105 lines
3.3 KiB
Lua
105 lines
3.3 KiB
Lua
local mlist_to_mml = require'luamml-convert'
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local process_mlist = mlist_to_mml.process
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local make_root = mlist_to_mml.make_root
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local register_family = mlist_to_mml.register_family
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local mappings = require'luamml-legacy-mappings'
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local write_xml = require'luamml-xmlwriter'
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local properties = node.get_properties_table()
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local funcid = luatexbase.new_luafunction'RegisterFamilyMapping'
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token.set_lua('RegisterFamilyMapping', funcid, 'protected')
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lua.get_functions_table()[funcid] = function()
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local fam = token.scan_int()
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local mapping = token.scan_string()
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if mappings[mapping] then
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register_family(fam, mappings[mapping])
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else
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tex.error(string.format('Unknown font mapping %q', mapping))
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end
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end
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-- Possible flag values:
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-- 0: Normal (This is the only supported one in display mode)
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-- 1: Like 0, result is display math
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-- 2: Generate MathML, but only save it for later usage in startmath node
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-- 3: Skip
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-- 4: Prepend node list from buffer before generating
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-- 5: Like 5, result is display math
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-- 6: 2+4
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-- 7: Skip but save copy of node list in buffer
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--
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-- In other words:
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-- Bit 1: Suppress output
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-- Bit 0: Force display if 1 isn't set, if it is then skip MathML generation
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-- Bit 2: Integrate with table mechanism
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local mlist_buffer
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local mlist_result, mlist_display
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local function save_result(xml, display)
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mlist_result, mlist_display = xml, display
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if tex.count.tracingmathml > 1 then
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-- Here xml gets wrapped in an mrow to avoid modifying it.
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texio.write_nl(write_xml(make_root({[0] = 'mrow', xml}, display and 0 or 2)) .. '\n')
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end
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end
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luatexbase.add_to_callback('pre_mlist_to_hlist_filter', function(mlist, style)
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local flag = tex.count.l__luamml_flag_int
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if flag & 3 == 3 then
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if flag & 4 == 4 then
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assert(mlist_buffer == nil)
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mlist_buffer = node.copy_list(mlist)
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end
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return true
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end
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local new_mlist, buffer_tail
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if flag & 4 == 4 then
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new_mlist, buffer_tail = assert(mlist_buffer), node.tail(mlist_buffer)
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mlist.prev, buffer_tail.next = buffer_tail, mlist
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mlist_buffer = nil
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else
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new_mlist = mlist
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end
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local xml = process_mlist(new_mlist, style == 'display' and 0 or 2)
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if flag & 2 == 0 then
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save_result(xml, style == 'display' or flag & 1 == 1)
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end
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if style == 'text' then
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local startmath = tex.nest.top.tail
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local props = properties[startmath]
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if not props then
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props = {}
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properties[startmath] = props
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end
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props.saved_mathml_table = xml
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end
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if buffer_tail then
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mlist.prev, buffer_tail.next = nil, nil
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node.flush_list(new_mlist)
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end
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return true
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end, 'dump_list')
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funcid = luatexbase.new_luafunction'luamml_get_last_mathml_stream:e'
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token.set_lua('luamml_get_last_mathml_stream:e', funcid)
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lua.get_functions_table()[funcid] = function()
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if not mlist_result then
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tex.error('No current MathML data', {
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"I was asked to provide MathML code for the last formula, but there weren't any new formulas since you last asked."
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})
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end
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local mml = write_xml(make_root(mlist_result, mlist_display and 0 or 2))
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if tex.count.tracingmathml == 1 then
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texio.write_nl(mml .. '\n')
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end
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tex.sprint(-2, tostring(pdf.immediateobj('stream', mml, '/Subtype/application#2Fmathml+xml' .. token.scan_argument(true))))
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mlist_result = nil
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end
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return {
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save_result = save_result,
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}
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