Bug 103680

Summary:

[CSS Regions] Text flickers outside of regions when resizing

Product:

WebKit

Reporter:

Rebecca Hauck <rhauck>

Component:

Layout and Rendering

Assignee:

Andrei Bucur <abucur>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

abucur, mibalan, WebkitBugTracker

Priority:

Keywords:

AdobeTracked

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

Bug Blocks:

57312

Attachments:

Description	Flags
test case to reproduce bug	none

Description Rebecca Hauck 2012-11-29 15:46:51 PST

Found in Version 25.0.1335.0 canary

1. Open the attached test file in the browser
2. Resize the window by dragging the bottom right corner (happens more reliably when you resize both horizontally & vertically at the same time, but I've seen it when doing just one direction at once, too)

Result:  The text momentarily flickers outside of the rightmost region while re-wrapping

Comment 1 Rebecca Hauck 2012-11-29 15:47:48 PST

Created attachment 176839 [details]
test case to reproduce bug

Comment 2 Andrei Bucur 2012-12-06 02:26:42 PST

The text overflowing the right region doesn't seem to repro after
http://trac.webkit.org/changeset/136793

However, what looks to be a flicker is the text in the right column "bouncing" vertically by 1/2 pixels when resizing the window. Is this a different bug?

Comment 3 Rebecca Hauck 2012-12-10 13:06:30 PST

I'm no longer seeing it flicker like I did before. I do see the slight bouncing in the right pink region though.  Should that be logged as separate bug?

Comment 4 Andrei Bucur 2012-12-10 13:33:09 PST

(In reply to comment #3)
> I'm no longer seeing it flicker like I did before. I do see the slight bouncing in the right pink region though.  Should that be logged as separate bug?

Yes. This can be either a subpixel layout problem or we don't do margin collapsing right at region breaks.

Comment 5 Andrei Bucur 2012-12-12 09:09:02 PST

(In reply to comment #4)
> (In reply to comment #3)
> > I'm no longer seeing it flicker like I did before. I do see the slight bouncing in the right pink region though.  Should that be logged as separate bug?
> 
> Yes. This can be either a subpixel layout problem or we don't do margin collapsing right at region breaks.

I've submitted a new bug: https://bugs.webkit.org/show_bug.cgi?id=104816

*** This bug has been marked as a duplicate of bug 103993 ***