[Webkit-unassigned] [Bug 131172] Mouse Cursor doesn't change appropriately.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=131172





--- Comment #18 from Miyoung Shin <myid.shin at samsung.com>  2014-07-21 01:34:02 PST ---
I'm sorry to remain the insufficient description in the change log comment.
Let me give you a explain in more details for this patch.

This is a test page's layout.
|                                          |
|                ...                       |
|     HTML & Body's Rendering box          |
|__________________________________________|
|button|     x
|______|     ↑
             |___ there isn't any element here.

Currently, we can see the 'null' value when getting the result of hitTest for MouseMove event on x coordinates, and can't update mouse cursor like other browsers if mouse cursor moves the button coordinates to the x coordinates.
I believe that the visible expectation is to change a hand pointer of mouse cursor to a general pointer.

But I met with a difficulty like below.
- Should we cope with "null" value ?
- or, Do we guarantee that hitTest shouldn't return "null" value?

According your opinion, I tried to dig out second question.
I refereed the document.elementFromPoint's behaviour because we can see HTML Element value as a result of elementFromPoint under the same conditions.
I think you've already known as far as here.

I found that in case of elementFromPoint hitTestRequest is set by "Active" option, and the hitTest result updates to HTML Element again as the hitTest's result is "null".

So, I added "Move()" flag at there to ensure HTML Element as hitTest result for MouseMove event like elementFromPoint's active() option.

In case of isMainFrame, your guess is right.
I intended to do so because this change should have effect on only main frame.
If I remove isMainFrame condition, it will have a bad effect to mouseEnter & MouseLeave event's result. Anyway, I don't think we need this change for sub frame.

Thank you for your feedback and please let me know if I'm wrong.

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