var agt=navigator.userAgent.toLowerCase()
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1))
var obj_copy, method=1, on_off=1, changed=false
var typicalKeyCode = new Array(
97, 226, 259, 101, 234, 105, 111, 244, 417, 117, 432, 121,
65, 194, 258, 69, 202, 73, 79, 212, 416, 85, 431, 89);
function notWord(word) {
return ("\ \r\n#,\\;.:-_()<>+-*/=?!\"$%{}[]\'~|^\@\&".indexOf(word)>=0)
}
function start(obj, key) {
var uni
obj_copy=obj
if (method==4) uni=uni_auto
else if (method==1) uni=uni_telex
else if (method==2) uni=uni_vni
else if (method==3) uni=uni_viqr
if (!is_ie) {
var i=obj.selectionStart
uni(obj, obj.value.substr(i-3,1), i-2)
i=obj.selectionStart
uni(obj, obj.value.substr(i-2,1), i-1)
i=obj.selectionStart
uni(obj, obj.value.substr(i-1,1), i)
}
else {
var caret=obj.document.selection.createRange()
var word=""
while(1) {
caret.moveStart("character",-1)
if (word.length == caret.text.length) break
word=caret.text
if (notWord(word.charAt(0))) {
if (word.charCodeAt(0)==13) word=word.substr(2)
else word=word.substr(1)
break
}
}
if (word.length) {
caret.collapse(false)
caret.moveStart("character",-word.length)
obj.curword=caret.duplicate()
word=ie_telex(key, word)
obj.curword.text=word
if (changed) {
changed=false
window.event.keyCode = 0
}
}
}
}
function ie_telex(key, word) {
var upkey=key.toUpperCase()
if ('SFJRX'.indexOf(upkey)>=0) {
var return_word=typicalReplace(word, key, null)
if (return_word) return return_word
}
else if (upkey=='D') {
var searchFor=new Array('d', 'D')
pos=findCharToChange(word,key,null,searchFor)
if (pos) {
var charCode=(key=='d')?273:272
return ie_replaceChar(word, pos, charCode)
}
}
else if (upkey=='A') {
var searchFor=new Array('a', 'A')
pos=findCharToChange(word,key,null,searchFor)
if (pos) {
var charCode=(key=='a')?226:194
return ie_replaceChar(word, pos, charCode)
}
}
else if (upkey=='W') {
var charCode
var searchFor=new Array('a','A','o','O','u','U')
pos=findCharToChange(word,key,null,searchFor)
if (pos) {
var poschar=word.substr(word.length-pos,1).toUpperCase()
if (poschar=='A') charCode=(key=='w')?259:258
else if (poschar=='O') charCode=(key=='w')?417:416
else if (poschar=='U') charCode=(key=='w')?432:431
return ie_replaceChar(word, pos, charCode)
}
}
else if (upkey=='E') {
var searchFor=new Array('e','E')
pos=findCharToChange(word,key,null,searchFor)
if (pos) {
var charCode=(key=='e')?234:202
return ie_replaceChar(word, pos, charCode)
}
}
else if (upkey=='O') {
var searchFor=new Array('o','O')
pos=findCharToChange(word,key,null,searchFor)
if (pos) {
var charCode=(key=='o')?244:212
return ie_replaceChar(word, pos, charCode)
}
}
return word
}
function ie_replaceChar(word, pos, charCode) {
changed=true
return word.substr(0,word.length-pos)+String.fromCharCode(charCode)+word.substr(word.length-pos+1)
}
function uni_telex(obj, key, i) {
var pos
var upkey=key.toUpperCase()
if ('SFJRX'.indexOf(upkey)>=0) {
typicalReplace(obj, key, i)
}
else if (upkey=='D') {
var searchFor=new Array('d','D')
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var charCode=(key=='d')?273:272
replaceChar(obj, i-pos, charCode, i)
}
}
else if (upkey=='A') {
var searchFor=new Array('a','A')
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var charCode=(key=='a')?226:194
replaceChar(obj, i-pos, charCode, i)
}
}
else if (upkey=='W') {
var charCode
var searchFor=new Array('a','A','o','O','u','U')
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var poschar=obj.value.substr(i-pos,1).toUpperCase()
if (poschar=='A') charCode=(key=='w')?259:258
else if (poschar=='O') charCode=(key=='w')?417:416
else if (poschar=='U') charCode=(key=='w')?432:431
replaceChar(obj, i-pos, charCode, i)
}
}
else if (upkey=='E') {
var searchFor=new Array('e','E')
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var charCode=(key=='e')?234:202
replaceChar(obj, i-pos, charCode, i)
}
}
else if (upkey=='O') {
var searchFor=new Array('o','O')
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var charCode=(key=='o')?244:212
replaceChar(obj, i-pos, charCode, i)
}
}
}
function findCharToChange(obj, key, i, searchFor) {
var g, str=""
for (g=0; g<searchFor.length; g++) {
str+=searchFor[g]
}
if (!is_ie) {
for (g=2; g<7; g++) {
if (i-g>=0) {
if (notWord(obj.value.substr(i-g, 1))) break
else if (str.indexOf(obj.value.substr(i-g, 1))>=0) return g
}
else break
}
}
else {
for (g=1; g<=obj.length; g++) {
if (str.indexOf(obj.substr(obj.length-g,1))>=0) return g
}
}
return false
}
function typicalReplace(obj, key, i) {
var searchFor=new Array()
for (var g=0; g<typicalKeyCode.length; g++) searchFor.push(String.fromCharCode(typicalKeyCode[g]))
pos=findCharToChange(obj, key, i, searchFor)
if (pos) {
var charCode=returnUniCode(obj, key, i, pos)
if (!is_ie) replaceChar(obj, i-pos, charCode, i)
else return ie_replaceChar(obj, pos, charCode)
}
return false
}
function returnUniCode(obj, key, i, pos) {
var uni_array=returnKeyCode(key.toUpperCase())
var charCode=(!is_ie)?(obj.value.charCodeAt(i-pos)):(obj.charCodeAt(obj.length-pos))
for (var g=0; g<typicalKeyCode.length; g++) if (typicalKeyCode[g]==charCode) return uni_array[g]
}
function returnKeyCode(key) {
if (key=='S') return new Array(225, 7845, 7855, 233, 7871, 237, 243, 7889, 7899, 250, 7913, 253,
193, 7844, 7854, 201, 7870, 205, 211, 7888, 7898, 218, 7912, 221);
else if (key=='F') return new Array(224, 7847, 7857, 232, 7873, 236, 242, 7891, 7901, 249, 7915, 7923,
192, 7846, 7856, 200, 7872, 204, 210, 7890, 7900, 217, 7914, 7922);
else if (key=='J') return new Array(7841, 7853, 7863, 7865, 7879, 7883, 7885, 7897, 7907, 7909, 7921, 7925,
7840, 7852, 7862, 7864, 7878, 7882, 7884, 7896, 7906, 7908, 7920, 7924);
else if (key=='R') return new Array(7843, 7849, 7859, 7867, 7875, 7881, 7887, 7893, 7903, 7911, 7917, 7927,
7842, 7848, 7858, 7866, 7874, 7880, 7886, 7892, 7902, 7910, 7916, 7926);
else if (key=='X') return new Array(227, 7851, 7861, 7869, 7877, 297, 245, 7895, 7905, 361, 7919, 7929,
195, 7850, 7860, 7868, 7876, 296, 213, 7894, 7904, 360, 7918, 7928);
}
function replaceChar(obj, pos, charCode, i) {
var oldlen=obj.value.length
var fix=obj.selectionStart
obj.setSelectionRange(pos, pos+1)
obj.value = obj.value.substr(0, obj.selectionStart) + String.fromCharCode(charCode) + obj.value.substr(obj.selectionEnd)
obj.setSelectionRange(i-1, i)
obj.value = obj.value.substr(0, obj.selectionStart) + obj.value.substr(obj.selectionEnd)
if (fix > i) obj.setSelectionRange(i+(fix-i)-1, i+(fix-i)-1)
else obj.setSelectionRange(i-(oldlen-obj.value.length), i-(oldlen-obj.value.length))
scrollIntoView(obj)
}
function scrollIntoView(obj) {
var factor = 36
if ((obj_copy.scrollHeight <= obj.scrollTop) || (obj_copy.scrollHeight >= obj.scrollTop + obj.offsetHeight))
obj.scrollTop = obj_copy.scrollHeight - obj_copy.offsetHeight + factor;
}
function statusMessage() {
var str='Mode: '
if(!on_off) str+='NONE'
else if(method==1) str+='TELEX'
else if(method==2) str+='VNI'
else if(method==3) str+='VIQR'
else if(method==4) str+='AUTO'
str+=" [F9=TypingMode; F12=On/Off]"
window.status=str
}
document.onkeydown = function(e) {
var key = (!is_ie) ? e.which : window.event.keyCode
if (key==120) {
on_off=true
if (method==4) method=1
else method++
}
else if (key==123) on_off=!on_off
statusMessage()
}
document.onkeyup = function(e) {
if ((!on_off) || (is_ie)) return
var el=e.target
if ((el.type != 'textarea') && (el.type != 'text')) return
start(el, null)
}
document.onkeypress = function() {
if (!is_ie) return
var el=window.event.srcElement
var code=window.event.keyCode
if (((el.type != 'textarea') && (el.type != 'text')) || (!on_off) || (code<47) || (code==145) || (code==255)) return
start(el, String.fromCharCode(window.event.keyCode))
}
statusMessage()
mấy cái chức năng phụ cũng không phức tạp lắm. Cứ từ từ thôi, không vội mà. Cái nào không work được có thể ... bỏ qua, với điều kiện nó không bị xung đột thôi.
