1529540 - Special keys don't work on editable elements unless the `Shift` key is pressed

Status: NEW

(Remote Protocol :: Marionette, defect, P3)

Description

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Originally reported as: https://github.com/mozilla/geckodriver/issues/1508

What happens here is basically:

The problem seems to be related to pressing those special keys without having the Shift key holding down. The following is an example for Keys.HOME:

1550746708889 webdriver::server DEBUG -> POST /session/758278fc-426a-8c40-ad1e-b7f26ff00384/actions {"actions": [{"parameters": {"pointerType": "mouse"}, "type": "pointer", "id": "mouse", "actions": [{"duration": 0, "type": "pause"}, {"duration": 0, "type": "pause"}]}, {"type": "key", "id": "key", "actions": [{"type": "keyDown", "value": "\ue011"}, {"type": "keyUp", "value": "\ue011"}]}]}
1550746708898 Marionette DEBUG 0 -> [0,5,"WebDriver:PerformActions",{"actions":[{"actions":[{"duration":0,"type":"pause"},{"duration":0,"type":"pause"}],"id":"mo ... ouse"},"type":"pointer"},{"actions":[{"type":"keyDown","value":""},{"type":"keyUp","value":""}],"id":"key","type":"key"}]}]

When I modify the testcase and press/hold Shift while pressing the HOME key, all the text is getting selected up to the first character. Not sure why the cursor isn't moved without holding Shift.

Comment 2

[Julian Descottes [:jdescottes]]

See https://bugzilla.mozilla.org/show_bug.cgi?id=1722021#c2 for more investigation from GJ.

Short summary is that:

• a similar bug can be triggered by simulating an additional Left key once you are at the beginning of the editable element
• using Home on another line than the first line works fine

So it seems to be related to trying to move the cursor to the beginning of the editable.
Note that in Bug 1722021, the issue was reported on a textarea, so it's not only about contenteditable elements (although I think internally, both shared the same implementation).