(append_glyph): Refer to it->char_to_display instead of

it->c.
(produce_glyphs): Set the character to print in
it->char_to_display.  Handle
unibyte-display-via-language-environment.
(produce_stretch_glyph): Set the character to print in
it->char_to_display.

1 files changed, 34 insertions, 19 deletions

diff --git a/src/term.c b/src/term.c
index 8c6250c522e..2b44653b961 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1634,10 +1634,10 @@ static void produce_stretch_glyph P_ ((struct it *));
 
 
 /* Append glyphs to IT's glyph_row.  Called from produce_glyphs for
-   terminal frames if IT->glyph_row != NULL.  IT->c is the character
-   for which to produce glyphs; IT->face_id contains the character's
-   face.  Padding glyphs are appended if IT->c has a IT->pixel_width >
-   1.  */
+   terminal frames if IT->glyph_row != NULL.  IT->char_to_display is
+   the character for which to produce glyphs; IT->face_id contains the
+   character's face.  Padding glyphs are appended if IT->c has a
+   IT->pixel_width > 1.  */
 
 static void
 append_glyph (it)
@@ -1657,7 +1657,7 @@ append_glyph (it)
     {
       glyph->type = CHAR_GLYPH;
       glyph->pixel_width = 1;
-      glyph->u.ch = it->c;
+      glyph->u.ch = it->char_to_display;
       glyph->face_id = it->face_id;
       glyph->padding_p = i > 0;
       glyph->charpos = CHARPOS (it->position);
@@ -1708,6 +1708,9 @@ produce_glyphs (it)
   xassert (it->what == IT_CHARACTER
            || it->what == IT_COMPOSITION);
 
+  /* Maybe translate single-byte characters to multibyte.  */
+  it->char_to_display = it->c;
+
   if (it->c >= 040 && it->c < 0177)
     {
       it->pixel_width = it->nglyphs = 1;
@@ -1737,13 +1740,11 @@ produce_glyphs (it)
         {
           int n = nspaces;
 
-          it->c = ' ';
+          it->char_to_display = ' ';
           it->pixel_width = it->len = 1;
 
           while (n--)
             append_glyph (it);
-
-          it->c = '\t';
         }
 
       it->pixel_width = nspaces;
@@ -1751,14 +1752,30 @@ produce_glyphs (it)
     }
   else if (SINGLE_BYTE_CHAR_P (it->c))
     {
-      /* Coming here means that it->c is from display table, thus we
-         must send the code as is to the terminal.  Although there's
-         no way to know how many columns it occupies on a screen, it
-         is a good assumption that a single byte code has 1-column
-         width.  */
-      it->pixel_width = it->nglyphs = 1;
-      if (it->glyph_row)
-        append_glyph (it);
+      if (unibyte_display_via_language_environment
+          && (it->c >= 0240
+              || !NILP (Vnonascii_translation_table)))
+        {
+          int charset;
+
+          it->char_to_display = unibyte_char_to_multibyte (it->c);
+          charset = CHAR_CHARSET (it->char_to_display);
+          it->pixel_width = CHARSET_WIDTH (charset);
+          it->nglyphs = it->pixel_width;
+          if (it->glyph_row)
+            append_glyph (it);
+        }
+      else
+        {
+          /* Coming here means that it->c is from display table, thus we
+             must send the code as is to the terminal.  Although there's
+             no way to know how many columns it occupies on a screen, it
+             is a good assumption that a single byte code has 1-column
+             width.  */
+          it->pixel_width = it->nglyphs = 1;
+          if (it->glyph_row)
+            append_glyph (it);
+        }
     }
   else
     {
@@ -1843,17 +1860,15 @@ produce_stretch_glyph (it)
       Lisp_Object o_object = it->object;
       Lisp_Object object = it->stack[it->sp - 1].string;
       int n = width;
-      int c = it->c;
 
       if (!STRINGP (object))
         object = it->w->buffer;
       it->object = object;
-      it->c = ' ';
+      it->char_to_display = ' ';
       it->pixel_width = it->len = 1;
       while (n--)
         append_glyph (it);
       it->object = o_object;
-      it->c = c;
     }
   it->pixel_width = width;
   it->nglyphs = width;