/** Shortcurs processor
 * http://www.openjs.com/scripts/events/keyboard_shortcuts/
 * Version : 2.01.B
 * By Binny V A
 * License : BSD
 */
shortcut = {
	'all_shortcuts':{},//All the shortcuts are stored in this array
	'add': function(shortcut_combination,callback,opt) {
		//Provide a set of default options
		var default_options = {
			'type':'keydown',
			'propagate':false,
			'disable_in_input':false,
			'target':document,
			'keycode':false
		}
		if(!opt) opt = default_options;
		else {
			for(var dfo in default_options) {
				if(typeof opt[dfo] == 'undefined') opt[dfo] = default_options[dfo];
			}
		}

		var ele = opt.target;
		if(typeof opt.target == 'string') ele = document.getElementById(opt.target);
		var ths = this;
		shortcut_combination = shortcut_combination.toLowerCase();

		//The function to be called at keypress
		var func = function(e) {
			e = e || window.event;

			if(opt['disable_in_input']) { //Don't enable shortcut keys in Input, Textarea fields
				var element;
				if(e.target) element=e.target;
				else if(e.srcElement) element=e.srcElement;
				if(element.nodeType==3) element=element.parentNode;

				if(element.tagName == 'INPUT' || element.tagName == 'TEXTAREA') return;
			}

			//Find Which key is pressed
			if (e.keyCode) code = e.keyCode;
			else if (e.which) code = e.which;
			var character = String.fromCharCode(code).toLowerCase();

			if(code == 188) character=","; //If the user presses , when the type is onkeydown
			if(code == 190) character="."; //If the user presses , when the type is onkeydown

			var keys = shortcut_combination.split("+");
			//Key Pressed - counts the number of valid keypresses - if it is same as the number of keys, the shortcut function is invoked
			var kp = 0;

			//Work around for stupid Shift key bug created by using lowercase - as a result the shift+num combination was broken
			var shift_nums = {
				"`":"~",
				"1":"!",
				"2":"@",
				"3":"#",
				"4":"$",
				"5":"%",
				"6":"^",
				"7":"&",
				"8":"*",
				"9":"(",
				"0":")",
				"-":"_",
				"=":"+",
				";":":",
				"'":"\"",
				",":"<",
				".":">",
				"/":"?",
				"\\":"|"
			}
			//Special Keys - and their codes
			var special_keys = {
				'esc':27,
				'escape':27,
				'tab':9,
				'space':32,
				'return':13,
				'enter':13,
				'backspace':8,

				'scrolllock':145,
				'scroll_lock':145,
				'scroll':145,
				'capslock':20,
				'caps_lock':20,
				'caps':20,
				'numlock':144,
				'num_lock':144,
				'num':144,

				'pause':19,
				'break':19,

				'insert':45,
				'home':36,
				'delete':46,
				'end':35,

				'pageup':33,
				'page_up':33,
				'pu':33,

				'pagedown':34,
				'page_down':34,
				'pd':34,

				'left':37,
				'up':38,
				'right':39,
				'down':40,

				'f1':112,
				'f2':113,
				'f3':114,
				'f4':115,
				'f5':116,
				'f6':117,
				'f7':118,
				'f8':119,
				'f9':120,
				'f10':121,
				'f11':122,
				'f12':123
			}

			var modifiers = {
				shift: { wanted:false, pressed:false},
				ctrl : { wanted:false, pressed:false},
				alt  : { wanted:false, pressed:false},
				meta : { wanted:false, pressed:false}	//Meta is Mac specific
			};

			if(e.ctrlKey)	modifiers.ctrl.pressed = true;
			if(e.shiftKey)	modifiers.shift.pressed = true;
			if(e.altKey)	modifiers.alt.pressed = true;
			if(e.metaKey)   modifiers.meta.pressed = true;

			for(var i=0; k=keys[i],i<keys.length; i++) {
				//Modifiers
				if(k == 'ctrl' || k == 'control') {
					kp++;
					modifiers.ctrl.wanted = true;

				} else if(k == 'shift') {
					kp++;
					modifiers.shift.wanted = true;

				} else if(k == 'alt') {
					kp++;
					modifiers.alt.wanted = true;
				} else if(k == 'meta') {
					kp++;
					modifiers.meta.wanted = true;
				} else if(k.length > 1) { //If it is a special key
					if(special_keys[k] == code) kp++;

				} else if(opt['keycode']) {
					if(opt['keycode'] == code) kp++;

				} else { //The special keys did not match
					if(character == k) kp++;
					else {
						if(shift_nums[character] && e.shiftKey) { //Stupid Shift key bug created by using lowercase
							character = shift_nums[character];
							if(character == k) kp++;
						}
					}
				}
			}

			if(kp == keys.length &&
						modifiers.ctrl.pressed == modifiers.ctrl.wanted &&
						modifiers.shift.pressed == modifiers.shift.wanted &&
						modifiers.alt.pressed == modifiers.alt.wanted &&
						modifiers.meta.pressed == modifiers.meta.wanted) {
				callback(e);

				if(!opt['propagate']) { //Stop the event
					//e.cancelBubble is supported by IE - this will kill the bubbling process.
					e.cancelBubble = true;
					e.returnValue = false;

					//e.stopPropagation works in Firefox.
					if (e.stopPropagation) {
						e.stopPropagation();
						e.preventDefault();
					}
					return false;
				}
			}
		}
		this.all_shortcuts[shortcut_combination] = {
			'callback':func,
			'target':ele,
			'event': opt['type']
		};
		//Attach the function with the event
		if(ele.addEventListener) ele.addEventListener(opt['type'], func, false);
		else if(ele.attachEvent) ele.attachEvent('on'+opt['type'], func);
		else ele['on'+opt['type']] = func;
	},

	//Remove the shortcut - just specify the shortcut and I will remove the binding
	'remove':function(shortcut_combination) {
		shortcut_combination = shortcut_combination.toLowerCase();
		var binding = this.all_shortcuts[shortcut_combination];
		delete(this.all_shortcuts[shortcut_combination])
		if(!binding) return;
		var type = binding['event'];
		var ele = binding['target'];
		var callback = binding['callback'];

		if(ele.detachEvent) ele.detachEvent('on'+type, callback);
		else if(ele.removeEventListener) ele.removeEventListener(type, callback, false);
		else ele['on'+type] = false;
	}
} // Shortcurs processor

/************ Функції забезпечення друку на боці клієнта : ***************/
function RemoveScripts(Node) {
var i, X;
	if (Node.childNodes.length == 0)
	  return;
	for (i = Node.childNodes.length - 1; i >= 0; i--) {
		X = Node.childNodes[i];
		if (X.nodeType == 1 && X.nodeName == 'SCRIPT') {
			Node.removeChild(X);
		}
		else {
			RemoveScripts(X);
		}
	}
}  // RemoveScripts

function GetStuff() {
	var X = document.getElementById('Stuff');
	RemoveScripts(X);
	return X;
} // GetStuff

function CopyStyleSheets(SrcDoc) {
var i, k;
var Res = '';
try {
	for (i = 0; i < SrcDoc.styleSheets.length; i++) {
		var SrcStyleSheet = SrcDoc.styleSheets[i];
		if (SrcDoc.createStyleSheet) {
			Res = Res + SrcStyleSheet.cssText;
    }
    else {
			for (k = 0; k < SrcStyleSheet.cssRules.length; k++) {
	    	var SrcRule = SrcStyleSheet.cssRules[k];
	      Res = Res + SrcRule.selectorText + ' {' + SrcRule.style.cssText + '} ';
	    }
	  }
	}
} catch (error) {};
	return Res;
} // CopyStyleSheets

function PrepareToPrint() {
try {SilentPostRequest('SubCmd=Print');}
catch (error) {};
try {
var	windowVar = window.open('', 'PrintWin');
var Doc = windowVar.document;
	Doc.open('text/html', true);
var Stuff = GetStuff();
var V = '<html><head><meta http-equiv="Content-Type" content="text/html; charset=windows-1251"><style>' + CopyStyleSheets(document) + 	'</style></head><body style="background: #FFFFFF">';
	Doc.writeln(V);
  V = new String(Stuff.innerHTML);
	Doc.write(V);
  V = '</body></html>';
	Doc.write(V);
	Doc.title = document.title;
  V = Doc.getElementById('LeftBox');
  if (V) {
  	var Pr = V.parentNode;
		Pr.removeChild(V);
  }
  Doc.close();
  windowVar.focus();
}
catch (error) {};
	return false;
} // PrepareToPrint

/*************** Функції динамічної зміни вигляду сторінок ****************/
function ChangeBgColor(Elt, Cl) {
	if (Elt)
		Elt.style.backgroundColor = Cl;
} // ChangeBgColor

function ModifyElem(X, ElemId) {
var Z = document.getElementById(ElemId);
	if (Z) {
		Z.innerHTML = X;
		var Y = Z.getElementsByTagName('input');
		if (Y[0]) {
			try {
				Y[0].focus();
			} catch (err) {}
		}
	}
} // ModifyElem

/* Установка фокуса :*/
var FocusId = null;

function ConfirmAction(AText, AParam) {
	AText = AText.replace("%s", AParam);
	return confirm(AText);
} // ConfirmAction

//===========================================================
/* Універсальний обробник завершення завантаження сторінки. Ідея полягає в тому, що DoLoad завжди статично компонується в тег <body>, а практичну роботу виконує інша функція, посилання на яку містить змінна DoLoadFunc. Таким чином, фактичний обробник може знаходитись будь-де, і посилання на нього може присвоюватись теж будь-де */
var DoLoadFunc = null;

function DoLoad() {
	if (DoLoadFunc)
		DoLoadFunc();
	return true;
} // DoLoad

/*************************** Навігація *************************************/
function GetNextNode() {
	SimplePostRequest('SubCmd=GetNextNode&Mode=' + CurrentMode, Scroll, '');
} // GetNextNode

function GetPrevNode() {
	SimplePostRequest('SubCmd=GetPrevNode&Mode=' + CurrentMode, Scroll, '');
} // GetPrevNode

function Scroll(Cmd, ElemId) {
	if (Cmd)
  	window.location.href = Cmd;
} // Scroll

/*************************** Підтримка AJAX ********************************/
function MakeHttpObject() {
/* http://eloquentjavascript.net/chapter14.html */
  try {return new XMLHttpRequest();}
  catch (error) {}
  try {return new ActiveXObject("Msxml2.XMLHTTP");}
  catch (error) {}
  try {return new ActiveXObject("Microsoft.XMLHTTP");}
  catch (error) {}
	return false; //  throw new Error("Could not create HTTP request object.");
} // MakeHttpObject

function SilentPostRequest(PostData) {
  var request = MakeHttpObject();
  if (request) {
	  request.open("POST", '?Cmd=Ajax&Lang=' + CurrentLang, true);
		request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		var P = 'NodeId=' + CurrentNodeId;
		if (PostData)
			P = P + '&' + PostData;
	  request.send(P);
  }
  return false;
} // SilentPostRequest

function SimplePostRequest(PostData, success, ElemId) {
  var request = MakeHttpObject();
  if (!request) {
  	alert('Your browser seems does not support AJAX. Try another browser.');
  	return false;
  }
  request.open("POST", '?Cmd=Ajax&Lang=' + CurrentLang, true);
	request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
	var P = 'NodeId=' + CurrentNodeId;
	if (ElemId)
		P = P + '&Elem=' + ElemId;
	if (PostData)
		P = P + '&' + PostData;
	if (success == ModifyElem) {
		var TempText;
		switch (CurrentLang) {
			case 'en':
				TempText = 'Processing request...';
				break;
			case 'ru':
				TempText = 'Запрос обрабатывается...';
				break;
			case 'uk':
				TempText = 'Запит обробляється...';
				break;
		}
		TempText = '<p class="BodyCenter" style="background-color: yellow; text-decoration: blink">' + TempText + '</p>';
		ModifyElem(TempText, ElemId);
	}
  request.send(P);
  request.onreadystatechange = function() {
    if (request.readyState == 4) {
    	switch (request.status) {
    		case 200 :
    			if (request.responseText == 'Download') {
    				window.location.href = '/?Cmd=Download';
    			}
    			else
    				success(request.responseText, ElemId);
    			break;
    		case 204 :
    			break;
    		default :
    			alert('Error: ' + request.status + ' (' + request.statusText + ')');
    	}
    }
  };
  return false;
} // SimplePostRequest

/************************ Обробка помилок набору ***************************/
function SendTypingError() {
var C;
var err_text;
var wnd = (window.name == 'send_frame') ? parent : window;
var sel_text = null;
  if (wnd.getSelection)
  	err_text = wnd.getSelection();
  else
   	if (wnd.document.getSelection)
   		err_text = wnd.document.getSelection();
    else
    	sel_text = wnd.document.selection;

  if (sel_text) {
    err_text = sel_text.createRange().text;
    var b_text = sel_text.createRange();
    var a_text = sel_text.createRange();
    sel_text = err_text;
    b_text.moveStart("word",-10);
    b_text.moveEnd("character",-err_text.length);
    a_text.moveStart("character",err_text.length);
    a_text.moveEnd("word",10);
    sel_text = b_text.text + ' >>>' + err_text + '<<< ' + a_text.text;
  }
  else {
    if (window.document.body != undefined) {
      sel_text = (wnd.document.body.innerText != undefined) ? wnd.document.body.innerText : wnd.document.body.innerHTML;
      var nn = sel_text.indexOf(err_text);
      if (nn != -1){
        var tmp_str = err_text + "";
        sel_text = sel_text.substring(nn-70, nn) + ' >>>' + err_text + '<<< ' + sel_text.substring(nn + tmp_str.length, nn + tmp_str.length + 70);
      }
      else
      	sel_text = ' >>>' + err_text + '<<< ';
    }
    else
    	sel_text = ' >>>' + err_text + '<<< ';
  }
	var S = new String(err_text);
	var L = S.length;
  if (L == 0 || err_text == " " || err_text == "")
  	return false;
  if (L >= 50) {
  	err_text = TypingErrorNote.replace("%s", 50);
  	alert(err_text);
  	return false;
  }

	C = (TypingErrorMsg) ? ConfirmAction(TypingErrorMsg, sel_text) : confirm(sel_text);
  if (C) {
  	C = 'SubCmd=TypingError&MsgText=' + sel_text;
// http://javascript.ru/tutorial/object/intro - check for existence
		if (window.TypingErrorId)
			C = C + '&TypingErrorId=' + TypingErrorId;
  	SilentPostRequest(C);
		return true;
  }
  return false;
} // SendTypingError

/********************* Add URL functions *********************************/
function AddURLForm() {
	var Y = 'SubCmd=AddURLForm';
	return SimplePostRequest(Y, ModifyElem, 'AddURLPlace');
} // AddURLForm

function isUrl(s) {
	var regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	return regexp.test(s);
} // isUrl

/* function SendNewUrl() must be rewrited to send specific data */
/*********************** Клавішні скорочення *****************************/
shortcut.add("Ctrl+up", GetPrevNode);
shortcut.add("Ctrl+left", GetPrevNode);
shortcut.add("Ctrl+down", GetNextNode);
shortcut.add("Ctrl+right", GetNextNode);
shortcut.add("Ctrl+Enter", SendTypingError);