RFR: 8273986: JEditorPane HTML Demo - Accessibility issues [v9]

[Sergey Bylokhov]

On Thu, 16 Mar 2023 19:11:39 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

>> JAccessWalker was not able to show component tree correctly if we switch pages for HTML content. 
>> 
>> Observation:
>> The issue observed is that the children are not reported correct for root element when switching of pages happened. The reason behind it is that the `getAccessibleChildrenCount` API is called on the old `accessibleContext` object which return the children count as 0. Whenever we switch the page the children count is recalculated based on the root element but the `accessibleContext `object used to retrieve the child remains unchanged and due to that it return the children count 0.
>> 
>> Solution:
>> 
>> Added a condition check to create a new `accessibleContext `object to find out the children count correctly whenever we switch the pages in JEditorPane. 
>> 
>> Checked with the SwingSet2 JEditorPane demo and it reports well the component tree in JAccessWalker.
>> 
>> Steps to verify:
>> 
>> JBS contains the steps to reproduce the scenario.
>
> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Access Ui field on EDT

test/jdk/javax/accessibility/JEditorPane/TestEditorPaneAccessibleChildCount.java line 117:

> 115:             });
> 116: 
> 117:             if ((childCount1 != childCount2) &&

This version will update the childCount1/2 on EDT but then will use it in the main thread w/o synchronization.

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PR Review Comment: https://git.openjdk.org/jdk/pull/12707#discussion_r1145254012