On 3/23/14, 10:22 PM, Ehsan Akhgari wrote:
On 2014-03-23, 6:07 AM, Robert O'Callahan wrote:
On Fri, Mar 21, 2014 at 9:55 PM, Patrick Brosset
<[email protected]>wrote:
We're struggling with a limitation related to the devtools highlighter
(the outline you see in this video:
https://www.youtube.com/watch?v=zBYEg40ByCM).
Today, the highlighter is created with XUL nodes that are appended
in the
browser XUL markup, in one of the parent elements of the page currently
being inspected. These XUL nodes are absolutely positioned over the
element
being highlighted.
This technique has served us well until we wanted our devtools to
work on
Fennec, Fxos and E10S mode. In these cases, the page being inspected
doesn't have a reachable parent element that we can use to append our
highlighter elements, and appending it inside the content page
itself isn't
really a viable option because we don't want to impact the content
in any
way.
I think you need an API to add anonymous content to the root element
of the
page. We don't have such an API at the moment but it might not be
hard to
add.
Bug 924692 is making the canvas frame have a native anonymous content.
If that is where you would like to stick that element in, then art of
the frame constructions bits is being done in that bug.
Cheers,
Ehsan
Bug 924692 landed yesterday so I thought this would be a good time to
revive this thread.
So with this bug, there's now a way to insert anonymous content in the
canvas frame, which is awesome.
From what I understood looking at the bug and code, I can see 2 things
potentially missing for the devtools highlighter use case:
- the code that creates the anonymous content seems pretty specifically
tied to the touch caret and it doesn't seem possible as of now to insert
any content,
- I don't think this can be accessed by privileged JS code yet.
I wanted to file a bug to address these 2 points, but wanted to check
here first.
Cheers,
Patrick
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