1if not modules then modules = { } end modules ['strc-rsc'] = { 2 version = 1.001, 3 comment = "companion to strc-ref.mkiv", 4 author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", 5 copyright = "PRAGMA ADE / ConTeXt Development Team", 6 license = "see context related readme files" 7} 8 9-- The scanner is in a separate module so that we can test without too 10-- many dependencies. 11 12-- The scanner accepts nested outer, but we don't care too much, maybe 13-- some day we will have both but currently the innermost wins. 14 15local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns 16local lpegP, lpegS, lpegCs, lpegCt, lpegCf, lpegCc, lpegC, lpegCg = lpeg.P, lpeg.S, lpeg.Cs, lpeg.Ct, lpeg.Cf, lpeg.Cc, lpeg.C, lpeg.Cg 17local find = string.find 18 19local spaces = lpegP(" ")^0 20local lparent = lpegP("(") 21local rparent = lpegP(")") 22local lbrace = lpegP("{") 23local rbrace = lpegP("}") 24local tcolon = lpegP(":::") -- component or outer 25local dcolon = lpegP("::") -- outer 26local scolon = lpegP(":") -- prefix 27local backslash = lpegP("\\") 28 29 lparent = spaces * lparent * spaces 30 rparent = spaces * rparent * spaces 31 lbrace = spaces * lbrace * spaces 32 rbrace = spaces * rbrace * spaces 33 tcolon = spaces * tcolon * spaces 34 dcolon = spaces * dcolon * spaces 35 36local endofall = spaces * lpegP(-1) 37 38----- o_token = 1 - rparent - rbrace - lparent - lbrace -- can be made more efficient 39----- a_token = 1 - rbrace 40local s_token = 1 - lparent - lbrace 41local i_token = 1 - lparent - lbrace - endofall 42local f_token = 1 - lparent - lbrace - dcolon 43local c_token = 1 - lparent - lbrace - tcolon 44 45-- experimental 46 47local o_token = lpegpatterns.nestedparents 48 + (1 - rparent - lbrace) 49local a_token = lpegpatterns.nestedbraces 50 + (1 - rbrace) 51local q_token = lpegpatterns.unsingle 52 + lpegpatterns.undouble 53 54local component = lpegCg(lpegCc("component") * lpegCs(c_token^1)) 55local outer = lpegCg(lpegCc("outer") * lpegCs(f_token^1)) 56----- operation = lpegCg(lpegCc("operation") * lpegCs(o_token^1)) 57local operation = lpegCg(lpegCc("operation") * lpegCs(q_token + o_token^1)) 58local arguments = lpegCg(lpegCc("arguments") * lpegCs(q_token + a_token^0)) 59local special = lpegCg(lpegCc("special") * lpegCs(s_token^1)) 60local inner = lpegCg(lpegCc("inner") * lpegCs(i_token^1)) 61 62 arguments = (lbrace * arguments * rbrace)^-1 63 component = component * tcolon 64 outer = outer * dcolon 65 operation = outer^-1 * operation -- special case: page(file::1) and file::page(1) 66 inner = inner * arguments 67 special = special * lparent * (operation * arguments)^-1 * rparent 68 69local referencesplitter = spaces 70 * lpegCf (lpegCt("") * (component + outer)^-1 * (special + inner)^-1 * endofall, rawset) 71 72local prefixsplitter = lpegCs(lpegP((1-scolon)^1 * scolon)) 73 * #-scolon 74 * lpegCs(lpegP(1)^1) 75 76local componentsplitter = lpegCs(lpegP((1-scolon)^1)) 77 * scolon * #-scolon 78 * lpegCs(lpegP(1)^1) 79 80prefixsplitter = componentsplitter 81 82local function splitreference(str) 83 if str and str ~= "" then 84 return lpegmatch(referencesplitter,str) 85 end 86end 87 88local function splitprefix(str) 89 return lpegmatch(prefixsplitter,str) 90end 91 92local function splitcomponent(str) 93 return lpegmatch(componentsplitter,str) 94end 95 96-- register in the right namespace 97 98structures = structures or { } 99structures.references = structures.references or { } 100local references = structures.references 101 102references.referencesplitter = referencesplitter 103references.splitreference = splitreference 104references.prefixsplitter = prefixsplitter 105references.splitprefix = splitprefix 106references.componentsplitter = componentsplitter 107references.splitcomponent = splitcomponent 108 109-- test code: 110 111-- inspect(splitreference([[component:::inner]])) 112-- inspect(splitprefix([[component:::inner]])) 113-- inspect(splitprefix([[component:inner]])) 114 115-- inspect(splitreference([[name(foo)]])) 116-- inspect(splitreference([[name{foo}]])) 117-- inspect(splitreference([[xx::name(foo, bar and me)]])) 118 119-- inspect(splitreference([[ ]])) 120-- inspect(splitreference([[ inner ]])) 121-- inspect(splitreference([[ special ( operation { argument, argument } ) ]])) 122-- inspect(splitreference([[ special ( operation { argument } ) ]])) 123-- inspect(splitreference([[ special ( operation { argument, \argument } ) ]])) 124-- inspect(splitreference([[ special ( operation { \argument } ) ]])) 125-- inspect(splitreference([[ special ( operation ) ]])) 126-- inspect(splitreference([[ special ( \operation ) ]])) 127-- inspect(splitreference([[ special ( o\peration ) ]])) 128-- inspect(splitreference([[ special ( ) ]])) 129-- inspect(splitreference([[ inner { argument } ]])) 130-- inspect(splitreference([[ inner { \argument } ]])) 131-- inspect(splitreference([[ inner { ar\gument } ]])) 132-- inspect(splitreference([[inner{a\rgument}]])) 133-- inspect(splitreference([[ inner { argument, argument } ]])) 134-- inspect(splitreference([[ inner { argument, \argument } ]])) -- fails: bug in lpeg? 135-- inspect(splitreference([[ inner { \argument, \argument } ]])) 136-- inspect(splitreference([[ outer :: ]])) 137-- inspect(splitreference([[ outer :: inner]])) 138-- inspect(splitreference([[ outer :: special (operation { argument,argument } ) ]])) 139-- inspect(splitreference([[ outer :: special (operation { } )]])) 140-- inspect(splitreference([[ outer :: special ( operation { argument, \argument } ) ]])) 141-- inspect(splitreference([[ outer :: special ( operation ) ]])) 142-- inspect(splitreference([[ outer :: special ( \operation ) ]])) 143-- inspect(splitreference([[ outer :: special ( ) ]])) 144-- inspect(splitreference([[ outer :: inner { argument } ]])) 145-- inspect(splitreference([[ special ( outer :: operation ) ]])) 146 147-- inspect(splitreference([[inner(foo,bar)]])) 148 149-- inspect(splitreference([[]])) 150-- inspect(splitreference([[inner]])) 151-- inspect(splitreference([[special(operation{argument,argument})]])) 152-- inspect(splitreference([[special(operation)]])) 153-- inspect(splitreference([[special(\operation)]])) 154-- inspect(splitreference([[special()]])) 155-- inspect(splitreference([[inner{argument}]])) 156-- inspect(splitreference([[inner{\argument}]])) 157-- inspect(splitreference([[outer::]])) 158-- inspect(splitreference([[outer::inner]])) 159-- inspect(splitreference([[outer::special(operation{argument,argument})]])) 160-- inspect(splitreference([[outer::special(operation{argument,\argument})]])) 161-- inspect(splitreference([[outer::special(operation)]])) 162-- inspect(splitreference([[outer::special(\operation)]])) 163-- inspect(splitreference([[outer::special()]])) 164-- inspect(splitreference([[outer::inner{argument}]])) 165-- inspect(splitreference([[special(outer::operation)]])) 166 167-- inspect(splitreference([[special(operation)]])) 168-- inspect(splitreference([[special(operation(whatever))]])) 169-- inspect(splitreference([[special(operation{argument,argument{whatever}})]])) 170-- inspect(splitreference([[special(operation{argument{whatever}})]])) 171 172-- inspect(splitreference([[special("operation(")]])) 173-- inspect(splitreference([[special("operation(whatever")]])) 174-- inspect(splitreference([[special(operation{"argument,argument{whatever"})]])) 175-- inspect(splitreference([[special(operation{"argument{whatever"})]])) 176 177-- inspect(splitreference([[url(http://a,b.c)]])) 178-- inspect(splitcomponent([[url(http://a,b.c)]])) 179-- inspect(splitcomponent([[url(http://a.b.c)]])) 180 181 |
