[NTG-context] Preventing double title pages for nested content

[Wolfgang Schuster]

> Am 21.05.2015 um 14:33 schrieb Kate F <kate at elide.org>:
> 
> On 21 May 2015 at 09:06, Wolfgang Schuster <schuster.wolfgang at gmail.com <mailto:schuster.wolfgang at gmail.com>> wrote:
>> 
>>> Am 21.05.2015 um 00:36 schrieb Kate F <kate at elide.org>:
>>> 
>>> Hi,
>>> 
>>> There's been a misunderstanding here.
>>> 
>>> You're showing a structure which is a two-deep hierarchy (Libraries
>>> containing Manpages). That's not what the structure in my example is,
>>> and you're showing something which I think is different to what I'm
>>> asking for. (Or I just can't see how to apply the technique you're
>>> illustrating)
>> 
>> You have to add just another level to my example, nothing more.
>> 
>>> The structure for my example is Volumes which contain either Libraries
>>> *or* Manpages, and a Library contains Manpages. I'll draw out the tree
>>> from my example again:
>>> (this is the same as in my first email for this thread, but I'm
>>> repeating it here for clarity)
>>> 
>>> \starttext
>>>   \placecontent[list={Volume,Library,Manpage}]
>>> 
>>>   \startVolume[title=Section 1: Programs]
>>>       \dorecurse{3}{\startManpage[title=progxyz(1)] \input lorem \stopManpage}
>>>   \stopVolume
>>> 
>>>   \startVolume[title=Section 2: Syscalls]
>>>       \dorecurse{3}{\startManpage[title=syscallxyz(1)] \input lorem
>>> \stopManpage}
>>>   \stopVolume
>>> 
>>>   \startVolume[title=Section 3: Libraries]
>>>       \startLibrary[title=libjpeg]
>>>           \dorecurse{3}{\startManpage[title=jpegapi_a(3)] \input
>>> lorem \stopManpage}
>>>       \stopLibrary
>>>       \startLibrary[title=libpng]
>>>           \dorecurse{3}{\startManpage[title=pngapi_a(3)] \input
>>> lorem \stopManpage}
>>>       \stopLibrary
>>>       \startLibrary[title=libbmp]
>>>           \dorecurse{3}{\startManpage[title=bmpapi_a(3)] \input
>>> lorem \stopManpage}
>>>       \stopLibrary
>>>   \stopVolume
>>> 
>>>   \startVolume[title=Section 4: Drivers]
>>>       \dorecurse{3}{\startManpage[title=drvxyz(1)] \input lorem \stopManpage}
>>>   \stopVolume
>>> 
>>>   \startVolume[title=Section 7mk: Makefiles]
>>>       \dorecurse{3}{\startManpage[title=xyz.mk(1)] \input lorem \stopManpage}
>>>   \stopVolume
>>> \stoptext
>>> 
>>> Please look at Volume 3; you can see it contains some Libraries
>>> (libjpeg, libpng, libbmp). The other Volumes do not contain Libraries;
>>> they just contain Manpages directly. So the ToC is:
>>> 
>>> Volume 1: "Programs"       <-- I want a title page for this
>>>   ... manpages for (1)
>>> Volume 2: "Syscalls"       <-- I want a title page for this
>>>   ... manpages for (2)
>>> Volume 3: "Libraries"   <-- no title page for this!! Because this
>>> Volume contains Libraries
>>>   Library "libjpeg"       <-- I want a title page for this
>>>       ... manpages for (3) libjpeg
>>>   Library "libpng"       <-- I want a title page for this
>>>       ... manpages for (3) libpng
>>>  Library "libbmp"       <-- I want a title page for this
>>>       ... manpages for (3) libbmp
>>> Volume 4: "Drivers"       <-- I want a title page for this
>>>   ... manpages for (4)
>>> Volume 7: "Makefiles"       <-- I want a title page for this
>>>   ... manpages for (7)
>>> 
>>> As I said in my original email, this grouping into libraries only
>>> applies to Volume 3.
>>> 
>>> The effect I'm trying to achieve is to have a single title page before
>>> each set of manpages. So I want a title page for "Programs",
>>> "Syscalls", "libjpeg", "libpng", "libbmp", "Drivers", and "Makefiles".
>>> But I do not want a title page for Volume 3 itself, "Libraries"
>>> because that would be immediately followed by the title page for
>>> libjpeg, and my aim is to avoid having two consecutive title pages. I
>>> have indicated these with arrows above.
>>> 
>>> I hope that's clear. Sorry for repeating myself…
>> 
>> 
>> Sorry for resending nearly the same example for another time but it still does what you asked for.
>> 
> 
> But it doesn't...
> 
> You have a page for Volume 3 (which is made blank due to your
> \ifnum\structurelistsize=0):

You’re wrong, the test for \structurelistsize has nothing to do with the empty page.

>>> Volume 3: "Libraries"   <-- no title page for this!!
> 
> Instead, I'm trying to find how to not have this produce a page (or
> some other way to achieve the same effect).
> 
> And you have no title pages for these:
> 
>>> Volume contains Libraries
>>>   Library "libjpeg"       <-- I want a title page for this
>>>       ... manpages for (3) libjpeg
>>>   Library "libpng"       <-- I want a title page for this
>>>       ... manpages for (3) libpng
>>>  Library "libbmp"       <-- I want a title page for this

These weren’t needed for the example and I have no idea what kind of title page
you want for your Volumes and Libraries.

Wolfgang
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