unwanted head behavior

unwanted head behavior

[Zhichu Chen]

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Dear Hans and Wolfgang,

The following code generates a pdf that I cannot understand.

1. Although "placehead" is set to "no," the \part macro still makes an empty line.
2. The first \chapter does not open a new page, but if we switch the first \title
     and the first \chapter, the result seems to be all right.

Is there a simple fix?

Thanks in advance.

==================================
\setuphead
   [part,chapter,title,section]
   [continue=yes,page=yes,number=no]

\setuphead[part][placehead=no]


\showframe

\starttext

\input ward\page

\part{TITLE}\input ward\par
\title{Title}
\chapter{Title}
\chapter{Title}
\title{Title}
\chapter{Title}

\stoptext
==================================

ConTeXt minimal information:

zhichu  ~  context -version

mtx-context     | ConTeXt Process Management 0.63
mtx-context     |
mtx-context     | main context file:
/opt/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
mtx-context     | current version: 2016.03.26 13:51
  zhichu  ~  luatex -version
This is LuaTeX, Version beta-0.90.0 (TeX Live 2016)

Execute  'luatex --credits'  for credits and version details.

There is NO warranty. Redistribution of this software is covered by
the terms of the GNU General Public License, version 2 or (at your option)
any later version. For more information about these matters, see the file
named COPYING and the LuaTeX source.

LuaTeX is Copyright 2016 Taco Hoekwater and the LuaTeX Team.

  zhichu  ~ 

-- 
Best regards,
ℤhichu ℂhen

Shanghai Institute of Applied Physics
No. 2019, Jialuo Road
Jiading, Shanghai, P.R.China
Tel: +86-21-39194888




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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@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
___________________________________________________________________________________

Re: unwanted head behavior

[Zhichu Chen]

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Hi,

I found the empty line is due to the definition of 
\strc_rendering_place_head_empty in strc-ren.mkiv:
====================
\unexpanded\def\strc_rendering_place_head_empty
   {\hbox \headreferenceattributes {\getheadsyncs}}
====================

The definition in strc-sec.mkiv works fine (put the following lines just 
before \starttext)
====================
\unexpanded\def\strc_rendering_place_head_empty
   {\setheadmarking
    \getheadsyncs}
====================

Isn't that a bug?


On 04/05/2016 01:19 PM, Zhichu Chen wrote:
>
> 	
>
> 	
>
> 	
>
> 	
>
>
>
> Dear Hans and Wolfgang,
>
> The following code generates a pdf that I cannot understand.
>
> 1. Although "placehead" is set to "no," the \part macro still makes an empty line.
> 2. The first \chapter does not open a new page, but if we switch the first \title
>      and the first \chapter, the result seems to be all right.
>
> Is there a simple fix?
>
> Thanks in advance.
>
> ==================================
> \setuphead
>    [part,chapter,title,section]
>    [continue=yes,page=yes,number=no]
>
> \setuphead[part][placehead=no]
>
>
> \showframe
>
> \starttext
>
> \input ward\page
>
> \part{TITLE}\input ward\par
> \title{Title}
> \chapter{Title}
> \chapter{Title}
> \title{Title}
> \chapter{Title}
>
> \stoptext
> ==================================
>
> ConTeXt minimal information:
>
> zhichu  ~  context -version
>
> mtx-context     | ConTeXt Process Management 0.63
> mtx-context     |
> mtx-context     | main context file:
> /opt/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
> mtx-context     | current version: 2016.03.26 13:51
>   zhichu  ~  luatex -version
> This is LuaTeX, Version beta-0.90.0 (TeX Live 2016)
>
> Execute  'luatex --credits'  for credits and version details.
>
> There is NO warranty. Redistribution of this software is covered by
> the terms of the GNU General Public License, version 2 or (at your option)
> any later version. For more information about these matters, see the file
> named COPYING and the LuaTeX source.
>
> LuaTeX is Copyright 2016 Taco Hoekwater and the LuaTeX Team.
>
>   zhichu  ~ 
>
> -- 
> Best regards,
> ℤhichu ℂhen
>
> Shanghai Institute of Applied Physics
> No. 2019, Jialuo Road
> Jiading, Shanghai, P.R.China
> Tel: +86-21-39194888
>
>
>
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@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
> ___________________________________________________________________________________


-- 
Best regards,
ℤhichu ℂhen

Shanghai Institute of Applied Physics
No. 2019, Jialuo Road
Jiading, Shanghai, P.R.China
Tel: +86-21-39194888


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@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
___________________________________________________________________________________

Re: unwanted head behavior

[Hans Hagen]

On 4/7/2016 5:42 AM, Zhichu Chen wrote:
> Hi,
>
> I found the empty line is due to the definition of
> \strc_rendering_place_head_empty in strc-ren.mkiv:
> ====================
> \unexpanded\def\strc_rendering_place_head_empty
>    {\hbox \headreferenceattributes {\getheadsyncs}}
> ====================
>
> The definition in strc-sec.mkiv works fine (put the following lines just
> before \starttext)
> ====================
> \unexpanded\def\strc_rendering_place_head_empty
>    {\setheadmarking
>     \getheadsyncs}
> ====================
>
> Isn't that a bug?

no, (one can argue that it should be exactly one line heigh but that 
would break existing code)

this trickery is to make sure that hyperlink and list entries still work ok

Hans


-----------------------------------------------------------------
                                           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@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
___________________________________________________________________________________

Re: unwanted head behavior

[Zhichu Chen]

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If I understand correctly, the "continue=yes" key prevents a new page 
generated by a lower-level structure, e.g., section, following a 
higher-level structure, e.g., chapter.

Then why the checking is so complex in strc-sec.mkiv:
==================================
\def\strc_sectioning_handle_page_nop
   {\edef\p_continue{\headparameter\c!continue}%
    \ifx\p_continue\v!yes
      \ifnum\previoussectioncountervalue=\zerocount
        \strc_sectioning_check_layout
      \else\ifnum\currentsectioncountervalue>\zerocount
        \strc_sectioning_check_layout
      \fi\fi
    \else
      \strc_sectioning_check_layout
    \fi}
==================================

I temporarily changed the definition to:
==================================
\newcount\previousheadlevel
\previousheadlevel\plusone
\def\strc_sectioning_handle_page_nop
   {\edef\p_continue{\headparameter\c!continue}%
    \ifx\p_continue\v!yes
      \ifnum\currentheadlevel>\previousheadlevel\else
        \strc_sectioning_check_layout
      \fi
    \else
      \strc_sectioning_check_layout
    \fi
    \previousheadlevel\currentheadlevel}
==================================

Seems fine.



PS: irrelevant to my problem, but I just wish ConTeXt to be perfect. So:
1, line 1060, file strc-sec.mkiv:
\global\setfalse\c_strc_rendering_continue
shouldn't this line be "\global\setfalse\c_strc_rendering_continuous"?
2, a lot of \.._strc_sectioniong_... macros in strc-sec.mkiv. I think 
changing the "sectioniong" to "sectioning" may prevent potential typos.



On 04/05/2016 01:19 PM, Zhichu Chen wrote:
>
> Dear Hans and Wolfgang,
>
> The following code generates a pdf that I cannot understand.
>
> 1. Although "placehead" is set to "no," the \part macro still makes an empty line.
> 2. The first \chapter does not open a new page, but if we switch the first \title
>      and the first \chapter, the result seems to be all right.
>
> Is there a simple fix?
>
> Thanks in advance.
>
> ==================================
> \setuphead
>    [part,chapter,title,section]
>    [continue=yes,page=yes,number=no]
>
> \setuphead[part][placehead=no]
>
>
> \showframe
>
> \starttext
>
> \input ward\page
>
> \part{TITLE}\input ward\par
> \title{Title}
> \chapter{Title}
> \chapter{Title}
> \title{Title}
> \chapter{Title}
>
> \stoptext
> ==================================
>
> ConTeXt minimal information:
>
>
> context -version
>
> mtx-context     | ConTeXt Process Management 0.63
> mtx-context     |
> mtx-context     | main context file:
> /opt/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
> mtx-context     | current version: 2016.03.26 13:51
>
>
> luatex -version
> This is LuaTeX, Version beta-0.90.0 (TeX Live 2016)
>
> Execute  'luatex --credits'  for credits and version details.
>
> There is NO warranty. Redistribution of this software is covered by
> the terms of the GNU General Public License, version 2 or (at your option)
> any later version. For more information about these matters, see the file
> named COPYING and the LuaTeX source.
>
> LuaTeX is Copyright 2016 Taco Hoekwater and the LuaTeX Team.
> -- 
> Best regards,
> ℤhichu ℂhen
>
> Shanghai Institute of Applied Physics
> No. 2019, Jialuo Road
> Jiading, Shanghai, P.R.China
> Tel: +86-21-39194888
>
>
>
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@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
> ___________________________________________________________________________________


-- 
Best regards,
ℤhichu ℂhen

Shanghai Institute of Applied Physics
No. 2019, Jialuo Road
Jiading, Shanghai, P.R.China
Tel: +86-21-39194888


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___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@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
___________________________________________________________________________________

Re: unwanted head behavior

[Hans Hagen]

On 4/7/2016 8:28 AM, Zhichu Chen wrote:

> PS: irrelevant to my problem, but I just wish ConTeXt to be perfect. So:
> 1, line 1060, file strc-sec.mkiv:
> \global\setfalse\c_strc_rendering_continue
> shouldn't this line be "\global\setfalse\c_strc_rendering_continuous"?

yes (but it's not used anywhere)

> 2, a lot of \.._strc_sectioniong_... macros in strc-sec.mkiv. I think
> changing the "sectioniong" to "sectioning" may prevent potential typos.

indeed, i'll fix it

>
> On 04/05/2016 01:19 PM, Zhichu Chen wrote:
>>
>> Dear Hans and Wolfgang,
>>
>> The following code generates a pdf that I cannot understand.
>>
>> 1. Although "placehead" is set to "no," the \part macro still makes an empty line.

try 'empty' instead of 'no'

(you can also use 'hidden' but then you need to flush the sync nodes 
yourself: \synchronizehead{part} ... something one does when the title 
is placed somewhere else that it gets triggered)


-----------------------------------------------------------------
                                           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@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
___________________________________________________________________________________

Re: unwanted head behavior

[Hans Hagen]

On 4/7/2016 8:28 AM, Zhichu Chen wrote:
> If I understand correctly, the "continue=yes" key prevents a new page
> generated by a lower-level structure, e.g., section, following a
> higher-level structure, e.g., chapter.
>
> Then why the checking is so complex in strc-sec.mkiv:
> ==================================
> \def\strc_sectioning_handle_page_nop
>    {\edef\p_continue{\headparameter\c!continue}%
>     \ifx\p_continue\v!yes
>       \ifnum\previoussectioncountervalue=\zerocount
>         \strc_sectioning_check_layout
>       \else\ifnum\currentsectioncountervalue>\zerocount
>         \strc_sectioning_check_layout
>       \fi\fi
>     \else
>       \strc_sectioning_check_layout
>     \fi}
> ==================================
>
> I temporarily changed the definition to:
> ==================================
> \newcount\previousheadlevel
> \previousheadlevel\plusone
> \def\strc_sectioning_handle_page_nop
>    {\edef\p_continue{\headparameter\c!continue}%
>     \ifx\p_continue\v!yes
>       \ifnum\currentheadlevel>\previousheadlevel\else
>         \strc_sectioning_check_layout
>       \fi
>     \else
>       \strc_sectioning_check_layout
>     \fi
>     \previousheadlevel\currentheadlevel}
> ==================================
>
> Seems fine.

\def\currentsectioncountervalue 
{\clf_depthnumber\numexpr\thenamedheadlevel\currenthead\relax}
%def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\currenthead+\minusone\relax}
\def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\previoushead\relax}

\let\previoushead\empty

\def\strc_sectioning_handle_page_nop
   {\edef\p_continue{\headparameter\c!continue}%
    \ifx\p_continue\v!yes
      \ifx\currenthead\previoushead % not really needed
         \strc_sectioning_check_layout
      \else\ifnum\previoussectioncountervalue=\zerocount
         \strc_sectioning_check_layout
      \else\ifnum\currentsectioncountervalue>\zerocount
         \strc_sectioning_check_layout
      \fi\fi\fi
    \else
      \strc_sectioning_check_layout
    \fi
    \globallet\previoushead\currenthead}

\def\strc_sectioning_handle_page_yes
   {\ifconditional\c_strc_sectioning_ignore_page
      \setfalse\c_strc_sectioning_ignore_page
    \else
      % beware, these numbers are not yet know here
      \strc_sectioning_handle_page_nop
      \edef\p_aligntitle{\headparameter\c!aligntitle}%
      \ifx\p_aligntitle\v!float
          \ifconditional\c_strc_sectioning_auto_break
            \vspacing[\v!samepage-\currentheadlevel]%
          \fi
          \headparameter\c!before\relax
          \indent
      \else
          \page_otr_command_flush_side_floats
          \ifconditional\c_strc_sectioning_auto_break
            \vspacing[\v!samepage-\currentheadlevel]%
          \fi
          \headparameter\c!before\relax
      \fi
      \global\c_strc_sectioning_preceding_level\currentheadlevel
    \fi
    \globallet\previoushead\currenthead}

but it really needs testing with other cases


-----------------------------------------------------------------
                                           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@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
___________________________________________________________________________________

Re: unwanted head behavior

[Zhichu Chen]

Dear Hans,


On 04/07/2016 06:31 PM, Hans Hagen wrote:
> \def\currentsectioncountervalue 
> {\clf_depthnumber\numexpr\thenamedheadlevel\currenthead\relax}
> %def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\currenthead+\minusone\relax} 
>
> \def\previoussectioncountervalue{\clf_depthnumber\numexpr\thenamedheadlevel\previoushead\relax} 
>
>
> \let\previoushead\empty
>
> \def\strc_sectioning_handle_page_nop
>   {\edef\p_continue{\headparameter\c!continue}%
>    \ifx\p_continue\v!yes
>      \ifx\currenthead\previoushead % not really needed
>         \strc_sectioning_check_layout
>      \else\ifnum\previoussectioncountervalue=\zerocount
>         \strc_sectioning_check_layout
>      \else\ifnum\currentsectioncountervalue>\zerocount
>         \strc_sectioning_check_layout
>      \fi\fi\fi
>    \else
>      \strc_sectioning_check_layout
>    \fi
>    \globallet\previoushead\currenthead}
>
> \def\strc_sectioning_handle_page_yes
>   {\ifconditional\c_strc_sectioning_ignore_page
>      \setfalse\c_strc_sectioning_ignore_page
>    \else
>      % beware, these numbers are not yet know here
>      \strc_sectioning_handle_page_nop
>      \edef\p_aligntitle{\headparameter\c!aligntitle}%
>      \ifx\p_aligntitle\v!float
>          \ifconditional\c_strc_sectioning_auto_break
>            \vspacing[\v!samepage-\currentheadlevel]%
>          \fi
>          \headparameter\c!before\relax
>          \indent
>      \else
>          \page_otr_command_flush_side_floats
>          \ifconditional\c_strc_sectioning_auto_break
>            \vspacing[\v!samepage-\currentheadlevel]%
>          \fi
>          \headparameter\c!before\relax
>      \fi
>      \global\c_strc_sectioning_preceding_level\currentheadlevel
>    \fi
>    \globallet\previoushead\currenthead}
>
> but it really needs testing with other cases
Tested and confirmed working in my project and this MWE. Thanks for the 
work.
>
>
>
> -----------------------------------------------------------------
>                                           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@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
> ___________________________________________________________________________________


-- 
Best regards,
ℤhichu ℂhen

Shanghai Institute of Applied Physics
No. 2019, Jialuo Road
Jiading, Shanghai, P.R.China
Tel: +86-21-39194888

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@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
___________________________________________________________________________________