qt5base-lts/util
Giuseppe D'Angelo a794c5e287 Unicode: fix the extended grapheme cluster algorithm
UAX #29 in Unicode 11 changed the EGC algorithm to its current form.
Although Qt has upgraded the Unicode tables all the way up to
Unicode 13, the algorithm has never been adapted; in other words,
it has been working by chance for years. Luckily, MOST
of the cases were dealt with correctly, but emoji handling
actually manages to break it.

This commit:

* Adds parsing of emoji-data.txt into the unicode table generator.
  That is necessary to extract the Extended_Pictographic property,
  which is used by the EGC algorithm.

* Regenerates the tables.

* Removes some obsoleted grapheme cluster break properties, and
  adds the ones added in the meanwhile.

* Rewrites the EGC algorithm according to Unicode 13. This is
  done by simplifying a lot the lookup table. Some rules (GB11,
  GB12, GB13) can't be done by the table alone so some hand-rolled
  code is necessary in that case.

* Thanks to these fixes, the complete upstream GraphemeBreakTest
  now passes. Remove the "edited" version that ignored some rows
  (because they were failing).

Change-Id: Iaa07cb2e6d0ab9deac28397f46d9af189d2edf8b
Pick-to: 6.1 6.0 5.15
Fixes: QTBUG-92822
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
2021-04-16 20:31:39 +02:00
..
accessibilityinspector Another round of replacing 0 with nullptr 2020-10-07 23:02:47 +02:00
aglfn Updated license headers 2016-01-21 18:55:18 +00:00
android Coin: fix android emulator script to use bash instead of sh 2021-02-19 10:31:44 +02:00
cmake CMake: pro2cmake: Use latest project version for qml import version 2021-04-15 13:27:23 +02:00
edid Minor grammar fixup 2018-08-03 18:11:24 +00:00
glgen Remove the openglextensions module 2020-06-10 09:35:04 +02:00
gradientgen Replace Qt CONSTEXPR defines with constexpr 2020-08-14 15:52:58 +02:00
harfbuzz
includemocs QtCore: include mocs 2017-05-05 03:03:30 +00:00
integrity
lexgen Replace QtTest headers with QTest 2020-12-22 15:20:30 +01:00
locale_database Add the "Territory" enumerated type for QLocale 2021-04-15 20:17:49 +08:00
plugintest Updated license headers 2016-01-21 18:55:18 +00:00
publicSuffix Eliminate the need to preprocess the public suffix list 2021-01-25 18:03:00 +01:00
qfloat16-tables Round float->qfloat16 to even 2020-09-06 12:35:12 +02:00
unicode Unicode: fix the extended grapheme cluster algorithm 2021-04-16 20:31:39 +02:00
x86simdgen Move qsimd* from corelib/tools to corelib/global 2020-03-26 09:15:32 +01:00
xkbdatagen Add the "Territory" enumerated type for QLocale 2021-04-15 20:17:49 +08:00