zauguin/mathml
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Better embellished operator handling

Browse Source
This commit is contained in:
Marcel Fabian Krüger 2021-04-23 07:50:21 +02:00
parent d6bda3aff3
commit c0a1f60962
2 changed files with 65 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

107
luamml-convert.lua
View File

@ -24,11 +24,20 @@ local digit_map = {["0"] = true, ["1"] = true,
["5"] = true, ["6"] = true, ["7"] = true,
["8"] = true, ["9"] = true,}
-- Two marker tables. They are used instead of an embellished operator to mark space-like or user provided constructs
local user_provided, space_like = {}, {}
local nodes_to_table
local function sub_style(s) return s//4*2+5 end
local function sup_style(s) return s//4*2+4+s%2 end
-- The _to_table functions generally return a second argument which is
-- could be (if it were a <mo>) a core operator of the embellishe operator
-- or space_like/user_provided
-- The delim_to_table and acc_to_table are special since their return value should
-- always be considered a core operator
-- We ignore large_... since they aren't used for modern fonts
local function delim_to_table(delim)
if not delim then return end
@ -59,19 +68,21 @@ end
local function kernel_to_table(kernel, cur_style)
if not kernel then return end
local props = properties[kernel] props = props and props.mathml_table
if props then return props end
if props then return props, user_provided end
local id = kernel.id
if id == math_char_t then
local fam = kernel.fam
local char = remap_lookup[fam << 21 | kernel.char]
local elem = digit_map[char] and 'mn' or 'mi'
return {[0] = elem,
local result = {[0] = elem,
char,
['tex:family'] = fam ~= 0 and fam or nil,
mathvariant = #char == 1 and utf8.codepoint(char) < 0x10000 and 'normal' or nil
}
return result, result
elseif id == sub_box_t then
return {[0] = 'mi', {[0] = 'mglyph', ['tex:box'] = kernel.list}}
local result = {[0] = 'mi', {[0] = 'mglyph', ['tex:box'] = kernel.list}}
return result, result
elseif id == sub_mlist_t then
return nodes_to_table(kernel.list, cur_style)
else
@ -79,34 +90,34 @@ local function kernel_to_table(kernel, cur_style)
end
end
local function do_sub_sup(t, n, cur_style)
local function do_sub_sup(t, core, n, cur_style)
local sub = kernel_to_table(n.sub, sub_style(cur_style))
local sup = kernel_to_table(n.sup, sup_style(cur_style))
if sub then
if sup then
return {[0] = 'msubsup', t, sub, sup}
return {[0] = 'msubsup', t, sub, sup}, core
else
return {[0] = 'msub', t, sub}
return {[0] = 'msub', t, sub}, core
end
elseif sup then
return {[0] = 'msup', t, sup}
return {[0] = 'msup', t, sup}, core
else
return t
return t, core
end
end
local function noad_to_table(noad, sub, cur_style)
local class = noad_sub[sub]
local nucleus = kernel_to_table(noad.nucleus, class == 'over' and cur_style//2*2+1 or cur_style)
local nucleus, core = kernel_to_table(noad.nucleus, class == 'over' and cur_style//2*2+1 or cur_style)
if class == 'ord' then
elseif class == 'opdisplaylimits' or class == 'oplimits' or class == 'opnolimits' or class == 'bin' or class == 'rel' or class == 'open'
or class == 'close' or class == 'punct' or class == 'inner' then
if nucleus[0] == 'mrow' then
if not core or not core[0] then
-- TODO
else
nucleus[0] = 'mo'
if stretchy[nucleus[1]] then nucleus.stretchy = false end
if nucleus.mathvariant == 'normal' then nucleus.mathvariant = nil end
core[0] = 'mo'
if stretchy[core[1]] then core.stretchy = false end
if core.mathvariant == 'normal' then core.mathvariant = nil end
end
nucleus['tex:class'] = class
@ -118,35 +129,35 @@ local function noad_to_table(noad, sub, cur_style)
nucleus,
sub or sup,
sub and sup,
}
}, core
end
elseif class == 'under' then
return {[0] = 'munder',
nucleus,
{[0] = 'mo', '_',},
}
}, core
elseif class == 'over' then
return {[0] = 'mover',
nucleus,
{[0] = 'mo', '\u{203E}',},
}
}, core
elseif class == 'vcenter' then
nucleus['tex:TODO'] = class
else
error[[confusion]]
end
return do_sub_sup(nucleus, noad, cur_style)
return do_sub_sup(nucleus, core, noad, cur_style)
end
local function accent_to_table(accent, sub, cur_style)
local nucleus = kernel_to_table(accent.nucleus, cur_style//2*2+1)
local nucleus, core = kernel_to_table(accent.nucleus, cur_style//2*2+1)
local top_acc = acc_to_table(accent.accent, cur_style, sub & 1 == 1)
local bot_acc = acc_to_table(accent.bot_accent, cur_style, sub & 2 == 2)
return {[0] = top_acc and (bot_acc and 'munderover' or 'mover') or 'munder',
nucleus,
bot_acc or top_acc,
bot_acc and top_acc,
}
}, core
end
local style_table = {
@ -163,19 +174,19 @@ style_table.crampedscript, style_table.crampedscriptscript =
local function radical_to_table(radical, sub, cur_style)
local kind = radical_sub[sub]
local nucleus = kernel_to_table(radical.nucleus, cur_style//2*2+1)
local nucleus, core = kernel_to_table(radical.nucleus, cur_style//2*2+1)
local left = delim_to_table(radical.left)
local elem
if kind == 'radical' or kind == 'uradical' then
-- FIXME: Check that this is really a square root
elem = {[0] = 'msqrt', nucleus}
elem, core = {[0] = 'msqrt', nucleus}, nil
elseif kind == 'uroot' then
-- FIXME: Check that this is really a root
elem = {[0] = 'msqrt', nucleus, kernel_to_table(radical.degree)}
elem, core = {[0] = 'msqrt', nucleus, kernel_to_table(radical.degree)}, nil
elseif kind == 'uunderdelimiter' then
elem = {[0] = 'munder', left, nucleus}
elem, core = {[0] = 'munder', left, nucleus}, left
elseif kind == 'uoverdelimiter' then
elem = {[0] = 'mover', left, nucleus}
elem, core = {[0] = 'mover', left, nucleus}, left
elseif kind == 'udelimiterunder' then
elem = {[0] = 'munder', nucleus, left}
elseif kind == 'udelimiterover' then
@ -183,11 +194,11 @@ local function radical_to_table(radical, sub, cur_style)
else
error[[confusion]]
end
return do_sub_sup(elem, radical, cur_style)
return do_sub_sup(elem, core, radical, cur_style)
end
local function fraction_to_table(fraction, sub, cur_style)
local num = kernel_to_table(fraction.num, sup_style(cur_style))
local num, core = kernel_to_table(fraction.num, sup_style(cur_style))
local denom = kernel_to_table(fraction.denom, sub_style(cur_style))
local left = delim_to_table(fraction.left)
local right = delim_to_table(fraction.right)
@ -209,23 +220,24 @@ local function fraction_to_table(fraction, sub, cur_style)
right,
}
else
return mfrac
return mfrac, core
end
end
local function fence_to_table(fence, sub, cur_style)
local delim = delim_to_table(fence.delimiter)
delim.fence = 'true'
return delim
return delim, delim
end
local function space_to_table(amount, sub, cur_style)
if amount == 0 then return end
-- FIXME: What does MathML do in subscripts etc.? Probably we have to "unscale" in the non mu case...
if sub == 99 then -- TODO magic number
return {[0] = 'mspace', width = string.format("%.2fem", amount/18)}
-- 18*2^16=1179648
return {[0] = 'mspace', width = string.format("%.2fem", amount/1179648)}, space_like
else
return {[0] = 'mspace', width = string.format("%.2fem", amount/tex.sp'1em')}
-- 65781.76=tex.sp'100bp'/100
return {[0] = 'mspace', width = string.format("%.2fpt", amount/65781.76)}, space_like
end
end
@ -233,14 +245,16 @@ function nodes_to_table(head, cur_style)
local t = {[0] = "mrow"}
local result = t
local nonscript
local core = space_like
for n, id, sub in node.traverse(head) do
local new_core
local props = properties[n] props = props and props.mathml_table
if props then
t[#t+1] = props
t[#t+1], new_core = props, user_provided
elseif id == noad_t then
t[#t+1] = noad_to_table(n, sub, cur_style)
t[#t+1], new_core = noad_to_table(n, sub, cur_style)
elseif id == accent_t then
t[#t+1] = accent_to_table(n, sub, cur_style)
t[#t+1], new_core = accent_to_table(n, sub, cur_style)
elseif id == style_t then
if #t ~= 0 then
local new_t = {[0] = 'mstyle'}
@ -253,35 +267,42 @@ function nodes_to_table(head, cur_style)
t.displaystyle, t.scriptlevel = false, sub//2 - 1
end
cur_style = sub
new_core = space_like
elseif id == choice_t then
local size = cur_style//2
t[#t+1] = nodes_to_table(n[size == 0 and 'display' or size == 1 and 'text'
t[#t+1], new_core = nodes_to_table(n[size == 0 and 'display'
or size == 1 and 'text'
or size == 2 and 'script'
or size == 3 and 'scriptscript' or assert(false)], 2*size)
or size == 3 and 'scriptscript'
or assert(false)], 2*size), space_like
elseif id == radical_t then
t[#t+1] = radical_to_table(n, sub, cur_style)
t[#t+1], new_core = radical_to_table(n, sub, cur_style)
elseif id == fraction_t then
t[#t+1] = fraction_to_table(n, sub, cur_style)
t[#t+1], new_core = fraction_to_table(n, sub, cur_style)
elseif id == fence_t then
t[#t+1] = fence_to_table(n, sub, cur_style)
t[#t+1], new_core = fence_to_table(n, sub, cur_style)
elseif id == kern_t then
if not nonscript then
t[#t+1] = space_to_table(n.kern, sub, cur_style)
t[#t+1], new_core = space_to_table(n.kern, sub, cur_style)
end
elseif id == glue_t then
if cur_style >= 4 or not nonscript then
if sub == 98 then -- TODO magic number
nonscript = true
else
t[#t+1] = space_to_table(n.width, sub, cur_style)
t[#t+1], new_core = space_to_table(n.width, sub, cur_style)
end
end
else
t[#t+1] = {[0] = 'tex:TODO', other = n}
new_core = {[0] = 'tex:TODO', other = n}
t[#t+1] = new_core
end
nonscript = nil
if core and new_core ~= space_like then
core = new_core
end
return result
end
return result, core
end
local function register_remap(family, mapping)

1
luamml-tex.lua
View File

@ -21,7 +21,6 @@ luatexbase.add_to_callback('pre_mlist_to_hlist_filter', function(mlist, style)
print''
local xml = process_mlist(mlist, style == 'display' and 2 or 0)
print(write_xml(xml))
-- print(write_xml(xml, '\n'))
print''
return true
end, 'dump_list')