context import for TL13, from www.pragma-ade.com/context/beta/cont-tmf.zip

git-svn-id: svn://tug.org/texlive/trunk@29731 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 102 insertions, 0 deletions

diff --git a/Master/texmf-dist/tex/context/base/page-pst.mkiv b/Master/texmf-dist/tex/context/base/page-pst.mkiv
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+%D \module
+%D   [       file=page-mis,
+%D        version=2008.11.17, % was part of page-flt.tex / 2000.10.20
+%D          title=\CONTEXT\ Page Macros,
+%D       subtitle=Postponing,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
+%C details.
+
+\writestatus{loading}{ConTeXt Page Macros / Postponing}
+
+\registerctxluafile{page-pst}{1.001}
+
+\unprotect
+
+% postponing
+
+\newevery\everytopofpage\relax
+
+\appendtoks
+    \the\everytopofpage
+\to \everystarttext
+
+\appendtoks
+    \global\everytopofpage\emptytoks
+\to \everystoptext
+
+% \startpostponing [pagenumber] [+pageoffset]
+%
+% \startpostponing[2]
+%   PAGE 2 \blank
+% \stoppostponing
+%
+% \startpostponing[+1]
+%   PAGE +1 \blank
+% \stoppostponing
+%
+% \startpostponing[+2]
+%   PAGE +2 \blank
+% \stoppostponing
+%
+% \starttext \dorecurse{4}{\input tufte \page} \stoptext
+
+%D There is no real need to use \LUA\ here but the bookkeeping
+%D is somewhat easier and we also can erase buffers easier when
+%D we keep a local cache, especially as we can flush per page.
+
+%newif      \ifinpostponing                    % prevents nesting
+
+\newcount      \c_page_postponed_blocks_next_page % set at the lua end
+\newconditional\c_page_postponed_busy
+
+\unexpanded\setvalue{\e!start\v!postponing}%
+  {\bgroup
+   \obeylines
+   \doifnextoptionalelse{\egroup\page_postponed_blocks_start}{\egroup\page_postponed_blocks_start[0]}}
+
+\unexpanded\setvalue{\e!stop\v!postponing}%
+  {\ctxcommand{registerpostponedblock("\currentpostponedpage")}\relax}
+
+\def\page_postponed_blocks_start[#1]%
+  {\edef\currentpostponedpage{#1}%
+   \grabbufferdatadirect{postponedblock}{\e!start\v!postponing}{\e!stop\v!postponing}}
+
+% officially we should flush again after a flush as there can be new future pages
+% but that will be looked into when we run into it
+
+\unexpanded\def\page_postponed_blocks_flush_indeed
+  {\begingroup
+   \setsystemmode\v!postponing
+   \settrue\c_page_postponed_busy
+   \pagetotal\zeropoint        % here? still needed? (was after flush pagefloats)
+   \the\everytopofpage\relax
+  %\flushrestfloats
+   \page_floats_flush_page_floats
+   \setnormalcatcodes                 % postponing in verbatim
+   \restoreglobalbodyfont             % otherwise problems inside split verbatim
+   \ctxcommand{flushpostponedblocks()}%
+   \relax
+   \page_otr_command_flush_floats     % new but potential dangerous, maybe we need a classification
+   \endgroup}                         % of blocks: with and without flush
+
+\unexpanded\def\page_postponed_blocks_flush
+  {\ifconditional\c_page_postponed_busy
+     % probably a nested flush
+   \else\ifnum\c_page_postponed_blocks_next_page=\zerocount
+     % nothing in cache
+   \else\ifnum\c_page_postponed_blocks_next_page<\zerocount
+     % generic cache
+     \page_postponed_blocks_flush_indeed
+   \else\ifnum\c_page_postponed_blocks_next_page>\realpageno
+     % future content
+   \else
+     % pending content
+     \page_postponed_blocks_flush_indeed
+   \fi\fi\fi\fi}
+
+\protect \endinput