2018-12-19 18:57:00

30 files changed, 166 insertions, 5 deletions

diff --git a/doc/context/documents/general/qrcs/setup-cs.pdf b/doc/context/documents/general/qrcs/setup-cs.pdf
index 947261cef..222df2923 100644
--- a/doc/context/documents/general/qrcs/setup-cs.pdf
+++ b/doc/context/documents/general/qrcs/setup-cs.pdf
diff --git a/doc/context/documents/general/qrcs/setup-de.pdf b/doc/context/documents/general/qrcs/setup-de.pdf
index 5de089b7d..39840543d 100644
--- a/doc/context/documents/general/qrcs/setup-de.pdf
+++ b/doc/context/documents/general/qrcs/setup-de.pdf
diff --git a/doc/context/documents/general/qrcs/setup-en.pdf b/doc/context/documents/general/qrcs/setup-en.pdf
index 60550d0b5..972cfe4e4 100644
--- a/doc/context/documents/general/qrcs/setup-en.pdf
+++ b/doc/context/documents/general/qrcs/setup-en.pdf
diff --git a/doc/context/documents/general/qrcs/setup-fr.pdf b/doc/context/documents/general/qrcs/setup-fr.pdf
index 68d9cc43c..c0f0798d9 100644
--- a/doc/context/documents/general/qrcs/setup-fr.pdf
+++ b/doc/context/documents/general/qrcs/setup-fr.pdf
diff --git a/doc/context/documents/general/qrcs/setup-it.pdf b/doc/context/documents/general/qrcs/setup-it.pdf
index 05d4d4134..233bb2e86 100644
--- a/doc/context/documents/general/qrcs/setup-it.pdf
+++ b/doc/context/documents/general/qrcs/setup-it.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-cs.pdf b/doc/context/documents/general/qrcs/setup-mapping-cs.pdf
index 16b27e9f2..cf37e75cc 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-cs.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-cs.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-de.pdf b/doc/context/documents/general/qrcs/setup-mapping-de.pdf
index b0190452f..33c18fd59 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-de.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-de.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-en.pdf b/doc/context/documents/general/qrcs/setup-mapping-en.pdf
index d063a5e99..161f154e2 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-en.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-en.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-fr.pdf b/doc/context/documents/general/qrcs/setup-mapping-fr.pdf
index 60a2a42f2..6f8371a94 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-fr.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-fr.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-it.pdf b/doc/context/documents/general/qrcs/setup-mapping-it.pdf
index 79636a8b2..1f4230314 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-it.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-it.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-nl.pdf b/doc/context/documents/general/qrcs/setup-mapping-nl.pdf
index 3f47780c7..5a90a40ad 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-nl.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-nl.pdf
diff --git a/doc/context/documents/general/qrcs/setup-mapping-ro.pdf b/doc/context/documents/general/qrcs/setup-mapping-ro.pdf
index 82d6ad559..1ae4e35a3 100644
--- a/doc/context/documents/general/qrcs/setup-mapping-ro.pdf
+++ b/doc/context/documents/general/qrcs/setup-mapping-ro.pdf
diff --git a/doc/context/documents/general/qrcs/setup-nl.pdf b/doc/context/documents/general/qrcs/setup-nl.pdf
index 4ed9db5aa..96439c3fc 100644
--- a/doc/context/documents/general/qrcs/setup-nl.pdf
+++ b/doc/context/documents/general/qrcs/setup-nl.pdf
diff --git a/doc/context/documents/general/qrcs/setup-ro.pdf b/doc/context/documents/general/qrcs/setup-ro.pdf
index e6f08a7a0..409314986 100644
--- a/doc/context/documents/general/qrcs/setup-ro.pdf
+++ b/doc/context/documents/general/qrcs/setup-ro.pdf
diff --git a/doc/context/sources/general/manuals/math/math-input.tex b/doc/context/sources/general/manuals/math/math-input.tex
index d395e1865..9b14057d0 100644
--- a/doc/context/sources/general/manuals/math/math-input.tex
+++ b/doc/context/sources/general/manuals/math/math-input.tex
@@ -95,6 +95,36 @@ which gives:
 
 \stopsection
 
+\startsection [title=Scripts]
+
+With \UNICODE\ providing math symbols and a limited set of super- and subscripts,
+it made sense to add yet another feature. The scripts were already supported for
+a long time, but at some point on the mailing list sequential scripts were
+mentioned. So here is an example of both (some fonts, like the one used for
+verbatim, don't have all symbols but you get the idea anyway):
+
+\startbuffer
+\startformula
+    𝑷₂₀(0), ∀²𝑥⁰⁺²₂₀: 𝑷₂₀(𝑥⁰⁺²₂₀) ⇒ 𝑷₂₀(s(𝑥⁰⁺²₂₀)) ⊢ ∀¹𝑦⁰⁺¹₂₀ 𝑷₂₀(𝑦⁰⁺¹₂₀)
+\stopformula
+
+\startformula
+    \unstackscripts
+    𝑷₂₀(0), ∀²𝑥⁰⁺²₂₀: 𝑷₂₀(𝑥⁰⁺²₂₀) ⇒ 𝑷₂₀(s(𝑥⁰⁺²₂₀)) ⊢ ∀¹𝑦⁰⁺¹₂₀ 𝑷₂₀(𝑦⁰⁺¹₂₀)
+\stopformula
+\stopbuffer
+
+\typebuffer
+
+which renders the clueless formulas:
+
+\getbuffer
+
+The \type {\unstackscripts} macro triggers the unstacking of super and
+subscripts.
+
+\stopsection
+
 \stopchapter
 
 \stopcomponent
diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index 085361adc..38a56df30 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{2018.12.18 10:18}
+\newcontextversion{2018.12.19 18:48}
 
 %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 0d4efe32d..ba45fd7fd 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{2018.12.18 10:18}
+\edef\contextversion{2018.12.19 18:48}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index 288fadb55..fca09d204 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2018.12.18 10:18}
+\newcontextversion{2018.12.19 18:48}
 
 %D This file is loaded at runtime, thereby providing an excellent place for
 %D hacks, patches, extensions and new features.
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index 8f4755092..26a200599 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -42,7 +42,7 @@
 %D has to match \type {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2018.12.18 10:18}
+\edef\contextversion{2018.12.19 18:48}
 \edef\contextkind   {beta}
 
 %D For those who want to use this:
@@ -134,6 +134,8 @@
 \loadmkvifile{file-res}
 \loadmkvifile{file-lib}
 
+\doifelsefileexists{core-lmt.mkiv}{\loadmarkfile{core-lmt}}{}
+
 \loadmarkfile{supp-dir}
 
 \loadmarkfile{char-utf} % generic code (i.e. not much tex) ... could become unic-ini
diff --git a/tex/context/base/mkiv/core-lmt.lua b/tex/context/base/mkiv/core-lmt.lua
new file mode 100644
index 000000000..2f4f43116
--- /dev/null
+++ b/tex/context/base/mkiv/core-lmt.lua
@@ -0,0 +1,36 @@
+if not modules then modules = { } end modules ['core-lmt'] = {
+    version   = 1.001,
+    comment   = "companion to core-lmt.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local implement   = interfaces.implement
+local scankeyword = tokens.scanners.keyword
+
+local settextdir = tex.settextdir
+local setlinedir = tex.setlinedir
+local setpagedir = tex.setpagedir
+local setpardir  = tex.setpardir
+local setbodydir = tex.setbodydir
+local setboxdir  = tex.setboxdir
+
+local function scandir(what)
+    if scankeyword("tlt") then
+        what(0)
+    elseif scankeyword("trt") then
+        what(1)
+    elseif scankeyword("rtt") then
+        what(2)
+    elseif scankeyword("ltl") then
+        what(3)
+    end
+end
+
+implement { name = "textdir", public = true, protected = true, actions = function() scandir(settextdir) end }
+implement { name = "linedir", public = true, protected = true, actions = function() scandir(setlinedir) end }
+implement { name = "pagedir", public = true, protected = true, actions = function() scandir(setpagedir) end }
+implement { name = "pardir",  public = true, protected = true, actions = function() scandir(setpardir)  end }
+implement { name = "bodydir", public = true, protected = true, actions = function() scandir(setbodydir) end }
+implement { name = "boxdir",  public = true, protected = true, actions = function() scandir(setboxdir)  end }
diff --git a/tex/context/base/mkiv/core-lmt.mkiv b/tex/context/base/mkiv/core-lmt.mkiv
new file mode 100644
index 000000000..72199f854
--- /dev/null
+++ b/tex/context/base/mkiv/core-lmt.mkiv
@@ -0,0 +1,28 @@
+%D \module
+%D   [       file=core-lmt,
+%D        version=2010.08.2,
+%D          title=\CONTEXT\ System Macros,
+%D       subtitle=Primitives,
+%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 System Macros / Primitives}
+
+\registerctxluafile{core-lmt}{}
+
+\unprotect
+
+% nothing yet
+
+\protect \endinput
+
+% \starttext
+%     abc{\textdir TRTdef}ghi
+%     abc{\textdir trtdef}ghi
+%     \boxdirection0=1
+% \stoptext
diff --git a/tex/context/base/mkiv/math-ini.mkiv b/tex/context/base/mkiv/math-ini.mkiv
index ce0b37f4a..02fbf7db5 100644
--- a/tex/context/base/mkiv/math-ini.mkiv
+++ b/tex/context/base/mkiv/math-ini.mkiv
@@ -123,6 +123,7 @@
 \definesystemattribute[mathbidi]       [public]
 \definesystemattribute[mathdomain]     [public]
 \definesystemattribute[mathcollapsing] [public]
+\definesystemattribute[mathunstack]    [public]
 
 \definesystemattribute[displaymath]    [public]
 
@@ -2867,6 +2868,20 @@
 %     \let\b\math_b
 % \to \everymathematics
 
+%D Experiment
+
+\unexpanded\def\math_scripts_stack
+  {\mathunstackattribute\attributeunsetvalue}
+
+\unexpanded\def\math_scripts_unstack
+  {\clf_enablescriptunstacking
+   \mathunstackattribute\plusone}
+
+\appendtoks
+    \let\stackscripts  \math_scripts_stack
+    \let\unstackscripts\math_scripts_unstack
+\to \everymathematics
+
 \protect \endinput
 
 % % not used (yet)
diff --git a/tex/context/base/mkiv/math-noa.lua b/tex/context/base/mkiv/math-noa.lua
index 0ff189e06..5cf367fba 100644
--- a/tex/context/base/mkiv/math-noa.lua
+++ b/tex/context/base/mkiv/math-noa.lua
@@ -1114,6 +1114,18 @@ do
             setnext(stop_super)
         end
         if start_sub then
+
+--             if mode == "sub" then
+--                 local sup = getsup(pointer)
+--                 if sup and not getsub(pointer) then
+--                     local nxt = getnext(pointer)
+--                     local new = new_noad(pointer)
+--                     setnucleus(new,new_submlist())
+--                     setlink(pointer,new,nxt)
+--                     pointer = new
+--                 end
+--             end
+
             if start_sub == stop_sub then
                 setsub(pointer,getnucleus(start_sub))
             else
@@ -1140,6 +1152,42 @@ end
 
 do
 
+    local unstack = { }    noads.processors.unstack = unstack
+    local enabled = false
+
+    unstack[math_noad] = function(pointer,what,n,parent)
+        local sup = getsup(pointer)
+        local sub = getsub(pointer)
+        if sup and sub then
+            local nxt = getnext(pointer)
+            local new = new_noad(pointer)
+            setnucleus(new,new_submlist())
+            setsub(pointer)
+            setsub(new,sub)
+            setlink(pointer,new,nxt)
+        end
+    end
+
+    function handlers.unstack(head,style,penalties)
+        if enabled then
+            processnoads(head,unstack,"unstack")
+            return true -- not needed
+        end
+    end
+
+    implement {
+        name     = "enablescriptunstacking",
+        onlyonce = true,
+        actions  = function()
+            enableaction("math","noads.handlers.unstack")
+            enabled = true
+        end
+    }
+
+end
+
+do
+
     local function collected(list)
         if list and next(list) then
             local n, t = 0, { }
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index 9250cabc2..0a1fce1b6 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 a3280cc06..d7867f11e 100644
--- a/tex/context/base/mkiv/status-lua.pdf
+++ b/tex/context/base/mkiv/status-lua.pdf
diff --git a/tex/context/base/mkiv/task-ini.lua b/tex/context/base/mkiv/task-ini.lua
index 67a17109d..b7554c7cb 100644
--- a/tex/context/base/mkiv/task-ini.lua
+++ b/tex/context/base/mkiv/task-ini.lua
@@ -95,6 +95,7 @@ appendaction("shipouts",     "wrapup",      "luatex.synctex.collect",
 
 appendaction("math",         "normalizers", "noads.handlers.showtree",                          nil, "nonut",  "disabled"  )
 appendaction("math",         "normalizers", "noads.handlers.unscript",                          nil, "nonut",  "enabled"   )
+appendaction("math",         "normalizers", "noads.handlers.unstack",                           nil, "nonut",  "disabled"  )
 appendaction("math",         "normalizers", "noads.handlers.variants",                          nil, "nonut",  "enabled"   )
 appendaction("math",         "normalizers", "noads.handlers.relocate",                          nil, "nonut",  "enabled"   )
 appendaction("math",         "normalizers", "noads.handlers.families",                          nil, "nonut",  "enabled"   )
diff --git a/tex/context/interface/mkiv/i-context.pdf b/tex/context/interface/mkiv/i-context.pdf
index 60550d0b5..972cfe4e4 100644
--- a/tex/context/interface/mkiv/i-context.pdf
+++ b/tex/context/interface/mkiv/i-context.pdf
diff --git a/tex/context/interface/mkiv/i-readme.pdf b/tex/context/interface/mkiv/i-readme.pdf
index bbe47a8c6..7e88b757a 100644
--- a/tex/context/interface/mkiv/i-readme.pdf
+++ b/tex/context/interface/mkiv/i-readme.pdf
diff --git a/tex/context/modules/common/s-abbreviations-logos.tex b/tex/context/modules/common/s-abbreviations-logos.tex
index 8cc342cc4..00719a668 100644
--- a/tex/context/modules/common/s-abbreviations-logos.tex
+++ b/tex/context/modules/common/s-abbreviations-logos.tex
@@ -206,6 +206,7 @@
 \logo [OTEX]          {Oriental \TeXsuffix}
 \logo [OTF]           {otf}
 \logo [OTP]           {otp}
+\logo [OSX]           {os-x}
 \logo [OVF]           {ovf}
 \logo [PASCAL]        {Pascal}
 \logo [PCTEX]         {pc\TeXsuffix}
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index 274c4abcf..f0ca93b49 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  : 12/18/18 10:18:15
+-- merge date  : 12/19/18 18:48:37
 
 do -- begin closure to overcome local limits and interference