[pango/missing-zerowidth-chars] Add a few missing chars to pango_is_zero_width

[Matthias Clasen <matthiasc src gnome org>]

commit cba71eea549a65aa229559206f9204665510d0aa
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jul 9 12:10:37 2021 -0400

    Add a few missing chars to pango_is_zero_width
    
    The documentation for this function states that all
    bidi control chars are zero width, but it was missing
    the Isolate ones. Add them.
    
    Updated tests included.

 pango/pango-utils.c | 16 +++++++++++-----
 tests/testmisc.c    | 11 +++++++++++
 2 files changed, 22 insertions(+), 5 deletions(-)
---
diff --git a/pango/pango-utils.c b/pango/pango-utils.c
index c90b4c86..894935e7 100644
--- a/pango/pango-utils.c
+++ b/pango/pango-utils.c
@@ -920,23 +920,29 @@ pango_is_zero_width (gunichar ch)
  *
  *  2028  LINE SEPARATOR
  *
+ *  2060  WORD JOINER
+ *  2061  FUNCTION APPLICATION
+ *  2062  INVISIBLE TIMES
+ *  2063  INVISIBLE SEPARATOR
+ *
+ *  2066  LEFT-TO-RIGHT ISOLATE
+ *  2067  RIGHT-TO-LEFT ISOLATE
+ *  2068  FIRST STRONG ISOLATE
+ *  2069  POP DIRECTIONAL ISOLATE
+ *
  *  202A  LEFT-TO-RIGHT EMBEDDING
  *  202B  RIGHT-TO-LEFT EMBEDDING
  *  202C  POP DIRECTIONAL FORMATTING
  *  202D  LEFT-TO-RIGHT OVERRIDE
  *  202E  RIGHT-TO-LEFT OVERRIDE
  *
- *  2060  WORD JOINER
- *  2061  FUNCTION APPLICATION
- *  2062  INVISIBLE TIMES
- *  2063  INVISIBLE SEPARATOR
- *
  *  FEFF  ZERO WIDTH NO-BREAK SPACE
  */
   return ((ch & ~(gunichar)0x007F) == 0x2000 && (
                (ch >= 0x200B && ch <= 0x200F) ||
                (ch >= 0x202A && ch <= 0x202E) ||
                (ch >= 0x2060 && ch <= 0x2063) ||
+                (ch >= 0x2066 && ch <= 0x2069) ||
                (ch == 0x2028)
         )) || G_UNLIKELY (ch == 0x00AD
                        || ch == 0x034F
diff --git a/tests/testmisc.c b/tests/testmisc.c
index c0f8c426..fe2e9075 100644
--- a/tests/testmisc.c
+++ b/tests/testmisc.c
@@ -178,6 +178,17 @@ test_is_zero_width (void)
   g_assert_true (pango_is_zero_width (0x034f));
   g_assert_false (pango_is_zero_width ('a'));
   g_assert_false (pango_is_zero_width ('c'));
+
+  g_assert_true (pango_is_zero_width (0x2066));
+  g_assert_true (pango_is_zero_width (0x2067));
+  g_assert_true (pango_is_zero_width (0x2068));
+  g_assert_true (pango_is_zero_width (0x2069));
+
+  g_assert_true (pango_is_zero_width (0x202a));
+  g_assert_true (pango_is_zero_width (0x202b));
+  g_assert_true (pango_is_zero_width (0x202c));
+  g_assert_true (pango_is_zero_width (0x202d));
+  g_assert_true (pango_is_zero_width (0x202e));
 }
 
 static void