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if not modules then modules = { } end modules ['m-spreadsheet'] = {
version = 1.001,
comment = "companion to m-spreadsheet.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local byte, format, gsub = string.byte, string.format, string.gsub
local R, P, C, V, Cs, Cc, Carg, lpegmatch = lpeg.R, lpeg.P, lpeg.C, lpeg.V, lpeg.Cs, lpeg.Cc, lpeg.Carg, lpeg.match
local context = context
local splitthousands = utilities.parsers.splitthousands
local variables = interfaces.variables
local v_yes = variables.yes
moduledata = moduledata or { }
local spreadsheets = { }
moduledata.spreadsheets = spreadsheets
local data = {
-- nothing yet
}
local settings = {
period = ".",
comma = ",",
}
spreadsheets.data = data
spreadsheets.settings = settings
local defaultname = "default"
local stack = { }
local current = defaultname
local d_mt ; d_mt = {
__index = function(t,k)
local v = { }
setmetatable(v,d_mt)
t[k] = v
return v
end,
}
local s_mt ; s_mt = {
__index = function(t,k)
local v = settings[k]
t[k] = v
return v
end,
}
function spreadsheets.setup(t)
for k, v in next, t do
settings[k] = v
end
end
function spreadsheets.reset(name)
if not name or name == "" then name = defaultname end
local d = { }
local s = { }
setmetatable(d,d_mt)
setmetatable(s,s_mt)
data[name] = {
name = name,
data = d,
settings = s,
temp = { }, -- for local usage
}
end
function spreadsheets.start(name,s)
if not name or name == "" then name = defaultname end
table.insert(stack,current)
current = name
if data[current] then
setmetatable(s,s_mt)
data[current].settings = s
else
local d = { }
setmetatable(d,d_mt)
setmetatable(s,s_mt)
data[current] = {
name = name,
data = d,
settings = s,
temp = { },
}
end
end
function spreadsheets.stop()
current = table.remove(stack)
end
spreadsheets.reset()
local offset = byte("A") - 1
local function assign(s,n)
return format("moduledata.spreadsheets.data['%s'].data[%s]",n,byte(s)-offset)
end
function datacell(a,b,...)
local n = 0
if b then
local t = { a, b, ... }
for i=1,#t do
n = n * (i-1) * 26 + byte(t[i]) - offset
end
else
n = byte(a) - offset
end
return format("dat[%s]",n)
end
local cell = C(R("AZ"))^1 / datacell * (Cc("[") * (R("09")^1) * Cc("]") + #P(1))
local pattern = Cs((cell + P(1))^0)
local functions = { }
spreadsheets.functions = functions
function functions.sum(c,f,t)
if f and t then
local r = 0
for i=f,t do
r = r + c[i]
end
return r
else
return 0
end
end
function functions.fmt(pattern,n)
if find(pattern,"^%%") then
return format(pattern,n)
else
return format("%"..pattern,n)
end
end
local template = [[
local _m_ = moduledata.spreadsheets
local dat = _m_.data['%s'].data
local tmp = _m_.temp
local fnc = _m_.functions
local sum = fnc.sum
local fmt = fnc.fmt
return %s
]]
-- to be considered: a weak cache
local function execute(name,r,c,str)
-- if name == "" then name = current if name == "" then name = defaultname end end
str = lpegmatch(pattern,str,1,name)
str = format(template,name,str)
local result = loadstring(str)
result = result and result() or 0
data[name].data[c][r] = result
if type(result) == "function" then
return result()
else
return result
end
end
function spreadsheets.set(name,r,c,str)
if name == "" then name = current if name == "" then name = defaultname end end
execute(name,r,c,str)
end
function spreadsheets.get(name,r,c,str)
if name == "" then name = current if name == "" then name = defaultname end end
local dname = data[name]
if not str or str == "" then
context(dname.data[c][r] or 0)
else
local result = execute(name,r,c,str)
if result then
if type(result) == "number" then
dname.data[c][r] = result
result = tostring(result)
end
local settings = dname.settings
local split = settings.split
local period = settings.period
local comma = settings.comma
if split == v_yes then
result = splitthousands(result)
end
if period == "" then period = nil end
if comma == "" then comma = nil end
result = gsub(result,".",{ ["."] = period, [","] = comma })
context(result)
end
end
end
function spreadsheets.doifelsecell(name,r,c)
if name == "" then name = current if name == "" then name = defaultname end end
local d = data[name]
commands.testcase(d and d.data[c][r])
end
function spreadsheets.show(name)
if name == "" then name = current if name == "" then name = defaultname end end
table.print(data[name].data,name)
end
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