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if not modules then modules = { } end modules ['math-pre'] = {
version = 1.001,
optimize = true,
comment = "companion to math-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local type = type
local gmatch = string.gmatch
local h1 = table.swapped(tex.getmathparametervalues())
local h2 = table.swapped(tex.getmathstylenamevalues())
local axis = h1.axis
local getmath = tex.getmath
local setmath = tex.setmath
function setmathparameters(t)
if t then
for i=1,#t do
local ti = t[i]
local list = ti.list
local factor = ti.factor or 1
local styles = ti.styles
local value = ti.value
local unit = ti.unit
local function set(li,si,value)
if value then
setmath(li,si,value)
elseif factor == 0 then
setmath(li,si,0)
elseif unit == "axis" then
setmath(li,si,factor * getmath(axis,i))
else
setmath(li,si,factor * getmath(li,i))
end
end
for i=1,#list do
local li = h1[list[i]]
if li then
if styles == "all" then
for si=0,7 do
set(li,si,value)
end
elseif type(styles) == "string" then
local si = h2[styles]
if si then
set(li,si,value)
end
else
for s=1,#styles do
local si = h2[styles[s]]
if si then
set(li,si,value)
end
end
end
end
end
end
end
end
local stacklist = {
"fractionnumvgap",
"fractiondenomvgap",
"fractionnumup",
"fractiondenomdown",
"stackdenomdown",
"stacknumup",
"stackvgap",
}
local presets = {
less = {
{
factor = .5,
-- factor = 0,
-- value = 655360,
-- unit = "axis",
list = stacklist,
-- styles = { "display" },
-- styles = "display",
styles = "all"
},
},
more = {
{
factor = 2,
list = stacklist,
styles = "all"
},
},
zero = {
{
factor = 0,
list = stacklist,
styles = "all"
},
},
}
mathematics.presets = presets
function mathematics.preset(list)
for s in gmatch(list,"[%S,]+") do
setmathparameters(presets[s])
end
end
interfaces.implement {
name = "presetmathematics",
public = true,
protected = true,
arguments = "optional",
actions = mathematics.preset,
}
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