diff options
Diffstat (limited to 'tex/context/base/page-ins.mkiv')
| -rw-r--r-- | tex/context/base/page-ins.mkiv | 197 |
1 files changed, 57 insertions, 140 deletions
diff --git a/tex/context/base/page-ins.mkiv b/tex/context/base/page-ins.mkiv index a63de0b26..793e28d4c 100644 --- a/tex/context/base/page-ins.mkiv +++ b/tex/context/base/page-ins.mkiv @@ -13,164 +13,81 @@ \writestatus{loading}{ConTeXt Core Macros / Insertions} -%D Insertions are special data collections that are associated to \TEX's internal -%D page builder. When multiple footnote classes were introduced, I decided to -%D isolate some of the functionality in a module. - -\registerctxluafile{page-ins}{1.001} +%D Insertions are special data collections that are associated +%D to \TEX's internal page builder. When multiple footnote +%D classes were introduced, I decided to isolate some of the +%D functionality in a module. \unprotect -%D Because we need to deal with inserts at the \LUA\ end as well, -%D we provide a proper installer. - -% Not yet used as we need to adapt some code to this. - -\installcorenamespace{insertion} -\installcorenamespace{insertionnumber} +\newtoks\@@insertionlist -\installcommandhandler \??insertion {insertion} \??insertion +\def\processinsertions{\the\@@insertionlist} -\setupinsertion - [%c!n=\plusone, - %c!distance=\zeropoint, - %c!maxheight=\maxdimen, - %c!factor=\plusthousand, - \c!location=\v!page] +\let\doprocessinsert\gobbleoneargument -\newcount\currentinsertionnumber % This is a count and not a macro ! - -\newtoks\t_page_inserts_list +\def\installinsertion#1% + {\ifdefined#1\else + \let#1\relax + \fi + \ifx#1\relax % permits \csname...\endcsname + \newinsert#1% + \count#1\plusthousand + \skip #1\zeropoint + \dimen#1\maxdimen + \appendtoks\doprocessinsert#1\to\@@insertionlist + \fi} -\let\doprocessinsert\relax +\def\synchronizeinsertions + {\def\doprocessinsert##1{\ifvoid##1\else\insert##1{\unvbox##1}\fi}% + \processinsertions} -%D Maybe some day we will move settings here. +%D For instance, when we postpone footnotes, we need to save +%D some data related to the inserts. The next methods are +%D far from ideal, but better than nothing. We save and +%D restore box content and associated data independently. +%D The box content is only restores when non||void. -\unexpanded\def\setcurrentinsertion#1% - {\edef\currentinsertion{#1}% - \currentinsertionnumber\csname\??insertionnumber\currentinsertion\endcsname} +\def\backupinsertion#1% + {\csname\string#1\endcsname} -\def\namedinsertionnumber#1{\csname\??insertionnumber#1\endcsname} +\def\installbackupinsertion#1% + {\expandafter\newinsert\csname\string#1\endcsname + \count\backupinsertion#1\zerocount + \skip \backupinsertion#1\zeropoint + \dimen\backupinsertion#1\maxdimen} -\unexpanded\def\page_inserts_synchronize_registers - {\currentinsertionnumber\csname\??insertionnumber\currentinsertion\endcsname} +\def\saveinsertionbox#1% + {\ifdim\ht#1>\zeropoint % hm, actually unknown + \global\setbox\backupinsertion#1\box#1% + \else + \global\setbox\backupinsertion#1\emptybox + \fi} -% for practical reasone we still set these elsewhere but that might chaneg in the future -% -% \global\count\currentinsertionnumber\numexpr\insertionparameter\c!factor/\insertionparameter\c!n\relax -% \global\skip \currentinsertionnumber\insertionparameter\c!distance \relax -% \global\dimen\currentinsertionnumber\insertionparameter\c!maxheight\relax} +\def\restoreinsertionbox#1% + {\ifvoid\backupinsertion#1\else % if void, we keep the content + \global\setbox#1\box\backupinsertion#1% + \fi} -\appendtoks - \page_inserts_synchronize_registers -\to \everysetupinsertion +\def\eraseinsertionbackup#1% + {\global\setbox\backupinsertion#1\emptybox} -\unexpanded\def\page_inserts_process#1% beware, this addapts currentinsertion ! - {\edef\currentinsertion{#1}% - \currentinsertionnumber\csname\??insertionnumber\currentinsertion\endcsname - \doprocessinsert\currentinsertionnumber} % old method +\def\saveinsertiondata#1% + {\global\skip \backupinsertion#1\skip #1% + \global\count\backupinsertion#1\count#1% + \global\dimen\backupinsertion#1\dimen#1} -\unexpanded\def\processinsertions - {\the\t_page_inserts_list} +\def\restoreinsertiondata#1% + {\global\skip #1\skip \backupinsertion#1% + \global\count#1\count\backupinsertion#1% + \global\dimen#1\dimen\backupinsertion#1} -\unexpanded\def\synchronizeinsertions - {\let\doprocessinsert\page_inserts_synchronize - \processinsertions} +%D Auxiliary macros: -\unexpanded\def\page_inserts_synchronize#1% yes or no +\def\addinsertionheight#1\to#2% {\ifvoid#1\else - \insert#1{\unvbox#1}% - \fi} - -\unexpanded\def\doifinsertionelse#1% - {\ifcsname\??insertionnumber#1\endcsname - \expandafter\firstoftwoarguments - \else - \expandafter\secondoftwoarguments + \advance#2 1\skip#1\relax + \advance#2 \ht #1\relax \fi} -% \unexpanded\def\startinsertion[#1]% -% {\insert\csname\??insertionnumber#1\endcsname\bgroup} -% -% \unexpanded\def\stopinsertion -% {\egroup} - -% For the moment we use the regular insertion allocator so that users can -% still define their own insertions (not that they will play nicely with -% all context mechanisms then). We can use the dimensions at the \LUA\ end -% so we don't need to pass pass them explicitly. Actually, when we see an -% insertion node at that end, we already know the number. - -\appendtoks - \ifx\currentinsertionparent\empty - \ifcsname\??insertionnumber\currentinsertion\endcsname - % bad news - \else - \expandafter\newinsert\csname\??insertionnumber\currentinsertion\endcsname - \page_inserts_synchronize_registers - \ctxcommand{defineinsertion("\currentinsertion",{ number = \number\currentinsertionnumber })}% - \t_page_inserts_list\expandafter\expandafter\expandafter - {\expandafter\the\expandafter\t_page_inserts_list - \expandafter\page_inserts_process\csname\??insertionnumber\currentinsertion\endcsname}% - \count\currentinsertionnumber\plusthousand - \skip \currentinsertionnumber\zeropoint - \dimen\currentinsertionnumber\maxdimen - \fi - \else - \expandafter\let\csname\??insertionnumber\currentinsertion\expandafter\endcsname - \csname\??insertionnumber\currentinsertionparent\endcsname - \fi -\to \everydefineinsertion - -\appendtoks - \ctxcommand{setupinsertion("\currentinsertion",{ - location = "\insertionparameter\c!location", - })}% -\to \everysetupinsertion - -\unexpanded\def\page_inserts_set_location#1#2% fast one - {\ctxcommand{setinsertionlocation("#1","#2")}} - -%D Auxiliary macros: - -\def\page_insert_insertion_height#1% - {\dimexpr\expandafter\page_insert_insertion_height_indeed\csname\??insertionnumber#1\endcsname\relax} - -\def\page_insert_insertion_height_indeed#1% - {\ifvoid#1\zeropoint\else1\skip#1+\ht#1\fi} - -%D Obsolete: - -% \installcorenamespace{insertionbackup} -% -% \unexpanded\def\installbackupinsertion#1% -% {\ifcsname\??insertionbackup\string#1\endcsname \else -% \expandafter\newinsert\csname\??insertionbackup\string#1\endcsname -% \count\csname\??insertionbackup\string#1\endcsname\zerocount -% \skip \csname\??insertionbackup\string#1\endcsname\zeropoint -% \dimen\csname\??insertionbackup\string#1\endcsname\maxdimen -% \fi} -% -% \unexpanded\def\saveinsertionbox#1% hm, actually unknown -% {\global\setbox\csname\??insertionbackup\string#1\endcsname -% \ifdim\ht#1>\zeropoint\box#1\else\emptybox\fi} -% -% \unexpanded\def\restoreinsertionbox#1% -% {\ifvoid\backupinsertion#1\else % if void, we keep the content -% \global\setbox#1\box\csname\??insertionbackup\string#1\endcsname -% \fi} -% -% \unexpanded\def\eraseinsertionbackup#1% -% {\global\setbox\csname\??insertionbackup\string#1\endcsname\emptybox} -% -% \unexpanded\def\saveinsertiondata#1% -% {\global\skip \csname\??insertionbackup\string#1\endcsname\skip #1% -% \global\count\csname\??insertionbackup\string#1\endcsname\count#1% -% \global\dimen\csname\??insertionbackup\string#1\endcsname\dimen#1} -% -% \unexpanded\def\restoreinsertiondata#1% -% {\global\skip #1\skip \csname\??insertionbackup\string#1\endcsname -% \global\count#1\count\csname\??insertionbackup\string#1\endcsname -% \global\dimen#1\dimen\csname\??insertionbackup\string#1\endcsname} - \protect \endinput |