window.MXOBJ = MXOBJ = window.MXOBJ||{};
MXOBJ.clickableWords = {};

		if (!MXOBJ.isSelectionDisabled) MXOBJ.isSelectionDisabled = function(e) {try{return e.getAttribute('selectionDisabled')==='1';} catch(e) {return false;}};
		if (!MXOBJ.disableSelection) MXOBJ.disableSelection = function(e) {if(null!=e){"undefined"!=typeof e.onselectstart?(e.onselectstart_ORIG=e.onselectstart,e.onselectstart=function(){return!1}):null!=e.style&&"undefined"!=typeof e.style.MozUserSelect?(e.style.MozUserSelect_ORIG=e.style.MozUserSelect,e.style.MozUserSelect="none"):(e.onmousedown_ORIG=e.onmousedown,e.onmousedown=function(){return!1}),null!=e.style&&(e.cursor_ORIG=e.style.cursor,e.style.cursor="default");try{e.setAttribute("selectionDisabled","1")}catch(t){}}};
		if (!MXOBJ.enableSelection) MXOBJ.enableSelection = function(e) {null!=e&&("undefined"!=typeof e.onselectstart?e.onselectstart=e.onselectstart_ORIG:"undefined"!=typeof e.style.MozUserSelect?e.style.MozUserSelect=e.style.MozUserSelect_ORIG:e.onmousedown=e.onmousedown_ORIG,e.style.cursor=e.cursor_ORIG,e.removeAttribute("selectionDisabled"))};
	    MXOBJ.attachEvent = MXOBJ.attachEvent || function(e,t,f) {if (e&&e.addEventListener)e.addEventListener(t, f, true); else e&&e.attachEvent('on'+t, f);};
		if (!MXOBJ.arrayContains) MXOBJ.arrayContains = function(needle, arr) {return (arr.indexOf(needle) > -1);};


// http://stackoverflow.com/questions/7563169/detect-which-word-has-been-clicked-on-within-a-text

MXOBJ.clickableWords.puncts = ['.',',','!','?',':',';'];

MXOBJ.clickableWords.setOnWordClick = function(elem, callbackFunc, collapseSelection, button) {

	if (!elem) {return;}
	
   	let parent = elem;
	while (parent) {
		if (MXOBJ.isSelectionDisabled(parent)) {MXOBJ.enableSelection(parent);}
  			parent = parent.parentNode;
   	}
	
    let fn = function(evt) {
    	evt=evt||window.event;
    	if (evt.button===2) {MXOBJ.contextMenu.disable(MXOBJ.contextMenu.isEnabled() ? 1000 : -1);}
    	let parent = elem;
    	let disabledSelections = [];
		while (parent) {
			if (MXOBJ.isSelectionDisabled(parent)) {disabledSelections.push(parent);MXOBJ.enableSelection(parent);}
   			parent = parent.parentNode;
   		}
   		
		s = window.getSelection();
        let node = s.anchorNode;
        if (node==null) {return;}
        let range = s.getRangeAt(0);
        if (range==null) {return;}
        while(range.toString().indexOf(' ') !== 0 && range.startOffset>0) {
           range.setStart(node,(range.startOffset -1));
        }
        if (range.toString().indexOf(' ')===0) {range.setStart(node, range.startOffset + 1);}
        do {
          if (node.nodeValue==null || range.endOffset===node.nodeValue.length) {break;}
          range.setEnd(node,range.endOffset + 1);
        } while(range.toString().indexOf(' ') === -1 && range.toString().trim() !== '');

        let str = range.toString().trim();

		// pdf.js stuff for broken words (into multi divs)
		if (MXOBJ.clickableWords.isPdfNode(node)) {
			let actNode = node, cnt = 0;
	        while (cnt<5 && MXOBJ.clickableWords.checkPdfNode(actNode, str, true)) {
	        	range.setEnd(actNode.parentNode.nextSibling.firstChild, actNode.parentNode.nextSibling.firstChild.nodeValue.split(' ')[0].length);
	        	actNode = actNode.parentNode.nextSibling.firstChild;
        		str = actNode.nodeValue.trim();
        		cnt++;
	        }
			actNode = node, cnt = 0;
	        while (cnt<5 && MXOBJ.clickableWords.checkPdfNode(actNode, str, false)) {
	        	let startIdx = actNode.parentNode.previousSibling.firstChild.nodeValue.indexOf(' ')===-1 ? 0 : actNode.parentNode.previousSibling.firstChild.nodeValue.lastIndexOf(' ');
	        	range.setStart(actNode.parentNode.previousSibling.firstChild, startIdx);
	        	actNode = actNode.parentNode.previousSibling.firstChild;
        		str = actNode.nodeValue.trim();
        		cnt++;
	        }
        	str = range.toString().trim();
		}
		// /pdf.js
       
        callbackFunc.call(this, str, evt, node, range);
        if (collapseSelection) {try {range.collapse();} catch(err) {}}
    };
    
    
	if (button===1 || button===3) {MXOBJ.attachEvent(elem, 'click', fn);}
    if (button===2 || button===3) {MXOBJ.attachEvent(elem, 'contextmenu', fn);}

};


MXOBJ.clickableWords.isPdfNode = function(node) {
	return node && node.parentNode && node.parentNode.nodeName.toLowerCase()==='div' && node.parentNode.parentNode && node.parentNode.parentNode.nodeName.toLowerCase()==='div' && node.parentNode.parentNode.getAttribute('class')==='textLayer';
};

MXOBJ.clickableWords.checkPdfNode = function(node, str, checkNext) {
	// console.log('checkPdfNode checkNext: ' + checkNext + '    nodeValue: ' + node.nodeValue + '    str: ' + str);
	let ref = checkNext ? node.parentNode.nextSibling : node.parentNode.previousSibling;
	// console.log('ref: ' + ref);
	if (!ref || node.nodeValue.trim().length===0) {return false;}
	if (MXOBJ.clickableWords.tailWithPunc(node.nodeValue, !checkNext)) {return false;}
	let strOk = checkNext ? node.nodeValue.endsWith(str) : node.nodeValue.startsWith(str);
	// console.log('strOk: ' + strOk);
	if (!strOk) {return false;}
	let refValueOk = ref.nodeName.toLowerCase()==='div' && node.parentNode.style.top===ref.style.top && ref.firstChild && ref.firstChild.nodeType===3 && ref.firstChild.nodeValue.length>0;
	refValueOk = refValueOk && (checkNext ? node.parentNode.nextSibling.firstChild.nodeValue.charAt(0)!==' ' : node.parentNode.previousSibling.firstChild.nodeValue.charAt(node.parentNode.previousSibling.firstChild.nodeValue.length-1)!==' ');
	refValueOk = refValueOk && !MXOBJ.clickableWords.tailWithPunc(ref.firstChild.nodeValue, checkNext);
	// console.log('refValueOk: ' + refValueOk);
	if (!refValueOk) {return false;}
   	let len = node.nodeValue.length;
   	let width = node.parentNode.getBoundingClientRect().width;
   	let oneChar = width/len;
   	let diff = checkNext ? (ref.getBoundingClientRect().left - node.parentNode.getBoundingClientRect().right) : (node.parentNode.getBoundingClientRect().left - ref.getBoundingClientRect().right);
	// console.log('checkNext: ' + checkNext + '   len: ' + len + '   width: ' + width + '   oneChar: ' + oneChar + '   diff: ' + diff + '   text: ' + node.nodeValue + '    ret: ' + (diff<oneChar));
	return diff<oneChar; // maybe 'space' is missing but made by left positions difference
};

MXOBJ.clickableWords.tailWithPunc = function(str, starts) {
	let ch = str && str.length>0 ? str.charAt(starts ? 0 : str.length-1) : null;
	return ch && MXOBJ.arrayContains(ch, MXOBJ.clickableWords.puncts);
};