मिडियाविकि:TibetanTranslit.js

/*
This script is a modified version of Alex benenson's cyrillic translitarator and user Tatari's devnagari transliterator  this verstion is created by user Eukesh 
*/
var amhaHash='{"k":"ཀ","ཀh":"ཁ","g":"ག","ནg":"ང","c":"ཅ","ཅh":"ཆ","j":"ཇ","ནy":"ཉ","t":"ཏ","ཏh":"ཐ","d":"ད","n":"ན","p":"པ","པh":"ཕ","b":"བ","m":"མ","ཏs":"ཙ","ཙh":"ཚ","དz":"ཛ","w":"ཝ","z":"ཟ","ཟh":"ཞ","A":"འ","y":"ཡ","r":"ར","l":"ལ","སh":"ཤ","s":"ས","h":"ཧ",';
amhaHash+='"a":"ཨ","I":"ཨི","U":"ཨུ","E":"ཨེ","O":"ཨོ","i":"ི","u":"ུ","e":"ེ","o":"ོ","0":"༠","1":"༡","2":"༢","3":"༣","4":"༤","5":"༥","6":"༦","7":"༧","8":"༨","9":"༩"}';
     



// for compatibility with bookmarklets
function cyr_translit(src) {
	return to_cyrillic(src);
}

var conversionHash = undefined;
var maxcyrlength = 0;

function getConversionHash() {
	if (conversionHash == undefined) {
		conversionHash = eval("("+amhaHash+")");
		 maxcyrlength=6;
	}

	return conversionHash;
}


function to_cyrillic(src, output, chunks) {
	if (src == undefined || src == "" || src == null)
		return src;
	if (output == undefined)
		output = new String();

	var hash = getConversionHash();
	
	var location = 0;
	
	while (location < src.length) {
		var len = Math.min(maxcyrlength, src.length - location);
		var arr = undefined;
		var sub;
		while (len > 0) {
			sub = src.substr(location, len);
			arr = hash[sub];
			if (arr != undefined) 
				break;
			else 
				len--;
		}
		
		// need this for translit on the fly
		if (chunks != undefined)
			chunks[chunks.length] = sub;
			
		if (arr == undefined) {
			output += sub;
			location ++;
		}
		else {

			// case analysis
			var newChar = arr;
			
			if (sub.toLowerCase() == sub.toUpperCase() && arr.length > 1 && arr[1] && (newChar.toUpperCase() != newChar.toLowerCase())) {
			
				// need translit hash to determine if previous character (and possibly the one before it) 
				// were converted and are in upper case
				
				// set prevDud to true previous is not a translated character or simply a blank
				// set prevCap to true if previous was translated and was upper case

				var prevCh = output.length == 0 ? null : output.substr(output.length - 1, 1);
				var prevDud = !prevCh || !getTranslitString(prevCh);
				var prevCap = (!prevDud && prevCh == prevCh.toUpperCase());

				// sub is caseless but result isn't. case will depend on lookbehind and lookahead
				if (prevDud || !prevCap) {
					output += newChar.toLowerCase();
					prevCap = false;
				}
				else {
					var next = " ";
					if (location + len < src.length)
						next = src.substr(location + len, 1);

					if (next != next.toUpperCase() && next == next.toLowerCase() ) {
						//next is lowercase (and not caseless)
						output += newChar.toLowerCase();
					}
					else if (next == next.toUpperCase() && next != next.toLowerCase() ) {
						// next is uppercase (and not caseless)
						output += newChar.toUpperCase();
					}
					else {
						// next is caseless. output case determined by the case of output[length - 2]
						var pprevCh = output.length == 1 ? null : output.substr(output.length - 2, 1);
						var pprevDud = !pprevCh || !getTranslitString(pprevCh);
						if (!pprevDud && (pprevCh == pprevCh.toUpperCase())) {
							//pre-prev is in upper case. output is also uppercase
							output += newChar.toUpperCase();
						}
						else {
						    output += newChar.toLowerCase();
						}
						
					}
				}
					
			}
			else if ((sub.toLowerCase() == sub.toUpperCase()) && (arr.length < 2 || !arr[1])) {
				
				// literal treatment of newChar
				output += newChar;

			}
			else if (sub != sub.toLowerCase()) {
			
				// sub not all-lowercase
				output += newChar.toUpperCase();
			}
			else {
					
					
					
				// sub is lowercase
			    output += newChar.toLowerCase();
			}
			location += len;
		}
	}
	
	return output;
}



function convertIt(src,converter){
 var resultbuffer=""; 
	for(var i=0;i<src.length;i++){
	resultbuffer=converter(resultbuffer+src[i]);
	}
        return converter(resultbuffer);

}



var translitHash = undefined;

function initTranslit() {
	if (translitHash == undefined) {
		translitHash = new Array();

		for (var i = 0; i < conversionHash.length; i++) {
			var ch = conversionHash[i][1];
			// if the translit string is not caseless, convert cyr string to upper case
			// otherwise maintain its case
			if (conversionHash[i][0].toUpperCase() != conversionHash[i][0].toLowerCase())
				ch = ch.toUpperCase();
				
			if (translitHash[ch] == undefined)
				translitHash[ch] = conversionHash[i][0];
		}
	}
}




//-- translit on-the-fly -- 

function replaceValue(node, value, stepback) {
	if (stepback == undefined)
		stepback = 0;
		
	if (isExplorer()) {
		var range = document.selection.createRange();
		range.moveStart("character", -stepback);
		range.text = value;
		range.collapse(false);
		range.select();
	}
	else {
		var scrollTop = node.scrollTop;
		var cursorLoc =  node.selectionStart;
		node.value = node.value.substring(0, node.selectionStart - stepback) + value + 
                node.value.substring(node.selectionEnd, node.value.length);
		node.scrollTop = scrollTop;
		node.selectionStart = cursorLoc + value.length - stepback;
		node.selectionEnd = cursorLoc + value.length - stepback;
	}
}


// compare positions
function positionIsEqual(other) {
	if (isExplorer())
		return this.position.isEqual(other.position);
	else
		return this.position == other.position;
  
}

function Position(node) {
  if (node.selectionStart != undefined)
	this.position = node.selectionStart;
  else if (document.selection && document.selection.createRange())
    this.position = document.selection.createRange();
    
  this.isEqual = positionIsEqual;
}

function resetState() {
	this.position = new Position(this.node);
	this.transBuffer = "";
	this.cyrBuffer = "";
}

function StateObject(node) {
	this.node = node;
	this.reset = resetState;
	this.cyrBuffer = "";
	this.transBuffer = "";
	this.position = new Position(node);
}


var stateHash = new Array();

function isExplorer() {
  return (document.selection != undefined && document.selection.createRange().isEqual != undefined);
}

function pressedKey(event) {
  if (isExplorer())
	return event.keyCode;
  else
    return event.which;
}

function translitonkey(event) {
     /*
	if ((event.keyCode == 255 && event.charCode > 0) || event.keyCode == 8) {
		return;
	}
    */
    
    if (event == undefined)
		event = window.event;
    
	var node = null;
	if (event.target)
		node = event.target;
	else if (event.srcElement)
		node = event.srcElement;
		
	
	
	// initialize state
	var state = stateHash[node];
	if (state == null) {
		state = new StateObject(node);
		stateHash[node] = state;
	}
	if ( (pressedKey(event) > 20) && !event.ctrlKey && !event.altKey && !event.metaKey) {

		var c = String.fromCharCode(pressedKey(event));

		// process input
		var result = process_translit(state, c);
		// finish up
		if (c != result.out || result.replace != 0) {
		  if (isExplorer())
			event.returnValue = false;
		  else
		    event.preventDefault();
		  
		  replaceValue(node, result.out, result.replace);
		  
		  state.position = new Position(node);

		}
	}
	
}

function TranslitResult() {
	this.out = "";
	this.replace = 0;
}

function process_translit(state, c) {
	// reset state if position changed
	if (!state.position.isEqual(new Position(state.node)))
		state.reset();
		
	var result = new TranslitResult();
	
	// initial backbuffer. Add to it as characters are converted
	var backbuffer = getBackBuffer(state.node, state.cyrBuffer.length, 2);
	var chunks = new Array();
	
	state.transBuffer = state.transBuffer+ c

	var str = to_cyrillic(state.cyrBuffer+c, backbuffer, chunks);

	// remove backbuffer from output
	str = str.substr(backbuffer.length);
	result.out = str; 
	/* str is now left alone - it has the output matching contents of chunks and 
	   will be used to reinitialize backbuffers, along with chunks and state.transBuffer
	*/
	
	// get the difference between state.cyrBuffer and output
	for (var i = 0; i < Math.min(state.cyrBuffer.length, result.out.length); i++) {
		if (state.cyrBuffer.substr(i, 1) != result.out.substr(i, 1)) {
			result.replace = state.cyrBuffer.length - i;
			result.out = result.out.substr(i);
			break;
		}
	}
	if (result.replace == 0) {
               if(result.out.length<state.cyrBuffer.length)
				result.replace=state.cyrBuffer.length- result.out.length;
		result.out = result.out.substr(Math.min(state.cyrBuffer.length, result.out.length));
                 
                       //    result.out+="\u0008"
                         
	}
	
	// update state: backbuffer, bufferArray
	if (chunks.length > 0 && chunks[chunks.length - 1] == result.out.substr(result.out.length - 1)) {
		// no convertion took place, reset state
		state.reset();
	}
	else {
		while (state.transBuffer.length > maxcyrlength) {
			state.transBuffer = state.transBuffer.substr(chunks[0].length);
			chunks.shift();
			str = str.substr(1);
		}
		state.cyrBuffer = str;
	}
	return result;
}

function getBackBuffer(node, offset, count) {
		
	if (isExplorer()) { //.tagName.toUpperCase() == "EDITOR") {
	
		var range = document.selection.createRange();
		range.moveStart("character", -offset);
		var result = range.text.substr(-count);
		if (!result)
			result = "";
			
		return result;

	} else {
		return node.value.substring(0, node.selectionStart - offset).substr(-count);
	}
}

// need this for bookmarklets
function getSelectedNode() {
  if (document.activeElement)
	return document.activeElement;
  else
    if (window.getSelection && window.getSelection() && window.getSelection().rangeCount > 0) {
		var range = window.getSelection().getRangeAt(0);
		if (range.startContainer && range.startContainer.childNodes && range.startContainer.childNodes.length > range.startOffset)
			return range.startContainer.childNodes[range.startOffset]
    }
  return null;
}

function toggleCyrMode() {
	var node = getSelectedNode();
	if (node) {
		if (stateHash[node]) {
			if (removeKeyEventListener(node))
				delete stateHash[node];
		}
		else {
			if (addKeyEventListener(node))
				stateHash[node] = new StateObject(node);
		}
	}
}

function addKeyEventListener(node) {
	if (node.addEventListener)
		node.addEventListener("keypress", translitonkey, false);
	else if (node.attachEvent)
	    node.attachEvent("onkeypress", translitonkey);
	else return false;
	return true;
}
function removeKeyEventListener(node) {
	if (node.removeEventListener)
		node.removeEventListener("keypress", translitonkey, false);
	else if (node.detachEvent)
		node.detachEvent("onkeypress", translitonkey);
	else return false;
	return true;
}

function getSelectedText() {
	if (isExplorer()) {
		return document.selection.createRange().text;
	}
	else {
		var node = getSelectedNode();
		if (node && node.value && node.selectionStart != undefined && node.selectionEnd != undefined)
			return node.value.substring(node.selectionStart, node.selectionEnd);
	}
	return "";
}