Fix and document display of glyphless characters.

 src/xdisp.c (set_cursor_from_row): Fix cursor positioning on
 zero-width characters.
 (syms_of_xdisp) <glyphless-char-display>: Doc fix.
 src/.gdbinit (pgx): Adapt to latest changes in `struct glyph'.
 src/w32term.c (x_draw_glyphless_glyph_string_foreground): Draw the
 box before drawing the glyphs inside it.
 src/dispextern.h (enum glyphless_display_method): Rename
 GLYPHLESS_DISPLAY_HEXA_CODE to GLYPHLESS_DISPLAY_HEX_CODE.  All
 users changed.
 src/term.c (append_glyphless_glyph, produce_glyphless_glyph): Fix
 comments.
 (produce_glyphless_glyph): Enclose "U+nnnn" and "empty box"
 whitespace in "[]", to simulate a box.  Don't use uninitialized
 variable `width'.
 lisp/international/characters.el (glyphless-char-display-control):
 Renamed from glyphless-char-control; all users changed.  Doc fix.
 Signal an error if display method is not one of the recognized
 symbols.
 doc/emacs/rmail.texi (Rmail Coding): Characters with no fonts are not
 necessarily displayed as empty boxes.
 doc/emacs/mule.texi (Language Environments, Fontsets): Characters with no
 fonts are not necessarily displayed as empty boxes.
 doc/emacs/display.texi (Text Display): Document display of glyphless
 characters.
 doc/lispref/display.texi (Usual Display): Characters with no fonts are not
 necessarily displayed as empty boxes.
 etc/NEWS: Document display of glyphless characters.

1 files changed, 22 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 13f90d12790..2bac819c0d5 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,25 @@
+2010-11-13  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (set_cursor_from_row): Fix cursor positioning on
+        zero-width characters.
+
+        * .gdbinit (pgx): Adapt to latest changes in `struct glyph'.
+
+        * w32term.c (x_draw_glyphless_glyph_string_foreground): Draw the
+        box before drawing the glyphs inside it.
+
+        * xdisp.c (syms_of_xdisp) <glyphless-char-display>: Doc fix.
+
+        * dispextern.h (enum glyphless_display_method): Rename
+        GLYPHLESS_DISPLAY_HEXA_CODE to GLYPHLESS_DISPLAY_HEX_CODE.  All
+        users changed.
+
+        * term.c (append_glyphless_glyph, produce_glyphless_glyph): Fix
+        comments.
+        (produce_glyphless_glyph): Enclose "U+nnnn" and "empty box"
+        whitespace in "[]", to simulate a box.  Don't use uninitialized
+        variable `width'.
+
 2010-11-11  Julien Danjou  <julien@danjou.info>
 
         * xsettings.c (init_xsettings): Use already fetch atoms.