102402 – REGRESSION (Subpixel layout): Gray vertical lines appear when moving insertion point to right on Mac

Bug 102402 - REGRESSION (Subpixel layout): Gray vertical lines appear when moving insertion point to right on Mac

Summary: REGRESSION (Subpixel layout): Gray vertical lines appear when moving insertio...

Status:	RESOLVED FIXED

Alias:	None

Product:	WebKit
Classification:	Unclassified
Component:	Layout and Rendering (show other bugs)
Version:	528+ (Nightly build)
Hardware:	Mac All

Importance:	P1 Normal
Assignee:	Emil A Eklund

URL:
Keywords:	InRadar, Regression

Depends on:
Blocks:

Reported:	2012-11-15 09:19 PST by Kosei Moriyama
Modified:	2012-12-12 15:55 PST (History)
CC List:	8 users (show)

See Also:

Attachments
test case (447 bytes, text/html) 2012-11-15 09:19 PST, Kosei Moriyama	no flags	Details
screenshot of the behavior (51.83 KB, image/png) 2012-11-15 09:21 PST, Kosei Moriyama	no flags	Details
Patch (4.62 KB, patch) 2012-12-11 14:55 PST, Emil A Eklund	no flags	Details \| Formatted Diff \| Diff
Patch (4.63 KB, patch) 2012-12-12 15:34 PST, Emil A Eklund	no flags	Details \| Formatted Diff \| Diff
Show Obsolete (1) View All Add an attachment (proposed patch, testcase, etc.)

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Description Kosei Moriyama 2012-11-15 09:19:51 PST

Created attachment 174462 [details]
test case

WIth attached html (test.html), focus the input text field and move cursor from left to right, gray vertical lines appear between characters.

I've found this behavior following browsers:

* WebKit Nightly (Version 6.0.2 (7536.26.17, 537+))
* Chrome Canary  (Version 25.0.1325.0 canary)
* Chrome Dev (Version 25.0.1323.1 dev)
* Chrome Beta (Version 24.0.1312.14 beta)

My OS version is OS X 10.7.5.

Comment 1 Kosei Moriyama 2012-11-15 09:21:24 PST

Created attachment 174463 [details]
screenshot of the behavior

Comment 2 Alexey Proskuryakov 2012-11-16 12:42:00 PST

<rdar://problem/12720748>

Comment 3 Emil A Eklund 2012-11-16 13:09:30 PST

Thanks for the reports. Do you have any idea when this started failing (i.e. last know good version)?

Comment 4 Simon Fraser (smfr) 2012-11-16 13:11:19 PST

Probably started when we enabled subpixel on Mac.

Comment 5 Emil A Eklund 2012-11-16 13:12:50 PST

(In reply to comment #4)
> Probably started when we enabled subpixel on Mac.

You are probably right. One would think that we'd have noticed it being broken in chrome/mac though.

Comment 6 Simon Fraser (smfr) 2012-11-16 13:14:21 PST

Maybe some platform code differs.

Comment 7 Emil A Eklund 2012-11-16 13:21:48 PST

(In reply to comment #6)
> Maybe some platform code differs.

Could be, I'll try to track it down early next week.

Comment 8 Emil A Eklund 2012-12-11 14:55:38 PST

Created attachment 178885 [details]
Patch

Comment 9 WebKit Review Bot 2012-12-11 16:17:58 PST

Comment on attachment 178885 [details]
Patch

Attachment 178885 [details] did not pass chromium-ews (chromium-xvfb):
Output: http://queues.webkit.org/results/15275421

New failing tests:
fast/repaint/delete-into-nested-block.html

Comment 10 Emil A Eklund 2012-12-12 15:34:10 PST

Created attachment 179136 [details]
Patch

Comment 11 Emil A Eklund 2012-12-12 15:43:48 PST

Thanks Simon!

Comment 12 Emil A Eklund 2012-12-12 15:54:55 PST

Committed r137529: <http://trac.webkit.org/changeset/137529>