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if not modules then modules = { } end modules ['math-frc'] = {
version = 1.001,
comment = "companion to math-frc.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local utfchar = utf.char
local context = context
local variables = interfaces.variables
local v_no = variables.no
local v_yes = variables.yes
local resolved = {
[0x007B] = "\\{",
[0x007D] = "\\}",
}
table.setmetatableindex(resolved, function(t,k)
local v = utfchar(k)
t[k] = v
return v
end)
local ctx_normalatop = context.normalatop
local ctx_normalover = context.normalover
local function mathfraction(how,left,right,width)
if how == v_no then
if left == 0x002E and right == 0x002E then
ctx_normalatop()
else
context("\\atopwithdelims%s%s",resolved[left],resolved[right])
end
elseif how == v_yes then
if left == 0x002E and right == 0x002E then
context("\\normalabove%ssp",width)
else
context("\\abovewithdelims%s%s%ssp",resolved[left],resolved[right],width)
end
else -- v_auto
if left == 0x002E and right == 0x002E then
ctx_normalover()
else
context("\\overwithdelims%s%s",resolved[left],resolved[right])
end
end
end
interfaces.implement {
name = "mathfraction",
actions = mathfraction,
arguments = { "string", "number", "number", "dimen" }
}
-- experimental code in lmtx
if CONTEXTLMTXMODE > 0 then
local ctx_normalUatop = context.normalUatop
local ctx_normalUover = context.normalUover
local function umathfraction(how,left,right,width)
if how == v_no then
if left == 0x002E and right == 0x002E then
ctx_normalUatop()
else
context("\\Uatopwithdelims%s%s",resolved[left],resolved[right])
end
elseif how == v_yes then
if left == 0x002E and right == 0x002E then
context("\\normalUabove%ssp",width)
else
context("\\Uabovewithdelims%s%s%ssp",resolved[left],resolved[right],width)
end
else -- v_auto
if left == 0x002E and right == 0x002E then
ctx_normalUover()
else
context("\\Uoverwithdelims%s%s",resolved[left],resolved[right])
end
end
end
interfaces.implement {
name = "umathfraction",
actions = umathfraction,
arguments = { "string", "number", "number", "dimen" }
}
end
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