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Allow TimeZoneInfo display names to use any of the installed Windows languages - #52992
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Tagging subscribers to this area: @tannergooding Issue Details
Since the data comes from the NLS resources installed with Windows language packs, we still can't support all languages on Windows. However, with this change we can now support any that are installed. If the Note, the unit test will only run if there are at least two language packs installed that have different root languages, as we need to compare that lang1's values are different than lang2's. I'm not sure if there are any machines in Helix set up like this, but the test does work on my local machine with English and French installed. Fixes #50310
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tarekgh
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tarekgh
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Thanks @mattjohnsonpint. LGTM
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Remaining failures appear unrelated. |
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@mattjohnsonpint I have restarted the failed tests. |
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I opened the issue #53110 to track the unrelated failure in the CI leg |
@tarekgh This failure was introduced by this PR. It is caused by interop definitions in WindowsUILanguageHelper. You may argue that the runtime should not assert and I agree, but that is not good enough justification for merging a change that will cause every PR to be red. |
Can you please explain further? I will fix asap. |
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Sorry I overlooked the failure. @mattjohnsonpint is it ok to revert the changes and resubmit it with the fix? |
…Windows languages (dotnet#52992)" This reverts commit b54dbaf.
| private const string InvariantUtcStandardDisplayName = "Coordinated Universal Time"; | ||
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| private static readonly Dictionary<string, string> s_FileMuiPathCache = new(); | ||
| private static readonly TimeZoneInfo s_utcTimeZone = CreateUtcTimeZone(); |
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We have a TimeZoneInfo.cs file. This private static readonly TimeZoneInfo s_utcTimeZone = CreateUtcTimeZone(); is now declared in both TimeZoneInfo.Unix.cs and TimeZoneInfo.Win32.cs. Can this not be deduplicated into the shared TimeZoneInfo.cs file?
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This one was duplicated intentionally, as the mui cache has to be initialized first, and there's no sequence guaranteed for static initialization across partial class files. The alternative was to initialize the mui cache in the main file with a #if TARGET_WINDOWS around it.
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This one was duplicated intentionally, as the mui cache has to be initialized first, and there's no sequence guaranteed for static initialization across partial class files.
Ok... then it's missing a comment explaining that ;-)
| private const int MaxKeyLength = 255; | ||
| private const string InvariantUtcStandardDisplayName = "Coordinated Universal Time"; | ||
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| private static readonly Dictionary<string, string> s_FileMuiPathCache = new(); |
| var lang = new string(language); | ||
| if (string.Equals(lang, cultureInfo.Name, StringComparison.OrdinalIgnoreCase)) |
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We shouldn't need to allocate the string just to do this comparison. Presumably exact match is common and we'd want to delay the creation of lang until after this if block? This can instead be:
ReadOnlySpan<char> lang = MemoryMarshal.CreateReadOnlySpanFromNullTerminated(language);
if (lang.Equals(cultureInfo.Name, StringComparison.OrdinalIgnoreCase)Then below if we need lang for the GetCultureInfo call, that can just be CultureInfo.GetCultureInfo(lang.ToString());.
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| if (succeeded) | ||
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| fileMuiPath[Interop.Kernel32.MAX_PATH] = '\0'; |
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This line exists in multiple places here and below. It would be safer and simpler to just dedup that into a single line above just after the GetFileMUIPath call.
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Not sure if it's even needed. The API always returns a null terminated string. Tarek asked for it just to be safe. Note, the two length values from the API are useless - they are the buffer lengths, not the values lengths.
| return new string(fileMuiPath); | ||
| } | ||
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| // Shouldn't get here, as there's always at least one language installed. |
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This would ideally be a Debug.Fail.
TimeZoneInfoon Windows previously was locked to using only the OS default UI language for itsDisplayName,StandardNameandDaylightNameproperties (contrast with Unix where it will use theCultureInfo.CurrentUICulture).Since the data comes from the NLS resources installed with Windows language packs, we still can't support all languages on Windows. However, with this change we can now support any that are installed. If the
CurrentUICulturematches one of the languages installed (e.g.fr-FR=fr-FR) it will use it. Otherwise, it will search for an installed language with the same parent language (e.g.fr-CA≈fr-FR) to use. Finally, it will fallback to the existing behavior of using the default language.Note, the unit test will only run if there are at least two languages installed that have different root languages, as we need to compare that lang1's values are different than lang2's. I'm not sure if there are any machines in Helix set up like this, but the test does work on my local machine with English and French installed.
Fixes #50310
@tarekgh