1289537 - The new eyedropper cannot move outside of document

Status: RESOLVED WONTFIX

(DevTools :: General, defect, P3)

Description

[magicp]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0
Build ID: 20160623154057

Steps to reproduce:

1. Start Nightly
2. Go to any sites (e.g. about:home)
3. Open DevTools > Inspector
4. Run new eyedropper and move to nav-bar


Actual results:

The new eyedropper cannot move outside of document


Expected results:

The new eyedropper can move inside of the browser window.

Comment 1

[magicp]

Regression range:
https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=e0bc88708ffed39aaab1fbc0ac461d93561195de&tochange=a7a882d122e36defe6c2a102a28ae7dfc16311c5

Comment 2

[Julian Descottes [:jdescottes]]

FWIW, this limitation is known and was discussed in the original bug : https://bugzilla.mozilla.org/show_bug.cgi?id=1262439#c2

Comment 3

[Patrick Brosset <:pbro>]

This was indeed a known limitation when we started to work on the new implementation of the eyedropper.
Because we're not using XUL anymore, we can't use floating XUL panels (which can extend out of the bounds of the browser) and instead the eyedropper is injected as a devtools highlighter [1] into the page, therefore constraining it to the page's bounds.

I don't think this is a regression worth fixing, and we wouldn't be able to fix it with the new implementation. So marking as WONTFIX based on this.

[1] https://wiki.mozilla.org/DevTools/Highlighter