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/* --- GF wide coverage translation interface ------------------------------- */
var gftranslate = {}
gftranslate.jsonurl="/robust/App16.pgf"
gftranslate.grammar="App" // the name of the grammar
gftranslate.documented_classes=
["N", "N2", "N3", "A", "A2", "V", "V2", "VV", "VS", "VQ", "VA", "V3", "V2V",
"V2S", "V2Q", "V2A", "Adv", "Prep"]
gftranslate.call=function(querystring,cont,errcont) {
http_get_json(gftranslate.jsonurl+querystring,cont,errcont)
}
function enc_langs(g,to) {
return Array.isArray(to)
? to.map(function(l){return g+l}).join("+")
: g+to
}
function unspace_translations(g,trans) {
var langs=[g+"Chi",g+"Jpn",g+"Tha"]
for(var i=0;i<trans.length;i++) {
var lins=trans[i].linearizations
if(lins) {
for(var j=0;j<lins.length;j++) {
var lin=lins[j]
if(elem(lin.to,langs)) {
//console.log(i,j,"space",lin.to,lin.text)
lin.text=lin.text.split(" ").join("")
//console.log(i,j,"unspace",lin.to,lin.text)
}
}
}
}
return trans
}
function length_limit(lang) {
switch(lang) {
case "Bul":
case "Chi":
case "Eng":
case "Swe":
return 500
default:
return 200
}
}
function check_limit(lang,source) {
var len=source.length, limit=length_limit(lang)
return len<=limit ? null : "sentense too long, "+len+">"+limit
}
// Translate a sentence
gftranslate.translate=function(source,from,to,start,limit,cont) {
var g=gftranslate.grammar
var lexer="&lexer=text"
if(from=="Chi") lexer="",source=source.split("").join(" ")
function errcont(text,code) { cont([{error:code+" "+text}]) }
function extract(result) {
cont(unspace_translations(g,result[0].translations))
}
var too_long=check_limit(from,source)
if(too_long) cont([{error:too_long}])
else
gftranslate.call("?command=c-translate&jsontree=true&input="
+encodeURIComponent(source)
+lexer+"&unlexer=text&from="+g+from+"&to="+enc_langs(g,to)
+"&start="+start+"&limit="+limit,extract,errcont)
}
// Translate a sentence word for word (if all else fails...)
gftranslate.wordforword=function(source,from,to,cont) {
var g=gftranslate.grammar
var lexer="&lexer=text"
if(from=="Chi") lexer="",source=source.split("").join(" ")
function errcont(text,code) { cont([{error:code+" "+text}]) }
function extract(result) {
cont(unspace_translations(g,result[0].translations))
}
var enc_to = enc_langs(g,to)
var too_long=check_limit(from,source)
if(too_long) cont([{error:too_long}])
else
gftranslate.call("?command=c-wordforword&input="
+encodeURIComponent(source)
+lexer+"&unlexer=text&from="+g+from+"&to="+enc_to
,extract,errcont)
}
// Get list of supported languages
gftranslate.waiting=[]
gftranslate.get_languages=function(cont,errcont) {
function init2(grammar_info) {
var ls=grammar_info.languages
gftranslate.grammar=grammar_info.name
var langs=[], pre=gftranslate.grammar, n=pre.length
for(var i=0;i<ls.length;i++)
if(ls[i].name.substr(0,n)==pre) langs.push(ls[i].name.substr(n))
gftranslate.targetlist=langs
var w=gftranslate.waiting
for (var i=0;i<w.length;i++) w[i].cont(langs)
gftranslate.waiting=[]
}
function init2error(text,status,ct) {
var w=gftranslate.waiting
for (var i=0;i<w.length;i++) {
var e=w[i].errcont
if(e) e(text,status,ct)
}
gftranslate.waiting=[]
}
if(gftranslate.targetlist) cont(gftranslate.targetlist)
else {
gftranslate.waiting.push({cont:cont,errcont:errcont})
if(gftranslate.waiting.length<2)
gftranslate.call("?command=c-grammar",init2,init2error)
}
}
// Get functions to test which source and target langauges are supported
gftranslate.get_support=function(cont,errcont) {
function support(code) { return gftranslate.targets[code] }
function init2(langs) {
gftranslate.targets=toSet(langs)
cont(support,support)
}
if(gftranslate.targets) cont(support,support)
else gftranslate.get_languages(init2,errcont)
}
// trans_text_quality : String -> {quality:String, text:String}
function trans_text_quality(text) {
var quality="default_quality"
switch(text[0]) {
case '+': text=text.substr(1).trimLeft(); quality="high_quality"; break;
case '*': text=text.substr(1).trimLeft(); quality="low_quality"; break;
}
return {quality:quality,text:text}
}
// find_to :: Lang -> [{to:Lang,...}] -> Int
function find_to(to,lins) {
for(var i=0;i<lins.length;i++)
if(lins[i].to==to) return i
return -1 // Hmm....
}
function trans_quality(r,to) {
var ix=to ? find_to(to,r.linearizations) : 0
if(ix<0) return null
else {
var text=r.linearizations[ix].text
if(r.prob==0) return {quality:"high_quality",text:text}
else if(r.prob<0) return {quality:"bad_quality",text:text}
else {
var t=trans_text_quality(text)
if(t.quality=="default_quality" && r.tree && r.tree[0]=="?")
t.quality="low_quality"
return t
}
}
}
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