[Webkit-unassigned] [Bug 167880] New: WebKit provides a keypress event with wrong which/keyCode/charCode directly after a composition started with ^, =?UTF-8?Q?=C2=B4?=, ` completes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=167880

            Bug ID: 167880
           Summary: WebKit provides a keypress event with wrong
                    which/keyCode/charCode directly after a composition
                    started with ^,´,` completes
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: macOS 10.12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Carsten.driesner at open-xchange.com

Entering text into a contenteditable=true HTML element by pressing one of the keys ^, ´, ` on the Mac (German keyboard) starts a composition session. If one presses a second key which won't create a single character with the first one (e.g. â), the following keypress event contains the data of the key that started the composition (not the data of the pressed key).

Example:
Use the web page www.danilatos.com/event-test/ExperimentTest.html which records the events that the browser provides if one enter text into a div with contenteditable=true.

1. Set the cursor into the "Editing" field
2. Press ´ which starts the composition
3. Press v which ends the composition
4. Look at the event recorded

You can see the following events (part of the whole event list):
...
keyup 86 (V)
input
DOMSubtreeModified
DOMCharacterDataModified
dom axctually changed
textInput
keypress 180 (´)
keydown 86 (V)
input
DOMSubtreeModified
DOMCharacterDataModified
dom actually changed
DOMSubtreeModified
DOMCharacterDataModified
dom actually changed
textInput
compositionend
...

The issue is related to the keypress event which reports that ´ was entered although V (correctly reported by keydown/keyup) would be correct. The properties which, keyCode, charCode contain the value of the compositionend data property. If one would use ^ to start the composition the following keypress event would contain 94 (^).

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