43 lines
1.7 KiB
Lua
43 lines
1.7 KiB
Lua
local properties = node.get_properties_table()
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local if_vertical = token.create'ifv@'
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local if_horizontal = token.create'ifh@'
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local iftrue_index = token.create'iftrue'.index
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local funcid = luatexbase.new_luafunction'__luamml_kernel_finalize_phantom:N'
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token.set_lua('__luamml_kernel_finalize_phantom:N', funcid, 'protected')
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lua.get_functions_table()[funcid] = function()
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-- TODO: Error handling etc
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-- At this point, box 0 contains the inner expression and the curent list ends with the noad whose nucleus should get replaced
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local size = token.scan_int()//2
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local boxnum = 0
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local startmath = tex.box[boxnum].list
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assert(startmath.id == node.id"math")
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local nucl = assert(tex.nest.top.tail.nucleus)
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local props = properties[nucl]
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if not props then -- very likely
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props = {}
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properties[nucl] = props
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end
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assert(not props.mathml_table)
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local saved = assert(assert(properties[startmath]).saved_mathml_table)
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if saved[0] == 'mstyle'
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and (not saved.displaystyle or saved.displaystyle == (size == 0))
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and (not saved.scriptlevel or saved.scriptlevel == (size == 0 and 0 or size-1))
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then
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saved[0], saved.displaystyle, saved.scriptlevel = 'mphantom', nil, nil
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elseif saved[0] == 'mrow' then
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saved[0] = 'mphantom'
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else
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saved = {[0] = 'mphantom', saved}
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end
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-- The following could be optimized for the case that both if_vertical and if_horizontal
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-- are set, but that should't happen ayway and is just supported for consistency.
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if if_vertical.index ~= iftrue_index then
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saved = {[0] = 'mpadded', height = 0, depth = 0, saved}
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end
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if if_horizontal.index ~= iftrue_index then
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saved = {[0] = 'mpadded', width = 0, saved}
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end
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props.mathml_table = saved
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end
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