var supported=(document.all||document.getElementById);
var disabled=false;
var charmapid=1;
var keymodeid=1;
var linebreak=0;
var theTyper=null;
reset=function(){}
initTyper=telexingVietUC;
function setTypingMode(mode){
keymodeid=mode;
if(theTyper)theTyper.keymode=initKeys();
if(!supported&&!disabled){
alert("Xin loi, trinh duyet web cua ban khong cho phep dung VietTyping.\n");
disabled=true;}}
initCharMap=function(){return new CVietUniCodeMap();}
initKeys=function(){
switch(keymodeid){
case 1:return new CTelexKeys();
case 2:return new CVniKeys();
case 3:return new CViqrKeys();
case 4:return new CAllKeys();
default:return new CVKOff();}}
function telexingVietUC(txtarea){
txtarea.vietarea=true;
txtarea.onkeyup=null;
if(!supported)return;
txtarea.onkeypress=vietTyping;
txtarea.getCurrentWord=getCurrentWord;
txtarea.replaceWord=replaceWord;
txtarea.onkeydown=onKeyDown;
txtarea.onmousedown=onMouseDown;
txtarea.getValue=function(){return this.value;}
txtarea.setValue=function(txt){this.value=txt;}
if(!theTyper)theTyper=new CVietString("");}
function getEvt(evt,external){
if(external)return external.event.keyCode;
if(typeof(evt)=='string')return evt.charCodeAt(0);
return document.all?event.keyCode:(evt&&evt.which)?evt.which:0;}
function onKeyDown(evt){
var c=getEvt(evt,this.win);
if(this.id=="SP1234"){if((c==10)||(c==13)){return AdvSearch();}}
if((c==10)||(c==13)){reset(1);linebreak=1;}
else if((c<49)&&(c!=16)&&(c!=20)){linebreak=0;reset(c==32);}
return true;}
function onMouseDown(evt){reset(0);linebreak=0;return true;}
function vietTyping(evt){
var c=getEvt(evt,this.win);
theTyper.value=this.getCurrentWord();
var changed=((c>32)&&theTyper.typing(c));
if(changed)this.replaceWord(theTyper.value);
return!changed;}
function getCurrentWord(){
if(!document.all)return this.value;
var caret=this.document.selection.createRange();
if(caret.text)return null;
var backward=-10;do{
var caret2=caret.duplicate();
caret2.moveStart("character",backward);
outside=/[\x01-\x40]([^\x01-\x40]+)$/.exec(caret2.text);
if(outside)backward=-outside[1].length;
}while(outside&&backward<0);
this.curword=caret2.duplicate();
return caret2.text;}
function replaceWord(newword){
if(!document.all){this.value=newword;return;}
this.curword.text=newword;
this.curword.collapse(false);}
function CVietString(str){
this.value=str;
this.keymode=initKeys();
this.charmap=initCharMap();
this.ctrlchar='-';
this.changed=0;
this.typing=typing;
this.Compose=Compose;
this.Correct=Correct;
this.findCharToChange=findCharToChange;
return this;}
function typing(ctrl){
this.changed=0;
this.ctrlchar=String.fromCharCode(ctrl);
if(linebreak)linebreak=0;else this.keymode.getAction(this);
this.Correct();
return this.changed;}
function Compose(type){
if(!this.value)return;
var info=this.findCharToChange(type);
if(!info||!info[0])return;
var telex;
if(info[0]=='\\')telex=[1,this.ctrlchar,1];
else if(type>6)telex=this.charmap.getAEOWD(info[0],type,info[3]);
else telex=this.charmap.getDau(info[0],type);
if(!(this.changed=telex[0]))return;
this.value=this.value.replaceAt(info[1],telex[1],info[2]);
if(!telex[2]){spellerror=1;this.value+=this.ctrlchar;}}
function Correct(){
if(this.charmap.maxchrlen||!document.all)return 0;
var tmp=this.value;
if('nNcC'.indexOf(this.ctrlchar)>=0)tmp+=this.ctrlchar;
var er=/[^\x01-\x7f](hn|hc|gn)$/i.exec(tmp);
if(er){
this.value=tmp.substring(0,tmp.length-2)+er[1].charAt(1)+er[1].charAt(0);
this.changed=1;}
else if(!this.changed)return 0;
er=/\w([^\x01-\x7f])(\w*)([^\x01-\x7f])\S*$/.exec(this.value);
if(!er)return 0;
var i=this.charmap.isVowel(er[1]);
var ri=(i-1)%24+1,ci=(i-ri)/24;
var i2=this.charmap.isVowel(er[3]);
if(!ci||!i2)return 0;
var ri2=(i2-1)%24+1,ci2=(i2-ri2)/24;
var nc=this.charmap.charAt(ri)+er[2]+this.charmap.charAt(ci*24+ri2);
this.value=this.value.replace(new RegExp(er[1]+er[2]+er[3],'g'),nc);}
function findCharToChange(type){
var lastchars=this.charmap.lastCharsOf(this.value,5);
var i=0,c=lastchars[0][0],chr=0;
if(c=='\\')return[c,this.value.length-1,1];
if(type==15)while(!(chr=this.charmap.isVD(c))){
if((c<'A')||(i>=4)||!(c=lastchars[++i][0]))return null;}
else while("cghmnptCGHMNPT".indexOf(c)>=0){
if((c<'A')||(i>=2)||!(c=lastchars[++i][0]))return null;}
c=lastchars[0][0].toLowerCase();
var pc=lastchars[1][0].toLowerCase();
var ppc=lastchars[2][0].toLowerCase();
if(i==0&&type!=15){
if((chr=this.charmap.isVowel(lastchars[1][0]))
&&("uyoia".indexOf(c)>=0)&&!this.charmap.isUO(pc,c)
&&!((pc=='o'&&c=='a')||(pc=='u'&&c=='y'))
&&!((ppc=='q'&&pc=='u')||(ppc=='g'&&pc=='i')))++i;
if(c=='a'&&(type==9||type==7))i=0;}
c=lastchars[i][0];
if((i==0||chr==0)&&type!=15)chr=this.charmap.isVowel(c);
if(!chr)return null;
var clen=lastchars[i][1],isuo=0;
if((i>0)&&(type==7||type==8||type==11)){
isuo=this.charmap.isUO(lastchars[i+1][0],c);
if(isuo){chr=isuo;clen+=lastchars[++i][1];isuo=1;}}
var pos=this.value.length;
for(var j=0;j<=i;j++)pos-=lastchars[j][1];
return[chr,pos,clen,isuo];}
function CVietCharMap(){
this.vietchars=null;
this.length=149;
this.chr_cache=new Array(20);
this.ind_cache=new Array(20);
this.cptr=0;
this.caching=function(chr,ind){
this.chr_cache[this.cptr]=chr;
this.ind_cache[this.cptr++]=ind;
this.cptr%=20;}
return this;}
CVietCharMap.prototype.charAt=function(ind){
var chrcode=this.vietchars[ind];
return chrcode?String.fromCharCode(chrcode):null;}
CVietCharMap.prototype.isVowel=function(chr){
var i=0;
while((i<20)&&(chr!=this.chr_cache[i]))++i;
if(i<20)return this.ind_cache[i];
i=this.length-5;
while((chr!=this.charAt(i))&&i)--i;
this.caching(chr,i);
return i;}
CVietCharMap.prototype.isVD=function(chr){
var ind=this.length-5;
while((chr!=this.charAt(ind))&&(ind<this.length))++ind;
return(ind<this.length)?ind:0;}
CVietCharMap.prototype.isUO=function(c1,c2){
if(!c1||!c2)return 0;
var ind1=this.isVowel(c1);
var ci=(ind1-1)%12;
if((ci!=9)&&(ci!=10))return 0;
var ind2=this.isVowel(c2);
ci=(ind2-1)%12;
if((ci!=6)&&(ci!=7)&&(ci!=8))return 0;
return[ind1,ind2];}
CVietCharMap.prototype.getDau=function(ind,type){
var accented=(ind<25)?0:1;
var ind_i=(ind-1)%24+1;
var charset=(type==6)?0:type;
if((type==6)&&!accented)return[0];
var newind=charset*24+ind_i;
if(newind==ind)newind=ind_i;
var chr=this.charAt(newind);
if(!chr)chr=this.lowerCaseOf(0,newind);
return[1,chr,newind>24||type==6];}
var map=[
[7,7,7,8,8,8,9,10,11,15],
[0,3,6,0,6,9,0,3,6,0],
[1,4,7,2,8,10,1,4,7,1]
];
CVietCharMap.prototype.getAEOWD=function(ind,type,isuo){
var c=0,i1=isuo?ind[0]:ind;
var vc1=(type==15)?(i1-1)%2:(i1-1)%12;
if(isuo){
var base=ind[1]-(ind[1]-1)%12;
if(type==7||type==11)c=this.charAt(i1-vc1+9)+this.charAt(base+7);
else if(type==8)c=this.charAt(i1-vc1+10)+this.charAt(base+8);
return[c!=0,c,1];}
var i=-1,shift=0,del=0;
while(shift==0&&++i<map[0].length){
if(map[0][i]==type){
if(map[1][i]==vc1)shift=map[2][i]-vc1;
else if(map[2][i]==vc1)shift=map[1][i]-vc1;}}
if(shift==0){
if(type==7&&(vc1==2||vc1==8))shift=-1;
else if((type==9&&vc1==2)||(type==11&&vc1==8))shift=-1;
else if(type==8&&(vc1==1||vc1==7))shift=1;
del=1;
}else del=(shift>0);
i1+=shift;
var chr=this.charAt(i1);
if(i1<145)this.caching(chr,i1);
if(!chr)chr=this.lowerCaseOf(0,i1);
return[shift!=0,chr,del];}
CVietCharMap.prototype.lastCharsOf=function(str,num){
if(!num)return[str.charAt(str.length-1),1];
var vchars=new Array(num);
for(var i=0;i<num;i++){vchars[i]=[str.charAt(str.length-i-1),1];}
return vchars;}
String.prototype.replaceAt=function(i,newchr,clen){
return this.substring(0,i)+newchr+this.substring(i+clen);}
function CVietUniCodeMap(){var map=new CVietCharMap();
map.vietchars=new Array(
"UNICODE",
97,226,259,101,234,105,111,244,417,117,432,121,
65,194,258,69,202,73,79,212,416,85,431,89,
225,7845,7855,233,7871,237,243,7889,7899,250,7913,253,
193,7844,7854,201,7870,205,211,7888,7898,218,7912,221,
224,7847,7857,232,7873,236,242,7891,7901,249,7915,7923,
192,7846,7856,200,7872,204,210,7890,7900,217,7914,7922,
7841,7853,7863,7865,7879,7883,7885,7897,7907,7909,7921,7925,
7840,7852,7862,7864,7878,7882,7884,7896,7906,7908,7920,7924,
7843,7849,7859,7867,7875,7881,7887,7893,7903,7911,7917,7927,
7842,7848,7858,7866,7874,7880,7886,7892,7902,7910,7916,7926,
227,7851,7861,7869,7877,297,245,7895,7905,361,7919,7929,
195,7850,7860,7868,7876,296,213,7894,7904,360,7918,7928,
100,273,68,272);
return map;}
function CVietKeys(){
this.getAction=function(typer){
var i=this.keys.indexOf(typer.ctrlchar.toLowerCase());
if(i>=0)typer.Compose(this.actions[i]);}
return this;}
function CVKOff(){
this.off=true;
this.getAction=function(){};
return this;}
function CTelexKeys(){
var k=new CVietKeys();
k.keys="sfjrxzaeowd";
k.actions=[1,2,3,4,5,6,9,10,11,8,15];
k.istelex=true;
return k;}
function CVniKeys(){
var k=new CVietKeys();
k.keys="0123456789";
k.actions=[6,1,2,4,5,3,7,8,8,15];
return k;}
function CViqrKeys(){
var k=new CVietKeys();
k.keys="\xB4/'\u2019`.?~-^(*+d";
k.actions=[1,1,1,1,2,3,4,5,6,7,8,8,8,15];
return k;}
function CAllKeys(){
var k=new CVietKeys();
k.keys="sfjrxzaeowd0123456789\xB4/'`.?~-^(*+d";
k.actions=[1,2,3,4,5,6,9,10,11,8,15,6,1,2,4,5,3,7,8,8,15,1,1,1,2,3,4,5,6,7,8,8,8,15];
k.istelex=true;
return k;}