252199 - Table layout is broken when window is tall or expanded. Duplicate rows, added space.

Status: RESOLVED WORKSFORME

(Core :: Layout: Tables, defect)

Description

[Jeff Veit]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040707 Firefox/0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040707 Firefox/0.8

If you view www.tanasity.com/tablebug.html in small window, then it's correctly
layed out. However if you expand the window vertically, or you view it in a
window that's got an active area that's greater than about 500px, the table
layout code introduces phantom blank rows, or duplicates rows.

The page works on IE5.5. It's conceivable that the rendering with blank lines is
 reasonable, though it seems best to expand rows with 1x1 images to make up
missing table space.

Problem is present in Mozilla 1.5, and Firefox 0.92. Didn't test other versions
of either.



Reproducible: Always
Steps to Reproduce:
1. View web page www.tanasity.com/tablebug.html in a small browser window.
2. Drag the window vertically so that the active area > 500 px
3. Watch the dancing table.

Actual Results:  
Table layout jumps dynamically, with extra vertical space introduced at unusual
places as you resize. As you resize, some rows (ones with purple spacers) are
repeated.

Expected Results:  
Should have rendered the table as a coherent whole. Extra space in the table
should have been assigned to rows filled with 1x1 images or non-breaking spaces.

I'll build a testcase if a QA tester confirms it's an issue. 

Have looked for a work-around. Can only work around this problem by setting a
fixed vertical size to the table. Yech.

Comment 1

[Boris Zbarsky [:bzbarsky]]

It looks like an issue (I see the blank rows).. a minimal testcase would indeed
be most helpful.

Comment 2

[Jason Barnabe (np)]

Attachment: testcase

Comment 3

[Jason Barnabe (np)]

Confirming on Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3)
Gecko/20040925 Firefox/0.10

Comment 4

[Boris Zbarsky [:bzbarsky]]

Attachment: Slightly smaller testcase

Removing any more rows causes the bug to disappear....

Comment 5

[Jason Barnabe (np)]

(In reply to comment #4)
> Created an attachment (id=160899)
> Slightly smaller testcase
> 
> Removing any more rows causes the bug to disappear....

On my 800px tall screen, I can't see the bug in the new testcase if the window
is maximized. Slightly less than maximum size shows the bug, and much smaller
makes it disappear again.

Comment 6

[Bernd]

this is wfm with any window height

Comment 7

[Boris Zbarsky [:bzbarsky]]

Can we add a test for this?