2018-05-19 21:51:00

17 files changed, 63 insertions, 4 deletions

diff --git a/doc/context/documents/general/manuals/luatex.pdf b/doc/context/documents/general/manuals/luatex.pdf
index 4647861ca..c1356861e 100644
--- a/doc/context/documents/general/manuals/luatex.pdf
+++ b/doc/context/documents/general/manuals/luatex.pdf
diff --git a/doc/context/documents/general/qrcs/setup-cs.pdf b/doc/context/documents/general/qrcs/setup-cs.pdf
index ea51f8d32..4029f33e1 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 1020b9988..8f1e05455 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 961c0092d..5668dc50a 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 45994e3fe..5cb02f21f 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 a88175184..c5a91fc81 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 4220dd12c..56979e73b 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 ba6d36620..cd4847cb4 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 fb4101bfb..cd1769541 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 46fcd7c73..79dfaf410 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 3d63dbe22..6efb09df6 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 678f8ae44..53d7fd6e5 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 164a0bb38..a3c1c127c 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 3b3bf52f8..112e23baf 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 eedc1126a..5793e971a 100644
--- a/doc/context/documents/general/qrcs/setup-ro.pdf
+++ b/doc/context/documents/general/qrcs/setup-ro.pdf
diff --git a/doc/context/presentations/examples/present-steps-001.tex b/doc/context/presentations/examples/present-steps-001.tex
index 65da31d6a..7a20779fb 100644
--- a/doc/context/presentations/examples/present-steps-001.tex
+++ b/doc/context/presentations/examples/present-steps-001.tex
@@ -38,9 +38,9 @@
 \startsteps
     \startstep
         \ifnum\currentstep > 1
-          \repeathead[chapter]
+            \repeathead[chapter]
         \else
-          \chapter{Step Set 1}
+            \chapter{Step Set 1}
         \fi
     \stopstep
 
@@ -65,11 +65,19 @@
 \startsteps
 
     \startstep[option=title]
-      \chapter{Step Set 2}
+        \chapter{Step Set 2}
     \stopstep
 
     \startstep[option=repeat]
-      \repeathead[chapter]
+        \repeathead[chapter]
+    \stopstep
+
+    \startstep[n=2]
+        this is a formula
+        \startformula
+            \startsubstep e =   \stopsubstep
+            \startsubstep m c^2 \stopsubstep
+        \stopformula
     \stopstep
 
     \startstep
@@ -79,6 +87,14 @@
         \stopitemize
     \stopstep
 
+    \startstep[n=2]
+        this is a formula
+        \startformula
+            \startsubstep e =   \stopsubstep
+            \startsubstep m c^2 \stopsubstep
+        \stopformula
+    \stopstep
+
     \startstep
         \startitemize[continue]
             \startitem STEP 2a \stopitem
diff --git a/doc/context/sources/general/manuals/luatex/luatex-math.tex b/doc/context/sources/general/manuals/luatex/luatex-math.tex
index 9f99c7ab3..821ef010d 100644
--- a/doc/context/sources/general/manuals/luatex/luatex-math.tex
+++ b/doc/context/sources/general/manuals/luatex/luatex-math.tex
@@ -1466,6 +1466,49 @@ use a step to control the size. A value of zero will suppress the gap. The step
 is divided by 1000 which is the usual way to mimmick floating point factors in
 \TEX.
 
+\subsection {Flattening: \lpr {mathflattenmode}}
+
+\topicindex {math+flattening}
+
+The \TEX\ math engine collapses \type {ord} noads without sub- and superscripts
+and a character as nucleus. and which has the side effect that in \OPENTYPE\ mode
+italic corrections are applied (given that they are enabled).
+
+\startbuffer[sample]
+\switchtobodyfont[modern]
+$V \mathbin{\mathbin{v}} V$\par
+$V \mathord{\mathord{v}} V$\par
+\stopbuffer
+
+\typebuffer[sample]
+
+This renders as:
+
+\blank \start \mathflattenmode\plusone \getbuffer[sample] \stop \blank
+
+When we set \lpr {mathflattenmode} to 31 we get:
+
+\blank \start \mathflattenmode\numexpr1+2+4+8+16\relax \getbuffer[sample] \stop \blank
+
+When you see no difference, then the font probably has the proper character
+dimensions and no italic correction is needed. For Latin Modern (at least till
+2018) there was a visual difference. In that respect this parameter is not always
+needed unless of course you want efficient math lists anyway.
+
+You can influence flattening by adding the appropriate number to the value of the
+mode parameter. The default value is~1.
+
+\starttabulate[|Tc|c|]
+\DB mode \BC class \NC \NR
+\TB
+\NC  1   \NC ord   \NC \NR
+\NC  2   \NC bin   \NC \NR
+\NC  4   \NC rel   \NC \NR
+\NC  8   \NC punct \NC \NR
+\NC 16   \NC inner \NC \NR
+\LL
+\stoptabulate
+
 \subsection {Tracing}
 
 \topicindex {math+tracing}