[iOS][globalization][icu] Tracking issue for HybridGlobalization: Native API + ICU

[mkhamoyan]

The task is to remove as much data from ICU files as possible and exchange ICU4C functions that are using this data with iOS native functions.

1. Implement Locale functions.

   • GlobalizationNative_GetLocaleInfoString
     Implemented by #81470

   • GlobalizationNative_GetLocaleInfoInt
     Implemented by [OSX] HybridGlobalization implement locale native functions #84417

   • GlobalizationNative_GetLocaleInfoGroupingSizesNative
     Implemented by [OSX] HybridGlobalization implement locale native functions #84417

   • GlobalizationNative_GetLocaleTimeFormat
     Implemented by [OSX] HybridGlobalization implement locale native functions #84417

2. Implement Collation functions.

   • GlobalizationNative_CompareString
     Implemented by [OSX] HybridGlobalization implement compare native function #85965

   • GlobalizationNative_IndexOf
     Implemented by [OSX] HybridGlobalization implement collation native functions #86699

   • GlobalizationNative_LastIndexOf
     Implemented by [OSX] HybridGlobalization implement collation native functions #86699

   • GlobalizationNative_StartsWith
     Implemented by [OSX] HybridGlobalization implement collation native functions #86699

   • GlobalizationNative_EndsWith
     Implemented by [OSX] HybridGlobalization implement collation native functions #86699

   • GlobalizationNative_ChangeCase
     [OSX] HybridGlobalization Implement casing functions #87919
     [OSX] HybridGlobalization workaround instead of insufficiently sized destination buffer exception #88180

   • GlobalizationNative_ChangeCaseInvariant
     [OSX] HybridGlobalization Implement casing functions #87919
     [OSX] HybridGlobalization workaround instead of insufficiently sized destination buffer exception #88180

3. Implement Normalization functions

   • IsNormalized
     Implemented by [iOS][non-icu] HybridGlobalization implement normalization functions  #90582
   • NormalizeString
     Implemented by [iOS][non-icu] HybridGlobalization implement normalization functions  #90582

4. Implement calendar functions

   • GlobalizationNative_GetCalendarInfo
     Implemented by [iOS][non-icu] HybridGlobalization implement calendar data #90004

5. Implement timezoneinfo functions

   • GetTimeZoneDisplayName
     Implemented by [iOS][non-icu] HybridGlobalization implement timezoneinfo functions #91458

6. Create new icu file for mobile, filtering out features that are implemented by native functions

   • Filter out Locale related resources
     Implemented by [Mobile] Reduced ICU files for HybridGlobalization  icu#349
     Implemented by Implement functions to return 3 letter ISO language and country codes icu#372

   • Filter out Collation related resources
     Implemented by [HybridGlobalization] Exclude collation feature from icu on mobile icu#363

7. Add HybridGlobalization flag to sdks and load icudt_hybrid.dat file when hybrid mode is on

   • Add HybridGlobalization flag to dotnet/sdk [iOS] Add HybridGlobalization flag in dotnet/sdk sdk#33669
   • Add HybridGlobalization flag to xamarin/macios sdk [iOS] HybridGlobalization set flag in SDK macios#18498
   • Load icudt_hybrid.dat file when hybrid mode is on [OSX] When HybridGlobalization mode is on load hybrid icu file  #88041

8. Tasks opened during feature implemetations

   • Find out exact ordering of hiragana/katakana letters in native apple platforms #86636
   • Implement missing cases for GlobalizationNative_GetLocaleInfoString #83514
   • [iOS][globalization][icu] Refactor GlobalizationNative_IndexOfNative function #87767

Details to be added.

cc @SamMonoRT

Tagging subscribers to 'os-ios': @steveisok, @akoeplinger
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Issue Details

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The task is to remove as much data from ICU files as possible and exchange ICU4C functions that are using this data with iOS native functions.

Details to be added.

Author:	mkhamoyan
Assignees:	mkhamoyan
Labels:	area-System.Globalization, os-ios, needs-author-action
Milestone:	-

This issue has been marked needs-author-action and may be missing some important information.

[steveisok]

@mkhamoyan @filipnavara put together a good mapping that will likely get us a ways there.

dotnet/designs#225 (comment)

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