I have resolved the issue in a practical, but unsatisfactory, manner.
I have resorted to creating an interlude, a new heading derived from
title, setting it for left pages with no displayed head:
\definehead[ChapterEpigraph][title]
\setuphead [ChapterEpigraph][
page={yes,left},
insidesection=\vfill,
aftersection={\vfill\vfill},
header=empty,
placehead=no,
]
Thus, \startChapterEpigraph can safely be placed before each
\startchapter (and between the last \stopchapter of a part and the start
of the next part) when that last chapter ends on a recto). This clears
the chapter marking in the headings of the new verso. When there is an
epigraph to set, it is placed in the ChapterEpigraph section.
This is unsatisfactory because it implements an inaccurate semantic
model of the document – the epigraphs belong to the following chapter,
not the numberless, nameless interlude.
And there is almost certainly a bug lurking here. I had considered
adding the marking of the next chapter to the interlude to better tie
the interlude to the place it belongs. When I made ChapterEpigraph
derivative of chapter:
\definehead[ChapterEpigraph][chapter]
\setuphead [ChapterEpigraph][
page={yes,left},
insidesection=\vfill,
aftersection={\vfill\vfill},
header=yes,
number=no,
placehead=no,
]
and provided a marking:
\startChapterEpigraph[marking={Same as next chapter marking}]
The resulting page displayed the marking of the previous chapter, not
the marking provided. This appears to be the same behavior as in the
example below in my first note, although I can provide another working
example using this apparatus if anyone wants it.
Can we please have a \setuphead or \setupheads option to clear markings
at the end of the level, and not simply override them when the next
equivalent level starts? (Although perhaps, based on the observed issue
described just above, there is some other logic at work here.)
--
Rik
On 2017-10-15 23:54, Rik Kabel wrote:
As a followup to my query on suppressing header marking, I have
prepared an example which clearly shows odd, if not buggy behavior.
The book places chapter openings on recto pages which follow a verso
that may have an epigraph. When there is no epigraph, the blank verso
is properly unmarked by a header, but when there is an epigraph, the
header from the previous chapter appears on the page. How can I
eliminate this orphan header?
\setuppagenumbering [alternative=doublesided,location=]
\setupheadertexts [][{\it\getmarking[section]}]
[{\it\getmarking[chapter]}][]
\starttexdefinition unexpanded startSectionEpigraph
\dostartbuffer [SectionEpigraph]
[startSectionEpigraph][stopSectionEpigraph]
\stoptexdefinition
\setuphead [chapter][
beforesection=\setups{chapter:epigraph}]
\startsetups chapter:epigraph
\page[yes,left]% same result with yes,header,footer,left
\doifelsebuffer{SectionEpigraph}
{\getbuffer[SectionEpigraph]
\resetbuffer[SectionEpigraph]}
{\donothing}
\page[yes,header,footer,right]
\stopsetups
\starttext
\completecontent
\startfrontmatter
\startchapter[title=Preface]
\startparagraph
\input ward
\stopparagraph
\stopchapter
\stopfrontmatter
\startbodymatter
\startchapter[title=Chapter First]
\startparagraph
\input ward
\stopparagraph
\stopchapter
\startSectionEpigraph
Why does this page have the heading
from the previous chapter?
\stopSectionEpigraph
\startchapter[title=Chapter Second]
\startparagraph
\input ward
\stopparagraph
\stopchapter
\startSectionEpigraph
Look up!
\stopSectionEpigraph
\startchapter[title=Chapter Third]
\startparagraph
\input ward
\stopparagraph
\stopchapter
\startchapter[title=Chapter Final]
\startparagraph
\input ward
\stopparagraph
\stopchapter
\stopbodymatter
\stoptext
--
Rik
___
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://context.aanhet.net
archive :
