[NTG-context] RTL section heads

Hans Hagen pragma at wxs.nl
Wed Apr 13 09:20:07 CEST 2016


On 4/13/2016 4:15 AM, Otared Kavian wrote:
> Hi Hans and Mohammad Reza,
>
> I can confirm that the wrong behaviour of numbers and digits in Right to Left (more specifically Persian) is recent: indeed with
>
> 	ConTeXt  ver: 2015.05.18 12:26 MKIV current  fmt: 2015.6.18  int: english/english
>
> from TeXLive 2015 the numbers and digits are rendered as they should. Is it related to some changes in LuaTeX?

maybe a bug .. i'll check it

> Best regards: OK
>
>> On 13 Apr 2016, at 02:46, Mohammad Hossein Bateni <bateni at gmail.com> wrote:
>>
>> Unfortunately when I use method=two for bidi, the numbers in the main body are written from right to left.  I'm starting to wonder whether it does anything nontrivial at all.
>>
>> \usemodule[simplefonts]
>> \setmainfont[ALM Fixed][features=arabic,range=arabic]
>>
>> \setupdirections[bidi=global,method=two]
>> \setupalign[r2l]
>>
>> \starttext
>>
>> سال ۲۰۱۶
>>
>> 2016
>>
>> \stoptext
>>
>>
>> I'm pretty sure this used to work (for example in version 2016.01.18 22:21).  A similar piece of code is working fine on the website.  I'm using CONTEXT version: 2016.04.01 13:01.  I also verified that it is not working in version: 2016.04.10 23:52.
>>
>> On Mon, Apr 11, 2016 at 11:47 AM, Mohammad Hossein Bateni <bateni at gmail.com> wrote:
>> Thanks, Hans!  This does solve the problem with the list of numbers.  And actually if I add a numberstyle field, I can the section heads the way I like.  Here is the setup that worked.  (I will update Wiki later.)
>>
>> \setupdirections[bidi=global,method=two]
>> \setupalign[r2l]
>>
>> \def\LTR#1{{\lefttoright#1}}
>> \def\leftpersiandecimals#1{\LTR{\persiandecimals{#1}}}
>> \defineconversion[leftpersiandecimals][\leftpersiandecimals]
>> \setuphead[chapter,title,section,subject] [conversion=leftpersiandecimals,numberstyle=\righttoleft]
>>
>> \defineseparatorset[dashsep][-,-,-,-]
>> \setuphead[section][sectionseparatorset=dashsep]
>>
>> On Mon, Apr 11, 2016 at 10:46 AM, Hans Hagen <pragma at wxs.nl> wrote:
>> On 4/11/2016 4:25 AM, Mohammad Hossein Bateni wrote:
>> Hans & Wolfgang,
>>
>> Do you have suggestions here?  How can I get the behavior I want for the
>> section head numbers?
>>
>> In fact, the following may be quite relevant.
>>
>> \usemodule[simplefonts]
>> \setmainfont[ALM Fixed][features=arabic,range=arabic]
>>
>> \setupdirections[bidi=global,method=default]
>> \setupalign[r2l]
>>
>> \starttext
>>
>> اعداد ۱، ۲، ۳ و ۴ را در نظر بگیرید.
>>
>> اعداد 1، 2، 3 و 4 را در نظر بگیرید.
>>
>> اعداد 1, 2, 3 و 4 را در نظر بگیرید.
>>
>> \stoptext
>>
>>
>> I expect the numbers 1, 2, 3 and 4 to appear in the same order from
>> right to left.  However, the visual order that I observe (regardless of
>> whether I use Persian digits or English digits, or whether I use Persian
>> or English commas) is 4, 1, 2, 3 (from left to right).  Is this a bug in
>> the bidi code?  If so, are there any workarounds?
>>
>> method=two
>>
>> Thanks,
>> Hossein
>>
>> On Fri, Apr 8, 2016 at 5:20 PM, Mohammad Hossein Bateni
>> <bateni at gmail.com <mailto:bateni at gmail.com>> wrote:
>>
>>      Hi,
>>
>>      This is concerning an RTL text.  I have one chapter and 10 sections
>>      under that.  My goal is to achieve the following.
>>      1) The number 10 should appear correctly with '1' visually to the
>>      left of '0'.
>>      2) The chapter number should visually appear to the right of the
>>      section number.
>>      3) Chapter and section numbers should be separated with a dash.
>>        (This is ignored in this email and I will follow up about it in
>>      another thread.  To get a minimal working example, I also do not try
>>      to change the numbers to use Persian digits.)
>>
>>      In particular, the headings will be visually something like the
>>      following (aligned to the right).
>>      elpmas 1
>>      txet 1-1
>>      txet 2-1
>>      txet 3-1
>>      ...
>>      txet 10-1
>>
>>      Here's the first attempt.
>>
>>      %% Attempt 1
>>      \setupalign[r2l]
>>
>>      \starttext
>>      \placecontent
>>
>>      \chapter{sample}
>>      \dorecurse{10}{\section{text}}
>>      \stoptext
>>
>>      The result is:
>>      elpmas 1
>>      txet 1-1
>>      ...
>>      txet 01-1
>>
>>
>>      Then I add "\setupdirections[bidi=global,method=default]" to the
>>      beginning and I get the most strange result (number right-aligned
>>      but texts left-aligned):
>>      sample                                    1
>>      text                                       1.1
>>      ...
>>      text                                     1.10
>>
>>
>>      A third attempt gives almost what I want (without period as the
>>      separator).
>>
>>      %% Attempt 3
>>      \setupalign[r2l]
>>
>>      \def\LTR#1{{\lefttoright#1}}
>>      \def\leftnumbers#1{\LTR{\numbers{#1}}}
>>      \defineconversion[leftnumbers][\leftnumbers]
>>      \setuphead[chapter,title,section,subject] [conversion=leftnumbers]
>>
>>      \starttext
>>      \placecontent
>>
>>      \chapter{sample}
>>      \dorecurse{10}{\section{text}}
>>      \stoptext
>>
>>
>>      The big problem is that in my RTL documents, I always have the
>>      setupdirections command, which messes things up here.  (This makes
>>      it difficult to one section name with English title, which should
>>      still be typeset on the right-hand side of the page.)  Note that in
>>      attempt 2 above, there were two issues:
>>      (1) Text and numbers appeared on the two far ends of the screen
>>      instead of being close to each other.  This does not happen when I
>>      use Farsi text.
>>      (2) Chapter number appears to the left of section number.
>>
>>
>>      %% Attempt 5
>>      \usemodule[simplefonts]
>>      \setmainfont[ALM Fixed][features=arabic,range=arabic]
>>
>>      \setupdirections[bidi=global,method=default]
>>      \setupalign[r2l]
>>
>>      \starttext
>>      \placecontent
>>
>>      \chapter{نمونه}
>>      \dorecurse{10}{\section{متن}}
>>      \stoptext
>>
>>
>>      Interestingly the table of contents looks fine if I put the number
>>      inside an LTR macro; still in the main body, the section heads are
>>      typeset incorrectly.
>>
>>      %% Attempt 6
>>      \usemodule[simplefonts]
>>      \setmainfont[ALM Fixed][features=arabic,range=arabic]
>>
>>      \setupdirections[bidi=global,method=default]
>>      \setupalign[r2l]
>>
>>      \def\LTR#1{{\lefttoright#1}}
>>      \def\leftnumbers#1{\LTR{\numbers{#1}}}
>>      \defineconversion[leftnumbers][\leftnumbers]
>>      \setuphead[chapter,title,section,subject] [conversion=leftnumbers]
>>
>>      \starttext
>>      \placecontent
>>
>>      \chapter{نمونه}
>>      \dorecurse{10}{\section{متن}}
>>      \stoptext
>>
>>
>>      I guess the solution is to get the entire section head number string
>>      (e.g., 1.10) to have RTL direction, however, each individual number
>>      string inside (say, 1 or 10) should be written LTR.  How can this be
>>      achieved?
>>
>>      The six TeX files (with corresponding PDF outputs) are attached.
>>
>>      BTW this is using ConTeXt ver: 2016.04.01 13:01 MKIV beta fmt:
>>      2016.4.7 int: english/english, running LuaTeX, Version beta-0.90.0
>>      (TeX Live 2016) on Mac OS X.
>>
>>      Thanks a lot,
>>      —MHB
>>
>>
>>
>>
>> --
>>
>> -----------------------------------------------------------------
>>                                            Hans Hagen | PRAGMA ADE
>>                Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
>>        tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
>> -----------------------------------------------------------------
>>
>>
>> ___________________________________________________________________________________
>> If your question is of interest to others as well, please add an entry to the Wiki!
>>
>> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
>> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
>> archive  : http://foundry.supelec.fr/projects/contextrev/
>> wiki     : http://contextgarden.net
>> ___________________________________________________________________________________
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context at ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


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