* src/winio.c (edit_draw): Finally, the proper fix for bug #31743;
+	telling ncurses to really redraw the line, without optimization, so
+	it will not mistakenly assume that a wide character at the start of
+	a line takes up just one column.  This deletes the workaround that
+	had the side effect of creating pastes full of trailing whitespace.
+
 2014-05-19  Mark Majeres  <mark@engine12.com>
 	* src/winio.c (edit_draw): Paint the current line *after* tickling the
 	terminal, so that the character in the final column will be displayed

src/winio.c

@@ -2492,15 +2492,13 @@ void edit_draw(filestruct *fileptr, const char *converted, int
     assert(openfile != NULL && fileptr != NULL && converted != NULL);
     assert(strlenpt(converted) <= COLS);
 
-#ifdef ENABLE_UTF8
-    if (using_utf8())
-	/* Tickle the terminal into displaying two-column characters
-	 * properly, using Unicode 00A0 (No-Break Space). */
-	mvwaddstr(edit, line, COLS - 1, "\xC2\xA0\x00");
-#endif
     /* First simply paint the line -- then we'll add colors or the
      * marking highlight on just the pieces that need it. */
     mvwaddstr(edit, line, 0, converted);
+    /* Tell ncurses to really redraw the line without trying to optimize
+       for what it thinks is already there, because it gets it wrong in
+       the case of a wide character in column zero.  See bug #31743. */
+    wredrawln(edit, line, 1);
 
 #ifndef DISABLE_COLOR
     /* If color syntaxes are available and turned on, we need to display