WebDriver: [macOS] [Actions] [Key] Shift modifier not applying to typed text

[patrickangle]

7bee9f5

WebDriver: [macOS] [Actions] [Key] Shift modifier not applying to typed text
https://bugs.webkit.org/show_bug.cgi?id=248770
rdar://100588610

Reviewed by BJ Burg.

AppKit expects the `characters` for an NSEvent to be pre-transformed to the actual character that will be typed, which
means for a capital letter, sending the key code for a letter with the shift modifier held should result in the capital
form of that letter being the `characters`. This also add support for composed characters, like Shift+Option+K resulting
in the Apple logo, or Shift+Option+8 resulting in the degree symbol.

The clearest way to obtain the OS-defined mapping for a letter and its modifiers is to create a temporary NSEvent and
call `-[NSEvent characterTransformingModifiers:]`, which applies the provided modifiers to an existing event's
`characters`, which we can then use to create the actual NSEvents we will dispatch to the system. Alternatively, we
could hardcode WebDriver's list of "shifted" characters, but that only covers keys on a US-English keyboard, and does
not provide any allowance for macOS's various Option/Shift modified key chords to produce special characters.

This progresses the following WPT test cases:
webdriver/tests/perform_actions/key_modifiers.py::test_shift_modifier_generates_capital_letters[\ue008]
webdriver/tests/perform_actions/key_modifiers.py::test_shift_modifier_generates_capital_letters[\ue050]

* Source/WebKit/UIProcess/Automation/mac/WebAutomationSessionMac.mm:
(WebKit::WebAutomationSession::platformSimulateKeyboardInteraction):

Canonical link: https://commits.webkit.org/259039@main

f0e0e90

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	❌ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 2cef1f2)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	❌ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
⏳ 🛠 🧪 jsc-arm64	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch-sim

[burg]

Nice fix!

[webkit-early-warning-system]

EWS run on current version of this PR (hash f0e0e90)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk	✅ 🛠 wincairo
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	❌ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 259039@main (7bee9f5): https://commits.webkit.org/259039@main

Reviewed commits have been landed. Closing PR #7208 and removing active labels.