Implement ignore and UTF-8

docs/LOCALE.md

@@ -0,0 +1,17 @@
+Locale Considerations
+=====================
+
+The editline library has basic support for locales via the use of the standard
+POSIX functions `mbrtowc` and `wcwidth`.  As a result, the on-screen width of
+characters in printed text should be calculated correctly, the so-called 
+[East Asian ambiguous][] characters being a notable exception.
+
+  [East Asian ambiguous]: http://www.unicode.org/reports/tr11/tr11-38.html
+
+The input handling is not yet multibyte-aware. Specifically, the presence of
+non-self-synchonizing encodings requires always segmenting the whole string
+using `mbrlen` when deleting.
+
+Programs wishing to use the feature need to link to a build of `editline`
+configured with `--enable-locale`.  In addition, the program should call
+`setlocale(LC_CTYPE, "")` to use the locale settings of the environment.

docs/TODO.md

@@ -29,11 +29,9 @@ Other minor TODO's
   `el_bind_key()` exists.
 - Make `char *rl_prompt;` globally visible.
 - Add support for `rl_set_prompt()`
-- Add support for `--enable-utf8` to configure script
 - Use `strcmp(nl_langinfo(CODESET), "UTF-8")` to look for utf8 capable
   terminal
-- Implement simple UTF-8 parser according to
-  http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
+- Make the input multibyte-aware in `insert_string` and `delete_string`.
 
 
 [gnu]:     http://www.delorie.com/gnu/docs/readline/rlman_41.html#IDX288