18 files changed, 63 insertions, 32 deletions
diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index e2f277db9..f46b8e473 100644
--- a/tex/context/base/mkii/cont-new.mkii
+++ b/tex/context/base/mkii/cont-new.mkii
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2023.05.27 23:23}
+\newcontextversion{2023.05.28 18:55}
 
 %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/mkii/context.mkii b/tex/context/base/mkii/context.mkii
index 459078b2f..50f3e71b3 100644
--- a/tex/context/base/mkii/context.mkii
+++ b/tex/context/base/mkii/context.mkii
@@ -20,7 +20,7 @@
 %D your styles an modules.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2023.05.27 23:23}
+\edef\contextversion{2023.05.28 18:55}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkii/mult-fr.mkii b/tex/context/base/mkii/mult-fr.mkii
index 6892458b6..fb98d0766 100644
--- a/tex/context/base/mkii/mult-fr.mkii
+++ b/tex/context/base/mkii/mult-fr.mkii
@@ -832,6 +832,7 @@
 \setinterfaceconstant{exitoffset}{decalagesortie}
 \setinterfaceconstant{expansion}{expansion}
 \setinterfaceconstant{export}{exporter}
+\setinterfaceconstant{extradata}{extradata}
 \setinterfaceconstant{extras}{extras}
 \setinterfaceconstant{factor}{facteur}
 \setinterfaceconstant{fallback}{repli}
@@ -955,6 +956,7 @@
 \setinterfaceconstant{lastpage}{dernierepage}
 \setinterfaceconstant{lastpagesep}{sepdernierepage}
 \setinterfaceconstant{lastpubsep}{sepdernierepub}
+\setinterfaceconstant{lasttextseparator}{lasttextseparator}
 \setinterfaceconstant{layout}{miseenpage}
 \setinterfaceconstant{left}{gauche}
 \setinterfaceconstant{leftclass}{leftclass}
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index b3ef836ce..6c34ef17a 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2023.05.27 23:23}
+\newcontextversion{2023.05.28 18:55}
 
 %D This file is loaded at runtime, thereby providing an excellent place for hacks,
 %D patches, extensions and new features. There can be local overloads in cont-loc
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index c564ee74c..d5f5241b4 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -49,7 +49,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2023.05.27 23:23}
+\edef\contextversion{2023.05.28 18:55}
 
 %D Kind of special:
 
diff --git a/tex/context/base/mkiv/mult-prm.lua b/tex/context/base/mkiv/mult-prm.lua
index cf83244cf..260a61949 100644
--- a/tex/context/base/mkiv/mult-prm.lua
+++ b/tex/context/base/mkiv/mult-prm.lua
@@ -659,6 +659,7 @@ return {
   "setmathspacing",
   "shapingpenaltiesmode",
   "shapingpenalty",
+  "shortinlinemaththreshold",
   "snapshotpar",
   "srule",
   "supmarkmode",
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index a3b95216b..852d7997a 100644
--- a/tex/context/base/mkiv/status-files.pdf
+++ b/tex/context/base/mkiv/status-files.pdf
diff --git a/tex/context/base/mkiv/status-lua.pdf b/tex/context/base/mkiv/status-lua.pdf
index 85a68d14d..6d9904ad2 100644
--- a/tex/context/base/mkiv/status-lua.pdf
+++ b/tex/context/base/mkiv/status-lua.pdf
diff --git a/tex/context/base/mkxl/cont-new.mkxl b/tex/context/base/mkxl/cont-new.mkxl
index 81d56e507..4e2817bed 100644
--- a/tex/context/base/mkxl/cont-new.mkxl
+++ b/tex/context/base/mkxl/cont-new.mkxl
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2023.05.27 23:23}
+\newcontextversion{2023.05.28 18:55}
 
 %D This file is loaded at runtime, thereby providing an excellent place for hacks,
 %D patches, extensions and new features. There can be local overloads in cont-loc
diff --git a/tex/context/base/mkxl/context.mkxl b/tex/context/base/mkxl/context.mkxl
index 74f8b3bfc..381453997 100644
--- a/tex/context/base/mkxl/context.mkxl
+++ b/tex/context/base/mkxl/context.mkxl
@@ -29,7 +29,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \immutable\edef\contextformat {\jobname}
-\immutable\edef\contextversion{2023.05.27 23:23}
+\immutable\edef\contextversion{2023.05.28 18:55}
 
 %overloadmode 1 % check frozen / warning
 %overloadmode 2 % check frozen / error
diff --git a/tex/context/base/mkxl/math-act.lmt b/tex/context/base/mkxl/math-act.lmt
index b0243719e..8fdd6ca5a 100644
--- a/tex/context/base/mkxl/math-act.lmt
+++ b/tex/context/base/mkxl/math-act.lmt
@@ -1190,6 +1190,21 @@ do
 
 end
 
+
+-- In TeX The Program we find in section 543 a remark about the second use of math
+-- italic: it is always added to the width except with respect to the position of
+-- the subscript. That paragraph also mentions that the number of different widths
+-- is normally small so they can be shared (there is an eight bit index into a width
+-- array). Actually the limits of at most 16 heights and depths has as side effect
+-- that we get some snapping of sizes. Now, because many math characters have an
+-- italic correction, the saving on shared widths is negated by the amount of (at
+-- most 64) italics. So in practice there is no gain and the italic correction could
+-- have served as bottom kern. We think that the following approach (that we actualy
+-- came to by a different reasonsing: inconsistent open type fonts) is quite valid
+-- and robust. It's just that the opentype math fonts should never have gone that
+-- TeX italic route. Italic usage is more clear from section 543 than from the math
+-- rendering code.
+
 do
 
      local function wipe(whatever,target,original,parameters,field,move,integrals)
diff --git a/tex/context/base/mkxl/math-ini.mkxl b/tex/context/base/mkxl/math-ini.mkxl
index eb3801a9b..b8c69b78c 100644
--- a/tex/context/base/mkxl/math-ini.mkxl
+++ b/tex/context/base/mkxl/math-ini.mkxl
@@ -534,6 +534,14 @@
 % \preinlinepenalty       23 \postinlinepenalty      56 x$xx$x\par x$x$x\par x$x^2$x\par x$!$x\par
 % \preshortinlinepenalty 123 \postshortinlinepenalty456 x$xx$x\par x$x$x\par x$x^2$x\par x$!$x\par
 
+% \immutable\integerdef\defaultpreshortinlinepenalty  150
+
+\preshortinlinepenalty 150
+
+\appendtoks
+    \shortinlinemaththreshold\emwidth
+\to \everybodyfont
+
 \setmathoptions\mathordinarycode\numexpr
     \noitaliccorrectionclassoptioncode
  % +\checkligatureclassoptioncode
@@ -638,6 +646,7 @@
    +\carryoverrighttopkernclassoptioncode
    +\carryoverrightbottomkernclassoptioncode
    +\preferdelimiterdimensionsclassoptioncode
+   +\shortinlineclassoptioncode
 \relax
 
 \setmathoptions\mathradicalcode\numexpr
@@ -648,11 +657,13 @@
    +\carryoverrighttopkernclassoptioncode
    +\carryoverrightbottomkernclassoptioncode
    +\preferdelimiterdimensionsclassoptioncode
+   +\shortinlineclassoptioncode
 \relax
 
 \setmathoptions\mathaccentcode\numexpr
     \defaultmathclassoptions
    +\autoinjectclassoptioncode
+   +\shortinlineclassoptioncode
 \relax
 
 % ord spacing but with support for \m{m^2/x__3}
diff --git a/tex/context/base/mkxl/math-spa.lmt b/tex/context/base/mkxl/math-spa.lmt
index 6cd3b467e..d068ed8e9 100644
--- a/tex/context/base/mkxl/math-spa.lmt
+++ b/tex/context/base/mkxl/math-spa.lmt
@@ -37,7 +37,7 @@ local getlist           = nuts.getlist
 local setglue           = nuts.setglue
 local setwhd            = nuts.setwhd
 local getdimensions     = nuts.dimensions
-local getnormalizedline = node.direct.getnormalizedline
+local getnormalizedline = nuts.getnormalizedline
 local getbox            = nuts.getbox
 local setoffsets        = nuts.setoffsets
 local addxoffset        = nuts.addxoffset
diff --git a/tex/context/base/mkxl/spac-brk.lmt b/tex/context/base/mkxl/spac-brk.lmt
index e534faa0e..fd32f7000 100644
--- a/tex/context/base/mkxl/spac-brk.lmt
+++ b/tex/context/base/mkxl/spac-brk.lmt
@@ -37,6 +37,7 @@ local nodecodes          = nodes.nodecodes
 local penalty_code       = nodecodes.penalty
 local glue_code          = nodecodes.glue
 local disc_code          = nodecodes.disc
+local kern_code          = nodecodes.kern
 local math_code          = nodecodes.math
 
 local breakcodes         = tex.breakcodes
diff --git a/tex/context/base/mkxl/spac-brk.mkxl b/tex/context/base/mkxl/spac-brk.mkxl
index 8926e1b4d..0ecff3577 100644
--- a/tex/context/base/mkxl/spac-brk.mkxl
+++ b/tex/context/base/mkxl/spac-brk.mkxl
@@ -19,25 +19,21 @@
 
 \registerctxluafile{spac-brk}{}
 
+\unprotect
+
 %D This is a very experimental feature and a by product of improving inline math
 %D crossing lines. As it might evolve: use with care.
 
-% \setuplayout[width=8cm]
 % \starttext
 %     \setupalign[verytolerant]
 %     \tracinglousiness1
 %   % \tracinglousiness2
-%     \samplefile{ward} \blank
-%   % \ctxlua{typesetters.breakpoints.show("11=0")}     \samplefile{ward} \blank
-%   % \ctxlua{typesetters.breakpoints.show{ [11] = 0 }} \samplefile{ward} \blank
-%     \lousiness 1 11 0                                 \samplefile{ward} \blank
-%     \silliness 11                                     \samplefile{ward} \blank
-%     {\tt \the\lousiness}
+%     \hsize8cm \lousiness 0      \samplefile{ward} \blank
+%     {\tt \the\lousiness} \blank
+%     \hsize8cm \lousiness 1 11 0 \samplefile{ward} \blank
+%     \hsize8cm \silliness   11   \samplefile{ward} \blank
 % \stoptext
 
-
-\unprotect
-
-% nothing hereyet
+%D These macros are defined a the \LUA\ end.
 
 \protect \endinput
diff --git a/tex/context/interface/mkii/keys-fr.xml b/tex/context/interface/mkii/keys-fr.xml
index e9794ab0b..db5ac7f88 100644
--- a/tex/context/interface/mkii/keys-fr.xml
+++ b/tex/context/interface/mkii/keys-fr.xml
@@ -838,6 +838,7 @@
 		<cd:constant name='exitoffset' value='decalagesortie'/>
 		<cd:constant name='expansion' value='expansion'/>
 		<cd:constant name='export' value='exporter'/>
+		<cd:constant name='extradata' value='extradata'/>
 		<cd:constant name='extras' value='extras'/>
 		<cd:constant name='factor' value='facteur'/>
 		<cd:constant name='fallback' value='repli'/>
@@ -961,6 +962,7 @@
 		<cd:constant name='lastpage' value='dernierepage'/>
 		<cd:constant name='lastpagesep' value='sepdernierepage'/>
 		<cd:constant name='lastpubsep' value='sepdernierepub'/>
+		<cd:constant name='lasttextseparator' value='lasttextseparator'/>
 		<cd:constant name='layout' value='miseenpage'/>
 		<cd:constant name='left' value='gauche'/>
 		<cd:constant name='leftclass' value='leftclass'/>
diff --git a/tex/context/sample/math/math-knuth-dt.tex b/tex/context/sample/math/math-knuth-dt.tex
index e32681437..7babcaf76 100644
--- a/tex/context/sample/math/math-knuth-dt.tex
+++ b/tex/context/sample/math/math-knuth-dt.tex
@@ -1,13 +1,16 @@
-{\bf 15.} (This procedure maintains four integers $(A, B, C, D)$ with the invariant meaning
-that \quotation{our remaining job is to output the continued fraction for $(Ay + B)/(Cy + D)$,
-where $y$ is the input yet to come.}) Initially set $j \leftarrow k \leftarrow 0$, $(A, B, C, D) \leftarrow (a, b, c, d)$;
-then input $x_j$ and set $(A, B, C, D) \leftarrow (Ax_j + B, A, Cx_j + D, C)$, $j \leftarrow j + 1$, one or
-more times until $C + D$ has the same sign as $C$. (When $j > 1$ and the input has not
-terminated, we know that $1 < y < \infty$; and when $C + D$ has the same sign as $C$ we
-know therefore that $(Ay + B)/(Cy + D)$ lies between $(A + B)/(C + D)$ and $A/C$.)
-Now comes the general step: If no integer lies strictly between $(A + B)/(C + D)$
-and $A/C$, output $X_k \leftarrow \lfloor A/C \rfloor$, and set $(A, B, C, D) \leftarrow (C, D, A - X_ k C, B - X_k D)$,
-$k \leftarrow k + 1$; otherwise input $x_j$ and set $(A, B,C, D) \leftarrow (Ax_j + B, A, Cx_j + D,C)$,
-$j \leftarrow j + 1$. The general step is repeated ad infinitum. However, if at any time the
-\emph{final} $x_j$ is input, the algorithm immediately switches gears: It outputs the continued
-fraction for $(Ax_j + B)/(Cx_j + D)$, using Euclid's algorithm, and terminates.
+{\bf 15.} (This procedure maintains four integers $(A, B, C, D)$ with the
+invariant meaning that \quotation{our remaining job is to output the continued
+fraction for $(Ay + B)/(Cy + D)$, where $y$ is the input yet to come.}) Initially
+set $j \leftarrow k \leftarrow 0$, $(A, B, C, D) \leftarrow (a, b, c, d)$; then
+input $x_j$ and set $(A, B, C, D) \leftarrow (Ax_j + B, A, Cx_j + D, C)$, $j
+\leftarrow j + 1$, one or more times until $C + D$ has the same sign as $C$.
+(When $j > 1$ and the input has not terminated, we know that $1 < y < \infty$;
+and when $C + D$ has the same sign as $C$ we know therefore that $(Ay + B)/(Cy +
+D)$ lies between $(A + B)/(C + D)$ and $A/C$.) Now comes the general step: If no
+integer lies strictly between $(A + B)/(C + D)$ and $A/C$, output $X_k \leftarrow
+\lfloor A/C \rfloor$, and set $(A, B, C, D) \leftarrow (C, D, A - X_ k C, B - X_k
+D)$, $k \leftarrow k + 1$; otherwise input $x_j$ and set $(A, B,C, D) \leftarrow
+(Ax_j + B, A, Cx_j + D,C)$, $j \leftarrow j + 1$. The general step is repeated ad
+infinitum. However, if at any time the \emph{final} $x_j$ is input, the algorithm
+immediately switches gears: It outputs the continued fraction for $(Ax_j +
+B)/(Cx_j + D)$, using Euclid's algorithm, and terminates.
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 3dfd09687..6df432862 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 : c:/data/develop/context/sources/luatex-fonts-merged.lua
 -- parent file : c:/data/develop/context/sources/luatex-fonts.lua
--- merge date  : 2023-05-27 23:23
+-- merge date  : 2023-05-28 18:55
 
 do -- begin closure to overcome local limits and interference