[OpenJDK 2D-Dev] RFR: 8261231: Windows IME was disabled after DnD operation

[Sergey Bylokhov]

On Sun, 7 Feb 2021 08:29:57 GMT, Dmitry Markov <dmarkov at openjdk.org> wrote:

> The function InvokeInputMethodFunction() is responsible for invocation of IME API. Typically it uses PostMessage() to execute corresponding IME function on the toolkit thread but if DnD operation takes place SendMessage() is used. The state of m_inputMethodWaitEvent event object remains signalled after SendMessage() execution. That causes failure of subsequent IME functions calls via PostMessage().
> 
> Fix:
> SendMessage() and PostMessage() calls inside InvokeInputMethodFunction() should be synchronised. The state of m_inputMethodWaitEvent event object must be reseted right after SendMessage() execution.

Marked as reviewed by serb (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/2448