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Diffstat (limited to 'metapost/context/base/mpiv/mp-luas.mpxl')
| -rw-r--r-- | metapost/context/base/mpiv/mp-luas.mpxl | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/metapost/context/base/mpiv/mp-luas.mpxl b/metapost/context/base/mpiv/mp-luas.mpxl new file mode 100644 index 000000000..0dac5cefc --- /dev/null +++ b/metapost/context/base/mpiv/mp-luas.mpxl @@ -0,0 +1,223 @@ +%D \module +%D [ file=mp-luas.mpiv, +%D version=2014.04.14, +%D title=\CONTEXT\ \METAPOST\ graphics, +%D subtitle=\LUA, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +if known context_luas : endinput ; fi ; + +% When I prototyped the runscript primitive I was just thinking of a usage like +% the original \directlua primitive in luatex: genererate something and pipe +% that back to metapost, and have access to some internals. Instead of compiling +% the code a the metapost end here we delegate that to the lua end. Only strings +% get passed. Of course in the end the real usage got a bit beyong the intended +% usage. So, in addition to some definitions here there are and will be use in +% other metafun modules too. Of course in retrospect I should have done this five +% years earlier. + +boolean context_luas ; context_luas := true ; + +newinternal mfid_scriptindex ; +mfid_scriptindex := runscript("mp.mf_script_index('scriptindex')") ; + +def scriptindex = runscript mfid_scriptindex enddef ; + +string mfun_lua_bs ; mfun_lua_bs := "[===[" ; +string mfun_lua_es ; mfun_lua_es := "]===]" ; + +vardef mlib_luas_luacall(text t) = + runscript("" for s = t : + if string s : + & s + % & mfun_lua_bs & s & mfun_lua_es + elseif numeric s : + & decimal s + elseif boolean s : + & if s : "true" else : "false" fi + elseif pair s : + & mfun_pair_to_table(s) + elseif path s : + & mfun_path_to_table(s) + elseif rgbcolor s : + & mfun_rgb_to_table(s) + elseif cmykcolor s : + & mfun_cmyk_to_table(s) + else : + & ditto & tostring(s) & ditto + fi endfor + ) +enddef ; + +newinternal mfun_luas_b ; + +def mlib_luas_luadone = + exitif numeric begingroup mfun_luas_b := 1 ; endgroup ; +enddef ; + +vardef mlib_luas_lualist(expr c)(text t) = % we could use mlib_luas_s instead of c + interim mfun_luas_b := 0 ; + runscript(c & for s = t : + if mfun_luas_b = 0 : + "(" + % hide(mfun_luas_b := 1) + mlib_luas_luadone + else : + "," + fi + & + if string s : + mfun_lua_bs & s & mfun_lua_es + elseif numeric s : + decimal s + elseif boolean s : + if s : "true" else : "false" fi + elseif pair s : + mfun_pair_to_table(s) + elseif path s : + mfun_path_to_table(s) + elseif rgbcolor s : + mfun_rgb_to_table(s) + elseif cmykcolor s : + mfun_cmyk_to_table(s) + else : + ditto & tostring(s) & ditto + fi & endfor if mfun_luas_b = 0 : "()" else : ")" fi + ) +enddef ; + +def luacall = mlib_luas_luacall enddef ; % why no let + +vardef lualist@#(text t) = mlib_luas_lualist(str @#)(t) enddef ; + +string mlib_luas_s ; % saves save/restore + +vardef lua@#(text t) = + mlib_luas_s := str @# ; + if length(mlib_luas_s) > 0 : + mlib_luas_lualist(mlib_luas_s,t) + else : + mlib_luas_luacall(t) + fi +enddef ; + +vardef MP@#(text t) = + mlib_luas_lualist("MP." & str @#,t) +enddef ; + +def message expr t = + lua.mp.report(tostring(t)) ; +enddef ; + +% Color: + +% We do a low level runscript: +% +% lua.mp.namedcolor(s) % conflicts with macro namedcolor +% lua.mp.mf_named_color(s) % okay but, can also be +% lua.mp("mf_named_color",s) % which gives expansion mess + +newinternal mfid_resolvedcolor ; mfid_resolvedcolor := scriptindex "namedcolor" ; + +def resolvedcolor = runscript mfid_resolvedcolor enddef ; + +% Modes: + +vardef texmode (expr s) = lua.mp("mode", s) enddef ; +vardef systemmode(expr s) = lua.mp("systemmode",s) enddef ; + +% A few helpers + +vardef isarray suffix a = lua.mp.isarray (str a) enddef ; +vardef prefix suffix a = lua.mp.prefix (str a) enddef ; +vardef dimension suffix a = lua.mp.dimension(str a) enddef ; + +% More access + +vardef getmacro(expr k) = lua.mp._get_macro_(k) enddef ; +vardef getdimen(expr k) = lua.mp._get_dimen_(k) enddef ; +vardef getcount(expr k) = lua.mp._get_count_(k) enddef ; +vardef gettoks (expr k) = lua.mp._get_toks_ (k) enddef ; + +def setmacro(expr k,v) = lua.mp._set_macro_(k,v) enddef ; +def setdimen(expr k,v) = lua.mp._set_dimen_(k,v) enddef ; +def setcount(expr k,v) = lua.mp._set_count_(k,v) enddef ; +def settoks (expr k,v) = lua.mp._set_toks_ (k,v) enddef ; + +vardef positionpath (expr name) = lua.mp.positionpath (name) enddef ; +vardef positioncurve (expr name) = lua.mp.positioncurve (name) enddef ; +vardef positionxy (expr name) = lua.mp.positionxy (name) enddef ; +vardef positionpxy (expr name) = lua.mp.positionpxy (name) enddef ; +vardef positionwhd (expr name) = lua.mp.positionwhd (name) enddef ; +vardef positionpage (expr name) = lua.mp.positionpage (name) enddef ; +vardef positionregion(expr name) = lua.mp.positionregion(name) enddef ; +vardef positionbox (expr name) = lua.mp.positionbox (name) enddef ; +vardef positionanchor = lua.mp.positionanchor() enddef ; + +let wdpart = redpart ; +let htpart = greenpart ; +let dppart = bluepart ; + +vardef positioninregion = + currentpicture := currentpicture shifted - positionxy(positionanchor) ; +enddef ; + +vardef positionatanchor(expr name) = + currentpicture := currentpicture shifted - positionxy(name) ; +enddef ; + +vardef texvar(expr name) = lua.mp.texvar(name) enddef ; +vardef texstr(expr name) = lua.mp.texstr(name) enddef ; + +newinternal mfid_path_lengthof ; mfid_path_lengthof := scriptindex "pathlengthof" ; +newinternal mfid_path_pointof ; mfid_path_pointof := scriptindex "pathpointof" ; +newinternal mfid_path_leftof ; mfid_path_leftof := scriptindex "pathleftof" ; +newinternal mfid_path_rightof ; mfid_path_rightof := scriptindex "pathrightof" ; +newinternal mfid_path_reset ; mfid_path_reset := scriptindex "pathreset" ; + +% 25 pct gain + + def inpath = = 1 step 1 until runscript mfid_path_lengthof enddef ; +vardef pointof primary i = runscript mfid_path_pointof i enddef ; +vardef leftof primary i = runscript mfid_path_leftof i enddef ; +vardef rightof primary i = runscript mfid_path_rightof i enddef ; + +% another 10 pct gain + +% def inpath = = 1 step 1 until runscript mfid_path_lengthof enddef ; +% def pointof = runscript mfid_path_pointof enddef ; +% def leftof = runscript mfid_path_leftof enddef ; +% def rightof = runscript mfid_path_rightof enddef ; + +extra_endfig := extra_endfig & " runscript mfid_path_reset ; " ; + +vardef utflen(expr s) = lua.mp.utflen(s) enddef ; +vardef utfsub(expr s,f,t) = lua.mp.utfsub(s,f,t) enddef ; + +newinternal mfid_getparameters ; mfid_getparameters := scriptindex "getparameters" ; +newinternal mfid_presetparameters ; mfid_presetparameters := scriptindex "presetparameters" ; +newinternal mfid_getparameter ; mfid_getparameter := scriptindex "getparameter" ; +newinternal mfid_getparameterdefault ; mfid_getparameterdefault := scriptindex "getparameterdefault" ; +newinternal mfid_getparametercount ; mfid_getparametercount := scriptindex "getparametercount" ; +newinternal mfid_getparameterpath ; mfid_getparameterpath := scriptindex "getparameterpath" ; +newinternal mfid_getparametertext ; mfid_getparametertext := scriptindex "getparametertext" ; +newinternal mfid_applyparameters ; mfid_applyparameters := scriptindex "applyparameters" ; +newinternal mfid_pushparameters ; mfid_pushparameters := scriptindex "pushparameters" ; +newinternal mfid_popparameters ; mfid_popparameters := scriptindex "popparameters" ; + +def getparameters = runscript mfid_getparameters enddef ; +def presetparameters = runscript mfid_presetparameters enddef ; +def getparameter = runscript mfid_getparameter enddef ; +def getparameterdefault = runscript mfid_getparameterdefault enddef ; +def getparametercount = runscript mfid_getparametercount enddef ; +def getparameterpath = runscript mfid_getparameterpath enddef ; +def getparametertext = runscript mfid_getparametertext enddef ; +def applyparameters = runscript mfid_applyparameters enddef ; +def pushparameters = runscript mfid_pushparameters enddef ; +def popparameters = runscript mfid_popparameters enddef ; |