%D \module %D [ file=core-var, %D version=1998.02.21, %D title=\CONTEXT\ Core Macros, %D subtitle=Variables, %D author=Hans Hagen, %D date=\currentdate, %D copyright={PRAGMA / Hans Hagen \& Ton Otten}] %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 Core Macros / Variables} \unprotect %D Modes: %D %D \starttyping %D \enablemode[screen,paper,bound] %D %D \doifmodeelse {paper} {this} {that} %D \doifmode {paper,screen} {this} %D \doifnotmode {paper,bound} {that} %D %D \startmode [list] %D \stopmode %D %D \startnotmode [list] %D \stopnotmode %D \stoptyping %D %D system modes have a * as prefix %D %D Sometimes, we want to prevent a mode for being set. Think %D of situations where a style enables a mode, but an outer %D level style does not want that. Preventing can be %D considered a permanent disabling on forehand. % \def\systemmodeprefix{*} % % \let\currentmode \empty % \let\preventedmodes\empty % % \def\preventmode[#1]% % {\expanded{\addtocommalist{#1}\noexpand\preventedmodes}} % % \def\enablemode[#1]% % {\expanded % {\doifnotinset{#1}{\preventedmodes} % {\noexpand\addtocommalist{#1}\noexpand\currentmode}}} % % \def\disablemode[#1]% % {\expanded{\removefromcommalist{#1}\noexpand\currentmode}} % % \def\doifmodeelse{\unprotect\dodoifmodeelse} % \def\doifmode {\unprotect\dodoifmode } % \def\doifnotmode {\unprotect\dodoifnotmode } % \def\startmode {\unprotect\dostartmode } % \def\startnotmode{\unprotect\dostartnotmode} % % \long\def\dodoifmodeelse#1% % {\protect\expanded{\doifcommonelse{#1}{\currentmode}}} % % \long\def\dodoifmode#1% % {\protect\expanded{\doifcommon {#1}{\currentmode}}} % % \long\def\dodoifnotmode#1% % {\protect\expanded{\doifnotcommon {#1}{\currentmode}}} % % \let\stopmode \relax % \let\stopnotmode\relax % % \long\def\dostartmode[#1]% % {\protect % \expanded{\doifnotcommon{#1}{\currentmode}}{\gobbleuntil\stopmode}} % % \long\def\dostartnotmode[#1]% % {\protect % \expanded{\doifcommon {#1}{\currentmode}}{\gobbleuntil\stopnotmode}} % % \def\doifallmodeselse{\unprotect\dodoifallmodeselse} % \def\doifallmodes {\unprotect\dodoifallmodes} % \def\doifnotallmodes {\unprotect\dodoifnotallmodes} % \def\startallmodes {\unprotect\dostartallmodes} % \def\startnotallmodes{\unprotect\dostartnotallmodes} % % \long\def\dodoifallmodeselse#1% % {\protect\expanded{\doifallcommonelse{#1}{\currentmode}}} % % \long\def\dodoifallmodes#1% % {\protect\expanded{\doifallcommon {#1}{\currentmode}}} % % \long\def\dodoifnotallmodes#1% % {\protect\expanded{\doifnotallcommon {#1}{\currentmode}}} % % \let\stopallmodes \relax % \let\stopnotallmodes\relax % % \long\def\dostartallmodes[#1]% % {\protect % \expanded{\doifnotallcommon{#1}{\currentmode}}{\gobbleuntil\stopallmodes}} % % \long\def\dostartnotallmodes[#1]% % {\protect % \expanded{\doifallcommon {#1}{\currentmode}}{\gobbleuntil\stopnotallmodes}} % faster \def\@mode@{@md@} \def\systemmodeprefix{*} \def\disabledmode {0} \def\enabledmode {1} \def\preventedmode {2} % fast internal ones \def\setmode #1{\@EA\let\csname\@mode@#1\endcsname\enabledmode } \def\resetmode#1{\@EA\let\csname\@mode@#1\endcsname\disabledmode} \def\setsystemmode #1{\@EA\let\csname\@mode@\systemmodeprefix#1\endcsname\enabledmode } \def\resetsystemmode#1{\@EA\let\csname\@mode@\systemmodeprefix#1\endcsname\disabledmode} % user ones \def\preventmode{\unprotect\dopreventmode} \def\enablemode {\unprotect\doenablemode } \def\disablemode{\unprotect\dodisablemode} % \def\dopreventmode[#1]{\protect\rawprocesscommalist[#1]\dodopreventmode} % \def\doenablemode [#1]{\protect\rawprocesscommalist[#1]\dodoenablemode } % \def\dodisablemode[#1]{\protect\rawprocesscommalist[#1]\dododisablemode} % % better: \def\dopreventmode[#1]{\protect\cleanuplabel{#1}\rawprocesscommalist[\cleanlabel]\dodopreventmode} \def\doenablemode [#1]{\protect\cleanuplabel{#1}\rawprocesscommalist[\cleanlabel]\dodoenablemode } \def\dodisablemode[#1]{\protect\cleanuplabel{#1}\rawprocesscommalist[\cleanlabel]\dododisablemode} \def\dodopreventmode#1% {\@EA\let\csname\@mode@#1\endcsname\preventedmode} \def\dodoenablemode#1% mode can be relax {\ifcase0\csname\@mode@#1\endcsname\relax \@EA\let\csname\@mode@#1\endcsname\enabledmode \fi} \def\dododisablemode#1% {\ifcase0\csname\@mode@#1\endcsname\or \@EA\let\csname\@mode@#1\endcsname\disabledmode \fi} % handy for mp \def\booleanmodevalue#1% can be \relax {\expandafter\ifx\csname\@mode@#1\endcsname\relax fals% \else\ifnum0\csname\@mode@#1\endcsname=0 fals% \else tru% \fi\fi e} % check macros \newif\ifcheckedmode \def\dodocheckformode#1% {\ifcase0\csname\@mode@#1\endcsname\or\checkedmodetrue\fi} \def\docheckformode#1#2#3% will be sped up with a quit {\cleanuplabel{#3}% \protect\checkedmodefalse\rawprocesscommacommand[\cleanlabel]\dodocheckformode \ifcheckedmode\@EA#1\else\@EA#2\fi} \def\dodocheckforallmodes#1% {\ifcase0\csname\@mode@#1\endcsname\relax\checkedmodefalse\or\or\checkedmodefalse\fi} \def\docheckforallmodes#1#2#3% will be sped up with a quit {\cleanuplabel{#3}% \protect\checkedmodetrue\rawprocesscommacommand[\cleanlabel]\dodocheckforallmodes \ifcheckedmode\@EA#1\else\@EA#2\fi} % simple ones \def\doifmodeelse{\unprotect\dodoifmodeelse} \def\doifmode {\unprotect\dodoifmode} \def\doifnotmode {\unprotect\dodoifnotmode} \def\startmode {\unprotect\dostartmode} \def\startnotmode{\unprotect\dostartnotmode} \def\dodoifmodeelse {\docheckformode\firstoftwoarguments\secondoftwoarguments} \def\dodoifmode {\docheckformode\firstofoneargument\gobbleoneargument} \def\dodoifnotmode {\docheckformode\gobbleoneargument\firstofoneargument} \long\def\dostartmode[#1]% {\docheckformode\donothing\dostopmode{#1}} \long\def\dostartnotmode[#1]% {\docheckformode\dostopnotmode\donothing{#1}} \let\stopmode \donothing \let\stopnotmode\donothing \long\def\dostopmode #1\stopmode {} \long\def\dostopnotmode#1\stopnotmode{} \def\doifallmodeselse{\unprotect\dodoifallmodeselse} \def\doifallmodes {\unprotect\dodoifallmodes} \def\doifnotallmodes {\unprotect\dodoifnotallmodes} \def\startallmodes {\unprotect\dostartallmodes} \def\startnotallmodes{\unprotect\dostartnotallmodes} \def\dodoifallmodeselse {\docheckforallmodes\firstoftwoarguments\secondoftwoarguments} \def\dodoifallmodes {\docheckforallmodes\firstofoneargument\gobbleoneargument} \def\dodoifnotallmodes {\docheckforallmodes\gobbleoneargument\firstofoneargument} \long\def\dostartallmodes[#1]% {\docheckforallmodes\donothing\dostopallmodes{#1}} \long\def\dostartnotallmodes[#1]% {\docheckforallmodes\dostopnotallmodes\donothing{#1}} \let\stopallmodes \donothing \let\stopnotallmodes\donothing \long\def\dostopallmodes #1\stopallmodes {} \long\def\dostopnotallmodes#1\stopnotallmodes{} %D \macros %D {every...} %D %D A few every's. \newevery \everyshipout \relax \newevery \everybeforeshipout \relax \newevery \everyaftershipout \relax \newevery \everyfirstshipout \relax \newevery \everylastshipout \relax \newevery \everybye \relax \newevery \everygoodbye \relax \newevery \everystarttext \relax \newevery \everystoptext \relax \newevery \everyforgetall \relax \newevery \everybeforepagebody \relax \newevery \everyafterpagebody \relax \newevery \everybeforeutilityread \relax \newevery \everyafterutilityread \relax \let \everypagebody \everybeforepagebody % backward compatible %newevery \everybeforeutilitywrite \relax \newevery \everycleanupfeatures \relax \newevery \everyinsidefloat \relax \newevery \everyheadstart \relax \newevery \everyendoftextbody \relax \newevery \everybeginofpar \relax \newevery \everyendofpar \relax \newevery \everylistentry \relax \newevery \everymarking \relax \newevery \everysavesortkeys \relax \newevery \everyfont \relax \newevery \everybodyfont \EveryBodyFont \newevery \everyglobalbodyfont \relax \newevery \everyfontswitch \EveryFontSwitch \newevery \everydefinedfont \relax \newevery \everybeforeoutput \relax \newevery \everyafteroutput \relax \newevery \everybeforedisplayformula \relax \def\cleanupfeatures{\the\everycleanupfeatures} \def\forgetall {\the\everyforgetall} %D State mess: \newtoks \everypushsomestate \newtoks \everypopsomestate \def\pushsomestates{\the\everypushsomestate} \def\popsomestates {\the\everypopsomestate } %D For shared \type {\everymath} and \type {\everydisplay}: \newevery \everymathematics \relax \prependtoks \the\everymathematics \to \everymath \prependtoks \the\everymathematics \to \everydisplay % \newevery \everyparflush \relax % collected nodes %D Experimental (used in xml

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\def\bpar{\the\everybeginofpar\ignorespaces} % may interfere with \everypar \def\epar{\ifhmode\removeunwantedspaces\the\everyendofpar\fi} % test prevents problems with \bpar\epar %D More generic (used to be pushcolor etc) \newtoks\everypushproperties \newtoks\everypopproperties \newtoks\everypopsplitproperties \newtoks\everystarttextproperties \newtoks\everystoptextproperties \def\pushproperties {\the\everypushproperties} \def\popproperties {\the\everypopproperties} \def\popsplitproperties {\the\everypopsplitproperties} \def\starttextproperties{\the\everystarttextproperties} \def\stoptextproperties {\the\everystoptextproperties} %D This is pretty important (esp since we now ignore shipouts). %D Actually we should nil all writes, marks, specials. \appendtoks \globallet\popproperties \relax \to \everylastshipout \appendtoks \globallet\popsplitproperties\relax \to \everylastshipout %D \macros %D {defineinputmode,setinputmode} %D %D New. Some work needs to be done. \def\defineinputmode[#1]{\@EA\newtoks\csname every#1inputmode\endcsname} %def\setinputmode [#1]{\the \csname every#1inputmode\endcsname} \def\setinputmode [#1]{\the\executeifdefined{every#1inputmode}\emptytoks} \defineinputmode [TEX] \defineinputmode [XML] \setinputmode [TEX] %D \macros %D {trialtypesetting} %D %D We disable trial typesetting in the output routine, %D just to be sure. % defined in syst-ext \prependtoks \trialtypesettingfalse \to \everybeforepagebody %D \macros %D {ifinpagebody,ifinsidecolumns,ifdoublesided,ifsinglesided} \newif \ifinpagebody \newif \ifinsidecolumns \newif \ifdoublesided \doublesidedfalse \newif \ifsinglesided \singlesidedtrue \newif \ifinsidefloat \newif \ifdoingblocks \newif \ifgridsnapping %D \macros %D {ifprocessingXML} %D %D We need this one even if no \XML\ is supported. \newif\ifprocessingXML %D \macros %D {ifproductionrun} %D %D This boolean can be used to bypass certain %D initializations. \ifx\protectionlevel\undefined \newcount\protectionlevel \fi \newif\ifproductionrun \appendtoks \productionruntrue \to \everydump \appendtoks \ifcase\protectionlevel\else\reportunprotection\fi \to \everydump %D \macros %D {everyboxedcontent, ifboxedcontent, %D startboxedcontent, stopboxedcontent} %D %D This one is relatively new and will be used as a more %D robust test for inner situations. \newif \ifboxedcontent \newevery \everyboxedcontent \relax \appendtoks \boxedcontenttrue \to \everyboxedcontent \def\startboxedcontent{\bgroup\the\everyboxedcontent} \let\stopboxedcontent \egroup %D \macros %D {fastmode} %D %D The command \type {\fastmode} disables some time consuming %D typesetting. \newevery \everyfastmode \relax \newif\iffastmode \def\fastmode {\fastmodetrue \the\everyfastmode} \def\silentmode % ook hier \everysilentmode net als \fastmode {\showmessagesfalse \showwarningsfalse \let\writestatus\gobbletwoarguments} %D \macros %D {pdfoutput} %D %D There are some fundamental differences between producing %D \DVI\ and \PDF\ output, especially when we use \PDFTEX, like %D object reuse, one pass graphic inclusion and the lack of a %D postprocessing stage. Because we must make sure that %D \CONTEXT\ knows what it's up to, we always default to \DVI\ %D mode, even when users explicitly ask for \PDF\ output in the %D \PDFTEX\ configuration file. \ifx\pdfoutput\undefined \else \prependtoks \pdfoutput=0 \to \everyjob \fi %D \macros %D {setvariables,getvariable,getvariabledefault} %D %D \starttyping %D \setvariables[xx][title=] %D \setvariables[xx][title=test test] %D \setvariables[xx][title=test $x=1$ test] % fatal error reported %D \setvariables[xx][title=test {$x=1$} test] %D \setvariables[xx][title] % fatal error reported %D \setvariables[xx][titletitel=e] %D \stoptyping \def\??vars{@@vars} \def\setvariables {\dotripleargument\dosetvariables[\getrawparameters ]} \def\setevariables{\dotripleargument\dosetvariables[\getraweparameters]} \def\setgvariables{\dotripleargument\dosetvariables[\getrawgparameters]} \def\setxvariables{\dotripleargument\dosetvariables[\getrawxparameters]} \def\globalsetvariables % obsolete {\dotripleargument\dosetvariables[\globalgetrawparameters]} % \long\def\dosetvariables[#1][#2][#3]% % {\errorisfataltrue % \def\currentvariableclass{#2}% % \getvariable{#2}\s!reset % #1[\??vars:#2:][#3]% % \getvariable{#2}\s!set % \errorisfatalfalse} % % permit nested definitions while preventing nested set/reset % % wrong: % % \long\def\dosetvariables[#1][#2][#3]% % {\errorisfataltrue % \getrawparameters[\??vars:*:][\s!reset=*,\s!set=*,#3]% % \doifelse{\getvalue{\??vars:*:\s!reset}\getvalue{\??vars:*:\s!set}}{**} % {\doifelse{#2}\currentvariableclass % {#1[\??vars:#2:][#3]} % {\pushmacro\currentvariableclass % \def\currentvariableclass{#2}% % \getvariable{#2}\s!reset % #1[\??vars:#2:][#3]% % \getvariable{#2}\s!set % \popmacro\currentvariableclass}}% % {#1[\??vars:#2:][#3]}% % \errorisfatalfalse} \long\def\dosetvariables[#1][#2][#3]% tricky, test on s-pre-60 {\errorisfataltrue \doifelse{#2}\currentvariableclass {#1[\??vars:#2:][#3]}% {\pushmacro\currentvariableclass \def\currentvariableclass{#2}% \getvariable{#2}\s!reset #1[\??vars:#2:][#3]% \getvariable{#2}\s!set \popmacro\currentvariableclass}% \errorisfatalfalse} \long\def\setvariable #1#2#3{\long\setvalue {\??vars:#1:#2}{#3}} \long\def\setevariable#1#2#3{\long\setevalue{\??vars:#1:#2}{#3}} \long\def\setgvariable#1#2#3{\long\setgvalue{\??vars:#1:#2}{#3}} \long\def\setxvariable#1#2#3{\long\setxvalue{\??vars:#1:#2}{#3}} \beginTEX \def\getvariable#1#2% to be sped up {\csname \ifundefined{\??vars:#1:#2}\s!empty\else\??vars:#1:#2\fi \endcsname} \endTEX \beginETEX \ifcsname \def\getvariable#1#2% to be sped up {\csname \ifcsname\??vars:#1:#2\endcsname\??vars:#1:#2\else\s!empty\fi \endcsname} \endETEX \def\showvariable#1#2% {\showvalue{\ifundefined{\??vars:#1:#2}\s!empty\else\??vars:#1:#2\fi}} \let\currentvariableclass\empty %D \macros %D {doifelsevariable,doifvariable,doifnotvariable} %D %D A few trivial macros: \def\doifelsevariable#1#2% {\ifundefined{\??vars:#1:#2}% \expandafter\secondoftwoarguments \else \expandafter\firstoftwoarguments \fi} \def\doifvariable#1#2% {\ifundefined{\??vars:#1:#2}% \expandafter\gobbleoneargument \else \expandafter\firstofoneargument \fi} \def\doifnotvariable#1#2% {\ifundefined{\??vars:#1:#2}% \expandafter\firstofoneargument \else \expandafter\gobbleoneargument \fi} \def\getvariabledefault#1#2% #3% {\executeifdefined{\??vars:#1:#2}}% {#3} %D \macros %D {defineselector,setupselector} %D %D \starttyping %D \defineselector[caption][max=2,n=2] %D %D \start %D \setupselector[caption][n=1] %D \placelist[figure][criterium=all] %D \stop %D %D \starttext %D \placefigure %D {\select{caption}{zapf}{\input zapf \relax}} %D {} %D \stoptext %D \stoptyping \def\defineselector{\dodoubleargument\dodefineselector} \def\setupselector {\dodoubleargument\dosetupselector} \def\dodefineselector[#1][#2]{\getparameters[\??sx#1][\c!max=2,\c!n=1,#2]} \def\dosetupselector [#1][#2]{\getparameters[\??sx#1][#2]} \unexpanded\def\select#1% {\filterfromnext {\executeifdefined{\??sx#1\c!max}1} {\executeifdefined{\??sx#1\c!n }1}} %D \macros %D {checkvariables} %D %D I'll probably forget that this on exists. \def\checkvariables {\dodoubleargument\docheckvariables} \def\docheckvariables {\dogetparameters\docheckrawvalue} \def\docheckrawvalue#1#2#3% {\doifundefined {\??vars:#1:#2}{\setvalue{\??vars:#1:#2}{#3}} {\doifvaluenothing{\??vars:#1:#2}{\setvalue{\??vars:#1:#2}{#3}}}} %D We store some original meanings, maybe in \type %D {math-ini}. \let\normalat \at \let\normalin \in \let\normalfrom \from \let\normalover \over \let\normalabout \about \let\normalabove \above \let\normalatop \atop \let\normaloverwithdelims \overwithdelims \let\normalabovewithdelims\abovewithdelims \let\normalatopwithdelims \atopwithdelims %D Add-ons: \let\startlayoutcomponent\gobbletwoarguments \let\stoplayoutcomponent \relax %D Label cleanup: \bgroup % some day this will go away / we could use detokenize as well % actually we should handle all discretionaries here \catcode`:=\@@active \gdef\cleanuplabel#1% {\begingroup \let:\lettercolon \xdef\cleanlabel{#1}% \endgroup} \gdef\cleanupprefixedlabel#1#2% {\begingroup \let:\lettercolon \xdef\cleanprefix{#1}% \xdef\cleanlabel {#2}% \endgroup} \gdef\protectlabels {\let:\lettercolon} \global\def\blabelgroup {\begingroup \let:\lettercolon} \global\let\elabelgroup \endgroup \gdef\labelcsname {\begingroup\let:\lettercolon \expandafter\endgroup\csname} \gdef\labelvalue#1% {\labelcsname#1\endcsname} \egroup %D TO BE TESTED FIRST (needs changes in usage too) % \def\cleanuplabel#1% % {\edef\cleanlabel{\detokenize{#1}}} % % \def\cleanupprefixedlabel#1#2% % {\edef\cleanprefix{\detokenize{#1}}% % \edef\cleanlabel {\detokenize{#2}}} % % \def\labelvalue#1% % {\csname\detokenize{#1}\endcsname} % % \let\protectlabels\donothing % % \def\blabelgroup {\begingroup} % why no \let ? % \let\elabelgroup \endgroup %D Concepts: \chardef\conceptmode\zerocount \def\doifconcepttracing {\ifnum\conceptmode>\plustwo \expandafter\firstofoneargument \else \expandafter\gobbleoneargument \fi} \protect \endinput