[Webkit-unassigned] [Bug 43020] New: IME Composition events are handled inconsistently in each port

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=43020

           Summary: IME Composition events are handled inconsistently in
                    each port
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: joone at kldp.org


All ports of WebKit handles composition & textEvent events in inconsistent ways. 
In addition, keyboard events are still dispatched to the DOM during a composition.

According to W3C DOM Level 3 events,
1) A browser should fire compositionstart, compositionupdate, and compositionend event during a composition.
2) The textEvent event should be dispatched after a compositionend event if the composition has not been canceled.
3) While a composition session is active, keyboard events should not be dispatched to the DOM (i.e., the text composition system "swallows" the keyboard events), and only compositionupdate events may be dispatched to indicate the composition process.

Therefore, it is necessary to fix the problems as follows:
1) IME Composition events should be handled consistently in all ports of WebKit.
2) Keyboard events should not be dispatched during a composition.
3) The textInput event should be dispatched after a compositionend event.

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