diff options
Diffstat (limited to 'tex/context/base/mkxl/driv-ini.lmt')
| -rw-r--r-- | tex/context/base/mkxl/driv-ini.lmt | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/tex/context/base/mkxl/driv-ini.lmt b/tex/context/base/mkxl/driv-ini.lmt index 7b50a8cbf..729196e87 100644 --- a/tex/context/base/mkxl/driv-ini.lmt +++ b/tex/context/base/mkxl/driv-ini.lmt @@ -61,6 +61,150 @@ local defaulthandlers = { outputfilename = dummy, } +local installwhatsits do + + local leaderlevel = 0 + local backends = backends + + local function pushleaderlevel() + leaderlevel = leaderlevel + 1 + end + + local function popleaderlevel() + leaderlevel = leaderlevel - 1 + end + + local function flushlatelua(current,h,v) + -- Here we assume maganement by the lua function so currently we don't + -- check for leaderlevel. + return backends.latelua(current,h,v) + end + + local function flushwriteout(current) + if leaderlevel == 0 then + backends.writeout(current) + end + end + + local function flushopenout(current) + if leaderlevel == 0 then + backends.openout(current) + end + end + + local function flushcloseout(current) + if leaderlevel == 0 then + backends.closeout(current) + end + end + + local function flushsavepos(current,pos_h,pos_v) + local jp = job.positions + jp.lastx = pos_h + jp.lasty = pos_v + end + + local function flushuserdefined() + -- nothing here + end + + local whatsitcodes = nodes.whatsitcodes + + local trace = true trackers.register("backends.whatsits",function(v) trace = v end) + + installwhatsits = function(name,flushers) + + -- latelua : specific + -- userdefined : special purpose, handled in callbacks + -- savepos : only used by generic packages + -- open : generic + -- close : generic + -- write : generic + + -- An alternative is to have a first time setter. + + local function checkagain(t, k) + local v = rawget(flushers,k) -- in case it's registered later + if not v then + if trace then + report("unsupported whatsit %a in driver %a",whatsitcodes[k] or k,name) + end + v = function() end + end + t[k] = v + return v + end + + -- flushers.whatsit = setmetatableindex ( { + -- [whatsitcodes.literal] = flushers.literal, + -- [whatsitcodes.latelua] = flushlatelua, + -- [whatsitcodes.userdefined] = flushuserdefined, + -- [whatsitcodes.savepos] = flushsavepos, + -- [whatsitcodes.save] = flushers.save, + -- [whatsitcodes.restore] = flushers.restore, + -- [whatsitcodes.setmatrix] = flushers.setmatrix, + -- [whatsitcodes.open] = flushopenout, + -- [whatsitcodes.close] = flushcloseout, + -- [whatsitcodes.write] = flushwriteout, + -- [whatsitcodes.startmatrix] = flushers.startmatrix, + -- [whatsitcodes.stopmatrix] = flushers.stopmatrix, + -- [whatsitcodes.startscaling] = flushers.startscaling, + -- [whatsitcodes.stopscaling] = flushers.stopscaling, + -- [whatsitcodes.startrotation] = flushers.startrotation, + -- [whatsitcodes.stoprotation] = flushers.stoprotation, + -- [whatsitcodes.startmirroring] = flushers.startmirroring, + -- [whatsitcodes.stopmirroring] = flushers.stopmirroring, + -- [whatsitcodes.startclipping] = flushers.startclipping, + -- [whatsitcodes.stopclipping] = flushers.stopclipping, + -- [whatsitcodes.setstate] = flushers.setstate, + -- }, checkagain ) + + -- -- sparse + + -- flushers.whatsit = setmetatableindex ( { + -- [whatsitcodes.latelua] = flushlatelua, + -- [whatsitcodes.userdefined] = flushuserdefined, + -- [whatsitcodes.savepos] = flushsavepos, + -- [whatsitcodes.open] = flushopenout, + -- [whatsitcodes.close] = flushcloseout, + -- [whatsitcodes.write] = flushwriteout, + -- }, checkagain ) + + -- -- delayed + + local whatsit ; whatsit = setmetatableindex ( { + [whatsitcodes.literal] = flushers.literal or function(...) return checkagain(whatsit,whatsitcodes.literal )(...) end, + [whatsitcodes.latelua] = flushlatelua, + [whatsitcodes.userdefined] = flushuserdefined, + [whatsitcodes.savepos] = flushsavepos, + [whatsitcodes.save] = flushers.save or function(...) return checkagain(whatsit,whatsitcodes.save )(...) end, + [whatsitcodes.restore] = flushers.restore or function(...) return checkagain(whatsit,whatsitcodes.restore )(...) end, + [whatsitcodes.setmatrix] = flushers.setmatrix or function(...) return checkagain(whatsit,whatsitcodes.setmatrix )(...) end, + [whatsitcodes.open] = flushopenout, + [whatsitcodes.close] = flushcloseout, + [whatsitcodes.write] = flushwriteout, + [whatsitcodes.startmatrix] = flushers.startmatrix or function(...) return checkagain(whatsit,whatsitcodes.startmatrix )(...) end, + [whatsitcodes.stopmatrix] = flushers.stopmatrix or function(...) return checkagain(whatsit,whatsitcodes.stopmatrix )(...) end, + [whatsitcodes.startscaling] = flushers.startscaling or function(...) return checkagain(whatsit,whatsitcodes.startscaling )(...) end, + [whatsitcodes.stopscaling] = flushers.stopscaling or function(...) return checkagain(whatsit,whatsitcodes.stopscaling )(...) end, + [whatsitcodes.startrotation] = flushers.startrotation or function(...) return checkagain(whatsit,whatsitcodes.startrotation )(...) end, + [whatsitcodes.stoprotation] = flushers.stoprotation or function(...) return checkagain(whatsit,whatsitcodes.stoprotation )(...) end, + [whatsitcodes.startmirroring] = flushers.startmirroring or function(...) return checkagain(whatsit,whatsitcodes.startmirroring)(...) end, + [whatsitcodes.stopmirroring] = flushers.stopmirroring or function(...) return checkagain(whatsit,whatsitcodes.stopmirroring )(...) end, + [whatsitcodes.startclipping] = flushers.startclipping or function(...) return checkagain(whatsit,whatsitcodes.startclipping )(...) end, + [whatsitcodes.stopclipping] = flushers.stopclipping or function(...) return checkagain(whatsit,whatsitcodes.stopclippin )(...) end, + [whatsitcodes.setstate] = flushers.setstate or function(...) return checkagain(whatsit,whatsitcodes.setstate )(...) end, + }, checkagain) + + flushers.whatsit = whatsit + + flushers.pushleaderlevel = pushleaderlevel + flushers.popleaderlevel = popleaderlevel + + end + +end + function drivers.install(specification) local name = specification.name if not name then @@ -77,6 +221,7 @@ function drivers.install(specification) report("no flushers for driver %a",name) return end + installwhatsits(name,flushers) -- report("driver %a is installed",name) setmetatableindex(actions, defaulthandlers) setmetatableindex(flushers, function() return dummy end) |