diff options
Diffstat (limited to 'tex/context/base/core-env.lua')
| -rw-r--r-- | tex/context/base/core-env.lua | 308 |
1 files changed, 154 insertions, 154 deletions
diff --git a/tex/context/base/core-env.lua b/tex/context/base/core-env.lua index c85a5e144..025192d4b 100644 --- a/tex/context/base/core-env.lua +++ b/tex/context/base/core-env.lua @@ -1,154 +1,154 @@ -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 csname_id = token.csname_id
-local create = token.create
-local texcount = tex.count
-local texsetcount = tex.setcount
-
-local allocate = utilities.storage.allocate
-local setmetatableindex = table.setmetatableindex
-
-local undefined = csname_id("*undefined*crap*")
-local iftrue = create("iftrue")[2] -- inefficient hack
-
-tex.modes = allocate { }
-tex.systemmodes = allocate { }
-tex.constants = allocate { }
-tex.conditionals = allocate { }
-tex.ifs = allocate { }
-
-local modes = { }
-local systemmodes = { }
-
-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 texcount[n] >= 1 end
- return texcount[n] >= 1
- 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 texcount[n] >= 1 end
- return texcount[n] >= 1
- end
- end
-end)
-
-setmetatableindex(tex.constants, function(t,k)
- return csname_id(k) ~= undefined and texcount[k] or 0
-end)
-
-setmetatableindex(tex.conditionals, function(t,k) -- 0 == true
- return csname_id(k) ~= undefined and texcount[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)
-
--- todo : global
-
--- not possible as we let at the tex end to zerocount and plusone
---
--- function tex.settrue(name,glob)
--- if glob then
--- texsetcount("global",name,0)
--- else
--- texcount[name] = 0
--- end
--- end
---
--- function tex.setfalse(name,glob)
--- if glob then
--- texsetcount("global",name,1)
--- else
--- texcount[name] = 1
--- 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
-
-function commands.autosetups(str)
- lpegmatch(pattern,str)
-end
-
--- new (inefficient)
-
-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
-
--- inspect(tex.isdimen("xxxxxxxxxxxxxxx"))
--- inspect(tex.isdimen("textwidth"))
+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 csname_id = token.csname_id +local create = token.create +local texcount = tex.count +local texsetcount = tex.setcount + +local allocate = utilities.storage.allocate +local setmetatableindex = table.setmetatableindex + +local undefined = csname_id("*undefined*crap*") +local iftrue = create("iftrue")[2] -- inefficient hack + +tex.modes = allocate { } +tex.systemmodes = allocate { } +tex.constants = allocate { } +tex.conditionals = allocate { } +tex.ifs = allocate { } + +local modes = { } +local systemmodes = { } + +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 texcount[n] >= 1 end + return texcount[n] >= 1 + 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 texcount[n] >= 1 end + return texcount[n] >= 1 + end + end +end) + +setmetatableindex(tex.constants, function(t,k) + return csname_id(k) ~= undefined and texcount[k] or 0 +end) + +setmetatableindex(tex.conditionals, function(t,k) -- 0 == true + return csname_id(k) ~= undefined and texcount[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) + +-- todo : global + +-- not possible as we let at the tex end to zerocount and plusone +-- +-- function tex.settrue(name,glob) +-- if glob then +-- texsetcount("global",name,0) +-- else +-- texcount[name] = 0 +-- end +-- end +-- +-- function tex.setfalse(name,glob) +-- if glob then +-- texsetcount("global",name,1) +-- else +-- texcount[name] = 1 +-- 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 + +function commands.autosetups(str) + lpegmatch(pattern,str) +end + +-- new (inefficient) + +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 + +-- inspect(tex.isdimen("xxxxxxxxxxxxxxx")) +-- inspect(tex.isdimen("textwidth")) |