diff options
Diffstat (limited to 'tex/context/base/spac-grd.mkiv')
| -rw-r--r-- | tex/context/base/spac-grd.mkiv | 866 |
1 files changed, 15 insertions, 851 deletions
diff --git a/tex/context/base/spac-grd.mkiv b/tex/context/base/spac-grd.mkiv index 3fa47de57..e55c7db48 100644 --- a/tex/context/base/spac-grd.mkiv +++ b/tex/context/base/spac-grd.mkiv @@ -11,11 +11,22 @@ %C therefore copyrighted by \PRAGMA. See mreadme.pdf for %C details. +%D This module will be merged intio spac-ver.mkiv. + \writestatus{loading}{ConTeXt Spacing Macros / Grid Snapping} -\unprotect +% buff-ver.mkiv: halfline spacing +% strc-mat.mkiv: configure math grid (new code needed) +% page-one.mkiv: to be checked +% page-mul.mkiv: to be checked and redone +% page-sid.mkiv: to be checked +% page-set.mkiv: to be checked +% strc-not.mkiv: to be checked +% strc-ren.mkiv: to be checked +% strc-flt.mkiv: to be checked (captions, probably top/bottom) +% core-mis.mkiv: to be checked (placement, probbaly harmless) -\newif \iffuzzyvskip +\unprotect %D Helpers: @@ -94,13 +105,6 @@ \let\thenegtopbaselinecorrection\!!zeropoint \let\thenegbotbaselinecorrection\!!zeropoint -\definepalet - [grid] - [ one=red, - two=green, - three=blue, - four=gray] - \def\setbaselinecorrections {\setbox0\hbox{\setstrut\strut}% \setbox2\hbox{(}% @@ -140,18 +144,6 @@ \kern\strutdp \prevdepth\strutdp} -% \def\baselinecorrection -% {\endgraf -% \ifvmode -% \ifdim\prevdepth<\maxdimen -% \ifdim\prevdepth<\zeropoint \else -% \ifdim\prevdepth<\strutdp -% \dobaselinecorrection -% \fi -% \fi -% \fi -% \fi} - \def\baselinecorrection {\endgraf \ifvmode @@ -177,31 +169,6 @@ \fi \fi} -% Beware, keep this one as it is, see for instance module -% m-steps.tex, where we apply a \localhsize to the \vbox, in -% order to follow narrower and side floats ! - -% \def\startbaselinecorrection -% {\baselinecorrection -% \ifvmode -% \bgroup -% \setbox\scratchbox\vbox\bgroup -% \ignorespaces -% \let\stopbaselinecorrection\dostopbaselinecorrection -% \else -% \let\stopbaselinecorrection\relax -% \fi} - -% \def\dostopbaselinecorrection % I have to check columns yet. -% {\endgraf -% \egroup -% \topbaselinecorrection -% \box\scratchbox -% \botbaselinecorrection -% \egroup} - -% \let\stopbaselinecorrection=\relax - \def\startbaselinecorrection {\bgroup \let\stopbaselinecorrection\egroup @@ -241,9 +208,6 @@ %D is not needed, but I want to look the visualization as good %D as possible too. -% \def\offbaselinecorrection % Can be used inside correction. -% {\def\startbaselinecorrection{\bgroup\let\stopbaselinecorrection\egroup}} - \chardef\baselinecorrectionmode\plusone \def\onbaselinecorrection {\chardef\baselinecorrectionmode\plusone } @@ -255,17 +219,6 @@ %D %D The actual top and bottom corrections are implemented as: -% \def\topbaselinecorrection -% {\ifvmode \ifdim\pagegoal<\maxdimen -% \bgroup -% \setbaselinecorrections -% \whitespace -% \nointerlineskip -% \dotopbaselinecorrection -% \egroup -% \fi \fi} - - \def\topbaselinecorrection {\ifvmode \ifdim\pagegoal<\maxdimen \forcedtopbaselinecorrection @@ -292,804 +245,15 @@ \fi} \let\forcedbotbaselinecorrection\botbaselinecorrection - -%D Still very experimental and therefore undocumented. - -\newif\ifgridsnapping % UNDER DEVELOPMENT, USE WITH CARE -\newif\ifforcepresnap \forcepresnaptrue % false in mixed single/double -\newif\ifstrutsnapping \strutsnappingtrue % sometimes handy to be false - -\def\positiveextrasnap {\gdef\extrasnapsign{+}} -\def\negativeextrasnap {\gdef\extrasnapsign{-}} - -\def\extrasnapreset {\global\chardef\@@extrasnap0 - \positiveextrasnap} -\def\extrasnapbefore {\global\chardef\@@extrasnap1 } -\def\extrasnaparound {\global\chardef\@@extrasnap2 } -\def\extrasnapafter {\global\chardef\@@extrasnap3 } - -\def\enablepresnapcorrection {\global\chardef\@@presnap\zerocount} -\def\disablepresnapcorrection {\global\chardef\@@presnap\plusone} - -\extrasnapreset \enablepresnapcorrection - -\newif\iftracegridsnapping -\newif\ifshowgridboxes -\newif\ifshowfuzzyskips - -\let\showgridboxes\showgridboxestrue - -\def\showgridsnapping - {\tracegridsnappingtrue - \showgridboxestrue} - -\chardef\@@alignsnap =0 -\chardef\@@alignsnapbox =0 -\chardef\@@alignsnapmethod=0 - -\let\presnapskip \!!zeropoint \def\presnap {-} -\let\postsnapskip\!!zeropoint \let\postsnap\presnap - -\newcount\currentgridsnap - -\def\tracedsnapping - {\iftracegridsnapping - \llap - {\setlayoutcomponentattribute\v!grid\v!test - \hbox \layoutcomponentboxattribute - {\infofont - \global\advance\currentgridsnap\plusone - \color[grid:three] - {\vl\presnapskip - \vl\presnap - \vl\postsnap - \ifcase\@@alignsnapbox\relax\vl\ifcase\@@extrasnap00\or\extrasnapsign0\or\extrasnapsign\extrasnapsign\or0\extrasnapsign\fi\fi - \vl\the\currentgridsnap\vl}}}% - \fi} - -\def\snaptogrid% [#1]#2 -> #2 == \hbox|\vbox - {\dosingleempty\dosnaptogrid} - -% \def\dosnaptogrid[#1]% -% {\ifgridsnapping -% \iffirstargument\doifsomething{#1}{\verplaatsopgrid[#1]}\fi -% \expandafter\dodosnaptogrid -% \fi} - -% \def\dosnaptogrid[#1]% -% {\resetlastlinewidth % maybe in more places, otherwise spacing gets messed up -% \ifgridsnapping -% \iffirstargument\doifsomething{#1}{\moveongrid[#1]}\fi -% \expandafter\dodosnaptogrid -% \fi} - -\def\dosnaptogrid[#1]% - {\resetlastlinewidth % maybe in more places, otherwise spacing gets messed up - \doifinsetelse\v!force{#1}% - {\moveongrid[#1]% - \dodosnaptogrid} - {\ifgridsnapping - \doifsomething{#1}{\moveongrid[#1]}% - \expandafter\dodosnaptogrid - \fi}} - -% \def\forcedpresnapcorrection % test this on 'details' -% {\ifforcepresnap -% \ifvmode \else \par \fi % new -% % we don't want top of page space when 'top' option -% %\verticalstrut\nobreak\vskip-\struttotal -% %\verticalstrut\vskip-\struttotal -% % nobreak really needed -% \allowbreak\verticalstrut\nobreak\vskip-\struttotal -% %\ifdim\pagetotal>\topskip \else -% % eigenlijk signal -% %\writestatus{grid}{removing dummy at top of page}% -% %\bgroup -% %\output{\setbox\scratchbox\box255}% -% %\penalty\outputpenalty -% %\egroup -% %\fi -% \fi} - -\def\forcedpresnapcorrection % test this on 'details' - {\ifforcepresnap - \ifvmode \else \par \fi % new - % we don't want top of page space when 'top' option - % \verticalstrut\nobreak\vskip-\struttotal - % \verticalstrut\vskip-\struttotal - % \nobreak really needed - % \dosomebreak\allowbreak % no: spoils heads, so only under know situation, not in snapper - \verticalstrut - \nobreak - \vskip-\struttotal - %\ifdim\pagetotal>\topskip \else - % eigenlijk signal - %\writestatus{grid}{removing dummy at top of page}% - %\bgroup - %\output{\setbox\scratchbox\box255}% - %\penalty\outputpenalty - %\egroup - %\fi - \fi} - -\def\setgridtracebox#1[#2]% % maybe reverse the order - {\setbox\nextbox#1% - {\hbox - {\hbox to \zeropoint - {\setlayoutcomponentattribute\v!grid\v!test - \color[grid:#2]{\ruledhbox \layoutcomponentboxattribute {\fakebox\nextbox}}% - \hss}% - \flushnextbox}}} -\newif\ifboxedsnapping \boxedsnappingtrue - -\chardef\depthsnapmethod \plusone % downward compatible, minus one line -\chardef\heightsnapmethod\plusone % downward compatible, minus one line - -\def\dodosnaptogrid - {\dowithnextbox - {\bgroup - \ifcase\@@alignsnapmethod \or - % we're dealing with text with a possible big depth/height - \chardef\depthsnapmethod \plustwo - \chardef\heightsnapmethod\plustwo - \fi - \ifdim\nextboxht<\textheight % handle special case (like page fig) - \ifcase\@@alignsnapbox\relax - \ifcase\@@alignsnap\else % 1=top 2=high 3=middle 4=low - \ifshowgridboxes - \setgridtracebox\hbox[two]% - \fi - %\getnoflines{\nextboxht}% - \getnoflines\nextboxht - \setbox\nextbox\vbox to \noflines\lineheight - {\ifnum\@@alignsnap=1 \kern\lineheight\kern-\topskip\fi - \ifnum\@@alignsnap>2 \vfill\fi - \flushnextbox - \ifnum\@@alignsnap<4 \vfill\fi}% - \fi - \ifshowgridboxes - \setgridtracebox\hbox[three]% - \fi - \forgetall - \par - \ifvbox\nextbox - \setbox\nextbox\hbox{\flushnextbox}% don't ask - \fi - \scratchskip\lastskip - \edef\presnapskip{\the\lastskip}% - % mixing single/double columns sometimes goes wrong, - % check 'som' document - \ifinsidecolumns - \forcepresnaptrue - \fi - \forcedpresnapcorrection - \ifdim\nextboxht>\strutht - \scratchdimen\nextboxht - \ifcase\@@presnap\relax - \ifdim\scratchskip>\zeropoint\relax - \scratchcounter\scratchskip - \advance\scratchcounter -\openlineheight - \ifnum\scratchcounter<0 - \scratchcounter-\scratchcounter - \fi - \ifnum\scratchcounter<10 % \lastkip is about \openlineheight - \advance\scratchdimen -\openstrutdepth - \edef\presnapskip{*\presnapskip}% - \else\ifdim\scratchskip>\openlineheight - %<\openlineheight \else - \advance\scratchdimen -\openstrutdepth - \edef\presnapskip{*\presnapskip}% - \fi\fi - \fi - \fi - % \getnoflines\scratchdimen % maybe raw ? - % \advance\noflines -1 - \ifcase\heightsnapmethod - % raw - \or - \advance\scratchdimen-\lineheight % tight (default) - \or - \advance\scratchdimen-\strutheight % fit (text) - \or - \advance\scratchdimen-\strutheight % tolerant - \advance\scratchdimen-\roundingeps - \fi - \getnoflines\scratchdimen - \ifnum\noflines>0 - \scratchdimen\noflines\lineheight - \else - \scratchdimen\zeropoint - \fi - \else - \scratchdimen\zeropoint - \fi - \ifnum\@@extrasnap=1 \advance\scratchdimen \extrasnapsign \lineheight \fi - \ifnum\@@extrasnap=2 \advance\scratchdimen \extrasnapsign.5\lineheight \fi - \edef\presnap{\the\scratchdimen}% - \ifstrutsnapping - \ifboxedsnapping - \getrawnoflines\scratchdimen - \advance\scratchdimen-\noflines\lineheight - \vskip\scratchdimen % disappears at top of page - \dorecurse\noflines{\verticalstrut\nobreak}% - \else \ifdim\scratchdimen=\zeropoint - % nothing to skip - \else % disappears at top of page - \vskip\scratchdimen - \fi \fi - \fi - \ifdim\nextboxdp>\strutdp - % \getnoflines\nextboxdp - % \advance\noflines \minusone - \scratchdimen\nextboxdp\relax - \ifcase\depthsnapmethod - % raw - \or - \advance\scratchdimen-\lineheight % tight (default) - \or - \advance\scratchdimen-\strutdepth % fit (text) - \or - \advance\scratchdimen-\strutdepth % tolerant - \advance\scratchdimen-\roundingeps - \fi - \getnoflines\scratchdimen - \ifnum\noflines>0 - \scratchdimen\noflines\lineheight - \else - \scratchdimen\zeropoint - \fi - \else - \scratchdimen\zeropoint - \fi - \ifnum\@@extrasnap=2 \advance\scratchdimen \extrasnapsign.5\lineheight \fi - \ifnum\@@extrasnap=3 \advance\scratchdimen \extrasnapsign \lineheight \fi - \edef\postsnap{\the\scratchdimen}% - \ifstrutsnapping - \nextboxht\strutht - \nextboxdp\strutdp - \else - \scratchdimen\presnap - \advance\scratchdimen \strutht - \nextboxht\scratchdimen - \scratchdimen\postsnap - \advance\scratchdimen \strutdp - \nextboxdp\scratchdimen - \fi - \hbox{\tracedsnapping\flushnextbox}% - \ifstrutsnapping - \ifdim\scratchdimen=\zeropoint\else\vskip\scratchdimen\fi - \fi - \else - \scratchdimen\nextboxht\relax - \ifcase\@@alignsnapbox - % can't happen here - \or - \getrawnoflines\scratchdimen - \else - \getnoflines \scratchdimen - \fi - \scratchdimen\noflines\lineheight\relax - \advance\scratchdimen-\strutdepth - % spoils the whole game (fit/broad/line) - % \ifnum\pagetotal>\zeropoint \else % disable this as option - % \advance\scratchdimen-\strutheight - % \advance\scratchdimen+\topskip - % \fi - \dimen0=\scratchdimen - \dimen2=\strutdepth - \ifshowgridboxes - \setgridtracebox\hbox[two]% - \fi - \nextboxdp\strutdp - \dimen4=\nextboxht - \dimen6=\nextboxdp - \iftracegridsnapping - \setbox\scratchbox\hbox - {\scratchdimen\@@alignsnapamount\relax - \ifdim\scratchdimen<\zeropoint - \tracedgridamount\zeropoint{-\scratchdimen}% - \else - \tracedgridamount\scratchdimen\zeropoint - \fi}% - \smashbox\scratchbox - \setbox\nextbox\hbox{\box\scratchbox\flushnextbox}% - \fi - \setbox\nextbox\hbox - {\scratchdimen\@@alignsnapamount\relax - \ifcase\@@alignsnapdepth\or - % don't change this ever ! - \ifdim\dimen0<\lineheight - % otherwise it is ok, but ending up inside - % the next paragraph is seldom what we want, - % so we move one line up - \advance\scratchdimen-\lineheight - \advance\scratchdimen\strutheight - \else - % otherwise we can move down to the - % baseline - \advance\scratchdimen\dimen6 % == \strutdepth - \fi - \fi - \lower\scratchdimen\flushnextbox}% - \nextboxht\dimen4 - \nextboxdp\dimen6 - \ifnum\@@alignsnap<4 % 4 = regel - \setbox\nextbox\vbox to \scratchdimen - {\forgetall - \ifnum\@@alignsnap>2 \vfill\fi % 3 4 - \flushnextbox - \nointerlineskip % \offinterlineskip - \ifnum\@@alignsnap<4 \vfill\fi % 2 3 - \kern\zeropoint}% - \fi - \ifshowgridboxes - \setgridtracebox\vbox[three]% - \fi - \scratchdimen\@@alignsnapamount - \edef\presnapskip{\the\scratchdimen}% - \ifnum\@@alignsnap>2 \def\presnap {+}\fi - \ifnum\@@alignsnap<4 \def\postsnap{+}\fi - \setbox\nextbox\hbox{\tracedsnapping\flushnextbox}% - \par - \nextboxht\dimen0 - \nextboxdp\dimen2 - \forcedpresnapcorrection - \nointerlineskip - \flushnextbox - \fi - \else - \setbox\nextbox\vbox to \textheight - {\ifdim\nextboxdp=\zeropoint - \hbox{\lower\strutdepth\flushnextbox} - \else % this branch is yet untested - \vss - \hbox{\lower\nextboxdp\flushnextbox} - \vskip-\strutdepth - \fi}% - \nextboxdp\strutdepth - \flushnextbox - \fi - \extrasnapreset - \enablepresnapcorrection - \global\chardef\@@alignsnap\zerocount - \global\chardef\@@alignsnapbox\zerocount - \egroup}} - -\def\tracedgridamount#1#2% - {\startcolor[grid:four]% - \setlayoutcomponentattribute\v!grid\v!test - \hbox \layoutcomponentboxattribute{\vrule\!!width\nextboxwd\!!height#1\!!depth#2}% - \stopcolor} - -\def\snaptomathgrid % probably not working ok, also kind of obsolete - {\ifgridsnapping - \dowithnextbox - {\blank[\v!line]\snaptogrid\vbox{\flushnextbox}\blank[\v!line]} - \vbox\bgroup - \forgetdisplayskips - \@EA\let\@EA\next - \fi} - -\def\topsnaptogrid - {\ifgridsnapping - \dowithnextbox - {\scratchdimen\nextboxht - \advance\scratchdimen -\strutht - \advance\scratchdimen \topskip - \nextboxht\scratchdimen - \nextboxdp\zeropoint - \flushnextbox - \kern\lineheight - \kern-\topskip - \nointerlineskip} - \hbox - \fi} - -% \def\centertogrid % meant for special situations -% {\ifgridsnapping -% \dowithnextboxcontent -% {\ignorespaces} -% {\bgroup -% \par -% \scratchdimen\nextboxht -% \advance\scratchdimen \nextboxdp -% \getnoflines\scratchdimen -% \setbox\nextbox\vbox to \noflines\lineheight -% {\forgetall -% \vskip\zeropoint \!!plus \nextboxht -% \copy\nextbox -% \kern.5\strutdp % VOORLOPIGE WAARDE -% \vskip\zeropoint \!!plus \nextboxdp}% -% \noindent\snaptogrid\vbox{\flushnextbox}% -% \egroup} -% \vbox % was \hbox -% \fi} - -% The next implementation is sub-optimal -% -% \def\centertogrid % usage: see ie pascal / stepcharts -% {\snaptogrid[\v!midden,.5\strutdp]\vbox} - -\def\centertogrid % meant for special situations - {\ifgridsnapping - \dowithnextboxcontent - {\ignorespaces} - {\bgroup - \par - \scratchdimen\nextboxht - \advance\scratchdimen \nextboxdp - \getnoflines\scratchdimen - \setbox\nextbox\vbox to \noflines\lineheight - {\forgetall - \vss - \topbaselinecorrection - \copy\nextbox - \botbaselinecorrection - \vss}% - \setbox\nextbox\hbox{\lower\strutdp\flushnextbox}% - \forgeteverypar % new per 3/4/2008, prevents duplicate pos nodes resulting in extra whitespace - \noindent\snaptogrid\vbox{\flushnextbox}% - \egroup} - \vbox % was \hbox - \fi} - -% testbed for \centertogrid -% -% \strut Bruggetje -% \startlinecorrection -% \startcombination -% {\framed{test}} {} {\framed{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection -% \startcombination[2*2] -% {\framed{test}} {} {\framed{test}} {} -% {\framed{test}} {} {\framed{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection[blank] -% \startcombination -% {\framed{test}} {} {\framed{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection[blank] -% \startcombination[2*2] -% {\framed{test}} {} {\framed{test}} {} -% {\framed{test}} {} {\framed{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection -% \startcombination -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection -% \startcombination[2*2] -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection[blank] -% \startcombination -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% \stopcombination -% \stoplinecorrection -% \strut Bruggetje -% \startlinecorrection[blank] -% \startcombination[2*2] -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% {\framed[lines=1]{test}} {} {\framed[lines=1]{test}} {} -% \stopcombination -% \stoplinecorrection - -\ifx\startbaselinecorrection\undefined \wait \fi % change order - -\let\normalstartbaselinecorrection=\startbaselinecorrection +\let\normalstartbaselinecorrection\startbaselinecorrection \def\startbaselinecorrection {\ifgridsnapping - \centertogrid\bgroup + \snaptogrid[v!normal]\vbox\bgroup \let\stopbaselinecorrection\egroup \else \normalstartbaselinecorrection \fi} -\chardef\gridboxlinenomode\plusone -\chardef\gridboxlinemode \plusone % 0:nothing 1:all 2:lines 3:frame - -\def\gridboxvbox {\ifcase\gridboxlinemode\vbox\or\ruledvbox\or\vbox\or\ruledvbox\else\ruledvbox\fi} -\def\gridboxwidth{\ifcase\gridboxlinemode0\or.5\or.5\or0\else.5\fi\testrulewidth} - -\def\setgridbox#1#2#3% - {\setbox#1\gridboxvbox to #3 % given size - {\forgetall - \resetteststrut - \offinterlineskip - \hsize#2% - \baselinerulefalse - \gridboxvbox % calculated size - {\getrawnoflines{#3}% \getnoflines{#3}% - \vskip\topskip - \vskip-\strutht - \scratchdimen#2\advance\scratchdimen \lineheight - \dorecurse\noflines - {\strut - \hskip-.5\lineheight - \ifcase\gridboxlinenomode\or - \rlap - {\hskip.2\bodyfontsize\hskip\scratchdimen - \infofont\hbox to 1em{\hss\recurselevel}}% - \or - \llap - {\infofont\hbox to 1em{\hss\recurselevel}% - \hskip.2\bodyfontsize}% - \fi - \vrule - \!!height \gridboxwidth - \!!depth \gridboxwidth - \!!width \scratchdimen - \par}} - \vfill}} - -%D Some intervention macros: - -\def\gridwarning#1{\message{[beware of #1 extra snap]}} - -\global\let\@@alignsnapamount\!!zeropoint -\global\chardef\@@alignsnapdepth0 - -\def\@@unknowngriddisplacement - {\global\chardef\@@alignsnapbox\plusthree - \global\let\@@alignsnapamount\commalistelement} - -\def\domoveongrid[#1]% - {\ifgridsnapping\doifsomething{#1}{\dodomoveongrid[#1]}\fi} - -\def\dodomoveongrid[#1]% some day : speed up - {\global\chardef\@@alignsnap\zerocount - \global\chardef\@@alignsnapbox\zerocount - \global\chardef\@@alignsnapdepth\zerocount - \global\chardef\@@alignsnapmethod\zerocount - \global\let\@@alignsnapamount\!!zeropoint - \donefalse - \expanded{\processallactionsinset[#1]} - [\v!standard=>, - \v!normal=>, % to be sure - \v!yes=>, % to be sure - \v!top=>\gridwarning+\positiveextrasnap\extrasnapbefore, - \v!bottom=>\gridwarning+\positiveextrasnap\extrasnapafter, - \v!both=>\positiveextrasnap\extrasnaparound, - -\v!top=>\gridwarning-\negativeextrasnap\extrasnapbefore, - -\v!bottom=>\gridwarning-\negativeextrasnap\extrasnapafter, - -\v!both=>\negativeextrasnap\extrasnaparound, - \v!text=>\global\chardef\@@alignsnapmethod\plusone, % accurate calculations - \v!page=>\global\chardef\@@alignsnap\plusone, % topskip - \v!high=>\global\chardef\@@alignsnap\plustwo, - \v!middle=>\global\chardef\@@alignsnap\plusthree, - \v!low=>\global\chardef\@@alignsnap\plusfour, - \v!fit=>\global\chardef\@@alignsnapbox\plusone, % new - \v!broad=>\global\chardef\@@alignsnapbox\plustwo, % new - \v!depth=>\global\chardef\@@alignsnapdepth\plusone, % new - \v!line=>\global\chardef\@@alignsnapbox\plusthree -% \global\chardef\@@alignsnapdepth\plusone - \global\chardef\@@alignsnap\plusfour, - \v!reset=>\positiveextrasnap\extrasnapreset, - \v!none=>\global\chardef\@@alignsnap\zerocount - \global\chardef\@@alignsnapbox\zerocount, - \v!force=>, % turns on grid snapping even when not on - \s!default=>, - \s!unknown=>\@@unknowngriddisplacement]} - -\def\moveongrid - {\dosingleempty\domoveongrid} - -\def\doplaceongrid[#1]% - {\domoveongrid[#1]\snaptogrid\vbox} - -\def\placeongrid - {\dosingleempty\doplaceongrid} - -%D Snapping is rather robust as long as we use whole lines. -%D Half lines of white space can however be handled when they -%D come in pairs. The corrections needed when crossing page -%D boundaries in the middle of such a pair, are handled by -%D macros that are (named) sort of fuzzy. This fuzzy mechanism -%D was written as an extension to the grid typesetting needed -%D for typesetting (part of) the \MAPS. -%D -%D \starttyping -%D \setuptyping -%D [before={\blank[halfline]}, -%D after={\blank[halfline]}] -%D \stoptyping - -\newif \iffuzzyvskip -\newif \iffuzzysnapdone -\newif \iffuzzysnapping -\newif \iffuzzysnapped -\chardef \fuzzysnappedleft=0 % ==1 when fuzzybegin still open -\newpersistentmark\fuzzymark % (!) -\newcount \fuzzymarker -\newbox \fuzzysnapbox -\newbox \fuzzysnapsplit - -\def\dosyncfuzzyvskip - {\ifvmode\ifdim\lastskip<\lineheight\ifdim\lastskip>\zeropoint - \bgroup % - added 28/2/2003: check this, there was no - - \endgraf\forgetall\verticalstrut\nobreak\vskip-\struttotal - \egroup - \fi\fi\fi} - -\def\fuzzyvskip#1% - {\iffuzzysnapdone - \dosyncfuzzyvskip % NEWER - \endfuzzysnapping - \vskip#1\relax - \global\fuzzysnapdonefalse - \else - \vskip#1\relax - \beginfuzzysnapping - \global\fuzzysnapdonetrue - \fi} - -\def\setfuzzymark#1#2#3% #1/#2 => error recovery - {\ifgridsnapping - \global\fuzzysnappingtrue - \global\advance\fuzzymarker \ifodd\fuzzymarker#1\else#2\fi - \nobreak - \ifshowfuzzyskips - \hbox{\color[grid:three] - {\llap{\infofont#3\vl\the\fuzzymarker}\nobreak - \vrule\!!width\hsize\!!height.1\lineheight}} - \nobreak - \fi - %[\the\fuzzymarker] - %\expandafter\fuzzymark\expandafter{\the\fuzzymarker}% - \expandafter\rawsetmark\expandafter\fuzzymark\expandafter{\the\fuzzymarker}% - \nobreak - \fi} - -\def\beginfuzzysnapping{\setfuzzymark21\v!start} % odd -\def\endfuzzysnapping {\setfuzzymark12\v!stop } % even - -\def\removelastfuzzyvskip - {\ifgridsnapping - \iffuzzysnapping - \ifdim\lastskip<\openlineheight - \else - \removelastskip - \fi - \else - \removelastskip - \fi - \else - \removelastskip - \fi} - -\def\docheckfuzzysnap#1% - {\bgroup - \dontcomplain - \setbox\fuzzysnapbox\copy#1\relax - \setbox\fuzzysnapsplit\vsplit\fuzzysnapbox to 1\lineheight - \let\topfuzzymark\empty % indeed here ... no real mark - \getsplitmarks\fuzzymark -% \ifcase0\topfuzzymark - \ifcase0\rawgetsplittopmark\fuzzymark - \global\chardef\fuzzysnappedleft\zerocount - \global\fuzzysnappedfalse -% \else\ifodd\topfuzzymark - \else\ifodd\rawgetsplittopmark\fuzzymark - \global\chardef\fuzzysnappedleft\plusone - \global\fuzzysnappedtrue - \else - \global\chardef\fuzzysnappedleft=2 - \global\fuzzysnappedtrue - \fi\fi - \iffuzzysnapped \else - \doloop - {\ifvoid\fuzzysnapbox - \exitloop - \else - \setbox\fuzzysnapsplit=\vsplit\fuzzysnapbox to \lineheight - %\let\topfuzzymark=\empty % ... but not here - \getsplitmarks\fuzzymark -% \ifcase0\topfuzzymark - \ifcase0\rawgetsplittopmark\fuzzymark - % continue -% \else\ifodd\topfuzzymark - \else\ifodd\rawgetsplittopmark\fuzzymark - \exitloop - \else - \global\chardef\fuzzysnappedleft\plusone - \global\fuzzysnappedtrue - \exitloop - \fi\fi - \fi}% - \fi - \egroup} - -\def\getfuzzysnapcorrection#1% - {\global\let\presnapcorrection \relax - \global\let\postsnapcorrection\relax - \ifgridsnapping\iffuzzysnapping - \docheckfuzzysnap{#1}% - \iffuzzysnapped - \iftracegridsnapping - \gdef\presnapcorrection - {\color[grid:four]{\hrule\!!height.5\openlineheight\!!width\hsize}}% - \else - \gdef\presnapcorrection{\kern.5\openlineheight}% - \fi - \gdef\postsnapcorrection{\kern-.5\openlineheight}% get the height ok - \fi - \fi\fi} - -\def\fuzzysnappedbox#1#2% \box<n> \unvbox<n> - {\getfuzzysnapcorrection{#2}% - \presnapcorrection - #1#2% - \postsnapcorrection} - -\def\adaptfuzzypagegoal - {\ifgridsnapping\iffuzzysnapping\ifcase\fuzzysnappedleft\or % see dopagecontents - \scratchdimen\pagegoal - \advance\scratchdimen -.5\openlineheight - \global\pagegoal\scratchdimen - \global\advance\vsize -.5\openlineheight - \global\chardef\fuzzysnappedleft0 - \fi\fi\fi} - -%D New, experimental, used in caption snapping: -%D -%D \starttyping -%D \startcolumnset -%D -%D \setupcaption[figure][style=\tfx\setupinterlinespace,inbetween=,grid=top] -%D -%D \placefigure [lrtb] {\dorecurse{5}{green gras}} -%D {\externalfigure[dummy][width=\textwidth,height=3cm,grid=height]} -%D \placefigure [lrtb] {\dorecurse{15}{green gras}} -%D {\externalfigure[dummy][width=\textwidth,height=3cm,grid=height]} -%D -%D \setupcaption[figure][style=\tfx\setupinterlinespace,inbetween=,grid=bottom] -%D -%D \placefigure [rltb] {\dorecurse{5}{green gras}} -%D {\externalfigure[dummy][width=\textwidth,height=3cm,grid=height]} -%D \placefigure [rltb] {\dorecurse{15}{green gras}} -%D {\externalfigure[dummy][width=\textwidth,height=3cm,grid=height]} -%D -%D \input thuan -%D -%D \stopcolumnset -%D \stoptyping - -\def\moveboxontogrid#1#2#3% box method firstlineht % experimental ! ! ! - {\doifsomething{#2} - {\getnoflines{\ht#1}% no depth taken into account, depth preserved - \scratchdimen\noflines\lineheight - \advance\scratchdimen-\strutdp - \bgroup - \advance\scratchdimen-\onepoint % be a bit tolerant - \ifdim\scratchdimen>\ht#1\relax - \egroup - \doif{#2}\v!top {\setbox#1\vbox to \scratchdimen{\vskip-#3\vskip\strutht\box#1\vfill}}% - \doif{#2}\v!bottom{\setbox#1\vbox to \scratchdimen{\vfill\box#1\removedepth}}% - \dp#1\strutdp - \else - \egroup - \ht#1\scratchdimen - \dp#1\strutdp - \fi}} - -%D New: - -\let\checkgridsnapping\relax - \protect \endinput |