[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2009-07-28 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697


Niklas Laxström  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||FIXED




--- Comment #27 from Niklas Laxström   2009-07-28 
15:38:48 UTC ---
Implemented solution I proposed above in r53874.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2009-06-19 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #26 from Niklas Laxström   2009-06-19 
11:49:31 UTC ---
To have something concrete I propose to add css override for languages with no
good monospace font(s). The css would use serif or sans-serif font style for
textareas. There should also be possibility to users switch back to monospaced.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-29 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #25 from Andrew Cunningham   2008-12-29 
22:38:17 UTC ---
(In reply to comment #23)

> 
> 4) That appropriate (monospaces, serif, sans-serif) fonts are available for 
> the
> language in question
> 

A clarification on my comment, with respect to monospaced fonts. It is
important to note that there are few monospaced fonts (if any) that support
various lesser used languages. And for many writing scripts monospaced fonts
are inappropriate.

Looking at windows environment for instance, you'll find that for most scripts
there isn't a monospaced font available. 

For various dubious reasons certain browsers default to monospaced fonts for
displaying text in certain html elements. This is poor internationalisation. It
doesn't scale in a truly multilingual environment.

Using generic font families can be a problem when you are developing or
maintaining a truly multilingual environment. They are useful in themes and
skins, so that the themes or skins can be made language neutral, but the themes
or skins then need to be overlaid with language specific styling to ensure that
all text has a chance of displaying.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-29 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #24 from Gerard Meijssen   2008-12-29 
13:45:39 UTC ---
That is all well and good. I do have all the appropriate fonts installed. It is
monospaced for the edit window that fails me for most browsers. When problems
are eliminated, there is at least a fighting chance of getting it right. 
Thanks, GerardM


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-29 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #23 from Andrew Cunningham   2008-12-29 
12:58:28 UTC ---
(In reply to comment #22)
> Betawiki has a gadget that allows you to cycle from monospace, to sans, to
> serif. This shows that monospace breaks the usability of some of the languages
> we support. The only logical conclusion is to change from monospace to an 
> other
> style of fonts. No catch-22 for me. If something is not usable, we use
> something else.
> 
> This WILL work for Firefox, Opera and Safari. Internet Explorer and Chrome are
> both currently broken; IE shows the wrong character Chrome shows no character.
> 

For lesser used languages, this approach assumes:

1) End users have installed all language support available within the OS.
Currently the only OS that I know of that installs all language support
available by default is Windows Vista (maybe macOS too, don't know enough about
MacOS to say). Windows XP and older versions of Widows as well as most, if not
all Linux distros only install a minimal set of language support. Full language
support has to be specified during the install or installed afterwards. 

2) End users have downloaded and installed appropriate fonts to cover all the
languages covered by Betawiki. Since lesser used languages may not be supported

3) Generic font families assume that the end user has modified the default
browser generic fonts per writing script to use appropriate fonts

4) That appropriate (monospaces, serif, sans-serif) fonts are available for the
language in question


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-27 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #22 from Gerard Meijssen   2008-12-27 
13:41:31 UTC ---
Betawiki has a gadget that allows you to cycle from monospace, to sans, to
serif. This shows that monospace breaks the usability of some of the languages
we support. The only logical conclusion is to change from monospace to an other
style of fonts. No catch-22 for me. If something is not usable, we use
something else.

This WILL work for Firefox, Opera and Safari. Internet Explorer and Chrome are
both currently broken; IE shows the wrong character Chrome shows no character.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-27 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #21 from Andrew Cunningham   2008-12-27 
12:38:27 UTC ---
(In reply to comment #20)
> MediaWiki experience with a change for Bug 1941 showed that a change FROM
> monospace removed the ability for Safari to work properly. It is likely that
> the change TO monospace for the edit screen for FireFox and IE will make these
> browsers work as well for these browsers.
> Thanks,


Although Gerard, the languages you are interested in are unlikely to be well
supported by monopaced fonts. Catch-22.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-25 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #20 from Gerard Meijssen   2008-12-25 
12:23:14 UTC ---
MediaWiki experience with a change for Bug 1941 showed that a change FROM
monospace removed the ability for Safari to work properly. It is likely that
the change TO monospace for the edit screen for FireFox and IE will make these
browsers work as well for these browsers.
Thanks,
GerardM


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #19 from Andrew Cunningham   2008-12-22 
00:07:31 UTC ---
(In reply to comment #15)
> (In reply to comment #14)

> 
> This could be done by the software, if the character combinations are supposed
> to be canonically identical.  Actually, I thought Unicode normalization was
> supposed to do that anyway, but maybe I'm wrong on that.
> 

But there are many base character + combining character combinations in the
Latin and Cyrillic scripts that do not and will never have precomposed forms

The character sequence open O + combining acute  is both the NFC
and NFD form 


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #18 from Andrew Cunningham   2008-12-22 
00:01:54 UTC ---
(In reply to comment #13)
> A solution should not be confined to the ln.wikipedia. It should also work on
> Commons or Meta. When CSS rules are supposed to be language specific, then the
> support of the CSS should be based on what language is selected in the user
> preferences. 
> 

But a user may have their preferences set to one language and may also work in
other languages. So that approach will work in many cases but not in all.

> MediaWiki is software that should work for any language. It does only need to
> specify fonts that work.

It does work for any language. But for languages not supported officially by
major OS vendors, things have always been more problematic, the advent of
Unicode doesn't change that.

There are limitations to web browsers, operating system support, and even HTML
and CSS specifications.

In an ideal world there would be comprehensive Latin script OpenType fonts
available by default within an OS. But even is there are, web browsers and CSS
provide no way to control which OpenType features are used for specific HTML
documents. So its impossible to use a single Latin script font for all Latin
script languages, even if it has language specific features and alternative
glyphs for various languages. Browsers and CSS provide no way to access or
control these features.

The best approach I've found for working with multiple scripts and languages
(and some projects i've worked with up to 100 languages) is to have the main
CSS rules be language neutral, tag primary language of a document, allow
mechanisms for authors to indicate/markup up change of languages, allow
language specific styling independent of the main styling for the theme/skin,
and allow users to override/control aspects of the language specific styling.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #17 from Andrew Cunningham   2008-12-21 
23:49:42 UTC ---
(In reply to comment #12)
> The MediaWiki default is not to specify
> fonts at all for any language.
> 

Which is actually a good approach, stylesheets should be language neutral as
much as possible.

But there are two scenarios for content:

1) all content in a single page is monolingual - in which case all is fine
2) content is predominately in one language, but contains words, phrases,
quotes from other languages - this is a more problematic scenario. Since it
would require different fonts to be used to display different languages. IN
most the major languages that have full OS support current approach works fine.
OS font-linking/switching and browser based approaches work fine. But for
lesser used languages where there is no official OS support, things become more
problematic, since different fonts may need to be specified for that language
as distinct form the text of the surrounding page. 

The easiest and simplest approach is the use of language tagging in the markup
and then users can tie their own css rules to the language markup.

Essentially the nature of Wikipedia content, means that the first fall back is
OS and web browser fallback mechanisms, the second fall back is end user CSS
overrides.

For monolingual content in a language specific wiki, its possible to have some
sensible CSS rules in a language specific customisations to monobook.css

For content that includes words and phrases in other languages, the most
sensible approach is language markup, this allows CSS rules to be created for
wiki specific monobook.css or user specific CSS rules. 


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697


Niklas Laxström  changed:

   What|Removed |Added

 CC||niklas.laxst...@gmail.com




--- Comment #16 from Niklas Laxström   2008-12-21 
15:43:36 UTC ---
(In reply to comment #15)
> (In reply to comment #14)
> > A short-term solution might be a bot replacing the combination with a single
> > character, for which there is better browser support.
> 
> This could be done by the software, if the character combinations are supposed
> to be canonically identical.  Actually, I thought Unicode normalization was
> supposed to do that anyway, but maybe I'm wrong on that.
> 

There is no single character for ɔ́, afaik.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #15 from Aryeh Gregor   2008-12-21 
15:41:34 UTC ---
(In reply to comment #14)
> The right place for such a rule were probaly the default Lingala style sheet
> ([[betawiki:MediaWiki:Common.css/ln]]).

Languages should *not* use *.css for default stylesheets (or *.js for default
JS).  They are meant *only* for user customizations.  Any language-specific
code put there will not be maintainable: changes made in MediaWiki will not
stack with user customizations, and so will not take effect on upgrade.  If
default fonts are necessary for some languages, these should be added through
some separate, specially-designed mechanism.  The only language that uses its
own CSS file right now is German, for bug 1553, and that's really not ideal
(although it's a single rule that's not likely to change or become obsolete,
much better than a list of fonts).

> A short-term solution might be a bot replacing the combination with a single
> character, for which there is better browser support.

This could be done by the software, if the character combinations are supposed
to be canonically identical.  Actually, I thought Unicode normalization was
supposed to do that anyway, but maybe I'm wrong on that.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-21 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #14 from Tisza Gergő   2008-12-21 15:26:45 UTC ---
The right place for such a rule were probaly the default Lingala style sheet
([[betawiki:MediaWiki:Common.css/ln]]).

But this is partially a browser problem: browsers (except IE, of course)
override the font set in the style sheet for characters which cannot be
displayed in that font, and should do the same for combined characters. (At
least in normal text; it's less obvious what would be the right thing to do in
an edit box where displaying multiple characters as one has its own usability
problems.)

A short-term solution might be a bot replacing the combination with a single
character, for which there is better browser support.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-20 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #13 from Gerard Meijssen   2008-12-20 
23:54:08 UTC ---
A solution should not be confined to the ln.wikipedia. It should also work on
Commons or Meta. When CSS rules are supposed to be language specific, then the
support of the CSS should be based on what language is selected in the user
preferences. 

MediaWiki is software that should work for any language. It does only need to
specify fonts that work.
Thanks,
GerardM


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-20 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697


Aryeh Gregor  changed:

   What|Removed |Added

   Severity|blocker |major




--- Comment #12 from Aryeh Gregor   2008-12-20 
23:40:51 UTC ---
(In reply to comment #11)
> For ln.wikipedia.org current css rules controlling font display would be 
> 
> #content, #bodyContent {
> font-family:'DejaVu Sans','Segoe UI','Lucida Sans Unicode','Lucida
> Grande',Tahoma,'Arial Unicode MS','Lucida Sans',Verdana,sans-serif;
> }

If those are wrong, bring it up at [[ln:MediaWiki talk:Monobook.css]], not
here.  We (developers/sysadmins) don't have control over what CSS rules sysops
choose to add for their own wikis.  The MediaWiki default is not to specify
fonts at all for any language.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-19 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #11 from Andrew Cunningham   2008-12-20 
06:04:01 UTC ---
For ln.wikipedia.org current css rules controlling font display would be 

#content, #bodyContent {
font-family:'DejaVu Sans','Segoe UI','Lucida Sans Unicode','Lucida
Grande',Tahoma,'Arial Unicode MS','Lucida Sans',Verdana,sans-serif;
}

Taking each font in turn:

DejaVu Sans - OK for Lingala
Segoe UI - I'd need to test, should be ok, but Vista font
Lucinda Sans Unicode - cannot correctly render all Lingala characters, no mark,
makmk OpenType features
Lucinda Grande - Mac OS font, don't know if this supports Lingala or not, would
need to test.
Tahoma - version 3.0.6 (on WinXP) does not support Lingala, Version 5.0 may
support Lingala, would need to test.
Arial Unicode MS - cannot correctly render all Lingala characters, no mark,
makmk OpenType features
Lucinda Sans - support for lingala unknown
Verdana - version 3.0.6 (on WinXP) does not support Lingala, Version 5.0 may
support Lingala, would need to test.

General rule of thumb for CSS font family fallback choose most appropriate
non-core fonts first, then fall back to core OS fonts

So a rule like 

#content, #bodyContent {
font-family:'DejaVu Sans','Segoe UI','Lucida Grande',Tahoma,Verdana,sans-serif;
}

would be better

Although best would be to add other download able fonts suitable for African
languages:

#content, #bodyContent {
font-family:'DejaVu Sans','Charis SIL','Gentium Book Basic','Liberation
Sans','Doulos SIL','African Sans serif','African Sans','Segoe UI','Lucida
Grande',Tahoma,Verdana,sans-serif;
}

depending on Tahoma and Verdana v. 5.0 support for Lingala, i'd be tempted to
strip these from the CSS rules, may or maynot help Vista users, but could cause
problems for users on older windows and Mac users who have an older version of
MS Office installed. 

Segoe UI and Lucinda Grande. Would need to test these when i'm back in the
Office on Monday.

Also I likes using monospaced fonts for textareas, and i find its sueful to
explicity state font rules for the textarea element, so

#content, #bodyContent, textarea {
font-family:'DejaVu Sans','Charis SIL','Gentium Book Basic','Liberation
Sans','Doulos SIL','African Sans serif','African Sans','Segoe UI','Lucida
Grande',Tahoma,Verdana,sans-serif;
}

might work better.


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-19 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #10 from Brion Vibber   2008-12-19 20:31:09 
UTC ---
In what way are they inadequate, specifically, and what would you recommend as
a change?

(Consider downloadable web fonts to be a potential option, though that brings
difficulties with it.)


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-19 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697


Andrew Cunningham  changed:

   What|Removed |Added

 CC||lang.supp...@gmail.com




--- Comment #9 from Andrew Cunningham   2008-12-19 
08:16:00 UTC ---
Assuming 
* Windows XP SP2
* Assuming complex script support enabled
* Assuming OpenType fonts with appropraite mark positioning support
* Assuming that DEjaVu Sans isn't installed

There will still be a problem

The font fallback in the css rules is inappropriate and could be considered
broken in this instance. the css rules should reflect langauge specific styling
needs.

It isn't a browser issue.

It is:

1) an end user issue: fonts and font rendering support is needed; and
2) its a wikipedia issue, assuming the end user has things set up correctly,
the css rules are inadequate

Andrew


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-18 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #8 from Brion Vibber   2008-12-19 00:24:42 UTC 
---
This is entirely dependent on the text rendering and font support of the
browser and the operating system it's running on.

Some quick tests on my boxes:

Safari 3 / Mac 10.5 -- edit good, page good
Safari 3 / Win XP -- edit good, page good

Firefox 2 / Ubuntu 7.10 -- edit good, page good
Firefox 3 / Mac 10.5 -- edit good, page good
Firefox 3 / Win XP -- edit and page both show base and comining character ok,
but incorrectly spaced (not composited into a single visible glyph)

Chrome / Win XP -- edit and page both shown with correct composition but a big
box instead of the base character

IE 7 / Win XP -- edit and page both show good base character followed by a
totally unrelated character (looks like hebrew or something, not the expected
acute accent at all!)


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-18 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697





--- Comment #7 from Gerard Meijssen   2008-12-19 
00:10:00 UTC ---
(In reply to comment #6)

Thanks Brion, both FF and Chrome show "Mbɔ́tɛ!" properly in final form on
the Wiki. http://meta.wikimedia.org/wiki/User:GerardM/Lingala IE does not. In
edit mode, FF shows the diacritic separately while Chrome does not know how to
handle it. 

So there is a difference between final form and edit.. Is there a difference in
the font support indicated by MediaWiki ?
Thanks,
 GerardM


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[Bug 16697] Unicode combining characters are difficult to edit in some browsers

2008-12-18 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=16697


Brion Vibber  changed:

   What|Removed |Added

 CC||br...@wikimedia.org
Summary|MediaWiki does not support  |Unicode combining characters
   |extended Latin script   |are difficult to edit in
   |properly|some browsers




--- Comment #6 from Brion Vibber   2008-12-18 23:53:49 UTC 
---
This "ɔ́" is a Unicode compound character, consisting of a base character
("ɔ") followed by a combining accent (" ́").

The bad news is that plenty of software is a little spotty about handling such
characters cleanly. In this case, that means the browsers and the fonts.

Pasting "ɔ́" into Firefox 3 on my Mac seems to work fine. If it's not
functioning in other current browsers, bug reports should be filed in the
appropriate locations so it can be fixed for future versions. I'm not sure
there's much else to be done on our end... working with the characters relies
on them actually being supported by the browsers!


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