doc: Document properties for Emojis.

* doc/unictype.texi (Properties as objects): Document UC_PROPERTY_EMOJI,
UC_PROPERTY_EMOJI_PRESENTATION, UC_PROPERTY_EMOJI_MODIFIER,
UC_PROPERTY_EMOJI_MODIFIER_BASE, UC_PROPERTY_EMOJI_COMPONENT,
UC_PROPERTY_EXTENDED_PICTOGRAPHIC.
(Properties as functions): Document uc_is_property_emoji,
uc_is_property_emoji_presentation, uc_is_property_emoji_modifier,
uc_is_property_emoji_modifier_base, uc_is_property_emoji_component,
uc_is_property_extended_pictographic.
* NEWS: Mention the new properties.

3 files changed, 42 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index cecab08..27ace94 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2021-12-30  Bruno Haible  <bruno@clisp.org>
+
+	doc: Document properties for Emojis.
+	* doc/unictype.texi (Properties as objects): Document UC_PROPERTY_EMOJI,
+	UC_PROPERTY_EMOJI_PRESENTATION, UC_PROPERTY_EMOJI_MODIFIER,
+	UC_PROPERTY_EMOJI_MODIFIER_BASE, UC_PROPERTY_EMOJI_COMPONENT,
+	UC_PROPERTY_EXTENDED_PICTOGRAPHIC.
+	(Properties as functions): Document uc_is_property_emoji,
+	uc_is_property_emoji_presentation, uc_is_property_emoji_modifier,
+	uc_is_property_emoji_modifier_base, uc_is_property_emoji_component,
+	uc_is_property_extended_pictographic.
+	* NEWS: Mention the new properties.
+
 2021-12-29  Bruno Haible  <bruno@clisp.org>
 
 	doc: Update for new behaviour of line breaking functions.
diff --git a/NEWS b/NEWS
index f03c616..5ce0a9a 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,15 @@ New in 0.9.11:
   easier to work with strings that contain CR-LF sequences: In this case,
   in the returned array, it will return UC_BREAK_CR_BEFORE_LF followed by
   UC_BREAK_MANDATORY (instead of twice UC_BREAK_MANDATORY).
+* There are new properties for recognizing pictographic symbols and
+  regional indicators:
+    - UC_PROPERTY_EMOJI                  uc_is_property_emoji
+    - UC_PROPERTY_EMOJI_PRESENTATION     uc_is_property_emoji_presentation
+    - UC_PROPERTY_EMOJI_MODIFIER         uc_is_property_emoji_modifier
+    - UC_PROPERTY_EMOJI_MODIFIER_BASE    uc_is_property_emoji_modifier_base
+    - UC_PROPERTY_EMOJI_COMPONENT        uc_is_property_emoji_component
+    - UC_PROPERTY_EXTENDED_PICTOGRAPHIC  uc_is_property_extended_pictographic
+    - UC_PROPERTY_REGIONAL_INDICATOR     uc_is_property_regional_indicator
 * Fixed multithread-safety bugs on Cygwin, native Windows, and Haiku.
 
 New in 0.9.10:
diff --git a/doc/unictype.texi b/doc/unictype.texi
index 7fc5d6a..db0744c 100644
--- a/doc/unictype.texi
+++ b/doc/unictype.texi
@@ -1049,6 +1049,16 @@ The following properties deal with CJK.
 @deftypevrx Constant uc_property_t UC_PROPERTY_IDS_TRINARY_OPERATOR
 @end deftypevr
 
+The following properties deal with pictographic symbols.
+
+@deftypevr Constant uc_property_t UC_PROPERTY_EMOJI
+@deftypevrx Constant uc_property_t UC_PROPERTY_EMOJI_PRESENTATION
+@deftypevrx Constant uc_property_t UC_PROPERTY_EMOJI_MODIFIER
+@deftypevrx Constant uc_property_t UC_PROPERTY_EMOJI_MODIFIER_BASE
+@deftypevrx Constant uc_property_t UC_PROPERTY_EMOJI_COMPONENT
+@deftypevrx Constant uc_property_t UC_PROPERTY_EXTENDED_PICTOGRAPHIC
+@end deftypevr
+
 Other miscellaneous properties are:
 
 @deftypevr Constant uc_property_t UC_PROPERTY_ZERO_WIDTH
@@ -1199,6 +1209,16 @@ The following properties deal with CJK.
 @deftypefunx bool uc_is_property_ids_trinary_operator (ucs4_t@tie{}@var{uc})
 @end deftypefun
 
+The following properties deal with pictographic symbols.
+
+@deftypefun bool uc_is_property_emoji (ucs4_t@tie{}@var{uc})
+@deftypefunx bool uc_is_property_emoji_presentation (ucs4_t@tie{}@var{uc})
+@deftypefunx bool uc_is_property_emoji_modifier (ucs4_t@tie{}@var{uc})
+@deftypefunx bool uc_is_property_emoji_modifier_base (ucs4_t@tie{}@var{uc})
+@deftypefunx bool uc_is_property_emoji_component (ucs4_t@tie{}@var{uc})
+@deftypefunx bool uc_is_property_extended_pictographic (ucs4_t@tie{}@var{uc})
+@end deftypefun
+
 Other miscellaneous properties are:
 
 @deftypefun bool uc_is_property_zero_width (ucs4_t@tie{}@var{uc})