1216483 - [contenteditable] cursor movement between flexbox containers is incorrect

Status: RESOLVED DUPLICATE of bug 1475232

(Core :: Layout, defect)

Description

[stef.busking]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0
Build ID: 20151015193503

Steps to reproduce:

See http://codepen.io/Bwrrp/pen/GpyrqQ for a minimal reproducable example.

The bug seems to be triggered by the use of flexbox layout inside a contenteditable element.

Place the text cursor on the last line of the first paragraph of text, then press the down arrow key to move to the second paragraph.


Actual results:

The cursor moves to (or close to) the end of the second paragraph, several lines of text below its previous position


Expected results:

The cursor should have moved to the line of text directly below its previous position, in a horizontally similar position. This does work correctly in Google Chrome.

Comment 1

[Daniel Holbert [:dholbert]]

Thanks for the bug report -- I can reproduce in latest Nightly, 44.0a1 (2015-10-19)

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: testcase 1

Here's a slightly condensed version of the reporter's codepen testcase.

Comment 3

[stef.busking]

Checking back on some older issues I reported, it looks like I'm no longer able to reproduce this one in the latest Firefox Developer Edition (122.0b3). Feel free to close.

Comment 4

[Daniel Holbert [:dholbert]]

Thanks!

Here's the fix range (via mozregression)
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=1712236ad4a08e07d74bfb03fef7fe2afeb1607a&tochange=08038e535f5829c597acade6b2b375bdb3615432

That includes the "see also" bug that was linked above -- bug 1475232 -- whose description sounds quite similar. So presumably this was fixed by that bug's patch. --> Duping.