902092 - language-specific minimum font size is propagated to pages of different language in same window

Status: RESOLVED DUPLICATE of bug 687297

(Core :: Layout, defect)

Description

[MarianG]

Attachment: badimage1.png

User Agent: Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release)
Build ID: 20130806030203

Steps to reproduce:

I visited forum.softpedia.com where I am always logged in.
I leave the forum an went to https://bugzilla.mozilla.org, after that any page i visit is larger.


Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:26.0) Gecko/20100101 Firefox/26.0 ID:20130806030203 CSet: a0dd80f800e2


Actual results:

The page appears slightly bigger.


Expected results:

Pages should not change sizes.

Comment 1

[MarianG]

Attachment: difference between same page, 1st part is after visiting forum

Comment 2

[MarianG]

Attachment: zip archive contains a profile with specific pref.js file

Steps to reproduce:
Load aw98t15c profile
Navigate to 1st and 2nd bookmarks w/o closing tab.
Then open 2nd bookmark in different tab.
You should see the difference.

Comment 3

[Loic]

Are you able to reproduce the issue with a clean profile?
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 4

[MarianG]

I've created a new profile using firefox -p (manager) and it's provided in the attachment 786548 [details].
It has my custom font settings and 2 bookmarks for test purpose.

I've written a simple HTML page, and keeping provided profile (aw98t15c) just by adding 'charset=iso-8859-2' to 'meta http-equiv' I was able to make the second loaded page appear bigger.

Comment 5

[MarianG]

Attachment: html file, add/remove charset=iso-8859-2

Comment 6

[MarianG]

Basically it does not change the "minimum font size" accordingly to the new page's charset specification when it's loaded.

Comment 7

[MarianG]

Attachment: 2 HTML webpages, note about font size,

2 pages 
with charset=iso-8859-1, and 
with charset=iso-8859-2

Comment 8

[MarianG]

Attachment: page_1_good.PNG

Comment 9

[MarianG]

Attachment: page_2_good.PNG

Comment 10

[MarianG]

Attachment: page_1_bad.PNG

Comment 11

[MarianG]

Attachment: user_defined.PNG

Comment 12

[Loic]

Could you post clear STR to repro the bug, please (which website, settings to modify etc).

Comment 13

[MarianG]

Modify "minimun font size", for "Central European" (iso-8859-2) font make it a big value, so you can see.
Visit a page that use iso-8859-2 charset, then leave to a page that has iso-8859-1 charset (Western)
The page will use your western fonts, but it will keeps the font size for the iso-8859-2.

Comment 14

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

This is certainly believable.  The pres context has code to get the right language-specific min font size, and then use the max of that and its overall min-font-size.  But there's also code in the document viewer and higher than tries to preserve min font size across page navigation, and that code preserves the max()-ed font size.  (I have no idea why it tries to preserve min font size across page navigation since I'm not aware of any page-specific way to set it.)

One fix might be to fix nsDocumentViewer::GetMinFontSize to do something that gets the cross-language min font size.  That said, I'm not sure *why* we have that cross-language min font size, or what it's for.