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function tostr(t)
local str = ""
for k, v in next, t do
if #str > 0 then
str = str .. ", "
end
if type(k) == "number" then
str = str .. "[" .. k .. "] = "
else
str = str .. tostring(k) .. " = "
end
if type(v) == "table" then
str = str .. "{ " .. tostr(v) .. " }"
elseif type(v) == "string" then
str = str .. '"' .. v .. '"'
else
str = str .. tostring(v)
end
end
return str
end
function trim_ws(s)
return s:match("^%s*(.*)")
end
function count_hypens(s)
local leftover = s:match("^-*(.*)")
return string.len(s) - string.len(leftover)
end
function pretty_print_slide(slide)
io.write("{\n")
if slide.transition then
io.write(" transition = \"", slide.transition, "\",\n")
end
for i = 1, #slide do
local node = slide[i]
for j = 0, node.indent do
io.write(" ")
end
io.write("{ ")
io.write(tostr(node))
io.write(" },\n")
end
io.write("},\n")
end
function pretty_print_slides(slides)
io.write("gSlides = {\n")
for i = 1, #slides do
pretty_print_slide(slides[i])
end
io.write("}\n")
end
function parse_attr(s, lvalue)
local ts = "^<%s*" .. lvalue .. "%s*=%s*(%a+)%s*>$"
return s:match(ts)
end
function flush(slides, block)
if #block > 0 then
slides[#slides + 1] = block
return {}
end
return block
end
function parse_file(file)
local slides = {}
local block = {}
for line in file:lines() do
local s = trim_ws(line)
if #s == 0 then -- done with a block
block = flush(slides, block)
else
local transition_type = parse_attr(s, "transition")
local blockstyle = parse_attr(s, "blockstyle")
if transition_type then
block["transition"] = transition_type
elseif blockstyle then
block["blockstyle"] = blockstyle
else
if block.blockstyle == "code" then
block[#block + 1] = { text = line }
else
local n = count_hypens(s)
block[#block + 1] = {
indent = n,
text = trim_ws(s:sub(n + 1, -1))
}
end
end
end
end
flush(slides, block)
return slides
end
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