1294239 - Size attribute of select elements is incompatible with Kannada language.

Status: NEW

(Core :: Layout: Form Controls, enhancement, P4)

Description

[Zane Tu]

Attachment: More than 5 options are visible.

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Steps to reproduce:

Open https://jsfiddle.net/tj2bpy3g/ in Firefox 48.0-1 on Debian sid. 

Test code (screenshot attached): 

<select size="5">
  <option>1</option>
  <option>2</option>
  <option>3</option>
  <option>4</option>
  <option>5</option>
  <option>6</option>
  <option>7</option>
  <option>8</option>
  <option>9</option>
  <option value="kn-IN">Kannada (India) - ಕನ್ನಡ (ಭಾರತ)</option>
</select>


Actual results:

The number of visible options was 6. 


Expected results:

The number of visible options should have been 5. 

Additional info: 
The number of visible options is 5 on Chrome 52.0.2743.82 (64-bit), as expected.

Comment 1

[Mats Palmgren (inactive)]

For the jsfiddle link above, I see 7 visible options in Chrome Version 62.0.3188.2 on Linux.

Comment 2

[Mats Palmgren (inactive)]

Attachment: Testcase

Looks like we handle this testcase roughly the same as Chrome.

Comment 3

[Mats Palmgren (inactive)]

It's not clear to me if we should try to improve this or not.
It requires a lot more testing of various cases comparing our
rendering with other UAs before we change anything, to avoid
causing web-compat issues.  In any case, this issue seems minor.