मिडियाविकि:Devtest.js

*/

var consonants = {"ക":"ക","ഖ":"ഖ","ഗ":"ഗ","ഘ":"ഘ","ങ":"ങ","ച":"ച","ഛ":"ഛ","ജ":"ജ","ഝ":"ഝ","ഞ":"ഞ","ട":"ട","ഠ":"ഠ","ഡ":"ഡ","ഢ":"ഢ","ണ":"ണ","ത":"ത","ഥ":"ഥ","ദ":"ദ","ധ":"ധ","ന":"ന","പ":"പ","ഫ":"ഫ","ബ":"ബ","ഭ":"ഭ","മ":"മ","യ":"യ","ര":"ര","ല":"ല","വ":"വ","ശ":"ശ","ഷ":"ഷ","സ":"സ","ഹ":"ഹ","ള":"ള","ഴ":"ഴ","റ":"റ","റ്റ":"റ്റ"};
var chillaksharam = {"ണ്‍":"ണ","ന്‍":"ന","ം":"മ","ര്‍":"ര","ല്‍":"ല","ള്‍":"ള","്\\u200D":""};

var vowels = '"്a":"","്e":"െ","്i":"ി","്o":"ൊ","്u":"ു","്A":"ാ","്E":"േ","്I":"ീ","്O":"ോ","്U":"ൂ","്Y":"ൈ","െe":"ീ","ൊo":"ൂ","ിi":"ീ","ിe":"ീ","ുu":"ൂ","ുo":"ൂ","്r":"്ര്",';
var roman = '"k":"ക്","ക്h":"ഖ്","g":"ഗ്","ഗ്h":"ഘ്","ന്‍g":"ങ്","c":"ക്\\u200D","ക്\\u200Dh":"ച്","ച്h":"ഛ്","j":"ജ്","ജ്h":"ഝ്","ന്‍j":"ഞ്","ന്‍h":"ഞ്","T":"ട്","ട്h":"ഠ്","D":"ഡ്","ഡ്h":"ഢ്","റ്റ്h":"ത്","ത്h":"ഥ്","d":"ദ്","ദ്h":"ധ്","p":"പ്","പ്h":"ഫ്","f":"ഫ്","b":"ബ്","ബ്h":"ഭ്","y":"യ്","v":"വ്","w":"വ്","z":"ശ്","S":"ശ്","സ്h":"ഷ്","s":"സ്","h":"ഹ്","ശ്h":"ഴ്","x":"ക്ഷ്","R":"റ്","t":"റ്റ്",';
var chill = '"N":"ണ്‍","n":"ന്‍","m":"ം","r":"ര്‍","l":"ല്‍","L":"ള്‍",';
var swaram = '"a":"അ","അa":"ആ","A":"ആ","e":"എ","E":"ഏ","എe":"ഈ","i":"ഇ","ഇi":"ഈ","ഇe":"ഈ","അi":"ഐ","I":"ഐ","o":"ഒ","ഒo":"ഊ","O":"ഓ","അu":"ഔ","ഒu":"ഔ","u":"ഉ","ഉu":"ഊ","U":"ഊ","H":"ഃ","റ്h":"ഋ","ര്‍^":"ഋ","ഋ^":"ൠ","ല്‍^":"ഌ","ഌ^":"ൡ",';
var numerals = '"1":"൧","2":"൨","3":"൩","4":"൪","5":"൫","6":"൬","7":"൭","8":"൮","9":"൯","0":"൦",';
var conjuncts = '"ന്‍t":"ന്റ്","ന്റ്h":"ന്ത്","ന്‍k":"ങ്ക്","ന്‍n":"ന്ന്","ണ്‍N":"ണ്ണ്","ള്‍L":"ള്ള്","ല്‍l":"ല്ല്","ംm":"മ്മ്","ന്‍m":"ന്മ്","ന്ന്g":"ങ്ങ്","ന്‍d":"ന്ദ്","ണ്‍m":"ണ്മ്","ല്‍p":"ല്പ്","ംp":"മ്പ്","റ്റ്t":"ട്ട്","ന്‍T":"ണ്ട്","ണ്‍T":"ണ്ട്","്ര്^":"ൃ","ന്‍c":"ന്‍\\u200D","ന്‍\\u200Dh":"ഞ്ച്","ണ്‍D":"ണ്ഡ്",';
var others = '"്L":"്ല്","~":"്\\u200C","്~":"്\\u200C","\\u200C~":"\\u200C","ം~":"മ്","ക്\\u200Dc":"ക്ക്\\u200D","ക്ക്\\u200Dh":"ച്ച്","q":"ക്യൂ",';
var caps = '"B":"ബ്ബ്","C":"ക്ക്\\u200D","F":"ഫ്","G":"ഗ്ഗ്","J":"ജ്ജ്","K":"ക്ക്","M":"മ്മ്","P":"പ്പ്","Q":"ക്യൂ","V":"വ്വ്","W":"വ്വ്","X":"ക്ഷ്","Y":"യ്യ്","Z":"ശ്ശ്",';
var ZWNJ = '"_":"\\u200C"';

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

var conversionHash = undefined;
var maxcyrlength = 0;

function getConversionHash() {
    if (conversionHash == undefined) {
        // TODO
        var opr = "{" + vowels + roman + chill + swaram + numerals + conjuncts + caps + others;
        for (var consonant in consonants) {
	        opr += '"' + consonant + 'a":"' + consonant + 'ാ",';
	        opr += '"' + consonant + 'e":"' + consonant + 'േ",';
	        opr += '"' + consonant + 'i":"' + consonant + 'ൈ",';
	        opr += '"' + consonant + 'o":"' + consonant + 'ോ",';
	        opr += '"' + consonant + 'u":"' + consonant + 'ൗ",';
        }
		
        for (var chk in chillaksharam) {
            opr += '"' + chk + 'a":"' + chillaksharam[chk] + '",';
            opr += '"' + chk + 'e":"' + chillaksharam[chk] + 'െ",';
            opr += '"' + chk + 'i":"' + chillaksharam[chk] + 'ി",';
            opr += '"' + chk + 'o":"' + chillaksharam[chk] + 'ൊ",';
            opr += '"' + chk + 'u":"' + chillaksharam[chk] + 'ു",';
            opr += '"' + chk + 'A":"' + chillaksharam[chk] + 'ാ",';
            opr += '"' + chk + 'E":"' + chillaksharam[chk] + 'േ",';
            opr += '"' + chk + 'I":"' + chillaksharam[chk] + 'ീ",';
            opr += '"' + chk + 'O":"' + chillaksharam[chk] + 'ോ",';
            opr += '"' + chk + 'U":"' + chillaksharam[chk] + 'ൂ",';
            opr += '"' + chk + 'Y":"' + chillaksharam[chk] + 'ൈ",';
            opr += '"' + chk + 'r":"' + chillaksharam[chk] + '്ര്",';
            opr += '"' + chk + 'y":"' + chillaksharam[chk] + '്യ്",';
            opr += '"' + chk + 'v":"' + chillaksharam[chk] + '്വ്",';
            opr += '"' + chk + 'w":"' + chillaksharam[chk] + '്വ്",';
            opr += '"' + chk + '~":"' + chillaksharam[chk] + '്\\u200C",';
        }
		
        opr += ZWNJ + "}";
        // var tb = document.getElementById('wpTextbox1');
        // tb.value = opr;
        conversionHash = eval("("+opr+")");
        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 transliterateKey(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", transliterateKey, false);
    else if (node.attachEvent)
        node.attachEvent("onkeypress", transliterateKey);
    else return false;
    return true;
}
function removeKeyEventListener(node) {
    if (node.removeEventListener)
        node.removeEventListener("keypress", transliterateKey, false);
    else if (node.detachEvent)
        node.detachEvent("onkeypress", transliterateKey);
    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 "";
}


/* calling functions  */

        function addLoadEvent(func) {
            
            if (window.addEventListener) 
                window.addEventListener("load", func, false);
            else if (window.attachEvent) 
                window.attachEvent("onload", func);
        }

        function addTranslit(editForm,textBox) {
            checkrt(editForm); // check for translit support

            if (textBox.addEventListener) 
                textBox.addEventListener("keypress", processKeys, false);
            else if (textBox.attachEvent) 
                textBox.attachEvent("onkeypress", processKeys);
        }

        function addTextEvent() {
            var editForm =document.getElementById('editform');
            if(editForm != null) {
                var textBox=document.getElementById('wpTextbox1');
                var textSummary = document.getElementById('wpSummary');
                addTranslit(editForm,textBox);
                addCheckbox(editForm,textBox ); 
                if(textSummary) { addTranslit(editForm,textSummary); }
            }

            // add transliteration feature to search form also
            var searchform = document.getElementById('searchform');
            var searchInput = document.getElementById('searchInput');
            if(searchInput) { addTranslit(searchform,searchInput); }
        }

        function addCheckbox(editform,textBox) {
            var element = document.createElement("input");
            element.setAttribute("type","checkbox");
            element.setAttribute("id","realtime");

            if (element.addEventListener) 
                element.addEventListener("click", rtClick, false);
            else if (element.attachEvent) 
                element.attachEvent("onclick", rtClick);

            var labelcheckBox = document.createTextNode(' മലയാളം എഴുതുവാന്‍ ഈ ഉപാധി സ്വീകരിക്കുക - Use Ctrl + M to Toggle.');
            editform.insertBefore(element,textBox);
            document.getElementById("realtime").checked = realTime;
            editform.insertBefore(labelcheckBox,textBox);
            var p = document.createElement("p");
            p.setAttribute("style","width:100%;height:1px;");
            editform.insertBefore(p,textBox);
        }

        var imeStatus = false;
        
        function processKeys(event) {
            if (rtsupported) {
                e = event || window.event;
                if ((e.keyCode == 13 && e.ctrlKey) || (e.which == 109 && e.ctrlKey))
	            {
		            realTime = !realTime;
					var chk = document.getElementById('realtime');
					if (chk) { chk.checked = realTime; }
	                return false;
	            }
	            
	            else if ((e.keyCode >= 3328 && e.keyCode <= 3455) || (e.which >= 3328 && e.which <= 3455)) {
	                var chk = document.getElementById('realtime');
	                if (imeStatus == false || realTime) {
	                    realTime = false;
					    if (chk) { chk.checked = realTime; }
					    imeStatus = true;
					    alert('A Malayalam input tool was detected. Disabling in-built transliteration. To turn it On again use Ctrl+M');
					    return false;
					}
	            }
                            
                else if (realTime) {
                    imeStatus = false;
                    transliterateKey(event); // call transliteration function
                }
            } 
        }
        var realTime = true;

        function rtClick(event) {
            realTime = !realTime;
        }

        var rtsupported = false;
        var error; 

        function checkrt(editform) {
            try {
        	
            /*
            var nav = navigator.userAgent.toUpperCase();
            rtsupported = (nav.indexOf("GECKO") >= 0 || nav.indexOf("OPERA") >= 0 || nav.indexOf("SAFARI") >= 0);
            */
        	
                rtsupported = (document.selection != undefined)
        		
                if (!rtsupported) {
	                var element = document.createElement("TEXTAREA");
	                editform.appendChild(element);
        			
	                if (element.selectionStart != undefined)
		                rtsupported = true;
		                editform.removeChild(element);
                }
        		
            } catch (error) {}
        }

        addLoadEvent(addTextEvent);
/*
</pre></nowiki>
*/