Bug 9659

Summary:

Quirksmode: Fixed / Overflow > Positioned objects get hidden when scrolling

Product:

WebKit

Reporter:

Chris McLay <chris>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

ddkilzer, ian, joost, kevin, mitz

Priority:

Keywords:

HasReduction

Version:

420+

Hardware:

Mac

OS:

OS X 10.4

URL:

http://eeoh.com.au/bugTesting/safari_fixed_overflow_relative_scroll_bug.html

Bug Depends on:

Bug Blocks:

9610

Attachments:

Description	Flags
Simple test case example in html	none
Revised html test case	none
revised test case	none
revised test case	none
Add "fixed" flag to cached clip rects	hyatt: review+

Chris McLay

Reported 2006-06-29 23:05:53 PDT

When you have a object with a relative position, inside an object with overflow hidden, inside a fixed object, the relatively positioned object gets clipped when you scroll the page. The sample page has a simple set of examples: http://eeoh.com.au/bugTesting/safari_fixed_overflow_relative_scroll_bug.html

Attachments
Simple test case example in html (1.97 KB, application/xhtml+xml) 2006-06-29 23:07 PDT, Chris McLay	no flags	Details
Revised html test case (2.37 KB, text/html) 2006-11-20 00:35 PST, Chris McLay	no flags	Details
revised test case (4.03 KB, text/html) 2006-11-20 02:00 PST, Chris McLay	no flags	Details
revised test case (4.04 KB, text/html) 2006-11-20 04:18 PST, Chris McLay	no flags	Details
Add "fixed" flag to cached clip rects (163.94 KB, patch) 2006-12-31 02:06 PST, mitz	hyatt: review+	Details Formatted Diff Diff
Show Obsolete (3) View All Add attachment proposed patch, testcase, etc.

Chris McLay

Comment 1 2006-06-29 23:07:26 PDT

Created attachment 9099 [details] Simple test case example in html

Mark Rowe (bdash)

Comment 2 2006-07-02 02:13:52 PDT

Confirmed with WebKit r15133 and WebKit 418.8. Thanks for the test case.

Chris McLay

Comment 3 2006-11-20 00:35:04 PST

I have found an addition to this bug, as well as the original case the same things happens with an overflow hidden object, inside an overflow hidden object, inside a fixed object. I'll attach a more complete example.

Chris McLay

Comment 4 2006-11-20 00:35:56 PST

Created attachment 11579 [details] Revised html test case

Chris McLay

Comment 5 2006-11-20 02:00:11 PST

Created attachment 11580 [details] revised test case

Chris McLay

Comment 6 2006-11-20 02:03:39 PST

The bug is broader than I had thought. In addition to the original bug... If you have a positioned object, or an overflow hidden object inside a fixed object with overflow hidden then all the positioned objects get clipped on scroll.

Chris McLay

Comment 7 2006-11-20 04:18:21 PST

Created attachment 11581 [details] revised test case This revised test case includes the revised bug and some clarifying examples (hopefully). If I can simplify matters further I will...

mitz

Comment 8 2006-11-20 06:18:07 PST

*** Bug 8788 has been marked as a duplicate of this bug. ***

mitz

Comment 9 2006-12-23 00:52:56 PST

*** Bug 11937 has been marked as a duplicate of this bug. ***

mitz

Comment 10 2006-12-31 02:06:46 PST

Created attachment 12130 [details] Add "fixed" flag to cached clip rects No layout test regressions.

Dave Hyatt

Comment 11 2006-12-31 04:39:50 PST

Comment on attachment 12130 [details] Add "fixed" flag to cached clip rects r=me

David Kilzer (:ddkilzer)

Comment 12 2006-12-31 06:41:29 PST

Committed revision 18491.

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