Re: Preventing double title pages for nested content

[Wolfgang Schuster <schuster.wolfgang@gmail.com>]

> Am 21.05.2015 um 23:44 schrieb Kate F <kate@elide.org>:
> 
> On 21 May 2015 at 22:09, Wolfgang Schuster <schuster.wolfgang@gmail.com> wrote:
>> 
>> Am 21.05.2015 um 14:33 schrieb Kate F <kate@elide.org>:
>> 
>> On 21 May 2015 at 09:06, Wolfgang Schuster <schuster.wolfgang@gmail.com>
>> wrote:
>> 
>> 
>> Am 21.05.2015 um 00:36 schrieb Kate F <kate@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
> 
> They were the whole point of what I was asking for help with.


\definehead [Volume]  [part]
\definehead [Library] [chapter]
\definehead [Manpage] [section]

\setuphead
  [Volume]
  [placehead=empty,
       after=\directsetup{libraryentries}]

\setuphead
  [Library]
  [  page=,
  placehead=empty,
   before=\directsetup{Library:before},
    after=\directsetup{Library:after}]

\startsetups[Library:before]
	\ifconditional\libraryentries
		\page
	\else
		\settrue\libraryentries
	\fi
\stopsetups

\startsetups[Library:after]
	\startframed[frame=off,width=\textwidth,height=\dimexpr\textheight-\strutdp\relax,align={middle,lohi}]
		\placeheadtext[Library]
	\stopframed
	\page
\stopsetups

\newconditional\libraryentries \settrue\libraryentries

\startsetups[libraryentries]
	\determinelistcharacteristics[Library]
	\ifnum\structurelistsize=0
		\startframed[frame=off,width=\textwidth,height=\dimexpr\textheight-\strutdp\relax,align={middle,lohi}]
			\placeheadtext[Volume]
		\stopframed
	\else
		\setfalse\libraryentries
	\fi	
\stopsetups

%\showframe[text][text]

\starttext

\placelist[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

Wolfgang
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