[Bug 578039] New: lang-specific overrides rule doesn't work as expected

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Summary: lang-specific overrides rule doesn't work as expected

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Summary: lang-specific overrides rule doesn't work as expected
           Product: Fedora
           Version: rawhide
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: medium
          Priority: low
         Component: lohit-tamil-fonts
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
         QAContact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail]
        Depends on: 578015
            Blocks: 507684
    Classification: Fedora
    Target Release: ---

Description of problem:
All of detailed information is available on my post at the fonts list:
http://lists.fedoraproject.org/pipermail/fonts/2010-March/001117.html

binding="same" in the fontconfig config file prevents to apply the rule for the
specific
language only properly. As a result, fonts is used for non-targetted languages
and it may gives different look and feel in some cases.

I'd propose to get rid of binding="same" from:
 66-lohit-tamil.conf

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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https://bugzilla.redhat.com/show_bug.cgi?id=578039

--- Comment #1 from Fedora Update System  2010-04-19 05:03:39 EDT ---
lohit-tamil-fonts-2.4.5-3.fc13 has been submitted as an update for Fedora 13.
http://admin.fedoraproject.org/updates/lohit-tamil-fonts-2.4.5-3.fc13

[Bug 578039] lang-specific overrides rule doesn't work as expected

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comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Pravin Satpute  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |MODIFIED

--- Comment #2 from Pravin Satpute  2010-04-19 05:10:23 EDT ---
fixed in lohit-tamil-fonts-2.4.5-3.fc14

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |ON_QA

--- Comment #3 from Fedora Update System  2010-04-20 09:17:16 EDT ---
lohit-tamil-fonts-2.4.5-3.fc13 has been pushed to the Fedora 13 testing
repository.  If problems still persist, please make note of it in this bug
report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update lohit-tamil-fonts'.  You can
provide feedback for this update here:
http://admin.fedoraproject.org/updates/lohit-tamil-fonts-2.4.5-3.fc13

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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https://bugzilla.redhat.com/show_bug.cgi?id=578039

--- Comment #4 from Akira TAGOH  2010-04-22 07:35:35 EDT ---
Testing result:
# rpm -q lohit-tamil-fonts
lohit-tamil-fonts-2.4.5-3.fc13.noarch
# fc-match monospace:lang=en
DejaVuSansMono.ttf: "DejaVu Sans Mono" "Book"
# fc-match monospace:lang=en-us
DejaVuSansMono.ttf: "DejaVu Sans Mono" "Book"
# fc-match monospace:lang=ta
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"
# fc-match monospace:lang=ta-in
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"
# fc-match serif:lang=en
DejaVuSerif.ttf: "DejaVu Serif" "Book"
# fc-match serif:lang=en-us
DejaVuSerif.ttf: "DejaVu Serif" "Book"
# fc-match serif:lang=ta
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"
# fc-match serif:lang=ta-in
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"

No explicit rules for monospace nor serif in lohit-tamil-fonts.

# fc-match sans:lang=en
DejaVuSans.ttf: "DejaVu Sans" "Book"
# fc-match sans:lang=en-us
DejaVuSans.ttf: "DejaVu Sans" "Book"
# fc-match sans:lang=ta
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"
# fc-match sans:lang=ta-in
Lohit-Tamil.ttf: "Lohit Tamil" "Regular"

that looks good.

# for i in $(ls /usr/share/locale|grep -v -E "^ta$"); do fc-match
sans:lang=$i|grep "Lohit Tamil"; [ $? = 0 ] && echo $i; done
#

No affects to other languages. comfirmed the updated package works fine.

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

--- Comment #5 from Fedora Update System  2010-04-25 09:48:59 EDT ---
lohit-tamil-fonts-2.4.5-3.fc13 has been pushed to the Fedora 13 stable
repository.  If problems still persist, please make note of it in this bug
report.

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

Please do not reply directly to this email. All additional
comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |CLOSED
   Fixed In Version|                            |lohit-tamil-fonts-2.4.5-3.f
                   |                            |c13
         Resolution|                            |ERRATA

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

Please do not reply directly to this email. All additional
comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Akira TAGOH  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |586867

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

Please do not reply directly to this email. All additional
comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

Bug 578039 depends on bug 578015, which changed state.

Bug 578015 Summary: l10n-font-template.conf doesn't work as expected
https://bugzilla.redhat.com/show_bug.cgi?id=578015

What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
             Status|ASSIGNED                    |MODIFIED
         Resolution|                            |CURRENTRELEASE
             Status|MODIFIED                    |CLOSED

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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comments should be made in the comments box of this bug.

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K. Sethu  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #6 from K. Sethu  2010-08-04 12:17:55 EDT ---
I tested in Fedora 13 for the impact of the following change in
66-lohit-tamil.conf introduced on April 19, 2010 by Pravin :

-  <edit name="family" mode="prepend_first" binding="same">
+  <edit name="family" mode="prepend">

(Patch ref: http://web.archiveorange.com/archive/v/yFlHamCSaVYjcOo7xFxD )

With mode="prepend" as it is in current versions, I find the following :

1) The current 66-lohit-tamil.conf does not supersede 65-nonlatin.conf for
"sans-serif".  65-nonlatin.conf has TSCu_Paranar font at priority above Lohit
Tamil;  and so if TSCu_Paranar Regular and / or TSCu_Paranar Bold are fonts are
installed then for sans-serif TSCu_Paranar regular is matched by fontconfig if
Regular only or both Regular and Bold are installed. If only Bold is installed
then it is matched to sans-serif.   Only if both regular and bold of
TSCu_Paranar are NOT installed then Lohit Tamil gets matched to sans-serif.

2) Similarly if gnu-free fonts are installed then due to
60-gnu-free-serif.conf, for serif, it is FreeSerif font that is matched by
fontconfig.

Note: To check what fontconfig matches to the 3 genric fonts : mono, serif and
sans-serif as well as best font for any font being not categorised as one those
three, the 4 commands I use are as follows:

fc-match :lang=ta:family=mono
fc-match :lang=ta:family=serif
fc-match :lang=ta:family=sans
fc-match :lang=ta

For Tamil fonts the 3rd and 4th of the above would always yield identical
results.

Next, if the 66-lohit-tamil.conf is with mode="prepend_first" binding="same"  
or mode="prepend_first" (without the binding="same"), then in each of these
cases I find for all the 4 above commands, "Lohit Tamil" is the result even if
TSCu_Paranar and FreeSerif fonts are installed.

Now the issues I have:

What was the intended purpose of 66-lohit-tamil.conf ?

If it is meant to supersede all configs above in the file links (in the
/etc/fonts/conf.d  directory) with names starting with number 65 or less to
match all 3 generic fonts with Lohit Tamil, then mode="prepend" fails but
mode="prepend_first" works right (even without binding="same").

If it is meant to supersede all configs above, only for the case of sans-serif
to match with with Lohit Tamil, then  "mode=prepend" fails and 
"mode=prepend_first" works right for sans-serif but it also does unintended
matches for mono and serif.

As I understand now, the current 66-lohit-tamil.conf does not serve any
purpose. Seek your clarifications please.

K. Sethu

[Bug 578039] lang-specific overrides rule doesn't work as expected

[Red Hat Bugzilla]

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comments should be made in the comments box of this bug.

https://bugzilla.redhat.com/show_bug.cgi?id=578039

--- Comment #7 from Pravin Satpute  2010-08-05 00:25:54 EDT ---
reported a new bug https://bugzilla.redhat.com/show_bug.cgi?id=621445