Wrong events coordinates in iFrames

[sadym-chromium]

In input.performActions command, with origin: "viewport" and context of iframe, the wrong coordinates are used.

• The WebDriver specification get coordinates relative to an origin requires the coordinates to be used are relative to the provided context's viewport.
• The Mapper uses CDP method Input.dispatchMouseEvent, which uses coordinated "relative to the main frame's viewport".

Repro: test_move_to_origin_position_within_frame.

[sadym-chromium]

We can try to traverse up the frame tree and try to get the frame offset. This approach wouldn't work for shadow tree though

[whimboo]

But the Shadow DOM doesn't have its own viewport. It's sharing it with the viewport of the main document. Or am I wrong? But it could happen that there is an iframe within the Shadow DOM which indeed would have to be taken into account. I don't think that we have a test case for that yet.