1260803 - Unicode in title of tab doesn't hide properly as tab size shrinks

Status: RESOLVED DUPLICATE of bug 898984

(Core :: XUL, defect)

Description

[nicholashuber]

Attachment: not showing unicode.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0
Build ID: 20160328030215

Steps to reproduce:

Have a title with unicode in it showing in a tab. Add more tabs or shrink the firefox window until it starts truncating characters. The unicode character will turn into a square with numbers/letters in it before disappearing as it shrinks further


Actual results:

Unicode character changed before it was hidden


Expected results:

The unicode character should be hidden completely or shown completely

Comment 1

[nicholashuber]

Attachment: showing unicode.png

Comment 2

[:Gijs (he/him)]

If anything this is a XUL / gfx bug. Tabbed browser is not doing anything special, it's just using XUL crop the way it's designed to be used. I vaguely recall there being existing bugs about this, Jonathan, do you know?

Comment 3

[Jonathan Kew [:jfkthame]]

The cropping support in the XUL nsTextBoxFrame code is fundamentally i18n-hostile. We need to throw it away and replace it with something akin to -- probably built on top of -- the nsTextFrame code; see bug 898984 (and others, I think).

(A possible workaround here: if tab titles were modified to put the text inside an HTML <div> with text-overflow:ellipsis, things would probably be a lot better. But I don't know how feasible that might be.)