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Diffstat (limited to 'tex/context/base/mkiv/anch-pos.mkxl')
| -rw-r--r-- | tex/context/base/mkiv/anch-pos.mkxl | 504 |
1 files changed, 0 insertions, 504 deletions
diff --git a/tex/context/base/mkiv/anch-pos.mkxl b/tex/context/base/mkiv/anch-pos.mkxl deleted file mode 100644 index e232d9cd3..000000000 --- a/tex/context/base/mkiv/anch-pos.mkxl +++ /dev/null @@ -1,504 +0,0 @@ -%D \module -%D [ file=anch-pos, % was core-pos -%D version=1999.08.01, -%D title=\CONTEXT\ Anchoring Macros, -%D subtitle=Positioning Support, -%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 Anchoring Macros / Positioning} - -%D In \MKIV\ there was already a different housekeeping model for positions quite -%D early, but starting in 2012 more dramatic changes started to happen, especially -%D in relation to background graphics. It will probably take some time to settle. - -\registerctxluafile{anch-pos}{autosuffix} - -\unprotect - -%D The first application of positional information was embedded graphics. Since we -%D are interacting with text, it made sense to take the current line height and -%D depth into account too. This is why we have position macros for simple positions -%D and one boxes. -%D -%D \starttyping -%D \dosetposition {identifier} -%D \dosetpositionwhd {identifier} {width} {height} {depth} -%D \dosetpositionplus {identifier} {width} {height} {depth} {list} -%D \stoptyping - -% \dosaveposition #1#2#3#4 % defined at lua end -% \dosavepositionwhd #1#2#3#4#5#6#7 % defined at lua end -% \dosavepositionplus #1#2#3#4#5#6#7#8 % defined at lua end - -% \dosetposition #1 % defined at lua end -% \dosetpositionwhd #1#2#3#4 % defined at lua end -% \dosetpositionplus #1#2#3#4#5 % defined at lua end -% \dosetpositionbox #1#2 % defined at lua end -% \dosetpositionstrut #1 % defined at lua end -% \dosetpositionstrutkind #1#2 % defined at lua end - -\newbox\b_anch_position -\newif \ifpositioning % sort of public - -%D Sometimes we want to trick the position handler a bit: - -% \replacepospxywhd #1#2#3#4#5#6#7 % defined at lua end - -%D \macros -%D {MPp, MPx, MPy, MPw, MPh, MPd, MPxy, MPll, MPlr, MPur, MPul, MPpos, MPanchor} -%D -%D Access to the positional information is provided by macros with short names -%S that are clearly meant for \METAPOST\ but nowadays also used for other purposes. - -% \MPp : defined at lua end -% \MPr : defined at lua end -% \MPc : defined at lua end -% \MPn : defined at lua end -% \MPx : defined at lua end -% \MPy : defined at lua end -% \MPw : defined at lua end -% \MPh : defined at lua end -% \MPd : defined at lua end -% \MPxy : defined at lua end -% \MPwhd : defined at lua end -% \MPll : defined at lua end -% \MPlr : defined at lua end -% \MPur : defined at lua end -% \MPul : defined at lua end -% \MPpos : defined at lua end -% \MPls : defined at lua end -% \MPrs : defined at lua end -% \MPpardata : defined at lua end -% \MPxywhd : defined at lua end -% \MPposset : defined at lua end - -\aliased\let\MPpage \MPp -\aliased\let\MPregion \MPr -\aliased\let\MPcolumn \MPc -\aliased\let\MPparagraph\MPn - - \let\MPanchor \MPpos % overloaded locally when needed (todo: LMTX) - -\aliased\let\MPleftskip \MPls % compatible feature -\aliased\let\MPrightkip \MPrs % compatible feature - -%D \macros -%D {MPplus, MPrest, MPv, MPvv} -%D -%D Since we will probably keep on extending, we provide a general extension -%D macro. The plus alternative takes an extra argument, denoting what additional -%D parameter to pick up. So, the third extra is fetched with, -%D -%D \starttyping -%D \MPplus{identifier}{3}{default} -%D \stoptyping -%D -%D All extras (comma separated) are fetched with: -%D -%D \starttyping -%D \MPrest{identifier} -%D \stoptyping -%D -%D The extra parameters are not treated. - -% \MPplus #1#2#3 % defined at lua end -% \MPrest #1 % defined at lua end - -\aliased\let\MPv \MPplus -\aliased\let\MPvv\MPrest - -%D There are two low level positioning macros. Both store the position as well -%D as execute an action associated with that position. - -\let\dopositionaction\gobbleoneargument % implemented later - -\def\anch_positions_initialize - {\ifpositioning \else - \global\positioningtrue - \fi} - -\permanent\protected\def\setpositiononly - {\iftrialtypesetting - \expandafter\gobbleoneargument - \else - \expandafter\anch_positions_set_only_indeed - \fi} - -\def\anch_positions_set_only_indeed#1% - {\anch_positions_initialize - \edef\currentposition{#1}% - \dosetposition\currentposition} - -\permanent\protected\def\setposition - {\iftrialtypesetting - \expandafter\gobbleoneargument - \else - \expandafter\anch_positions_set_indeed - \fi} - -\def\anch_positions_set_indeed#1% - {\anch_positions_initialize - \edef\currentposition{#1}% - \dosetposition\currentposition - \anch_positions_trace_left - \dopositionaction\currentposition} - -\permanent\protected\def\setpositiondata - {\iftrialtypesetting - \expandafter\gobblefourarguments - \else - \expandafter\anch_positions_set_data_indeed - \fi} - -\def\anch_positions_set_data_indeed#1#2#3#4% - {\anch_positions_initialize - \hbox % \hpack - {\edef\currentposition{#1}% - \dosetpositionwhd\currentposition{#2}{#3}{#4}% already \the\dimexpr - \anch_positions_trace_left - \dopositionaction\currentposition - \hss}} - -\permanent\protected\def\setpositionbox - {\iftrialtypesetting - \expandafter\anch_positions_set_box_nop - \else - \expandafter\anch_positions_set_box_yes - \fi} - -\def\anch_positions_set_box_nop#1% - {\dowithnextboxcs\flushnextbox} - -\def\anch_positions_set_box_yes#1% - {\dowithnextbox{\anch_positions_set_box_finish{#1}}} - -\def\anch_positions_set_box_finish#1% - {\anch_positions_initialize - \hbox to \wd\nextbox % \hpack - {\edef\currentposition{#1}% - \dosetpositionbox\currentposition\nextbox - \anch_positions_trace_left - \setbox\b_anch_position\box\nextbox - \dopositionaction\currentposition - \box\b_anch_position - \hss}} - -\permanent\protected\def\setpositionstrut - {\iftrialtypesetting - \expandafter\anch_positions_set_strut_nop - \else - \expandafter\anch_positions_set_strut_yes - \fi} - -\def\anch_positions_set_strut_nop#1% - {\strut} - -\def\anch_positions_set_strut_yes#1% - {\anch_positions_initialize - \hbox to \zeropoint % \hpack - {\edef\currentposition{#1}% - \dosetpositionstrut\currentposition - \anch_positions_trace_left - \dopositionaction\currentposition - \strut - \hss}} - -\permanent\protected\def\setpositionstrutkind - {\iftrialtypesetting - \expandafter\anch_positions_set_strut_kind_nop - \else - \expandafter\anch_positions_set_strut_kind_yes - \fi} - -\def\anch_positions_set_strut_kind_yes#1#2% - {\anch_positions_initialize - \hbox to \zeropoint % \hpack - {\edef\currentposition{#1}% - \dosetpositionstrutkind\currentposition{#2}% - \anch_positions_trace_left - \dopositionaction\currentposition - \strut - \hss}} - -\def\anch_positions_set_strut_kind_nop#1#2% - {\strut} - -\permanent\protected\def\setpositiondataplus - {\iftrialtypesetting - \expandafter\gobblefivearguments - \else - \expandafter\anch_positions_set_plus_indeed - \fi} - -\def\anch_positions_set_plus_indeed#1#2#3#4#5% - {\anch_positions_initialize - \hbox % \hpack - {\edef\currentposition{#1}% - \dosetpositionplus\currentposition{#2}{#3}{#4}{#5}% already \the\dimexpr - \anch_positions_trace_right - \dopositionaction\currentposition - \hss}} - -\permanent\protected\def\setpositionplus - {\iftrialtypesetting - \expandafter\anch_positions_set_plus_nop - \else - \expandafter\anch_positions_set_plus_yes - \fi} - -\def\anch_positions_set_plus_nop#1#2% - {\dowithnextboxcs\flushnextbox} - -\def\anch_positions_set_plus_yes#1#2% - {\dowithnextbox{\anch_positions_set_plus_yes_finish{#1}{#2}}} - -\def\anch_positions_set_plus_yes_finish#1#2% - {\anch_positions_initialize - \hbox to \nextboxwd % \hpack - {\edef\currentposition{#1}% - \dosetpositionplus\currentposition{\wd\nextbox}{\ht\nextbox}{\dp\nextbox}{#2}% - \anch_positions_trace_right - \setbox\b_anch_position\flushnextbox - \dopositionaction\currentposition - \box\b_anch_position - \hss}} - -\let\currentposition\s!unknown - -%D A few special ones .. will be cleaned up - -\def\pageanchor {page:\the\realpageno} % for the moment only one pagesize -\def\textanchor {text:\the\realpageno} -\def\regionanchor{region:0} - -\newcount\c_anch_column % will be delegated to lua -\newcount\c_anch_text % will be delegated to lua - -% beware we need to pass \somethingexpanded or { } - -\protected\def\anch_mark_column_box#1#2% box n - {\global\advance\c_anch_column\plusone - \clf_markregionboxtaggedn#1{columnarea:\the\c_anch_column}#2\relax} % extra height - -\protected\def\anch_mark_region_box - {\iftrialtypesetting - \expandafter\gobbleoneargument - \orelse\ifpositioning - \expandafter\anch_mark_region_box_indeed - \else - \expandafter\gobbleoneargument - \fi} - -\protected\def\anch_mark_region_box_indeed#1% - {\clf_markregionbox#1\relax} - -\protected\def\anch_mark_flow_box#1% will be extended / renamed - {\hpack\bgroup - \global\advance\c_anch_text\plusone - \clf_markregionboxtagged#1{textarea:\the\c_anch_text}% - \box#1% - \egroup} - -\protected\def\anch_mark_tagged_box#1#2% - {\clf_markregionboxtagged#1{#2}} - -\protected\def\anch_mark_flow_only#1% will be extended / renamed - {\global\advance\c_anch_text\plusone - \clf_markregionboxcorrected#1{textarea:\the\c_anch_text}} - -\protected\def\anch_make_page_box#1% maybe like text - {\clf_setregionboxtagged#1{page:\the\realpageno}} - -\protected\def\anch_mark_text_box#1% - {\clf_markregionboxtagged#1{text:\the\realpageno}} % needs an hbox - -\newcount\c_anch_free - -\protected\def\anch_mark_tagged_box_free#1#2#3#4#5#6% only needed when positions - {\ifpositioning - \global\advance\c_anch_free\plusone % could be done at the lua end - \clf_markregionboxtaggedkind - #1% - {free:\number\c_anch_free}% - #2\space % kind - #3\space % leftoffset - #4\space % rightoffset - #5\space % topoffset - #6\relax % bottomoffset - \fi} - -% \reservedautoregiontag % define at lua end - -%D We can copy a position with: -%D -%D \starttyping -%D \copyposition {to} {from} -%D \stoptyping -%D -%D Again, this is a global operation. - -% \copyposition #1#2 % defined at lua end - -%D The fact that handling positions is a two pass operation, is one of the -%D reasons why we need to be able to test for existence, using: -%D -%D \starttyping -%D \doifpositionelse {identifier} {found action} {not found action} -%D \stoptyping - -% \doifposition #1 % defined at lua end -% \doifelseposition #1#2 % defined at lua end -% \doifelsepositiononpage #1#2 % defined at lua end - -\aliased\let\doifpositionelse \doifelseposition -\aliased\let\doifpositiononpageelse\doifelsepositiononpage - -%D \macros -%D {xypos} -%D -%D We have several macros available to save positions. Later we will see -%D applications. -%D -%D \starttabulate[|l|l||] -%D \NC \type {\xypos} \NC \NC simple position with no dimensions \NC \NR -%D \NC \type {\hpos} \NC \NC position and characteristics of a \type {\hbox} \NC \NR -%D \NC \type {\vpos} \NC \NC position and characteristics of a \type {\vbox} \NC \NR -%D \NC \type {\bpos} \NC b: \NC begin point in a line \NC \NR -%D \NC \type {\epos} \NC e: \NC end point in a line \NC \NR -%D \stoptabulate -%D -%D Each macro takes an identifier as argument, and the \type {\hpos} and -%D \type {\vpos} also expect box content. - -\aliased\let\xypos\setpositiononly - -\permanent\protected\def\hpos #1{\dontleavehmode\setpositionbox{#1}\hbox} -\permanent\protected\def\vpos #1{\setpositionbox{#1}\vbox} -\permanent\protected\def\bpos #1{\dontleavehmode\setpositionstrut{b:#1}\ignorespaces} -\permanent\protected\def\epos #1{\removeunwantedspaces\setpositionstrut{e:#1}} -\permanent\protected\def\bposkind#1#2{\dontleavehmode\setpositionstrutkind{b:#1}{#2}\ignorespaces} % not public, used in backgrounds -\permanent\protected\def\eposkind#1#2{\removeunwantedspaces\setpositionstrutkind{e:#1}{#2}} % not public, used in backgrounds - -%D When we want to calculate more complex backgrounds, we need to know what the -%D current indentation scheme is. At the cost of many positions and memory, we -%D can keep track of them. This mechanism is activated automatically based on -%D information collected in the previous pass. - -\newtoks \t_anch_positions_tracers -\newcount\c_anch_positions_paragraph - -\permanent\protected\def\tracepositions - {\the\t_anch_positions_tracers} - -\permanent\protected\def\enableparpositions % global - {\glet\registerparoptions\doregisterparoptions - \global\positioningtrue} - -\permanent\let\disableparpositions\relax - -\let\registerparoptions\relax - -\protected\def\doregisterparoptions - {\iftrialtypesetting \else - \ifinpagebody \else \ifmmode \else \ifinformula \else - \anch_positions_register_par_options - \fi \fi \fi - \fi} - -\def\anch_positions_register_par_options_normal - {\dontleavehmode\clf_parpos} - -\def\anch_positions_register_par_options_traced - {\anch_positions_register_par_options_normal - \smashedhbox to \zeropoint - {\hss - \startcolor[blue]% - \llap{\infofont\number\c_anch_positions_paragraph}% - \vrule - \s!width 4\onepoint - \s!height2\onepoint - \s!depth 2\onepoint - \stopcolor - \hss}} - -\let\anch_positions_register_par_options\anch_positions_register_par_options_normal - -\appendtoks - \let\anch_positions_register_par_options\anch_positions_register_par_options_traced -\to \t_anch_positions_tracers - -\protected\def\anch_positions_trace#1#2#3% - {\smashedhbox - {#1{\infofont#2#3}% - \kern-\onepoint - \vrule\s!width2\onepoint\s!height\halfapoint\s!depth\halfapoint}} - -\protected\def\anch_positions_trace_left_indeed - {\anch_positions_trace\llap\darkmagenta{\currentposition>}} - -\protected\def\anch_positions_trace_right_indeed - {\anch_positions_trace\rlap\darkcyan{<\currentposition}} - -\let\anch_positions_trace_left \relax -\let\anch_positions_trace_right\relax - -\appendtoks - \let\anch_positions_trace_left \anch_positions_trace_left_indeed - \let\anch_positions_trace_right \anch_positions_trace_right_indeed -\to \t_anch_positions_tracers - -% \appendtoks \registerparoptions \to \everypar - -%D \macros -%D {doifoverlappingelse} -%D -%D A first application of positional information, is to determine if two boxes do -%D overlap: -%D -%D \starttyping -%D \doifoverlappingelse{point a}{point b} -%D {action when overlapping} -%D {action when not overlapping} -%D \stoptyping - -% \doifelseoverlapping #1#2#3#4 % defined at lua end - -\aliased\let\doifoverlappingelse\doifelseoverlapping - -%D \macros -%D {doifpositionsonsamepageelse, -%D doifpositionsonthispageelse} -%D -%D Instead of letting the user handle fuzzy expansion, we provide a simple test on -%D positions being on the same page. -%D -%D \starttyping -%D \doifpositionsonsamepageelse{point a}{point b} -%D {action when on same page} -%D {action when not on same page} -%D \doifpositionsonthispageelse{point a}{point b} -%D {action when on this page} -%D {action when not on this page} -%D \stoptyping - -% \doifelsepositionsonsamepage #1 % defined at lua end -% \doifelsepositionsonthispage #1 % defined at lua end -% \doifelsepositionsused % defined at lua end - -\aliased\let\doifpositionsonsamepageelse\doifelsepositionsonsamepage -\aliased\let\doifpositionsonthispageelse\doifelsepositionsonthispage -\aliased\let\doifpositionsusedelse \doifelsepositionsused - -%D Moved here: - -\permanent\protected\def\savepos {\clf_savepos} -\permanent\protected\def\lastxpos{\numexpr\clf_lastxpos\relax} -\permanent\protected\def\lastypos{\numexpr\clf_lastypos\relax} - -\protect \endinput |