keysym: add xkb_keysym_to_{lower,upper} to public API

These can be useful in some odd cases.

There is already an implementation (+ tests) for internal use, so all
that's needed is to export them.

If xkbcommon were to provide a way to convert a Unicode codepoint to a
keysym, this could have been implemented externally as follows:

    uint32_t codepoint = xkb_keysym_to_utf32(keysym);
    uint32_t upper_codepoint = my_unicode_library_to_upper(codepoint);
    xkb_keysym_t upper_keysym = theoretical_xkb_keysym_from_utf32(upper_codepoint);

However keysym -> codepoint is not injective so such a function is not
possible strictly speaking.

Signed-off-by: Ran Benita <ran234@gmail.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index abe9fd7..15859ae 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,16 @@
+libxkbcommon 0.8.0 - UNRELEASED
+
+- Add xkb_keysym_to_{upper,lower} to perform case-conversion directly on
+  keysyms. This is useful in some odd cases, but working with the Unicode
+  representations should be preferred when possible.
+
+- Added Unicode conversion rules for the signifblank and permille keysyms.
+
+- New API:
+  xkb_keysym_to_upper()
+  xkb_keysym_to_lower()
+
+==================
 libxkbcommon 0.7.2 - 2017-08-04
 ==================