[Keyboard] Analyze keyboard layout and enforce mandatory logical keys #100456

We should change the algorithm of deriving logical keys on Web, macOS, and Linus, so that they're more intuitive to use.

This aims to resolve the following problems:

• Shift-Digit keys are broken. For example, physical Shift-Digit1 produces logical ShiftLeft + exclamation. Related:
  • Shift-Digit Shortcuts are broken on macOS #90167
  • [MacOS] LogicalKeyboard involving shift key throws error: Physical key for LogicalKeyboardKey not found in macos physical key map #96022
• Digit keys are broken on French layout. For example, physical Digit1 produces logical ampersand.
• Letter keys are broken on Russian layout. For example, physical keyA produces logical ф. Related:
  • Hot key doesn't work in MacOS when I use Russian keyboard #59065

Although it is still technically possible to define shortcuts for such scenarios, doing so requires platform- and language- dependent code, which is both unintuitive and cumbersome.

The goal can be demonstrated by the following table:

This is specially critical to non-latin layout users (such as Cyrillic letters) because their keyboard currently can not use any shortcuts, including Ctrl-C, Ctrl-V, Ctrl-A, etc.

You might ask: Then how do I know that Shift-1 is an exclamation mark? Fear not. You can still get it from {Raw,}KeyEvent.character. However, this means you can not define shortcuts for Shift-exclamation or simply exclamation for US layout anymore. This might be resolved by adding another field to {Raw,}KeyEvent, but I'm still unsure whether to do so.

Progress

• Windows: doesn't need it.
• macOS
• Linux/GTK
• Web
• iOS
• Android: doesn't need it