diff options
author | Karl Berry <karl@freefriends.org> | 2016-04-22 22:14:39 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2016-04-22 22:14:39 +0000 |
commit | fc4466b32ed330a956ac603b00fd145524cff49a (patch) | |
tree | 2c50e2b8de13aa9233b2c76dffe201558f169e86 /Master/texmf-dist/tex/context/base/supp-box.mkiv | |
parent | 50e2368597d5f6fe2057195d0ae6a9f2044923e4 (diff) |
context (22apr16)
git-svn-id: svn://tug.org/texlive/trunk@40691 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/context/base/supp-box.mkiv')
-rw-r--r-- | Master/texmf-dist/tex/context/base/supp-box.mkiv | 2913 |
1 files changed, 0 insertions, 2913 deletions
diff --git a/Master/texmf-dist/tex/context/base/supp-box.mkiv b/Master/texmf-dist/tex/context/base/supp-box.mkiv deleted file mode 100644 index 54b0e2860a3..00000000000 --- a/Master/texmf-dist/tex/context/base/supp-box.mkiv +++ /dev/null @@ -1,2913 +0,0 @@ -%D \module -%D [ file=supp-box, -%D version=1995.10.10, -%D title=\CONTEXT\ Support Macros, -%D subtitle=Boxes, -%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 Support Macros / Boxes} - -\unprotect - -\registerctxluafile{supp-box}{1.001} - -% This file is partially cleaned up. - -% handy to have -% -% \hbox to \hsize -% {\en -% \switchnaarkorps[5pt]% -% \emergencystretch2em -% \dimen0=\baselineskip -% \baselineskip=\dimen0 plus 1pt -% \hsize=.2\hsize -% \vsize=2\hsize -% \ruledvbox to \vsize{\input tufte \par}\hss -% \ruledvbox to \vsize{\input tufte \par\kern-\prevdepth}\hss -% \ruledvbox to \vsize{\input tufte \par\kern0pt}\hss -% \ruledvbox to \vsize{\input tufte \par\vfill}\hss -% \ruledvbox to \vsize{\input tufte \par\kern-\prevdepth\vfill}} -% -% \hbox to \hsize -% {\en -% \switchnaarkorps[5pt]% -% \emergencystretch2em -% \dimen0=\baselineskip -% \baselineskip=\dimen0 plus 1pt -% \hsize=.18\hsize -% \vsize=2.5\hsize -% \setbox0=\vbox{\input tufte\relax}% -% \ruledvbox to \vsize{\unvcopy0}\hss -% \ruledvbox to \vsize{\unvcopy0\kern-\dp0}\hss -% \ruledvbox to \vsize{\unvcopy0\kern0pt}\hss -% \ruledvbox to \vsize{\unvcopy0\vfill}\hss -% \ruledvbox to \vsize{\unvcopy0\kern-\dp0\vfill}} - -%D \macros -%D {dontcomplain} -%D -%D The next macro suppresses over- and underfull messages which -%D often makes sense when we deal with boxes. - -\unexpanded\def\dontcomplain - {\hbadness\plustenthousand - \vbadness\plustenthousand - \hfuzz \maxdimen - \vfuzz \maxdimen} - -%D This module implements some box manipulation macros. Some -%D are quite simple, some are more advanced and when understood -%D well, all can be of use. -%D -%D \macros -%D {strutdp,strutht,strutwd} -%D -%D The next shortcuts save memory and keying. The width is -%D normally zero points (if not, you're in trouble). These -%D shortcuts can be used like a dimension, opposite to the -%D core macros \type {\strutdepth} and alike, which are -%D values. - -\def\strutdp {\dp\strutbox} -\def\strutht {\ht\strutbox} -\def\strutwd {\wd\strutbox} -\def\struthtdp{\dimexpr\ht\strutbox+\dp\strutbox\relax} - -%D \macros -%D {voidbox,nextbox} -%D -%D Let's start with an easy one. The next macro hides the -%D ugly \type {@} in \type {\voidb@x}. - -\ifdefined\voidbox \else \newbox\voidbox \fi -\ifdefined\nextbox \else \newbox\nextbox \fi - -%D \macros -%D {nextdepth} -%D -%D Let's start with a rather simple declaration. Sometimes we -%D need to save the \TEX\ \DIMENSION\ \type{\prevdepth} and -%D append it later on. The name \type{\nextdepth} suits -%D this purpose well. - -\newdimen\nextdepth - -%D \macros -%D {smashbox, smashedbox} -%D -%D Smashing is introduced in \PLAIN\ \TEX, and stands for -%D reducing the dimensions of a box to zero. The most resolute -%D one is presented first. - -\unexpanded\def\smashbox#1% - {\wd#1\zeropoint - \ht#1\zeropoint - \dp#1\zeropoint} - -\unexpanded\def\smashboxed#1% - {\wd#1\zeropoint - \ht#1\zeropoint - \dp#1\zeropoint - \box#1\relax} - -%D \macros -%D {hsmashbox,vsmashbox} -%D -%D Smashing can be used for overlaying boxes. Depending on -%D the mode, horizontal or vertical, one can use: - -\unexpanded\def\hsmashbox#1% - {\wd#1\zeropoint} - -\unexpanded\def\vsmashbox#1% - {\ht#1\zeropoint - \dp#1\zeropoint} - -%D The next implementation is less sensitive for spurious -%D spaces. - -\newcount\c_boxes_register - -\unexpanded\def\smashbox - {\afterassignment\syst_boxes_smash_boxes_register\c_boxes_register} - -\def\syst_boxes_smash_boxes_register - {\wd\c_boxes_register\zeropoint - \ht\c_boxes_register\zeropoint - \dp\c_boxes_register\zeropoint} - -\unexpanded\def\hsmashbox - {\afterassignment\syst_boxes_hsmashed_boxes_register\c_boxes_register} - -\def\syst_boxes_hsmashed_boxes_register - {\wd\c_boxes_register\zeropoint} - -\unexpanded\def\vsmashbox - {\afterassignment\syst_boxes_vsmashed_boxes_register\c_boxes_register} - -\def\syst_boxes_vsmashed_boxes_register - {\ht\c_boxes_register\zeropoint - \dp\c_boxes_register\zeropoint} - -\unexpanded\def\smashedbox - {\afterassignment\syst_boxes_smashed_boxes_register\c_boxes_register} - -\unexpanded\def\syst_boxes_smashed_boxes_register - {\wd\c_boxes_register\zeropoint - \ht\c_boxes_register\zeropoint - \dp\c_boxes_register\zeropoint - \box\c_boxes_register} - -%D \macros -%D {hsmash,vsmash, -%D hsmashed,vsmashed} -%D -%D While the previous macros expected a \BOX, the next act on a -%D content. They are some subtle differences betreen the smash -%D and smashed alternatives. The later ones reduce all -%D dimensions to zero. - -\unexpanded\def\hsmash {\bgroup\dowithnextboxcs\syst_boxes_hsmashed_nextbox\hbox} -\unexpanded\def\vsmash {\bgroup\dowithnextboxcs\syst_boxes_vsmashed_nextbox\vbox} -\unexpanded\def\hsmashed{\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox \hbox} -\unexpanded\def\vsmashed{\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox \vbox} - -\unexpanded\def\syst_boxes_hsmashed_nextbox - {\wd\nextbox\zeropoint - \box\nextbox - \egroup} - -\unexpanded\def\syst_boxes_vsmashed_nextbox - {\ht\nextbox\zeropoint - \dp\nextbox\zeropoint - \box\nextbox - \egroup} - -\unexpanded\def\syst_boxes_smashed_nextbox - {\ht\nextbox\zeropoint - \dp\nextbox\zeropoint - \wd\nextbox\zeropoint - \box\nextbox - \egroup} - -%D \macros -%D {smashedhbox,smashedvbox} -%D -%D Also handy (all dimensions zeroed): -%D -%D \starttyping -%D \smashedhbox to ... {...} -%D \smashedvbox to ... {...} -%D \stoptyping - -\unexpanded\def\smashedhbox{\hbox\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox\hbox} -\unexpanded\def\smashedvbox{\vbox\bgroup\dowithnextboxcs\syst_boxes_smashed_nextbox\vbox} - -%D First we define a helper. We use a \LUATEX\ feature in order to avoid -%D mathpalettes. - -\newcount\c_boxes_math_style - -\unexpanded\def\syst_boxes_math_set_nextbox#1% - {\c_boxes_math_style\mathstyle - \setbox\nextbox\hbox{$\mathsurround\zeropoint\triggermathstyle\c_boxes_math_style{#1}$}} - -%D \macros -%D {smash} -%D -%D This smash alternative takes an optional arg [whdtb] as -%D well as is potentially catcode safer. It is needed by the -%D math module (although the \type {\leavevmode} is not added -%D here). - -\unexpanded\def\smash - {\begingroup - \futurelet\nexttoken\syst_boxes_smash} - -\def\syst_boxes_smash - {\ifx\nexttoken[% - \expandafter\syst_boxes_smash_yes - \else - \expandafter\syst_boxes_smash_nop - \fi} - -\def\syst_boxes_smash_nop - {\edef\m_boxes_smash_options{hd}% - \futurelet\nexttoken\syst_boxes_smash_indeed} - -\def\syst_boxes_smash_yes[#1]% - {\edef\m_boxes_smash_options{#1}% - \futurelet\nexttoken\syst_boxes_smash_indeed} - -\def\syst_boxes_smash_indeed - {\ifmmode - \expandafter\syst_boxes_smash_math - \else\ifx\nexttoken\bgroup - \doubleexpandafter\syst_boxes_smash_hbox - \else - \doubleexpandafter\syst_boxes_smash_text - \fi\fi} - -\def\syst_boxes_smash_math#1% - {\syst_boxes_math_set_nextbox{#1}% - \syst_boxes_smash_process} - -\def\syst_boxes_smash_hbox - {\dowithnextboxcs\syst_boxes_smash_process\hbox} - -\def\syst_boxes_smash_text#1% - {\setbox\nextbox\hbox{#1}% - \syst_boxes_smash_process} - -\def\syst_boxes_smash_process - {\expandafter\syst_boxes_smash_process_option\m_boxes_smash_options\relax - \box\nextbox - \endgroup} - -\installcorenamespace {smashoptions} - -\setvalue{\??smashoptions w}{\wd\nextbox\zeropoint} -\setvalue{\??smashoptions h}{\ht\nextbox\zeropoint} -\setvalue{\??smashoptions d}{\dp\nextbox\zeropoint} -\setvalue{\??smashoptions t}{\ht\nextbox\zeropoint} -\setvalue{\??smashoptions b}{\dp\nextbox\zeropoint} - -\def\syst_boxes_smash_process_option#1% - {\ifx#1\relax\else - \ifcsname\??smashoptions#1\endcsname\csname\??smashoptions#1\endcsname\fi - \expandafter\syst_boxes_smash_process_option - \fi} - -%D \starttabulate[|l|l|] -%D \NC w \NC \ruledhbox{\smash [w]{This is some great smashing, isn't it?}} \NC \NR -%D \NC h \NC \ruledhbox{\smash [h]{This is some great smashing, isn't it?}} \NC \NR -%D \NC d \NC \ruledhbox{\smash [d]{This is some great smashing, isn't it?}} \NC \NR -%D \NC tb \NC \ruledhbox{\smash [tb]{This is some great smashing, isn't it?}} \NC \NR -%D \NC whd \NC \ruledhbox{\smash[whd]{This is some great smashing, isn't it?}} \NC \NR -%D \stoptabulate - -%D \macros -%D {phantom, hphantom, vphantom, mathstrut} -%D -%D The next implementation of \type {\phantom} cum suis does -%D not grab an argument in the non||math case, which is better. -%D -%D Due to a complicated call to \type {\mathpallete} and -%D thereby \type {\mathchoice}, the next macro looks ugly. -%D We also take care of non||braced arguments. - -\unexpanded\def\phantom {\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed } -\unexpanded\def\vphantom{\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed_v} -\unexpanded\def\hphantom{\begingroup\futurelet\nexttoken\syst_boxes_phantom_indeed_h} - -\def\syst_boxes_phantom_math #1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make } -\def\syst_boxes_phantom_math_v#1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make_v} -\def\syst_boxes_phantom_math_h#1{\syst_boxes_math_set_nextbox{#1}\syst_boxes_phantom_make_h} - -\def\syst_boxes_phantom_hbox {\dowithnextboxcs\syst_boxes_phantom_make \hbox} % always hbox -\def\syst_boxes_phantom_hbox_v{\dowithnextboxcs\syst_boxes_phantom_make_v\hbox} % always hbox -\def\syst_boxes_phantom_hbox_h{\dowithnextboxcs\syst_boxes_phantom_make_h\hbox} % always hbox - -\def\syst_boxes_phantom_text #1{\setbox\nextbox\hbox{#1}\syst_boxes_phantom_make } % always hbox -\def\syst_boxes_phantom_text_v#1{\setbox\nextbox\hbox{#1}\syst_boxes_phantom_make_v} % always hbox -\def\syst_boxes_phantom_text_h#1{\setbox\nextbox\hbox{#1}\syst_boxes_phantom_make_h} % always hbox - -\def\syst_boxes_phantom_indeed - {\ifmmode - \expandafter\syst_boxes_phantom_math - \else\ifx\nexttoken\bgroup - \doubleexpandafter\syst_boxes_phantom_hbox - \else - \doubleexpandafter\syst_boxes_phantom_text - \fi\fi} - -\def\syst_boxes_phantom_indeed_v - {\ifmmode - \expandafter\syst_boxes_phantom_math_v - \else\ifx\nexttoken\bgroup - \doubleexpandafter\syst_boxes_phantom_hbox_v - \else - \doubleexpandafter\syst_boxes_phantom_text_v - \fi\fi} - -\def\syst_boxes_phantom_indeed_h - {\ifmmode - \expandafter\syst_boxes_phantom_math_h - \else\ifx\nexttoken\bgroup - \doubleexpandafter\syst_boxes_phantom_hbox_h - \else - \doubleexpandafter\syst_boxes_phantom_text_h - \fi\fi} - -\def\syst_boxes_phantom_make - {\setbox\scratchbox\emptyhbox - \ht\scratchbox\ht\nextbox - \dp\scratchbox\dp\nextbox - \wd\scratchbox\wd\nextbox - \box\scratchbox - \endgroup} - -\def\syst_boxes_phantom_make_v - {\setbox\scratchbox\emptyhbox - \ht\scratchbox\ht\nextbox - \dp\scratchbox\dp\nextbox - \box\scratchbox - \endgroup} - -\def\syst_boxes_phantom_make_h - {\setbox\scratchbox\emptyhbox - \wd\scratchbox\wd\nextbox - \box\scratchbox - \endgroup} - -%D We also define plain's \type {\mathstrut}. - -\unexpanded\def\mathstrut{\vphantom(} % can be made faster by inlining - -%D \macros -%D {getboxheight} -%D -%D Although often needed, \TEX\ does not support arithmics -%D like: -%D -%D \starttyping -%D \dimen0 = \ht0 + \dp0 -%D \stoptyping -%D -%D so we implemented: -%D -%D \starttyping -%D \getboxheight ... \of \box... -%D \stoptyping -%D -%D For instance, -%D -%D \starttyping -%D \getboxheight \dimen0 \of \box0 -%D \getboxheight \someheight \of \box \tempbox -%D \stoptyping -%D -%D The implementation is rather stupid: -%D -%D \starttyping -%D \def\getboxheight#1\of#2\box#3% -%D {#1\ht#3\advance#1\dp#3\relax} -%D \stoptyping -%D -%D The next alternative is slightly more clever, since -%D it accepts \type {{12}} as well as \type {12} as box -%D number. - -\unexpanded\def\getboxheight#1\of#2\box#3% - {\def\next{#1\dimexpr\ht\c_boxes_register+\dp\c_boxes_register\relax}% - \afterassignment\next\c_boxes_register=#3} - -%D For a long time the following three macros were part of -%D the grid snapping core module, but it makes more sense to -%D have them here so that users can see them. -%D -%D \macros -%D {getnoflines, getroundednoflines, getrawnoflines} -%D -%D Het commando \type{\getnoflines} converteert een hoogte -%D (dimensie) in een aantal regels en kent dit toe aan -%D \type{\noflines}. -%D -%D \starttyping -%D \getnoflines{dimensie} -%D \stoptyping -%D -%D Er wordt gedeeld door \type{\openlineheight} en een hoogte -%D van~0pt komt overeen met 0~regels. The raw alternative -%D does not round. - -%D For a long time we had: -%D -%D \starttyping -%D \newcount\noflines -%D \newdimen\noflinesheight -%D -%D \def\dogetnoflines#1#2% -%D {\noflinesheight#2\relax -%D \ifzeropt\noflinesheight % \ifdim\noflinesheight=\zeropoint -%D \noflines\zerocount -%D \else -%D \divide\noflinesheight \openlineheight -%D \noflines\noflinesheight -%D #1\ifdim\noflines\openlineheight=#2\relax \else -%D \advance\noflines\ifdim#2>\zeropoint\plusone\else\minusone\fi -%D \fi\fi -%D \fi} -%D -%D \def\getnoflines {\dogetnoflines\iftrue } % compensated -%D \def\getrawnoflines{\dogetnoflines\iffalse} % no compensation -%D \stoptyping -%D -%D A more recent variant is: - -\ifx\roundingeps\undefined \newdimen\roundingeps \roundingeps=10sp \fi - -\newcount\noflines -\newdimen\noflinesheight - -\unexpanded\def\getnoflines#1% - {\noflinesheight#1\relax - \ifzeropt\noflinesheight - \noflines\zerocount - \else\ifdim\noflinesheight>\zeropoint - \advance\noflinesheight-\roundingeps - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \advance\noflines\plusone - \else - \advance\noflinesheight\roundingeps - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \advance\noflines\minusone - \fi\fi} - -\unexpanded\def\getroundednoflines#1% - {\noflinesheight#1\relax - \ifzeropt\noflinesheight - \noflines\zerocount - \else\ifdim\noflinesheight>\zeropoint - \advance\noflinesheight\roundingeps - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \else - \advance\noflinesheight-\roundingeps - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \fi\fi} - -\unexpanded\def\getrawnoflines#1% - {\noflinesheight#1\relax - \ifzeropt\noflinesheight - \noflines\zerocount - \else\ifdim\noflinesheight>\zeropoint - \advance\noflinesheight\roundingeps - \advance\noflinesheight.5\openlineheight - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \else - \advance\noflinesheight-\roundingeps - \advance\noflinesheight-.5\openlineheight - \divide\noflinesheight\openlineheight - \noflines\noflinesheight - \fi\fi} - -%D Let's proof that it works: -%D -%D \startbuffer -%D \scratchdimen\dimexpr(3pt) \getnoflines\scratchdimen 1=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight) \getnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.1\lineheight) \getnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.5\lineheight) \getnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.9\lineheight) \getnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight+3pt) \getnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight+3sp) \getnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight-3sp) \getnoflines\scratchdimen 10=\the\noflines \endgraf -%D -%D \scratchdimen\dimexpr(3pt) \getrawnoflines\scratchdimen 0=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight) \getrawnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.1\lineheight) \getrawnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.5\lineheight) \getrawnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10.9\lineheight) \getrawnoflines\scratchdimen 11=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight+3pt) \getrawnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight+3sp) \getrawnoflines\scratchdimen 10=\the\noflines \endgraf -%D \scratchdimen\dimexpr(10\lineheight-3sp) \getrawnoflines\scratchdimen 10=\the\noflines \endgraf -%D \stopbuffer -%D -%D \typebuffer \getbuffer - -%D \macros -%D {determinenoflines} -%D -%D The next macro determines the number of lines and -%D returns it it \type {\noflines}. The macro works -%D reasonable well as long as the content can be unboxed. -%D -%D \starttyping -%D \determinenoflines{test\\test} -%D \determinenoflines{\bfd test\\test} -%D \determinenoflines{\definedfont[Sans at 40pt]test\\test} -%D \stoptyping - -\def\dodeterminenoflines % can be mkiv'd - {\beginofshapebox - \unvbox\nextbox - \endofshapebox - % \global\count1\zerocount - % \reshapebox{\global\advance\count1\plusone}% - % \egroup\noflines\count1 }% - \scratchcounter\zerocount - \reshapebox{\global\advance\scratchcounter\plusone}% - \expandafter\egroup\expandafter\noflines\the\scratchcounter\relax} - -\unexpanded\def\determinenoflines - {\bgroup - \forgetall - \let\crlf\endgraf - \let\\\endgraf - \dowithnextboxcs\dodeterminenoflines\vbox} - -%D \macros -%D {doiftextelse, doiftext} -%D -%D When \type {\doifelse} cum suis hopelessly fail, for -%D instance because we pass data, we can fall back on the next -%D macro: -%D -%D \starttyping -%D \doiftextelse {data} {then branch} {else branch} -%D \doiftext {data} {then branch} -%D \stoptyping - -\unexpanded\def\doifelsetext#1% - {\begingroup - \setbox\scratchbox\hbox - {\settrialtypesetting - \ignorespaces#1\removeunwantedspaces}% - \ifzeropt\wd\scratchbox - \endgroup\expandafter\secondoftwoarguments - \else - \endgroup\expandafter\firstoftwoarguments - \fi} - -\let\doiftextelse\doifelsetext - -\unexpanded\def\doiftext#1% - {\begingroup - \setbox\scratchbox\hbox - {\settrialtypesetting - \ignorespaces#1\removeunwantedspaces}% - \ifzeropt\wd\scratchbox - \endgroup\expandafter\gobbleoneargument - \else - \endgroup\expandafter\firstofoneargument - \fi} - -%D \macros -%D {dowithnextbox,nextbox} -%D -%D Sometimes we want a macro to grab a box and do something -%D on the content. One could pass an argument to a box, but -%D this can violate the specific \CATCODES\ of its content and -%D leads to unexpected results. The next macro treats the -%D following braced text as the content of a box and -%D manipulates it afterwards in a predefined way. -%D -%D The first argument specifies what to do with the content. -%D This content is available in \type{\nextbox}. The second -%D argument is one of \type{\hbox}, \type{\vbox} or -%D \type{\vtop}. The third argument must be grouped with -%D \type{\bgroup} and \type{\egroup}, \type{{...}} or can be -%D a \type{\box} specification. -%D -%D In \CONTEXT\ this macro is used for picking up a box and -%D treating it according to earlier specifications. We use for -%D instance something like: -%D -%D \starttyping -%D \def\getfloat% -%D {\def\handlefloat{...\box\nextbox...} -%D \dowithnextboxcs\handlefloat\vbox} -%D \stoptyping -%D -%D instead of: -%D -%D \starttyping -%D \def\getfloat#1% -%D {...#1...} -%D \stoptyping -%D -%D In this implementation the \type{\aftergroup} construction -%D is needed because \type{\afterassignment} is executed inside -%D the box. - -\unexpanded\def\dowithnextbox#1% - {\def\syst_boxes_with_next_box{#1}% - \afterassignment\syst_boxes_with_next_box_indeed - \setbox\nextbox} - -\def\syst_boxes_with_next_box_indeed - {\aftergroup\syst_boxes_with_next_box} - -\unexpanded\def\dowithnextboxcs#1% - {\let\syst_boxes_with_next_box#1% - \afterassignment\syst_boxes_with_next_box_indeed - \setbox\nextbox} - -%D So in fact we get: -%D -%D \starttyping -%D \setbox\nextbox { \aftergroup\syst_boxes_with_next_box ... } -%D \stoptyping -%D -%D or -%D -%D \starttyping -%D \setbox\nextbox { ... } \syst_boxes_with_next_box -%D \stoptyping -%D -%D A slower but more versatile implementation is: -%D -%D \starttyping -%D \unexpanded\def\dowithnextbox#1#2% -%D {\def\syst_boxes_with_next_box{#1}% -%D \ifx#2\hbox -%D \afterassignment\syst_boxes_with_next_box_indeed -%D \else\ifx#2\vbox -%D \afterassignment\syst_boxes_with_next_box_indeed -%D \else\ifx#2\normalvtop -%D \afterassignment\syst_boxes_with_next_box_indeed -%D \else\ifx#2\normalvcenter -%D \afterassignment\syst_boxes_with_next_box_indeed -%D \else -%D \afterassignment\syst_boxes_with_next_box -%D \fi\fi\fi\fi -%D \setbox\nextbox#2} -%D \stoptyping -%D -%D This alternative also accepts \type{\box0} and alike, but -%D we don't really need this functionality now. - -%D \macros -%D {nextboxht,nextboxwd,nextboxdp,flushnextbox} -%D -%D The next couple of shortcuts saves us memory as well as -%D \type {{}}'s in passing parameters. - -\def\nextboxht {\ht\nextbox} -\def\nextboxwd {\wd\nextbox} -\def\nextboxdp {\dp\nextbox} -\def\nextboxhtdp {\dimexpr\ht\nextbox+\dp\nextbox\relax} - -\unexpanded\def\flushnextbox{\box\nextbox} - -%D \macros -%D {dowithnextboxcontent} -%D -%D But, occasionally we do need to pass some local settings -%D without wanting to use additional grouping. Therefore we -%D provide: -%D -%D \starttyping -%D \dowithnextboxcontent{inside}{after}{box content} -%D \stoptyping -%D -%D {\em todo: Search source for potential usage!} - -\unexpanded\def\dowithnextboxcontent#1#2% inside, after - {\def\syst_boxes_with_next_box_one{#2}% - \def\syst_boxes_with_next_box_two{#1}% - \afterassignment\syst_boxes_with_next_box_content_indeed - \setbox\nextbox} - -\unexpanded\def\dowithnextboxcontentcs#1#2% inside, after - {\let\syst_boxes_with_next_box_one#2% - \let\syst_boxes_with_next_box_two#1% - \afterassignment\syst_boxes_with_next_box_content_indeed - \setbox\nextbox} - -\def\syst_boxes_with_next_box_content_indeed - {\syst_boxes_with_next_box_two\aftergroup\syst_boxes_with_next_box_one} - -%D \macros -%D {llap, rlap, tlap, blap, clap} -%D -%D Some well known friends, but we implement them our own -%D way. We want the macros to work in both math and text mode. - -\def\dodorlap{\hbox to \zeropoint{\box\nextbox\normalhss}\endgroup} -\def\dodollap{\hbox to \zeropoint{\normalhss\box\nextbox}\endgroup} -\def\dodoclap{\hbox to \zeropoint{\normalhss\box\nextbox\normalhss}\endgroup} - -\def\dorlap{\begingroup\dowithnextboxcs\dodorlap\hbox} -\def\dollap{\begingroup\dowithnextboxcs\dodollap\hbox} -\def\doclap{\begingroup\dowithnextboxcs\dodoclap\hbox} - -\def\domathclap{\mathpalette\dodomathclap} \def\dodomathclap#1#2{\doclap{$\mathsurround\zeropoint#1#2$}} -\def\domathllap{\mathpalette\dodomathllap} \def\dodomathllap#1#2{\dollap{$\mathsurround\zeropoint#1#2$}} -\def\domathrlap{\mathpalette\dodomathrlap} \def\dodomathrlap#1#2{\dorlap{$\mathsurround\zeropoint#1#2$}} - -\unexpanded\def\rlap{\mathortext\domathrlap\dorlap} -\unexpanded\def\llap{\mathortext\domathllap\dollap} -\unexpanded\def\clap{\mathortext\domathclap\doclap} - -\def\dodotlap{\vbox to \zeropoint{\normalvss\box\nextbox}\endgroup} -\def\dodoblap{\vbox to \zeropoint{\box\nextbox\normalvss}\endgroup} - -\unexpanded\def\tlap{\begingroup\dowithnextboxcs\dodotlap\vbox} -\unexpanded\def\blap{\begingroup\dowithnextboxcs\dodoblap\vbox} - -%D \macros -%D {beginofshapebox, -%D reshapebox, doreshapebox, -%D flushshapebox, -%D innerflushshapebox, -%D shapebox, -%D ifreshapingbox} -%D -%D The next utility macro originates from some linenumbering -%D mechanism. Due to \TEX's advanced way of typesetting -%D paragraphs, it's not easy to do things on a line||by||line -%D basis. This macro is able to reprocess a given box and can -%D act upon its vertical boxed components, such as lines. The -%D unwinding sequence in this macro is inspired by a \NTG\ -%D workshop of David Salomon in June 1992. -%D -%D First we have to grab the piece of text we want to act -%D upon. This is done by means of the duo macros: -%D -%D \starttyping -%D \beginofshapebox -%D a piece of text -%D \endofshapebox -%D \stoptyping -%D -%D When all texts is collected, we can call \type{\reshapebox} -%D and do something with it's vertical components. We can make -%D as much passes as needed. When we're done, the box can be -%D unloaded with \type{\flushshapebox}. The only condition in -%D this scheme is that \type{\reshapebox} must somehow unload -%D the \BOX\ \type{\shapebox}. -%D -%D An important aspect is that the content is unrolled -%D bottom||up. The next example illustrates this maybe -%D unexpected characteristic. -%D -%D \startbuffer -%D \beginofshapebox -%D \em \input tufte -%D \endofshapebox -%D -%D \newcounter\LineNumber -%D -%D \reshapebox -%D {\doglobal\increment\LineNumber -%D \hbox{\llap{\LineNumber\hskip2em}\box\shapebox}} -%D -%D \flushshapebox -%D \stopbuffer -%D -%D \typebuffer -%D -%D \getbuffer -%D -%D As we can see, when some kind of numbering is done, we have -%D to add a second pass. -%D -%D \startbuffer -%D \newcounter\LineNumber -%D \newcounter\NumberOfLines -%D -%D \reshapebox -%D {\doglobal\increment\NumberOfLines -%D \box\shapebox} -%D -%D \reshapebox -%D {\doglobal\increment\LineNumber -%D \hbox -%D {\llap{\LineNumber\ (\NumberOfLines)\hskip2em}% -%D \box\shapebox}% -%D \doglobal\decrement\NumberOfLines} -%D -%D \flushshapebox -%D \stopbuffer -%D -%D \typebuffer -%D -%D \getbuffer -%D -%D This example shows that the content of the box is still -%D available after flushing. Another feature is that only the -%D last reshaping counts. Multiple reshaping can be done by: -%D -%D \startbuffer -%D \beginofshapebox -%D \flushshapebox -%D \endofshapebox -%D -%D \reshapebox -%D {\doglobal\increment\LineNumber -%D \hbox{\llap{$\star$\hskip1em}\box\shapebox}% -%D \doglobal\decrement\NumberOfLines} -%D -%D \flushshapebox -%D \stopbuffer -%D -%D \typebuffer -%D -%D \getbuffer -%D -%D The macros are surprisingly easy to follow and in fact -%D introduce no new concepts. Nearly all books on \TEX\ show -%D similar solutions for unwinding \BOXES. -%D -%D Some macros, like footnote ones, can be sensitive for -%D reshaping, which can result in an endless loop. We -%D therefore offer: -%D -%D \starttyping -%D \ifreshapingbox -%D \stoptyping -%D -%D Some \CONTEXT\ commands are protected this way. Anyhow, -%D reshaping is aborted after 100 dead cycles. -%D -%D By the way, changing the height and depth of \BOX\ -%D \type{\shapebox} results in bad spacing. This means that -%D for instance linenumbers etc. should be given zero height -%D and depth before being lapped into the margin. The -%D previous examples ignore this side effect, but beware! - -\newif \ifsomeshapeleft -\newif \ifreshapingbox - -\newbox \shapebox -\newcount \shapepenalty -\newdimen \shapekern -\newskip \shapeskip - -\newbox \newshapebox -\newbox \oldshapebox - -\newcount \shapecounter - -\newevery \everyshapebox \relax - -\def\shapesignal{.12345678pt} % or 12345sp - -\unexpanded\def\reshapebox#1% - {\doreshapebox - {#1}% - {\penalty\shapepenalty}% - {\kern \shapekern }% - {\vskip \shapeskip }} - -\newbox\tmpshapebox - -\newif\ifreshapingfailed % may save redundant runs - -\def\doreshapebox#1#2#3#4% \shapebox, \shapepenalty, \shapekern, \shapeskip - {\global\reshapingfailedfalse - \ifzeropt\ht\oldshapebox % \ifdim\ht\oldshapebox=\zeropoint - \setbox\newshapebox\emptyvbox - \else - \setbox\newshapebox\vbox - {\unvcopy\oldshapebox - \setbox\newshapebox\emptybox - \shapecounter\zerocount - \doloop{\dodoreshapebox{#1}{#2}{#3}{#4}}}% - \setbox\newshapebox\box\tmpshapebox - \fi} - -\ifx\originalshapebox\undefined \let\originalshapebox\oldshapebox \fi - -% We will turn this into a \MKIV\ variant. - -\unexpanded\def\insertshapesignal - {\hbox to \shapesignal{\strut\hss}% plus \strut - \prevdepth\strutdp} % never \nointerlineskip - -\unexpanded\def\restoreshapebox % compensates for the signal - {\global\setbox\tmpshapebox\vbox{\vskip-\lineheight\unvcopy\oldshapebox}} - -\def\dodoreshapebox#1#2#3#4% \shapebox, \shapepenalty, \shapekern, \shapeskip - {\ifnum\lastnodetype=\gluenodecode - \shapeskip\lastskip - \global\setbox\tmpshapebox\vbox{#4\unvbox\tmpshapebox}% - \unskip - \else\ifnum\lastnodetype=\kernnodecode - \shapekern\lastkern - \global\setbox\tmpshapebox\vbox{#3\unvbox\tmpshapebox}% - \unkern - \else\ifnum\lastnodetype=\penaltynodecode - \shapepenalty\lastpenalty - \global\setbox\tmpshapebox\vbox{#2\unvbox\tmpshapebox}% - \unpenalty - \else\ifnum\lastnodetype<\zeropoint - \exitloop - \else - \setbox\shapebox\lastbox - \ifvoid\shapebox - \else\ifdim\wd\shapebox=\shapesignal\relax - \exitloop - \else - \shapecounter\zerocount - \global\setbox\tmpshapebox\vbox{#1\unvbox\tmpshapebox}% - \fi\fi - \fi\fi\fi\fi - \ifnum\shapecounter>100 % can be less - \global\reshapingfailedtrue - \message{!!forced exit from shapebox \the\lastnodetype !!}% - \restoreshapebox - \exitloop - \else - \advance\shapecounter \plusone - \fi} - -\unexpanded\def\beginofshapebox - {\setbox\oldshapebox\vbox - \bgroup - \reshapingboxtrue - \the\everyshapebox - \insertshapesignal} - -\unexpanded\def\endofshapebox - {\endgraf - \egroup} - -\let\beginshapebox\beginofshapebox -\let\endshapebox \endofshapebox - -\unexpanded\def\flushshapebox - {\bgroup - \ifzeropt\ht\newshapebox % \ifdim\ht\newshapebox=\zeropoint - \else - % make \prevdepth legal - % \par before the next \vskip gives far worse results - \ifdim\parskip>\zeropoint\vskip\parskip\else\par\fi - % and take a look - \ifdim\prevdepth=-\thousandpoint - \prevdepth\zeropoint - \fi - \ifdim\prevdepth<\zeropoint\relax - % something like a line or a signal or ... - \donetrue - \else\ifinner - % not watertight and not ok - \donefalse - \else\ifdim\pagegoal=\maxdimen - \donetrue - \else - % give the previous line a normal depth - \donetrue - {\forgeteverypar\verticalstrut}\nobreak - \kern-\struttotal % geen \vskip - \kern-\parskip - % \vskip-\strutdp - \fi\fi\fi - \scratchdimen\dp\newshapebox - \unvbox\newshapebox - % \prevdepth=0pt and \dp\newshapebox depend on last line - \kern-\scratchdimen % ?? - % now \prevdepth=0pt - \ifdone - \kern\strutdp - \prevdepth\strutdp - \fi - \fi - \egroup} - -%D In real inner situations we can use: -%D -%D \starttyping -%D \flushinnershapebox -%D \stoptyping -%D -%D This one is used in \type{\framed}. - -% The kern fails on for instance: -% -% \omlijnd[offset=0pt,hoogte=8mm,uitlijnen={rechts,laho}]{\bfa test} - -\unexpanded\def\innerflushshapebox - {\ifzeropt\ht\newshapebox \else - \unvcopy\newshapebox\relax % unvcopy ! else spacing problem - % \kern-\dp\newshapebox\relax - \fi} - -%D For absolute control, one can use \type{\doreshapebox} -%D directly. This macro takes four arguments, that take care -%D of: -%D -%D \startitemize[n,packed] -%D \item \type{\shapebox} -%D \item \type{\shapepenalty} -%D \item \type{\shapekern} -%D \item \type{\shapeskip} -%D \stopitemize - -%D \macros -%D {shapedhbox} -%D -%D When constructing a new box, using the content of \type -%D {\shapebox}, one can best use \type {\shapedhbox} instead -%D of \type {\hbox}, since it manages the height and depth of -%D the line. - -\unexpanded\def\shapedhbox % lines with non strutted dimensions have - {\expanded{\dowithnextbox % interlineskip so if we want the original - {\dp\nextbox\the\ht\shapebox % spacing, we need to preserve the original - \dp\nextbox\the\dp\shapebox % height and depth which is definitely - \box\nextbox}} % needed if we apply struts to the 'new' - \hbox} % box or do something that changed ist size - -%D \macros -%D {hyphenatedword, -%D hyphenatedpar, -%D hyphenatedfile, -%D dohyphenateword} -%D -%D We no longer use the pure \TEX\ variant. In due time we will -%D report some more advanced statistics. -%D -%D \starttyping -%D \showhyphens{dohyphenatedword} -%D \stoptyping - -\unexpanded\def\doshowhyphenatednextbox - {\clf_showhyphenatedinlist\nextbox} - -\unexpanded\def\showhyphens - {\dowithnextboxcs\doshowhyphenatednextbox\hbox} - -%D The following macros are seldom used but handy for tracing. -%D -%D \starttyping -%D \hyphenatedword{dohyphenatedword} -%D \hyphenatedpar {\dorecurse{10}{dohyphenatedword }} -%D \hyphenatedfile{tufte} -%D \stoptyping - -\unexpanded\def\dohyphenatednextbox - {\clf_hyphenatedlist\nextbox false\relax - \unhbox\nextbox} - -\unexpanded\def\hyphenatedword {\dowithnextboxcs\dohyphenatednextbox\hbox} -\unexpanded\def\hyphenatedpar {\dowithnextboxcs\dohyphenatednextbox\hbox} -\unexpanded\def\hyphenatedfile#1{\dowithnextboxcs\dohyphenatednextbox\hbox{\readfile{#1}\donothing\donothing}} - -\unexpanded\def\dohyphenatednextboxcolor - {\clf_hyphenatedlist\nextbox true\relax - \unhbox\nextbox} - -\unexpanded\def\hyphenatedcoloredword{\dowithnextboxcs\dohyphenatednextboxcolor\hbox} - -%D \macros -%D {processtokens} -%D -%D We fully agree with (most) typographers that inter||letter -%D spacing is only permitted in fancy titles, we provide a -%D macro that can be used to do so. Because this is -%D (definitely and fortunately) no feature of \TEX, we have to -%D step through the token list ourselves. -%D -%D \starttyping -%D \processtokens {before} {between} {after} {space} {tokens} -%D \stoptyping -%D -%D An example of a call is: -%D -%D \startbuffer -%D \processtokens {[} {+} {]} {\space} {hello world} -%D \stopbuffer -%D -%D \typebuffer -%D -%D This results in: -%D -%D \getbuffer -%D -%D The list of tokens may contain spaces, while \type{\\}, -%D \type{{}} and \type{\ } are handled as space too. - -\unexpanded\def\processtokens#1#2#3#4#5% - {\begingroup - \def\lastcharacter{\lastcharacter}% - \def\space{ }% - \let\\=\space - \def\before {#1}% - \def\between{#2}% - \def\after {#3}% - \def\white {#4}% - \let\savedbefore\before - \doprocesstokens#5\lastcharacter - \endgroup} - -\def\doprocesstokens% the space after = is essential - {\afterassignment\dodoprocesstokens\let\nextprocessedtoken= } - -\def\dodoprocesstokens - {\ifx\nextprocessedtoken\lastcharacter - \after - \let\nextprocessedtoken\relax - \else\ifx\nextprocessedtoken\bgroup - \def\nextprocessedtoken - {\dowithnextbox - {\before{\copy\nextbox}% \before can use nextbox several times - \let\before\between - \doprocesstokens} - \hbox\bgroup}% - \else - \expandafter\if\space\nextprocessedtoken - \after\white - \let\before\savedbefore - \else - \before\nextprocessedtoken - \let\before\between - \fi - \let\nextprocessedtoken\doprocesstokens - \fi\fi - \nextprocessedtoken} - -%D \macros -%D {doboundtext} -%D -%D Sometimes there is not enough room to show the complete -%D (line of) text. In such a situation we can strip of some -%D characters by using \type{\doboundtext}. When the text is -%D wider than the given width, it's split and the third -%D argument is appended. When the text to be checked is packed -%D in a command, we'll have to use \type{\expandafter}. -%D -%D \starttyping -%D \doboundtext{a very, probably to long, text}{3cm}{...} -%D \stoptyping -%D -%D When calculating the room needed, we take the width of the -%D third argument into account, which leads to a bit more -%D complex macro than needed at first sight. - -\def\dodoboundtext#1% - {\setbox0\hbox{#1}% - \advance\scratchdimen -\wd0 - \ifdim\scratchdimen>\zeropoint\relax#1\fi}% - -\def\doboundtext#1#2#3% still used? - {\hbox - {\setbox\scratchbox\hbox{#1}% - \scratchdimen#2\relax - \ifdim\wd\scratchbox>\scratchdimen - \setbox\scratchbox\hbox{#3}% - \advance\scratchdimen -\wd\scratchbox - \handletokens#1\with\dodoboundtext - \fi - \box\scratchbox}} - -%D \macros -%D {limitatetext} -%D -%D A bit more beautiful alternative for the previous command is -%D the next one. This command is more robust because we let -%D \TEX\ do most of the job. The previous command works better -%D on text that cannot be hyphenated. -%D -%D \starttyping -%D \limitatetext {text} {width} {sentinel} -%D \limitatetext {text} {-width} {prelude} -%D \stoptyping -%D -%D When no width is given, the whole text comes available. The -%D sentinel is optional. This is about the third version. - -\ifdefined\fakecompoundhyphen\else \let\fakecompoundhyphen\relax \fi -\ifdefined\veryraggedright \else \def\veryraggedright{\raggedright} \fi - -\unexpanded\def\limitatetext - {\bgroup % evt \setstrut - \forgetall % otherwise indentation and so - \let\limitatetext\firstofthreearguments - \fakecompoundhyphen % dangerous ! ! ! ! ! ! ! ! ! - \dowithnextboxcs\syst_boxes_limitate_text\hbox} - -\def\syst_boxes_limitate_text#1% #2 - {\doifelsenothing{#1}\syst_boxes_limitate_text_nop\syst_boxes_limitate_text_yes{#1}} % {#2} - -\def\syst_boxes_limitate_text_nop#1#2% - {\unhbox\nextbox - \egroup} - -\def\syst_boxes_limitate_text_yes#1#2% - {\nopenalties - \scratchdimen#1\relax - \ifdim\scratchdimen<\zeropoint\relax % we'll take the last line - \donefalse - \scratchdimen-\scratchdimen - \else - \donetrue - \fi - \ifdim\wd\nextbox>\scratchdimen - \setbox\scratchbox\hbox{\ifdone\space#2\else#2\space\fi}% - \advance\scratchdimen -\wd\scratchbox - \setbox0\box\nextbox - \setbox\nextbox\vbox - {\hsize\scratchdimen - \hfuzz\maxdimen - \veryraggedright - \strut - \ifdone \else - \parfillskip\zeropoint - \rightskip\zeropoint - \hskip\zeropoint \s!plus 1\s!fill % \hsize - \fi - \unhcopy0}% - \ifdim\ht\nextbox>\strutht - \setbox\nextbox\vbox % if omitted: missing brace reported - {\splittopskip\openstrutheight - \ifdone - \setbox\nextbox\vsplit\nextbox to \strutht - \else - \doloop - {\setbox0\vsplit\nextbox to \strutht - \ifdim\ht\nextbox>\strutht \else \exitloop \fi}% - \fi - \unvbox\nextbox - \setbox\nextbox\lastbox - \global\setbox1\hbox - {\ifdone - \unhbox\nextbox\unskip\kern\zeropoint\box\scratchbox - \else - \box\scratchbox\unhbox\nextbox - \fi - \unskip}}% - \unhbox1 - \else - \unhbox0 - \fi - \else - \unhbox\nextbox - \fi - \egroup} - -%D We can also limit a text with more control: -%D -%D \startbuffer -%D \limitatetext {\input tufte } {2cm,5mm} {\unknown} -%D \limitatetext {ton en hans} {2cm,5mm} {\unknown} -%D \limitatetext {ton en hans zijn eikels} {2cm,5mm} {\unknown} -%D \limitatetext {ton} {2cm,5mm} {\unknown} -%D \stopbuffer -%D -%D \typebuffer \getbuffer -%D -%D We build this feature on top of the previous macro. - -% we could move the text argument to the end - -\let\normallimitatetext\limitatetext - -\def\speciallimitatetext#1#2#3#4% text left right placeholder - {%\dontleavehmode - \bgroup - \let\speciallimitatetext\firstoffourarguments - \setbox0\hbox - {\nohyphens - \normallimitatetext{#1}{+#2}{}#4% - \normallimitatetext{#1}{-#3}{}}% - \setbox2\hbox - {#1}% - \ifdim\wd2<\wd0 #1\else\unhbox0\fi - \egroup} - -\unexpanded\def\limitatetext#1#2#3% \expanded added 2003/01/16 - {\expanded{\beforesplitstring#2}\at,\to\leftlimit - \expanded{\aftersplitstring #2}\at,\to\rightlimit - \ifx\rightlimit\empty - \normallimitatetext {#1}\leftlimit {#3}% - \else - \speciallimitatetext{#1}\leftlimit\rightlimit{#3}% - \fi} - -%D Undocumented bonus (see wiki): -%D -%D \starttyping -%D \limitatefirstline{\input tufte\relax}{10cm}{\unknown} -%D \stoptyping - -\unexpanded\def\limitatefirstline#1#2#3% - {\hbox\bgroup\strut - \setbox\scratchbox\hbox{\begstrut#1\endstrut}% - \ifdim\wd\scratchbox>#2\relax - \setbox\scratchbox\hbox{#3}% - \hsize#2\relax - \advance\hsize-\wd\scratchbox - \setbox\scratchbox\vbox{\forgetall\veryraggedright#1}% - \setbox\scratchbox\vsplit\scratchbox to \lineheight - \vbox - {\unvbox\scratchbox - \global\setbox\plusone\lastbox - \global\setbox\plusone\hbox{\strut\unhbox\plusone}% - \hbox % to #2 - {\ifx\clip\undefined - \box\plusone - \else\ifdim\wd\plusone>\hsize - \lower\strutdepth\hbox{\clip[\c!width=\hsize,\c!height=\lineheight]{\hbox{\raise\strutdepth\box\plusone}}}% - \else - \box\plusone - \fi\fi - \removeunwantedspaces#3}}% \removeunwantedspaces\hss#3}}% - \else - #1% - \fi - \egroup} - -%D \macros -%D {processisolatedwords,processisolatedchars} -%D -%D \startbuffer -%D \processisolatedchars{some more words} \ruledhbox \par -%D \processisolatedchars{and some $x + y = z$ math} \ruledhbox \par -%D \processisolatedchars{and a \hbox{$x + y = z$}} \ruledhbox \par -%D \processisolatedwords{some more words} \ruledhbox \par -%D \processisolatedwords{and some $x + y = z$ math} \ruledhbox \par -%D \processisolatedwords{and a \hbox{$x + y = z$}} \ruledhbox \par -%D \stopbuffer -%D -%D \typebuffer \blank \getbuffer \blank - -% todo: provide variant with #1 picked up as box - -\unexpanded\def\processisolatedchars#1#2% - {\dontleavehmode - \begingroup - \setbox\scratchbox\hbox{\settrialtypesetting#2{\savecurrentattributes{pic}}}% - \setbox\scratchbox\hbox{\restorecurrentattributes{pic}#1}% - \clf_applytobox - method {char}% - box \scratchbox - command {\checkedstrippedcsname#2}% - nested true% - \relax - \endgroup} - -\unexpanded\def\processisolatedwords#1#2% - {\dontleavehmode - \begingroup - \setbox\scratchbox\hbox{\settrialtypesetting#2{\savecurrentattributes{pic}}}% - \setbox\scratchbox\hbox{\restorecurrentattributes{pic}#1}% - \clf_applytobox - method {word}% - box \scratchbox - command {\checkedstrippedcsname#2}% - nested true% - \relax - \endgroup} - -%D A variant: - -\unexpanded\def\applytocharacters#1% - {\dontleavehmode - \dowithnextbox{\clf_applytobox - method {char}% - box \nextbox - command {\checkedstrippedcsname#1}% - nested true% - \relax}% - \hbox} - -\unexpanded\def\applytowords#1% - {\dontleavehmode - \dowithnextbox{\clf_applytobox - method {word}% - box \nextbox - command {\checkedstrippedcsname#1}% - nested true% - \relax}% - \hbox} - -%D The old call: - -\unexpanded\def\processwords#1% - {\processisolatedwords{#1}\processword} - -\let\processword\relax - -\unexpanded\def\applytosplitstringchar#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {char}% - \relax} - -\unexpanded\def\applytosplitstringword#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {word}% - \relax} - -\unexpanded\def\applytosplitstringline#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {line}% - \relax} - -\unexpanded\def\applytosplitstringcharspaced#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {char}% - spaced true% - \relax} - -\unexpanded\def\applytosplitstringwordspaced#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {word}% - spaced true% - \relax} - -\unexpanded\def\applytosplitstringlinespaced#1#2% - {\dontleavehmode\clf_processsplit - data {#2}% - command {\checkedstrippedcsname#1}% - method {line}% - spaced true% - \relax} - -%D \macros -%D {sbox} -%D -%D This is a rather strange command. It grabs some box content -%D and and limits the size to the height and depth of a -%D \type{\strut}. The resulting bottom||alligned box can be used -%D aside other ones, without disturbing the normal baseline -%D distance. -%D -%D \startbuffer -%D \ruledhbox to .5\hsize{\sbox{eerste\par tweede \par derde}} -%D \stopbuffer -%D -%D \typebuffer -%D -%D Shows up as: -%D -%D \startexample -%D \vskip3\baselineskip -%D \getbuffer -%D \stopexample -%D -%D Before displaying the result we added some skip, otherwise -%D the first two lines would have ended up in the text. This -%D macro can be useful when building complicated menus, headers -%D and footers and|/|or margin material. - -\unexpanded\def\sbox - {\vbox\bgroup - \dowithnextboxcs\syst_boxes_sbox_finish\vbox} - -\unexpanded\def\syst_boxes_sbox_finish - {\setbox\nextbox\hbox - {\strut - \dp\nextbox\zeropoint - \lower\strutdp\box\nextbox}% - \dp\nextbox\strutdp - \ht\nextbox\strutht - \box\nextbox - \egroup} - -%D A variant on this: - -\unexpanded\def\inlinedbox - {\bgroup - \dowithnextbox - {\setbox\nextbox\hbox - {\lower - \dimexpr(\htdp\nextbox-\lineheight)/\plustwo+\strutdp\relax - \box\nextbox}% - \ht\nextbox\strutht - \dp\nextbox\strutdp - \box\nextbox - \egroup}% - \hbox} - -%D \macros -%D {struttedbox} -%D -%D This boxing macro limits the height and depth to those of -%D a strut. - -\unexpanded\def\struttedbox - {\hbox\bgroup - \dowithnextboxcs\syst_boxes_struttedbox_finish\hbox} - -\def\syst_boxes_struttedbox_finish - {\dp\nextbox\strutdepth - \ht\nextbox\strutheight - \box\nextbox - \egroup} - -%D \macros -%D {topskippedbox} -%D -%D This macro compensates the difference between the topskip -%D and strutheight. Watch how we preserve the depth when it -%D equals strutdepth. - -\unexpanded\def\topskippedbox - {\hbox\bgroup\dowithnextboxcs\syst_boxes_topskippedbox_finish\hbox} - -\def\syst_boxes_topskippedbox_finish - {\edef\m_boxes_tmp{\ifdim\strutdepth=\dp\nextbox\dp\nextbox\the\dp\nextbox\fi}% - \lower\topskip\hbox{\raise\strutheight\box\nextbox}% - \m_boxes_tmp - \egroup} - -%D \macros -%D {centeredbox, centerednextbox} -%D -%D Here is another strange one. This one offers a sort of overlay -%D with positive or negative offsets. This command can be used -%D in well defined areas where no offset options are available. -%D We first used it when building a button inside the margin -%D footer, where the button should have a horizontal offset and -%D should be centered with respect to the surrounding box. The -%D last of the three examples we show below says: -%D -%D \starttyping -%D \vsize=3cm -%D \hsize=3cm -%D \ruledvbox to \vsize -%D {\centeredbox height .5cm width -1cm -%D {\vrule width \hsize height \vsize}}} -%D \stoptyping -%D -%D Here the \type{\ruledvbox} just shows the surrounding box -%D and \type{\vrule} is used to show the centered box. -%D -%D \def\AnExample#1#2% -%D {\vsize=3cm -%D \hsize=3cm -%D \ruledvbox to \vsize -%D {\centeredbox height #1 width #2 -%D {\color[green]{\vrule width \hsize height \vsize}}}} -%D -%D \startlinecorrection -%D \startcombination[3*1] -%D {\AnExample {-1cm} {.5cm}} {} -%D {\AnExample {.5cm} {-1cm}} {} -%D {\AnExample {-1cm} {-.5cm}} {} -%D \stopcombination -%D \stoplinecorrection -%D -%D This command takes two optional arguments: \type{width} and -%D \type{height}. Observing readers can see that we use \TEX's -%D own scanner for grabbing these arguments: \type{#1#} reads -%D everyting till the next brace and passes it to both rules. -%D The setting of the box dimensions at the end is needed for -%D special cases. The dimensions of the surrounding box are kept -%D intact. This commands handles positive and negative -%D dimensions (which is why we need two boxes with rules). - -\unexpanded\def\centeredbox#1#% height +/-dimen width +/-dimen - {\bgroup - \setbox0\vbox to \vsize - \bgroup - \dontcomplain - \forgetall - \setbox0\hbox{\vrule\s!width \zeropoint#1}% - \setbox2\vbox{\hrule\s!height\zeropoint#1}% - \advance\vsize \ht2 - \advance\hsize \wd0 - \vbox to \vsize - \bgroup - \vskip-\ht2 - \vss - \hbox to \hsize - \bgroup - \dowithnextbox - {\hskip-\wd0 - \hss - \box\nextbox - \hss - \egroup - \vss - \egroup - \egroup - \wd0\hsize - \ht0\vsize - \box0 - \egroup} - \hbox} - -%D For those who don't want to deal with \type {\hsize} -%D and \type {\vsize}, we have: -%D -%D \starttyping -%D \centerednextbox width 2bp height 2bp -%D {\framed[width=100bp,height=100bp]{}} -%D \stoptyping -%D -%D Do you see what we call this one \type {next}? - -\unexpanded\def\centerednextbox#1#% - {\bgroup - \dowithnextbox - {\hsize\wd\nextbox - \vsize\ht\nextbox - \centeredbox#1{\box\nextbox}% - \egroup} - \hbox} - -%D \macros -%D {centerbox} -%D -%D Centering on the available space is done by: -%D -%D \starttyping -%D \centerbox <optional specs> {content} -%D \stoptyping -%D -%D When omitted, the current \type {\hsize} and \type -%D {\vsize} are used. Local dimensions are supported. - -\unexpanded\def\centerbox#1#% optional height +/-dimen width +/-dimen - {\bgroup - \dowithnextbox - {\setlocalhsize - \setbox\scratchbox\hbox{\vrule\s!width \zeropoint#1}% - \ifzeropt\wd\scratchbox\else\hsize\wd\scratchbox\fi - \setbox\scratchbox\vbox{\hrule\s!height\zeropoint#1}% - \ifzeropt\ht\scratchbox\else\vsize\ht\scratchbox\fi - \vbox to \vsize{\vss\hbox to \hsize{\hss\box\nextbox\hss}\vss}% - \egroup}% - \hbox} - -%D \macros -%D {setrigidcolumnhsize,rigidcolumnbalance,rigidcolumnlines} -%D -%D These macros are copied from the \TEX book, page~397, and -%D extended by a macro that sets the \type{\hsize}. -%D -%D \starttyping -%D \setrigidcolumnhsize {total width} {distance} {n} -%D \rigidcolumnbalance {box} -%D \stoptyping -%D -%D Both these macros are for instance used in typesetting -%D footnotes. -%D -%D Men kan het proces van breken enigzins beinvloeden met de -%D volgende twee switches: - -\newif\ifalignrigidcolumns -\newif\ifstretchrigidcolumns -\newif\iftightrigidcolumns % if true: just a vbox, no depth/noflines/gridsnap corrrections - -%D De eerste switch bepaald het uitlijnen, de tweede rekt de -%D individuele kolommen op naar \type{\vsize}. - -\unexpanded\def\setrigidcolumnhsize#1#2#3% todo: \dimexpr - {\xdef\savedrigidhsize{\the\hsize}% - \hsize#1\relax - \global\chardef\rigidcolumns#3\relax - \scratchdimen -#2\relax - \multiply\scratchdimen #3\relax - \advance\scratchdimen #2\relax - \advance\hsize \scratchdimen - \divide\hsize #3\relax} - -% == -% -% \def\setrigidcolumnhsize#1#2#3% -% {\xdef\savedrigidhsize{\the\hsize}% -% \global\chardef\rigidcolumns#3\relax -% \hsize=\dimexpr(#1-\numexpr#3-1\relax\dimexpr#2\relax)/#3\relax} - -\newbox\rigidcolumnbox - -\let\rigidcolumnlines\!!zerocount - -\unexpanded\def\rigidcolumnbalance#1% - {\ifnum\rigidcolumns=1 % tzt ook h/d correctie - \ifinner\ifhmode\box\else\unvbox\fi\else\unvbox\fi#1\relax - \else - \vbox - {\forgetall - \nopenalties - \dontcomplain - \setbox\rigidcolumnbox\vbox - {\line{}\goodbreak\unvbox#1\removebottomthings}% - \splittopskip\openstrutheight - \setbox\scratchbox\vsplit\rigidcolumnbox to \zeropoint - \ifcase\rigidcolumnlines\relax - % \iffalse - % % maybe some day an option - % \scratchskip\ht\rigidcolumnbox - % \advance\scratchskip\dp\rigidcolumnbox - % \getnoflines\scratchskip - % \ifodd\noflines - % \advance\noflines\plusone - % \fi - % \divide\noflines\rigidcolumns - %\else - \scratchdimen\ht\rigidcolumnbox - \divide\scratchdimen \rigidcolumns - \getnoflines\scratchdimen - %\fi - \else - \noflines\rigidcolumnlines % to be sure - \fi - \scratchdimen\noflines\lineheight - % new: we now loop so that we don't loose content - % since in practice we also use this macro for - % funny lineheights and border cases - \setbox0=\box\rigidcolumnbox - \doloop - {\setbox\rigidcolumnbox=\copy0 - \setbox\scratchbox\hbox to \savedrigidhsize - {\dorecurse\rigidcolumns - {\setbox\scratchbox\vsplit\rigidcolumnbox to \scratchdimen - \dp\scratchbox\openstrutdepth - \setbox\scratchbox\normalvtop - \ifalignrigidcolumns to - \ifstretchrigidcolumns\vsize\else\scratchdimen\fi - \fi - {\unvbox\scratchbox}% - \wd\scratchbox\hsize - \box\scratchbox - \hfill}% - \hfillneg}% - \ifvoid\rigidcolumnbox\exitloop\else\advance\scratchdimen\lineheight\fi}% - \iftightrigidcolumns - \setbox\scratchbox\hbox{\raise\dp\scratchbox\box\scratchbox}% - \else - \advance\scratchdimen -\openstrutdepth - \setbox\scratchbox\hbox{\raise\scratchdimen\box\scratchbox}% - \dp\scratchbox\openstrutdepth - \ht\scratchbox\scratchdimen - \fi - \box\scratchbox}% - \fi} - -%D \macros -%D {startvboxtohbox,stopvboxtohbox,convertvboxtohbox} -%D -%D Here is another of Knuth's dirty tricks, as presented on -%D pages 398 and 399 of the \TEX book. These macros can be used -%D like: -%D -%D \starttyping -%D \vbox -%D \bgroup -%D \startvboxtohbox ... \stopvboxtohbox -%D \startvboxtohbox ... \stopvboxtohbox -%D \startvboxtohbox ... \stopvboxtohbox -%D \egroup -%D -%D \vbox -%D \bgroup -%D \convertvboxtohbox -%D \egroup -%D \stoptyping -%D -%D These macros are used in reformatting footnotes, so they do -%D what they're meant for. - -\newdimen\vboxtohboxslack -\newdimen\hboxestohboxslack - -% Create line and fake height of paragraph by messign with heights: -% a nice hack by DEK himself. - -%\unexpanded\def\setvboxtohbox -% {\bgroup -% \ifdim\baselineskip<16pt \relax -% \scratchdimen\baselineskip -% \multiply\scratchdimen 1024 -% \else -% \message{cropping \baselineskip to 16pt}% -% \scratchdimen\maxdimen -% \fi -% \divide\scratchdimen \hsize -% \multiply\scratchdimen 64 -% \xdef\vboxtohboxfactor{\withoutpt\the\scratchdimen}% -% \egroup} -% -% \unexpanded\def\startvboxtohbox -% {\bgroup -% \setvboxtohbox -% \setbox\scratchbox\hbox\bgroup} -% -% \unexpanded\def\stopvboxtohbox -% {\ifcase\vboxtohboxslack\else\hskip\zeropoint\!!minus\vboxtohboxslack\fi -% \egroup -% \dp\scratchbox\zeropoint -% \ht\scratchbox\vboxtohboxfactor\wd\scratchbox -% \box\scratchbox -% \egroup} - -% More modern: - -% \definesystemattribute[vboxtohboxseparator][public] - -%newbox\d_syst_boxes_vboxtohbox -\newbox\d_syst_boxes_separator - -\unexpanded\def\startvboxtohboxseparator - {\setbox\d_syst_boxes_separator\hbox attr \vboxtohboxseparatorattribute\plusone\bgroup} - -\unexpanded\def\stopvboxtohboxseparator - {\egroup} - -\unexpanded\def\startvboxtohbox - {\begingroup - \setbox\scratchbox\hbox\bgroup} - -\unexpanded\def\stopvboxtohbox - {\ifvoid\d_syst_boxes_separator - \hskip\zeropoint\ifcase\vboxtohboxslack\else\s!minus\vboxtohboxslack\fi % we really need a skip - \else - \box\d_syst_boxes_separator - \fi - \egroup - \clf_hboxtovbox\scratchbox - \box\scratchbox - \endgroup} - -% A possible reconstruction: - -\unexpanded\def\convertvboxtohbox - {\makehboxofhboxes - \setbox0\hbox{\unhbox0 \removehboxes}% - \noindent\unhbox0\par} - -\unexpanded\def\makehboxofhboxes - {\setbox0\emptyhbox - \loop % \doloop { .. \exitloop .. } - \setbox2\lastbox - \ifhbox2 - \setbox0\hbox{\box2\unhbox0}% - \repeat} - -\unexpanded\def\removehboxes - {\setbox0\lastbox - \ifhbox0 - {\removehboxes}\unhbox0 - \fi} - -% And one special for notes: - -% \unexpanded\def\starthboxestohbox -% {\bgroup -% \beginofshapebox} -% -% \unexpanded\def\stophboxestohbox -% {\endofshapebox -% \doreshapebox -% {\hbox\bgroup -% \unhbox\shapebox -% \ifcase\hboxestohboxslack\else\hskip\zeropoint\!!minus\hboxestohboxslack\fi -% \egroup}% -% \donothing -% \donothing -% \donothing % get rid of penalties etc -% \innerflushshapebox -% \convertvboxtohbox -% \par -% \egroup} - -% More modern: - -\unexpanded\def\starthboxestohbox - {\bgroup - \setbox\scratchbox\vbox\bgroup} - -\unexpanded\def\stophboxestohbox - {\egroup - \clf_vboxlisttohbox\scratchbox\nextbox\dimexpr\hboxestohboxslack\relax - \dontleavehmode - \unhbox\nextbox - \removeunwantedspaces - \par - \egroup} - -%D \macros -%D {unhhbox} -%D -%D The next macro is used in typesetting inline headings. -%D Let's first look at the macro and then show an example. - -\newbox \unhhedbox -\newbox \hhbox -\newdimen \lasthhboxwidth -\newskip \hhboxindent - -\unexpanded\def\unhhbox#1\with#2% - {\bgroup - \nopenalties - \dontcomplain - \forgetall - \setbox\unhhedbox\vbox{\hskip\hhboxindent\strut\unhbox#1}% => \hsize - \doloop - {\setbox\hhbox\vsplit\unhhedbox to \lineheight - \ifvoid\unhhedbox - \setbox\hhbox\hbox{\strut\hboxofvbox\hhbox}% - \fi - \ht\hhbox\strutht - \dp\hhbox\strutdp - \ifzeropt\hhboxindent\else % \ifdim\hhboxindent=\zeropoint\else - \setbox\hhbox\hbox{\kern-\hhboxindent\box\hhbox}% - \hhboxindent\zeropoint - \fi - \global\lasthhboxwidth\wd\hhbox - #2\relax - \ifvoid\unhhedbox - \exitloop - \else - \hskip\zeropoint \s!plus \zeropoint - \fi}% - \egroup} - -\def\dohboxofvbox - {\setbox0\vbox{\unvbox\scratchcounter\global\setbox1\lastbox}% - \unhbox1 - \egroup} - -\unexpanded\def\hboxofvbox - {\bgroup - \afterassignment\dohboxofvbox - \scratchcounter=} - -%D This macro can be used to break a paragraph apart and treat -%D each line seperately, for instance, making it clickable. The -%D main complication is that we want to be able to continue the -%D paragraph, something that's needed in the in line section -%D headers. -%D -%D \startbuffer -%D \setbox0=\hbox{\input tufte \relax} -%D \setbox2=\hbox{\input knuth \relax} -%D \unhhbox0\with{\ruledhbox{\box\hhbox}} -%D \hskip1em plus 1em minus 1em -%D \hhboxindent=\lasthhboxwidth -%D \advance\hhboxindent by \lastskip -%D \unhhbox2\with{\ruledhbox{\box\hhbox}} -%D \stopbuffer -%D -%D \getbuffer -%D -%D This piece of text was typeset by saying: -%D -%D \typebuffer -%D -%D Not that nice a definition, but effective. Note the stretch -%D we've build in the line that connects the two paragraphs. - -%D \macros -%D {doifcontent} -%D -%D When processing depends on the availability of content, one -%D can give the next macro a try. -%D -%D \starttyping -%D \doifcontent{pre content}{post content}{no content}\somebox -%D \stoptyping -%D -%D Where \type{\somebox} is either a \type{\hbox} or -%D \type{\vbox}. If the dimension of this box suggest some -%D content, the resulting box is unboxed and surrounded by the -%D first two arguments, else the third arguments is executed. - -\unexpanded\def\doifcontent#1#2#3% - {\dowithnextbox - {\ifhbox\nextbox - \ifdim\wd\nextbox>\zeropoint - #1\unhbox\nextbox#2\relax - \else - #3\relax - \fi - \else - \ifdim\ht\nextbox>\zeropoint - #1\unvbox\nextbox#2\relax - \else - #3\relax - \fi - \fi}} - -%D So when we say: -%D -%D \startbuffer -%D \doifcontent{[}{]}{}\hbox{content sensitive typesetting} -%D -%D \doifcontent{}{\page}{}\vbox{content sensitive typesetting} -%D -%D \doifcontent{}{}{\message{Didn't you forget something?}}\hbox{} -%D \stopbuffer -%D -%D \typebuffer -%D -%D We get: -%D -%D \getbuffer -%D -%D Where the last call of course does not show up in this -%D document, but definitely generates a confusing message. - -%D \macros -%D {processboxes} -%D -%D The next macro gobble boxes and is for instance used for -%D overlays. First we show the general handler. - -% we cannot use \futurelet here as we want to skip spaces between -% boxes (see startoverlay for an example usage) - -% \newbox\processbox % public : this is the one where \nextbox's end up in -% -% \unexpanded\def\processboxes#1% -% {\bgroup -% \def\syst_boxes_process_indeed{#1}% #1 can be redefined halfway -% \setbox\processbox\emptybox -% \afterassignment\syst_boxes_process -% \let\nexttoken} -% -% \def\syst_boxes_process -% {\ifx\nexttoken\bgroup -% \expandafter\syst_boxes_process_yes -% \else -% \expandafter\syst_boxes_process_nop -% \fi} -% -% \def\syst_boxes_process_yes -% {\dowithnextboxcs\syst_boxes_process_content\hbox\bgroup} -% -% \def\syst_boxes_process_content -% {\removeunwantedspaces -% \syst_boxes_process_indeed % takes \nextbox makes \processbox -% \afterassignment\syst_boxes_process -% \let\nexttoken} -% -% \unexpanded\def\syst_boxes_process_nop -% {\removeunwantedspaces -% \box\processbox -% \nexttoken % messy as we are still in the group -% \egroup} - -\newbox\processbox % public : this is the one where \nextbox's end up in - -\unexpanded\def\processboxes#1% - {\bgroup - \def\syst_boxes_process_indeed{#1}% #1 can be redefined halfway - \setbox\processbox\emptybox - \doifelsenextbgroup\syst_boxes_process_yes\syst_boxes_process_nop} - -\def\syst_boxes_process_yes - {\dowithnextboxcs\syst_boxes_process_content\hbox} - -\def\syst_boxes_process_content - {\removeunwantedspaces - \syst_boxes_process_indeed % takes \nextbox makes \processbox - \doifelsenextbgroup\syst_boxes_process_yes\syst_boxes_process_nop} - -\unexpanded\def\syst_boxes_process_nop - {\removeunwantedspaces - \box\processbox - \egroup} - -%D \macros -%D {startoverlay} -%D -%D We can overlay boxes by saying: -%D -%D \startbuffer -%D \startoverlay -%D {\framed{hans}} -%D {\framed[width=3cm]{ton}} -%D {\framed[height=2cm]{oeps}} -%D \stopoverlay -%D \stopbuffer -%D -%D \typebuffer -%D -%D shows up as: -%D -%D \leavevmode\getbuffer - -\def\syst_boxes_overlay_process - {%\removeunwantedspaces % already done - \scratchdepth\dp\ifdim\dp\nextbox>\dp\processbox\nextbox\else\processbox\fi - \ifdim\ht\nextbox>\ht\processbox - \setbox\processbox\vbox to \ht\nextbox {\dp\processbox\zeropoint\vss\box\processbox\vss}% - \else - \setbox\nextbox \vbox to \ht\processbox{\dp\nextbox \zeropoint\vss\box\nextbox \vss}% - \fi - \dp\nextbox \scratchdepth - \dp\processbox\scratchdepth - \scratchwidth\wd\ifdim\wd\nextbox>\wd\processbox\nextbox\else\processbox\fi - \setbox\processbox\hbox to \scratchwidth - {\hbox to \scratchwidth{\hss\box\processbox\hss}% - \kern-\scratchwidth - \hbox to \scratchwidth{\hss\box\nextbox \hss}}} - -\unexpanded\def\startoverlay - {\bgroup - \let\stopoverlay\egroup - \processboxes\syst_boxes_overlay_process} - -\let\stopoverlay\relax - -%D \macros -%D {fakebox} -%D -%D The next macro is a rather silly one, but saves space. -%D -%D \starttyping -%D \hbox{\fakebox0} -%D \stoptyping -%D -%D returns an empty box with the dimensions of the box -%D specified, here being zero. - -\unexpanded\def\fakebox - {\bgroup - \afterassignment\syst_boxes_fakebox_finish\scratchcounter} - -\def\syst_boxes_fakebox_finish - {\setbox\scratchbox\ifhbox\scratchcounter\emptyhbox\else\emptyvbox\fi - \wd\scratchbox\wd\scratchcounter - \ht\scratchbox\ht\scratchcounter - \dp\scratchbox\dp\scratchcounter - \box\scratchbox - \egroup} - -%D \macros -%D {lbox,rbox,cbox,tbox,bbox} -%D -%D Here are some convenient alternative box types: -%D -%D \starttyping -%D \lbox{text ...} -%D \cbox{text ...} -%D \rbox{text ...} -%D \stoptyping -%D -%D Are similar to \type {\vbox}, which means that they also -%D accept something like \type{to 3cm}, but align to the left, -%D middle and right. These box types can be used to typeset -%D paragraphs. - -\def\syst_boxes_lrc_process#1{\bgroup\forgetall\let\\\endgraf#1\let\next} - -\unexpanded\def\lbox#1#{\vbox#1\syst_boxes_lrc_process\raggedleft } -\unexpanded\def\cbox#1#{\vbox#1\syst_boxes_lrc_process\raggedcenter} -\unexpanded\def\rbox#1#{\vbox#1\syst_boxes_lrc_process\raggedright } - -\unexpanded\def\ltop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedleft } -\unexpanded\def\ctop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedcenter} -\unexpanded\def\rtop#1#{\normalvtop#1\syst_boxes_lrc_process\raggedright } - -%D The alternatives \type {\tbox} and \type {\bbox} can be used -%D to properly align boxes, like in: -%D -%D \setupexternalfigures[directory={../sample}] -%D \startbuffer -%D \starttable[|||] -%D \HL -%D \VL \tbox{\externalfigure[cow][height=3cm,frame=on]} \VL top aligned \VL\SR -%D \HL -%D \VL \bbox{\externalfigure[cow][height=3cm,frame=on]} \VL bottom aligned \VL\SR -%D \HL -%D \stoptable -%D \stopbuffer -%D -%D \typebuffer -%D -%D The positioning depends on the strut settings: -%D -%D \getbuffer - -\unexpanded\def\tbox{\hbox\bgroup\dowithnextboxcs\syst_boxes_tbox_finish\hbox} -\unexpanded\def\bbox{\hbox\bgroup\dowithnextboxcs\syst_boxes_bbox_finish\hbox} - -\def\syst_boxes_tbox_finish - {\scratchdepth\dimexpr\ht\nextbox+\dp\nextbox-\ht\strutbox\relax - \ht\nextbox\ht\strutbox - \dp\nextbox\scratchdepth - \setbox\nextbox\hbox{\lower\dp\nextbox\box\nextbox}% - \ht\nextbox\ht\strutbox - \dp\nextbox\scratchdepth - \box\nextbox - \egroup} - -\def\syst_boxes_bbox_finish - {\scratchheight\dimexpr\ht\nextbox+\dp\nextbox-\dp\strutbox\relax - \dp\nextbox\dp\strutbox - \ht\nextbox\scratchheight - \setbox\nextbox\hbox{\lower\dp\nextbox\box\nextbox}% - \dp\nextbox\dp\strutbox - \ht\nextbox\scratchheight - \box\nextbox - \egroup} - -%D \macros -%D {lhbox,mhbox,rhbox} -%D -%D A few more boxes. - -\def\dodolhbox{\hbox to \hsize{\box\nextbox\hss }} -\def\dodomhbox{\hbox to \hsize{\hss\box\nextbox\hss}} -\def\dodorhbox{\hbox to \hsize{\hss\box\nextbox }} - -\unexpanded\def\lhbox{\dowithnextboxcs\dodolhbox\hbox} -\unexpanded\def\mhbox{\dowithnextboxcs\dodomhbox\hbox} -\unexpanded\def\rhbox{\dowithnextboxcs\dodorhbox\hbox} - -\let\lefthbox \lhbox -\let\midhbox \mhbox -\let\righthbox\rhbox - -%D \macros -%D {boxofsize} -%D -%D Sometimes we need to construct a box with a height or -%D width made up of several dimensions. Instead of cumbersome -%D additions, we can use: -%D -%D \starttyping -%D \boxofsize \vbox 10cm 3cm -5cm {the text to be typeset} -%D \stoptyping -%D -%D This example demonstrates that one can use positive and -%D negative values. Dimension registers are also accepted. - -\newdimen\sizeofbox - -\unexpanded\def\boxofsize#1% - {\bgroup - \sizeofbox\zeropoint - \scratchdimen\zeropoint - \def\docommand - {\advance\sizeofbox\scratchdimen - \futurelet\next\dodocommand}% - \def\dodocommand - {\ifx\next\bgroup - \expanded{\egroup#1 to \the\sizeofbox}% - \else - \@EA\afterassignment\@EA\docommand\@EA\scratchdimen - \fi}% - \docommand} - -%D Some new, still undocumented features: - -% limitatetext -> beter {text} als laatste !! -% -% \limitvbox -% \limithbox - -\unexpanded\def\limitatelines#1#2% size sentinel - {\dowithnextbox - {\dimen0=#1\hsize - \ifdim\wd\nextbox>\dimen0 - \setbox\nextbox\hbox - {\advance\dimen0 -.1\hsize - \limitatetext{\unhbox\nextbox}{\dimen0}{\nobreak#2}}% - \fi - \unhbox\nextbox} - \hbox} - -\unexpanded\def\fittoptobaselinegrid % weg hier - {\dowithnextbox - {\bgroup - \par - \dimen0\ht\nextbox - \ht\nextbox\strutht - \dp\nextbox\strutdp - \hbox{\box\nextbox} - \prevdepth\strutdp - \doloop - {\advance\dimen0 -\lineheight - \ifdim\dimen0<\zeropoint - \exitloop - \else - \nobreak - \hbox{\strut} - \fi} - \egroup} - \vbox} - -%D Some more undocumented macros (used in m-chart). - -\newif\iftraceboxplacement % \traceboxplacementtrue - -\newbox\fakedboxcursor - -\setbox\fakedboxcursor\hbox - {\vrule\s!width\zeropoint\s!height\zeropoint\s!depth\zeropoint} - -\unexpanded\def\boxcursor % overloaded in core-vis - {\iftraceboxplacement - \bgroup - \scratchdimen2\onepoint - \setbox\scratchbox\hbox to \zeropoint - {\hss - \vrule - \s!width \scratchdimen - \s!height\scratchdimen - \s!depth \scratchdimen - \hss}% - \smashedbox\scratchbox - \egroup - \else - \copy\fakedboxcursor - \fi} - -\unexpanded\def\placedbox - {\iftraceboxplacement\ruledhbox\else\hbox\fi} - -\newdimen\boxoffset -\newdimen\boxhdisplacement -\newdimen\boxvdisplacement - -\unexpanded\def\rightbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_rightbox_finish \placedbox} -\unexpanded\def\leftbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_leftbox_finish \placedbox} -\unexpanded\def\topbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_topbox_finish \placedbox} -\unexpanded\def\bottombox {\hbox\bgroup\dowithnextboxcs\syst_boxes_bottombox_finish \placedbox} -\unexpanded\def\lefttopbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_lefttopbox_finish \placedbox} -\unexpanded\def\righttopbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_righttopbox_finish \placedbox} -\unexpanded\def\leftbottombox {\hbox\bgroup\dowithnextboxcs\syst_boxes_leftbottombox_finish \placedbox} -\unexpanded\def\rightbottombox{\hbox\bgroup\dowithnextboxcs\syst_boxes_rightbottombox_finish\placedbox} - -\let\topleftbox \lefttopbox -\let\toprightbox \righttopbox -\let\bottomleftbox \leftbottombox -\let\bottomrightbox\rightbottombox - -\def\syst_boxes_rightbox_finish - {\global\boxhdisplacement\boxoffset - \global\boxvdisplacement.5\ht\nextbox - \global\advance\boxvdisplacement-.5\dp\nextbox - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_leftbox_finish - {\global\boxhdisplacement-\wd\nextbox - \global\advance\boxhdisplacement-\boxoffset - \global\boxvdisplacement.5\ht\nextbox - \global\advance\boxvdisplacement-.5\dp\nextbox - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_topbox_finish - {\global\boxhdisplacement-.5\wd\nextbox - \global\boxvdisplacement-\dp\nextbox - \global\advance\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_bottombox_finish - {\global\boxhdisplacement-.5\wd\nextbox - \global\boxvdisplacement\ht\nextbox - \global\advance\boxvdisplacement\boxoffset - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_lefttopbox_finish - {\global\boxhdisplacement-\wd\nextbox - \global\advance\boxhdisplacement-\boxoffset - \global\boxvdisplacement-\dp\nextbox - \global\advance\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_righttopbox_finish - {\global\boxhdisplacement\boxoffset - \global\boxvdisplacement-\dp\nextbox - \global\advance\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_leftbottombox_finish - {\global\boxhdisplacement-\wd\nextbox - \global\advance\boxhdisplacement-\boxoffset - \global\boxvdisplacement\ht\nextbox - \global\advance\boxvdisplacement\boxoffset - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_rightbottombox_finish - {\global\boxhdisplacement\boxoffset - \global\boxvdisplacement\ht\nextbox - \global\advance\boxvdisplacement\boxoffset - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\unexpanded\def\middlebox {\hbox\bgroup\dowithnextboxcs\syst_boxes_middlebox_finish \placedbox} -\unexpanded\def\baselinemiddlebox{\hbox\bgroup\dowithnextboxcs\syst_boxes_baselinemiddlebox_finish\placedbox} -\unexpanded\def\baselineleftbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_baselineleftbox_finish \placedbox} -\unexpanded\def\baselinerightbox {\hbox\bgroup\dowithnextboxcs\syst_boxes_baselinerightbox_finish \placedbox} - -\def\syst_boxes_middlebox_finish - {\global\boxhdisplacement-.5\wd\nextbox - \global\boxvdisplacement.5\ht\nextbox - \global\advance\boxvdisplacement-.5\dp\nextbox - \boxcursor\kern\boxhdisplacement\lower\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_baselinemiddlebox_finish - {\global\boxhdisplacement-.5\wd\nextbox - \global\advance\boxhdisplacement-\boxoffset - \global\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_baselineleftbox_finish - {\global\boxhdisplacement-\wd\nextbox - \global\advance\boxhdisplacement-\boxoffset - \global\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -\def\syst_boxes_baselinerightbox_finish - {\global\boxhdisplacement\boxoffset - \global\boxvdisplacement-\boxoffset - \boxcursor\kern\boxhdisplacement\raise-\boxvdisplacement\box\nextbox - \egroup} - -%D \macros -%D {obox} -%D -%D Experimental, not yet frozen: - -\unexpanded\def\lrtbbox#1#2#3#4% l r t b - {\bgroup - \dowithnextboxcontent - {\advance\hsize-#1\advance\hsize-#2\relax - \advance\vsize-#3\advance\vsize-#4\relax} - {\forgetall\vbox to \vsize{\vskip#3\hbox to \hsize{\hskip#1\box\nextbox\hss}\vss}\egroup} - \vbox} - -%D \macros -%D {toplinebox} -%D -%D See core-tbl.tex for an example of its usage: - -\unexpanded\def\toplinebox - {\dowithnextboxcs\syst_boxes_toplinebox_finish\tbox} - -\def\syst_boxes_toplinebox_finish - {\ifdim\dp\nextbox>\strutdepth - \scratchdimen\dp\nextbox - \advance\scratchdimen-\strutdepth - \getnoflines\scratchdimen - \struttedbox{\box\nextbox}% - \dorecurse\noflines\verticalstrut - \else - \box\nextbox - \fi} - -%D \macros -%D {initializeboxstack,savebox,foundbox} -%D -%D At the cost of some memory, but saving box registers, we -%D have implemented a box repository. -%D -%D \starttyping -%D \initializeboxstack{one} -%D -%D \savebox{one}{a}{test a} -%D \savebox{one}{p}{test p} -%D \savebox{one}{q}{test q} -%D -%D \hbox{a:\foundbox{one}{a}} \par -%D \hbox{q:\foundbox{one}{q}} \par -%D \hbox{p:\foundbox{one}{p}} \par -%D \hbox{x:\foundbox{one}{x}} \par -%D \hbox{y:\foundbox{two}{a}} \par -%D \stoptyping - -\installcorenamespace {stackbox} -\installcorenamespace {stacklst} - -\unexpanded\def\setstackbox#1#2% - {\ifcsname\??stackbox#1:#2\endcsname\else - \expandafter\newbox\csname\??stackbox#1:#2\endcsname - \fi - \global\setbox\csname\??stackbox#1:#2\endcsname\vbox} - -\unexpanded\def\initializeboxstack#1% - {\def\docommand##1{\setstackbox{#1}{##1}{}}% - \ifcsname\??stacklst#1\endcsname - \processcommacommand[\getvalue{\??stacklst#1}]\docommand - \fi - \letgvalueempty{\??stacklst#1}} - -\unexpanded\def\savebox#1#2% stack name - {% beware, \setxvalue defines the cs beforehand so we cannot use the - % test inside the { } - \ifcsname\??stacklst#1\endcsname - \setxvalue{\??stacklst#1}{\csname\??stacklst#1\endcsname,#2}% - \else - \setxvalue{\??stacklst#1}{#2}% - \fi - \setstackbox{#1}{#2}} - -\unexpanded\def\restorebox#1#2% unwrapped - {\ifcsname\??stackbox#1:#2\endcsname - \copy\csname\??stackbox#1:#2\endcsname - \else - \emptybox - \fi} - -\unexpanded\def\foundbox#1#2% wrapped - {\vbox - {\ifcsname\??stackbox#1:#2\endcsname - \copy\csname\??stackbox#1:#2\endcsname - \fi}} - -\unexpanded\def\doifelsebox#1#2#3#4% - {\ifcsname\??stackbox#1:#2\endcsname - \ifvoid\csname\??stackbox#1:#2\endcsname#4\else#3\fi - \else - #4% - \fi} - -\let\doifboxelse\doifelsebox - -%D This one is cheaper (the above is no longer used that much): - -\installcorenamespace {boxstack} - -\newcount\c_syst_boxes_stack -\let \b_syst_boxes_stack\relax - -\unexpanded\def\syst_boxes_stack_allocate - {\newbox\b_syst_boxes_stack - \expandafter\let\csname\??boxstack\number\c_syst_boxes_stack\endcsname\b_syst_boxes_stack} - -\unexpanded\def\syst_boxes_push#1#2% - {\global\advance\c_syst_boxes_stack\plusone - \expandafter\let\expandafter\b_syst_boxes_stack\csname\??boxstack\number\c_syst_boxes_stack\endcsname - \ifx\b_syst_boxes_stack\relax % cheaper then csname check as in most cases it's defined - \syst_boxes_stack_allocate - \fi - #1\setbox\b_syst_boxes_stack\box#2\relax} - -\unexpanded\def\syst_boxes_pop#1#2% - {#1\setbox#2\box\csname\??boxstack\number\c_syst_boxes_stack\endcsname - \global\advance\c_syst_boxes_stack\minusone} - -\unexpanded\def\localpushbox {\syst_boxes_push\relax} -\unexpanded\def\localpopbox {\syst_boxes_pop \relax} - -\unexpanded\def\globalpushbox{\syst_boxes_push\global} -\unexpanded\def\globalpopbox {\syst_boxes_pop \global} - -%D \macros -%D {removedepth, obeydepth} -%D -%D While \type {\removedepth} removes the preceding depth, -%D \type {\obeydepth} makes sure we have depth. Both macros -%D leave the \type {\prevdepth} untouched. - -\unexpanded\def\removedepth - {\ifvmode - \ifdim\prevdepth>\zeropoint - \kern-\prevdepth - \fi - \fi} - -\unexpanded\def\obeydepth - {\par - \ifvmode - \ifdim\prevdepth>\zeropoint - \kern-\prevdepth - \fi - \kern\strutdp - \fi} - -\unexpanded\def\undepthed - {\dowithnextbox{\dp\nextbox\zeropoint\box\nextbox}\hbox} - -%D \macros -%D {removebottomthings, removelastskip} -%D -%D A funny (but rather stupid) one, plus a redefinition. - -\unexpanded\def\removebottomthings - {\dorecurse5{\unskip\unkern\unpenalty}} - -\unexpanded\def\removelastskip % \ifvmode the plain tex one \fi - {\ifvmode\ifzeropt\lastskip\else\vskip-\lastskip\fi\fi} - -%D \macros -%D {makestrutofbox} -%D -%D This macro sets the dimensions of a box to those of a strut. Sort of obsolete -%D so it will go away. - -\unexpanded\def\makestrutofbox % not used - {\afterassignment\syst_boxes_makestrutofbox\c_boxes_register} - -\def\syst_boxes_makestrutofbox - {\ht\c_boxes_register\strutht - \dp\c_boxes_register\strutdp - \wd\c_boxes_register\zeropoint} - -%D \macros -%D {raisebox,lowerbox} -%D -%D Some more box stuff, related to positioning (under -%D construction). Nice stuff for a tips and tricks maps -%D article. -%D -%D \starttyping -%D \raisebox{100pt}\hbox{test} -%D \hsmash{\raisebox{100pt}\hbox{test}} -%D \stoptyping - -\unexpanded\def\raisebox#1{\bgroup\afterassignment\syst_boxes_raise_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted -\unexpanded\def\lowerbox#1{\bgroup\afterassignment\syst_boxes_lower_indeed\scratchdimen#1} % so both 10pt and {10pt} is accepted - -\def\syst_boxes_raise_indeed{\dowithnextboxcs\syst_boxes_raise_finish} -\def\syst_boxes_lower_indeed{\dowithnextboxcs\syst_boxes_lower_finish} - -\def\syst_boxes_raise_finish - {\setbox\nextbox\hbox{\raise\scratchdimen\box\nextbox}% - \ht\nextbox\strutht - \dp\nextbox\strutdp - \box\nextbox - \egroup} - -\def\syst_boxes_lower_finish - {\setbox\nextbox\hbox{\lower\scratchdimen\box\nextbox}% - \ht\nextbox\strutht - \dp\nextbox\strutdp - \box\nextbox - \egroup} - -% vcenter in text, we kunnen vcenter overloaden - -\unexpanded\def\halfwaybox - {\hbox\bgroup - \dowithnextboxcs\syst_boxes_halfwaybox_finish\hbox} - -\def\syst_boxes_halfwaybox_finish - {\dp\nextbox\zeropoint - \lower.5\ht\nextbox\box\nextbox - \egroup} - -\unexpanded\def\depthonlybox - {\vtop\bgroup - \dowithnextboxcs\syst_boxes_depthonlybox_finish\vbox} - -\def\syst_boxes_depthonlybox_finish - {\hsize\wd\nextbox - \kern\zeropoint\box\nextbox - \egroup} - -%D New: - -\def\setdimentoatleast#1#2{\ifdim#1>\zeropoint\else#1=#2\fi} -\def\setdimentoatmost #1#2{\ifdim#1>#2\relax \else#1=#2\fi} - -%D And even rawer: - -\let\naturalhbox \hbox -\let\naturalvbox \vbox -\let\naturalvtop \normalvtop -\let\naturalvcenter\normalvtop - -\ifdefined\textdir - - \unexpanded\def\naturalhbox{\hbox dir TLT} - \unexpanded\def\naturalvbox{\vbox dir TLT} - %\unexpanded\def\naturalvtop{\normalvtop dir TLT} - -\fi - -%D \macros -%D {vcenter} -%D -%D Also new: tex mode \type {\vcenter}. - -\unexpanded\def\vcenter - {\vbox\bgroup - \dowithnextboxcs\syst_boxes_vcenter_finish\vbox} - -\def\syst_boxes_vcenter_finish - {\hbox{$\normalvcenter{\box\nextbox}$}% - \egroup} - -% could be \everymathematics - -\prependtoks \let\vcenter\normalvcenter \to \everymath -\prependtoks \let\vcenter\normalvcenter \to \everydisplay - -% \appendtoks \let\vcenter\normalvcenter \to \everymathematics - -%D \macros -%D {frozenhbox} -%D -%D A not so well unhboxable box can be made with: - -\unexpanded\def\frozenhbox - {\hbox\bgroup - \dowithnextboxcs\syst_boxes_frozenhbox_finish\hbox} - -\def\syst_boxes_frozenhbox_finish - {\hbox{\hbox{\box\nextbox}}% - \egroup} - -%D \macros -%D {setboxllx,setboxlly,gsetboxllx,gsetboxlly,getboxllx,getboxlly} -%D -%D A prelude to an extended \TEX\ feature: - -\installcorenamespace {box_x} -\installcorenamespace {box_y} - -\unexpanded\def\setboxllx #1#2{\expandafter\edef\csname\??box_x\number#1\endcsname{\the\dimexpr#2\relax}} -\unexpanded\def\setboxlly #1#2{\expandafter\edef\csname\??box_y\number#1\endcsname{\the\dimexpr#2\relax}} - -\unexpanded\def\gsetboxllx#1#2{\expandafter\xdef\csname\??box_x\number#1\endcsname{\the\dimexpr#2\relax}} -\unexpanded\def\gsetboxlly#1#2{\expandafter\xdef\csname\??box_y\number#1\endcsname{\the\dimexpr#2\relax}} - -\def\getboxllx#1{\ifcsname\??box_x\number#1\endcsname\csname\??box_x\number#1\endcsname\else\zeropoint\fi} -\def\getboxlly#1{\ifcsname\??box_y\number#1\endcsname\csname\??box_y\number#1\endcsname\else\zeropoint\fi} - -\def\directgetboxllx#1{\csname\??box_x\number#1\endcsname} % use when sure existence -\def\directgetboxlly#1{\csname\??box_y\number#1\endcsname} % use when sure existence - -%D \macros -%D {shownextbox} -%D -%D Handy for tracing -%D -%D \starttyping -%D \shownextbox\vbox{test} -%D \shownextbox\vbox{test\endgraf} -%D \shownextbox\vbox{test\endgraf\strut\endgraf} -%D \shownextbox\vbox{test\endgraf\thinrule} -%D \shownextbox\vbox{\setupwhitespace[big]test\endgraf\thinrule} -%D \stoptyping - -\unexpanded\def\shownextbox % seldom used - {\dowithnextbox - {\bgroup - \showboxbreadth\maxdimen - \showboxdepth \maxdimen - \scratchcounter\interactionmode - \batchmode - \showbox\nextbox - \box\nextbox - \interactionmode\scratchcounter - \egroup}} - -\unexpanded\def\spreadhbox#1% rebuilds \hbox{<box><hss><box><hss><box>} - {\bgroup - \ifhbox#1\relax - \setbox2\emptybox - \unhbox#1% - \doloop - {\unpenalty\unskip\unpenalty\unskip\unpenalty\unskip - \setbox0\lastbox - \ifvoid0 - \exitloop - \else - \setbox2\hbox - {\ifhbox0 \spreadhbox0\else\box0\fi - \ifvoid2 \else\hss\unhbox2\fi}% - \fi}% - \ifvoid2\else\unhbox2\fi - \else - \box#1% - \fi - \egroup} - -% makes sense but too much log for overfull boxes: -% -% \showboxbreadth\maxdimen -% \showboxdepth \maxdimen - -%D Moved from cont-new: -%D -%D \starttyping -%D \minimalhbox 100pt {test} -%D \stoptyping - -\unexpanded\def\minimalhbox#1#% - {\dowithnextbox - {\bgroup - \setbox\scratchbox\hbox#1{\hss}% - \ifdim\wd\nextbox<\wd\scratchbox\wd\nextbox\wd\scratchbox\fi - \box\nextbox - \egroup} - \hbox} - -%D A bit dirty: - -% \unexpanded\def\nodestostring#1% \cs {content} -% {\dowithnextbox{\edef#1{\syst_boxes_nodestostring}}\hbox} -% -% \def\syst_boxes_nodestostring -% {\clf_boxtostring\nextbox} - -\unexpanded\def\nodestostring#1#2% more tolerant for #2=\cs - {\begingroup - \setbox\nextbox\hbox{#2}% - \normalexpanded{\endgroup\edef\noexpand#1{\clf_boxtostring\nextbox}}} - -%D Even more dirty: - -\let\hyphenatedhbox\hbox - -\protect \endinput - -% a bit of test code: - -% \hbox \bgroup -% \ruledvbox {\hbox{\strut gans}} -% \ruledvbox to \lineheight {\hbox{\strut gans}} -% \ruledvbox to \lineheight {\hbox {gans}} -% \ruledvbox to \strutheight{\hbox {gans}} -% \ruledvbox to \strutheight{\hbox{\strut gans}} -% \ruledvbox to \strutheight{\vss\hbox{gans}} -% \egroup - -% to be considered - -% \startluacode -% -% local spacer = lpeg.patterns.spacer -% -% function commands.withwords(command,str) -% if str then -% command = command or "ruledhbox" -% local done = false -% local function apply(s) -% if done then -% context.space() -% done = true -% else -% context.dontleavehmode() -% end -% context[command](s) -% end -% lpeg.match(lpeg.splitter(spacer,apply),str) -% end -% -% end -% -% \stopluacode -% -% \unprotect -% -% \unexpanded\def\withwordsinstring#1#2% command str -% {\ctxcommand{withwords(\!!bs#1\!!es,\!!bs#2\!!es)}} -% -% \unexpanded\def\withwordsinfile#1#2% command name -% {\ctxcommand{withwords(\!!bs#1\!!es,io.loaddata(resolvers.findfile("#2")))}} -% -% \protect -% -% \starttext -% -% \defineframed[colored][foregroundcolor=red,foregroundstyle=\bfc\underbar,location=low] -% -% \withwordsinstring{colored}{bla bla} -% \withwordsinfile{colored}{ward.tex} -% -% \stoptext |