Hello,

I need to format my chapters in the following way:

   - The chapters are centered (midaligned).

   - Some chapters are long, so they have to be multilined.

   - The chapter title should be in capital letters, but in the header should 
it be without capitalisation.

   - When the chapter title is multilined, only the first line should appear in 
the header, followed by "...",
     the same in TOC

   - When the chapter title is multilined, I want to choose the point of line 
break with "\\"
   

So something like this:

  \chapter{FIRST CHAPTER TITLE}  (in the header and TOC will be "First chapter 
title")

  \chapter{SECOND CHAPTER TITLE \\ WHICH IS VERY VERY VERY LONG} (in the header 
and TOC will be "Second chapter title...")


I tried the following setup for the chapter:  

\setuphead
  [chapter]
  [after={\blank[2*line,fixed]},
   header=empty,
   textcommand=\midaligned,
   style={\chapterfont\WORD},
   sectionset=none,
   indentnext=no
  ]


But when I try to process the file, I will get the following error:

    structure       > sectioning > chapter @ level 2 : 0.1 -> Second chapter 
title \\ which is very very very looong
    ! Missing } inserted.
     
    system          > tex > error on line 1 in file test.tex: Missing  ...
     
     1 >>  \environment test_environment
     2     
     3     \startcomponent test19
     4     
     5     \product test
     6     
     7     
     8     \chapter{Second chapter title \\ which is very very very looong}
     9
     
    <inserted text> 
                    }
    <to be read again> 
                       \endgroup 
    \\->\endgroup 
                  \par \doalignline {\hss }{\hss }\begingroup 
    l.1 Second chapter title \\
                                which is very very very looong
    \ctxcommand ...\directlua \zerocount {commands.#1}
                                                      
    \getheadtitle ...lecommand \relax \structuretitle 
                                                      \else \normalexpanded 
{\no...
    ...
    l.10 ...r title \\ which is very very very looong}


If I don't try to enforce line break in the title with "\\", the file is 
processed without problem,
but also without making anyline break at all -- the whole long chapter title is 
one very long line.

If I don't use "textcommand=\midaligned", I am able to make multiline chapter 
with my own line break,
but the title is left-aligned...

Could anybody tell me, how to make properly the chapter setup according to 
above described rules?

Thank you in advance.

Pavel
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