1368960 - in <pre>, fullwidth forms not twice as wide as halfwidth counterpart

Status: UNCONFIRMED

(Core :: Layout: Form Controls, defect)

Description

[tobias]

Attachment: full-half-pre.htm

User Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0
Build ID: 20170517123028

Steps to reproduce:

Use fullwidth and halfwidth form of latin characters in the same <pre> element. 

An example is attached, or can be seen by navigating to the following page:
https://jsbin.com/tezizasomo

Stackoverflow user 'snailplane' also reproduced this bug/antifeature here:
https://japanese.meta.stackexchange.com/questions/1023/preformatted-text-in-japanese-doesnt-line-up-properly/


Actual results:

Fullwidth forms are a few pixels too narrow, therefore misaligning the characters from the grid. 


Expected results:

The fullwidth forms should be twice the width of the halfwidth forms, therefore aligning to the grid.

Comment 1

[tobias]

I forgot to mention, this is not a Firefox specific issue. I have also reproduced this in Chrome 58 (Fedora 25), as well as IE11 and Edge on a friend's Win10 computer. 

This is the Blink engine bug report: https://bugs.chromium.org/p/chromium/issues/detail?id=728142