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

There is NO warranty. Redistribution of this software is covered by
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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






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-- 
Best regards,
ℤhichu ℂhen

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