Bug 125392 – REGRESSION(r136280): input[type=image] should assume coords of 0,0 when activated without physically clicking

• Component: Forms
• Status: RESOLVED FIXED

[Ryosuke Niwa]

Activating an image button with the keyboard or element.click() should result in selected coords of (0,0). This is consistent with the spec and IE and Firefox.

The relevant spec is:
"If the user activates the control without explicitly selecting a coordinate, then the coordinate (0,0) must be assumed."
http://www.whatwg.org/specs/web-apps/current-work/multipage/states-of-the-type-attribute.html#image-button-state-(type=image)

https://code.google.com/p/chromium/issues/detail?id=306392

[Ryosuke Niwa]

Created attachment 218660 [details]
Merges the patch

[Darin Adler]

Comment on attachment 218660 [details]
Merges the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=218660&action=review

> Source/WebCore/html/ImageInputType.cpp:96
> +static IntPoint clickLocationForEvent(Event& event)
> +{
> +    if (!event.underlyingEvent())
> +        return IntPoint();
> +
> +    Event& underlyingEvent = *event.underlyingEvent();
> +    if (!underlyingEvent.isMouseEvent())
> +        return IntPoint();
> +
> +    MouseEvent& mouseEvent = toMouseEvent(underlyingEvent);
> +    if (mouseEvent.isSimulated())
> +        return IntPoint();
> +
> +    return IntPoint(mouseEvent.offsetX(), mouseEvent.offsetY());
> +}

This is not a very good standalone function. The function relies on the fact that the event passed to it is not itself a mouse event, and instead goes right at the underlying event. A general purpose function would want to handle the case where the event itself was a mouse event, and also arguably needs a loop that keeps following underlyingEvent pointers until it finds a mouse event.

I understand the desire to make ImageInputType::handleDOMActivateEvent more elegant by factoring out the code, but the code was specific to DOM activate in a subtle way.

[Ryosuke Niwa]

Committed r160337: <http://trac.webkit.org/changeset/160337>