(position_indentation): Detect non-breaking space,

in either single-byte form or multibyte form (using category ' ').

1 files changed, 19 insertions, 1 deletions

diff --git a/src/indent.c b/src/indent.c
index 3a8cce764df..b6806f628f7 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -23,6 +23,7 @@ Boston, MA 02111-1307, USA.  */
 #include "lisp.h"
 #include "buffer.h"
 #include "charset.h"
+#include "category.h"
 #include "indent.h"
 #include "frame.h"
 #include "window.h"
@@ -680,6 +681,9 @@ position_indentation (pos)
         }
       switch (*p++)
         {
+        case 0240:
+          if (! NILP (current_buffer->enable_multibyte_characters))
+            return column;
         case ' ':
           column++;
           break;
@@ -687,7 +691,21 @@ position_indentation (pos)
           column += tab_width - column % tab_width;
           break;
         default:
-          return column;
+          if (ASCII_BYTE_P (p[-1])
+              || NILP (current_buffer->enable_multibyte_characters))
+            return column;
+          {
+            int pos = PTR_CHAR_POS (p - 1);
+            int c = FETCH_MULTIBYTE_CHAR (pos);
+            if (CHAR_HAS_CATEGORY (c, ' '))
+              {
+                column++;
+                INC_POS (pos);
+                p = POS_ADDR (pos);
+              }
+            else
+              return column;
+          }
         }
     }
 }