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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/context/documents/general/manuals/luatex.pdf | bin | 1017376 -> 1023946 bytes | |||
| -rw-r--r-- | doc/context/sources/general/manuals/luatex/luatex-libraries.tex | 17 | ||||
| -rw-r--r-- | doc/context/sources/general/manuals/luatex/luatex-nodes.tex | 56 | ||||
| -rw-r--r-- | doc/context/sources/general/manuals/luatex/luatex-titlepage.tex | 3 | ||||
| -rw-r--r-- | doc/context/sources/general/manuals/luatex/luatex.tex | 3 |
5 files changed, 57 insertions, 22 deletions
diff --git a/doc/context/documents/general/manuals/luatex.pdf b/doc/context/documents/general/manuals/luatex.pdf Binary files differindex 81a7c42b9..760995ea8 100644 --- a/doc/context/documents/general/manuals/luatex.pdf +++ b/doc/context/documents/general/manuals/luatex.pdf diff --git a/doc/context/sources/general/manuals/luatex/luatex-libraries.tex b/doc/context/sources/general/manuals/luatex/luatex-libraries.tex index 71d14040b..df81bcea4 100644 --- a/doc/context/sources/general/manuals/luatex/luatex-libraries.tex +++ b/doc/context/sources/general/manuals/luatex/luatex-libraries.tex @@ -5266,8 +5266,8 @@ registers: \startfunctioncall tex.setskip (<number> n, <node> s) tex.setskip (<string> s, <node> s) -tex.setskip ('global',<number> n, <node> s) -tex.setskip ('global',<string> s, <node> s) +tex.setskip ("global",<number> n, <node> s) +tex.setskip ("global",<string> s, <node> s) <node> s = tex.getskip (<number> n) <node> s = tex.getskip (<string> s) \stopfunctioncall @@ -5285,6 +5285,19 @@ tex.scantoks("global",0,"$\int\limits^1_2$") In the function-based interface, it is possible to define values globally by using the string \type {global} as the first function argument. +There are four extra skip related helpers: + +\startfunctioncall +tex.setglue (<number> n, width, stretch, shrink, stretch_order, shrink_order) +tex.setglue (<string> s, width, stretch, shrink, stretch_order, shrink_order) +tex.setglue ("global",<number> n, width, stretch, shrink, stretch_order, shrink_order) +tex.setglue ("global",<string> s, width, stretch, shrink, stretch_order, shrink_order) +width, stretch, shrink, stretch_order, shrink_order = tex.getglue (<number> n) +width, stretch, shrink, stretch_order, shrink_order = tex.getglue (<string> s) +\stopfunctioncall + +The other two are \type {tex.setmuglue} and \type {tex.getmuglue}. + \subsection{Character code registers} \TEX's character code tables (\type {\lccode}, \type {\uccode}, \type {\sfcode}, \type diff --git a/doc/context/sources/general/manuals/luatex/luatex-nodes.tex b/doc/context/sources/general/manuals/luatex/luatex-nodes.tex index 9b67b1f61..a48e2f267 100644 --- a/doc/context/sources/general/manuals/luatex/luatex-nodes.tex +++ b/doc/context/sources/general/manuals/luatex/luatex-nodes.tex @@ -198,10 +198,14 @@ Id: \showid{ins} \NC depth \NC number \NC \NC \NR \NC head/list \NC \syntax{<node>} \NC the first node of the body of this insert \NC \NR -\NC spec \NC \syntax{<node>} \NC a pointer to the \type {\splittopskip} - glue spec \NC \NR +%NC spec \NC \syntax{<node>} \NC a pointer to the \type {\splittopskip} +% glue spec \NC \NR \stoptabulate +There is a set of extra fields that concern the associated glue: \type {width}, +\type {stretch}, \type {stretch_order}, \type {shrink} and \type {shrink_order}. +These are all numbers. + A warning: never assign a node list to the \type {head} field unless you are sure its internal link structure is correct, otherwise an error may be result. You can use \type {list} instead (often in functions you want to use local variable swith similar @@ -279,6 +283,10 @@ Id: \showid{math} \NC surround \NC number \NC width of the \type {\mathsurround} kern \NC \NR \stoptabulate +There is a set of extra fields that concern the associated glue: \type {width}, +\type {stretch}, \type {stretch_order}, \type {shrink} and \type {shrink_order}. +These are all numbers. + \subsubsection{glue nodes} Skips are about the only type of data objects in traditional \TEX\ that are not a @@ -292,9 +300,6 @@ called a \type {glue_spec}, and it has the following accessible fields: \NC stretch_order \NC number \NC \NC \NR \NC shrink \NC number \NC \NC \NR \NC shrink_order \NC number \NC \NC \NR -\NC writable \NC boolean \NC If this is true, you can't assign to this - \type {glue_spec} because it is one of the - preallocated special cases. \NC \NR \stoptabulate % These objects are reference counted, so there is actually an extra read|-|only @@ -309,26 +314,41 @@ the content fit in the available space. The \type {effective_glue} function that takes a glue node and a parent (hlist or vlist) returns the effective width of that glue item. -A spec node is normally references to from a glue node: +A gluespec node is a special kind of node that is used for storing a set of glue +values in registers. Originally they were also used to store properties of glue +nodes (using a system of reference counts) but we now keep these properties in +the glue nodes themselves, which gives a cleaner interface to \LUA. + +The indirect spec approach was in fact an optimization in the original \TEX\ +code. First of all it can save quite some memory because all these spaces that +become glue now share the same specification (only the reference count is +incremented), and zero testing is also a bit faster because only the pointer has +to be checked (this is no longer true for engines that implement for instance +protrusion where we really need to ensure that zero is zero when we test for +bounds). Another side effect is that glue specifications are read|-|only, so in +the end copies need to be made when they are used from \LUA\ (each assignment to +a field can result in a new copy). So in the end the advantages of sharing are +not that high (and nowadays memory is less an issue, also given that a glue node +is only a few memory words larger than a spec). Valid fields: \showfields{glue}\crlf Id: \showid{glue} \starttabulate[|lT|l|p|] -\NC \ssbf field \NC \bf type \NC \bf explanation \NC \NR -\NC subtype \NC number \NC \type {0} = \type {\skip}, - \type {1-18} = internal glue parameters, - \type {100-103} = \quote {leader} subtypes \NC \NR -\NC attr \NC \syntax{<node>} \NC \NC \NR -\NC spec \NC \syntax{<node>} \NC pointer to a glue_spec item \NC \NR -\NC leader \NC \syntax{<node>} \NC pointer to a box or rule for leaders \NC \NR +\NC \ssbf field \NC \bf type \NC \bf explanation \NC \NR +\NC subtype \NC number \NC \type {0} = \type {\skip}, + \type {1-18} = internal glue parameters, + \type {98-99} = \quote {math glue} subtypes + \type {100-103} = \quote {leader} subtypes \NC \NR +\NC attr \NC \syntax{<node>} \NC \NC \NR +\NC leader \NC \syntax{<node>} \NC pointer to a box or rule for leaders \NC \NR +\NC width \NC number \NC \NC \NR +\NC stretch \NC number \NC \NC \NR +\NC stretch_order \NC number \NC \NC \NR +\NC shrink \NC number \NC \NC \NR +\NC shrink_order \NC number \NC \NC \NR \stoptabulate -The indirect spec approach is an optimization in the original \TEX\ code. First -of all it saves quite some memory because all these spaces that become glue now -share the same specification, and zero testing is also faster because only the -pointer has to be checked. - The exact meanings of the subtypes are as follows: \starttabulate[|rT|l|] diff --git a/doc/context/sources/general/manuals/luatex/luatex-titlepage.tex b/doc/context/sources/general/manuals/luatex/luatex-titlepage.tex index 20c22160d..8ab56f85d 100644 --- a/doc/context/sources/general/manuals/luatex/luatex-titlepage.tex +++ b/doc/context/sources/general/manuals/luatex/luatex-titlepage.tex @@ -32,7 +32,8 @@ [align=flushright, foregroundcolor=blue, frame=off] - {\currentdate[month,space,year]\par + {\doifsomething{\documentvariable{status}}{\documentvariable{status}\par} + \currentdate[month,space,year]\par Version \documentvariable{version}} \stopstandardmakeup diff --git a/doc/context/sources/general/manuals/luatex/luatex.tex b/doc/context/sources/general/manuals/luatex/luatex.tex index 5dea07094..dd5bfac7c 100644 --- a/doc/context/sources/general/manuals/luatex/luatex.tex +++ b/doc/context/sources/general/manuals/luatex/luatex.tex @@ -9,7 +9,8 @@ \dontcomplain \startdocument - [version=0.90.0] + [version=0.95.0, + status=Experimental] \component luatex-titlepage |