[webkit-gtk] hovering-over-link signal and HitTestResult in WebKit2 API

Carlos Garcia Campos cgarcia at igalia.com
Fri Jan 27 06:04:29 PST 2012

El vie, 27-01-2012 a las 14:56 +0100, Carlos Garcia Campos escribió:
> Looking at liferea code I've noticed that they use
> WebKitWebView::hovering-over-link signal (ephy uses it too). This signal
> comes from ChromeClient::mouseDidMoveOverElement() and I was wondering
> whether it would be useful to expose it as a general signal in the API,
> instead of just for links. ChromeClient::mouseDidMoveOverElement
> receives a HitTestResult, in WebKit1 we are checking whether it's a link
> or not and then emitting WebKitWebView::hovering-over-link in case it's
> a link. In WebKit2 mouseDidMoveOverElement is a callback of the UI
> Client, that also receives a HitTestResult, so what do you think about
> exposing WebKitWebView::hovering-over-element?
> That also made me think about how to expose HitTestResult in the API. In
> WebKit1 it's only used by webkit_web_view_get_hit_test_result() (it
> sounds like a getter, but it actually performs a hit test and returns
> the result). In WK2 there's no API to make a hit test from the UI
> process, and I'm not sure it's actually needed. However, I think a
> HitTestResult object can be useful in the API, probably with a different
> name WebKitWebElement or something like that. This could be passed as an
> argument to the WebKitWebView::hovering-over-element signal, and it
> could be used for the context menu API. 
> We could use a similar approach than WK1 HitTestResult object, it has
> flags to get information about the hoevered thing (whether it's a link,
> or image, or text selected, whether the area is editable, etc.) and the
> uri or the image, link or media. It also has the inner node, we can add
> later once we have DOM bindings in WK2. 
> What do you think?

ah! I forgot to say that mac exposes it as mouseDidMoveOverElement in
the UI delegate passing the hit test result as a NSDictionary.

Carlos Garcia Campos
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