[Webkit-unassigned] [Bug 174782] New: KeyboardEvent#key reports lowecase letter with Shift+Cmd

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174782

            Bug ID: 174782
           Summary: KeyboardEvent#key reports lowecase letter with
                    Shift+Cmd
           Product: WebKit
           Version: Safari 10
          Hardware: Macintosh
                OS: macOS 10.12.4
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: keithamus at github.com

KeyboardEvent#key is supposed to report the key character that was pressed. The spec - specifically 5.3.2 "modifier keys" (https://www.w3.org/TR/uievents/#keys-modifiers) shows that if the `shiftKey` is true, then the `event.key` value should be in its "shifted state" - this includes when pressed in combination with other keys - for example `metaKey` (in Example 24 (https://www.w3.org/TR/uievents/#example-aa6d4cea) they use `ctrlKey` and `shiftKey`).

Safari misreports this, contrary to other browsers. An example:

```
// Pressing Shift+P results in:
event.shiftKey && event.key === 'P'

// Pressing Ctrl+Shift+P results in:
event.ctrlKey && event.shiftKey && event.key === 'P'

// Pressing Cmd+Shift+P results in:
event.metaKey && event.shiftKey && event.key === 'p' // lowercase, incorrect
```

To compare Firefox, Chrome, report the following:
```
// Pressing Shift+P results in:
event.shiftKey && event.key === 'P'

// Pressing Ctrl+Shift+P results in:
event.ctrlKey && event.shiftKey && event.key === 'P'

// Pressing Cmd+Shift+P results in:
event.metaKey && event.shiftKey && event.key === 'P' // uppercase, correct
```

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