diff options
Diffstat (limited to 'tex/context/base/mkiv/core-env.lua')
| -rw-r--r-- | tex/context/base/mkiv/core-env.lua | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/core-env.lua b/tex/context/base/mkiv/core-env.lua new file mode 100644 index 000000000..866176171 --- /dev/null +++ b/tex/context/base/mkiv/core-env.lua @@ -0,0 +1,274 @@ +if not modules then modules = { } end modules ['core-env'] = { + version = 1.001, + comment = "companion to core-env.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +-- maybe this will move to the context name space although the +-- plurals are unlikely to clash with future tex primitives +-- +-- if tex.modes['xxxx'] then .... else .... end + +local P, C, S, Cc, lpegmatch, patterns = lpeg.P, lpeg.C, lpeg.S, lpeg.Cc, lpeg.match, lpeg.patterns + +local newtoken = newtoken or token +local context = context + +local texgetcount = tex.getcount +local texsetcount = tex.setcount + +local allocate = utilities.storage.allocate +local setmetatableindex = table.setmetatableindex +local setmetatablecall = table.setmetatablecall + +tex.modes = allocate { } +tex.systemmodes = allocate { } +tex.constants = allocate { } +tex.conditionals = allocate { } +tex.ifs = allocate { } +tex.isdefined = allocate { } + +local modes = { } +local systemmodes = { } + +-- we could use the built-in tex.is[count|dimen|skip|toks] here but caching +-- at the lua en dis not that bad (and we need more anyway) + +-- undefined: mode == 0 or cmdname = "undefined_cs" + +local create = newtoken.create + +local cache = table.setmetatableindex(function(t,k) + local v = create(k) + t[k] = v + return v +end) + +-- we can have a modes cache too + +local iftrue = cache["iftrue"].mode +local undefined = cache["*undefined*crap*"].mode -- is this ok? + +setmetatableindex(tex.modes, function(t,k) + local m = modes[k] + if m then + return m() + else + local n = "mode>" .. k + if cache[n].mode == 0 then + return false + else + modes[k] = function() return texgetcount(n) == 1 end + return texgetcount(n) == 1 -- 2 is prevented + end + end +end) + +setmetatableindex(tex.systemmodes, function(t,k) + local m = systemmodes[k] + if m then + return m() + else + local n = "mode>*" .. k + if cache[n].mode == 0 then + return false + else + systemmodes[k] = function() return texgetcount(n) == 1 end + return texgetcount(n) == 1 -- 2 is prevented + end + end +end) + +setmetatableindex(tex.constants, function(t,k) + return cache[k].mode ~= 0 and texgetcount(k) or 0 +end) + +setmetatableindex(tex.conditionals, function(t,k) -- 0 == true + return cache[k].mode ~= 0 and texgetcount(k) == 0 +end) + +table.setmetatableindex(tex.ifs, function(t,k) + -- local mode = cache[k].mode + -- if mode == 0 then + -- return nil + -- else + -- return mode == iftrue + -- end + return cache[k].mode == iftrue +end) + +setmetatableindex(tex.isdefined, function(t,k) + return k and cache[k].mode ~= 0 +end) + +setmetatablecall(tex.isdefined, function(t,k) + return k and cache[k].mode ~= 0 +end) + +local dimencode = cache["scratchdimen"] .command +local countcode = cache["scratchcounter"] .command +local tokencode = cache["scratchtoken"] .command +local skipcode = cache["scratchskip"] .command +local muskipcode = cache["scratchmuskip"] .command +---- attributecode = cache["scratchattribute"].command + +local types = { + [dimencode] = "dimen", + [countcode] = "count", + [tokencode] = "token", + [skipcode] = "skip", + [muskipcode] = "muskip", + -- [attributecode] = "attribute", +} + +function tex.isdimen(name) + local hit = cache[name] + return hit.command == dimencode and hit.index or true +end + +function tex.iscount(name) + local hit = cache[name] + return hit.command == countcode and hit.index or true +end + +function tex.istoken(name) + local hit = cache[name] + return hit.command == tokencode and hit.index or true +end + +function tex.isskip(name) + local hit = cache[name] + return hit.command == skipcode and hit.index or true +end + +function tex.ismuskip(name) + local hit = cache[name] + return hit.command == muskipcode and hit.index or true +end + +function tex.type(name) + return types[cache[name].command] or "macro" +end + +-- -- old token code +-- +-- local csname_id = token.csname_id +-- local create = token.create +-- +-- local undefined = csname_id("*undefined*crap*") +-- local iftrue = create("iftrue")[2] -- inefficient hack +-- +-- setmetatableindex(tex.modes, function(t,k) +-- local m = modes[k] +-- if m then +-- return m() +-- else +-- local n = "mode>" .. k +-- if csname_id(n) == undefined then +-- return false +-- else +-- modes[k] = function() return texgetcount(n) == 1 end +-- return texgetcount(n) == 1 -- 2 is prevented +-- end +-- end +-- end) +-- +-- setmetatableindex(tex.systemmodes, function(t,k) +-- local m = systemmodes[k] +-- if m then +-- return m() +-- else +-- local n = "mode>*" .. k +-- if csname_id(n) == undefined then +-- return false +-- else +-- systemmodes[k] = function() return texgetcount(n) == 1 end +-- return texgetcount(n) == 1 -- 2 is prevented +-- end +-- end +-- end) +-- +-- setmetatableindex(tex.constants, function(t,k) +-- return csname_id(k) ~= undefined and texgetcount(k) or 0 +-- end) +-- +-- setmetatableindex(tex.conditionals, function(t,k) -- 0 == true +-- return csname_id(k) ~= undefined and texgetcount(k) == 0 +-- end) +-- +-- setmetatableindex(tex.ifs, function(t,k) +-- -- k = "if" .. k -- better not +-- return csname_id(k) ~= undefined and create(k)[2] == iftrue -- inefficient, this create, we need a helper +-- end) +-- +-- setmetatableindex(tex.isdefined, function(t,k) +-- return k and csname_id(k) ~= undefined +-- end) +-- setmetatablecall(tex.isdefined, function(t,k) +-- return k and csname_id(k) ~= undefined +-- end) +-- +-- local lookuptoken = token.lookup +-- +-- local dimencode = lookuptoken("scratchdimen" )[1] +-- local countcode = lookuptoken("scratchcounter")[1] +-- local tokencode = lookuptoken("scratchtoken" )[1] +-- local skipcode = lookuptoken("scratchskip" )[1] +-- +-- local types = { +-- [dimencode] = "dimen", +-- [countcode] = "count", +-- [tokencode] = "token", +-- [skipcode ] = "skip", +-- } +-- +-- function tex.isdimen(name) +-- return lookuptoken(name)[1] == dimencode +-- end +-- +-- function tex.iscount(name) +-- return lookuptoken(name)[1] == countcode +-- end +-- +-- function tex.istoken(name) +-- return lookuptoken(name)[1] == tokencode +-- end +-- +-- function tex.isskip(name) +-- return lookuptoken(name)[1] == skipcode +-- end +-- +-- function tex.type(name) +-- return types[lookuptoken(name)[1]] or "macro" +-- end + +function context.setconditional(name,value) + if value then + context.settruevalue(name) + else + context.setfalsevalue(name) + end +end + +---- arg = P("{") * C(patterns.nested) * P("}") + Cc("") + +local sep = S("), ") +local str = C((1-sep)^1) +local tag = P("(") * C((1-S(")" ))^1) * P(")") +local arg = P("(") * C((1-S("){"))^1) * P("{") * C((1-P("}"))^0) * P("}") * P(")") + +local pattern = ( + P("lua") * tag / context.luasetup + + P("xml") * arg / context.setupwithargument -- or xmlw as xmlsetup has swapped arguments + + (P("tex") * tag + str) / context.texsetup + + sep^1 +)^1 + +interfaces.implement { + name = "autosetups", + actions = function(str) lpegmatch(pattern,str) end, + arguments = "string" +} + |