429354 - select (drop-down) lists not showing correctly with big font size

Status: RESOLVED DUPLICATE of bug 314939

(Core :: Layout: Form Controls, defect)

Description

[Bill]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; el; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; el; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13

When select statements with explicitly stated font-size (via style="font-size: *pt") are encountered, the vertical size of the drop-down list is not calculated correctly. As a result, the drop-down list becomes a "drop-up" list and some select options are hidden. However, if the drop-down list has enough elements for the renderer to supply a vertical scrollbar, the above does not happen.
Screen resolution on test machine was 1280x800.

Reproducible: Always

Steps to Reproduce:
see attached .html file

Comment 1

[Bill]

Attachment: Test page to reproduce the bug

Comment 2

[Bill]

Attachment: Screenshot of the drop down list not showing properly.

The "drop-up" list goes all the way up the screen.

Comment 3

[David Blancke]

Reproducible on 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008041506 Minefield/3.0pre'

Comment 4

[Jan Darmochwal]

Happens on Linux as well, can't find a dupe.
Status -> new, ALL, ALL, adjusting product and component

Comment 5

[Boris Zbarsky [:bzbarsky]]

Bug 352602 looks like a pretty direct dup...

Comment 6

[Jan Darmochwal]

Attachment: find suitable number of visible rows for drop downs with <=20 rows

The patch makes the select element figure out a suitable number of visible rows for drop downs with 20 or less rows (as already done for >20 rows).

Comment 7

[Boris Zbarsky [:bzbarsky]]

Comment on attachment 316124 [details] [diff] [review]
find suitable number of visible rows for drop downs with <=20 rows

This is basically identical to the patch with r- in bug 314939.