beta 2012.02.18 10:50

18 files changed, 185 insertions, 377 deletions

diff --git a/tex/context/base/anch-bck.mkvi b/tex/context/base/anch-bck.mkvi
index cc796edef..677d5e2ea 100644
--- a/tex/context/base/anch-bck.mkvi
+++ b/tex/context/base/anch-bck.mkvi
@@ -67,10 +67,10 @@
 
 \newcount\MPparcounter
 
-\def\MPself        {\MPvar{self}}
-\def\MPbself       {b:\MPvar{self}}
-\def\MPeself       {e:\MPvar{self}}
-\def\MPparanchor   {p:\number\MPparcounter}
+\def\MPself     {\MPvar{self}}
+\def\MPbself    {b:\MPvar{self}}
+\def\MPeself    {e:\MPvar{self}}
+\def\MPparanchor{p:\number\MPparcounter}
 
 % \carryoverpar is needed for left/right floats
 
@@ -512,6 +512,10 @@
     endfor ;
 \stopuseMPgraphic
 
+\setuptextbackground
+  [\c!mp=mpos:par:region,
+   \c!method=mpos:par:region]
+
 %D \starttyping
 %D \setupbackground
 %D   [test]
@@ -591,15 +595,6 @@
 
 \protect \endinput
 
-% todo 1: shift down option
-
-% \startuseMPgraphic{mpos:par:columnset}
-%   \iftracepositions show_multi_pars \else draw_multi_pars \fi ;
-%   path p ; p := boundingbox currentpicture ;
-%   currentpicture := currentpicture shifted (0,-StrutDepth/2) ;
-%   setbounds currentpicture to p ;
-% \stopuseMPgraphic
-
 \definetextbackground[underline]    [location=text,alternative=1,background=,frame=off]
 \definetextbackground[overstrike]   [location=text,alternative=2,background=,frame=off]
 \definetextbackground[exlines]      [location=text,alternative=3,background=,frame=off]
diff --git a/tex/context/base/anch-pgr.lua b/tex/context/base/anch-pgr.lua
index 6b7ce13be..7ab341b63 100644
--- a/tex/context/base/anch-pgr.lua
+++ b/tex/context/base/anch-pgr.lua
@@ -6,6 +6,8 @@ if not modules then modules = { } end modules ['anch-pgr'] = {
     license   = "see context related readme files"
 }
 
+-- todo: we need to clean up lists (of previous pages)
+
 local format = string.format
 local concat, sort = table.concat, table.sort
 local splitter = lpeg.splitat(":")
@@ -15,6 +17,10 @@ local jobpositions = job.positions
 
 local report_graphics = logs.reporter("graphics")
 
+local function point(n)
+    return format("%.5fpt",n/65536)
+end
+
 local function pair(x,y)
     return format("(%.5fpt,%.5fpt)",x/65536,y/65536)
 end
@@ -36,10 +42,33 @@ local function regionarea(r)
     }
 end
 
-local function add(t,x,y)
-    local last = t[#t]
-    if not last or last[1] ~= x or last[2] ~= y then
-        t[#t+1] = { x, y }
+-- we can use a 'local t, n' and reuse the table
+
+local function add(t,x,y,last)
+    local n = #t
+    if n == 0 then
+        t[n+1] = { x, y }
+    elseif n == 1 then
+        local tn = t[1]
+        if tn[1] ~= x or tn[2] ~= y then
+            t[n+1] = { x, y }
+        end
+    else
+        local tm = t[n-1]
+        local tn = t[n]
+        local lx = tn[1]
+        local ly = tn[2]
+        if lx == tm[1] and lx == x then
+            if ly ~= y then
+                tn[2] = y
+            end
+        elseif ly == tm[2] and ly == y then
+            if lx ~= x then
+                tn[1] = x
+            end
+        elseif not last then
+            t[n+1] = { x, y }
+        end
     end
 end
 
@@ -208,6 +237,7 @@ local function singlepart(b,e,r,left,right)
             add(area,li[1],li[2]-ry)
         end
         add(area,bx,bd-ry)
+        add(area,bx,bh-ry,true) -- finish last straight line (but no add as we cycle)
         for i=1,#area do
             local a = area[i]
             area[i] = pair(a[1],a[2])
@@ -244,6 +274,7 @@ local function firstpart(b,r,left,right)
         add(area,li[1],li[2]-ry)
     end
     add(area,bx,bd-ry)
+    add(area,bx,bh-ry,true) -- finish last straight line (but no add as we cycle)
     for i=1,#area do
         local a = area[i]
         area[i] = pair(a[1],a[2])
@@ -380,11 +411,13 @@ local function calculate(tag)
     --
     if bindex == eindex then
         return {
-            [b.p] = { singlepart(b,e,collected[br],left,right) }
+            list = { [b.p] = { singlepart(b,e,collected[br],left,right) } },
+            bpos = b,
+            epos = e,
         }
     else
-        local pars = {
-            [b.p] = { firstpart(b,collected[br],left,right) }
+        local list = {
+            [b.p] = { firstpart(b,collected[br],left,right) },
         }
         for i=bindex+1,eindex-1 do
             br = format("%s:%s",btag,i)
@@ -393,51 +426,55 @@ local function calculate(tag)
                report_graphics("invalid middle for '%s'",br)
             else
                 local p = r.p
-                local pp = pars[p]
+                local pp = list[p]
                 if pp then
                     pp[#pp+1] = middlepart(r,left,right)
                 else
-                    pars[p] = { middlepart(r,left,right) }
+                    list[p] = { middlepart(r,left,right) }
                 end
             end
         end
         local p = e.p
-        local pp = pars[p]
+        local pp = list[p]
         if pp then
             pp[#pp+1] = lastpart(e,collected[er],left,right)
         else
-            pars[p] = { lastpart(e,collected[er],left,right) }
-        end
-        return pars
-    end
-end
-
-local pending = { } -- needs gc
-
-local function register(data,n,anchor)
-    local pa = pending[anchor]
-    if not pa then
-        pa = { }
-        pending[anchor] = pa
-    end
-    for page, pagedata in next, data do
-        local pap = pa[page]
-        if pap then
-            pap[#pap+1] = n
-        else
-            pa[page] = { n }
+            list[p] = { lastpart(e,collected[er],left,right) }
         end
+        return {
+            list = list,
+            bpos = b,
+            epos = e,
+        }
     end
 end
 
-function graphics.backgrounds.registered(anchor,page)
-    local pa = pending[anchor]
-    if pa then
-        concat(pa,",")
-    else
-        return ""
-    end
-end
+-- local pending = { } -- needs gc
+--
+-- local function register(data,n,anchor)
+--     local pa = pending[anchor]
+--     if not pa then
+--         pa = { }
+--         pending[anchor] = pa
+--     end
+--     for page, pagedata in next, data do
+--         local pap = pa[page]
+--         if pap then
+--             pap[#pap+1] = n
+--         else
+--             pa[page] = { n }
+--         end
+--     end
+-- end
+--
+-- function graphics.backgrounds.registered(anchor,page)
+--     local pa = pending[anchor]
+--     if pa then
+--         concat(pa,",")
+--     else
+--         return ""
+--     end
+-- end
 
 local pbg = { } -- will move to pending
 
@@ -460,6 +497,10 @@ string multikind[] ;
 numeric multilocs[], nofmultipars ;
 nofmultipars := %s ;
 multibox := unitsquare xyscaled %s ;
+numeric par_strut_height, par_strut_depth, par_line_height ;
+par_strut_height := %s ;
+par_strut_depth := %s ;
+par_line_height := %s ;
 ]]
 
 local template_b = [[
@@ -481,10 +522,10 @@ function graphics.backgrounds.fetch(n,page,anchor)
     if not data then
         data = calculate(n)
         pbg[n] = data -- can be replaced by register
-        register(data,n,anchor)
+     -- register(data.list,n,anchor)
     end
     if data then
-        local pagedata = data[page]
+        local pagedata = data.list[page]
         if pagedata then
             local nofmultipars = #pagedata
 --             report_graphics("fetching '%s' at page %s using anchor '%s' containing %s multipars",n,page,anchor,nofmultipars)
@@ -494,7 +535,9 @@ function graphics.backgrounds.fetch(n,page,anchor)
             else
                 local trace = false
                 local x, y, w, h, d = a.x, a.y, a.w, a.h, a.d
-                local result = { format(template_a,nofmultipars,pair(w,h+d)) }
+                local bpos = data.bpos
+                local bh, bd = bpos.h, bpos.d
+                local result = { format(template_a,nofmultipars,pair(w,h+d),point(bh),point(bd),point(bh+bd)) }
                 for i=1,nofmultipars do
                     local region = pagedata[i]
                     result[#result+1] = format(template_b,
diff --git a/tex/context/base/anch-pos.lua b/tex/context/base/anch-pos.lua
index ff7b3ca7b..bc062161d 100644
--- a/tex/context/base/anch-pos.lua
+++ b/tex/context/base/anch-pos.lua
@@ -244,6 +244,8 @@ jobpositions.setall = setall
 jobpositions.set    = set
 jobpositions.get    = get
 
+commands.setpos     = setall
+
 -- will become private table (could also become attribute driven but too nasty
 -- as attributes can bleed e.g. in margin stuff)
 
diff --git a/tex/context/base/anch-pos.mkiv b/tex/context/base/anch-pos.mkiv
index c29c98e5b..3341d40c4 100644
--- a/tex/context/base/anch-pos.mkiv
+++ b/tex/context/base/anch-pos.mkiv
@@ -11,108 +11,30 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-% needs a cleanup, things may change; we also need to move the mp
-% related code to meta-pos
-
-% shorter tags, ..:achtergrond:.. etc in pos actions
-% dubbele text- * pos's eruit
-
-% class pos -> als gelijk aan vorige, dan niet niet definieren
-% en erven, maw:
-%
-% 1 -> opslaan
-% 2 -> undef, dus == prev
-% 3 -> undef, dus == prev
-% 4 -> opslaan
-
 \writestatus{loading}{ConTeXt Anchoring Macros / Positioning}
 
-%D In \MKIV\ there was already a different housekeeping model
-%D for positions quite early, but starting in 2012 more dramatic
-%D changes started to happen, especially in relation to background
-%D graphics. It will probably take some time to settle.
-
-% saveposition     : tag page x y
-% savepositionwhd  : tag page x y w h d
-% savepositionplus : tag page x y w h d list
-%
-% at some point (when we no longer share code) we will move to numbers
-% do that we have less garbage collection and hashing
-%
-% the global table _ptbs_ is equivalent to job.positions.tobesaved
-% the global table _pcol_ is equivalent to job.positions.collected
-%
-% btw, using a function is more efficient than passing longer code
-% snippets to ctxlua
+%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}{1.001}
 
-% todo: topskip als optie voor eerste regel achtergrond
-% todo: build pos layers on top of layers
-% todo: positionlayer pos van text-1 etc delen
-
-%D Although \TEX\ has a rather powerful channel to the outside
-%D world, called \type {\special}, real communication with
-%D other programs is complicated by the fact that no positional
-%D information is available. Mid 1999, I discussed this with
-%D \THANH, the author of \PDFTEX, and after some experiments,
-%D \PDFTEX\ was extended with a simple but effective mechanism,
-%D that provided positional information. The interesting
-%D thought is that, although \TEX\ is frozen, similar
-%D functionality could have been achieved with \type
-%D {\specials} and an additional \DVI\ postprocessor.
-%D
-%D Since we want to be as compatible as can be, \CONTEXT\ will
-%D support both methods, although the development is primarily
-%D driven by the \PDFTEX\ way of doing things. Since the
-%D mechanism is basically not limited to one application, for
-%D the moment we stick to building the functionality around one
-%D \CONTEXT\ special command, but at the same time we keep our
-%D eyes open for extensions in other directions.
-%D
-%D A question that may arise when one reads this module, is to
-%D what extend these macros are generic, in the sense that they
-%D could be collected in a support module instead of a core
-%D module. Since the mechanism described here will closely
-%D cooperate with the \METAPOST\ support built in \CONTEXT,
-%D which in turn will be tightly integrated with the \CONTEXT\
-%D overlay mechanisms, I decided to write a core module instead
-%D of a support one. This makes even more sense, when one takes
-%D into account that this kind of support depends on special
-%D drivers.
-
 \unprotect
 
-%D The first application of positional information was embedded
-%D graphics. Since we are interacting with text, it made sense
-%D to take the current line height and depth into account too.
-%D This is why we have two basic position macros: one for
-%D simple positions, and one for boxes.
-%D
-%D We could have sticked to one special, and actually did so in
-%D earlier experiments, but for convenience, as well for
-%D clearness, we now have two alternatives. This approach will
-%D save us quite some bytes when storing large quantities of
-%D positional information. We save as less information as
-%D needed, that is, we save no dimensions, in a \METAPOST\
-%D friendly way.
-%D
-%D The three specials involved are:
+%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 \dosetpositionpapersize {width} {height}
 %D \stoptyping
 
-\def\dosaveposition            #1#2#3#4{\normalexpanded{\ctxlua    {_plib_.setall("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4)}}}
-\def\dosavepositionwhd   #1#2#3#4#5#6#7{\normalexpanded{\ctxlua    {_plib_.setall("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4,\number\dimexpr#5,\number\dimexpr#6,\number\dimexpr#7)}}}
-\def\dosavepositionplus#1#2#3#4#5#6#7#8{\normalexpanded{\ctxlua    {_plib_.setall("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4,\number\dimexpr#5,\number\dimexpr#6,\number\dimexpr#7,"#8")}}}
-
-% \def\dosetposition                   #1{\normalexpanded{\ctxlatelua{_plib_.setdim("#1")}}}
-% \def\dosetpositionwhd          #1#2#3#4{\normalexpanded{\ctxlatelua{_plib_.setdim("#1",\number\dimexpr#2,\number\dimexpr#3,\number\dimexpr#4)}}}
-% \def\dosetpositionplus       #1#2#3#4#5{\normalexpanded{\ctxlatelua{_plib_.setdim("#1",\number\dimexpr#2,\number\dimexpr#3,\number\dimexpr#4,"#5")}}}
+\def\dosaveposition            #1#2#3#4{\ctxcommand{setpos("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4)}}
+\def\dosavepositionwhd   #1#2#3#4#5#6#7{\ctxcommand{setpos("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4,\number\dimexpr#5,\number\dimexpr#6,\number\dimexpr#7)}}
+\def\dosavepositionplus#1#2#3#4#5#6#7#8{\ctxcommand{setpos("#1",\number#2,\number\dimexpr#3,\number\dimexpr#4,\number\dimexpr#5,\number\dimexpr#6,\number\dimexpr#7,"#8")}}
 
 \def\dosetposition            #1{\ctxcommand{posxy("#1")}}
 \def\dosetpositionwhd   #1#2#3#4{\ctxcommand{poswhd("#1",\number\dimexpr#2,\number\dimexpr#3,\number\dimexpr#4)}}
@@ -120,40 +42,26 @@
 \def\dosetpositionbox       #1#2{\ctxcommand{poswhd("#1",\number\wd#2,\number\ht#2,\number\dp#2)}}
 \def\dosetpositionstrut       #1{\ctxcommand{posstrut("#1")}}
 
-\let\dosetpositionpapersize\gobbletwoarguments
-
 \newbox\positionbox
 \newif \ifpositioning
 
-\def\POSprefix{POS::}
-
-%D This is real tricky! The page anchor is applied to the
-%D page box and therefore flushed first. So, when present, it
-%D is applied to all positions except itself.
-
-% 0 = don't relocate page origin  1 = relocate page origin once
-
-\setnewconstant\positionanchormode\plusone % not used
-
 %D Sometimes we want to trick the position handler a bit:
 
 \def\replacepospxywhd#1#2#3#4#5#6#7%
   {\ctxcommand{replacepospxywhd('#1',\number#2,\number\dimexpr#3,\number\dimexpr#4,\number\dimexpr#5,\number\dimexpr#6,\number\dimexpr#7)}}
 
-%D The next switch can be used to communicate a special
-%D situation. Positioning and associated actions can be
-%D executed any time. However, in for instance backgrounds
-%D they can be collected in a layer, for instance the text
-%D layer (especially the hidden text layer). In the case of
-%D floats, we run into problems, since the page information is
-%D not applicable when the content floats indeed. In such
-%D situations one can treat positions and graphics local.
+%D The next switch can be used to communicate a special situation. Positioning and
+%D associated actions can be executed any time. However, in for instance backgrounds
+%D they can be collected in a layer, for instance the text layer (especially the
+%D hidden text layer). In the case of floats, we run into problems, since the page
+%D information is not applicable when the content floats indeed. In such situations
+%D one can treat positions and graphics local.
 
 \newif\iflocalpositioning  % todo: conditional
 \newif\ifregionpositioning % todo: conditional
 
-%D Watch out: sometimes a pagebreak occurs inside a float
-%D placement, so there we need to disable local mode.
+%D Watch out: sometimes a pagebreak occurs inside a float placement, so there we need
+%D to disable local mode.
 
 \appendtoks
     \localpositioningtrue
@@ -165,32 +73,30 @@
 \to \everybeforepagebody
 
 %D \macros
-%D   {MPp, MPx, MPy, MPw, MPh, MPd,
-%D    MPxy, MPll, MPlr, MPur, MPul, MPpos,MPanchor}
+%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
-%D with short names that are clearly meant for \METAPOST\ but
-%D nowadays also used for other purposes.
-
-\def\MPp  #1{\ctxcommand{MPp("#1")}}     \let\MPpage     \MPp
-\def\MPr  #1{\ctxcommand{MPr("#1")}}     \let\MPregion   \MPr
-\def\MPc  #1{\ctxcommand{MPc("#1")}}     \let\MPcolumn   \MPc
-\def\MPn  #1{\ctxcommand{MPn("#1")}}     \let\MPparagraph\MPn
-\def\MPx  #1{\ctxcommand{MPx("#1")}}
-\def\MPy  #1{\ctxcommand{MPy("#1")}}
-\def\MPw  #1{\ctxcommand{MPw("#1")}}     % first we need to replace \MPwidth etc
-\def\MPh  #1{\ctxcommand{MPh("#1")}}
-\def\MPd  #1{\ctxcommand{MPd("#1")}}
-\def\MPxy #1{\ctxcommand{MPxy("#1")}}
-\def\MPll #1{\ctxcommand{MPll("#1")}}
-\def\MPlr #1{\ctxcommand{MPlr("#1")}}
-\def\MPur #1{\ctxcommand{MPur("#1")}}
-\def\MPul #1{\ctxcommand{MPul("#1")}}
-\def\MPpos#1{\ctxcommand{MPpos("#1")}}    \let\MPanchor\MPpos  % overloaded locally when needed
-\def\MPe  #1{\ctxcommand{MPe("#1")}}
-
-\def\MPls #1{\ctxcommand{MPls("#1")}}     \let\MPleftskip\MPls % compatible feature
-\def\MPrs #1{\ctxcommand{MPrs("#1")}}     \let\MPrightkip\MPrs % compatible feature
+%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.
+
+\def\MPp      #1{\ctxcommand{MPp("#1")}}     \let\MPpage     \MPp
+\def\MPr      #1{\ctxcommand{MPr("#1")}}     \let\MPregion   \MPr
+\def\MPc      #1{\ctxcommand{MPc("#1")}}     \let\MPcolumn   \MPc
+\def\MPn      #1{\ctxcommand{MPn("#1")}}     \let\MPparagraph\MPn
+\def\MPx      #1{\ctxcommand{MPx("#1")}}
+\def\MPy      #1{\ctxcommand{MPy("#1")}}
+\def\MPw      #1{\ctxcommand{MPw("#1")}}     % first we need to replace \MPwidth etc
+\def\MPh      #1{\ctxcommand{MPh("#1")}}
+\def\MPd      #1{\ctxcommand{MPd("#1")}}
+\def\MPxy     #1{\ctxcommand{MPxy("#1")}}
+\def\MPll     #1{\ctxcommand{MPll("#1")}}
+\def\MPlr     #1{\ctxcommand{MPlr("#1")}}
+\def\MPur     #1{\ctxcommand{MPur("#1")}}
+\def\MPul     #1{\ctxcommand{MPul("#1")}}
+\def\MPpos    #1{\ctxcommand{MPpos("#1")}}    \let\MPanchor\MPpos  % overloaded locally when needed
+\def\MPe      #1{\ctxcommand{MPe("#1")}}
+
+\def\MPls     #1{\ctxcommand{MPls("#1")}}     \let\MPleftskip\MPls % compatible feature
+\def\MPrs     #1{\ctxcommand{MPrs("#1")}}     \let\MPrightkip\MPrs % compatible feature
 
 \def\MPpardata#1{\ctxcommand{MPpardata("#1")}}
 \def\MPxywhd  #1{\ctxcommand{MPxywhd("#1")}}
@@ -198,10 +104,9 @@
 %D \macros
 %D  {MPplus, MPrest, MPv, MPvv}
 %D
-%D Since we will probably keep on extending, we provide a
-%D general extension macro. The plus alternative takes an
-%D extra argument, denoting what additional parameter to pick
-%D up. So, the third extra is fetched with,
+%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}
@@ -218,16 +123,14 @@
 \def\MPplus#1#2#3{\ctxcommand{MPplus("#1",#2,"#3")}}  \let\MPv \MPplus
 \def\MPrest  #1#2{\ctxcommand{MPrest("#1","#2")}}     \let\MPvv\MPrest
 
-%D There are two low level positioning macros. Both store the
-%D position as well as execute an action associated with that
-%D position.
+%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
-     \dosetpositionpapersize\printpaperwidth\printpaperheight
    \fi}
 
 \unexpanded\def\setpositiononly
@@ -406,9 +309,8 @@
 
 \def\copyposition#1#2{\ctxcommand{copyposition('#1','#2')}}
 
-%D The fact that handling positions is a two pass operation, is
-%D one of the reasons why we need to be able to test for
-%D existence, using:
+%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}
@@ -417,50 +319,39 @@
 \def\doifpositionelse#1{\ctxcommand{doifpositionelse('#1')}}
 \def\doifposition    #1{\ctxcommand{doifposition('#1')}}
 
-%D We have now arrived at a few macros that would make sense as
-%D support macros, but ended up in the core.
-
 %D \macros
 %D   {xypos}
 %D
-%D We have several macros available to save positions. Later
-%D we will see applications.
+%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 {\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 \NC \type {\fpos}  \NC f: \NC begin point in a paragraph \NC \NR
-%D \NC \type {\tpos}  \NC t: \NC end point in a paragraph \NC \NR
 %D \stoptabulate
 %D
 %D Each macro takes an identifier as argument, and the \type
 %D {\hpos} and \type {\vpos} also expect box content.
 
-% \def\xypos{\anch_positions_initialize\dosetposition}
-
 \let\xypos\setpositiononly
 
-\unexpanded\def\hpos #1{\dontleavehmode\setpositionbox{#1}\hbox}
-\unexpanded\def\vpos #1{\setpositionbox{#1}\vbox}
+\unexpanded\def\hpos#1{\dontleavehmode\setpositionbox{#1}\hbox}
+\unexpanded\def\vpos#1{\setpositionbox{#1}\vbox}
+\unexpanded\def\bpos#1{\dontleavehmode      \setpositionstrut{b:#1}\ignorespaces}
+\unexpanded\def\epos#1{\removeunwantedspaces\setpositionstrut{e:#1}}
 
-\unexpanded\def\bpos #1{\dontleavehmode      \setpositionstrut{b:#1}\ignorespaces}
-\unexpanded\def\epos #1{\removeunwantedspaces\setpositionstrut{e:#1}}
-
-%D When we want to calculate more complex backgrounds, we
-%D need to know what the current indentation scheme is. At
-%D the cost of many positions and memory, we can keep track
-%D of them. This mechanism is activated automatically
-%D based on information collected in the previous pass.
+%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.
 
 \newcount\parposcounter
 \newif   \ifpositioningpar
 \newif   \iftracepositions
 
-% we can check for used entries, and if not, then not add one
-
 \unexpanded\def\enableparpositions % global
   {\global\let\registerparoptions\doregisterparoptions
    \global\positioningtrue
@@ -478,14 +369,6 @@
      \fi \fi \fi
    \fi}
 
-% \def\anch_positions_register_par_options
-%   {\global\advance\parposcounter\plusone
-%    \setpositiondataplus
-%      {p:\number\parposcounter}\zeropoint\strutht\strutdp
-%      {\the\hsize,\the\dimexpr\leftskip\relax,\the\dimexpr\rightskip\relax,\the\hangindent,\the\hangafter,\the\parindent}%
-%   %\hbox{\registerparsymbol}%
-%    \iftracepositions\registerparsymbol\fi}
-
 \def\anch_positions_register_par_options
   {\dontleavehmode\ctxcommand{parpos()}%
    \iftracepositions\registerparsymbol\fi}
@@ -514,130 +397,11 @@
 
 % \appendtoks \registerparoptions \to \everypar
 
-%D Eperimental code, don't use this yet: (must be sped up anyway) .. obsolete
-
-\def\@@noden{node:n:}
-\def\@@nodeo{node:o:}
-\def\@@nodep{node:p:}
-
-\def\doifelsenodelocation#1%
-  {\ifcsname\@@noden#1\endcsname
-     \expandafter\firstoftwoarguments
-   \else
-     \expandafter\secondoftwoarguments
-   \fi}
-
-\def\nextnodelocation#1%
-  {\ifcsname\@@noden#1\endcsname\pluscounter{\@@noden#1}\fi}
-
-\def\newnodelocation#1%
-  {\ifcsname\@@noden#1\endcsname
-     \setcounter{\@@noden#1}\zerocount
-     \letgvalue {\@@nodeo#1}\!!zerocount
-   \fi}
-
-\def\tagnodelocation#1%
-  {\ifcsname\@@noden#1\endcsname\xypos{\@@nodep#1:\countervalue{\@@noden#1}}\fi}
-
-\def\getnodelocationp#1{\MPp{\@@nodep#1:\countervalue{\@@noden#1}}}
-\def\getnodelocationx#1{\MPx{\@@nodep#1:\countervalue{\@@noden#1}}}
-\def\getnodelocationy#1{\MPy{\@@nodep#1:\countervalue{\@@noden#1}}}
-
-\def\numnodelocationp#1#2{\MPp{\@@nodep#1:\number#2}}
-\def\numnodelocationx#1#2{\MPx{\@@nodep#1:\number#2}}
-\def\numnodelocationy#1#2{\MPy{\@@nodep#1:\number#2}}
-
-\def\getnodelocationn#1{\countervalue{\@@noden#1}}
-\def\getnodelocationo#1{\getvalue    {\@@nodeo#1}}
-
-\setnewconstant\nodelocationmode\plusone
-
-\def\analyzenodelocation#1%
-  {\ifcsname\@@noden#1\endcsname
-     \anch_positions_node_location_analyze{#1}{\getnodelocationn{#1}}\zerocount
-   \fi}
-
-\def\anch_positions_node_location_analyze#1#2#3% class n default
-  {\begingroup
-   \donefalse
-   \ifcase\nodelocationmode
-     % do nothing
-   \else
-     \edef\nodelocationselfn{#2}%
-     \edef\nodelocationselfp{\numnodelocationp{#1}\nodelocationselfn}%
-     \edef\nodelocationselfx{\numnodelocationx{#1}\nodelocationselfn}%
-     \edef\nodelocationselfy{\numnodelocationy{#1}\nodelocationselfn}%
-     \scratchcounter\plusone
-     \doloop
-       {\ifnum\recurselevel=\nodelocationselfn\relax
-          \donetrue
-        \else
-          \edef\nodelocationotherp{\numnodelocationp{#1}\recurselevel}%
-          \edef\nodelocationotherx{\numnodelocationx{#1}\recurselevel}%
-          \edef\nodelocationothery{\numnodelocationy{#1}\recurselevel}%
-          \ifcase\nodelocationmode
-            % \exitloop
-          \or
-            % ok for single column
-            \anch_positions_node_location_analyze_one
-          \or
-            % acceptable for double column
-            \anch_positions_node_location_analyze_two
-          \else
-            \exitloop
-          \fi
-        \fi}%
-   \fi
-   \ifdone \else
-     \scratchcounter#3\relax
-   \fi
-   \setxvalue{\@@nodeo#1}{\the\scratchcounter}%
-   \endgroup}
-
-\def\anch_positions_node_location_analyze_one
-  {\ifcase\nodelocationotherp\relax
-     \exitloop
-   \else\ifnum\nodelocationotherp<\nodelocationselfp\relax
-     \donetrue \advance\scratchcounter\plusone
-   \else\ifnum\nodelocationotherp>\nodelocationselfp\relax
-     % skip
-   \else\ifdim\nodelocationothery>\nodelocationselfy\relax
-     \donetrue \advance\scratchcounter\plusone
-   \else\ifdim\nodelocationothery<\nodelocationselfy\relax
-     % skip
-   \else\ifdim\nodelocationotherx<\nodelocationselfx\relax
-     \donetrue \advance\scratchcounter\plusone
-   \fi\fi\fi\fi\fi\fi}
-
-\def\anch_positions_node_location_analyze_two
-  {\ifcase\nodelocationotherp\relax
-     \exitloop
-   \else\ifnum\nodelocationotherp<\nodelocationselfp\relax
-     \donetrue \advance\scratchcounter\plusone
-   \else\ifnum\nodelocationotherp>\nodelocationselfp\relax
-     % skip
-   \else\ifnum\recurselevel>\nodelocationselfn\relax
-     \donetrue \exitloop
-   \else
-     \donetrue \advance\scratchcounter\plusone
-   \fi\fi\fi\fi}
-
-\unexpanded\def\shownodelocation#1%
-  {\ifcsname\@@noden#1\endcsname
-    \analyzenodelocation{#1}%
-     (#1,%
-      n:\getnodelocationn{#1},%
-      p:\getnodelocationp{#1},%
-      x:\getnodelocationx{#1},%
-      y:\getnodelocationy{#1},%
-      o:\getnodelocationo{#1})%
-   \fi}
-
 %D \macros
 %D   {doifoverlappingelse}
 %D
-%D A first application of positional information, is to
-%D determine if two boxes do overlap:
+%D A first application of positional information, is to determine if two
+%D boxes do overlap:
 %D
 %D \starttyping
 %D \doifoverlappingelse{point a}{point b}
@@ -651,8 +415,8 @@
 %D   {doifpositionsonsamepageelse,
 %D    doifpositionsonthispageelse}
 %D
-%D Instead of letting the user handle fuzzy expansion, we
-%D provide a simple test on positions being on the same page.
+%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}
@@ -666,12 +430,4 @@
 \def\doifpositionsonsamepageelse#1{\ctxcommand{doifpositionsonsamepageelse("#1")}}
 \def\doifpositionsonthispageelse#1{\ctxcommand{doifpositionsonthispageelse("#1")}}
 
-%D \macros
-%D   {POSp, POSx, POSy, POSh, POSd, POSw}
-%D
-%D This is obsolete in \MKIV:
-
-\let\POSp\MPp \let\POSx\MPx \let\POSy\MPy
-\let\POSh\MPh \let\POSd\MPd \let\POSw\MPw
-
 \protect \endinput
diff --git a/tex/context/base/cont-new.mkii b/tex/context/base/cont-new.mkii
index 6446020e8..c045890b2 100644
--- a/tex/context/base/cont-new.mkii
+++ b/tex/context/base/cont-new.mkii
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2012.02.17 18:52}
+\newcontextversion{2012.02.18 10:50}
 
 %D This file is loaded at runtime, thereby providing an
 %D excellent place for hacks, patches, extensions and new
diff --git a/tex/context/base/cont-new.mkiv b/tex/context/base/cont-new.mkiv
index 68ad069c4..dc19402c2 100644
--- a/tex/context/base/cont-new.mkiv
+++ b/tex/context/base/cont-new.mkiv
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2012.02.17 18:52}
+\newcontextversion{2012.02.18 10:50}
 
 %D This file is loaded at runtime, thereby providing an
 %D excellent place for hacks, patches, extensions and new
diff --git a/tex/context/base/context-version.pdf b/tex/context/base/context-version.pdf
index 4c0eba78e..b5e4d1d07 100644
--- a/tex/context/base/context-version.pdf
+++ b/tex/context/base/context-version.pdf
diff --git a/tex/context/base/context-version.png b/tex/context/base/context-version.png
index 0024ab229..7db14f01e 100644
--- a/tex/context/base/context-version.png
+++ b/tex/context/base/context-version.png
diff --git a/tex/context/base/context.mkii b/tex/context/base/context.mkii
index 3edaefddf..9bd21ba7a 100644
--- a/tex/context/base/context.mkii
+++ b/tex/context/base/context.mkii
@@ -20,7 +20,7 @@
 %D your styles an modules.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2012.02.17 18:52}
+\edef\contextversion{2012.02.18 10:50}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/context.mkiv b/tex/context/base/context.mkiv
index bdbba20a2..5bfa6e61e 100644
--- a/tex/context/base/context.mkiv
+++ b/tex/context/base/context.mkiv
@@ -23,7 +23,7 @@
 %D up and the dependencies are more consistent.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2012.02.17 18:52}
+\edef\contextversion{2012.02.18 10:50}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/font-otn.lua b/tex/context/base/font-otn.lua
index 1e552d35a..edef853de 100644
--- a/tex/context/base/font-otn.lua
+++ b/tex/context/base/font-otn.lua
@@ -730,9 +730,11 @@ function handlers.gpos_mark2mark(start,kind,lookupname,markanchors,sequence)
     local markchar = start.char
     if marks[markchar] then
         local base = start.prev -- [glyph] [basemark] [start=mark]
-while base and has_attribute(base,markdone) and has_attribute(base,markdone) ~= has_attribute(start,markdone) do
-    base = base.prev -- KE: prevents mknk fo rmarks on different components of a ligature
-end
+        -- new
+        while base and has_attribute(base,markdone) and has_attribute(base,markdone) ~= has_attribute(start,markdone) do
+            base = base.prev -- KE: prevents mknk fo rmarks on different components of a ligature
+        end
+        --
         if base and base.id == glyph_code and base.subtype<256 and base.font == currentfont then -- subtype test can go
             local basechar = base.char
             local baseanchors = descriptions[basechar]
diff --git a/tex/context/base/mlib-pps.mkiv b/tex/context/base/mlib-pps.mkiv
index a9b2e6e70..b233f7b08 100644
--- a/tex/context/base/mlib-pps.mkiv
+++ b/tex/context/base/mlib-pps.mkiv
@@ -98,7 +98,7 @@
 %D \typebuffer \startlinecorrection \getbuffer \stoplinecorrection
 
 \def\MPLIBpositionwhd#1#2#3#4#5% bp !
-  {\dosavepositionwhd{#1}{0}{#2bp}{#3bp}{#4bp}{#5bp}{0bp}}
+  {\dosavepositionwhd{#1}\zerocount{#2\onebasepoint}{#3\onebasepoint}{#4\onebasepoint}{#5\onebasepoint}\zeropoint}
 
 \def\MPLIBextrapass#1%
   {\ctxlua{metapost.graphic_extra_pass("#1")}}
diff --git a/tex/context/base/page-lin.mkiv b/tex/context/base/page-lin.mkiv
index f43839441..7b1cbcd94 100644
--- a/tex/context/base/page-lin.mkiv
+++ b/tex/context/base/page-lin.mkiv
@@ -13,6 +13,8 @@
 
 % generic or not ... maybe not bother too much and simplify to mkiv only
 % get rid of \mk* (left over from experimental times)
+%
+% to be redone (was experiment) .. can be hooked into margin code
 
 \writestatus{loading}{ConTeXt Core Macros / Line Numbering}
 
@@ -68,7 +70,7 @@
   {\setbox\linenumberscratchbox\vbox
      {\forgetall
       \offinterlineskip
-      \ctxlua{nodes.lines.boxed.stage_one(\number#1,\ifcase\linenumbernesting false\else true\fi)}}%
+      \ctxlua{nodes.lines.boxed.stage_one(\number#1,\ifcase\linenumbernesting false\else true\fi)}}% #2
    \ctxlua{nodes.lines.boxed.stage_two(\number#1,\number\linenumberscratchbox)}}% can move to lua code
 
 % id nr shift width leftskip dir
@@ -264,7 +266,7 @@
    \the\aftereverylinenumbering
    \endgroup}
 
-% number placement
+% number placement .. will change into (the new) margin code
 
 \def\mkdoinnerlinenumber{\doifoddpageelse\mkdoleftlinenumber\mkdorightlinenumber}
 \def\mkdoouterlinenumber{\doifoddpageelse\mkdorightlinenumber\mkdoleftlinenumber}
diff --git a/tex/context/base/status-files.pdf b/tex/context/base/status-files.pdf
index 73a12ab77..ed4110d93 100644
--- a/tex/context/base/status-files.pdf
+++ b/tex/context/base/status-files.pdf
diff --git a/tex/context/base/status-lua.pdf b/tex/context/base/status-lua.pdf
index 5a5fda95d..e886b982d 100644
--- a/tex/context/base/status-lua.pdf
+++ b/tex/context/base/status-lua.pdf
diff --git a/tex/context/base/tabl-tsp.mkiv b/tex/context/base/tabl-tsp.mkiv
index f230346bd..21182a988 100644
--- a/tex/context/base/tabl-tsp.mkiv
+++ b/tex/context/base/tabl-tsp.mkiv
@@ -113,7 +113,7 @@
   {\forgetall
    \dontcomplain
    \global\settrue\splitfloatdone
-   \nodelocationmode\zerocount % bypass auto-renumbering
+ % \nodelocationmode\zerocount % bypass auto-renumbering
    \global\advance\noffloatssplits\plusone
    \ifcase\noffloatssplits\relax \or
      \ifconditional\onlyonesplitofffloat
diff --git a/tex/context/base/typo-mar.lua b/tex/context/base/typo-mar.lua
index 00747a585..45cab0f71 100644
--- a/tex/context/base/typo-mar.lua
+++ b/tex/context/base/typo-mar.lua
@@ -656,6 +656,8 @@ local function flushinline(parent,head)
     return head, done, continue
 end
 
+local a_linenumber = attributes.private('linenumber')
+
 local function flushed(scope,parent) -- current is hlist
     local head = parent.list
     local done = false
@@ -689,7 +691,11 @@ local function flushed(scope,parent) -- current is hlist
         done = done or don
     end
     if done then
+local a = has_attribute(head,a_linenumber) -- hack .. we need a more decent critical attribute inheritance mechanism
         parent.list = hpack_nodes(head,parent.width,"exactly")
+if a then
+    set_attribute(parent.list,a_linenumber,a)
+end
      -- resetstacked()
     end
     return done, continue
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 0966cd3b8..d85a0f4a3 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : luatex-fonts-merged.lua
 -- parent file : luatex-fonts.lua
--- merge date  : 02/17/12 18:52:08
+-- merge date  : 02/18/12 10:50:58
 
 do -- begin closure to overcome local limits and interference
 
@@ -9295,9 +9295,11 @@ function handlers.gpos_mark2mark(start,kind,lookupname,markanchors,sequence)
     local markchar = start.char
     if marks[markchar] then
         local base = start.prev -- [glyph] [basemark] [start=mark]
-while base and has_attribute(base,markdone) and has_attribute(base,markdone) ~= has_attribute(start,markdone) do
-    base = base.prev -- KE: prevents mknk fo rmarks on different components of a ligature
-end
+        -- new
+        while base and has_attribute(base,markdone) and has_attribute(base,markdone) ~= has_attribute(start,markdone) do
+            base = base.prev -- KE: prevents mknk fo rmarks on different components of a ligature
+        end
+        --
         if base and base.id == glyph_code and base.subtype<256 and base.font == currentfont then -- subtype test can go
             local basechar = base.char
             local baseanchors = descriptions[basechar]