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Use language tag instead of language id

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Jack251970 2025-03-23 22:22:08 +08:00
parent 4fc7f70d18
commit d827d0ac9f
2 changed files with 108 additions and 39 deletions
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4
Flow.Launcher.Infrastructure/NativeMethods.txt
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@ -55,3 +55,7 @@ GetKeyboardLayoutList
PostMessage
WM_INPUTLANGCHANGEREQUEST
INPUTLANGCHANGE_FORWARD
LOCALE_TRANSIENT_KEYBOARD1
LOCALE_TRANSIENT_KEYBOARD2
LOCALE_TRANSIENT_KEYBOARD3
LOCALE_TRANSIENT_KEYBOARD4

143
Flow.Launcher.Infrastructure/Win32Helper.cs
View file

@ -1,16 +1,17 @@
using System;
using System.ComponentModel;
using System.Linq;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Media;
using Flow.Launcher.Infrastructure.UserSettings;
using Microsoft.Win32;
using Windows.Win32;
using Windows.Win32.Foundation;
using Windows.Win32.Graphics.Dwm;
using Windows.Win32.UI.Input.KeyboardAndMouse;
using Windows.Win32.UI.WindowsAndMessaging;
using Flow.Launcher.Infrastructure.UserSettings;
using Point = System.Windows.Point;
namespace Flow.Launcher.Infrastructure
@ -323,16 +324,16 @@ namespace Flow.Launcher.Infrastructure
#region Keyboard Layout
// https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/70feba9f-294e-491e-b6eb-56532684c37f
private static readonly uint[] EnglishLanguageIds =
{
0x0009, 0x0409, 0x0809, 0x0C09, 0x1009, 0x1409, 0x1809, 0x1C09, 0x2009, 0x2409, 0x2809, 0x2C09, 0x3009,
0x3409, 0x3C09, 0x4009, 0x4409, 0x4809, 0x4C09,
};
private const string UserProfileRegistryPath = @"Control Panel\International\User Profile";
private static readonly uint[] ImeLanguageIds =
// https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/70feba9f-294e-491e-b6eb-56532684c37f
private const string EnglishLanguageTag = "en";
private static readonly string[] ImeLanguageTags =
{
0x0004, 0x7804, 0x0804, 0x1004, 0x7C04, 0x0C04, 0x1404, 0x0404, 0x0011, 0x0411, 0x0012, 0x0412,
"zh", // Chinese
"ja", // Japanese
"ko", // Korean
};
private const uint KeyboardLayoutLoWord = 0xFFFF;
@ -340,33 +341,6 @@ namespace Flow.Launcher.Infrastructure
// Store the previous keyboard layout
private static HKL _previousLayout;
private static unsafe HKL FindEnglishKeyboardLayout()
{
// Get the number of keyboard layouts
int count = PInvoke.GetKeyboardLayoutList(0, null);
if (count <= 0) return HKL.Null;
// Get all keyboard layouts
var handles = new HKL[count];
fixed (HKL* h = handles)
{
var result = PInvoke.GetKeyboardLayoutList(count, h);
if (result == 0) throw new Win32Exception(Marshal.GetLastWin32Error());
}
// Look for any English keyboard layout
foreach (var hkl in handles)
{
// The lower word contains the language identifier
var langId = (uint)hkl.Value & KeyboardLayoutLoWord;
// Check if it's an English layout
if (EnglishLanguageIds.Contains(langId)) return hkl;
}
return HKL.Null;
}
/// <summary>
/// Switches the keyboard layout to English if available.
/// </summary>
@ -392,8 +366,14 @@ namespace Flow.Launcher.Infrastructure
// This is needed because for languages with IME mode, Flow Launcher just temporarily disables
// the IME mode instead of switching to another layout.
var currentLayout = PInvoke.GetKeyboardLayout(threadId);
var currentLayoutCode = (uint)currentLayout.Value & KeyboardLayoutLoWord;
if (ImeLanguageIds.Contains(currentLayoutCode)) return;
var currentLangId = (uint)currentLayout.Value & KeyboardLayoutLoWord;
foreach (var langTag in ImeLanguageTags)
{
if (GetLanguageTag(currentLangId).StartsWith(langTag, StringComparison.OrdinalIgnoreCase))
{
return;
}
}
// Backup current keyboard layout
if (backupPrevious) _previousLayout = currentLayout;
@ -423,6 +403,91 @@ namespace Flow.Launcher.Infrastructure
_previousLayout = HKL.Null;
}
/// <summary>
/// Finds an installed English keyboard layout.
/// </summary>
/// <returns></returns>
/// <exception cref="Win32Exception"></exception>
private static unsafe HKL FindEnglishKeyboardLayout()
{
// Get the number of keyboard layouts
int count = PInvoke.GetKeyboardLayoutList(0, null);
if (count <= 0) return HKL.Null;
// Get all keyboard layouts
var handles = new HKL[count];
fixed (HKL* h = handles)
{
var result = PInvoke.GetKeyboardLayoutList(count, h);
if (result == 0) throw new Win32Exception(Marshal.GetLastWin32Error());
}
// Look for any English keyboard layout
foreach (var hkl in handles)
{
// The lower word contains the language identifier
var langId = (uint)hkl.Value & KeyboardLayoutLoWord;
var langTag = GetLanguageTag(langId);
// Check if it's an English layout
if (langTag.StartsWith(EnglishLanguageTag, StringComparison.OrdinalIgnoreCase))
{
return hkl;
}
}
return HKL.Null;
}
/// <summary>
/// Returns the
/// <see href="https://learn.microsoft.com/globalization/locale/standard-locale-names">
/// BCP 47 language tag
/// </see>
/// of the current input language.
/// </summary>
/// <remarks>
/// Edited from: https://github.com/dotnet/winforms
/// </remarks>
private static string GetLanguageTag(uint langId)
{
// We need to convert the language identifier to a language tag, because they are deprecated and may have a
// transient value.
// https://learn.microsoft.com/globalization/locale/other-locale-names#lcid
// https://learn.microsoft.com/windows/win32/winmsg/wm-inputlangchange#remarks
//
// It turns out that the LCIDToLocaleName API, which is used inside CultureInfo, may return incorrect
// language tags for transient language identifiers. For example, it returns "nqo-GN" and "jv-Java-ID"
// instead of the "nqo" and "jv-Java" (as seen in the Get-WinUserLanguageList PowerShell cmdlet).
//
// Try to extract proper language tag from registry as a workaround approved by a Windows team.
// https://github.com/dotnet/winforms/pull/8573#issuecomment-1542600949
//
// NOTE: this logic may break in future versions of Windows since it is not documented.
if (langId is (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD1
or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD2
or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD3
or (int)PInvoke.LOCALE_TRANSIENT_KEYBOARD4)
{
using RegistryKey key = Registry.CurrentUser.OpenSubKey(UserProfileRegistryPath);
if (key is not null && key.GetValue("Languages") is string[] languages)
{
foreach (string language in languages)
{
using RegistryKey subKey = key.OpenSubKey(language);
if (subKey is not null
&& subKey.GetValue("TransientLangId") is int transientLangId
&& transientLangId == langId)
{
return language;
}
}
}
}
return CultureInfo.GetCultureInfo((int)langId).Name;
}
#endregion
}
}